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 &&
239 dev->class != ATA_DEV_ZAC) {
245 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
250 dev->unpark_deadline = ata_deadline(jiffies, input);
251 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
252 ata_port_schedule_eh(ap);
253 complete(&ap->park_req_pending);
257 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
260 dev->flags |= ATA_DFLAG_NO_UNLOAD;
265 spin_unlock_irqrestore(ap->lock, flags);
267 return rc ? rc : len;
269 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
270 ata_scsi_park_show, ata_scsi_park_store);
271 EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
273 static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
275 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
277 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
281 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
282 const char *buf, size_t count)
284 struct Scsi_Host *shost = class_to_shost(dev);
285 struct ata_port *ap = ata_shost_to_port(shost);
286 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
287 return ap->ops->em_store(ap, buf, count);
292 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
295 struct Scsi_Host *shost = class_to_shost(dev);
296 struct ata_port *ap = ata_shost_to_port(shost);
298 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
299 return ap->ops->em_show(ap, buf);
302 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
303 ata_scsi_em_message_show, ata_scsi_em_message_store);
304 EXPORT_SYMBOL_GPL(dev_attr_em_message);
307 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
310 struct Scsi_Host *shost = class_to_shost(dev);
311 struct ata_port *ap = ata_shost_to_port(shost);
313 return snprintf(buf, 23, "%d\n", ap->em_message_type);
315 DEVICE_ATTR(em_message_type, S_IRUGO,
316 ata_scsi_em_message_type_show, NULL);
317 EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
320 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
323 struct scsi_device *sdev = to_scsi_device(dev);
324 struct ata_port *ap = ata_shost_to_port(sdev->host);
325 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
327 if (atadev && ap->ops->sw_activity_show &&
328 (ap->flags & ATA_FLAG_SW_ACTIVITY))
329 return ap->ops->sw_activity_show(atadev, buf);
334 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
335 const char *buf, size_t count)
337 struct scsi_device *sdev = to_scsi_device(dev);
338 struct ata_port *ap = ata_shost_to_port(sdev->host);
339 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
340 enum sw_activity val;
343 if (atadev && ap->ops->sw_activity_store &&
344 (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
345 val = simple_strtoul(buf, NULL, 0);
347 case OFF: case BLINK_ON: case BLINK_OFF:
348 rc = ap->ops->sw_activity_store(atadev, val);
357 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
358 ata_scsi_activity_store);
359 EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
361 struct device_attribute *ata_common_sdev_attrs[] = {
362 &dev_attr_unload_heads,
365 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
367 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd)
369 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
370 /* "Invalid field in cbd" */
375 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
376 * @sdev: SCSI device for which BIOS geometry is to be determined
377 * @bdev: block device associated with @sdev
378 * @capacity: capacity of SCSI device
379 * @geom: location to which geometry will be output
381 * Generic bios head/sector/cylinder calculator
382 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
383 * mapping. Some situations may arise where the disk is not
384 * bootable if this is not used.
387 * Defined by the SCSI layer. We don't really care.
392 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
393 sector_t capacity, int geom[])
397 sector_div(capacity, 255*63);
404 * ata_scsi_unlock_native_capacity - unlock native capacity
405 * @sdev: SCSI device to adjust device capacity for
407 * This function is called if a partition on @sdev extends beyond
408 * the end of the device. It requests EH to unlock HPA.
411 * Defined by the SCSI layer. Might sleep.
413 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
415 struct ata_port *ap = ata_shost_to_port(sdev->host);
416 struct ata_device *dev;
419 spin_lock_irqsave(ap->lock, flags);
421 dev = ata_scsi_find_dev(ap, sdev);
422 if (dev && dev->n_sectors < dev->n_native_sectors) {
423 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
424 dev->link->eh_info.action |= ATA_EH_RESET;
425 ata_port_schedule_eh(ap);
428 spin_unlock_irqrestore(ap->lock, flags);
429 ata_port_wait_eh(ap);
433 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
435 * @sdev: SCSI device to get identify data for
436 * @arg: User buffer area for identify data
439 * Defined by the SCSI layer. We don't really care.
442 * Zero on success, negative errno on error.
444 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
447 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
448 u16 __user *dst = arg;
454 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
457 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
458 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
461 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
462 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
465 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
466 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
473 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
474 * @scsidev: Device to which we are issuing command
475 * @arg: User provided data for issuing command
478 * Defined by the SCSI layer. We don't really care.
481 * Zero on success, negative errno on error.
483 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
486 u8 scsi_cmd[MAX_COMMAND_SIZE];
487 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
489 enum dma_data_direction data_dir;
495 if (copy_from_user(args, arg, sizeof(args)))
498 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
502 memset(scsi_cmd, 0, sizeof(scsi_cmd));
505 argsize = ATA_SECT_SIZE * args[3];
506 argbuf = kmalloc(argsize, GFP_KERNEL);
507 if (argbuf == NULL) {
512 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
513 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
514 block count in sector count field */
515 data_dir = DMA_FROM_DEVICE;
517 scsi_cmd[1] = (3 << 1); /* Non-data */
518 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
522 scsi_cmd[0] = ATA_16;
524 scsi_cmd[4] = args[2];
525 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
526 scsi_cmd[6] = args[3];
527 scsi_cmd[8] = args[1];
531 scsi_cmd[6] = args[1];
533 scsi_cmd[14] = args[0];
535 /* Good values for timeout and retries? Values below
536 from scsi_ioctl_send_command() for default case... */
537 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
538 sensebuf, (10*HZ), 5, 0, NULL);
540 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
541 u8 *desc = sensebuf + 8;
542 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
544 /* If we set cc then ATA pass-through will cause a
545 * check condition even if no error. Filter that. */
546 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
547 struct scsi_sense_hdr sshdr;
548 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
550 if (sshdr.sense_key == RECOVERED_ERROR &&
551 sshdr.asc == 0 && sshdr.ascq == 0x1d)
552 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
555 /* Send userspace a few ATA registers (same as drivers/ide) */
556 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
557 desc[0] == 0x09) { /* code is "ATA Descriptor" */
558 args[0] = desc[13]; /* status */
559 args[1] = desc[3]; /* error */
560 args[2] = desc[5]; /* sector count (0:7) */
561 if (copy_to_user(arg, args, sizeof(args)))
573 && copy_to_user(arg + sizeof(args), argbuf, argsize))
582 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
583 * @scsidev: Device to which we are issuing command
584 * @arg: User provided data for issuing command
587 * Defined by the SCSI layer. We don't really care.
590 * Zero on success, negative errno on error.
592 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
595 u8 scsi_cmd[MAX_COMMAND_SIZE];
596 u8 args[7], *sensebuf = NULL;
602 if (copy_from_user(args, arg, sizeof(args)))
605 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
609 memset(scsi_cmd, 0, sizeof(scsi_cmd));
610 scsi_cmd[0] = ATA_16;
611 scsi_cmd[1] = (3 << 1); /* Non-data */
612 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
613 scsi_cmd[4] = args[1];
614 scsi_cmd[6] = args[2];
615 scsi_cmd[8] = args[3];
616 scsi_cmd[10] = args[4];
617 scsi_cmd[12] = args[5];
618 scsi_cmd[13] = args[6] & 0x4f;
619 scsi_cmd[14] = args[0];
621 /* Good values for timeout and retries? Values below
622 from scsi_ioctl_send_command() for default case... */
623 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
624 sensebuf, (10*HZ), 5, 0, NULL);
626 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
627 u8 *desc = sensebuf + 8;
628 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
630 /* If we set cc then ATA pass-through will cause a
631 * check condition even if no error. Filter that. */
632 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
633 struct scsi_sense_hdr sshdr;
634 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
636 if (sshdr.sense_key == RECOVERED_ERROR &&
637 sshdr.asc == 0 && sshdr.ascq == 0x1d)
638 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
641 /* Send userspace ATA registers */
642 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
643 desc[0] == 0x09) {/* code is "ATA Descriptor" */
644 args[0] = desc[13]; /* status */
645 args[1] = desc[3]; /* error */
646 args[2] = desc[5]; /* sector count (0:7) */
647 args[3] = desc[7]; /* lbal */
648 args[4] = desc[9]; /* lbam */
649 args[5] = desc[11]; /* lbah */
650 args[6] = desc[12]; /* select */
651 if (copy_to_user(arg, args, sizeof(args)))
666 static int ata_ioc32(struct ata_port *ap)
668 if (ap->flags & ATA_FLAG_PIO_DMA)
670 if (ap->pflags & ATA_PFLAG_PIO32)
675 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
676 int cmd, void __user *arg)
678 int val = -EINVAL, rc = -EINVAL;
682 case ATA_IOC_GET_IO32:
683 spin_lock_irqsave(ap->lock, flags);
685 spin_unlock_irqrestore(ap->lock, flags);
686 if (copy_to_user(arg, &val, 1))
690 case ATA_IOC_SET_IO32:
691 val = (unsigned long) arg;
693 spin_lock_irqsave(ap->lock, flags);
694 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
696 ap->pflags |= ATA_PFLAG_PIO32;
698 ap->pflags &= ~ATA_PFLAG_PIO32;
700 if (val != ata_ioc32(ap))
703 spin_unlock_irqrestore(ap->lock, flags);
706 case HDIO_GET_IDENTITY:
707 return ata_get_identity(ap, scsidev, arg);
710 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
712 return ata_cmd_ioctl(scsidev, arg);
714 case HDIO_DRIVE_TASK:
715 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
717 return ata_task_ioctl(scsidev, arg);
726 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
728 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
730 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
733 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
736 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
737 * @dev: ATA device to which the new command is attached
738 * @cmd: SCSI command that originated this ATA command
740 * Obtain a reference to an unused ata_queued_cmd structure,
741 * which is the basic libata structure representing a single
742 * ATA command sent to the hardware.
744 * If a command was available, fill in the SCSI-specific
745 * portions of the structure with information on the
749 * spin_lock_irqsave(host lock)
752 * Command allocated, or %NULL if none available.
754 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
755 struct scsi_cmnd *cmd)
757 struct ata_queued_cmd *qc;
759 qc = ata_qc_new_init(dev);
762 qc->scsidone = cmd->scsi_done;
764 qc->sg = scsi_sglist(cmd);
765 qc->n_elem = scsi_sg_count(cmd);
767 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
774 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
776 struct scsi_cmnd *scmd = qc->scsicmd;
778 qc->extrabytes = scmd->request->extra_len;
779 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
783 * ata_dump_status - user friendly display of error info
784 * @id: id of the port in question
785 * @tf: ptr to filled out taskfile
787 * Decode and dump the ATA error/status registers for the user so
788 * that they have some idea what really happened at the non
789 * make-believe layer.
