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, cmd->request->tag);
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_change_queue_depth(sdev, 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
1248 * libsas and libata have different approaches for associating a sdev to
1252 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1255 struct ata_device *dev;
1256 unsigned long flags;
1258 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1259 return sdev->queue_depth;
1261 dev = ata_scsi_find_dev(ap, sdev);
1262 if (!dev || !ata_dev_enabled(dev))
1263 return sdev->queue_depth;
1266 spin_lock_irqsave(ap->lock, flags);
1267 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1268 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1269 dev->flags |= ATA_DFLAG_NCQ_OFF;
1272 spin_unlock_irqrestore(ap->lock, flags);
1274 /* limit and apply queue depth */
1275 queue_depth = min(queue_depth, sdev->host->can_queue);
1276 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1277 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1279 if (sdev->queue_depth == queue_depth)
1282 return scsi_change_queue_depth(sdev, queue_depth);
1286 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1287 * @sdev: SCSI device to configure queue depth for
1288 * @queue_depth: new queue depth
1290 * This is libata standard hostt->change_queue_depth callback.
1291 * SCSI will call into this callback when user tries to set queue
1295 * SCSI layer (we don't care)
1298 * Newly configured queue depth.
1300 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1302 struct ata_port *ap = ata_shost_to_port(sdev->host);
1304 return __ata_change_queue_depth(ap, sdev, queue_depth);
1308 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1309 * @qc: Storage for translated ATA taskfile
1311 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1312 * (to start). Perhaps these commands should be preceded by
1313 * CHECK POWER MODE to see what power mode the device is already in.
1314 * [See SAT revision 5 at www.t10.org]
1317 * spin_lock_irqsave(host lock)
1320 * Zero on success, non-zero on error.
1322 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1324 struct scsi_cmnd *scmd = qc->scsicmd;
1325 struct ata_taskfile *tf = &qc->tf;
1326 const u8 *cdb = scmd->cmnd;
1328 if (scmd->cmd_len < 5)
1331 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1332 tf->protocol = ATA_PROT_NODATA;
1334 ; /* ignore IMMED bit, violates sat-r05 */
1337 goto invalid_fld; /* LOEJ bit set not supported */
1338 if (((cdb[4] >> 4) & 0xf) != 0)
1339 goto invalid_fld; /* power conditions not supported */
1342 tf->nsect = 1; /* 1 sector, lba=0 */
1344 if (qc->dev->flags & ATA_DFLAG_LBA) {
1345 tf->flags |= ATA_TFLAG_LBA;
1350 tf->device |= ATA_LBA;
1353 tf->lbal = 0x1; /* sect */
1354 tf->lbam = 0x0; /* cyl low */
1355 tf->lbah = 0x0; /* cyl high */
1358 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1360 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1361 * or S5) causing some drives to spin up and down again.
1363 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1364 system_state == SYSTEM_POWER_OFF)
1367 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1368 system_entering_hibernation())
1371 /* Issue ATA STANDBY IMMEDIATE command */
1372 tf->command = ATA_CMD_STANDBYNOW1;
1376 * Standby and Idle condition timers could be implemented but that
1377 * would require libata to implement the Power condition mode page
1378 * and allow the user to change it. Changing mode pages requires
1379 * MODE SELECT to be implemented.
1385 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1386 /* "Invalid field in cbd" */
1389 scmd->result = SAM_STAT_GOOD;
1395 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1396 * @qc: Storage for translated ATA taskfile
1398 * Sets up an ATA taskfile to issue FLUSH CACHE or
1402 * spin_lock_irqsave(host lock)
1405 * Zero on success, non-zero on error.
1407 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1409 struct ata_taskfile *tf = &qc->tf;
1411 tf->flags |= ATA_TFLAG_DEVICE;
1412 tf->protocol = ATA_PROT_NODATA;
1414 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1415 tf->command = ATA_CMD_FLUSH_EXT;
1417 tf->command = ATA_CMD_FLUSH;
1419 /* flush is critical for IO integrity, consider it an IO command */
1420 qc->flags |= ATA_QCFLAG_IO;
1426 * scsi_6_lba_len - Get LBA and transfer length
1427 * @cdb: SCSI command to translate
1429 * Calculate LBA and transfer length for 6-byte commands.
1433 * @plen: the transfer length
1435 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1440 VPRINTK("six-byte command\n");
1442 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1443 lba |= ((u64)cdb[2]) << 8;
1444 lba |= ((u64)cdb[3]);
1453 * scsi_10_lba_len - Get LBA and transfer length
1454 * @cdb: SCSI command to translate
1456 * Calculate LBA and transfer length for 10-byte commands.
1460 * @plen: the transfer length
1462 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1467 VPRINTK("ten-byte command\n");
1469 lba |= ((u64)cdb[2]) << 24;
1470 lba |= ((u64)cdb[3]) << 16;
1471 lba |= ((u64)cdb[4]) << 8;
1472 lba |= ((u64)cdb[5]);
1474 len |= ((u32)cdb[7]) << 8;
1475 len |= ((u32)cdb[8]);
1482 * scsi_16_lba_len - Get LBA and transfer length
1483 * @cdb: SCSI command to translate
1485 * Calculate LBA and transfer length for 16-byte commands.
1489 * @plen: the transfer length
1491 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1496 VPRINTK("sixteen-byte command\n");
1498 lba |= ((u64)cdb[2]) << 56;
1499 lba |= ((u64)cdb[3]) << 48;
1500 lba |= ((u64)cdb[4]) << 40;
1501 lba |= ((u64)cdb[5]) << 32;
1502 lba |= ((u64)cdb[6]) << 24;
1503 lba |= ((u64)cdb[7]) << 16;
1504 lba |= ((u64)cdb[8]) << 8;
1505 lba |= ((u64)cdb[9]);
1507 len |= ((u32)cdb[10]) << 24;
1508 len |= ((u32)cdb[11]) << 16;
1509 len |= ((u32)cdb[12]) << 8;
1510 len |= ((u32)cdb[13]);
1517 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1518 * @qc: Storage for translated ATA taskfile
1520 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1523 * spin_lock_irqsave(host lock)
1526 * Zero on success, non-zero on error.
1528 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1530 struct scsi_cmnd *scmd = qc->scsicmd;
1531 struct ata_taskfile *tf = &qc->tf;
1532 struct ata_device *dev = qc->dev;
1533 u64 dev_sectors = qc->dev->n_sectors;
1534 const u8 *cdb = scmd->cmnd;
1538 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1539 tf->protocol = ATA_PROT_NODATA;
1541 if (cdb[0] == VERIFY) {
1542 if (scmd->cmd_len < 10)
1544 scsi_10_lba_len(cdb, &block, &n_block);
1545 } else if (cdb[0] == VERIFY_16) {
1546 if (scmd->cmd_len < 16)
1548 scsi_16_lba_len(cdb, &block, &n_block);
1554 if (block >= dev_sectors)
1556 if ((block + n_block) > dev_sectors)
1559 if (dev->flags & ATA_DFLAG_LBA) {
1560 tf->flags |= ATA_TFLAG_LBA;
1562 if (lba_28_ok(block, n_block)) {
1564 tf->command = ATA_CMD_VERIFY;
1565 tf->device |= (block >> 24) & 0xf;
1566 } else if (lba_48_ok(block, n_block)) {
1567 if (!(dev->flags & ATA_DFLAG_LBA48))
1571 tf->flags |= ATA_TFLAG_LBA48;
1572 tf->command = ATA_CMD_VERIFY_EXT;
1574 tf->hob_nsect = (n_block >> 8) & 0xff;
1576 tf->hob_lbah = (block >> 40) & 0xff;
1577 tf->hob_lbam = (block >> 32) & 0xff;
1578 tf->hob_lbal = (block >> 24) & 0xff;
1580 /* request too large even for LBA48 */
1583 tf->nsect = n_block & 0xff;
1585 tf->lbah = (block >> 16) & 0xff;
1586 tf->lbam = (block >> 8) & 0xff;
1587 tf->lbal = block & 0xff;
1589 tf->device |= ATA_LBA;
1592 u32 sect, head, cyl, track;
1594 if (!lba_28_ok(block, n_block))
1597 /* Convert LBA to CHS */
1598 track = (u32)block / dev->sectors;
1599 cyl = track / dev->heads;
1600 head = track % dev->heads;
1601 sect = (u32)block % dev->sectors + 1;
1603 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1604 (u32)block, track, cyl, head, sect);
1606 /* Check whether the converted CHS can fit.
