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_port *ap = dev->link->ap;
642 struct ata_queued_cmd *qc;
645 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
648 if (ap->flags & ATA_FLAG_SAS_HOST) {
650 * SAS hosts may queue > ATA_MAX_QUEUE commands so use
651 * unique per-device budget token as a tag.
653 if (WARN_ON_ONCE(cmd->budget_token >= ATA_MAX_QUEUE))
655 tag = cmd->budget_token;
657 tag = scsi_cmd_to_rq(cmd)->tag;
660 qc = __ata_qc_from_tag(ap, tag);
661 qc->tag = qc->hw_tag = tag;
668 qc->scsidone = scsi_done;
670 qc->sg = scsi_sglist(cmd);
671 qc->n_elem = scsi_sg_count(cmd);
673 if (scsi_cmd_to_rq(cmd)->rq_flags & RQF_QUIET)
674 qc->flags |= ATA_QCFLAG_QUIET;
679 set_host_byte(cmd, DID_OK);
680 set_status_byte(cmd, SAM_STAT_TASK_SET_FULL);
685 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
687 struct scsi_cmnd *scmd = qc->scsicmd;
689 qc->extrabytes = scmd->extra_len;
690 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
694 * ata_dump_status - user friendly display of error info
695 * @ap: the port in question
696 * @tf: ptr to filled out taskfile
698 * Decode and dump the ATA error/status registers for the user so
699 * that they have some idea what really happened at the non
700 * make-believe layer.
703 * inherited from caller
705 static void ata_dump_status(struct ata_port *ap, struct ata_taskfile *tf)
707 u8 stat = tf->status, err = tf->error;
709 if (stat & ATA_BUSY) {
710 ata_port_warn(ap, "status=0x%02x {Busy} ", stat);
712 ata_port_warn(ap, "status=0x%02x { %s%s%s%s%s%s%s} ", stat,
713 stat & ATA_DRDY ? "DriveReady " : "",
714 stat & ATA_DF ? "DeviceFault " : "",
715 stat & ATA_DSC ? "SeekComplete " : "",
716 stat & ATA_DRQ ? "DataRequest " : "",
717 stat & ATA_CORR ? "CorrectedError " : "",
718 stat & ATA_SENSE ? "Sense " : "",
719 stat & ATA_ERR ? "Error " : "");
721 ata_port_warn(ap, "error=0x%02x {%s%s%s%s%s%s", err,
723 "DriveStatusError " : "",
726 "BadCRC " : "Sector ") : "",
727 err & ATA_UNC ? "UncorrectableError " : "",
728 err & ATA_IDNF ? "SectorIdNotFound " : "",
729 err & ATA_TRK0NF ? "TrackZeroNotFound " : "",
730 err & ATA_AMNF ? "AddrMarkNotFound " : "");
735 * ata_to_sense_error - convert ATA error to SCSI error
736 * @id: ATA device number
737 * @drv_stat: value contained in ATA status register
738 * @drv_err: value contained in ATA error register
739 * @sk: the sense key we'll fill out
740 * @asc: the additional sense code we'll fill out
741 * @ascq: the additional sense code qualifier we'll fill out
742 * @verbose: be verbose
744 * Converts an ATA error into a SCSI error. Fill out pointers to
745 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
746 * format sense blocks.
749 * spin_lock_irqsave(host lock)
751 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
752 u8 *asc, u8 *ascq, int verbose)
756 /* Based on the 3ware driver translation table */
757 static const unsigned char sense_table[][4] = {
759 {0xd1, ABORTED_COMMAND, 0x00, 0x00},
760 // Device busy Aborted command
762 {0xd0, ABORTED_COMMAND, 0x00, 0x00},
763 // Device busy Aborted command
765 {0x61, HARDWARE_ERROR, 0x00, 0x00},
766 // Device fault Hardware error
767 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
768 {0x84, ABORTED_COMMAND, 0x47, 0x00},
769 // Data CRC error SCSI parity error
770 /* MC|ID|ABRT|TRK0|MARK */
771 {0x37, NOT_READY, 0x04, 0x00},
772 // Unit offline Not ready
774 {0x09, NOT_READY, 0x04, 0x00},
775 // Unrecovered disk error Not ready
776 /* Bad address mark */
777 {0x01, MEDIUM_ERROR, 0x13, 0x00},
778 // Address mark not found for data field
779 /* TRK0 - Track 0 not found */
780 {0x02, HARDWARE_ERROR, 0x00, 0x00},
782 /* Abort: 0x04 is not translated here, see below */
783 /* Media change request */
784 {0x08, NOT_READY, 0x04, 0x00},
785 // FIXME: faking offline
786 /* SRV/IDNF - ID not found */
787 {0x10, ILLEGAL_REQUEST, 0x21, 0x00},
788 // Logical address out of range
789 /* MC - Media Changed */
790 {0x20, UNIT_ATTENTION, 0x28, 0x00},
791 // Not ready to ready change, medium may have changed
792 /* ECC - Uncorrectable ECC error */
793 {0x40, MEDIUM_ERROR, 0x11, 0x04},
794 // Unrecovered read error
795 /* BBD - block marked bad */
796 {0x80, MEDIUM_ERROR, 0x11, 0x04},
797 // Block marked bad Medium error, unrecovered read error
798 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
800 static const unsigned char stat_table[][4] = {
801 /* Must be first because BUSY means no other bits valid */
802 {0x80, ABORTED_COMMAND, 0x47, 0x00},
803 // Busy, fake parity for now
804 {0x40, ILLEGAL_REQUEST, 0x21, 0x04},
805 // Device ready, unaligned write command
806 {0x20, HARDWARE_ERROR, 0x44, 0x00},
807 // Device fault, internal target failure
808 {0x08, ABORTED_COMMAND, 0x47, 0x00},
809 // Timed out in xfer, fake parity for now
810 {0x04, RECOVERED_ERROR, 0x11, 0x00},
811 // Recovered ECC error Medium error, recovered
812 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
816 * Is this an error we can process/parse
818 if (drv_stat & ATA_BUSY) {
819 drv_err = 0; /* Ignore the err bits, they're invalid */
823 /* Look for drv_err */
824 for (i = 0; sense_table[i][0] != 0xFF; i++) {
825 /* Look for best matches first */
826 if ((sense_table[i][0] & drv_err) ==
828 *sk = sense_table[i][1];
829 *asc = sense_table[i][2];
830 *ascq = sense_table[i][3];
837 * Fall back to interpreting status bits. Note that if the drv_err
838 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
839 * is not descriptive enough.
841 for (i = 0; stat_table[i][0] != 0xFF; i++) {
842 if (stat_table[i][0] & drv_stat) {
843 *sk = stat_table[i][1];
844 *asc = stat_table[i][2];
845 *ascq = stat_table[i][3];
851 * We need a sensible error return here, which is tricky, and one
852 * that won't cause people to do things like return a disk wrongly.
854 *sk = ABORTED_COMMAND;
860 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
861 id, drv_stat, drv_err, *sk, *asc, *ascq);
866 * ata_gen_passthru_sense - Generate check condition sense block.
867 * @qc: Command that completed.
869 * This function is specific to the ATA descriptor format sense
870 * block specified for the ATA pass through commands. Regardless
871 * of whether the command errored or not, return a sense
872 * block. Copy all controller registers into the sense
873 * block. If there was no error, we get the request from an ATA
874 * passthrough command, so we use the following sense data:
875 * sk = RECOVERED ERROR
876 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
882 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
884 struct scsi_cmnd *cmd = qc->scsicmd;
885 struct ata_taskfile *tf = &qc->result_tf;
886 unsigned char *sb = cmd->sense_buffer;
887 unsigned char *desc = sb + 8;
888 int verbose = qc->ap->ops->error_handler == NULL;
889 u8 sense_key, asc, ascq;
891 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
894 * Use ata_to_sense_error() to map status register bits
895 * onto sense key, asc & ascq.
898 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
899 ata_to_sense_error(qc->ap->print_id, tf->status, tf->error,
900 &sense_key, &asc, &ascq, verbose);
901 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq);
904 * ATA PASS-THROUGH INFORMATION AVAILABLE
905 * Always in descriptor format sense.
907 scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D);
910 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) {
913 /* descriptor format */
915 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9);
917 if (SCSI_SENSE_BUFFERSIZE < len + 14)
925 * Copy registers into sense buffer.
933 desc[12] = tf->device;
934 desc[13] = tf->status;
937 * Fill in Extend bit, and the high order bytes
940 if (tf->flags & ATA_TFLAG_LBA48) {
942 desc[4] = tf->hob_nsect;
943 desc[6] = tf->hob_lbal;
944 desc[8] = tf->hob_lbam;
945 desc[10] = tf->hob_lbah;
948 /* Fixed sense format */
950 desc[1] = tf->status;
951 desc[2] = tf->device;
954 if (tf->flags & ATA_TFLAG_LBA48) {
958 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah)
968 * ata_gen_ata_sense - generate a SCSI fixed sense block
969 * @qc: Command that we are erroring out
971 * Generate sense block for a failed ATA command @qc. Descriptor
972 * format is used to accommodate LBA48 block address.
977 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
979 struct ata_device *dev = qc->dev;
980 struct scsi_cmnd *cmd = qc->scsicmd;
981 struct ata_taskfile *tf = &qc->result_tf;
982 unsigned char *sb = cmd->sense_buffer;
983 int verbose = qc->ap->ops->error_handler == NULL;
985 u8 sense_key, asc, ascq;
987 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
989 if (ata_dev_disabled(dev)) {
990 /* Device disabled after error recovery */
991 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
992 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21);
995 /* Use ata_to_sense_error() to map status register bits
996 * onto sense key, asc & ascq.
999 tf->status & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1000 ata_to_sense_error(qc->ap->print_id, tf->status, tf->error,
1001 &sense_key, &asc, &ascq, verbose);
1002 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq);
1004 /* Could not decode error */
1005 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n",
1006 tf->status, qc->err_mask);
1007 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0);
1011 block = ata_tf_read_block(&qc->result_tf, dev);
1012 if (block == U64_MAX)
1015 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block);
1018 void ata_scsi_sdev_config(struct scsi_device *sdev)
1020 sdev->use_10_for_rw = 1;
1021 sdev->use_10_for_ms = 1;
1022 sdev->no_write_same = 1;
1024 /* Schedule policy is determined by ->qc_defer() callback and
1025 * it needs to see every deferred qc. Set dev_blocked to 1 to
1026 * prevent SCSI midlayer from automatically deferring
1029 sdev->max_device_blocked = 1;
1033 * ata_scsi_dma_need_drain - Check whether data transfer may overflow
1034 * @rq: request to be checked
1036 * ATAPI commands which transfer variable length data to host
1037 * might overflow due to application error or hardware bug. This
1038 * function checks whether overflow should be drained and ignored
1045 * 1 if ; otherwise, 0.
