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 <linux/export.h>
41 #include <scsi/scsi.h>
42 #include <scsi/scsi_host.h>
43 #include <scsi/scsi_cmnd.h>
44 #include <scsi/scsi_eh.h>
45 #include <scsi/scsi_device.h>
46 #include <scsi/scsi_tcq.h>
47 #include <scsi/scsi_transport.h>
48 #include <linux/libata.h>
49 #include <linux/hdreg.h>
50 #include <linux/uaccess.h>
51 #include <linux/suspend.h>
52 #include <asm/unaligned.h>
55 #include "libata-transport.h"
57 #define ATA_SCSI_RBUF_SIZE 4096
59 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
60 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
62 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
64 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
65 const struct scsi_device *scsidev);
66 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
67 const struct scsi_device *scsidev);
69 #define RW_RECOVERY_MPAGE 0x1
70 #define RW_RECOVERY_MPAGE_LEN 12
71 #define CACHE_MPAGE 0x8
72 #define CACHE_MPAGE_LEN 20
73 #define CONTROL_MPAGE 0xa
74 #define CONTROL_MPAGE_LEN 12
75 #define ALL_MPAGES 0x3f
76 #define ALL_SUB_MPAGES 0xff
79 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
81 RW_RECOVERY_MPAGE_LEN - 2,
83 0, /* read retry count */
85 0, /* write retry count */
89 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
92 0, /* contains WCE, needs to be 0 for logic */
93 0, 0, 0, 0, 0, 0, 0, 0, 0,
94 0, /* contains DRA, needs to be 0 for logic */
98 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
100 CONTROL_MPAGE_LEN - 2,
101 2, /* DSENSE=0, GLTSD=1 */
102 0, /* [QAM+QERR may be 1, see 05-359r1] */
103 0, 0, 0, 0, 0xff, 0xff,
104 0, 30 /* extended self test time, see 05-359r1 */
107 static const char *ata_lpm_policy_names[] = {
108 [ATA_LPM_UNKNOWN] = "max_performance",
109 [ATA_LPM_MAX_POWER] = "max_performance",
110 [ATA_LPM_MED_POWER] = "medium_power",
111 [ATA_LPM_MIN_POWER] = "min_power",
114 static ssize_t ata_scsi_lpm_store(struct device *dev,
115 struct device_attribute *attr,
116 const char *buf, size_t count)
118 struct Scsi_Host *shost = class_to_shost(dev);
119 struct ata_port *ap = ata_shost_to_port(shost);
120 enum ata_lpm_policy policy;
123 /* UNKNOWN is internal state, iterate from MAX_POWER */
124 for (policy = ATA_LPM_MAX_POWER;
125 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
126 const char *name = ata_lpm_policy_names[policy];
128 if (strncmp(name, buf, strlen(name)) == 0)
131 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
134 spin_lock_irqsave(ap->lock, flags);
135 ap->target_lpm_policy = policy;
136 ata_port_schedule_eh(ap);
137 spin_unlock_irqrestore(ap->lock, flags);
142 static ssize_t ata_scsi_lpm_show(struct device *dev,
143 struct device_attribute *attr, char *buf)
145 struct Scsi_Host *shost = class_to_shost(dev);
146 struct ata_port *ap = ata_shost_to_port(shost);
148 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
151 return snprintf(buf, PAGE_SIZE, "%s\n",
152 ata_lpm_policy_names[ap->target_lpm_policy]);
154 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
155 ata_scsi_lpm_show, ata_scsi_lpm_store);
156 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
158 static ssize_t ata_scsi_park_show(struct device *device,
159 struct device_attribute *attr, char *buf)
161 struct scsi_device *sdev = to_scsi_device(device);
163 struct ata_link *link;
164 struct ata_device *dev;
165 unsigned long flags, now;
166 unsigned int uninitialized_var(msecs);
169 ap = ata_shost_to_port(sdev->host);
171 spin_lock_irqsave(ap->lock, flags);
172 dev = ata_scsi_find_dev(ap, sdev);
177 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
184 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
185 link->eh_context.unloaded_mask & (1 << dev->devno) &&
186 time_after(dev->unpark_deadline, now))
187 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
192 spin_unlock_irq(ap->lock);
194 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
197 static ssize_t ata_scsi_park_store(struct device *device,
198 struct device_attribute *attr,
199 const char *buf, size_t len)
201 struct scsi_device *sdev = to_scsi_device(device);
203 struct ata_device *dev;
208 rc = strict_strtol(buf, 10, &input);
209 if (rc || input < -2)
211 if (input > ATA_TMOUT_MAX_PARK) {
213 input = ATA_TMOUT_MAX_PARK;
216 ap = ata_shost_to_port(sdev->host);
218 spin_lock_irqsave(ap->lock, flags);
219 dev = ata_scsi_find_dev(ap, sdev);
220 if (unlikely(!dev)) {
224 if (dev->class != ATA_DEV_ATA) {
230 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
235 dev->unpark_deadline = ata_deadline(jiffies, input);
236 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
237 ata_port_schedule_eh(ap);
238 complete(&ap->park_req_pending);
242 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
245 dev->flags |= ATA_DFLAG_NO_UNLOAD;
250 spin_unlock_irqrestore(ap->lock, flags);
252 return rc ? rc : len;
254 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
255 ata_scsi_park_show, ata_scsi_park_store);
256 EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
258 static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
260 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
262 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
266 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
267 const char *buf, size_t count)
269 struct Scsi_Host *shost = class_to_shost(dev);
270 struct ata_port *ap = ata_shost_to_port(shost);
271 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
272 return ap->ops->em_store(ap, buf, count);
277 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
280 struct Scsi_Host *shost = class_to_shost(dev);
281 struct ata_port *ap = ata_shost_to_port(shost);
283 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
284 return ap->ops->em_show(ap, buf);
287 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
288 ata_scsi_em_message_show, ata_scsi_em_message_store);
289 EXPORT_SYMBOL_GPL(dev_attr_em_message);
292 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
295 struct Scsi_Host *shost = class_to_shost(dev);
296 struct ata_port *ap = ata_shost_to_port(shost);
298 return snprintf(buf, 23, "%d\n", ap->em_message_type);
300 DEVICE_ATTR(em_message_type, S_IRUGO,
301 ata_scsi_em_message_type_show, NULL);
302 EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
305 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
308 struct scsi_device *sdev = to_scsi_device(dev);
309 struct ata_port *ap = ata_shost_to_port(sdev->host);
310 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
312 if (atadev && ap->ops->sw_activity_show &&
313 (ap->flags & ATA_FLAG_SW_ACTIVITY))
314 return ap->ops->sw_activity_show(atadev, buf);
319 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
320 const char *buf, size_t count)
322 struct scsi_device *sdev = to_scsi_device(dev);
323 struct ata_port *ap = ata_shost_to_port(sdev->host);
324 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
325 enum sw_activity val;
328 if (atadev && ap->ops->sw_activity_store &&
329 (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
330 val = simple_strtoul(buf, NULL, 0);
332 case OFF: case BLINK_ON: case BLINK_OFF:
333 rc = ap->ops->sw_activity_store(atadev, val);
342 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
343 ata_scsi_activity_store);
344 EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
346 struct device_attribute *ata_common_sdev_attrs[] = {
347 &dev_attr_unload_heads,
350 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
352 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd)
354 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
355 /* "Invalid field in cbd" */
360 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
361 * @sdev: SCSI device for which BIOS geometry is to be determined
362 * @bdev: block device associated with @sdev
363 * @capacity: capacity of SCSI device
364 * @geom: location to which geometry will be output
366 * Generic bios head/sector/cylinder calculator
367 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
368 * mapping. Some situations may arise where the disk is not
369 * bootable if this is not used.
372 * Defined by the SCSI layer. We don't really care.
377 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
378 sector_t capacity, int geom[])
382 sector_div(capacity, 255*63);
389 * ata_scsi_unlock_native_capacity - unlock native capacity
390 * @sdev: SCSI device to adjust device capacity for
392 * This function is called if a partition on @sdev extends beyond
393 * the end of the device. It requests EH to unlock HPA.
396 * Defined by the SCSI layer. Might sleep.
398 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
400 struct ata_port *ap = ata_shost_to_port(sdev->host);
401 struct ata_device *dev;
404 spin_lock_irqsave(ap->lock, flags);
406 dev = ata_scsi_find_dev(ap, sdev);
407 if (dev && dev->n_sectors < dev->n_native_sectors) {
408 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
409 dev->link->eh_info.action |= ATA_EH_RESET;
410 ata_port_schedule_eh(ap);
413 spin_unlock_irqrestore(ap->lock, flags);
414 ata_port_wait_eh(ap);
418 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
420 * @sdev: SCSI device to get identify data for
421 * @arg: User buffer area for identify data
424 * Defined by the SCSI layer. We don't really care.
427 * Zero on success, negative errno on error.
429 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
432 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
433 u16 __user *dst = arg;
439 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
442 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
443 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
446 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
447 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
450 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
451 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
458 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD 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_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
471 u8 scsi_cmd[MAX_COMMAND_SIZE];
472 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
474 enum dma_data_direction data_dir;
480 if (copy_from_user(args, arg, sizeof(args)))
483 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
487 memset(scsi_cmd, 0, sizeof(scsi_cmd));
490 argsize = ATA_SECT_SIZE * args[3];
491 argbuf = kmalloc(argsize, GFP_KERNEL);
492 if (argbuf == NULL) {
497 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
498 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
499 block count in sector count field */
500 data_dir = DMA_FROM_DEVICE;
502 scsi_cmd[1] = (3 << 1); /* Non-data */
503 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
507 scsi_cmd[0] = ATA_16;
509 scsi_cmd[4] = args[2];
510 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
511 scsi_cmd[6] = args[3];
512 scsi_cmd[8] = args[1];
516 scsi_cmd[6] = args[1];
518 scsi_cmd[14] = args[0];
520 /* Good values for timeout and retries? Values below
521 from scsi_ioctl_send_command() for default case... */
522 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
523 sensebuf, (10*HZ), 5, 0, NULL);
525 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
526 u8 *desc = sensebuf + 8;
527 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
529 /* If we set cc then ATA pass-through will cause a
530 * check condition even if no error. Filter that. */
531 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
532 struct scsi_sense_hdr sshdr;
533 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
535 if (sshdr.sense_key == 0 &&
536 sshdr.asc == 0 && sshdr.ascq == 0)
537 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
540 /* Send userspace a few ATA registers (same as drivers/ide) */
541 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
542 desc[0] == 0x09) { /* code is "ATA Descriptor" */
543 args[0] = desc[13]; /* status */
544 args[1] = desc[3]; /* error */
545 args[2] = desc[5]; /* sector count (0:7) */
546 if (copy_to_user(arg, args, sizeof(args)))
558 && copy_to_user(arg + sizeof(args), argbuf, argsize))
567 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
568 * @scsidev: Device to which we are issuing command
569 * @arg: User provided data for issuing command
572 * Defined by the SCSI layer. We don't really care.
575 * Zero on success, negative errno on error.