1610 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1613 tf->command = ATA_CMD_VERIFY;
1614 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1617 tf->lbah = cyl >> 8;
1624 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1625 /* "Invalid field in cbd" */
1629 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1630 /* "Logical Block Address out of range" */
1634 scmd->result = SAM_STAT_GOOD;
1639 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1640 * @qc: Storage for translated ATA taskfile
1642 * Converts any of six SCSI read/write commands into the
1643 * ATA counterpart, including starting sector (LBA),
1644 * sector count, and taking into account the device's LBA48
1647 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1648 * %WRITE_16 are currently supported.
1651 * spin_lock_irqsave(host lock)
1654 * Zero on success, non-zero on error.
1656 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1658 struct scsi_cmnd *scmd = qc->scsicmd;
1659 const u8 *cdb = scmd->cmnd;
1660 unsigned int tf_flags = 0;
1665 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1666 tf_flags |= ATA_TFLAG_WRITE;
1668 /* Calculate the SCSI LBA, transfer length and FUA. */
1672 if (unlikely(scmd->cmd_len < 10))
1674 scsi_10_lba_len(cdb, &block, &n_block);
1675 if (cdb[1] & (1 << 3))
1676 tf_flags |= ATA_TFLAG_FUA;
1680 if (unlikely(scmd->cmd_len < 6))
1682 scsi_6_lba_len(cdb, &block, &n_block);
1684 /* for 6-byte r/w commands, transfer length 0
1685 * means 256 blocks of data, not 0 block.
1692 if (unlikely(scmd->cmd_len < 16))
1694 scsi_16_lba_len(cdb, &block, &n_block);
1695 if (cdb[1] & (1 << 3))
1696 tf_flags |= ATA_TFLAG_FUA;
1699 DPRINTK("no-byte command\n");
1703 /* Check and compose ATA command */
1705 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1706 * length 0 means transfer 0 block of data.
1707 * However, for ATA R/W commands, sector count 0 means
1708 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1710 * WARNING: one or two older ATA drives treat 0 as 0...
1714 qc->flags |= ATA_QCFLAG_IO;
1715 qc->nbytes = n_block * scmd->device->sector_size;
1717 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1719 if (likely(rc == 0))
1724 /* treat all other errors as -EINVAL, fall through */
1726 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1727 /* "Invalid field in cbd" */
1731 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1732 /* "Logical Block Address out of range" */
1736 scmd->result = SAM_STAT_GOOD;
1740 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1742 struct ata_port *ap = qc->ap;
1743 struct scsi_cmnd *cmd = qc->scsicmd;
1744 u8 *cdb = cmd->cmnd;
1745 int need_sense = (qc->err_mask != 0);
1747 /* For ATA pass thru (SAT) commands, generate a sense block if
1748 * user mandated it or if there's an error. Note that if we
1749 * generate because the user forced us to [CK_COND =1], a check
1750 * condition is generated and the ATA register values are returned
1751 * whether the command completed successfully or not. If there
1752 * was no error, we use the following sense data:
1753 * sk = RECOVERED ERROR
1754 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1756 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1757 ((cdb[2] & 0x20) || need_sense)) {
1758 ata_gen_passthru_sense(qc);
1761 cmd->result = SAM_STAT_GOOD;
1763 /* TODO: decide which descriptor format to use
1764 * for 48b LBA devices and call that here
1765 * instead of the fixed desc, which is only
1766 * good for smaller LBA (and maybe CHS?)
1769 ata_gen_ata_sense(qc);
1773 if (need_sense && !ap->ops->error_handler)
1774 ata_dump_status(ap->print_id, &qc->result_tf);
1782 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1783 * @dev: ATA device to which the command is addressed
1784 * @cmd: SCSI command to execute
1785 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1787 * Our ->queuecommand() function has decided that the SCSI
1788 * command issued can be directly translated into an ATA
1789 * command, rather than handled internally.
1791 * This function sets up an ata_queued_cmd structure for the
1792 * SCSI command, and sends that ata_queued_cmd to the hardware.
1794 * The xlat_func argument (actor) returns 0 if ready to execute
1795 * ATA command, else 1 to finish translation. If 1 is returned
1796 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1797 * to be set reflecting an error condition or clean (early)
1801 * spin_lock_irqsave(host lock)
1804 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1805 * needs to be deferred.
1807 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1808 ata_xlat_func_t xlat_func)
1810 struct ata_port *ap = dev->link->ap;
1811 struct ata_queued_cmd *qc;
1816 qc = ata_scsi_qc_new(dev, cmd);
1820 /* data is present; dma-map it */
1821 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1822 cmd->sc_data_direction == DMA_TO_DEVICE) {
1823 if (unlikely(scsi_bufflen(cmd) < 1)) {
1824 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
1828 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1830 qc->dma_dir = cmd->sc_data_direction;
1833 qc->complete_fn = ata_scsi_qc_complete;
1838 if (ap->ops->qc_defer) {
1839 if ((rc = ap->ops->qc_defer(qc)))
1843 /* select device, send command to hardware */
1851 cmd->scsi_done(cmd);
1852 DPRINTK("EXIT - early finish (good or error)\n");
1857 cmd->result = (DID_ERROR << 16);
1858 cmd->scsi_done(cmd);
1860 DPRINTK("EXIT - internal\n");
1865 DPRINTK("EXIT - defer\n");
1866 if (rc == ATA_DEFER_LINK)
1867 return SCSI_MLQUEUE_DEVICE_BUSY;
1869 return SCSI_MLQUEUE_HOST_BUSY;
1873 * ata_scsi_rbuf_get - Map response buffer.
1874 * @cmd: SCSI command containing buffer to be mapped.
1875 * @flags: unsigned long variable to store irq enable status
1876 * @copy_in: copy in from user buffer
1878 * Prepare buffer for simulated SCSI commands.
1881 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1884 * Pointer to response buffer.
1886 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1887 unsigned long *flags)
1889 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1891 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1893 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1894 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1895 return ata_scsi_rbuf;
1899 * ata_scsi_rbuf_put - Unmap response buffer.
1900 * @cmd: SCSI command containing buffer to be unmapped.
1901 * @copy_out: copy out result
1902 * @flags: @flags passed to ata_scsi_rbuf_get()
1904 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1905 * @copy_back is true.
1908 * Unlocks ata_scsi_rbuf_lock.
1910 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1911 unsigned long *flags)
1914 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1915 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1916 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1920 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1921 * @args: device IDENTIFY data / SCSI command of interest.
1922 * @actor: Callback hook for desired SCSI command simulator
1924 * Takes care of the hard work of simulating a SCSI command...
1925 * Mapping the response buffer, calling the command's handler,
1926 * and handling the handler's return value. This return value
1927 * indicates whether the handler wishes the SCSI command to be
1928 * completed successfully (0), or not (in which case cmd->result
1929 * and sense buffer are assumed to be set).
1932 * spin_lock_irqsave(host lock)
1934 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1935 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1939 struct scsi_cmnd *cmd = args->cmd;
1940 unsigned long flags;
1942 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1943 rc = actor(args, rbuf);
1944 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
1947 cmd->result = SAM_STAT_GOOD;
1952 * ata_scsiop_inq_std - Simulate INQUIRY command
1953 * @args: device IDENTIFY data / SCSI command of interest.
1954 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1956 * Returns standard device identification data associated
1957 * with non-VPD INQUIRY command output.
1960 * spin_lock_irqsave(host lock)
1962 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1964 const u8 versions[] = {
1966 0x60, /* SAM-3 (no version claimed) */
1969 0x20, /* SBC-2 (no version claimed) */
1972 0x60 /* SPC-3 (no version claimed) */
1974 const u8 versions_zbc[] = {
1976 0xA0, /* SAM-5 (no version claimed) */
1979 0xC0, /* SBC-3 (no version claimed) */
1982 0x60, /* SPC-4 (no version claimed) */
1985 0x20, /* ZBC (no version claimed) */
1991 0x5, /* claim SPC-3 version compatibility */
1998 /* set scsi removable (RMB) bit per ata bit */
1999 if (ata_id_removable(args->id))
2002 if (args->dev->class == ATA_DEV_ZAC) {
2004 hdr[2] = 0x6; /* ZBC is defined in SPC-4 */
2007 memcpy(rbuf, hdr, sizeof(hdr));
2008 memcpy(&rbuf[8], "ATA ", 8);
2009 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
2011 /* From SAT, use last 2 words from fw rev unless they are spaces */
2012 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
2013 if (strncmp(&rbuf[32], " ", 4) == 0)
2014 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2016 if (rbuf[32] == 0 || rbuf[32] == ' ')
2017 memcpy(&rbuf[32], "n/a ", 4);
2019 if (args->dev->class == ATA_DEV_ZAC)
2020 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc));
2022 memcpy(rbuf + 58, versions, sizeof(versions));
2028 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2029 * @args: device IDENTIFY data / SCSI command of interest.
