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>
53 #include <linux/ioprio.h>
56 #include "libata-transport.h"
58 #define ATA_SCSI_RBUF_SIZE 4096
60 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
62 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
63 const struct scsi_device *scsidev);
64 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
65 const struct scsi_device *scsidev);
67 #define RW_RECOVERY_MPAGE 0x1
68 #define RW_RECOVERY_MPAGE_LEN 12
69 #define CACHE_MPAGE 0x8
70 #define CACHE_MPAGE_LEN 20
71 #define CONTROL_MPAGE 0xa
72 #define CONTROL_MPAGE_LEN 12
73 #define ALL_MPAGES 0x3f
74 #define ALL_SUB_MPAGES 0xff
77 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
79 RW_RECOVERY_MPAGE_LEN - 2,
81 0, /* read retry count */
83 0, /* write retry count */
87 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
90 0, /* contains WCE, needs to be 0 for logic */
91 0, 0, 0, 0, 0, 0, 0, 0, 0,
92 0, /* contains DRA, needs to be 0 for logic */
96 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
98 CONTROL_MPAGE_LEN - 2,
99 2, /* DSENSE=0, GLTSD=1 */
100 0, /* [QAM+QERR may be 1, see 05-359r1] */
101 0, 0, 0, 0, 0xff, 0xff,
102 0, 30 /* extended self test time, see 05-359r1 */
105 static const char *ata_lpm_policy_names[] = {
106 [ATA_LPM_UNKNOWN] = "max_performance",
107 [ATA_LPM_MAX_POWER] = "max_performance",
108 [ATA_LPM_MED_POWER] = "medium_power",
109 [ATA_LPM_MIN_POWER] = "min_power",
112 static ssize_t ata_scsi_lpm_store(struct device *device,
113 struct device_attribute *attr,
114 const char *buf, size_t count)
116 struct Scsi_Host *shost = class_to_shost(device);
117 struct ata_port *ap = ata_shost_to_port(shost);
118 struct ata_link *link;
119 struct ata_device *dev;
120 enum ata_lpm_policy policy;
123 /* UNKNOWN is internal state, iterate from MAX_POWER */
124 for (policy = ATA_LPM_MAX_POWER;
125 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
126 const char *name = ata_lpm_policy_names[policy];
128 if (strncmp(name, buf, strlen(name)) == 0)
131 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
134 spin_lock_irqsave(ap->lock, flags);
136 ata_for_each_link(link, ap, EDGE) {
137 ata_for_each_dev(dev, &ap->link, ENABLED) {
138 if (dev->horkage & ATA_HORKAGE_NOLPM) {
145 ap->target_lpm_policy = policy;
146 ata_port_schedule_eh(ap);
148 spin_unlock_irqrestore(ap->lock, flags);
152 static ssize_t ata_scsi_lpm_show(struct device *dev,
153 struct device_attribute *attr, char *buf)
155 struct Scsi_Host *shost = class_to_shost(dev);
156 struct ata_port *ap = ata_shost_to_port(shost);
158 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
161 return snprintf(buf, PAGE_SIZE, "%s\n",
162 ata_lpm_policy_names[ap->target_lpm_policy]);
164 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
165 ata_scsi_lpm_show, ata_scsi_lpm_store);
166 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
168 static ssize_t ata_scsi_park_show(struct device *device,
169 struct device_attribute *attr, char *buf)
171 struct scsi_device *sdev = to_scsi_device(device);
173 struct ata_link *link;
174 struct ata_device *dev;
176 unsigned int uninitialized_var(msecs);
179 ap = ata_shost_to_port(sdev->host);
181 spin_lock_irq(ap->lock);
182 dev = ata_scsi_find_dev(ap, sdev);
187 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
194 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
195 link->eh_context.unloaded_mask & (1 << dev->devno) &&
196 time_after(dev->unpark_deadline, now))
197 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
202 spin_unlock_irq(ap->lock);
204 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
207 static ssize_t ata_scsi_park_store(struct device *device,
208 struct device_attribute *attr,
209 const char *buf, size_t len)
211 struct scsi_device *sdev = to_scsi_device(device);
213 struct ata_device *dev;
218 rc = kstrtol(buf, 10, &input);
223 if (input > ATA_TMOUT_MAX_PARK) {
225 input = ATA_TMOUT_MAX_PARK;
228 ap = ata_shost_to_port(sdev->host);
230 spin_lock_irqsave(ap->lock, flags);
231 dev = ata_scsi_find_dev(ap, sdev);
232 if (unlikely(!dev)) {
236 if (dev->class != ATA_DEV_ATA &&
237 dev->class != ATA_DEV_ZAC) {
243 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
248 dev->unpark_deadline = ata_deadline(jiffies, input);
249 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
250 ata_port_schedule_eh(ap);
251 complete(&ap->park_req_pending);
255 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
258 dev->flags |= ATA_DFLAG_NO_UNLOAD;
263 spin_unlock_irqrestore(ap->lock, flags);
265 return rc ? rc : len;
267 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
268 ata_scsi_park_show, ata_scsi_park_store);
269 EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
271 static ssize_t ata_ncq_prio_enable_show(struct device *device,
272 struct device_attribute *attr,
275 struct scsi_device *sdev = to_scsi_device(device);
277 struct ata_device *dev;
278 bool ncq_prio_enable;
281 ap = ata_shost_to_port(sdev->host);
283 spin_lock_irq(ap->lock);
284 dev = ata_scsi_find_dev(ap, sdev);
290 ncq_prio_enable = dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE;
293 spin_unlock_irq(ap->lock);
295 return rc ? rc : snprintf(buf, 20, "%u\n", ncq_prio_enable);
298 static ssize_t ata_ncq_prio_enable_store(struct device *device,
299 struct device_attribute *attr,
300 const char *buf, size_t len)
302 struct scsi_device *sdev = to_scsi_device(device);
304 struct ata_device *dev;
308 rc = kstrtol(buf, 10, &input);
311 if ((input < 0) || (input > 1))
314 ap = ata_shost_to_port(sdev->host);
315 dev = ata_scsi_find_dev(ap, sdev);
319 spin_lock_irq(ap->lock);
321 dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLE;
323 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
325 dev->link->eh_info.action |= ATA_EH_REVALIDATE;
326 dev->link->eh_info.flags |= ATA_EHI_QUIET;
327 ata_port_schedule_eh(ap);
328 spin_unlock_irq(ap->lock);
330 ata_port_wait_eh(ap);
333 spin_lock_irq(ap->lock);
334 if (!(dev->flags & ATA_DFLAG_NCQ_PRIO)) {
335 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
338 spin_unlock_irq(ap->lock);
341 return rc ? rc : len;
344 DEVICE_ATTR(ncq_prio_enable, S_IRUGO | S_IWUSR,
345 ata_ncq_prio_enable_show, ata_ncq_prio_enable_store);
346 EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_enable);
348 void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd,
349 u8 sk, u8 asc, u8 ascq)
351 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
356 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
358 scsi_build_sense_buffer(d_sense, cmd->sense_buffer, sk, asc, ascq);
361 void ata_scsi_set_sense_information(struct ata_device *dev,
362 struct scsi_cmnd *cmd,
363 const struct ata_taskfile *tf)
370 information = ata_tf_read_block(tf, dev);
371 if (information == U64_MAX)
374 scsi_set_sense_information(cmd->sense_buffer,
375 SCSI_SENSE_BUFFERSIZE, information);
378 static void ata_scsi_set_invalid_field(struct ata_device *dev,
379 struct scsi_cmnd *cmd, u16 field, u8 bit)
381 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0);
382 /* "Invalid field in CDB" */
383 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
387 static void ata_scsi_set_invalid_parameter(struct ata_device *dev,
388 struct scsi_cmnd *cmd, u16 field)
390 /* "Invalid field in parameter list" */
391 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0);
392 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
397 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
398 const char *buf, size_t count)
400 struct Scsi_Host *shost = class_to_shost(dev);
401 struct ata_port *ap = ata_shost_to_port(shost);
402 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
403 return ap->ops->em_store(ap, buf, count);
408 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
411 struct Scsi_Host *shost = class_to_shost(dev);
412 struct ata_port *ap = ata_shost_to_port(shost);
414 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
415 return ap->ops->em_show(ap, buf);
418 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
419 ata_scsi_em_message_show, ata_scsi_em_message_store);
420 EXPORT_SYMBOL_GPL(dev_attr_em_message);
423 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
426 struct Scsi_Host *shost = class_to_shost(dev);
427 struct ata_port *ap = ata_shost_to_port(shost);
429 return snprintf(buf, 23, "%d\n", ap->em_message_type);
431 DEVICE_ATTR(em_message_type, S_IRUGO,
432 ata_scsi_em_message_type_show, NULL);
433 EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
436 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
439 struct scsi_device *sdev = to_scsi_device(dev);
440 struct ata_port *ap = ata_shost_to_port(sdev->host);
441 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
443 if (atadev && ap->ops->sw_activity_show &&
444 (ap->flags & ATA_FLAG_SW_ACTIVITY))
445 return ap->ops->sw_activity_show(atadev, buf);
450 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
451 const char *buf, size_t count)
453 struct scsi_device *sdev = to_scsi_device(dev);
454 struct ata_port *ap = ata_shost_to_port(sdev->host);
455 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
456 enum sw_activity val;
459 if (atadev && ap->ops->sw_activity_store &&
460 (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
461 val = simple_strtoul(buf, NULL, 0);
463 case OFF: case BLINK_ON: case BLINK_OFF:
464 rc = ap->ops->sw_activity_store(atadev, val);
473 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
474 ata_scsi_activity_store);
475 EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
477 struct device_attribute *ata_common_sdev_attrs[] = {
478 &dev_attr_unload_heads,
479 &dev_attr_ncq_prio_enable,
482 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
485 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
486 * @sdev: SCSI device for which BIOS geometry is to be determined
487 * @bdev: block device associated with @sdev
488 * @capacity: capacity of SCSI device
489 * @geom: location to which geometry will be output
491 * Generic bios head/sector/cylinder calculator
492 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
493 * mapping. Some situations may arise where the disk is not
494 * bootable if this is not used.
497 * Defined by the SCSI layer. We don't really care.
502 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
503 sector_t capacity, int geom[])
507 sector_div(capacity, 255*63);
514 * ata_scsi_unlock_native_capacity - unlock native capacity
515 * @sdev: SCSI device to adjust device capacity for
517 * This function is called if a partition on @sdev extends beyond
518 * the end of the device. It requests EH to unlock HPA.
521 * Defined by the SCSI layer. Might sleep.
523 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
525 struct ata_port *ap = ata_shost_to_port(sdev->host);
526 struct ata_device *dev;
529 spin_lock_irqsave(ap->lock, flags);
531 dev = ata_scsi_find_dev(ap, sdev);
532 if (dev && dev->n_sectors < dev->n_native_sectors) {
533 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
534 dev->link->eh_info.action |= ATA_EH_RESET;
535 ata_port_schedule_eh(ap);
538 spin_unlock_irqrestore(ap->lock, flags);
539 ata_port_wait_eh(ap);
543 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
545 * @sdev: SCSI device to get identify data for
546 * @arg: User buffer area for identify data
549 * Defined by the SCSI layer. We don't really care.
552 * Zero on success, negative errno on error.
554 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
557 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
558 u16 __user *dst = arg;
564 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
567 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
568 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
571 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
572 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
575 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
576 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
583 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
584 * @scsidev: Device to which we are issuing command
585 * @arg: User provided data for issuing command
588 * Defined by the SCSI layer. We don't really care.
591 * Zero on success, negative errno on error.
593 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
596 u8 scsi_cmd[MAX_COMMAND_SIZE];
597 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
599 enum dma_data_direction data_dir;
605 if (copy_from_user(args, arg, sizeof(args)))
608 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
612 memset(scsi_cmd, 0, sizeof(scsi_cmd));
615 argsize = ATA_SECT_SIZE * args[3];
616 argbuf = kmalloc(argsize, GFP_KERNEL);
617 if (argbuf == NULL) {
622 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
623 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
624 block count in sector count field */
625 data_dir = DMA_FROM_DEVICE;
627 scsi_cmd[1] = (3 << 1); /* Non-data */
628 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
632 scsi_cmd[0] = ATA_16;
634 scsi_cmd[4] = args[2];
635 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
636 scsi_cmd[6] = args[3];
637 scsi_cmd[8] = args[1];
641 scsi_cmd[6] = args[1];
643 scsi_cmd[14] = args[0];
645 /* Good values for timeout and retries? Values below
646 from scsi_ioctl_send_command() for default case... */
647 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
648 sensebuf, (10*HZ), 5, 0, NULL);
650 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
651 u8 *desc = sensebuf + 8;
652 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
654 /* If we set cc then ATA pass-through will cause a
655 * check condition even if no error. Filter that. */
656 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
657 struct scsi_sense_hdr sshdr;
658 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
660 if (sshdr.sense_key == RECOVERED_ERROR &&
661 sshdr.asc == 0 && sshdr.ascq == 0x1d)
662 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
665 /* Send userspace a few ATA registers (same as drivers/ide) */
666 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
667 desc[0] == 0x09) { /* code is "ATA Descriptor" */
668 args[0] = desc[13]; /* status */
669 args[1] = desc[3]; /* error */
670 args[2] = desc[5]; /* sector count (0:7) */
671 if (copy_to_user(arg, args, sizeof(args)))
683 && copy_to_user(arg + sizeof(args), argbuf, argsize))
692 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
693 * @scsidev: Device to which we are issuing command
694 * @arg: User provided data for issuing command
697 * Defined by the SCSI layer. We don't really care.
700 * Zero on success, negative errno on error.