577 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
580 u8 scsi_cmd[MAX_COMMAND_SIZE];
581 u8 args[7], *sensebuf = NULL;
587 if (copy_from_user(args, arg, sizeof(args)))
590 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
594 memset(scsi_cmd, 0, sizeof(scsi_cmd));
595 scsi_cmd[0] = ATA_16;
596 scsi_cmd[1] = (3 << 1); /* Non-data */
597 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
598 scsi_cmd[4] = args[1];
599 scsi_cmd[6] = args[2];
600 scsi_cmd[8] = args[3];
601 scsi_cmd[10] = args[4];
602 scsi_cmd[12] = args[5];
603 scsi_cmd[13] = args[6] & 0x4f;
604 scsi_cmd[14] = args[0];
606 /* Good values for timeout and retries? Values below
607 from scsi_ioctl_send_command() for default case... */
608 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
609 sensebuf, (10*HZ), 5, 0, NULL);
611 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
612 u8 *desc = sensebuf + 8;
613 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
615 /* If we set cc then ATA pass-through will cause a
616 * check condition even if no error. Filter that. */
617 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
618 struct scsi_sense_hdr sshdr;
619 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
621 if (sshdr.sense_key == 0 &&
622 sshdr.asc == 0 && sshdr.ascq == 0)
623 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
626 /* Send userspace ATA registers */
627 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
628 desc[0] == 0x09) {/* code is "ATA Descriptor" */
629 args[0] = desc[13]; /* status */
630 args[1] = desc[3]; /* error */
631 args[2] = desc[5]; /* sector count (0:7) */
632 args[3] = desc[7]; /* lbal */
633 args[4] = desc[9]; /* lbam */
634 args[5] = desc[11]; /* lbah */
635 args[6] = desc[12]; /* select */
636 if (copy_to_user(arg, args, sizeof(args)))
651 static int ata_ioc32(struct ata_port *ap)
653 if (ap->flags & ATA_FLAG_PIO_DMA)
655 if (ap->pflags & ATA_PFLAG_PIO32)
660 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
661 int cmd, void __user *arg)
663 int val = -EINVAL, rc = -EINVAL;
667 case ATA_IOC_GET_IO32:
668 spin_lock_irqsave(ap->lock, flags);
670 spin_unlock_irqrestore(ap->lock, flags);
671 if (copy_to_user(arg, &val, 1))
675 case ATA_IOC_SET_IO32:
676 val = (unsigned long) arg;
678 spin_lock_irqsave(ap->lock, flags);
679 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
681 ap->pflags |= ATA_PFLAG_PIO32;
683 ap->pflags &= ~ATA_PFLAG_PIO32;
685 if (val != ata_ioc32(ap))
688 spin_unlock_irqrestore(ap->lock, flags);
691 case HDIO_GET_IDENTITY:
692 return ata_get_identity(ap, scsidev, arg);
695 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
697 return ata_cmd_ioctl(scsidev, arg);
699 case HDIO_DRIVE_TASK:
700 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
702 return ata_task_ioctl(scsidev, arg);
711 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
713 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
715 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
718 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
721 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
722 * @dev: ATA device to which the new command is attached
723 * @cmd: SCSI command that originated this ATA command
725 * Obtain a reference to an unused ata_queued_cmd structure,
726 * which is the basic libata structure representing a single
727 * ATA command sent to the hardware.
729 * If a command was available, fill in the SCSI-specific
730 * portions of the structure with information on the
734 * spin_lock_irqsave(host lock)
737 * Command allocated, or %NULL if none available.
739 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
740 struct scsi_cmnd *cmd)
742 struct ata_queued_cmd *qc;
744 qc = ata_qc_new_init(dev);
747 qc->scsidone = cmd->scsi_done;
749 qc->sg = scsi_sglist(cmd);
750 qc->n_elem = scsi_sg_count(cmd);
752 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
759 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
761 struct scsi_cmnd *scmd = qc->scsicmd;
763 qc->extrabytes = scmd->request->extra_len;
764 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
768 * ata_dump_status - user friendly display of error info
769 * @id: id of the port in question
770 * @tf: ptr to filled out taskfile
772 * Decode and dump the ATA error/status registers for the user so
773 * that they have some idea what really happened at the non
774 * make-believe layer.
777 * inherited from caller
779 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
781 u8 stat = tf->command, err = tf->feature;
783 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
784 if (stat & ATA_BUSY) {
785 printk("Busy }\n"); /* Data is not valid in this case */
787 if (stat & 0x40) printk("DriveReady ");
788 if (stat & 0x20) printk("DeviceFault ");
789 if (stat & 0x10) printk("SeekComplete ");
790 if (stat & 0x08) printk("DataRequest ");
791 if (stat & 0x04) printk("CorrectedError ");
792 if (stat & 0x02) printk("Index ");
793 if (stat & 0x01) printk("Error ");
797 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
798 if (err & 0x04) printk("DriveStatusError ");
800 if (err & 0x04) printk("BadCRC ");
801 else printk("Sector ");
803 if (err & 0x40) printk("UncorrectableError ");
804 if (err & 0x10) printk("SectorIdNotFound ");
805 if (err & 0x02) printk("TrackZeroNotFound ");
806 if (err & 0x01) printk("AddrMarkNotFound ");
813 * ata_to_sense_error - convert ATA error to SCSI error
814 * @id: ATA device number
815 * @drv_stat: value contained in ATA status register
816 * @drv_err: value contained in ATA error register
817 * @sk: the sense key we'll fill out
818 * @asc: the additional sense code we'll fill out
819 * @ascq: the additional sense code qualifier we'll fill out
820 * @verbose: be verbose
822 * Converts an ATA error into a SCSI error. Fill out pointers to
823 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
824 * format sense blocks.
827 * spin_lock_irqsave(host lock)
829 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
830 u8 *asc, u8 *ascq, int verbose)
834 /* Based on the 3ware driver translation table */
835 static const unsigned char sense_table[][4] = {
837 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
839 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
841 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
842 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
843 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
844 /* MC|ID|ABRT|TRK0|MARK */
845 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
847 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
848 /* Bad address mark */
849 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
851 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
853 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
854 /* Media change request */
855 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
857 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
859 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
861 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
862 /* BBD - block marked bad */
863 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
864 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
866 static const unsigned char stat_table[][4] = {
867 /* Must be first because BUSY means no other bits valid */
868 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
869 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
870 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
871 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
872 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
876 * Is this an error we can process/parse
878 if (drv_stat & ATA_BUSY) {
879 drv_err = 0; /* Ignore the err bits, they're invalid */
883 /* Look for drv_err */
884 for (i = 0; sense_table[i][0] != 0xFF; i++) {
885 /* Look for best matches first */
886 if ((sense_table[i][0] & drv_err) ==
888 *sk = sense_table[i][1];
889 *asc = sense_table[i][2];
890 *ascq = sense_table[i][3];
894 /* No immediate match */
896 printk(KERN_WARNING "ata%u: no sense translation for "
897 "error 0x%02x\n", id, drv_err);
900 /* Fall back to interpreting status bits */
901 for (i = 0; stat_table[i][0] != 0xFF; i++) {
902 if (stat_table[i][0] & drv_stat) {
903 *sk = stat_table[i][1];
904 *asc = stat_table[i][2];
905 *ascq = stat_table[i][3];
909 /* No error? Undecoded? */
911 printk(KERN_WARNING "ata%u: no sense translation for "
912 "status: 0x%02x\n", id, drv_stat);
914 /* We need a sensible error return here, which is tricky, and one
915 that won't cause people to do things like return a disk wrongly */
916 *sk = ABORTED_COMMAND;
922 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
923 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
924 id, drv_stat, drv_err, *sk, *asc, *ascq);
929 * ata_gen_passthru_sense - Generate check condition sense block.
930 * @qc: Command that completed.
932 * This function is specific to the ATA descriptor format sense
933 * block specified for the ATA pass through commands. Regardless
934 * of whether the command errored or not, return a sense
935 * block. Copy all controller registers into the sense
936 * block. Clear sense key, ASC & ASCQ if there is no error.
941 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
943 struct scsi_cmnd *cmd = qc->scsicmd;
944 struct ata_taskfile *tf = &qc->result_tf;
945 unsigned char *sb = cmd->sense_buffer;
946 unsigned char *desc = sb + 8;
947 int verbose = qc->ap->ops->error_handler == NULL;
949 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
951 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
954 * Use ata_to_sense_error() to map status register bits
955 * onto sense key, asc & ascq.
958 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
959 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
960 &sb[1], &sb[2], &sb[3], verbose);
965 * Sense data is current and format is descriptor.
971 /* set length of additional sense data */
976 * Copy registers into sense buffer.
979 desc[3] = tf->feature; /* == error reg */
984 desc[12] = tf->device;
985 desc[13] = tf->command; /* == status reg */
988 * Fill in Extend bit, and the high order bytes
991 if (tf->flags & ATA_TFLAG_LBA48) {
993 desc[4] = tf->hob_nsect;
994 desc[6] = tf->hob_lbal;
995 desc[8] = tf->hob_lbam;
996 desc[10] = tf->hob_lbah;
1001 * ata_gen_ata_sense - generate a SCSI fixed sense block
1002 * @qc: Command that we are erroring out
1004 * Generate sense block for a failed ATA command @qc. Descriptor
1005 * format is used to accommodate LBA48 block address.
1010 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1012 struct ata_device *dev = qc->dev;
1013 struct scsi_cmnd *cmd = qc->scsicmd;
1014 struct ata_taskfile *tf = &qc->result_tf;
1015 unsigned char *sb = cmd->sense_buffer;
1016 unsigned char *desc = sb + 8;
1017 int verbose = qc->ap->ops->error_handler == NULL;
1020 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1022 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1024 /* sense data is current and format is descriptor */
1027 /* Use ata_to_sense_error() to map status register bits
1028 * onto sense key, asc & ascq.
1031 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1032 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1033 &sb[1], &sb[2], &sb[3], verbose);
1037 block = ata_tf_read_block(&qc->result_tf, dev);
1039 /* information sense data descriptor */
1044 desc[2] |= 0x80; /* valid */
1045 desc[6] = block >> 40;
1046 desc[7] = block >> 32;
1047 desc[8] = block >> 24;
1048 desc[9] = block >> 16;
1049 desc[10] = block >> 8;
1053 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1055 sdev->use_10_for_rw = 1;
1056 sdev->use_10_for_ms = 1;
1057 sdev->no_report_opcodes = 1;
1058 sdev->no_write_same = 1;
1060 /* Schedule policy is determined by ->qc_defer() callback and
1061 * it needs to see every deferred qc. Set dev_blocked to 1 to
1062 * prevent SCSI midlayer from automatically deferring
1065 sdev->max_device_blocked = 1;
1069 * atapi_drain_needed - Check whether data transfer may overflow
1070 * @rq: request to be checked
1072 * ATAPI commands which transfer variable length data to host
1073 * might overflow due to application error or hardare bug. This
1074 * function checks whether overflow should be drained and ignored
1081 * 1 if ; otherwise, 0.
