1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * libata-scsi.c - helper library for ATA
5 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
6 * Copyright 2003-2004 Jeff Garzik
8 * libata documentation is available via 'make {ps|pdf}docs',
9 * as Documentation/driver-api/libata.rst
11 * Hardware documentation available from
12 * - http://www.t10.org/
13 * - http://www.t13.org/
16 #include <linux/compat.h>
17 #include <linux/slab.h>
18 #include <linux/kernel.h>
19 #include <linux/blkdev.h>
20 #include <linux/spinlock.h>
21 #include <linux/export.h>
22 #include <scsi/scsi.h>
23 #include <scsi/scsi_host.h>
24 #include <scsi/scsi_cmnd.h>
25 #include <scsi/scsi_eh.h>
26 #include <scsi/scsi_device.h>
27 #include <scsi/scsi_tcq.h>
28 #include <scsi/scsi_transport.h>
29 #include <linux/libata.h>
30 #include <linux/hdreg.h>
31 #include <linux/uaccess.h>
32 #include <linux/suspend.h>
33 #include <asm/unaligned.h>
34 #include <linux/ioprio.h>
38 #include "libata-transport.h"
40 #define ATA_SCSI_RBUF_SIZE 2048
42 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
43 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
45 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
47 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
48 const struct scsi_device *scsidev);
50 #define RW_RECOVERY_MPAGE 0x1
51 #define RW_RECOVERY_MPAGE_LEN 12
52 #define CACHE_MPAGE 0x8
53 #define CACHE_MPAGE_LEN 20
54 #define CONTROL_MPAGE 0xa
55 #define CONTROL_MPAGE_LEN 12
56 #define ALL_MPAGES 0x3f
57 #define ALL_SUB_MPAGES 0xff
58 #define CDL_T2A_SUB_MPAGE 0x07
59 #define CDL_T2B_SUB_MPAGE 0x08
60 #define CDL_T2_SUB_MPAGE_LEN 232
61 #define ATA_FEATURE_SUB_MPAGE 0xf2
62 #define ATA_FEATURE_SUB_MPAGE_LEN 16
64 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
66 RW_RECOVERY_MPAGE_LEN - 2,
68 0, /* read retry count */
70 0, /* write retry count */
74 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
77 0, /* contains WCE, needs to be 0 for logic */
78 0, 0, 0, 0, 0, 0, 0, 0, 0,
79 0, /* contains DRA, needs to be 0 for logic */
83 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
85 CONTROL_MPAGE_LEN - 2,
86 2, /* DSENSE=0, GLTSD=1 */
87 0, /* [QAM+QERR may be 1, see 05-359r1] */
88 0, 0, 0, 0, 0xff, 0xff,
89 0, 30 /* extended self test time, see 05-359r1 */
92 static ssize_t ata_scsi_park_show(struct device *device,
93 struct device_attribute *attr, char *buf)
95 struct scsi_device *sdev = to_scsi_device(device);
97 struct ata_link *link;
98 struct ata_device *dev;
103 ap = ata_shost_to_port(sdev->host);
105 spin_lock_irq(ap->lock);
106 dev = ata_scsi_find_dev(ap, sdev);
111 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
118 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
119 link->eh_context.unloaded_mask & (1 << dev->devno) &&
120 time_after(dev->unpark_deadline, now))
121 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
126 spin_unlock_irq(ap->lock);
128 return rc ? rc : sysfs_emit(buf, "%u\n", msecs);
131 static ssize_t ata_scsi_park_store(struct device *device,
132 struct device_attribute *attr,
133 const char *buf, size_t len)
135 struct scsi_device *sdev = to_scsi_device(device);
137 struct ata_device *dev;
142 rc = kstrtoint(buf, 10, &input);
147 if (input > ATA_TMOUT_MAX_PARK) {
149 input = ATA_TMOUT_MAX_PARK;
152 ap = ata_shost_to_port(sdev->host);
154 spin_lock_irqsave(ap->lock, flags);
155 dev = ata_scsi_find_dev(ap, sdev);
156 if (unlikely(!dev)) {
160 if (dev->class != ATA_DEV_ATA &&
161 dev->class != ATA_DEV_ZAC) {
167 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
172 dev->unpark_deadline = ata_deadline(jiffies, input);
173 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
174 ata_port_schedule_eh(ap);
175 complete(&ap->park_req_pending);
179 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
182 dev->flags |= ATA_DFLAG_NO_UNLOAD;
187 spin_unlock_irqrestore(ap->lock, flags);
189 return rc ? rc : len;
191 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
192 ata_scsi_park_show, ata_scsi_park_store);
193 EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
195 bool ata_scsi_sense_is_valid(u8 sk, u8 asc, u8 ascq)
198 * If sk == NO_SENSE, and asc + ascq == NO ADDITIONAL SENSE INFORMATION,
199 * then there is no sense data to add.
201 if (sk == 0 && asc == 0 && ascq == 0)
204 /* If sk > COMPLETED, sense data is bogus. */
211 void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd,
212 u8 sk, u8 asc, u8 ascq)
214 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
216 scsi_build_sense(cmd, d_sense, sk, asc, ascq);
219 void ata_scsi_set_sense_information(struct ata_device *dev,
220 struct scsi_cmnd *cmd,
221 const struct ata_taskfile *tf)
225 information = ata_tf_read_block(tf, dev);
226 if (information == U64_MAX)
229 scsi_set_sense_information(cmd->sense_buffer,
230 SCSI_SENSE_BUFFERSIZE, information);
233 static void ata_scsi_set_invalid_field(struct ata_device *dev,
234 struct scsi_cmnd *cmd, u16 field, u8 bit)
236 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0);
237 /* "Invalid field in CDB" */
238 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
242 static void ata_scsi_set_invalid_parameter(struct ata_device *dev,
243 struct scsi_cmnd *cmd, u16 field)
245 /* "Invalid field in parameter list" */
246 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0);
247 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
251 static struct attribute *ata_common_sdev_attrs[] = {
252 &dev_attr_unload_heads.attr,
256 static const struct attribute_group ata_common_sdev_attr_group = {
257 .attrs = ata_common_sdev_attrs
260 const struct attribute_group *ata_common_sdev_groups[] = {
261 &ata_common_sdev_attr_group,
264 EXPORT_SYMBOL_GPL(ata_common_sdev_groups);
267 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
268 * @sdev: SCSI device for which BIOS geometry is to be determined
269 * @bdev: block device associated with @sdev
270 * @capacity: capacity of SCSI device
271 * @geom: location to which geometry will be output
273 * Generic bios head/sector/cylinder calculator
274 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
275 * mapping. Some situations may arise where the disk is not
276 * bootable if this is not used.
279 * Defined by the SCSI layer. We don't really care.
284 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
285 sector_t capacity, int geom[])
289 sector_div(capacity, 255*63);
294 EXPORT_SYMBOL_GPL(ata_std_bios_param);
297 * ata_scsi_unlock_native_capacity - unlock native capacity
298 * @sdev: SCSI device to adjust device capacity for
300 * This function is called if a partition on @sdev extends beyond
301 * the end of the device. It requests EH to unlock HPA.
304 * Defined by the SCSI layer. Might sleep.
306 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
308 struct ata_port *ap = ata_shost_to_port(sdev->host);
309 struct ata_device *dev;
312 spin_lock_irqsave(ap->lock, flags);
314 dev = ata_scsi_find_dev(ap, sdev);
315 if (dev && dev->n_sectors < dev->n_native_sectors) {
316 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
317 dev->link->eh_info.action |= ATA_EH_RESET;
318 ata_port_schedule_eh(ap);
321 spin_unlock_irqrestore(ap->lock, flags);
322 ata_port_wait_eh(ap);
324 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity);
327 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
329 * @sdev: SCSI device to get identify data for
330 * @arg: User buffer area for identify data
333 * Defined by the SCSI layer. We don't really care.
336 * Zero on success, negative errno on error.
338 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
341 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
342 u16 __user *dst = arg;
348 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
351 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
352 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
355 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
356 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
359 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
360 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
367 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
368 * @scsidev: Device to which we are issuing command
369 * @arg: User provided data for issuing command
372 * Defined by the SCSI layer. We don't really care.
375 * Zero on success, negative errno on error.
377 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
380 u8 sensebuf[SCSI_SENSE_BUFFERSIZE];
381 u8 scsi_cmd[MAX_COMMAND_SIZE];
382 u8 args[4], *argbuf = NULL;
384 struct scsi_sense_hdr sshdr;
385 const struct scsi_exec_args exec_args = {
388 .sense_len = sizeof(sensebuf),
395 if (copy_from_user(args, arg, sizeof(args)))
398 memset(sensebuf, 0, sizeof(sensebuf));
399 memset(scsi_cmd, 0, sizeof(scsi_cmd));
402 argsize = ATA_SECT_SIZE * args[3];
403 argbuf = kmalloc(argsize, GFP_KERNEL);
404 if (argbuf == NULL) {
409 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
410 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
411 block count in sector count field */
413 scsi_cmd[1] = (3 << 1); /* Non-data */
414 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
417 scsi_cmd[0] = ATA_16;
419 scsi_cmd[4] = args[2];
420 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
421 scsi_cmd[6] = args[3];
422 scsi_cmd[8] = args[1];
423 scsi_cmd[10] = ATA_SMART_LBAM_PASS;
424 scsi_cmd[12] = ATA_SMART_LBAH_PASS;
426 scsi_cmd[6] = args[1];
428 scsi_cmd[14] = args[0];
430 /* Good values for timeout and retries? Values below
431 from scsi_ioctl_send_command() for default case... */
432 cmd_result = scsi_execute_cmd(scsidev, scsi_cmd, REQ_OP_DRV_IN, argbuf,
433 argsize, 10 * HZ, 5, &exec_args);
434 if (cmd_result < 0) {
438 if (scsi_sense_valid(&sshdr)) {/* sense data available */
439 u8 *desc = sensebuf + 8;
441 /* If we set cc then ATA pass-through will cause a
442 * check condition even if no error. Filter that. */
443 if (scsi_status_is_check_condition(cmd_result)) {
444 if (sshdr.sense_key == RECOVERED_ERROR &&
445 sshdr.asc == 0 && sshdr.ascq == 0x1d)
446 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
449 /* Send userspace a few ATA registers (same as drivers/ide) */
450 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
451 desc[0] == 0x09) { /* code is "ATA Descriptor" */
452 args[0] = desc[13]; /* status */
453 args[1] = desc[3]; /* error */
454 args[2] = desc[5]; /* sector count (0:7) */
455 if (copy_to_user(arg, args, sizeof(args)))
467 && copy_to_user(arg + sizeof(args), argbuf, argsize))
475 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
476 * @scsidev: Device to which we are issuing command
477 * @arg: User provided data for issuing command
480 * Defined by the SCSI layer. We don't really care.
483 * Zero on success, negative errno on error.
485 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
488 u8 sensebuf[SCSI_SENSE_BUFFERSIZE];
489 u8 scsi_cmd[MAX_COMMAND_SIZE];
491 struct scsi_sense_hdr sshdr;
493 const struct scsi_exec_args exec_args = {
496 .sense_len = sizeof(sensebuf),
502 if (copy_from_user(args, arg, sizeof(args)))
505 memset(sensebuf, 0, sizeof(sensebuf));
506 memset(scsi_cmd, 0, sizeof(scsi_cmd));
507 scsi_cmd[0] = ATA_16;
508 scsi_cmd[1] = (3 << 1); /* Non-data */
509 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
510 scsi_cmd[4] = args[1];
511 scsi_cmd[6] = args[2];
512 scsi_cmd[8] = args[3];
513 scsi_cmd[10] = args[4];
514 scsi_cmd[12] = args[5];
515 scsi_cmd[13] = args[6] & 0x4f;
516 scsi_cmd[14] = args[0];
518 /* Good values for timeout and retries? Values below
519 from scsi_ioctl_send_command() for default case... */
520 cmd_result = scsi_execute_cmd(scsidev, scsi_cmd, REQ_OP_DRV_IN, NULL,
521 0, 10 * HZ, 5, &exec_args);
522 if (cmd_result < 0) {
526 if (scsi_sense_valid(&sshdr)) {/* sense data available */
527 u8 *desc = sensebuf + 8;
529 /* If we set cc then ATA pass-through will cause a
530 * check condition even if no error. Filter that. */
531 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
532 if (sshdr.sense_key == RECOVERED_ERROR &&
533 sshdr.asc == 0 && sshdr.ascq == 0x1d)
534 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
537 /* Send userspace ATA registers */
538 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
539 desc[0] == 0x09) {/* code is "ATA Descriptor" */
540 args[0] = desc[13]; /* status */
541 args[1] = desc[3]; /* error */
542 args[2] = desc[5]; /* sector count (0:7) */
543 args[3] = desc[7]; /* lbal */
544 args[4] = desc[9]; /* lbam */
545 args[5] = desc[11]; /* lbah */
546 args[6] = desc[12]; /* select */
547 if (copy_to_user(arg, args, sizeof(args)))
561 static bool ata_ioc32(struct ata_port *ap)
563 if (ap->flags & ATA_FLAG_PIO_DMA)
565 if (ap->pflags & ATA_PFLAG_PIO32)
571 * This handles both native and compat commands, so anything added
572 * here must have a compatible argument, or check in_compat_syscall()
574 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
575 unsigned int cmd, void __user *arg)
583 spin_lock_irqsave(ap->lock, flags);
585 spin_unlock_irqrestore(ap->lock, flags);
587 if (in_compat_syscall())
588 return put_user(val, (compat_ulong_t __user *)arg);
590 return put_user(val, (unsigned long __user *)arg);
593 val = (unsigned long) arg;
595 spin_lock_irqsave(ap->lock, flags);
596 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
598 ap->pflags |= ATA_PFLAG_PIO32;
600 ap->pflags &= ~ATA_PFLAG_PIO32;
602 if (val != ata_ioc32(ap))
605 spin_unlock_irqrestore(ap->lock, flags);
608 case HDIO_GET_IDENTITY:
609 return ata_get_identity(ap, scsidev, arg);
612 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
614 return ata_cmd_ioctl(scsidev, arg);
616 case HDIO_DRIVE_TASK:
617 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
619 return ata_task_ioctl(scsidev, arg);
628 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
630 int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd,
633 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
636 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
639 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
640 * @dev: ATA device to which the new command is attached
641 * @cmd: SCSI command that originated this ATA command
643 * Obtain a reference to an unused ata_queued_cmd structure,
644 * which is the basic libata structure representing a single
645 * ATA command sent to the hardware.
