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 *device,
115 struct device_attribute *attr,
116 const char *buf, size_t count)
118 struct Scsi_Host *shost = class_to_shost(device);
119 struct ata_port *ap = ata_shost_to_port(shost);
120 struct ata_link *link;
121 struct ata_device *dev;
122 enum ata_lpm_policy policy;
125 /* UNKNOWN is internal state, iterate from MAX_POWER */
126 for (policy = ATA_LPM_MAX_POWER;
127 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
128 const char *name = ata_lpm_policy_names[policy];
130 if (strncmp(name, buf, strlen(name)) == 0)
133 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
136 spin_lock_irqsave(ap->lock, flags);
138 ata_for_each_link(link, ap, EDGE) {
139 ata_for_each_dev(dev, &ap->link, ENABLED) {
140 if (dev->horkage & ATA_HORKAGE_NOLPM) {
147 ap->target_lpm_policy = policy;
148 ata_port_schedule_eh(ap);
150 spin_unlock_irqrestore(ap->lock, flags);
154 static ssize_t ata_scsi_lpm_show(struct device *dev,
155 struct device_attribute *attr, char *buf)
157 struct Scsi_Host *shost = class_to_shost(dev);
158 struct ata_port *ap = ata_shost_to_port(shost);
160 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
163 return snprintf(buf, PAGE_SIZE, "%s\n",
164 ata_lpm_policy_names[ap->target_lpm_policy]);
166 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
167 ata_scsi_lpm_show, ata_scsi_lpm_store);
168 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
170 static ssize_t ata_scsi_park_show(struct device *device,
171 struct device_attribute *attr, char *buf)
173 struct scsi_device *sdev = to_scsi_device(device);
175 struct ata_link *link;
176 struct ata_device *dev;
177 unsigned long flags, now;
178 unsigned int uninitialized_var(msecs);
181 ap = ata_shost_to_port(sdev->host);
183 spin_lock_irqsave(ap->lock, flags);
184 dev = ata_scsi_find_dev(ap, sdev);
189 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
196 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
197 link->eh_context.unloaded_mask & (1 << dev->devno) &&
198 time_after(dev->unpark_deadline, now))
199 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
204 spin_unlock_irq(ap->lock);
206 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
209 static ssize_t ata_scsi_park_store(struct device *device,
210 struct device_attribute *attr,
211 const char *buf, size_t len)
213 struct scsi_device *sdev = to_scsi_device(device);
215 struct ata_device *dev;
220 rc = kstrtol(buf, 10, &input);
225 if (input > ATA_TMOUT_MAX_PARK) {
227 input = ATA_TMOUT_MAX_PARK;
230 ap = ata_shost_to_port(sdev->host);
232 spin_lock_irqsave(ap->lock, flags);
233 dev = ata_scsi_find_dev(ap, sdev);
234 if (unlikely(!dev)) {
238 if (dev->class != ATA_DEV_ATA) {
244 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
249 dev->unpark_deadline = ata_deadline(jiffies, input);
250 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
251 ata_port_schedule_eh(ap);
252 complete(&ap->park_req_pending);
256 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
259 dev->flags |= ATA_DFLAG_NO_UNLOAD;
264 spin_unlock_irqrestore(ap->lock, flags);
266 return rc ? rc : len;
268 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
269 ata_scsi_park_show, ata_scsi_park_store);
270 EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
272 static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
274 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
276 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
280 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
281 const char *buf, size_t count)
283 struct Scsi_Host *shost = class_to_shost(dev);
284 struct ata_port *ap = ata_shost_to_port(shost);
285 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
286 return ap->ops->em_store(ap, buf, count);
291 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
294 struct Scsi_Host *shost = class_to_shost(dev);
295 struct ata_port *ap = ata_shost_to_port(shost);
297 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
298 return ap->ops->em_show(ap, buf);
301 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
302 ata_scsi_em_message_show, ata_scsi_em_message_store);
303 EXPORT_SYMBOL_GPL(dev_attr_em_message);
306 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
309 struct Scsi_Host *shost = class_to_shost(dev);
310 struct ata_port *ap = ata_shost_to_port(shost);
312 return snprintf(buf, 23, "%d\n", ap->em_message_type);
314 DEVICE_ATTR(em_message_type, S_IRUGO,
315 ata_scsi_em_message_type_show, NULL);
316 EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
319 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
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);
326 if (atadev && ap->ops->sw_activity_show &&
327 (ap->flags & ATA_FLAG_SW_ACTIVITY))
328 return ap->ops->sw_activity_show(atadev, buf);
333 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
334 const char *buf, size_t count)
336 struct scsi_device *sdev = to_scsi_device(dev);
337 struct ata_port *ap = ata_shost_to_port(sdev->host);
338 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
339 enum sw_activity val;
342 if (atadev && ap->ops->sw_activity_store &&
343 (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
344 val = simple_strtoul(buf, NULL, 0);
346 case OFF: case BLINK_ON: case BLINK_OFF:
347 rc = ap->ops->sw_activity_store(atadev, val);
356 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
357 ata_scsi_activity_store);
358 EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
360 struct device_attribute *ata_common_sdev_attrs[] = {
361 &dev_attr_unload_heads,
364 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
366 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd)
368 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
369 /* "Invalid field in cbd" */
374 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
375 * @sdev: SCSI device for which BIOS geometry is to be determined
376 * @bdev: block device associated with @sdev
377 * @capacity: capacity of SCSI device
378 * @geom: location to which geometry will be output
380 * Generic bios head/sector/cylinder calculator
381 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
382 * mapping. Some situations may arise where the disk is not
383 * bootable if this is not used.
386 * Defined by the SCSI layer. We don't really care.
391 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
392 sector_t capacity, int geom[])
396 sector_div(capacity, 255*63);
403 * ata_scsi_unlock_native_capacity - unlock native capacity
404 * @sdev: SCSI device to adjust device capacity for
406 * This function is called if a partition on @sdev extends beyond
407 * the end of the device. It requests EH to unlock HPA.
410 * Defined by the SCSI layer. Might sleep.
412 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
414 struct ata_port *ap = ata_shost_to_port(sdev->host);
415 struct ata_device *dev;
418 spin_lock_irqsave(ap->lock, flags);
420 dev = ata_scsi_find_dev(ap, sdev);
421 if (dev && dev->n_sectors < dev->n_native_sectors) {
422 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
423 dev->link->eh_info.action |= ATA_EH_RESET;
424 ata_port_schedule_eh(ap);
427 spin_unlock_irqrestore(ap->lock, flags);
428 ata_port_wait_eh(ap);
432 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
434 * @sdev: SCSI device to get identify data for
435 * @arg: User buffer area for identify data
438 * Defined by the SCSI layer. We don't really care.
441 * Zero on success, negative errno on error.
443 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
446 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
447 u16 __user *dst = arg;
453 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
456 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
457 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
460 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
461 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
464 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
465 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
472 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
473 * @scsidev: Device to which we are issuing command
474 * @arg: User provided data for issuing command
477 * Defined by the SCSI layer. We don't really care.
480 * Zero on success, negative errno on error.
482 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
485 u8 scsi_cmd[MAX_COMMAND_SIZE];
486 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
488 enum dma_data_direction data_dir;
494 if (copy_from_user(args, arg, sizeof(args)))
497 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
501 memset(scsi_cmd, 0, sizeof(scsi_cmd));
504 argsize = ATA_SECT_SIZE * args[3];
505 argbuf = kmalloc(argsize, GFP_KERNEL);
506 if (argbuf == NULL) {
511 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
512 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
513 block count in sector count field */
514 data_dir = DMA_FROM_DEVICE;
516 scsi_cmd[1] = (3 << 1); /* Non-data */
517 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
521 scsi_cmd[0] = ATA_16;
523 scsi_cmd[4] = args[2];
524 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
525 scsi_cmd[6] = args[3];
526 scsi_cmd[8] = args[1];
530 scsi_cmd[6] = args[1];
532 scsi_cmd[14] = args[0];
534 /* Good values for timeout and retries? Values below
535 from scsi_ioctl_send_command() for default case... */
536 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
537 sensebuf, (10*HZ), 5, 0, NULL);
539 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
540 u8 *desc = sensebuf + 8;
541 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
543 /* If we set cc then ATA pass-through will cause a
544 * check condition even if no error. Filter that. */
545 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
546 struct scsi_sense_hdr sshdr;
547 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
549 if (sshdr.sense_key == RECOVERED_ERROR &&
550 sshdr.asc == 0 && sshdr.ascq == 0x1d)
551 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
554 /* Send userspace a few ATA registers (same as drivers/ide) */
555 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
556 desc[0] == 0x09) { /* code is "ATA Descriptor" */
557 args[0] = desc[13]; /* status */
558 args[1] = desc[3]; /* error */
559 args[2] = desc[5]; /* sector count (0:7) */
560 if (copy_to_user(arg, args, sizeof(args)))
572 && copy_to_user(arg + sizeof(args), argbuf, argsize))
581 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
582 * @scsidev: Device to which we are issuing command
583 * @arg: User provided data for issuing command
586 * Defined by the SCSI layer. We don't really care.
589 * Zero on success, negative errno on error.
591 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
594 u8 scsi_cmd[MAX_COMMAND_SIZE];
595 u8 args[7], *sensebuf = NULL;
601 if (copy_from_user(args, arg, sizeof(args)))
604 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
608 memset(scsi_cmd, 0, sizeof(scsi_cmd));
609 scsi_cmd[0] = ATA_16;
610 scsi_cmd[1] = (3 << 1); /* Non-data */
611 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
612 scsi_cmd[4] = args[1];
613 scsi_cmd[6] = args[2];
614 scsi_cmd[8] = args[3];
615 scsi_cmd[10] = args[4];
616 scsi_cmd[12] = args[5];
617 scsi_cmd[13] = args[6] & 0x4f;
618 scsi_cmd[14] = args[0];
620 /* Good values for timeout and retries? Values below
621 from scsi_ioctl_send_command() for default case... */
622 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
623 sensebuf, (10*HZ), 5, 0, NULL);
625 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
626 u8 *desc = sensebuf + 8;
627 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
629 /* If we set cc then ATA pass-through will cause a
630 * check condition even if no error. Filter that. */
631 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
632 struct scsi_sense_hdr sshdr;
633 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
635 if (sshdr.sense_key == RECOVERED_ERROR &&
636 sshdr.asc == 0 && sshdr.ascq == 0x1d)
637 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
640 /* Send userspace ATA registers */
641 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
642 desc[0] == 0x09) {/* code is "ATA Descriptor" */
643 args[0] = desc[13]; /* status */
644 args[1] = desc[3]; /* error */
645 args[2] = desc[5]; /* sector count (0:7) */
646 args[3] = desc[7]; /* lbal */
647 args[4] = desc[9]; /* lbam */
648 args[5] = desc[11]; /* lbah */
649 args[6] = desc[12]; /* select */
650 if (copy_to_user(arg, args, sizeof(args)))
665 static int ata_ioc32(struct ata_port *ap)
667 if (ap->flags & ATA_FLAG_PIO_DMA)
669 if (ap->pflags & ATA_PFLAG_PIO32)
674 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
675 int cmd, void __user *arg)
677 int val = -EINVAL, rc = -EINVAL;
681 case ATA_IOC_GET_IO32:
682 spin_lock_irqsave(ap->lock, flags);
684 spin_unlock_irqrestore(ap->lock, flags);
685 if (copy_to_user(arg, &val, 1))
689 case ATA_IOC_SET_IO32:
690 val = (unsigned long) arg;
692 spin_lock_irqsave(ap->lock, flags);
693 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
695 ap->pflags |= ATA_PFLAG_PIO32;
697 ap->pflags &= ~ATA_PFLAG_PIO32;
699 if (val != ata_ioc32(ap))
702 spin_unlock_irqrestore(ap->lock, flags);
705 case HDIO_GET_IDENTITY:
706 return ata_get_identity(ap, scsidev, arg);
709 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
711 return ata_cmd_ioctl(scsidev, arg);
713 case HDIO_DRIVE_TASK:
714 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
716 return ata_task_ioctl(scsidev, arg);
725 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
727 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
729 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
732 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
735 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
736 * @dev: ATA device to which the new command is attached
737 * @cmd: SCSI command that originated this ATA command
739 * Obtain a reference to an unused ata_queued_cmd structure,
740 * which is the basic libata structure representing a single
741 * ATA command sent to the hardware.
