1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * libata-scsi.c - helper library for ATA
5 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
6 * Copyright 2003-2004 Jeff Garzik
8 * libata documentation is available via 'make {ps|pdf}docs',
9 * as Documentation/driver-api/libata.rst
11 * Hardware documentation available from
12 * - http://www.t10.org/
13 * - http://www.t13.org/
16 #include <linux/compat.h>
17 #include <linux/slab.h>
18 #include <linux/kernel.h>
19 #include <linux/blkdev.h>
20 #include <linux/spinlock.h>
21 #include <linux/export.h>
22 #include <scsi/scsi.h>
23 #include <scsi/scsi_host.h>
24 #include <scsi/scsi_cmnd.h>
25 #include <scsi/scsi_eh.h>
26 #include <scsi/scsi_device.h>
27 #include <scsi/scsi_tcq.h>
28 #include <scsi/scsi_transport.h>
29 #include <linux/libata.h>
30 #include <linux/hdreg.h>
31 #include <linux/uaccess.h>
32 #include <linux/suspend.h>
33 #include <asm/unaligned.h>
34 #include <linux/ioprio.h>
38 #include "libata-transport.h"
40 #define ATA_SCSI_RBUF_SIZE 576
42 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
43 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
45 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
47 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
48 const struct scsi_device *scsidev);
50 #define RW_RECOVERY_MPAGE 0x1
51 #define RW_RECOVERY_MPAGE_LEN 12
52 #define CACHE_MPAGE 0x8
53 #define CACHE_MPAGE_LEN 20
54 #define CONTROL_MPAGE 0xa
55 #define CONTROL_MPAGE_LEN 12
56 #define ALL_MPAGES 0x3f
57 #define ALL_SUB_MPAGES 0xff
60 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
62 RW_RECOVERY_MPAGE_LEN - 2,
64 0, /* read retry count */
66 0, /* write retry count */
70 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
73 0, /* contains WCE, needs to be 0 for logic */
74 0, 0, 0, 0, 0, 0, 0, 0, 0,
75 0, /* contains DRA, needs to be 0 for logic */
79 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
81 CONTROL_MPAGE_LEN - 2,
82 2, /* DSENSE=0, GLTSD=1 */
83 0, /* [QAM+QERR may be 1, see 05-359r1] */
84 0, 0, 0, 0, 0xff, 0xff,
85 0, 30 /* extended self test time, see 05-359r1 */
88 static ssize_t ata_scsi_park_show(struct device *device,
89 struct device_attribute *attr, char *buf)
91 struct scsi_device *sdev = to_scsi_device(device);
93 struct ata_link *link;
94 struct ata_device *dev;
99 ap = ata_shost_to_port(sdev->host);
101 spin_lock_irq(ap->lock);
102 dev = ata_scsi_find_dev(ap, sdev);
107 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
114 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
115 link->eh_context.unloaded_mask & (1 << dev->devno) &&
116 time_after(dev->unpark_deadline, now))
117 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
122 spin_unlock_irq(ap->lock);
124 return rc ? rc : sysfs_emit(buf, "%u\n", msecs);
127 static ssize_t ata_scsi_park_store(struct device *device,
128 struct device_attribute *attr,
129 const char *buf, size_t len)
131 struct scsi_device *sdev = to_scsi_device(device);
133 struct ata_device *dev;
138 rc = kstrtol(buf, 10, &input);
143 if (input > ATA_TMOUT_MAX_PARK) {
145 input = ATA_TMOUT_MAX_PARK;
148 ap = ata_shost_to_port(sdev->host);
150 spin_lock_irqsave(ap->lock, flags);
151 dev = ata_scsi_find_dev(ap, sdev);
152 if (unlikely(!dev)) {
156 if (dev->class != ATA_DEV_ATA &&
157 dev->class != ATA_DEV_ZAC) {
163 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
168 dev->unpark_deadline = ata_deadline(jiffies, input);
169 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
170 ata_port_schedule_eh(ap);
171 complete(&ap->park_req_pending);
175 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
178 dev->flags |= ATA_DFLAG_NO_UNLOAD;
183 spin_unlock_irqrestore(ap->lock, flags);
185 return rc ? rc : len;
187 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
188 ata_scsi_park_show, ata_scsi_park_store);
189 EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
191 void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd,
192 u8 sk, u8 asc, u8 ascq)
194 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
199 scsi_build_sense(cmd, d_sense, sk, asc, ascq);
202 void ata_scsi_set_sense_information(struct ata_device *dev,
203 struct scsi_cmnd *cmd,
204 const struct ata_taskfile *tf)
211 information = ata_tf_read_block(tf, dev);
212 if (information == U64_MAX)
215 scsi_set_sense_information(cmd->sense_buffer,
216 SCSI_SENSE_BUFFERSIZE, information);
219 static void ata_scsi_set_invalid_field(struct ata_device *dev,
220 struct scsi_cmnd *cmd, u16 field, u8 bit)
222 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0);
223 /* "Invalid field in CDB" */
224 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
228 static void ata_scsi_set_invalid_parameter(struct ata_device *dev,
229 struct scsi_cmnd *cmd, u16 field)
231 /* "Invalid field in parameter list" */
232 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0);
233 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
237 static struct attribute *ata_common_sdev_attrs[] = {
238 &dev_attr_unload_heads.attr,
242 static const struct attribute_group ata_common_sdev_attr_group = {
243 .attrs = ata_common_sdev_attrs
246 const struct attribute_group *ata_common_sdev_groups[] = {
247 &ata_common_sdev_attr_group,
250 EXPORT_SYMBOL_GPL(ata_common_sdev_groups);
253 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
254 * @sdev: SCSI device for which BIOS geometry is to be determined
255 * @bdev: block device associated with @sdev
256 * @capacity: capacity of SCSI device
257 * @geom: location to which geometry will be output
259 * Generic bios head/sector/cylinder calculator
260 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
261 * mapping. Some situations may arise where the disk is not
262 * bootable if this is not used.
265 * Defined by the SCSI layer. We don't really care.
270 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
271 sector_t capacity, int geom[])
275 sector_div(capacity, 255*63);
280 EXPORT_SYMBOL_GPL(ata_std_bios_param);
283 * ata_scsi_unlock_native_capacity - unlock native capacity
284 * @sdev: SCSI device to adjust device capacity for
286 * This function is called if a partition on @sdev extends beyond
287 * the end of the device. It requests EH to unlock HPA.
290 * Defined by the SCSI layer. Might sleep.
292 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
294 struct ata_port *ap = ata_shost_to_port(sdev->host);
295 struct ata_device *dev;
298 spin_lock_irqsave(ap->lock, flags);
300 dev = ata_scsi_find_dev(ap, sdev);
301 if (dev && dev->n_sectors < dev->n_native_sectors) {
302 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
303 dev->link->eh_info.action |= ATA_EH_RESET;
304 ata_port_schedule_eh(ap);
307 spin_unlock_irqrestore(ap->lock, flags);
308 ata_port_wait_eh(ap);
310 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity);
313 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
315 * @sdev: SCSI device to get identify data for
316 * @arg: User buffer area for identify data
319 * Defined by the SCSI layer. We don't really care.
322 * Zero on success, negative errno on error.
324 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
327 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
328 u16 __user *dst = arg;
334 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
337 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
338 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
341 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
342 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
345 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
346 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
353 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
354 * @scsidev: Device to which we are issuing command
355 * @arg: User provided data for issuing command
358 * Defined by the SCSI layer. We don't really care.
361 * Zero on success, negative errno on error.
363 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
366 u8 sensebuf[SCSI_SENSE_BUFFERSIZE];
367 u8 scsi_cmd[MAX_COMMAND_SIZE];
368 u8 args[4], *argbuf = NULL;
370 enum dma_data_direction data_dir;
371 struct scsi_sense_hdr sshdr;
377 if (copy_from_user(args, arg, sizeof(args)))
380 memset(sensebuf, 0, sizeof(sensebuf));
381 memset(scsi_cmd, 0, sizeof(scsi_cmd));
384 argsize = ATA_SECT_SIZE * args[3];
385 argbuf = kmalloc(argsize, GFP_KERNEL);
386 if (argbuf == NULL) {
391 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
392 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
393 block count in sector count field */
394 data_dir = DMA_FROM_DEVICE;
396 scsi_cmd[1] = (3 << 1); /* Non-data */
397 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
401 scsi_cmd[0] = ATA_16;
403 scsi_cmd[4] = args[2];
404 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
405 scsi_cmd[6] = args[3];
406 scsi_cmd[8] = args[1];
407 scsi_cmd[10] = ATA_SMART_LBAM_PASS;
408 scsi_cmd[12] = ATA_SMART_LBAH_PASS;
410 scsi_cmd[6] = args[1];
412 scsi_cmd[14] = args[0];
414 /* Good values for timeout and retries? Values below
415 from scsi_ioctl_send_command() for default case... */
416 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
417 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL);
419 if (cmd_result < 0) {
423 if (scsi_sense_valid(&sshdr)) {/* sense data available */
424 u8 *desc = sensebuf + 8;
426 /* If we set cc then ATA pass-through will cause a
427 * check condition even if no error. Filter that. */
428 if (scsi_status_is_check_condition(cmd_result)) {
429 if (sshdr.sense_key == RECOVERED_ERROR &&
430 sshdr.asc == 0 && sshdr.ascq == 0x1d)
431 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
434 /* Send userspace a few ATA registers (same as drivers/ide) */
435 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
436 desc[0] == 0x09) { /* code is "ATA Descriptor" */
437 args[0] = desc[13]; /* status */
438 args[1] = desc[3]; /* error */
439 args[2] = desc[5]; /* sector count (0:7) */
440 if (copy_to_user(arg, args, sizeof(args)))
452 && copy_to_user(arg + sizeof(args), argbuf, argsize))
460 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
461 * @scsidev: Device to which we are issuing command
462 * @arg: User provided data for issuing command
465 * Defined by the SCSI layer. We don't really care.
468 * Zero on success, negative errno on error.
470 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
473 u8 sensebuf[SCSI_SENSE_BUFFERSIZE];
474 u8 scsi_cmd[MAX_COMMAND_SIZE];
476 struct scsi_sense_hdr sshdr;
482 if (copy_from_user(args, arg, sizeof(args)))
485 memset(sensebuf, 0, sizeof(sensebuf));
486 memset(scsi_cmd, 0, sizeof(scsi_cmd));
487 scsi_cmd[0] = ATA_16;
488 scsi_cmd[1] = (3 << 1); /* Non-data */
489 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
490 scsi_cmd[4] = args[1];
491 scsi_cmd[6] = args[2];
492 scsi_cmd[8] = args[3];
493 scsi_cmd[10] = args[4];
494 scsi_cmd[12] = args[5];
495 scsi_cmd[13] = args[6] & 0x4f;
496 scsi_cmd[14] = args[0];
498 /* Good values for timeout and retries? Values below
499 from scsi_ioctl_send_command() for default case... */
500 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
501 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL);
503 if (cmd_result < 0) {
507 if (scsi_sense_valid(&sshdr)) {/* sense data available */
508 u8 *desc = sensebuf + 8;
510 /* If we set cc then ATA pass-through will cause a
511 * check condition even if no error. Filter that. */
512 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
513 if (sshdr.sense_key == RECOVERED_ERROR &&
514 sshdr.asc == 0 && sshdr.ascq == 0x1d)
515 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
518 /* Send userspace ATA registers */
519 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
520 desc[0] == 0x09) {/* code is "ATA Descriptor" */
521 args[0] = desc[13]; /* status */
522 args[1] = desc[3]; /* error */
523 args[2] = desc[5]; /* sector count (0:7) */
524 args[3] = desc[7]; /* lbal */
525 args[4] = desc[9]; /* lbam */
526 args[5] = desc[11]; /* lbah */
527 args[6] = desc[12]; /* select */
528 if (copy_to_user(arg, args, sizeof(args)))
542 static int ata_ioc32(struct ata_port *ap)
544 if (ap->flags & ATA_FLAG_PIO_DMA)
546 if (ap->pflags & ATA_PFLAG_PIO32)
552 * This handles both native and compat commands, so anything added
553 * here must have a compatible argument, or check in_compat_syscall()
555 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
556 unsigned int cmd, void __user *arg)
564 spin_lock_irqsave(ap->lock, flags);
566 spin_unlock_irqrestore(ap->lock, flags);
568 if (in_compat_syscall())
569 return put_user(val, (compat_ulong_t __user *)arg);
571 return put_user(val, (unsigned long __user *)arg);
574 val = (unsigned long) arg;
576 spin_lock_irqsave(ap->lock, flags);
577 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
579 ap->pflags |= ATA_PFLAG_PIO32;
581 ap->pflags &= ~ATA_PFLAG_PIO32;
583 if (val != ata_ioc32(ap))
586 spin_unlock_irqrestore(ap->lock, flags);
589 case HDIO_GET_IDENTITY:
590 return ata_get_identity(ap, scsidev, arg);
593 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
595 return ata_cmd_ioctl(scsidev, arg);
597 case HDIO_DRIVE_TASK:
598 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
600 return ata_task_ioctl(scsidev, arg);
609 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
611 int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd,
614 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
617 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
620 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
621 * @dev: ATA device to which the new command is attached
622 * @cmd: SCSI command that originated this ATA command
624 * Obtain a reference to an unused ata_queued_cmd structure,
625 * which is the basic libata structure representing a single
626 * ATA command sent to the hardware.