1047 bool ata_scsi_dma_need_drain(struct request *rq)
1049 struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq);
1051 return atapi_cmd_type(scmd->cmnd[0]) == ATAPI_MISC;
1053 EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain);
1055 int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev)
1057 struct request_queue *q = sdev->request_queue;
1059 if (!ata_id_has_unload(dev->id))
1060 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1062 /* configure max sectors */
1063 blk_queue_max_hw_sectors(q, dev->max_sectors);
1065 if (dev->class == ATA_DEV_ATAPI) {
1066 sdev->sector_size = ATA_SECT_SIZE;
1068 /* set DMA padding */
1069 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1071 /* make room for appending the drain */
1072 blk_queue_max_segments(q, queue_max_segments(q) - 1);
1074 sdev->dma_drain_len = ATAPI_MAX_DRAIN;
1075 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, GFP_NOIO);
1076 if (!sdev->dma_drain_buf) {
1077 ata_dev_err(dev, "drain buffer allocation failed\n");
1081 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1082 sdev->manage_start_stop = 1;
1086 * ata_pio_sectors() expects buffer for each sector to not cross
1087 * page boundary. Enforce it by requiring buffers to be sector
1088 * aligned, which works iff sector_size is not larger than
1089 * PAGE_SIZE. ATAPI devices also need the alignment as
1090 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1092 if (sdev->sector_size > PAGE_SIZE)
1094 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1097 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1099 if (dev->flags & ATA_DFLAG_AN)
1100 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1102 if (dev->flags & ATA_DFLAG_NCQ) {
1105 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1106 depth = min(ATA_MAX_QUEUE, depth);
1107 scsi_change_queue_depth(sdev, depth);
1110 if (dev->flags & ATA_DFLAG_TRUSTED)
1111 sdev->security_supported = 1;
1118 * ata_scsi_slave_config - Set SCSI device attributes
1119 * @sdev: SCSI device to examine
1121 * This is called before we actually start reading
1122 * and writing to the device, to configure certain
1123 * SCSI mid-layer behaviors.
1126 * Defined by SCSI layer. We don't really care.
1129 int ata_scsi_slave_config(struct scsi_device *sdev)
1131 struct ata_port *ap = ata_shost_to_port(sdev->host);
1132 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1135 ata_scsi_sdev_config(sdev);
1138 rc = ata_scsi_dev_config(sdev, dev);
1142 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
1145 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1146 * @sdev: SCSI device to be destroyed
1148 * @sdev is about to be destroyed for hot/warm unplugging. If
1149 * this unplugging was initiated by libata as indicated by NULL
1150 * dev->sdev, this function doesn't have to do anything.
1151 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1152 * Clear dev->sdev, schedule the device for ATA detach and invoke
1156 * Defined by SCSI layer. We don't really care.
1158 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1160 struct ata_port *ap = ata_shost_to_port(sdev->host);
1161 unsigned long flags;
1162 struct ata_device *dev;
1164 if (!ap->ops->error_handler)
1167 spin_lock_irqsave(ap->lock, flags);
1168 dev = __ata_scsi_find_dev(ap, sdev);
1169 if (dev && dev->sdev) {
1170 /* SCSI device already in CANCEL state, no need to offline it */
1172 dev->flags |= ATA_DFLAG_DETACH;
1173 ata_port_schedule_eh(ap);
1175 spin_unlock_irqrestore(ap->lock, flags);
1177 kfree(sdev->dma_drain_buf);
1179 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
1182 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1183 * @qc: Storage for translated ATA taskfile
1185 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1186 * (to start). Perhaps these commands should be preceded by
1187 * CHECK POWER MODE to see what power mode the device is already in.
1188 * [See SAT revision 5 at www.t10.org]
1191 * spin_lock_irqsave(host lock)
1194 * Zero on success, non-zero on error.
1196 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1198 struct scsi_cmnd *scmd = qc->scsicmd;
1199 struct ata_taskfile *tf = &qc->tf;
1200 const u8 *cdb = scmd->cmnd;
1204 if (scmd->cmd_len < 5) {
1209 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1210 tf->protocol = ATA_PROT_NODATA;
1212 ; /* ignore IMMED bit, violates sat-r05 */
1217 goto invalid_fld; /* LOEJ bit set not supported */
1219 if (((cdb[4] >> 4) & 0xf) != 0) {
1222 goto invalid_fld; /* power conditions not supported */
1226 tf->nsect = 1; /* 1 sector, lba=0 */
1228 if (qc->dev->flags & ATA_DFLAG_LBA) {
1229 tf->flags |= ATA_TFLAG_LBA;
1234 tf->device |= ATA_LBA;
1237 tf->lbal = 0x1; /* sect */
1238 tf->lbam = 0x0; /* cyl low */
1239 tf->lbah = 0x0; /* cyl high */
1242 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1244 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1245 * or S5) causing some drives to spin up and down again.
1247 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1248 system_state == SYSTEM_POWER_OFF)
1251 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1252 system_entering_hibernation())
1255 /* Issue ATA STANDBY IMMEDIATE command */
1256 tf->command = ATA_CMD_STANDBYNOW1;
1260 * Standby and Idle condition timers could be implemented but that
1261 * would require libata to implement the Power condition mode page
1262 * and allow the user to change it. Changing mode pages requires
1263 * MODE SELECT to be implemented.
1269 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
1272 scmd->result = SAM_STAT_GOOD;
1278 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1279 * @qc: Storage for translated ATA taskfile
1281 * Sets up an ATA taskfile to issue FLUSH CACHE or
1285 * spin_lock_irqsave(host lock)
1288 * Zero on success, non-zero on error.
1290 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1292 struct ata_taskfile *tf = &qc->tf;
1294 tf->flags |= ATA_TFLAG_DEVICE;
1295 tf->protocol = ATA_PROT_NODATA;
1297 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1298 tf->command = ATA_CMD_FLUSH_EXT;
1300 tf->command = ATA_CMD_FLUSH;
1302 /* flush is critical for IO integrity, consider it an IO command */
1303 qc->flags |= ATA_QCFLAG_IO;
1309 * scsi_6_lba_len - Get LBA and transfer length
1310 * @cdb: SCSI command to translate
1312 * Calculate LBA and transfer length for 6-byte commands.
1316 * @plen: the transfer length
1318 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1323 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1324 lba |= ((u64)cdb[2]) << 8;
1325 lba |= ((u64)cdb[3]);
1334 * scsi_10_lba_len - Get LBA and transfer length
1335 * @cdb: SCSI command to translate
1337 * Calculate LBA and transfer length for 10-byte commands.
1341 * @plen: the transfer length
1343 static inline void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1345 *plba = get_unaligned_be32(&cdb[2]);
1346 *plen = get_unaligned_be16(&cdb[7]);
1350 * scsi_16_lba_len - Get LBA and transfer length
1351 * @cdb: SCSI command to translate
1353 * Calculate LBA and transfer length for 16-byte commands.
1357 * @plen: the transfer length
1359 static inline void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1361 *plba = get_unaligned_be64(&cdb[2]);
1362 *plen = get_unaligned_be32(&cdb[10]);
1366 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1367 * @qc: Storage for translated ATA taskfile
1369 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1372 * spin_lock_irqsave(host lock)
1375 * Zero on success, non-zero on error.
1377 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1379 struct scsi_cmnd *scmd = qc->scsicmd;
1380 struct ata_taskfile *tf = &qc->tf;
1381 struct ata_device *dev = qc->dev;
1382 u64 dev_sectors = qc->dev->n_sectors;
1383 const u8 *cdb = scmd->cmnd;
1388 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1389 tf->protocol = ATA_PROT_NODATA;
1393 if (scmd->cmd_len < 10) {
1397 scsi_10_lba_len(cdb, &block, &n_block);
1400 if (scmd->cmd_len < 16) {
1404 scsi_16_lba_len(cdb, &block, &n_block);
1413 if (block >= dev_sectors)
1415 if ((block + n_block) > dev_sectors)
1418 if (dev->flags & ATA_DFLAG_LBA) {
1419 tf->flags |= ATA_TFLAG_LBA;
1421 if (lba_28_ok(block, n_block)) {
1423 tf->command = ATA_CMD_VERIFY;
1424 tf->device |= (block >> 24) & 0xf;
1425 } else if (lba_48_ok(block, n_block)) {
1426 if (!(dev->flags & ATA_DFLAG_LBA48))
1430 tf->flags |= ATA_TFLAG_LBA48;
1431 tf->command = ATA_CMD_VERIFY_EXT;
1433 tf->hob_nsect = (n_block >> 8) & 0xff;
1435 tf->hob_lbah = (block >> 40) & 0xff;
1436 tf->hob_lbam = (block >> 32) & 0xff;
1437 tf->hob_lbal = (block >> 24) & 0xff;
1439 /* request too large even for LBA48 */
1442 tf->nsect = n_block & 0xff;
1444 tf->lbah = (block >> 16) & 0xff;
1445 tf->lbam = (block >> 8) & 0xff;
1446 tf->lbal = block & 0xff;
1448 tf->device |= ATA_LBA;
1451 u32 sect, head, cyl, track;
1453 if (!lba_28_ok(block, n_block))
1456 /* Convert LBA to CHS */
1457 track = (u32)block / dev->sectors;
1458 cyl = track / dev->heads;
1459 head = track % dev->heads;
1460 sect = (u32)block % dev->sectors + 1;
1462 /* Check whether the converted CHS can fit.
1466 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1469 tf->command = ATA_CMD_VERIFY;
1470 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1473 tf->lbah = cyl >> 8;
1480 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1484 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1485 /* "Logical Block Address out of range" */
1489 scmd->result = SAM_STAT_GOOD;
1493 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks)
1495 struct request *rq = scsi_cmd_to_rq(scmd);
1498 if (!blk_rq_is_passthrough(rq))
1501 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size;
1502 if (n_blocks > req_blocks)
1509 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1510 * @qc: Storage for translated ATA taskfile
1512 * Converts any of six SCSI read/write commands into the
1513 * ATA counterpart, including starting sector (LBA),
1514 * sector count, and taking into account the device's LBA48
1517 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1518 * %WRITE_16 are currently supported.
1521 * spin_lock_irqsave(host lock)
1524 * Zero on success, non-zero on error.
1526 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1528 struct scsi_cmnd *scmd = qc->scsicmd;
1529 const u8 *cdb = scmd->cmnd;
1530 struct request *rq = scsi_cmd_to_rq(scmd);
1531 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
1532 unsigned int tf_flags = 0;
1542 tf_flags |= ATA_TFLAG_WRITE;
1546 /* Calculate the SCSI LBA, transfer length and FUA. */
1550 if (unlikely(scmd->cmd_len < 10)) {
1554 scsi_10_lba_len(cdb, &block, &n_block);
1555 if (cdb[1] & (1 << 3))
1556 tf_flags |= ATA_TFLAG_FUA;
1557 if (!ata_check_nblocks(scmd, n_block))
1562 if (unlikely(scmd->cmd_len < 6)) {
1566 scsi_6_lba_len(cdb, &block, &n_block);
1568 /* for 6-byte r/w commands, transfer length 0
1569 * means 256 blocks of data, not 0 block.
1573 if (!ata_check_nblocks(scmd, n_block))
1578 if (unlikely(scmd->cmd_len < 16)) {
1582 scsi_16_lba_len(cdb, &block, &n_block);
1583 if (cdb[1] & (1 << 3))
1584 tf_flags |= ATA_TFLAG_FUA;
1585 if (!ata_check_nblocks(scmd, n_block))
1593 /* Check and compose ATA command */
1595 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1596 * length 0 means transfer 0 block of data.
1597 * However, for ATA R/W commands, sector count 0 means
1598 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1600 * WARNING: one or two older ATA drives treat 0 as 0...