743 * If a command was available, fill in the SCSI-specific
744 * portions of the structure with information on the
748 * spin_lock_irqsave(host lock)
751 * Command allocated, or %NULL if none available.
753 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
754 struct scsi_cmnd *cmd)
756 struct ata_queued_cmd *qc;
758 qc = ata_qc_new_init(dev);
761 qc->scsidone = cmd->scsi_done;
763 qc->sg = scsi_sglist(cmd);
764 qc->n_elem = scsi_sg_count(cmd);
766 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
773 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
775 struct scsi_cmnd *scmd = qc->scsicmd;
777 qc->extrabytes = scmd->request->extra_len;
778 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
782 * ata_dump_status - user friendly display of error info
783 * @id: id of the port in question
784 * @tf: ptr to filled out taskfile
786 * Decode and dump the ATA error/status registers for the user so
787 * that they have some idea what really happened at the non
788 * make-believe layer.
791 * inherited from caller
793 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
795 u8 stat = tf->command, err = tf->feature;
797 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
798 if (stat & ATA_BUSY) {
799 printk("Busy }\n"); /* Data is not valid in this case */
801 if (stat & 0x40) printk("DriveReady ");
802 if (stat & 0x20) printk("DeviceFault ");
803 if (stat & 0x10) printk("SeekComplete ");
804 if (stat & 0x08) printk("DataRequest ");
805 if (stat & 0x04) printk("CorrectedError ");
806 if (stat & 0x02) printk("Index ");
807 if (stat & 0x01) printk("Error ");
811 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
812 if (err & 0x04) printk("DriveStatusError ");
814 if (err & 0x04) printk("BadCRC ");
815 else printk("Sector ");
817 if (err & 0x40) printk("UncorrectableError ");
818 if (err & 0x10) printk("SectorIdNotFound ");
819 if (err & 0x02) printk("TrackZeroNotFound ");
820 if (err & 0x01) printk("AddrMarkNotFound ");
827 * ata_to_sense_error - convert ATA error to SCSI error
828 * @id: ATA device number
829 * @drv_stat: value contained in ATA status register
830 * @drv_err: value contained in ATA error register
831 * @sk: the sense key we'll fill out
832 * @asc: the additional sense code we'll fill out
833 * @ascq: the additional sense code qualifier we'll fill out
834 * @verbose: be verbose
836 * Converts an ATA error into a SCSI error. Fill out pointers to
837 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
838 * format sense blocks.
841 * spin_lock_irqsave(host lock)
843 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
844 u8 *asc, u8 *ascq, int verbose)
848 /* Based on the 3ware driver translation table */
849 static const unsigned char sense_table[][4] = {
851 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
853 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
855 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
856 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
857 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
858 /* MC|ID|ABRT|TRK0|MARK */
859 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
861 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
862 /* Bad address mark */
863 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
865 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
866 /* Abort: 0x04 is not translated here, see below */
867 /* Media change request */
868 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
870 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, // ID not found Logical address out of range
872 {0x20, UNIT_ATTENTION, 0x28, 0x00}, // Media Changed Not ready to ready change, medium may have changed
874 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
875 /* BBD - block marked bad */
876 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
877 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
879 static const unsigned char stat_table[][4] = {
880 /* Must be first because BUSY means no other bits valid */
881 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
882 {0x20, HARDWARE_ERROR, 0x44, 0x00}, // Device fault, internal target failure
883 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
884 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
885 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
889 * Is this an error we can process/parse
891 if (drv_stat & ATA_BUSY) {
892 drv_err = 0; /* Ignore the err bits, they're invalid */
896 /* Look for drv_err */
897 for (i = 0; sense_table[i][0] != 0xFF; i++) {
898 /* Look for best matches first */
899 if ((sense_table[i][0] & drv_err) ==
901 *sk = sense_table[i][1];
902 *asc = sense_table[i][2];
903 *ascq = sense_table[i][3];
910 * Fall back to interpreting status bits. Note that if the drv_err
911 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
912 * is not descriptive enough.
914 for (i = 0; stat_table[i][0] != 0xFF; i++) {
915 if (stat_table[i][0] & drv_stat) {
916 *sk = stat_table[i][1];
917 *asc = stat_table[i][2];
918 *ascq = stat_table[i][3];
924 * We need a sensible error return here, which is tricky, and one
925 * that won't cause people to do things like return a disk wrongly.
927 *sk = ABORTED_COMMAND;
933 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
934 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
935 id, drv_stat, drv_err, *sk, *asc, *ascq);
940 * ata_gen_passthru_sense - Generate check condition sense block.
941 * @qc: Command that completed.
943 * This function is specific to the ATA descriptor format sense
944 * block specified for the ATA pass through commands. Regardless
945 * of whether the command errored or not, return a sense
946 * block. Copy all controller registers into the sense
947 * block. If there was no error, we get the request from an ATA
948 * passthrough command, so we use the following sense data:
949 * sk = RECOVERED ERROR
950 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
956 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
958 struct scsi_cmnd *cmd = qc->scsicmd;
959 struct ata_taskfile *tf = &qc->result_tf;
960 unsigned char *sb = cmd->sense_buffer;
961 unsigned char *desc = sb + 8;
962 int verbose = qc->ap->ops->error_handler == NULL;
964 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
966 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
969 * Use ata_to_sense_error() to map status register bits
970 * onto sense key, asc & ascq.
973 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
974 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
975 &sb[1], &sb[2], &sb[3], verbose);
978 sb[1] = RECOVERED_ERROR;
984 * Sense data is current and format is descriptor.
990 /* set length of additional sense data */
995 * Copy registers into sense buffer.
998 desc[3] = tf->feature; /* == error reg */
1002 desc[11] = tf->lbah;
1003 desc[12] = tf->device;
1004 desc[13] = tf->command; /* == status reg */
1007 * Fill in Extend bit, and the high order bytes
1010 if (tf->flags & ATA_TFLAG_LBA48) {
1012 desc[4] = tf->hob_nsect;
1013 desc[6] = tf->hob_lbal;
1014 desc[8] = tf->hob_lbam;
1015 desc[10] = tf->hob_lbah;
1020 * ata_gen_ata_sense - generate a SCSI fixed sense block
1021 * @qc: Command that we are erroring out
1023 * Generate sense block for a failed ATA command @qc. Descriptor
1024 * format is used to accommodate LBA48 block address.
1029 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1031 struct ata_device *dev = qc->dev;
1032 struct scsi_cmnd *cmd = qc->scsicmd;
1033 struct ata_taskfile *tf = &qc->result_tf;
1034 unsigned char *sb = cmd->sense_buffer;
1035 unsigned char *desc = sb + 8;
1036 int verbose = qc->ap->ops->error_handler == NULL;
1039 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1041 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1043 /* sense data is current and format is descriptor */
1046 /* Use ata_to_sense_error() to map status register bits
1047 * onto sense key, asc & ascq.
1050 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1051 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1052 &sb[1], &sb[2], &sb[3], verbose);
1056 block = ata_tf_read_block(&qc->result_tf, dev);
1058 /* information sense data descriptor */
1063 desc[2] |= 0x80; /* valid */
1064 desc[6] = block >> 40;
1065 desc[7] = block >> 32;
1066 desc[8] = block >> 24;
1067 desc[9] = block >> 16;
1068 desc[10] = block >> 8;
1072 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1074 sdev->use_10_for_rw = 1;
1075 sdev->use_10_for_ms = 1;
1076 sdev->no_report_opcodes = 1;
1077 sdev->no_write_same = 1;
1079 /* Schedule policy is determined by ->qc_defer() callback and
1080 * it needs to see every deferred qc. Set dev_blocked to 1 to
1081 * prevent SCSI midlayer from automatically deferring
1084 sdev->max_device_blocked = 1;
1088 * atapi_drain_needed - Check whether data transfer may overflow
1089 * @rq: request to be checked
1091 * ATAPI commands which transfer variable length data to host
1092 * might overflow due to application error or hardare bug. This
1093 * function checks whether overflow should be drained and ignored
1100 * 1 if ; otherwise, 0.
1102 static int atapi_drain_needed(struct request *rq)
1104 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
1107 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
1110 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1113 static int ata_scsi_dev_config(struct scsi_device *sdev,
1114 struct ata_device *dev)
1116 struct request_queue *q = sdev->request_queue;
1118 if (!ata_id_has_unload(dev->id))
1119 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1121 /* configure max sectors */
1122 blk_queue_max_hw_sectors(q, dev->max_sectors);
1124 if (dev->class == ATA_DEV_ATAPI) {
1127 sdev->sector_size = ATA_SECT_SIZE;
1129 /* set DMA padding */
1130 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1132 /* configure draining */
1133 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1135 ata_dev_err(dev, "drain buffer allocation failed\n");
1139 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1141 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1142 sdev->manage_start_stop = 1;
1146 * ata_pio_sectors() expects buffer for each sector to not cross
1147 * page boundary. Enforce it by requiring buffers to be sector
1148 * aligned, which works iff sector_size is not larger than
1149 * PAGE_SIZE. ATAPI devices also need the alignment as
1150 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1152 if (sdev->sector_size > PAGE_SIZE)
1154 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1157 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1159 if (dev->flags & ATA_DFLAG_AN)
1160 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1162 if (dev->flags & ATA_DFLAG_NCQ) {
1165 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1166 depth = min(ATA_MAX_QUEUE - 1, depth);
1167 scsi_change_queue_depth(sdev, depth);
1170 blk_queue_flush_queueable(q, false);
1177 * ata_scsi_slave_config - Set SCSI device attributes
1178 * @sdev: SCSI device to examine
1180 * This is called before we actually start reading
1181 * and writing to the device, to configure certain
1182 * SCSI mid-layer behaviors.
1185 * Defined by SCSI layer. We don't really care.
