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 576
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
60 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
62 RW_RECOVERY_MPAGE_LEN - 2,
64 0, /* read retry count */
66 0, /* write retry count */
70 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
73 0, /* contains WCE, needs to be 0 for logic */
74 0, 0, 0, 0, 0, 0, 0, 0, 0,
75 0, /* contains DRA, needs to be 0 for logic */
79 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
81 CONTROL_MPAGE_LEN - 2,
82 2, /* DSENSE=0, GLTSD=1 */
83 0, /* [QAM+QERR may be 1, see 05-359r1] */
84 0, 0, 0, 0, 0xff, 0xff,
85 0, 30 /* extended self test time, see 05-359r1 */
88 static ssize_t ata_scsi_park_show(struct device *device,
89 struct device_attribute *attr, char *buf)
91 struct scsi_device *sdev = to_scsi_device(device);
93 struct ata_link *link;
94 struct ata_device *dev;
99 ap = ata_shost_to_port(sdev->host);
101 spin_lock_irq(ap->lock);
102 dev = ata_scsi_find_dev(ap, sdev);
107 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
114 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
115 link->eh_context.unloaded_mask & (1 << dev->devno) &&
116 time_after(dev->unpark_deadline, now))
117 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
122 spin_unlock_irq(ap->lock);
124 return rc ? rc : sysfs_emit(buf, "%u\n", msecs);
127 static ssize_t ata_scsi_park_store(struct device *device,
128 struct device_attribute *attr,
129 const char *buf, size_t len)
131 struct scsi_device *sdev = to_scsi_device(device);
133 struct ata_device *dev;
138 rc = kstrtol(buf, 10, &input);
143 if (input > ATA_TMOUT_MAX_PARK) {
145 input = ATA_TMOUT_MAX_PARK;
148 ap = ata_shost_to_port(sdev->host);
150 spin_lock_irqsave(ap->lock, flags);
151 dev = ata_scsi_find_dev(ap, sdev);
152 if (unlikely(!dev)) {
156 if (dev->class != ATA_DEV_ATA &&
157 dev->class != ATA_DEV_ZAC) {
163 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
168 dev->unpark_deadline = ata_deadline(jiffies, input);
169 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
170 ata_port_schedule_eh(ap);
171 complete(&ap->park_req_pending);
175 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
178 dev->flags |= ATA_DFLAG_NO_UNLOAD;
183 spin_unlock_irqrestore(ap->lock, flags);
185 return rc ? rc : len;
187 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
188 ata_scsi_park_show, ata_scsi_park_store);
189 EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
191 void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd,
192 u8 sk, u8 asc, u8 ascq)
194 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
199 scsi_build_sense(cmd, d_sense, sk, asc, ascq);
202 void ata_scsi_set_sense_information(struct ata_device *dev,
203 struct scsi_cmnd *cmd,
204 const struct ata_taskfile *tf)
211 information = ata_tf_read_block(tf, dev);
212 if (information == U64_MAX)
215 scsi_set_sense_information(cmd->sense_buffer,
216 SCSI_SENSE_BUFFERSIZE, information);
219 static void ata_scsi_set_invalid_field(struct ata_device *dev,
220 struct scsi_cmnd *cmd, u16 field, u8 bit)
222 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0);
223 /* "Invalid field in CDB" */
224 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
228 static void ata_scsi_set_invalid_parameter(struct ata_device *dev,
229 struct scsi_cmnd *cmd, u16 field)
231 /* "Invalid field in parameter list" */
232 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0);
233 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
237 static struct attribute *ata_common_sdev_attrs[] = {
238 &dev_attr_unload_heads.attr,
242 static const struct attribute_group ata_common_sdev_attr_group = {
243 .attrs = ata_common_sdev_attrs
246 const struct attribute_group *ata_common_sdev_groups[] = {
247 &ata_common_sdev_attr_group,
250 EXPORT_SYMBOL_GPL(ata_common_sdev_groups);
253 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
254 * @sdev: SCSI device for which BIOS geometry is to be determined
255 * @bdev: block device associated with @sdev
256 * @capacity: capacity of SCSI device
257 * @geom: location to which geometry will be output
259 * Generic bios head/sector/cylinder calculator
260 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
261 * mapping. Some situations may arise where the disk is not
262 * bootable if this is not used.
265 * Defined by the SCSI layer. We don't really care.
270 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
271 sector_t capacity, int geom[])
275 sector_div(capacity, 255*63);
280 EXPORT_SYMBOL_GPL(ata_std_bios_param);
283 * ata_scsi_unlock_native_capacity - unlock native capacity
284 * @sdev: SCSI device to adjust device capacity for
286 * This function is called if a partition on @sdev extends beyond
287 * the end of the device. It requests EH to unlock HPA.
290 * Defined by the SCSI layer. Might sleep.
292 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
294 struct ata_port *ap = ata_shost_to_port(sdev->host);
295 struct ata_device *dev;
298 spin_lock_irqsave(ap->lock, flags);
300 dev = ata_scsi_find_dev(ap, sdev);
301 if (dev && dev->n_sectors < dev->n_native_sectors) {
302 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
303 dev->link->eh_info.action |= ATA_EH_RESET;
304 ata_port_schedule_eh(ap);
307 spin_unlock_irqrestore(ap->lock, flags);
308 ata_port_wait_eh(ap);
310 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity);
313 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
315 * @sdev: SCSI device to get identify data for
316 * @arg: User buffer area for identify data
319 * Defined by the SCSI layer. We don't really care.
322 * Zero on success, negative errno on error.
324 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
327 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
328 u16 __user *dst = arg;
334 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
337 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
338 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
341 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
342 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
345 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
346 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
353 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
354 * @scsidev: Device to which we are issuing command
355 * @arg: User provided data for issuing command
358 * Defined by the SCSI layer. We don't really care.
361 * Zero on success, negative errno on error.
363 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
366 u8 sensebuf[SCSI_SENSE_BUFFERSIZE];
367 u8 scsi_cmd[MAX_COMMAND_SIZE];
368 u8 args[4], *argbuf = NULL;
370 enum dma_data_direction data_dir;
371 struct scsi_sense_hdr sshdr;
377 if (copy_from_user(args, arg, sizeof(args)))
380 memset(sensebuf, 0, sizeof(sensebuf));
381 memset(scsi_cmd, 0, sizeof(scsi_cmd));
384 argsize = ATA_SECT_SIZE * args[3];
385 argbuf = kmalloc(argsize, GFP_KERNEL);
386 if (argbuf == NULL) {
391 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
392 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
393 block count in sector count field */
394 data_dir = DMA_FROM_DEVICE;
396 scsi_cmd[1] = (3 << 1); /* Non-data */
397 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
401 scsi_cmd[0] = ATA_16;
403 scsi_cmd[4] = args[2];
404 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
405 scsi_cmd[6] = args[3];
406 scsi_cmd[8] = args[1];
407 scsi_cmd[10] = ATA_SMART_LBAM_PASS;
408 scsi_cmd[12] = ATA_SMART_LBAH_PASS;
410 scsi_cmd[6] = args[1];
412 scsi_cmd[14] = args[0];
414 /* Good values for timeout and retries? Values below
415 from scsi_ioctl_send_command() for default case... */
416 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
417 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL);
419 if (cmd_result < 0) {
423 if (scsi_sense_valid(&sshdr)) {/* sense data available */
424 u8 *desc = sensebuf + 8;
426 /* If we set cc then ATA pass-through will cause a
427 * check condition even if no error. Filter that. */
428 if (scsi_status_is_check_condition(cmd_result)) {
429 if (sshdr.sense_key == RECOVERED_ERROR &&
430 sshdr.asc == 0 && sshdr.ascq == 0x1d)
431 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
434 /* Send userspace a few ATA registers (same as drivers/ide) */
435 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
436 desc[0] == 0x09) { /* code is "ATA Descriptor" */
437 args[0] = desc[13]; /* status */
438 args[1] = desc[3]; /* error */
439 args[2] = desc[5]; /* sector count (0:7) */
440 if (copy_to_user(arg, args, sizeof(args)))
452 && copy_to_user(arg + sizeof(args), argbuf, argsize))
460 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
461 * @scsidev: Device to which we are issuing command
462 * @arg: User provided data for issuing command
465 * Defined by the SCSI layer. We don't really care.
468 * Zero on success, negative errno on error.
470 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
473 u8 sensebuf[SCSI_SENSE_BUFFERSIZE];
474 u8 scsi_cmd[MAX_COMMAND_SIZE];
476 struct scsi_sense_hdr sshdr;
482 if (copy_from_user(args, arg, sizeof(args)))
485 memset(sensebuf, 0, sizeof(sensebuf));
486 memset(scsi_cmd, 0, sizeof(scsi_cmd));
487 scsi_cmd[0] = ATA_16;
488 scsi_cmd[1] = (3 << 1); /* Non-data */
489 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
490 scsi_cmd[4] = args[1];
491 scsi_cmd[6] = args[2];
492 scsi_cmd[8] = args[3];
493 scsi_cmd[10] = args[4];
494 scsi_cmd[12] = args[5];
495 scsi_cmd[13] = args[6] & 0x4f;
496 scsi_cmd[14] = args[0];
498 /* Good values for timeout and retries? Values below
499 from scsi_ioctl_send_command() for default case... */
500 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
501 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL);
503 if (cmd_result < 0) {
507 if (scsi_sense_valid(&sshdr)) {/* sense data available */
508 u8 *desc = sensebuf + 8;
510 /* If we set cc then ATA pass-through will cause a
511 * check condition even if no error. Filter that. */
512 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
513 if (sshdr.sense_key == RECOVERED_ERROR &&
514 sshdr.asc == 0 && sshdr.ascq == 0x1d)
515 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
518 /* Send userspace ATA registers */
519 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
520 desc[0] == 0x09) {/* code is "ATA Descriptor" */
521 args[0] = desc[13]; /* status */
522 args[1] = desc[3]; /* error */
523 args[2] = desc[5]; /* sector count (0:7) */
524 args[3] = desc[7]; /* lbal */
525 args[4] = desc[9]; /* lbam */
526 args[5] = desc[11]; /* lbah */
527 args[6] = desc[12]; /* select */
528 if (copy_to_user(arg, args, sizeof(args)))
542 static int ata_ioc32(struct ata_port *ap)
544 if (ap->flags & ATA_FLAG_PIO_DMA)
546 if (ap->pflags & ATA_PFLAG_PIO32)
552 * This handles both native and compat commands, so anything added
553 * here must have a compatible argument, or check in_compat_syscall()
555 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
556 unsigned int cmd, void __user *arg)
564 spin_lock_irqsave(ap->lock, flags);
566 spin_unlock_irqrestore(ap->lock, flags);
568 if (in_compat_syscall())
569 return put_user(val, (compat_ulong_t __user *)arg);
571 return put_user(val, (unsigned long __user *)arg);
574 val = (unsigned long) arg;
576 spin_lock_irqsave(ap->lock, flags);
577 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
579 ap->pflags |= ATA_PFLAG_PIO32;
581 ap->pflags &= ~ATA_PFLAG_PIO32;
583 if (val != ata_ioc32(ap))
586 spin_unlock_irqrestore(ap->lock, flags);
589 case HDIO_GET_IDENTITY:
590 return ata_get_identity(ap, scsidev, arg);
593 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
595 return ata_cmd_ioctl(scsidev, arg);
597 case HDIO_DRIVE_TASK:
598 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
600 return ata_task_ioctl(scsidev, arg);
609 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
611 int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd,
614 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
617 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
620 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
621 * @dev: ATA device to which the new command is attached
622 * @cmd: SCSI command that originated this ATA command
624 * Obtain a reference to an unused ata_queued_cmd structure,
625 * which is the basic libata structure representing a single
626 * ATA command sent to the hardware.
628 * If a command was available, fill in the SCSI-specific
629 * portions of the structure with information on the
633 * spin_lock_irqsave(host lock)
636 * Command allocated, or %NULL if none available.
638 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
639 struct scsi_cmnd *cmd)
641 struct ata_queued_cmd *qc;
643 qc = ata_qc_new_init(dev, scsi_cmd_to_rq(cmd)->tag);
646 qc->scsidone = scsi_done;
648 qc->sg = scsi_sglist(cmd);
649 qc->n_elem = scsi_sg_count(cmd);
651 if (scsi_cmd_to_rq(cmd)->rq_flags & RQF_QUIET)
652 qc->flags |= ATA_QCFLAG_QUIET;
654 cmd->result = (DID_OK << 16) | SAM_STAT_TASK_SET_FULL;
661 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
663 struct scsi_cmnd *scmd = qc->scsicmd;
665 qc->extrabytes = scmd->extra_len;
666 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
670 * ata_dump_status - user friendly display of error info
671 * @ap: the port in question
672 * @tf: ptr to filled out taskfile
674 * Decode and dump the ATA error/status registers for the user so
675 * that they have some idea what really happened at the non
676 * make-believe layer.