792 * inherited from caller
794 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
796 u8 stat = tf->command, err = tf->feature;
798 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
799 if (stat & ATA_BUSY) {
800 printk("Busy }\n"); /* Data is not valid in this case */
802 if (stat & 0x40) printk("DriveReady ");
803 if (stat & 0x20) printk("DeviceFault ");
804 if (stat & 0x10) printk("SeekComplete ");
805 if (stat & 0x08) printk("DataRequest ");
806 if (stat & 0x04) printk("CorrectedError ");
807 if (stat & 0x02) printk("Index ");
808 if (stat & 0x01) printk("Error ");
812 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
813 if (err & 0x04) printk("DriveStatusError ");
815 if (err & 0x04) printk("BadCRC ");
816 else printk("Sector ");
818 if (err & 0x40) printk("UncorrectableError ");
819 if (err & 0x10) printk("SectorIdNotFound ");
820 if (err & 0x02) printk("TrackZeroNotFound ");
821 if (err & 0x01) printk("AddrMarkNotFound ");
828 * ata_to_sense_error - convert ATA error to SCSI error
829 * @id: ATA device number
830 * @drv_stat: value contained in ATA status register
831 * @drv_err: value contained in ATA error register
832 * @sk: the sense key we'll fill out
833 * @asc: the additional sense code we'll fill out
834 * @ascq: the additional sense code qualifier we'll fill out
835 * @verbose: be verbose
837 * Converts an ATA error into a SCSI error. Fill out pointers to
838 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
839 * format sense blocks.
842 * spin_lock_irqsave(host lock)
844 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
845 u8 *asc, u8 *ascq, int verbose)
849 /* Based on the 3ware driver translation table */
850 static const unsigned char sense_table[][4] = {
852 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
854 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
856 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
857 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
858 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
859 /* MC|ID|ABRT|TRK0|MARK */
860 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
862 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
863 /* Bad address mark */
864 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
866 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
867 /* Abort: 0x04 is not translated here, see below */
868 /* Media change request */
869 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
871 {0x10, ILLEGAL_REQUEST, 0x21, 0x00}, // ID not found Logical address out of range
873 {0x20, UNIT_ATTENTION, 0x28, 0x00}, // Media Changed Not ready to ready change, medium may have changed
875 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
876 /* BBD - block marked bad */
877 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
878 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
880 static const unsigned char stat_table[][4] = {
881 /* Must be first because BUSY means no other bits valid */
882 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
883 {0x20, HARDWARE_ERROR, 0x44, 0x00}, // Device fault, internal target failure
884 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
885 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
886 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
890 * Is this an error we can process/parse
892 if (drv_stat & ATA_BUSY) {
893 drv_err = 0; /* Ignore the err bits, they're invalid */
897 /* Look for drv_err */
898 for (i = 0; sense_table[i][0] != 0xFF; i++) {
899 /* Look for best matches first */
900 if ((sense_table[i][0] & drv_err) ==
902 *sk = sense_table[i][1];
903 *asc = sense_table[i][2];
904 *ascq = sense_table[i][3];
911 * Fall back to interpreting status bits. Note that if the drv_err
912 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
913 * is not descriptive enough.
915 for (i = 0; stat_table[i][0] != 0xFF; i++) {
916 if (stat_table[i][0] & drv_stat) {
917 *sk = stat_table[i][1];
918 *asc = stat_table[i][2];
919 *ascq = stat_table[i][3];
925 * We need a sensible error return here, which is tricky, and one
926 * that won't cause people to do things like return a disk wrongly.
928 *sk = ABORTED_COMMAND;
934 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
935 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
936 id, drv_stat, drv_err, *sk, *asc, *ascq);
941 * ata_gen_passthru_sense - Generate check condition sense block.
942 * @qc: Command that completed.
944 * This function is specific to the ATA descriptor format sense
945 * block specified for the ATA pass through commands. Regardless
946 * of whether the command errored or not, return a sense
947 * block. Copy all controller registers into the sense
948 * block. If there was no error, we get the request from an ATA
949 * passthrough command, so we use the following sense data:
950 * sk = RECOVERED ERROR
951 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
957 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
959 struct scsi_cmnd *cmd = qc->scsicmd;
960 struct ata_taskfile *tf = &qc->result_tf;
961 unsigned char *sb = cmd->sense_buffer;
962 unsigned char *desc = sb + 8;
963 int verbose = qc->ap->ops->error_handler == NULL;
965 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
967 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
970 * Use ata_to_sense_error() to map status register bits
971 * onto sense key, asc & ascq.
974 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
975 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
976 &sb[1], &sb[2], &sb[3], verbose);
979 sb[1] = RECOVERED_ERROR;
985 * Sense data is current and format is descriptor.
991 /* set length of additional sense data */
996 * Copy registers into sense buffer.
999 desc[3] = tf->feature; /* == error reg */
1000 desc[5] = tf->nsect;
1003 desc[11] = tf->lbah;
1004 desc[12] = tf->device;
1005 desc[13] = tf->command; /* == status reg */
1008 * Fill in Extend bit, and the high order bytes
1011 if (tf->flags & ATA_TFLAG_LBA48) {
1013 desc[4] = tf->hob_nsect;
1014 desc[6] = tf->hob_lbal;
1015 desc[8] = tf->hob_lbam;
1016 desc[10] = tf->hob_lbah;
1021 * ata_gen_ata_sense - generate a SCSI fixed sense block
1022 * @qc: Command that we are erroring out
1024 * Generate sense block for a failed ATA command @qc. Descriptor
1025 * format is used to accommodate LBA48 block address.
1030 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1032 struct ata_device *dev = qc->dev;
1033 struct scsi_cmnd *cmd = qc->scsicmd;
1034 struct ata_taskfile *tf = &qc->result_tf;
1035 unsigned char *sb = cmd->sense_buffer;
1036 unsigned char *desc = sb + 8;
1037 int verbose = qc->ap->ops->error_handler == NULL;
1040 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1042 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1044 /* sense data is current and format is descriptor */
1047 /* Use ata_to_sense_error() to map status register bits
1048 * onto sense key, asc & ascq.
1051 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1052 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1053 &sb[1], &sb[2], &sb[3], verbose);
1057 block = ata_tf_read_block(&qc->result_tf, dev);
1059 /* information sense data descriptor */
1064 desc[2] |= 0x80; /* valid */
1065 desc[6] = block >> 40;
1066 desc[7] = block >> 32;
1067 desc[8] = block >> 24;
1068 desc[9] = block >> 16;
1069 desc[10] = block >> 8;
1073 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1075 sdev->use_10_for_rw = 1;
1076 sdev->use_10_for_ms = 1;
1077 sdev->no_report_opcodes = 1;
1078 sdev->no_write_same = 1;
1080 /* Schedule policy is determined by ->qc_defer() callback and
1081 * it needs to see every deferred qc. Set dev_blocked to 1 to
1082 * prevent SCSI midlayer from automatically deferring
1085 sdev->max_device_blocked = 1;
1089 * atapi_drain_needed - Check whether data transfer may overflow
1090 * @rq: request to be checked
1092 * ATAPI commands which transfer variable length data to host
1093 * might overflow due to application error or hardare bug. This
1094 * function checks whether overflow should be drained and ignored
1101 * 1 if ; otherwise, 0.
1103 static int atapi_drain_needed(struct request *rq)
1105 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
1108 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
1111 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1114 static int ata_scsi_dev_config(struct scsi_device *sdev,
1115 struct ata_device *dev)
1117 struct request_queue *q = sdev->request_queue;
1119 if (!ata_id_has_unload(dev->id))
1120 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1122 /* configure max sectors */
1123 blk_queue_max_hw_sectors(q, dev->max_sectors);
1125 if (dev->class == ATA_DEV_ATAPI) {
1128 sdev->sector_size = ATA_SECT_SIZE;
1130 /* set DMA padding */
1131 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1133 /* configure draining */
1134 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1136 ata_dev_err(dev, "drain buffer allocation failed\n");
1140 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1142 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1143 sdev->manage_start_stop = 1;
1147 * ata_pio_sectors() expects buffer for each sector to not cross
1148 * page boundary. Enforce it by requiring buffers to be sector
1149 * aligned, which works iff sector_size is not larger than
1150 * PAGE_SIZE. ATAPI devices also need the alignment as
1151 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1153 if (sdev->sector_size > PAGE_SIZE)
1155 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1158 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1160 if (dev->flags & ATA_DFLAG_AN)
1161 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1163 if (dev->flags & ATA_DFLAG_NCQ) {
1166 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1167 depth = min(ATA_MAX_QUEUE - 1, depth);
1168 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
1171 blk_queue_flush_queueable(q, false);
1178 * ata_scsi_slave_config - Set SCSI device attributes
1179 * @sdev: SCSI device to examine
1181 * This is called before we actually start reading
1182 * and writing to the device, to configure certain
1183 * SCSI mid-layer behaviors.
1186 * Defined by SCSI layer. We don't really care.
1189 int ata_scsi_slave_config(struct scsi_device *sdev)
1191 struct ata_port *ap = ata_shost_to_port(sdev->host);
1192 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1195 ata_scsi_sdev_config(sdev);
1198 rc = ata_scsi_dev_config(sdev, dev);
1204 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1205 * @sdev: SCSI device to be destroyed
1207 * @sdev is about to be destroyed for hot/warm unplugging. If
1208 * this unplugging was initiated by libata as indicated by NULL
1209 * dev->sdev, this function doesn't have to do anything.
1210 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1211 * Clear dev->sdev, schedule the device for ATA detach and invoke
1215 * Defined by SCSI layer. We don't really care.
1217 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1219 struct ata_port *ap = ata_shost_to_port(sdev->host);
1220 struct request_queue *q = sdev->request_queue;
1221 unsigned long flags;
1222 struct ata_device *dev;
1224 if (!ap->ops->error_handler)
1227 spin_lock_irqsave(ap->lock, flags);
1228 dev = __ata_scsi_find_dev(ap, sdev);
1229 if (dev && dev->sdev) {
1230 /* SCSI device already in CANCEL state, no need to offline it */
1232 dev->flags |= ATA_DFLAG_DETACH;
1233 ata_port_schedule_eh(ap);
1235 spin_unlock_irqrestore(ap->lock, flags);
1237 kfree(q->dma_drain_buffer);
1238 q->dma_drain_buffer = NULL;
1239 q->dma_drain_size = 0;
1243 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1244 * @ap: ATA port to which the device change the queue depth
1245 * @sdev: SCSI device to configure queue depth for
1246 * @queue_depth: new queue depth
1247 * @reason: calling context
1249 * libsas and libata have different approaches for associating a sdev to
1253 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1254 int queue_depth, int reason)
1256 struct ata_device *dev;
1257 unsigned long flags;
1259 if (reason != SCSI_QDEPTH_DEFAULT)
1262 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1263 return sdev->queue_depth;
1265 dev = ata_scsi_find_dev(ap, sdev);
1266 if (!dev || !ata_dev_enabled(dev))
1267 return sdev->queue_depth;
1270 spin_lock_irqsave(ap->lock, flags);
1271 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1272 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1273 dev->flags |= ATA_DFLAG_NCQ_OFF;
1276 spin_unlock_irqrestore(ap->lock, flags);
1278 /* limit and apply queue depth */
1279 queue_depth = min(queue_depth, sdev->host->can_queue);
1280 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1281 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1283 if (sdev->queue_depth == queue_depth)
1286 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
1291 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1292 * @sdev: SCSI device to configure queue depth for
1293 * @queue_depth: new queue depth
1294 * @reason: calling context
1296 * This is libata standard hostt->change_queue_depth callback.