647 * If a command was available, fill in the SCSI-specific
648 * portions of the structure with information on the
652 * spin_lock_irqsave(host lock)
655 * Command allocated, or %NULL if none available.
657 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
658 struct scsi_cmnd *cmd)
660 struct ata_port *ap = dev->link->ap;
661 struct ata_queued_cmd *qc;
664 if (unlikely(ata_port_is_frozen(ap)))
667 if (ap->flags & ATA_FLAG_SAS_HOST) {
669 * SAS hosts may queue > ATA_MAX_QUEUE commands so use
670 * unique per-device budget token as a tag.
672 if (WARN_ON_ONCE(cmd->budget_token >= ATA_MAX_QUEUE))
674 tag = cmd->budget_token;
676 tag = scsi_cmd_to_rq(cmd)->tag;
679 qc = __ata_qc_from_tag(ap, tag);
680 qc->tag = qc->hw_tag = tag;
687 qc->scsidone = scsi_done;
689 qc->sg = scsi_sglist(cmd);
690 qc->n_elem = scsi_sg_count(cmd);
692 if (scsi_cmd_to_rq(cmd)->rq_flags & RQF_QUIET)
693 qc->flags |= ATA_QCFLAG_QUIET;
698 set_host_byte(cmd, DID_OK);
699 set_status_byte(cmd, SAM_STAT_TASK_SET_FULL);
704 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
706 struct scsi_cmnd *scmd = qc->scsicmd;
708 qc->extrabytes = scmd->extra_len;
709 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
713 * ata_to_sense_error - convert ATA error to SCSI error
714 * @id: ATA device number
715 * @drv_stat: value contained in ATA status register
716 * @drv_err: value contained in ATA error register
717 * @sk: the sense key we'll fill out
718 * @asc: the additional sense code we'll fill out
719 * @ascq: the additional sense code qualifier we'll fill out
721 * Converts an ATA error into a SCSI error. Fill out pointers to
722 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
723 * format sense blocks.
726 * spin_lock_irqsave(host lock)
728 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
733 /* Based on the 3ware driver translation table */
734 static const unsigned char sense_table[][4] = {
736 {0xd1, ABORTED_COMMAND, 0x00, 0x00},
737 // Device busy Aborted command
739 {0xd0, ABORTED_COMMAND, 0x00, 0x00},
740 // Device busy Aborted command
742 {0x61, HARDWARE_ERROR, 0x00, 0x00},
743 // Device fault Hardware error
744 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
745 {0x84, ABORTED_COMMAND, 0x47, 0x00},
746 // Data CRC error SCSI parity error
747 /* MC|ID|ABRT|TRK0|MARK */
748 {0x37, NOT_READY, 0x04, 0x00},
749 // Unit offline Not ready
751 {0x09, NOT_READY, 0x04, 0x00},
752 // Unrecovered disk error Not ready
753 /* Bad address mark */
754 {0x01, MEDIUM_ERROR, 0x13, 0x00},
755 // Address mark not found for data field
756 /* TRK0 - Track 0 not found */
757 {0x02, HARDWARE_ERROR, 0x00, 0x00},
759 /* Abort: 0x04 is not translated here, see below */
760 /* Media change request */
761 {0x08, NOT_READY, 0x04, 0x00},
762 // FIXME: faking offline
763 /* SRV/IDNF - ID not found */
764 {0x10, ILLEGAL_REQUEST, 0x21, 0x00},
765 // Logical address out of range
766 /* MC - Media Changed */
767 {0x20, UNIT_ATTENTION, 0x28, 0x00},
768 // Not ready to ready change, medium may have changed
769 /* ECC - Uncorrectable ECC error */
770 {0x40, MEDIUM_ERROR, 0x11, 0x04},
771 // Unrecovered read error
772 /* BBD - block marked bad */
773 {0x80, MEDIUM_ERROR, 0x11, 0x04},
774 // Block marked bad Medium error, unrecovered read error
775 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
777 static const unsigned char stat_table[][4] = {
778 /* Must be first because BUSY means no other bits valid */
779 {0x80, ABORTED_COMMAND, 0x47, 0x00},
780 // Busy, fake parity for now
781 {0x40, ILLEGAL_REQUEST, 0x21, 0x04},
782 // Device ready, unaligned write command
783 {0x20, HARDWARE_ERROR, 0x44, 0x00},
784 // Device fault, internal target failure
785 {0x08, ABORTED_COMMAND, 0x47, 0x00},
786 // Timed out in xfer, fake parity for now
787 {0x04, RECOVERED_ERROR, 0x11, 0x00},
788 // Recovered ECC error Medium error, recovered
789 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
793 * Is this an error we can process/parse
795 if (drv_stat & ATA_BUSY) {
796 drv_err = 0; /* Ignore the err bits, they're invalid */
800 /* Look for drv_err */
801 for (i = 0; sense_table[i][0] != 0xFF; i++) {
802 /* Look for best matches first */
803 if ((sense_table[i][0] & drv_err) ==
805 *sk = sense_table[i][1];
806 *asc = sense_table[i][2];
807 *ascq = sense_table[i][3];
814 * Fall back to interpreting status bits. Note that if the drv_err
815 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
816 * is not descriptive enough.
818 for (i = 0; stat_table[i][0] != 0xFF; i++) {
819 if (stat_table[i][0] & drv_stat) {
820 *sk = stat_table[i][1];
821 *asc = stat_table[i][2];
822 *ascq = stat_table[i][3];
828 * We need a sensible error return here, which is tricky, and one
829 * that won't cause people to do things like return a disk wrongly.
831 *sk = ABORTED_COMMAND;
837 * ata_gen_passthru_sense - Generate check condition sense block.
838 * @qc: Command that completed.
840 * This function is specific to the ATA descriptor format sense
841 * block specified for the ATA pass through commands. Regardless
842 * of whether the command errored or not, return a sense
843 * block. Copy all controller registers into the sense
844 * block. If there was no error, we get the request from an ATA
845 * passthrough command, so we use the following sense data:
846 * sk = RECOVERED ERROR
847 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
853 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
855 struct scsi_cmnd *cmd = qc->scsicmd;
856 struct ata_taskfile *tf = &qc->result_tf;
857 unsigned char *sb = cmd->sense_buffer;
858 unsigned char *desc = sb + 8;
859 u8 sense_key, asc, ascq;
861 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
864 * Use ata_to_sense_error() to map status register bits
865 * onto sense key, asc & ascq.
868 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
869 ata_to_sense_error(qc->ap->print_id, tf->status, tf->error,
870 &sense_key, &asc, &ascq);
871 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq);
874 * ATA PASS-THROUGH INFORMATION AVAILABLE
875 * Always in descriptor format sense.
877 scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D);
880 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) {
883 /* descriptor format */
885 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9);
887 if (SCSI_SENSE_BUFFERSIZE < len + 14)
895 * Copy registers into sense buffer.
903 desc[12] = tf->device;
904 desc[13] = tf->status;
907 * Fill in Extend bit, and the high order bytes
910 if (tf->flags & ATA_TFLAG_LBA48) {
912 desc[4] = tf->hob_nsect;
913 desc[6] = tf->hob_lbal;
914 desc[8] = tf->hob_lbam;
915 desc[10] = tf->hob_lbah;
918 /* Fixed sense format */
920 desc[1] = tf->status;
921 desc[2] = tf->device;
924 if (tf->flags & ATA_TFLAG_LBA48) {
928 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah)
938 * ata_gen_ata_sense - generate a SCSI fixed sense block
939 * @qc: Command that we are erroring out
941 * Generate sense block for a failed ATA command @qc. Descriptor
942 * format is used to accommodate LBA48 block address.
947 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
949 struct ata_device *dev = qc->dev;
950 struct scsi_cmnd *cmd = qc->scsicmd;
951 struct ata_taskfile *tf = &qc->result_tf;
952 unsigned char *sb = cmd->sense_buffer;
954 u8 sense_key, asc, ascq;
956 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
958 if (ata_dev_disabled(dev)) {
959 /* Device disabled after error recovery */
960 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
961 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21);
964 /* Use ata_to_sense_error() to map status register bits
965 * onto sense key, asc & ascq.
968 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
969 ata_to_sense_error(qc->ap->print_id, tf->status, tf->error,
970 &sense_key, &asc, &ascq);
971 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq);
973 /* Could not decode error */
974 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n",
975 tf->status, qc->err_mask);
976 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0);
980 block = ata_tf_read_block(&qc->result_tf, dev);
981 if (block == U64_MAX)
984 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block);
987 void ata_scsi_sdev_config(struct scsi_device *sdev)
989 sdev->use_10_for_rw = 1;
990 sdev->use_10_for_ms = 1;
991 sdev->no_write_same = 1;
993 /* Schedule policy is determined by ->qc_defer() callback and
994 * it needs to see every deferred qc. Set dev_blocked to 1 to
995 * prevent SCSI midlayer from automatically deferring
998 sdev->max_device_blocked = 1;
1002 * ata_scsi_dma_need_drain - Check whether data transfer may overflow
1003 * @rq: request to be checked
1005 * ATAPI commands which transfer variable length data to host
1006 * might overflow due to application error or hardware bug. This
1007 * function checks whether overflow should be drained and ignored
1014 * 1 if ; otherwise, 0.
1016 bool ata_scsi_dma_need_drain(struct request *rq)
1018 struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq);
1020 return atapi_cmd_type(scmd->cmnd[0]) == ATAPI_MISC;
1022 EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain);
1024 int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev)
1026 struct request_queue *q = sdev->request_queue;
1029 if (!ata_id_has_unload(dev->id))
1030 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1032 /* configure max sectors */
1033 dev->max_sectors = min(dev->max_sectors, sdev->host->max_sectors);
1034 blk_queue_max_hw_sectors(q, dev->max_sectors);
1036 if (dev->class == ATA_DEV_ATAPI) {
1037 sdev->sector_size = ATA_SECT_SIZE;
1039 /* set DMA padding */
1040 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1042 /* make room for appending the drain */
1043 blk_queue_max_segments(q, queue_max_segments(q) - 1);
1045 sdev->dma_drain_len = ATAPI_MAX_DRAIN;
1046 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, GFP_NOIO);
1047 if (!sdev->dma_drain_buf) {
1048 ata_dev_err(dev, "drain buffer allocation failed\n");
1052 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1055 * Ask the sd driver to issue START STOP UNIT on runtime suspend
1056 * and resume only. For system level suspend/resume, devices
1057 * power state is handled directly by libata EH.
1059 sdev->manage_runtime_start_stop = true;
1063 * ata_pio_sectors() expects buffer for each sector to not cross
1064 * page boundary. Enforce it by requiring buffers to be sector
1065 * aligned, which works iff sector_size is not larger than
1066 * PAGE_SIZE. ATAPI devices also need the alignment as
1067 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1069 if (sdev->sector_size > PAGE_SIZE)
1071 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1074 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1076 if (dev->flags & ATA_DFLAG_AN)
1077 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1079 if (ata_ncq_supported(dev))
1080 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1081 depth = min(ATA_MAX_QUEUE, depth);
1082 scsi_change_queue_depth(sdev, depth);
1084 if (dev->flags & ATA_DFLAG_TRUSTED)
1085 sdev->security_supported = 1;
1092 * ata_scsi_slave_alloc - Early setup of SCSI device
1093 * @sdev: SCSI device to examine
1095 * This is called from scsi_alloc_sdev() when the scsi device
1096 * associated with an ATA device is scanned on a port.
1099 * Defined by SCSI layer. We don't really care.
1102 int ata_scsi_slave_alloc(struct scsi_device *sdev)
1104 struct ata_port *ap = ata_shost_to_port(sdev->host);
1105 struct device_link *link;
1107 ata_scsi_sdev_config(sdev);
1110 * Create a link from the ata_port device to the scsi device to ensure
1111 * that PM does suspend/resume in the correct order: the scsi device is
1112 * consumer (child) and the ata port the supplier (parent).
1114 link = device_link_add(&sdev->sdev_gendev, &ap->tdev,
1116 DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE);
1118 ata_port_err(ap, "Failed to create link to scsi device %s\n",
1119 dev_name(&sdev->sdev_gendev));
1125 EXPORT_SYMBOL_GPL(ata_scsi_slave_alloc);
1128 * ata_scsi_slave_config - Set SCSI device attributes
1129 * @sdev: SCSI device to examine
1131 * This is called before we actually start reading
1132 * and writing to the device, to configure certain
1133 * SCSI mid-layer behaviors.
1136 * Defined by SCSI layer. We don't really care.
1139 int ata_scsi_slave_config(struct scsi_device *sdev)
1141 struct ata_port *ap = ata_shost_to_port(sdev->host);
1142 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1145 return ata_scsi_dev_config(sdev, dev);
1149 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
1152 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1153 * @sdev: SCSI device to be destroyed
1155 * @sdev is about to be destroyed for hot/warm unplugging. If
1156 * this unplugging was initiated by libata as indicated by NULL
1157 * dev->sdev, this function doesn't have to do anything.
1158 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1159 * Clear dev->sdev, schedule the device for ATA detach and invoke
1163 * Defined by SCSI layer. We don't really care.