702 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
705 u8 scsi_cmd[MAX_COMMAND_SIZE];
706 u8 args[7], *sensebuf = NULL;
712 if (copy_from_user(args, arg, sizeof(args)))
715 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
719 memset(scsi_cmd, 0, sizeof(scsi_cmd));
720 scsi_cmd[0] = ATA_16;
721 scsi_cmd[1] = (3 << 1); /* Non-data */
722 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
723 scsi_cmd[4] = args[1];
724 scsi_cmd[6] = args[2];
725 scsi_cmd[8] = args[3];
726 scsi_cmd[10] = args[4];
727 scsi_cmd[12] = args[5];
728 scsi_cmd[13] = args[6] & 0x4f;
729 scsi_cmd[14] = args[0];
731 /* Good values for timeout and retries? Values below
732 from scsi_ioctl_send_command() for default case... */
733 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
734 sensebuf, (10*HZ), 5, 0, NULL);
736 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
737 u8 *desc = sensebuf + 8;
738 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
740 /* If we set cc then ATA pass-through will cause a
741 * check condition even if no error. Filter that. */
742 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
743 struct scsi_sense_hdr sshdr;
744 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
746 if (sshdr.sense_key == RECOVERED_ERROR &&
747 sshdr.asc == 0 && sshdr.ascq == 0x1d)
748 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
751 /* Send userspace ATA registers */
752 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
753 desc[0] == 0x09) {/* code is "ATA Descriptor" */
754 args[0] = desc[13]; /* status */
755 args[1] = desc[3]; /* error */
756 args[2] = desc[5]; /* sector count (0:7) */
757 args[3] = desc[7]; /* lbal */
758 args[4] = desc[9]; /* lbam */
759 args[5] = desc[11]; /* lbah */
760 args[6] = desc[12]; /* select */
761 if (copy_to_user(arg, args, sizeof(args)))
776 static int ata_ioc32(struct ata_port *ap)
778 if (ap->flags & ATA_FLAG_PIO_DMA)
780 if (ap->pflags & ATA_PFLAG_PIO32)
785 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
786 int cmd, void __user *arg)
794 spin_lock_irqsave(ap->lock, flags);
796 spin_unlock_irqrestore(ap->lock, flags);
797 return put_user(val, (unsigned long __user *)arg);
800 val = (unsigned long) arg;
802 spin_lock_irqsave(ap->lock, flags);
803 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
805 ap->pflags |= ATA_PFLAG_PIO32;
807 ap->pflags &= ~ATA_PFLAG_PIO32;
809 if (val != ata_ioc32(ap))
812 spin_unlock_irqrestore(ap->lock, flags);
815 case HDIO_GET_IDENTITY:
816 return ata_get_identity(ap, scsidev, arg);
819 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
821 return ata_cmd_ioctl(scsidev, arg);
823 case HDIO_DRIVE_TASK:
824 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
826 return ata_task_ioctl(scsidev, arg);
835 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
837 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
839 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
842 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
845 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
846 * @dev: ATA device to which the new command is attached
847 * @cmd: SCSI command that originated this ATA command
849 * Obtain a reference to an unused ata_queued_cmd structure,
850 * which is the basic libata structure representing a single
851 * ATA command sent to the hardware.
853 * If a command was available, fill in the SCSI-specific
854 * portions of the structure with information on the
858 * spin_lock_irqsave(host lock)
861 * Command allocated, or %NULL if none available.
863 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
864 struct scsi_cmnd *cmd)
866 struct ata_queued_cmd *qc;
868 qc = ata_qc_new_init(dev, cmd->request->tag);
871 qc->scsidone = cmd->scsi_done;
873 qc->sg = scsi_sglist(cmd);
874 qc->n_elem = scsi_sg_count(cmd);
876 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
883 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
885 struct scsi_cmnd *scmd = qc->scsicmd;
887 qc->extrabytes = scmd->request->extra_len;
888 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
892 * ata_dump_status - user friendly display of error info
893 * @id: id of the port in question
894 * @tf: ptr to filled out taskfile
896 * Decode and dump the ATA error/status registers for the user so
897 * that they have some idea what really happened at the non
898 * make-believe layer.
901 * inherited from caller
903 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
905 u8 stat = tf->command, err = tf->feature;
907 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
908 if (stat & ATA_BUSY) {
909 printk("Busy }\n"); /* Data is not valid in this case */
911 if (stat & ATA_DRDY) printk("DriveReady ");
912 if (stat & ATA_DF) printk("DeviceFault ");
913 if (stat & ATA_DSC) printk("SeekComplete ");
914 if (stat & ATA_DRQ) printk("DataRequest ");
915 if (stat & ATA_CORR) printk("CorrectedError ");
916 if (stat & ATA_SENSE) printk("Sense ");
917 if (stat & ATA_ERR) printk("Error ");
921 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
922 if (err & ATA_ABORTED) printk("DriveStatusError ");
923 if (err & ATA_ICRC) {
924 if (err & ATA_ABORTED)
926 else printk("Sector ");
928 if (err & ATA_UNC) printk("UncorrectableError ");
929 if (err & ATA_IDNF) printk("SectorIdNotFound ");
930 if (err & ATA_TRK0NF) printk("TrackZeroNotFound ");
931 if (err & ATA_AMNF) printk("AddrMarkNotFound ");
938 * ata_to_sense_error - convert ATA error to SCSI error
939 * @id: ATA device number
940 * @drv_stat: value contained in ATA status register
941 * @drv_err: value contained in ATA error register
942 * @sk: the sense key we'll fill out
943 * @asc: the additional sense code we'll fill out
944 * @ascq: the additional sense code qualifier we'll fill out
945 * @verbose: be verbose
947 * Converts an ATA error into a SCSI error. Fill out pointers to
948 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
949 * format sense blocks.
952 * spin_lock_irqsave(host lock)
954 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
955 u8 *asc, u8 *ascq, int verbose)
959 /* Based on the 3ware driver translation table */
960 static const unsigned char sense_table[][4] = {
962 {0xd1, ABORTED_COMMAND, 0x00, 0x00},
963 // Device busy Aborted command
965 {0xd0, ABORTED_COMMAND, 0x00, 0x00},
966 // Device busy Aborted command
968 {0x61, HARDWARE_ERROR, 0x00, 0x00},
969 // Device fault Hardware error
970 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
971 {0x84, ABORTED_COMMAND, 0x47, 0x00},
972 // Data CRC error SCSI parity error
973 /* MC|ID|ABRT|TRK0|MARK */
974 {0x37, NOT_READY, 0x04, 0x00},
975 // Unit offline Not ready
977 {0x09, NOT_READY, 0x04, 0x00},
978 // Unrecovered disk error Not ready
979 /* Bad address mark */
980 {0x01, MEDIUM_ERROR, 0x13, 0x00},
981 // Address mark not found for data field
982 /* TRK0 - Track 0 not found */
983 {0x02, HARDWARE_ERROR, 0x00, 0x00},
985 /* Abort: 0x04 is not translated here, see below */
986 /* Media change request */
987 {0x08, NOT_READY, 0x04, 0x00},
988 // FIXME: faking offline
989 /* SRV/IDNF - ID not found */
990 {0x10, ILLEGAL_REQUEST, 0x21, 0x00},
991 // Logical address out of range
992 /* MC - Media Changed */
993 {0x20, UNIT_ATTENTION, 0x28, 0x00},
994 // Not ready to ready change, medium may have changed
995 /* ECC - Uncorrectable ECC error */
996 {0x40, MEDIUM_ERROR, 0x11, 0x04},
997 // Unrecovered read error
998 /* BBD - block marked bad */
999 {0x80, MEDIUM_ERROR, 0x11, 0x04},
1000 // Block marked bad Medium error, unrecovered read error
1001 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1003 static const unsigned char stat_table[][4] = {
1004 /* Must be first because BUSY means no other bits valid */
1005 {0x80, ABORTED_COMMAND, 0x47, 0x00},
1006 // Busy, fake parity for now
1007 {0x40, ILLEGAL_REQUEST, 0x21, 0x04},
1008 // Device ready, unaligned write command
1009 {0x20, HARDWARE_ERROR, 0x44, 0x00},
1010 // Device fault, internal target failure
1011 {0x08, ABORTED_COMMAND, 0x47, 0x00},
1012 // Timed out in xfer, fake parity for now
1013 {0x04, RECOVERED_ERROR, 0x11, 0x00},
1014 // Recovered ECC error Medium error, recovered
1015 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1019 * Is this an error we can process/parse
1021 if (drv_stat & ATA_BUSY) {
1022 drv_err = 0; /* Ignore the err bits, they're invalid */
1026 /* Look for drv_err */
1027 for (i = 0; sense_table[i][0] != 0xFF; i++) {
1028 /* Look for best matches first */
1029 if ((sense_table[i][0] & drv_err) ==
1030 sense_table[i][0]) {
1031 *sk = sense_table[i][1];
1032 *asc = sense_table[i][2];
1033 *ascq = sense_table[i][3];
1034 goto translate_done;
1040 * Fall back to interpreting status bits. Note that if the drv_err
1041 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
1042 * is not descriptive enough.
1044 for (i = 0; stat_table[i][0] != 0xFF; i++) {
1045 if (stat_table[i][0] & drv_stat) {
1046 *sk = stat_table[i][1];
1047 *asc = stat_table[i][2];
1048 *ascq = stat_table[i][3];
1049 goto translate_done;
1054 * We need a sensible error return here, which is tricky, and one
1055 * that won't cause people to do things like return a disk wrongly.
1057 *sk = ABORTED_COMMAND;
1063 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
1064 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
1065 id, drv_stat, drv_err, *sk, *asc, *ascq);
1070 * ata_gen_passthru_sense - Generate check condition sense block.
1071 * @qc: Command that completed.
1073 * This function is specific to the ATA descriptor format sense
1074 * block specified for the ATA pass through commands. Regardless
1075 * of whether the command errored or not, return a sense
1076 * block. Copy all controller registers into the sense
1077 * block. If there was no error, we get the request from an ATA
1078 * passthrough command, so we use the following sense data:
1079 * sk = RECOVERED ERROR
1080 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1086 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
1088 struct scsi_cmnd *cmd = qc->scsicmd;
1089 struct ata_taskfile *tf = &qc->result_tf;
1090 unsigned char *sb = cmd->sense_buffer;
1091 unsigned char *desc = sb + 8;
1092 int verbose = qc->ap->ops->error_handler == NULL;
1093 u8 sense_key, asc, ascq;
1095 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1097 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1100 * Use ata_to_sense_error() to map status register bits
1101 * onto sense key, asc & ascq.
1104 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1105 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1106 &sense_key, &asc, &ascq, verbose);
1107 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq);
1110 * ATA PASS-THROUGH INFORMATION AVAILABLE
1111 * Always in descriptor format sense.
1113 scsi_build_sense_buffer(1, cmd->sense_buffer,
1114 RECOVERED_ERROR, 0, 0x1D);
1117 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) {
1120 /* descriptor format */
1122 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9);
1124 if (SCSI_SENSE_BUFFERSIZE < len + 14)
1127 desc = sb + 8 + len;
1132 * Copy registers into sense buffer.
1135 desc[3] = tf->feature; /* == error reg */
1136 desc[5] = tf->nsect;
1139 desc[11] = tf->lbah;
1140 desc[12] = tf->device;
1141 desc[13] = tf->command; /* == status reg */
1144 * Fill in Extend bit, and the high order bytes
1147 if (tf->flags & ATA_TFLAG_LBA48) {
1149 desc[4] = tf->hob_nsect;
1150 desc[6] = tf->hob_lbal;
1151 desc[8] = tf->hob_lbam;
1152 desc[10] = tf->hob_lbah;
1155 /* Fixed sense format */
1156 desc[0] = tf->feature;
1157 desc[1] = tf->command; /* status */
1158 desc[2] = tf->device;
1159 desc[3] = tf->nsect;
1161 if (tf->flags & ATA_TFLAG_LBA48) {
1165 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah)
1169 desc[10] = tf->lbam;
1170 desc[11] = tf->lbah;
1175 * ata_gen_ata_sense - generate a SCSI fixed sense block
1176 * @qc: Command that we are erroring out
1178 * Generate sense block for a failed ATA command @qc. Descriptor
1179 * format is used to accommodate LBA48 block address.
1184 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1186 struct ata_device *dev = qc->dev;
1187 struct scsi_cmnd *cmd = qc->scsicmd;
1188 struct ata_taskfile *tf = &qc->result_tf;
1189 unsigned char *sb = cmd->sense_buffer;
1190 int verbose = qc->ap->ops->error_handler == NULL;
1192 u8 sense_key, asc, ascq;
1194 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1196 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1198 if (ata_dev_disabled(dev)) {
1199 /* Device disabled after error recovery */
1200 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
1201 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21);
1204 /* Use ata_to_sense_error() to map status register bits
1205 * onto sense key, asc & ascq.
1208 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1209 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1210 &sense_key, &asc, &ascq, verbose);
1211 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq);
1213 /* Could not decode error */
1214 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n",
1215 tf->command, qc->err_mask);
1216 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0);
1220 block = ata_tf_read_block(&qc->result_tf, dev);
1221 if (block == U64_MAX)
1224 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block);
1227 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1229 sdev->use_10_for_rw = 1;
1230 sdev->use_10_for_ms = 1;
1231 sdev->no_write_same = 1;
1233 /* Schedule policy is determined by ->qc_defer() callback and
1234 * it needs to see every deferred qc. Set dev_blocked to 1 to
1235 * prevent SCSI midlayer from automatically deferring
1238 sdev->max_device_blocked = 1;
1242 * atapi_drain_needed - Check whether data transfer may overflow
1243 * @rq: request to be checked
1245 * ATAPI commands which transfer variable length data to host
1246 * might overflow due to application error or hardware bug. This
1247 * function checks whether overflow should be drained and ignored
1254 * 1 if ; otherwise, 0.