1083 static int atapi_drain_needed(struct request *rq)
1085 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
1088 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
1091 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1094 static int ata_scsi_dev_config(struct scsi_device *sdev,
1095 struct ata_device *dev)
1097 struct request_queue *q = sdev->request_queue;
1099 if (!ata_id_has_unload(dev->id))
1100 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1102 /* configure max sectors */
1103 blk_queue_max_hw_sectors(q, dev->max_sectors);
1105 if (dev->class == ATA_DEV_ATAPI) {
1108 sdev->sector_size = ATA_SECT_SIZE;
1110 /* set DMA padding */
1111 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1113 /* configure draining */
1114 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1116 ata_dev_err(dev, "drain buffer allocation failed\n");
1120 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1122 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1123 sdev->manage_start_stop = 1;
1127 * ata_pio_sectors() expects buffer for each sector to not cross
1128 * page boundary. Enforce it by requiring buffers to be sector
1129 * aligned, which works iff sector_size is not larger than
1130 * PAGE_SIZE. ATAPI devices also need the alignment as
1131 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1133 if (sdev->sector_size > PAGE_SIZE)
1135 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1138 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1140 if (dev->flags & ATA_DFLAG_AN)
1141 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1143 if (dev->flags & ATA_DFLAG_NCQ) {
1146 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1147 depth = min(ATA_MAX_QUEUE - 1, depth);
1148 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
1151 blk_queue_flush_queueable(q, false);
1158 * ata_scsi_slave_config - Set SCSI device attributes
1159 * @sdev: SCSI device to examine
1161 * This is called before we actually start reading
1162 * and writing to the device, to configure certain
1163 * SCSI mid-layer behaviors.
1166 * Defined by SCSI layer. We don't really care.
1169 int ata_scsi_slave_config(struct scsi_device *sdev)
1171 struct ata_port *ap = ata_shost_to_port(sdev->host);
1172 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1175 ata_scsi_sdev_config(sdev);
1178 rc = ata_scsi_dev_config(sdev, dev);
1184 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1185 * @sdev: SCSI device to be destroyed
1187 * @sdev is about to be destroyed for hot/warm unplugging. If
1188 * this unplugging was initiated by libata as indicated by NULL
1189 * dev->sdev, this function doesn't have to do anything.
1190 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1191 * Clear dev->sdev, schedule the device for ATA detach and invoke
1195 * Defined by SCSI layer. We don't really care.
1197 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1199 struct ata_port *ap = ata_shost_to_port(sdev->host);
1200 struct request_queue *q = sdev->request_queue;
1201 unsigned long flags;
1202 struct ata_device *dev;
1204 if (!ap->ops->error_handler)
1207 spin_lock_irqsave(ap->lock, flags);
1208 dev = __ata_scsi_find_dev(ap, sdev);
1209 if (dev && dev->sdev) {
1210 /* SCSI device already in CANCEL state, no need to offline it */
1212 dev->flags |= ATA_DFLAG_DETACH;
1213 ata_port_schedule_eh(ap);
1215 spin_unlock_irqrestore(ap->lock, flags);
1217 kfree(q->dma_drain_buffer);
1218 q->dma_drain_buffer = NULL;
1219 q->dma_drain_size = 0;
1223 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1224 * @ap: ATA port to which the device change the queue depth
1225 * @sdev: SCSI device to configure queue depth for
1226 * @queue_depth: new queue depth
1227 * @reason: calling context
1229 * libsas and libata have different approaches for associating a sdev to
1233 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1234 int queue_depth, int reason)
1236 struct ata_device *dev;
1237 unsigned long flags;
1239 if (reason != SCSI_QDEPTH_DEFAULT)
1242 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1243 return sdev->queue_depth;
1245 dev = ata_scsi_find_dev(ap, sdev);
1246 if (!dev || !ata_dev_enabled(dev))
1247 return sdev->queue_depth;
1250 spin_lock_irqsave(ap->lock, flags);
1251 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1252 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1253 dev->flags |= ATA_DFLAG_NCQ_OFF;
1256 spin_unlock_irqrestore(ap->lock, flags);
1258 /* limit and apply queue depth */
1259 queue_depth = min(queue_depth, sdev->host->can_queue);
1260 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1261 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1263 if (sdev->queue_depth == queue_depth)
1266 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
1271 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1272 * @sdev: SCSI device to configure queue depth for
1273 * @queue_depth: new queue depth
1274 * @reason: calling context
1276 * This is libata standard hostt->change_queue_depth callback.
1277 * SCSI will call into this callback when user tries to set queue
1281 * SCSI layer (we don't care)
1284 * Newly configured queue depth.
1286 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth,
1289 struct ata_port *ap = ata_shost_to_port(sdev->host);
1291 return __ata_change_queue_depth(ap, sdev, queue_depth, reason);
1295 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1296 * @qc: Storage for translated ATA taskfile
1298 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1299 * (to start). Perhaps these commands should be preceded by
1300 * CHECK POWER MODE to see what power mode the device is already in.
1301 * [See SAT revision 5 at www.t10.org]
1304 * spin_lock_irqsave(host lock)
1307 * Zero on success, non-zero on error.
1309 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1311 struct scsi_cmnd *scmd = qc->scsicmd;
1312 struct ata_taskfile *tf = &qc->tf;
1313 const u8 *cdb = scmd->cmnd;
1315 if (scmd->cmd_len < 5)
1318 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1319 tf->protocol = ATA_PROT_NODATA;
1321 ; /* ignore IMMED bit, violates sat-r05 */
1324 goto invalid_fld; /* LOEJ bit set not supported */
1325 if (((cdb[4] >> 4) & 0xf) != 0)
1326 goto invalid_fld; /* power conditions not supported */
1329 tf->nsect = 1; /* 1 sector, lba=0 */
1331 if (qc->dev->flags & ATA_DFLAG_LBA) {
1332 tf->flags |= ATA_TFLAG_LBA;
1337 tf->device |= ATA_LBA;
1340 tf->lbal = 0x1; /* sect */
1341 tf->lbam = 0x0; /* cyl low */
1342 tf->lbah = 0x0; /* cyl high */
1345 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1347 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1348 * or S5) causing some drives to spin up and down again.
1350 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1351 system_state == SYSTEM_POWER_OFF)
1354 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1355 system_entering_hibernation())
1358 /* Issue ATA STANDBY IMMEDIATE command */
1359 tf->command = ATA_CMD_STANDBYNOW1;
1363 * Standby and Idle condition timers could be implemented but that
1364 * would require libata to implement the Power condition mode page
1365 * and allow the user to change it. Changing mode pages requires
1366 * MODE SELECT to be implemented.
1372 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1373 /* "Invalid field in cbd" */
1376 scmd->result = SAM_STAT_GOOD;
1382 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1383 * @qc: Storage for translated ATA taskfile
1385 * Sets up an ATA taskfile to issue FLUSH CACHE or
1389 * spin_lock_irqsave(host lock)
1392 * Zero on success, non-zero on error.
1394 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1396 struct ata_taskfile *tf = &qc->tf;
1398 tf->flags |= ATA_TFLAG_DEVICE;
1399 tf->protocol = ATA_PROT_NODATA;
1401 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1402 tf->command = ATA_CMD_FLUSH_EXT;
1404 tf->command = ATA_CMD_FLUSH;
1406 /* flush is critical for IO integrity, consider it an IO command */
1407 qc->flags |= ATA_QCFLAG_IO;
1413 * scsi_6_lba_len - Get LBA and transfer length
1414 * @cdb: SCSI command to translate
1416 * Calculate LBA and transfer length for 6-byte commands.
1420 * @plen: the transfer length
1422 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1427 VPRINTK("six-byte command\n");
1429 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1430 lba |= ((u64)cdb[2]) << 8;
1431 lba |= ((u64)cdb[3]);
1440 * scsi_10_lba_len - Get LBA and transfer length
1441 * @cdb: SCSI command to translate
1443 * Calculate LBA and transfer length for 10-byte commands.
1447 * @plen: the transfer length
1449 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1454 VPRINTK("ten-byte command\n");
1456 lba |= ((u64)cdb[2]) << 24;
1457 lba |= ((u64)cdb[3]) << 16;
1458 lba |= ((u64)cdb[4]) << 8;
1459 lba |= ((u64)cdb[5]);
1461 len |= ((u32)cdb[7]) << 8;
1462 len |= ((u32)cdb[8]);
1469 * scsi_16_lba_len - Get LBA and transfer length
1470 * @cdb: SCSI command to translate
1472 * Calculate LBA and transfer length for 16-byte commands.
1476 * @plen: the transfer length
1478 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1483 VPRINTK("sixteen-byte command\n");
1485 lba |= ((u64)cdb[2]) << 56;
1486 lba |= ((u64)cdb[3]) << 48;
1487 lba |= ((u64)cdb[4]) << 40;
1488 lba |= ((u64)cdb[5]) << 32;
1489 lba |= ((u64)cdb[6]) << 24;
1490 lba |= ((u64)cdb[7]) << 16;
1491 lba |= ((u64)cdb[8]) << 8;
1492 lba |= ((u64)cdb[9]);
1494 len |= ((u32)cdb[10]) << 24;
1495 len |= ((u32)cdb[11]) << 16;
1496 len |= ((u32)cdb[12]) << 8;
1497 len |= ((u32)cdb[13]);
1504 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1505 * @qc: Storage for translated ATA taskfile
1507 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1510 * spin_lock_irqsave(host lock)
1513 * Zero on success, non-zero on error.
1515 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1517 struct scsi_cmnd *scmd = qc->scsicmd;
1518 struct ata_taskfile *tf = &qc->tf;
1519 struct ata_device *dev = qc->dev;
1520 u64 dev_sectors = qc->dev->n_sectors;
1521 const u8 *cdb = scmd->cmnd;
1525 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1526 tf->protocol = ATA_PROT_NODATA;
1528 if (cdb[0] == VERIFY) {
1529 if (scmd->cmd_len < 10)
1531 scsi_10_lba_len(cdb, &block, &n_block);
1532 } else if (cdb[0] == VERIFY_16) {
1533 if (scmd->cmd_len < 16)
1535 scsi_16_lba_len(cdb, &block, &n_block);
1541 if (block >= dev_sectors)
1543 if ((block + n_block) > dev_sectors)
1546 if (dev->flags & ATA_DFLAG_LBA) {
1547 tf->flags |= ATA_TFLAG_LBA;
1549 if (lba_28_ok(block, n_block)) {
1551 tf->command = ATA_CMD_VERIFY;
1552 tf->device |= (block >> 24) & 0xf;
1553 } else if (lba_48_ok(block, n_block)) {
1554 if (!(dev->flags & ATA_DFLAG_LBA48))
1558 tf->flags |= ATA_TFLAG_LBA48;
1559 tf->command = ATA_CMD_VERIFY_EXT;
1561 tf->hob_nsect = (n_block >> 8) & 0xff;
1563 tf->hob_lbah = (block >> 40) & 0xff;
1564 tf->hob_lbam = (block >> 32) & 0xff;
1565 tf->hob_lbal = (block >> 24) & 0xff;
1567 /* request too large even for LBA48 */
1570 tf->nsect = n_block & 0xff;
1572 tf->lbah = (block >> 16) & 0xff;
1573 tf->lbam = (block >> 8) & 0xff;
1574 tf->lbal = block & 0xff;
1576 tf->device |= ATA_LBA;
1579 u32 sect, head, cyl, track;
1581 if (!lba_28_ok(block, n_block))
1584 /* Convert LBA to CHS */
1585 track = (u32)block / dev->sectors;
1586 cyl = track / dev->heads;
1587 head = track % dev->heads;
1588 sect = (u32)block % dev->sectors + 1;
1590 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1591 (u32)block, track, cyl, head, sect);
1593 /* Check whether the converted CHS can fit.