628 * If a command was available, fill in the SCSI-specific
629 * portions of the structure with information on the
633 * spin_lock_irqsave(host lock)
636 * Command allocated, or %NULL if none available.
638 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
639 struct scsi_cmnd *cmd)
641 struct ata_queued_cmd *qc;
643 qc = ata_qc_new_init(dev, scsi_cmd_to_rq(cmd)->tag);
646 qc->scsidone = scsi_done;
648 qc->sg = scsi_sglist(cmd);
649 qc->n_elem = scsi_sg_count(cmd);
651 if (scsi_cmd_to_rq(cmd)->rq_flags & RQF_QUIET)
652 qc->flags |= ATA_QCFLAG_QUIET;
654 cmd->result = (DID_OK << 16) | SAM_STAT_TASK_SET_FULL;
661 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
663 struct scsi_cmnd *scmd = qc->scsicmd;
665 qc->extrabytes = scmd->extra_len;
666 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
670 * ata_dump_status - user friendly display of error info
671 * @id: id of the port in question
672 * @tf: ptr to filled out taskfile
674 * Decode and dump the ATA error/status registers for the user so
675 * that they have some idea what really happened at the non
676 * make-believe layer.
679 * inherited from caller
681 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
683 u8 stat = tf->command, err = tf->feature;
685 pr_warn("ata%u: status=0x%02x { ", id, stat);
686 if (stat & ATA_BUSY) {
687 pr_cont("Busy }\n"); /* Data is not valid in this case */
689 if (stat & ATA_DRDY) pr_cont("DriveReady ");
690 if (stat & ATA_DF) pr_cont("DeviceFault ");
691 if (stat & ATA_DSC) pr_cont("SeekComplete ");
692 if (stat & ATA_DRQ) pr_cont("DataRequest ");
693 if (stat & ATA_CORR) pr_cont("CorrectedError ");
694 if (stat & ATA_SENSE) pr_cont("Sense ");
695 if (stat & ATA_ERR) pr_cont("Error ");
699 pr_warn("ata%u: error=0x%02x { ", id, err);
700 if (err & ATA_ABORTED) pr_cont("DriveStatusError ");
701 if (err & ATA_ICRC) {
702 if (err & ATA_ABORTED)
704 else pr_cont("Sector ");
706 if (err & ATA_UNC) pr_cont("UncorrectableError ");
707 if (err & ATA_IDNF) pr_cont("SectorIdNotFound ");
708 if (err & ATA_TRK0NF) pr_cont("TrackZeroNotFound ");
709 if (err & ATA_AMNF) pr_cont("AddrMarkNotFound ");
716 * ata_to_sense_error - convert ATA error to SCSI error
717 * @id: ATA device number
718 * @drv_stat: value contained in ATA status register
719 * @drv_err: value contained in ATA error register
720 * @sk: the sense key we'll fill out
721 * @asc: the additional sense code we'll fill out
722 * @ascq: the additional sense code qualifier we'll fill out
723 * @verbose: be verbose
725 * Converts an ATA error into a SCSI error. Fill out pointers to
726 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
727 * format sense blocks.
730 * spin_lock_irqsave(host lock)
732 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
733 u8 *asc, u8 *ascq, int verbose)
737 /* Based on the 3ware driver translation table */
738 static const unsigned char sense_table[][4] = {
740 {0xd1, ABORTED_COMMAND, 0x00, 0x00},
741 // Device busy Aborted command
743 {0xd0, ABORTED_COMMAND, 0x00, 0x00},
744 // Device busy Aborted command
746 {0x61, HARDWARE_ERROR, 0x00, 0x00},
747 // Device fault Hardware error
748 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
749 {0x84, ABORTED_COMMAND, 0x47, 0x00},
750 // Data CRC error SCSI parity error
751 /* MC|ID|ABRT|TRK0|MARK */
752 {0x37, NOT_READY, 0x04, 0x00},
753 // Unit offline Not ready
755 {0x09, NOT_READY, 0x04, 0x00},
756 // Unrecovered disk error Not ready
757 /* Bad address mark */
758 {0x01, MEDIUM_ERROR, 0x13, 0x00},
759 // Address mark not found for data field
760 /* TRK0 - Track 0 not found */
761 {0x02, HARDWARE_ERROR, 0x00, 0x00},
763 /* Abort: 0x04 is not translated here, see below */
764 /* Media change request */
765 {0x08, NOT_READY, 0x04, 0x00},
766 // FIXME: faking offline
767 /* SRV/IDNF - ID not found */
768 {0x10, ILLEGAL_REQUEST, 0x21, 0x00},
769 // Logical address out of range
770 /* MC - Media Changed */
771 {0x20, UNIT_ATTENTION, 0x28, 0x00},
772 // Not ready to ready change, medium may have changed
773 /* ECC - Uncorrectable ECC error */
774 {0x40, MEDIUM_ERROR, 0x11, 0x04},
775 // Unrecovered read error
776 /* BBD - block marked bad */
777 {0x80, MEDIUM_ERROR, 0x11, 0x04},
778 // Block marked bad Medium error, unrecovered read error
779 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
781 static const unsigned char stat_table[][4] = {
782 /* Must be first because BUSY means no other bits valid */
783 {0x80, ABORTED_COMMAND, 0x47, 0x00},
784 // Busy, fake parity for now
785 {0x40, ILLEGAL_REQUEST, 0x21, 0x04},
786 // Device ready, unaligned write command
787 {0x20, HARDWARE_ERROR, 0x44, 0x00},
788 // Device fault, internal target failure
789 {0x08, ABORTED_COMMAND, 0x47, 0x00},
790 // Timed out in xfer, fake parity for now
791 {0x04, RECOVERED_ERROR, 0x11, 0x00},
792 // Recovered ECC error Medium error, recovered
793 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
797 * Is this an error we can process/parse
799 if (drv_stat & ATA_BUSY) {
800 drv_err = 0; /* Ignore the err bits, they're invalid */
804 /* Look for drv_err */
805 for (i = 0; sense_table[i][0] != 0xFF; i++) {
806 /* Look for best matches first */
807 if ((sense_table[i][0] & drv_err) ==
809 *sk = sense_table[i][1];
810 *asc = sense_table[i][2];
811 *ascq = sense_table[i][3];
818 * Fall back to interpreting status bits. Note that if the drv_err
819 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
820 * is not descriptive enough.
822 for (i = 0; stat_table[i][0] != 0xFF; i++) {
823 if (stat_table[i][0] & drv_stat) {
824 *sk = stat_table[i][1];
825 *asc = stat_table[i][2];
826 *ascq = stat_table[i][3];
832 * We need a sensible error return here, which is tricky, and one
833 * that won't cause people to do things like return a disk wrongly.
835 *sk = ABORTED_COMMAND;
841 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
842 id, drv_stat, drv_err, *sk, *asc, *ascq);
847 * ata_gen_passthru_sense - Generate check condition sense block.
848 * @qc: Command that completed.
850 * This function is specific to the ATA descriptor format sense
851 * block specified for the ATA pass through commands. Regardless
852 * of whether the command errored or not, return a sense
853 * block. Copy all controller registers into the sense
854 * block. If there was no error, we get the request from an ATA
855 * passthrough command, so we use the following sense data:
856 * sk = RECOVERED ERROR
857 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
863 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
865 struct scsi_cmnd *cmd = qc->scsicmd;
866 struct ata_taskfile *tf = &qc->result_tf;
867 unsigned char *sb = cmd->sense_buffer;
868 unsigned char *desc = sb + 8;
869 int verbose = qc->ap->ops->error_handler == NULL;
870 u8 sense_key, asc, ascq;
872 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
875 * Use ata_to_sense_error() to map status register bits
876 * onto sense key, asc & ascq.
879 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
880 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
881 &sense_key, &asc, &ascq, verbose);
882 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq);
885 * ATA PASS-THROUGH INFORMATION AVAILABLE
886 * Always in descriptor format sense.
888 scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D);
891 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) {
894 /* descriptor format */
896 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9);
898 if (SCSI_SENSE_BUFFERSIZE < len + 14)
906 * Copy registers into sense buffer.
909 desc[3] = tf->feature; /* == error reg */
914 desc[12] = tf->device;
915 desc[13] = tf->command; /* == status reg */
918 * Fill in Extend bit, and the high order bytes
921 if (tf->flags & ATA_TFLAG_LBA48) {
923 desc[4] = tf->hob_nsect;
924 desc[6] = tf->hob_lbal;
925 desc[8] = tf->hob_lbam;
926 desc[10] = tf->hob_lbah;
929 /* Fixed sense format */
930 desc[0] = tf->feature;
931 desc[1] = tf->command; /* status */
932 desc[2] = tf->device;
935 if (tf->flags & ATA_TFLAG_LBA48) {
939 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah)
949 * ata_gen_ata_sense - generate a SCSI fixed sense block
950 * @qc: Command that we are erroring out
952 * Generate sense block for a failed ATA command @qc. Descriptor
953 * format is used to accommodate LBA48 block address.
958 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
960 struct ata_device *dev = qc->dev;
961 struct scsi_cmnd *cmd = qc->scsicmd;
962 struct ata_taskfile *tf = &qc->result_tf;
963 unsigned char *sb = cmd->sense_buffer;
964 int verbose = qc->ap->ops->error_handler == NULL;
966 u8 sense_key, asc, ascq;
968 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
970 if (ata_dev_disabled(dev)) {
971 /* Device disabled after error recovery */
972 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
973 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21);
976 /* Use ata_to_sense_error() to map status register bits
977 * onto sense key, asc & ascq.
980 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
981 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
982 &sense_key, &asc, &ascq, verbose);
983 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq);
985 /* Could not decode error */
986 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n",
987 tf->command, qc->err_mask);
988 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0);
992 block = ata_tf_read_block(&qc->result_tf, dev);
993 if (block == U64_MAX)
996 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block);
999 void ata_scsi_sdev_config(struct scsi_device *sdev)
1001 sdev->use_10_for_rw = 1;
1002 sdev->use_10_for_ms = 1;
1003 sdev->no_write_same = 1;
1005 /* Schedule policy is determined by ->qc_defer() callback and
1006 * it needs to see every deferred qc. Set dev_blocked to 1 to
1007 * prevent SCSI midlayer from automatically deferring
1010 sdev->max_device_blocked = 1;
1014 * ata_scsi_dma_need_drain - Check whether data transfer may overflow
1015 * @rq: request to be checked
1017 * ATAPI commands which transfer variable length data to host
1018 * might overflow due to application error or hardware bug. This
1019 * function checks whether overflow should be drained and ignored
1026 * 1 if ; otherwise, 0.