2030 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2032 * Returns list of inquiry VPD pages available.
2035 * spin_lock_irqsave(host lock)
2037 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
2039 const u8 pages[] = {
2040 0x00, /* page 0x00, this page */
2041 0x80, /* page 0x80, unit serial no page */
2042 0x83, /* page 0x83, device ident page */
2043 0x89, /* page 0x89, ata info page */
2044 0xb0, /* page 0xb0, block limits page */
2045 0xb1, /* page 0xb1, block device characteristics page */
2046 0xb2, /* page 0xb2, thin provisioning page */
2049 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
2050 memcpy(rbuf + 4, pages, sizeof(pages));
2055 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2056 * @args: device IDENTIFY data / SCSI command of interest.
2057 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2059 * Returns ATA device serial number.
2062 * spin_lock_irqsave(host lock)
2064 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2068 0x80, /* this page code */
2070 ATA_ID_SERNO_LEN, /* page len */
2073 memcpy(rbuf, hdr, sizeof(hdr));
2074 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2075 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2080 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2081 * @args: device IDENTIFY data / SCSI command of interest.
2082 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2084 * Yields two logical unit device identification designators:
2085 * - vendor specific ASCII containing the ATA serial number
2086 * - SAT defined "t10 vendor id based" containing ASCII vendor
2087 * name ("ATA "), model and serial numbers.
2090 * spin_lock_irqsave(host lock)
2092 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2094 const int sat_model_serial_desc_len = 68;
2097 rbuf[1] = 0x83; /* this page code */
2100 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2102 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2104 ata_id_string(args->id, (unsigned char *) rbuf + num,
2105 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2106 num += ATA_ID_SERNO_LEN;
2108 /* SAT defined lu model and serial numbers descriptor */
2109 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2112 rbuf[num + 3] = sat_model_serial_desc_len;
2114 memcpy(rbuf + num, "ATA ", 8);
2116 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2118 num += ATA_ID_PROD_LEN;
2119 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2121 num += ATA_ID_SERNO_LEN;
2123 if (ata_id_has_wwn(args->id)) {
2124 /* SAT defined lu world wide name */
2125 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2128 rbuf[num + 3] = ATA_ID_WWN_LEN;
2130 ata_id_string(args->id, (unsigned char *) rbuf + num,
2131 ATA_ID_WWN, ATA_ID_WWN_LEN);
2132 num += ATA_ID_WWN_LEN;
2134 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2139 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2140 * @args: device IDENTIFY data / SCSI command of interest.
2141 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2143 * Yields SAT-specified ATA VPD page.
2146 * spin_lock_irqsave(host lock)
2148 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2150 struct ata_taskfile tf;
2152 memset(&tf, 0, sizeof(tf));
2154 rbuf[1] = 0x89; /* our page code */
2155 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2156 rbuf[3] = (0x238 & 0xff);
2158 memcpy(&rbuf[8], "linux ", 8);
2159 memcpy(&rbuf[16], "libata ", 16);
2160 memcpy(&rbuf[32], DRV_VERSION, 4);
2162 /* we don't store the ATA device signature, so we fake it */
2164 tf.command = ATA_DRDY; /* really, this is Status reg */
2168 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2169 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2171 rbuf[56] = ATA_CMD_ID_ATA;
2173 memcpy(&rbuf[60], &args->id[0], 512);
2177 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2182 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2185 * Optimal transfer length granularity.
2187 * This is always one physical block, but for disks with a smaller
2188 * logical than physical sector size we need to figure out what the
2191 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2192 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2195 * Optimal unmap granularity.
2197 * The ATA spec doesn't even know about a granularity or alignment
2198 * for the TRIM command. We can leave away most of the unmap related
2199 * VPD page entries, but we have specifify a granularity to signal
2200 * that we support some form of unmap - in thise case via WRITE SAME
2201 * with the unmap bit set.
2203 if (ata_id_has_trim(args->id)) {
2204 put_unaligned_be64(65535 * 512 / 8, &rbuf[36]);
2205 put_unaligned_be32(1, &rbuf[28]);
2211 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2213 int form_factor = ata_id_form_factor(args->id);
2214 int media_rotation_rate = ata_id_rotation_rate(args->id);
2218 rbuf[4] = media_rotation_rate >> 8;
2219 rbuf[5] = media_rotation_rate;
2220 rbuf[7] = form_factor;
2225 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2227 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2230 rbuf[5] = 1 << 6; /* TPWS */
2236 * ata_scsiop_noop - Command handler that simply returns success.
2237 * @args: device IDENTIFY data / SCSI command of interest.
2238 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2240 * No operation. Simply returns success to caller, to indicate
2241 * that the caller should successfully complete this SCSI command.
2244 * spin_lock_irqsave(host lock)
2246 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
2253 * modecpy - Prepare response for MODE SENSE
2254 * @dest: output buffer
2255 * @src: data being copied
2256 * @n: length of mode page
2257 * @changeable: whether changeable parameters are requested
2259 * Generate a generic MODE SENSE page for either current or changeable
2265 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2268 memcpy(dest, src, 2);
2269 memset(dest + 2, 0, n - 2);
2271 memcpy(dest, src, n);
2276 * ata_msense_caching - Simulate MODE SENSE caching info page
2277 * @id: device IDENTIFY data
2278 * @buf: output buffer
2279 * @changeable: whether changeable parameters are requested
2281 * Generate a caching info page, which conditionally indicates
2282 * write caching to the SCSI layer, depending on device
2288 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2290 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2291 if (changeable || ata_id_wcache_enabled(id))
2292 buf[2] |= (1 << 2); /* write cache enable */
2293 if (!changeable && !ata_id_rahead_enabled(id))
2294 buf[12] |= (1 << 5); /* disable read ahead */
2295 return sizeof(def_cache_mpage);
2299 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2300 * @buf: output buffer
2301 * @changeable: whether changeable parameters are requested
2303 * Generate a generic MODE SENSE control mode page.
2308 static unsigned int ata_msense_ctl_mode(u8 *buf, bool changeable)
2310 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2311 return sizeof(def_control_mpage);
2315 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2316 * @buf: output buffer
2317 * @changeable: whether changeable parameters are requested
2319 * Generate a generic MODE SENSE r/w error recovery page.
2324 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2326 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2328 return sizeof(def_rw_recovery_mpage);
2332 * We can turn this into a real blacklist if it's needed, for now just
2333 * blacklist any Maxtor BANC1G10 revision firmware
2335 static int ata_dev_supports_fua(u16 *id)
2337 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2341 if (!ata_id_has_fua(id))
2344 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2345 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2347 if (strcmp(model, "Maxtor"))
2349 if (strcmp(fw, "BANC1G10"))
2352 return 0; /* blacklisted */
2356 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2357 * @args: device IDENTIFY data / SCSI command of interest.
2358 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2360 * Simulate MODE SENSE commands. Assume this is invoked for direct
2361 * access devices (e.g. disks) only. There should be no block
2362 * descriptor for other device types.