1165 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1167 struct ata_port *ap = ata_shost_to_port(sdev->host);
1168 unsigned long flags;
1169 struct ata_device *dev;
1171 device_link_remove(&sdev->sdev_gendev, &ap->tdev);
1173 spin_lock_irqsave(ap->lock, flags);
1174 dev = __ata_scsi_find_dev(ap, sdev);
1175 if (dev && dev->sdev) {
1176 /* SCSI device already in CANCEL state, no need to offline it */
1178 dev->flags |= ATA_DFLAG_DETACH;
1179 ata_port_schedule_eh(ap);
1181 spin_unlock_irqrestore(ap->lock, flags);
1183 kfree(sdev->dma_drain_buf);
1185 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
1188 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1189 * @qc: Storage for translated ATA taskfile
1191 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1192 * (to start). Perhaps these commands should be preceded by
1193 * CHECK POWER MODE to see what power mode the device is already in.
1194 * [See SAT revision 5 at www.t10.org]
1197 * spin_lock_irqsave(host lock)
1200 * Zero on success, non-zero on error.
1202 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1204 struct scsi_cmnd *scmd = qc->scsicmd;
1205 struct ata_taskfile *tf = &qc->tf;
1206 const u8 *cdb = scmd->cmnd;
1210 if (scmd->cmd_len < 5) {
1215 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1216 tf->protocol = ATA_PROT_NODATA;
1218 ; /* ignore IMMED bit, violates sat-r05 */
1223 goto invalid_fld; /* LOEJ bit set not supported */
1225 if (((cdb[4] >> 4) & 0xf) != 0) {
1228 goto invalid_fld; /* power conditions not supported */
1232 tf->nsect = 1; /* 1 sector, lba=0 */
1234 if (qc->dev->flags & ATA_DFLAG_LBA) {
1235 tf->flags |= ATA_TFLAG_LBA;
1240 tf->device |= ATA_LBA;
1243 tf->lbal = 0x1; /* sect */
1244 tf->lbam = 0x0; /* cyl low */
1245 tf->lbah = 0x0; /* cyl high */
1248 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1250 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1251 * or S5) causing some drives to spin up and down again.
1253 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1254 system_state == SYSTEM_POWER_OFF)
1257 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1258 system_entering_hibernation())
1261 /* Issue ATA STANDBY IMMEDIATE command */
1262 tf->command = ATA_CMD_STANDBYNOW1;
1266 * Standby and Idle condition timers could be implemented but that
1267 * would require libata to implement the Power condition mode page
1268 * and allow the user to change it. Changing mode pages requires
1269 * MODE SELECT to be implemented.
1275 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
1278 scmd->result = SAM_STAT_GOOD;
1284 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1285 * @qc: Storage for translated ATA taskfile
1287 * Sets up an ATA taskfile to issue FLUSH CACHE or
1291 * spin_lock_irqsave(host lock)
1294 * Zero on success, non-zero on error.
1296 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1298 struct ata_taskfile *tf = &qc->tf;
1300 tf->flags |= ATA_TFLAG_DEVICE;
1301 tf->protocol = ATA_PROT_NODATA;
1303 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1304 tf->command = ATA_CMD_FLUSH_EXT;
1306 tf->command = ATA_CMD_FLUSH;
1308 /* flush is critical for IO integrity, consider it an IO command */
1309 qc->flags |= ATA_QCFLAG_IO;
1315 * scsi_6_lba_len - Get LBA and transfer length
1316 * @cdb: SCSI command to translate
1318 * Calculate LBA and transfer length for 6-byte commands.
1322 * @plen: the transfer length
1324 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1329 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1330 lba |= ((u64)cdb[2]) << 8;
1331 lba |= ((u64)cdb[3]);
1340 * scsi_10_lba_len - Get LBA and transfer length
1341 * @cdb: SCSI command to translate
1343 * Calculate LBA and transfer length for 10-byte commands.
1347 * @plen: the transfer length
1349 static inline void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1351 *plba = get_unaligned_be32(&cdb[2]);
1352 *plen = get_unaligned_be16(&cdb[7]);
1356 * scsi_16_lba_len - Get LBA and transfer length
1357 * @cdb: SCSI command to translate
1359 * Calculate LBA and transfer length for 16-byte commands.
1363 * @plen: the transfer length
1365 static inline void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1367 *plba = get_unaligned_be64(&cdb[2]);
1368 *plen = get_unaligned_be32(&cdb[10]);
1372 * scsi_dld - Get duration limit descriptor index
1373 * @cdb: SCSI command to translate
1375 * Returns the dld bits indicating the index of a command duration limit
1378 static inline int scsi_dld(const u8 *cdb)
1380 return ((cdb[1] & 0x01) << 2) | ((cdb[14] >> 6) & 0x03);
1384 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1385 * @qc: Storage for translated ATA taskfile
1387 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1390 * spin_lock_irqsave(host lock)
1393 * Zero on success, non-zero on error.
1395 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1397 struct scsi_cmnd *scmd = qc->scsicmd;
1398 struct ata_taskfile *tf = &qc->tf;
1399 struct ata_device *dev = qc->dev;
1400 u64 dev_sectors = qc->dev->n_sectors;
1401 const u8 *cdb = scmd->cmnd;
1406 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1407 tf->protocol = ATA_PROT_NODATA;
1411 if (scmd->cmd_len < 10) {
1415 scsi_10_lba_len(cdb, &block, &n_block);
1418 if (scmd->cmd_len < 16) {
1422 scsi_16_lba_len(cdb, &block, &n_block);
1431 if (block >= dev_sectors)
1433 if ((block + n_block) > dev_sectors)
1436 if (dev->flags & ATA_DFLAG_LBA) {
1437 tf->flags |= ATA_TFLAG_LBA;
1439 if (lba_28_ok(block, n_block)) {
1441 tf->command = ATA_CMD_VERIFY;
1442 tf->device |= (block >> 24) & 0xf;
1443 } else if (lba_48_ok(block, n_block)) {
1444 if (!(dev->flags & ATA_DFLAG_LBA48))
1448 tf->flags |= ATA_TFLAG_LBA48;
1449 tf->command = ATA_CMD_VERIFY_EXT;
1451 tf->hob_nsect = (n_block >> 8) & 0xff;
1453 tf->hob_lbah = (block >> 40) & 0xff;
1454 tf->hob_lbam = (block >> 32) & 0xff;
1455 tf->hob_lbal = (block >> 24) & 0xff;
1457 /* request too large even for LBA48 */
1460 tf->nsect = n_block & 0xff;
1462 tf->lbah = (block >> 16) & 0xff;
1463 tf->lbam = (block >> 8) & 0xff;
1464 tf->lbal = block & 0xff;
1466 tf->device |= ATA_LBA;
1469 u32 sect, head, cyl, track;
1471 if (!lba_28_ok(block, n_block))
1474 /* Convert LBA to CHS */
1475 track = (u32)block / dev->sectors;
1476 cyl = track / dev->heads;
1477 head = track % dev->heads;
1478 sect = (u32)block % dev->sectors + 1;
1480 /* Check whether the converted CHS can fit.
1484 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1487 tf->command = ATA_CMD_VERIFY;
1488 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1491 tf->lbah = cyl >> 8;
1498 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1502 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1503 /* "Logical Block Address out of range" */
1507 scmd->result = SAM_STAT_GOOD;
1511 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks)
1513 struct request *rq = scsi_cmd_to_rq(scmd);
1516 if (!blk_rq_is_passthrough(rq))
1519 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size;
1520 if (n_blocks > req_blocks)
1527 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1528 * @qc: Storage for translated ATA taskfile
1530 * Converts any of six SCSI read/write commands into the
1531 * ATA counterpart, including starting sector (LBA),
1532 * sector count, and taking into account the device's LBA48
1535 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1536 * %WRITE_16 are currently supported.
1539 * spin_lock_irqsave(host lock)
1542 * Zero on success, non-zero on error.
1544 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1546 struct scsi_cmnd *scmd = qc->scsicmd;
1547 const u8 *cdb = scmd->cmnd;
1548 struct request *rq = scsi_cmd_to_rq(scmd);
1549 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
1550 unsigned int tf_flags = 0;
1561 tf_flags |= ATA_TFLAG_WRITE;
1565 /* Calculate the SCSI LBA, transfer length and FUA. */
1569 if (unlikely(scmd->cmd_len < 10)) {
1573 scsi_10_lba_len(cdb, &block, &n_block);
1574 if (cdb[1] & (1 << 3))
1575 tf_flags |= ATA_TFLAG_FUA;
1576 if (!ata_check_nblocks(scmd, n_block))
1581 if (unlikely(scmd->cmd_len < 6)) {
1585 scsi_6_lba_len(cdb, &block, &n_block);
1587 /* for 6-byte r/w commands, transfer length 0
1588 * means 256 blocks of data, not 0 block.
1592 if (!ata_check_nblocks(scmd, n_block))
1597 if (unlikely(scmd->cmd_len < 16)) {
1601 scsi_16_lba_len(cdb, &block, &n_block);
1602 dld = scsi_dld(cdb);
1603 if (cdb[1] & (1 << 3))
1604 tf_flags |= ATA_TFLAG_FUA;
1605 if (!ata_check_nblocks(scmd, n_block))
1613 /* Check and compose ATA command */
1615 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1616 * length 0 means transfer 0 block of data.
1617 * However, for ATA R/W commands, sector count 0 means
1618 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1620 * WARNING: one or two older ATA drives treat 0 as 0...
1624 qc->flags |= ATA_QCFLAG_IO;
1625 qc->nbytes = n_block * scmd->device->sector_size;
1627 rc = ata_build_rw_tf(qc, block, n_block, tf_flags, dld, class);
1628 if (likely(rc == 0))
1633 /* treat all other errors as -EINVAL, fall through */
1635 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1639 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1640 /* "Logical Block Address out of range" */
1644 scmd->result = SAM_STAT_GOOD;
1648 static void ata_qc_done(struct ata_queued_cmd *qc)
1650 struct scsi_cmnd *cmd = qc->scsicmd;
1651 void (*done)(struct scsi_cmnd *) = qc->scsidone;
1657 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1659 struct scsi_cmnd *cmd = qc->scsicmd;
1660 u8 *cdb = cmd->cmnd;
1661 int need_sense = (qc->err_mask != 0) &&
1662 !(qc->flags & ATA_QCFLAG_SENSE_VALID);
1664 /* For ATA pass thru (SAT) commands, generate a sense block if
1665 * user mandated it or if there's an error. Note that if we
1666 * generate because the user forced us to [CK_COND =1], a check
1667 * condition is generated and the ATA register values are returned
1668 * whether the command completed successfully or not. If there
1669 * was no error, we use the following sense data:
1670 * sk = RECOVERED ERROR
1671 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1673 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1674 ((cdb[2] & 0x20) || need_sense))
1675 ata_gen_passthru_sense(qc);
1676 else if (need_sense)
1677 ata_gen_ata_sense(qc);
1679 /* Keep the SCSI ML and status byte, clear host byte. */
1680 cmd->result &= 0x0000ffff;
1686 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1687 * @dev: ATA device to which the command is addressed
1688 * @cmd: SCSI command to execute
1689 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1691 * Our ->queuecommand() function has decided that the SCSI
1692 * command issued can be directly translated into an ATA
1693 * command, rather than handled internally.
1695 * This function sets up an ata_queued_cmd structure for the
1696 * SCSI command, and sends that ata_queued_cmd to the hardware.
1698 * The xlat_func argument (actor) returns 0 if ready to execute
1699 * ATA command, else 1 to finish translation. If 1 is returned
1700 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1701 * to be set reflecting an error condition or clean (early)
1705 * spin_lock_irqsave(host lock)
1708 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1709 * needs to be deferred.
1711 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1712 ata_xlat_func_t xlat_func)
1714 struct ata_port *ap = dev->link->ap;
1715 struct ata_queued_cmd *qc;
1718 qc = ata_scsi_qc_new(dev, cmd);
1722 /* data is present; dma-map it */
1723 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1724 cmd->sc_data_direction == DMA_TO_DEVICE) {
1725 if (unlikely(scsi_bufflen(cmd) < 1)) {
1726 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
1730 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1732 qc->dma_dir = cmd->sc_data_direction;
1735 qc->complete_fn = ata_scsi_qc_complete;
1740 if (ap->ops->qc_defer) {
1741 if ((rc = ap->ops->qc_defer(qc)))
1745 /* select device, send command to hardware */
1757 cmd->result = (DID_ERROR << 16);
1764 if (rc == ATA_DEFER_LINK)
1765 return SCSI_MLQUEUE_DEVICE_BUSY;
1767 return SCSI_MLQUEUE_HOST_BUSY;
1770 struct ata_scsi_args {
1771 struct ata_device *dev;
1773 struct scsi_cmnd *cmd;
1777 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1778 * @args: device IDENTIFY data / SCSI command of interest.
1779 * @actor: Callback hook for desired SCSI command simulator
1781 * Takes care of the hard work of simulating a SCSI command...
1782 * Mapping the response buffer, calling the command's handler,
1783 * and handling the handler's return value. This return value
1784 * indicates whether the handler wishes the SCSI command to be
1785 * completed successfully (0), or not (in which case cmd->result
1786 * and sense buffer are assumed to be set).
1789 * spin_lock_irqsave(host lock)
1791 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1792 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1795 struct scsi_cmnd *cmd = args->cmd;
1796 unsigned long flags;
1798 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
1800 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1801 rc = actor(args, ata_scsi_rbuf);
1803 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1804 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1806 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
1809 cmd->result = SAM_STAT_GOOD;
1813 * ata_scsiop_inq_std - Simulate INQUIRY command
1814 * @args: device IDENTIFY data / SCSI command of interest.
1815 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1817 * Returns standard device identification data associated
1818 * with non-VPD INQUIRY command output.