1597 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1600 tf->command = ATA_CMD_VERIFY;
1601 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1604 tf->lbah = cyl >> 8;
1611 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1612 /* "Invalid field in cbd" */
1616 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1617 /* "Logical Block Address out of range" */
1621 scmd->result = SAM_STAT_GOOD;
1626 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1627 * @qc: Storage for translated ATA taskfile
1629 * Converts any of six SCSI read/write commands into the
1630 * ATA counterpart, including starting sector (LBA),
1631 * sector count, and taking into account the device's LBA48
1634 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1635 * %WRITE_16 are currently supported.
1638 * spin_lock_irqsave(host lock)
1641 * Zero on success, non-zero on error.
1643 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1645 struct scsi_cmnd *scmd = qc->scsicmd;
1646 const u8 *cdb = scmd->cmnd;
1647 unsigned int tf_flags = 0;
1652 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1653 tf_flags |= ATA_TFLAG_WRITE;
1655 /* Calculate the SCSI LBA, transfer length and FUA. */
1659 if (unlikely(scmd->cmd_len < 10))
1661 scsi_10_lba_len(cdb, &block, &n_block);
1662 if (cdb[1] & (1 << 3))
1663 tf_flags |= ATA_TFLAG_FUA;
1667 if (unlikely(scmd->cmd_len < 6))
1669 scsi_6_lba_len(cdb, &block, &n_block);
1671 /* for 6-byte r/w commands, transfer length 0
1672 * means 256 blocks of data, not 0 block.
1679 if (unlikely(scmd->cmd_len < 16))
1681 scsi_16_lba_len(cdb, &block, &n_block);
1682 if (cdb[1] & (1 << 3))
1683 tf_flags |= ATA_TFLAG_FUA;
1686 DPRINTK("no-byte command\n");
1690 /* Check and compose ATA command */
1692 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1693 * length 0 means transfer 0 block of data.
1694 * However, for ATA R/W commands, sector count 0 means
1695 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1697 * WARNING: one or two older ATA drives treat 0 as 0...
1701 qc->flags |= ATA_QCFLAG_IO;
1702 qc->nbytes = n_block * scmd->device->sector_size;
1704 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1706 if (likely(rc == 0))
1711 /* treat all other errors as -EINVAL, fall through */
1713 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1714 /* "Invalid field in cbd" */
1718 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1719 /* "Logical Block Address out of range" */
1723 scmd->result = SAM_STAT_GOOD;
1727 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1729 struct ata_port *ap = qc->ap;
1730 struct scsi_cmnd *cmd = qc->scsicmd;
1731 u8 *cdb = cmd->cmnd;
1732 int need_sense = (qc->err_mask != 0);
1734 /* For ATA pass thru (SAT) commands, generate a sense block if
1735 * user mandated it or if there's an error. Note that if we
1736 * generate because the user forced us to, a check condition
1737 * is generated and the ATA register values are returned
1738 * whether the command completed successfully or not. If there
1739 * was no error, SK, ASC and ASCQ will all be zero.
1741 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1742 ((cdb[2] & 0x20) || need_sense)) {
1743 ata_gen_passthru_sense(qc);
1746 cmd->result = SAM_STAT_GOOD;
1748 /* TODO: decide which descriptor format to use
1749 * for 48b LBA devices and call that here
1750 * instead of the fixed desc, which is only
1751 * good for smaller LBA (and maybe CHS?)
1754 ata_gen_ata_sense(qc);
1758 if (need_sense && !ap->ops->error_handler)
1759 ata_dump_status(ap->print_id, &qc->result_tf);
1767 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1768 * @dev: ATA device to which the command is addressed
1769 * @cmd: SCSI command to execute
1770 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1772 * Our ->queuecommand() function has decided that the SCSI
1773 * command issued can be directly translated into an ATA
1774 * command, rather than handled internally.
1776 * This function sets up an ata_queued_cmd structure for the
1777 * SCSI command, and sends that ata_queued_cmd to the hardware.
1779 * The xlat_func argument (actor) returns 0 if ready to execute
1780 * ATA command, else 1 to finish translation. If 1 is returned
1781 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1782 * to be set reflecting an error condition or clean (early)
1786 * spin_lock_irqsave(host lock)
1789 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1790 * needs to be deferred.
1792 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1793 ata_xlat_func_t xlat_func)
1795 struct ata_port *ap = dev->link->ap;
1796 struct ata_queued_cmd *qc;
1801 qc = ata_scsi_qc_new(dev, cmd);
1805 /* data is present; dma-map it */
1806 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1807 cmd->sc_data_direction == DMA_TO_DEVICE) {
1808 if (unlikely(scsi_bufflen(cmd) < 1)) {
1809 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
1813 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1815 qc->dma_dir = cmd->sc_data_direction;
1818 qc->complete_fn = ata_scsi_qc_complete;
1823 if (ap->ops->qc_defer) {
1824 if ((rc = ap->ops->qc_defer(qc)))
1828 /* select device, send command to hardware */
1836 cmd->scsi_done(cmd);
1837 DPRINTK("EXIT - early finish (good or error)\n");
1842 cmd->result = (DID_ERROR << 16);
1843 cmd->scsi_done(cmd);
1845 DPRINTK("EXIT - internal\n");
1850 DPRINTK("EXIT - defer\n");
1851 if (rc == ATA_DEFER_LINK)
1852 return SCSI_MLQUEUE_DEVICE_BUSY;
1854 return SCSI_MLQUEUE_HOST_BUSY;
1858 * ata_scsi_rbuf_get - Map response buffer.
1859 * @cmd: SCSI command containing buffer to be mapped.
1860 * @flags: unsigned long variable to store irq enable status
1861 * @copy_in: copy in from user buffer
1863 * Prepare buffer for simulated SCSI commands.
1866 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1869 * Pointer to response buffer.
1871 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1872 unsigned long *flags)
1874 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1876 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1878 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1879 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1880 return ata_scsi_rbuf;
1884 * ata_scsi_rbuf_put - Unmap response buffer.
1885 * @cmd: SCSI command containing buffer to be unmapped.
1886 * @copy_out: copy out result
1887 * @flags: @flags passed to ata_scsi_rbuf_get()
1889 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1890 * @copy_back is true.
1893 * Unlocks ata_scsi_rbuf_lock.
1895 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1896 unsigned long *flags)
1899 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1900 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1901 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1905 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1906 * @args: device IDENTIFY data / SCSI command of interest.
1907 * @actor: Callback hook for desired SCSI command simulator
1909 * Takes care of the hard work of simulating a SCSI command...
1910 * Mapping the response buffer, calling the command's handler,
1911 * and handling the handler's return value. This return value
1912 * indicates whether the handler wishes the SCSI command to be
1913 * completed successfully (0), or not (in which case cmd->result
1914 * and sense buffer are assumed to be set).
1917 * spin_lock_irqsave(host lock)
1919 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1920 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1924 struct scsi_cmnd *cmd = args->cmd;
1925 unsigned long flags;
1927 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1928 rc = actor(args, rbuf);
1929 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
1932 cmd->result = SAM_STAT_GOOD;
1937 * ata_scsiop_inq_std - Simulate INQUIRY command
1938 * @args: device IDENTIFY data / SCSI command of interest.
1939 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1941 * Returns standard device identification data associated
1942 * with non-VPD INQUIRY command output.
1945 * spin_lock_irqsave(host lock)
1947 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1949 const u8 versions[] = {
1950 0x60, /* SAM-3 (no version claimed) */
1953 0x20, /* SBC-2 (no version claimed) */
1956 0x60 /* SPC-3 (no version claimed) */
1961 0x5, /* claim SPC-3 version compatibility */
1968 /* set scsi removeable (RMB) bit per ata bit */
1969 if (ata_id_removeable(args->id))
1972 memcpy(rbuf, hdr, sizeof(hdr));
1973 memcpy(&rbuf[8], "ATA ", 8);
1974 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1975 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1977 if (rbuf[32] == 0 || rbuf[32] == ' ')
1978 memcpy(&rbuf[32], "n/a ", 4);
1980 memcpy(rbuf + 59, versions, sizeof(versions));
1986 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1987 * @args: device IDENTIFY data / SCSI command of interest.
1988 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1990 * Returns list of inquiry VPD pages available.
1993 * spin_lock_irqsave(host lock)
1995 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1997 const u8 pages[] = {
1998 0x00, /* page 0x00, this page */
1999 0x80, /* page 0x80, unit serial no page */
2000 0x83, /* page 0x83, device ident page */
2001 0x89, /* page 0x89, ata info page */
2002 0xb0, /* page 0xb0, block limits page */
2003 0xb1, /* page 0xb1, block device characteristics page */
2004 0xb2, /* page 0xb2, thin provisioning page */
2007 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
2008 memcpy(rbuf + 4, pages, sizeof(pages));
2013 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2014 * @args: device IDENTIFY data / SCSI command of interest.
2015 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2017 * Returns ATA device serial number.
2020 * spin_lock_irqsave(host lock)
2022 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2026 0x80, /* this page code */
2028 ATA_ID_SERNO_LEN, /* page len */
2031 memcpy(rbuf, hdr, sizeof(hdr));
2032 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2033 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2038 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2039 * @args: device IDENTIFY data / SCSI command of interest.
2040 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2042 * Yields two logical unit device identification designators:
2043 * - vendor specific ASCII containing the ATA serial number
2044 * - SAT defined "t10 vendor id based" containing ASCII vendor
2045 * name ("ATA "), model and serial numbers.
2048 * spin_lock_irqsave(host lock)
2050 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2052 const int sat_model_serial_desc_len = 68;
2055 rbuf[1] = 0x83; /* this page code */
2058 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2060 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2062 ata_id_string(args->id, (unsigned char *) rbuf + num,
2063 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2064 num += ATA_ID_SERNO_LEN;
2066 /* SAT defined lu model and serial numbers descriptor */
2067 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2070 rbuf[num + 3] = sat_model_serial_desc_len;
2072 memcpy(rbuf + num, "ATA ", 8);
2074 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2076 num += ATA_ID_PROD_LEN;
2077 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2079 num += ATA_ID_SERNO_LEN;
2081 if (ata_id_has_wwn(args->id)) {
2082 /* SAT defined lu world wide name */
2083 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2086 rbuf[num + 3] = ATA_ID_WWN_LEN;
2088 ata_id_string(args->id, (unsigned char *) rbuf + num,
2089 ATA_ID_WWN, ATA_ID_WWN_LEN);
2090 num += ATA_ID_WWN_LEN;
2092 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2097 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2098 * @args: device IDENTIFY data / SCSI command of interest.
2099 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2101 * Yields SAT-specified ATA VPD page.
2104 * spin_lock_irqsave(host lock)
2106 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2108 struct ata_taskfile tf;
2110 memset(&tf, 0, sizeof(tf));
2112 rbuf[1] = 0x89; /* our page code */
2113 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2114 rbuf[3] = (0x238 & 0xff);
2116 memcpy(&rbuf[8], "linux ", 8);
2117 memcpy(&rbuf[16], "libata ", 16);
2118 memcpy(&rbuf[32], DRV_VERSION, 4);
2119 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2121 /* we don't store the ATA device signature, so we fake it */
2123 tf.command = ATA_DRDY; /* really, this is Status reg */
2127 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2128 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2130 rbuf[56] = ATA_CMD_ID_ATA;
2132 memcpy(&rbuf[60], &args->id[0], 512);
2136 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2141 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2144 * Optimal transfer length granularity.
