2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Tejun Heo <tj@kernel.org>
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 == RECOVERED_ERROR &&
536 sshdr.asc == 0 && sshdr.ascq == 0x1d)
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 == RECOVERED_ERROR &&
622 sshdr.asc == 0 && sshdr.ascq == 0x1d)
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
852 /* Abort: 0x04 is not translated here, see below */
853 /* Media change request */
854 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
856 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, // ID not found Logical address out of range
858 {0x20, UNIT_ATTENTION, 0x28, 0x00}, // Media Changed Not ready to ready change, medium may have changed
860 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
861 /* BBD - block marked bad */
862 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
863 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
865 static const unsigned char stat_table[][4] = {
866 /* Must be first because BUSY means no other bits valid */
867 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
868 {0x20, HARDWARE_ERROR, 0x44, 0x00}, // Device fault, internal target failure
869 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
870 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
871 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
875 * Is this an error we can process/parse
877 if (drv_stat & ATA_BUSY) {
878 drv_err = 0; /* Ignore the err bits, they're invalid */
882 /* Look for drv_err */
883 for (i = 0; sense_table[i][0] != 0xFF; i++) {
884 /* Look for best matches first */
885 if ((sense_table[i][0] & drv_err) ==
887 *sk = sense_table[i][1];
888 *asc = sense_table[i][2];
889 *ascq = sense_table[i][3];
896 * Fall back to interpreting status bits. Note that if the drv_err
897 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
898 * is not descriptive enough.
900 for (i = 0; stat_table[i][0] != 0xFF; i++) {
901 if (stat_table[i][0] & drv_stat) {
902 *sk = stat_table[i][1];
903 *asc = stat_table[i][2];
904 *ascq = stat_table[i][3];
910 * We need a sensible error return here, which is tricky, and one
911 * that won't cause people to do things like return a disk wrongly.
913 *sk = ABORTED_COMMAND;
919 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
920 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
921 id, drv_stat, drv_err, *sk, *asc, *ascq);
926 * ata_gen_passthru_sense - Generate check condition sense block.
927 * @qc: Command that completed.
929 * This function is specific to the ATA descriptor format sense
930 * block specified for the ATA pass through commands. Regardless
931 * of whether the command errored or not, return a sense
932 * block. Copy all controller registers into the sense
933 * block. If there was no error, we get the request from an ATA
934 * passthrough command, so we use the following sense data:
935 * sk = RECOVERED ERROR
936 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
942 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
944 struct scsi_cmnd *cmd = qc->scsicmd;
945 struct ata_taskfile *tf = &qc->result_tf;
946 unsigned char *sb = cmd->sense_buffer;
947 unsigned char *desc = sb + 8;
948 int verbose = qc->ap->ops->error_handler == NULL;
950 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
952 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
955 * Use ata_to_sense_error() to map status register bits
956 * onto sense key, asc & ascq.
959 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
960 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
961 &sb[1], &sb[2], &sb[3], verbose);
964 sb[1] = RECOVERED_ERROR;
970 * Sense data is current and format is descriptor.
976 /* set length of additional sense data */
981 * Copy registers into sense buffer.
984 desc[3] = tf->feature; /* == error reg */
989 desc[12] = tf->device;
990 desc[13] = tf->command; /* == status reg */
993 * Fill in Extend bit, and the high order bytes
996 if (tf->flags & ATA_TFLAG_LBA48) {
998 desc[4] = tf->hob_nsect;
999 desc[6] = tf->hob_lbal;
1000 desc[8] = tf->hob_lbam;
1001 desc[10] = tf->hob_lbah;
1006 * ata_gen_ata_sense - generate a SCSI fixed sense block
1007 * @qc: Command that we are erroring out
1009 * Generate sense block for a failed ATA command @qc. Descriptor
1010 * format is used to accommodate LBA48 block address.
1015 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1017 struct ata_device *dev = qc->dev;
1018 struct scsi_cmnd *cmd = qc->scsicmd;
1019 struct ata_taskfile *tf = &qc->result_tf;
1020 unsigned char *sb = cmd->sense_buffer;
1021 unsigned char *desc = sb + 8;
1022 int verbose = qc->ap->ops->error_handler == NULL;
1025 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1027 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1029 /* sense data is current and format is descriptor */
1032 /* Use ata_to_sense_error() to map status register bits
1033 * onto sense key, asc & ascq.
1036 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1037 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1038 &sb[1], &sb[2], &sb[3], verbose);
1042 block = ata_tf_read_block(&qc->result_tf, dev);
1044 /* information sense data descriptor */
1049 desc[2] |= 0x80; /* valid */
1050 desc[6] = block >> 40;
1051 desc[7] = block >> 32;
1052 desc[8] = block >> 24;
1053 desc[9] = block >> 16;
1054 desc[10] = block >> 8;
1058 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1060 sdev->use_10_for_rw = 1;
1061 sdev->use_10_for_ms = 1;
1062 sdev->no_report_opcodes = 1;
1063 sdev->no_write_same = 1;
1065 /* Schedule policy is determined by ->qc_defer() callback and
1066 * it needs to see every deferred qc. Set dev_blocked to 1 to
1067 * prevent SCSI midlayer from automatically deferring
1070 sdev->max_device_blocked = 1;
1074 * atapi_drain_needed - Check whether data transfer may overflow
1075 * @rq: request to be checked
1077 * ATAPI commands which transfer variable length data to host
1078 * might overflow due to application error or hardare bug. This
1079 * function checks whether overflow should be drained and ignored
1086 * 1 if ; otherwise, 0.
1088 static int atapi_drain_needed(struct request *rq)
1090 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
1093 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
1096 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1099 static int ata_scsi_dev_config(struct scsi_device *sdev,
1100 struct ata_device *dev)
1102 struct request_queue *q = sdev->request_queue;
1104 if (!ata_id_has_unload(dev->id))
1105 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1107 /* configure max sectors */
1108 blk_queue_max_hw_sectors(q, dev->max_sectors);
1110 if (dev->class == ATA_DEV_ATAPI) {
1113 sdev->sector_size = ATA_SECT_SIZE;
1115 /* set DMA padding */
1116 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1118 /* configure draining */
1119 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1121 ata_dev_err(dev, "drain buffer allocation failed\n");
1125 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1127 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1128 sdev->manage_start_stop = 1;
1132 * ata_pio_sectors() expects buffer for each sector to not cross
1133 * page boundary. Enforce it by requiring buffers to be sector
1134 * aligned, which works iff sector_size is not larger than
1135 * PAGE_SIZE. ATAPI devices also need the alignment as
1136 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1138 if (sdev->sector_size > PAGE_SIZE)
1140 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1143 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1145 if (dev->flags & ATA_DFLAG_AN)
1146 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1148 if (dev->flags & ATA_DFLAG_NCQ) {
1151 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1152 depth = min(ATA_MAX_QUEUE - 1, depth);
1153 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
1156 blk_queue_flush_queueable(q, false);
1163 * ata_scsi_slave_config - Set SCSI device attributes
1164 * @sdev: SCSI device to examine
1166 * This is called before we actually start reading
1167 * and writing to the device, to configure certain
1168 * SCSI mid-layer behaviors.
1171 * Defined by SCSI layer. We don't really care.
1174 int ata_scsi_slave_config(struct scsi_device *sdev)
1176 struct ata_port *ap = ata_shost_to_port(sdev->host);
1177 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1180 ata_scsi_sdev_config(sdev);
1183 rc = ata_scsi_dev_config(sdev, dev);
1189 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1190 * @sdev: SCSI device to be destroyed
1192 * @sdev is about to be destroyed for hot/warm unplugging. If
1193 * this unplugging was initiated by libata as indicated by NULL
1194 * dev->sdev, this function doesn't have to do anything.
1195 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1196 * Clear dev->sdev, schedule the device for ATA detach and invoke
1200 * Defined by SCSI layer. We don't really care.
1202 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1204 struct ata_port *ap = ata_shost_to_port(sdev->host);
1205 struct request_queue *q = sdev->request_queue;
1206 unsigned long flags;
1207 struct ata_device *dev;
1209 if (!ap->ops->error_handler)
1212 spin_lock_irqsave(ap->lock, flags);
1213 dev = __ata_scsi_find_dev(ap, sdev);
1214 if (dev && dev->sdev) {
1215 /* SCSI device already in CANCEL state, no need to offline it */
1217 dev->flags |= ATA_DFLAG_DETACH;
1218 ata_port_schedule_eh(ap);
1220 spin_unlock_irqrestore(ap->lock, flags);
1222 kfree(q->dma_drain_buffer);
1223 q->dma_drain_buffer = NULL;
1224 q->dma_drain_size = 0;
1228 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1229 * @ap: ATA port to which the device change the queue depth
1230 * @sdev: SCSI device to configure queue depth for
1231 * @queue_depth: new queue depth
1232 * @reason: calling context
1234 * libsas and libata have different approaches for associating a sdev to
1238 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1239 int queue_depth, int reason)
1241 struct ata_device *dev;
1242 unsigned long flags;
1244 if (reason != SCSI_QDEPTH_DEFAULT)
1247 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1248 return sdev->queue_depth;
1250 dev = ata_scsi_find_dev(ap, sdev);
1251 if (!dev || !ata_dev_enabled(dev))
1252 return sdev->queue_depth;
1255 spin_lock_irqsave(ap->lock, flags);
1256 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1257 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1258 dev->flags |= ATA_DFLAG_NCQ_OFF;
1261 spin_unlock_irqrestore(ap->lock, flags);
1263 /* limit and apply queue depth */
1264 queue_depth = min(queue_depth, sdev->host->can_queue);
1265 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1266 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1268 if (sdev->queue_depth == queue_depth)
1271 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
1276 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1277 * @sdev: SCSI device to configure queue depth for
1278 * @queue_depth: new queue depth
1279 * @reason: calling context
1281 * This is libata standard hostt->change_queue_depth callback.