1821 * spin_lock_irqsave(host lock)
1823 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1825 static const u8 versions[] = {
1827 0x60, /* SAM-3 (no version claimed) */
1830 0x20, /* SBC-2 (no version claimed) */
1833 0x00 /* SPC-3 (no version claimed) */
1835 static const u8 versions_zbc[] = {
1837 0xA0, /* SAM-5 (no version claimed) */
1840 0x00, /* SBC-4 (no version claimed) */
1843 0xC0, /* SPC-5 (no version claimed) */
1852 0x5, /* claim SPC-3 version compatibility */
1860 /* set scsi removable (RMB) bit per ata bit, or if the
1861 * AHCI port says it's external (Hotplug-capable, eSATA).
1863 if (ata_id_removable(args->id) ||
1864 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL))
1867 if (args->dev->class == ATA_DEV_ZAC) {
1869 hdr[2] = 0x7; /* claim SPC-5 version compatibility */
1872 if (args->dev->flags & ATA_DFLAG_CDL)
1873 hdr[2] = 0xd; /* claim SPC-6 version compatibility */
1875 memcpy(rbuf, hdr, sizeof(hdr));
1876 memcpy(&rbuf[8], "ATA ", 8);
1877 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1879 /* From SAT, use last 2 words from fw rev unless they are spaces */
1880 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
1881 if (strncmp(&rbuf[32], " ", 4) == 0)
1882 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1884 if (rbuf[32] == 0 || rbuf[32] == ' ')
1885 memcpy(&rbuf[32], "n/a ", 4);
1887 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC)
1888 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc));
1890 memcpy(rbuf + 58, versions, sizeof(versions));
1896 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1897 * @args: device IDENTIFY data / SCSI command of interest.
1898 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1900 * Returns list of inquiry VPD pages available.
1903 * spin_lock_irqsave(host lock)
1905 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1907 int i, num_pages = 0;
1908 static const u8 pages[] = {
1909 0x00, /* page 0x00, this page */
1910 0x80, /* page 0x80, unit serial no page */
1911 0x83, /* page 0x83, device ident page */
1912 0x89, /* page 0x89, ata info page */
1913 0xb0, /* page 0xb0, block limits page */
1914 0xb1, /* page 0xb1, block device characteristics page */
1915 0xb2, /* page 0xb2, thin provisioning page */
1916 0xb6, /* page 0xb6, zoned block device characteristics */
1917 0xb9, /* page 0xb9, concurrent positioning ranges */
1920 for (i = 0; i < sizeof(pages); i++) {
1921 if (pages[i] == 0xb6 &&
1922 !(args->dev->flags & ATA_DFLAG_ZAC))
1924 rbuf[num_pages + 4] = pages[i];
1927 rbuf[3] = num_pages; /* number of supported VPD pages */
1932 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1933 * @args: device IDENTIFY data / SCSI command of interest.
1934 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1936 * Returns ATA device serial number.
1939 * spin_lock_irqsave(host lock)
1941 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
1943 static const u8 hdr[] = {
1945 0x80, /* this page code */
1947 ATA_ID_SERNO_LEN, /* page len */
1950 memcpy(rbuf, hdr, sizeof(hdr));
1951 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1952 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1957 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1958 * @args: device IDENTIFY data / SCSI command of interest.
1959 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1961 * Yields two logical unit device identification designators:
1962 * - vendor specific ASCII containing the ATA serial number
1963 * - SAT defined "t10 vendor id based" containing ASCII vendor
1964 * name ("ATA "), model and serial numbers.
1967 * spin_lock_irqsave(host lock)
1969 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
1971 const int sat_model_serial_desc_len = 68;
1974 rbuf[1] = 0x83; /* this page code */
1977 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1979 rbuf[num + 3] = ATA_ID_SERNO_LEN;
1981 ata_id_string(args->id, (unsigned char *) rbuf + num,
1982 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1983 num += ATA_ID_SERNO_LEN;
1985 /* SAT defined lu model and serial numbers descriptor */
1986 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1989 rbuf[num + 3] = sat_model_serial_desc_len;
1991 memcpy(rbuf + num, "ATA ", 8);
1993 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
1995 num += ATA_ID_PROD_LEN;
1996 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
1998 num += ATA_ID_SERNO_LEN;
2000 if (ata_id_has_wwn(args->id)) {
2001 /* SAT defined lu world wide name */
2002 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2005 rbuf[num + 3] = ATA_ID_WWN_LEN;
2007 ata_id_string(args->id, (unsigned char *) rbuf + num,
2008 ATA_ID_WWN, ATA_ID_WWN_LEN);
2009 num += ATA_ID_WWN_LEN;
2011 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2016 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2017 * @args: device IDENTIFY data / SCSI command of interest.
2018 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2020 * Yields SAT-specified ATA VPD page.
2023 * spin_lock_irqsave(host lock)
2025 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2027 rbuf[1] = 0x89; /* our page code */
2028 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2029 rbuf[3] = (0x238 & 0xff);
2031 memcpy(&rbuf[8], "linux ", 8);
2032 memcpy(&rbuf[16], "libata ", 16);
2033 memcpy(&rbuf[32], DRV_VERSION, 4);
2035 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2036 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */
2039 /* we don't store the ATA device signature, so we fake it */
2040 rbuf[38] = ATA_DRDY; /* really, this is Status reg */
2044 rbuf[56] = ATA_CMD_ID_ATA;
2046 memcpy(&rbuf[60], &args->id[0], 512);
2050 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2052 struct ata_device *dev = args->dev;
2056 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2059 * Optimal transfer length granularity.
2061 * This is always one physical block, but for disks with a smaller
2062 * logical than physical sector size we need to figure out what the
2065 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2066 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2069 * Optimal unmap granularity.
2071 * The ATA spec doesn't even know about a granularity or alignment
2072 * for the TRIM command. We can leave away most of the unmap related
2073 * VPD page entries, but we have specifify a granularity to signal
2074 * that we support some form of unmap - in thise case via WRITE SAME
2075 * with the unmap bit set.
2077 if (ata_id_has_trim(args->id)) {
2078 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM;
2080 if (dev->horkage & ATA_HORKAGE_MAX_TRIM_128M)
2081 max_blocks = 128 << (20 - SECTOR_SHIFT);
2083 put_unaligned_be64(max_blocks, &rbuf[36]);
2084 put_unaligned_be32(1, &rbuf[28]);
2090 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2092 int form_factor = ata_id_form_factor(args->id);
2093 int media_rotation_rate = ata_id_rotation_rate(args->id);
2094 u8 zoned = ata_id_zoned_cap(args->id);
2098 rbuf[4] = media_rotation_rate >> 8;
2099 rbuf[5] = media_rotation_rate;
2100 rbuf[7] = form_factor;
2102 rbuf[8] = (zoned << 4);
2107 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2109 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2112 rbuf[5] = 1 << 6; /* TPWS */
2117 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf)
2120 * zbc-r05 SCSI Zoned Block device characteristics VPD page
2126 * URSWRZ bit is only meaningful for host-managed ZAC drives
2128 if (args->dev->zac_zoned_cap & 1)
2130 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]);
2131 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]);
2132 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]);
2137 static unsigned int ata_scsiop_inq_b9(struct ata_scsi_args *args, u8 *rbuf)
2139 struct ata_cpr_log *cpr_log = args->dev->cpr_log;
2140 u8 *desc = &rbuf[64];
2143 /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */
2145 put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[2]);
2147 for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) {
2148 desc[0] = cpr_log->cpr[i].num;
2149 desc[1] = cpr_log->cpr[i].num_storage_elements;
2150 put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]);
2151 put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]);
2158 * modecpy - Prepare response for MODE SENSE
2159 * @dest: output buffer
2160 * @src: data being copied
2161 * @n: length of mode page
2162 * @changeable: whether changeable parameters are requested
2164 * Generate a generic MODE SENSE page for either current or changeable
2170 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2173 memcpy(dest, src, 2);
2174 memset(dest + 2, 0, n - 2);
2176 memcpy(dest, src, n);
2181 * ata_msense_caching - Simulate MODE SENSE caching info page
2182 * @id: device IDENTIFY data
2183 * @buf: output buffer
2184 * @changeable: whether changeable parameters are requested
2186 * Generate a caching info page, which conditionally indicates
2187 * write caching to the SCSI layer, depending on device
2193 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2195 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2197 buf[2] |= (1 << 2); /* ata_mselect_caching() */
2199 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */
2200 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */
2202 return sizeof(def_cache_mpage);
2206 * Simulate MODE SENSE control mode page, sub-page 0.
2208 static unsigned int ata_msense_control_spg0(struct ata_device *dev, u8 *buf,
2211 modecpy(buf, def_control_mpage,
2212 sizeof(def_control_mpage), changeable);
2214 /* ata_mselect_control() */
2217 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
2219 /* descriptor format sense data */
2220 buf[2] |= (d_sense << 2);
2223 return sizeof(def_control_mpage);
2227 * Translate an ATA duration limit in microseconds to a SCSI duration limit
2228 * using the t2cdlunits 0xa (10ms). Since the SCSI duration limits are 2-bytes
2229 * only, take care of overflows.
2231 static inline u16 ata_xlat_cdl_limit(u8 *buf)
2233 u32 limit = get_unaligned_le32(buf);
2235 return min_t(u32, limit / 10000, 65535);
2239 * Simulate MODE SENSE control mode page, sub-pages 07h and 08h
2240 * (command duration limits T2A and T2B mode pages).
2242 static unsigned int ata_msense_control_spgt2(struct ata_device *dev, u8 *buf,
2245 u8 *b, *cdl = dev->cdl, *desc;
2250 * Fill the subpage. The first four bytes of the T2A/T2B mode pages
2251 * are a header. The PAGE LENGTH field is the size of the page
2252 * excluding the header.
2254 buf[0] = CONTROL_MPAGE;
2256 put_unaligned_be16(CDL_T2_SUB_MPAGE_LEN - 4, &buf[2]);
2257 if (spg == CDL_T2A_SUB_MPAGE) {
2259 * Read descriptors map to the T2A page:
2260 * set perf_vs_duration_guidleine.
2262 buf[7] = (cdl[0] & 0x03) << 4;
2265 /* Write descriptors map to the T2B page */
2269 /* Fill the T2 page descriptors */
2271 policy = get_unaligned_le32(&cdl[0]);
2272 for (i = 0; i < 7; i++, b += 32, desc += 32) {
2273 /* t2cdlunits: fixed to 10ms */
2276 /* Max inactive time and its policy */
2277 put_unaligned_be16(ata_xlat_cdl_limit(&desc[8]), &b[2]);
2278 b[6] = ((policy >> 8) & 0x0f) << 4;
2280 /* Max active time and its policy */
2281 put_unaligned_be16(ata_xlat_cdl_limit(&desc[4]), &b[4]);
2282 b[6] |= (policy >> 4) & 0x0f;
2284 /* Command duration guideline and its policy */
2285 put_unaligned_be16(ata_xlat_cdl_limit(&desc[16]), &b[10]);
2286 b[14] = policy & 0x0f;
2289 return CDL_T2_SUB_MPAGE_LEN;
2293 * Simulate MODE SENSE control mode page, sub-page f2h
2294 * (ATA feature control mode page).
2296 static unsigned int ata_msense_control_ata_feature(struct ata_device *dev,
2300 buf[0] = CONTROL_MPAGE | (1 << 6);
2301 buf[1] = ATA_FEATURE_SUB_MPAGE;
2304 * The first four bytes of ATA Feature Control mode page are a header.
2305 * The PAGE LENGTH field is the size of the page excluding the header.
2307 put_unaligned_be16(ATA_FEATURE_SUB_MPAGE_LEN - 4, &buf[2]);
2309 if (dev->flags & ATA_DFLAG_CDL)
2310 buf[4] = 0x02; /* Support T2A and T2B pages */
2314 return ATA_FEATURE_SUB_MPAGE_LEN;
2318 * ata_msense_control - Simulate MODE SENSE control mode page
2319 * @dev: ATA device of interest
2320 * @buf: output buffer
2321 * @spg: sub-page code
2322 * @changeable: whether changeable parameters are requested
2324 * Generate a generic MODE SENSE control mode page.
2329 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf,
2330 u8 spg, bool changeable)
2336 return ata_msense_control_spg0(dev, buf, changeable);
2337 case CDL_T2A_SUB_MPAGE:
2338 case CDL_T2B_SUB_MPAGE:
2339 return ata_msense_control_spgt2(dev, buf, spg);
2340 case ATA_FEATURE_SUB_MPAGE:
2341 return ata_msense_control_ata_feature(dev, buf);
2342 case ALL_SUB_MPAGES:
2343 n = ata_msense_control_spg0(dev, buf, changeable);
2344 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE);
2345 n += ata_msense_control_spgt2(dev, buf + n, CDL_T2A_SUB_MPAGE);
2346 n += ata_msense_control_ata_feature(dev, buf + n);
2354 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2355 * @buf: output buffer
2356 * @changeable: whether changeable parameters are requested
2358 * Generate a generic MODE SENSE r/w error recovery page.
2363 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2365 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2367 return sizeof(def_rw_recovery_mpage);
2371 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2372 * @args: device IDENTIFY data / SCSI command of interest.
2373 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2375 * Simulate MODE SENSE commands. Assume this is invoked for direct
2376 * access devices (e.g. disks) only. There should be no block
2377 * descriptor for other device types.