1604 qc->flags |= ATA_QCFLAG_IO;
1605 qc->nbytes = n_block * scmd->device->sector_size;
1607 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1610 if (likely(rc == 0))
1615 /* treat all other errors as -EINVAL, fall through */
1617 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1621 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1622 /* "Logical Block Address out of range" */
1626 scmd->result = SAM_STAT_GOOD;
1630 static void ata_qc_done(struct ata_queued_cmd *qc)
1632 struct scsi_cmnd *cmd = qc->scsicmd;
1633 void (*done)(struct scsi_cmnd *) = qc->scsidone;
1639 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1641 struct ata_port *ap = qc->ap;
1642 struct scsi_cmnd *cmd = qc->scsicmd;
1643 u8 *cdb = cmd->cmnd;
1644 int need_sense = (qc->err_mask != 0);
1646 /* For ATA pass thru (SAT) commands, generate a sense block if
1647 * user mandated it or if there's an error. Note that if we
1648 * generate because the user forced us to [CK_COND =1], a check
1649 * condition is generated and the ATA register values are returned
1650 * whether the command completed successfully or not. If there
1651 * was no error, we use the following sense data:
1652 * sk = RECOVERED ERROR
1653 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1655 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1656 ((cdb[2] & 0x20) || need_sense))
1657 ata_gen_passthru_sense(qc);
1658 else if (qc->flags & ATA_QCFLAG_SENSE_VALID)
1659 cmd->result = SAM_STAT_CHECK_CONDITION;
1660 else if (need_sense)
1661 ata_gen_ata_sense(qc);
1663 cmd->result = SAM_STAT_GOOD;
1665 if (need_sense && !ap->ops->error_handler)
1666 ata_dump_status(ap, &qc->result_tf);
1672 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1673 * @dev: ATA device to which the command is addressed
1674 * @cmd: SCSI command to execute
1675 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1677 * Our ->queuecommand() function has decided that the SCSI
1678 * command issued can be directly translated into an ATA
1679 * command, rather than handled internally.
1681 * This function sets up an ata_queued_cmd structure for the
1682 * SCSI command, and sends that ata_queued_cmd to the hardware.
1684 * The xlat_func argument (actor) returns 0 if ready to execute
1685 * ATA command, else 1 to finish translation. If 1 is returned
1686 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1687 * to be set reflecting an error condition or clean (early)
1691 * spin_lock_irqsave(host lock)
1694 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1695 * needs to be deferred.
1697 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1698 ata_xlat_func_t xlat_func)
1700 struct ata_port *ap = dev->link->ap;
1701 struct ata_queued_cmd *qc;
1704 qc = ata_scsi_qc_new(dev, cmd);
1708 /* data is present; dma-map it */
1709 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1710 cmd->sc_data_direction == DMA_TO_DEVICE) {
1711 if (unlikely(scsi_bufflen(cmd) < 1)) {
1712 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
1716 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1718 qc->dma_dir = cmd->sc_data_direction;
1721 qc->complete_fn = ata_scsi_qc_complete;
1726 if (ap->ops->qc_defer) {
1727 if ((rc = ap->ops->qc_defer(qc)))
1731 /* select device, send command to hardware */
1743 cmd->result = (DID_ERROR << 16);
1750 if (rc == ATA_DEFER_LINK)
1751 return SCSI_MLQUEUE_DEVICE_BUSY;
1753 return SCSI_MLQUEUE_HOST_BUSY;
1756 struct ata_scsi_args {
1757 struct ata_device *dev;
1759 struct scsi_cmnd *cmd;
1763 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1764 * @args: device IDENTIFY data / SCSI command of interest.
1765 * @actor: Callback hook for desired SCSI command simulator
1767 * Takes care of the hard work of simulating a SCSI command...
1768 * Mapping the response buffer, calling the command's handler,
1769 * and handling the handler's return value. This return value
1770 * indicates whether the handler wishes the SCSI command to be
1771 * completed successfully (0), or not (in which case cmd->result
1772 * and sense buffer are assumed to be set).
1775 * spin_lock_irqsave(host lock)
1777 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1778 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1781 struct scsi_cmnd *cmd = args->cmd;
1782 unsigned long flags;
1784 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
1786 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1787 rc = actor(args, ata_scsi_rbuf);
1789 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1790 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1792 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
1795 cmd->result = SAM_STAT_GOOD;
1799 * ata_scsiop_inq_std - Simulate INQUIRY command
1800 * @args: device IDENTIFY data / SCSI command of interest.
1801 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1803 * Returns standard device identification data associated
1804 * with non-VPD INQUIRY command output.
1807 * spin_lock_irqsave(host lock)
1809 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1811 static const u8 versions[] = {
1813 0x60, /* SAM-3 (no version claimed) */
1816 0x20, /* SBC-2 (no version claimed) */
1819 0x00 /* SPC-3 (no version claimed) */
1821 static const u8 versions_zbc[] = {
1823 0xA0, /* SAM-5 (no version claimed) */
1826 0x00, /* SBC-4 (no version claimed) */
1829 0xC0, /* SPC-5 (no version claimed) */
1838 0x5, /* claim SPC-3 version compatibility */
1846 /* set scsi removable (RMB) bit per ata bit, or if the
1847 * AHCI port says it's external (Hotplug-capable, eSATA).
1849 if (ata_id_removable(args->id) ||
1850 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL))
1853 if (args->dev->class == ATA_DEV_ZAC) {
1855 hdr[2] = 0x7; /* claim SPC-5 version compatibility */
1858 memcpy(rbuf, hdr, sizeof(hdr));
1859 memcpy(&rbuf[8], "ATA ", 8);
1860 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1862 /* From SAT, use last 2 words from fw rev unless they are spaces */
1863 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
1864 if (strncmp(&rbuf[32], " ", 4) == 0)
1865 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1867 if (rbuf[32] == 0 || rbuf[32] == ' ')
1868 memcpy(&rbuf[32], "n/a ", 4);
1870 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC)
1871 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc));
1873 memcpy(rbuf + 58, versions, sizeof(versions));
1879 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1880 * @args: device IDENTIFY data / SCSI command of interest.
1881 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1883 * Returns list of inquiry VPD pages available.
1886 * spin_lock_irqsave(host lock)
1888 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1890 int i, num_pages = 0;
1891 static const u8 pages[] = {
1892 0x00, /* page 0x00, this page */
1893 0x80, /* page 0x80, unit serial no page */
1894 0x83, /* page 0x83, device ident page */
1895 0x89, /* page 0x89, ata info page */
1896 0xb0, /* page 0xb0, block limits page */
1897 0xb1, /* page 0xb1, block device characteristics page */
1898 0xb2, /* page 0xb2, thin provisioning page */
1899 0xb6, /* page 0xb6, zoned block device characteristics */
1900 0xb9, /* page 0xb9, concurrent positioning ranges */
1903 for (i = 0; i < sizeof(pages); i++) {
1904 if (pages[i] == 0xb6 &&
1905 !(args->dev->flags & ATA_DFLAG_ZAC))
1907 rbuf[num_pages + 4] = pages[i];
1910 rbuf[3] = num_pages; /* number of supported VPD pages */
1915 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1916 * @args: device IDENTIFY data / SCSI command of interest.
1917 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1919 * Returns ATA device serial number.
1922 * spin_lock_irqsave(host lock)
1924 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
1926 static const u8 hdr[] = {
1928 0x80, /* this page code */
1930 ATA_ID_SERNO_LEN, /* page len */
1933 memcpy(rbuf, hdr, sizeof(hdr));
1934 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1935 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1940 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1941 * @args: device IDENTIFY data / SCSI command of interest.
1942 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1944 * Yields two logical unit device identification designators:
1945 * - vendor specific ASCII containing the ATA serial number
1946 * - SAT defined "t10 vendor id based" containing ASCII vendor
1947 * name ("ATA "), model and serial numbers.
1950 * spin_lock_irqsave(host lock)
1952 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
1954 const int sat_model_serial_desc_len = 68;
1957 rbuf[1] = 0x83; /* this page code */
1960 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1962 rbuf[num + 3] = ATA_ID_SERNO_LEN;
1964 ata_id_string(args->id, (unsigned char *) rbuf + num,
1965 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1966 num += ATA_ID_SERNO_LEN;
1968 /* SAT defined lu model and serial numbers descriptor */
1969 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1972 rbuf[num + 3] = sat_model_serial_desc_len;
1974 memcpy(rbuf + num, "ATA ", 8);
1976 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
1978 num += ATA_ID_PROD_LEN;
1979 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
1981 num += ATA_ID_SERNO_LEN;
1983 if (ata_id_has_wwn(args->id)) {
1984 /* SAT defined lu world wide name */
1985 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
1988 rbuf[num + 3] = ATA_ID_WWN_LEN;
1990 ata_id_string(args->id, (unsigned char *) rbuf + num,
1991 ATA_ID_WWN, ATA_ID_WWN_LEN);
1992 num += ATA_ID_WWN_LEN;
1994 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1999 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2000 * @args: device IDENTIFY data / SCSI command of interest.
2001 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2003 * Yields SAT-specified ATA VPD page.
2006 * spin_lock_irqsave(host lock)
2008 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2010 rbuf[1] = 0x89; /* our page code */
2011 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2012 rbuf[3] = (0x238 & 0xff);
2014 memcpy(&rbuf[8], "linux ", 8);
2015 memcpy(&rbuf[16], "libata ", 16);
2016 memcpy(&rbuf[32], DRV_VERSION, 4);
2018 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2019 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */
2022 /* we don't store the ATA device signature, so we fake it */
2023 rbuf[38] = ATA_DRDY; /* really, this is Status reg */
2027 rbuf[56] = ATA_CMD_ID_ATA;
2029 memcpy(&rbuf[60], &args->id[0], 512);
2033 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2035 struct ata_device *dev = args->dev;
2039 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2042 * Optimal transfer length granularity.
2044 * This is always one physical block, but for disks with a smaller
2045 * logical than physical sector size we need to figure out what the
2048 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2049 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2052 * Optimal unmap granularity.
2054 * The ATA spec doesn't even know about a granularity or alignment
2055 * for the TRIM command. We can leave away most of the unmap related
2056 * VPD page entries, but we have specifify a granularity to signal
2057 * that we support some form of unmap - in thise case via WRITE SAME
2058 * with the unmap bit set.