1256 static int atapi_drain_needed(struct request *rq)
1258 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
1261 if (!blk_rq_bytes(rq) || op_is_write(req_op(rq)))
1264 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1267 static int ata_scsi_dev_config(struct scsi_device *sdev,
1268 struct ata_device *dev)
1270 struct request_queue *q = sdev->request_queue;
1272 if (!ata_id_has_unload(dev->id))
1273 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1275 /* configure max sectors */
1276 blk_queue_max_hw_sectors(q, dev->max_sectors);
1278 if (dev->class == ATA_DEV_ATAPI) {
1281 sdev->sector_size = ATA_SECT_SIZE;
1283 /* set DMA padding */
1284 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1286 /* configure draining */
1287 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1289 ata_dev_err(dev, "drain buffer allocation failed\n");
1293 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1295 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1296 sdev->manage_start_stop = 1;
1300 * ata_pio_sectors() expects buffer for each sector to not cross
1301 * page boundary. Enforce it by requiring buffers to be sector
1302 * aligned, which works iff sector_size is not larger than
1303 * PAGE_SIZE. ATAPI devices also need the alignment as
1304 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1306 if (sdev->sector_size > PAGE_SIZE)
1308 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1311 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1313 if (dev->flags & ATA_DFLAG_AN)
1314 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1316 if (dev->flags & ATA_DFLAG_NCQ) {
1319 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1320 depth = min(ATA_MAX_QUEUE - 1, depth);
1321 scsi_change_queue_depth(sdev, depth);
1324 blk_queue_flush_queueable(q, false);
1331 * ata_scsi_slave_config - Set SCSI device attributes
1332 * @sdev: SCSI device to examine
1334 * This is called before we actually start reading
1335 * and writing to the device, to configure certain
1336 * SCSI mid-layer behaviors.
1339 * Defined by SCSI layer. We don't really care.
1342 int ata_scsi_slave_config(struct scsi_device *sdev)
1344 struct ata_port *ap = ata_shost_to_port(sdev->host);
1345 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1348 ata_scsi_sdev_config(sdev);
1351 rc = ata_scsi_dev_config(sdev, dev);
1357 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1358 * @sdev: SCSI device to be destroyed
1360 * @sdev is about to be destroyed for hot/warm unplugging. If
1361 * this unplugging was initiated by libata as indicated by NULL
1362 * dev->sdev, this function doesn't have to do anything.
1363 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1364 * Clear dev->sdev, schedule the device for ATA detach and invoke
1368 * Defined by SCSI layer. We don't really care.
1370 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1372 struct ata_port *ap = ata_shost_to_port(sdev->host);
1373 struct request_queue *q = sdev->request_queue;
1374 unsigned long flags;
1375 struct ata_device *dev;
1377 if (!ap->ops->error_handler)
1380 spin_lock_irqsave(ap->lock, flags);
1381 dev = __ata_scsi_find_dev(ap, sdev);
1382 if (dev && dev->sdev) {
1383 /* SCSI device already in CANCEL state, no need to offline it */
1385 dev->flags |= ATA_DFLAG_DETACH;
1386 ata_port_schedule_eh(ap);
1388 spin_unlock_irqrestore(ap->lock, flags);
1390 kfree(q->dma_drain_buffer);
1391 q->dma_drain_buffer = NULL;
1392 q->dma_drain_size = 0;
1396 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1397 * @ap: ATA port to which the device change the queue depth
1398 * @sdev: SCSI device to configure queue depth for
1399 * @queue_depth: new queue depth
1401 * libsas and libata have different approaches for associating a sdev to
1405 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1408 struct ata_device *dev;
1409 unsigned long flags;
1411 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1412 return sdev->queue_depth;
1414 dev = ata_scsi_find_dev(ap, sdev);
1415 if (!dev || !ata_dev_enabled(dev))
1416 return sdev->queue_depth;
1419 spin_lock_irqsave(ap->lock, flags);
1420 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1421 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1422 dev->flags |= ATA_DFLAG_NCQ_OFF;
1425 spin_unlock_irqrestore(ap->lock, flags);
1427 /* limit and apply queue depth */
1428 queue_depth = min(queue_depth, sdev->host->can_queue);
1429 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1430 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1432 if (sdev->queue_depth == queue_depth)
1435 return scsi_change_queue_depth(sdev, queue_depth);
1439 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1440 * @sdev: SCSI device to configure queue depth for
1441 * @queue_depth: new queue depth
1443 * This is libata standard hostt->change_queue_depth callback.
1444 * SCSI will call into this callback when user tries to set queue
1448 * SCSI layer (we don't care)
1451 * Newly configured queue depth.
1453 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1455 struct ata_port *ap = ata_shost_to_port(sdev->host);
1457 return __ata_change_queue_depth(ap, sdev, queue_depth);
1461 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1462 * @qc: Storage for translated ATA taskfile
1464 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1465 * (to start). Perhaps these commands should be preceded by
1466 * CHECK POWER MODE to see what power mode the device is already in.
1467 * [See SAT revision 5 at www.t10.org]
1470 * spin_lock_irqsave(host lock)
1473 * Zero on success, non-zero on error.
1475 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1477 struct scsi_cmnd *scmd = qc->scsicmd;
1478 struct ata_taskfile *tf = &qc->tf;
1479 const u8 *cdb = scmd->cmnd;
1483 if (scmd->cmd_len < 5) {
1488 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1489 tf->protocol = ATA_PROT_NODATA;
1491 ; /* ignore IMMED bit, violates sat-r05 */
1496 goto invalid_fld; /* LOEJ bit set not supported */
1498 if (((cdb[4] >> 4) & 0xf) != 0) {
1501 goto invalid_fld; /* power conditions not supported */
1505 tf->nsect = 1; /* 1 sector, lba=0 */
1507 if (qc->dev->flags & ATA_DFLAG_LBA) {
1508 tf->flags |= ATA_TFLAG_LBA;
1513 tf->device |= ATA_LBA;
1516 tf->lbal = 0x1; /* sect */
1517 tf->lbam = 0x0; /* cyl low */
1518 tf->lbah = 0x0; /* cyl high */
1521 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1523 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1524 * or S5) causing some drives to spin up and down again.
1526 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1527 system_state == SYSTEM_POWER_OFF)
1530 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1531 system_entering_hibernation())
1534 /* Issue ATA STANDBY IMMEDIATE command */
1535 tf->command = ATA_CMD_STANDBYNOW1;
1539 * Standby and Idle condition timers could be implemented but that
1540 * would require libata to implement the Power condition mode page
1541 * and allow the user to change it. Changing mode pages requires
1542 * MODE SELECT to be implemented.
1548 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
1551 scmd->result = SAM_STAT_GOOD;
1557 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1558 * @qc: Storage for translated ATA taskfile
1560 * Sets up an ATA taskfile to issue FLUSH CACHE or
1564 * spin_lock_irqsave(host lock)
1567 * Zero on success, non-zero on error.
1569 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1571 struct ata_taskfile *tf = &qc->tf;
1573 tf->flags |= ATA_TFLAG_DEVICE;
1574 tf->protocol = ATA_PROT_NODATA;
1576 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1577 tf->command = ATA_CMD_FLUSH_EXT;
1579 tf->command = ATA_CMD_FLUSH;
1581 /* flush is critical for IO integrity, consider it an IO command */
1582 qc->flags |= ATA_QCFLAG_IO;
1588 * scsi_6_lba_len - Get LBA and transfer length
1589 * @cdb: SCSI command to translate
1591 * Calculate LBA and transfer length for 6-byte commands.
1595 * @plen: the transfer length
1597 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1602 VPRINTK("six-byte command\n");
1604 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1605 lba |= ((u64)cdb[2]) << 8;
1606 lba |= ((u64)cdb[3]);
1615 * scsi_10_lba_len - Get LBA and transfer length
1616 * @cdb: SCSI command to translate
1618 * Calculate LBA and transfer length for 10-byte commands.
1622 * @plen: the transfer length
1624 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1629 VPRINTK("ten-byte command\n");
1631 lba |= ((u64)cdb[2]) << 24;
1632 lba |= ((u64)cdb[3]) << 16;
1633 lba |= ((u64)cdb[4]) << 8;
1634 lba |= ((u64)cdb[5]);
1636 len |= ((u32)cdb[7]) << 8;
1637 len |= ((u32)cdb[8]);
1644 * scsi_16_lba_len - Get LBA and transfer length
1645 * @cdb: SCSI command to translate
1647 * Calculate LBA and transfer length for 16-byte commands.
1651 * @plen: the transfer length
1653 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1658 VPRINTK("sixteen-byte command\n");
1660 lba |= ((u64)cdb[2]) << 56;
1661 lba |= ((u64)cdb[3]) << 48;
1662 lba |= ((u64)cdb[4]) << 40;
1663 lba |= ((u64)cdb[5]) << 32;
1664 lba |= ((u64)cdb[6]) << 24;
1665 lba |= ((u64)cdb[7]) << 16;
1666 lba |= ((u64)cdb[8]) << 8;
1667 lba |= ((u64)cdb[9]);
1669 len |= ((u32)cdb[10]) << 24;
1670 len |= ((u32)cdb[11]) << 16;
1671 len |= ((u32)cdb[12]) << 8;
1672 len |= ((u32)cdb[13]);
1679 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1680 * @qc: Storage for translated ATA taskfile
1682 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1685 * spin_lock_irqsave(host lock)
1688 * Zero on success, non-zero on error.
1690 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1692 struct scsi_cmnd *scmd = qc->scsicmd;
1693 struct ata_taskfile *tf = &qc->tf;
1694 struct ata_device *dev = qc->dev;
1695 u64 dev_sectors = qc->dev->n_sectors;
1696 const u8 *cdb = scmd->cmnd;
1701 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1702 tf->protocol = ATA_PROT_NODATA;
1704 if (cdb[0] == VERIFY) {
1705 if (scmd->cmd_len < 10) {
1709 scsi_10_lba_len(cdb, &block, &n_block);
1710 } else if (cdb[0] == VERIFY_16) {
1711 if (scmd->cmd_len < 16) {
1715 scsi_16_lba_len(cdb, &block, &n_block);
1723 if (block >= dev_sectors)
1725 if ((block + n_block) > dev_sectors)
1728 if (dev->flags & ATA_DFLAG_LBA) {
1729 tf->flags |= ATA_TFLAG_LBA;
1731 if (lba_28_ok(block, n_block)) {
1733 tf->command = ATA_CMD_VERIFY;
1734 tf->device |= (block >> 24) & 0xf;
1735 } else if (lba_48_ok(block, n_block)) {
1736 if (!(dev->flags & ATA_DFLAG_LBA48))
1740 tf->flags |= ATA_TFLAG_LBA48;
1741 tf->command = ATA_CMD_VERIFY_EXT;
1743 tf->hob_nsect = (n_block >> 8) & 0xff;
1745 tf->hob_lbah = (block >> 40) & 0xff;
1746 tf->hob_lbam = (block >> 32) & 0xff;
1747 tf->hob_lbal = (block >> 24) & 0xff;
1749 /* request too large even for LBA48 */
1752 tf->nsect = n_block & 0xff;
1754 tf->lbah = (block >> 16) & 0xff;
1755 tf->lbam = (block >> 8) & 0xff;
1756 tf->lbal = block & 0xff;
1758 tf->device |= ATA_LBA;
1761 u32 sect, head, cyl, track;
1763 if (!lba_28_ok(block, n_block))
1766 /* Convert LBA to CHS */
1767 track = (u32)block / dev->sectors;
1768 cyl = track / dev->heads;
1769 head = track % dev->heads;
1770 sect = (u32)block % dev->sectors + 1;
1772 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1773 (u32)block, track, cyl, head, sect);
1775 /* Check whether the converted CHS can fit.
1779 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1782 tf->command = ATA_CMD_VERIFY;
1783 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1786 tf->lbah = cyl >> 8;
1793 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1797 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1798 /* "Logical Block Address out of range" */
1802 scmd->result = SAM_STAT_GOOD;
1807 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1808 * @qc: Storage for translated ATA taskfile
1810 * Converts any of six SCSI read/write commands into the
1811 * ATA counterpart, including starting sector (LBA),
1812 * sector count, and taking into account the device's LBA48
1815 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1816 * %WRITE_16 are currently supported.
1819 * spin_lock_irqsave(host lock)
1822 * Zero on success, non-zero on error.
1824 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1826 struct scsi_cmnd *scmd = qc->scsicmd;
1827 const u8 *cdb = scmd->cmnd;
1828 struct request *rq = scmd->request;
1829 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
1830 unsigned int tf_flags = 0;
1836 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1837 tf_flags |= ATA_TFLAG_WRITE;
1839 /* Calculate the SCSI LBA, transfer length and FUA. */
1843 if (unlikely(scmd->cmd_len < 10)) {
1847 scsi_10_lba_len(cdb, &block, &n_block);
1848 if (cdb[1] & (1 << 3))
1849 tf_flags |= ATA_TFLAG_FUA;
1853 if (unlikely(scmd->cmd_len < 6)) {
1857 scsi_6_lba_len(cdb, &block, &n_block);
1859 /* for 6-byte r/w commands, transfer length 0
1860 * means 256 blocks of data, not 0 block.
1867 if (unlikely(scmd->cmd_len < 16)) {
1871 scsi_16_lba_len(cdb, &block, &n_block);
1872 if (cdb[1] & (1 << 3))
1873 tf_flags |= ATA_TFLAG_FUA;
1876 DPRINTK("no-byte command\n");
1881 /* Check and compose ATA command */
1883 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1884 * length 0 means transfer 0 block of data.
1885 * However, for ATA R/W commands, sector count 0 means
1886 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1888 * WARNING: one or two older ATA drives treat 0 as 0...