2380 * spin_lock_irqsave(host lock)
2382 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2384 struct ata_device *dev = args->dev;
2385 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2386 static const u8 sat_blk_desc[] = {
2387 0, 0, 0, 0, /* number of blocks: sat unspecified */
2389 0, 0x2, 0x0 /* block length: 512 bytes */
2392 unsigned int ebd, page_control, six_byte;
2393 u8 dpofua = 0, bp = 0xff;
2396 six_byte = (scsicmd[0] == MODE_SENSE);
2397 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2399 * LLBA bit in msense(10) ignored (compliant)
2402 page_control = scsicmd[2] >> 6;
2403 switch (page_control) {
2404 case 0: /* current */
2405 case 1: /* changeable */
2406 case 2: /* defaults */
2407 break; /* supported */
2409 goto saving_not_supp;
2417 p += 4 + (ebd ? 8 : 0);
2419 p += 8 + (ebd ? 8 : 0);
2421 pg = scsicmd[2] & 0x3f;
2425 * Supported subpages: all subpages and sub-pages 07h, 08h and f2h of
2430 case ALL_SUB_MPAGES:
2432 case CDL_T2A_SUB_MPAGE:
2433 case CDL_T2B_SUB_MPAGE:
2434 case ATA_FEATURE_SUB_MPAGE:
2435 if (dev->flags & ATA_DFLAG_CDL && pg == CONTROL_MPAGE)
2445 case RW_RECOVERY_MPAGE:
2446 p += ata_msense_rw_recovery(p, page_control == 1);
2450 p += ata_msense_caching(args->id, p, page_control == 1);
2454 p += ata_msense_control(args->dev, p, spg, page_control == 1);
2458 p += ata_msense_rw_recovery(p, page_control == 1);
2459 p += ata_msense_caching(args->id, p, page_control == 1);
2460 p += ata_msense_control(args->dev, p, spg, page_control == 1);
2463 default: /* invalid page code */
2468 if (dev->flags & ATA_DFLAG_FUA)
2472 rbuf[0] = p - rbuf - 1;
2475 rbuf[3] = sizeof(sat_blk_desc);
2476 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2479 put_unaligned_be16(p - rbuf - 2, &rbuf[0]);
2482 rbuf[7] = sizeof(sat_blk_desc);
2483 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2489 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp);
2493 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2494 /* "Saving parameters not supported" */
2499 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2500 * @args: device IDENTIFY data / SCSI command of interest.
2501 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2503 * Simulate READ CAPACITY commands.
2508 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2510 struct ata_device *dev = args->dev;
2511 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2512 u32 sector_size; /* physical sector size in bytes */
2516 sector_size = ata_id_logical_sector_size(dev->id);
2517 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2518 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2520 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2521 if (last_lba >= 0xffffffffULL)
2522 last_lba = 0xffffffff;
2524 /* sector count, 32-bit */
2525 rbuf[0] = last_lba >> (8 * 3);
2526 rbuf[1] = last_lba >> (8 * 2);
2527 rbuf[2] = last_lba >> (8 * 1);
2531 rbuf[4] = sector_size >> (8 * 3);
2532 rbuf[5] = sector_size >> (8 * 2);
2533 rbuf[6] = sector_size >> (8 * 1);
2534 rbuf[7] = sector_size;
2536 /* sector count, 64-bit */
2537 rbuf[0] = last_lba >> (8 * 7);
2538 rbuf[1] = last_lba >> (8 * 6);
2539 rbuf[2] = last_lba >> (8 * 5);
2540 rbuf[3] = last_lba >> (8 * 4);
2541 rbuf[4] = last_lba >> (8 * 3);
2542 rbuf[5] = last_lba >> (8 * 2);
2543 rbuf[6] = last_lba >> (8 * 1);
2547 rbuf[ 8] = sector_size >> (8 * 3);
2548 rbuf[ 9] = sector_size >> (8 * 2);
2549 rbuf[10] = sector_size >> (8 * 1);
2550 rbuf[11] = sector_size;
2553 rbuf[13] = log2_per_phys;
2554 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2555 rbuf[15] = lowest_aligned;
2557 if (ata_id_has_trim(args->id) &&
2558 !(dev->horkage & ATA_HORKAGE_NOTRIM)) {
2559 rbuf[14] |= 0x80; /* LBPME */
2561 if (ata_id_has_zero_after_trim(args->id) &&
2562 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) {
2563 ata_dev_info(dev, "Enabling discard_zeroes_data\n");
2564 rbuf[14] |= 0x40; /* LBPRZ */
2567 if (ata_id_zoned_cap(args->id) ||
2568 args->dev->class == ATA_DEV_ZAC)
2569 rbuf[12] = (1 << 4); /* RC_BASIS */
2575 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2576 * @args: device IDENTIFY data / SCSI command of interest.
2577 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2579 * Simulate REPORT LUNS command.
2582 * spin_lock_irqsave(host lock)
2584 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2586 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2592 * ATAPI devices typically report zero for their SCSI version, and sometimes
2593 * deviate from the spec WRT response data format. If SCSI version is
2594 * reported as zero like normal, then we make the following fixups:
2595 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a
2597 * 2) Ensure response data format / ATAPI information are always correct.
2599 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd)
2603 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2608 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2611 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2613 struct scsi_cmnd *cmd = qc->scsicmd;
2614 unsigned int err_mask = qc->err_mask;
2616 /* handle completion from EH */
2617 if (unlikely(err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2619 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2620 /* FIXME: not quite right; we don't want the
2621 * translation of taskfile registers into a
2622 * sense descriptors, since that's only
2623 * correct for ATA, not ATAPI
2625 ata_gen_passthru_sense(qc);
2628 /* SCSI EH automatically locks door if sdev->locked is
2629 * set. Sometimes door lock request continues to
2630 * fail, for example, when no media is present. This
2631 * creates a loop - SCSI EH issues door lock which
2632 * fails and gets invoked again to acquire sense data
2633 * for the failed command.
2635 * If door lock fails, always clear sdev->locked to
2636 * avoid this infinite loop.
2638 * This may happen before SCSI scan is complete. Make
2639 * sure qc->dev->sdev isn't NULL before dereferencing.
2641 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2642 qc->dev->sdev->locked = 0;
2644 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2649 /* successful completion path */
2650 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0)
2651 atapi_fixup_inquiry(cmd);
2652 cmd->result = SAM_STAT_GOOD;
2657 * atapi_xlat - Initialize PACKET taskfile
2658 * @qc: command structure to be initialized
2661 * spin_lock_irqsave(host lock)
2664 * Zero on success, non-zero on failure.
2666 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2668 struct scsi_cmnd *scmd = qc->scsicmd;
2669 struct ata_device *dev = qc->dev;
2670 int nodata = (scmd->sc_data_direction == DMA_NONE);
2671 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2672 unsigned int nbytes;
2674 memset(qc->cdb, 0, dev->cdb_len);
2675 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2677 qc->complete_fn = atapi_qc_complete;
2679 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2680 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2681 qc->tf.flags |= ATA_TFLAG_WRITE;
2684 qc->tf.command = ATA_CMD_PACKET;
2685 ata_qc_set_pc_nbytes(qc);
2687 /* check whether ATAPI DMA is safe */
2688 if (!nodata && !using_pio && atapi_check_dma(qc))
2691 /* Some controller variants snoop this value for Packet
2692 * transfers to do state machine and FIFO management. Thus we
2693 * want to set it properly, and for DMA where it is
2694 * effectively meaningless.
2696 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2698 /* Most ATAPI devices which honor transfer chunk size don't
2699 * behave according to the spec when odd chunk size which
2700 * matches the transfer length is specified. If the number of
2701 * bytes to transfer is 2n+1. According to the spec, what
2702 * should happen is to indicate that 2n+1 is going to be
2703 * transferred and transfer 2n+2 bytes where the last byte is
2706 * In practice, this doesn't happen. ATAPI devices first
2707 * indicate and transfer 2n bytes and then indicate and
2708 * transfer 2 bytes where the last byte is padding.
2710 * This inconsistency confuses several controllers which
2711 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2712 * These controllers use actual number of transferred bytes to
2713 * update DMA pointer and transfer of 4n+2 bytes make those
2714 * controller push DMA pointer by 4n+4 bytes because SATA data
2715 * FISes are aligned to 4 bytes. This causes data corruption
2716 * and buffer overrun.
2718 * Always setting nbytes to even number solves this problem
2719 * because then ATAPI devices don't have to split data at 2n
2725 qc->tf.lbam = (nbytes & 0xFF);
2726 qc->tf.lbah = (nbytes >> 8);
2729 qc->tf.protocol = ATAPI_PROT_NODATA;
2731 qc->tf.protocol = ATAPI_PROT_PIO;
2734 qc->tf.protocol = ATAPI_PROT_DMA;
2735 qc->tf.feature |= ATAPI_PKT_DMA;
2737 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2738 (scmd->sc_data_direction != DMA_TO_DEVICE))
2739 /* some SATA bridges need us to indicate data xfer direction */
2740 qc->tf.feature |= ATAPI_DMADIR;
2744 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2745 as ATAPI tape drives don't get this right otherwise */
2749 static struct ata_device *ata_find_dev(struct ata_port *ap, unsigned int devno)
2752 * For the non-PMP case, ata_link_max_devices() returns 1 (SATA case),
2753 * or 2 (IDE master + slave case). However, the former case includes
2754 * libsas hosted devices which are numbered per scsi host, leading
2755 * to devno potentially being larger than 0 but with each struct
2756 * ata_device having its own struct ata_port and struct ata_link.
2757 * To accommodate these, ignore devno and always use device number 0.
2759 if (likely(!sata_pmp_attached(ap))) {
2760 int link_max_devices = ata_link_max_devices(&ap->link);
2762 if (link_max_devices == 1)
2763 return &ap->link.device[0];
2765 if (devno < link_max_devices)
2766 return &ap->link.device[devno];
2772 * For PMP-attached devices, the device number corresponds to C
2773 * (channel) of SCSI [H:C:I:L], indicating the port pmp link
2776 if (devno < ap->nr_pmp_links)
2777 return &ap->pmp_link[devno].device[0];
2782 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2783 const struct scsi_device *scsidev)
2787 /* skip commands not addressed to targets we simulate */
2788 if (!sata_pmp_attached(ap)) {
2789 if (unlikely(scsidev->channel || scsidev->lun))
2791 devno = scsidev->id;
2793 if (unlikely(scsidev->id || scsidev->lun))
2795 devno = scsidev->channel;
2798 return ata_find_dev(ap, devno);
2802 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2803 * @ap: ATA port to which the device is attached
2804 * @scsidev: SCSI device from which we derive the ATA device
2806 * Given various information provided in struct scsi_cmnd,
2807 * map that onto an ATA bus, and using that mapping
2808 * determine which ata_device is associated with the
2809 * SCSI command to be sent.
2812 * spin_lock_irqsave(host lock)
2815 * Associated ATA device, or %NULL if not found.
2818 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2820 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2822 if (unlikely(!dev || !ata_dev_enabled(dev)))
2829 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2830 * @byte1: Byte 1 from pass-thru CDB.
2833 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2836 ata_scsi_map_proto(u8 byte1)
2838 switch((byte1 & 0x1e) >> 1) {
2839 case 3: /* Non-data */
2840 return ATA_PROT_NODATA;
2843 case 10: /* UDMA Data-in */
2844 case 11: /* UDMA Data-Out */
2845 return ATA_PROT_DMA;
2847 case 4: /* PIO Data-in */
2848 case 5: /* PIO Data-out */
2849 return ATA_PROT_PIO;
2851 case 12: /* FPDMA */
2852 return ATA_PROT_NCQ;
2854 case 0: /* Hard Reset */
2856 case 8: /* Device Diagnostic */
2857 case 9: /* Device Reset */
2858 case 7: /* DMA Queued */
2859 case 15: /* Return Response Info */
2860 default: /* Reserved */
2864 return ATA_PROT_UNKNOWN;
2868 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2869 * @qc: command structure to be initialized
2871 * Handles either 12, 16, or 32-byte versions of the CDB.
2874 * Zero on success, non-zero on failure.
2876 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2878 struct ata_taskfile *tf = &(qc->tf);
2879 struct scsi_cmnd *scmd = qc->scsicmd;
2880 struct ata_device *dev = qc->dev;
2881 const u8 *cdb = scmd->cmnd;
2885 /* 7Fh variable length cmd means a ata pass-thru(32) */
2886 if (cdb[0] == VARIABLE_LENGTH_CMD)
2889 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]);
2890 if (tf->protocol == ATA_PROT_UNKNOWN) {
2895 if ((cdb[2 + cdb_offset] & 0x3) == 0) {
2897 * When T_LENGTH is zero (No data is transferred), dir should
2900 if (scmd->sc_data_direction != DMA_NONE) {
2901 fp = 2 + cdb_offset;
2905 if (ata_is_ncq(tf->protocol))
2906 tf->protocol = ATA_PROT_NCQ_NODATA;
2910 tf->flags |= ATA_TFLAG_LBA;
2913 * 12 and 16 byte CDBs use different offsets to
2914 * provide the various register values.
2919 * 16-byte CDB - may contain extended commands.
2921 * If that is the case, copy the upper byte register values.
2923 if (cdb[1] & 0x01) {
2924 tf->hob_feature = cdb[3];
2925 tf->hob_nsect = cdb[5];
2926 tf->hob_lbal = cdb[7];
2927 tf->hob_lbam = cdb[9];
2928 tf->hob_lbah = cdb[11];
2929 tf->flags |= ATA_TFLAG_LBA48;
2931 tf->flags &= ~ATA_TFLAG_LBA48;
2934 * Always copy low byte, device and command registers.
2936 tf->feature = cdb[4];
2941 tf->device = cdb[13];
2942 tf->command = cdb[14];
2946 * 12-byte CDB - incapable of extended commands.
2948 tf->flags &= ~ATA_TFLAG_LBA48;
2950 tf->feature = cdb[3];
2955 tf->device = cdb[8];
2956 tf->command = cdb[9];
2960 * 32-byte CDB - may contain extended command fields.
2962 * If that is the case, copy the upper byte register values.