679 * inherited from caller
681 static void ata_dump_status(struct ata_port *ap, struct ata_taskfile *tf)
683 u8 stat = tf->status, err = tf->error;
685 if (stat & ATA_BUSY) {
686 ata_port_warn(ap, "status=0x%02x {Busy} ", stat);
688 ata_port_warn(ap, "status=0x%02x { %s%s%s%s%s%s%s} ", stat,
689 stat & ATA_DRDY ? "DriveReady " : "",
690 stat & ATA_DF ? "DeviceFault " : "",
691 stat & ATA_DSC ? "SeekComplete " : "",
692 stat & ATA_DRQ ? "DataRequest " : "",
693 stat & ATA_CORR ? "CorrectedError " : "",
694 stat & ATA_SENSE ? "Sense " : "",
695 stat & ATA_ERR ? "Error " : "");
697 ata_port_warn(ap, "error=0x%02x {%s%s%s%s%s%s", err,
699 "DriveStatusError " : "",
702 "BadCRC " : "Sector ") : "",
703 err & ATA_UNC ? "UncorrectableError " : "",
704 err & ATA_IDNF ? "SectorIdNotFound " : "",
705 err & ATA_TRK0NF ? "TrackZeroNotFound " : "",
706 err & ATA_AMNF ? "AddrMarkNotFound " : "");
711 * ata_to_sense_error - convert ATA error to SCSI error
712 * @id: ATA device number
713 * @drv_stat: value contained in ATA status register
714 * @drv_err: value contained in ATA error register
715 * @sk: the sense key we'll fill out
716 * @asc: the additional sense code we'll fill out
717 * @ascq: the additional sense code qualifier we'll fill out
718 * @verbose: be verbose
720 * Converts an ATA error into a SCSI error. Fill out pointers to
721 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
722 * format sense blocks.
725 * spin_lock_irqsave(host lock)
727 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
728 u8 *asc, u8 *ascq, int verbose)
732 /* Based on the 3ware driver translation table */
733 static const unsigned char sense_table[][4] = {
735 {0xd1, ABORTED_COMMAND, 0x00, 0x00},
736 // Device busy Aborted command
738 {0xd0, ABORTED_COMMAND, 0x00, 0x00},
739 // Device busy Aborted command
741 {0x61, HARDWARE_ERROR, 0x00, 0x00},
742 // Device fault Hardware error
743 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
744 {0x84, ABORTED_COMMAND, 0x47, 0x00},
745 // Data CRC error SCSI parity error
746 /* MC|ID|ABRT|TRK0|MARK */
747 {0x37, NOT_READY, 0x04, 0x00},
748 // Unit offline Not ready
750 {0x09, NOT_READY, 0x04, 0x00},
751 // Unrecovered disk error Not ready
752 /* Bad address mark */
753 {0x01, MEDIUM_ERROR, 0x13, 0x00},
754 // Address mark not found for data field
755 /* TRK0 - Track 0 not found */
756 {0x02, HARDWARE_ERROR, 0x00, 0x00},
758 /* Abort: 0x04 is not translated here, see below */
759 /* Media change request */
760 {0x08, NOT_READY, 0x04, 0x00},
761 // FIXME: faking offline
762 /* SRV/IDNF - ID not found */
763 {0x10, ILLEGAL_REQUEST, 0x21, 0x00},
764 // Logical address out of range
765 /* MC - Media Changed */
766 {0x20, UNIT_ATTENTION, 0x28, 0x00},
767 // Not ready to ready change, medium may have changed
768 /* ECC - Uncorrectable ECC error */
769 {0x40, MEDIUM_ERROR, 0x11, 0x04},
770 // Unrecovered read error
771 /* BBD - block marked bad */
772 {0x80, MEDIUM_ERROR, 0x11, 0x04},
773 // Block marked bad Medium error, unrecovered read error
774 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
776 static const unsigned char stat_table[][4] = {
777 /* Must be first because BUSY means no other bits valid */
778 {0x80, ABORTED_COMMAND, 0x47, 0x00},
779 // Busy, fake parity for now
780 {0x40, ILLEGAL_REQUEST, 0x21, 0x04},
781 // Device ready, unaligned write command
782 {0x20, HARDWARE_ERROR, 0x44, 0x00},
783 // Device fault, internal target failure
784 {0x08, ABORTED_COMMAND, 0x47, 0x00},
785 // Timed out in xfer, fake parity for now
786 {0x04, RECOVERED_ERROR, 0x11, 0x00},
787 // Recovered ECC error Medium error, recovered
788 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
792 * Is this an error we can process/parse
794 if (drv_stat & ATA_BUSY) {
795 drv_err = 0; /* Ignore the err bits, they're invalid */
799 /* Look for drv_err */
800 for (i = 0; sense_table[i][0] != 0xFF; i++) {
801 /* Look for best matches first */
802 if ((sense_table[i][0] & drv_err) ==
804 *sk = sense_table[i][1];
805 *asc = sense_table[i][2];
806 *ascq = sense_table[i][3];
813 * Fall back to interpreting status bits. Note that if the drv_err
814 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
815 * is not descriptive enough.
817 for (i = 0; stat_table[i][0] != 0xFF; i++) {
818 if (stat_table[i][0] & drv_stat) {
819 *sk = stat_table[i][1];
820 *asc = stat_table[i][2];
821 *ascq = stat_table[i][3];
827 * We need a sensible error return here, which is tricky, and one
828 * that won't cause people to do things like return a disk wrongly.
830 *sk = ABORTED_COMMAND;
836 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
837 id, drv_stat, drv_err, *sk, *asc, *ascq);
842 * ata_gen_passthru_sense - Generate check condition sense block.
843 * @qc: Command that completed.
845 * This function is specific to the ATA descriptor format sense
846 * block specified for the ATA pass through commands. Regardless
847 * of whether the command errored or not, return a sense
848 * block. Copy all controller registers into the sense
849 * block. If there was no error, we get the request from an ATA
850 * passthrough command, so we use the following sense data:
851 * sk = RECOVERED ERROR
852 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
858 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
860 struct scsi_cmnd *cmd = qc->scsicmd;
861 struct ata_taskfile *tf = &qc->result_tf;
862 unsigned char *sb = cmd->sense_buffer;
863 unsigned char *desc = sb + 8;
864 int verbose = qc->ap->ops->error_handler == NULL;
865 u8 sense_key, asc, ascq;
867 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
870 * Use ata_to_sense_error() to map status register bits
871 * onto sense key, asc & ascq.
874 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
875 ata_to_sense_error(qc->ap->print_id, tf->status, tf->error,
876 &sense_key, &asc, &ascq, verbose);
877 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq);
880 * ATA PASS-THROUGH INFORMATION AVAILABLE
881 * Always in descriptor format sense.
883 scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D);
886 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) {
889 /* descriptor format */
891 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9);
893 if (SCSI_SENSE_BUFFERSIZE < len + 14)
901 * Copy registers into sense buffer.
909 desc[12] = tf->device;
910 desc[13] = tf->status;
913 * Fill in Extend bit, and the high order bytes
916 if (tf->flags & ATA_TFLAG_LBA48) {
918 desc[4] = tf->hob_nsect;
919 desc[6] = tf->hob_lbal;
920 desc[8] = tf->hob_lbam;
921 desc[10] = tf->hob_lbah;
924 /* Fixed sense format */
926 desc[1] = tf->status;
927 desc[2] = tf->device;
930 if (tf->flags & ATA_TFLAG_LBA48) {
934 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah)
944 * ata_gen_ata_sense - generate a SCSI fixed sense block
945 * @qc: Command that we are erroring out
947 * Generate sense block for a failed ATA command @qc. Descriptor
948 * format is used to accommodate LBA48 block address.
953 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
955 struct ata_device *dev = qc->dev;
956 struct scsi_cmnd *cmd = qc->scsicmd;
957 struct ata_taskfile *tf = &qc->result_tf;
958 unsigned char *sb = cmd->sense_buffer;
959 int verbose = qc->ap->ops->error_handler == NULL;
961 u8 sense_key, asc, ascq;
963 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
965 if (ata_dev_disabled(dev)) {
966 /* Device disabled after error recovery */
967 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
968 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21);
971 /* Use ata_to_sense_error() to map status register bits
972 * onto sense key, asc & ascq.
975 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
976 ata_to_sense_error(qc->ap->print_id, tf->status, tf->error,
977 &sense_key, &asc, &ascq, verbose);
978 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq);
980 /* Could not decode error */
981 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n",
982 tf->status, qc->err_mask);
983 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0);
987 block = ata_tf_read_block(&qc->result_tf, dev);
988 if (block == U64_MAX)
991 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block);
994 void ata_scsi_sdev_config(struct scsi_device *sdev)
996 sdev->use_10_for_rw = 1;
997 sdev->use_10_for_ms = 1;
998 sdev->no_write_same = 1;
1000 /* Schedule policy is determined by ->qc_defer() callback and
1001 * it needs to see every deferred qc. Set dev_blocked to 1 to
1002 * prevent SCSI midlayer from automatically deferring
1005 sdev->max_device_blocked = 1;
1009 * ata_scsi_dma_need_drain - Check whether data transfer may overflow
1010 * @rq: request to be checked
1012 * ATAPI commands which transfer variable length data to host
1013 * might overflow due to application error or hardware bug. This
1014 * function checks whether overflow should be drained and ignored
1021 * 1 if ; otherwise, 0.
1023 bool ata_scsi_dma_need_drain(struct request *rq)
1025 struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq);
1027 return atapi_cmd_type(scmd->cmnd[0]) == ATAPI_MISC;
1029 EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain);
1031 int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev)
1033 struct request_queue *q = sdev->request_queue;
1035 if (!ata_id_has_unload(dev->id))
1036 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1038 /* configure max sectors */
1039 blk_queue_max_hw_sectors(q, dev->max_sectors);
1041 if (dev->class == ATA_DEV_ATAPI) {
1042 sdev->sector_size = ATA_SECT_SIZE;
1044 /* set DMA padding */
1045 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1047 /* make room for appending the drain */
1048 blk_queue_max_segments(q, queue_max_segments(q) - 1);
1050 sdev->dma_drain_len = ATAPI_MAX_DRAIN;
1051 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, GFP_NOIO);
1052 if (!sdev->dma_drain_buf) {
1053 ata_dev_err(dev, "drain buffer allocation failed\n");
1057 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1058 sdev->manage_start_stop = 1;
1062 * ata_pio_sectors() expects buffer for each sector to not cross
1063 * page boundary. Enforce it by requiring buffers to be sector
1064 * aligned, which works iff sector_size is not larger than
1065 * PAGE_SIZE. ATAPI devices also need the alignment as
1066 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1068 if (sdev->sector_size > PAGE_SIZE)
1070 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1073 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1075 if (dev->flags & ATA_DFLAG_AN)
1076 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1078 if (dev->flags & ATA_DFLAG_NCQ) {
1081 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1082 depth = min(ATA_MAX_QUEUE, depth);
1083 scsi_change_queue_depth(sdev, depth);
1086 if (dev->flags & ATA_DFLAG_TRUSTED)
1087 sdev->security_supported = 1;
1094 * ata_scsi_slave_config - Set SCSI device attributes
1095 * @sdev: SCSI device to examine
1097 * This is called before we actually start reading
1098 * and writing to the device, to configure certain
1099 * SCSI mid-layer behaviors.
1102 * Defined by SCSI layer. We don't really care.
1105 int ata_scsi_slave_config(struct scsi_device *sdev)
1107 struct ata_port *ap = ata_shost_to_port(sdev->host);
1108 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1111 ata_scsi_sdev_config(sdev);
1114 rc = ata_scsi_dev_config(sdev, dev);
1118 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
1121 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1122 * @sdev: SCSI device to be destroyed
1124 * @sdev is about to be destroyed for hot/warm unplugging. If
1125 * this unplugging was initiated by libata as indicated by NULL
1126 * dev->sdev, this function doesn't have to do anything.
1127 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1128 * Clear dev->sdev, schedule the device for ATA detach and invoke
1132 * Defined by SCSI layer. We don't really care.