1028 bool ata_scsi_dma_need_drain(struct request *rq)
1030 return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC;
1032 EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain);
1034 int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev)
1036 struct request_queue *q = sdev->request_queue;
1038 if (!ata_id_has_unload(dev->id))
1039 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1041 /* configure max sectors */
1042 blk_queue_max_hw_sectors(q, dev->max_sectors);
1044 if (dev->class == ATA_DEV_ATAPI) {
1045 sdev->sector_size = ATA_SECT_SIZE;
1047 /* set DMA padding */
1048 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1050 /* make room for appending the drain */
1051 blk_queue_max_segments(q, queue_max_segments(q) - 1);
1053 sdev->dma_drain_len = ATAPI_MAX_DRAIN;
1054 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len, GFP_NOIO);
1055 if (!sdev->dma_drain_buf) {
1056 ata_dev_err(dev, "drain buffer allocation failed\n");
1060 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1061 sdev->manage_start_stop = 1;
1065 * ata_pio_sectors() expects buffer for each sector to not cross
1066 * page boundary. Enforce it by requiring buffers to be sector
1067 * aligned, which works iff sector_size is not larger than
1068 * PAGE_SIZE. ATAPI devices also need the alignment as
1069 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1071 if (sdev->sector_size > PAGE_SIZE)
1073 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1076 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1078 if (dev->flags & ATA_DFLAG_AN)
1079 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1081 if (dev->flags & ATA_DFLAG_NCQ) {
1084 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1085 depth = min(ATA_MAX_QUEUE, depth);
1086 scsi_change_queue_depth(sdev, depth);
1089 if (dev->flags & ATA_DFLAG_TRUSTED)
1090 sdev->security_supported = 1;
1097 * ata_scsi_slave_config - Set SCSI device attributes
1098 * @sdev: SCSI device to examine
1100 * This is called before we actually start reading
1101 * and writing to the device, to configure certain
1102 * SCSI mid-layer behaviors.
1105 * Defined by SCSI layer. We don't really care.
1108 int ata_scsi_slave_config(struct scsi_device *sdev)
1110 struct ata_port *ap = ata_shost_to_port(sdev->host);
1111 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1114 ata_scsi_sdev_config(sdev);
1117 rc = ata_scsi_dev_config(sdev, dev);
1121 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
1124 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1125 * @sdev: SCSI device to be destroyed
1127 * @sdev is about to be destroyed for hot/warm unplugging. If
1128 * this unplugging was initiated by libata as indicated by NULL
1129 * dev->sdev, this function doesn't have to do anything.
1130 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1131 * Clear dev->sdev, schedule the device for ATA detach and invoke
1135 * Defined by SCSI layer. We don't really care.
1137 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1139 struct ata_port *ap = ata_shost_to_port(sdev->host);
1140 unsigned long flags;
1141 struct ata_device *dev;
1143 if (!ap->ops->error_handler)
1146 spin_lock_irqsave(ap->lock, flags);
1147 dev = __ata_scsi_find_dev(ap, sdev);
1148 if (dev && dev->sdev) {
1149 /* SCSI device already in CANCEL state, no need to offline it */
1151 dev->flags |= ATA_DFLAG_DETACH;
1152 ata_port_schedule_eh(ap);
1154 spin_unlock_irqrestore(ap->lock, flags);
1156 kfree(sdev->dma_drain_buf);
1158 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
1161 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1162 * @qc: Storage for translated ATA taskfile
1164 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1165 * (to start). Perhaps these commands should be preceded by
1166 * CHECK POWER MODE to see what power mode the device is already in.
1167 * [See SAT revision 5 at www.t10.org]
1170 * spin_lock_irqsave(host lock)
1173 * Zero on success, non-zero on error.
1175 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1177 struct scsi_cmnd *scmd = qc->scsicmd;
1178 struct ata_taskfile *tf = &qc->tf;
1179 const u8 *cdb = scmd->cmnd;
1183 if (scmd->cmd_len < 5) {
1188 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1189 tf->protocol = ATA_PROT_NODATA;
1191 ; /* ignore IMMED bit, violates sat-r05 */
1196 goto invalid_fld; /* LOEJ bit set not supported */
1198 if (((cdb[4] >> 4) & 0xf) != 0) {
1201 goto invalid_fld; /* power conditions not supported */
1205 tf->nsect = 1; /* 1 sector, lba=0 */
1207 if (qc->dev->flags & ATA_DFLAG_LBA) {
1208 tf->flags |= ATA_TFLAG_LBA;
1213 tf->device |= ATA_LBA;
1216 tf->lbal = 0x1; /* sect */
1217 tf->lbam = 0x0; /* cyl low */
1218 tf->lbah = 0x0; /* cyl high */
1221 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1223 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1224 * or S5) causing some drives to spin up and down again.
1226 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1227 system_state == SYSTEM_POWER_OFF)
1230 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1231 system_entering_hibernation())
1234 /* Issue ATA STANDBY IMMEDIATE command */
1235 tf->command = ATA_CMD_STANDBYNOW1;
1239 * Standby and Idle condition timers could be implemented but that
1240 * would require libata to implement the Power condition mode page
1241 * and allow the user to change it. Changing mode pages requires
1242 * MODE SELECT to be implemented.
1248 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
1251 scmd->result = SAM_STAT_GOOD;
1257 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1258 * @qc: Storage for translated ATA taskfile
1260 * Sets up an ATA taskfile to issue FLUSH CACHE or
1264 * spin_lock_irqsave(host lock)
1267 * Zero on success, non-zero on error.
1269 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1271 struct ata_taskfile *tf = &qc->tf;
1273 tf->flags |= ATA_TFLAG_DEVICE;
1274 tf->protocol = ATA_PROT_NODATA;
1276 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1277 tf->command = ATA_CMD_FLUSH_EXT;
1279 tf->command = ATA_CMD_FLUSH;
1281 /* flush is critical for IO integrity, consider it an IO command */
1282 qc->flags |= ATA_QCFLAG_IO;
1288 * scsi_6_lba_len - Get LBA and transfer length
1289 * @cdb: SCSI command to translate
1291 * Calculate LBA and transfer length for 6-byte commands.
1295 * @plen: the transfer length
1297 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1302 VPRINTK("six-byte command\n");
1304 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1305 lba |= ((u64)cdb[2]) << 8;
1306 lba |= ((u64)cdb[3]);
1315 * scsi_10_lba_len - Get LBA and transfer length
1316 * @cdb: SCSI command to translate
1318 * Calculate LBA and transfer length for 10-byte commands.
1322 * @plen: the transfer length
1324 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1329 VPRINTK("ten-byte command\n");
1331 lba |= ((u64)cdb[2]) << 24;
1332 lba |= ((u64)cdb[3]) << 16;
1333 lba |= ((u64)cdb[4]) << 8;
1334 lba |= ((u64)cdb[5]);
1336 len |= ((u32)cdb[7]) << 8;
1337 len |= ((u32)cdb[8]);
1344 * scsi_16_lba_len - Get LBA and transfer length
1345 * @cdb: SCSI command to translate
1347 * Calculate LBA and transfer length for 16-byte commands.
1351 * @plen: the transfer length
1353 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1358 VPRINTK("sixteen-byte command\n");
1360 lba |= ((u64)cdb[2]) << 56;
1361 lba |= ((u64)cdb[3]) << 48;
1362 lba |= ((u64)cdb[4]) << 40;
1363 lba |= ((u64)cdb[5]) << 32;
1364 lba |= ((u64)cdb[6]) << 24;
1365 lba |= ((u64)cdb[7]) << 16;
1366 lba |= ((u64)cdb[8]) << 8;
1367 lba |= ((u64)cdb[9]);
1369 len |= ((u32)cdb[10]) << 24;
1370 len |= ((u32)cdb[11]) << 16;
1371 len |= ((u32)cdb[12]) << 8;
1372 len |= ((u32)cdb[13]);
1379 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1380 * @qc: Storage for translated ATA taskfile
1382 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1385 * spin_lock_irqsave(host lock)
1388 * Zero on success, non-zero on error.
1390 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1392 struct scsi_cmnd *scmd = qc->scsicmd;
1393 struct ata_taskfile *tf = &qc->tf;
1394 struct ata_device *dev = qc->dev;
1395 u64 dev_sectors = qc->dev->n_sectors;
1396 const u8 *cdb = scmd->cmnd;
1401 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1402 tf->protocol = ATA_PROT_NODATA;
1404 if (cdb[0] == VERIFY) {
1405 if (scmd->cmd_len < 10) {
1409 scsi_10_lba_len(cdb, &block, &n_block);
1410 } else if (cdb[0] == VERIFY_16) {
1411 if (scmd->cmd_len < 16) {
1415 scsi_16_lba_len(cdb, &block, &n_block);
1423 if (block >= dev_sectors)
1425 if ((block + n_block) > dev_sectors)
1428 if (dev->flags & ATA_DFLAG_LBA) {
1429 tf->flags |= ATA_TFLAG_LBA;
1431 if (lba_28_ok(block, n_block)) {
1433 tf->command = ATA_CMD_VERIFY;
1434 tf->device |= (block >> 24) & 0xf;
1435 } else if (lba_48_ok(block, n_block)) {
1436 if (!(dev->flags & ATA_DFLAG_LBA48))
1440 tf->flags |= ATA_TFLAG_LBA48;
1441 tf->command = ATA_CMD_VERIFY_EXT;
1443 tf->hob_nsect = (n_block >> 8) & 0xff;
1445 tf->hob_lbah = (block >> 40) & 0xff;
1446 tf->hob_lbam = (block >> 32) & 0xff;
1447 tf->hob_lbal = (block >> 24) & 0xff;
1449 /* request too large even for LBA48 */
1452 tf->nsect = n_block & 0xff;
1454 tf->lbah = (block >> 16) & 0xff;
1455 tf->lbam = (block >> 8) & 0xff;
1456 tf->lbal = block & 0xff;
1458 tf->device |= ATA_LBA;
1461 u32 sect, head, cyl, track;
1463 if (!lba_28_ok(block, n_block))
1466 /* Convert LBA to CHS */
1467 track = (u32)block / dev->sectors;
1468 cyl = track / dev->heads;
1469 head = track % dev->heads;
1470 sect = (u32)block % dev->sectors + 1;
1472 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1473 (u32)block, track, cyl, head, sect);
1475 /* Check whether the converted CHS can fit.
1479 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1482 tf->command = ATA_CMD_VERIFY;
1483 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1486 tf->lbah = cyl >> 8;
1493 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1497 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1498 /* "Logical Block Address out of range" */
1502 scmd->result = SAM_STAT_GOOD;
1506 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks)
1508 struct request *rq = scsi_cmd_to_rq(scmd);
1511 if (!blk_rq_is_passthrough(rq))
1514 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size;
1515 if (n_blocks > req_blocks)
1522 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1523 * @qc: Storage for translated ATA taskfile
1525 * Converts any of six SCSI read/write commands into the
1526 * ATA counterpart, including starting sector (LBA),
1527 * sector count, and taking into account the device's LBA48
1530 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1531 * %WRITE_16 are currently supported.
1534 * spin_lock_irqsave(host lock)
1537 * Zero on success, non-zero on error.
1539 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1541 struct scsi_cmnd *scmd = qc->scsicmd;
1542 const u8 *cdb = scmd->cmnd;
1543 struct request *rq = scsi_cmd_to_rq(scmd);
1544 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
1545 unsigned int tf_flags = 0;
1551 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1552 tf_flags |= ATA_TFLAG_WRITE;
1554 /* Calculate the SCSI LBA, transfer length and FUA. */
1558 if (unlikely(scmd->cmd_len < 10)) {
1562 scsi_10_lba_len(cdb, &block, &n_block);
1563 if (cdb[1] & (1 << 3))
1564 tf_flags |= ATA_TFLAG_FUA;
1565 if (!ata_check_nblocks(scmd, n_block))
1570 if (unlikely(scmd->cmd_len < 6)) {
1574 scsi_6_lba_len(cdb, &block, &n_block);
1576 /* for 6-byte r/w commands, transfer length 0
1577 * means 256 blocks of data, not 0 block.
1581 if (!ata_check_nblocks(scmd, n_block))
1586 if (unlikely(scmd->cmd_len < 16)) {
1590 scsi_16_lba_len(cdb, &block, &n_block);
1591 if (cdb[1] & (1 << 3))
1592 tf_flags |= ATA_TFLAG_FUA;
1593 if (!ata_check_nblocks(scmd, n_block))
1597 DPRINTK("no-byte command\n");
1602 /* Check and compose ATA command */
1604 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1605 * length 0 means transfer 0 block of data.