2964 if (cdb[10] & 0x01) {
2965 tf->hob_feature = cdb[20];
2966 tf->hob_nsect = cdb[22];
2967 tf->hob_lbal = cdb[16];
2968 tf->hob_lbam = cdb[15];
2969 tf->hob_lbah = cdb[14];
2970 tf->flags |= ATA_TFLAG_LBA48;
2972 tf->flags &= ~ATA_TFLAG_LBA48;
2974 tf->feature = cdb[21];
2975 tf->nsect = cdb[23];
2979 tf->device = cdb[24];
2980 tf->command = cdb[25];
2981 tf->auxiliary = get_unaligned_be32(&cdb[28]);
2985 /* For NCQ commands copy the tag value */
2986 if (ata_is_ncq(tf->protocol))
2987 tf->nsect = qc->hw_tag << 3;
2989 /* enforce correct master/slave bit */
2990 tf->device = dev->devno ?
2991 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2993 switch (tf->command) {
2994 /* READ/WRITE LONG use a non-standard sect_size */
2995 case ATA_CMD_READ_LONG:
2996 case ATA_CMD_READ_LONG_ONCE:
2997 case ATA_CMD_WRITE_LONG:
2998 case ATA_CMD_WRITE_LONG_ONCE:
2999 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) {
3003 qc->sect_size = scsi_bufflen(scmd);
3006 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3007 case ATA_CMD_CFA_WRITE_NE:
3008 case ATA_CMD_CFA_TRANS_SECT:
3009 case ATA_CMD_CFA_WRITE_MULT_NE:
3010 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3012 case ATA_CMD_READ_EXT:
3013 case ATA_CMD_READ_QUEUED:
3014 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3015 case ATA_CMD_FPDMA_READ:
3016 case ATA_CMD_READ_MULTI:
3017 case ATA_CMD_READ_MULTI_EXT:
3018 case ATA_CMD_PIO_READ:
3019 case ATA_CMD_PIO_READ_EXT:
3020 case ATA_CMD_READ_STREAM_DMA_EXT:
3021 case ATA_CMD_READ_STREAM_EXT:
3022 case ATA_CMD_VERIFY:
3023 case ATA_CMD_VERIFY_EXT:
3025 case ATA_CMD_WRITE_EXT:
3026 case ATA_CMD_WRITE_FUA_EXT:
3027 case ATA_CMD_WRITE_QUEUED:
3028 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
3029 case ATA_CMD_FPDMA_WRITE:
3030 case ATA_CMD_WRITE_MULTI:
3031 case ATA_CMD_WRITE_MULTI_EXT:
3032 case ATA_CMD_WRITE_MULTI_FUA_EXT:
3033 case ATA_CMD_PIO_WRITE:
3034 case ATA_CMD_PIO_WRITE_EXT:
3035 case ATA_CMD_WRITE_STREAM_DMA_EXT:
3036 case ATA_CMD_WRITE_STREAM_EXT:
3037 qc->sect_size = scmd->device->sector_size;
3040 /* Everything else uses 512 byte "sectors" */
3042 qc->sect_size = ATA_SECT_SIZE;
3046 * Set flags so that all registers will be written, pass on
3047 * write indication (used for PIO/DMA setup), result TF is
3048 * copied back and we don't whine too much about its failure.
3050 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3051 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3052 tf->flags |= ATA_TFLAG_WRITE;
3054 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3057 * Set transfer length.
3059 * TODO: find out if we need to do more here to
3060 * cover scatter/gather case.
3062 ata_qc_set_pc_nbytes(qc);
3064 /* We may not issue DMA commands if no DMA mode is set */
3065 if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) {
3070 /* We may not issue NCQ commands to devices not supporting NCQ */
3071 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) {
3076 /* sanity check for pio multi commands */
3077 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) {
3082 if (is_multi_taskfile(tf)) {
3083 unsigned int multi_count = 1 << (cdb[1] >> 5);
3085 /* compare the passed through multi_count
3086 * with the cached multi_count of libata
3088 if (multi_count != dev->multi_count)
3089 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3094 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3095 * SET_FEATURES - XFER MODE must be preceded/succeeded
3096 * by an update to hardware-specific registers for each
3097 * controller (i.e. the reason for ->set_piomode(),
3098 * ->set_dmamode(), and ->post_set_mode() hooks).
3100 if (tf->command == ATA_CMD_SET_FEATURES &&
3101 tf->feature == SETFEATURES_XFER) {
3102 fp = (cdb[0] == ATA_16) ? 4 : 3;
3107 * Filter TPM commands by default. These provide an
3108 * essentially uncontrolled encrypted "back door" between
3109 * applications and the disk. Set libata.allow_tpm=1 if you
3110 * have a real reason for wanting to use them. This ensures
3111 * that installed software cannot easily mess stuff up without
3112 * user intent. DVR type users will probably ship with this enabled
3113 * for movie content management.
3115 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3116 * for this and should do in future but that it is not sufficient as
3117 * DCS is an optional feature set. Thus we also do the software filter
3118 * so that we comply with the TC consortium stated goal that the user
3119 * can turn off TC features of their system.
3121 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) {
3122 fp = (cdb[0] == ATA_16) ? 14 : 9;
3129 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff);
3134 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim
3135 * @cmd: SCSI command being translated
3136 * @trmax: Maximum number of entries that will fit in sector_size bytes.
3137 * @sector: Starting sector
3138 * @count: Total Range of request in logical sectors
3140 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted
3143 * Upto 64 entries of the format:
3144 * 63:48 Range Length
3147 * Range Length of 0 is ignored.
3148 * LBA's should be sorted order and not overlap.
3150 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET
3152 * Return: Number of bytes copied into sglist.
3154 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax,
3155 u64 sector, u32 count)
3157 struct scsi_device *sdp = cmd->device;
3158 size_t len = sdp->sector_size;
3162 unsigned long flags;
3164 WARN_ON(len > ATA_SCSI_RBUF_SIZE);
3166 if (len > ATA_SCSI_RBUF_SIZE)
3167 len = ATA_SCSI_RBUF_SIZE;
3169 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
3170 buf = ((void *)ata_scsi_rbuf);
3171 memset(buf, 0, len);
3173 u64 entry = sector |
3174 ((u64)(count > 0xffff ? 0xffff : count) << 48);
3175 buf[i++] = __cpu_to_le64(entry);
3176 if (count <= 0xffff)
3181 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len);
3182 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
3188 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same
3189 * @qc: Command to be translated
3191 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or
3192 * an SCT Write Same command.
3193 * Based on WRITE SAME has the UNMAP flag:
3195 * - When set translate to DSM TRIM
3196 * - When clear translate to SCT Write Same
3198 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3200 struct ata_taskfile *tf = &qc->tf;
3201 struct scsi_cmnd *scmd = qc->scsicmd;
3202 struct scsi_device *sdp = scmd->device;
3203 size_t len = sdp->sector_size;
3204 struct ata_device *dev = qc->dev;
3205 const u8 *cdb = scmd->cmnd;
3208 const u32 trmax = len >> 3;
3212 u8 unmap = cdb[1] & 0x8;
3214 /* we may not issue DMA commands if no DMA mode is set */
3215 if (unlikely(!ata_dma_enabled(dev)))
3216 goto invalid_opcode;
3219 * We only allow sending this command through the block layer,
3220 * as it modifies the DATA OUT buffer, which would corrupt user
3221 * memory for SG_IO commands.
3223 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd))))
3224 goto invalid_opcode;
3226 if (unlikely(scmd->cmd_len < 16)) {
3230 scsi_16_lba_len(cdb, &block, &n_block);
3233 (dev->horkage & ATA_HORKAGE_NOTRIM) ||
3234 !ata_id_has_trim(dev->id)) {
3239 /* If the request is too large the cmd is invalid */
3240 if (n_block > 0xffff * trmax) {
3246 * WRITE SAME always has a sector sized buffer as payload, this
3247 * should never be a multiple entry S/G list.
3249 if (!scsi_sg_count(scmd))
3250 goto invalid_param_len;
3253 * size must match sector size in bytes
3254 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count)
3255 * is defined as number of 512 byte blocks to be transferred.
3258 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block);
3260 goto invalid_param_len;
3262 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3263 /* Newer devices support queued TRIM commands */
3264 tf->protocol = ATA_PROT_NCQ;
3265 tf->command = ATA_CMD_FPDMA_SEND;
3266 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3267 tf->nsect = qc->hw_tag << 3;
3268 tf->hob_feature = (size / 512) >> 8;
3269 tf->feature = size / 512;
3273 tf->protocol = ATA_PROT_DMA;
3274 tf->hob_feature = 0;
3275 tf->feature = ATA_DSM_TRIM;
3276 tf->hob_nsect = (size / 512) >> 8;
3277 tf->nsect = size / 512;
3278 tf->command = ATA_CMD_DSM;
3281 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3284 ata_qc_set_pc_nbytes(qc);
3289 ata_scsi_set_invalid_field(dev, scmd, fp, bp);
3292 /* "Parameter list length error" */
3293 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3296 /* "Invalid command operation code" */
3297 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0);
3302 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN
3303 * @args: device MAINTENANCE_IN data / SCSI command of interest.
3304 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
3306 * Yields a subset to satisfy scsi_report_opcode()
3309 * spin_lock_irqsave(host lock)
3311 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf)
3313 struct ata_device *dev = args->dev;
3314 u8 *cdb = args->cmd->cmnd;
3315 u8 supported = 0, cdlp = 0, rwcdlp = 0;
3316 unsigned int err = 0;
3318 if (cdb[2] != 1 && cdb[2] != 3) {
3319 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]);
3329 case SERVICE_ACTION_IN_16:
3332 case SYNCHRONIZE_CACHE:
3333 case SYNCHRONIZE_CACHE_16:
3337 case TEST_UNIT_READY:
3338 case SEND_DIAGNOSTIC:
3339 case MAINTENANCE_IN:
3349 case MODE_SELECT_10:
3355 if (dev->flags & ATA_DFLAG_CDL) {
3357 * CDL read descriptors map to the T2A page, that is,
3358 * rwcdlp = 0x01 and cdlp = 0x01
3366 if (dev->flags & ATA_DFLAG_CDL) {
3368 * CDL write descriptors map to the T2B page, that is,
3369 * rwcdlp = 0x01 and cdlp = 0x02
3377 if (ata_id_zoned_cap(dev->id) ||
3378 dev->class == ATA_DEV_ZAC)
3381 case SECURITY_PROTOCOL_IN:
3382 case SECURITY_PROTOCOL_OUT:
3383 if (dev->flags & ATA_DFLAG_TRUSTED)
3390 /* One command format */
3392 rbuf[1] = cdlp | supported;
3397 * ata_scsi_report_zones_complete - convert ATA output
3398 * @qc: command structure returning the data
3400 * Convert T-13 little-endian field representation into
3401 * T-10 big-endian field representation.
3404 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc)
3406 struct scsi_cmnd *scmd = qc->scsicmd;
3407 struct sg_mapping_iter miter;
3408 unsigned long flags;
3409 unsigned int bytes = 0;
3411 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd),
3412 SG_MITER_TO_SG | SG_MITER_ATOMIC);
3414 local_irq_save(flags);
3415 while (sg_miter_next(&miter)) {
3416 unsigned int offset = 0;
3421 u64 max_lba, opt_lba;
3424 /* Swizzle header */
3426 list_length = get_unaligned_le32(&hdr[0]);
3427 same = get_unaligned_le16(&hdr[4]);
3428 max_lba = get_unaligned_le64(&hdr[8]);
3429 opt_lba = get_unaligned_le64(&hdr[16]);
3430 put_unaligned_be32(list_length, &hdr[0]);
3431 hdr[4] = same & 0xf;
3432 put_unaligned_be64(max_lba, &hdr[8]);
3433 put_unaligned_be64(opt_lba, &hdr[16]);
3437 while (offset < miter.length) {
3439 u8 cond, type, non_seq, reset;
3440 u64 size, start, wp;
3442 /* Swizzle zone descriptor */
3443 rec = miter.addr + offset;
3444 type = rec[0] & 0xf;
3445 cond = (rec[1] >> 4) & 0xf;
3446 non_seq = (rec[1] & 2);
3447 reset = (rec[1] & 1);
3448 size = get_unaligned_le64(&rec[8]);
3449 start = get_unaligned_le64(&rec[16]);
3450 wp = get_unaligned_le64(&rec[24]);
3452 rec[1] = (cond << 4) | non_seq | reset;
3453 put_unaligned_be64(size, &rec[8]);
3454 put_unaligned_be64(start, &rec[16]);
3455 put_unaligned_be64(wp, &rec[24]);
3456 WARN_ON(offset + 64 > miter.length);
3461 sg_miter_stop(&miter);
3462 local_irq_restore(flags);
3464 ata_scsi_qc_complete(qc);
3467 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc)
3469 struct ata_taskfile *tf = &qc->tf;
3470 struct scsi_cmnd *scmd = qc->scsicmd;
3471 const u8 *cdb = scmd->cmnd;
3472 u16 sect, fp = (u16)-1;
3473 u8 sa, options, bp = 0xff;
3477 if (unlikely(scmd->cmd_len < 16)) {
3478 ata_dev_warn(qc->dev, "invalid cdb length %d\n",
3483 scsi_16_lba_len(cdb, &block, &n_block);
3484 if (n_block != scsi_bufflen(scmd)) {
3485 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n",
3486 n_block, scsi_bufflen(scmd));
3487 goto invalid_param_len;
3490 if (sa != ZI_REPORT_ZONES) {
3491 ata_dev_warn(qc->dev, "invalid service action %d\n", sa);
3496 * ZAC allows only for transfers in 512 byte blocks,
3497 * and uses a 16 bit value for the transfer count.