1134 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1136 struct ata_port *ap = ata_shost_to_port(sdev->host);
1137 unsigned long flags;
1138 struct ata_device *dev;
1140 if (!ap->ops->error_handler)
1143 spin_lock_irqsave(ap->lock, flags);
1144 dev = __ata_scsi_find_dev(ap, sdev);
1145 if (dev && dev->sdev) {
1146 /* SCSI device already in CANCEL state, no need to offline it */
1148 dev->flags |= ATA_DFLAG_DETACH;
1149 ata_port_schedule_eh(ap);
1151 spin_unlock_irqrestore(ap->lock, flags);
1153 kfree(sdev->dma_drain_buf);
1155 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
1158 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1159 * @qc: Storage for translated ATA taskfile
1161 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1162 * (to start). Perhaps these commands should be preceded by
1163 * CHECK POWER MODE to see what power mode the device is already in.
1164 * [See SAT revision 5 at www.t10.org]
1167 * spin_lock_irqsave(host lock)
1170 * Zero on success, non-zero on error.
1172 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1174 struct scsi_cmnd *scmd = qc->scsicmd;
1175 struct ata_taskfile *tf = &qc->tf;
1176 const u8 *cdb = scmd->cmnd;
1180 if (scmd->cmd_len < 5) {
1185 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1186 tf->protocol = ATA_PROT_NODATA;
1188 ; /* ignore IMMED bit, violates sat-r05 */
1193 goto invalid_fld; /* LOEJ bit set not supported */
1195 if (((cdb[4] >> 4) & 0xf) != 0) {
1198 goto invalid_fld; /* power conditions not supported */
1202 tf->nsect = 1; /* 1 sector, lba=0 */
1204 if (qc->dev->flags & ATA_DFLAG_LBA) {
1205 tf->flags |= ATA_TFLAG_LBA;
1210 tf->device |= ATA_LBA;
1213 tf->lbal = 0x1; /* sect */
1214 tf->lbam = 0x0; /* cyl low */
1215 tf->lbah = 0x0; /* cyl high */
1218 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1220 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1221 * or S5) causing some drives to spin up and down again.
1223 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1224 system_state == SYSTEM_POWER_OFF)
1227 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1228 system_entering_hibernation())
1231 /* Issue ATA STANDBY IMMEDIATE command */
1232 tf->command = ATA_CMD_STANDBYNOW1;
1236 * Standby and Idle condition timers could be implemented but that
1237 * would require libata to implement the Power condition mode page
1238 * and allow the user to change it. Changing mode pages requires
1239 * MODE SELECT to be implemented.
1245 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
1248 scmd->result = SAM_STAT_GOOD;
1254 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1255 * @qc: Storage for translated ATA taskfile
1257 * Sets up an ATA taskfile to issue FLUSH CACHE or
1261 * spin_lock_irqsave(host lock)
1264 * Zero on success, non-zero on error.
1266 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1268 struct ata_taskfile *tf = &qc->tf;
1270 tf->flags |= ATA_TFLAG_DEVICE;
1271 tf->protocol = ATA_PROT_NODATA;
1273 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1274 tf->command = ATA_CMD_FLUSH_EXT;
1276 tf->command = ATA_CMD_FLUSH;
1278 /* flush is critical for IO integrity, consider it an IO command */
1279 qc->flags |= ATA_QCFLAG_IO;
1285 * scsi_6_lba_len - Get LBA and transfer length
1286 * @cdb: SCSI command to translate
1288 * Calculate LBA and transfer length for 6-byte commands.
1292 * @plen: the transfer length
1294 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1299 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1300 lba |= ((u64)cdb[2]) << 8;
1301 lba |= ((u64)cdb[3]);
1310 * scsi_10_lba_len - Get LBA and transfer length
1311 * @cdb: SCSI command to translate
1313 * Calculate LBA and transfer length for 10-byte commands.
1317 * @plen: the transfer length
1319 static inline void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1321 *plba = get_unaligned_be32(&cdb[2]);
1322 *plen = get_unaligned_be16(&cdb[7]);
1326 * scsi_16_lba_len - Get LBA and transfer length
1327 * @cdb: SCSI command to translate
1329 * Calculate LBA and transfer length for 16-byte commands.
1333 * @plen: the transfer length
1335 static inline void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1337 *plba = get_unaligned_be64(&cdb[2]);
1338 *plen = get_unaligned_be32(&cdb[10]);
1342 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1343 * @qc: Storage for translated ATA taskfile
1345 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1348 * spin_lock_irqsave(host lock)
1351 * Zero on success, non-zero on error.
1353 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1355 struct scsi_cmnd *scmd = qc->scsicmd;
1356 struct ata_taskfile *tf = &qc->tf;
1357 struct ata_device *dev = qc->dev;
1358 u64 dev_sectors = qc->dev->n_sectors;
1359 const u8 *cdb = scmd->cmnd;
1364 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1365 tf->protocol = ATA_PROT_NODATA;
1369 if (scmd->cmd_len < 10) {
1373 scsi_10_lba_len(cdb, &block, &n_block);
1376 if (scmd->cmd_len < 16) {
1380 scsi_16_lba_len(cdb, &block, &n_block);
1389 if (block >= dev_sectors)
1391 if ((block + n_block) > dev_sectors)
1394 if (dev->flags & ATA_DFLAG_LBA) {
1395 tf->flags |= ATA_TFLAG_LBA;
1397 if (lba_28_ok(block, n_block)) {
1399 tf->command = ATA_CMD_VERIFY;
1400 tf->device |= (block >> 24) & 0xf;
1401 } else if (lba_48_ok(block, n_block)) {
1402 if (!(dev->flags & ATA_DFLAG_LBA48))
1406 tf->flags |= ATA_TFLAG_LBA48;
1407 tf->command = ATA_CMD_VERIFY_EXT;
1409 tf->hob_nsect = (n_block >> 8) & 0xff;
1411 tf->hob_lbah = (block >> 40) & 0xff;
1412 tf->hob_lbam = (block >> 32) & 0xff;
1413 tf->hob_lbal = (block >> 24) & 0xff;
1415 /* request too large even for LBA48 */
1418 tf->nsect = n_block & 0xff;
1420 tf->lbah = (block >> 16) & 0xff;
1421 tf->lbam = (block >> 8) & 0xff;
1422 tf->lbal = block & 0xff;
1424 tf->device |= ATA_LBA;
1427 u32 sect, head, cyl, track;
1429 if (!lba_28_ok(block, n_block))
1432 /* Convert LBA to CHS */
1433 track = (u32)block / dev->sectors;
1434 cyl = track / dev->heads;
1435 head = track % dev->heads;
1436 sect = (u32)block % dev->sectors + 1;
1438 /* Check whether the converted CHS can fit.
1442 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1445 tf->command = ATA_CMD_VERIFY;
1446 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1449 tf->lbah = cyl >> 8;
1456 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1460 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1461 /* "Logical Block Address out of range" */
1465 scmd->result = SAM_STAT_GOOD;
1469 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks)
1471 struct request *rq = scsi_cmd_to_rq(scmd);
1474 if (!blk_rq_is_passthrough(rq))
1477 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size;
1478 if (n_blocks > req_blocks)
1485 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1486 * @qc: Storage for translated ATA taskfile
1488 * Converts any of six SCSI read/write commands into the
1489 * ATA counterpart, including starting sector (LBA),
1490 * sector count, and taking into account the device's LBA48
1493 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1494 * %WRITE_16 are currently supported.
1497 * spin_lock_irqsave(host lock)
1500 * Zero on success, non-zero on error.
1502 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1504 struct scsi_cmnd *scmd = qc->scsicmd;
1505 const u8 *cdb = scmd->cmnd;
1506 struct request *rq = scsi_cmd_to_rq(scmd);
1507 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
1508 unsigned int tf_flags = 0;
1518 tf_flags |= ATA_TFLAG_WRITE;
1522 /* Calculate the SCSI LBA, transfer length and FUA. */
1526 if (unlikely(scmd->cmd_len < 10)) {
1530 scsi_10_lba_len(cdb, &block, &n_block);
1531 if (cdb[1] & (1 << 3))
1532 tf_flags |= ATA_TFLAG_FUA;
1533 if (!ata_check_nblocks(scmd, n_block))
1538 if (unlikely(scmd->cmd_len < 6)) {
1542 scsi_6_lba_len(cdb, &block, &n_block);
1544 /* for 6-byte r/w commands, transfer length 0
1545 * means 256 blocks of data, not 0 block.
1549 if (!ata_check_nblocks(scmd, n_block))
1554 if (unlikely(scmd->cmd_len < 16)) {
1558 scsi_16_lba_len(cdb, &block, &n_block);
1559 if (cdb[1] & (1 << 3))
1560 tf_flags |= ATA_TFLAG_FUA;
1561 if (!ata_check_nblocks(scmd, n_block))
1569 /* Check and compose ATA command */
1571 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1572 * length 0 means transfer 0 block of data.
1573 * However, for ATA R/W commands, sector count 0 means
1574 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1576 * WARNING: one or two older ATA drives treat 0 as 0...
1580 qc->flags |= ATA_QCFLAG_IO;
1581 qc->nbytes = n_block * scmd->device->sector_size;
1583 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1586 if (likely(rc == 0))
1591 /* treat all other errors as -EINVAL, fall through */
1593 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1597 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1598 /* "Logical Block Address out of range" */
1602 scmd->result = SAM_STAT_GOOD;
1606 static void ata_qc_done(struct ata_queued_cmd *qc)
1608 struct scsi_cmnd *cmd = qc->scsicmd;
1609 void (*done)(struct scsi_cmnd *) = qc->scsidone;
1615 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1617 struct ata_port *ap = qc->ap;
1618 struct scsi_cmnd *cmd = qc->scsicmd;
1619 u8 *cdb = cmd->cmnd;
1620 int need_sense = (qc->err_mask != 0);
1622 /* For ATA pass thru (SAT) commands, generate a sense block if
1623 * user mandated it or if there's an error. Note that if we
1624 * generate because the user forced us to [CK_COND =1], a check
1625 * condition is generated and the ATA register values are returned
1626 * whether the command completed successfully or not. If there
1627 * was no error, we use the following sense data:
1628 * sk = RECOVERED ERROR
1629 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1631 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1632 ((cdb[2] & 0x20) || need_sense))
1633 ata_gen_passthru_sense(qc);
1634 else if (qc->flags & ATA_QCFLAG_SENSE_VALID)
1635 cmd->result = SAM_STAT_CHECK_CONDITION;
1636 else if (need_sense)
1637 ata_gen_ata_sense(qc);
1639 cmd->result = SAM_STAT_GOOD;
1641 if (need_sense && !ap->ops->error_handler)
1642 ata_dump_status(ap, &qc->result_tf);
1648 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1649 * @dev: ATA device to which the command is addressed
1650 * @cmd: SCSI command to execute
1651 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1653 * Our ->queuecommand() function has decided that the SCSI
1654 * command issued can be directly translated into an ATA
1655 * command, rather than handled internally.
1657 * This function sets up an ata_queued_cmd structure for the
1658 * SCSI command, and sends that ata_queued_cmd to the hardware.
1660 * The xlat_func argument (actor) returns 0 if ready to execute
1661 * ATA command, else 1 to finish translation. If 1 is returned
1662 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1663 * to be set reflecting an error condition or clean (early)
1667 * spin_lock_irqsave(host lock)
1670 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1671 * needs to be deferred.
1673 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1674 ata_xlat_func_t xlat_func)
1676 struct ata_port *ap = dev->link->ap;
1677 struct ata_queued_cmd *qc;
1680 qc = ata_scsi_qc_new(dev, cmd);
1684 /* data is present; dma-map it */
1685 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1686 cmd->sc_data_direction == DMA_TO_DEVICE) {
1687 if (unlikely(scsi_bufflen(cmd) < 1)) {
1688 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
1692 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1694 qc->dma_dir = cmd->sc_data_direction;
1697 qc->complete_fn = ata_scsi_qc_complete;
1702 if (ap->ops->qc_defer) {
1703 if ((rc = ap->ops->qc_defer(qc)))
1707 /* select device, send command to hardware */
1719 cmd->result = (DID_ERROR << 16);
1726 if (rc == ATA_DEFER_LINK)
1727 return SCSI_MLQUEUE_DEVICE_BUSY;
1729 return SCSI_MLQUEUE_HOST_BUSY;
1732 struct ata_scsi_args {
1733 struct ata_device *dev;
1735 struct scsi_cmnd *cmd;
1739 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1740 * @args: device IDENTIFY data / SCSI command of interest.
1741 * @actor: Callback hook for desired SCSI command simulator
1743 * Takes care of the hard work of simulating a SCSI command...
1744 * Mapping the response buffer, calling the command's handler,
1745 * and handling the handler's return value. This return value
1746 * indicates whether the handler wishes the SCSI command to be
1747 * completed successfully (0), or not (in which case cmd->result
1748 * and sense buffer are assumed to be set).