1282 * SCSI will call into this callback when user tries to set queue
1286 * SCSI layer (we don't care)
1289 * Newly configured queue depth.
1291 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth,
1294 struct ata_port *ap = ata_shost_to_port(sdev->host);
1296 return __ata_change_queue_depth(ap, sdev, queue_depth, reason);
1300 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1301 * @qc: Storage for translated ATA taskfile
1303 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1304 * (to start). Perhaps these commands should be preceded by
1305 * CHECK POWER MODE to see what power mode the device is already in.
1306 * [See SAT revision 5 at www.t10.org]
1309 * spin_lock_irqsave(host lock)
1312 * Zero on success, non-zero on error.
1314 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1316 struct scsi_cmnd *scmd = qc->scsicmd;
1317 struct ata_taskfile *tf = &qc->tf;
1318 const u8 *cdb = scmd->cmnd;
1320 if (scmd->cmd_len < 5)
1323 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1324 tf->protocol = ATA_PROT_NODATA;
1326 ; /* ignore IMMED bit, violates sat-r05 */
1329 goto invalid_fld; /* LOEJ bit set not supported */
1330 if (((cdb[4] >> 4) & 0xf) != 0)
1331 goto invalid_fld; /* power conditions not supported */
1334 tf->nsect = 1; /* 1 sector, lba=0 */
1336 if (qc->dev->flags & ATA_DFLAG_LBA) {
1337 tf->flags |= ATA_TFLAG_LBA;
1342 tf->device |= ATA_LBA;
1345 tf->lbal = 0x1; /* sect */
1346 tf->lbam = 0x0; /* cyl low */
1347 tf->lbah = 0x0; /* cyl high */
1350 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1352 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1353 * or S5) causing some drives to spin up and down again.
1355 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1356 system_state == SYSTEM_POWER_OFF)
1359 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1360 system_entering_hibernation())
1363 /* Issue ATA STANDBY IMMEDIATE command */
1364 tf->command = ATA_CMD_STANDBYNOW1;
1368 * Standby and Idle condition timers could be implemented but that
1369 * would require libata to implement the Power condition mode page
1370 * and allow the user to change it. Changing mode pages requires
1371 * MODE SELECT to be implemented.
1377 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1378 /* "Invalid field in cbd" */
1381 scmd->result = SAM_STAT_GOOD;
1387 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1388 * @qc: Storage for translated ATA taskfile
1390 * Sets up an ATA taskfile to issue FLUSH CACHE or
1394 * spin_lock_irqsave(host lock)
1397 * Zero on success, non-zero on error.
1399 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1401 struct ata_taskfile *tf = &qc->tf;
1403 tf->flags |= ATA_TFLAG_DEVICE;
1404 tf->protocol = ATA_PROT_NODATA;
1406 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1407 tf->command = ATA_CMD_FLUSH_EXT;
1409 tf->command = ATA_CMD_FLUSH;
1411 /* flush is critical for IO integrity, consider it an IO command */
1412 qc->flags |= ATA_QCFLAG_IO;
1418 * scsi_6_lba_len - Get LBA and transfer length
1419 * @cdb: SCSI command to translate
1421 * Calculate LBA and transfer length for 6-byte commands.
1425 * @plen: the transfer length
1427 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1432 VPRINTK("six-byte command\n");
1434 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1435 lba |= ((u64)cdb[2]) << 8;
1436 lba |= ((u64)cdb[3]);
1445 * scsi_10_lba_len - Get LBA and transfer length
1446 * @cdb: SCSI command to translate
1448 * Calculate LBA and transfer length for 10-byte commands.
1452 * @plen: the transfer length
1454 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1459 VPRINTK("ten-byte command\n");
1461 lba |= ((u64)cdb[2]) << 24;
1462 lba |= ((u64)cdb[3]) << 16;
1463 lba |= ((u64)cdb[4]) << 8;
1464 lba |= ((u64)cdb[5]);
1466 len |= ((u32)cdb[7]) << 8;
1467 len |= ((u32)cdb[8]);
1474 * scsi_16_lba_len - Get LBA and transfer length
1475 * @cdb: SCSI command to translate
1477 * Calculate LBA and transfer length for 16-byte commands.
1481 * @plen: the transfer length
1483 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1488 VPRINTK("sixteen-byte command\n");
1490 lba |= ((u64)cdb[2]) << 56;
1491 lba |= ((u64)cdb[3]) << 48;
1492 lba |= ((u64)cdb[4]) << 40;
1493 lba |= ((u64)cdb[5]) << 32;
1494 lba |= ((u64)cdb[6]) << 24;
1495 lba |= ((u64)cdb[7]) << 16;
1496 lba |= ((u64)cdb[8]) << 8;
1497 lba |= ((u64)cdb[9]);
1499 len |= ((u32)cdb[10]) << 24;
1500 len |= ((u32)cdb[11]) << 16;
1501 len |= ((u32)cdb[12]) << 8;
1502 len |= ((u32)cdb[13]);
1509 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1510 * @qc: Storage for translated ATA taskfile
1512 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1515 * spin_lock_irqsave(host lock)
1518 * Zero on success, non-zero on error.
1520 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1522 struct scsi_cmnd *scmd = qc->scsicmd;
1523 struct ata_taskfile *tf = &qc->tf;
1524 struct ata_device *dev = qc->dev;
1525 u64 dev_sectors = qc->dev->n_sectors;
1526 const u8 *cdb = scmd->cmnd;
1530 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1531 tf->protocol = ATA_PROT_NODATA;
1533 if (cdb[0] == VERIFY) {
1534 if (scmd->cmd_len < 10)
1536 scsi_10_lba_len(cdb, &block, &n_block);
1537 } else if (cdb[0] == VERIFY_16) {
1538 if (scmd->cmd_len < 16)
1540 scsi_16_lba_len(cdb, &block, &n_block);
1546 if (block >= dev_sectors)
1548 if ((block + n_block) > dev_sectors)
1551 if (dev->flags & ATA_DFLAG_LBA) {
1552 tf->flags |= ATA_TFLAG_LBA;
1554 if (lba_28_ok(block, n_block)) {
1556 tf->command = ATA_CMD_VERIFY;
1557 tf->device |= (block >> 24) & 0xf;
1558 } else if (lba_48_ok(block, n_block)) {
1559 if (!(dev->flags & ATA_DFLAG_LBA48))
1563 tf->flags |= ATA_TFLAG_LBA48;
1564 tf->command = ATA_CMD_VERIFY_EXT;
1566 tf->hob_nsect = (n_block >> 8) & 0xff;
1568 tf->hob_lbah = (block >> 40) & 0xff;
1569 tf->hob_lbam = (block >> 32) & 0xff;
1570 tf->hob_lbal = (block >> 24) & 0xff;
1572 /* request too large even for LBA48 */
1575 tf->nsect = n_block & 0xff;
1577 tf->lbah = (block >> 16) & 0xff;
1578 tf->lbam = (block >> 8) & 0xff;
1579 tf->lbal = block & 0xff;
1581 tf->device |= ATA_LBA;
1584 u32 sect, head, cyl, track;
1586 if (!lba_28_ok(block, n_block))
1589 /* Convert LBA to CHS */
1590 track = (u32)block / dev->sectors;
1591 cyl = track / dev->heads;
1592 head = track % dev->heads;
1593 sect = (u32)block % dev->sectors + 1;
1595 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1596 (u32)block, track, cyl, head, sect);
1598 /* Check whether the converted CHS can fit.
1602 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1605 tf->command = ATA_CMD_VERIFY;
1606 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1609 tf->lbah = cyl >> 8;
1616 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1617 /* "Invalid field in cbd" */
1621 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1622 /* "Logical Block Address out of range" */
1626 scmd->result = SAM_STAT_GOOD;
1631 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1632 * @qc: Storage for translated ATA taskfile
1634 * Converts any of six SCSI read/write commands into the
1635 * ATA counterpart, including starting sector (LBA),
1636 * sector count, and taking into account the device's LBA48
1639 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1640 * %WRITE_16 are currently supported.
1643 * spin_lock_irqsave(host lock)
1646 * Zero on success, non-zero on error.
1648 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1650 struct scsi_cmnd *scmd = qc->scsicmd;
1651 const u8 *cdb = scmd->cmnd;
1652 unsigned int tf_flags = 0;
1657 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1658 tf_flags |= ATA_TFLAG_WRITE;
1660 /* Calculate the SCSI LBA, transfer length and FUA. */
1664 if (unlikely(scmd->cmd_len < 10))
1666 scsi_10_lba_len(cdb, &block, &n_block);
1667 if (cdb[1] & (1 << 3))
1668 tf_flags |= ATA_TFLAG_FUA;
1672 if (unlikely(scmd->cmd_len < 6))
1674 scsi_6_lba_len(cdb, &block, &n_block);
1676 /* for 6-byte r/w commands, transfer length 0
1677 * means 256 blocks of data, not 0 block.