1297 * SCSI will call into this callback when user tries to set queue
1301 * SCSI layer (we don't care)
1304 * Newly configured queue depth.
1306 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth,
1309 struct ata_port *ap = ata_shost_to_port(sdev->host);
1311 return __ata_change_queue_depth(ap, sdev, queue_depth, reason);
1315 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1316 * @qc: Storage for translated ATA taskfile
1318 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1319 * (to start). Perhaps these commands should be preceded by
1320 * CHECK POWER MODE to see what power mode the device is already in.
1321 * [See SAT revision 5 at www.t10.org]
1324 * spin_lock_irqsave(host lock)
1327 * Zero on success, non-zero on error.
1329 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1331 struct scsi_cmnd *scmd = qc->scsicmd;
1332 struct ata_taskfile *tf = &qc->tf;
1333 const u8 *cdb = scmd->cmnd;
1335 if (scmd->cmd_len < 5)
1338 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1339 tf->protocol = ATA_PROT_NODATA;
1341 ; /* ignore IMMED bit, violates sat-r05 */
1344 goto invalid_fld; /* LOEJ bit set not supported */
1345 if (((cdb[4] >> 4) & 0xf) != 0)
1346 goto invalid_fld; /* power conditions not supported */
1349 tf->nsect = 1; /* 1 sector, lba=0 */
1351 if (qc->dev->flags & ATA_DFLAG_LBA) {
1352 tf->flags |= ATA_TFLAG_LBA;
1357 tf->device |= ATA_LBA;
1360 tf->lbal = 0x1; /* sect */
1361 tf->lbam = 0x0; /* cyl low */
1362 tf->lbah = 0x0; /* cyl high */
1365 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1367 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1368 * or S5) causing some drives to spin up and down again.
1370 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1371 system_state == SYSTEM_POWER_OFF)
1374 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1375 system_entering_hibernation())
1378 /* Issue ATA STANDBY IMMEDIATE command */
1379 tf->command = ATA_CMD_STANDBYNOW1;
1383 * Standby and Idle condition timers could be implemented but that
1384 * would require libata to implement the Power condition mode page
1385 * and allow the user to change it. Changing mode pages requires
1386 * MODE SELECT to be implemented.
1392 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1393 /* "Invalid field in cbd" */
1396 scmd->result = SAM_STAT_GOOD;
1402 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1403 * @qc: Storage for translated ATA taskfile
1405 * Sets up an ATA taskfile to issue FLUSH CACHE or
1409 * spin_lock_irqsave(host lock)
1412 * Zero on success, non-zero on error.
1414 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1416 struct ata_taskfile *tf = &qc->tf;
1418 tf->flags |= ATA_TFLAG_DEVICE;
1419 tf->protocol = ATA_PROT_NODATA;
1421 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1422 tf->command = ATA_CMD_FLUSH_EXT;
1424 tf->command = ATA_CMD_FLUSH;
1426 /* flush is critical for IO integrity, consider it an IO command */
1427 qc->flags |= ATA_QCFLAG_IO;
1433 * scsi_6_lba_len - Get LBA and transfer length
1434 * @cdb: SCSI command to translate
1436 * Calculate LBA and transfer length for 6-byte commands.
1440 * @plen: the transfer length
1442 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1447 VPRINTK("six-byte command\n");
1449 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1450 lba |= ((u64)cdb[2]) << 8;
1451 lba |= ((u64)cdb[3]);
1460 * scsi_10_lba_len - Get LBA and transfer length
1461 * @cdb: SCSI command to translate
1463 * Calculate LBA and transfer length for 10-byte commands.
1467 * @plen: the transfer length
1469 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1474 VPRINTK("ten-byte command\n");
1476 lba |= ((u64)cdb[2]) << 24;
1477 lba |= ((u64)cdb[3]) << 16;
1478 lba |= ((u64)cdb[4]) << 8;
1479 lba |= ((u64)cdb[5]);
1481 len |= ((u32)cdb[7]) << 8;
1482 len |= ((u32)cdb[8]);
1489 * scsi_16_lba_len - Get LBA and transfer length
1490 * @cdb: SCSI command to translate
1492 * Calculate LBA and transfer length for 16-byte commands.
1496 * @plen: the transfer length
1498 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1503 VPRINTK("sixteen-byte command\n");
1505 lba |= ((u64)cdb[2]) << 56;
1506 lba |= ((u64)cdb[3]) << 48;
1507 lba |= ((u64)cdb[4]) << 40;
1508 lba |= ((u64)cdb[5]) << 32;
1509 lba |= ((u64)cdb[6]) << 24;
1510 lba |= ((u64)cdb[7]) << 16;
1511 lba |= ((u64)cdb[8]) << 8;
1512 lba |= ((u64)cdb[9]);
1514 len |= ((u32)cdb[10]) << 24;
1515 len |= ((u32)cdb[11]) << 16;
1516 len |= ((u32)cdb[12]) << 8;
1517 len |= ((u32)cdb[13]);
1524 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1525 * @qc: Storage for translated ATA taskfile
1527 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1530 * spin_lock_irqsave(host lock)
1533 * Zero on success, non-zero on error.
1535 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1537 struct scsi_cmnd *scmd = qc->scsicmd;
1538 struct ata_taskfile *tf = &qc->tf;
1539 struct ata_device *dev = qc->dev;
1540 u64 dev_sectors = qc->dev->n_sectors;
1541 const u8 *cdb = scmd->cmnd;
1545 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1546 tf->protocol = ATA_PROT_NODATA;
1548 if (cdb[0] == VERIFY) {
1549 if (scmd->cmd_len < 10)
1551 scsi_10_lba_len(cdb, &block, &n_block);
1552 } else if (cdb[0] == VERIFY_16) {
1553 if (scmd->cmd_len < 16)
1555 scsi_16_lba_len(cdb, &block, &n_block);
1561 if (block >= dev_sectors)
1563 if ((block + n_block) > dev_sectors)
1566 if (dev->flags & ATA_DFLAG_LBA) {
1567 tf->flags |= ATA_TFLAG_LBA;
1569 if (lba_28_ok(block, n_block)) {
1571 tf->command = ATA_CMD_VERIFY;
1572 tf->device |= (block >> 24) & 0xf;
1573 } else if (lba_48_ok(block, n_block)) {
1574 if (!(dev->flags & ATA_DFLAG_LBA48))
1578 tf->flags |= ATA_TFLAG_LBA48;
1579 tf->command = ATA_CMD_VERIFY_EXT;
1581 tf->hob_nsect = (n_block >> 8) & 0xff;
1583 tf->hob_lbah = (block >> 40) & 0xff;
1584 tf->hob_lbam = (block >> 32) & 0xff;
1585 tf->hob_lbal = (block >> 24) & 0xff;
1587 /* request too large even for LBA48 */
1590 tf->nsect = n_block & 0xff;
1592 tf->lbah = (block >> 16) & 0xff;
1593 tf->lbam = (block >> 8) & 0xff;
1594 tf->lbal = block & 0xff;
1596 tf->device |= ATA_LBA;
1599 u32 sect, head, cyl, track;
1601 if (!lba_28_ok(block, n_block))
1604 /* Convert LBA to CHS */
1605 track = (u32)block / dev->sectors;
1606 cyl = track / dev->heads;
1607 head = track % dev->heads;
1608 sect = (u32)block % dev->sectors + 1;
1610 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1611 (u32)block, track, cyl, head, sect);
1613 /* Check whether the converted CHS can fit.
1617 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1620 tf->command = ATA_CMD_VERIFY;
1621 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1624 tf->lbah = cyl >> 8;
1631 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1632 /* "Invalid field in cbd" */
1636 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1637 /* "Logical Block Address out of range" */
1641 scmd->result = SAM_STAT_GOOD;
1646 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1647 * @qc: Storage for translated ATA taskfile
1649 * Converts any of six SCSI read/write commands into the
1650 * ATA counterpart, including starting sector (LBA),
1651 * sector count, and taking into account the device's LBA48
1654 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1655 * %WRITE_16 are currently supported.
1658 * spin_lock_irqsave(host lock)
1661 * Zero on success, non-zero on error.
1663 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1665 struct scsi_cmnd *scmd = qc->scsicmd;
1666 const u8 *cdb = scmd->cmnd;
1667 unsigned int tf_flags = 0;
1672 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1673 tf_flags |= ATA_TFLAG_WRITE;
1675 /* Calculate the SCSI LBA, transfer length and FUA. */
1679 if (unlikely(scmd->cmd_len < 10))
1681 scsi_10_lba_len(cdb, &block, &n_block);
1682 if (cdb[1] & (1 << 3))
1683 tf_flags |= ATA_TFLAG_FUA;
1687 if (unlikely(scmd->cmd_len < 6))
1689 scsi_6_lba_len(cdb, &block, &n_block);
1691 /* for 6-byte r/w commands, transfer length 0
1692 * means 256 blocks of data, not 0 block.
1699 if (unlikely(scmd->cmd_len < 16))
1701 scsi_16_lba_len(cdb, &block, &n_block);
1702 if (cdb[1] & (1 << 3))
1703 tf_flags |= ATA_TFLAG_FUA;
1706 DPRINTK("no-byte command\n");
1710 /* Check and compose ATA command */
1712 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1713 * length 0 means transfer 0 block of data.
1714 * However, for ATA R/W commands, sector count 0 means
1715 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1717 * WARNING: one or two older ATA drives treat 0 as 0...
1721 qc->flags |= ATA_QCFLAG_IO;
1722 qc->nbytes = n_block * scmd->device->sector_size;
1724 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1726 if (likely(rc == 0))
1731 /* treat all other errors as -EINVAL, fall through */
1733 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1734 /* "Invalid field in cbd" */
1738 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1739 /* "Logical Block Address out of range" */
1743 scmd->result = SAM_STAT_GOOD;
1747 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1749 struct ata_port *ap = qc->ap;
1750 struct scsi_cmnd *cmd = qc->scsicmd;
1751 u8 *cdb = cmd->cmnd;
1752 int need_sense = (qc->err_mask != 0);
1754 /* For ATA pass thru (SAT) commands, generate a sense block if
1755 * user mandated it or if there's an error. Note that if we
1756 * generate because the user forced us to [CK_COND =1], a check
1757 * condition is generated and the ATA register values are returned
1758 * whether the command completed successfully or not. If there
1759 * was no error, we use the following sense data:
1760 * sk = RECOVERED ERROR
1761 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1763 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1764 ((cdb[2] & 0x20) || need_sense)) {
1765 ata_gen_passthru_sense(qc);
1768 cmd->result = SAM_STAT_GOOD;
1770 /* TODO: decide which descriptor format to use
1771 * for 48b LBA devices and call that here
1772 * instead of the fixed desc, which is only
1773 * good for smaller LBA (and maybe CHS?)