1751 * spin_lock_irqsave(host lock)
1753 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1754 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1757 struct scsi_cmnd *cmd = args->cmd;
1758 unsigned long flags;
1760 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
1762 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1763 rc = actor(args, ata_scsi_rbuf);
1765 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1766 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1768 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
1771 cmd->result = SAM_STAT_GOOD;
1775 * ata_scsiop_inq_std - Simulate INQUIRY command
1776 * @args: device IDENTIFY data / SCSI command of interest.
1777 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1779 * Returns standard device identification data associated
1780 * with non-VPD INQUIRY command output.
1783 * spin_lock_irqsave(host lock)
1785 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1787 static const u8 versions[] = {
1789 0x60, /* SAM-3 (no version claimed) */
1792 0x20, /* SBC-2 (no version claimed) */
1795 0x00 /* SPC-3 (no version claimed) */
1797 static const u8 versions_zbc[] = {
1799 0xA0, /* SAM-5 (no version claimed) */
1802 0x00, /* SBC-4 (no version claimed) */
1805 0xC0, /* SPC-5 (no version claimed) */
1814 0x5, /* claim SPC-3 version compatibility */
1822 /* set scsi removable (RMB) bit per ata bit, or if the
1823 * AHCI port says it's external (Hotplug-capable, eSATA).
1825 if (ata_id_removable(args->id) ||
1826 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL))
1829 if (args->dev->class == ATA_DEV_ZAC) {
1831 hdr[2] = 0x7; /* claim SPC-5 version compatibility */
1834 memcpy(rbuf, hdr, sizeof(hdr));
1835 memcpy(&rbuf[8], "ATA ", 8);
1836 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1838 /* From SAT, use last 2 words from fw rev unless they are spaces */
1839 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
1840 if (strncmp(&rbuf[32], " ", 4) == 0)
1841 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1843 if (rbuf[32] == 0 || rbuf[32] == ' ')
1844 memcpy(&rbuf[32], "n/a ", 4);
1846 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC)
1847 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc));
1849 memcpy(rbuf + 58, versions, sizeof(versions));
1855 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1856 * @args: device IDENTIFY data / SCSI command of interest.
1857 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1859 * Returns list of inquiry VPD pages available.
1862 * spin_lock_irqsave(host lock)
1864 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1866 int i, num_pages = 0;
1867 static const u8 pages[] = {
1868 0x00, /* page 0x00, this page */
1869 0x80, /* page 0x80, unit serial no page */
1870 0x83, /* page 0x83, device ident page */
1871 0x89, /* page 0x89, ata info page */
1872 0xb0, /* page 0xb0, block limits page */
1873 0xb1, /* page 0xb1, block device characteristics page */
1874 0xb2, /* page 0xb2, thin provisioning page */
1875 0xb6, /* page 0xb6, zoned block device characteristics */
1876 0xb9, /* page 0xb9, concurrent positioning ranges */
1879 for (i = 0; i < sizeof(pages); i++) {
1880 if (pages[i] == 0xb6 &&
1881 !(args->dev->flags & ATA_DFLAG_ZAC))
1883 rbuf[num_pages + 4] = pages[i];
1886 rbuf[3] = num_pages; /* number of supported VPD pages */
1891 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1892 * @args: device IDENTIFY data / SCSI command of interest.
1893 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1895 * Returns ATA device serial number.
1898 * spin_lock_irqsave(host lock)
1900 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
1902 static const u8 hdr[] = {
1904 0x80, /* this page code */
1906 ATA_ID_SERNO_LEN, /* page len */
1909 memcpy(rbuf, hdr, sizeof(hdr));
1910 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1911 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1916 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1917 * @args: device IDENTIFY data / SCSI command of interest.
1918 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1920 * Yields two logical unit device identification designators:
1921 * - vendor specific ASCII containing the ATA serial number
1922 * - SAT defined "t10 vendor id based" containing ASCII vendor
1923 * name ("ATA "), model and serial numbers.
1926 * spin_lock_irqsave(host lock)
1928 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
1930 const int sat_model_serial_desc_len = 68;
1933 rbuf[1] = 0x83; /* this page code */
1936 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1938 rbuf[num + 3] = ATA_ID_SERNO_LEN;
1940 ata_id_string(args->id, (unsigned char *) rbuf + num,
1941 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1942 num += ATA_ID_SERNO_LEN;
1944 /* SAT defined lu model and serial numbers descriptor */
1945 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1948 rbuf[num + 3] = sat_model_serial_desc_len;
1950 memcpy(rbuf + num, "ATA ", 8);
1952 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
1954 num += ATA_ID_PROD_LEN;
1955 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
1957 num += ATA_ID_SERNO_LEN;
1959 if (ata_id_has_wwn(args->id)) {
1960 /* SAT defined lu world wide name */
1961 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
1964 rbuf[num + 3] = ATA_ID_WWN_LEN;
1966 ata_id_string(args->id, (unsigned char *) rbuf + num,
1967 ATA_ID_WWN, ATA_ID_WWN_LEN);
1968 num += ATA_ID_WWN_LEN;
1970 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1975 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
1976 * @args: device IDENTIFY data / SCSI command of interest.
1977 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1979 * Yields SAT-specified ATA VPD page.
1982 * spin_lock_irqsave(host lock)
1984 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
1986 rbuf[1] = 0x89; /* our page code */
1987 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
1988 rbuf[3] = (0x238 & 0xff);
1990 memcpy(&rbuf[8], "linux ", 8);
1991 memcpy(&rbuf[16], "libata ", 16);
1992 memcpy(&rbuf[32], DRV_VERSION, 4);
1994 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
1995 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */
1998 /* we don't store the ATA device signature, so we fake it */
1999 rbuf[38] = ATA_DRDY; /* really, this is Status reg */
2003 rbuf[56] = ATA_CMD_ID_ATA;
2005 memcpy(&rbuf[60], &args->id[0], 512);
2009 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2011 struct ata_device *dev = args->dev;
2015 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2018 * Optimal transfer length granularity.
2020 * This is always one physical block, but for disks with a smaller
2021 * logical than physical sector size we need to figure out what the
2024 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2025 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2028 * Optimal unmap granularity.
2030 * The ATA spec doesn't even know about a granularity or alignment
2031 * for the TRIM command. We can leave away most of the unmap related
2032 * VPD page entries, but we have specifify a granularity to signal
2033 * that we support some form of unmap - in thise case via WRITE SAME
2034 * with the unmap bit set.
2036 if (ata_id_has_trim(args->id)) {
2037 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM;
2039 if (dev->horkage & ATA_HORKAGE_MAX_TRIM_128M)
2040 max_blocks = 128 << (20 - SECTOR_SHIFT);
2042 put_unaligned_be64(max_blocks, &rbuf[36]);
2043 put_unaligned_be32(1, &rbuf[28]);
2049 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2051 int form_factor = ata_id_form_factor(args->id);
2052 int media_rotation_rate = ata_id_rotation_rate(args->id);
2053 u8 zoned = ata_id_zoned_cap(args->id);
2057 rbuf[4] = media_rotation_rate >> 8;
2058 rbuf[5] = media_rotation_rate;
2059 rbuf[7] = form_factor;
2061 rbuf[8] = (zoned << 4);
2066 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2068 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2071 rbuf[5] = 1 << 6; /* TPWS */
2076 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf)
2079 * zbc-r05 SCSI Zoned Block device characteristics VPD page
2085 * URSWRZ bit is only meaningful for host-managed ZAC drives
2087 if (args->dev->zac_zoned_cap & 1)
2089 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]);
2090 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]);
2091 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]);
2096 static unsigned int ata_scsiop_inq_b9(struct ata_scsi_args *args, u8 *rbuf)
2098 struct ata_cpr_log *cpr_log = args->dev->cpr_log;
2099 u8 *desc = &rbuf[64];
2102 /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */
2104 put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[3]);
2106 for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) {
2107 desc[0] = cpr_log->cpr[i].num;
2108 desc[1] = cpr_log->cpr[i].num_storage_elements;
2109 put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]);
2110 put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]);
2117 * modecpy - Prepare response for MODE SENSE
2118 * @dest: output buffer
2119 * @src: data being copied
2120 * @n: length of mode page
2121 * @changeable: whether changeable parameters are requested
2123 * Generate a generic MODE SENSE page for either current or changeable
2129 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2132 memcpy(dest, src, 2);
2133 memset(dest + 2, 0, n - 2);
2135 memcpy(dest, src, n);
2140 * ata_msense_caching - Simulate MODE SENSE caching info page
2141 * @id: device IDENTIFY data
2142 * @buf: output buffer
2143 * @changeable: whether changeable parameters are requested
2145 * Generate a caching info page, which conditionally indicates
2146 * write caching to the SCSI layer, depending on device
2152 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2154 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2156 buf[2] |= (1 << 2); /* ata_mselect_caching() */
2158 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */
2159 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */
2161 return sizeof(def_cache_mpage);
2165 * ata_msense_control - Simulate MODE SENSE control mode page
2166 * @dev: ATA device of interest
2167 * @buf: output buffer
2168 * @changeable: whether changeable parameters are requested
2170 * Generate a generic MODE SENSE control mode page.
2175 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf,
2178 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2180 buf[2] |= (1 << 2); /* ata_mselect_control() */
2182 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
2184 buf[2] |= (d_sense << 2); /* descriptor format sense data */
2186 return sizeof(def_control_mpage);
2190 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2191 * @buf: output buffer
2192 * @changeable: whether changeable parameters are requested
2194 * Generate a generic MODE SENSE r/w error recovery page.
2199 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2201 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2203 return sizeof(def_rw_recovery_mpage);
2207 * We can turn this into a real blacklist if it's needed, for now just
2208 * blacklist any Maxtor BANC1G10 revision firmware
2210 static int ata_dev_supports_fua(u16 *id)
2212 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2216 if (!ata_id_has_fua(id))
2219 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2220 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2222 if (strcmp(model, "Maxtor"))
2224 if (strcmp(fw, "BANC1G10"))
2227 return 0; /* blacklisted */
2231 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2232 * @args: device IDENTIFY data / SCSI command of interest.
2233 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2235 * Simulate MODE SENSE commands. Assume this is invoked for direct
2236 * access devices (e.g. disks) only. There should be no block
2237 * descriptor for other device types.
2240 * spin_lock_irqsave(host lock)
2242 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2244 struct ata_device *dev = args->dev;
2245 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2246 static const u8 sat_blk_desc[] = {
2247 0, 0, 0, 0, /* number of blocks: sat unspecified */
2249 0, 0x2, 0x0 /* block length: 512 bytes */
2252 unsigned int ebd, page_control, six_byte;
2253 u8 dpofua, bp = 0xff;
2256 six_byte = (scsicmd[0] == MODE_SENSE);
2257 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2259 * LLBA bit in msense(10) ignored (compliant)
2262 page_control = scsicmd[2] >> 6;
2263 switch (page_control) {
2264 case 0: /* current */
2265 case 1: /* changeable */
2266 case 2: /* defaults */
2267 break; /* supported */
2269 goto saving_not_supp;
2277 p += 4 + (ebd ? 8 : 0);
2279 p += 8 + (ebd ? 8 : 0);
2281 pg = scsicmd[2] & 0x3f;
2284 * No mode subpages supported (yet) but asking for _all_
2285 * subpages may be valid
2287 if (spg && (spg != ALL_SUB_MPAGES)) {
2293 case RW_RECOVERY_MPAGE:
2294 p += ata_msense_rw_recovery(p, page_control == 1);
2298 p += ata_msense_caching(args->id, p, page_control == 1);
2302 p += ata_msense_control(args->dev, p, page_control == 1);
2306 p += ata_msense_rw_recovery(p, page_control == 1);
2307 p += ata_msense_caching(args->id, p, page_control == 1);
2308 p += ata_msense_control(args->dev, p, page_control == 1);
2311 default: /* invalid page code */
2317 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2318 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2322 rbuf[0] = p - rbuf - 1;
2325 rbuf[3] = sizeof(sat_blk_desc);
2326 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2329 unsigned int output_len = p - rbuf - 2;
2331 rbuf[0] = output_len >> 8;
2332 rbuf[1] = output_len;
2335 rbuf[7] = sizeof(sat_blk_desc);
2336 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2342 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp);
2346 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2347 /* "Saving parameters not supported" */
2352 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2353 * @args: device IDENTIFY data / SCSI command of interest.
2354 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2356 * Simulate READ CAPACITY commands.