2146 * This is always one physical block, but for disks with a smaller
2147 * logical than physical sector size we need to figure out what the
2150 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2151 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2154 * Optimal unmap granularity.
2156 * The ATA spec doesn't even know about a granularity or alignment
2157 * for the TRIM command. We can leave away most of the unmap related
2158 * VPD page entries, but we have specifify a granularity to signal
2159 * that we support some form of unmap - in thise case via WRITE SAME
2160 * with the unmap bit set.
2162 if (ata_id_has_trim(args->id)) {
2163 put_unaligned_be64(65535 * 512 / 8, &rbuf[36]);
2164 put_unaligned_be32(1, &rbuf[28]);
2170 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2172 int form_factor = ata_id_form_factor(args->id);
2173 int media_rotation_rate = ata_id_rotation_rate(args->id);
2177 rbuf[4] = media_rotation_rate >> 8;
2178 rbuf[5] = media_rotation_rate;
2179 rbuf[7] = form_factor;
2184 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2186 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2189 rbuf[5] = 1 << 6; /* TPWS */
2195 * ata_scsiop_noop - Command handler that simply returns success.
2196 * @args: device IDENTIFY data / SCSI command of interest.
2197 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2199 * No operation. Simply returns success to caller, to indicate
2200 * that the caller should successfully complete this SCSI command.
2203 * spin_lock_irqsave(host lock)
2205 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
2212 * modecpy - Prepare response for MODE SENSE
2213 * @dest: output buffer
2214 * @src: data being copied
2215 * @n: length of mode page
2216 * @changeable: whether changeable parameters are requested
2218 * Generate a generic MODE SENSE page for either current or changeable
2224 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2227 memcpy(dest, src, 2);
2228 memset(dest + 2, 0, n - 2);
2230 memcpy(dest, src, n);
2235 * ata_msense_caching - Simulate MODE SENSE caching info page
2236 * @id: device IDENTIFY data
2237 * @buf: output buffer
2238 * @changeable: whether changeable parameters are requested
2240 * Generate a caching info page, which conditionally indicates
2241 * write caching to the SCSI layer, depending on device
2247 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2249 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2250 if (changeable || ata_id_wcache_enabled(id))
2251 buf[2] |= (1 << 2); /* write cache enable */
2252 if (!changeable && !ata_id_rahead_enabled(id))
2253 buf[12] |= (1 << 5); /* disable read ahead */
2254 return sizeof(def_cache_mpage);
2258 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2259 * @buf: output buffer
2260 * @changeable: whether changeable parameters are requested
2262 * Generate a generic MODE SENSE control mode page.
2267 static unsigned int ata_msense_ctl_mode(u8 *buf, bool changeable)
2269 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2270 return sizeof(def_control_mpage);
2274 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2275 * @buf: output buffer
2276 * @changeable: whether changeable parameters are requested
2278 * Generate a generic MODE SENSE r/w error recovery page.
2283 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2285 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2287 return sizeof(def_rw_recovery_mpage);
2291 * We can turn this into a real blacklist if it's needed, for now just
2292 * blacklist any Maxtor BANC1G10 revision firmware
2294 static int ata_dev_supports_fua(u16 *id)
2296 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2300 if (!ata_id_has_fua(id))
2303 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2304 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2306 if (strcmp(model, "Maxtor"))
2308 if (strcmp(fw, "BANC1G10"))
2311 return 0; /* blacklisted */
2315 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2316 * @args: device IDENTIFY data / SCSI command of interest.
2317 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2319 * Simulate MODE SENSE commands. Assume this is invoked for direct
2320 * access devices (e.g. disks) only. There should be no block
2321 * descriptor for other device types.
2324 * spin_lock_irqsave(host lock)
2326 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2328 struct ata_device *dev = args->dev;
2329 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2330 const u8 sat_blk_desc[] = {
2331 0, 0, 0, 0, /* number of blocks: sat unspecified */
2333 0, 0x2, 0x0 /* block length: 512 bytes */
2336 unsigned int ebd, page_control, six_byte;
2341 six_byte = (scsicmd[0] == MODE_SENSE);
2342 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2344 * LLBA bit in msense(10) ignored (compliant)
2347 page_control = scsicmd[2] >> 6;
2348 switch (page_control) {
2349 case 0: /* current */
2350 case 1: /* changeable */
2351 case 2: /* defaults */
2352 break; /* supported */
2354 goto saving_not_supp;
2360 p += 4 + (ebd ? 8 : 0);
2362 p += 8 + (ebd ? 8 : 0);
2364 pg = scsicmd[2] & 0x3f;
2367 * No mode subpages supported (yet) but asking for _all_
2368 * subpages may be valid
2370 if (spg && (spg != ALL_SUB_MPAGES))
2374 case RW_RECOVERY_MPAGE:
2375 p += ata_msense_rw_recovery(p, page_control == 1);
2379 p += ata_msense_caching(args->id, p, page_control == 1);
2383 p += ata_msense_ctl_mode(p, page_control == 1);
2387 p += ata_msense_rw_recovery(p, page_control == 1);
2388 p += ata_msense_caching(args->id, p, page_control == 1);
2389 p += ata_msense_ctl_mode(p, page_control == 1);
2392 default: /* invalid page code */
2397 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2398 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2402 rbuf[0] = p - rbuf - 1;
2405 rbuf[3] = sizeof(sat_blk_desc);
2406 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2409 unsigned int output_len = p - rbuf - 2;
2411 rbuf[0] = output_len >> 8;
2412 rbuf[1] = output_len;
2415 rbuf[7] = sizeof(sat_blk_desc);
2416 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2422 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2423 /* "Invalid field in cbd" */
2427 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2428 /* "Saving parameters not supported" */
2433 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2434 * @args: device IDENTIFY data / SCSI command of interest.
2435 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2437 * Simulate READ CAPACITY commands.
2442 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2444 struct ata_device *dev = args->dev;
2445 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2446 u32 sector_size; /* physical sector size in bytes */
2450 sector_size = ata_id_logical_sector_size(dev->id);
2451 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2452 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2456 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2457 if (last_lba >= 0xffffffffULL)
2458 last_lba = 0xffffffff;
2460 /* sector count, 32-bit */
2461 rbuf[0] = last_lba >> (8 * 3);
2462 rbuf[1] = last_lba >> (8 * 2);
2463 rbuf[2] = last_lba >> (8 * 1);
2467 rbuf[4] = sector_size >> (8 * 3);
2468 rbuf[5] = sector_size >> (8 * 2);
2469 rbuf[6] = sector_size >> (8 * 1);
2470 rbuf[7] = sector_size;
2472 /* sector count, 64-bit */
2473 rbuf[0] = last_lba >> (8 * 7);
2474 rbuf[1] = last_lba >> (8 * 6);
2475 rbuf[2] = last_lba >> (8 * 5);
2476 rbuf[3] = last_lba >> (8 * 4);
2477 rbuf[4] = last_lba >> (8 * 3);
2478 rbuf[5] = last_lba >> (8 * 2);
2479 rbuf[6] = last_lba >> (8 * 1);
2483 rbuf[ 8] = sector_size >> (8 * 3);
2484 rbuf[ 9] = sector_size >> (8 * 2);
2485 rbuf[10] = sector_size >> (8 * 1);
2486 rbuf[11] = sector_size;
2489 rbuf[13] = log2_per_phys;
2490 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2491 rbuf[15] = lowest_aligned;
2493 if (ata_id_has_trim(args->id)) {
2494 rbuf[14] |= 0x80; /* TPE */
2496 if (ata_id_has_zero_after_trim(args->id))
2497 rbuf[14] |= 0x40; /* TPRZ */
2505 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2506 * @args: device IDENTIFY data / SCSI command of interest.
2507 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2509 * Simulate REPORT LUNS command.
2512 * spin_lock_irqsave(host lock)
2514 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2517 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2522 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2524 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2525 /* FIXME: not quite right; we don't want the
2526 * translation of taskfile registers into
2527 * a sense descriptors, since that's only
2528 * correct for ATA, not ATAPI
2530 ata_gen_passthru_sense(qc);
2533 qc->scsidone(qc->scsicmd);
2537 /* is it pointless to prefer PIO for "safety reasons"? */
2538 static inline int ata_pio_use_silly(struct ata_port *ap)
2540 return (ap->flags & ATA_FLAG_PIO_DMA);
2543 static void atapi_request_sense(struct ata_queued_cmd *qc)
2545 struct ata_port *ap = qc->ap;
2546 struct scsi_cmnd *cmd = qc->scsicmd;
2548 DPRINTK("ATAPI request sense\n");
2550 /* FIXME: is this needed? */
2551 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2553 #ifdef CONFIG_ATA_SFF
2554 if (ap->ops->sff_tf_read)
2555 ap->ops->sff_tf_read(ap, &qc->tf);
2558 /* fill these in, for the case where they are -not- overwritten */
2559 cmd->sense_buffer[0] = 0x70;
2560 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2564 /* setup sg table and init transfer direction */
2565 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2566 ata_sg_init(qc, &qc->sgent, 1);
2567 qc->dma_dir = DMA_FROM_DEVICE;
2569 memset(&qc->cdb, 0, qc->dev->cdb_len);
2570 qc->cdb[0] = REQUEST_SENSE;
2571 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2573 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2574 qc->tf.command = ATA_CMD_PACKET;
2576 if (ata_pio_use_silly(ap)) {
2577 qc->tf.protocol = ATAPI_PROT_DMA;
2578 qc->tf.feature |= ATAPI_PKT_DMA;
2580 qc->tf.protocol = ATAPI_PROT_PIO;
2581 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2584 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2586 qc->complete_fn = atapi_sense_complete;
2593 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2595 struct scsi_cmnd *cmd = qc->scsicmd;
2596 unsigned int err_mask = qc->err_mask;
2598 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2600 /* handle completion from new EH */
2601 if (unlikely(qc->ap->ops->error_handler &&
2602 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2604 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2605 /* FIXME: not quite right; we don't want the
2606 * translation of taskfile registers into a
2607 * sense descriptors, since that's only
2608 * correct for ATA, not ATAPI
2610 ata_gen_passthru_sense(qc);
2613 /* SCSI EH automatically locks door if sdev->locked is
2614 * set. Sometimes door lock request continues to
2615 * fail, for example, when no media is present. This
2616 * creates a loop - SCSI EH issues door lock which
2617 * fails and gets invoked again to acquire sense data
2618 * for the failed command.
2620 * If door lock fails, always clear sdev->locked to
2621 * avoid this infinite loop.
2623 * This may happen before SCSI scan is complete. Make
2624 * sure qc->dev->sdev isn't NULL before dereferencing.