1776 ata_gen_ata_sense(qc);
1780 if (need_sense && !ap->ops->error_handler)
1781 ata_dump_status(ap->print_id, &qc->result_tf);
1789 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1790 * @dev: ATA device to which the command is addressed
1791 * @cmd: SCSI command to execute
1792 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1794 * Our ->queuecommand() function has decided that the SCSI
1795 * command issued can be directly translated into an ATA
1796 * command, rather than handled internally.
1798 * This function sets up an ata_queued_cmd structure for the
1799 * SCSI command, and sends that ata_queued_cmd to the hardware.
1801 * The xlat_func argument (actor) returns 0 if ready to execute
1802 * ATA command, else 1 to finish translation. If 1 is returned
1803 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1804 * to be set reflecting an error condition or clean (early)
1808 * spin_lock_irqsave(host lock)
1811 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1812 * needs to be deferred.
1814 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1815 ata_xlat_func_t xlat_func)
1817 struct ata_port *ap = dev->link->ap;
1818 struct ata_queued_cmd *qc;
1823 qc = ata_scsi_qc_new(dev, cmd);
1827 /* data is present; dma-map it */
1828 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1829 cmd->sc_data_direction == DMA_TO_DEVICE) {
1830 if (unlikely(scsi_bufflen(cmd) < 1)) {
1831 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
1835 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1837 qc->dma_dir = cmd->sc_data_direction;
1840 qc->complete_fn = ata_scsi_qc_complete;
1845 if (ap->ops->qc_defer) {
1846 if ((rc = ap->ops->qc_defer(qc)))
1850 /* select device, send command to hardware */
1858 cmd->scsi_done(cmd);
1859 DPRINTK("EXIT - early finish (good or error)\n");
1864 cmd->result = (DID_ERROR << 16);
1865 cmd->scsi_done(cmd);
1867 DPRINTK("EXIT - internal\n");
1872 DPRINTK("EXIT - defer\n");
1873 if (rc == ATA_DEFER_LINK)
1874 return SCSI_MLQUEUE_DEVICE_BUSY;
1876 return SCSI_MLQUEUE_HOST_BUSY;
1880 * ata_scsi_rbuf_get - Map response buffer.
1881 * @cmd: SCSI command containing buffer to be mapped.
1882 * @flags: unsigned long variable to store irq enable status
1883 * @copy_in: copy in from user buffer
1885 * Prepare buffer for simulated SCSI commands.
1888 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1891 * Pointer to response buffer.
1893 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1894 unsigned long *flags)
1896 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1898 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1900 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1901 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1902 return ata_scsi_rbuf;
1906 * ata_scsi_rbuf_put - Unmap response buffer.
1907 * @cmd: SCSI command containing buffer to be unmapped.
1908 * @copy_out: copy out result
1909 * @flags: @flags passed to ata_scsi_rbuf_get()
1911 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1912 * @copy_back is true.
1915 * Unlocks ata_scsi_rbuf_lock.
1917 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1918 unsigned long *flags)
1921 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1922 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1923 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1927 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1928 * @args: device IDENTIFY data / SCSI command of interest.
1929 * @actor: Callback hook for desired SCSI command simulator
1931 * Takes care of the hard work of simulating a SCSI command...
1932 * Mapping the response buffer, calling the command's handler,
1933 * and handling the handler's return value. This return value
1934 * indicates whether the handler wishes the SCSI command to be
1935 * completed successfully (0), or not (in which case cmd->result
1936 * and sense buffer are assumed to be set).
1939 * spin_lock_irqsave(host lock)
1941 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1942 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1946 struct scsi_cmnd *cmd = args->cmd;
1947 unsigned long flags;
1949 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1950 rc = actor(args, rbuf);
1951 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
1954 cmd->result = SAM_STAT_GOOD;
1959 * ata_scsiop_inq_std - Simulate INQUIRY command
1960 * @args: device IDENTIFY data / SCSI command of interest.
1961 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1963 * Returns standard device identification data associated
1964 * with non-VPD INQUIRY command output.
1967 * spin_lock_irqsave(host lock)
1969 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1971 const u8 versions[] = {
1972 0x60, /* SAM-3 (no version claimed) */
1975 0x20, /* SBC-2 (no version claimed) */
1978 0x60 /* SPC-3 (no version claimed) */
1983 0x5, /* claim SPC-3 version compatibility */
1990 /* set scsi removeable (RMB) bit per ata bit */
1991 if (ata_id_removeable(args->id))
1994 memcpy(rbuf, hdr, sizeof(hdr));
1995 memcpy(&rbuf[8], "ATA ", 8);
1996 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1998 /* From SAT, use last 2 words from fw rev unless they are spaces */
1999 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
2000 if (strncmp(&rbuf[32], " ", 4) == 0)
2001 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2003 if (rbuf[32] == 0 || rbuf[32] == ' ')
2004 memcpy(&rbuf[32], "n/a ", 4);
2006 memcpy(rbuf + 59, versions, sizeof(versions));
2012 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2013 * @args: device IDENTIFY data / SCSI command of interest.
2014 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2016 * Returns list of inquiry VPD pages available.
2019 * spin_lock_irqsave(host lock)
2021 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
2023 const u8 pages[] = {
2024 0x00, /* page 0x00, this page */
2025 0x80, /* page 0x80, unit serial no page */
2026 0x83, /* page 0x83, device ident page */
2027 0x89, /* page 0x89, ata info page */
2028 0xb0, /* page 0xb0, block limits page */
2029 0xb1, /* page 0xb1, block device characteristics page */
2030 0xb2, /* page 0xb2, thin provisioning page */
2033 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
2034 memcpy(rbuf + 4, pages, sizeof(pages));
2039 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2040 * @args: device IDENTIFY data / SCSI command of interest.
2041 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2043 * Returns ATA device serial number.
2046 * spin_lock_irqsave(host lock)
2048 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2052 0x80, /* this page code */
2054 ATA_ID_SERNO_LEN, /* page len */
2057 memcpy(rbuf, hdr, sizeof(hdr));
2058 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2059 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2064 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2065 * @args: device IDENTIFY data / SCSI command of interest.
2066 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2068 * Yields two logical unit device identification designators:
2069 * - vendor specific ASCII containing the ATA serial number
2070 * - SAT defined "t10 vendor id based" containing ASCII vendor
2071 * name ("ATA "), model and serial numbers.
2074 * spin_lock_irqsave(host lock)
2076 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2078 const int sat_model_serial_desc_len = 68;
2081 rbuf[1] = 0x83; /* this page code */
2084 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2086 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2088 ata_id_string(args->id, (unsigned char *) rbuf + num,
2089 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2090 num += ATA_ID_SERNO_LEN;
2092 /* SAT defined lu model and serial numbers descriptor */
2093 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2096 rbuf[num + 3] = sat_model_serial_desc_len;
2098 memcpy(rbuf + num, "ATA ", 8);
2100 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2102 num += ATA_ID_PROD_LEN;
2103 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2105 num += ATA_ID_SERNO_LEN;
2107 if (ata_id_has_wwn(args->id)) {
2108 /* SAT defined lu world wide name */
2109 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2112 rbuf[num + 3] = ATA_ID_WWN_LEN;
2114 ata_id_string(args->id, (unsigned char *) rbuf + num,
2115 ATA_ID_WWN, ATA_ID_WWN_LEN);
2116 num += ATA_ID_WWN_LEN;
2118 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2123 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2124 * @args: device IDENTIFY data / SCSI command of interest.
2125 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2127 * Yields SAT-specified ATA VPD page.
2130 * spin_lock_irqsave(host lock)
2132 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2134 struct ata_taskfile tf;
2136 memset(&tf, 0, sizeof(tf));
2138 rbuf[1] = 0x89; /* our page code */
2139 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2140 rbuf[3] = (0x238 & 0xff);
2142 memcpy(&rbuf[8], "linux ", 8);
2143 memcpy(&rbuf[16], "libata ", 16);
2144 memcpy(&rbuf[32], DRV_VERSION, 4);
2146 /* we don't store the ATA device signature, so we fake it */
2148 tf.command = ATA_DRDY; /* really, this is Status reg */
2152 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2153 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2155 rbuf[56] = ATA_CMD_ID_ATA;
2157 memcpy(&rbuf[60], &args->id[0], 512);
2161 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2166 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2169 * Optimal transfer length granularity.
2171 * This is always one physical block, but for disks with a smaller
2172 * logical than physical sector size we need to figure out what the
2175 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2176 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2179 * Optimal unmap granularity.
2181 * The ATA spec doesn't even know about a granularity or alignment
2182 * for the TRIM command. We can leave away most of the unmap related
2183 * VPD page entries, but we have specifify a granularity to signal
2184 * that we support some form of unmap - in thise case via WRITE SAME
2185 * with the unmap bit set.
2187 if (ata_id_has_trim(args->id)) {
2188 put_unaligned_be64(65535 * 512 / 8, &rbuf[36]);
2189 put_unaligned_be32(1, &rbuf[28]);
2195 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2197 int form_factor = ata_id_form_factor(args->id);
2198 int media_rotation_rate = ata_id_rotation_rate(args->id);
2202 rbuf[4] = media_rotation_rate >> 8;
2203 rbuf[5] = media_rotation_rate;
2204 rbuf[7] = form_factor;
2209 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2211 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2214 rbuf[5] = 1 << 6; /* TPWS */
2220 * ata_scsiop_noop - Command handler that simply returns success.
2221 * @args: device IDENTIFY data / SCSI command of interest.
2222 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2224 * No operation. Simply returns success to caller, to indicate
2225 * that the caller should successfully complete this SCSI command.
2228 * spin_lock_irqsave(host lock)
2230 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
2237 * modecpy - Prepare response for MODE SENSE
2238 * @dest: output buffer
2239 * @src: data being copied
2240 * @n: length of mode page
2241 * @changeable: whether changeable parameters are requested
2243 * Generate a generic MODE SENSE page for either current or changeable
2249 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2252 memcpy(dest, src, 2);
2253 memset(dest + 2, 0, n - 2);
2255 memcpy(dest, src, n);
2260 * ata_msense_caching - Simulate MODE SENSE caching info page
2261 * @id: device IDENTIFY data
2262 * @buf: output buffer
2263 * @changeable: whether changeable parameters are requested
2265 * Generate a caching info page, which conditionally indicates
2266 * write caching to the SCSI layer, depending on device
2272 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2274 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2275 if (changeable || ata_id_wcache_enabled(id))
2276 buf[2] |= (1 << 2); /* write cache enable */
2277 if (!changeable && !ata_id_rahead_enabled(id))
2278 buf[12] |= (1 << 5); /* disable read ahead */
2279 return sizeof(def_cache_mpage);
2283 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2284 * @buf: output buffer
2285 * @changeable: whether changeable parameters are requested
2287 * Generate a generic MODE SENSE control mode page.