1892 qc->flags |= ATA_QCFLAG_IO;
1893 qc->nbytes = n_block * scmd->device->sector_size;
1895 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1898 if (likely(rc == 0))
1903 /* treat all other errors as -EINVAL, fall through */
1905 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1909 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1910 /* "Logical Block Address out of range" */
1914 scmd->result = SAM_STAT_GOOD;
1918 static void ata_qc_done(struct ata_queued_cmd *qc)
1920 struct scsi_cmnd *cmd = qc->scsicmd;
1921 void (*done)(struct scsi_cmnd *) = qc->scsidone;
1927 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1929 struct ata_port *ap = qc->ap;
1930 struct scsi_cmnd *cmd = qc->scsicmd;
1931 u8 *cdb = cmd->cmnd;
1932 int need_sense = (qc->err_mask != 0);
1934 /* For ATA pass thru (SAT) commands, generate a sense block if
1935 * user mandated it or if there's an error. Note that if we
1936 * generate because the user forced us to [CK_COND =1], a check
1937 * condition is generated and the ATA register values are returned
1938 * whether the command completed successfully or not. If there
1939 * was no error, we use the following sense data:
1940 * sk = RECOVERED ERROR
1941 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1943 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1944 ((cdb[2] & 0x20) || need_sense))
1945 ata_gen_passthru_sense(qc);
1946 else if (qc->flags & ATA_QCFLAG_SENSE_VALID)
1947 cmd->result = SAM_STAT_CHECK_CONDITION;
1948 else if (need_sense)
1949 ata_gen_ata_sense(qc);
1951 cmd->result = SAM_STAT_GOOD;
1953 if (need_sense && !ap->ops->error_handler)
1954 ata_dump_status(ap->print_id, &qc->result_tf);
1960 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1961 * @dev: ATA device to which the command is addressed
1962 * @cmd: SCSI command to execute
1963 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1965 * Our ->queuecommand() function has decided that the SCSI
1966 * command issued can be directly translated into an ATA
1967 * command, rather than handled internally.
1969 * This function sets up an ata_queued_cmd structure for the
1970 * SCSI command, and sends that ata_queued_cmd to the hardware.
1972 * The xlat_func argument (actor) returns 0 if ready to execute
1973 * ATA command, else 1 to finish translation. If 1 is returned
1974 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1975 * to be set reflecting an error condition or clean (early)
1979 * spin_lock_irqsave(host lock)
1982 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1983 * needs to be deferred.
1985 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1986 ata_xlat_func_t xlat_func)
1988 struct ata_port *ap = dev->link->ap;
1989 struct ata_queued_cmd *qc;
1994 qc = ata_scsi_qc_new(dev, cmd);
1998 /* data is present; dma-map it */
1999 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
2000 cmd->sc_data_direction == DMA_TO_DEVICE) {
2001 if (unlikely(scsi_bufflen(cmd) < 1)) {
2002 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
2006 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
2008 qc->dma_dir = cmd->sc_data_direction;
2011 qc->complete_fn = ata_scsi_qc_complete;
2016 if (ap->ops->qc_defer) {
2017 if ((rc = ap->ops->qc_defer(qc)))
2021 /* select device, send command to hardware */
2029 cmd->scsi_done(cmd);
2030 DPRINTK("EXIT - early finish (good or error)\n");
2035 cmd->result = (DID_ERROR << 16);
2036 cmd->scsi_done(cmd);
2038 DPRINTK("EXIT - internal\n");
2043 DPRINTK("EXIT - defer\n");
2044 if (rc == ATA_DEFER_LINK)
2045 return SCSI_MLQUEUE_DEVICE_BUSY;
2047 return SCSI_MLQUEUE_HOST_BUSY;
2050 struct ata_scsi_args {
2051 struct ata_device *dev;
2053 struct scsi_cmnd *cmd;
2057 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
2058 * @args: device IDENTIFY data / SCSI command of interest.
2059 * @actor: Callback hook for desired SCSI command simulator
2061 * Takes care of the hard work of simulating a SCSI command...
2062 * Mapping the response buffer, calling the command's handler,
2063 * and handling the handler's return value. This return value
2064 * indicates whether the handler wishes the SCSI command to be
2065 * completed successfully (0), or not (in which case cmd->result
2066 * and sense buffer are assumed to be set).
2069 * spin_lock_irqsave(host lock)
2071 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
2072 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
2074 struct scsi_cmnd *cmd = args->cmd;
2077 buf = kzalloc(ATA_SCSI_RBUF_SIZE, GFP_NOIO);
2079 ata_scsi_set_sense(args->dev, cmd, NOT_READY, 0x08, 0);
2083 if (actor(args, buf) == 0) {
2084 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2085 buf, ATA_SCSI_RBUF_SIZE);
2086 cmd->result = SAM_STAT_GOOD;
2093 * ata_scsiop_inq_std - Simulate INQUIRY command
2094 * @args: device IDENTIFY data / SCSI command of interest.
2095 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2097 * Returns standard device identification data associated
2098 * with non-VPD INQUIRY command output.
2101 * spin_lock_irqsave(host lock)
2103 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
2105 const u8 versions[] = {
2107 0x60, /* SAM-3 (no version claimed) */
2110 0x20, /* SBC-2 (no version claimed) */
2113 0x00 /* SPC-3 (no version claimed) */
2115 const u8 versions_zbc[] = {
2117 0xA0, /* SAM-5 (no version claimed) */
2120 0x00, /* SBC-4 (no version claimed) */
2123 0xC0, /* SPC-5 (no version claimed) */
2132 0x5, /* claim SPC-3 version compatibility */
2142 /* set scsi removable (RMB) bit per ata bit, or if the
2143 * AHCI port says it's external (Hotplug-capable, eSATA).
2145 if (ata_id_removable(args->id) ||
2146 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL))
2149 if (args->dev->class == ATA_DEV_ZAC) {
2151 hdr[2] = 0x7; /* claim SPC-5 version compatibility */
2154 memcpy(rbuf, hdr, sizeof(hdr));
2155 memcpy(&rbuf[8], "ATA ", 8);
2156 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
2158 /* From SAT, use last 2 words from fw rev unless they are spaces */
2159 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
2160 if (strncmp(&rbuf[32], " ", 4) == 0)
2161 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2163 if (rbuf[32] == 0 || rbuf[32] == ' ')
2164 memcpy(&rbuf[32], "n/a ", 4);
2166 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC)
2167 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc));
2169 memcpy(rbuf + 58, versions, sizeof(versions));
2175 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2176 * @args: device IDENTIFY data / SCSI command of interest.
2177 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2179 * Returns list of inquiry VPD pages available.
2182 * spin_lock_irqsave(host lock)
2184 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
2187 const u8 pages[] = {
2188 0x00, /* page 0x00, this page */
2189 0x80, /* page 0x80, unit serial no page */
2190 0x83, /* page 0x83, device ident page */
2191 0x89, /* page 0x89, ata info page */
2192 0xb0, /* page 0xb0, block limits page */
2193 0xb1, /* page 0xb1, block device characteristics page */
2194 0xb2, /* page 0xb2, thin provisioning page */
2195 0xb6, /* page 0xb6, zoned block device characteristics */
2198 num_pages = sizeof(pages);
2199 if (!(args->dev->flags & ATA_DFLAG_ZAC))
2201 rbuf[3] = num_pages; /* number of supported VPD pages */
2202 memcpy(rbuf + 4, pages, num_pages);
2207 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2208 * @args: device IDENTIFY data / SCSI command of interest.
2209 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2211 * Returns ATA device serial number.
2214 * spin_lock_irqsave(host lock)
2216 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2220 0x80, /* this page code */
2222 ATA_ID_SERNO_LEN, /* page len */
2225 memcpy(rbuf, hdr, sizeof(hdr));
2226 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2227 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2232 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2233 * @args: device IDENTIFY data / SCSI command of interest.
2234 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2236 * Yields two logical unit device identification designators:
2237 * - vendor specific ASCII containing the ATA serial number
2238 * - SAT defined "t10 vendor id based" containing ASCII vendor
2239 * name ("ATA "), model and serial numbers.
2242 * spin_lock_irqsave(host lock)
2244 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2246 const int sat_model_serial_desc_len = 68;
2249 rbuf[1] = 0x83; /* this page code */
2252 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2254 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2256 ata_id_string(args->id, (unsigned char *) rbuf + num,
2257 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2258 num += ATA_ID_SERNO_LEN;
2260 /* SAT defined lu model and serial numbers descriptor */
2261 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2264 rbuf[num + 3] = sat_model_serial_desc_len;
2266 memcpy(rbuf + num, "ATA ", 8);
2268 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2270 num += ATA_ID_PROD_LEN;
2271 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2273 num += ATA_ID_SERNO_LEN;
2275 if (ata_id_has_wwn(args->id)) {
2276 /* SAT defined lu world wide name */
2277 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2280 rbuf[num + 3] = ATA_ID_WWN_LEN;
2282 ata_id_string(args->id, (unsigned char *) rbuf + num,
2283 ATA_ID_WWN, ATA_ID_WWN_LEN);
2284 num += ATA_ID_WWN_LEN;
2286 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2291 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2292 * @args: device IDENTIFY data / SCSI command of interest.
2293 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2295 * Yields SAT-specified ATA VPD page.
2298 * spin_lock_irqsave(host lock)
2300 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2302 struct ata_taskfile tf;
2304 memset(&tf, 0, sizeof(tf));
2306 rbuf[1] = 0x89; /* our page code */
2307 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2308 rbuf[3] = (0x238 & 0xff);
2310 memcpy(&rbuf[8], "linux ", 8);
2311 memcpy(&rbuf[16], "libata ", 16);
2312 memcpy(&rbuf[32], DRV_VERSION, 4);
2314 /* we don't store the ATA device signature, so we fake it */
2316 tf.command = ATA_DRDY; /* really, this is Status reg */
2320 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2321 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2323 rbuf[56] = ATA_CMD_ID_ATA;
2325 memcpy(&rbuf[60], &args->id[0], 512);
2329 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2334 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2337 * Optimal transfer length granularity.
2339 * This is always one physical block, but for disks with a smaller
2340 * logical than physical sector size we need to figure out what the
2343 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2344 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2347 * Optimal unmap granularity.
2349 * The ATA spec doesn't even know about a granularity or alignment
2350 * for the TRIM command. We can leave away most of the unmap related
2351 * VPD page entries, but we have specifify a granularity to signal
2352 * that we support some form of unmap - in thise case via WRITE SAME
2353 * with the unmap bit set.
2355 if (ata_id_has_trim(args->id)) {
2356 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]);
2357 put_unaligned_be32(1, &rbuf[28]);
2363 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2365 int form_factor = ata_id_form_factor(args->id);
2366 int media_rotation_rate = ata_id_rotation_rate(args->id);
2367 u8 zoned = ata_id_zoned_cap(args->id);
2371 rbuf[4] = media_rotation_rate >> 8;
2372 rbuf[5] = media_rotation_rate;
2373 rbuf[7] = form_factor;
2375 rbuf[8] = (zoned << 4);
2380 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2382 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2385 rbuf[5] = 1 << 6; /* TPWS */
2390 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf)
2393 * zbc-r05 SCSI Zoned Block device characteristics VPD page
2399 * URSWRZ bit is only meaningful for host-managed ZAC drives
2401 if (args->dev->zac_zoned_cap & 1)
2403 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]);
2404 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]);
2405 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]);
2411 * modecpy - Prepare response for MODE SENSE
2412 * @dest: output buffer
2413 * @src: data being copied
2414 * @n: length of mode page
2415 * @changeable: whether changeable parameters are requested
2417 * Generate a generic MODE SENSE page for either current or changeable
2423 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2426 memcpy(dest, src, 2);
2427 memset(dest + 2, 0, n - 2);
2429 memcpy(dest, src, n);
2434 * ata_msense_caching - Simulate MODE SENSE caching info page
2435 * @id: device IDENTIFY data
2436 * @buf: output buffer
2437 * @changeable: whether changeable parameters are requested
2439 * Generate a caching info page, which conditionally indicates
2440 * write caching to the SCSI layer, depending on device
2446 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2448 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2450 buf[2] |= (1 << 2); /* ata_mselect_caching() */
2452 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */
2453 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */
2455 return sizeof(def_cache_mpage);
2459 * ata_msense_control - Simulate MODE SENSE control mode page
2460 * @dev: ATA device of interest
2461 * @buf: output buffer
2462 * @changeable: whether changeable parameters are requested
2464 * Generate a generic MODE SENSE control mode page.
2469 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf,
2472 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2474 buf[2] |= (1 << 2); /* ata_mselect_control() */
2476 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
2478 buf[2] |= (d_sense << 2); /* descriptor format sense data */
2480 return sizeof(def_control_mpage);
2484 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2485 * @buf: output buffer
2486 * @changeable: whether changeable parameters are requested
2488 * Generate a generic MODE SENSE r/w error recovery page.
2493 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2495 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2497 return sizeof(def_rw_recovery_mpage);
2501 * We can turn this into a real blacklist if it's needed, for now just
2502 * blacklist any Maxtor BANC1G10 revision firmware
2504 static int ata_dev_supports_fua(u16 *id)
2506 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2510 if (!ata_id_has_fua(id))
2513 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2514 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2516 if (strcmp(model, "Maxtor"))
2518 if (strcmp(fw, "BANC1G10"))
2521 return 0; /* blacklisted */
2525 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2526 * @args: device IDENTIFY data / SCSI command of interest.
2527 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2529 * Simulate MODE SENSE commands. Assume this is invoked for direct
2530 * access devices (e.g. disks) only. There should be no block
2531 * descriptor for other device types.