2626 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2627 qc->dev->sdev->locked = 0;
2629 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2635 /* successful completion or old EH failure path */
2636 if (unlikely(err_mask & AC_ERR_DEV)) {
2637 cmd->result = SAM_STAT_CHECK_CONDITION;
2638 atapi_request_sense(qc);
2640 } else if (unlikely(err_mask)) {
2641 /* FIXME: not quite right; we don't want the
2642 * translation of taskfile registers into
2643 * a sense descriptors, since that's only
2644 * correct for ATA, not ATAPI
2646 ata_gen_passthru_sense(qc);
2648 u8 *scsicmd = cmd->cmnd;
2650 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2651 unsigned long flags;
2654 buf = ata_scsi_rbuf_get(cmd, true, &flags);
2656 /* ATAPI devices typically report zero for their SCSI version,
2657 * and sometimes deviate from the spec WRT response data
2658 * format. If SCSI version is reported as zero like normal,
2659 * then we make the following fixups: 1) Fake MMC-5 version,
2660 * to indicate to the Linux scsi midlayer this is a modern
2661 * device. 2) Ensure response data format / ATAPI information
2662 * are always correct.
2669 ata_scsi_rbuf_put(cmd, true, &flags);
2672 cmd->result = SAM_STAT_GOOD;
2679 * atapi_xlat - Initialize PACKET taskfile
2680 * @qc: command structure to be initialized
2683 * spin_lock_irqsave(host lock)
2686 * Zero on success, non-zero on failure.
2688 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2690 struct scsi_cmnd *scmd = qc->scsicmd;
2691 struct ata_device *dev = qc->dev;
2692 int nodata = (scmd->sc_data_direction == DMA_NONE);
2693 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2694 unsigned int nbytes;
2696 memset(qc->cdb, 0, dev->cdb_len);
2697 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2699 qc->complete_fn = atapi_qc_complete;
2701 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2702 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2703 qc->tf.flags |= ATA_TFLAG_WRITE;
2704 DPRINTK("direction: write\n");
2707 qc->tf.command = ATA_CMD_PACKET;
2708 ata_qc_set_pc_nbytes(qc);
2710 /* check whether ATAPI DMA is safe */
2711 if (!nodata && !using_pio && atapi_check_dma(qc))
2714 /* Some controller variants snoop this value for Packet
2715 * transfers to do state machine and FIFO management. Thus we
2716 * want to set it properly, and for DMA where it is
2717 * effectively meaningless.
2719 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2721 /* Most ATAPI devices which honor transfer chunk size don't
2722 * behave according to the spec when odd chunk size which
2723 * matches the transfer length is specified. If the number of
2724 * bytes to transfer is 2n+1. According to the spec, what
2725 * should happen is to indicate that 2n+1 is going to be
2726 * transferred and transfer 2n+2 bytes where the last byte is
2729 * In practice, this doesn't happen. ATAPI devices first
2730 * indicate and transfer 2n bytes and then indicate and
2731 * transfer 2 bytes where the last byte is padding.
2733 * This inconsistency confuses several controllers which
2734 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2735 * These controllers use actual number of transferred bytes to
2736 * update DMA poitner and transfer of 4n+2 bytes make those
2737 * controller push DMA pointer by 4n+4 bytes because SATA data
2738 * FISes are aligned to 4 bytes. This causes data corruption
2739 * and buffer overrun.
2741 * Always setting nbytes to even number solves this problem
2742 * because then ATAPI devices don't have to split data at 2n
2748 qc->tf.lbam = (nbytes & 0xFF);
2749 qc->tf.lbah = (nbytes >> 8);
2752 qc->tf.protocol = ATAPI_PROT_NODATA;
2754 qc->tf.protocol = ATAPI_PROT_PIO;
2757 qc->tf.protocol = ATAPI_PROT_DMA;
2758 qc->tf.feature |= ATAPI_PKT_DMA;
2760 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2761 (scmd->sc_data_direction != DMA_TO_DEVICE))
2762 /* some SATA bridges need us to indicate data xfer direction */
2763 qc->tf.feature |= ATAPI_DMADIR;
2767 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2768 as ATAPI tape drives don't get this right otherwise */
2772 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2774 if (!sata_pmp_attached(ap)) {
2775 if (likely(devno < ata_link_max_devices(&ap->link)))
2776 return &ap->link.device[devno];
2778 if (likely(devno < ap->nr_pmp_links))
2779 return &ap->pmp_link[devno].device[0];
2785 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2786 const struct scsi_device *scsidev)
2790 /* skip commands not addressed to targets we simulate */
2791 if (!sata_pmp_attached(ap)) {
2792 if (unlikely(scsidev->channel || scsidev->lun))
2794 devno = scsidev->id;
2796 if (unlikely(scsidev->id || scsidev->lun))
2798 devno = scsidev->channel;
2801 return ata_find_dev(ap, devno);
2805 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2806 * @ap: ATA port to which the device is attached
2807 * @scsidev: SCSI device from which we derive the ATA device
2809 * Given various information provided in struct scsi_cmnd,
2810 * map that onto an ATA bus, and using that mapping
2811 * determine which ata_device is associated with the
2812 * SCSI command to be sent.
2815 * spin_lock_irqsave(host lock)
2818 * Associated ATA device, or %NULL if not found.
2820 static struct ata_device *
2821 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2823 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2825 if (unlikely(!dev || !ata_dev_enabled(dev)))
2832 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2833 * @byte1: Byte 1 from pass-thru CDB.
2836 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2839 ata_scsi_map_proto(u8 byte1)
2841 switch((byte1 & 0x1e) >> 1) {
2842 case 3: /* Non-data */
2843 return ATA_PROT_NODATA;
2846 case 10: /* UDMA Data-in */
2847 case 11: /* UDMA Data-Out */
2848 return ATA_PROT_DMA;
2850 case 4: /* PIO Data-in */
2851 case 5: /* PIO Data-out */
2852 return ATA_PROT_PIO;
2854 case 0: /* Hard Reset */
2856 case 8: /* Device Diagnostic */
2857 case 9: /* Device Reset */
2858 case 7: /* DMA Queued */
2859 case 12: /* FPDMA */
2860 case 15: /* Return Response Info */
2861 default: /* Reserved */
2865 return ATA_PROT_UNKNOWN;
2869 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2870 * @qc: command structure to be initialized
2872 * Handles either 12 or 16-byte versions of the CDB.
2875 * Zero on success, non-zero on failure.
2877 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2879 struct ata_taskfile *tf = &(qc->tf);
2880 struct scsi_cmnd *scmd = qc->scsicmd;
2881 struct ata_device *dev = qc->dev;
2882 const u8 *cdb = scmd->cmnd;
2884 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2888 * 12 and 16 byte CDBs use different offsets to
2889 * provide the various register values.
2891 if (cdb[0] == ATA_16) {
2893 * 16-byte CDB - may contain extended commands.
2895 * If that is the case, copy the upper byte register values.
2897 if (cdb[1] & 0x01) {
2898 tf->hob_feature = cdb[3];
2899 tf->hob_nsect = cdb[5];
2900 tf->hob_lbal = cdb[7];
2901 tf->hob_lbam = cdb[9];
2902 tf->hob_lbah = cdb[11];
2903 tf->flags |= ATA_TFLAG_LBA48;
2905 tf->flags &= ~ATA_TFLAG_LBA48;
2908 * Always copy low byte, device and command registers.
2910 tf->feature = cdb[4];
2915 tf->device = cdb[13];
2916 tf->command = cdb[14];
2919 * 12-byte CDB - incapable of extended commands.
2921 tf->flags &= ~ATA_TFLAG_LBA48;
2923 tf->feature = cdb[3];
2928 tf->device = cdb[8];
2929 tf->command = cdb[9];
2932 /* enforce correct master/slave bit */
2933 tf->device = dev->devno ?
2934 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2936 switch (tf->command) {
2937 /* READ/WRITE LONG use a non-standard sect_size */
2938 case ATA_CMD_READ_LONG:
2939 case ATA_CMD_READ_LONG_ONCE:
2940 case ATA_CMD_WRITE_LONG:
2941 case ATA_CMD_WRITE_LONG_ONCE:
2942 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2944 qc->sect_size = scsi_bufflen(scmd);
2947 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2948 case ATA_CMD_CFA_WRITE_NE:
2949 case ATA_CMD_CFA_TRANS_SECT:
2950 case ATA_CMD_CFA_WRITE_MULT_NE:
2951 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2953 case ATA_CMD_READ_EXT:
2954 case ATA_CMD_READ_QUEUED:
2955 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2956 case ATA_CMD_FPDMA_READ:
2957 case ATA_CMD_READ_MULTI:
2958 case ATA_CMD_READ_MULTI_EXT:
2959 case ATA_CMD_PIO_READ:
2960 case ATA_CMD_PIO_READ_EXT:
2961 case ATA_CMD_READ_STREAM_DMA_EXT:
2962 case ATA_CMD_READ_STREAM_EXT:
2963 case ATA_CMD_VERIFY:
2964 case ATA_CMD_VERIFY_EXT:
2966 case ATA_CMD_WRITE_EXT:
2967 case ATA_CMD_WRITE_FUA_EXT:
2968 case ATA_CMD_WRITE_QUEUED:
2969 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
2970 case ATA_CMD_FPDMA_WRITE:
2971 case ATA_CMD_WRITE_MULTI:
2972 case ATA_CMD_WRITE_MULTI_EXT:
2973 case ATA_CMD_WRITE_MULTI_FUA_EXT:
2974 case ATA_CMD_PIO_WRITE:
2975 case ATA_CMD_PIO_WRITE_EXT:
2976 case ATA_CMD_WRITE_STREAM_DMA_EXT:
2977 case ATA_CMD_WRITE_STREAM_EXT:
2978 qc->sect_size = scmd->device->sector_size;
2981 /* Everything else uses 512 byte "sectors" */
2983 qc->sect_size = ATA_SECT_SIZE;
2987 * Set flags so that all registers will be written, pass on
2988 * write indication (used for PIO/DMA setup), result TF is
2989 * copied back and we don't whine too much about its failure.
2991 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2992 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2993 tf->flags |= ATA_TFLAG_WRITE;
2995 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2998 * Set transfer length.
3000 * TODO: find out if we need to do more here to
3001 * cover scatter/gather case.
3003 ata_qc_set_pc_nbytes(qc);
3005 /* We may not issue DMA commands if no DMA mode is set */
3006 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
3009 /* sanity check for pio multi commands */
3010 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
3013 if (is_multi_taskfile(tf)) {
3014 unsigned int multi_count = 1 << (cdb[1] >> 5);
3016 /* compare the passed through multi_count
3017 * with the cached multi_count of libata
3019 if (multi_count != dev->multi_count)
3020 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3025 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3026 * SET_FEATURES - XFER MODE must be preceded/succeeded
3027 * by an update to hardware-specific registers for each
3028 * controller (i.e. the reason for ->set_piomode(),
3029 * ->set_dmamode(), and ->post_set_mode() hooks).
3031 if (tf->command == ATA_CMD_SET_FEATURES &&
3032 tf->feature == SETFEATURES_XFER)
3036 * Filter TPM commands by default. These provide an
3037 * essentially uncontrolled encrypted "back door" between
3038 * applications and the disk. Set libata.allow_tpm=1 if you
3039 * have a real reason for wanting to use them. This ensures
3040 * that installed software cannot easily mess stuff up without
3041 * user intent. DVR type users will probably ship with this enabled
3042 * for movie content management.
3044 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3045 * for this and should do in future but that it is not sufficient as
3046 * DCS is an optional feature set. Thus we also do the software filter
3047 * so that we comply with the TC consortium stated goal that the user
3048 * can turn off TC features of their system.