2365 * spin_lock_irqsave(host lock)
2367 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2369 struct ata_device *dev = args->dev;
2370 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2371 const u8 sat_blk_desc[] = {
2372 0, 0, 0, 0, /* number of blocks: sat unspecified */
2374 0, 0x2, 0x0 /* block length: 512 bytes */
2377 unsigned int ebd, page_control, six_byte;
2382 six_byte = (scsicmd[0] == MODE_SENSE);
2383 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2385 * LLBA bit in msense(10) ignored (compliant)
2388 page_control = scsicmd[2] >> 6;
2389 switch (page_control) {
2390 case 0: /* current */
2391 case 1: /* changeable */
2392 case 2: /* defaults */
2393 break; /* supported */
2395 goto saving_not_supp;
2401 p += 4 + (ebd ? 8 : 0);
2403 p += 8 + (ebd ? 8 : 0);
2405 pg = scsicmd[2] & 0x3f;
2408 * No mode subpages supported (yet) but asking for _all_
2409 * subpages may be valid
2411 if (spg && (spg != ALL_SUB_MPAGES))
2415 case RW_RECOVERY_MPAGE:
2416 p += ata_msense_rw_recovery(p, page_control == 1);
2420 p += ata_msense_caching(args->id, p, page_control == 1);
2424 p += ata_msense_ctl_mode(p, page_control == 1);
2428 p += ata_msense_rw_recovery(p, page_control == 1);
2429 p += ata_msense_caching(args->id, p, page_control == 1);
2430 p += ata_msense_ctl_mode(p, page_control == 1);
2433 default: /* invalid page code */
2438 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2439 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2443 rbuf[0] = p - rbuf - 1;
2446 rbuf[3] = sizeof(sat_blk_desc);
2447 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2450 unsigned int output_len = p - rbuf - 2;
2452 rbuf[0] = output_len >> 8;
2453 rbuf[1] = output_len;
2456 rbuf[7] = sizeof(sat_blk_desc);
2457 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2463 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2464 /* "Invalid field in cbd" */
2468 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2469 /* "Saving parameters not supported" */
2474 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2475 * @args: device IDENTIFY data / SCSI command of interest.
2476 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2478 * Simulate READ CAPACITY commands.
2483 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2485 struct ata_device *dev = args->dev;
2486 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2487 u32 sector_size; /* physical sector size in bytes */
2491 sector_size = ata_id_logical_sector_size(dev->id);
2492 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2493 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2497 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2498 if (last_lba >= 0xffffffffULL)
2499 last_lba = 0xffffffff;
2501 /* sector count, 32-bit */
2502 rbuf[0] = last_lba >> (8 * 3);
2503 rbuf[1] = last_lba >> (8 * 2);
2504 rbuf[2] = last_lba >> (8 * 1);
2508 rbuf[4] = sector_size >> (8 * 3);
2509 rbuf[5] = sector_size >> (8 * 2);
2510 rbuf[6] = sector_size >> (8 * 1);
2511 rbuf[7] = sector_size;
2513 /* sector count, 64-bit */
2514 rbuf[0] = last_lba >> (8 * 7);
2515 rbuf[1] = last_lba >> (8 * 6);
2516 rbuf[2] = last_lba >> (8 * 5);
2517 rbuf[3] = last_lba >> (8 * 4);
2518 rbuf[4] = last_lba >> (8 * 3);
2519 rbuf[5] = last_lba >> (8 * 2);
2520 rbuf[6] = last_lba >> (8 * 1);
2524 rbuf[ 8] = sector_size >> (8 * 3);
2525 rbuf[ 9] = sector_size >> (8 * 2);
2526 rbuf[10] = sector_size >> (8 * 1);
2527 rbuf[11] = sector_size;
2530 rbuf[13] = log2_per_phys;
2531 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2532 rbuf[15] = lowest_aligned;
2534 if (ata_id_has_trim(args->id)) {
2535 rbuf[14] |= 0x80; /* LBPME */
2537 if (ata_id_has_zero_after_trim(args->id) &&
2538 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) {
2539 ata_dev_info(dev, "Enabling discard_zeroes_data\n");
2540 rbuf[14] |= 0x40; /* LBPRZ */
2548 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2549 * @args: device IDENTIFY data / SCSI command of interest.
2550 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2552 * Simulate REPORT LUNS command.
2555 * spin_lock_irqsave(host lock)
2557 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2560 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2565 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2567 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2568 /* FIXME: not quite right; we don't want the
2569 * translation of taskfile registers into
2570 * a sense descriptors, since that's only
2571 * correct for ATA, not ATAPI
2573 ata_gen_passthru_sense(qc);
2576 qc->scsidone(qc->scsicmd);
2580 /* is it pointless to prefer PIO for "safety reasons"? */
2581 static inline int ata_pio_use_silly(struct ata_port *ap)
2583 return (ap->flags & ATA_FLAG_PIO_DMA);
2586 static void atapi_request_sense(struct ata_queued_cmd *qc)
2588 struct ata_port *ap = qc->ap;
2589 struct scsi_cmnd *cmd = qc->scsicmd;
2591 DPRINTK("ATAPI request sense\n");
2593 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2595 #ifdef CONFIG_ATA_SFF
2596 if (ap->ops->sff_tf_read)
2597 ap->ops->sff_tf_read(ap, &qc->tf);
2600 /* fill these in, for the case where they are -not- overwritten */
2601 cmd->sense_buffer[0] = 0x70;
2602 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2606 /* setup sg table and init transfer direction */
2607 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2608 ata_sg_init(qc, &qc->sgent, 1);
2609 qc->dma_dir = DMA_FROM_DEVICE;
2611 memset(&qc->cdb, 0, qc->dev->cdb_len);
2612 qc->cdb[0] = REQUEST_SENSE;
2613 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2615 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2616 qc->tf.command = ATA_CMD_PACKET;
2618 if (ata_pio_use_silly(ap)) {
2619 qc->tf.protocol = ATAPI_PROT_DMA;
2620 qc->tf.feature |= ATAPI_PKT_DMA;
2622 qc->tf.protocol = ATAPI_PROT_PIO;
2623 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2626 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2628 qc->complete_fn = atapi_sense_complete;
2635 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2637 struct scsi_cmnd *cmd = qc->scsicmd;
2638 unsigned int err_mask = qc->err_mask;
2640 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2642 /* handle completion from new EH */
2643 if (unlikely(qc->ap->ops->error_handler &&
2644 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2646 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2647 /* FIXME: not quite right; we don't want the
2648 * translation of taskfile registers into a
2649 * sense descriptors, since that's only
2650 * correct for ATA, not ATAPI
2652 ata_gen_passthru_sense(qc);
2655 /* SCSI EH automatically locks door if sdev->locked is
2656 * set. Sometimes door lock request continues to
2657 * fail, for example, when no media is present. This
2658 * creates a loop - SCSI EH issues door lock which
2659 * fails and gets invoked again to acquire sense data
2660 * for the failed command.
2662 * If door lock fails, always clear sdev->locked to
2663 * avoid this infinite loop.
2665 * This may happen before SCSI scan is complete. Make
2666 * sure qc->dev->sdev isn't NULL before dereferencing.
2668 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2669 qc->dev->sdev->locked = 0;
2671 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2677 /* successful completion or old EH failure path */
2678 if (unlikely(err_mask & AC_ERR_DEV)) {
2679 cmd->result = SAM_STAT_CHECK_CONDITION;
2680 atapi_request_sense(qc);
2682 } else if (unlikely(err_mask)) {
2683 /* FIXME: not quite right; we don't want the
2684 * translation of taskfile registers into
2685 * a sense descriptors, since that's only
2686 * correct for ATA, not ATAPI
2688 ata_gen_passthru_sense(qc);
2690 u8 *scsicmd = cmd->cmnd;
2692 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2693 unsigned long flags;
2696 buf = ata_scsi_rbuf_get(cmd, true, &flags);
2698 /* ATAPI devices typically report zero for their SCSI version,
2699 * and sometimes deviate from the spec WRT response data
2700 * format. If SCSI version is reported as zero like normal,
2701 * then we make the following fixups: 1) Fake MMC-5 version,
2702 * to indicate to the Linux scsi midlayer this is a modern
2703 * device. 2) Ensure response data format / ATAPI information
2704 * are always correct.
2711 ata_scsi_rbuf_put(cmd, true, &flags);
2714 cmd->result = SAM_STAT_GOOD;
2721 * atapi_xlat - Initialize PACKET taskfile
2722 * @qc: command structure to be initialized
2725 * spin_lock_irqsave(host lock)
2728 * Zero on success, non-zero on failure.
2730 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2732 struct scsi_cmnd *scmd = qc->scsicmd;
2733 struct ata_device *dev = qc->dev;
2734 int nodata = (scmd->sc_data_direction == DMA_NONE);
2735 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2736 unsigned int nbytes;
2738 memset(qc->cdb, 0, dev->cdb_len);
2739 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2741 qc->complete_fn = atapi_qc_complete;
2743 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2744 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2745 qc->tf.flags |= ATA_TFLAG_WRITE;
2746 DPRINTK("direction: write\n");
2749 qc->tf.command = ATA_CMD_PACKET;
2750 ata_qc_set_pc_nbytes(qc);
2752 /* check whether ATAPI DMA is safe */
2753 if (!nodata && !using_pio && atapi_check_dma(qc))
2756 /* Some controller variants snoop this value for Packet
2757 * transfers to do state machine and FIFO management. Thus we
2758 * want to set it properly, and for DMA where it is
2759 * effectively meaningless.