2361 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2363 struct ata_device *dev = args->dev;
2364 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2365 u32 sector_size; /* physical sector size in bytes */
2369 sector_size = ata_id_logical_sector_size(dev->id);
2370 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2371 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2373 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2374 if (last_lba >= 0xffffffffULL)
2375 last_lba = 0xffffffff;
2377 /* sector count, 32-bit */
2378 rbuf[0] = last_lba >> (8 * 3);
2379 rbuf[1] = last_lba >> (8 * 2);
2380 rbuf[2] = last_lba >> (8 * 1);
2384 rbuf[4] = sector_size >> (8 * 3);
2385 rbuf[5] = sector_size >> (8 * 2);
2386 rbuf[6] = sector_size >> (8 * 1);
2387 rbuf[7] = sector_size;
2389 /* sector count, 64-bit */
2390 rbuf[0] = last_lba >> (8 * 7);
2391 rbuf[1] = last_lba >> (8 * 6);
2392 rbuf[2] = last_lba >> (8 * 5);
2393 rbuf[3] = last_lba >> (8 * 4);
2394 rbuf[4] = last_lba >> (8 * 3);
2395 rbuf[5] = last_lba >> (8 * 2);
2396 rbuf[6] = last_lba >> (8 * 1);
2400 rbuf[ 8] = sector_size >> (8 * 3);
2401 rbuf[ 9] = sector_size >> (8 * 2);
2402 rbuf[10] = sector_size >> (8 * 1);
2403 rbuf[11] = sector_size;
2406 rbuf[13] = log2_per_phys;
2407 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2408 rbuf[15] = lowest_aligned;
2410 if (ata_id_has_trim(args->id) &&
2411 !(dev->horkage & ATA_HORKAGE_NOTRIM)) {
2412 rbuf[14] |= 0x80; /* LBPME */
2414 if (ata_id_has_zero_after_trim(args->id) &&
2415 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) {
2416 ata_dev_info(dev, "Enabling discard_zeroes_data\n");
2417 rbuf[14] |= 0x40; /* LBPRZ */
2420 if (ata_id_zoned_cap(args->id) ||
2421 args->dev->class == ATA_DEV_ZAC)
2422 rbuf[12] = (1 << 4); /* RC_BASIS */
2428 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2429 * @args: device IDENTIFY data / SCSI command of interest.
2430 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2432 * Simulate REPORT LUNS command.
2435 * spin_lock_irqsave(host lock)
2437 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2439 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2444 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2446 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2447 /* FIXME: not quite right; we don't want the
2448 * translation of taskfile registers into
2449 * a sense descriptors, since that's only
2450 * correct for ATA, not ATAPI
2452 ata_gen_passthru_sense(qc);
2458 /* is it pointless to prefer PIO for "safety reasons"? */
2459 static inline int ata_pio_use_silly(struct ata_port *ap)
2461 return (ap->flags & ATA_FLAG_PIO_DMA);
2464 static void atapi_request_sense(struct ata_queued_cmd *qc)
2466 struct ata_port *ap = qc->ap;
2467 struct scsi_cmnd *cmd = qc->scsicmd;
2469 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2471 #ifdef CONFIG_ATA_SFF
2472 if (ap->ops->sff_tf_read)
2473 ap->ops->sff_tf_read(ap, &qc->tf);
2476 /* fill these in, for the case where they are -not- overwritten */
2477 cmd->sense_buffer[0] = 0x70;
2478 cmd->sense_buffer[2] = qc->tf.error >> 4;
2482 /* setup sg table and init transfer direction */
2483 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2484 ata_sg_init(qc, &qc->sgent, 1);
2485 qc->dma_dir = DMA_FROM_DEVICE;
2487 memset(&qc->cdb, 0, qc->dev->cdb_len);
2488 qc->cdb[0] = REQUEST_SENSE;
2489 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2491 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2492 qc->tf.command = ATA_CMD_PACKET;
2494 if (ata_pio_use_silly(ap)) {
2495 qc->tf.protocol = ATAPI_PROT_DMA;
2496 qc->tf.feature |= ATAPI_PKT_DMA;
2498 qc->tf.protocol = ATAPI_PROT_PIO;
2499 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2502 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2504 qc->complete_fn = atapi_sense_complete;
2510 * ATAPI devices typically report zero for their SCSI version, and sometimes
2511 * deviate from the spec WRT response data format. If SCSI version is
2512 * reported as zero like normal, then we make the following fixups:
2513 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a
2515 * 2) Ensure response data format / ATAPI information are always correct.
2517 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd)
2521 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2526 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2529 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2531 struct scsi_cmnd *cmd = qc->scsicmd;
2532 unsigned int err_mask = qc->err_mask;
2534 /* handle completion from new EH */
2535 if (unlikely(qc->ap->ops->error_handler &&
2536 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2538 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2539 /* FIXME: not quite right; we don't want the
2540 * translation of taskfile registers into a
2541 * sense descriptors, since that's only
2542 * correct for ATA, not ATAPI
2544 ata_gen_passthru_sense(qc);
2547 /* SCSI EH automatically locks door if sdev->locked is
2548 * set. Sometimes door lock request continues to
2549 * fail, for example, when no media is present. This
2550 * creates a loop - SCSI EH issues door lock which
2551 * fails and gets invoked again to acquire sense data
2552 * for the failed command.
2554 * If door lock fails, always clear sdev->locked to
2555 * avoid this infinite loop.
2557 * This may happen before SCSI scan is complete. Make
2558 * sure qc->dev->sdev isn't NULL before dereferencing.
2560 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2561 qc->dev->sdev->locked = 0;
2563 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2568 /* successful completion or old EH failure path */
2569 if (unlikely(err_mask & AC_ERR_DEV)) {
2570 cmd->result = SAM_STAT_CHECK_CONDITION;
2571 atapi_request_sense(qc);
2573 } else if (unlikely(err_mask)) {
2574 /* FIXME: not quite right; we don't want the
2575 * translation of taskfile registers into
2576 * a sense descriptors, since that's only
2577 * correct for ATA, not ATAPI
2579 ata_gen_passthru_sense(qc);
2581 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0)
2582 atapi_fixup_inquiry(cmd);
2583 cmd->result = SAM_STAT_GOOD;
2589 * atapi_xlat - Initialize PACKET taskfile
2590 * @qc: command structure to be initialized
2593 * spin_lock_irqsave(host lock)
2596 * Zero on success, non-zero on failure.
2598 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2600 struct scsi_cmnd *scmd = qc->scsicmd;
2601 struct ata_device *dev = qc->dev;
2602 int nodata = (scmd->sc_data_direction == DMA_NONE);
2603 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2604 unsigned int nbytes;
2606 memset(qc->cdb, 0, dev->cdb_len);
2607 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2609 qc->complete_fn = atapi_qc_complete;
2611 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2612 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2613 qc->tf.flags |= ATA_TFLAG_WRITE;
2616 qc->tf.command = ATA_CMD_PACKET;
2617 ata_qc_set_pc_nbytes(qc);
2619 /* check whether ATAPI DMA is safe */
2620 if (!nodata && !using_pio && atapi_check_dma(qc))
2623 /* Some controller variants snoop this value for Packet
2624 * transfers to do state machine and FIFO management. Thus we
2625 * want to set it properly, and for DMA where it is
2626 * effectively meaningless.
2628 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2630 /* Most ATAPI devices which honor transfer chunk size don't
2631 * behave according to the spec when odd chunk size which
2632 * matches the transfer length is specified. If the number of
2633 * bytes to transfer is 2n+1. According to the spec, what
2634 * should happen is to indicate that 2n+1 is going to be
2635 * transferred and transfer 2n+2 bytes where the last byte is
2638 * In practice, this doesn't happen. ATAPI devices first
2639 * indicate and transfer 2n bytes and then indicate and
2640 * transfer 2 bytes where the last byte is padding.
2642 * This inconsistency confuses several controllers which
2643 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2644 * These controllers use actual number of transferred bytes to
2645 * update DMA pointer and transfer of 4n+2 bytes make those
2646 * controller push DMA pointer by 4n+4 bytes because SATA data
2647 * FISes are aligned to 4 bytes. This causes data corruption
2648 * and buffer overrun.
2650 * Always setting nbytes to even number solves this problem
2651 * because then ATAPI devices don't have to split data at 2n
2657 qc->tf.lbam = (nbytes & 0xFF);
2658 qc->tf.lbah = (nbytes >> 8);
2661 qc->tf.protocol = ATAPI_PROT_NODATA;
2663 qc->tf.protocol = ATAPI_PROT_PIO;
2666 qc->tf.protocol = ATAPI_PROT_DMA;
2667 qc->tf.feature |= ATAPI_PKT_DMA;
2669 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2670 (scmd->sc_data_direction != DMA_TO_DEVICE))
2671 /* some SATA bridges need us to indicate data xfer direction */
2672 qc->tf.feature |= ATAPI_DMADIR;
2676 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2677 as ATAPI tape drives don't get this right otherwise */
2681 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2683 if (!sata_pmp_attached(ap)) {
2684 if (likely(devno >= 0 &&
2685 devno < ata_link_max_devices(&ap->link)))
2686 return &ap->link.device[devno];
2688 if (likely(devno >= 0 &&
2689 devno < ap->nr_pmp_links))
2690 return &ap->pmp_link[devno].device[0];
2696 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2697 const struct scsi_device *scsidev)
2701 /* skip commands not addressed to targets we simulate */
2702 if (!sata_pmp_attached(ap)) {
2703 if (unlikely(scsidev->channel || scsidev->lun))
2705 devno = scsidev->id;
2707 if (unlikely(scsidev->id || scsidev->lun))
2709 devno = scsidev->channel;
2712 return ata_find_dev(ap, devno);
2716 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2717 * @ap: ATA port to which the device is attached
2718 * @scsidev: SCSI device from which we derive the ATA device
2720 * Given various information provided in struct scsi_cmnd,
2721 * map that onto an ATA bus, and using that mapping
2722 * determine which ata_device is associated with the
2723 * SCSI command to be sent.
2726 * spin_lock_irqsave(host lock)
2729 * Associated ATA device, or %NULL if not found.
2732 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2734 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2736 if (unlikely(!dev || !ata_dev_enabled(dev)))
2743 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2744 * @byte1: Byte 1 from pass-thru CDB.
2747 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2750 ata_scsi_map_proto(u8 byte1)
2752 switch((byte1 & 0x1e) >> 1) {
2753 case 3: /* Non-data */
2754 return ATA_PROT_NODATA;
2757 case 10: /* UDMA Data-in */
2758 case 11: /* UDMA Data-Out */
2759 return ATA_PROT_DMA;
2761 case 4: /* PIO Data-in */
2762 case 5: /* PIO Data-out */
2763 return ATA_PROT_PIO;
2765 case 12: /* FPDMA */
2766 return ATA_PROT_NCQ;
2768 case 0: /* Hard Reset */
2770 case 8: /* Device Diagnostic */
2771 case 9: /* Device Reset */
2772 case 7: /* DMA Queued */
2773 case 15: /* Return Response Info */
2774 default: /* Reserved */
2778 return ATA_PROT_UNKNOWN;
2782 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2783 * @qc: command structure to be initialized
2785 * Handles either 12, 16, or 32-byte versions of the CDB.
2788 * Zero on success, non-zero on failure.
2790 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2792 struct ata_taskfile *tf = &(qc->tf);
2793 struct scsi_cmnd *scmd = qc->scsicmd;
2794 struct ata_device *dev = qc->dev;
2795 const u8 *cdb = scmd->cmnd;
2799 /* 7Fh variable length cmd means a ata pass-thru(32) */
2800 if (cdb[0] == VARIABLE_LENGTH_CMD)
2803 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]);
2804 if (tf->protocol == ATA_PROT_UNKNOWN) {
2809 if ((cdb[2 + cdb_offset] & 0x3) == 0) {
2811 * When T_LENGTH is zero (No data is transferred), dir should
2814 if (scmd->sc_data_direction != DMA_NONE) {
2815 fp = 2 + cdb_offset;
2819 if (ata_is_ncq(tf->protocol))
2820 tf->protocol = ATA_PROT_NCQ_NODATA;
2824 tf->flags |= ATA_TFLAG_LBA;
2827 * 12 and 16 byte CDBs use different offsets to
2828 * provide the various register values.
2833 * 16-byte CDB - may contain extended commands.
2835 * If that is the case, copy the upper byte register values.
2837 if (cdb[1] & 0x01) {
2838 tf->hob_feature = cdb[3];
2839 tf->hob_nsect = cdb[5];
2840 tf->hob_lbal = cdb[7];
2841 tf->hob_lbam = cdb[9];
2842 tf->hob_lbah = cdb[11];
2843 tf->flags |= ATA_TFLAG_LBA48;
2845 tf->flags &= ~ATA_TFLAG_LBA48;
2848 * Always copy low byte, device and command registers.
2850 tf->feature = cdb[4];
2855 tf->device = cdb[13];
2856 tf->command = cdb[14];
2860 * 12-byte CDB - incapable of extended commands.