1188 int ata_scsi_slave_config(struct scsi_device *sdev)
1190 struct ata_port *ap = ata_shost_to_port(sdev->host);
1191 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1194 ata_scsi_sdev_config(sdev);
1197 rc = ata_scsi_dev_config(sdev, dev);
1203 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1204 * @sdev: SCSI device to be destroyed
1206 * @sdev is about to be destroyed for hot/warm unplugging. If
1207 * this unplugging was initiated by libata as indicated by NULL
1208 * dev->sdev, this function doesn't have to do anything.
1209 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1210 * Clear dev->sdev, schedule the device for ATA detach and invoke
1214 * Defined by SCSI layer. We don't really care.
1216 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1218 struct ata_port *ap = ata_shost_to_port(sdev->host);
1219 struct request_queue *q = sdev->request_queue;
1220 unsigned long flags;
1221 struct ata_device *dev;
1223 if (!ap->ops->error_handler)
1226 spin_lock_irqsave(ap->lock, flags);
1227 dev = __ata_scsi_find_dev(ap, sdev);
1228 if (dev && dev->sdev) {
1229 /* SCSI device already in CANCEL state, no need to offline it */
1231 dev->flags |= ATA_DFLAG_DETACH;
1232 ata_port_schedule_eh(ap);
1234 spin_unlock_irqrestore(ap->lock, flags);
1236 kfree(q->dma_drain_buffer);
1237 q->dma_drain_buffer = NULL;
1238 q->dma_drain_size = 0;
1242 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1243 * @ap: ATA port to which the device change the queue depth
1244 * @sdev: SCSI device to configure queue depth for
1245 * @queue_depth: new queue depth
1247 * libsas and libata have different approaches for associating a sdev to
1251 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1254 struct ata_device *dev;
1255 unsigned long flags;
1257 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1258 return sdev->queue_depth;
1260 dev = ata_scsi_find_dev(ap, sdev);
1261 if (!dev || !ata_dev_enabled(dev))
1262 return sdev->queue_depth;
1265 spin_lock_irqsave(ap->lock, flags);
1266 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1267 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1268 dev->flags |= ATA_DFLAG_NCQ_OFF;
1271 spin_unlock_irqrestore(ap->lock, flags);
1273 /* limit and apply queue depth */
1274 queue_depth = min(queue_depth, sdev->host->can_queue);
1275 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1276 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1278 if (sdev->queue_depth == queue_depth)
1281 return scsi_change_queue_depth(sdev, queue_depth);
1285 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1286 * @sdev: SCSI device to configure queue depth for
1287 * @queue_depth: new queue depth
1289 * This is libata standard hostt->change_queue_depth callback.
1290 * SCSI will call into this callback when user tries to set queue
1294 * SCSI layer (we don't care)
1297 * Newly configured queue depth.
1299 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1301 struct ata_port *ap = ata_shost_to_port(sdev->host);
1303 return __ata_change_queue_depth(ap, sdev, queue_depth);
1307 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1308 * @qc: Storage for translated ATA taskfile
1310 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1311 * (to start). Perhaps these commands should be preceded by
1312 * CHECK POWER MODE to see what power mode the device is already in.
1313 * [See SAT revision 5 at www.t10.org]
1316 * spin_lock_irqsave(host lock)
1319 * Zero on success, non-zero on error.
1321 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1323 struct scsi_cmnd *scmd = qc->scsicmd;
1324 struct ata_taskfile *tf = &qc->tf;
1325 const u8 *cdb = scmd->cmnd;
1327 if (scmd->cmd_len < 5)
1330 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1331 tf->protocol = ATA_PROT_NODATA;
1333 ; /* ignore IMMED bit, violates sat-r05 */
1336 goto invalid_fld; /* LOEJ bit set not supported */
1337 if (((cdb[4] >> 4) & 0xf) != 0)
1338 goto invalid_fld; /* power conditions not supported */
1341 tf->nsect = 1; /* 1 sector, lba=0 */
1343 if (qc->dev->flags & ATA_DFLAG_LBA) {
1344 tf->flags |= ATA_TFLAG_LBA;
1349 tf->device |= ATA_LBA;
1352 tf->lbal = 0x1; /* sect */
1353 tf->lbam = 0x0; /* cyl low */
1354 tf->lbah = 0x0; /* cyl high */
1357 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1359 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1360 * or S5) causing some drives to spin up and down again.
1362 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1363 system_state == SYSTEM_POWER_OFF)
1366 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1367 system_entering_hibernation())
1370 /* Issue ATA STANDBY IMMEDIATE command */
1371 tf->command = ATA_CMD_STANDBYNOW1;
1375 * Standby and Idle condition timers could be implemented but that
1376 * would require libata to implement the Power condition mode page
1377 * and allow the user to change it. Changing mode pages requires
1378 * MODE SELECT to be implemented.
1384 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1385 /* "Invalid field in cbd" */
1388 scmd->result = SAM_STAT_GOOD;
1394 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1395 * @qc: Storage for translated ATA taskfile
1397 * Sets up an ATA taskfile to issue FLUSH CACHE or
1401 * spin_lock_irqsave(host lock)
1404 * Zero on success, non-zero on error.
1406 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1408 struct ata_taskfile *tf = &qc->tf;
1410 tf->flags |= ATA_TFLAG_DEVICE;
1411 tf->protocol = ATA_PROT_NODATA;
1413 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1414 tf->command = ATA_CMD_FLUSH_EXT;
1416 tf->command = ATA_CMD_FLUSH;
1418 /* flush is critical for IO integrity, consider it an IO command */
1419 qc->flags |= ATA_QCFLAG_IO;
1425 * scsi_6_lba_len - Get LBA and transfer length
1426 * @cdb: SCSI command to translate
1428 * Calculate LBA and transfer length for 6-byte commands.
1432 * @plen: the transfer length
1434 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1439 VPRINTK("six-byte command\n");
1441 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1442 lba |= ((u64)cdb[2]) << 8;
1443 lba |= ((u64)cdb[3]);
1452 * scsi_10_lba_len - Get LBA and transfer length
1453 * @cdb: SCSI command to translate
1455 * Calculate LBA and transfer length for 10-byte commands.
1459 * @plen: the transfer length
1461 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1466 VPRINTK("ten-byte command\n");
1468 lba |= ((u64)cdb[2]) << 24;
1469 lba |= ((u64)cdb[3]) << 16;
1470 lba |= ((u64)cdb[4]) << 8;
1471 lba |= ((u64)cdb[5]);
1473 len |= ((u32)cdb[7]) << 8;
1474 len |= ((u32)cdb[8]);
1481 * scsi_16_lba_len - Get LBA and transfer length
1482 * @cdb: SCSI command to translate
1484 * Calculate LBA and transfer length for 16-byte commands.
1488 * @plen: the transfer length
1490 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1495 VPRINTK("sixteen-byte command\n");
1497 lba |= ((u64)cdb[2]) << 56;
1498 lba |= ((u64)cdb[3]) << 48;
1499 lba |= ((u64)cdb[4]) << 40;
1500 lba |= ((u64)cdb[5]) << 32;
1501 lba |= ((u64)cdb[6]) << 24;
1502 lba |= ((u64)cdb[7]) << 16;
1503 lba |= ((u64)cdb[8]) << 8;
1504 lba |= ((u64)cdb[9]);
1506 len |= ((u32)cdb[10]) << 24;
1507 len |= ((u32)cdb[11]) << 16;
1508 len |= ((u32)cdb[12]) << 8;
1509 len |= ((u32)cdb[13]);
1516 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1517 * @qc: Storage for translated ATA taskfile
1519 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1522 * spin_lock_irqsave(host lock)
1525 * Zero on success, non-zero on error.
1527 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1529 struct scsi_cmnd *scmd = qc->scsicmd;
1530 struct ata_taskfile *tf = &qc->tf;
1531 struct ata_device *dev = qc->dev;
1532 u64 dev_sectors = qc->dev->n_sectors;
1533 const u8 *cdb = scmd->cmnd;
1537 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1538 tf->protocol = ATA_PROT_NODATA;
1540 if (cdb[0] == VERIFY) {
1541 if (scmd->cmd_len < 10)
1543 scsi_10_lba_len(cdb, &block, &n_block);
1544 } else if (cdb[0] == VERIFY_16) {
1545 if (scmd->cmd_len < 16)
1547 scsi_16_lba_len(cdb, &block, &n_block);
1553 if (block >= dev_sectors)
1555 if ((block + n_block) > dev_sectors)
1558 if (dev->flags & ATA_DFLAG_LBA) {
1559 tf->flags |= ATA_TFLAG_LBA;
1561 if (lba_28_ok(block, n_block)) {
1563 tf->command = ATA_CMD_VERIFY;
1564 tf->device |= (block >> 24) & 0xf;
1565 } else if (lba_48_ok(block, n_block)) {
1566 if (!(dev->flags & ATA_DFLAG_LBA48))
1570 tf->flags |= ATA_TFLAG_LBA48;
1571 tf->command = ATA_CMD_VERIFY_EXT;
1573 tf->hob_nsect = (n_block >> 8) & 0xff;
1575 tf->hob_lbah = (block >> 40) & 0xff;
1576 tf->hob_lbam = (block >> 32) & 0xff;
1577 tf->hob_lbal = (block >> 24) & 0xff;
1579 /* request too large even for LBA48 */
1582 tf->nsect = n_block & 0xff;
1584 tf->lbah = (block >> 16) & 0xff;
1585 tf->lbam = (block >> 8) & 0xff;
1586 tf->lbal = block & 0xff;
1588 tf->device |= ATA_LBA;
1591 u32 sect, head, cyl, track;
1593 if (!lba_28_ok(block, n_block))
1596 /* Convert LBA to CHS */
1597 track = (u32)block / dev->sectors;
1598 cyl = track / dev->heads;
1599 head = track % dev->heads;
1600 sect = (u32)block % dev->sectors + 1;
1602 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1603 (u32)block, track, cyl, head, sect);
1605 /* Check whether the converted CHS can fit.
1609 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1612 tf->command = ATA_CMD_VERIFY;
1613 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1616 tf->lbah = cyl >> 8;
1623 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1624 /* "Invalid field in cbd" */
1628 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1629 /* "Logical Block Address out of range" */
1633 scmd->result = SAM_STAT_GOOD;
1638 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1639 * @qc: Storage for translated ATA taskfile
1641 * Converts any of six SCSI read/write commands into the
1642 * ATA counterpart, including starting sector (LBA),
1643 * sector count, and taking into account the device's LBA48
1646 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1647 * %WRITE_16 are currently supported.
1650 * spin_lock_irqsave(host lock)
1653 * Zero on success, non-zero on error.
1655 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1657 struct scsi_cmnd *scmd = qc->scsicmd;
1658 const u8 *cdb = scmd->cmnd;
1659 unsigned int tf_flags = 0;
1664 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1665 tf_flags |= ATA_TFLAG_WRITE;
1667 /* Calculate the SCSI LBA, transfer length and FUA. */
1671 if (unlikely(scmd->cmd_len < 10))
1673 scsi_10_lba_len(cdb, &block, &n_block);
1674 if (cdb[1] & (1 << 3))
1675 tf_flags |= ATA_TFLAG_FUA;
1679 if (unlikely(scmd->cmd_len < 6))
1681 scsi_6_lba_len(cdb, &block, &n_block);
1683 /* for 6-byte r/w commands, transfer length 0
1684 * means 256 blocks of data, not 0 block.