3050 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
3056 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3057 /* "Invalid field in cdb" */
3061 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3063 struct ata_taskfile *tf = &qc->tf;
3064 struct scsi_cmnd *scmd = qc->scsicmd;
3065 struct ata_device *dev = qc->dev;
3066 const u8 *cdb = scmd->cmnd;
3072 /* we may not issue DMA commands if no DMA mode is set */
3073 if (unlikely(!dev->dma_mode))
3076 if (unlikely(scmd->cmd_len < 16))
3078 scsi_16_lba_len(cdb, &block, &n_block);
3080 /* for now we only support WRITE SAME with the unmap bit set */
3081 if (unlikely(!(cdb[1] & 0x8)))
3085 * WRITE SAME always has a sector sized buffer as payload, this
3086 * should never be a multiple entry S/G list.
3088 if (!scsi_sg_count(scmd))
3091 buf = page_address(sg_page(scsi_sglist(scmd)));
3092 size = ata_set_lba_range_entries(buf, 512, block, n_block);
3094 tf->protocol = ATA_PROT_DMA;
3095 tf->hob_feature = 0;
3096 tf->feature = ATA_DSM_TRIM;
3097 tf->hob_nsect = (size / 512) >> 8;
3098 tf->nsect = size / 512;
3099 tf->command = ATA_CMD_DSM;
3100 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3103 ata_qc_set_pc_nbytes(qc);
3108 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3109 /* "Invalid field in cdb" */
3114 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3115 * @qc: Storage for translated ATA taskfile
3116 * @buf: input buffer
3117 * @len: number of valid bytes in the input buffer
3119 * Prepare a taskfile to modify caching information for the device.
3124 static int ata_mselect_caching(struct ata_queued_cmd *qc,
3125 const u8 *buf, int len)
3127 struct ata_taskfile *tf = &qc->tf;
3128 struct ata_device *dev = qc->dev;
3129 char mpage[CACHE_MPAGE_LEN];
3133 * The first two bytes of def_cache_mpage are a header, so offsets
3134 * in mpage are off by 2 compared to buf. Same for len.
3137 if (len != CACHE_MPAGE_LEN - 2)
3140 wce = buf[0] & (1 << 2);
3143 * Check that read-only bits are not modified.
3145 ata_msense_caching(dev->id, mpage, false);
3146 mpage[2] &= ~(1 << 2);
3148 if (memcmp(mpage + 2, buf, CACHE_MPAGE_LEN - 2) != 0)
3151 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3152 tf->protocol = ATA_PROT_NODATA;
3154 tf->command = ATA_CMD_SET_FEATURES;
3155 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3160 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
3161 * @qc: Storage for translated ATA taskfile
3163 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3164 * Assume this is invoked for direct access devices (e.g. disks) only.
3165 * There should be no block descriptor for other device types.
3168 * spin_lock_irqsave(host lock)
3170 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3172 struct scsi_cmnd *scmd = qc->scsicmd;
3173 const u8 *cdb = scmd->cmnd;
3176 unsigned six_byte, pg_len, hdr_len, bd_len;
3181 six_byte = (cdb[0] == MODE_SELECT);
3183 if (scmd->cmd_len < 5)
3189 if (scmd->cmd_len < 9)
3192 len = (cdb[7] << 8) + cdb[8];
3196 /* We only support PF=1, SP=0. */
3197 if ((cdb[1] & 0x11) != 0x10)
3200 /* Test early for possible overrun. */
3201 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
3202 goto invalid_param_len;
3204 p = page_address(sg_page(scsi_sglist(scmd)));
3206 /* Move past header and block descriptors. */
3208 goto invalid_param_len;
3213 bd_len = (p[6] << 8) + p[7];
3218 goto invalid_param_len;
3219 if (bd_len != 0 && bd_len != 8)
3227 /* Parse both possible formats for the mode page headers. */
3231 goto invalid_param_len;
3234 pg_len = (p[2] << 8) | p[3];
3239 goto invalid_param_len;
3248 * No mode subpages supported (yet) but asking for _all_
3249 * subpages may be valid
3251 if (spg && (spg != ALL_SUB_MPAGES))
3254 goto invalid_param_len;
3258 if (ata_mselect_caching(qc, p, pg_len) < 0)
3262 default: /* invalid page code */
3267 * Only one page has changeable data, so we only support setting one
3276 /* "Invalid field in CDB" */
3277 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
3281 /* "Invalid field in parameter list" */
3282 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x26, 0x0);
3286 /* "Parameter list length error" */
3287 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3291 scmd->result = SAM_STAT_GOOD;
3296 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3298 * @cmd: SCSI command opcode to consider
3300 * Look up the SCSI command given, and determine whether the
3301 * SCSI command is to be translated or simulated.
3304 * Pointer to translation function if possible, %NULL if not.
3307 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3317 return ata_scsi_rw_xlat;
3320 return ata_scsi_write_same_xlat;
3322 case SYNCHRONIZE_CACHE:
3323 if (ata_try_flush_cache(dev))
3324 return ata_scsi_flush_xlat;
3329 return ata_scsi_verify_xlat;
3333 return ata_scsi_pass_thru;
3336 case MODE_SELECT_10:
3337 return ata_scsi_mode_select_xlat;
3341 return ata_scsi_start_stop_xlat;
3348 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3349 * @ap: ATA port to which the command was being sent
3350 * @cmd: SCSI command to dump
3352 * Prints the contents of a SCSI command via printk().
3355 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3356 struct scsi_cmnd *cmd)
3359 struct scsi_device *scsidev = cmd->device;
3360 u8 *scsicmd = cmd->cmnd;
3362 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
3364 scsidev->channel, scsidev->id, scsidev->lun,
3365 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3366 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3371 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
3372 struct ata_device *dev)
3374 u8 scsi_op = scmd->cmnd[0];
3375 ata_xlat_func_t xlat_func;
3378 if (dev->class == ATA_DEV_ATA) {
3379 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3382 xlat_func = ata_get_xlat_func(dev, scsi_op);
3384 if (unlikely(!scmd->cmd_len))
3388 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3389 /* relay SCSI command to ATAPI device */
3390 int len = COMMAND_SIZE(scsi_op);
3391 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
3394 xlat_func = atapi_xlat;
3396 /* ATA_16 passthru, treat as an ATA command */
3397 if (unlikely(scmd->cmd_len > 16))
3400 xlat_func = ata_get_xlat_func(dev, scsi_op);
3405 rc = ata_scsi_translate(dev, scmd, xlat_func);
3407 ata_scsi_simulate(dev, scmd);
3412 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3413 scmd->cmd_len, scsi_op, dev->cdb_len);
3414 scmd->result = DID_ERROR << 16;
3415 scmd->scsi_done(scmd);
3420 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3421 * @shost: SCSI host of command to be sent
3422 * @cmd: SCSI command to be sent
3424 * In some cases, this function translates SCSI commands into
3425 * ATA taskfiles, and queues the taskfiles to be sent to
3426 * hardware. In other cases, this function simulates a
3427 * SCSI device by evaluating and responding to certain
3428 * SCSI commands. This creates the overall effect of
3429 * ATA and ATAPI devices appearing as SCSI devices.
3435 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3438 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
3440 struct ata_port *ap;
3441 struct ata_device *dev;
3442 struct scsi_device *scsidev = cmd->device;
3444 unsigned long irq_flags;
3446 ap = ata_shost_to_port(shost);
3448 spin_lock_irqsave(ap->lock, irq_flags);
3450 ata_scsi_dump_cdb(ap, cmd);
3452 dev = ata_scsi_find_dev(ap, scsidev);
3454 rc = __ata_scsi_queuecmd(cmd, dev);
3456 cmd->result = (DID_BAD_TARGET << 16);
3457 cmd->scsi_done(cmd);
3460 spin_unlock_irqrestore(ap->lock, irq_flags);
3466 * ata_scsi_simulate - simulate SCSI command on ATA device
3467 * @dev: the target device
3468 * @cmd: SCSI command being sent to device.
3470 * Interprets and directly executes a select list of SCSI commands
3471 * that can be handled internally.
3474 * spin_lock_irqsave(host lock)
3477 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
3479 struct ata_scsi_args args;
3480 const u8 *scsicmd = cmd->cmnd;
3486 args.done = cmd->scsi_done;
3488 switch(scsicmd[0]) {
3489 /* TODO: worth improving? */
3491 ata_scsi_invalid_field(cmd);
3495 if (scsicmd[1] & 2) /* is CmdDt set? */
3496 ata_scsi_invalid_field(cmd);
3497 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3498 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3499 else switch (scsicmd[2]) {
3501 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
3504 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
3507 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
3510 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3513 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3516 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3519 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
3522 ata_scsi_invalid_field(cmd);
3529 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3533 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3536 case SERVICE_ACTION_IN:
3537 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3538 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3540 ata_scsi_invalid_field(cmd);
3544 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3548 ata_scsi_set_sense(cmd, 0, 0, 0);
3549 cmd->result = (DRIVER_SENSE << 24);
3550 cmd->scsi_done(cmd);
3553 /* if we reach this, then writeback caching is disabled,
3554 * turning this into a no-op.
3556 case SYNCHRONIZE_CACHE:
3559 /* no-op's, complete with success */
3563 case TEST_UNIT_READY:
3564 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3567 case SEND_DIAGNOSTIC:
3568 tmp8 = scsicmd[1] & ~(1 << 3);
3569 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3570 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3572 ata_scsi_invalid_field(cmd);
3575 /* all other commands */
3577 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3578 /* "Invalid command operation code" */
3579 cmd->scsi_done(cmd);
3584 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3588 for (i = 0; i < host->n_ports; i++) {
3589 struct ata_port *ap = host->ports[i];
3590 struct Scsi_Host *shost;
3593 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3597 shost->eh_noresume = 1;
3598 *(struct ata_port **)&shost->hostdata[0] = ap;
3599 ap->scsi_host = shost;
3601 shost->transportt = ata_scsi_transport_template;
3602 shost->unique_id = ap->print_id;
3605 shost->max_channel = 1;
3606 shost->max_cmd_len = 16;
3608 /* Schedule policy is determined by ->qc_defer()
3609 * callback and it needs to see every deferred qc.
3610 * Set host_blocked to 1 to prevent SCSI midlayer from
3611 * automatically deferring requests.
3613 shost->max_host_blocked = 1;
3615 rc = scsi_add_host_with_dma(ap->scsi_host,
3616 &ap->tdev, ap->host->dev);
3624 scsi_host_put(host->ports[i]->scsi_host);
3627 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3629 scsi_remove_host(shost);
3630 scsi_host_put(shost);
3635 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3638 struct ata_device *last_failed_dev = NULL;
3639 struct ata_link *link;
3640 struct ata_device *dev;
3643 ata_for_each_link(link, ap, EDGE) {
3644 ata_for_each_dev(dev, link, ENABLED) {
3645 struct scsi_device *sdev;
3646 int channel = 0, id = 0;
3651 if (ata_is_host_link(link))
3654 channel = link->pmp;
3656 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3658 if (!IS_ERR(sdev)) {
3660 scsi_device_put(sdev);
3668 /* If we scanned while EH was in progress or allocation
3669 * failure occurred, scan would have failed silently. Check
3670 * whether all devices are attached.