2862 tf->flags &= ~ATA_TFLAG_LBA48;
2864 tf->feature = cdb[3];
2869 tf->device = cdb[8];
2870 tf->command = cdb[9];
2874 * 32-byte CDB - may contain extended command fields.
2876 * If that is the case, copy the upper byte register values.
2878 if (cdb[10] & 0x01) {
2879 tf->hob_feature = cdb[20];
2880 tf->hob_nsect = cdb[22];
2881 tf->hob_lbal = cdb[16];
2882 tf->hob_lbam = cdb[15];
2883 tf->hob_lbah = cdb[14];
2884 tf->flags |= ATA_TFLAG_LBA48;
2886 tf->flags &= ~ATA_TFLAG_LBA48;
2888 tf->feature = cdb[21];
2889 tf->nsect = cdb[23];
2893 tf->device = cdb[24];
2894 tf->command = cdb[25];
2895 tf->auxiliary = get_unaligned_be32(&cdb[28]);
2899 /* For NCQ commands copy the tag value */
2900 if (ata_is_ncq(tf->protocol))
2901 tf->nsect = qc->hw_tag << 3;
2903 /* enforce correct master/slave bit */
2904 tf->device = dev->devno ?
2905 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2907 switch (tf->command) {
2908 /* READ/WRITE LONG use a non-standard sect_size */
2909 case ATA_CMD_READ_LONG:
2910 case ATA_CMD_READ_LONG_ONCE:
2911 case ATA_CMD_WRITE_LONG:
2912 case ATA_CMD_WRITE_LONG_ONCE:
2913 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) {
2917 qc->sect_size = scsi_bufflen(scmd);
2920 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2921 case ATA_CMD_CFA_WRITE_NE:
2922 case ATA_CMD_CFA_TRANS_SECT:
2923 case ATA_CMD_CFA_WRITE_MULT_NE:
2924 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2926 case ATA_CMD_READ_EXT:
2927 case ATA_CMD_READ_QUEUED:
2928 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2929 case ATA_CMD_FPDMA_READ:
2930 case ATA_CMD_READ_MULTI:
2931 case ATA_CMD_READ_MULTI_EXT:
2932 case ATA_CMD_PIO_READ:
2933 case ATA_CMD_PIO_READ_EXT:
2934 case ATA_CMD_READ_STREAM_DMA_EXT:
2935 case ATA_CMD_READ_STREAM_EXT:
2936 case ATA_CMD_VERIFY:
2937 case ATA_CMD_VERIFY_EXT:
2939 case ATA_CMD_WRITE_EXT:
2940 case ATA_CMD_WRITE_FUA_EXT:
2941 case ATA_CMD_WRITE_QUEUED:
2942 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
2943 case ATA_CMD_FPDMA_WRITE:
2944 case ATA_CMD_WRITE_MULTI:
2945 case ATA_CMD_WRITE_MULTI_EXT:
2946 case ATA_CMD_WRITE_MULTI_FUA_EXT:
2947 case ATA_CMD_PIO_WRITE:
2948 case ATA_CMD_PIO_WRITE_EXT:
2949 case ATA_CMD_WRITE_STREAM_DMA_EXT:
2950 case ATA_CMD_WRITE_STREAM_EXT:
2951 qc->sect_size = scmd->device->sector_size;
2954 /* Everything else uses 512 byte "sectors" */
2956 qc->sect_size = ATA_SECT_SIZE;
2960 * Set flags so that all registers will be written, pass on
2961 * write indication (used for PIO/DMA setup), result TF is
2962 * copied back and we don't whine too much about its failure.
2964 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2965 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2966 tf->flags |= ATA_TFLAG_WRITE;
2968 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2971 * Set transfer length.
2973 * TODO: find out if we need to do more here to
2974 * cover scatter/gather case.
2976 ata_qc_set_pc_nbytes(qc);
2978 /* We may not issue DMA commands if no DMA mode is set */
2979 if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) {
2984 /* We may not issue NCQ commands to devices not supporting NCQ */
2985 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) {
2990 /* sanity check for pio multi commands */
2991 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) {
2996 if (is_multi_taskfile(tf)) {
2997 unsigned int multi_count = 1 << (cdb[1] >> 5);
2999 /* compare the passed through multi_count
3000 * with the cached multi_count of libata
3002 if (multi_count != dev->multi_count)
3003 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3008 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3009 * SET_FEATURES - XFER MODE must be preceded/succeeded
3010 * by an update to hardware-specific registers for each
3011 * controller (i.e. the reason for ->set_piomode(),
3012 * ->set_dmamode(), and ->post_set_mode() hooks).
3014 if (tf->command == ATA_CMD_SET_FEATURES &&
3015 tf->feature == SETFEATURES_XFER) {
3016 fp = (cdb[0] == ATA_16) ? 4 : 3;
3021 * Filter TPM commands by default. These provide an
3022 * essentially uncontrolled encrypted "back door" between
3023 * applications and the disk. Set libata.allow_tpm=1 if you
3024 * have a real reason for wanting to use them. This ensures
3025 * that installed software cannot easily mess stuff up without
3026 * user intent. DVR type users will probably ship with this enabled
3027 * for movie content management.
3029 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3030 * for this and should do in future but that it is not sufficient as
3031 * DCS is an optional feature set. Thus we also do the software filter
3032 * so that we comply with the TC consortium stated goal that the user
3033 * can turn off TC features of their system.
3035 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) {
3036 fp = (cdb[0] == ATA_16) ? 14 : 9;
3043 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff);
3048 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim
3049 * @cmd: SCSI command being translated
3050 * @trmax: Maximum number of entries that will fit in sector_size bytes.
3051 * @sector: Starting sector
3052 * @count: Total Range of request in logical sectors
3054 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted
3057 * Upto 64 entries of the format:
3058 * 63:48 Range Length
3061 * Range Length of 0 is ignored.
3062 * LBA's should be sorted order and not overlap.
3064 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET
3066 * Return: Number of bytes copied into sglist.
3068 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax,
3069 u64 sector, u32 count)
3071 struct scsi_device *sdp = cmd->device;
3072 size_t len = sdp->sector_size;
3076 unsigned long flags;
3078 WARN_ON(len > ATA_SCSI_RBUF_SIZE);
3080 if (len > ATA_SCSI_RBUF_SIZE)
3081 len = ATA_SCSI_RBUF_SIZE;
3083 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
3084 buf = ((void *)ata_scsi_rbuf);
3085 memset(buf, 0, len);
3087 u64 entry = sector |
3088 ((u64)(count > 0xffff ? 0xffff : count) << 48);
3089 buf[i++] = __cpu_to_le64(entry);
3090 if (count <= 0xffff)
3095 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len);
3096 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
3102 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same
3103 * @qc: Command to be translated
3105 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or
3106 * an SCT Write Same command.
3107 * Based on WRITE SAME has the UNMAP flag:
3109 * - When set translate to DSM TRIM
3110 * - When clear translate to SCT Write Same
3112 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3114 struct ata_taskfile *tf = &qc->tf;
3115 struct scsi_cmnd *scmd = qc->scsicmd;
3116 struct scsi_device *sdp = scmd->device;
3117 size_t len = sdp->sector_size;
3118 struct ata_device *dev = qc->dev;
3119 const u8 *cdb = scmd->cmnd;
3122 const u32 trmax = len >> 3;
3126 u8 unmap = cdb[1] & 0x8;
3128 /* we may not issue DMA commands if no DMA mode is set */
3129 if (unlikely(!ata_dma_enabled(dev)))
3130 goto invalid_opcode;
3133 * We only allow sending this command through the block layer,
3134 * as it modifies the DATA OUT buffer, which would corrupt user
3135 * memory for SG_IO commands.
3137 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd))))
3138 goto invalid_opcode;
3140 if (unlikely(scmd->cmd_len < 16)) {
3144 scsi_16_lba_len(cdb, &block, &n_block);
3147 (dev->horkage & ATA_HORKAGE_NOTRIM) ||
3148 !ata_id_has_trim(dev->id)) {
3153 /* If the request is too large the cmd is invalid */
3154 if (n_block > 0xffff * trmax) {
3160 * WRITE SAME always has a sector sized buffer as payload, this
3161 * should never be a multiple entry S/G list.
3163 if (!scsi_sg_count(scmd))
3164 goto invalid_param_len;
3167 * size must match sector size in bytes
3168 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count)
3169 * is defined as number of 512 byte blocks to be transferred.
3172 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block);
3174 goto invalid_param_len;
3176 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3177 /* Newer devices support queued TRIM commands */
3178 tf->protocol = ATA_PROT_NCQ;
3179 tf->command = ATA_CMD_FPDMA_SEND;
3180 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3181 tf->nsect = qc->hw_tag << 3;
3182 tf->hob_feature = (size / 512) >> 8;
3183 tf->feature = size / 512;
3187 tf->protocol = ATA_PROT_DMA;
3188 tf->hob_feature = 0;
3189 tf->feature = ATA_DSM_TRIM;
3190 tf->hob_nsect = (size / 512) >> 8;
3191 tf->nsect = size / 512;
3192 tf->command = ATA_CMD_DSM;
3195 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3198 ata_qc_set_pc_nbytes(qc);
3203 ata_scsi_set_invalid_field(dev, scmd, fp, bp);
3206 /* "Parameter list length error" */
3207 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3210 /* "Invalid command operation code" */
3211 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0);
3216 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN
3217 * @args: device MAINTENANCE_IN data / SCSI command of interest.
3218 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
3220 * Yields a subset to satisfy scsi_report_opcode()
3223 * spin_lock_irqsave(host lock)
3225 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf)
3227 struct ata_device *dev = args->dev;
3228 u8 *cdb = args->cmd->cmnd;
3230 unsigned int err = 0;
3233 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]);
3242 case SERVICE_ACTION_IN_16:
3245 case SYNCHRONIZE_CACHE:
3249 case TEST_UNIT_READY:
3250 case SEND_DIAGNOSTIC:
3251 case MAINTENANCE_IN:
3263 case MODE_SELECT_10:
3269 if (ata_id_zoned_cap(dev->id) ||
3270 dev->class == ATA_DEV_ZAC)
3273 case SECURITY_PROTOCOL_IN:
3274 case SECURITY_PROTOCOL_OUT:
3275 if (dev->flags & ATA_DFLAG_TRUSTED)
3282 rbuf[1] = supported; /* supported */
3287 * ata_scsi_report_zones_complete - convert ATA output
3288 * @qc: command structure returning the data
3290 * Convert T-13 little-endian field representation into
3291 * T-10 big-endian field representation.
3294 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc)
3296 struct scsi_cmnd *scmd = qc->scsicmd;
3297 struct sg_mapping_iter miter;
3298 unsigned long flags;
3299 unsigned int bytes = 0;
3301 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd),
3302 SG_MITER_TO_SG | SG_MITER_ATOMIC);
3304 local_irq_save(flags);
3305 while (sg_miter_next(&miter)) {
3306 unsigned int offset = 0;
3311 u64 max_lba, opt_lba;
3314 /* Swizzle header */
3316 list_length = get_unaligned_le32(&hdr[0]);
3317 same = get_unaligned_le16(&hdr[4]);
3318 max_lba = get_unaligned_le64(&hdr[8]);
3319 opt_lba = get_unaligned_le64(&hdr[16]);
3320 put_unaligned_be32(list_length, &hdr[0]);
3321 hdr[4] = same & 0xf;
3322 put_unaligned_be64(max_lba, &hdr[8]);
3323 put_unaligned_be64(opt_lba, &hdr[16]);
3327 while (offset < miter.length) {
3329 u8 cond, type, non_seq, reset;
3330 u64 size, start, wp;
3332 /* Swizzle zone descriptor */
3333 rec = miter.addr + offset;
3334 type = rec[0] & 0xf;
3335 cond = (rec[1] >> 4) & 0xf;
3336 non_seq = (rec[1] & 2);
3337 reset = (rec[1] & 1);
3338 size = get_unaligned_le64(&rec[8]);
3339 start = get_unaligned_le64(&rec[16]);
3340 wp = get_unaligned_le64(&rec[24]);
3342 rec[1] = (cond << 4) | non_seq | reset;
3343 put_unaligned_be64(size, &rec[8]);
3344 put_unaligned_be64(start, &rec[16]);
3345 put_unaligned_be64(wp, &rec[24]);
3346 WARN_ON(offset + 64 > miter.length);
3351 sg_miter_stop(&miter);
3352 local_irq_restore(flags);
3354 ata_scsi_qc_complete(qc);
3357 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc)
3359 struct ata_taskfile *tf = &qc->tf;
3360 struct scsi_cmnd *scmd = qc->scsicmd;
3361 const u8 *cdb = scmd->cmnd;
3362 u16 sect, fp = (u16)-1;
3363 u8 sa, options, bp = 0xff;
3367 if (unlikely(scmd->cmd_len < 16)) {
3368 ata_dev_warn(qc->dev, "invalid cdb length %d\n",
3373 scsi_16_lba_len(cdb, &block, &n_block);
3374 if (n_block != scsi_bufflen(scmd)) {
3375 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n",
3376 n_block, scsi_bufflen(scmd));
3377 goto invalid_param_len;
3380 if (sa != ZI_REPORT_ZONES) {
3381 ata_dev_warn(qc->dev, "invalid service action %d\n", sa);
3386 * ZAC allows only for transfers in 512 byte blocks,
3387 * and uses a 16 bit value for the transfer count.