1606 * However, for ATA R/W commands, sector count 0 means
1607 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1609 * WARNING: one or two older ATA drives treat 0 as 0...
1613 qc->flags |= ATA_QCFLAG_IO;
1614 qc->nbytes = n_block * scmd->device->sector_size;
1616 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1619 if (likely(rc == 0))
1624 /* treat all other errors as -EINVAL, fall through */
1626 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1630 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1631 /* "Logical Block Address out of range" */
1635 scmd->result = SAM_STAT_GOOD;
1639 static void ata_qc_done(struct ata_queued_cmd *qc)
1641 struct scsi_cmnd *cmd = qc->scsicmd;
1642 void (*done)(struct scsi_cmnd *) = qc->scsidone;
1648 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1650 struct ata_port *ap = qc->ap;
1651 struct scsi_cmnd *cmd = qc->scsicmd;
1652 u8 *cdb = cmd->cmnd;
1653 int need_sense = (qc->err_mask != 0);
1655 /* For ATA pass thru (SAT) commands, generate a sense block if
1656 * user mandated it or if there's an error. Note that if we
1657 * generate because the user forced us to [CK_COND =1], a check
1658 * condition is generated and the ATA register values are returned
1659 * whether the command completed successfully or not. If there
1660 * was no error, we use the following sense data:
1661 * sk = RECOVERED ERROR
1662 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1664 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1665 ((cdb[2] & 0x20) || need_sense))
1666 ata_gen_passthru_sense(qc);
1667 else if (qc->flags & ATA_QCFLAG_SENSE_VALID)
1668 cmd->result = SAM_STAT_CHECK_CONDITION;
1669 else if (need_sense)
1670 ata_gen_ata_sense(qc);
1672 cmd->result = SAM_STAT_GOOD;
1674 if (need_sense && !ap->ops->error_handler)
1675 ata_dump_status(ap->print_id, &qc->result_tf);
1681 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1682 * @dev: ATA device to which the command is addressed
1683 * @cmd: SCSI command to execute
1684 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1686 * Our ->queuecommand() function has decided that the SCSI
1687 * command issued can be directly translated into an ATA
1688 * command, rather than handled internally.
1690 * This function sets up an ata_queued_cmd structure for the
1691 * SCSI command, and sends that ata_queued_cmd to the hardware.
1693 * The xlat_func argument (actor) returns 0 if ready to execute
1694 * ATA command, else 1 to finish translation. If 1 is returned
1695 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1696 * to be set reflecting an error condition or clean (early)
1700 * spin_lock_irqsave(host lock)
1703 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1704 * needs to be deferred.
1706 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1707 ata_xlat_func_t xlat_func)
1709 struct ata_port *ap = dev->link->ap;
1710 struct ata_queued_cmd *qc;
1715 qc = ata_scsi_qc_new(dev, cmd);
1719 /* data is present; dma-map it */
1720 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1721 cmd->sc_data_direction == DMA_TO_DEVICE) {
1722 if (unlikely(scsi_bufflen(cmd) < 1)) {
1723 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
1727 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1729 qc->dma_dir = cmd->sc_data_direction;
1732 qc->complete_fn = ata_scsi_qc_complete;
1737 if (ap->ops->qc_defer) {
1738 if ((rc = ap->ops->qc_defer(qc)))
1742 /* select device, send command to hardware */
1751 DPRINTK("EXIT - early finish (good or error)\n");
1756 cmd->result = (DID_ERROR << 16);
1759 DPRINTK("EXIT - internal\n");
1764 DPRINTK("EXIT - defer\n");
1765 if (rc == ATA_DEFER_LINK)
1766 return SCSI_MLQUEUE_DEVICE_BUSY;
1768 return SCSI_MLQUEUE_HOST_BUSY;
1771 struct ata_scsi_args {
1772 struct ata_device *dev;
1774 struct scsi_cmnd *cmd;
1778 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1779 * @args: device IDENTIFY data / SCSI command of interest.
1780 * @actor: Callback hook for desired SCSI command simulator
1782 * Takes care of the hard work of simulating a SCSI command...
1783 * Mapping the response buffer, calling the command's handler,
1784 * and handling the handler's return value. This return value
1785 * indicates whether the handler wishes the SCSI command to be
1786 * completed successfully (0), or not (in which case cmd->result
1787 * and sense buffer are assumed to be set).
1790 * spin_lock_irqsave(host lock)
1792 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1793 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1796 struct scsi_cmnd *cmd = args->cmd;
1797 unsigned long flags;
1799 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
1801 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1802 rc = actor(args, ata_scsi_rbuf);
1804 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1805 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1807 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
1810 cmd->result = SAM_STAT_GOOD;
1814 * ata_scsiop_inq_std - Simulate INQUIRY command
1815 * @args: device IDENTIFY data / SCSI command of interest.
1816 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1818 * Returns standard device identification data associated
1819 * with non-VPD INQUIRY command output.
1822 * spin_lock_irqsave(host lock)
1824 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1826 static const u8 versions[] = {
1828 0x60, /* SAM-3 (no version claimed) */
1831 0x20, /* SBC-2 (no version claimed) */
1834 0x00 /* SPC-3 (no version claimed) */
1836 static const u8 versions_zbc[] = {
1838 0xA0, /* SAM-5 (no version claimed) */
1841 0x00, /* SBC-4 (no version claimed) */
1844 0xC0, /* SPC-5 (no version claimed) */
1853 0x5, /* claim SPC-3 version compatibility */
1863 /* set scsi removable (RMB) bit per ata bit, or if the
1864 * AHCI port says it's external (Hotplug-capable, eSATA).
1866 if (ata_id_removable(args->id) ||
1867 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL))
1870 if (args->dev->class == ATA_DEV_ZAC) {
1872 hdr[2] = 0x7; /* claim SPC-5 version compatibility */
1875 memcpy(rbuf, hdr, sizeof(hdr));
1876 memcpy(&rbuf[8], "ATA ", 8);
1877 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1879 /* From SAT, use last 2 words from fw rev unless they are spaces */
1880 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
1881 if (strncmp(&rbuf[32], " ", 4) == 0)
1882 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1884 if (rbuf[32] == 0 || rbuf[32] == ' ')
1885 memcpy(&rbuf[32], "n/a ", 4);
1887 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC)
1888 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc));
1890 memcpy(rbuf + 58, versions, sizeof(versions));
1896 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1897 * @args: device IDENTIFY data / SCSI command of interest.
1898 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1900 * Returns list of inquiry VPD pages available.
1903 * spin_lock_irqsave(host lock)
1905 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1907 int i, num_pages = 0;
1908 static const u8 pages[] = {
1909 0x00, /* page 0x00, this page */
1910 0x80, /* page 0x80, unit serial no page */
1911 0x83, /* page 0x83, device ident page */
1912 0x89, /* page 0x89, ata info page */
1913 0xb0, /* page 0xb0, block limits page */
1914 0xb1, /* page 0xb1, block device characteristics page */
1915 0xb2, /* page 0xb2, thin provisioning page */
1916 0xb6, /* page 0xb6, zoned block device characteristics */
1917 0xb9, /* page 0xb9, concurrent positioning ranges */
1920 for (i = 0; i < sizeof(pages); i++) {
1921 if (pages[i] == 0xb6 &&
1922 !(args->dev->flags & ATA_DFLAG_ZAC))
1924 rbuf[num_pages + 4] = pages[i];
1927 rbuf[3] = num_pages; /* number of supported VPD pages */
1932 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1933 * @args: device IDENTIFY data / SCSI command of interest.
1934 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1936 * Returns ATA device serial number.
1939 * spin_lock_irqsave(host lock)
1941 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
1943 static const u8 hdr[] = {
1945 0x80, /* this page code */
1947 ATA_ID_SERNO_LEN, /* page len */
1950 memcpy(rbuf, hdr, sizeof(hdr));
1951 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1952 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1957 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1958 * @args: device IDENTIFY data / SCSI command of interest.
1959 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1961 * Yields two logical unit device identification designators:
1962 * - vendor specific ASCII containing the ATA serial number
1963 * - SAT defined "t10 vendor id based" containing ASCII vendor
1964 * name ("ATA "), model and serial numbers.
1967 * spin_lock_irqsave(host lock)
1969 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
1971 const int sat_model_serial_desc_len = 68;
1974 rbuf[1] = 0x83; /* this page code */
1977 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1979 rbuf[num + 3] = ATA_ID_SERNO_LEN;
1981 ata_id_string(args->id, (unsigned char *) rbuf + num,
1982 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1983 num += ATA_ID_SERNO_LEN;
1985 /* SAT defined lu model and serial numbers descriptor */
1986 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1989 rbuf[num + 3] = sat_model_serial_desc_len;
1991 memcpy(rbuf + num, "ATA ", 8);
1993 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
1995 num += ATA_ID_PROD_LEN;
1996 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
1998 num += ATA_ID_SERNO_LEN;
2000 if (ata_id_has_wwn(args->id)) {
2001 /* SAT defined lu world wide name */
2002 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2005 rbuf[num + 3] = ATA_ID_WWN_LEN;
2007 ata_id_string(args->id, (unsigned char *) rbuf + num,
2008 ATA_ID_WWN, ATA_ID_WWN_LEN);
2009 num += ATA_ID_WWN_LEN;
2011 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2016 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2017 * @args: device IDENTIFY data / SCSI command of interest.
2018 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2020 * Yields SAT-specified ATA VPD page.
2023 * spin_lock_irqsave(host lock)
2025 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2027 rbuf[1] = 0x89; /* our page code */
2028 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2029 rbuf[3] = (0x238 & 0xff);
2031 memcpy(&rbuf[8], "linux ", 8);
2032 memcpy(&rbuf[16], "libata ", 16);
2033 memcpy(&rbuf[32], DRV_VERSION, 4);
2035 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2036 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */
2039 /* we don't store the ATA device signature, so we fake it */
2040 rbuf[38] = ATA_DRDY; /* really, this is Status reg */
2044 rbuf[56] = ATA_CMD_ID_ATA;
2046 memcpy(&rbuf[60], &args->id[0], 512);
2050 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2052 struct ata_device *dev = args->dev;
2056 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2059 * Optimal transfer length granularity.
2061 * This is always one physical block, but for disks with a smaller
2062 * logical than physical sector size we need to figure out what the
2065 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2066 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2069 * Optimal unmap granularity.
2071 * The ATA spec doesn't even know about a granularity or alignment
2072 * for the TRIM command. We can leave away most of the unmap related
2073 * VPD page entries, but we have specifify a granularity to signal
2074 * that we support some form of unmap - in thise case via WRITE SAME
2075 * with the unmap bit set.