2534 * spin_lock_irqsave(host lock)
2536 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2538 struct ata_device *dev = args->dev;
2539 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2540 const u8 sat_blk_desc[] = {
2541 0, 0, 0, 0, /* number of blocks: sat unspecified */
2543 0, 0x2, 0x0 /* block length: 512 bytes */
2546 unsigned int ebd, page_control, six_byte;
2547 u8 dpofua, bp = 0xff;
2552 six_byte = (scsicmd[0] == MODE_SENSE);
2553 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2555 * LLBA bit in msense(10) ignored (compliant)
2558 page_control = scsicmd[2] >> 6;
2559 switch (page_control) {
2560 case 0: /* current */
2561 case 1: /* changeable */
2562 case 2: /* defaults */
2563 break; /* supported */
2565 goto saving_not_supp;
2573 p += 4 + (ebd ? 8 : 0);
2575 p += 8 + (ebd ? 8 : 0);
2577 pg = scsicmd[2] & 0x3f;
2580 * No mode subpages supported (yet) but asking for _all_
2581 * subpages may be valid
2583 if (spg && (spg != ALL_SUB_MPAGES)) {
2589 case RW_RECOVERY_MPAGE:
2590 p += ata_msense_rw_recovery(p, page_control == 1);
2594 p += ata_msense_caching(args->id, p, page_control == 1);
2598 p += ata_msense_control(args->dev, p, page_control == 1);
2602 p += ata_msense_rw_recovery(p, page_control == 1);
2603 p += ata_msense_caching(args->id, p, page_control == 1);
2604 p += ata_msense_control(args->dev, p, page_control == 1);
2607 default: /* invalid page code */
2613 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2614 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2618 rbuf[0] = p - rbuf - 1;
2621 rbuf[3] = sizeof(sat_blk_desc);
2622 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2625 unsigned int output_len = p - rbuf - 2;
2627 rbuf[0] = output_len >> 8;
2628 rbuf[1] = output_len;
2631 rbuf[7] = sizeof(sat_blk_desc);
2632 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2638 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp);
2642 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2643 /* "Saving parameters not supported" */
2648 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2649 * @args: device IDENTIFY data / SCSI command of interest.
2650 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2652 * Simulate READ CAPACITY commands.
2657 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2659 struct ata_device *dev = args->dev;
2660 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2661 u32 sector_size; /* physical sector size in bytes */
2665 sector_size = ata_id_logical_sector_size(dev->id);
2666 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2667 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2671 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2672 if (last_lba >= 0xffffffffULL)
2673 last_lba = 0xffffffff;
2675 /* sector count, 32-bit */
2676 rbuf[0] = last_lba >> (8 * 3);
2677 rbuf[1] = last_lba >> (8 * 2);
2678 rbuf[2] = last_lba >> (8 * 1);
2682 rbuf[4] = sector_size >> (8 * 3);
2683 rbuf[5] = sector_size >> (8 * 2);
2684 rbuf[6] = sector_size >> (8 * 1);
2685 rbuf[7] = sector_size;
2687 /* sector count, 64-bit */
2688 rbuf[0] = last_lba >> (8 * 7);
2689 rbuf[1] = last_lba >> (8 * 6);
2690 rbuf[2] = last_lba >> (8 * 5);
2691 rbuf[3] = last_lba >> (8 * 4);
2692 rbuf[4] = last_lba >> (8 * 3);
2693 rbuf[5] = last_lba >> (8 * 2);
2694 rbuf[6] = last_lba >> (8 * 1);
2698 rbuf[ 8] = sector_size >> (8 * 3);
2699 rbuf[ 9] = sector_size >> (8 * 2);
2700 rbuf[10] = sector_size >> (8 * 1);
2701 rbuf[11] = sector_size;
2704 rbuf[13] = log2_per_phys;
2705 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2706 rbuf[15] = lowest_aligned;
2708 if (ata_id_has_trim(args->id) &&
2709 !(dev->horkage & ATA_HORKAGE_NOTRIM)) {
2710 rbuf[14] |= 0x80; /* LBPME */
2712 if (ata_id_has_zero_after_trim(args->id) &&
2713 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) {
2714 ata_dev_info(dev, "Enabling discard_zeroes_data\n");
2715 rbuf[14] |= 0x40; /* LBPRZ */
2718 if (ata_id_zoned_cap(args->id) ||
2719 args->dev->class == ATA_DEV_ZAC)
2720 rbuf[12] = (1 << 4); /* RC_BASIS */
2726 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2727 * @args: device IDENTIFY data / SCSI command of interest.
2728 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2730 * Simulate REPORT LUNS command.
2733 * spin_lock_irqsave(host lock)
2735 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2738 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2743 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2745 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2746 /* FIXME: not quite right; we don't want the
2747 * translation of taskfile registers into
2748 * a sense descriptors, since that's only
2749 * correct for ATA, not ATAPI
2751 ata_gen_passthru_sense(qc);
2757 /* is it pointless to prefer PIO for "safety reasons"? */
2758 static inline int ata_pio_use_silly(struct ata_port *ap)
2760 return (ap->flags & ATA_FLAG_PIO_DMA);
2763 static void atapi_request_sense(struct ata_queued_cmd *qc)
2765 struct ata_port *ap = qc->ap;
2766 struct scsi_cmnd *cmd = qc->scsicmd;
2768 DPRINTK("ATAPI request sense\n");
2770 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2772 #ifdef CONFIG_ATA_SFF
2773 if (ap->ops->sff_tf_read)
2774 ap->ops->sff_tf_read(ap, &qc->tf);
2777 /* fill these in, for the case where they are -not- overwritten */
2778 cmd->sense_buffer[0] = 0x70;
2779 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2783 /* setup sg table and init transfer direction */
2784 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2785 ata_sg_init(qc, &qc->sgent, 1);
2786 qc->dma_dir = DMA_FROM_DEVICE;
2788 memset(&qc->cdb, 0, qc->dev->cdb_len);
2789 qc->cdb[0] = REQUEST_SENSE;
2790 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2792 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2793 qc->tf.command = ATA_CMD_PACKET;
2795 if (ata_pio_use_silly(ap)) {
2796 qc->tf.protocol = ATAPI_PROT_DMA;
2797 qc->tf.feature |= ATAPI_PKT_DMA;
2799 qc->tf.protocol = ATAPI_PROT_PIO;
2800 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2803 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2805 qc->complete_fn = atapi_sense_complete;
2813 * ATAPI devices typically report zero for their SCSI version, and sometimes
2814 * deviate from the spec WRT response data format. If SCSI version is
2815 * reported as zero like normal, then we make the following fixups:
2816 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a
2818 * 2) Ensure response data format / ATAPI information are always correct.
2820 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd)
2824 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2829 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2832 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2834 struct scsi_cmnd *cmd = qc->scsicmd;
2835 unsigned int err_mask = qc->err_mask;
2837 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2839 /* handle completion from new EH */
2840 if (unlikely(qc->ap->ops->error_handler &&
2841 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2843 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2844 /* FIXME: not quite right; we don't want the
2845 * translation of taskfile registers into a
2846 * sense descriptors, since that's only
2847 * correct for ATA, not ATAPI
2849 ata_gen_passthru_sense(qc);
2852 /* SCSI EH automatically locks door if sdev->locked is
2853 * set. Sometimes door lock request continues to
2854 * fail, for example, when no media is present. This
2855 * creates a loop - SCSI EH issues door lock which
2856 * fails and gets invoked again to acquire sense data
2857 * for the failed command.
2859 * If door lock fails, always clear sdev->locked to
2860 * avoid this infinite loop.
2862 * This may happen before SCSI scan is complete. Make
2863 * sure qc->dev->sdev isn't NULL before dereferencing.
2865 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2866 qc->dev->sdev->locked = 0;
2868 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2873 /* successful completion or old EH failure path */
2874 if (unlikely(err_mask & AC_ERR_DEV)) {
2875 cmd->result = SAM_STAT_CHECK_CONDITION;
2876 atapi_request_sense(qc);
2878 } else if (unlikely(err_mask)) {
2879 /* FIXME: not quite right; we don't want the
2880 * translation of taskfile registers into
2881 * a sense descriptors, since that's only
2882 * correct for ATA, not ATAPI
2884 ata_gen_passthru_sense(qc);
2886 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0)
2887 atapi_fixup_inquiry(cmd);
2888 cmd->result = SAM_STAT_GOOD;
2894 * atapi_xlat - Initialize PACKET taskfile
2895 * @qc: command structure to be initialized
2898 * spin_lock_irqsave(host lock)
2901 * Zero on success, non-zero on failure.
2903 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2905 struct scsi_cmnd *scmd = qc->scsicmd;
2906 struct ata_device *dev = qc->dev;
2907 int nodata = (scmd->sc_data_direction == DMA_NONE);
2908 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2909 unsigned int nbytes;
2911 memset(qc->cdb, 0, dev->cdb_len);
2912 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2914 qc->complete_fn = atapi_qc_complete;
2916 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2917 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2918 qc->tf.flags |= ATA_TFLAG_WRITE;
2919 DPRINTK("direction: write\n");
2922 qc->tf.command = ATA_CMD_PACKET;
2923 ata_qc_set_pc_nbytes(qc);
2925 /* check whether ATAPI DMA is safe */
2926 if (!nodata && !using_pio && atapi_check_dma(qc))
2929 /* Some controller variants snoop this value for Packet
2930 * transfers to do state machine and FIFO management. Thus we
2931 * want to set it properly, and for DMA where it is
2932 * effectively meaningless.
2934 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2936 /* Most ATAPI devices which honor transfer chunk size don't
2937 * behave according to the spec when odd chunk size which
2938 * matches the transfer length is specified. If the number of
2939 * bytes to transfer is 2n+1. According to the spec, what
2940 * should happen is to indicate that 2n+1 is going to be
2941 * transferred and transfer 2n+2 bytes where the last byte is
2944 * In practice, this doesn't happen. ATAPI devices first
2945 * indicate and transfer 2n bytes and then indicate and
2946 * transfer 2 bytes where the last byte is padding.
2948 * This inconsistency confuses several controllers which
2949 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2950 * These controllers use actual number of transferred bytes to
2951 * update DMA poitner and transfer of 4n+2 bytes make those
2952 * controller push DMA pointer by 4n+4 bytes because SATA data
2953 * FISes are aligned to 4 bytes. This causes data corruption
2954 * and buffer overrun.
2956 * Always setting nbytes to even number solves this problem
2957 * because then ATAPI devices don't have to split data at 2n
2963 qc->tf.lbam = (nbytes & 0xFF);
2964 qc->tf.lbah = (nbytes >> 8);
2967 qc->tf.protocol = ATAPI_PROT_NODATA;
2969 qc->tf.protocol = ATAPI_PROT_PIO;
2972 qc->tf.protocol = ATAPI_PROT_DMA;
2973 qc->tf.feature |= ATAPI_PKT_DMA;
2975 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2976 (scmd->sc_data_direction != DMA_TO_DEVICE))
2977 /* some SATA bridges need us to indicate data xfer direction */
2978 qc->tf.feature |= ATAPI_DMADIR;
2982 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2983 as ATAPI tape drives don't get this right otherwise */
2987 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2989 if (!sata_pmp_attached(ap)) {
2990 if (likely(devno < ata_link_max_devices(&ap->link)))
2991 return &ap->link.device[devno];
2993 if (likely(devno < ap->nr_pmp_links))
2994 return &ap->pmp_link[devno].device[0];
3000 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
3001 const struct scsi_device *scsidev)
3005 /* skip commands not addressed to targets we simulate */
3006 if (!sata_pmp_attached(ap)) {
3007 if (unlikely(scsidev->channel || scsidev->lun))
3009 devno = scsidev->id;
3011 if (unlikely(scsidev->id || scsidev->lun))
3013 devno = scsidev->channel;
3016 return ata_find_dev(ap, devno);
3020 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
3021 * @ap: ATA port to which the device is attached
3022 * @scsidev: SCSI device from which we derive the ATA device
3024 * Given various information provided in struct scsi_cmnd,
3025 * map that onto an ATA bus, and using that mapping
3026 * determine which ata_device is associated with the
3027 * SCSI command to be sent.
3030 * spin_lock_irqsave(host lock)
3033 * Associated ATA device, or %NULL if not found.
3035 static struct ata_device *
3036 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
3038 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
3040 if (unlikely(!dev || !ata_dev_enabled(dev)))
3047 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
3048 * @byte1: Byte 1 from pass-thru CDB.
3051 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
3054 ata_scsi_map_proto(u8 byte1)
3056 switch((byte1 & 0x1e) >> 1) {
3057 case 3: /* Non-data */
3058 return ATA_PROT_NODATA;
3061 case 10: /* UDMA Data-in */
3062 case 11: /* UDMA Data-Out */
3063 return ATA_PROT_DMA;
3065 case 4: /* PIO Data-in */
3066 case 5: /* PIO Data-out */
3067 return ATA_PROT_PIO;
3069 case 12: /* FPDMA */
3070 return ATA_PROT_NCQ;
3072 case 0: /* Hard Reset */
3074 case 8: /* Device Diagnostic */
3075 case 9: /* Device Reset */
3076 case 7: /* DMA Queued */
3077 case 15: /* Return Response Info */
3078 default: /* Reserved */
3082 return ATA_PROT_UNKNOWN;
3086 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
3087 * @qc: command structure to be initialized
3089 * Handles either 12 or 16-byte versions of the CDB.
3092 * Zero on success, non-zero on failure.
3094 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
3096 struct ata_taskfile *tf = &(qc->tf);
3097 struct scsi_cmnd *scmd = qc->scsicmd;
3098 struct ata_device *dev = qc->dev;
3099 const u8 *cdb = scmd->cmnd;
3102 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) {
3107 if (ata_is_ncq(tf->protocol) && (cdb[2] & 0x3) == 0)
3108 tf->protocol = ATA_PROT_NCQ_NODATA;
3111 tf->flags |= ATA_TFLAG_LBA;
3114 * 12 and 16 byte CDBs use different offsets to
3115 * provide the various register values.
3117 if (cdb[0] == ATA_16) {
3119 * 16-byte CDB - may contain extended commands.
3121 * If that is the case, copy the upper byte register values.
3123 if (cdb[1] & 0x01) {
3124 tf->hob_feature = cdb[3];
3125 tf->hob_nsect = cdb[5];
3126 tf->hob_lbal = cdb[7];
3127 tf->hob_lbam = cdb[9];
3128 tf->hob_lbah = cdb[11];
3129 tf->flags |= ATA_TFLAG_LBA48;
3131 tf->flags &= ~ATA_TFLAG_LBA48;
3134 * Always copy low byte, device and command registers.