1691 if (unlikely(scmd->cmd_len < 16))
1693 scsi_16_lba_len(cdb, &block, &n_block);
1694 if (cdb[1] & (1 << 3))
1695 tf_flags |= ATA_TFLAG_FUA;
1698 DPRINTK("no-byte command\n");
1702 /* Check and compose ATA command */
1704 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1705 * length 0 means transfer 0 block of data.
1706 * However, for ATA R/W commands, sector count 0 means
1707 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1709 * WARNING: one or two older ATA drives treat 0 as 0...
1713 qc->flags |= ATA_QCFLAG_IO;
1714 qc->nbytes = n_block * scmd->device->sector_size;
1716 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1718 if (likely(rc == 0))
1723 /* treat all other errors as -EINVAL, fall through */
1725 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1726 /* "Invalid field in cbd" */
1730 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1731 /* "Logical Block Address out of range" */
1735 scmd->result = SAM_STAT_GOOD;
1739 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1741 struct ata_port *ap = qc->ap;
1742 struct scsi_cmnd *cmd = qc->scsicmd;
1743 u8 *cdb = cmd->cmnd;
1744 int need_sense = (qc->err_mask != 0);
1746 /* For ATA pass thru (SAT) commands, generate a sense block if
1747 * user mandated it or if there's an error. Note that if we
1748 * generate because the user forced us to [CK_COND =1], a check
1749 * condition is generated and the ATA register values are returned
1750 * whether the command completed successfully or not. If there
1751 * was no error, we use the following sense data:
1752 * sk = RECOVERED ERROR
1753 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1755 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1756 ((cdb[2] & 0x20) || need_sense)) {
1757 ata_gen_passthru_sense(qc);
1760 cmd->result = SAM_STAT_GOOD;
1762 /* TODO: decide which descriptor format to use
1763 * for 48b LBA devices and call that here
1764 * instead of the fixed desc, which is only
1765 * good for smaller LBA (and maybe CHS?)
1768 ata_gen_ata_sense(qc);
1772 if (need_sense && !ap->ops->error_handler)
1773 ata_dump_status(ap->print_id, &qc->result_tf);
1781 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1782 * @dev: ATA device to which the command is addressed
1783 * @cmd: SCSI command to execute
1784 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1786 * Our ->queuecommand() function has decided that the SCSI
1787 * command issued can be directly translated into an ATA
1788 * command, rather than handled internally.
1790 * This function sets up an ata_queued_cmd structure for the
1791 * SCSI command, and sends that ata_queued_cmd to the hardware.
1793 * The xlat_func argument (actor) returns 0 if ready to execute
1794 * ATA command, else 1 to finish translation. If 1 is returned
1795 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1796 * to be set reflecting an error condition or clean (early)
1800 * spin_lock_irqsave(host lock)
1803 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1804 * needs to be deferred.
1806 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1807 ata_xlat_func_t xlat_func)
1809 struct ata_port *ap = dev->link->ap;
1810 struct ata_queued_cmd *qc;
1815 qc = ata_scsi_qc_new(dev, cmd);
1819 /* data is present; dma-map it */
1820 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1821 cmd->sc_data_direction == DMA_TO_DEVICE) {
1822 if (unlikely(scsi_bufflen(cmd) < 1)) {
1823 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
1827 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1829 qc->dma_dir = cmd->sc_data_direction;
1832 qc->complete_fn = ata_scsi_qc_complete;
1837 if (ap->ops->qc_defer) {
1838 if ((rc = ap->ops->qc_defer(qc)))
1842 /* select device, send command to hardware */
1850 cmd->scsi_done(cmd);
1851 DPRINTK("EXIT - early finish (good or error)\n");
1856 cmd->result = (DID_ERROR << 16);
1857 cmd->scsi_done(cmd);
1859 DPRINTK("EXIT - internal\n");
1864 DPRINTK("EXIT - defer\n");
1865 if (rc == ATA_DEFER_LINK)
1866 return SCSI_MLQUEUE_DEVICE_BUSY;
1868 return SCSI_MLQUEUE_HOST_BUSY;
1872 * ata_scsi_rbuf_get - Map response buffer.
1873 * @cmd: SCSI command containing buffer to be mapped.
1874 * @flags: unsigned long variable to store irq enable status
1875 * @copy_in: copy in from user buffer
1877 * Prepare buffer for simulated SCSI commands.
1880 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1883 * Pointer to response buffer.
1885 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1886 unsigned long *flags)
1888 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1890 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1892 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1893 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1894 return ata_scsi_rbuf;
1898 * ata_scsi_rbuf_put - Unmap response buffer.
1899 * @cmd: SCSI command containing buffer to be unmapped.
1900 * @copy_out: copy out result
1901 * @flags: @flags passed to ata_scsi_rbuf_get()
1903 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1904 * @copy_back is true.
1907 * Unlocks ata_scsi_rbuf_lock.
1909 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1910 unsigned long *flags)
1913 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1914 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1915 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1919 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1920 * @args: device IDENTIFY data / SCSI command of interest.
1921 * @actor: Callback hook for desired SCSI command simulator
1923 * Takes care of the hard work of simulating a SCSI command...
1924 * Mapping the response buffer, calling the command's handler,
1925 * and handling the handler's return value. This return value
1926 * indicates whether the handler wishes the SCSI command to be
1927 * completed successfully (0), or not (in which case cmd->result
1928 * and sense buffer are assumed to be set).
1931 * spin_lock_irqsave(host lock)
1933 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1934 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1938 struct scsi_cmnd *cmd = args->cmd;
1939 unsigned long flags;
1941 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1942 rc = actor(args, rbuf);
1943 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
1946 cmd->result = SAM_STAT_GOOD;
1951 * ata_scsiop_inq_std - Simulate INQUIRY command
1952 * @args: device IDENTIFY data / SCSI command of interest.
1953 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1955 * Returns standard device identification data associated
1956 * with non-VPD INQUIRY command output.
1959 * spin_lock_irqsave(host lock)
1961 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1963 const u8 versions[] = {
1964 0x60, /* SAM-3 (no version claimed) */
1967 0x20, /* SBC-2 (no version claimed) */
1970 0x60 /* SPC-3 (no version claimed) */
1975 0x5, /* claim SPC-3 version compatibility */
1982 /* set scsi removeable (RMB) bit per ata bit */
1983 if (ata_id_removeable(args->id))
1986 memcpy(rbuf, hdr, sizeof(hdr));
1987 memcpy(&rbuf[8], "ATA ", 8);
1988 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1990 /* From SAT, use last 2 words from fw rev unless they are spaces */
1991 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
1992 if (strncmp(&rbuf[32], " ", 4) == 0)
1993 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1995 if (rbuf[32] == 0 || rbuf[32] == ' ')
1996 memcpy(&rbuf[32], "n/a ", 4);
1998 memcpy(rbuf + 59, versions, sizeof(versions));
2004 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2005 * @args: device IDENTIFY data / SCSI command of interest.
2006 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2008 * Returns list of inquiry VPD pages available.
2011 * spin_lock_irqsave(host lock)
2013 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
2015 const u8 pages[] = {
2016 0x00, /* page 0x00, this page */
2017 0x80, /* page 0x80, unit serial no page */
2018 0x83, /* page 0x83, device ident page */
2019 0x89, /* page 0x89, ata info page */
2020 0xb0, /* page 0xb0, block limits page */
2021 0xb1, /* page 0xb1, block device characteristics page */
2022 0xb2, /* page 0xb2, thin provisioning page */
2025 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
2026 memcpy(rbuf + 4, pages, sizeof(pages));
2031 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2032 * @args: device IDENTIFY data / SCSI command of interest.
2033 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2035 * Returns ATA device serial number.
2038 * spin_lock_irqsave(host lock)
2040 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2044 0x80, /* this page code */
2046 ATA_ID_SERNO_LEN, /* page len */
2049 memcpy(rbuf, hdr, sizeof(hdr));
2050 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2051 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2056 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2057 * @args: device IDENTIFY data / SCSI command of interest.
2058 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2060 * Yields two logical unit device identification designators:
2061 * - vendor specific ASCII containing the ATA serial number
2062 * - SAT defined "t10 vendor id based" containing ASCII vendor
2063 * name ("ATA "), model and serial numbers.
2066 * spin_lock_irqsave(host lock)
2068 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2070 const int sat_model_serial_desc_len = 68;
2073 rbuf[1] = 0x83; /* this page code */
2076 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2078 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2080 ata_id_string(args->id, (unsigned char *) rbuf + num,
2081 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2082 num += ATA_ID_SERNO_LEN;
2084 /* SAT defined lu model and serial numbers descriptor */
2085 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2088 rbuf[num + 3] = sat_model_serial_desc_len;
2090 memcpy(rbuf + num, "ATA ", 8);
2092 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2094 num += ATA_ID_PROD_LEN;
2095 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2097 num += ATA_ID_SERNO_LEN;
2099 if (ata_id_has_wwn(args->id)) {
2100 /* SAT defined lu world wide name */
2101 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2104 rbuf[num + 3] = ATA_ID_WWN_LEN;
2106 ata_id_string(args->id, (unsigned char *) rbuf + num,
2107 ATA_ID_WWN, ATA_ID_WWN_LEN);
2108 num += ATA_ID_WWN_LEN;
2110 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2115 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2116 * @args: device IDENTIFY data / SCSI command of interest.
2117 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2119 * Yields SAT-specified ATA VPD page.
2122 * spin_lock_irqsave(host lock)
2124 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2126 struct ata_taskfile tf;
2128 memset(&tf, 0, sizeof(tf));
2130 rbuf[1] = 0x89; /* our page code */
2131 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2132 rbuf[3] = (0x238 & 0xff);
2134 memcpy(&rbuf[8], "linux ", 8);
2135 memcpy(&rbuf[16], "libata ", 16);
2136 memcpy(&rbuf[32], DRV_VERSION, 4);
2138 /* we don't store the ATA device signature, so we fake it */
2140 tf.command = ATA_DRDY; /* really, this is Status reg */
2144 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2145 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2147 rbuf[56] = ATA_CMD_ID_ATA;
2149 memcpy(&rbuf[60], &args->id[0], 512);
2153 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2158 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2161 * Optimal transfer length granularity.
2163 * This is always one physical block, but for disks with a smaller
2164 * logical than physical sector size we need to figure out what the
2167 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2168 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2171 * Optimal unmap granularity.
2173 * The ATA spec doesn't even know about a granularity or alignment
2174 * for the TRIM command. We can leave away most of the unmap related
2175 * VPD page entries, but we have specifify a granularity to signal
2176 * that we support some form of unmap - in thise case via WRITE SAME
2177 * with the unmap bit set.
2179 if (ata_id_has_trim(args->id)) {
2180 put_unaligned_be64(65535 * 512 / 8, &rbuf[36]);
2181 put_unaligned_be32(1, &rbuf[28]);
2187 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2189 int form_factor = ata_id_form_factor(args->id);
2190 int media_rotation_rate = ata_id_rotation_rate(args->id);
2194 rbuf[4] = media_rotation_rate >> 8;
2195 rbuf[5] = media_rotation_rate;
2196 rbuf[7] = form_factor;
2201 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2203 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2206 rbuf[5] = 1 << 6; /* TPWS */
2212 * ata_scsiop_noop - Command handler that simply returns success.