2077 if (ata_id_has_trim(args->id)) {
2078 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM;
2080 if (dev->horkage & ATA_HORKAGE_MAX_TRIM_128M)
2081 max_blocks = 128 << (20 - SECTOR_SHIFT);
2083 put_unaligned_be64(max_blocks, &rbuf[36]);
2084 put_unaligned_be32(1, &rbuf[28]);
2090 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2092 int form_factor = ata_id_form_factor(args->id);
2093 int media_rotation_rate = ata_id_rotation_rate(args->id);
2094 u8 zoned = ata_id_zoned_cap(args->id);
2098 rbuf[4] = media_rotation_rate >> 8;
2099 rbuf[5] = media_rotation_rate;
2100 rbuf[7] = form_factor;
2102 rbuf[8] = (zoned << 4);
2107 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2109 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2112 rbuf[5] = 1 << 6; /* TPWS */
2117 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf)
2120 * zbc-r05 SCSI Zoned Block device characteristics VPD page
2126 * URSWRZ bit is only meaningful for host-managed ZAC drives
2128 if (args->dev->zac_zoned_cap & 1)
2130 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]);
2131 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]);
2132 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]);
2137 static unsigned int ata_scsiop_inq_b9(struct ata_scsi_args *args, u8 *rbuf)
2139 struct ata_cpr_log *cpr_log = args->dev->cpr_log;
2140 u8 *desc = &rbuf[64];
2143 /* SCSI Concurrent Positioning Ranges VPD page: SBC-5 rev 1 or later */
2145 put_unaligned_be16(64 + (int)cpr_log->nr_cpr * 32 - 4, &rbuf[3]);
2147 for (i = 0; i < cpr_log->nr_cpr; i++, desc += 32) {
2148 desc[0] = cpr_log->cpr[i].num;
2149 desc[1] = cpr_log->cpr[i].num_storage_elements;
2150 put_unaligned_be64(cpr_log->cpr[i].start_lba, &desc[8]);
2151 put_unaligned_be64(cpr_log->cpr[i].num_lbas, &desc[16]);
2158 * modecpy - Prepare response for MODE SENSE
2159 * @dest: output buffer
2160 * @src: data being copied
2161 * @n: length of mode page
2162 * @changeable: whether changeable parameters are requested
2164 * Generate a generic MODE SENSE page for either current or changeable
2170 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2173 memcpy(dest, src, 2);
2174 memset(dest + 2, 0, n - 2);
2176 memcpy(dest, src, n);
2181 * ata_msense_caching - Simulate MODE SENSE caching info page
2182 * @id: device IDENTIFY data
2183 * @buf: output buffer
2184 * @changeable: whether changeable parameters are requested
2186 * Generate a caching info page, which conditionally indicates
2187 * write caching to the SCSI layer, depending on device
2193 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2195 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2197 buf[2] |= (1 << 2); /* ata_mselect_caching() */
2199 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */
2200 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */
2202 return sizeof(def_cache_mpage);
2206 * ata_msense_control - Simulate MODE SENSE control mode page
2207 * @dev: ATA device of interest
2208 * @buf: output buffer
2209 * @changeable: whether changeable parameters are requested
2211 * Generate a generic MODE SENSE control mode page.
2216 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf,
2219 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2221 buf[2] |= (1 << 2); /* ata_mselect_control() */
2223 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
2225 buf[2] |= (d_sense << 2); /* descriptor format sense data */
2227 return sizeof(def_control_mpage);
2231 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2232 * @buf: output buffer
2233 * @changeable: whether changeable parameters are requested
2235 * Generate a generic MODE SENSE r/w error recovery page.
2240 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2242 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2244 return sizeof(def_rw_recovery_mpage);
2248 * We can turn this into a real blacklist if it's needed, for now just
2249 * blacklist any Maxtor BANC1G10 revision firmware
2251 static int ata_dev_supports_fua(u16 *id)
2253 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2257 if (!ata_id_has_fua(id))
2260 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2261 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2263 if (strcmp(model, "Maxtor"))
2265 if (strcmp(fw, "BANC1G10"))
2268 return 0; /* blacklisted */
2272 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2273 * @args: device IDENTIFY data / SCSI command of interest.
2274 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2276 * Simulate MODE SENSE commands. Assume this is invoked for direct
2277 * access devices (e.g. disks) only. There should be no block
2278 * descriptor for other device types.
2281 * spin_lock_irqsave(host lock)
2283 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2285 struct ata_device *dev = args->dev;
2286 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2287 static const u8 sat_blk_desc[] = {
2288 0, 0, 0, 0, /* number of blocks: sat unspecified */
2290 0, 0x2, 0x0 /* block length: 512 bytes */
2293 unsigned int ebd, page_control, six_byte;
2294 u8 dpofua, bp = 0xff;
2299 six_byte = (scsicmd[0] == MODE_SENSE);
2300 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2302 * LLBA bit in msense(10) ignored (compliant)
2305 page_control = scsicmd[2] >> 6;
2306 switch (page_control) {
2307 case 0: /* current */
2308 case 1: /* changeable */
2309 case 2: /* defaults */
2310 break; /* supported */
2312 goto saving_not_supp;
2320 p += 4 + (ebd ? 8 : 0);
2322 p += 8 + (ebd ? 8 : 0);
2324 pg = scsicmd[2] & 0x3f;
2327 * No mode subpages supported (yet) but asking for _all_
2328 * subpages may be valid
2330 if (spg && (spg != ALL_SUB_MPAGES)) {
2336 case RW_RECOVERY_MPAGE:
2337 p += ata_msense_rw_recovery(p, page_control == 1);
2341 p += ata_msense_caching(args->id, p, page_control == 1);
2345 p += ata_msense_control(args->dev, p, page_control == 1);
2349 p += ata_msense_rw_recovery(p, page_control == 1);
2350 p += ata_msense_caching(args->id, p, page_control == 1);
2351 p += ata_msense_control(args->dev, p, page_control == 1);
2354 default: /* invalid page code */
2360 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2361 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2365 rbuf[0] = p - rbuf - 1;
2368 rbuf[3] = sizeof(sat_blk_desc);
2369 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2372 unsigned int output_len = p - rbuf - 2;
2374 rbuf[0] = output_len >> 8;
2375 rbuf[1] = output_len;
2378 rbuf[7] = sizeof(sat_blk_desc);
2379 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2385 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp);
2389 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2390 /* "Saving parameters not supported" */
2395 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2396 * @args: device IDENTIFY data / SCSI command of interest.
2397 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2399 * Simulate READ CAPACITY commands.
2404 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2406 struct ata_device *dev = args->dev;
2407 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2408 u32 sector_size; /* physical sector size in bytes */
2412 sector_size = ata_id_logical_sector_size(dev->id);
2413 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2414 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2418 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2419 if (last_lba >= 0xffffffffULL)
2420 last_lba = 0xffffffff;
2422 /* sector count, 32-bit */
2423 rbuf[0] = last_lba >> (8 * 3);
2424 rbuf[1] = last_lba >> (8 * 2);
2425 rbuf[2] = last_lba >> (8 * 1);
2429 rbuf[4] = sector_size >> (8 * 3);
2430 rbuf[5] = sector_size >> (8 * 2);
2431 rbuf[6] = sector_size >> (8 * 1);
2432 rbuf[7] = sector_size;
2434 /* sector count, 64-bit */
2435 rbuf[0] = last_lba >> (8 * 7);
2436 rbuf[1] = last_lba >> (8 * 6);
2437 rbuf[2] = last_lba >> (8 * 5);
2438 rbuf[3] = last_lba >> (8 * 4);
2439 rbuf[4] = last_lba >> (8 * 3);
2440 rbuf[5] = last_lba >> (8 * 2);
2441 rbuf[6] = last_lba >> (8 * 1);
2445 rbuf[ 8] = sector_size >> (8 * 3);
2446 rbuf[ 9] = sector_size >> (8 * 2);
2447 rbuf[10] = sector_size >> (8 * 1);
2448 rbuf[11] = sector_size;
2451 rbuf[13] = log2_per_phys;
2452 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2453 rbuf[15] = lowest_aligned;
2455 if (ata_id_has_trim(args->id) &&
2456 !(dev->horkage & ATA_HORKAGE_NOTRIM)) {
2457 rbuf[14] |= 0x80; /* LBPME */
2459 if (ata_id_has_zero_after_trim(args->id) &&
2460 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) {
2461 ata_dev_info(dev, "Enabling discard_zeroes_data\n");
2462 rbuf[14] |= 0x40; /* LBPRZ */
2465 if (ata_id_zoned_cap(args->id) ||
2466 args->dev->class == ATA_DEV_ZAC)
2467 rbuf[12] = (1 << 4); /* RC_BASIS */
2473 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2474 * @args: device IDENTIFY data / SCSI command of interest.
2475 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2477 * Simulate REPORT LUNS command.
2480 * spin_lock_irqsave(host lock)
2482 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2485 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2490 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2492 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2493 /* FIXME: not quite right; we don't want the
2494 * translation of taskfile registers into
2495 * a sense descriptors, since that's only
2496 * correct for ATA, not ATAPI
2498 ata_gen_passthru_sense(qc);
2504 /* is it pointless to prefer PIO for "safety reasons"? */
2505 static inline int ata_pio_use_silly(struct ata_port *ap)
2507 return (ap->flags & ATA_FLAG_PIO_DMA);
2510 static void atapi_request_sense(struct ata_queued_cmd *qc)
2512 struct ata_port *ap = qc->ap;
2513 struct scsi_cmnd *cmd = qc->scsicmd;
2515 DPRINTK("ATAPI request sense\n");
2517 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2519 #ifdef CONFIG_ATA_SFF
2520 if (ap->ops->sff_tf_read)
2521 ap->ops->sff_tf_read(ap, &qc->tf);
2524 /* fill these in, for the case where they are -not- overwritten */
2525 cmd->sense_buffer[0] = 0x70;
2526 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2530 /* setup sg table and init transfer direction */
2531 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2532 ata_sg_init(qc, &qc->sgent, 1);
2533 qc->dma_dir = DMA_FROM_DEVICE;
2535 memset(&qc->cdb, 0, qc->dev->cdb_len);
2536 qc->cdb[0] = REQUEST_SENSE;
2537 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2539 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2540 qc->tf.command = ATA_CMD_PACKET;
2542 if (ata_pio_use_silly(ap)) {
2543 qc->tf.protocol = ATAPI_PROT_DMA;
2544 qc->tf.feature |= ATAPI_PKT_DMA;
2546 qc->tf.protocol = ATAPI_PROT_PIO;
2547 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2550 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2552 qc->complete_fn = atapi_sense_complete;
2560 * ATAPI devices typically report zero for their SCSI version, and sometimes
2561 * deviate from the spec WRT response data format. If SCSI version is
2562 * reported as zero like normal, then we make the following fixups:
2563 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a
2565 * 2) Ensure response data format / ATAPI information are always correct.
2567 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd)
2571 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2576 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2579 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2581 struct scsi_cmnd *cmd = qc->scsicmd;
2582 unsigned int err_mask = qc->err_mask;
2584 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2586 /* handle completion from new EH */
2587 if (unlikely(qc->ap->ops->error_handler &&
2588 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2590 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2591 /* FIXME: not quite right; we don't want the
2592 * translation of taskfile registers into a
2593 * sense descriptors, since that's only
2594 * correct for ATA, not ATAPI
2596 ata_gen_passthru_sense(qc);
2599 /* SCSI EH automatically locks door if sdev->locked is
2600 * set. Sometimes door lock request continues to
2601 * fail, for example, when no media is present. This
2602 * creates a loop - SCSI EH issues door lock which
2603 * fails and gets invoked again to acquire sense data
2604 * for the failed command.
2606 * If door lock fails, always clear sdev->locked to
2607 * avoid this infinite loop.
2609 * This may happen before SCSI scan is complete. Make
2610 * sure qc->dev->sdev isn't NULL before dereferencing.
2612 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2613 qc->dev->sdev->locked = 0;
2615 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2620 /* successful completion or old EH failure path */
2621 if (unlikely(err_mask & AC_ERR_DEV)) {
2622 cmd->result = SAM_STAT_CHECK_CONDITION;
2623 atapi_request_sense(qc);
2625 } else if (unlikely(err_mask)) {
2626 /* FIXME: not quite right; we don't want the
2627 * translation of taskfile registers into
2628 * a sense descriptors, since that's only
2629 * correct for ATA, not ATAPI
2631 ata_gen_passthru_sense(qc);
2633 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0)
2634 atapi_fixup_inquiry(cmd);
2635 cmd->result = SAM_STAT_GOOD;
2641 * atapi_xlat - Initialize PACKET taskfile
2642 * @qc: command structure to be initialized
2645 * spin_lock_irqsave(host lock)
2648 * Zero on success, non-zero on failure.
2650 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2652 struct scsi_cmnd *scmd = qc->scsicmd;
2653 struct ata_device *dev = qc->dev;
2654 int nodata = (scmd->sc_data_direction == DMA_NONE);
2655 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2656 unsigned int nbytes;
2658 memset(qc->cdb, 0, dev->cdb_len);
2659 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2661 qc->complete_fn = atapi_qc_complete;
2663 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2664 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2665 qc->tf.flags |= ATA_TFLAG_WRITE;
2666 DPRINTK("direction: write\n");
2669 qc->tf.command = ATA_CMD_PACKET;
2670 ata_qc_set_pc_nbytes(qc);
2672 /* check whether ATAPI DMA is safe */
2673 if (!nodata && !using_pio && atapi_check_dma(qc))
2676 /* Some controller variants snoop this value for Packet
2677 * transfers to do state machine and FIFO management. Thus we
2678 * want to set it properly, and for DMA where it is
2679 * effectively meaningless.