3136 tf->feature = cdb[4];
3141 tf->device = cdb[13];
3142 tf->command = cdb[14];
3145 * 12-byte CDB - incapable of extended commands.
3147 tf->flags &= ~ATA_TFLAG_LBA48;
3149 tf->feature = cdb[3];
3154 tf->device = cdb[8];
3155 tf->command = cdb[9];
3158 /* For NCQ commands copy the tag value */
3159 if (ata_is_ncq(tf->protocol))
3160 tf->nsect = qc->tag << 3;
3162 /* enforce correct master/slave bit */
3163 tf->device = dev->devno ?
3164 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
3166 switch (tf->command) {
3167 /* READ/WRITE LONG use a non-standard sect_size */
3168 case ATA_CMD_READ_LONG:
3169 case ATA_CMD_READ_LONG_ONCE:
3170 case ATA_CMD_WRITE_LONG:
3171 case ATA_CMD_WRITE_LONG_ONCE:
3172 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) {
3176 qc->sect_size = scsi_bufflen(scmd);
3179 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3180 case ATA_CMD_CFA_WRITE_NE:
3181 case ATA_CMD_CFA_TRANS_SECT:
3182 case ATA_CMD_CFA_WRITE_MULT_NE:
3183 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3185 case ATA_CMD_READ_EXT:
3186 case ATA_CMD_READ_QUEUED:
3187 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3188 case ATA_CMD_FPDMA_READ:
3189 case ATA_CMD_READ_MULTI:
3190 case ATA_CMD_READ_MULTI_EXT:
3191 case ATA_CMD_PIO_READ:
3192 case ATA_CMD_PIO_READ_EXT:
3193 case ATA_CMD_READ_STREAM_DMA_EXT:
3194 case ATA_CMD_READ_STREAM_EXT:
3195 case ATA_CMD_VERIFY:
3196 case ATA_CMD_VERIFY_EXT:
3198 case ATA_CMD_WRITE_EXT:
3199 case ATA_CMD_WRITE_FUA_EXT:
3200 case ATA_CMD_WRITE_QUEUED:
3201 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
3202 case ATA_CMD_FPDMA_WRITE:
3203 case ATA_CMD_WRITE_MULTI:
3204 case ATA_CMD_WRITE_MULTI_EXT:
3205 case ATA_CMD_WRITE_MULTI_FUA_EXT:
3206 case ATA_CMD_PIO_WRITE:
3207 case ATA_CMD_PIO_WRITE_EXT:
3208 case ATA_CMD_WRITE_STREAM_DMA_EXT:
3209 case ATA_CMD_WRITE_STREAM_EXT:
3210 qc->sect_size = scmd->device->sector_size;
3213 /* Everything else uses 512 byte "sectors" */
3215 qc->sect_size = ATA_SECT_SIZE;
3219 * Set flags so that all registers will be written, pass on
3220 * write indication (used for PIO/DMA setup), result TF is
3221 * copied back and we don't whine too much about its failure.
3223 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3224 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3225 tf->flags |= ATA_TFLAG_WRITE;
3227 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3230 * Set transfer length.
3232 * TODO: find out if we need to do more here to
3233 * cover scatter/gather case.
3235 ata_qc_set_pc_nbytes(qc);
3237 /* We may not issue DMA commands if no DMA mode is set */
3238 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) {
3243 /* sanity check for pio multi commands */
3244 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) {
3249 if (is_multi_taskfile(tf)) {
3250 unsigned int multi_count = 1 << (cdb[1] >> 5);
3252 /* compare the passed through multi_count
3253 * with the cached multi_count of libata
3255 if (multi_count != dev->multi_count)
3256 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3261 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3262 * SET_FEATURES - XFER MODE must be preceded/succeeded
3263 * by an update to hardware-specific registers for each
3264 * controller (i.e. the reason for ->set_piomode(),
3265 * ->set_dmamode(), and ->post_set_mode() hooks).
3267 if (tf->command == ATA_CMD_SET_FEATURES &&
3268 tf->feature == SETFEATURES_XFER) {
3269 fp = (cdb[0] == ATA_16) ? 4 : 3;
3274 * Filter TPM commands by default. These provide an
3275 * essentially uncontrolled encrypted "back door" between
3276 * applications and the disk. Set libata.allow_tpm=1 if you
3277 * have a real reason for wanting to use them. This ensures
3278 * that installed software cannot easily mess stuff up without
3279 * user intent. DVR type users will probably ship with this enabled
3280 * for movie content management.
3282 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3283 * for this and should do in future but that it is not sufficient as
3284 * DCS is an optional feature set. Thus we also do the software filter
3285 * so that we comply with the TC consortium stated goal that the user
3286 * can turn off TC features of their system.
3288 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) {
3289 fp = (cdb[0] == ATA_16) ? 14 : 9;
3296 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff);
3301 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim
3302 * @cmd: SCSI command being translated
3303 * @trmax: Maximum number of entries that will fit in sector_size bytes.
3304 * @sector: Starting sector
3305 * @count: Total Range of request in logical sectors
3307 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted
3310 * Upto 64 entries of the format:
3311 * 63:48 Range Length
3314 * Range Length of 0 is ignored.
3315 * LBA's should be sorted order and not overlap.
3317 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET
3319 * Return: Number of bytes copied into sglist.
3321 static ssize_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax,
3322 u64 sector, u32 count)
3328 buf = kzalloc(cmd->device->sector_size, GFP_NOFS);
3333 u64 entry = sector |
3334 ((u64)(count > 0xffff ? 0xffff : count) << 48);
3335 buf[i++] = __cpu_to_le64(entry);
3336 if (count <= 0xffff)
3341 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf,
3342 cmd->device->sector_size);
3348 * ata_format_dsm_trim_descr() - SATL Write Same to ATA SCT Write Same
3349 * @cmd: SCSI command being translated
3350 * @lba: Starting sector
3351 * @num: Number of sectors to be zero'd.
3353 * Rewrite the WRITE SAME payload to be an SCT Write Same formatted
3355 * NOTE: Writes a pattern (0's) in the foreground.
3357 * Return: Number of bytes copied into sglist.
3359 static ssize_t ata_format_sct_write_same(struct scsi_cmnd *cmd, u64 lba,
3365 buf = kzalloc(cmd->device->sector_size, GFP_NOIO);
3369 put_unaligned_le16(0x0002, &buf[0]); /* SCT_ACT_WRITE_SAME */
3370 put_unaligned_le16(0x0101, &buf[1]); /* WRITE PTRN FG */
3371 put_unaligned_le64(lba, &buf[2]);
3372 put_unaligned_le64(num, &buf[6]);
3373 put_unaligned_le32(0u, &buf[10]); /* pattern */
3375 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf,
3376 cmd->device->sector_size);
3382 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same
3383 * @qc: Command to be translated
3385 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or
3386 * an SCT Write Same command.
3387 * Based on WRITE SAME has the UNMAP flag
3388 * When set translate to DSM TRIM
3389 * When clear translate to SCT Write Same
3391 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3393 struct ata_taskfile *tf = &qc->tf;
3394 struct scsi_cmnd *scmd = qc->scsicmd;
3395 struct scsi_device *sdp = scmd->device;
3396 size_t len = sdp->sector_size;
3397 struct ata_device *dev = qc->dev;
3398 const u8 *cdb = scmd->cmnd;
3401 const u32 trmax = len >> 3;
3405 u8 unmap = cdb[1] & 0x8;
3407 /* we may not issue DMA commands if no DMA mode is set */
3408 if (unlikely(!dev->dma_mode))
3409 goto invalid_opcode;
3411 if (unlikely(scmd->cmd_len < 16)) {
3415 scsi_16_lba_len(cdb, &block, &n_block);
3418 /* If trim is not enabled the cmd is invalid. */
3419 if ((dev->horkage & ATA_HORKAGE_NOTRIM) ||
3420 !ata_id_has_trim(dev->id)) {
3425 /* If the request is too large the cmd is invalid */
3426 if (n_block > 0xffff * trmax) {
3431 /* If write same is not available the cmd is invalid */
3432 if (!ata_id_sct_write_same(dev->id)) {
3440 * WRITE SAME always has a sector sized buffer as payload, this
3441 * should never be a multiple entry S/G list.
3443 if (!scsi_sg_count(scmd))
3444 goto invalid_param_len;
3447 * size must match sector size in bytes
3448 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count)
3449 * is defined as number of 512 byte blocks to be transferred.
3452 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block);
3456 goto invalid_param_len;
3458 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3459 /* Newer devices support queued TRIM commands */
3460 tf->protocol = ATA_PROT_NCQ;
3461 tf->command = ATA_CMD_FPDMA_SEND;
3462 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3463 tf->nsect = qc->tag << 3;
3464 tf->hob_feature = (size / 512) >> 8;
3465 tf->feature = size / 512;
3469 tf->protocol = ATA_PROT_DMA;
3470 tf->hob_feature = 0;
3471 tf->feature = ATA_DSM_TRIM;
3472 tf->hob_nsect = (size / 512) >> 8;
3473 tf->nsect = size / 512;
3474 tf->command = ATA_CMD_DSM;
3477 size = ata_format_sct_write_same(scmd, block, n_block);
3481 goto invalid_param_len;
3483 tf->hob_feature = 0;
3489 tf->lbal = ATA_CMD_STANDBYNOW1;
3493 tf->device = ATA_CMD_STANDBYNOW1;
3494 tf->protocol = ATA_PROT_DMA;
3495 tf->command = ATA_CMD_WRITE_LOG_DMA_EXT;
3496 if (unlikely(dev->flags & ATA_DFLAG_PIO))
3497 tf->command = ATA_CMD_WRITE_LOG_EXT;
3500 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3503 ata_qc_set_pc_nbytes(qc);
3508 ata_scsi_set_invalid_field(dev, scmd, fp, bp);
3511 /* "Parameter list length error" */
3512 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3515 /* "Invalid command operation code" */
3516 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0);
3519 /* "Logical unit communication failure" */
3520 ata_scsi_set_sense(dev, scmd, NOT_READY, 0x08, 0);
3525 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN
3526 * @args: device MAINTENANCE_IN data / SCSI command of interest.
3527 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
3529 * Yields a subset to satisfy scsi_report_opcode()
3532 * spin_lock_irqsave(host lock)
3534 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf)
3536 struct ata_device *dev = args->dev;
3537 u8 *cdb = args->cmd->cmnd;
3539 unsigned int err = 0;
3542 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]);
3551 case SERVICE_ACTION_IN_16:
3554 case SYNCHRONIZE_CACHE:
3558 case TEST_UNIT_READY:
3559 case SEND_DIAGNOSTIC:
3560 case MAINTENANCE_IN:
3572 case MODE_SELECT_10:
3577 if (!ata_id_sct_write_same(dev->id))
3579 /* fallthrough: if SCT ... only enable for ZBC */
3582 if (ata_id_zoned_cap(dev->id) ||
3583 dev->class == ATA_DEV_ZAC)
3590 rbuf[1] = supported; /* supported */
3595 * ata_scsi_report_zones_complete - convert ATA output
3596 * @qc: command structure returning the data
3598 * Convert T-13 little-endian field representation into
3599 * T-10 big-endian field representation.
3602 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc)
3604 struct scsi_cmnd *scmd = qc->scsicmd;
3605 struct sg_mapping_iter miter;
3606 unsigned long flags;
3607 unsigned int bytes = 0;
3609 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd),
3610 SG_MITER_TO_SG | SG_MITER_ATOMIC);
3612 local_irq_save(flags);
3613 while (sg_miter_next(&miter)) {
3614 unsigned int offset = 0;
3619 u64 max_lba, opt_lba;
3622 /* Swizzle header */
3624 list_length = get_unaligned_le32(&hdr[0]);
3625 same = get_unaligned_le16(&hdr[4]);
3626 max_lba = get_unaligned_le64(&hdr[8]);
3627 opt_lba = get_unaligned_le64(&hdr[16]);
3628 put_unaligned_be32(list_length, &hdr[0]);
3629 hdr[4] = same & 0xf;
3630 put_unaligned_be64(max_lba, &hdr[8]);
3631 put_unaligned_be64(opt_lba, &hdr[16]);
3635 while (offset < miter.length) {
3637 u8 cond, type, non_seq, reset;
3638 u64 size, start, wp;
3640 /* Swizzle zone descriptor */
3641 rec = miter.addr + offset;
3642 type = rec[0] & 0xf;
3643 cond = (rec[1] >> 4) & 0xf;
3644 non_seq = (rec[1] & 2);
3645 reset = (rec[1] & 1);
3646 size = get_unaligned_le64(&rec[8]);
3647 start = get_unaligned_le64(&rec[16]);
3648 wp = get_unaligned_le64(&rec[24]);
3650 rec[1] = (cond << 4) | non_seq | reset;
3651 put_unaligned_be64(size, &rec[8]);
3652 put_unaligned_be64(start, &rec[16]);
3653 put_unaligned_be64(wp, &rec[24]);
3654 WARN_ON(offset + 64 > miter.length);
3659 sg_miter_stop(&miter);
3660 local_irq_restore(flags);
3662 ata_scsi_qc_complete(qc);
3665 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc)
3667 struct ata_taskfile *tf = &qc->tf;
3668 struct scsi_cmnd *scmd = qc->scsicmd;
3669 const u8 *cdb = scmd->cmnd;
3670 u16 sect, fp = (u16)-1;
3671 u8 sa, options, bp = 0xff;
3675 if (unlikely(scmd->cmd_len < 16)) {
3676 ata_dev_warn(qc->dev, "invalid cdb length %d\n",
3681 scsi_16_lba_len(cdb, &block, &n_block);
3682 if (n_block != scsi_bufflen(scmd)) {
3683 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n",
3684 n_block, scsi_bufflen(scmd));
3685 goto invalid_param_len;
3688 if (sa != ZI_REPORT_ZONES) {
3689 ata_dev_warn(qc->dev, "invalid service action %d\n", sa);
3694 * ZAC allows only for transfers in 512 byte blocks,
3695 * and uses a 16 bit value for the transfer count.