2761 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2763 /* Most ATAPI devices which honor transfer chunk size don't
2764 * behave according to the spec when odd chunk size which
2765 * matches the transfer length is specified. If the number of
2766 * bytes to transfer is 2n+1. According to the spec, what
2767 * should happen is to indicate that 2n+1 is going to be
2768 * transferred and transfer 2n+2 bytes where the last byte is
2771 * In practice, this doesn't happen. ATAPI devices first
2772 * indicate and transfer 2n bytes and then indicate and
2773 * transfer 2 bytes where the last byte is padding.
2775 * This inconsistency confuses several controllers which
2776 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2777 * These controllers use actual number of transferred bytes to
2778 * update DMA poitner and transfer of 4n+2 bytes make those
2779 * controller push DMA pointer by 4n+4 bytes because SATA data
2780 * FISes are aligned to 4 bytes. This causes data corruption
2781 * and buffer overrun.
2783 * Always setting nbytes to even number solves this problem
2784 * because then ATAPI devices don't have to split data at 2n
2790 qc->tf.lbam = (nbytes & 0xFF);
2791 qc->tf.lbah = (nbytes >> 8);
2794 qc->tf.protocol = ATAPI_PROT_NODATA;
2796 qc->tf.protocol = ATAPI_PROT_PIO;
2799 qc->tf.protocol = ATAPI_PROT_DMA;
2800 qc->tf.feature |= ATAPI_PKT_DMA;
2802 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2803 (scmd->sc_data_direction != DMA_TO_DEVICE))
2804 /* some SATA bridges need us to indicate data xfer direction */
2805 qc->tf.feature |= ATAPI_DMADIR;
2809 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2810 as ATAPI tape drives don't get this right otherwise */
2814 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2816 if (!sata_pmp_attached(ap)) {
2817 if (likely(devno < ata_link_max_devices(&ap->link)))
2818 return &ap->link.device[devno];
2820 if (likely(devno < ap->nr_pmp_links))
2821 return &ap->pmp_link[devno].device[0];
2827 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2828 const struct scsi_device *scsidev)
2832 /* skip commands not addressed to targets we simulate */
2833 if (!sata_pmp_attached(ap)) {
2834 if (unlikely(scsidev->channel || scsidev->lun))
2836 devno = scsidev->id;
2838 if (unlikely(scsidev->id || scsidev->lun))
2840 devno = scsidev->channel;
2843 return ata_find_dev(ap, devno);
2847 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2848 * @ap: ATA port to which the device is attached
2849 * @scsidev: SCSI device from which we derive the ATA device
2851 * Given various information provided in struct scsi_cmnd,
2852 * map that onto an ATA bus, and using that mapping
2853 * determine which ata_device is associated with the
2854 * SCSI command to be sent.
2857 * spin_lock_irqsave(host lock)
2860 * Associated ATA device, or %NULL if not found.
2862 static struct ata_device *
2863 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2865 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2867 if (unlikely(!dev || !ata_dev_enabled(dev)))
2874 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2875 * @byte1: Byte 1 from pass-thru CDB.
2878 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2881 ata_scsi_map_proto(u8 byte1)
2883 switch((byte1 & 0x1e) >> 1) {
2884 case 3: /* Non-data */
2885 return ATA_PROT_NODATA;
2888 case 10: /* UDMA Data-in */
2889 case 11: /* UDMA Data-Out */
2890 return ATA_PROT_DMA;
2892 case 4: /* PIO Data-in */
2893 case 5: /* PIO Data-out */
2894 return ATA_PROT_PIO;
2896 case 0: /* Hard Reset */
2898 case 8: /* Device Diagnostic */
2899 case 9: /* Device Reset */
2900 case 7: /* DMA Queued */
2901 case 12: /* FPDMA */
2902 case 15: /* Return Response Info */
2903 default: /* Reserved */
2907 return ATA_PROT_UNKNOWN;
2911 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2912 * @qc: command structure to be initialized
2914 * Handles either 12 or 16-byte versions of the CDB.
2917 * Zero on success, non-zero on failure.
2919 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2921 struct ata_taskfile *tf = &(qc->tf);
2922 struct scsi_cmnd *scmd = qc->scsicmd;
2923 struct ata_device *dev = qc->dev;
2924 const u8 *cdb = scmd->cmnd;
2926 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2930 * 12 and 16 byte CDBs use different offsets to
2931 * provide the various register values.
2933 if (cdb[0] == ATA_16) {
2935 * 16-byte CDB - may contain extended commands.
2937 * If that is the case, copy the upper byte register values.
2939 if (cdb[1] & 0x01) {
2940 tf->hob_feature = cdb[3];
2941 tf->hob_nsect = cdb[5];
2942 tf->hob_lbal = cdb[7];
2943 tf->hob_lbam = cdb[9];
2944 tf->hob_lbah = cdb[11];
2945 tf->flags |= ATA_TFLAG_LBA48;
2947 tf->flags &= ~ATA_TFLAG_LBA48;
2950 * Always copy low byte, device and command registers.
2952 tf->feature = cdb[4];
2957 tf->device = cdb[13];
2958 tf->command = cdb[14];
2961 * 12-byte CDB - incapable of extended commands.
2963 tf->flags &= ~ATA_TFLAG_LBA48;
2965 tf->feature = cdb[3];
2970 tf->device = cdb[8];
2971 tf->command = cdb[9];
2974 /* enforce correct master/slave bit */
2975 tf->device = dev->devno ?
2976 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2978 switch (tf->command) {
2979 /* READ/WRITE LONG use a non-standard sect_size */
2980 case ATA_CMD_READ_LONG:
2981 case ATA_CMD_READ_LONG_ONCE:
2982 case ATA_CMD_WRITE_LONG:
2983 case ATA_CMD_WRITE_LONG_ONCE:
2984 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2986 qc->sect_size = scsi_bufflen(scmd);
2989 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2990 case ATA_CMD_CFA_WRITE_NE:
2991 case ATA_CMD_CFA_TRANS_SECT:
2992 case ATA_CMD_CFA_WRITE_MULT_NE:
2993 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2995 case ATA_CMD_READ_EXT:
2996 case ATA_CMD_READ_QUEUED:
2997 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2998 case ATA_CMD_FPDMA_READ:
2999 case ATA_CMD_READ_MULTI:
3000 case ATA_CMD_READ_MULTI_EXT:
3001 case ATA_CMD_PIO_READ:
3002 case ATA_CMD_PIO_READ_EXT:
3003 case ATA_CMD_READ_STREAM_DMA_EXT:
3004 case ATA_CMD_READ_STREAM_EXT:
3005 case ATA_CMD_VERIFY:
3006 case ATA_CMD_VERIFY_EXT:
3008 case ATA_CMD_WRITE_EXT:
3009 case ATA_CMD_WRITE_FUA_EXT:
3010 case ATA_CMD_WRITE_QUEUED:
3011 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
3012 case ATA_CMD_FPDMA_WRITE:
3013 case ATA_CMD_WRITE_MULTI:
3014 case ATA_CMD_WRITE_MULTI_EXT:
3015 case ATA_CMD_WRITE_MULTI_FUA_EXT:
3016 case ATA_CMD_PIO_WRITE:
3017 case ATA_CMD_PIO_WRITE_EXT:
3018 case ATA_CMD_WRITE_STREAM_DMA_EXT:
3019 case ATA_CMD_WRITE_STREAM_EXT:
3020 qc->sect_size = scmd->device->sector_size;
3023 /* Everything else uses 512 byte "sectors" */
3025 qc->sect_size = ATA_SECT_SIZE;
3029 * Set flags so that all registers will be written, pass on
3030 * write indication (used for PIO/DMA setup), result TF is
3031 * copied back and we don't whine too much about its failure.
3033 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3034 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3035 tf->flags |= ATA_TFLAG_WRITE;
3037 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3040 * Set transfer length.
3042 * TODO: find out if we need to do more here to
3043 * cover scatter/gather case.
3045 ata_qc_set_pc_nbytes(qc);
3047 /* We may not issue DMA commands if no DMA mode is set */
3048 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
3051 /* sanity check for pio multi commands */
3052 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
3055 if (is_multi_taskfile(tf)) {
3056 unsigned int multi_count = 1 << (cdb[1] >> 5);
3058 /* compare the passed through multi_count
3059 * with the cached multi_count of libata
3061 if (multi_count != dev->multi_count)
3062 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3067 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3068 * SET_FEATURES - XFER MODE must be preceded/succeeded
3069 * by an update to hardware-specific registers for each
3070 * controller (i.e. the reason for ->set_piomode(),
3071 * ->set_dmamode(), and ->post_set_mode() hooks).