2213 * @args: device IDENTIFY data / SCSI command of interest.
2214 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2216 * No operation. Simply returns success to caller, to indicate
2217 * that the caller should successfully complete this SCSI command.
2220 * spin_lock_irqsave(host lock)
2222 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
2229 * modecpy - Prepare response for MODE SENSE
2230 * @dest: output buffer
2231 * @src: data being copied
2232 * @n: length of mode page
2233 * @changeable: whether changeable parameters are requested
2235 * Generate a generic MODE SENSE page for either current or changeable
2241 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2244 memcpy(dest, src, 2);
2245 memset(dest + 2, 0, n - 2);
2247 memcpy(dest, src, n);
2252 * ata_msense_caching - Simulate MODE SENSE caching info page
2253 * @id: device IDENTIFY data
2254 * @buf: output buffer
2255 * @changeable: whether changeable parameters are requested
2257 * Generate a caching info page, which conditionally indicates
2258 * write caching to the SCSI layer, depending on device
2264 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2266 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2267 if (changeable || ata_id_wcache_enabled(id))
2268 buf[2] |= (1 << 2); /* write cache enable */
2269 if (!changeable && !ata_id_rahead_enabled(id))
2270 buf[12] |= (1 << 5); /* disable read ahead */
2271 return sizeof(def_cache_mpage);
2275 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2276 * @buf: output buffer
2277 * @changeable: whether changeable parameters are requested
2279 * Generate a generic MODE SENSE control mode page.
2284 static unsigned int ata_msense_ctl_mode(u8 *buf, bool changeable)
2286 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2287 return sizeof(def_control_mpage);
2291 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2292 * @buf: output buffer
2293 * @changeable: whether changeable parameters are requested
2295 * Generate a generic MODE SENSE r/w error recovery page.
2300 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2302 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2304 return sizeof(def_rw_recovery_mpage);
2308 * We can turn this into a real blacklist if it's needed, for now just
2309 * blacklist any Maxtor BANC1G10 revision firmware
2311 static int ata_dev_supports_fua(u16 *id)
2313 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2317 if (!ata_id_has_fua(id))
2320 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2321 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2323 if (strcmp(model, "Maxtor"))
2325 if (strcmp(fw, "BANC1G10"))
2328 return 0; /* blacklisted */
2332 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2333 * @args: device IDENTIFY data / SCSI command of interest.
2334 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2336 * Simulate MODE SENSE commands. Assume this is invoked for direct
2337 * access devices (e.g. disks) only. There should be no block
2338 * descriptor for other device types.
2341 * spin_lock_irqsave(host lock)
2343 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2345 struct ata_device *dev = args->dev;
2346 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2347 const u8 sat_blk_desc[] = {
2348 0, 0, 0, 0, /* number of blocks: sat unspecified */
2350 0, 0x2, 0x0 /* block length: 512 bytes */
2353 unsigned int ebd, page_control, six_byte;
2358 six_byte = (scsicmd[0] == MODE_SENSE);
2359 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2361 * LLBA bit in msense(10) ignored (compliant)
2364 page_control = scsicmd[2] >> 6;
2365 switch (page_control) {
2366 case 0: /* current */
2367 case 1: /* changeable */
2368 case 2: /* defaults */
2369 break; /* supported */
2371 goto saving_not_supp;
2377 p += 4 + (ebd ? 8 : 0);
2379 p += 8 + (ebd ? 8 : 0);
2381 pg = scsicmd[2] & 0x3f;
2384 * No mode subpages supported (yet) but asking for _all_
2385 * subpages may be valid
2387 if (spg && (spg != ALL_SUB_MPAGES))
2391 case RW_RECOVERY_MPAGE:
2392 p += ata_msense_rw_recovery(p, page_control == 1);
2396 p += ata_msense_caching(args->id, p, page_control == 1);
2400 p += ata_msense_ctl_mode(p, page_control == 1);
2404 p += ata_msense_rw_recovery(p, page_control == 1);
2405 p += ata_msense_caching(args->id, p, page_control == 1);
2406 p += ata_msense_ctl_mode(p, page_control == 1);
2409 default: /* invalid page code */
2414 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2415 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2419 rbuf[0] = p - rbuf - 1;
2422 rbuf[3] = sizeof(sat_blk_desc);
2423 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2426 unsigned int output_len = p - rbuf - 2;
2428 rbuf[0] = output_len >> 8;
2429 rbuf[1] = output_len;
2432 rbuf[7] = sizeof(sat_blk_desc);
2433 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2439 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2440 /* "Invalid field in cbd" */
2444 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2445 /* "Saving parameters not supported" */
2450 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2451 * @args: device IDENTIFY data / SCSI command of interest.
2452 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2454 * Simulate READ CAPACITY commands.
2459 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2461 struct ata_device *dev = args->dev;
2462 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2463 u32 sector_size; /* physical sector size in bytes */
2467 sector_size = ata_id_logical_sector_size(dev->id);
2468 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2469 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2473 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2474 if (last_lba >= 0xffffffffULL)
2475 last_lba = 0xffffffff;
2477 /* sector count, 32-bit */
2478 rbuf[0] = last_lba >> (8 * 3);
2479 rbuf[1] = last_lba >> (8 * 2);
2480 rbuf[2] = last_lba >> (8 * 1);
2484 rbuf[4] = sector_size >> (8 * 3);
2485 rbuf[5] = sector_size >> (8 * 2);
2486 rbuf[6] = sector_size >> (8 * 1);
2487 rbuf[7] = sector_size;
2489 /* sector count, 64-bit */
2490 rbuf[0] = last_lba >> (8 * 7);
2491 rbuf[1] = last_lba >> (8 * 6);
2492 rbuf[2] = last_lba >> (8 * 5);
2493 rbuf[3] = last_lba >> (8 * 4);
2494 rbuf[4] = last_lba >> (8 * 3);
2495 rbuf[5] = last_lba >> (8 * 2);
2496 rbuf[6] = last_lba >> (8 * 1);
2500 rbuf[ 8] = sector_size >> (8 * 3);
2501 rbuf[ 9] = sector_size >> (8 * 2);
2502 rbuf[10] = sector_size >> (8 * 1);
2503 rbuf[11] = sector_size;
2506 rbuf[13] = log2_per_phys;
2507 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2508 rbuf[15] = lowest_aligned;
2510 if (ata_id_has_trim(args->id)) {
2511 rbuf[14] |= 0x80; /* TPE */
2513 if (ata_id_has_zero_after_trim(args->id))
2514 rbuf[14] |= 0x40; /* TPRZ */
2522 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2523 * @args: device IDENTIFY data / SCSI command of interest.
2524 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2526 * Simulate REPORT LUNS command.
2529 * spin_lock_irqsave(host lock)
2531 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2534 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2539 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2541 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2542 /* FIXME: not quite right; we don't want the
2543 * translation of taskfile registers into
2544 * a sense descriptors, since that's only
2545 * correct for ATA, not ATAPI
2547 ata_gen_passthru_sense(qc);
2550 qc->scsidone(qc->scsicmd);
2554 /* is it pointless to prefer PIO for "safety reasons"? */
2555 static inline int ata_pio_use_silly(struct ata_port *ap)
2557 return (ap->flags & ATA_FLAG_PIO_DMA);
2560 static void atapi_request_sense(struct ata_queued_cmd *qc)
2562 struct ata_port *ap = qc->ap;
2563 struct scsi_cmnd *cmd = qc->scsicmd;
2565 DPRINTK("ATAPI request sense\n");
2567 /* FIXME: is this needed? */
2568 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2570 #ifdef CONFIG_ATA_SFF
2571 if (ap->ops->sff_tf_read)
2572 ap->ops->sff_tf_read(ap, &qc->tf);
2575 /* fill these in, for the case where they are -not- overwritten */
2576 cmd->sense_buffer[0] = 0x70;
2577 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2581 /* setup sg table and init transfer direction */
2582 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2583 ata_sg_init(qc, &qc->sgent, 1);
2584 qc->dma_dir = DMA_FROM_DEVICE;
2586 memset(&qc->cdb, 0, qc->dev->cdb_len);
2587 qc->cdb[0] = REQUEST_SENSE;
2588 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2590 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2591 qc->tf.command = ATA_CMD_PACKET;
2593 if (ata_pio_use_silly(ap)) {
2594 qc->tf.protocol = ATAPI_PROT_DMA;
2595 qc->tf.feature |= ATAPI_PKT_DMA;
2597 qc->tf.protocol = ATAPI_PROT_PIO;
2598 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2601 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2603 qc->complete_fn = atapi_sense_complete;
2610 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2612 struct scsi_cmnd *cmd = qc->scsicmd;
2613 unsigned int err_mask = qc->err_mask;
2615 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2617 /* handle completion from new EH */
2618 if (unlikely(qc->ap->ops->error_handler &&
2619 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2621 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2622 /* FIXME: not quite right; we don't want the
2623 * translation of taskfile registers into a
2624 * sense descriptors, since that's only
2625 * correct for ATA, not ATAPI
2627 ata_gen_passthru_sense(qc);
2630 /* SCSI EH automatically locks door if sdev->locked is
2631 * set. Sometimes door lock request continues to
2632 * fail, for example, when no media is present. This
2633 * creates a loop - SCSI EH issues door lock which
2634 * fails and gets invoked again to acquire sense data
2635 * for the failed command.
2637 * If door lock fails, always clear sdev->locked to
2638 * avoid this infinite loop.
2640 * This may happen before SCSI scan is complete. Make
2641 * sure qc->dev->sdev isn't NULL before dereferencing.
2643 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2644 qc->dev->sdev->locked = 0;
2646 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2652 /* successful completion or old EH failure path */
2653 if (unlikely(err_mask & AC_ERR_DEV)) {
2654 cmd->result = SAM_STAT_CHECK_CONDITION;
2655 atapi_request_sense(qc);
2657 } else if (unlikely(err_mask)) {
2658 /* FIXME: not quite right; we don't want the
2659 * translation of taskfile registers into
2660 * a sense descriptors, since that's only
2661 * correct for ATA, not ATAPI
2663 ata_gen_passthru_sense(qc);
2665 u8 *scsicmd = cmd->cmnd;
2667 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2668 unsigned long flags;
2671 buf = ata_scsi_rbuf_get(cmd, true, &flags);
2673 /* ATAPI devices typically report zero for their SCSI version,
2674 * and sometimes deviate from the spec WRT response data
2675 * format. If SCSI version is reported as zero like normal,
2676 * then we make the following fixups: 1) Fake MMC-5 version,
2677 * to indicate to the Linux scsi midlayer this is a modern
2678 * device. 2) Ensure response data format / ATAPI information
2679 * are always correct.
2686 ata_scsi_rbuf_put(cmd, true, &flags);
2689 cmd->result = SAM_STAT_GOOD;
2696 * atapi_xlat - Initialize PACKET taskfile
2697 * @qc: command structure to be initialized
2700 * spin_lock_irqsave(host lock)
2703 * Zero on success, non-zero on failure.