3697 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) {
3698 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block);
3699 goto invalid_param_len;
3701 sect = n_block / 512;
3702 options = cdb[14] & 0xbf;
3704 if (ata_ncq_enabled(qc->dev) &&
3705 ata_fpdma_zac_mgmt_in_supported(qc->dev)) {
3706 tf->protocol = ATA_PROT_NCQ;
3707 tf->command = ATA_CMD_FPDMA_RECV;
3708 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f;
3709 tf->nsect = qc->tag << 3;
3710 tf->feature = sect & 0xff;
3711 tf->hob_feature = (sect >> 8) & 0xff;
3712 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8);
3714 tf->command = ATA_CMD_ZAC_MGMT_IN;
3715 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES;
3716 tf->protocol = ATA_PROT_DMA;
3717 tf->hob_feature = options;
3718 tf->hob_nsect = (sect >> 8) & 0xff;
3719 tf->nsect = sect & 0xff;
3721 tf->device = ATA_LBA;
3722 tf->lbah = (block >> 16) & 0xff;
3723 tf->lbam = (block >> 8) & 0xff;
3724 tf->lbal = block & 0xff;
3725 tf->hob_lbah = (block >> 40) & 0xff;
3726 tf->hob_lbam = (block >> 32) & 0xff;
3727 tf->hob_lbal = (block >> 24) & 0xff;
3729 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3730 qc->flags |= ATA_QCFLAG_RESULT_TF;
3732 ata_qc_set_pc_nbytes(qc);
3734 qc->complete_fn = ata_scsi_report_zones_complete;
3739 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
3743 /* "Parameter list length error" */
3744 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3748 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc)
3750 struct ata_taskfile *tf = &qc->tf;
3751 struct scsi_cmnd *scmd = qc->scsicmd;
3752 struct ata_device *dev = qc->dev;
3753 const u8 *cdb = scmd->cmnd;
3759 if (unlikely(scmd->cmd_len < 16)) {
3765 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) &&
3766 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) {
3771 scsi_16_lba_len(cdb, &block, &n_block);
3774 * ZAC MANAGEMENT OUT doesn't define any length
3776 goto invalid_param_len;
3778 if (block > dev->n_sectors)
3781 all = cdb[14] & 0x1;
3783 if (ata_ncq_enabled(qc->dev) &&
3784 ata_fpdma_zac_mgmt_out_supported(qc->dev)) {
3785 tf->protocol = ATA_PROT_NCQ_NODATA;
3786 tf->command = ATA_CMD_NCQ_NON_DATA;
3787 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT;
3788 tf->nsect = qc->tag << 3;
3789 tf->auxiliary = sa | ((u16)all << 8);
3791 tf->protocol = ATA_PROT_NODATA;
3792 tf->command = ATA_CMD_ZAC_MGMT_OUT;
3794 tf->hob_feature = all;
3796 tf->lbah = (block >> 16) & 0xff;
3797 tf->lbam = (block >> 8) & 0xff;
3798 tf->lbal = block & 0xff;
3799 tf->hob_lbah = (block >> 40) & 0xff;
3800 tf->hob_lbam = (block >> 32) & 0xff;
3801 tf->hob_lbal = (block >> 24) & 0xff;
3802 tf->device = ATA_LBA;
3803 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3808 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
3811 /* "Logical Block Address out of range" */
3812 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x00);
3815 /* "Parameter list length error" */
3816 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3821 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3822 * @qc: Storage for translated ATA taskfile
3823 * @buf: input buffer
3824 * @len: number of valid bytes in the input buffer
3825 * @fp: out parameter for the failed field on error
3827 * Prepare a taskfile to modify caching information for the device.
3832 static int ata_mselect_caching(struct ata_queued_cmd *qc,
3833 const u8 *buf, int len, u16 *fp)
3835 struct ata_taskfile *tf = &qc->tf;
3836 struct ata_device *dev = qc->dev;
3837 u8 mpage[CACHE_MPAGE_LEN];
3842 * The first two bytes of def_cache_mpage are a header, so offsets
3843 * in mpage are off by 2 compared to buf. Same for len.
3846 if (len != CACHE_MPAGE_LEN - 2) {
3847 if (len < CACHE_MPAGE_LEN - 2)
3850 *fp = CACHE_MPAGE_LEN - 2;
3854 wce = buf[0] & (1 << 2);
3857 * Check that read-only bits are not modified.
3859 ata_msense_caching(dev->id, mpage, false);
3860 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) {
3863 if (mpage[i + 2] != buf[i]) {
3869 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3870 tf->protocol = ATA_PROT_NODATA;
3872 tf->command = ATA_CMD_SET_FEATURES;
3873 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3878 * ata_mselect_control - Simulate MODE SELECT for control page
3879 * @qc: Storage for translated ATA taskfile
3880 * @buf: input buffer
3881 * @len: number of valid bytes in the input buffer
3882 * @fp: out parameter for the failed field on error
3884 * Prepare a taskfile to modify caching information for the device.
3889 static int ata_mselect_control(struct ata_queued_cmd *qc,
3890 const u8 *buf, int len, u16 *fp)
3892 struct ata_device *dev = qc->dev;
3893 u8 mpage[CONTROL_MPAGE_LEN];
3898 * The first two bytes of def_control_mpage are a header, so offsets
3899 * in mpage are off by 2 compared to buf. Same for len.
3902 if (len != CONTROL_MPAGE_LEN - 2) {
3903 if (len < CONTROL_MPAGE_LEN - 2)
3906 *fp = CONTROL_MPAGE_LEN - 2;
3910 d_sense = buf[0] & (1 << 2);
3913 * Check that read-only bits are not modified.
3915 ata_msense_control(dev, mpage, false);
3916 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) {
3919 if (mpage[2 + i] != buf[i]) {
3924 if (d_sense & (1 << 2))
3925 dev->flags |= ATA_DFLAG_D_SENSE;
3927 dev->flags &= ~ATA_DFLAG_D_SENSE;
3932 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
3933 * @qc: Storage for translated ATA taskfile
3935 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3936 * Assume this is invoked for direct access devices (e.g. disks) only.
3937 * There should be no block descriptor for other device types.
3940 * spin_lock_irqsave(host lock)
3942 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3944 struct scsi_cmnd *scmd = qc->scsicmd;
3945 const u8 *cdb = scmd->cmnd;
3948 unsigned six_byte, pg_len, hdr_len, bd_len;
3955 six_byte = (cdb[0] == MODE_SELECT);
3957 if (scmd->cmd_len < 5) {
3965 if (scmd->cmd_len < 9) {
3970 len = (cdb[7] << 8) + cdb[8];
3974 /* We only support PF=1, SP=0. */
3975 if ((cdb[1] & 0x11) != 0x10) {
3977 bp = (cdb[1] & 0x01) ? 1 : 5;
3981 /* Test early for possible overrun. */
3982 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
3983 goto invalid_param_len;
3985 p = page_address(sg_page(scsi_sglist(scmd)));
3987 /* Move past header and block descriptors. */
3989 goto invalid_param_len;
3994 bd_len = (p[6] << 8) + p[7];
3999 goto invalid_param_len;
4000 if (bd_len != 0 && bd_len != 8) {
4001 fp = (six_byte) ? 3 : 6;
4002 fp += bd_len + hdr_len;
4011 /* Parse both possible formats for the mode page headers. */
4015 goto invalid_param_len;
4018 pg_len = (p[2] << 8) | p[3];
4023 goto invalid_param_len;
4032 * No mode subpages supported (yet) but asking for _all_
4033 * subpages may be valid
4035 if (spg && (spg != ALL_SUB_MPAGES)) {
4036 fp = (p[0] & 0x40) ? 1 : 0;
4037 fp += hdr_len + bd_len;
4041 goto invalid_param_len;
4045 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) {
4046 fp += hdr_len + bd_len;
4051 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) {
4052 fp += hdr_len + bd_len;
4055 goto skip; /* No ATA command to send */
4058 default: /* invalid page code */
4059 fp = bd_len + hdr_len;
4064 * Only one page has changeable data, so we only support setting one
4073 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
4077 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp);
4081 /* "Parameter list length error" */
4082 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
4086 scmd->result = SAM_STAT_GOOD;
4091 * ata_get_xlat_func - check if SCSI to ATA translation is possible
4093 * @cmd: SCSI command opcode to consider
4095 * Look up the SCSI command given, and determine whether the
4096 * SCSI command is to be translated or simulated.
4099 * Pointer to translation function if possible, %NULL if not.
4102 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
4112 return ata_scsi_rw_xlat;
4115 return ata_scsi_write_same_xlat;
4117 case SYNCHRONIZE_CACHE:
4118 if (ata_try_flush_cache(dev))
4119 return ata_scsi_flush_xlat;
4124 return ata_scsi_verify_xlat;
4128 return ata_scsi_pass_thru;
4131 case MODE_SELECT_10:
4132 return ata_scsi_mode_select_xlat;
4136 return ata_scsi_zbc_in_xlat;
4139 return ata_scsi_zbc_out_xlat;
4142 return ata_scsi_start_stop_xlat;
4149 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
4150 * @ap: ATA port to which the command was being sent
4151 * @cmd: SCSI command to dump
4153 * Prints the contents of a SCSI command via printk().
4156 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
4157 struct scsi_cmnd *cmd)
4160 struct scsi_device *scsidev = cmd->device;
4162 DPRINTK("CDB (%u:%d,%d,%d) %9ph\n",
4164 scsidev->channel, scsidev->id, scsidev->lun,
4169 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
4170 struct ata_device *dev)
4172 u8 scsi_op = scmd->cmnd[0];
4173 ata_xlat_func_t xlat_func;
4176 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
4177 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
4180 xlat_func = ata_get_xlat_func(dev, scsi_op);
4182 if (unlikely(!scmd->cmd_len))
4186 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
4187 /* relay SCSI command to ATAPI device */
4188 int len = COMMAND_SIZE(scsi_op);
4189 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
4192 xlat_func = atapi_xlat;
4194 /* ATA_16 passthru, treat as an ATA command */
4195 if (unlikely(scmd->cmd_len > 16))
4198 xlat_func = ata_get_xlat_func(dev, scsi_op);
4203 rc = ata_scsi_translate(dev, scmd, xlat_func);
4205 ata_scsi_simulate(dev, scmd);
4210 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
4211 scmd->cmd_len, scsi_op, dev->cdb_len);
4212 scmd->result = DID_ERROR << 16;
4213 scmd->scsi_done(scmd);
4218 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
4219 * @shost: SCSI host of command to be sent
4220 * @cmd: SCSI command to be sent
4222 * In some cases, this function translates SCSI commands into
4223 * ATA taskfiles, and queues the taskfiles to be sent to
4224 * hardware. In other cases, this function simulates a
4225 * SCSI device by evaluating and responding to certain
4226 * SCSI commands. This creates the overall effect of
4227 * ATA and ATAPI devices appearing as SCSI devices.
4233 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4236 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
4238 struct ata_port *ap;
4239 struct ata_device *dev;
4240 struct scsi_device *scsidev = cmd->device;
4242 unsigned long irq_flags;
4244 ap = ata_shost_to_port(shost);
4246 spin_lock_irqsave(ap->lock, irq_flags);
4248 ata_scsi_dump_cdb(ap, cmd);
4250 dev = ata_scsi_find_dev(ap, scsidev);
4252 rc = __ata_scsi_queuecmd(cmd, dev);
4254 cmd->result = (DID_BAD_TARGET << 16);
4255 cmd->scsi_done(cmd);
4258 spin_unlock_irqrestore(ap->lock, irq_flags);
4264 * ata_scsi_simulate - simulate SCSI command on ATA device
4265 * @dev: the target device
4266 * @cmd: SCSI command being sent to device.
4268 * Interprets and directly executes a select list of SCSI commands
4269 * that can be handled internally.
4272 * spin_lock_irqsave(host lock)
4275 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
4277 struct ata_scsi_args args;
4278 const u8 *scsicmd = cmd->cmnd;
4285 switch(scsicmd[0]) {
4287 if (scsicmd[1] & 2) /* is CmdDt set? */
4288 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4289 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
4290 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
4291 else switch (scsicmd[2]) {
4293 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
4296 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
4299 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
4302 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
4305 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
4308 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
4311 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
4314 if (dev->flags & ATA_DFLAG_ZAC) {
4315 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6);
4320 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
4327 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
4331 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4334 case SERVICE_ACTION_IN_16:
4335 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
4336 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4338 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4342 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
4346 ata_scsi_set_sense(dev, cmd, 0, 0, 0);
4347 cmd->result = (DRIVER_SENSE << 24);
4350 /* if we reach this, then writeback caching is disabled,
4351 * turning this into a no-op.
4353 case SYNCHRONIZE_CACHE:
4356 /* no-op's, complete with success */
4360 case TEST_UNIT_READY:
4363 case SEND_DIAGNOSTIC:
4364 tmp8 = scsicmd[1] & ~(1 << 3);
4365 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4])
4366 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4369 case MAINTENANCE_IN:
4370 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES)
4371 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in);
4373 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4376 /* all other commands */
4378 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0);
4379 /* "Invalid command operation code" */
4383 cmd->scsi_done(cmd);
4386 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
4390 for (i = 0; i < host->n_ports; i++) {
4391 struct ata_port *ap = host->ports[i];
4392 struct Scsi_Host *shost;
4395 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
4399 shost->eh_noresume = 1;
4400 *(struct ata_port **)&shost->hostdata[0] = ap;
4401 ap->scsi_host = shost;
4403 shost->transportt = ata_scsi_transport_template;
4404 shost->unique_id = ap->print_id;
4407 shost->max_channel = 1;
4408 shost->max_cmd_len = 16;
4410 /* Schedule policy is determined by ->qc_defer()
4411 * callback and it needs to see every deferred qc.