3499 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) {
3500 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block);
3501 goto invalid_param_len;
3503 sect = n_block / 512;
3504 options = cdb[14] & 0xbf;
3506 if (ata_ncq_enabled(qc->dev) &&
3507 ata_fpdma_zac_mgmt_in_supported(qc->dev)) {
3508 tf->protocol = ATA_PROT_NCQ;
3509 tf->command = ATA_CMD_FPDMA_RECV;
3510 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f;
3511 tf->nsect = qc->hw_tag << 3;
3512 tf->feature = sect & 0xff;
3513 tf->hob_feature = (sect >> 8) & 0xff;
3514 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8);
3516 tf->command = ATA_CMD_ZAC_MGMT_IN;
3517 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES;
3518 tf->protocol = ATA_PROT_DMA;
3519 tf->hob_feature = options;
3520 tf->hob_nsect = (sect >> 8) & 0xff;
3521 tf->nsect = sect & 0xff;
3523 tf->device = ATA_LBA;
3524 tf->lbah = (block >> 16) & 0xff;
3525 tf->lbam = (block >> 8) & 0xff;
3526 tf->lbal = block & 0xff;
3527 tf->hob_lbah = (block >> 40) & 0xff;
3528 tf->hob_lbam = (block >> 32) & 0xff;
3529 tf->hob_lbal = (block >> 24) & 0xff;
3531 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3532 qc->flags |= ATA_QCFLAG_RESULT_TF;
3534 ata_qc_set_pc_nbytes(qc);
3536 qc->complete_fn = ata_scsi_report_zones_complete;
3541 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
3545 /* "Parameter list length error" */
3546 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3550 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc)
3552 struct ata_taskfile *tf = &qc->tf;
3553 struct scsi_cmnd *scmd = qc->scsicmd;
3554 struct ata_device *dev = qc->dev;
3555 const u8 *cdb = scmd->cmnd;
3561 if (unlikely(scmd->cmd_len < 16)) {
3567 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) &&
3568 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) {
3573 scsi_16_lba_len(cdb, &block, &n_block);
3576 * ZAC MANAGEMENT OUT doesn't define any length
3578 goto invalid_param_len;
3581 all = cdb[14] & 0x1;
3584 * Ignore the block address (zone ID) as defined by ZBC.
3587 } else if (block >= dev->n_sectors) {
3589 * Block must be a valid zone ID (a zone start LBA).
3595 if (ata_ncq_enabled(qc->dev) &&
3596 ata_fpdma_zac_mgmt_out_supported(qc->dev)) {
3597 tf->protocol = ATA_PROT_NCQ_NODATA;
3598 tf->command = ATA_CMD_NCQ_NON_DATA;
3599 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT;
3600 tf->nsect = qc->hw_tag << 3;
3601 tf->auxiliary = sa | ((u16)all << 8);
3603 tf->protocol = ATA_PROT_NODATA;
3604 tf->command = ATA_CMD_ZAC_MGMT_OUT;
3606 tf->hob_feature = all;
3608 tf->lbah = (block >> 16) & 0xff;
3609 tf->lbam = (block >> 8) & 0xff;
3610 tf->lbal = block & 0xff;
3611 tf->hob_lbah = (block >> 40) & 0xff;
3612 tf->hob_lbam = (block >> 32) & 0xff;
3613 tf->hob_lbal = (block >> 24) & 0xff;
3614 tf->device = ATA_LBA;
3615 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3620 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
3623 /* "Parameter list length error" */
3624 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3629 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3630 * @qc: Storage for translated ATA taskfile
3631 * @buf: input buffer
3632 * @len: number of valid bytes in the input buffer
3633 * @fp: out parameter for the failed field on error
3635 * Prepare a taskfile to modify caching information for the device.
3640 static int ata_mselect_caching(struct ata_queued_cmd *qc,
3641 const u8 *buf, int len, u16 *fp)
3643 struct ata_taskfile *tf = &qc->tf;
3644 struct ata_device *dev = qc->dev;
3645 u8 mpage[CACHE_MPAGE_LEN];
3650 * The first two bytes of def_cache_mpage are a header, so offsets
3651 * in mpage are off by 2 compared to buf. Same for len.
3654 if (len != CACHE_MPAGE_LEN - 2) {
3655 *fp = min(len, CACHE_MPAGE_LEN - 2);
3659 wce = buf[0] & (1 << 2);
3662 * Check that read-only bits are not modified.
3664 ata_msense_caching(dev->id, mpage, false);
3665 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) {
3668 if (mpage[i + 2] != buf[i]) {
3674 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3675 tf->protocol = ATA_PROT_NODATA;
3677 tf->command = ATA_CMD_SET_FEATURES;
3678 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3683 * Simulate MODE SELECT control mode page, sub-page 0.
3685 static int ata_mselect_control_spg0(struct ata_queued_cmd *qc,
3686 const u8 *buf, int len, u16 *fp)
3688 struct ata_device *dev = qc->dev;
3689 u8 mpage[CONTROL_MPAGE_LEN];
3694 * The first two bytes of def_control_mpage are a header, so offsets
3695 * in mpage are off by 2 compared to buf. Same for len.
3698 if (len != CONTROL_MPAGE_LEN - 2) {
3699 *fp = min(len, CONTROL_MPAGE_LEN - 2);
3703 d_sense = buf[0] & (1 << 2);
3706 * Check that read-only bits are not modified.
3708 ata_msense_control_spg0(dev, mpage, false);
3709 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) {
3712 if (mpage[2 + i] != buf[i]) {
3717 if (d_sense & (1 << 2))
3718 dev->flags |= ATA_DFLAG_D_SENSE;
3720 dev->flags &= ~ATA_DFLAG_D_SENSE;
3725 * Translate MODE SELECT control mode page, sub-pages f2h (ATA feature mode
3726 * page) into a SET FEATURES command.
3728 static unsigned int ata_mselect_control_ata_feature(struct ata_queued_cmd *qc,
3729 const u8 *buf, int len,
3732 struct ata_device *dev = qc->dev;
3733 struct ata_taskfile *tf = &qc->tf;
3737 * The first four bytes of ATA Feature Control mode page are a header,
3738 * so offsets in mpage are off by 4 compared to buf. Same for len.
3740 if (len != ATA_FEATURE_SUB_MPAGE_LEN - 4) {
3741 *fp = min(len, ATA_FEATURE_SUB_MPAGE_LEN - 4);
3745 /* Check cdl_ctrl */
3746 switch (buf[0] & 0x03) {
3750 dev->flags &= ~ATA_DFLAG_CDL_ENABLED;
3753 /* Enable CDL T2A/T2B: NCQ priority must be disabled */
3754 if (dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLED) {
3756 "NCQ priority must be disabled to enable CDL\n");
3760 dev->flags |= ATA_DFLAG_CDL_ENABLED;
3767 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3768 tf->protocol = ATA_PROT_NODATA;
3769 tf->command = ATA_CMD_SET_FEATURES;
3770 tf->feature = SETFEATURES_CDL;
3771 tf->nsect = cdl_action;
3777 * ata_mselect_control - Simulate MODE SELECT for control page
3778 * @qc: Storage for translated ATA taskfile
3779 * @spg: target sub-page of the control page
3780 * @buf: input buffer
3781 * @len: number of valid bytes in the input buffer
3782 * @fp: out parameter for the failed field on error
3784 * Prepare a taskfile to modify caching information for the device.
3789 static int ata_mselect_control(struct ata_queued_cmd *qc, u8 spg,
3790 const u8 *buf, int len, u16 *fp)
3794 return ata_mselect_control_spg0(qc, buf, len, fp);
3795 case ATA_FEATURE_SUB_MPAGE:
3796 return ata_mselect_control_ata_feature(qc, buf, len, fp);
3803 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands
3804 * @qc: Storage for translated ATA taskfile
3806 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3807 * Assume this is invoked for direct access devices (e.g. disks) only.
3808 * There should be no block descriptor for other device types.
3811 * spin_lock_irqsave(host lock)
3813 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3815 struct scsi_cmnd *scmd = qc->scsicmd;
3816 const u8 *cdb = scmd->cmnd;
3818 unsigned six_byte, pg_len, hdr_len, bd_len;
3823 const u8 *p = buffer;
3825 six_byte = (cdb[0] == MODE_SELECT);
3827 if (scmd->cmd_len < 5) {
3835 if (scmd->cmd_len < 9) {
3840 len = get_unaligned_be16(&cdb[7]);
3844 /* We only support PF=1, SP=0. */
3845 if ((cdb[1] & 0x11) != 0x10) {
3847 bp = (cdb[1] & 0x01) ? 1 : 5;
3851 /* Test early for possible overrun. */
3852 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
3853 goto invalid_param_len;
3855 /* Move past header and block descriptors. */
3857 goto invalid_param_len;
3859 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd),
3860 buffer, sizeof(buffer)))
3861 goto invalid_param_len;
3866 bd_len = get_unaligned_be16(&p[6]);
3871 goto invalid_param_len;
3872 if (bd_len != 0 && bd_len != 8) {
3873 fp = (six_byte) ? 3 : 6;
3874 fp += bd_len + hdr_len;
3883 /* Parse both possible formats for the mode page headers. */
3887 goto invalid_param_len;
3890 pg_len = get_unaligned_be16(&p[2]);
3895 goto invalid_param_len;
3904 * Supported subpages: all subpages and ATA feature sub-page f2h of
3909 case ALL_SUB_MPAGES:
3910 /* All subpages is not supported for the control page */
3911 if (pg == CONTROL_MPAGE) {
3912 fp = (p[0] & 0x40) ? 1 : 0;
3913 fp += hdr_len + bd_len;
3917 case ATA_FEATURE_SUB_MPAGE:
3918 if (qc->dev->flags & ATA_DFLAG_CDL &&
3919 pg == CONTROL_MPAGE)
3923 fp = (p[0] & 0x40) ? 1 : 0;
3924 fp += hdr_len + bd_len;
3929 goto invalid_param_len;
3933 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) {
3934 fp += hdr_len + bd_len;
3939 ret = ata_mselect_control(qc, spg, p, pg_len, &fp);
3941 fp += hdr_len + bd_len;
3945 goto skip; /* No ATA command to send */
3948 /* Invalid page code */
3949 fp = bd_len + hdr_len;
3954 * Only one page has changeable data, so we only support setting one
3963 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
3967 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp);
3971 /* "Parameter list length error" */
3972 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3976 scmd->result = SAM_STAT_GOOD;
3980 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma)
3983 return ATA_CMD_TRUSTED_NONDATA;
3985 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND;
3987 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV;
3990 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc)
3992 struct scsi_cmnd *scmd = qc->scsicmd;
3993 const u8 *cdb = scmd->cmnd;
3994 struct ata_taskfile *tf = &qc->tf;
3996 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT);
3997 u16 spsp = get_unaligned_be16(&cdb[2]);
3998 u32 len = get_unaligned_be32(&cdb[6]);
3999 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO);
4002 * We don't support the ATA "security" protocol.
4005 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0);
4009 if (cdb[4] & 7) { /* INC_512 */
4011 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0);
4015 if (len > 0x01fffe00) {
4016 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0);
4020 /* convert to the sector-based ATA addressing */
4021 len = (len + 511) / 512;
4024 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO;
4025 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA;
4027 tf->flags |= ATA_TFLAG_WRITE;
4028 tf->command = ata_scsi_trusted_op(len, send, dma);
4030 tf->lbam = spsp & 0xff;
4031 tf->lbah = spsp >> 8;
4034 tf->nsect = len & 0xff;
4035 tf->lbal = len >> 8;
4038 tf->lbah = (1 << 7);
4041 ata_qc_set_pc_nbytes(qc);
4046 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler
4047 * @qc: Command to be translated
4049 * Translate a SCSI variable length CDB to specified commands.
4050 * It checks a service action value in CDB to call corresponding handler.
4053 * Zero on success, non-zero on failure
4056 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc)
4058 struct scsi_cmnd *scmd = qc->scsicmd;
4059 const u8 *cdb = scmd->cmnd;
4060 const u16 sa = get_unaligned_be16(&cdb[8]);
4063 * if service action represents a ata pass-thru(32) command,
4064 * then pass it to ata_scsi_pass_thru handler.
4067 return ata_scsi_pass_thru(qc);
4069 /* unsupported service action */
4074 * ata_get_xlat_func - check if SCSI to ATA translation is possible
4076 * @cmd: SCSI command opcode to consider
4078 * Look up the SCSI command given, and determine whether the
4079 * SCSI command is to be translated or simulated.
4082 * Pointer to translation function if possible, %NULL if not.
4085 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
4095 return ata_scsi_rw_xlat;
4098 return ata_scsi_write_same_xlat;
4100 case SYNCHRONIZE_CACHE:
4101 case SYNCHRONIZE_CACHE_16:
4102 if (ata_try_flush_cache(dev))
4103 return ata_scsi_flush_xlat;
4108 return ata_scsi_verify_xlat;
4112 return ata_scsi_pass_thru;
4114 case VARIABLE_LENGTH_CMD:
4115 return ata_scsi_var_len_cdb_xlat;
4118 case MODE_SELECT_10:
4119 return ata_scsi_mode_select_xlat;
4122 return ata_scsi_zbc_in_xlat;
4125 return ata_scsi_zbc_out_xlat;
4127 case SECURITY_PROTOCOL_IN:
4128 case SECURITY_PROTOCOL_OUT:
4129 if (!(dev->flags & ATA_DFLAG_TRUSTED))
4131 return ata_scsi_security_inout_xlat;
4134 return ata_scsi_start_stop_xlat;
4140 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev)
4142 struct ata_port *ap = dev->link->ap;
4143 u8 scsi_op = scmd->cmnd[0];
4144 ata_xlat_func_t xlat_func;
4147 * scsi_queue_rq() will defer commands if scsi_host_in_recovery().
4148 * However, this check is done without holding the ap->lock (a libata
4149 * specific lock), so we can have received an error irq since then,
4150 * therefore we must check if EH is pending, while holding ap->lock.