2705 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2707 struct scsi_cmnd *scmd = qc->scsicmd;
2708 struct ata_device *dev = qc->dev;
2709 int nodata = (scmd->sc_data_direction == DMA_NONE);
2710 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2711 unsigned int nbytes;
2713 memset(qc->cdb, 0, dev->cdb_len);
2714 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2716 qc->complete_fn = atapi_qc_complete;
2718 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2719 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2720 qc->tf.flags |= ATA_TFLAG_WRITE;
2721 DPRINTK("direction: write\n");
2724 qc->tf.command = ATA_CMD_PACKET;
2725 ata_qc_set_pc_nbytes(qc);
2727 /* check whether ATAPI DMA is safe */
2728 if (!nodata && !using_pio && atapi_check_dma(qc))
2731 /* Some controller variants snoop this value for Packet
2732 * transfers to do state machine and FIFO management. Thus we
2733 * want to set it properly, and for DMA where it is
2734 * effectively meaningless.
2736 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2738 /* Most ATAPI devices which honor transfer chunk size don't
2739 * behave according to the spec when odd chunk size which
2740 * matches the transfer length is specified. If the number of
2741 * bytes to transfer is 2n+1. According to the spec, what
2742 * should happen is to indicate that 2n+1 is going to be
2743 * transferred and transfer 2n+2 bytes where the last byte is
2746 * In practice, this doesn't happen. ATAPI devices first
2747 * indicate and transfer 2n bytes and then indicate and
2748 * transfer 2 bytes where the last byte is padding.
2750 * This inconsistency confuses several controllers which
2751 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2752 * These controllers use actual number of transferred bytes to
2753 * update DMA poitner and transfer of 4n+2 bytes make those
2754 * controller push DMA pointer by 4n+4 bytes because SATA data
2755 * FISes are aligned to 4 bytes. This causes data corruption
2756 * and buffer overrun.
2758 * Always setting nbytes to even number solves this problem
2759 * because then ATAPI devices don't have to split data at 2n
2765 qc->tf.lbam = (nbytes & 0xFF);
2766 qc->tf.lbah = (nbytes >> 8);
2769 qc->tf.protocol = ATAPI_PROT_NODATA;
2771 qc->tf.protocol = ATAPI_PROT_PIO;
2774 qc->tf.protocol = ATAPI_PROT_DMA;
2775 qc->tf.feature |= ATAPI_PKT_DMA;
2777 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2778 (scmd->sc_data_direction != DMA_TO_DEVICE))
2779 /* some SATA bridges need us to indicate data xfer direction */
2780 qc->tf.feature |= ATAPI_DMADIR;
2784 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2785 as ATAPI tape drives don't get this right otherwise */
2789 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2791 if (!sata_pmp_attached(ap)) {
2792 if (likely(devno < ata_link_max_devices(&ap->link)))
2793 return &ap->link.device[devno];
2795 if (likely(devno < ap->nr_pmp_links))
2796 return &ap->pmp_link[devno].device[0];
2802 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2803 const struct scsi_device *scsidev)
2807 /* skip commands not addressed to targets we simulate */
2808 if (!sata_pmp_attached(ap)) {
2809 if (unlikely(scsidev->channel || scsidev->lun))
2811 devno = scsidev->id;
2813 if (unlikely(scsidev->id || scsidev->lun))
2815 devno = scsidev->channel;
2818 return ata_find_dev(ap, devno);
2822 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2823 * @ap: ATA port to which the device is attached
2824 * @scsidev: SCSI device from which we derive the ATA device
2826 * Given various information provided in struct scsi_cmnd,
2827 * map that onto an ATA bus, and using that mapping
2828 * determine which ata_device is associated with the
2829 * SCSI command to be sent.
2832 * spin_lock_irqsave(host lock)
2835 * Associated ATA device, or %NULL if not found.
2837 static struct ata_device *
2838 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2840 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2842 if (unlikely(!dev || !ata_dev_enabled(dev)))
2849 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2850 * @byte1: Byte 1 from pass-thru CDB.
2853 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2856 ata_scsi_map_proto(u8 byte1)
2858 switch((byte1 & 0x1e) >> 1) {
2859 case 3: /* Non-data */
2860 return ATA_PROT_NODATA;
2863 case 10: /* UDMA Data-in */
2864 case 11: /* UDMA Data-Out */
2865 return ATA_PROT_DMA;
2867 case 4: /* PIO Data-in */
2868 case 5: /* PIO Data-out */
2869 return ATA_PROT_PIO;
2871 case 0: /* Hard Reset */
2873 case 8: /* Device Diagnostic */
2874 case 9: /* Device Reset */
2875 case 7: /* DMA Queued */
2876 case 12: /* FPDMA */
2877 case 15: /* Return Response Info */
2878 default: /* Reserved */
2882 return ATA_PROT_UNKNOWN;
2886 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2887 * @qc: command structure to be initialized
2889 * Handles either 12 or 16-byte versions of the CDB.
2892 * Zero on success, non-zero on failure.
2894 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2896 struct ata_taskfile *tf = &(qc->tf);
2897 struct scsi_cmnd *scmd = qc->scsicmd;
2898 struct ata_device *dev = qc->dev;
2899 const u8 *cdb = scmd->cmnd;
2901 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2905 * 12 and 16 byte CDBs use different offsets to
2906 * provide the various register values.
2908 if (cdb[0] == ATA_16) {
2910 * 16-byte CDB - may contain extended commands.
2912 * If that is the case, copy the upper byte register values.
2914 if (cdb[1] & 0x01) {
2915 tf->hob_feature = cdb[3];
2916 tf->hob_nsect = cdb[5];
2917 tf->hob_lbal = cdb[7];
2918 tf->hob_lbam = cdb[9];
2919 tf->hob_lbah = cdb[11];
2920 tf->flags |= ATA_TFLAG_LBA48;
2922 tf->flags &= ~ATA_TFLAG_LBA48;
2925 * Always copy low byte, device and command registers.
2927 tf->feature = cdb[4];
2932 tf->device = cdb[13];
2933 tf->command = cdb[14];
2936 * 12-byte CDB - incapable of extended commands.
2938 tf->flags &= ~ATA_TFLAG_LBA48;
2940 tf->feature = cdb[3];
2945 tf->device = cdb[8];
2946 tf->command = cdb[9];
2949 /* enforce correct master/slave bit */
2950 tf->device = dev->devno ?
2951 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2953 switch (tf->command) {
2954 /* READ/WRITE LONG use a non-standard sect_size */
2955 case ATA_CMD_READ_LONG:
2956 case ATA_CMD_READ_LONG_ONCE:
2957 case ATA_CMD_WRITE_LONG:
2958 case ATA_CMD_WRITE_LONG_ONCE:
2959 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2961 qc->sect_size = scsi_bufflen(scmd);
2964 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2965 case ATA_CMD_CFA_WRITE_NE:
2966 case ATA_CMD_CFA_TRANS_SECT:
2967 case ATA_CMD_CFA_WRITE_MULT_NE:
2968 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2970 case ATA_CMD_READ_EXT:
2971 case ATA_CMD_READ_QUEUED:
2972 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2973 case ATA_CMD_FPDMA_READ:
2974 case ATA_CMD_READ_MULTI:
2975 case ATA_CMD_READ_MULTI_EXT:
2976 case ATA_CMD_PIO_READ:
2977 case ATA_CMD_PIO_READ_EXT:
2978 case ATA_CMD_READ_STREAM_DMA_EXT:
2979 case ATA_CMD_READ_STREAM_EXT:
2980 case ATA_CMD_VERIFY:
2981 case ATA_CMD_VERIFY_EXT:
2983 case ATA_CMD_WRITE_EXT:
2984 case ATA_CMD_WRITE_FUA_EXT:
2985 case ATA_CMD_WRITE_QUEUED:
2986 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
2987 case ATA_CMD_FPDMA_WRITE:
2988 case ATA_CMD_WRITE_MULTI:
2989 case ATA_CMD_WRITE_MULTI_EXT:
2990 case ATA_CMD_WRITE_MULTI_FUA_EXT:
2991 case ATA_CMD_PIO_WRITE:
2992 case ATA_CMD_PIO_WRITE_EXT:
2993 case ATA_CMD_WRITE_STREAM_DMA_EXT:
2994 case ATA_CMD_WRITE_STREAM_EXT:
2995 qc->sect_size = scmd->device->sector_size;
2998 /* Everything else uses 512 byte "sectors" */
3000 qc->sect_size = ATA_SECT_SIZE;
3004 * Set flags so that all registers will be written, pass on
3005 * write indication (used for PIO/DMA setup), result TF is
3006 * copied back and we don't whine too much about its failure.
3008 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3009 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3010 tf->flags |= ATA_TFLAG_WRITE;
3012 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3015 * Set transfer length.
3017 * TODO: find out if we need to do more here to
3018 * cover scatter/gather case.
3020 ata_qc_set_pc_nbytes(qc);
3022 /* We may not issue DMA commands if no DMA mode is set */
3023 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
3026 /* sanity check for pio multi commands */
3027 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
3030 if (is_multi_taskfile(tf)) {
3031 unsigned int multi_count = 1 << (cdb[1] >> 5);
3033 /* compare the passed through multi_count
3034 * with the cached multi_count of libata
3036 if (multi_count != dev->multi_count)
3037 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3042 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3043 * SET_FEATURES - XFER MODE must be preceded/succeeded
3044 * by an update to hardware-specific registers for each
3045 * controller (i.e. the reason for ->set_piomode(),
3046 * ->set_dmamode(), and ->post_set_mode() hooks).
3048 if (tf->command == ATA_CMD_SET_FEATURES &&
3049 tf->feature == SETFEATURES_XFER)
3053 * Filter TPM commands by default. These provide an
3054 * essentially uncontrolled encrypted "back door" between
3055 * applications and the disk. Set libata.allow_tpm=1 if you
3056 * have a real reason for wanting to use them. This ensures
3057 * that installed software cannot easily mess stuff up without
3058 * user intent. DVR type users will probably ship with this enabled
3059 * for movie content management.
3061 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3062 * for this and should do in future but that it is not sufficient as
3063 * DCS is an optional feature set. Thus we also do the software filter
3064 * so that we comply with the TC consortium stated goal that the user
3065 * can turn off TC features of their system.
3067 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
3073 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3074 /* "Invalid field in cdb" */
3078 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3080 struct ata_taskfile *tf = &qc->tf;
3081 struct scsi_cmnd *scmd = qc->scsicmd;
3082 struct ata_device *dev = qc->dev;
3083 const u8 *cdb = scmd->cmnd;
3089 /* we may not issue DMA commands if no DMA mode is set */
3090 if (unlikely(!dev->dma_mode))
3093 if (unlikely(scmd->cmd_len < 16))
3095 scsi_16_lba_len(cdb, &block, &n_block);
3097 /* for now we only support WRITE SAME with the unmap bit set */
3098 if (unlikely(!(cdb[1] & 0x8)))
3102 * WRITE SAME always has a sector sized buffer as payload, this
3103 * should never be a multiple entry S/G list.