2681 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2683 /* Most ATAPI devices which honor transfer chunk size don't
2684 * behave according to the spec when odd chunk size which
2685 * matches the transfer length is specified. If the number of
2686 * bytes to transfer is 2n+1. According to the spec, what
2687 * should happen is to indicate that 2n+1 is going to be
2688 * transferred and transfer 2n+2 bytes where the last byte is
2691 * In practice, this doesn't happen. ATAPI devices first
2692 * indicate and transfer 2n bytes and then indicate and
2693 * transfer 2 bytes where the last byte is padding.
2695 * This inconsistency confuses several controllers which
2696 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2697 * These controllers use actual number of transferred bytes to
2698 * update DMA pointer and transfer of 4n+2 bytes make those
2699 * controller push DMA pointer by 4n+4 bytes because SATA data
2700 * FISes are aligned to 4 bytes. This causes data corruption
2701 * and buffer overrun.
2703 * Always setting nbytes to even number solves this problem
2704 * because then ATAPI devices don't have to split data at 2n
2710 qc->tf.lbam = (nbytes & 0xFF);
2711 qc->tf.lbah = (nbytes >> 8);
2714 qc->tf.protocol = ATAPI_PROT_NODATA;
2716 qc->tf.protocol = ATAPI_PROT_PIO;
2719 qc->tf.protocol = ATAPI_PROT_DMA;
2720 qc->tf.feature |= ATAPI_PKT_DMA;
2722 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2723 (scmd->sc_data_direction != DMA_TO_DEVICE))
2724 /* some SATA bridges need us to indicate data xfer direction */
2725 qc->tf.feature |= ATAPI_DMADIR;
2729 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2730 as ATAPI tape drives don't get this right otherwise */
2734 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2736 if (!sata_pmp_attached(ap)) {
2737 if (likely(devno >= 0 &&
2738 devno < ata_link_max_devices(&ap->link)))
2739 return &ap->link.device[devno];
2741 if (likely(devno >= 0 &&
2742 devno < ap->nr_pmp_links))
2743 return &ap->pmp_link[devno].device[0];
2749 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2750 const struct scsi_device *scsidev)
2754 /* skip commands not addressed to targets we simulate */
2755 if (!sata_pmp_attached(ap)) {
2756 if (unlikely(scsidev->channel || scsidev->lun))
2758 devno = scsidev->id;
2760 if (unlikely(scsidev->id || scsidev->lun))
2762 devno = scsidev->channel;
2765 return ata_find_dev(ap, devno);
2769 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2770 * @ap: ATA port to which the device is attached
2771 * @scsidev: SCSI device from which we derive the ATA device
2773 * Given various information provided in struct scsi_cmnd,
2774 * map that onto an ATA bus, and using that mapping
2775 * determine which ata_device is associated with the
2776 * SCSI command to be sent.
2779 * spin_lock_irqsave(host lock)
2782 * Associated ATA device, or %NULL if not found.
2785 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2787 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2789 if (unlikely(!dev || !ata_dev_enabled(dev)))
2796 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2797 * @byte1: Byte 1 from pass-thru CDB.
2800 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2803 ata_scsi_map_proto(u8 byte1)
2805 switch((byte1 & 0x1e) >> 1) {
2806 case 3: /* Non-data */
2807 return ATA_PROT_NODATA;
2810 case 10: /* UDMA Data-in */
2811 case 11: /* UDMA Data-Out */
2812 return ATA_PROT_DMA;
2814 case 4: /* PIO Data-in */
2815 case 5: /* PIO Data-out */
2816 return ATA_PROT_PIO;
2818 case 12: /* FPDMA */
2819 return ATA_PROT_NCQ;
2821 case 0: /* Hard Reset */
2823 case 8: /* Device Diagnostic */
2824 case 9: /* Device Reset */
2825 case 7: /* DMA Queued */
2826 case 15: /* Return Response Info */
2827 default: /* Reserved */
2831 return ATA_PROT_UNKNOWN;
2835 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2836 * @qc: command structure to be initialized
2838 * Handles either 12, 16, or 32-byte versions of the CDB.
2841 * Zero on success, non-zero on failure.
2843 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2845 struct ata_taskfile *tf = &(qc->tf);
2846 struct scsi_cmnd *scmd = qc->scsicmd;
2847 struct ata_device *dev = qc->dev;
2848 const u8 *cdb = scmd->cmnd;
2852 /* 7Fh variable length cmd means a ata pass-thru(32) */
2853 if (cdb[0] == VARIABLE_LENGTH_CMD)
2856 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]);
2857 if (tf->protocol == ATA_PROT_UNKNOWN) {
2862 if ((cdb[2 + cdb_offset] & 0x3) == 0) {
2864 * When T_LENGTH is zero (No data is transferred), dir should
2867 if (scmd->sc_data_direction != DMA_NONE) {
2868 fp = 2 + cdb_offset;
2872 if (ata_is_ncq(tf->protocol))
2873 tf->protocol = ATA_PROT_NCQ_NODATA;
2877 tf->flags |= ATA_TFLAG_LBA;
2880 * 12 and 16 byte CDBs use different offsets to
2881 * provide the various register values.
2883 if (cdb[0] == ATA_16) {
2885 * 16-byte CDB - may contain extended commands.
2887 * If that is the case, copy the upper byte register values.
2889 if (cdb[1] & 0x01) {
2890 tf->hob_feature = cdb[3];
2891 tf->hob_nsect = cdb[5];
2892 tf->hob_lbal = cdb[7];
2893 tf->hob_lbam = cdb[9];
2894 tf->hob_lbah = cdb[11];
2895 tf->flags |= ATA_TFLAG_LBA48;
2897 tf->flags &= ~ATA_TFLAG_LBA48;
2900 * Always copy low byte, device and command registers.
2902 tf->feature = cdb[4];
2907 tf->device = cdb[13];
2908 tf->command = cdb[14];
2909 } else if (cdb[0] == ATA_12) {
2911 * 12-byte CDB - incapable of extended commands.
2913 tf->flags &= ~ATA_TFLAG_LBA48;
2915 tf->feature = cdb[3];
2920 tf->device = cdb[8];
2921 tf->command = cdb[9];
2924 * 32-byte CDB - may contain extended command fields.
2926 * If that is the case, copy the upper byte register values.
2928 if (cdb[10] & 0x01) {
2929 tf->hob_feature = cdb[20];
2930 tf->hob_nsect = cdb[22];
2931 tf->hob_lbal = cdb[16];
2932 tf->hob_lbam = cdb[15];
2933 tf->hob_lbah = cdb[14];
2934 tf->flags |= ATA_TFLAG_LBA48;
2936 tf->flags &= ~ATA_TFLAG_LBA48;
2938 tf->feature = cdb[21];
2939 tf->nsect = cdb[23];
2943 tf->device = cdb[24];
2944 tf->command = cdb[25];
2945 tf->auxiliary = get_unaligned_be32(&cdb[28]);
2948 /* For NCQ commands copy the tag value */
2949 if (ata_is_ncq(tf->protocol))
2950 tf->nsect = qc->hw_tag << 3;
2952 /* enforce correct master/slave bit */
2953 tf->device = dev->devno ?
2954 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2956 switch (tf->command) {
2957 /* READ/WRITE LONG use a non-standard sect_size */
2958 case ATA_CMD_READ_LONG:
2959 case ATA_CMD_READ_LONG_ONCE:
2960 case ATA_CMD_WRITE_LONG:
2961 case ATA_CMD_WRITE_LONG_ONCE:
2962 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) {
2966 qc->sect_size = scsi_bufflen(scmd);
2969 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2970 case ATA_CMD_CFA_WRITE_NE:
2971 case ATA_CMD_CFA_TRANS_SECT:
2972 case ATA_CMD_CFA_WRITE_MULT_NE:
2973 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2975 case ATA_CMD_READ_EXT:
2976 case ATA_CMD_READ_QUEUED:
2977 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2978 case ATA_CMD_FPDMA_READ:
2979 case ATA_CMD_READ_MULTI:
2980 case ATA_CMD_READ_MULTI_EXT:
2981 case ATA_CMD_PIO_READ:
2982 case ATA_CMD_PIO_READ_EXT:
2983 case ATA_CMD_READ_STREAM_DMA_EXT:
2984 case ATA_CMD_READ_STREAM_EXT:
2985 case ATA_CMD_VERIFY:
2986 case ATA_CMD_VERIFY_EXT:
2988 case ATA_CMD_WRITE_EXT:
2989 case ATA_CMD_WRITE_FUA_EXT:
2990 case ATA_CMD_WRITE_QUEUED:
2991 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
2992 case ATA_CMD_FPDMA_WRITE:
2993 case ATA_CMD_WRITE_MULTI:
2994 case ATA_CMD_WRITE_MULTI_EXT:
2995 case ATA_CMD_WRITE_MULTI_FUA_EXT:
2996 case ATA_CMD_PIO_WRITE:
2997 case ATA_CMD_PIO_WRITE_EXT:
2998 case ATA_CMD_WRITE_STREAM_DMA_EXT:
2999 case ATA_CMD_WRITE_STREAM_EXT:
3000 qc->sect_size = scmd->device->sector_size;
3003 /* Everything else uses 512 byte "sectors" */
3005 qc->sect_size = ATA_SECT_SIZE;
3009 * Set flags so that all registers will be written, pass on
3010 * write indication (used for PIO/DMA setup), result TF is
3011 * copied back and we don't whine too much about its failure.
3013 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3014 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3015 tf->flags |= ATA_TFLAG_WRITE;
3017 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3020 * Set transfer length.
3022 * TODO: find out if we need to do more here to
3023 * cover scatter/gather case.
3025 ata_qc_set_pc_nbytes(qc);
3027 /* We may not issue DMA commands if no DMA mode is set */
3028 if (tf->protocol == ATA_PROT_DMA && !ata_dma_enabled(dev)) {
3033 /* We may not issue NCQ commands to devices not supporting NCQ */
3034 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) {
3039 /* sanity check for pio multi commands */
3040 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) {
3045 if (is_multi_taskfile(tf)) {
3046 unsigned int multi_count = 1 << (cdb[1] >> 5);
3048 /* compare the passed through multi_count
3049 * with the cached multi_count of libata
3051 if (multi_count != dev->multi_count)
3052 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3057 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3058 * SET_FEATURES - XFER MODE must be preceded/succeeded
3059 * by an update to hardware-specific registers for each
3060 * controller (i.e. the reason for ->set_piomode(),
3061 * ->set_dmamode(), and ->post_set_mode() hooks).
3063 if (tf->command == ATA_CMD_SET_FEATURES &&
3064 tf->feature == SETFEATURES_XFER) {
3065 fp = (cdb[0] == ATA_16) ? 4 : 3;
3070 * Filter TPM commands by default. These provide an
3071 * essentially uncontrolled encrypted "back door" between
3072 * applications and the disk. Set libata.allow_tpm=1 if you
3073 * have a real reason for wanting to use them. This ensures
3074 * that installed software cannot easily mess stuff up without
3075 * user intent. DVR type users will probably ship with this enabled
3076 * for movie content management.
3078 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3079 * for this and should do in future but that it is not sufficient as
3080 * DCS is an optional feature set. Thus we also do the software filter
3081 * so that we comply with the TC consortium stated goal that the user
3082 * can turn off TC features of their system.
3084 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) {
3085 fp = (cdb[0] == ATA_16) ? 14 : 9;
3092 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff);
3097 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim
3098 * @cmd: SCSI command being translated
3099 * @trmax: Maximum number of entries that will fit in sector_size bytes.
3100 * @sector: Starting sector
3101 * @count: Total Range of request in logical sectors
3103 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted
3106 * Upto 64 entries of the format:
3107 * 63:48 Range Length
3110 * Range Length of 0 is ignored.
3111 * LBA's should be sorted order and not overlap.
3113 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET
3115 * Return: Number of bytes copied into sglist.