4412 * Set host_blocked to 1 to prevent SCSI midlayer from
4413 * automatically deferring requests.
4415 shost->max_host_blocked = 1;
4417 rc = scsi_add_host_with_dma(ap->scsi_host,
4418 &ap->tdev, ap->host->dev);
4426 scsi_host_put(host->ports[i]->scsi_host);
4429 struct Scsi_Host *shost = host->ports[i]->scsi_host;
4431 scsi_remove_host(shost);
4432 scsi_host_put(shost);
4437 void ata_scsi_scan_host(struct ata_port *ap, int sync)
4440 struct ata_device *last_failed_dev = NULL;
4441 struct ata_link *link;
4442 struct ata_device *dev;
4445 ata_for_each_link(link, ap, EDGE) {
4446 ata_for_each_dev(dev, link, ENABLED) {
4447 struct scsi_device *sdev;
4448 int channel = 0, id = 0;
4453 if (ata_is_host_link(link))
4456 channel = link->pmp;
4458 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
4460 if (!IS_ERR(sdev)) {
4462 scsi_device_put(sdev);
4469 /* If we scanned while EH was in progress or allocation
4470 * failure occurred, scan would have failed silently. Check
4471 * whether all devices are attached.
4473 ata_for_each_link(link, ap, EDGE) {
4474 ata_for_each_dev(dev, link, ENABLED) {
4483 /* we're missing some SCSI devices */
4485 /* If caller requested synchrnous scan && we've made
4486 * any progress, sleep briefly and repeat.
4488 if (dev != last_failed_dev) {
4490 last_failed_dev = dev;
4494 /* We might be failing to detect boot device, give it
4495 * a few more chances.
4503 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
4506 queue_delayed_work(system_long_wq, &ap->hotplug_task,
4507 round_jiffies_relative(HZ));
4511 * ata_scsi_offline_dev - offline attached SCSI device
4512 * @dev: ATA device to offline attached SCSI device for
4514 * This function is called from ata_eh_hotplug() and responsible
4515 * for taking the SCSI device attached to @dev offline. This
4516 * function is called with host lock which protects dev->sdev
4520 * spin_lock_irqsave(host lock)
4523 * 1 if attached SCSI device exists, 0 otherwise.
4525 int ata_scsi_offline_dev(struct ata_device *dev)
4528 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
4535 * ata_scsi_remove_dev - remove attached SCSI device
4536 * @dev: ATA device to remove attached SCSI device for
4538 * This function is called from ata_eh_scsi_hotplug() and
4539 * responsible for removing the SCSI device attached to @dev.
4542 * Kernel thread context (may sleep).
4544 static void ata_scsi_remove_dev(struct ata_device *dev)
4546 struct ata_port *ap = dev->link->ap;
4547 struct scsi_device *sdev;
4548 unsigned long flags;
4550 /* Alas, we need to grab scan_mutex to ensure SCSI device
4551 * state doesn't change underneath us and thus
4552 * scsi_device_get() always succeeds. The mutex locking can
4553 * be removed if there is __scsi_device_get() interface which
4554 * increments reference counts regardless of device state.
4556 mutex_lock(&ap->scsi_host->scan_mutex);
4557 spin_lock_irqsave(ap->lock, flags);
4559 /* clearing dev->sdev is protected by host lock */
4564 /* If user initiated unplug races with us, sdev can go
4565 * away underneath us after the host lock and
4566 * scan_mutex are released. Hold onto it.
4568 if (scsi_device_get(sdev) == 0) {
4569 /* The following ensures the attached sdev is
4570 * offline on return from ata_scsi_offline_dev()
4571 * regardless it wins or loses the race
4572 * against this function.
4574 scsi_device_set_state(sdev, SDEV_OFFLINE);
4581 spin_unlock_irqrestore(ap->lock, flags);
4582 mutex_unlock(&ap->scsi_host->scan_mutex);
4585 ata_dev_info(dev, "detaching (SCSI %s)\n",
4586 dev_name(&sdev->sdev_gendev));
4588 scsi_remove_device(sdev);
4589 scsi_device_put(sdev);
4593 static void ata_scsi_handle_link_detach(struct ata_link *link)
4595 struct ata_port *ap = link->ap;
4596 struct ata_device *dev;
4598 ata_for_each_dev(dev, link, ALL) {
4599 unsigned long flags;
4601 if (!(dev->flags & ATA_DFLAG_DETACHED))
4604 spin_lock_irqsave(ap->lock, flags);
4605 dev->flags &= ~ATA_DFLAG_DETACHED;
4606 spin_unlock_irqrestore(ap->lock, flags);
4608 if (zpodd_dev_enabled(dev))
4611 ata_scsi_remove_dev(dev);
4616 * ata_scsi_media_change_notify - send media change event
4617 * @dev: Pointer to the disk device with media change event
4619 * Tell the block layer to send a media change notification
4623 * spin_lock_irqsave(host lock)
4625 void ata_scsi_media_change_notify(struct ata_device *dev)
4628 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
4633 * ata_scsi_hotplug - SCSI part of hotplug
4634 * @work: Pointer to ATA port to perform SCSI hotplug on
4636 * Perform SCSI part of hotplug. It's executed from a separate
4637 * workqueue after EH completes. This is necessary because SCSI
4638 * hot plugging requires working EH and hot unplugging is
4639 * synchronized with hot plugging with a mutex.
4642 * Kernel thread context (may sleep).
4644 void ata_scsi_hotplug(struct work_struct *work)
4646 struct ata_port *ap =
4647 container_of(work, struct ata_port, hotplug_task.work);
4650 if (ap->pflags & ATA_PFLAG_UNLOADING) {
4651 DPRINTK("ENTER/EXIT - unloading\n");
4658 * The block layer suspend/resume path is fundamentally broken due
4659 * to freezable kthreads and workqueue and may deadlock if a block
4660 * device gets removed while resume is in progress. I don't know
4661 * what the solution is short of removing freezable kthreads and
4662 * workqueues altogether.
4664 * The following is an ugly hack to avoid kicking off device
4665 * removal while freezer is active. This is a joke but does avoid
4666 * this particular deadlock scenario.
4668 * https://bugzilla.kernel.org/show_bug.cgi?id=62801
4669 * http://marc.info/?l=linux-kernel&m=138695698516487
4671 #ifdef CONFIG_FREEZER
4677 mutex_lock(&ap->scsi_scan_mutex);
4679 /* Unplug detached devices. We cannot use link iterator here
4680 * because PMP links have to be scanned even if PMP is
4681 * currently not attached. Iterate manually.
4683 ata_scsi_handle_link_detach(&ap->link);
4685 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
4686 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
4688 /* scan for new ones */
4689 ata_scsi_scan_host(ap, 0);
4691 mutex_unlock(&ap->scsi_scan_mutex);
4696 * ata_scsi_user_scan - indication for user-initiated bus scan
4697 * @shost: SCSI host to scan
4698 * @channel: Channel to scan
4702 * This function is called when user explicitly requests bus
4703 * scan. Set probe pending flag and invoke EH.
4706 * SCSI layer (we don't care)
4711 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
4712 unsigned int id, u64 lun)
4714 struct ata_port *ap = ata_shost_to_port(shost);
4715 unsigned long flags;
4718 if (!ap->ops->error_handler)
4721 if (lun != SCAN_WILD_CARD && lun)
4724 if (!sata_pmp_attached(ap)) {
4725 if (channel != SCAN_WILD_CARD && channel)
4729 if (id != SCAN_WILD_CARD && id)
4734 spin_lock_irqsave(ap->lock, flags);
4736 if (devno == SCAN_WILD_CARD) {
4737 struct ata_link *link;
4739 ata_for_each_link(link, ap, EDGE) {
4740 struct ata_eh_info *ehi = &link->eh_info;
4741 ehi->probe_mask |= ATA_ALL_DEVICES;
4742 ehi->action |= ATA_EH_RESET;
4745 struct ata_device *dev = ata_find_dev(ap, devno);
4748 struct ata_eh_info *ehi = &dev->link->eh_info;
4749 ehi->probe_mask |= 1 << dev->devno;
4750 ehi->action |= ATA_EH_RESET;
4756 ata_port_schedule_eh(ap);
4757 spin_unlock_irqrestore(ap->lock, flags);
4758 ata_port_wait_eh(ap);
4760 spin_unlock_irqrestore(ap->lock, flags);
4766 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4767 * @work: Pointer to ATA port to perform scsi_rescan_device()
4769 * After ATA pass thru (SAT) commands are executed successfully,
4770 * libata need to propagate the changes to SCSI layer.
4773 * Kernel thread context (may sleep).
4775 void ata_scsi_dev_rescan(struct work_struct *work)
4777 struct ata_port *ap =
4778 container_of(work, struct ata_port, scsi_rescan_task);
4779 struct ata_link *link;
4780 struct ata_device *dev;
4781 unsigned long flags;
4783 mutex_lock(&ap->scsi_scan_mutex);
4784 spin_lock_irqsave(ap->lock, flags);
4786 ata_for_each_link(link, ap, EDGE) {
4787 ata_for_each_dev(dev, link, ENABLED) {
4788 struct scsi_device *sdev = dev->sdev;
4792 if (scsi_device_get(sdev))
4795 spin_unlock_irqrestore(ap->lock, flags);
4796 scsi_rescan_device(&(sdev->sdev_gendev));
4797 scsi_device_put(sdev);
4798 spin_lock_irqsave(ap->lock, flags);
4802 spin_unlock_irqrestore(ap->lock, flags);
4803 mutex_unlock(&ap->scsi_scan_mutex);
4807 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4808 * @host: ATA host container for all SAS ports
4809 * @port_info: Information from low-level host driver
4810 * @shost: SCSI host that the scsi device is attached to
4813 * PCI/etc. bus probe sem.
4816 * ata_port pointer on success / NULL on failure.
4819 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
4820 struct ata_port_info *port_info,
4821 struct Scsi_Host *shost)
4823 struct ata_port *ap;
4825 ap = ata_port_alloc(host);
4830 ap->lock = &host->lock;
4831 ap->pio_mask = port_info->pio_mask;
4832 ap->mwdma_mask = port_info->mwdma_mask;
4833 ap->udma_mask = port_info->udma_mask;
4834 ap->flags |= port_info->flags;
4835 ap->ops = port_info->port_ops;
4836 ap->cbl = ATA_CBL_SATA;
4840 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
4843 * ata_sas_port_start - Set port up for dma.
4844 * @ap: Port to initialize
4846 * Called just after data structures for each port are
4849 * May be used as the port_start() entry in ata_port_operations.
4852 * Inherited from caller.
4854 int ata_sas_port_start(struct ata_port *ap)
4857 * the port is marked as frozen at allocation time, but if we don't
4858 * have new eh, we won't thaw it
4860 if (!ap->ops->error_handler)
4861 ap->pflags &= ~ATA_PFLAG_FROZEN;
4864 EXPORT_SYMBOL_GPL(ata_sas_port_start);
4867 * ata_port_stop - Undo ata_sas_port_start()
4868 * @ap: Port to shut down
4870 * May be used as the port_stop() entry in ata_port_operations.
4873 * Inherited from caller.
4876 void ata_sas_port_stop(struct ata_port *ap)
4879 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
4882 * ata_sas_async_probe - simply schedule probing and return
4883 * @ap: Port to probe
4885 * For batch scheduling of probe for sas attached ata devices, assumes
4886 * the port has already been through ata_sas_port_init()
4888 void ata_sas_async_probe(struct ata_port *ap)
4890 __ata_port_probe(ap);
4892 EXPORT_SYMBOL_GPL(ata_sas_async_probe);
4894 int ata_sas_sync_probe(struct ata_port *ap)
4896 return ata_port_probe(ap);
4898 EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
4902 * ata_sas_port_init - Initialize a SATA device
4903 * @ap: SATA port to initialize
4906 * PCI/etc. bus probe sem.
4909 * Zero on success, non-zero on error.
4912 int ata_sas_port_init(struct ata_port *ap)
4914 int rc = ap->ops->port_start(ap);
4918 ap->print_id = atomic_inc_return(&ata_print_id);
4921 EXPORT_SYMBOL_GPL(ata_sas_port_init);
4924 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
4925 * @ap: SATA port to destroy
4929 void ata_sas_port_destroy(struct ata_port *ap)
4931 if (ap->ops->port_stop)
4932 ap->ops->port_stop(ap);
4935 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
4938 * ata_sas_slave_configure - Default slave_config routine for libata devices
4939 * @sdev: SCSI device to configure
4940 * @ap: ATA port to which SCSI device is attached
4946 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
4948 ata_scsi_sdev_config(sdev);
4949 ata_scsi_dev_config(sdev, ap->link.device);
4952 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
4955 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
4956 * @cmd: SCSI command to be sent
4957 * @ap: ATA port to which the command is being sent
4960 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4964 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
4968 ata_scsi_dump_cdb(ap, cmd);
4970 if (likely(ata_dev_enabled(ap->link.device)))
4971 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
4973 cmd->result = (DID_BAD_TARGET << 16);
4974 cmd->scsi_done(cmd);
4978 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
4980 int ata_sas_allocate_tag(struct ata_port *ap)
4982 unsigned int max_queue = ap->host->n_tags;
4983 unsigned int i, tag;
4985 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) {
4986 tag = tag < max_queue ? tag : 0;
4988 /* the last tag is reserved for internal command. */
4989 if (tag == ATA_TAG_INTERNAL)
4992 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) {
4993 ap->sas_last_tag = tag;
5000 void ata_sas_free_tag(unsigned int tag, struct ata_port *ap)
5002 clear_bit(tag, &ap->sas_tag_allocated);