2060 if (ata_id_has_trim(args->id)) {
2061 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM;
2063 if (dev->horkage & ATA_HORKAGE_MAX_TRIM_128M)
2064 max_blocks = 128 << (20 - SECTOR_SHIFT);
2066 put_unaligned_be64(max_blocks, &rbuf[36]);
2067 put_unaligned_be32(1, &rbuf[28]);
2073 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2075 int form_factor = ata_id_form_factor(args->id);
2076 int media_rotation_rate = ata_id_rotation_rate(args->id);
2077 u8 zoned = ata_id_zoned_cap(args->id);
2081 rbuf[4] = media_rotation_rate >> 8;
2082 rbuf[5] = media_rotation_rate;
2083 rbuf[7] = form_factor;
2085 rbuf[8] = (zoned << 4);
2090 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2092 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2095 rbuf[5] = 1 << 6; /* TPWS */
2100 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf)
2103 * zbc-r05 SCSI Zoned Block device characteristics VPD page
2109 * URSWRZ bit is only meaningful for host-managed ZAC drives
2111 if (args->dev->zac_zoned_cap & 1)
2113 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]);
2114 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]);
2115 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]);
2120 static unsigned int ata_scsiop_inq_b9(struct ata_scsi_args *args, u8 *rbuf)
2122 struct ata_cpr_log *cpr_log = args->dev->cpr_log;
2123 u8 *desc = &rbuf[64];
2126 /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */
2128 put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[2]);
2130 for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) {
2131 desc[0] = cpr_log->cpr[i].num;
2132 desc[1] = cpr_log->cpr[i].num_storage_elements;
2133 put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]);
2134 put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]);
2141 * modecpy - Prepare response for MODE SENSE
2142 * @dest: output buffer
2143 * @src: data being copied
2144 * @n: length of mode page
2145 * @changeable: whether changeable parameters are requested
2147 * Generate a generic MODE SENSE page for either current or changeable
2153 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2156 memcpy(dest, src, 2);
2157 memset(dest + 2, 0, n - 2);
2159 memcpy(dest, src, n);
2164 * ata_msense_caching - Simulate MODE SENSE caching info page
2165 * @id: device IDENTIFY data
2166 * @buf: output buffer
2167 * @changeable: whether changeable parameters are requested
2169 * Generate a caching info page, which conditionally indicates
2170 * write caching to the SCSI layer, depending on device
2176 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2178 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2180 buf[2] |= (1 << 2); /* ata_mselect_caching() */
2182 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */
2183 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */
2185 return sizeof(def_cache_mpage);
2189 * ata_msense_control - Simulate MODE SENSE control mode page
2190 * @dev: ATA device of interest
2191 * @buf: output buffer
2192 * @changeable: whether changeable parameters are requested
2194 * Generate a generic MODE SENSE control mode page.
2199 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf,
2202 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2204 buf[2] |= (1 << 2); /* ata_mselect_control() */
2206 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
2208 buf[2] |= (d_sense << 2); /* descriptor format sense data */
2210 return sizeof(def_control_mpage);
2214 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2215 * @buf: output buffer
2216 * @changeable: whether changeable parameters are requested
2218 * Generate a generic MODE SENSE r/w error recovery page.
2223 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2225 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2227 return sizeof(def_rw_recovery_mpage);
2231 * We can turn this into a real blacklist if it's needed, for now just
2232 * blacklist any Maxtor BANC1G10 revision firmware
2234 static int ata_dev_supports_fua(u16 *id)
2236 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2240 if (!ata_id_has_fua(id))
2243 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2244 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2246 if (strcmp(model, "Maxtor"))
2248 if (strcmp(fw, "BANC1G10"))
2251 return 0; /* blacklisted */
2255 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2256 * @args: device IDENTIFY data / SCSI command of interest.
2257 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2259 * Simulate MODE SENSE commands. Assume this is invoked for direct
2260 * access devices (e.g. disks) only. There should be no block
2261 * descriptor for other device types.
2264 * spin_lock_irqsave(host lock)
2266 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2268 struct ata_device *dev = args->dev;
2269 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2270 static const u8 sat_blk_desc[] = {
2271 0, 0, 0, 0, /* number of blocks: sat unspecified */
2273 0, 0x2, 0x0 /* block length: 512 bytes */
2276 unsigned int ebd, page_control, six_byte;
2277 u8 dpofua, bp = 0xff;
2280 six_byte = (scsicmd[0] == MODE_SENSE);
2281 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2283 * LLBA bit in msense(10) ignored (compliant)
2286 page_control = scsicmd[2] >> 6;
2287 switch (page_control) {
2288 case 0: /* current */
2289 case 1: /* changeable */
2290 case 2: /* defaults */
2291 break; /* supported */
2293 goto saving_not_supp;
2301 p += 4 + (ebd ? 8 : 0);
2303 p += 8 + (ebd ? 8 : 0);
2305 pg = scsicmd[2] & 0x3f;
2308 * No mode subpages supported (yet) but asking for _all_
2309 * subpages may be valid
2311 if (spg && (spg != ALL_SUB_MPAGES)) {
2317 case RW_RECOVERY_MPAGE:
2318 p += ata_msense_rw_recovery(p, page_control == 1);
2322 p += ata_msense_caching(args->id, p, page_control == 1);
2326 p += ata_msense_control(args->dev, p, page_control == 1);
2330 p += ata_msense_rw_recovery(p, page_control == 1);
2331 p += ata_msense_caching(args->id, p, page_control == 1);
2332 p += ata_msense_control(args->dev, p, page_control == 1);
2335 default: /* invalid page code */
2341 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2342 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2346 rbuf[0] = p - rbuf - 1;
2349 rbuf[3] = sizeof(sat_blk_desc);
2350 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2353 unsigned int output_len = p - rbuf - 2;
2355 rbuf[0] = output_len >> 8;
2356 rbuf[1] = output_len;
2359 rbuf[7] = sizeof(sat_blk_desc);
2360 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2366 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp);
2370 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2371 /* "Saving parameters not supported" */
2376 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2377 * @args: device IDENTIFY data / SCSI command of interest.
2378 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2380 * Simulate READ CAPACITY commands.
2385 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2387 struct ata_device *dev = args->dev;
2388 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2389 u32 sector_size; /* physical sector size in bytes */
2393 sector_size = ata_id_logical_sector_size(dev->id);
2394 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2395 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2397 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2398 if (last_lba >= 0xffffffffULL)
2399 last_lba = 0xffffffff;
2401 /* sector count, 32-bit */
2402 rbuf[0] = last_lba >> (8 * 3);
2403 rbuf[1] = last_lba >> (8 * 2);
2404 rbuf[2] = last_lba >> (8 * 1);
2408 rbuf[4] = sector_size >> (8 * 3);
2409 rbuf[5] = sector_size >> (8 * 2);
2410 rbuf[6] = sector_size >> (8 * 1);
2411 rbuf[7] = sector_size;
2413 /* sector count, 64-bit */
2414 rbuf[0] = last_lba >> (8 * 7);
2415 rbuf[1] = last_lba >> (8 * 6);
2416 rbuf[2] = last_lba >> (8 * 5);
2417 rbuf[3] = last_lba >> (8 * 4);
2418 rbuf[4] = last_lba >> (8 * 3);
2419 rbuf[5] = last_lba >> (8 * 2);
2420 rbuf[6] = last_lba >> (8 * 1);
2424 rbuf[ 8] = sector_size >> (8 * 3);
2425 rbuf[ 9] = sector_size >> (8 * 2);
2426 rbuf[10] = sector_size >> (8 * 1);
2427 rbuf[11] = sector_size;
2430 rbuf[13] = log2_per_phys;
2431 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2432 rbuf[15] = lowest_aligned;
2434 if (ata_id_has_trim(args->id) &&
2435 !(dev->horkage & ATA_HORKAGE_NOTRIM)) {
2436 rbuf[14] |= 0x80; /* LBPME */
2438 if (ata_id_has_zero_after_trim(args->id) &&
2439 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) {
2440 ata_dev_info(dev, "Enabling discard_zeroes_data\n");
2441 rbuf[14] |= 0x40; /* LBPRZ */
2444 if (ata_id_zoned_cap(args->id) ||
2445 args->dev->class == ATA_DEV_ZAC)
2446 rbuf[12] = (1 << 4); /* RC_BASIS */
2452 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2453 * @args: device IDENTIFY data / SCSI command of interest.
2454 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2456 * Simulate REPORT LUNS command.
2459 * spin_lock_irqsave(host lock)
2461 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2463 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2468 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2470 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2471 /* FIXME: not quite right; we don't want the
2472 * translation of taskfile registers into
2473 * a sense descriptors, since that's only
2474 * correct for ATA, not ATAPI
2476 ata_gen_passthru_sense(qc);
2482 /* is it pointless to prefer PIO for "safety reasons"? */
2483 static inline int ata_pio_use_silly(struct ata_port *ap)
2485 return (ap->flags & ATA_FLAG_PIO_DMA);
2488 static void atapi_request_sense(struct ata_queued_cmd *qc)
2490 struct ata_port *ap = qc->ap;
2491 struct scsi_cmnd *cmd = qc->scsicmd;
2493 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2495 #ifdef CONFIG_ATA_SFF
2496 if (ap->ops->sff_tf_read)
2497 ap->ops->sff_tf_read(ap, &qc->tf);
2500 /* fill these in, for the case where they are -not- overwritten */
2501 cmd->sense_buffer[0] = 0x70;
2502 cmd->sense_buffer[2] = qc->tf.error >> 4;
2506 /* setup sg table and init transfer direction */
2507 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2508 ata_sg_init(qc, &qc->sgent, 1);
2509 qc->dma_dir = DMA_FROM_DEVICE;
2511 memset(&qc->cdb, 0, qc->dev->cdb_len);
2512 qc->cdb[0] = REQUEST_SENSE;
2513 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2515 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2516 qc->tf.command = ATA_CMD_PACKET;
2518 if (ata_pio_use_silly(ap)) {
2519 qc->tf.protocol = ATAPI_PROT_DMA;
2520 qc->tf.feature |= ATAPI_PKT_DMA;
2522 qc->tf.protocol = ATAPI_PROT_PIO;
2523 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2526 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2528 qc->complete_fn = atapi_sense_complete;
2534 * ATAPI devices typically report zero for their SCSI version, and sometimes
2535 * deviate from the spec WRT response data format. If SCSI version is
2536 * reported as zero like normal, then we make the following fixups:
2537 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a
2539 * 2) Ensure response data format / ATAPI information are always correct.
2541 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd)
2545 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2550 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2553 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2555 struct scsi_cmnd *cmd = qc->scsicmd;
2556 unsigned int err_mask = qc->err_mask;
2558 /* handle completion from new EH */
2559 if (unlikely(qc->ap->ops->error_handler &&
2560 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2562 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2563 /* FIXME: not quite right; we don't want the
2564 * translation of taskfile registers into a
2565 * sense descriptors, since that's only
2566 * correct for ATA, not ATAPI
2568 ata_gen_passthru_sense(qc);
2571 /* SCSI EH automatically locks door if sdev->locked is
2572 * set. Sometimes door lock request continues to
2573 * fail, for example, when no media is present. This
2574 * creates a loop - SCSI EH issues door lock which
2575 * fails and gets invoked again to acquire sense data
2576 * for the failed command.
2578 * If door lock fails, always clear sdev->locked to
2579 * avoid this infinite loop.
2581 * This may happen before SCSI scan is complete. Make
2582 * sure qc->dev->sdev isn't NULL before dereferencing.
2584 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2585 qc->dev->sdev->locked = 0;
2587 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2592 /* successful completion or old EH failure path */
2593 if (unlikely(err_mask & AC_ERR_DEV)) {
2594 cmd->result = SAM_STAT_CHECK_CONDITION;
2595 atapi_request_sense(qc);
2597 } else if (unlikely(err_mask)) {
2598 /* FIXME: not quite right; we don't want the
2599 * translation of taskfile registers into
2600 * a sense descriptors, since that's only
2601 * correct for ATA, not ATAPI
2603 ata_gen_passthru_sense(qc);
2605 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0)
2606 atapi_fixup_inquiry(cmd);
2607 cmd->result = SAM_STAT_GOOD;
2613 * atapi_xlat - Initialize PACKET taskfile
2614 * @qc: command structure to be initialized
2617 * spin_lock_irqsave(host lock)
2620 * Zero on success, non-zero on failure.