3117 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax,
3118 u64 sector, u32 count)
3120 struct scsi_device *sdp = cmd->device;
3121 size_t len = sdp->sector_size;
3125 unsigned long flags;
3127 WARN_ON(len > ATA_SCSI_RBUF_SIZE);
3129 if (len > ATA_SCSI_RBUF_SIZE)
3130 len = ATA_SCSI_RBUF_SIZE;
3132 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
3133 buf = ((void *)ata_scsi_rbuf);
3134 memset(buf, 0, len);
3136 u64 entry = sector |
3137 ((u64)(count > 0xffff ? 0xffff : count) << 48);
3138 buf[i++] = __cpu_to_le64(entry);
3139 if (count <= 0xffff)
3144 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len);
3145 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
3151 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same
3152 * @qc: Command to be translated
3154 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or
3155 * an SCT Write Same command.
3156 * Based on WRITE SAME has the UNMAP flag:
3158 * - When set translate to DSM TRIM
3159 * - When clear translate to SCT Write Same
3161 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3163 struct ata_taskfile *tf = &qc->tf;
3164 struct scsi_cmnd *scmd = qc->scsicmd;
3165 struct scsi_device *sdp = scmd->device;
3166 size_t len = sdp->sector_size;
3167 struct ata_device *dev = qc->dev;
3168 const u8 *cdb = scmd->cmnd;
3171 const u32 trmax = len >> 3;
3175 u8 unmap = cdb[1] & 0x8;
3177 /* we may not issue DMA commands if no DMA mode is set */
3178 if (unlikely(!ata_dma_enabled(dev)))
3179 goto invalid_opcode;
3182 * We only allow sending this command through the block layer,
3183 * as it modifies the DATA OUT buffer, which would corrupt user
3184 * memory for SG_IO commands.
3186 if (unlikely(blk_rq_is_passthrough(scsi_cmd_to_rq(scmd))))
3187 goto invalid_opcode;
3189 if (unlikely(scmd->cmd_len < 16)) {
3193 scsi_16_lba_len(cdb, &block, &n_block);
3196 (dev->horkage & ATA_HORKAGE_NOTRIM) ||
3197 !ata_id_has_trim(dev->id)) {
3202 /* If the request is too large the cmd is invalid */
3203 if (n_block > 0xffff * trmax) {
3209 * WRITE SAME always has a sector sized buffer as payload, this
3210 * should never be a multiple entry S/G list.
3212 if (!scsi_sg_count(scmd))
3213 goto invalid_param_len;
3216 * size must match sector size in bytes
3217 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count)
3218 * is defined as number of 512 byte blocks to be transferred.
3221 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block);
3223 goto invalid_param_len;
3225 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3226 /* Newer devices support queued TRIM commands */
3227 tf->protocol = ATA_PROT_NCQ;
3228 tf->command = ATA_CMD_FPDMA_SEND;
3229 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3230 tf->nsect = qc->hw_tag << 3;
3231 tf->hob_feature = (size / 512) >> 8;
3232 tf->feature = size / 512;
3236 tf->protocol = ATA_PROT_DMA;
3237 tf->hob_feature = 0;
3238 tf->feature = ATA_DSM_TRIM;
3239 tf->hob_nsect = (size / 512) >> 8;
3240 tf->nsect = size / 512;
3241 tf->command = ATA_CMD_DSM;
3244 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3247 ata_qc_set_pc_nbytes(qc);
3252 ata_scsi_set_invalid_field(dev, scmd, fp, bp);
3255 /* "Parameter list length error" */
3256 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3259 /* "Invalid command operation code" */
3260 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0);
3265 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN
3266 * @args: device MAINTENANCE_IN data / SCSI command of interest.
3267 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
3269 * Yields a subset to satisfy scsi_report_opcode()
3272 * spin_lock_irqsave(host lock)
3274 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf)
3276 struct ata_device *dev = args->dev;
3277 u8 *cdb = args->cmd->cmnd;
3279 unsigned int err = 0;
3282 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]);
3291 case SERVICE_ACTION_IN_16:
3294 case SYNCHRONIZE_CACHE:
3298 case TEST_UNIT_READY:
3299 case SEND_DIAGNOSTIC:
3300 case MAINTENANCE_IN:
3312 case MODE_SELECT_10:
3318 if (ata_id_zoned_cap(dev->id) ||
3319 dev->class == ATA_DEV_ZAC)
3322 case SECURITY_PROTOCOL_IN:
3323 case SECURITY_PROTOCOL_OUT:
3324 if (dev->flags & ATA_DFLAG_TRUSTED)
3331 rbuf[1] = supported; /* supported */
3336 * ata_scsi_report_zones_complete - convert ATA output
3337 * @qc: command structure returning the data
3339 * Convert T-13 little-endian field representation into
3340 * T-10 big-endian field representation.
3343 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc)
3345 struct scsi_cmnd *scmd = qc->scsicmd;
3346 struct sg_mapping_iter miter;
3347 unsigned long flags;
3348 unsigned int bytes = 0;
3350 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd),
3351 SG_MITER_TO_SG | SG_MITER_ATOMIC);
3353 local_irq_save(flags);
3354 while (sg_miter_next(&miter)) {
3355 unsigned int offset = 0;
3360 u64 max_lba, opt_lba;
3363 /* Swizzle header */
3365 list_length = get_unaligned_le32(&hdr[0]);
3366 same = get_unaligned_le16(&hdr[4]);
3367 max_lba = get_unaligned_le64(&hdr[8]);
3368 opt_lba = get_unaligned_le64(&hdr[16]);
3369 put_unaligned_be32(list_length, &hdr[0]);
3370 hdr[4] = same & 0xf;
3371 put_unaligned_be64(max_lba, &hdr[8]);
3372 put_unaligned_be64(opt_lba, &hdr[16]);
3376 while (offset < miter.length) {
3378 u8 cond, type, non_seq, reset;
3379 u64 size, start, wp;
3381 /* Swizzle zone descriptor */
3382 rec = miter.addr + offset;
3383 type = rec[0] & 0xf;
3384 cond = (rec[1] >> 4) & 0xf;
3385 non_seq = (rec[1] & 2);
3386 reset = (rec[1] & 1);
3387 size = get_unaligned_le64(&rec[8]);
3388 start = get_unaligned_le64(&rec[16]);
3389 wp = get_unaligned_le64(&rec[24]);
3391 rec[1] = (cond << 4) | non_seq | reset;
3392 put_unaligned_be64(size, &rec[8]);
3393 put_unaligned_be64(start, &rec[16]);
3394 put_unaligned_be64(wp, &rec[24]);
3395 WARN_ON(offset + 64 > miter.length);
3400 sg_miter_stop(&miter);
3401 local_irq_restore(flags);
3403 ata_scsi_qc_complete(qc);
3406 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc)
3408 struct ata_taskfile *tf = &qc->tf;
3409 struct scsi_cmnd *scmd = qc->scsicmd;
3410 const u8 *cdb = scmd->cmnd;
3411 u16 sect, fp = (u16)-1;
3412 u8 sa, options, bp = 0xff;
3416 if (unlikely(scmd->cmd_len < 16)) {
3417 ata_dev_warn(qc->dev, "invalid cdb length %d\n",
3422 scsi_16_lba_len(cdb, &block, &n_block);
3423 if (n_block != scsi_bufflen(scmd)) {
3424 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n",
3425 n_block, scsi_bufflen(scmd));
3426 goto invalid_param_len;
3429 if (sa != ZI_REPORT_ZONES) {
3430 ata_dev_warn(qc->dev, "invalid service action %d\n", sa);
3435 * ZAC allows only for transfers in 512 byte blocks,
3436 * and uses a 16 bit value for the transfer count.
3438 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) {
3439 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block);
3440 goto invalid_param_len;
3442 sect = n_block / 512;
3443 options = cdb[14] & 0xbf;
3445 if (ata_ncq_enabled(qc->dev) &&
3446 ata_fpdma_zac_mgmt_in_supported(qc->dev)) {
3447 tf->protocol = ATA_PROT_NCQ;
3448 tf->command = ATA_CMD_FPDMA_RECV;
3449 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f;
3450 tf->nsect = qc->hw_tag << 3;
3451 tf->feature = sect & 0xff;
3452 tf->hob_feature = (sect >> 8) & 0xff;
3453 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8);
3455 tf->command = ATA_CMD_ZAC_MGMT_IN;
3456 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES;
3457 tf->protocol = ATA_PROT_DMA;
3458 tf->hob_feature = options;
3459 tf->hob_nsect = (sect >> 8) & 0xff;
3460 tf->nsect = sect & 0xff;
3462 tf->device = ATA_LBA;
3463 tf->lbah = (block >> 16) & 0xff;
3464 tf->lbam = (block >> 8) & 0xff;
3465 tf->lbal = block & 0xff;
3466 tf->hob_lbah = (block >> 40) & 0xff;
3467 tf->hob_lbam = (block >> 32) & 0xff;
3468 tf->hob_lbal = (block >> 24) & 0xff;
3470 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3471 qc->flags |= ATA_QCFLAG_RESULT_TF;
3473 ata_qc_set_pc_nbytes(qc);
3475 qc->complete_fn = ata_scsi_report_zones_complete;
3480 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
3484 /* "Parameter list length error" */
3485 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3489 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc)
3491 struct ata_taskfile *tf = &qc->tf;
3492 struct scsi_cmnd *scmd = qc->scsicmd;
3493 struct ata_device *dev = qc->dev;
3494 const u8 *cdb = scmd->cmnd;
3500 if (unlikely(scmd->cmd_len < 16)) {
3506 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) &&
3507 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) {
3512 scsi_16_lba_len(cdb, &block, &n_block);
3515 * ZAC MANAGEMENT OUT doesn't define any length
3517 goto invalid_param_len;
3520 all = cdb[14] & 0x1;
3523 * Ignore the block address (zone ID) as defined by ZBC.
3526 } else if (block >= dev->n_sectors) {
3528 * Block must be a valid zone ID (a zone start LBA).
3534 if (ata_ncq_enabled(qc->dev) &&
3535 ata_fpdma_zac_mgmt_out_supported(qc->dev)) {
3536 tf->protocol = ATA_PROT_NCQ_NODATA;
3537 tf->command = ATA_CMD_NCQ_NON_DATA;
3538 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT;
3539 tf->nsect = qc->hw_tag << 3;
3540 tf->auxiliary = sa | ((u16)all << 8);
3542 tf->protocol = ATA_PROT_NODATA;
3543 tf->command = ATA_CMD_ZAC_MGMT_OUT;
3545 tf->hob_feature = all;
3547 tf->lbah = (block >> 16) & 0xff;
3548 tf->lbam = (block >> 8) & 0xff;
3549 tf->lbal = block & 0xff;
3550 tf->hob_lbah = (block >> 40) & 0xff;
3551 tf->hob_lbam = (block >> 32) & 0xff;
3552 tf->hob_lbal = (block >> 24) & 0xff;
3553 tf->device = ATA_LBA;
3554 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3559 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
3562 /* "Parameter list length error" */
3563 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3568 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3569 * @qc: Storage for translated ATA taskfile
3570 * @buf: input buffer
3571 * @len: number of valid bytes in the input buffer
3572 * @fp: out parameter for the failed field on error
3574 * Prepare a taskfile to modify caching information for the device.
3579 static int ata_mselect_caching(struct ata_queued_cmd *qc,
3580 const u8 *buf, int len, u16 *fp)
3582 struct ata_taskfile *tf = &qc->tf;
3583 struct ata_device *dev = qc->dev;
3584 u8 mpage[CACHE_MPAGE_LEN];
3589 * The first two bytes of def_cache_mpage are a header, so offsets
3590 * in mpage are off by 2 compared to buf. Same for len.
3593 if (len != CACHE_MPAGE_LEN - 2) {
3594 *fp = min(len, CACHE_MPAGE_LEN - 2);
3598 wce = buf[0] & (1 << 2);
3601 * Check that read-only bits are not modified.