1684 if (unlikely(scmd->cmd_len < 16))
1686 scsi_16_lba_len(cdb, &block, &n_block);
1687 if (cdb[1] & (1 << 3))
1688 tf_flags |= ATA_TFLAG_FUA;
1691 DPRINTK("no-byte command\n");
1695 /* Check and compose ATA command */
1697 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1698 * length 0 means transfer 0 block of data.
1699 * However, for ATA R/W commands, sector count 0 means
1700 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1702 * WARNING: one or two older ATA drives treat 0 as 0...
1706 qc->flags |= ATA_QCFLAG_IO;
1707 qc->nbytes = n_block * scmd->device->sector_size;
1709 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1711 if (likely(rc == 0))
1716 /* treat all other errors as -EINVAL, fall through */
1718 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1719 /* "Invalid field in cbd" */
1723 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1724 /* "Logical Block Address out of range" */
1728 scmd->result = SAM_STAT_GOOD;
1732 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1734 struct ata_port *ap = qc->ap;
1735 struct scsi_cmnd *cmd = qc->scsicmd;
1736 u8 *cdb = cmd->cmnd;
1737 int need_sense = (qc->err_mask != 0);
1739 /* For ATA pass thru (SAT) commands, generate a sense block if
1740 * user mandated it or if there's an error. Note that if we
1741 * generate because the user forced us to [CK_COND =1], a check
1742 * condition is generated and the ATA register values are returned
1743 * whether the command completed successfully or not. If there
1744 * was no error, we use the following sense data:
1745 * sk = RECOVERED ERROR
1746 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1748 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1749 ((cdb[2] & 0x20) || need_sense)) {
1750 ata_gen_passthru_sense(qc);
1753 cmd->result = SAM_STAT_GOOD;
1755 /* TODO: decide which descriptor format to use
1756 * for 48b LBA devices and call that here
1757 * instead of the fixed desc, which is only
1758 * good for smaller LBA (and maybe CHS?)
1761 ata_gen_ata_sense(qc);
1765 if (need_sense && !ap->ops->error_handler)
1766 ata_dump_status(ap->print_id, &qc->result_tf);
1774 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1775 * @dev: ATA device to which the command is addressed
1776 * @cmd: SCSI command to execute
1777 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1779 * Our ->queuecommand() function has decided that the SCSI
1780 * command issued can be directly translated into an ATA
1781 * command, rather than handled internally.
1783 * This function sets up an ata_queued_cmd structure for the
1784 * SCSI command, and sends that ata_queued_cmd to the hardware.
1786 * The xlat_func argument (actor) returns 0 if ready to execute
1787 * ATA command, else 1 to finish translation. If 1 is returned
1788 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1789 * to be set reflecting an error condition or clean (early)
1793 * spin_lock_irqsave(host lock)
1796 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1797 * needs to be deferred.
1799 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1800 ata_xlat_func_t xlat_func)
1802 struct ata_port *ap = dev->link->ap;
1803 struct ata_queued_cmd *qc;
1808 qc = ata_scsi_qc_new(dev, cmd);
1812 /* data is present; dma-map it */
1813 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1814 cmd->sc_data_direction == DMA_TO_DEVICE) {
1815 if (unlikely(scsi_bufflen(cmd) < 1)) {
1816 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
1820 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1822 qc->dma_dir = cmd->sc_data_direction;
1825 qc->complete_fn = ata_scsi_qc_complete;
1830 if (ap->ops->qc_defer) {
1831 if ((rc = ap->ops->qc_defer(qc)))
1835 /* select device, send command to hardware */
1843 cmd->scsi_done(cmd);
1844 DPRINTK("EXIT - early finish (good or error)\n");
1849 cmd->result = (DID_ERROR << 16);
1850 cmd->scsi_done(cmd);
1852 DPRINTK("EXIT - internal\n");
1857 DPRINTK("EXIT - defer\n");
1858 if (rc == ATA_DEFER_LINK)
1859 return SCSI_MLQUEUE_DEVICE_BUSY;
1861 return SCSI_MLQUEUE_HOST_BUSY;
1865 * ata_scsi_rbuf_get - Map response buffer.
1866 * @cmd: SCSI command containing buffer to be mapped.
1867 * @flags: unsigned long variable to store irq enable status
1868 * @copy_in: copy in from user buffer
1870 * Prepare buffer for simulated SCSI commands.
1873 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1876 * Pointer to response buffer.
1878 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1879 unsigned long *flags)
1881 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1883 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1885 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1886 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1887 return ata_scsi_rbuf;
1891 * ata_scsi_rbuf_put - Unmap response buffer.
1892 * @cmd: SCSI command containing buffer to be unmapped.
1893 * @copy_out: copy out result
1894 * @flags: @flags passed to ata_scsi_rbuf_get()
1896 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1897 * @copy_back is true.
1900 * Unlocks ata_scsi_rbuf_lock.
1902 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1903 unsigned long *flags)
1906 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1907 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1908 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1912 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1913 * @args: device IDENTIFY data / SCSI command of interest.
1914 * @actor: Callback hook for desired SCSI command simulator
1916 * Takes care of the hard work of simulating a SCSI command...
1917 * Mapping the response buffer, calling the command's handler,
1918 * and handling the handler's return value. This return value
1919 * indicates whether the handler wishes the SCSI command to be
1920 * completed successfully (0), or not (in which case cmd->result
1921 * and sense buffer are assumed to be set).
1924 * spin_lock_irqsave(host lock)
1926 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1927 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1931 struct scsi_cmnd *cmd = args->cmd;
1932 unsigned long flags;
1934 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1935 rc = actor(args, rbuf);
1936 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
1939 cmd->result = SAM_STAT_GOOD;
1944 * ata_scsiop_inq_std - Simulate INQUIRY command
1945 * @args: device IDENTIFY data / SCSI command of interest.
1946 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1948 * Returns standard device identification data associated
1949 * with non-VPD INQUIRY command output.
1952 * spin_lock_irqsave(host lock)
1954 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1956 const u8 versions[] = {
1957 0x60, /* SAM-3 (no version claimed) */
1960 0x20, /* SBC-2 (no version claimed) */
1963 0x60 /* SPC-3 (no version claimed) */
1968 0x5, /* claim SPC-3 version compatibility */
1975 /* set scsi removeable (RMB) bit per ata bit */
1976 if (ata_id_removeable(args->id))
1979 memcpy(rbuf, hdr, sizeof(hdr));
1980 memcpy(&rbuf[8], "ATA ", 8);
1981 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1982 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1984 if (rbuf[32] == 0 || rbuf[32] == ' ')
1985 memcpy(&rbuf[32], "n/a ", 4);
1987 memcpy(rbuf + 59, versions, sizeof(versions));
1993 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1994 * @args: device IDENTIFY data / SCSI command of interest.
1995 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1997 * Returns list of inquiry VPD pages available.
2000 * spin_lock_irqsave(host lock)
2002 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
2004 const u8 pages[] = {
2005 0x00, /* page 0x00, this page */
2006 0x80, /* page 0x80, unit serial no page */
2007 0x83, /* page 0x83, device ident page */
2008 0x89, /* page 0x89, ata info page */
2009 0xb0, /* page 0xb0, block limits page */
2010 0xb1, /* page 0xb1, block device characteristics page */
2011 0xb2, /* page 0xb2, thin provisioning page */
2014 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
2015 memcpy(rbuf + 4, pages, sizeof(pages));
2020 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2021 * @args: device IDENTIFY data / SCSI command of interest.
2022 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2024 * Returns ATA device serial number.
2027 * spin_lock_irqsave(host lock)
2029 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2033 0x80, /* this page code */
2035 ATA_ID_SERNO_LEN, /* page len */
2038 memcpy(rbuf, hdr, sizeof(hdr));
2039 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2040 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2045 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2046 * @args: device IDENTIFY data / SCSI command of interest.
2047 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2049 * Yields two logical unit device identification designators:
2050 * - vendor specific ASCII containing the ATA serial number
2051 * - SAT defined "t10 vendor id based" containing ASCII vendor
2052 * name ("ATA "), model and serial numbers.
2055 * spin_lock_irqsave(host lock)
2057 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2059 const int sat_model_serial_desc_len = 68;
2062 rbuf[1] = 0x83; /* this page code */
2065 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2067 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2069 ata_id_string(args->id, (unsigned char *) rbuf + num,
2070 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2071 num += ATA_ID_SERNO_LEN;
2073 /* SAT defined lu model and serial numbers descriptor */
2074 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2077 rbuf[num + 3] = sat_model_serial_desc_len;
2079 memcpy(rbuf + num, "ATA ", 8);
2081 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2083 num += ATA_ID_PROD_LEN;
2084 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2086 num += ATA_ID_SERNO_LEN;
2088 if (ata_id_has_wwn(args->id)) {
2089 /* SAT defined lu world wide name */
2090 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2093 rbuf[num + 3] = ATA_ID_WWN_LEN;
2095 ata_id_string(args->id, (unsigned char *) rbuf + num,
2096 ATA_ID_WWN, ATA_ID_WWN_LEN);
2097 num += ATA_ID_WWN_LEN;
2099 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2104 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2105 * @args: device IDENTIFY data / SCSI command of interest.