2292 static unsigned int ata_msense_ctl_mode(u8 *buf, bool changeable)
2294 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2295 return sizeof(def_control_mpage);
2299 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2300 * @buf: output buffer
2301 * @changeable: whether changeable parameters are requested
2303 * Generate a generic MODE SENSE r/w error recovery page.
2308 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2310 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2312 return sizeof(def_rw_recovery_mpage);
2316 * We can turn this into a real blacklist if it's needed, for now just
2317 * blacklist any Maxtor BANC1G10 revision firmware
2319 static int ata_dev_supports_fua(u16 *id)
2321 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2325 if (!ata_id_has_fua(id))
2328 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2329 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2331 if (strcmp(model, "Maxtor"))
2333 if (strcmp(fw, "BANC1G10"))
2336 return 0; /* blacklisted */
2340 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2341 * @args: device IDENTIFY data / SCSI command of interest.
2342 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2344 * Simulate MODE SENSE commands. Assume this is invoked for direct
2345 * access devices (e.g. disks) only. There should be no block
2346 * descriptor for other device types.
2349 * spin_lock_irqsave(host lock)
2351 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2353 struct ata_device *dev = args->dev;
2354 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2355 const u8 sat_blk_desc[] = {
2356 0, 0, 0, 0, /* number of blocks: sat unspecified */
2358 0, 0x2, 0x0 /* block length: 512 bytes */
2361 unsigned int ebd, page_control, six_byte;
2366 six_byte = (scsicmd[0] == MODE_SENSE);
2367 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2369 * LLBA bit in msense(10) ignored (compliant)
2372 page_control = scsicmd[2] >> 6;
2373 switch (page_control) {
2374 case 0: /* current */
2375 case 1: /* changeable */
2376 case 2: /* defaults */
2377 break; /* supported */
2379 goto saving_not_supp;
2385 p += 4 + (ebd ? 8 : 0);
2387 p += 8 + (ebd ? 8 : 0);
2389 pg = scsicmd[2] & 0x3f;
2392 * No mode subpages supported (yet) but asking for _all_
2393 * subpages may be valid
2395 if (spg && (spg != ALL_SUB_MPAGES))
2399 case RW_RECOVERY_MPAGE:
2400 p += ata_msense_rw_recovery(p, page_control == 1);
2404 p += ata_msense_caching(args->id, p, page_control == 1);
2408 p += ata_msense_ctl_mode(p, page_control == 1);
2412 p += ata_msense_rw_recovery(p, page_control == 1);
2413 p += ata_msense_caching(args->id, p, page_control == 1);
2414 p += ata_msense_ctl_mode(p, page_control == 1);
2417 default: /* invalid page code */
2422 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2423 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2427 rbuf[0] = p - rbuf - 1;
2430 rbuf[3] = sizeof(sat_blk_desc);
2431 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2434 unsigned int output_len = p - rbuf - 2;
2436 rbuf[0] = output_len >> 8;
2437 rbuf[1] = output_len;
2440 rbuf[7] = sizeof(sat_blk_desc);
2441 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2447 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2448 /* "Invalid field in cbd" */
2452 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2453 /* "Saving parameters not supported" */
2458 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2459 * @args: device IDENTIFY data / SCSI command of interest.
2460 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2462 * Simulate READ CAPACITY commands.
2467 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2469 struct ata_device *dev = args->dev;
2470 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2471 u32 sector_size; /* physical sector size in bytes */
2475 sector_size = ata_id_logical_sector_size(dev->id);
2476 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2477 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2481 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2482 if (last_lba >= 0xffffffffULL)
2483 last_lba = 0xffffffff;
2485 /* sector count, 32-bit */
2486 rbuf[0] = last_lba >> (8 * 3);
2487 rbuf[1] = last_lba >> (8 * 2);
2488 rbuf[2] = last_lba >> (8 * 1);
2492 rbuf[4] = sector_size >> (8 * 3);
2493 rbuf[5] = sector_size >> (8 * 2);
2494 rbuf[6] = sector_size >> (8 * 1);
2495 rbuf[7] = sector_size;
2497 /* sector count, 64-bit */
2498 rbuf[0] = last_lba >> (8 * 7);
2499 rbuf[1] = last_lba >> (8 * 6);
2500 rbuf[2] = last_lba >> (8 * 5);
2501 rbuf[3] = last_lba >> (8 * 4);
2502 rbuf[4] = last_lba >> (8 * 3);
2503 rbuf[5] = last_lba >> (8 * 2);
2504 rbuf[6] = last_lba >> (8 * 1);
2508 rbuf[ 8] = sector_size >> (8 * 3);
2509 rbuf[ 9] = sector_size >> (8 * 2);
2510 rbuf[10] = sector_size >> (8 * 1);
2511 rbuf[11] = sector_size;
2514 rbuf[13] = log2_per_phys;
2515 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2516 rbuf[15] = lowest_aligned;
2518 if (ata_id_has_trim(args->id)) {
2519 rbuf[14] |= 0x80; /* TPE */
2521 if (ata_id_has_zero_after_trim(args->id))
2522 rbuf[14] |= 0x40; /* TPRZ */
2530 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2531 * @args: device IDENTIFY data / SCSI command of interest.
2532 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2534 * Simulate REPORT LUNS command.
2537 * spin_lock_irqsave(host lock)
2539 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2542 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2547 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2549 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2550 /* FIXME: not quite right; we don't want the
2551 * translation of taskfile registers into
2552 * a sense descriptors, since that's only
2553 * correct for ATA, not ATAPI
2555 ata_gen_passthru_sense(qc);
2558 qc->scsidone(qc->scsicmd);
2562 /* is it pointless to prefer PIO for "safety reasons"? */
2563 static inline int ata_pio_use_silly(struct ata_port *ap)
2565 return (ap->flags & ATA_FLAG_PIO_DMA);
2568 static void atapi_request_sense(struct ata_queued_cmd *qc)
2570 struct ata_port *ap = qc->ap;
2571 struct scsi_cmnd *cmd = qc->scsicmd;
2573 DPRINTK("ATAPI request sense\n");
2575 /* FIXME: is this needed? */
2576 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2578 #ifdef CONFIG_ATA_SFF
2579 if (ap->ops->sff_tf_read)
2580 ap->ops->sff_tf_read(ap, &qc->tf);
2583 /* fill these in, for the case where they are -not- overwritten */
2584 cmd->sense_buffer[0] = 0x70;
2585 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2589 /* setup sg table and init transfer direction */
2590 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2591 ata_sg_init(qc, &qc->sgent, 1);
2592 qc->dma_dir = DMA_FROM_DEVICE;
2594 memset(&qc->cdb, 0, qc->dev->cdb_len);
2595 qc->cdb[0] = REQUEST_SENSE;
2596 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2598 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2599 qc->tf.command = ATA_CMD_PACKET;
2601 if (ata_pio_use_silly(ap)) {
2602 qc->tf.protocol = ATAPI_PROT_DMA;
2603 qc->tf.feature |= ATAPI_PKT_DMA;
2605 qc->tf.protocol = ATAPI_PROT_PIO;
2606 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2609 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2611 qc->complete_fn = atapi_sense_complete;
2618 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2620 struct scsi_cmnd *cmd = qc->scsicmd;
2621 unsigned int err_mask = qc->err_mask;
2623 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2625 /* handle completion from new EH */
2626 if (unlikely(qc->ap->ops->error_handler &&
2627 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2629 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2630 /* FIXME: not quite right; we don't want the
2631 * translation of taskfile registers into a
2632 * sense descriptors, since that's only
2633 * correct for ATA, not ATAPI
2635 ata_gen_passthru_sense(qc);
2638 /* SCSI EH automatically locks door if sdev->locked is
2639 * set. Sometimes door lock request continues to
2640 * fail, for example, when no media is present. This
2641 * creates a loop - SCSI EH issues door lock which
2642 * fails and gets invoked again to acquire sense data
2643 * for the failed command.
2645 * If door lock fails, always clear sdev->locked to
2646 * avoid this infinite loop.
2648 * This may happen before SCSI scan is complete. Make
2649 * sure qc->dev->sdev isn't NULL before dereferencing.
2651 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2652 qc->dev->sdev->locked = 0;
2654 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2660 /* successful completion or old EH failure path */
2661 if (unlikely(err_mask & AC_ERR_DEV)) {
2662 cmd->result = SAM_STAT_CHECK_CONDITION;
2663 atapi_request_sense(qc);
2665 } else if (unlikely(err_mask)) {
2666 /* FIXME: not quite right; we don't want the
2667 * translation of taskfile registers into
2668 * a sense descriptors, since that's only
2669 * correct for ATA, not ATAPI
2671 ata_gen_passthru_sense(qc);
2673 u8 *scsicmd = cmd->cmnd;
2675 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2676 unsigned long flags;
2679 buf = ata_scsi_rbuf_get(cmd, true, &flags);
2681 /* ATAPI devices typically report zero for their SCSI version,
2682 * and sometimes deviate from the spec WRT response data
2683 * format. If SCSI version is reported as zero like normal,
2684 * then we make the following fixups: 1) Fake MMC-5 version,
2685 * to indicate to the Linux scsi midlayer this is a modern
2686 * device. 2) Ensure response data format / ATAPI information
2687 * are always correct.
2694 ata_scsi_rbuf_put(cmd, true, &flags);
2697 cmd->result = SAM_STAT_GOOD;
2704 * atapi_xlat - Initialize PACKET taskfile
2705 * @qc: command structure to be initialized
2708 * spin_lock_irqsave(host lock)
2711 * Zero on success, non-zero on failure.
2713 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2715 struct scsi_cmnd *scmd = qc->scsicmd;
2716 struct ata_device *dev = qc->dev;
2717 int nodata = (scmd->sc_data_direction == DMA_NONE);
2718 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2719 unsigned int nbytes;
2721 memset(qc->cdb, 0, dev->cdb_len);
2722 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2724 qc->complete_fn = atapi_qc_complete;
2726 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2727 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2728 qc->tf.flags |= ATA_TFLAG_WRITE;
2729 DPRINTK("direction: write\n");
2732 qc->tf.command = ATA_CMD_PACKET;
2733 ata_qc_set_pc_nbytes(qc);
2735 /* check whether ATAPI DMA is safe */
2736 if (!nodata && !using_pio && atapi_check_dma(qc))
2739 /* Some controller variants snoop this value for Packet
2740 * transfers to do state machine and FIFO management. Thus we
2741 * want to set it properly, and for DMA where it is
2742 * effectively meaningless.