2622 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2624 struct scsi_cmnd *scmd = qc->scsicmd;
2625 struct ata_device *dev = qc->dev;
2626 int nodata = (scmd->sc_data_direction == DMA_NONE);
2627 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2628 unsigned int nbytes;
2630 memset(qc->cdb, 0, dev->cdb_len);
2631 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2633 qc->complete_fn = atapi_qc_complete;
2635 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2636 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2637 qc->tf.flags |= ATA_TFLAG_WRITE;
2640 qc->tf.command = ATA_CMD_PACKET;
2641 ata_qc_set_pc_nbytes(qc);
2643 /* check whether ATAPI DMA is safe */
2644 if (!nodata && !using_pio && atapi_check_dma(qc))
2647 /* Some controller variants snoop this value for Packet
2648 * transfers to do state machine and FIFO management. Thus we
2649 * want to set it properly, and for DMA where it is
2650 * effectively meaningless.
2652 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2654 /* Most ATAPI devices which honor transfer chunk size don't
2655 * behave according to the spec when odd chunk size which
2656 * matches the transfer length is specified. If the number of
2657 * bytes to transfer is 2n+1. According to the spec, what
2658 * should happen is to indicate that 2n+1 is going to be
2659 * transferred and transfer 2n+2 bytes where the last byte is
2662 * In practice, this doesn't happen. ATAPI devices first
2663 * indicate and transfer 2n bytes and then indicate and
2664 * transfer 2 bytes where the last byte is padding.
2666 * This inconsistency confuses several controllers which
2667 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2668 * These controllers use actual number of transferred bytes to
2669 * update DMA pointer and transfer of 4n+2 bytes make those
2670 * controller push DMA pointer by 4n+4 bytes because SATA data
2671 * FISes are aligned to 4 bytes. This causes data corruption
2672 * and buffer overrun.
2674 * Always setting nbytes to even number solves this problem
2675 * because then ATAPI devices don't have to split data at 2n
2681 qc->tf.lbam = (nbytes & 0xFF);
2682 qc->tf.lbah = (nbytes >> 8);
2685 qc->tf.protocol = ATAPI_PROT_NODATA;
2687 qc->tf.protocol = ATAPI_PROT_PIO;
2690 qc->tf.protocol = ATAPI_PROT_DMA;
2691 qc->tf.feature |= ATAPI_PKT_DMA;
2693 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2694 (scmd->sc_data_direction != DMA_TO_DEVICE))
2695 /* some SATA bridges need us to indicate data xfer direction */
2696 qc->tf.feature |= ATAPI_DMADIR;
2700 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2701 as ATAPI tape drives don't get this right otherwise */
2705 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2707 if (!sata_pmp_attached(ap)) {
2708 if (likely(devno >= 0 &&
2709 devno < ata_link_max_devices(&ap->link)))
2710 return &ap->link.device[devno];
2712 if (likely(devno >= 0 &&
2713 devno < ap->nr_pmp_links))
2714 return &ap->pmp_link[devno].device[0];
2720 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2721 const struct scsi_device *scsidev)
2725 /* skip commands not addressed to targets we simulate */
2726 if (!sata_pmp_attached(ap)) {
2727 if (unlikely(scsidev->channel || scsidev->lun))
2729 devno = scsidev->id;
2731 if (unlikely(scsidev->id || scsidev->lun))
2733 devno = scsidev->channel;
2736 return ata_find_dev(ap, devno);
2740 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2741 * @ap: ATA port to which the device is attached
2742 * @scsidev: SCSI device from which we derive the ATA device
2744 * Given various information provided in struct scsi_cmnd,
2745 * map that onto an ATA bus, and using that mapping
2746 * determine which ata_device is associated with the
2747 * SCSI command to be sent.
2750 * spin_lock_irqsave(host lock)
2753 * Associated ATA device, or %NULL if not found.
2756 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2758 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2760 if (unlikely(!dev || !ata_dev_enabled(dev)))
2767 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2768 * @byte1: Byte 1 from pass-thru CDB.
2771 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2774 ata_scsi_map_proto(u8 byte1)
2776 switch((byte1 & 0x1e) >> 1) {
2777 case 3: /* Non-data */
2778 return ATA_PROT_NODATA;
2781 case 10: /* UDMA Data-in */
2782 case 11: /* UDMA Data-Out */
2783 return ATA_PROT_DMA;
2785 case 4: /* PIO Data-in */
2786 case 5: /* PIO Data-out */
2787 return ATA_PROT_PIO;
2789 case 12: /* FPDMA */
2790 return ATA_PROT_NCQ;
2792 case 0: /* Hard Reset */
2794 case 8: /* Device Diagnostic */
2795 case 9: /* Device Reset */
2796 case 7: /* DMA Queued */
2797 case 15: /* Return Response Info */
2798 default: /* Reserved */
2802 return ATA_PROT_UNKNOWN;
2806 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2807 * @qc: command structure to be initialized
2809 * Handles either 12, 16, or 32-byte versions of the CDB.
2812 * Zero on success, non-zero on failure.
2814 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2816 struct ata_taskfile *tf = &(qc->tf);
2817 struct scsi_cmnd *scmd = qc->scsicmd;
2818 struct ata_device *dev = qc->dev;
2819 const u8 *cdb = scmd->cmnd;
2823 /* 7Fh variable length cmd means a ata pass-thru(32) */
2824 if (cdb[0] == VARIABLE_LENGTH_CMD)
2827 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]);
2828 if (tf->protocol == ATA_PROT_UNKNOWN) {
2833 if ((cdb[2 + cdb_offset] & 0x3) == 0) {
2835 * When T_LENGTH is zero (No data is transferred), dir should
2838 if (scmd->sc_data_direction != DMA_NONE) {
2839 fp = 2 + cdb_offset;
2843 if (ata_is_ncq(tf->protocol))
2844 tf->protocol = ATA_PROT_NCQ_NODATA;
2848 tf->flags |= ATA_TFLAG_LBA;
2851 * 12 and 16 byte CDBs use different offsets to
2852 * provide the various register values.
2857 * 16-byte CDB - may contain extended commands.
2859 * If that is the case, copy the upper byte register values.
2861 if (cdb[1] & 0x01) {
2862 tf->hob_feature = cdb[3];
2863 tf->hob_nsect = cdb[5];
2864 tf->hob_lbal = cdb[7];
2865 tf->hob_lbam = cdb[9];
2866 tf->hob_lbah = cdb[11];
2867 tf->flags |= ATA_TFLAG_LBA48;
2869 tf->flags &= ~ATA_TFLAG_LBA48;
2872 * Always copy low byte, device and command registers.
2874 tf->feature = cdb[4];
2879 tf->device = cdb[13];
2880 tf->command = cdb[14];
2884 * 12-byte CDB - incapable of extended commands.
2886 tf->flags &= ~ATA_TFLAG_LBA48;
2888 tf->feature = cdb[3];
2893 tf->device = cdb[8];
2894 tf->command = cdb[9];
2898 * 32-byte CDB - may contain extended command fields.
2900 * If that is the case, copy the upper byte register values.
2902 if (cdb[10] & 0x01) {
2903 tf->hob_feature = cdb[20];
2904 tf->hob_nsect = cdb[22];
2905 tf->hob_lbal = cdb[16];
2906 tf->hob_lbam = cdb[15];
2907 tf->hob_lbah = cdb[14];
2908 tf->flags |= ATA_TFLAG_LBA48;
2910 tf->flags &= ~ATA_TFLAG_LBA48;
2912 tf->feature = cdb[21];
2913 tf->nsect = cdb[23];
2917 tf->device = cdb[24];
2918 tf->command = cdb[25];
2919 tf->auxiliary = get_unaligned_be32(&cdb[28]);
2923 /* For NCQ commands copy the tag value */
2924 if (ata_is_ncq(tf->protocol))
2925 tf->nsect = qc->hw_tag << 3;
2927 /* enforce correct master/slave bit */
2928 tf->device = dev->devno ?
2929 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2931 switch (tf->command) {
2932 /* READ/WRITE LONG use a non-standard sect_size */
2933 case ATA_CMD_READ_LONG:
2934 case ATA_CMD_READ_LONG_ONCE:
2935 case ATA_CMD_WRITE_LONG:
2936 case ATA_CMD_WRITE_LONG_ONCE:
2937 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) {
2941 qc->sect_size = scsi_bufflen(scmd);
2944 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2945 case ATA_CMD_CFA_WRITE_NE:
2946 case ATA_CMD_CFA_TRANS_SECT:
2947 case ATA_CMD_CFA_WRITE_MULT_NE:
2948 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2950 case ATA_CMD_READ_EXT:
2951 case ATA_CMD_READ_QUEUED:
2952 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2953 case ATA_CMD_FPDMA_READ:
2954 case ATA_CMD_READ_MULTI:
2955 case ATA_CMD_READ_MULTI_EXT:
2956 case ATA_CMD_PIO_READ:
2957 case ATA_CMD_PIO_READ_EXT:
2958 case ATA_CMD_READ_STREAM_DMA_EXT:
2959 case ATA_CMD_READ_STREAM_EXT:
2960 case ATA_CMD_VERIFY:
2961 case ATA_CMD_VERIFY_EXT:
2963 case ATA_CMD_WRITE_EXT:
2964 case ATA_CMD_WRITE_FUA_EXT:
2965 case ATA_CMD_WRITE_QUEUED:
2966 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
2967 case ATA_CMD_FPDMA_WRITE:
2968 case ATA_CMD_WRITE_MULTI:
2969 case ATA_CMD_WRITE_MULTI_EXT:
2970 case ATA_CMD_WRITE_MULTI_FUA_EXT:
2971 case ATA_CMD_PIO_WRITE:
2972 case ATA_CMD_PIO_WRITE_EXT:
2973 case ATA_CMD_WRITE_STREAM_DMA_EXT:
2974 case ATA_CMD_WRITE_STREAM_EXT:
2975 qc->sect_size = scmd->device->sector_size;
2978 /* Everything else uses 512 byte "sectors" */
2980 qc->sect_size = ATA_SECT_SIZE;
2984 * Set flags so that all registers will be written, pass on
2985 * write indication (used for PIO/DMA setup), result TF is
2986 * copied back and we don't whine too much about its failure.
2988 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2989 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2990 tf->flags |= ATA_TFLAG_WRITE;
2992 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2995 * Set transfer length.
2997 * TODO: find out if we need to do more here to
2998 * cover scatter/gather case.
3000 ata_qc_set_pc_nbytes(qc);
3002 /* We may not issue DMA commands if no DMA mode is set */
3003 if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) {
3008 /* We may not issue NCQ commands to devices not supporting NCQ */
3009 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) {
3014 /* sanity check for pio multi commands */
3015 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) {
3020 if (is_multi_taskfile(tf)) {
3021 unsigned int multi_count = 1 << (cdb[1] >> 5);
3023 /* compare the passed through multi_count
3024 * with the cached multi_count of libata
3026 if (multi_count != dev->multi_count)
3027 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3032 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3033 * SET_FEATURES - XFER MODE must be preceded/succeeded
3034 * by an update to hardware-specific registers for each
3035 * controller (i.e. the reason for ->set_piomode(),
3036 * ->set_dmamode(), and ->post_set_mode() hooks).