3389 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) {
3390 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block);
3391 goto invalid_param_len;
3393 sect = n_block / 512;
3394 options = cdb[14] & 0xbf;
3396 if (ata_ncq_enabled(qc->dev) &&
3397 ata_fpdma_zac_mgmt_in_supported(qc->dev)) {
3398 tf->protocol = ATA_PROT_NCQ;
3399 tf->command = ATA_CMD_FPDMA_RECV;
3400 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f;
3401 tf->nsect = qc->hw_tag << 3;
3402 tf->feature = sect & 0xff;
3403 tf->hob_feature = (sect >> 8) & 0xff;
3404 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8);
3406 tf->command = ATA_CMD_ZAC_MGMT_IN;
3407 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES;
3408 tf->protocol = ATA_PROT_DMA;
3409 tf->hob_feature = options;
3410 tf->hob_nsect = (sect >> 8) & 0xff;
3411 tf->nsect = sect & 0xff;
3413 tf->device = ATA_LBA;
3414 tf->lbah = (block >> 16) & 0xff;
3415 tf->lbam = (block >> 8) & 0xff;
3416 tf->lbal = block & 0xff;
3417 tf->hob_lbah = (block >> 40) & 0xff;
3418 tf->hob_lbam = (block >> 32) & 0xff;
3419 tf->hob_lbal = (block >> 24) & 0xff;
3421 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3422 qc->flags |= ATA_QCFLAG_RESULT_TF;
3424 ata_qc_set_pc_nbytes(qc);
3426 qc->complete_fn = ata_scsi_report_zones_complete;
3431 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
3435 /* "Parameter list length error" */
3436 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3440 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc)
3442 struct ata_taskfile *tf = &qc->tf;
3443 struct scsi_cmnd *scmd = qc->scsicmd;
3444 struct ata_device *dev = qc->dev;
3445 const u8 *cdb = scmd->cmnd;
3451 if (unlikely(scmd->cmd_len < 16)) {
3457 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) &&
3458 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) {
3463 scsi_16_lba_len(cdb, &block, &n_block);
3466 * ZAC MANAGEMENT OUT doesn't define any length
3468 goto invalid_param_len;
3471 all = cdb[14] & 0x1;
3474 * Ignore the block address (zone ID) as defined by ZBC.
3477 } else if (block >= dev->n_sectors) {
3479 * Block must be a valid zone ID (a zone start LBA).
3485 if (ata_ncq_enabled(qc->dev) &&
3486 ata_fpdma_zac_mgmt_out_supported(qc->dev)) {
3487 tf->protocol = ATA_PROT_NCQ_NODATA;
3488 tf->command = ATA_CMD_NCQ_NON_DATA;
3489 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT;
3490 tf->nsect = qc->hw_tag << 3;
3491 tf->auxiliary = sa | ((u16)all << 8);
3493 tf->protocol = ATA_PROT_NODATA;
3494 tf->command = ATA_CMD_ZAC_MGMT_OUT;
3496 tf->hob_feature = all;
3498 tf->lbah = (block >> 16) & 0xff;
3499 tf->lbam = (block >> 8) & 0xff;
3500 tf->lbal = block & 0xff;
3501 tf->hob_lbah = (block >> 40) & 0xff;
3502 tf->hob_lbam = (block >> 32) & 0xff;
3503 tf->hob_lbal = (block >> 24) & 0xff;
3504 tf->device = ATA_LBA;
3505 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3510 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
3513 /* "Parameter list length error" */
3514 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3519 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3520 * @qc: Storage for translated ATA taskfile
3521 * @buf: input buffer
3522 * @len: number of valid bytes in the input buffer
3523 * @fp: out parameter for the failed field on error
3525 * Prepare a taskfile to modify caching information for the device.
3530 static int ata_mselect_caching(struct ata_queued_cmd *qc,
3531 const u8 *buf, int len, u16 *fp)
3533 struct ata_taskfile *tf = &qc->tf;
3534 struct ata_device *dev = qc->dev;
3535 u8 mpage[CACHE_MPAGE_LEN];
3540 * The first two bytes of def_cache_mpage are a header, so offsets
3541 * in mpage are off by 2 compared to buf. Same for len.
3544 if (len != CACHE_MPAGE_LEN - 2) {
3545 *fp = min(len, CACHE_MPAGE_LEN - 2);
3549 wce = buf[0] & (1 << 2);
3552 * Check that read-only bits are not modified.
3554 ata_msense_caching(dev->id, mpage, false);
3555 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) {
3558 if (mpage[i + 2] != buf[i]) {
3564 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3565 tf->protocol = ATA_PROT_NODATA;
3567 tf->command = ATA_CMD_SET_FEATURES;
3568 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3573 * ata_mselect_control - Simulate MODE SELECT for control page
3574 * @qc: Storage for translated ATA taskfile
3575 * @buf: input buffer
3576 * @len: number of valid bytes in the input buffer
3577 * @fp: out parameter for the failed field on error
3579 * Prepare a taskfile to modify caching information for the device.
3584 static int ata_mselect_control(struct ata_queued_cmd *qc,
3585 const u8 *buf, int len, u16 *fp)
3587 struct ata_device *dev = qc->dev;
3588 u8 mpage[CONTROL_MPAGE_LEN];
3593 * The first two bytes of def_control_mpage are a header, so offsets
3594 * in mpage are off by 2 compared to buf. Same for len.
3597 if (len != CONTROL_MPAGE_LEN - 2) {
3598 *fp = min(len, CONTROL_MPAGE_LEN - 2);
3602 d_sense = buf[0] & (1 << 2);
3605 * Check that read-only bits are not modified.
3607 ata_msense_control(dev, mpage, false);
3608 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) {
3611 if (mpage[2 + i] != buf[i]) {
3616 if (d_sense & (1 << 2))
3617 dev->flags |= ATA_DFLAG_D_SENSE;
3619 dev->flags &= ~ATA_DFLAG_D_SENSE;
3624 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands
3625 * @qc: Storage for translated ATA taskfile
3627 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3628 * Assume this is invoked for direct access devices (e.g. disks) only.
3629 * There should be no block descriptor for other device types.
3632 * spin_lock_irqsave(host lock)
3634 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3636 struct scsi_cmnd *scmd = qc->scsicmd;
3637 const u8 *cdb = scmd->cmnd;
3639 unsigned six_byte, pg_len, hdr_len, bd_len;
3644 const u8 *p = buffer;
3646 six_byte = (cdb[0] == MODE_SELECT);
3648 if (scmd->cmd_len < 5) {
3656 if (scmd->cmd_len < 9) {
3661 len = get_unaligned_be16(&cdb[7]);
3665 /* We only support PF=1, SP=0. */
3666 if ((cdb[1] & 0x11) != 0x10) {
3668 bp = (cdb[1] & 0x01) ? 1 : 5;
3672 /* Test early for possible overrun. */
3673 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
3674 goto invalid_param_len;
3676 /* Move past header and block descriptors. */
3678 goto invalid_param_len;
3680 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd),
3681 buffer, sizeof(buffer)))
3682 goto invalid_param_len;
3687 bd_len = get_unaligned_be16(&p[6]);
3692 goto invalid_param_len;
3693 if (bd_len != 0 && bd_len != 8) {
3694 fp = (six_byte) ? 3 : 6;
3695 fp += bd_len + hdr_len;
3704 /* Parse both possible formats for the mode page headers. */
3708 goto invalid_param_len;
3711 pg_len = get_unaligned_be16(&p[2]);
3716 goto invalid_param_len;
3725 * No mode subpages supported (yet) but asking for _all_
3726 * subpages may be valid
3728 if (spg && (spg != ALL_SUB_MPAGES)) {
3729 fp = (p[0] & 0x40) ? 1 : 0;
3730 fp += hdr_len + bd_len;
3734 goto invalid_param_len;
3738 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) {
3739 fp += hdr_len + bd_len;
3744 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) {
3745 fp += hdr_len + bd_len;
3748 goto skip; /* No ATA command to send */
3751 default: /* invalid page code */
3752 fp = bd_len + hdr_len;
3757 * Only one page has changeable data, so we only support setting one
3766 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
3770 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp);
3774 /* "Parameter list length error" */
3775 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3779 scmd->result = SAM_STAT_GOOD;
3783 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma)
3786 return ATA_CMD_TRUSTED_NONDATA;
3788 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND;
3790 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV;
3793 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc)
3795 struct scsi_cmnd *scmd = qc->scsicmd;
3796 const u8 *cdb = scmd->cmnd;
3797 struct ata_taskfile *tf = &qc->tf;
3799 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT);
3800 u16 spsp = get_unaligned_be16(&cdb[2]);
3801 u32 len = get_unaligned_be32(&cdb[6]);
3802 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO);
3805 * We don't support the ATA "security" protocol.
3808 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0);
3812 if (cdb[4] & 7) { /* INC_512 */
3814 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0);
3818 if (len > 0x01fffe00) {
3819 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0);
3823 /* convert to the sector-based ATA addressing */
3824 len = (len + 511) / 512;
3827 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO;
3828 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA;
3830 tf->flags |= ATA_TFLAG_WRITE;
3831 tf->command = ata_scsi_trusted_op(len, send, dma);
3833 tf->lbam = spsp & 0xff;
3834 tf->lbah = spsp >> 8;
3837 tf->nsect = len & 0xff;
3838 tf->lbal = len >> 8;
3841 tf->lbah = (1 << 7);
3844 ata_qc_set_pc_nbytes(qc);
3849 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler
3850 * @qc: Command to be translated
3852 * Translate a SCSI variable length CDB to specified commands.
3853 * It checks a service action value in CDB to call corresponding handler.
3856 * Zero on success, non-zero on failure
3859 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc)
3861 struct scsi_cmnd *scmd = qc->scsicmd;
3862 const u8 *cdb = scmd->cmnd;
3863 const u16 sa = get_unaligned_be16(&cdb[8]);
3866 * if service action represents a ata pass-thru(32) command,
3867 * then pass it to ata_scsi_pass_thru handler.
3870 return ata_scsi_pass_thru(qc);
3872 /* unsupported service action */
3877 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3879 * @cmd: SCSI command opcode to consider
3881 * Look up the SCSI command given, and determine whether the
3882 * SCSI command is to be translated or simulated.
3885 * Pointer to translation function if possible, %NULL if not.
3888 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3898 return ata_scsi_rw_xlat;
3901 return ata_scsi_write_same_xlat;
3903 case SYNCHRONIZE_CACHE:
3904 if (ata_try_flush_cache(dev))
3905 return ata_scsi_flush_xlat;
3910 return ata_scsi_verify_xlat;
3914 return ata_scsi_pass_thru;
3916 case VARIABLE_LENGTH_CMD:
3917 return ata_scsi_var_len_cdb_xlat;
3920 case MODE_SELECT_10:
3921 return ata_scsi_mode_select_xlat;
3924 return ata_scsi_zbc_in_xlat;
3927 return ata_scsi_zbc_out_xlat;
3929 case SECURITY_PROTOCOL_IN:
3930 case SECURITY_PROTOCOL_OUT:
3931 if (!(dev->flags & ATA_DFLAG_TRUSTED))
3933 return ata_scsi_security_inout_xlat;
3936 return ata_scsi_start_stop_xlat;
3942 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev)
3944 u8 scsi_op = scmd->cmnd[0];
3945 ata_xlat_func_t xlat_func;
3947 if (unlikely(!scmd->cmd_len))
3950 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
3951 if (unlikely(scmd->cmd_len > dev->cdb_len))
3954 xlat_func = ata_get_xlat_func(dev, scsi_op);
3955 } else if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3956 /* relay SCSI command to ATAPI device */
3957 int len = COMMAND_SIZE(scsi_op);
3959 if (unlikely(len > scmd->cmd_len ||
3960 len > dev->cdb_len ||
3961 scmd->cmd_len > ATAPI_CDB_LEN))
3964 xlat_func = atapi_xlat;
3966 /* ATA_16 passthru, treat as an ATA command */
3967 if (unlikely(scmd->cmd_len > 16))
3970 xlat_func = ata_get_xlat_func(dev, scsi_op);
3974 return ata_scsi_translate(dev, scmd, xlat_func);
3976 ata_scsi_simulate(dev, scmd);
3981 scmd->result = DID_ERROR << 16;
3987 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3988 * @shost: SCSI host of command to be sent
3989 * @cmd: SCSI command to be sent
3991 * In some cases, this function translates SCSI commands into
3992 * ATA taskfiles, and queues the taskfiles to be sent to
3993 * hardware. In other cases, this function simulates a
3994 * SCSI device by evaluating and responding to certain
3995 * SCSI commands. This creates the overall effect of
3996 * ATA and ATAPI devices appearing as SCSI devices.