2744 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2746 /* Most ATAPI devices which honor transfer chunk size don't
2747 * behave according to the spec when odd chunk size which
2748 * matches the transfer length is specified. If the number of
2749 * bytes to transfer is 2n+1. According to the spec, what
2750 * should happen is to indicate that 2n+1 is going to be
2751 * transferred and transfer 2n+2 bytes where the last byte is
2754 * In practice, this doesn't happen. ATAPI devices first
2755 * indicate and transfer 2n bytes and then indicate and
2756 * transfer 2 bytes where the last byte is padding.
2758 * This inconsistency confuses several controllers which
2759 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2760 * These controllers use actual number of transferred bytes to
2761 * update DMA poitner and transfer of 4n+2 bytes make those
2762 * controller push DMA pointer by 4n+4 bytes because SATA data
2763 * FISes are aligned to 4 bytes. This causes data corruption
2764 * and buffer overrun.
2766 * Always setting nbytes to even number solves this problem
2767 * because then ATAPI devices don't have to split data at 2n
2773 qc->tf.lbam = (nbytes & 0xFF);
2774 qc->tf.lbah = (nbytes >> 8);
2777 qc->tf.protocol = ATAPI_PROT_NODATA;
2779 qc->tf.protocol = ATAPI_PROT_PIO;
2782 qc->tf.protocol = ATAPI_PROT_DMA;
2783 qc->tf.feature |= ATAPI_PKT_DMA;
2785 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2786 (scmd->sc_data_direction != DMA_TO_DEVICE))
2787 /* some SATA bridges need us to indicate data xfer direction */
2788 qc->tf.feature |= ATAPI_DMADIR;
2792 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2793 as ATAPI tape drives don't get this right otherwise */
2797 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2799 if (!sata_pmp_attached(ap)) {
2800 if (likely(devno < ata_link_max_devices(&ap->link)))
2801 return &ap->link.device[devno];
2803 if (likely(devno < ap->nr_pmp_links))
2804 return &ap->pmp_link[devno].device[0];
2810 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2811 const struct scsi_device *scsidev)
2815 /* skip commands not addressed to targets we simulate */
2816 if (!sata_pmp_attached(ap)) {
2817 if (unlikely(scsidev->channel || scsidev->lun))
2819 devno = scsidev->id;
2821 if (unlikely(scsidev->id || scsidev->lun))
2823 devno = scsidev->channel;
2826 return ata_find_dev(ap, devno);
2830 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2831 * @ap: ATA port to which the device is attached
2832 * @scsidev: SCSI device from which we derive the ATA device
2834 * Given various information provided in struct scsi_cmnd,
2835 * map that onto an ATA bus, and using that mapping
2836 * determine which ata_device is associated with the
2837 * SCSI command to be sent.
2840 * spin_lock_irqsave(host lock)
2843 * Associated ATA device, or %NULL if not found.
2845 static struct ata_device *
2846 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2848 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2850 if (unlikely(!dev || !ata_dev_enabled(dev)))
2857 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2858 * @byte1: Byte 1 from pass-thru CDB.
2861 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2864 ata_scsi_map_proto(u8 byte1)
2866 switch((byte1 & 0x1e) >> 1) {
2867 case 3: /* Non-data */
2868 return ATA_PROT_NODATA;
2871 case 10: /* UDMA Data-in */
2872 case 11: /* UDMA Data-Out */
2873 return ATA_PROT_DMA;
2875 case 4: /* PIO Data-in */
2876 case 5: /* PIO Data-out */
2877 return ATA_PROT_PIO;
2879 case 0: /* Hard Reset */
2881 case 8: /* Device Diagnostic */
2882 case 9: /* Device Reset */
2883 case 7: /* DMA Queued */
2884 case 12: /* FPDMA */
2885 case 15: /* Return Response Info */
2886 default: /* Reserved */
2890 return ATA_PROT_UNKNOWN;
2894 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2895 * @qc: command structure to be initialized
2897 * Handles either 12 or 16-byte versions of the CDB.
2900 * Zero on success, non-zero on failure.
2902 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2904 struct ata_taskfile *tf = &(qc->tf);
2905 struct scsi_cmnd *scmd = qc->scsicmd;
2906 struct ata_device *dev = qc->dev;
2907 const u8 *cdb = scmd->cmnd;
2909 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2913 * 12 and 16 byte CDBs use different offsets to
2914 * provide the various register values.
2916 if (cdb[0] == ATA_16) {
2918 * 16-byte CDB - may contain extended commands.
2920 * If that is the case, copy the upper byte register values.
2922 if (cdb[1] & 0x01) {
2923 tf->hob_feature = cdb[3];
2924 tf->hob_nsect = cdb[5];
2925 tf->hob_lbal = cdb[7];
2926 tf->hob_lbam = cdb[9];
2927 tf->hob_lbah = cdb[11];
2928 tf->flags |= ATA_TFLAG_LBA48;
2930 tf->flags &= ~ATA_TFLAG_LBA48;
2933 * Always copy low byte, device and command registers.
2935 tf->feature = cdb[4];
2940 tf->device = cdb[13];
2941 tf->command = cdb[14];
2944 * 12-byte CDB - incapable of extended commands.
2946 tf->flags &= ~ATA_TFLAG_LBA48;
2948 tf->feature = cdb[3];
2953 tf->device = cdb[8];
2954 tf->command = cdb[9];
2957 /* enforce correct master/slave bit */
2958 tf->device = dev->devno ?
2959 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2961 switch (tf->command) {
2962 /* READ/WRITE LONG use a non-standard sect_size */
2963 case ATA_CMD_READ_LONG:
2964 case ATA_CMD_READ_LONG_ONCE:
2965 case ATA_CMD_WRITE_LONG:
2966 case ATA_CMD_WRITE_LONG_ONCE:
2967 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2969 qc->sect_size = scsi_bufflen(scmd);
2972 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2973 case ATA_CMD_CFA_WRITE_NE:
2974 case ATA_CMD_CFA_TRANS_SECT:
2975 case ATA_CMD_CFA_WRITE_MULT_NE:
2976 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2978 case ATA_CMD_READ_EXT:
2979 case ATA_CMD_READ_QUEUED:
2980 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2981 case ATA_CMD_FPDMA_READ:
2982 case ATA_CMD_READ_MULTI:
2983 case ATA_CMD_READ_MULTI_EXT:
2984 case ATA_CMD_PIO_READ:
2985 case ATA_CMD_PIO_READ_EXT:
2986 case ATA_CMD_READ_STREAM_DMA_EXT:
2987 case ATA_CMD_READ_STREAM_EXT:
2988 case ATA_CMD_VERIFY:
2989 case ATA_CMD_VERIFY_EXT:
2991 case ATA_CMD_WRITE_EXT:
2992 case ATA_CMD_WRITE_FUA_EXT:
2993 case ATA_CMD_WRITE_QUEUED:
2994 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
2995 case ATA_CMD_FPDMA_WRITE:
2996 case ATA_CMD_WRITE_MULTI:
2997 case ATA_CMD_WRITE_MULTI_EXT:
2998 case ATA_CMD_WRITE_MULTI_FUA_EXT:
2999 case ATA_CMD_PIO_WRITE:
3000 case ATA_CMD_PIO_WRITE_EXT:
3001 case ATA_CMD_WRITE_STREAM_DMA_EXT:
3002 case ATA_CMD_WRITE_STREAM_EXT:
3003 qc->sect_size = scmd->device->sector_size;
3006 /* Everything else uses 512 byte "sectors" */
3008 qc->sect_size = ATA_SECT_SIZE;
3012 * Set flags so that all registers will be written, pass on
3013 * write indication (used for PIO/DMA setup), result TF is
3014 * copied back and we don't whine too much about its failure.
3016 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3017 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3018 tf->flags |= ATA_TFLAG_WRITE;
3020 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3023 * Set transfer length.
3025 * TODO: find out if we need to do more here to
3026 * cover scatter/gather case.
3028 ata_qc_set_pc_nbytes(qc);
3030 /* We may not issue DMA commands if no DMA mode is set */
3031 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
3034 /* sanity check for pio multi commands */
3035 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
3038 if (is_multi_taskfile(tf)) {
3039 unsigned int multi_count = 1 << (cdb[1] >> 5);
3041 /* compare the passed through multi_count
3042 * with the cached multi_count of libata
3044 if (multi_count != dev->multi_count)
3045 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3050 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3051 * SET_FEATURES - XFER MODE must be preceded/succeeded
3052 * by an update to hardware-specific registers for each
3053 * controller (i.e. the reason for ->set_piomode(),
3054 * ->set_dmamode(), and ->post_set_mode() hooks).
3056 if (tf->command == ATA_CMD_SET_FEATURES &&
3057 tf->feature == SETFEATURES_XFER)
3061 * Filter TPM commands by default. These provide an
3062 * essentially uncontrolled encrypted "back door" between
3063 * applications and the disk. Set libata.allow_tpm=1 if you
3064 * have a real reason for wanting to use them. This ensures
3065 * that installed software cannot easily mess stuff up without
3066 * user intent. DVR type users will probably ship with this enabled
3067 * for movie content management.
3069 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3070 * for this and should do in future but that it is not sufficient as
3071 * DCS is an optional feature set. Thus we also do the software filter
3072 * so that we comply with the TC consortium stated goal that the user
3073 * can turn off TC features of their system.
3075 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
3081 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3082 /* "Invalid field in cdb" */
3086 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3088 struct ata_taskfile *tf = &qc->tf;
3089 struct scsi_cmnd *scmd = qc->scsicmd;
3090 struct ata_device *dev = qc->dev;
3091 const u8 *cdb = scmd->cmnd;
3097 /* we may not issue DMA commands if no DMA mode is set */
3098 if (unlikely(!dev->dma_mode))
3101 if (unlikely(scmd->cmd_len < 16))
3103 scsi_16_lba_len(cdb, &block, &n_block);
3105 /* for now we only support WRITE SAME with the unmap bit set */
3106 if (unlikely(!(cdb[1] & 0x8)))
3110 * WRITE SAME always has a sector sized buffer as payload, this
3111 * should never be a multiple entry S/G list.
3113 if (!scsi_sg_count(scmd))
3116 buf = page_address(sg_page(scsi_sglist(scmd)));
3117 size = ata_set_lba_range_entries(buf, 512, block, n_block);
3119 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3120 /* Newer devices support queued TRIM commands */
3121 tf->protocol = ATA_PROT_NCQ;
3122 tf->command = ATA_CMD_FPDMA_SEND;
3123 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3124 tf->nsect = qc->tag << 3;
3125 tf->hob_feature = (size / 512) >> 8;
3126 tf->feature = size / 512;
3130 tf->protocol = ATA_PROT_DMA;
3131 tf->hob_feature = 0;
3132 tf->feature = ATA_DSM_TRIM;
3133 tf->hob_nsect = (size / 512) >> 8;
3134 tf->nsect = size / 512;
3135 tf->command = ATA_CMD_DSM;
3138 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3141 ata_qc_set_pc_nbytes(qc);
3146 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3147 /* "Invalid field in cdb" */
3152 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3153 * @qc: Storage for translated ATA taskfile
3154 * @buf: input buffer
3155 * @len: number of valid bytes in the input buffer
3157 * Prepare a taskfile to modify caching information for the device.