3038 if (tf->command == ATA_CMD_SET_FEATURES &&
3039 tf->feature == SETFEATURES_XFER) {
3040 fp = (cdb[0] == ATA_16) ? 4 : 3;
3045 * Filter TPM commands by default. These provide an
3046 * essentially uncontrolled encrypted "back door" between
3047 * applications and the disk. Set libata.allow_tpm=1 if you
3048 * have a real reason for wanting to use them. This ensures
3049 * that installed software cannot easily mess stuff up without
3050 * user intent. DVR type users will probably ship with this enabled
3051 * for movie content management.
3053 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3054 * for this and should do in future but that it is not sufficient as
3055 * DCS is an optional feature set. Thus we also do the software filter
3056 * so that we comply with the TC consortium stated goal that the user
3057 * can turn off TC features of their system.
3059 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) {
3060 fp = (cdb[0] == ATA_16) ? 14 : 9;
3067 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff);
3072 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim
3073 * @cmd: SCSI command being translated
3074 * @trmax: Maximum number of entries that will fit in sector_size bytes.
3075 * @sector: Starting sector
3076 * @count: Total Range of request in logical sectors
3078 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted
3081 * Upto 64 entries of the format:
3082 * 63:48 Range Length
3085 * Range Length of 0 is ignored.
3086 * LBA's should be sorted order and not overlap.
3088 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET
3090 * Return: Number of bytes copied into sglist.
3092 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax,
3093 u64 sector, u32 count)
3095 struct scsi_device *sdp = cmd->device;
3096 size_t len = sdp->sector_size;
3100 unsigned long flags;
3102 WARN_ON(len > ATA_SCSI_RBUF_SIZE);
3104 if (len > ATA_SCSI_RBUF_SIZE)
3105 len = ATA_SCSI_RBUF_SIZE;
3107 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
3108 buf = ((void *)ata_scsi_rbuf);
3109 memset(buf, 0, len);
3111 u64 entry = sector |
3112 ((u64)(count > 0xffff ? 0xffff : count) << 48);
3113 buf[i++] = __cpu_to_le64(entry);
3114 if (count <= 0xffff)
3119 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len);
3120 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
3126 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same
3127 * @qc: Command to be translated
3129 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or
3130 * an SCT Write Same command.
3131 * Based on WRITE SAME has the UNMAP flag:
3133 * - When set translate to DSM TRIM
3134 * - When clear translate to SCT Write Same
3136 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3138 struct ata_taskfile *tf = &qc->tf;
3139 struct scsi_cmnd *scmd = qc->scsicmd;
3140 struct scsi_device *sdp = scmd->device;
3141 size_t len = sdp->sector_size;
3142 struct ata_device *dev = qc->dev;
3143 const u8 *cdb = scmd->cmnd;
3146 const u32 trmax = len >> 3;
3150 u8 unmap = cdb[1] & 0x8;
3152 /* we may not issue DMA commands if no DMA mode is set */
3153 if (unlikely(!ata_dma_enabled(dev)))
3154 goto invalid_opcode;
3157 * We only allow sending this command through the block layer,
3158 * as it modifies the DATA OUT buffer, which would corrupt user
3159 * memory for SG_IO commands.
3161 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd))))
3162 goto invalid_opcode;
3164 if (unlikely(scmd->cmd_len < 16)) {
3168 scsi_16_lba_len(cdb, &block, &n_block);
3171 (dev->horkage & ATA_HORKAGE_NOTRIM) ||
3172 !ata_id_has_trim(dev->id)) {
3177 /* If the request is too large the cmd is invalid */
3178 if (n_block > 0xffff * trmax) {
3184 * WRITE SAME always has a sector sized buffer as payload, this
3185 * should never be a multiple entry S/G list.
3187 if (!scsi_sg_count(scmd))
3188 goto invalid_param_len;
3191 * size must match sector size in bytes
3192 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count)
3193 * is defined as number of 512 byte blocks to be transferred.
3196 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block);
3198 goto invalid_param_len;
3200 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3201 /* Newer devices support queued TRIM commands */
3202 tf->protocol = ATA_PROT_NCQ;
3203 tf->command = ATA_CMD_FPDMA_SEND;
3204 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3205 tf->nsect = qc->hw_tag << 3;
3206 tf->hob_feature = (size / 512) >> 8;
3207 tf->feature = size / 512;
3211 tf->protocol = ATA_PROT_DMA;
3212 tf->hob_feature = 0;
3213 tf->feature = ATA_DSM_TRIM;
3214 tf->hob_nsect = (size / 512) >> 8;
3215 tf->nsect = size / 512;
3216 tf->command = ATA_CMD_DSM;
3219 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3222 ata_qc_set_pc_nbytes(qc);
3227 ata_scsi_set_invalid_field(dev, scmd, fp, bp);
3230 /* "Parameter list length error" */
3231 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3234 /* "Invalid command operation code" */
3235 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0);
3240 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN
3241 * @args: device MAINTENANCE_IN data / SCSI command of interest.
3242 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
3244 * Yields a subset to satisfy scsi_report_opcode()
3247 * spin_lock_irqsave(host lock)
3249 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf)
3251 struct ata_device *dev = args->dev;
3252 u8 *cdb = args->cmd->cmnd;
3254 unsigned int err = 0;
3257 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]);
3266 case SERVICE_ACTION_IN_16:
3269 case SYNCHRONIZE_CACHE:
3273 case TEST_UNIT_READY:
3274 case SEND_DIAGNOSTIC:
3275 case MAINTENANCE_IN:
3287 case MODE_SELECT_10:
3293 if (ata_id_zoned_cap(dev->id) ||
3294 dev->class == ATA_DEV_ZAC)
3297 case SECURITY_PROTOCOL_IN:
3298 case SECURITY_PROTOCOL_OUT:
3299 if (dev->flags & ATA_DFLAG_TRUSTED)
3306 rbuf[1] = supported; /* supported */
3311 * ata_scsi_report_zones_complete - convert ATA output
3312 * @qc: command structure returning the data
3314 * Convert T-13 little-endian field representation into
3315 * T-10 big-endian field representation.
3318 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc)
3320 struct scsi_cmnd *scmd = qc->scsicmd;
3321 struct sg_mapping_iter miter;
3322 unsigned long flags;
3323 unsigned int bytes = 0;
3325 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd),
3326 SG_MITER_TO_SG | SG_MITER_ATOMIC);
3328 local_irq_save(flags);
3329 while (sg_miter_next(&miter)) {
3330 unsigned int offset = 0;
3335 u64 max_lba, opt_lba;
3338 /* Swizzle header */
3340 list_length = get_unaligned_le32(&hdr[0]);
3341 same = get_unaligned_le16(&hdr[4]);
3342 max_lba = get_unaligned_le64(&hdr[8]);
3343 opt_lba = get_unaligned_le64(&hdr[16]);
3344 put_unaligned_be32(list_length, &hdr[0]);
3345 hdr[4] = same & 0xf;
3346 put_unaligned_be64(max_lba, &hdr[8]);
3347 put_unaligned_be64(opt_lba, &hdr[16]);
3351 while (offset < miter.length) {
3353 u8 cond, type, non_seq, reset;
3354 u64 size, start, wp;
3356 /* Swizzle zone descriptor */
3357 rec = miter.addr + offset;
3358 type = rec[0] & 0xf;
3359 cond = (rec[1] >> 4) & 0xf;
3360 non_seq = (rec[1] & 2);
3361 reset = (rec[1] & 1);
3362 size = get_unaligned_le64(&rec[8]);
3363 start = get_unaligned_le64(&rec[16]);
3364 wp = get_unaligned_le64(&rec[24]);
3366 rec[1] = (cond << 4) | non_seq | reset;
3367 put_unaligned_be64(size, &rec[8]);
3368 put_unaligned_be64(start, &rec[16]);
3369 put_unaligned_be64(wp, &rec[24]);
3370 WARN_ON(offset + 64 > miter.length);
3375 sg_miter_stop(&miter);
3376 local_irq_restore(flags);
3378 ata_scsi_qc_complete(qc);
3381 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc)
3383 struct ata_taskfile *tf = &qc->tf;
3384 struct scsi_cmnd *scmd = qc->scsicmd;
3385 const u8 *cdb = scmd->cmnd;
3386 u16 sect, fp = (u16)-1;
3387 u8 sa, options, bp = 0xff;
3391 if (unlikely(scmd->cmd_len < 16)) {
3392 ata_dev_warn(qc->dev, "invalid cdb length %d\n",
3397 scsi_16_lba_len(cdb, &block, &n_block);
3398 if (n_block != scsi_bufflen(scmd)) {
3399 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n",
3400 n_block, scsi_bufflen(scmd));
3401 goto invalid_param_len;
3404 if (sa != ZI_REPORT_ZONES) {
3405 ata_dev_warn(qc->dev, "invalid service action %d\n", sa);
3410 * ZAC allows only for transfers in 512 byte blocks,
3411 * and uses a 16 bit value for the transfer count.
3413 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) {
3414 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block);
3415 goto invalid_param_len;
3417 sect = n_block / 512;
3418 options = cdb[14] & 0xbf;
3420 if (ata_ncq_enabled(qc->dev) &&
3421 ata_fpdma_zac_mgmt_in_supported(qc->dev)) {
3422 tf->protocol = ATA_PROT_NCQ;
3423 tf->command = ATA_CMD_FPDMA_RECV;
3424 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f;
3425 tf->nsect = qc->hw_tag << 3;
3426 tf->feature = sect & 0xff;
3427 tf->hob_feature = (sect >> 8) & 0xff;
3428 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8);
3430 tf->command = ATA_CMD_ZAC_MGMT_IN;
3431 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES;
3432 tf->protocol = ATA_PROT_DMA;
3433 tf->hob_feature = options;
3434 tf->hob_nsect = (sect >> 8) & 0xff;
3435 tf->nsect = sect & 0xff;
3437 tf->device = ATA_LBA;
3438 tf->lbah = (block >> 16) & 0xff;
3439 tf->lbam = (block >> 8) & 0xff;
3440 tf->lbal = block & 0xff;
3441 tf->hob_lbah = (block >> 40) & 0xff;
3442 tf->hob_lbam = (block >> 32) & 0xff;
3443 tf->hob_lbal = (block >> 24) & 0xff;
3445 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3446 qc->flags |= ATA_QCFLAG_RESULT_TF;
3448 ata_qc_set_pc_nbytes(qc);
3450 qc->complete_fn = ata_scsi_report_zones_complete;
3455 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
3459 /* "Parameter list length error" */
3460 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3464 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc)
3466 struct ata_taskfile *tf = &qc->tf;
3467 struct scsi_cmnd *scmd = qc->scsicmd;
3468 struct ata_device *dev = qc->dev;
3469 const u8 *cdb = scmd->cmnd;
3475 if (unlikely(scmd->cmd_len < 16)) {
3481 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) &&
3482 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) {
3487 scsi_16_lba_len(cdb, &block, &n_block);
3490 * ZAC MANAGEMENT OUT doesn't define any length
3492 goto invalid_param_len;
3495 all = cdb[14] & 0x1;
3498 * Ignore the block address (zone ID) as defined by ZBC.