2106 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2108 * Yields SAT-specified ATA VPD page.
2111 * spin_lock_irqsave(host lock)
2113 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2115 struct ata_taskfile tf;
2117 memset(&tf, 0, sizeof(tf));
2119 rbuf[1] = 0x89; /* our page code */
2120 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2121 rbuf[3] = (0x238 & 0xff);
2123 memcpy(&rbuf[8], "linux ", 8);
2124 memcpy(&rbuf[16], "libata ", 16);
2125 memcpy(&rbuf[32], DRV_VERSION, 4);
2127 /* we don't store the ATA device signature, so we fake it */
2129 tf.command = ATA_DRDY; /* really, this is Status reg */
2133 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2134 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2136 rbuf[56] = ATA_CMD_ID_ATA;
2138 memcpy(&rbuf[60], &args->id[0], 512);
2142 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2147 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2150 * Optimal transfer length granularity.
2152 * This is always one physical block, but for disks with a smaller
2153 * logical than physical sector size we need to figure out what the
2156 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2157 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2160 * Optimal unmap granularity.
2162 * The ATA spec doesn't even know about a granularity or alignment
2163 * for the TRIM command. We can leave away most of the unmap related
2164 * VPD page entries, but we have specifify a granularity to signal
2165 * that we support some form of unmap - in thise case via WRITE SAME
2166 * with the unmap bit set.
2168 if (ata_id_has_trim(args->id)) {
2169 put_unaligned_be64(65535 * 512 / 8, &rbuf[36]);
2170 put_unaligned_be32(1, &rbuf[28]);
2176 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2178 int form_factor = ata_id_form_factor(args->id);
2179 int media_rotation_rate = ata_id_rotation_rate(args->id);
2183 rbuf[4] = media_rotation_rate >> 8;
2184 rbuf[5] = media_rotation_rate;
2185 rbuf[7] = form_factor;
2190 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2192 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2195 rbuf[5] = 1 << 6; /* TPWS */
2201 * ata_scsiop_noop - Command handler that simply returns success.
2202 * @args: device IDENTIFY data / SCSI command of interest.
2203 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2205 * No operation. Simply returns success to caller, to indicate
2206 * that the caller should successfully complete this SCSI command.
2209 * spin_lock_irqsave(host lock)
2211 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
2218 * modecpy - Prepare response for MODE SENSE
2219 * @dest: output buffer
2220 * @src: data being copied
2221 * @n: length of mode page
2222 * @changeable: whether changeable parameters are requested
2224 * Generate a generic MODE SENSE page for either current or changeable
2230 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2233 memcpy(dest, src, 2);
2234 memset(dest + 2, 0, n - 2);
2236 memcpy(dest, src, n);
2241 * ata_msense_caching - Simulate MODE SENSE caching info page
2242 * @id: device IDENTIFY data
2243 * @buf: output buffer
2244 * @changeable: whether changeable parameters are requested
2246 * Generate a caching info page, which conditionally indicates
2247 * write caching to the SCSI layer, depending on device
2253 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2255 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2256 if (changeable || ata_id_wcache_enabled(id))
2257 buf[2] |= (1 << 2); /* write cache enable */
2258 if (!changeable && !ata_id_rahead_enabled(id))
2259 buf[12] |= (1 << 5); /* disable read ahead */
2260 return sizeof(def_cache_mpage);
2264 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2265 * @buf: output buffer
2266 * @changeable: whether changeable parameters are requested
2268 * Generate a generic MODE SENSE control mode page.
2273 static unsigned int ata_msense_ctl_mode(u8 *buf, bool changeable)
2275 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2276 return sizeof(def_control_mpage);
2280 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2281 * @buf: output buffer
2282 * @changeable: whether changeable parameters are requested
2284 * Generate a generic MODE SENSE r/w error recovery page.
2289 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2291 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2293 return sizeof(def_rw_recovery_mpage);
2297 * We can turn this into a real blacklist if it's needed, for now just
2298 * blacklist any Maxtor BANC1G10 revision firmware
2300 static int ata_dev_supports_fua(u16 *id)
2302 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2306 if (!ata_id_has_fua(id))
2309 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2310 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2312 if (strcmp(model, "Maxtor"))
2314 if (strcmp(fw, "BANC1G10"))
2317 return 0; /* blacklisted */
2321 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2322 * @args: device IDENTIFY data / SCSI command of interest.
2323 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2325 * Simulate MODE SENSE commands. Assume this is invoked for direct
2326 * access devices (e.g. disks) only. There should be no block
2327 * descriptor for other device types.
2330 * spin_lock_irqsave(host lock)
2332 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2334 struct ata_device *dev = args->dev;
2335 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2336 const u8 sat_blk_desc[] = {
2337 0, 0, 0, 0, /* number of blocks: sat unspecified */
2339 0, 0x2, 0x0 /* block length: 512 bytes */
2342 unsigned int ebd, page_control, six_byte;
2347 six_byte = (scsicmd[0] == MODE_SENSE);
2348 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2350 * LLBA bit in msense(10) ignored (compliant)
2353 page_control = scsicmd[2] >> 6;
2354 switch (page_control) {
2355 case 0: /* current */
2356 case 1: /* changeable */
2357 case 2: /* defaults */
2358 break; /* supported */
2360 goto saving_not_supp;
2366 p += 4 + (ebd ? 8 : 0);
2368 p += 8 + (ebd ? 8 : 0);
2370 pg = scsicmd[2] & 0x3f;
2373 * No mode subpages supported (yet) but asking for _all_
2374 * subpages may be valid
2376 if (spg && (spg != ALL_SUB_MPAGES))
2380 case RW_RECOVERY_MPAGE:
2381 p += ata_msense_rw_recovery(p, page_control == 1);
2385 p += ata_msense_caching(args->id, p, page_control == 1);
2389 p += ata_msense_ctl_mode(p, page_control == 1);
2393 p += ata_msense_rw_recovery(p, page_control == 1);
2394 p += ata_msense_caching(args->id, p, page_control == 1);
2395 p += ata_msense_ctl_mode(p, page_control == 1);
2398 default: /* invalid page code */
2403 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2404 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2408 rbuf[0] = p - rbuf - 1;
2411 rbuf[3] = sizeof(sat_blk_desc);
2412 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2415 unsigned int output_len = p - rbuf - 2;
2417 rbuf[0] = output_len >> 8;
2418 rbuf[1] = output_len;
2421 rbuf[7] = sizeof(sat_blk_desc);
2422 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2428 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2429 /* "Invalid field in cbd" */
2433 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2434 /* "Saving parameters not supported" */
2439 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2440 * @args: device IDENTIFY data / SCSI command of interest.
2441 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2443 * Simulate READ CAPACITY commands.
2448 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2450 struct ata_device *dev = args->dev;
2451 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2452 u32 sector_size; /* physical sector size in bytes */
2456 sector_size = ata_id_logical_sector_size(dev->id);
2457 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2458 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2462 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2463 if (last_lba >= 0xffffffffULL)
2464 last_lba = 0xffffffff;
2466 /* sector count, 32-bit */
2467 rbuf[0] = last_lba >> (8 * 3);
2468 rbuf[1] = last_lba >> (8 * 2);
2469 rbuf[2] = last_lba >> (8 * 1);
2473 rbuf[4] = sector_size >> (8 * 3);
2474 rbuf[5] = sector_size >> (8 * 2);
2475 rbuf[6] = sector_size >> (8 * 1);
2476 rbuf[7] = sector_size;
2478 /* sector count, 64-bit */
2479 rbuf[0] = last_lba >> (8 * 7);
2480 rbuf[1] = last_lba >> (8 * 6);
2481 rbuf[2] = last_lba >> (8 * 5);
2482 rbuf[3] = last_lba >> (8 * 4);
2483 rbuf[4] = last_lba >> (8 * 3);
2484 rbuf[5] = last_lba >> (8 * 2);
2485 rbuf[6] = last_lba >> (8 * 1);
2489 rbuf[ 8] = sector_size >> (8 * 3);
2490 rbuf[ 9] = sector_size >> (8 * 2);
2491 rbuf[10] = sector_size >> (8 * 1);
2492 rbuf[11] = sector_size;
2495 rbuf[13] = log2_per_phys;
2496 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2497 rbuf[15] = lowest_aligned;
2499 if (ata_id_has_trim(args->id)) {
2500 rbuf[14] |= 0x80; /* TPE */
2502 if (ata_id_has_zero_after_trim(args->id))
2503 rbuf[14] |= 0x40; /* TPRZ */
2511 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2512 * @args: device IDENTIFY data / SCSI command of interest.
2513 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2515 * Simulate REPORT LUNS command.