3073 if (tf->command == ATA_CMD_SET_FEATURES &&
3074 tf->feature == SETFEATURES_XFER)
3078 * Filter TPM commands by default. These provide an
3079 * essentially uncontrolled encrypted "back door" between
3080 * applications and the disk. Set libata.allow_tpm=1 if you
3081 * have a real reason for wanting to use them. This ensures
3082 * that installed software cannot easily mess stuff up without
3083 * user intent. DVR type users will probably ship with this enabled
3084 * for movie content management.
3086 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3087 * for this and should do in future but that it is not sufficient as
3088 * DCS is an optional feature set. Thus we also do the software filter
3089 * so that we comply with the TC consortium stated goal that the user
3090 * can turn off TC features of their system.
3092 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
3098 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3099 /* "Invalid field in cdb" */
3103 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3105 struct ata_taskfile *tf = &qc->tf;
3106 struct scsi_cmnd *scmd = qc->scsicmd;
3107 struct ata_device *dev = qc->dev;
3108 const u8 *cdb = scmd->cmnd;
3114 /* we may not issue DMA commands if no DMA mode is set */
3115 if (unlikely(!dev->dma_mode))
3118 if (unlikely(scmd->cmd_len < 16))
3120 scsi_16_lba_len(cdb, &block, &n_block);
3122 /* for now we only support WRITE SAME with the unmap bit set */
3123 if (unlikely(!(cdb[1] & 0x8)))
3127 * WRITE SAME always has a sector sized buffer as payload, this
3128 * should never be a multiple entry S/G list.
3130 if (!scsi_sg_count(scmd))
3133 buf = page_address(sg_page(scsi_sglist(scmd)));
3134 size = ata_set_lba_range_entries(buf, 512, block, n_block);
3136 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3137 /* Newer devices support queued TRIM commands */
3138 tf->protocol = ATA_PROT_NCQ;
3139 tf->command = ATA_CMD_FPDMA_SEND;
3140 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3141 tf->nsect = qc->tag << 3;
3142 tf->hob_feature = (size / 512) >> 8;
3143 tf->feature = size / 512;
3147 tf->protocol = ATA_PROT_DMA;
3148 tf->hob_feature = 0;
3149 tf->feature = ATA_DSM_TRIM;
3150 tf->hob_nsect = (size / 512) >> 8;
3151 tf->nsect = size / 512;
3152 tf->command = ATA_CMD_DSM;
3155 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3158 ata_qc_set_pc_nbytes(qc);
3163 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3164 /* "Invalid field in cdb" */
3169 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3170 * @qc: Storage for translated ATA taskfile
3171 * @buf: input buffer
3172 * @len: number of valid bytes in the input buffer
3174 * Prepare a taskfile to modify caching information for the device.
3179 static int ata_mselect_caching(struct ata_queued_cmd *qc,
3180 const u8 *buf, int len)
3182 struct ata_taskfile *tf = &qc->tf;
3183 struct ata_device *dev = qc->dev;
3184 char mpage[CACHE_MPAGE_LEN];
3188 * The first two bytes of def_cache_mpage are a header, so offsets
3189 * in mpage are off by 2 compared to buf. Same for len.
3192 if (len != CACHE_MPAGE_LEN - 2)
3195 wce = buf[0] & (1 << 2);
3198 * Check that read-only bits are not modified.
3200 ata_msense_caching(dev->id, mpage, false);
3201 mpage[2] &= ~(1 << 2);
3203 if (memcmp(mpage + 2, buf, CACHE_MPAGE_LEN - 2) != 0)
3206 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3207 tf->protocol = ATA_PROT_NODATA;
3209 tf->command = ATA_CMD_SET_FEATURES;
3210 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3215 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
3216 * @qc: Storage for translated ATA taskfile
3218 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3219 * Assume this is invoked for direct access devices (e.g. disks) only.
3220 * There should be no block descriptor for other device types.
3223 * spin_lock_irqsave(host lock)
3225 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3227 struct scsi_cmnd *scmd = qc->scsicmd;
3228 const u8 *cdb = scmd->cmnd;
3231 unsigned six_byte, pg_len, hdr_len, bd_len;
3236 six_byte = (cdb[0] == MODE_SELECT);
3238 if (scmd->cmd_len < 5)
3244 if (scmd->cmd_len < 9)
3247 len = (cdb[7] << 8) + cdb[8];
3251 /* We only support PF=1, SP=0. */
3252 if ((cdb[1] & 0x11) != 0x10)
3255 /* Test early for possible overrun. */
3256 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
3257 goto invalid_param_len;
3259 p = page_address(sg_page(scsi_sglist(scmd)));
3261 /* Move past header and block descriptors. */
3263 goto invalid_param_len;
3268 bd_len = (p[6] << 8) + p[7];
3273 goto invalid_param_len;
3274 if (bd_len != 0 && bd_len != 8)
3282 /* Parse both possible formats for the mode page headers. */
3286 goto invalid_param_len;
3289 pg_len = (p[2] << 8) | p[3];
3294 goto invalid_param_len;
3303 * No mode subpages supported (yet) but asking for _all_
3304 * subpages may be valid
3306 if (spg && (spg != ALL_SUB_MPAGES))
3309 goto invalid_param_len;
3313 if (ata_mselect_caching(qc, p, pg_len) < 0)
3317 default: /* invalid page code */
3322 * Only one page has changeable data, so we only support setting one
3331 /* "Invalid field in CDB" */
3332 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
3336 /* "Invalid field in parameter list" */
3337 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x26, 0x0);
3341 /* "Parameter list length error" */
3342 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3346 scmd->result = SAM_STAT_GOOD;
3351 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3353 * @cmd: SCSI command opcode to consider
3355 * Look up the SCSI command given, and determine whether the
3356 * SCSI command is to be translated or simulated.
3359 * Pointer to translation function if possible, %NULL if not.
3362 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3372 return ata_scsi_rw_xlat;
3375 return ata_scsi_write_same_xlat;
3377 case SYNCHRONIZE_CACHE:
3378 if (ata_try_flush_cache(dev))
3379 return ata_scsi_flush_xlat;
3384 return ata_scsi_verify_xlat;
3388 return ata_scsi_pass_thru;
3391 case MODE_SELECT_10:
3392 return ata_scsi_mode_select_xlat;
3396 return ata_scsi_start_stop_xlat;
3403 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3404 * @ap: ATA port to which the command was being sent
3405 * @cmd: SCSI command to dump
3407 * Prints the contents of a SCSI command via printk().
3410 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3411 struct scsi_cmnd *cmd)
3414 struct scsi_device *scsidev = cmd->device;
3415 u8 *scsicmd = cmd->cmnd;
3417 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
3419 scsidev->channel, scsidev->id, scsidev->lun,
3420 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3421 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3426 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
3427 struct ata_device *dev)
3429 u8 scsi_op = scmd->cmnd[0];
3430 ata_xlat_func_t xlat_func;
3433 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
3434 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3437 xlat_func = ata_get_xlat_func(dev, scsi_op);
3439 if (unlikely(!scmd->cmd_len))
3443 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3444 /* relay SCSI command to ATAPI device */
3445 int len = COMMAND_SIZE(scsi_op);
3446 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
3449 xlat_func = atapi_xlat;
3451 /* ATA_16 passthru, treat as an ATA command */
3452 if (unlikely(scmd->cmd_len > 16))
3455 xlat_func = ata_get_xlat_func(dev, scsi_op);
3460 rc = ata_scsi_translate(dev, scmd, xlat_func);
3462 ata_scsi_simulate(dev, scmd);
3467 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3468 scmd->cmd_len, scsi_op, dev->cdb_len);
3469 scmd->result = DID_ERROR << 16;
3470 scmd->scsi_done(scmd);
3475 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3476 * @shost: SCSI host of command to be sent
3477 * @cmd: SCSI command to be sent
3479 * In some cases, this function translates SCSI commands into
3480 * ATA taskfiles, and queues the taskfiles to be sent to
3481 * hardware. In other cases, this function simulates a
3482 * SCSI device by evaluating and responding to certain
3483 * SCSI commands. This creates the overall effect of
3484 * ATA and ATAPI devices appearing as SCSI devices.