3501 } else if (block >= dev->n_sectors) {
3503 * Block must be a valid zone ID (a zone start LBA).
3509 if (ata_ncq_enabled(qc->dev) &&
3510 ata_fpdma_zac_mgmt_out_supported(qc->dev)) {
3511 tf->protocol = ATA_PROT_NCQ_NODATA;
3512 tf->command = ATA_CMD_NCQ_NON_DATA;
3513 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT;
3514 tf->nsect = qc->hw_tag << 3;
3515 tf->auxiliary = sa | ((u16)all << 8);
3517 tf->protocol = ATA_PROT_NODATA;
3518 tf->command = ATA_CMD_ZAC_MGMT_OUT;
3520 tf->hob_feature = all;
3522 tf->lbah = (block >> 16) & 0xff;
3523 tf->lbam = (block >> 8) & 0xff;
3524 tf->lbal = block & 0xff;
3525 tf->hob_lbah = (block >> 40) & 0xff;
3526 tf->hob_lbam = (block >> 32) & 0xff;
3527 tf->hob_lbal = (block >> 24) & 0xff;
3528 tf->device = ATA_LBA;
3529 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3534 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
3537 /* "Parameter list length error" */
3538 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3543 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3544 * @qc: Storage for translated ATA taskfile
3545 * @buf: input buffer
3546 * @len: number of valid bytes in the input buffer
3547 * @fp: out parameter for the failed field on error
3549 * Prepare a taskfile to modify caching information for the device.
3554 static int ata_mselect_caching(struct ata_queued_cmd *qc,
3555 const u8 *buf, int len, u16 *fp)
3557 struct ata_taskfile *tf = &qc->tf;
3558 struct ata_device *dev = qc->dev;
3559 u8 mpage[CACHE_MPAGE_LEN];
3564 * The first two bytes of def_cache_mpage are a header, so offsets
3565 * in mpage are off by 2 compared to buf. Same for len.
3568 if (len != CACHE_MPAGE_LEN - 2) {
3569 *fp = min(len, CACHE_MPAGE_LEN - 2);
3573 wce = buf[0] & (1 << 2);
3576 * Check that read-only bits are not modified.
3578 ata_msense_caching(dev->id, mpage, false);
3579 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) {
3582 if (mpage[i + 2] != buf[i]) {
3588 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3589 tf->protocol = ATA_PROT_NODATA;
3591 tf->command = ATA_CMD_SET_FEATURES;
3592 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3597 * ata_mselect_control - Simulate MODE SELECT for control page
3598 * @qc: Storage for translated ATA taskfile
3599 * @buf: input buffer
3600 * @len: number of valid bytes in the input buffer
3601 * @fp: out parameter for the failed field on error
3603 * Prepare a taskfile to modify caching information for the device.
3608 static int ata_mselect_control(struct ata_queued_cmd *qc,
3609 const u8 *buf, int len, u16 *fp)
3611 struct ata_device *dev = qc->dev;
3612 u8 mpage[CONTROL_MPAGE_LEN];
3617 * The first two bytes of def_control_mpage are a header, so offsets
3618 * in mpage are off by 2 compared to buf. Same for len.
3621 if (len != CONTROL_MPAGE_LEN - 2) {
3622 *fp = min(len, CONTROL_MPAGE_LEN - 2);
3626 d_sense = buf[0] & (1 << 2);
3629 * Check that read-only bits are not modified.
3631 ata_msense_control(dev, mpage, false);
3632 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) {
3635 if (mpage[2 + i] != buf[i]) {
3640 if (d_sense & (1 << 2))
3641 dev->flags |= ATA_DFLAG_D_SENSE;
3643 dev->flags &= ~ATA_DFLAG_D_SENSE;
3648 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands
3649 * @qc: Storage for translated ATA taskfile
3651 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3652 * Assume this is invoked for direct access devices (e.g. disks) only.
3653 * There should be no block descriptor for other device types.
3656 * spin_lock_irqsave(host lock)
3658 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3660 struct scsi_cmnd *scmd = qc->scsicmd;
3661 const u8 *cdb = scmd->cmnd;
3663 unsigned six_byte, pg_len, hdr_len, bd_len;
3668 const u8 *p = buffer;
3670 six_byte = (cdb[0] == MODE_SELECT);
3672 if (scmd->cmd_len < 5) {
3680 if (scmd->cmd_len < 9) {
3685 len = get_unaligned_be16(&cdb[7]);
3689 /* We only support PF=1, SP=0. */
3690 if ((cdb[1] & 0x11) != 0x10) {
3692 bp = (cdb[1] & 0x01) ? 1 : 5;
3696 /* Test early for possible overrun. */
3697 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
3698 goto invalid_param_len;
3700 /* Move past header and block descriptors. */
3702 goto invalid_param_len;
3704 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd),
3705 buffer, sizeof(buffer)))
3706 goto invalid_param_len;
3711 bd_len = get_unaligned_be16(&p[6]);
3716 goto invalid_param_len;
3717 if (bd_len != 0 && bd_len != 8) {
3718 fp = (six_byte) ? 3 : 6;
3719 fp += bd_len + hdr_len;
3728 /* Parse both possible formats for the mode page headers. */
3732 goto invalid_param_len;
3735 pg_len = get_unaligned_be16(&p[2]);
3740 goto invalid_param_len;
3749 * No mode subpages supported (yet) but asking for _all_
3750 * subpages may be valid
3752 if (spg && (spg != ALL_SUB_MPAGES)) {
3753 fp = (p[0] & 0x40) ? 1 : 0;
3754 fp += hdr_len + bd_len;
3758 goto invalid_param_len;
3762 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) {
3763 fp += hdr_len + bd_len;
3768 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) {
3769 fp += hdr_len + bd_len;
3772 goto skip; /* No ATA command to send */
3775 default: /* invalid page code */
3776 fp = bd_len + hdr_len;
3781 * Only one page has changeable data, so we only support setting one
3790 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
3794 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp);
3798 /* "Parameter list length error" */
3799 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3803 scmd->result = SAM_STAT_GOOD;
3807 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma)
3810 return ATA_CMD_TRUSTED_NONDATA;
3812 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND;
3814 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV;
3817 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc)
3819 struct scsi_cmnd *scmd = qc->scsicmd;
3820 const u8 *cdb = scmd->cmnd;
3821 struct ata_taskfile *tf = &qc->tf;
3823 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT);
3824 u16 spsp = get_unaligned_be16(&cdb[2]);
3825 u32 len = get_unaligned_be32(&cdb[6]);
3826 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO);
3829 * We don't support the ATA "security" protocol.
3832 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0);
3836 if (cdb[4] & 7) { /* INC_512 */
3838 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0);
3842 if (len > 0x01fffe00) {
3843 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0);
3847 /* convert to the sector-based ATA addressing */
3848 len = (len + 511) / 512;
3851 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO;
3852 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA;
3854 tf->flags |= ATA_TFLAG_WRITE;
3855 tf->command = ata_scsi_trusted_op(len, send, dma);
3857 tf->lbam = spsp & 0xff;
3858 tf->lbah = spsp >> 8;
3861 tf->nsect = len & 0xff;
3862 tf->lbal = len >> 8;
3865 tf->lbah = (1 << 7);
3868 ata_qc_set_pc_nbytes(qc);
3873 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler
3874 * @qc: Command to be translated
3876 * Translate a SCSI variable length CDB to specified commands.
3877 * It checks a service action value in CDB to call corresponding handler.
3880 * Zero on success, non-zero on failure
3883 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc)
3885 struct scsi_cmnd *scmd = qc->scsicmd;
3886 const u8 *cdb = scmd->cmnd;
3887 const u16 sa = get_unaligned_be16(&cdb[8]);
3890 * if service action represents a ata pass-thru(32) command,
3891 * then pass it to ata_scsi_pass_thru handler.
3894 return ata_scsi_pass_thru(qc);
3896 /* unsupported service action */
3901 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3903 * @cmd: SCSI command opcode to consider
3905 * Look up the SCSI command given, and determine whether the
3906 * SCSI command is to be translated or simulated.
3909 * Pointer to translation function if possible, %NULL if not.
3912 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3922 return ata_scsi_rw_xlat;
3925 return ata_scsi_write_same_xlat;
3927 case SYNCHRONIZE_CACHE:
3928 if (ata_try_flush_cache(dev))
3929 return ata_scsi_flush_xlat;
3934 return ata_scsi_verify_xlat;
3938 return ata_scsi_pass_thru;
3940 case VARIABLE_LENGTH_CMD:
3941 return ata_scsi_var_len_cdb_xlat;
3944 case MODE_SELECT_10:
3945 return ata_scsi_mode_select_xlat;
3948 return ata_scsi_zbc_in_xlat;
3951 return ata_scsi_zbc_out_xlat;
3953 case SECURITY_PROTOCOL_IN:
3954 case SECURITY_PROTOCOL_OUT:
3955 if (!(dev->flags & ATA_DFLAG_TRUSTED))
3957 return ata_scsi_security_inout_xlat;
3960 return ata_scsi_start_stop_xlat;
3966 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev)
3968 u8 scsi_op = scmd->cmnd[0];
3969 ata_xlat_func_t xlat_func;
3971 if (unlikely(!scmd->cmd_len))
3974 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
3975 if (unlikely(scmd->cmd_len > dev->cdb_len))
3978 xlat_func = ata_get_xlat_func(dev, scsi_op);
3979 } else if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3980 /* relay SCSI command to ATAPI device */
3981 int len = COMMAND_SIZE(scsi_op);
3983 if (unlikely(len > scmd->cmd_len ||
3984 len > dev->cdb_len ||
3985 scmd->cmd_len > ATAPI_CDB_LEN))
3988 xlat_func = atapi_xlat;
3990 /* ATA_16 passthru, treat as an ATA command */
3991 if (unlikely(scmd->cmd_len > 16))
3994 xlat_func = ata_get_xlat_func(dev, scsi_op);
3998 return ata_scsi_translate(dev, scmd, xlat_func);
4000 ata_scsi_simulate(dev, scmd);
4005 scmd->result = DID_ERROR << 16;
4011 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
4012 * @shost: SCSI host of command to be sent
4013 * @cmd: SCSI command to be sent
4015 * In some cases, this function translates SCSI commands into
4016 * ATA taskfiles, and queues the taskfiles to be sent to
4017 * hardware. In other cases, this function simulates a
4018 * SCSI device by evaluating and responding to certain
4019 * SCSI commands. This creates the overall effect of
4020 * ATA and ATAPI devices appearing as SCSI devices.
4026 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4029 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
4031 struct ata_port *ap;
4032 struct ata_device *dev;
4033 struct scsi_device *scsidev = cmd->device;
4035 unsigned long irq_flags;
4037 ap = ata_shost_to_port(shost);
4039 spin_lock_irqsave(ap->lock, irq_flags);
4041 dev = ata_scsi_find_dev(ap, scsidev);
4043 rc = __ata_scsi_queuecmd(cmd, dev);
4045 cmd->result = (DID_BAD_TARGET << 16);
4049 spin_unlock_irqrestore(ap->lock, irq_flags);
4053 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
4056 * ata_scsi_simulate - simulate SCSI command on ATA device
4057 * @dev: the target device
4058 * @cmd: SCSI command being sent to device.