2518 * spin_lock_irqsave(host lock)
2520 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2523 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2528 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2530 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2531 /* FIXME: not quite right; we don't want the
2532 * translation of taskfile registers into
2533 * a sense descriptors, since that's only
2534 * correct for ATA, not ATAPI
2536 ata_gen_passthru_sense(qc);
2539 qc->scsidone(qc->scsicmd);
2543 /* is it pointless to prefer PIO for "safety reasons"? */
2544 static inline int ata_pio_use_silly(struct ata_port *ap)
2546 return (ap->flags & ATA_FLAG_PIO_DMA);
2549 static void atapi_request_sense(struct ata_queued_cmd *qc)
2551 struct ata_port *ap = qc->ap;
2552 struct scsi_cmnd *cmd = qc->scsicmd;
2554 DPRINTK("ATAPI request sense\n");
2556 /* FIXME: is this needed? */
2557 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2559 #ifdef CONFIG_ATA_SFF
2560 if (ap->ops->sff_tf_read)
2561 ap->ops->sff_tf_read(ap, &qc->tf);
2564 /* fill these in, for the case where they are -not- overwritten */
2565 cmd->sense_buffer[0] = 0x70;
2566 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2570 /* setup sg table and init transfer direction */
2571 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2572 ata_sg_init(qc, &qc->sgent, 1);
2573 qc->dma_dir = DMA_FROM_DEVICE;
2575 memset(&qc->cdb, 0, qc->dev->cdb_len);
2576 qc->cdb[0] = REQUEST_SENSE;
2577 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2579 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2580 qc->tf.command = ATA_CMD_PACKET;
2582 if (ata_pio_use_silly(ap)) {
2583 qc->tf.protocol = ATAPI_PROT_DMA;
2584 qc->tf.feature |= ATAPI_PKT_DMA;
2586 qc->tf.protocol = ATAPI_PROT_PIO;
2587 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2590 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2592 qc->complete_fn = atapi_sense_complete;
2599 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2601 struct scsi_cmnd *cmd = qc->scsicmd;
2602 unsigned int err_mask = qc->err_mask;
2604 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2606 /* handle completion from new EH */
2607 if (unlikely(qc->ap->ops->error_handler &&
2608 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2610 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2611 /* FIXME: not quite right; we don't want the
2612 * translation of taskfile registers into a
2613 * sense descriptors, since that's only
2614 * correct for ATA, not ATAPI
2616 ata_gen_passthru_sense(qc);
2619 /* SCSI EH automatically locks door if sdev->locked is
2620 * set. Sometimes door lock request continues to
2621 * fail, for example, when no media is present. This
2622 * creates a loop - SCSI EH issues door lock which
2623 * fails and gets invoked again to acquire sense data
2624 * for the failed command.
2626 * If door lock fails, always clear sdev->locked to
2627 * avoid this infinite loop.
2629 * This may happen before SCSI scan is complete. Make
2630 * sure qc->dev->sdev isn't NULL before dereferencing.
2632 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2633 qc->dev->sdev->locked = 0;
2635 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2641 /* successful completion or old EH failure path */
2642 if (unlikely(err_mask & AC_ERR_DEV)) {
2643 cmd->result = SAM_STAT_CHECK_CONDITION;
2644 atapi_request_sense(qc);
2646 } else if (unlikely(err_mask)) {
2647 /* FIXME: not quite right; we don't want the
2648 * translation of taskfile registers into
2649 * a sense descriptors, since that's only
2650 * correct for ATA, not ATAPI
2652 ata_gen_passthru_sense(qc);
2654 u8 *scsicmd = cmd->cmnd;
2656 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2657 unsigned long flags;
2660 buf = ata_scsi_rbuf_get(cmd, true, &flags);
2662 /* ATAPI devices typically report zero for their SCSI version,
2663 * and sometimes deviate from the spec WRT response data
2664 * format. If SCSI version is reported as zero like normal,
2665 * then we make the following fixups: 1) Fake MMC-5 version,
2666 * to indicate to the Linux scsi midlayer this is a modern
2667 * device. 2) Ensure response data format / ATAPI information
2668 * are always correct.
2675 ata_scsi_rbuf_put(cmd, true, &flags);
2678 cmd->result = SAM_STAT_GOOD;
2685 * atapi_xlat - Initialize PACKET taskfile
2686 * @qc: command structure to be initialized
2689 * spin_lock_irqsave(host lock)
2692 * Zero on success, non-zero on failure.
2694 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2696 struct scsi_cmnd *scmd = qc->scsicmd;
2697 struct ata_device *dev = qc->dev;
2698 int nodata = (scmd->sc_data_direction == DMA_NONE);
2699 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2700 unsigned int nbytes;
2702 memset(qc->cdb, 0, dev->cdb_len);
2703 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2705 qc->complete_fn = atapi_qc_complete;
2707 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2708 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2709 qc->tf.flags |= ATA_TFLAG_WRITE;
2710 DPRINTK("direction: write\n");
2713 qc->tf.command = ATA_CMD_PACKET;
2714 ata_qc_set_pc_nbytes(qc);
2716 /* check whether ATAPI DMA is safe */
2717 if (!nodata && !using_pio && atapi_check_dma(qc))
2720 /* Some controller variants snoop this value for Packet
2721 * transfers to do state machine and FIFO management. Thus we
2722 * want to set it properly, and for DMA where it is
2723 * effectively meaningless.
2725 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2727 /* Most ATAPI devices which honor transfer chunk size don't
2728 * behave according to the spec when odd chunk size which
2729 * matches the transfer length is specified. If the number of
2730 * bytes to transfer is 2n+1. According to the spec, what
2731 * should happen is to indicate that 2n+1 is going to be
2732 * transferred and transfer 2n+2 bytes where the last byte is
2735 * In practice, this doesn't happen. ATAPI devices first
2736 * indicate and transfer 2n bytes and then indicate and
2737 * transfer 2 bytes where the last byte is padding.
2739 * This inconsistency confuses several controllers which
2740 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2741 * These controllers use actual number of transferred bytes to
2742 * update DMA poitner and transfer of 4n+2 bytes make those
2743 * controller push DMA pointer by 4n+4 bytes because SATA data
2744 * FISes are aligned to 4 bytes. This causes data corruption
2745 * and buffer overrun.
2747 * Always setting nbytes to even number solves this problem
2748 * because then ATAPI devices don't have to split data at 2n
2754 qc->tf.lbam = (nbytes & 0xFF);
2755 qc->tf.lbah = (nbytes >> 8);
2758 qc->tf.protocol = ATAPI_PROT_NODATA;
2760 qc->tf.protocol = ATAPI_PROT_PIO;
2763 qc->tf.protocol = ATAPI_PROT_DMA;
2764 qc->tf.feature |= ATAPI_PKT_DMA;
2766 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2767 (scmd->sc_data_direction != DMA_TO_DEVICE))
2768 /* some SATA bridges need us to indicate data xfer direction */
2769 qc->tf.feature |= ATAPI_DMADIR;
2773 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2774 as ATAPI tape drives don't get this right otherwise */
2778 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2780 if (!sata_pmp_attached(ap)) {
2781 if (likely(devno < ata_link_max_devices(&ap->link)))
2782 return &ap->link.device[devno];
2784 if (likely(devno < ap->nr_pmp_links))
2785 return &ap->pmp_link[devno].device[0];
2791 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2792 const struct scsi_device *scsidev)
2796 /* skip commands not addressed to targets we simulate */
2797 if (!sata_pmp_attached(ap)) {
2798 if (unlikely(scsidev->channel || scsidev->lun))
2800 devno = scsidev->id;
2802 if (unlikely(scsidev->id || scsidev->lun))
2804 devno = scsidev->channel;
2807 return ata_find_dev(ap, devno);
2811 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2812 * @ap: ATA port to which the device is attached
2813 * @scsidev: SCSI device from which we derive the ATA device
2815 * Given various information provided in struct scsi_cmnd,
2816 * map that onto an ATA bus, and using that mapping
2817 * determine which ata_device is associated with the
2818 * SCSI command to be sent.
2821 * spin_lock_irqsave(host lock)
2824 * Associated ATA device, or %NULL if not found.
2826 static struct ata_device *
2827 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2829 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2831 if (unlikely(!dev || !ata_dev_enabled(dev)))
2838 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2839 * @byte1: Byte 1 from pass-thru CDB.
2842 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2845 ata_scsi_map_proto(u8 byte1)
2847 switch((byte1 & 0x1e) >> 1) {
2848 case 3: /* Non-data */
2849 return ATA_PROT_NODATA;
2852 case 10: /* UDMA Data-in */
2853 case 11: /* UDMA Data-Out */
2854 return ATA_PROT_DMA;
2856 case 4: /* PIO Data-in */
2857 case 5: /* PIO Data-out */
2858 return ATA_PROT_PIO;
2860 case 0: /* Hard Reset */
2862 case 8: /* Device Diagnostic */
2863 case 9: /* Device Reset */
2864 case 7: /* DMA Queued */
2865 case 12: /* FPDMA */
2866 case 15: /* Return Response Info */
2867 default: /* Reserved */
2871 return ATA_PROT_UNKNOWN;
2875 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2876 * @qc: command structure to be initialized
2878 * Handles either 12 or 16-byte versions of the CDB.
2881 * Zero on success, non-zero on failure.
2883 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2885 struct ata_taskfile *tf = &(qc->tf);
2886 struct scsi_cmnd *scmd = qc->scsicmd;
2887 struct ata_device *dev = qc->dev;
2888 const u8 *cdb = scmd->cmnd;
2890 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2894 * 12 and 16 byte CDBs use different offsets to
2895 * provide the various register values.
2897 if (cdb[0] == ATA_16) {
2899 * 16-byte CDB - may contain extended commands.
2901 * If that is the case, copy the upper byte register values.