3490 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3493 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
3495 struct ata_port *ap;
3496 struct ata_device *dev;
3497 struct scsi_device *scsidev = cmd->device;
3499 unsigned long irq_flags;
3501 ap = ata_shost_to_port(shost);
3503 spin_lock_irqsave(ap->lock, irq_flags);
3505 ata_scsi_dump_cdb(ap, cmd);
3507 dev = ata_scsi_find_dev(ap, scsidev);
3509 rc = __ata_scsi_queuecmd(cmd, dev);
3511 cmd->result = (DID_BAD_TARGET << 16);
3512 cmd->scsi_done(cmd);
3515 spin_unlock_irqrestore(ap->lock, irq_flags);
3521 * ata_scsi_simulate - simulate SCSI command on ATA device
3522 * @dev: the target device
3523 * @cmd: SCSI command being sent to device.
3525 * Interprets and directly executes a select list of SCSI commands
3526 * that can be handled internally.
3529 * spin_lock_irqsave(host lock)
3532 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
3534 struct ata_scsi_args args;
3535 const u8 *scsicmd = cmd->cmnd;
3541 args.done = cmd->scsi_done;
3543 switch(scsicmd[0]) {
3544 /* TODO: worth improving? */
3546 ata_scsi_invalid_field(cmd);
3550 if (scsicmd[1] & 2) /* is CmdDt set? */
3551 ata_scsi_invalid_field(cmd);
3552 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3553 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3554 else switch (scsicmd[2]) {
3556 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
3559 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
3562 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
3565 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3568 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3571 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3574 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
3577 ata_scsi_invalid_field(cmd);
3584 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3588 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3591 case SERVICE_ACTION_IN_16:
3592 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3593 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3595 ata_scsi_invalid_field(cmd);
3599 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3603 ata_scsi_set_sense(cmd, 0, 0, 0);
3604 cmd->result = (DRIVER_SENSE << 24);
3605 cmd->scsi_done(cmd);
3608 /* if we reach this, then writeback caching is disabled,
3609 * turning this into a no-op.
3611 case SYNCHRONIZE_CACHE:
3614 /* no-op's, complete with success */
3618 case TEST_UNIT_READY:
3619 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3622 case SEND_DIAGNOSTIC:
3623 tmp8 = scsicmd[1] & ~(1 << 3);
3624 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3625 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3627 ata_scsi_invalid_field(cmd);
3630 /* all other commands */
3632 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3633 /* "Invalid command operation code" */
3634 cmd->scsi_done(cmd);
3639 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3643 for (i = 0; i < host->n_ports; i++) {
3644 struct ata_port *ap = host->ports[i];
3645 struct Scsi_Host *shost;
3648 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3652 shost->eh_noresume = 1;
3653 *(struct ata_port **)&shost->hostdata[0] = ap;
3654 ap->scsi_host = shost;
3656 shost->transportt = ata_scsi_transport_template;
3657 shost->unique_id = ap->print_id;
3660 shost->max_channel = 1;
3661 shost->max_cmd_len = 16;
3662 shost->no_write_same = 1;
3664 /* Schedule policy is determined by ->qc_defer()
3665 * callback and it needs to see every deferred qc.
3666 * Set host_blocked to 1 to prevent SCSI midlayer from
3667 * automatically deferring requests.
3669 shost->max_host_blocked = 1;
3671 if (scsi_init_shared_tag_map(shost, host->n_tags))
3674 rc = scsi_add_host_with_dma(ap->scsi_host,
3675 &ap->tdev, ap->host->dev);
3683 scsi_host_put(host->ports[i]->scsi_host);
3686 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3688 scsi_remove_host(shost);
3689 scsi_host_put(shost);
3694 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3697 struct ata_device *last_failed_dev = NULL;
3698 struct ata_link *link;
3699 struct ata_device *dev;
3702 ata_for_each_link(link, ap, EDGE) {
3703 ata_for_each_dev(dev, link, ENABLED) {
3704 struct scsi_device *sdev;
3705 int channel = 0, id = 0;
3710 if (ata_is_host_link(link))
3713 channel = link->pmp;
3715 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3717 if (!IS_ERR(sdev)) {
3719 scsi_device_put(sdev);
3726 /* If we scanned while EH was in progress or allocation
3727 * failure occurred, scan would have failed silently. Check
3728 * whether all devices are attached.
3730 ata_for_each_link(link, ap, EDGE) {
3731 ata_for_each_dev(dev, link, ENABLED) {
3740 /* we're missing some SCSI devices */
3742 /* If caller requested synchrnous scan && we've made
3743 * any progress, sleep briefly and repeat.
3745 if (dev != last_failed_dev) {
3747 last_failed_dev = dev;
3751 /* We might be failing to detect boot device, give it
3752 * a few more chances.
3760 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
3763 queue_delayed_work(system_long_wq, &ap->hotplug_task,
3764 round_jiffies_relative(HZ));
3768 * ata_scsi_offline_dev - offline attached SCSI device
3769 * @dev: ATA device to offline attached SCSI device for
3771 * This function is called from ata_eh_hotplug() and responsible
3772 * for taking the SCSI device attached to @dev offline. This
3773 * function is called with host lock which protects dev->sdev
3777 * spin_lock_irqsave(host lock)
3780 * 1 if attached SCSI device exists, 0 otherwise.
3782 int ata_scsi_offline_dev(struct ata_device *dev)
3785 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3792 * ata_scsi_remove_dev - remove attached SCSI device
3793 * @dev: ATA device to remove attached SCSI device for
3795 * This function is called from ata_eh_scsi_hotplug() and
3796 * responsible for removing the SCSI device attached to @dev.
3799 * Kernel thread context (may sleep).
3801 static void ata_scsi_remove_dev(struct ata_device *dev)
3803 struct ata_port *ap = dev->link->ap;
3804 struct scsi_device *sdev;
3805 unsigned long flags;
3807 /* Alas, we need to grab scan_mutex to ensure SCSI device
3808 * state doesn't change underneath us and thus
3809 * scsi_device_get() always succeeds. The mutex locking can
3810 * be removed if there is __scsi_device_get() interface which
3811 * increments reference counts regardless of device state.
3813 mutex_lock(&ap->scsi_host->scan_mutex);
3814 spin_lock_irqsave(ap->lock, flags);
3816 /* clearing dev->sdev is protected by host lock */
3821 /* If user initiated unplug races with us, sdev can go
3822 * away underneath us after the host lock and
3823 * scan_mutex are released. Hold onto it.
3825 if (scsi_device_get(sdev) == 0) {
3826 /* The following ensures the attached sdev is
3827 * offline on return from ata_scsi_offline_dev()
3828 * regardless it wins or loses the race
3829 * against this function.
3831 scsi_device_set_state(sdev, SDEV_OFFLINE);
3838 spin_unlock_irqrestore(ap->lock, flags);
3839 mutex_unlock(&ap->scsi_host->scan_mutex);
3842 ata_dev_info(dev, "detaching (SCSI %s)\n",
3843 dev_name(&sdev->sdev_gendev));
3845 scsi_remove_device(sdev);
3846 scsi_device_put(sdev);
3850 static void ata_scsi_handle_link_detach(struct ata_link *link)
3852 struct ata_port *ap = link->ap;
3853 struct ata_device *dev;
3855 ata_for_each_dev(dev, link, ALL) {
3856 unsigned long flags;
3858 if (!(dev->flags & ATA_DFLAG_DETACHED))
3861 spin_lock_irqsave(ap->lock, flags);
3862 dev->flags &= ~ATA_DFLAG_DETACHED;
3863 spin_unlock_irqrestore(ap->lock, flags);
3865 if (zpodd_dev_enabled(dev))
3868 ata_scsi_remove_dev(dev);
3873 * ata_scsi_media_change_notify - send media change event
3874 * @dev: Pointer to the disk device with media change event
3876 * Tell the block layer to send a media change notification
3880 * spin_lock_irqsave(host lock)
3882 void ata_scsi_media_change_notify(struct ata_device *dev)
3885 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3890 * ata_scsi_hotplug - SCSI part of hotplug
3891 * @work: Pointer to ATA port to perform SCSI hotplug on
3893 * Perform SCSI part of hotplug. It's executed from a separate
3894 * workqueue after EH completes. This is necessary because SCSI
3895 * hot plugging requires working EH and hot unplugging is
3896 * synchronized with hot plugging with a mutex.