4060 * Interprets and directly executes a select list of SCSI commands
4061 * that can be handled internally.
4064 * spin_lock_irqsave(host lock)
4067 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
4069 struct ata_scsi_args args;
4070 const u8 *scsicmd = cmd->cmnd;
4077 switch(scsicmd[0]) {
4079 if (scsicmd[1] & 2) /* is CmdDt set? */
4080 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4081 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
4082 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
4083 else switch (scsicmd[2]) {
4085 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
4088 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
4091 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
4094 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
4097 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
4100 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
4103 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
4106 if (dev->flags & ATA_DFLAG_ZAC)
4107 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6);
4109 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
4113 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b9);
4115 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
4118 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
4125 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
4129 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4132 case SERVICE_ACTION_IN_16:
4133 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
4134 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4136 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4140 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
4144 ata_scsi_set_sense(dev, cmd, 0, 0, 0);
4147 /* if we reach this, then writeback caching is disabled,
4148 * turning this into a no-op.
4150 case SYNCHRONIZE_CACHE:
4153 /* no-op's, complete with success */
4157 case TEST_UNIT_READY:
4160 case SEND_DIAGNOSTIC:
4161 tmp8 = scsicmd[1] & ~(1 << 3);
4162 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4])
4163 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4166 case MAINTENANCE_IN:
4167 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES)
4168 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in);
4170 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4173 /* all other commands */
4175 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0);
4176 /* "Invalid command operation code" */
4183 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
4187 for (i = 0; i < host->n_ports; i++) {
4188 struct ata_port *ap = host->ports[i];
4189 struct Scsi_Host *shost;
4192 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
4196 shost->eh_noresume = 1;
4197 *(struct ata_port **)&shost->hostdata[0] = ap;
4198 ap->scsi_host = shost;
4200 shost->transportt = ata_scsi_transport_template;
4201 shost->unique_id = ap->print_id;
4204 shost->max_channel = 1;
4205 shost->max_cmd_len = 32;
4207 /* Schedule policy is determined by ->qc_defer()
4208 * callback and it needs to see every deferred qc.
4209 * Set host_blocked to 1 to prevent SCSI midlayer from
4210 * automatically deferring requests.
4212 shost->max_host_blocked = 1;
4214 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev);
4223 struct Scsi_Host *shost = host->ports[i]->scsi_host;
4225 /* scsi_host_put() is in ata_devres_release() */
4226 scsi_remove_host(shost);
4232 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap)
4234 struct scsi_device *sdev = dev->sdev;
4235 struct device *d = ap->host->dev;
4236 struct device_node *np = d->of_node;
4237 struct device_node *child;
4239 for_each_available_child_of_node(np, child) {
4243 ret = of_property_read_u32(child, "reg", &val);
4246 if (val == dev->devno) {
4247 dev_dbg(d, "found matching device node\n");
4248 sdev->sdev_gendev.of_node = child;
4254 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap)
4259 void ata_scsi_scan_host(struct ata_port *ap, int sync)
4262 struct ata_device *last_failed_dev = NULL;
4263 struct ata_link *link;
4264 struct ata_device *dev;
4267 ata_for_each_link(link, ap, EDGE) {
4268 ata_for_each_dev(dev, link, ENABLED) {
4269 struct scsi_device *sdev;
4270 int channel = 0, id = 0;
4275 if (ata_is_host_link(link))
4278 channel = link->pmp;
4280 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
4282 if (!IS_ERR(sdev)) {
4284 ata_scsi_assign_ofnode(dev, ap);
4285 scsi_device_put(sdev);
4292 /* If we scanned while EH was in progress or allocation
4293 * failure occurred, scan would have failed silently. Check
4294 * whether all devices are attached.
4296 ata_for_each_link(link, ap, EDGE) {
4297 ata_for_each_dev(dev, link, ENABLED) {
4306 /* we're missing some SCSI devices */
4308 /* If caller requested synchrnous scan && we've made
4309 * any progress, sleep briefly and repeat.
4311 if (dev != last_failed_dev) {
4313 last_failed_dev = dev;
4317 /* We might be failing to detect boot device, give it
4318 * a few more chances.
4326 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
4329 queue_delayed_work(system_long_wq, &ap->hotplug_task,
4330 round_jiffies_relative(HZ));
4334 * ata_scsi_offline_dev - offline attached SCSI device
4335 * @dev: ATA device to offline attached SCSI device for
4337 * This function is called from ata_eh_hotplug() and responsible
4338 * for taking the SCSI device attached to @dev offline. This
4339 * function is called with host lock which protects dev->sdev
4343 * spin_lock_irqsave(host lock)
4346 * 1 if attached SCSI device exists, 0 otherwise.
4348 int ata_scsi_offline_dev(struct ata_device *dev)
4351 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
4358 * ata_scsi_remove_dev - remove attached SCSI device
4359 * @dev: ATA device to remove attached SCSI device for
4361 * This function is called from ata_eh_scsi_hotplug() and
4362 * responsible for removing the SCSI device attached to @dev.
4365 * Kernel thread context (may sleep).
4367 static void ata_scsi_remove_dev(struct ata_device *dev)
4369 struct ata_port *ap = dev->link->ap;
4370 struct scsi_device *sdev;
4371 unsigned long flags;
4373 /* Alas, we need to grab scan_mutex to ensure SCSI device
4374 * state doesn't change underneath us and thus
4375 * scsi_device_get() always succeeds. The mutex locking can
4376 * be removed if there is __scsi_device_get() interface which
4377 * increments reference counts regardless of device state.
4379 mutex_lock(&ap->scsi_host->scan_mutex);
4380 spin_lock_irqsave(ap->lock, flags);
4382 /* clearing dev->sdev is protected by host lock */
4387 /* If user initiated unplug races with us, sdev can go
4388 * away underneath us after the host lock and
4389 * scan_mutex are released. Hold onto it.
4391 if (scsi_device_get(sdev) == 0) {
4392 /* The following ensures the attached sdev is
4393 * offline on return from ata_scsi_offline_dev()
4394 * regardless it wins or loses the race
4395 * against this function.
4397 scsi_device_set_state(sdev, SDEV_OFFLINE);
4404 spin_unlock_irqrestore(ap->lock, flags);
4405 mutex_unlock(&ap->scsi_host->scan_mutex);
4408 ata_dev_info(dev, "detaching (SCSI %s)\n",
4409 dev_name(&sdev->sdev_gendev));
4411 scsi_remove_device(sdev);
4412 scsi_device_put(sdev);
4416 static void ata_scsi_handle_link_detach(struct ata_link *link)
4418 struct ata_port *ap = link->ap;
4419 struct ata_device *dev;
4421 ata_for_each_dev(dev, link, ALL) {
4422 unsigned long flags;
4424 if (!(dev->flags & ATA_DFLAG_DETACHED))
4427 spin_lock_irqsave(ap->lock, flags);
4428 dev->flags &= ~ATA_DFLAG_DETACHED;
4429 spin_unlock_irqrestore(ap->lock, flags);
4431 if (zpodd_dev_enabled(dev))
4434 ata_scsi_remove_dev(dev);
4439 * ata_scsi_media_change_notify - send media change event
4440 * @dev: Pointer to the disk device with media change event
4442 * Tell the block layer to send a media change notification
4446 * spin_lock_irqsave(host lock)
4448 void ata_scsi_media_change_notify(struct ata_device *dev)
4451 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
4456 * ata_scsi_hotplug - SCSI part of hotplug
4457 * @work: Pointer to ATA port to perform SCSI hotplug on
4459 * Perform SCSI part of hotplug. It's executed from a separate
4460 * workqueue after EH completes. This is necessary because SCSI
4461 * hot plugging requires working EH and hot unplugging is
4462 * synchronized with hot plugging with a mutex.
4465 * Kernel thread context (may sleep).
4467 void ata_scsi_hotplug(struct work_struct *work)
4469 struct ata_port *ap =
4470 container_of(work, struct ata_port, hotplug_task.work);
4473 if (ap->pflags & ATA_PFLAG_UNLOADING)
4476 mutex_lock(&ap->scsi_scan_mutex);
4478 /* Unplug detached devices. We cannot use link iterator here
4479 * because PMP links have to be scanned even if PMP is
4480 * currently not attached. Iterate manually.
4482 ata_scsi_handle_link_detach(&ap->link);
4484 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
4485 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
4487 /* scan for new ones */
4488 ata_scsi_scan_host(ap, 0);
4490 mutex_unlock(&ap->scsi_scan_mutex);
4494 * ata_scsi_user_scan - indication for user-initiated bus scan
4495 * @shost: SCSI host to scan
4496 * @channel: Channel to scan
4500 * This function is called when user explicitly requests bus
4501 * scan. Set probe pending flag and invoke EH.
4504 * SCSI layer (we don't care)
4509 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
4510 unsigned int id, u64 lun)
4512 struct ata_port *ap = ata_shost_to_port(shost);
4513 unsigned long flags;
4516 if (!ap->ops->error_handler)
4519 if (lun != SCAN_WILD_CARD && lun)
4522 if (!sata_pmp_attached(ap)) {
4523 if (channel != SCAN_WILD_CARD && channel)
4527 if (id != SCAN_WILD_CARD && id)
4532 spin_lock_irqsave(ap->lock, flags);
4534 if (devno == SCAN_WILD_CARD) {
4535 struct ata_link *link;
4537 ata_for_each_link(link, ap, EDGE) {
4538 struct ata_eh_info *ehi = &link->eh_info;
4539 ehi->probe_mask |= ATA_ALL_DEVICES;
4540 ehi->action |= ATA_EH_RESET;
4543 struct ata_device *dev = ata_find_dev(ap, devno);
4546 struct ata_eh_info *ehi = &dev->link->eh_info;
4547 ehi->probe_mask |= 1 << dev->devno;
4548 ehi->action |= ATA_EH_RESET;
4554 ata_port_schedule_eh(ap);
4555 spin_unlock_irqrestore(ap->lock, flags);
4556 ata_port_wait_eh(ap);
4558 spin_unlock_irqrestore(ap->lock, flags);
4564 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4565 * @work: Pointer to ATA port to perform scsi_rescan_device()
4567 * After ATA pass thru (SAT) commands are executed successfully,
4568 * libata need to propagate the changes to SCSI layer.
4571 * Kernel thread context (may sleep).
4573 void ata_scsi_dev_rescan(struct work_struct *work)
4575 struct ata_port *ap =
4576 container_of(work, struct ata_port, scsi_rescan_task);
4577 struct ata_link *link;
4578 struct ata_device *dev;
4579 unsigned long flags;
4581 mutex_lock(&ap->scsi_scan_mutex);
4582 spin_lock_irqsave(ap->lock, flags);
4584 ata_for_each_link(link, ap, EDGE) {
4585 ata_for_each_dev(dev, link, ENABLED) {
4586 struct scsi_device *sdev = dev->sdev;
4590 if (scsi_device_get(sdev))
4593 spin_unlock_irqrestore(ap->lock, flags);
4594 scsi_rescan_device(&(sdev->sdev_gendev));
4595 scsi_device_put(sdev);
4596 spin_lock_irqsave(ap->lock, flags);
4600 spin_unlock_irqrestore(ap->lock, flags);
4601 mutex_unlock(&ap->scsi_scan_mutex);