2903 if (cdb[1] & 0x01) {
2904 tf->hob_feature = cdb[3];
2905 tf->hob_nsect = cdb[5];
2906 tf->hob_lbal = cdb[7];
2907 tf->hob_lbam = cdb[9];
2908 tf->hob_lbah = cdb[11];
2909 tf->flags |= ATA_TFLAG_LBA48;
2911 tf->flags &= ~ATA_TFLAG_LBA48;
2914 * Always copy low byte, device and command registers.
2916 tf->feature = cdb[4];
2921 tf->device = cdb[13];
2922 tf->command = cdb[14];
2925 * 12-byte CDB - incapable of extended commands.
2927 tf->flags &= ~ATA_TFLAG_LBA48;
2929 tf->feature = cdb[3];
2934 tf->device = cdb[8];
2935 tf->command = cdb[9];
2938 /* enforce correct master/slave bit */
2939 tf->device = dev->devno ?
2940 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2942 switch (tf->command) {
2943 /* READ/WRITE LONG use a non-standard sect_size */
2944 case ATA_CMD_READ_LONG:
2945 case ATA_CMD_READ_LONG_ONCE:
2946 case ATA_CMD_WRITE_LONG:
2947 case ATA_CMD_WRITE_LONG_ONCE:
2948 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2950 qc->sect_size = scsi_bufflen(scmd);
2953 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2954 case ATA_CMD_CFA_WRITE_NE:
2955 case ATA_CMD_CFA_TRANS_SECT:
2956 case ATA_CMD_CFA_WRITE_MULT_NE:
2957 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2959 case ATA_CMD_READ_EXT:
2960 case ATA_CMD_READ_QUEUED:
2961 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2962 case ATA_CMD_FPDMA_READ:
2963 case ATA_CMD_READ_MULTI:
2964 case ATA_CMD_READ_MULTI_EXT:
2965 case ATA_CMD_PIO_READ:
2966 case ATA_CMD_PIO_READ_EXT:
2967 case ATA_CMD_READ_STREAM_DMA_EXT:
2968 case ATA_CMD_READ_STREAM_EXT:
2969 case ATA_CMD_VERIFY:
2970 case ATA_CMD_VERIFY_EXT:
2972 case ATA_CMD_WRITE_EXT:
2973 case ATA_CMD_WRITE_FUA_EXT:
2974 case ATA_CMD_WRITE_QUEUED:
2975 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
2976 case ATA_CMD_FPDMA_WRITE:
2977 case ATA_CMD_WRITE_MULTI:
2978 case ATA_CMD_WRITE_MULTI_EXT:
2979 case ATA_CMD_WRITE_MULTI_FUA_EXT:
2980 case ATA_CMD_PIO_WRITE:
2981 case ATA_CMD_PIO_WRITE_EXT:
2982 case ATA_CMD_WRITE_STREAM_DMA_EXT:
2983 case ATA_CMD_WRITE_STREAM_EXT:
2984 qc->sect_size = scmd->device->sector_size;
2987 /* Everything else uses 512 byte "sectors" */
2989 qc->sect_size = ATA_SECT_SIZE;
2993 * Set flags so that all registers will be written, pass on
2994 * write indication (used for PIO/DMA setup), result TF is
2995 * copied back and we don't whine too much about its failure.
2997 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2998 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2999 tf->flags |= ATA_TFLAG_WRITE;
3001 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3004 * Set transfer length.
3006 * TODO: find out if we need to do more here to
3007 * cover scatter/gather case.
3009 ata_qc_set_pc_nbytes(qc);
3011 /* We may not issue DMA commands if no DMA mode is set */
3012 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
3015 /* sanity check for pio multi commands */
3016 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
3019 if (is_multi_taskfile(tf)) {
3020 unsigned int multi_count = 1 << (cdb[1] >> 5);
3022 /* compare the passed through multi_count
3023 * with the cached multi_count of libata
3025 if (multi_count != dev->multi_count)
3026 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3031 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3032 * SET_FEATURES - XFER MODE must be preceded/succeeded
3033 * by an update to hardware-specific registers for each
3034 * controller (i.e. the reason for ->set_piomode(),
3035 * ->set_dmamode(), and ->post_set_mode() hooks).
3037 if (tf->command == ATA_CMD_SET_FEATURES &&
3038 tf->feature == SETFEATURES_XFER)
3042 * Filter TPM commands by default. These provide an
3043 * essentially uncontrolled encrypted "back door" between
3044 * applications and the disk. Set libata.allow_tpm=1 if you
3045 * have a real reason for wanting to use them. This ensures
3046 * that installed software cannot easily mess stuff up without
3047 * user intent. DVR type users will probably ship with this enabled
3048 * for movie content management.
3050 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3051 * for this and should do in future but that it is not sufficient as
3052 * DCS is an optional feature set. Thus we also do the software filter
3053 * so that we comply with the TC consortium stated goal that the user
3054 * can turn off TC features of their system.
3056 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
3062 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3063 /* "Invalid field in cdb" */
3067 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3069 struct ata_taskfile *tf = &qc->tf;
3070 struct scsi_cmnd *scmd = qc->scsicmd;
3071 struct ata_device *dev = qc->dev;
3072 const u8 *cdb = scmd->cmnd;
3078 /* we may not issue DMA commands if no DMA mode is set */
3079 if (unlikely(!dev->dma_mode))
3082 if (unlikely(scmd->cmd_len < 16))
3084 scsi_16_lba_len(cdb, &block, &n_block);
3086 /* for now we only support WRITE SAME with the unmap bit set */
3087 if (unlikely(!(cdb[1] & 0x8)))
3091 * WRITE SAME always has a sector sized buffer as payload, this
3092 * should never be a multiple entry S/G list.
3094 if (!scsi_sg_count(scmd))
3097 buf = page_address(sg_page(scsi_sglist(scmd)));
3098 size = ata_set_lba_range_entries(buf, 512, block, n_block);
3100 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3101 /* Newer devices support queued TRIM commands */
3102 tf->protocol = ATA_PROT_NCQ;
3103 tf->command = ATA_CMD_FPDMA_SEND;
3104 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3105 tf->nsect = qc->tag << 3;
3106 tf->hob_feature = (size / 512) >> 8;
3107 tf->feature = size / 512;
3111 tf->protocol = ATA_PROT_DMA;
3112 tf->hob_feature = 0;
3113 tf->feature = ATA_DSM_TRIM;
3114 tf->hob_nsect = (size / 512) >> 8;
3115 tf->nsect = size / 512;
3116 tf->command = ATA_CMD_DSM;
3119 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3122 ata_qc_set_pc_nbytes(qc);
3127 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3128 /* "Invalid field in cdb" */
3133 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3134 * @qc: Storage for translated ATA taskfile
3135 * @buf: input buffer
3136 * @len: number of valid bytes in the input buffer
3138 * Prepare a taskfile to modify caching information for the device.
3143 static int ata_mselect_caching(struct ata_queued_cmd *qc,
3144 const u8 *buf, int len)
3146 struct ata_taskfile *tf = &qc->tf;
3147 struct ata_device *dev = qc->dev;
3148 char mpage[CACHE_MPAGE_LEN];
3152 * The first two bytes of def_cache_mpage are a header, so offsets
3153 * in mpage are off by 2 compared to buf. Same for len.
3156 if (len != CACHE_MPAGE_LEN - 2)
3159 wce = buf[0] & (1 << 2);
3162 * Check that read-only bits are not modified.
3164 ata_msense_caching(dev->id, mpage, false);
3165 mpage[2] &= ~(1 << 2);
3167 if (memcmp(mpage + 2, buf, CACHE_MPAGE_LEN - 2) != 0)
3170 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3171 tf->protocol = ATA_PROT_NODATA;
3173 tf->command = ATA_CMD_SET_FEATURES;
3174 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3179 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
3180 * @qc: Storage for translated ATA taskfile
3182 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3183 * Assume this is invoked for direct access devices (e.g. disks) only.
3184 * There should be no block descriptor for other device types.
3187 * spin_lock_irqsave(host lock)
3189 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3191 struct scsi_cmnd *scmd = qc->scsicmd;
3192 const u8 *cdb = scmd->cmnd;
3195 unsigned six_byte, pg_len, hdr_len, bd_len;
3200 six_byte = (cdb[0] == MODE_SELECT);
3202 if (scmd->cmd_len < 5)
3208 if (scmd->cmd_len < 9)
3211 len = (cdb[7] << 8) + cdb[8];
3215 /* We only support PF=1, SP=0. */
3216 if ((cdb[1] & 0x11) != 0x10)
3219 /* Test early for possible overrun. */
3220 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
3221 goto invalid_param_len;
3223 p = page_address(sg_page(scsi_sglist(scmd)));
3225 /* Move past header and block descriptors. */
3227 goto invalid_param_len;
3232 bd_len = (p[6] << 8) + p[7];
3237 goto invalid_param_len;
3238 if (bd_len != 0 && bd_len != 8)
3246 /* Parse both possible formats for the mode page headers. */
3250 goto invalid_param_len;
3253 pg_len = (p[2] << 8) | p[3];
3258 goto invalid_param_len;
3267 * No mode subpages supported (yet) but asking for _all_
3268 * subpages may be valid
3270 if (spg && (spg != ALL_SUB_MPAGES))
3273 goto invalid_param_len;
3277 if (ata_mselect_caching(qc, p, pg_len) < 0)
3281 default: /* invalid page code */
3286 * Only one page has changeable data, so we only support setting one
3295 /* "Invalid field in CDB" */
3296 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
3300 /* "Invalid field in parameter list" */
3301 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x26, 0x0);
3305 /* "Parameter list length error" */
3306 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3310 scmd->result = SAM_STAT_GOOD;
3315 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3317 * @cmd: SCSI command opcode to consider
3319 * Look up the SCSI command given, and determine whether the
3320 * SCSI command is to be translated or simulated.