3105 if (!scsi_sg_count(scmd))
3108 buf = page_address(sg_page(scsi_sglist(scmd)));
3109 size = ata_set_lba_range_entries(buf, 512, block, n_block);
3111 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3112 /* Newer devices support queued TRIM commands */
3113 tf->protocol = ATA_PROT_NCQ;
3114 tf->command = ATA_CMD_FPDMA_SEND;
3115 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3116 tf->nsect = qc->tag << 3;
3117 tf->hob_feature = (size / 512) >> 8;
3118 tf->feature = size / 512;
3122 tf->protocol = ATA_PROT_DMA;
3123 tf->hob_feature = 0;
3124 tf->feature = ATA_DSM_TRIM;
3125 tf->hob_nsect = (size / 512) >> 8;
3126 tf->nsect = size / 512;
3127 tf->command = ATA_CMD_DSM;
3130 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3133 ata_qc_set_pc_nbytes(qc);
3138 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3139 /* "Invalid field in cdb" */
3144 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3145 * @qc: Storage for translated ATA taskfile
3146 * @buf: input buffer
3147 * @len: number of valid bytes in the input buffer
3149 * Prepare a taskfile to modify caching information for the device.
3154 static int ata_mselect_caching(struct ata_queued_cmd *qc,
3155 const u8 *buf, int len)
3157 struct ata_taskfile *tf = &qc->tf;
3158 struct ata_device *dev = qc->dev;
3159 char mpage[CACHE_MPAGE_LEN];
3163 * The first two bytes of def_cache_mpage are a header, so offsets
3164 * in mpage are off by 2 compared to buf. Same for len.
3167 if (len != CACHE_MPAGE_LEN - 2)
3170 wce = buf[0] & (1 << 2);
3173 * Check that read-only bits are not modified.
3175 ata_msense_caching(dev->id, mpage, false);
3176 mpage[2] &= ~(1 << 2);
3178 if (memcmp(mpage + 2, buf, CACHE_MPAGE_LEN - 2) != 0)
3181 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3182 tf->protocol = ATA_PROT_NODATA;
3184 tf->command = ATA_CMD_SET_FEATURES;
3185 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3190 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
3191 * @qc: Storage for translated ATA taskfile
3193 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3194 * Assume this is invoked for direct access devices (e.g. disks) only.
3195 * There should be no block descriptor for other device types.
3198 * spin_lock_irqsave(host lock)
3200 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3202 struct scsi_cmnd *scmd = qc->scsicmd;
3203 const u8 *cdb = scmd->cmnd;
3206 unsigned six_byte, pg_len, hdr_len, bd_len;
3211 six_byte = (cdb[0] == MODE_SELECT);
3213 if (scmd->cmd_len < 5)
3219 if (scmd->cmd_len < 9)
3222 len = (cdb[7] << 8) + cdb[8];
3226 /* We only support PF=1, SP=0. */
3227 if ((cdb[1] & 0x11) != 0x10)
3230 /* Test early for possible overrun. */
3231 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
3232 goto invalid_param_len;
3234 p = page_address(sg_page(scsi_sglist(scmd)));
3236 /* Move past header and block descriptors. */
3238 goto invalid_param_len;
3243 bd_len = (p[6] << 8) + p[7];
3248 goto invalid_param_len;
3249 if (bd_len != 0 && bd_len != 8)
3257 /* Parse both possible formats for the mode page headers. */
3261 goto invalid_param_len;
3264 pg_len = (p[2] << 8) | p[3];
3269 goto invalid_param_len;
3278 * No mode subpages supported (yet) but asking for _all_
3279 * subpages may be valid
3281 if (spg && (spg != ALL_SUB_MPAGES))
3284 goto invalid_param_len;
3288 if (ata_mselect_caching(qc, p, pg_len) < 0)
3292 default: /* invalid page code */
3297 * Only one page has changeable data, so we only support setting one
3306 /* "Invalid field in CDB" */
3307 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
3311 /* "Invalid field in parameter list" */
3312 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x26, 0x0);
3316 /* "Parameter list length error" */
3317 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3321 scmd->result = SAM_STAT_GOOD;
3326 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3328 * @cmd: SCSI command opcode to consider
3330 * Look up the SCSI command given, and determine whether the
3331 * SCSI command is to be translated or simulated.
3334 * Pointer to translation function if possible, %NULL if not.
3337 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3347 return ata_scsi_rw_xlat;
3350 return ata_scsi_write_same_xlat;
3352 case SYNCHRONIZE_CACHE:
3353 if (ata_try_flush_cache(dev))
3354 return ata_scsi_flush_xlat;
3359 return ata_scsi_verify_xlat;
3363 return ata_scsi_pass_thru;
3366 case MODE_SELECT_10:
3367 return ata_scsi_mode_select_xlat;
3371 return ata_scsi_start_stop_xlat;
3378 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3379 * @ap: ATA port to which the command was being sent
3380 * @cmd: SCSI command to dump
3382 * Prints the contents of a SCSI command via printk().
3385 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3386 struct scsi_cmnd *cmd)
3389 struct scsi_device *scsidev = cmd->device;
3390 u8 *scsicmd = cmd->cmnd;
3392 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
3394 scsidev->channel, scsidev->id, scsidev->lun,
3395 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3396 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3401 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
3402 struct ata_device *dev)
3404 u8 scsi_op = scmd->cmnd[0];
3405 ata_xlat_func_t xlat_func;
3408 if (dev->class == ATA_DEV_ATA) {
3409 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3412 xlat_func = ata_get_xlat_func(dev, scsi_op);
3414 if (unlikely(!scmd->cmd_len))
3418 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3419 /* relay SCSI command to ATAPI device */
3420 int len = COMMAND_SIZE(scsi_op);
3421 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
3424 xlat_func = atapi_xlat;
3426 /* ATA_16 passthru, treat as an ATA command */
3427 if (unlikely(scmd->cmd_len > 16))
3430 xlat_func = ata_get_xlat_func(dev, scsi_op);
3435 rc = ata_scsi_translate(dev, scmd, xlat_func);
3437 ata_scsi_simulate(dev, scmd);
3442 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3443 scmd->cmd_len, scsi_op, dev->cdb_len);
3444 scmd->result = DID_ERROR << 16;
3445 scmd->scsi_done(scmd);
3450 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3451 * @shost: SCSI host of command to be sent
3452 * @cmd: SCSI command to be sent
3454 * In some cases, this function translates SCSI commands into
3455 * ATA taskfiles, and queues the taskfiles to be sent to
3456 * hardware. In other cases, this function simulates a
3457 * SCSI device by evaluating and responding to certain
3458 * SCSI commands. This creates the overall effect of
3459 * ATA and ATAPI devices appearing as SCSI devices.
3465 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3468 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
3470 struct ata_port *ap;
3471 struct ata_device *dev;
3472 struct scsi_device *scsidev = cmd->device;
3474 unsigned long irq_flags;
3476 ap = ata_shost_to_port(shost);
3478 spin_lock_irqsave(ap->lock, irq_flags);
3480 ata_scsi_dump_cdb(ap, cmd);
3482 dev = ata_scsi_find_dev(ap, scsidev);
3484 rc = __ata_scsi_queuecmd(cmd, dev);
3486 cmd->result = (DID_BAD_TARGET << 16);
3487 cmd->scsi_done(cmd);
3490 spin_unlock_irqrestore(ap->lock, irq_flags);
3496 * ata_scsi_simulate - simulate SCSI command on ATA device
3497 * @dev: the target device
3498 * @cmd: SCSI command being sent to device.
3500 * Interprets and directly executes a select list of SCSI commands
3501 * that can be handled internally.
3504 * spin_lock_irqsave(host lock)
3507 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
3509 struct ata_scsi_args args;
3510 const u8 *scsicmd = cmd->cmnd;
3516 args.done = cmd->scsi_done;
3518 switch(scsicmd[0]) {
3519 /* TODO: worth improving? */
3521 ata_scsi_invalid_field(cmd);
3525 if (scsicmd[1] & 2) /* is CmdDt set? */
3526 ata_scsi_invalid_field(cmd);
3527 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3528 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3529 else switch (scsicmd[2]) {
3531 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
3534 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
3537 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
3540 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3543 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3546 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3549 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
3552 ata_scsi_invalid_field(cmd);
3559 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3563 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3566 case SERVICE_ACTION_IN_16:
3567 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3568 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3570 ata_scsi_invalid_field(cmd);
3574 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3578 ata_scsi_set_sense(cmd, 0, 0, 0);
3579 cmd->result = (DRIVER_SENSE << 24);
3580 cmd->scsi_done(cmd);
3583 /* if we reach this, then writeback caching is disabled,
3584 * turning this into a no-op.
3586 case SYNCHRONIZE_CACHE:
3589 /* no-op's, complete with success */
3593 case TEST_UNIT_READY:
3594 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3597 case SEND_DIAGNOSTIC:
3598 tmp8 = scsicmd[1] & ~(1 << 3);
3599 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3600 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3602 ata_scsi_invalid_field(cmd);
3605 /* all other commands */
3607 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3608 /* "Invalid command operation code" */
3609 cmd->scsi_done(cmd);
3614 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3618 for (i = 0; i < host->n_ports; i++) {
3619 struct ata_port *ap = host->ports[i];
3620 struct Scsi_Host *shost;
3623 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3627 shost->eh_noresume = 1;
3628 *(struct ata_port **)&shost->hostdata[0] = ap;
3629 ap->scsi_host = shost;
3631 shost->transportt = ata_scsi_transport_template;
3632 shost->unique_id = ap->print_id;
3635 shost->max_channel = 1;
3636 shost->max_cmd_len = 16;
3637 shost->no_write_same = 1;
3639 /* Schedule policy is determined by ->qc_defer()
3640 * callback and it needs to see every deferred qc.
3641 * Set host_blocked to 1 to prevent SCSI midlayer from
3642 * automatically deferring requests.
3644 shost->max_host_blocked = 1;
3646 rc = scsi_add_host_with_dma(ap->scsi_host,
3647 &ap->tdev, ap->host->dev);
3655 scsi_host_put(host->ports[i]->scsi_host);
3658 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3660 scsi_remove_host(shost);
3661 scsi_host_put(shost);
3666 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3669 struct ata_device *last_failed_dev = NULL;
3670 struct ata_link *link;
3671 struct ata_device *dev;
3674 ata_for_each_link(link, ap, EDGE) {
3675 ata_for_each_dev(dev, link, ENABLED) {
3676 struct scsi_device *sdev;
3677 int channel = 0, id = 0;
3682 if (ata_is_host_link(link))
3685 channel = link->pmp;
3687 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3689 if (!IS_ERR(sdev)) {
3691 scsi_device_put(sdev);
3698 /* If we scanned while EH was in progress or allocation
3699 * failure occurred, scan would have failed silently. Check
3700 * whether all devices are attached.
3702 ata_for_each_link(link, ap, EDGE) {
3703 ata_for_each_dev(dev, link, ENABLED) {
3712 /* we're missing some SCSI devices */
3714 /* If caller requested synchrnous scan && we've made
3715 * any progress, sleep briefly and repeat.
3717 if (dev != last_failed_dev) {
3719 last_failed_dev = dev;
3723 /* We might be failing to detect boot device, give it
3724 * a few more chances.