3672 ata_for_each_link(link, ap, EDGE) {
3673 ata_for_each_dev(dev, link, ENABLED) {
3682 /* we're missing some SCSI devices */
3684 /* If caller requested synchrnous scan && we've made
3685 * any progress, sleep briefly and repeat.
3687 if (dev != last_failed_dev) {
3689 last_failed_dev = dev;
3693 /* We might be failing to detect boot device, give it
3694 * a few more chances.
3702 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
3705 queue_delayed_work(system_long_wq, &ap->hotplug_task,
3706 round_jiffies_relative(HZ));
3710 * ata_scsi_offline_dev - offline attached SCSI device
3711 * @dev: ATA device to offline attached SCSI device for
3713 * This function is called from ata_eh_hotplug() and responsible
3714 * for taking the SCSI device attached to @dev offline. This
3715 * function is called with host lock which protects dev->sdev
3719 * spin_lock_irqsave(host lock)
3722 * 1 if attached SCSI device exists, 0 otherwise.
3724 int ata_scsi_offline_dev(struct ata_device *dev)
3727 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3734 * ata_scsi_remove_dev - remove attached SCSI device
3735 * @dev: ATA device to remove attached SCSI device for
3737 * This function is called from ata_eh_scsi_hotplug() and
3738 * responsible for removing the SCSI device attached to @dev.
3741 * Kernel thread context (may sleep).
3743 static void ata_scsi_remove_dev(struct ata_device *dev)
3745 struct ata_port *ap = dev->link->ap;
3746 struct scsi_device *sdev;
3747 unsigned long flags;
3749 /* Alas, we need to grab scan_mutex to ensure SCSI device
3750 * state doesn't change underneath us and thus
3751 * scsi_device_get() always succeeds. The mutex locking can
3752 * be removed if there is __scsi_device_get() interface which
3753 * increments reference counts regardless of device state.
3755 mutex_lock(&ap->scsi_host->scan_mutex);
3756 spin_lock_irqsave(ap->lock, flags);
3758 ata_acpi_unbind(dev);
3760 /* clearing dev->sdev is protected by host lock */
3765 /* If user initiated unplug races with us, sdev can go
3766 * away underneath us after the host lock and
3767 * scan_mutex are released. Hold onto it.
3769 if (scsi_device_get(sdev) == 0) {
3770 /* The following ensures the attached sdev is
3771 * offline on return from ata_scsi_offline_dev()
3772 * regardless it wins or loses the race
3773 * against this function.
3775 scsi_device_set_state(sdev, SDEV_OFFLINE);
3782 spin_unlock_irqrestore(ap->lock, flags);
3783 mutex_unlock(&ap->scsi_host->scan_mutex);
3786 ata_dev_info(dev, "detaching (SCSI %s)\n",
3787 dev_name(&sdev->sdev_gendev));
3789 scsi_remove_device(sdev);
3790 scsi_device_put(sdev);
3794 static void ata_scsi_handle_link_detach(struct ata_link *link)
3796 struct ata_port *ap = link->ap;
3797 struct ata_device *dev;
3799 ata_for_each_dev(dev, link, ALL) {
3800 unsigned long flags;
3802 if (!(dev->flags & ATA_DFLAG_DETACHED))
3805 spin_lock_irqsave(ap->lock, flags);
3806 dev->flags &= ~ATA_DFLAG_DETACHED;
3807 spin_unlock_irqrestore(ap->lock, flags);
3809 ata_scsi_remove_dev(dev);
3814 * ata_scsi_media_change_notify - send media change event
3815 * @dev: Pointer to the disk device with media change event
3817 * Tell the block layer to send a media change notification
3821 * spin_lock_irqsave(host lock)
3823 void ata_scsi_media_change_notify(struct ata_device *dev)
3826 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3831 * ata_scsi_hotplug - SCSI part of hotplug
3832 * @work: Pointer to ATA port to perform SCSI hotplug on
3834 * Perform SCSI part of hotplug. It's executed from a separate
3835 * workqueue after EH completes. This is necessary because SCSI
3836 * hot plugging requires working EH and hot unplugging is
3837 * synchronized with hot plugging with a mutex.
3840 * Kernel thread context (may sleep).
3842 void ata_scsi_hotplug(struct work_struct *work)
3844 struct ata_port *ap =
3845 container_of(work, struct ata_port, hotplug_task.work);
3848 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3849 DPRINTK("ENTER/EXIT - unloading\n");
3854 mutex_lock(&ap->scsi_scan_mutex);
3856 /* Unplug detached devices. We cannot use link iterator here
3857 * because PMP links have to be scanned even if PMP is
3858 * currently not attached. Iterate manually.
3860 ata_scsi_handle_link_detach(&ap->link);
3862 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3863 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3865 /* scan for new ones */
3866 ata_scsi_scan_host(ap, 0);
3868 mutex_unlock(&ap->scsi_scan_mutex);
3873 * ata_scsi_user_scan - indication for user-initiated bus scan
3874 * @shost: SCSI host to scan
3875 * @channel: Channel to scan
3879 * This function is called when user explicitly requests bus
3880 * scan. Set probe pending flag and invoke EH.
3883 * SCSI layer (we don't care)
3888 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3889 unsigned int id, unsigned int lun)
3891 struct ata_port *ap = ata_shost_to_port(shost);
3892 unsigned long flags;
3895 if (!ap->ops->error_handler)
3898 if (lun != SCAN_WILD_CARD && lun)
3901 if (!sata_pmp_attached(ap)) {
3902 if (channel != SCAN_WILD_CARD && channel)
3906 if (id != SCAN_WILD_CARD && id)
3911 spin_lock_irqsave(ap->lock, flags);
3913 if (devno == SCAN_WILD_CARD) {
3914 struct ata_link *link;
3916 ata_for_each_link(link, ap, EDGE) {
3917 struct ata_eh_info *ehi = &link->eh_info;
3918 ehi->probe_mask |= ATA_ALL_DEVICES;
3919 ehi->action |= ATA_EH_RESET;
3922 struct ata_device *dev = ata_find_dev(ap, devno);
3925 struct ata_eh_info *ehi = &dev->link->eh_info;
3926 ehi->probe_mask |= 1 << dev->devno;
3927 ehi->action |= ATA_EH_RESET;
3933 ata_port_schedule_eh(ap);
3934 spin_unlock_irqrestore(ap->lock, flags);
3935 ata_port_wait_eh(ap);
3937 spin_unlock_irqrestore(ap->lock, flags);
3943 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3944 * @work: Pointer to ATA port to perform scsi_rescan_device()
3946 * After ATA pass thru (SAT) commands are executed successfully,
3947 * libata need to propagate the changes to SCSI layer.
3950 * Kernel thread context (may sleep).
3952 void ata_scsi_dev_rescan(struct work_struct *work)
3954 struct ata_port *ap =
3955 container_of(work, struct ata_port, scsi_rescan_task);
3956 struct ata_link *link;
3957 struct ata_device *dev;
3958 unsigned long flags;
3960 mutex_lock(&ap->scsi_scan_mutex);
3961 spin_lock_irqsave(ap->lock, flags);
3963 ata_for_each_link(link, ap, EDGE) {
3964 ata_for_each_dev(dev, link, ENABLED) {
3965 struct scsi_device *sdev = dev->sdev;
3969 if (scsi_device_get(sdev))
3972 spin_unlock_irqrestore(ap->lock, flags);
3973 scsi_rescan_device(&(sdev->sdev_gendev));
3974 scsi_device_put(sdev);
3975 spin_lock_irqsave(ap->lock, flags);
3979 spin_unlock_irqrestore(ap->lock, flags);
3980 mutex_unlock(&ap->scsi_scan_mutex);
3984 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3985 * @host: ATA host container for all SAS ports
3986 * @port_info: Information from low-level host driver
3987 * @shost: SCSI host that the scsi device is attached to
3990 * PCI/etc. bus probe sem.
3993 * ata_port pointer on success / NULL on failure.
3996 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3997 struct ata_port_info *port_info,
3998 struct Scsi_Host *shost)
4000 struct ata_port *ap;
4002 ap = ata_port_alloc(host);
4007 ap->lock = &host->lock;
4008 ap->pio_mask = port_info->pio_mask;
4009 ap->mwdma_mask = port_info->mwdma_mask;
4010 ap->udma_mask = port_info->udma_mask;
4011 ap->flags |= port_info->flags;
4012 ap->ops = port_info->port_ops;
4013 ap->cbl = ATA_CBL_SATA;
4017 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
4020 * ata_sas_port_start - Set port up for dma.
4021 * @ap: Port to initialize
4023 * Called just after data structures for each port are
4026 * May be used as the port_start() entry in ata_port_operations.
4029 * Inherited from caller.
4031 int ata_sas_port_start(struct ata_port *ap)
4034 * the port is marked as frozen at allocation time, but if we don't
4035 * have new eh, we won't thaw it
4037 if (!ap->ops->error_handler)
4038 ap->pflags &= ~ATA_PFLAG_FROZEN;
4041 EXPORT_SYMBOL_GPL(ata_sas_port_start);
4044 * ata_port_stop - Undo ata_sas_port_start()
4045 * @ap: Port to shut down
4047 * May be used as the port_stop() entry in ata_port_operations.
4050 * Inherited from caller.
4053 void ata_sas_port_stop(struct ata_port *ap)
4056 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
4059 * ata_sas_async_probe - simply schedule probing and return
4060 * @ap: Port to probe
4062 * For batch scheduling of probe for sas attached ata devices, assumes
4063 * the port has already been through ata_sas_port_init()
4065 void ata_sas_async_probe(struct ata_port *ap)
4067 __ata_port_probe(ap);
4069 EXPORT_SYMBOL_GPL(ata_sas_async_probe);
4071 int ata_sas_sync_probe(struct ata_port *ap)
4073 return ata_port_probe(ap);
4075 EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
4079 * ata_sas_port_init - Initialize a SATA device
4080 * @ap: SATA port to initialize
4083 * PCI/etc. bus probe sem.
4086 * Zero on success, non-zero on error.
4089 int ata_sas_port_init(struct ata_port *ap)
4091 int rc = ap->ops->port_start(ap);
4095 ap->print_id = atomic_inc_return(&ata_print_id);
4098 EXPORT_SYMBOL_GPL(ata_sas_port_init);
4101 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
4102 * @ap: SATA port to destroy
4106 void ata_sas_port_destroy(struct ata_port *ap)
4108 if (ap->ops->port_stop)
4109 ap->ops->port_stop(ap);
4112 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
4115 * ata_sas_slave_configure - Default slave_config routine for libata devices
4116 * @sdev: SCSI device to configure
4117 * @ap: ATA port to which SCSI device is attached
4123 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
4125 ata_scsi_sdev_config(sdev);
4126 ata_scsi_dev_config(sdev, ap->link.device);
4129 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
4132 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
4133 * @cmd: SCSI command to be sent
4134 * @ap: ATA port to which the command is being sent
4137 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4141 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
4145 ata_scsi_dump_cdb(ap, cmd);
4147 if (likely(ata_dev_enabled(ap->link.device)))
4148 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
4150 cmd->result = (DID_BAD_TARGET << 16);
4151 cmd->scsi_done(cmd);
4155 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);