3323 * Pointer to translation function if possible, %NULL if not.
3326 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3336 return ata_scsi_rw_xlat;
3339 return ata_scsi_write_same_xlat;
3341 case SYNCHRONIZE_CACHE:
3342 if (ata_try_flush_cache(dev))
3343 return ata_scsi_flush_xlat;
3348 return ata_scsi_verify_xlat;
3352 return ata_scsi_pass_thru;
3355 case MODE_SELECT_10:
3356 return ata_scsi_mode_select_xlat;
3360 return ata_scsi_start_stop_xlat;
3367 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3368 * @ap: ATA port to which the command was being sent
3369 * @cmd: SCSI command to dump
3371 * Prints the contents of a SCSI command via printk().
3374 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3375 struct scsi_cmnd *cmd)
3378 struct scsi_device *scsidev = cmd->device;
3379 u8 *scsicmd = cmd->cmnd;
3381 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
3383 scsidev->channel, scsidev->id, scsidev->lun,
3384 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3385 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3390 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
3391 struct ata_device *dev)
3393 u8 scsi_op = scmd->cmnd[0];
3394 ata_xlat_func_t xlat_func;
3397 if (dev->class == ATA_DEV_ATA) {
3398 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3401 xlat_func = ata_get_xlat_func(dev, scsi_op);
3403 if (unlikely(!scmd->cmd_len))
3407 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3408 /* relay SCSI command to ATAPI device */
3409 int len = COMMAND_SIZE(scsi_op);
3410 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
3413 xlat_func = atapi_xlat;
3415 /* ATA_16 passthru, treat as an ATA command */
3416 if (unlikely(scmd->cmd_len > 16))
3419 xlat_func = ata_get_xlat_func(dev, scsi_op);
3424 rc = ata_scsi_translate(dev, scmd, xlat_func);
3426 ata_scsi_simulate(dev, scmd);
3431 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3432 scmd->cmd_len, scsi_op, dev->cdb_len);
3433 scmd->result = DID_ERROR << 16;
3434 scmd->scsi_done(scmd);
3439 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3440 * @shost: SCSI host of command to be sent
3441 * @cmd: SCSI command to be sent
3443 * In some cases, this function translates SCSI commands into
3444 * ATA taskfiles, and queues the taskfiles to be sent to
3445 * hardware. In other cases, this function simulates a
3446 * SCSI device by evaluating and responding to certain
3447 * SCSI commands. This creates the overall effect of
3448 * ATA and ATAPI devices appearing as SCSI devices.
3454 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3457 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
3459 struct ata_port *ap;
3460 struct ata_device *dev;
3461 struct scsi_device *scsidev = cmd->device;
3463 unsigned long irq_flags;
3465 ap = ata_shost_to_port(shost);
3467 spin_lock_irqsave(ap->lock, irq_flags);
3469 ata_scsi_dump_cdb(ap, cmd);
3471 dev = ata_scsi_find_dev(ap, scsidev);
3473 rc = __ata_scsi_queuecmd(cmd, dev);
3475 cmd->result = (DID_BAD_TARGET << 16);
3476 cmd->scsi_done(cmd);
3479 spin_unlock_irqrestore(ap->lock, irq_flags);
3485 * ata_scsi_simulate - simulate SCSI command on ATA device
3486 * @dev: the target device
3487 * @cmd: SCSI command being sent to device.
3489 * Interprets and directly executes a select list of SCSI commands
3490 * that can be handled internally.
3493 * spin_lock_irqsave(host lock)
3496 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
3498 struct ata_scsi_args args;
3499 const u8 *scsicmd = cmd->cmnd;
3505 args.done = cmd->scsi_done;
3507 switch(scsicmd[0]) {
3508 /* TODO: worth improving? */
3510 ata_scsi_invalid_field(cmd);
3514 if (scsicmd[1] & 2) /* is CmdDt set? */
3515 ata_scsi_invalid_field(cmd);
3516 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3517 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3518 else switch (scsicmd[2]) {
3520 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
3523 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
3526 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
3529 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3532 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3535 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3538 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
3541 ata_scsi_invalid_field(cmd);
3548 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3552 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3555 case SERVICE_ACTION_IN:
3556 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3557 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3559 ata_scsi_invalid_field(cmd);
3563 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3567 ata_scsi_set_sense(cmd, 0, 0, 0);
3568 cmd->result = (DRIVER_SENSE << 24);
3569 cmd->scsi_done(cmd);
3572 /* if we reach this, then writeback caching is disabled,
3573 * turning this into a no-op.
3575 case SYNCHRONIZE_CACHE:
3578 /* no-op's, complete with success */
3582 case TEST_UNIT_READY:
3583 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3586 case SEND_DIAGNOSTIC:
3587 tmp8 = scsicmd[1] & ~(1 << 3);
3588 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3589 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3591 ata_scsi_invalid_field(cmd);
3594 /* all other commands */
3596 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3597 /* "Invalid command operation code" */
3598 cmd->scsi_done(cmd);
3603 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3607 for (i = 0; i < host->n_ports; i++) {
3608 struct ata_port *ap = host->ports[i];
3609 struct Scsi_Host *shost;
3612 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3616 shost->eh_noresume = 1;
3617 *(struct ata_port **)&shost->hostdata[0] = ap;
3618 ap->scsi_host = shost;
3620 shost->transportt = ata_scsi_transport_template;
3621 shost->unique_id = ap->print_id;
3624 shost->max_channel = 1;
3625 shost->max_cmd_len = 16;
3627 /* Schedule policy is determined by ->qc_defer()
3628 * callback and it needs to see every deferred qc.
3629 * Set host_blocked to 1 to prevent SCSI midlayer from
3630 * automatically deferring requests.
3632 shost->max_host_blocked = 1;
3634 rc = scsi_add_host_with_dma(ap->scsi_host,
3635 &ap->tdev, ap->host->dev);
3643 scsi_host_put(host->ports[i]->scsi_host);
3646 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3648 scsi_remove_host(shost);
3649 scsi_host_put(shost);
3654 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3657 struct ata_device *last_failed_dev = NULL;
3658 struct ata_link *link;
3659 struct ata_device *dev;
3662 ata_for_each_link(link, ap, EDGE) {
3663 ata_for_each_dev(dev, link, ENABLED) {
3664 struct scsi_device *sdev;
3665 int channel = 0, id = 0;
3670 if (ata_is_host_link(link))
3673 channel = link->pmp;
3675 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3677 if (!IS_ERR(sdev)) {
3679 scsi_device_put(sdev);
3680 ata_scsi_acpi_bind(dev);
3687 /* If we scanned while EH was in progress or allocation
3688 * failure occurred, scan would have failed silently. Check
3689 * whether all devices are attached.
3691 ata_for_each_link(link, ap, EDGE) {
3692 ata_for_each_dev(dev, link, ENABLED) {
3701 /* we're missing some SCSI devices */
3703 /* If caller requested synchrnous scan && we've made
3704 * any progress, sleep briefly and repeat.
3706 if (dev != last_failed_dev) {
3708 last_failed_dev = dev;
3712 /* We might be failing to detect boot device, give it
3713 * a few more chances.
3721 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
3724 queue_delayed_work(system_long_wq, &ap->hotplug_task,
3725 round_jiffies_relative(HZ));
3729 * ata_scsi_offline_dev - offline attached SCSI device
3730 * @dev: ATA device to offline attached SCSI device for
3732 * This function is called from ata_eh_hotplug() and responsible
3733 * for taking the SCSI device attached to @dev offline. This
3734 * function is called with host lock which protects dev->sdev
3738 * spin_lock_irqsave(host lock)
3741 * 1 if attached SCSI device exists, 0 otherwise.
3743 int ata_scsi_offline_dev(struct ata_device *dev)
3746 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3753 * ata_scsi_remove_dev - remove attached SCSI device
3754 * @dev: ATA device to remove attached SCSI device for
3756 * This function is called from ata_eh_scsi_hotplug() and
3757 * responsible for removing the SCSI device attached to @dev.
3760 * Kernel thread context (may sleep).
3762 static void ata_scsi_remove_dev(struct ata_device *dev)
3764 struct ata_port *ap = dev->link->ap;
3765 struct scsi_device *sdev;
3766 unsigned long flags;
3768 ata_scsi_acpi_unbind(dev);
3770 /* Alas, we need to grab scan_mutex to ensure SCSI device
3771 * state doesn't change underneath us and thus
3772 * scsi_device_get() always succeeds. The mutex locking can
3773 * be removed if there is __scsi_device_get() interface which
3774 * increments reference counts regardless of device state.