3732 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
3735 queue_delayed_work(system_long_wq, &ap->hotplug_task,
3736 round_jiffies_relative(HZ));
3740 * ata_scsi_offline_dev - offline attached SCSI device
3741 * @dev: ATA device to offline attached SCSI device for
3743 * This function is called from ata_eh_hotplug() and responsible
3744 * for taking the SCSI device attached to @dev offline. This
3745 * function is called with host lock which protects dev->sdev
3749 * spin_lock_irqsave(host lock)
3752 * 1 if attached SCSI device exists, 0 otherwise.
3754 int ata_scsi_offline_dev(struct ata_device *dev)
3757 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3764 * ata_scsi_remove_dev - remove attached SCSI device
3765 * @dev: ATA device to remove attached SCSI device for
3767 * This function is called from ata_eh_scsi_hotplug() and
3768 * responsible for removing the SCSI device attached to @dev.
3771 * Kernel thread context (may sleep).
3773 static void ata_scsi_remove_dev(struct ata_device *dev)
3775 struct ata_port *ap = dev->link->ap;
3776 struct scsi_device *sdev;
3777 unsigned long flags;
3779 /* Alas, we need to grab scan_mutex to ensure SCSI device
3780 * state doesn't change underneath us and thus
3781 * scsi_device_get() always succeeds. The mutex locking can
3782 * be removed if there is __scsi_device_get() interface which
3783 * increments reference counts regardless of device state.
3785 mutex_lock(&ap->scsi_host->scan_mutex);
3786 spin_lock_irqsave(ap->lock, flags);
3788 /* clearing dev->sdev is protected by host lock */
3793 /* If user initiated unplug races with us, sdev can go
3794 * away underneath us after the host lock and
3795 * scan_mutex are released. Hold onto it.
3797 if (scsi_device_get(sdev) == 0) {
3798 /* The following ensures the attached sdev is
3799 * offline on return from ata_scsi_offline_dev()
3800 * regardless it wins or loses the race
3801 * against this function.
3803 scsi_device_set_state(sdev, SDEV_OFFLINE);
3810 spin_unlock_irqrestore(ap->lock, flags);
3811 mutex_unlock(&ap->scsi_host->scan_mutex);
3814 ata_dev_info(dev, "detaching (SCSI %s)\n",
3815 dev_name(&sdev->sdev_gendev));
3817 scsi_remove_device(sdev);
3818 scsi_device_put(sdev);
3822 static void ata_scsi_handle_link_detach(struct ata_link *link)
3824 struct ata_port *ap = link->ap;
3825 struct ata_device *dev;
3827 ata_for_each_dev(dev, link, ALL) {
3828 unsigned long flags;
3830 if (!(dev->flags & ATA_DFLAG_DETACHED))
3833 spin_lock_irqsave(ap->lock, flags);
3834 dev->flags &= ~ATA_DFLAG_DETACHED;
3835 spin_unlock_irqrestore(ap->lock, flags);
3837 if (zpodd_dev_enabled(dev))
3840 ata_scsi_remove_dev(dev);
3845 * ata_scsi_media_change_notify - send media change event
3846 * @dev: Pointer to the disk device with media change event
3848 * Tell the block layer to send a media change notification
3852 * spin_lock_irqsave(host lock)
3854 void ata_scsi_media_change_notify(struct ata_device *dev)
3857 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3862 * ata_scsi_hotplug - SCSI part of hotplug
3863 * @work: Pointer to ATA port to perform SCSI hotplug on
3865 * Perform SCSI part of hotplug. It's executed from a separate
3866 * workqueue after EH completes. This is necessary because SCSI
3867 * hot plugging requires working EH and hot unplugging is
3868 * synchronized with hot plugging with a mutex.
3871 * Kernel thread context (may sleep).
3873 void ata_scsi_hotplug(struct work_struct *work)
3875 struct ata_port *ap =
3876 container_of(work, struct ata_port, hotplug_task.work);
3879 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3880 DPRINTK("ENTER/EXIT - unloading\n");
3887 * The block layer suspend/resume path is fundamentally broken due
3888 * to freezable kthreads and workqueue and may deadlock if a block
3889 * device gets removed while resume is in progress. I don't know
3890 * what the solution is short of removing freezable kthreads and
3891 * workqueues altogether.
3893 * The following is an ugly hack to avoid kicking off device
3894 * removal while freezer is active. This is a joke but does avoid
3895 * this particular deadlock scenario.
3897 * https://bugzilla.kernel.org/show_bug.cgi?id=62801
3898 * http://marc.info/?l=linux-kernel&m=138695698516487
3900 #ifdef CONFIG_FREEZER
3906 mutex_lock(&ap->scsi_scan_mutex);
3908 /* Unplug detached devices. We cannot use link iterator here
3909 * because PMP links have to be scanned even if PMP is
3910 * currently not attached. Iterate manually.
3912 ata_scsi_handle_link_detach(&ap->link);
3914 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3915 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3917 /* scan for new ones */
3918 ata_scsi_scan_host(ap, 0);
3920 mutex_unlock(&ap->scsi_scan_mutex);
3925 * ata_scsi_user_scan - indication for user-initiated bus scan
3926 * @shost: SCSI host to scan
3927 * @channel: Channel to scan
3931 * This function is called when user explicitly requests bus
3932 * scan. Set probe pending flag and invoke EH.
3935 * SCSI layer (we don't care)
3940 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3941 unsigned int id, u64 lun)
3943 struct ata_port *ap = ata_shost_to_port(shost);
3944 unsigned long flags;
3947 if (!ap->ops->error_handler)
3950 if (lun != SCAN_WILD_CARD && lun)
3953 if (!sata_pmp_attached(ap)) {
3954 if (channel != SCAN_WILD_CARD && channel)
3958 if (id != SCAN_WILD_CARD && id)
3963 spin_lock_irqsave(ap->lock, flags);
3965 if (devno == SCAN_WILD_CARD) {
3966 struct ata_link *link;
3968 ata_for_each_link(link, ap, EDGE) {
3969 struct ata_eh_info *ehi = &link->eh_info;
3970 ehi->probe_mask |= ATA_ALL_DEVICES;
3971 ehi->action |= ATA_EH_RESET;
3974 struct ata_device *dev = ata_find_dev(ap, devno);
3977 struct ata_eh_info *ehi = &dev->link->eh_info;
3978 ehi->probe_mask |= 1 << dev->devno;
3979 ehi->action |= ATA_EH_RESET;
3985 ata_port_schedule_eh(ap);
3986 spin_unlock_irqrestore(ap->lock, flags);
3987 ata_port_wait_eh(ap);
3989 spin_unlock_irqrestore(ap->lock, flags);
3995 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3996 * @work: Pointer to ATA port to perform scsi_rescan_device()
3998 * After ATA pass thru (SAT) commands are executed successfully,
3999 * libata need to propagate the changes to SCSI layer.
4002 * Kernel thread context (may sleep).
4004 void ata_scsi_dev_rescan(struct work_struct *work)
4006 struct ata_port *ap =
4007 container_of(work, struct ata_port, scsi_rescan_task);
4008 struct ata_link *link;
4009 struct ata_device *dev;
4010 unsigned long flags;
4012 mutex_lock(&ap->scsi_scan_mutex);
4013 spin_lock_irqsave(ap->lock, flags);
4015 ata_for_each_link(link, ap, EDGE) {
4016 ata_for_each_dev(dev, link, ENABLED) {
4017 struct scsi_device *sdev = dev->sdev;
4021 if (scsi_device_get(sdev))
4024 spin_unlock_irqrestore(ap->lock, flags);
4025 scsi_rescan_device(&(sdev->sdev_gendev));
4026 scsi_device_put(sdev);
4027 spin_lock_irqsave(ap->lock, flags);
4031 spin_unlock_irqrestore(ap->lock, flags);
4032 mutex_unlock(&ap->scsi_scan_mutex);
4036 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4037 * @host: ATA host container for all SAS ports
4038 * @port_info: Information from low-level host driver
4039 * @shost: SCSI host that the scsi device is attached to
4042 * PCI/etc. bus probe sem.
4045 * ata_port pointer on success / NULL on failure.
4048 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
4049 struct ata_port_info *port_info,
4050 struct Scsi_Host *shost)
4052 struct ata_port *ap;
4054 ap = ata_port_alloc(host);
4059 ap->lock = &host->lock;
4060 ap->pio_mask = port_info->pio_mask;
4061 ap->mwdma_mask = port_info->mwdma_mask;
4062 ap->udma_mask = port_info->udma_mask;
4063 ap->flags |= port_info->flags;
4064 ap->ops = port_info->port_ops;
4065 ap->cbl = ATA_CBL_SATA;
4069 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
4072 * ata_sas_port_start - Set port up for dma.
4073 * @ap: Port to initialize
4075 * Called just after data structures for each port are
4078 * May be used as the port_start() entry in ata_port_operations.
4081 * Inherited from caller.
4083 int ata_sas_port_start(struct ata_port *ap)
4086 * the port is marked as frozen at allocation time, but if we don't
4087 * have new eh, we won't thaw it
4089 if (!ap->ops->error_handler)
4090 ap->pflags &= ~ATA_PFLAG_FROZEN;
4093 EXPORT_SYMBOL_GPL(ata_sas_port_start);
4096 * ata_port_stop - Undo ata_sas_port_start()
4097 * @ap: Port to shut down
4099 * May be used as the port_stop() entry in ata_port_operations.
4102 * Inherited from caller.
4105 void ata_sas_port_stop(struct ata_port *ap)
4108 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
4111 * ata_sas_async_probe - simply schedule probing and return
4112 * @ap: Port to probe
4114 * For batch scheduling of probe for sas attached ata devices, assumes
4115 * the port has already been through ata_sas_port_init()
4117 void ata_sas_async_probe(struct ata_port *ap)
4119 __ata_port_probe(ap);
4121 EXPORT_SYMBOL_GPL(ata_sas_async_probe);
4123 int ata_sas_sync_probe(struct ata_port *ap)
4125 return ata_port_probe(ap);
4127 EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
4131 * ata_sas_port_init - Initialize a SATA device
4132 * @ap: SATA port to initialize
4135 * PCI/etc. bus probe sem.
4138 * Zero on success, non-zero on error.
4141 int ata_sas_port_init(struct ata_port *ap)
4143 int rc = ap->ops->port_start(ap);
4147 ap->print_id = atomic_inc_return(&ata_print_id);
4150 EXPORT_SYMBOL_GPL(ata_sas_port_init);
4153 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
4154 * @ap: SATA port to destroy
4158 void ata_sas_port_destroy(struct ata_port *ap)
4160 if (ap->ops->port_stop)
4161 ap->ops->port_stop(ap);
4164 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
4167 * ata_sas_slave_configure - Default slave_config routine for libata devices
4168 * @sdev: SCSI device to configure
4169 * @ap: ATA port to which SCSI device is attached
4175 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
4177 ata_scsi_sdev_config(sdev);
4178 ata_scsi_dev_config(sdev, ap->link.device);
4181 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
4184 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
4185 * @cmd: SCSI command to be sent
4186 * @ap: ATA port to which the command is being sent
4189 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4193 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
4197 ata_scsi_dump_cdb(ap, cmd);
4199 if (likely(ata_dev_enabled(ap->link.device)))
4200 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
4202 cmd->result = (DID_BAD_TARGET << 16);
4203 cmd->scsi_done(cmd);
4207 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);