3162 static int ata_mselect_caching(struct ata_queued_cmd *qc,
3163 const u8 *buf, int len)
3165 struct ata_taskfile *tf = &qc->tf;
3166 struct ata_device *dev = qc->dev;
3167 char mpage[CACHE_MPAGE_LEN];
3171 * The first two bytes of def_cache_mpage are a header, so offsets
3172 * in mpage are off by 2 compared to buf. Same for len.
3175 if (len != CACHE_MPAGE_LEN - 2)
3178 wce = buf[0] & (1 << 2);
3181 * Check that read-only bits are not modified.
3183 ata_msense_caching(dev->id, mpage, false);
3184 mpage[2] &= ~(1 << 2);
3186 if (memcmp(mpage + 2, buf, CACHE_MPAGE_LEN - 2) != 0)
3189 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3190 tf->protocol = ATA_PROT_NODATA;
3192 tf->command = ATA_CMD_SET_FEATURES;
3193 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3198 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
3199 * @qc: Storage for translated ATA taskfile
3201 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3202 * Assume this is invoked for direct access devices (e.g. disks) only.
3203 * There should be no block descriptor for other device types.
3206 * spin_lock_irqsave(host lock)
3208 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3210 struct scsi_cmnd *scmd = qc->scsicmd;
3211 const u8 *cdb = scmd->cmnd;
3214 unsigned six_byte, pg_len, hdr_len, bd_len;
3219 six_byte = (cdb[0] == MODE_SELECT);
3221 if (scmd->cmd_len < 5)
3227 if (scmd->cmd_len < 9)
3230 len = (cdb[7] << 8) + cdb[8];
3234 /* We only support PF=1, SP=0. */
3235 if ((cdb[1] & 0x11) != 0x10)
3238 /* Test early for possible overrun. */
3239 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
3240 goto invalid_param_len;
3242 p = page_address(sg_page(scsi_sglist(scmd)));
3244 /* Move past header and block descriptors. */
3246 goto invalid_param_len;
3251 bd_len = (p[6] << 8) + p[7];
3256 goto invalid_param_len;
3257 if (bd_len != 0 && bd_len != 8)
3265 /* Parse both possible formats for the mode page headers. */
3269 goto invalid_param_len;
3272 pg_len = (p[2] << 8) | p[3];
3277 goto invalid_param_len;
3286 * No mode subpages supported (yet) but asking for _all_
3287 * subpages may be valid
3289 if (spg && (spg != ALL_SUB_MPAGES))
3292 goto invalid_param_len;
3296 if (ata_mselect_caching(qc, p, pg_len) < 0)
3300 default: /* invalid page code */
3305 * Only one page has changeable data, so we only support setting one
3314 /* "Invalid field in CDB" */
3315 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
3319 /* "Invalid field in parameter list" */
3320 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x26, 0x0);
3324 /* "Parameter list length error" */
3325 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3329 scmd->result = SAM_STAT_GOOD;
3334 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3336 * @cmd: SCSI command opcode to consider
3338 * Look up the SCSI command given, and determine whether the
3339 * SCSI command is to be translated or simulated.
3342 * Pointer to translation function if possible, %NULL if not.
3345 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3355 return ata_scsi_rw_xlat;
3358 return ata_scsi_write_same_xlat;
3360 case SYNCHRONIZE_CACHE:
3361 if (ata_try_flush_cache(dev))
3362 return ata_scsi_flush_xlat;
3367 return ata_scsi_verify_xlat;
3371 return ata_scsi_pass_thru;
3374 case MODE_SELECT_10:
3375 return ata_scsi_mode_select_xlat;
3379 return ata_scsi_start_stop_xlat;
3386 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3387 * @ap: ATA port to which the command was being sent
3388 * @cmd: SCSI command to dump
3390 * Prints the contents of a SCSI command via printk().
3393 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3394 struct scsi_cmnd *cmd)
3397 struct scsi_device *scsidev = cmd->device;
3398 u8 *scsicmd = cmd->cmnd;
3400 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
3402 scsidev->channel, scsidev->id, scsidev->lun,
3403 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3404 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3409 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
3410 struct ata_device *dev)
3412 u8 scsi_op = scmd->cmnd[0];
3413 ata_xlat_func_t xlat_func;
3416 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
3417 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3420 xlat_func = ata_get_xlat_func(dev, scsi_op);
3422 if (unlikely(!scmd->cmd_len))
3426 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3427 /* relay SCSI command to ATAPI device */
3428 int len = COMMAND_SIZE(scsi_op);
3429 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
3432 xlat_func = atapi_xlat;
3434 /* ATA_16 passthru, treat as an ATA command */
3435 if (unlikely(scmd->cmd_len > 16))
3438 xlat_func = ata_get_xlat_func(dev, scsi_op);
3443 rc = ata_scsi_translate(dev, scmd, xlat_func);
3445 ata_scsi_simulate(dev, scmd);
3450 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3451 scmd->cmd_len, scsi_op, dev->cdb_len);
3452 scmd->result = DID_ERROR << 16;
3453 scmd->scsi_done(scmd);
3458 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3459 * @shost: SCSI host of command to be sent
3460 * @cmd: SCSI command to be sent
3462 * In some cases, this function translates SCSI commands into
3463 * ATA taskfiles, and queues the taskfiles to be sent to
3464 * hardware. In other cases, this function simulates a
3465 * SCSI device by evaluating and responding to certain
3466 * SCSI commands. This creates the overall effect of
3467 * ATA and ATAPI devices appearing as SCSI devices.
3473 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3476 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
3478 struct ata_port *ap;
3479 struct ata_device *dev;
3480 struct scsi_device *scsidev = cmd->device;
3482 unsigned long irq_flags;
3484 ap = ata_shost_to_port(shost);
3486 spin_lock_irqsave(ap->lock, irq_flags);
3488 ata_scsi_dump_cdb(ap, cmd);
3490 dev = ata_scsi_find_dev(ap, scsidev);
3492 rc = __ata_scsi_queuecmd(cmd, dev);
3494 cmd->result = (DID_BAD_TARGET << 16);
3495 cmd->scsi_done(cmd);
3498 spin_unlock_irqrestore(ap->lock, irq_flags);
3504 * ata_scsi_simulate - simulate SCSI command on ATA device
3505 * @dev: the target device
3506 * @cmd: SCSI command being sent to device.
3508 * Interprets and directly executes a select list of SCSI commands
3509 * that can be handled internally.
3512 * spin_lock_irqsave(host lock)
3515 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
3517 struct ata_scsi_args args;
3518 const u8 *scsicmd = cmd->cmnd;
3524 args.done = cmd->scsi_done;
3526 switch(scsicmd[0]) {
3527 /* TODO: worth improving? */
3529 ata_scsi_invalid_field(cmd);
3533 if (scsicmd[1] & 2) /* is CmdDt set? */
3534 ata_scsi_invalid_field(cmd);
3535 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3536 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3537 else switch (scsicmd[2]) {
3539 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
3542 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
3545 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
3548 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3551 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3554 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3557 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
3560 ata_scsi_invalid_field(cmd);
3567 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3571 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3574 case SERVICE_ACTION_IN:
3575 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3576 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3578 ata_scsi_invalid_field(cmd);
3582 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3586 ata_scsi_set_sense(cmd, 0, 0, 0);
3587 cmd->result = (DRIVER_SENSE << 24);
3588 cmd->scsi_done(cmd);
3591 /* if we reach this, then writeback caching is disabled,
3592 * turning this into a no-op.
3594 case SYNCHRONIZE_CACHE:
3597 /* no-op's, complete with success */
3601 case TEST_UNIT_READY:
3602 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3605 case SEND_DIAGNOSTIC:
3606 tmp8 = scsicmd[1] & ~(1 << 3);
3607 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3608 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3610 ata_scsi_invalid_field(cmd);
3613 /* all other commands */
3615 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3616 /* "Invalid command operation code" */
3617 cmd->scsi_done(cmd);
3622 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3626 for (i = 0; i < host->n_ports; i++) {
3627 struct ata_port *ap = host->ports[i];
3628 struct Scsi_Host *shost;
3631 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3635 shost->eh_noresume = 1;
3636 *(struct ata_port **)&shost->hostdata[0] = ap;
3637 ap->scsi_host = shost;
3639 shost->transportt = ata_scsi_transport_template;
3640 shost->unique_id = ap->print_id;
3643 shost->max_channel = 1;
3644 shost->max_cmd_len = 16;
3645 shost->no_write_same = 1;
3647 /* Schedule policy is determined by ->qc_defer()
3648 * callback and it needs to see every deferred qc.
3649 * Set host_blocked to 1 to prevent SCSI midlayer from
3650 * automatically deferring requests.
3652 shost->max_host_blocked = 1;
3654 rc = scsi_add_host_with_dma(ap->scsi_host,
3655 &ap->tdev, ap->host->dev);
3663 scsi_host_put(host->ports[i]->scsi_host);
3666 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3668 scsi_remove_host(shost);
3669 scsi_host_put(shost);
3674 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3677 struct ata_device *last_failed_dev = NULL;
3678 struct ata_link *link;
3679 struct ata_device *dev;
3682 ata_for_each_link(link, ap, EDGE) {
3683 ata_for_each_dev(dev, link, ENABLED) {
3684 struct scsi_device *sdev;
3685 int channel = 0, id = 0;
3690 if (ata_is_host_link(link))
3693 channel = link->pmp;
3695 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3697 if (!IS_ERR(sdev)) {
3699 scsi_device_put(sdev);
3706 /* If we scanned while EH was in progress or allocation
3707 * failure occurred, scan would have failed silently. Check
3708 * whether all devices are attached.
3710 ata_for_each_link(link, ap, EDGE) {
3711 ata_for_each_dev(dev, link, ENABLED) {
3720 /* we're missing some SCSI devices */
3722 /* If caller requested synchrnous scan && we've made
3723 * any progress, sleep briefly and repeat.
3725 if (dev != last_failed_dev) {
3727 last_failed_dev = dev;
3731 /* We might be failing to detect boot device, give it
3732 * a few more chances.
3740 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
3743 queue_delayed_work(system_long_wq, &ap->hotplug_task,
3744 round_jiffies_relative(HZ));
3748 * ata_scsi_offline_dev - offline attached SCSI device
3749 * @dev: ATA device to offline attached SCSI device for
3751 * This function is called from ata_eh_hotplug() and responsible
3752 * for taking the SCSI device attached to @dev offline. This
3753 * function is called with host lock which protects dev->sdev
3757 * spin_lock_irqsave(host lock)
3760 * 1 if attached SCSI device exists, 0 otherwise.