3776 mutex_lock(&ap->scsi_host->scan_mutex);
3777 spin_lock_irqsave(ap->lock, flags);
3779 /* clearing dev->sdev is protected by host lock */
3784 /* If user initiated unplug races with us, sdev can go
3785 * away underneath us after the host lock and
3786 * scan_mutex are released. Hold onto it.
3788 if (scsi_device_get(sdev) == 0) {
3789 /* The following ensures the attached sdev is
3790 * offline on return from ata_scsi_offline_dev()
3791 * regardless it wins or loses the race
3792 * against this function.
3794 scsi_device_set_state(sdev, SDEV_OFFLINE);
3801 spin_unlock_irqrestore(ap->lock, flags);
3802 mutex_unlock(&ap->scsi_host->scan_mutex);
3805 ata_dev_info(dev, "detaching (SCSI %s)\n",
3806 dev_name(&sdev->sdev_gendev));
3808 scsi_remove_device(sdev);
3809 scsi_device_put(sdev);
3813 static void ata_scsi_handle_link_detach(struct ata_link *link)
3815 struct ata_port *ap = link->ap;
3816 struct ata_device *dev;
3818 ata_for_each_dev(dev, link, ALL) {
3819 unsigned long flags;
3821 if (!(dev->flags & ATA_DFLAG_DETACHED))
3824 spin_lock_irqsave(ap->lock, flags);
3825 dev->flags &= ~ATA_DFLAG_DETACHED;
3826 spin_unlock_irqrestore(ap->lock, flags);
3828 if (zpodd_dev_enabled(dev))
3831 ata_scsi_remove_dev(dev);
3836 * ata_scsi_media_change_notify - send media change event
3837 * @dev: Pointer to the disk device with media change event
3839 * Tell the block layer to send a media change notification
3843 * spin_lock_irqsave(host lock)
3845 void ata_scsi_media_change_notify(struct ata_device *dev)
3848 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3853 * ata_scsi_hotplug - SCSI part of hotplug
3854 * @work: Pointer to ATA port to perform SCSI hotplug on
3856 * Perform SCSI part of hotplug. It's executed from a separate
3857 * workqueue after EH completes. This is necessary because SCSI
3858 * hot plugging requires working EH and hot unplugging is
3859 * synchronized with hot plugging with a mutex.
3862 * Kernel thread context (may sleep).
3864 void ata_scsi_hotplug(struct work_struct *work)
3866 struct ata_port *ap =
3867 container_of(work, struct ata_port, hotplug_task.work);
3870 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3871 DPRINTK("ENTER/EXIT - unloading\n");
3876 mutex_lock(&ap->scsi_scan_mutex);
3878 /* Unplug detached devices. We cannot use link iterator here
3879 * because PMP links have to be scanned even if PMP is
3880 * currently not attached. Iterate manually.
3882 ata_scsi_handle_link_detach(&ap->link);
3884 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3885 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3887 /* scan for new ones */
3888 ata_scsi_scan_host(ap, 0);
3890 mutex_unlock(&ap->scsi_scan_mutex);
3895 * ata_scsi_user_scan - indication for user-initiated bus scan
3896 * @shost: SCSI host to scan
3897 * @channel: Channel to scan
3901 * This function is called when user explicitly requests bus
3902 * scan. Set probe pending flag and invoke EH.
3905 * SCSI layer (we don't care)
3910 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3911 unsigned int id, unsigned int lun)
3913 struct ata_port *ap = ata_shost_to_port(shost);
3914 unsigned long flags;
3917 if (!ap->ops->error_handler)
3920 if (lun != SCAN_WILD_CARD && lun)
3923 if (!sata_pmp_attached(ap)) {
3924 if (channel != SCAN_WILD_CARD && channel)
3928 if (id != SCAN_WILD_CARD && id)
3933 spin_lock_irqsave(ap->lock, flags);
3935 if (devno == SCAN_WILD_CARD) {
3936 struct ata_link *link;
3938 ata_for_each_link(link, ap, EDGE) {
3939 struct ata_eh_info *ehi = &link->eh_info;
3940 ehi->probe_mask |= ATA_ALL_DEVICES;
3941 ehi->action |= ATA_EH_RESET;
3944 struct ata_device *dev = ata_find_dev(ap, devno);
3947 struct ata_eh_info *ehi = &dev->link->eh_info;
3948 ehi->probe_mask |= 1 << dev->devno;
3949 ehi->action |= ATA_EH_RESET;
3955 ata_port_schedule_eh(ap);
3956 spin_unlock_irqrestore(ap->lock, flags);
3957 ata_port_wait_eh(ap);
3959 spin_unlock_irqrestore(ap->lock, flags);
3965 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3966 * @work: Pointer to ATA port to perform scsi_rescan_device()
3968 * After ATA pass thru (SAT) commands are executed successfully,
3969 * libata need to propagate the changes to SCSI layer.
3972 * Kernel thread context (may sleep).
3974 void ata_scsi_dev_rescan(struct work_struct *work)
3976 struct ata_port *ap =
3977 container_of(work, struct ata_port, scsi_rescan_task);
3978 struct ata_link *link;
3979 struct ata_device *dev;
3980 unsigned long flags;
3982 mutex_lock(&ap->scsi_scan_mutex);
3983 spin_lock_irqsave(ap->lock, flags);
3985 ata_for_each_link(link, ap, EDGE) {
3986 ata_for_each_dev(dev, link, ENABLED) {
3987 struct scsi_device *sdev = dev->sdev;
3991 if (scsi_device_get(sdev))
3994 spin_unlock_irqrestore(ap->lock, flags);
3995 scsi_rescan_device(&(sdev->sdev_gendev));
3996 scsi_device_put(sdev);
3997 spin_lock_irqsave(ap->lock, flags);
4001 spin_unlock_irqrestore(ap->lock, flags);
4002 mutex_unlock(&ap->scsi_scan_mutex);
4006 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4007 * @host: ATA host container for all SAS ports
4008 * @port_info: Information from low-level host driver
4009 * @shost: SCSI host that the scsi device is attached to
4012 * PCI/etc. bus probe sem.
4015 * ata_port pointer on success / NULL on failure.
4018 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
4019 struct ata_port_info *port_info,
4020 struct Scsi_Host *shost)
4022 struct ata_port *ap;
4024 ap = ata_port_alloc(host);
4029 ap->lock = &host->lock;
4030 ap->pio_mask = port_info->pio_mask;
4031 ap->mwdma_mask = port_info->mwdma_mask;
4032 ap->udma_mask = port_info->udma_mask;
4033 ap->flags |= port_info->flags;
4034 ap->ops = port_info->port_ops;
4035 ap->cbl = ATA_CBL_SATA;
4039 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
4042 * ata_sas_port_start - Set port up for dma.
4043 * @ap: Port to initialize
4045 * Called just after data structures for each port are
4048 * May be used as the port_start() entry in ata_port_operations.
4051 * Inherited from caller.
4053 int ata_sas_port_start(struct ata_port *ap)
4056 * the port is marked as frozen at allocation time, but if we don't
4057 * have new eh, we won't thaw it
4059 if (!ap->ops->error_handler)
4060 ap->pflags &= ~ATA_PFLAG_FROZEN;
4063 EXPORT_SYMBOL_GPL(ata_sas_port_start);
4066 * ata_port_stop - Undo ata_sas_port_start()
4067 * @ap: Port to shut down
4069 * May be used as the port_stop() entry in ata_port_operations.
4072 * Inherited from caller.
4075 void ata_sas_port_stop(struct ata_port *ap)
4078 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
4081 * ata_sas_async_probe - simply schedule probing and return
4082 * @ap: Port to probe
4084 * For batch scheduling of probe for sas attached ata devices, assumes
4085 * the port has already been through ata_sas_port_init()
4087 void ata_sas_async_probe(struct ata_port *ap)
4089 __ata_port_probe(ap);
4091 EXPORT_SYMBOL_GPL(ata_sas_async_probe);
4093 int ata_sas_sync_probe(struct ata_port *ap)
4095 return ata_port_probe(ap);
4097 EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
4101 * ata_sas_port_init - Initialize a SATA device
4102 * @ap: SATA port to initialize
4105 * PCI/etc. bus probe sem.
4108 * Zero on success, non-zero on error.
4111 int ata_sas_port_init(struct ata_port *ap)
4113 int rc = ap->ops->port_start(ap);
4117 ap->print_id = atomic_inc_return(&ata_print_id);
4120 EXPORT_SYMBOL_GPL(ata_sas_port_init);
4123 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
4124 * @ap: SATA port to destroy
4128 void ata_sas_port_destroy(struct ata_port *ap)
4130 if (ap->ops->port_stop)
4131 ap->ops->port_stop(ap);
4134 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
4137 * ata_sas_slave_configure - Default slave_config routine for libata devices
4138 * @sdev: SCSI device to configure
4139 * @ap: ATA port to which SCSI device is attached
4145 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
4147 ata_scsi_sdev_config(sdev);
4148 ata_scsi_dev_config(sdev, ap->link.device);
4151 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
4154 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
4155 * @cmd: SCSI command to be sent
4156 * @ap: ATA port to which the command is being sent
4159 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4163 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
4167 ata_scsi_dump_cdb(ap, cmd);
4169 if (likely(ata_dev_enabled(ap->link.device)))
4170 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
4172 cmd->result = (DID_BAD_TARGET << 16);
4173 cmd->scsi_done(cmd);
4177 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);