4152 if (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS))
4153 return SCSI_MLQUEUE_DEVICE_BUSY;
4155 if (unlikely(!scmd->cmd_len))
4158 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
4159 if (unlikely(scmd->cmd_len > dev->cdb_len))
4162 xlat_func = ata_get_xlat_func(dev, scsi_op);
4163 } else if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
4164 /* relay SCSI command to ATAPI device */
4165 int len = COMMAND_SIZE(scsi_op);
4167 if (unlikely(len > scmd->cmd_len ||
4168 len > dev->cdb_len ||
4169 scmd->cmd_len > ATAPI_CDB_LEN))
4172 xlat_func = atapi_xlat;
4174 /* ATA_16 passthru, treat as an ATA command */
4175 if (unlikely(scmd->cmd_len > 16))
4178 xlat_func = ata_get_xlat_func(dev, scsi_op);
4182 return ata_scsi_translate(dev, scmd, xlat_func);
4184 ata_scsi_simulate(dev, scmd);
4189 scmd->result = DID_ERROR << 16;
4195 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
4196 * @shost: SCSI host of command to be sent
4197 * @cmd: SCSI command to be sent
4199 * In some cases, this function translates SCSI commands into
4200 * ATA taskfiles, and queues the taskfiles to be sent to
4201 * hardware. In other cases, this function simulates a
4202 * SCSI device by evaluating and responding to certain
4203 * SCSI commands. This creates the overall effect of
4204 * ATA and ATAPI devices appearing as SCSI devices.
4210 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4213 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
4215 struct ata_port *ap;
4216 struct ata_device *dev;
4217 struct scsi_device *scsidev = cmd->device;
4219 unsigned long irq_flags;
4221 ap = ata_shost_to_port(shost);
4223 spin_lock_irqsave(ap->lock, irq_flags);
4225 dev = ata_scsi_find_dev(ap, scsidev);
4227 rc = __ata_scsi_queuecmd(cmd, dev);
4229 cmd->result = (DID_BAD_TARGET << 16);
4233 spin_unlock_irqrestore(ap->lock, irq_flags);
4237 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
4240 * ata_scsi_simulate - simulate SCSI command on ATA device
4241 * @dev: the target device
4242 * @cmd: SCSI command being sent to device.
4244 * Interprets and directly executes a select list of SCSI commands
4245 * that can be handled internally.
4248 * spin_lock_irqsave(host lock)
4251 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
4253 struct ata_scsi_args args;
4254 const u8 *scsicmd = cmd->cmnd;
4261 switch(scsicmd[0]) {
4263 if (scsicmd[1] & 2) /* is CmdDt set? */
4264 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4265 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
4266 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
4267 else switch (scsicmd[2]) {
4269 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
4272 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
4275 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
4278 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
4281 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
4284 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
4287 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
4290 if (dev->flags & ATA_DFLAG_ZAC)
4291 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6);
4293 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
4297 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b9);
4299 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
4302 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
4309 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
4313 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4316 case SERVICE_ACTION_IN_16:
4317 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
4318 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4320 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4324 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
4328 ata_scsi_set_sense(dev, cmd, 0, 0, 0);
4331 /* if we reach this, then writeback caching is disabled,
4332 * turning this into a no-op.
4334 case SYNCHRONIZE_CACHE:
4335 case SYNCHRONIZE_CACHE_16:
4338 /* no-op's, complete with success */
4342 case TEST_UNIT_READY:
4345 case SEND_DIAGNOSTIC:
4346 tmp8 = scsicmd[1] & ~(1 << 3);
4347 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4])
4348 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4351 case MAINTENANCE_IN:
4352 if ((scsicmd[1] & 0x1f) == MI_REPORT_SUPPORTED_OPERATION_CODES)
4353 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in);
4355 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4358 /* all other commands */
4360 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0);
4361 /* "Invalid command operation code" */
4368 int ata_scsi_add_hosts(struct ata_host *host, const struct scsi_host_template *sht)
4372 for (i = 0; i < host->n_ports; i++) {
4373 struct ata_port *ap = host->ports[i];
4374 struct Scsi_Host *shost;
4377 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
4381 shost->eh_noresume = 1;
4382 *(struct ata_port **)&shost->hostdata[0] = ap;
4383 ap->scsi_host = shost;
4385 shost->transportt = ata_scsi_transport_template;
4386 shost->unique_id = ap->print_id;
4389 shost->max_channel = 1;
4390 shost->max_cmd_len = 32;
4392 /* Schedule policy is determined by ->qc_defer()
4393 * callback and it needs to see every deferred qc.
4394 * Set host_blocked to 1 to prevent SCSI midlayer from
4395 * automatically deferring requests.
4397 shost->max_host_blocked = 1;
4399 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev);
4408 struct Scsi_Host *shost = host->ports[i]->scsi_host;
4410 /* scsi_host_put() is in ata_devres_release() */
4411 scsi_remove_host(shost);
4417 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap)
4419 struct scsi_device *sdev = dev->sdev;
4420 struct device *d = ap->host->dev;
4421 struct device_node *np = d->of_node;
4422 struct device_node *child;
4424 for_each_available_child_of_node(np, child) {
4428 ret = of_property_read_u32(child, "reg", &val);
4431 if (val == dev->devno) {
4432 dev_dbg(d, "found matching device node\n");
4433 sdev->sdev_gendev.of_node = child;
4439 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap)
4444 void ata_scsi_scan_host(struct ata_port *ap, int sync)
4447 struct ata_device *last_failed_dev = NULL;
4448 struct ata_link *link;
4449 struct ata_device *dev;
4452 ata_for_each_link(link, ap, EDGE) {
4453 ata_for_each_dev(dev, link, ENABLED) {
4454 struct scsi_device *sdev;
4455 int channel = 0, id = 0;
4460 if (ata_is_host_link(link))
4463 channel = link->pmp;
4465 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
4467 if (!IS_ERR(sdev)) {
4469 ata_scsi_assign_ofnode(dev, ap);
4470 scsi_device_put(sdev);
4477 /* If we scanned while EH was in progress or allocation
4478 * failure occurred, scan would have failed silently. Check
4479 * whether all devices are attached.
4481 ata_for_each_link(link, ap, EDGE) {
4482 ata_for_each_dev(dev, link, ENABLED) {
4491 /* we're missing some SCSI devices */
4493 /* If caller requested synchrnous scan && we've made
4494 * any progress, sleep briefly and repeat.
4496 if (dev != last_failed_dev) {
4498 last_failed_dev = dev;
4502 /* We might be failing to detect boot device, give it
4503 * a few more chances.
4511 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
4514 queue_delayed_work(system_long_wq, &ap->hotplug_task,
4515 round_jiffies_relative(HZ));
4519 * ata_scsi_offline_dev - offline attached SCSI device
4520 * @dev: ATA device to offline attached SCSI device for
4522 * This function is called from ata_eh_hotplug() and responsible
4523 * for taking the SCSI device attached to @dev offline. This
4524 * function is called with host lock which protects dev->sdev
4528 * spin_lock_irqsave(host lock)
4531 * 1 if attached SCSI device exists, 0 otherwise.
4533 int ata_scsi_offline_dev(struct ata_device *dev)
4536 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
4543 * ata_scsi_remove_dev - remove attached SCSI device
4544 * @dev: ATA device to remove attached SCSI device for
4546 * This function is called from ata_eh_scsi_hotplug() and
4547 * responsible for removing the SCSI device attached to @dev.
4550 * Kernel thread context (may sleep).
4552 static void ata_scsi_remove_dev(struct ata_device *dev)
4554 struct ata_port *ap = dev->link->ap;
4555 struct scsi_device *sdev;
4556 unsigned long flags;
4558 /* Alas, we need to grab scan_mutex to ensure SCSI device
4559 * state doesn't change underneath us and thus
4560 * scsi_device_get() always succeeds. The mutex locking can
4561 * be removed if there is __scsi_device_get() interface which
4562 * increments reference counts regardless of device state.
4564 mutex_lock(&ap->scsi_host->scan_mutex);
4565 spin_lock_irqsave(ap->lock, flags);
4567 /* clearing dev->sdev is protected by host lock */
4572 /* If user initiated unplug races with us, sdev can go
4573 * away underneath us after the host lock and
4574 * scan_mutex are released. Hold onto it.
4576 if (scsi_device_get(sdev) == 0) {
4577 /* The following ensures the attached sdev is
4578 * offline on return from ata_scsi_offline_dev()
4579 * regardless it wins or loses the race
4580 * against this function.
4582 scsi_device_set_state(sdev, SDEV_OFFLINE);
4589 spin_unlock_irqrestore(ap->lock, flags);
4590 mutex_unlock(&ap->scsi_host->scan_mutex);
4593 ata_dev_info(dev, "detaching (SCSI %s)\n",
4594 dev_name(&sdev->sdev_gendev));
4596 scsi_remove_device(sdev);
4597 scsi_device_put(sdev);
4601 static void ata_scsi_handle_link_detach(struct ata_link *link)
4603 struct ata_port *ap = link->ap;
4604 struct ata_device *dev;
4606 ata_for_each_dev(dev, link, ALL) {
4607 unsigned long flags;
4609 if (!(dev->flags & ATA_DFLAG_DETACHED))
4612 spin_lock_irqsave(ap->lock, flags);
4613 dev->flags &= ~ATA_DFLAG_DETACHED;
4614 spin_unlock_irqrestore(ap->lock, flags);
4616 if (zpodd_dev_enabled(dev))
4619 ata_scsi_remove_dev(dev);
4624 * ata_scsi_media_change_notify - send media change event
4625 * @dev: Pointer to the disk device with media change event
4627 * Tell the block layer to send a media change notification
4631 * spin_lock_irqsave(host lock)
4633 void ata_scsi_media_change_notify(struct ata_device *dev)
4636 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
4641 * ata_scsi_hotplug - SCSI part of hotplug
4642 * @work: Pointer to ATA port to perform SCSI hotplug on
4644 * Perform SCSI part of hotplug. It's executed from a separate
4645 * workqueue after EH completes. This is necessary because SCSI
4646 * hot plugging requires working EH and hot unplugging is
4647 * synchronized with hot plugging with a mutex.
4650 * Kernel thread context (may sleep).
4652 void ata_scsi_hotplug(struct work_struct *work)
4654 struct ata_port *ap =
4655 container_of(work, struct ata_port, hotplug_task.work);
4658 if (ap->pflags & ATA_PFLAG_UNLOADING)
4661 mutex_lock(&ap->scsi_scan_mutex);
4663 /* Unplug detached devices. We cannot use link iterator here
4664 * because PMP links have to be scanned even if PMP is
4665 * currently not attached. Iterate manually.
4667 ata_scsi_handle_link_detach(&ap->link);
4669 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
4670 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
4672 /* scan for new ones */
4673 ata_scsi_scan_host(ap, 0);
4675 mutex_unlock(&ap->scsi_scan_mutex);
4679 * ata_scsi_user_scan - indication for user-initiated bus scan
4680 * @shost: SCSI host to scan
4681 * @channel: Channel to scan
4685 * This function is called when user explicitly requests bus
4686 * scan. Set probe pending flag and invoke EH.
4689 * SCSI layer (we don't care)
4694 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
4695 unsigned int id, u64 lun)
4697 struct ata_port *ap = ata_shost_to_port(shost);
4698 unsigned long flags;
4701 if (lun != SCAN_WILD_CARD && lun)
4704 if (!sata_pmp_attached(ap)) {
4705 if (channel != SCAN_WILD_CARD && channel)
4709 if (id != SCAN_WILD_CARD && id)
4714 spin_lock_irqsave(ap->lock, flags);
4716 if (devno == SCAN_WILD_CARD) {
4717 struct ata_link *link;
4719 ata_for_each_link(link, ap, EDGE) {
4720 struct ata_eh_info *ehi = &link->eh_info;
4721 ehi->probe_mask |= ATA_ALL_DEVICES;
4722 ehi->action |= ATA_EH_RESET;
4725 struct ata_device *dev = ata_find_dev(ap, devno);
4728 struct ata_eh_info *ehi = &dev->link->eh_info;
4729 ehi->probe_mask |= 1 << dev->devno;
4730 ehi->action |= ATA_EH_RESET;
4736 ata_port_schedule_eh(ap);
4737 spin_unlock_irqrestore(ap->lock, flags);
4738 ata_port_wait_eh(ap);
4740 spin_unlock_irqrestore(ap->lock, flags);
4746 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4747 * @work: Pointer to ATA port to perform scsi_rescan_device()
4749 * After ATA pass thru (SAT) commands are executed successfully,
4750 * libata need to propagate the changes to SCSI layer.
4753 * Kernel thread context (may sleep).
4755 void ata_scsi_dev_rescan(struct work_struct *work)
4757 struct ata_port *ap =
4758 container_of(work, struct ata_port, scsi_rescan_task.work);
4759 struct ata_link *link;
4760 struct ata_device *dev;
4761 unsigned long flags;
4764 mutex_lock(&ap->scsi_scan_mutex);
4765 spin_lock_irqsave(ap->lock, flags);
4767 ata_for_each_link(link, ap, EDGE) {
4768 ata_for_each_dev(dev, link, ENABLED) {
4769 struct scsi_device *sdev = dev->sdev;
4772 * If the port was suspended before this was scheduled,
4775 if (ap->pflags & ATA_PFLAG_SUSPENDED)
4780 if (scsi_device_get(sdev))
4783 spin_unlock_irqrestore(ap->lock, flags);
4784 ret = scsi_rescan_device(sdev);
4785 scsi_device_put(sdev);
4786 spin_lock_irqsave(ap->lock, flags);
4794 spin_unlock_irqrestore(ap->lock, flags);
4795 mutex_unlock(&ap->scsi_scan_mutex);
4797 /* Reschedule with a delay if scsi_rescan_device() returned an error */
4799 schedule_delayed_work(&ap->scsi_rescan_task,
4800 msecs_to_jiffies(5));