3762 int ata_scsi_offline_dev(struct ata_device *dev)
3765 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3772 * ata_scsi_remove_dev - remove attached SCSI device
3773 * @dev: ATA device to remove attached SCSI device for
3775 * This function is called from ata_eh_scsi_hotplug() and
3776 * responsible for removing the SCSI device attached to @dev.
3779 * Kernel thread context (may sleep).
3781 static void ata_scsi_remove_dev(struct ata_device *dev)
3783 struct ata_port *ap = dev->link->ap;
3784 struct scsi_device *sdev;
3785 unsigned long flags;
3787 /* Alas, we need to grab scan_mutex to ensure SCSI device
3788 * state doesn't change underneath us and thus
3789 * scsi_device_get() always succeeds. The mutex locking can
3790 * be removed if there is __scsi_device_get() interface which
3791 * increments reference counts regardless of device state.
3793 mutex_lock(&ap->scsi_host->scan_mutex);
3794 spin_lock_irqsave(ap->lock, flags);
3796 /* clearing dev->sdev is protected by host lock */
3801 /* If user initiated unplug races with us, sdev can go
3802 * away underneath us after the host lock and
3803 * scan_mutex are released. Hold onto it.
3805 if (scsi_device_get(sdev) == 0) {
3806 /* The following ensures the attached sdev is
3807 * offline on return from ata_scsi_offline_dev()
3808 * regardless it wins or loses the race
3809 * against this function.
3811 scsi_device_set_state(sdev, SDEV_OFFLINE);
3818 spin_unlock_irqrestore(ap->lock, flags);
3819 mutex_unlock(&ap->scsi_host->scan_mutex);
3822 ata_dev_info(dev, "detaching (SCSI %s)\n",
3823 dev_name(&sdev->sdev_gendev));
3825 scsi_remove_device(sdev);
3826 scsi_device_put(sdev);
3830 static void ata_scsi_handle_link_detach(struct ata_link *link)
3832 struct ata_port *ap = link->ap;
3833 struct ata_device *dev;
3835 ata_for_each_dev(dev, link, ALL) {
3836 unsigned long flags;
3838 if (!(dev->flags & ATA_DFLAG_DETACHED))
3841 spin_lock_irqsave(ap->lock, flags);
3842 dev->flags &= ~ATA_DFLAG_DETACHED;
3843 spin_unlock_irqrestore(ap->lock, flags);
3845 if (zpodd_dev_enabled(dev))
3848 ata_scsi_remove_dev(dev);
3853 * ata_scsi_media_change_notify - send media change event
3854 * @dev: Pointer to the disk device with media change event
3856 * Tell the block layer to send a media change notification
3860 * spin_lock_irqsave(host lock)
3862 void ata_scsi_media_change_notify(struct ata_device *dev)
3865 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3870 * ata_scsi_hotplug - SCSI part of hotplug
3871 * @work: Pointer to ATA port to perform SCSI hotplug on
3873 * Perform SCSI part of hotplug. It's executed from a separate
3874 * workqueue after EH completes. This is necessary because SCSI
3875 * hot plugging requires working EH and hot unplugging is
3876 * synchronized with hot plugging with a mutex.
3879 * Kernel thread context (may sleep).
3881 void ata_scsi_hotplug(struct work_struct *work)
3883 struct ata_port *ap =
3884 container_of(work, struct ata_port, hotplug_task.work);
3887 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3888 DPRINTK("ENTER/EXIT - unloading\n");
3895 * The block layer suspend/resume path is fundamentally broken due
3896 * to freezable kthreads and workqueue and may deadlock if a block
3897 * device gets removed while resume is in progress. I don't know
3898 * what the solution is short of removing freezable kthreads and
3899 * workqueues altogether.
3901 * The following is an ugly hack to avoid kicking off device
3902 * removal while freezer is active. This is a joke but does avoid
3903 * this particular deadlock scenario.
3905 * https://bugzilla.kernel.org/show_bug.cgi?id=62801
3906 * http://marc.info/?l=linux-kernel&m=138695698516487
3908 #ifdef CONFIG_FREEZER
3914 mutex_lock(&ap->scsi_scan_mutex);
3916 /* Unplug detached devices. We cannot use link iterator here
3917 * because PMP links have to be scanned even if PMP is
3918 * currently not attached. Iterate manually.
3920 ata_scsi_handle_link_detach(&ap->link);
3922 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3923 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3925 /* scan for new ones */
3926 ata_scsi_scan_host(ap, 0);
3928 mutex_unlock(&ap->scsi_scan_mutex);
3933 * ata_scsi_user_scan - indication for user-initiated bus scan
3934 * @shost: SCSI host to scan
3935 * @channel: Channel to scan
3939 * This function is called when user explicitly requests bus
3940 * scan. Set probe pending flag and invoke EH.
3943 * SCSI layer (we don't care)
3948 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3949 unsigned int id, u64 lun)
3951 struct ata_port *ap = ata_shost_to_port(shost);
3952 unsigned long flags;
3955 if (!ap->ops->error_handler)
3958 if (lun != SCAN_WILD_CARD && lun)
3961 if (!sata_pmp_attached(ap)) {
3962 if (channel != SCAN_WILD_CARD && channel)
3966 if (id != SCAN_WILD_CARD && id)
3971 spin_lock_irqsave(ap->lock, flags);
3973 if (devno == SCAN_WILD_CARD) {
3974 struct ata_link *link;
3976 ata_for_each_link(link, ap, EDGE) {
3977 struct ata_eh_info *ehi = &link->eh_info;
3978 ehi->probe_mask |= ATA_ALL_DEVICES;
3979 ehi->action |= ATA_EH_RESET;
3982 struct ata_device *dev = ata_find_dev(ap, devno);
3985 struct ata_eh_info *ehi = &dev->link->eh_info;
3986 ehi->probe_mask |= 1 << dev->devno;
3987 ehi->action |= ATA_EH_RESET;
3993 ata_port_schedule_eh(ap);
3994 spin_unlock_irqrestore(ap->lock, flags);
3995 ata_port_wait_eh(ap);
3997 spin_unlock_irqrestore(ap->lock, flags);
4003 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4004 * @work: Pointer to ATA port to perform scsi_rescan_device()
4006 * After ATA pass thru (SAT) commands are executed successfully,
4007 * libata need to propagate the changes to SCSI layer.
4010 * Kernel thread context (may sleep).
4012 void ata_scsi_dev_rescan(struct work_struct *work)
4014 struct ata_port *ap =
4015 container_of(work, struct ata_port, scsi_rescan_task);
4016 struct ata_link *link;
4017 struct ata_device *dev;
4018 unsigned long flags;
4020 mutex_lock(&ap->scsi_scan_mutex);
4021 spin_lock_irqsave(ap->lock, flags);
4023 ata_for_each_link(link, ap, EDGE) {
4024 ata_for_each_dev(dev, link, ENABLED) {
4025 struct scsi_device *sdev = dev->sdev;
4029 if (scsi_device_get(sdev))
4032 spin_unlock_irqrestore(ap->lock, flags);
4033 scsi_rescan_device(&(sdev->sdev_gendev));
4034 scsi_device_put(sdev);
4035 spin_lock_irqsave(ap->lock, flags);
4039 spin_unlock_irqrestore(ap->lock, flags);
4040 mutex_unlock(&ap->scsi_scan_mutex);
4044 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4045 * @host: ATA host container for all SAS ports
4046 * @port_info: Information from low-level host driver
4047 * @shost: SCSI host that the scsi device is attached to
4050 * PCI/etc. bus probe sem.
4053 * ata_port pointer on success / NULL on failure.
4056 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
4057 struct ata_port_info *port_info,
4058 struct Scsi_Host *shost)
4060 struct ata_port *ap;
4062 ap = ata_port_alloc(host);
4067 ap->lock = &host->lock;
4068 ap->pio_mask = port_info->pio_mask;
4069 ap->mwdma_mask = port_info->mwdma_mask;
4070 ap->udma_mask = port_info->udma_mask;
4071 ap->flags |= port_info->flags;
4072 ap->ops = port_info->port_ops;
4073 ap->cbl = ATA_CBL_SATA;
4077 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
4080 * ata_sas_port_start - Set port up for dma.
4081 * @ap: Port to initialize
4083 * Called just after data structures for each port are
4086 * May be used as the port_start() entry in ata_port_operations.
4089 * Inherited from caller.
4091 int ata_sas_port_start(struct ata_port *ap)
4094 * the port is marked as frozen at allocation time, but if we don't
4095 * have new eh, we won't thaw it
4097 if (!ap->ops->error_handler)
4098 ap->pflags &= ~ATA_PFLAG_FROZEN;
4101 EXPORT_SYMBOL_GPL(ata_sas_port_start);
4104 * ata_port_stop - Undo ata_sas_port_start()
4105 * @ap: Port to shut down
4107 * May be used as the port_stop() entry in ata_port_operations.
4110 * Inherited from caller.
4113 void ata_sas_port_stop(struct ata_port *ap)
4116 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
4119 * ata_sas_async_probe - simply schedule probing and return
4120 * @ap: Port to probe
4122 * For batch scheduling of probe for sas attached ata devices, assumes
4123 * the port has already been through ata_sas_port_init()
4125 void ata_sas_async_probe(struct ata_port *ap)
4127 __ata_port_probe(ap);
4129 EXPORT_SYMBOL_GPL(ata_sas_async_probe);
4131 int ata_sas_sync_probe(struct ata_port *ap)
4133 return ata_port_probe(ap);
4135 EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
4139 * ata_sas_port_init - Initialize a SATA device
4140 * @ap: SATA port to initialize
4143 * PCI/etc. bus probe sem.
4146 * Zero on success, non-zero on error.
4149 int ata_sas_port_init(struct ata_port *ap)
4151 int rc = ap->ops->port_start(ap);
4155 ap->print_id = atomic_inc_return(&ata_print_id);
4158 EXPORT_SYMBOL_GPL(ata_sas_port_init);
4161 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
4162 * @ap: SATA port to destroy
4166 void ata_sas_port_destroy(struct ata_port *ap)
4168 if (ap->ops->port_stop)
4169 ap->ops->port_stop(ap);
4172 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
4175 * ata_sas_slave_configure - Default slave_config routine for libata devices
4176 * @sdev: SCSI device to configure
4177 * @ap: ATA port to which SCSI device is attached
4183 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
4185 ata_scsi_sdev_config(sdev);
4186 ata_scsi_dev_config(sdev, ap->link.device);
4189 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
4192 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
4193 * @cmd: SCSI command to be sent
4194 * @ap: ATA port to which the command is being sent
4197 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4201 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
4205 ata_scsi_dump_cdb(ap, cmd);
4207 if (likely(ata_dev_enabled(ap->link.device)))
4208 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
4210 cmd->result = (DID_BAD_TARGET << 16);
4211 cmd->scsi_done(cmd);
4215 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);