4002 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4005 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
4007 struct ata_port *ap;
4008 struct ata_device *dev;
4009 struct scsi_device *scsidev = cmd->device;
4011 unsigned long irq_flags;
4013 ap = ata_shost_to_port(shost);
4015 spin_lock_irqsave(ap->lock, irq_flags);
4017 dev = ata_scsi_find_dev(ap, scsidev);
4019 rc = __ata_scsi_queuecmd(cmd, dev);
4021 cmd->result = (DID_BAD_TARGET << 16);
4025 spin_unlock_irqrestore(ap->lock, irq_flags);
4029 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
4032 * ata_scsi_simulate - simulate SCSI command on ATA device
4033 * @dev: the target device
4034 * @cmd: SCSI command being sent to device.
4036 * Interprets and directly executes a select list of SCSI commands
4037 * that can be handled internally.
4040 * spin_lock_irqsave(host lock)
4043 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
4045 struct ata_scsi_args args;
4046 const u8 *scsicmd = cmd->cmnd;
4053 switch(scsicmd[0]) {
4055 if (scsicmd[1] & 2) /* is CmdDt set? */
4056 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4057 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
4058 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
4059 else switch (scsicmd[2]) {
4061 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
4064 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
4067 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
4070 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
4073 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
4076 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
4079 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
4082 if (dev->flags & ATA_DFLAG_ZAC)
4083 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6);
4085 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
4089 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b9);
4091 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
4094 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
4101 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
4105 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4108 case SERVICE_ACTION_IN_16:
4109 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
4110 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4112 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4116 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
4120 ata_scsi_set_sense(dev, cmd, 0, 0, 0);
4123 /* if we reach this, then writeback caching is disabled,
4124 * turning this into a no-op.
4126 case SYNCHRONIZE_CACHE:
4129 /* no-op's, complete with success */
4133 case TEST_UNIT_READY:
4136 case SEND_DIAGNOSTIC:
4137 tmp8 = scsicmd[1] & ~(1 << 3);
4138 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4])
4139 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4142 case MAINTENANCE_IN:
4143 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES)
4144 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in);
4146 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4149 /* all other commands */
4151 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0);
4152 /* "Invalid command operation code" */
4159 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
4163 for (i = 0; i < host->n_ports; i++) {
4164 struct ata_port *ap = host->ports[i];
4165 struct Scsi_Host *shost;
4168 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
4172 shost->eh_noresume = 1;
4173 *(struct ata_port **)&shost->hostdata[0] = ap;
4174 ap->scsi_host = shost;
4176 shost->transportt = ata_scsi_transport_template;
4177 shost->unique_id = ap->print_id;
4180 shost->max_channel = 1;
4181 shost->max_cmd_len = 32;
4183 /* Schedule policy is determined by ->qc_defer()
4184 * callback and it needs to see every deferred qc.
4185 * Set host_blocked to 1 to prevent SCSI midlayer from
4186 * automatically deferring requests.
4188 shost->max_host_blocked = 1;
4190 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev);
4199 struct Scsi_Host *shost = host->ports[i]->scsi_host;
4201 /* scsi_host_put() is in ata_devres_release() */
4202 scsi_remove_host(shost);
4208 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap)
4210 struct scsi_device *sdev = dev->sdev;
4211 struct device *d = ap->host->dev;
4212 struct device_node *np = d->of_node;
4213 struct device_node *child;
4215 for_each_available_child_of_node(np, child) {
4219 ret = of_property_read_u32(child, "reg", &val);
4222 if (val == dev->devno) {
4223 dev_dbg(d, "found matching device node\n");
4224 sdev->sdev_gendev.of_node = child;
4230 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap)
4235 void ata_scsi_scan_host(struct ata_port *ap, int sync)
4238 struct ata_device *last_failed_dev = NULL;
4239 struct ata_link *link;
4240 struct ata_device *dev;
4243 ata_for_each_link(link, ap, EDGE) {
4244 ata_for_each_dev(dev, link, ENABLED) {
4245 struct scsi_device *sdev;
4246 int channel = 0, id = 0;
4251 if (ata_is_host_link(link))
4254 channel = link->pmp;
4256 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
4258 if (!IS_ERR(sdev)) {
4260 ata_scsi_assign_ofnode(dev, ap);
4261 scsi_device_put(sdev);
4268 /* If we scanned while EH was in progress or allocation
4269 * failure occurred, scan would have failed silently. Check
4270 * whether all devices are attached.
4272 ata_for_each_link(link, ap, EDGE) {
4273 ata_for_each_dev(dev, link, ENABLED) {
4282 /* we're missing some SCSI devices */
4284 /* If caller requested synchrnous scan && we've made
4285 * any progress, sleep briefly and repeat.
4287 if (dev != last_failed_dev) {
4289 last_failed_dev = dev;
4293 /* We might be failing to detect boot device, give it
4294 * a few more chances.
4302 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
4305 queue_delayed_work(system_long_wq, &ap->hotplug_task,
4306 round_jiffies_relative(HZ));
4310 * ata_scsi_offline_dev - offline attached SCSI device
4311 * @dev: ATA device to offline attached SCSI device for
4313 * This function is called from ata_eh_hotplug() and responsible
4314 * for taking the SCSI device attached to @dev offline. This
4315 * function is called with host lock which protects dev->sdev
4319 * spin_lock_irqsave(host lock)
4322 * 1 if attached SCSI device exists, 0 otherwise.
4324 int ata_scsi_offline_dev(struct ata_device *dev)
4327 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
4334 * ata_scsi_remove_dev - remove attached SCSI device
4335 * @dev: ATA device to remove attached SCSI device for
4337 * This function is called from ata_eh_scsi_hotplug() and
4338 * responsible for removing the SCSI device attached to @dev.
4341 * Kernel thread context (may sleep).
4343 static void ata_scsi_remove_dev(struct ata_device *dev)
4345 struct ata_port *ap = dev->link->ap;
4346 struct scsi_device *sdev;
4347 unsigned long flags;
4349 /* Alas, we need to grab scan_mutex to ensure SCSI device
4350 * state doesn't change underneath us and thus
4351 * scsi_device_get() always succeeds. The mutex locking can
4352 * be removed if there is __scsi_device_get() interface which
4353 * increments reference counts regardless of device state.
4355 mutex_lock(&ap->scsi_host->scan_mutex);
4356 spin_lock_irqsave(ap->lock, flags);
4358 /* clearing dev->sdev is protected by host lock */
4363 /* If user initiated unplug races with us, sdev can go
4364 * away underneath us after the host lock and
4365 * scan_mutex are released. Hold onto it.
4367 if (scsi_device_get(sdev) == 0) {
4368 /* The following ensures the attached sdev is
4369 * offline on return from ata_scsi_offline_dev()
4370 * regardless it wins or loses the race
4371 * against this function.
4373 scsi_device_set_state(sdev, SDEV_OFFLINE);
4380 spin_unlock_irqrestore(ap->lock, flags);
4381 mutex_unlock(&ap->scsi_host->scan_mutex);
4384 ata_dev_info(dev, "detaching (SCSI %s)\n",
4385 dev_name(&sdev->sdev_gendev));
4387 scsi_remove_device(sdev);
4388 scsi_device_put(sdev);
4392 static void ata_scsi_handle_link_detach(struct ata_link *link)
4394 struct ata_port *ap = link->ap;
4395 struct ata_device *dev;
4397 ata_for_each_dev(dev, link, ALL) {
4398 unsigned long flags;
4400 if (!(dev->flags & ATA_DFLAG_DETACHED))
4403 spin_lock_irqsave(ap->lock, flags);
4404 dev->flags &= ~ATA_DFLAG_DETACHED;
4405 spin_unlock_irqrestore(ap->lock, flags);
4407 if (zpodd_dev_enabled(dev))
4410 ata_scsi_remove_dev(dev);
4415 * ata_scsi_media_change_notify - send media change event
4416 * @dev: Pointer to the disk device with media change event
4418 * Tell the block layer to send a media change notification
4422 * spin_lock_irqsave(host lock)
4424 void ata_scsi_media_change_notify(struct ata_device *dev)
4427 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
4432 * ata_scsi_hotplug - SCSI part of hotplug
4433 * @work: Pointer to ATA port to perform SCSI hotplug on
4435 * Perform SCSI part of hotplug. It's executed from a separate
4436 * workqueue after EH completes. This is necessary because SCSI
4437 * hot plugging requires working EH and hot unplugging is
4438 * synchronized with hot plugging with a mutex.
4441 * Kernel thread context (may sleep).
4443 void ata_scsi_hotplug(struct work_struct *work)
4445 struct ata_port *ap =
4446 container_of(work, struct ata_port, hotplug_task.work);
4449 if (ap->pflags & ATA_PFLAG_UNLOADING)
4452 mutex_lock(&ap->scsi_scan_mutex);
4454 /* Unplug detached devices. We cannot use link iterator here
4455 * because PMP links have to be scanned even if PMP is
4456 * currently not attached. Iterate manually.
4458 ata_scsi_handle_link_detach(&ap->link);
4460 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
4461 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
4463 /* scan for new ones */
4464 ata_scsi_scan_host(ap, 0);
4466 mutex_unlock(&ap->scsi_scan_mutex);
4470 * ata_scsi_user_scan - indication for user-initiated bus scan
4471 * @shost: SCSI host to scan
4472 * @channel: Channel to scan
4476 * This function is called when user explicitly requests bus
4477 * scan. Set probe pending flag and invoke EH.
4480 * SCSI layer (we don't care)
4485 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
4486 unsigned int id, u64 lun)
4488 struct ata_port *ap = ata_shost_to_port(shost);
4489 unsigned long flags;
4492 if (!ap->ops->error_handler)
4495 if (lun != SCAN_WILD_CARD && lun)
4498 if (!sata_pmp_attached(ap)) {
4499 if (channel != SCAN_WILD_CARD && channel)
4503 if (id != SCAN_WILD_CARD && id)
4508 spin_lock_irqsave(ap->lock, flags);
4510 if (devno == SCAN_WILD_CARD) {
4511 struct ata_link *link;
4513 ata_for_each_link(link, ap, EDGE) {
4514 struct ata_eh_info *ehi = &link->eh_info;
4515 ehi->probe_mask |= ATA_ALL_DEVICES;
4516 ehi->action |= ATA_EH_RESET;
4519 struct ata_device *dev = ata_find_dev(ap, devno);
4522 struct ata_eh_info *ehi = &dev->link->eh_info;
4523 ehi->probe_mask |= 1 << dev->devno;
4524 ehi->action |= ATA_EH_RESET;
4530 ata_port_schedule_eh(ap);
4531 spin_unlock_irqrestore(ap->lock, flags);
4532 ata_port_wait_eh(ap);
4534 spin_unlock_irqrestore(ap->lock, flags);
4540 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4541 * @work: Pointer to ATA port to perform scsi_rescan_device()
4543 * After ATA pass thru (SAT) commands are executed successfully,
4544 * libata need to propagate the changes to SCSI layer.
4547 * Kernel thread context (may sleep).
4549 void ata_scsi_dev_rescan(struct work_struct *work)
4551 struct ata_port *ap =
4552 container_of(work, struct ata_port, scsi_rescan_task);
4553 struct ata_link *link;
4554 struct ata_device *dev;
4555 unsigned long flags;
4557 mutex_lock(&ap->scsi_scan_mutex);
4558 spin_lock_irqsave(ap->lock, flags);
4560 ata_for_each_link(link, ap, EDGE) {
4561 ata_for_each_dev(dev, link, ENABLED) {
4562 struct scsi_device *sdev = dev->sdev;
4566 if (scsi_device_get(sdev))
4569 spin_unlock_irqrestore(ap->lock, flags);
4570 scsi_rescan_device(&(sdev->sdev_gendev));
4571 scsi_device_put(sdev);
4572 spin_lock_irqsave(ap->lock, flags);
4576 spin_unlock_irqrestore(ap->lock, flags);
4577 mutex_unlock(&ap->scsi_scan_mutex);