3899 * Kernel thread context (may sleep).
3901 void ata_scsi_hotplug(struct work_struct *work)
3903 struct ata_port *ap =
3904 container_of(work, struct ata_port, hotplug_task.work);
3907 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3908 DPRINTK("ENTER/EXIT - unloading\n");
3915 * The block layer suspend/resume path is fundamentally broken due
3916 * to freezable kthreads and workqueue and may deadlock if a block
3917 * device gets removed while resume is in progress. I don't know
3918 * what the solution is short of removing freezable kthreads and
3919 * workqueues altogether.
3921 * The following is an ugly hack to avoid kicking off device
3922 * removal while freezer is active. This is a joke but does avoid
3923 * this particular deadlock scenario.
3925 * https://bugzilla.kernel.org/show_bug.cgi?id=62801
3926 * http://marc.info/?l=linux-kernel&m=138695698516487
3928 #ifdef CONFIG_FREEZER
3934 mutex_lock(&ap->scsi_scan_mutex);
3936 /* Unplug detached devices. We cannot use link iterator here
3937 * because PMP links have to be scanned even if PMP is
3938 * currently not attached. Iterate manually.
3940 ata_scsi_handle_link_detach(&ap->link);
3942 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3943 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3945 /* scan for new ones */
3946 ata_scsi_scan_host(ap, 0);
3948 mutex_unlock(&ap->scsi_scan_mutex);
3953 * ata_scsi_user_scan - indication for user-initiated bus scan
3954 * @shost: SCSI host to scan
3955 * @channel: Channel to scan
3959 * This function is called when user explicitly requests bus
3960 * scan. Set probe pending flag and invoke EH.
3963 * SCSI layer (we don't care)
3968 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3969 unsigned int id, u64 lun)
3971 struct ata_port *ap = ata_shost_to_port(shost);
3972 unsigned long flags;
3975 if (!ap->ops->error_handler)
3978 if (lun != SCAN_WILD_CARD && lun)
3981 if (!sata_pmp_attached(ap)) {
3982 if (channel != SCAN_WILD_CARD && channel)
3986 if (id != SCAN_WILD_CARD && id)
3991 spin_lock_irqsave(ap->lock, flags);
3993 if (devno == SCAN_WILD_CARD) {
3994 struct ata_link *link;
3996 ata_for_each_link(link, ap, EDGE) {
3997 struct ata_eh_info *ehi = &link->eh_info;
3998 ehi->probe_mask |= ATA_ALL_DEVICES;
3999 ehi->action |= ATA_EH_RESET;
4002 struct ata_device *dev = ata_find_dev(ap, devno);
4005 struct ata_eh_info *ehi = &dev->link->eh_info;
4006 ehi->probe_mask |= 1 << dev->devno;
4007 ehi->action |= ATA_EH_RESET;
4013 ata_port_schedule_eh(ap);
4014 spin_unlock_irqrestore(ap->lock, flags);
4015 ata_port_wait_eh(ap);
4017 spin_unlock_irqrestore(ap->lock, flags);
4023 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4024 * @work: Pointer to ATA port to perform scsi_rescan_device()
4026 * After ATA pass thru (SAT) commands are executed successfully,
4027 * libata need to propagate the changes to SCSI layer.
4030 * Kernel thread context (may sleep).
4032 void ata_scsi_dev_rescan(struct work_struct *work)
4034 struct ata_port *ap =
4035 container_of(work, struct ata_port, scsi_rescan_task);
4036 struct ata_link *link;
4037 struct ata_device *dev;
4038 unsigned long flags;
4040 mutex_lock(&ap->scsi_scan_mutex);
4041 spin_lock_irqsave(ap->lock, flags);
4043 ata_for_each_link(link, ap, EDGE) {
4044 ata_for_each_dev(dev, link, ENABLED) {
4045 struct scsi_device *sdev = dev->sdev;
4049 if (scsi_device_get(sdev))
4052 spin_unlock_irqrestore(ap->lock, flags);
4053 scsi_rescan_device(&(sdev->sdev_gendev));
4054 scsi_device_put(sdev);
4055 spin_lock_irqsave(ap->lock, flags);
4059 spin_unlock_irqrestore(ap->lock, flags);
4060 mutex_unlock(&ap->scsi_scan_mutex);
4064 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4065 * @host: ATA host container for all SAS ports
4066 * @port_info: Information from low-level host driver
4067 * @shost: SCSI host that the scsi device is attached to
4070 * PCI/etc. bus probe sem.
4073 * ata_port pointer on success / NULL on failure.
4076 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
4077 struct ata_port_info *port_info,
4078 struct Scsi_Host *shost)
4080 struct ata_port *ap;
4082 ap = ata_port_alloc(host);
4087 ap->lock = &host->lock;
4088 ap->pio_mask = port_info->pio_mask;
4089 ap->mwdma_mask = port_info->mwdma_mask;
4090 ap->udma_mask = port_info->udma_mask;
4091 ap->flags |= port_info->flags;
4092 ap->ops = port_info->port_ops;
4093 ap->cbl = ATA_CBL_SATA;
4097 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
4100 * ata_sas_port_start - Set port up for dma.
4101 * @ap: Port to initialize
4103 * Called just after data structures for each port are
4106 * May be used as the port_start() entry in ata_port_operations.
4109 * Inherited from caller.
4111 int ata_sas_port_start(struct ata_port *ap)
4114 * the port is marked as frozen at allocation time, but if we don't
4115 * have new eh, we won't thaw it
4117 if (!ap->ops->error_handler)
4118 ap->pflags &= ~ATA_PFLAG_FROZEN;
4121 EXPORT_SYMBOL_GPL(ata_sas_port_start);
4124 * ata_port_stop - Undo ata_sas_port_start()
4125 * @ap: Port to shut down
4127 * May be used as the port_stop() entry in ata_port_operations.
4130 * Inherited from caller.
4133 void ata_sas_port_stop(struct ata_port *ap)
4136 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
4139 * ata_sas_async_probe - simply schedule probing and return
4140 * @ap: Port to probe
4142 * For batch scheduling of probe for sas attached ata devices, assumes
4143 * the port has already been through ata_sas_port_init()
4145 void ata_sas_async_probe(struct ata_port *ap)
4147 __ata_port_probe(ap);
4149 EXPORT_SYMBOL_GPL(ata_sas_async_probe);
4151 int ata_sas_sync_probe(struct ata_port *ap)
4153 return ata_port_probe(ap);
4155 EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
4159 * ata_sas_port_init - Initialize a SATA device
4160 * @ap: SATA port to initialize
4163 * PCI/etc. bus probe sem.
4166 * Zero on success, non-zero on error.
4169 int ata_sas_port_init(struct ata_port *ap)
4171 int rc = ap->ops->port_start(ap);
4175 ap->print_id = atomic_inc_return(&ata_print_id);
4178 EXPORT_SYMBOL_GPL(ata_sas_port_init);
4181 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
4182 * @ap: SATA port to destroy
4186 void ata_sas_port_destroy(struct ata_port *ap)
4188 if (ap->ops->port_stop)
4189 ap->ops->port_stop(ap);
4192 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
4195 * ata_sas_slave_configure - Default slave_config routine for libata devices
4196 * @sdev: SCSI device to configure
4197 * @ap: ATA port to which SCSI device is attached
4203 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
4205 ata_scsi_sdev_config(sdev);
4206 ata_scsi_dev_config(sdev, ap->link.device);
4209 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
4212 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
4213 * @cmd: SCSI command to be sent
4214 * @ap: ATA port to which the command is being sent
4217 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4221 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
4225 ata_scsi_dump_cdb(ap, cmd);
4227 if (likely(ata_dev_enabled(ap->link.device)))
4228 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
4230 cmd->result = (DID_BAD_TARGET << 16);
4231 cmd->scsi_done(cmd);
4235 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
4237 int ata_sas_allocate_tag(struct ata_port *ap)
4239 unsigned int max_queue = ap->host->n_tags;
4240 unsigned int i, tag;
4242 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) {
4243 if (ap->flags & ATA_FLAG_LOWTAG)
4246 tag = tag < max_queue ? tag : 0;
4248 /* the last tag is reserved for internal command. */
4249 if (tag == ATA_TAG_INTERNAL)
4252 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) {
4253 ap->sas_last_tag = tag;
4260 void ata_sas_free_tag(unsigned int tag, struct ata_port *ap)
4262 clear_bit(tag, &ap->sas_tag_allocated);