3603 ata_msense_caching(dev->id, mpage, false);
3604 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) {
3607 if (mpage[i + 2] != buf[i]) {
3613 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3614 tf->protocol = ATA_PROT_NODATA;
3616 tf->command = ATA_CMD_SET_FEATURES;
3617 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3622 * ata_mselect_control - Simulate MODE SELECT for control page
3623 * @qc: Storage for translated ATA taskfile
3624 * @buf: input buffer
3625 * @len: number of valid bytes in the input buffer
3626 * @fp: out parameter for the failed field on error
3628 * Prepare a taskfile to modify caching information for the device.
3633 static int ata_mselect_control(struct ata_queued_cmd *qc,
3634 const u8 *buf, int len, u16 *fp)
3636 struct ata_device *dev = qc->dev;
3637 u8 mpage[CONTROL_MPAGE_LEN];
3642 * The first two bytes of def_control_mpage are a header, so offsets
3643 * in mpage are off by 2 compared to buf. Same for len.
3646 if (len != CONTROL_MPAGE_LEN - 2) {
3647 *fp = min(len, CONTROL_MPAGE_LEN - 2);
3651 d_sense = buf[0] & (1 << 2);
3654 * Check that read-only bits are not modified.
3656 ata_msense_control(dev, mpage, false);
3657 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) {
3660 if (mpage[2 + i] != buf[i]) {
3665 if (d_sense & (1 << 2))
3666 dev->flags |= ATA_DFLAG_D_SENSE;
3668 dev->flags &= ~ATA_DFLAG_D_SENSE;
3673 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands
3674 * @qc: Storage for translated ATA taskfile
3676 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3677 * Assume this is invoked for direct access devices (e.g. disks) only.
3678 * There should be no block descriptor for other device types.
3681 * spin_lock_irqsave(host lock)
3683 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3685 struct scsi_cmnd *scmd = qc->scsicmd;
3686 const u8 *cdb = scmd->cmnd;
3688 unsigned six_byte, pg_len, hdr_len, bd_len;
3693 const u8 *p = buffer;
3697 six_byte = (cdb[0] == MODE_SELECT);
3699 if (scmd->cmd_len < 5) {
3707 if (scmd->cmd_len < 9) {
3712 len = (cdb[7] << 8) + cdb[8];
3716 /* We only support PF=1, SP=0. */
3717 if ((cdb[1] & 0x11) != 0x10) {
3719 bp = (cdb[1] & 0x01) ? 1 : 5;
3723 /* Test early for possible overrun. */
3724 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
3725 goto invalid_param_len;
3727 /* Move past header and block descriptors. */
3729 goto invalid_param_len;
3731 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd),
3732 buffer, sizeof(buffer)))
3733 goto invalid_param_len;
3738 bd_len = (p[6] << 8) + p[7];
3743 goto invalid_param_len;
3744 if (bd_len != 0 && bd_len != 8) {
3745 fp = (six_byte) ? 3 : 6;
3746 fp += bd_len + hdr_len;
3755 /* Parse both possible formats for the mode page headers. */
3759 goto invalid_param_len;
3762 pg_len = (p[2] << 8) | p[3];
3767 goto invalid_param_len;
3776 * No mode subpages supported (yet) but asking for _all_
3777 * subpages may be valid
3779 if (spg && (spg != ALL_SUB_MPAGES)) {
3780 fp = (p[0] & 0x40) ? 1 : 0;
3781 fp += hdr_len + bd_len;
3785 goto invalid_param_len;
3789 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) {
3790 fp += hdr_len + bd_len;
3795 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) {
3796 fp += hdr_len + bd_len;
3799 goto skip; /* No ATA command to send */
3802 default: /* invalid page code */
3803 fp = bd_len + hdr_len;
3808 * Only one page has changeable data, so we only support setting one
3817 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
3821 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp);
3825 /* "Parameter list length error" */
3826 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3830 scmd->result = SAM_STAT_GOOD;
3834 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma)
3837 return ATA_CMD_TRUSTED_NONDATA;
3839 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND;
3841 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV;
3844 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc)
3846 struct scsi_cmnd *scmd = qc->scsicmd;
3847 const u8 *cdb = scmd->cmnd;
3848 struct ata_taskfile *tf = &qc->tf;
3850 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT);
3851 u16 spsp = get_unaligned_be16(&cdb[2]);
3852 u32 len = get_unaligned_be32(&cdb[6]);
3853 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO);
3856 * We don't support the ATA "security" protocol.
3859 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0);
3863 if (cdb[4] & 7) { /* INC_512 */
3865 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0);
3869 if (len > 0x01fffe00) {
3870 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0);
3874 /* convert to the sector-based ATA addressing */
3875 len = (len + 511) / 512;
3878 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO;
3879 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA;
3881 tf->flags |= ATA_TFLAG_WRITE;
3882 tf->command = ata_scsi_trusted_op(len, send, dma);
3884 tf->lbam = spsp & 0xff;
3885 tf->lbah = spsp >> 8;
3888 tf->nsect = len & 0xff;
3889 tf->lbal = len >> 8;
3892 tf->lbah = (1 << 7);
3895 ata_qc_set_pc_nbytes(qc);
3900 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler
3901 * @qc: Command to be translated
3903 * Translate a SCSI variable length CDB to specified commands.
3904 * It checks a service action value in CDB to call corresponding handler.
3907 * Zero on success, non-zero on failure
3910 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc)
3912 struct scsi_cmnd *scmd = qc->scsicmd;
3913 const u8 *cdb = scmd->cmnd;
3914 const u16 sa = get_unaligned_be16(&cdb[8]);
3917 * if service action represents a ata pass-thru(32) command,
3918 * then pass it to ata_scsi_pass_thru handler.
3921 return ata_scsi_pass_thru(qc);
3923 /* unsupported service action */
3928 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3930 * @cmd: SCSI command opcode to consider
3932 * Look up the SCSI command given, and determine whether the
3933 * SCSI command is to be translated or simulated.
3936 * Pointer to translation function if possible, %NULL if not.
3939 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3949 return ata_scsi_rw_xlat;
3952 return ata_scsi_write_same_xlat;
3954 case SYNCHRONIZE_CACHE:
3955 if (ata_try_flush_cache(dev))
3956 return ata_scsi_flush_xlat;
3961 return ata_scsi_verify_xlat;
3965 return ata_scsi_pass_thru;
3967 case VARIABLE_LENGTH_CMD:
3968 return ata_scsi_var_len_cdb_xlat;
3971 case MODE_SELECT_10:
3972 return ata_scsi_mode_select_xlat;
3976 return ata_scsi_zbc_in_xlat;
3979 return ata_scsi_zbc_out_xlat;
3981 case SECURITY_PROTOCOL_IN:
3982 case SECURITY_PROTOCOL_OUT:
3983 if (!(dev->flags & ATA_DFLAG_TRUSTED))
3985 return ata_scsi_security_inout_xlat;
3988 return ata_scsi_start_stop_xlat;
3995 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3996 * @ap: ATA port to which the command was being sent
3997 * @cmd: SCSI command to dump
3999 * Prints the contents of a SCSI command via printk().
4002 void ata_scsi_dump_cdb(struct ata_port *ap, struct scsi_cmnd *cmd)
4004 #ifdef ATA_VERBOSE_DEBUG
4005 struct scsi_device *scsidev = cmd->device;
4007 VPRINTK("CDB (%u:%d,%d,%lld) %9ph\n",
4009 scsidev->channel, scsidev->id, scsidev->lun,
4014 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev)
4016 u8 scsi_op = scmd->cmnd[0];
4017 ata_xlat_func_t xlat_func;
4020 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
4021 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
4024 xlat_func = ata_get_xlat_func(dev, scsi_op);
4026 if (unlikely(!scmd->cmd_len))
4030 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
4031 /* relay SCSI command to ATAPI device */
4032 int len = COMMAND_SIZE(scsi_op);
4033 if (unlikely(len > scmd->cmd_len ||
4034 len > dev->cdb_len ||
4035 scmd->cmd_len > ATAPI_CDB_LEN))
4038 xlat_func = atapi_xlat;
4040 /* ATA_16 passthru, treat as an ATA command */
4041 if (unlikely(scmd->cmd_len > 16))
4044 xlat_func = ata_get_xlat_func(dev, scsi_op);
4049 rc = ata_scsi_translate(dev, scmd, xlat_func);
4051 ata_scsi_simulate(dev, scmd);
4056 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
4057 scmd->cmd_len, scsi_op, dev->cdb_len);
4058 scmd->result = DID_ERROR << 16;
4064 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
4065 * @shost: SCSI host of command to be sent
4066 * @cmd: SCSI command to be sent
4068 * In some cases, this function translates SCSI commands into
4069 * ATA taskfiles, and queues the taskfiles to be sent to
4070 * hardware. In other cases, this function simulates a
4071 * SCSI device by evaluating and responding to certain
4072 * SCSI commands. This creates the overall effect of
4073 * ATA and ATAPI devices appearing as SCSI devices.
4079 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4082 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
4084 struct ata_port *ap;
4085 struct ata_device *dev;
4086 struct scsi_device *scsidev = cmd->device;
4088 unsigned long irq_flags;
4090 ap = ata_shost_to_port(shost);
4092 spin_lock_irqsave(ap->lock, irq_flags);
4094 ata_scsi_dump_cdb(ap, cmd);
4096 dev = ata_scsi_find_dev(ap, scsidev);
4098 rc = __ata_scsi_queuecmd(cmd, dev);
4100 cmd->result = (DID_BAD_TARGET << 16);
4104 spin_unlock_irqrestore(ap->lock, irq_flags);
4108 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
4111 * ata_scsi_simulate - simulate SCSI command on ATA device
4112 * @dev: the target device
4113 * @cmd: SCSI command being sent to device.
4115 * Interprets and directly executes a select list of SCSI commands
4116 * that can be handled internally.
4119 * spin_lock_irqsave(host lock)
4122 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
4124 struct ata_scsi_args args;
4125 const u8 *scsicmd = cmd->cmnd;
4132 switch(scsicmd[0]) {
4134 if (scsicmd[1] & 2) /* is CmdDt set? */
4135 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4136 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
4137 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
4138 else switch (scsicmd[2]) {
4140 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
4143 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
4146 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
4149 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
4152 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
4155 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
4158 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
4161 if (dev->flags & ATA_DFLAG_ZAC)
4162 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6);
4164 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
4168 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b9);
4170 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
4173 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
4180 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
4184 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4187 case SERVICE_ACTION_IN_16:
4188 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
4189 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4191 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4195 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
4199 ata_scsi_set_sense(dev, cmd, 0, 0, 0);
4202 /* if we reach this, then writeback caching is disabled,
4203 * turning this into a no-op.
4205 case SYNCHRONIZE_CACHE:
4208 /* no-op's, complete with success */
4212 case TEST_UNIT_READY:
4215 case SEND_DIAGNOSTIC:
4216 tmp8 = scsicmd[1] & ~(1 << 3);
4217 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4])
4218 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4221 case MAINTENANCE_IN:
4222 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES)
4223 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in);
4225 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4228 /* all other commands */
4230 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0);
4231 /* "Invalid command operation code" */
4238 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
4242 for (i = 0; i < host->n_ports; i++) {
4243 struct ata_port *ap = host->ports[i];
4244 struct Scsi_Host *shost;
4247 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
4251 shost->eh_noresume = 1;
4252 *(struct ata_port **)&shost->hostdata[0] = ap;
4253 ap->scsi_host = shost;
4255 shost->transportt = ata_scsi_transport_template;
4256 shost->unique_id = ap->print_id;
4259 shost->max_channel = 1;
4260 shost->max_cmd_len = 32;
4262 /* Schedule policy is determined by ->qc_defer()
4263 * callback and it needs to see every deferred qc.
4264 * Set host_blocked to 1 to prevent SCSI midlayer from
4265 * automatically deferring requests.
4267 shost->max_host_blocked = 1;
4269 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev);
4278 struct Scsi_Host *shost = host->ports[i]->scsi_host;
4280 /* scsi_host_put() is in ata_devres_release() */
4281 scsi_remove_host(shost);
4287 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap)
4289 struct scsi_device *sdev = dev->sdev;
4290 struct device *d = ap->host->dev;
4291 struct device_node *np = d->of_node;
4292 struct device_node *child;
4294 for_each_available_child_of_node(np, child) {
4298 ret = of_property_read_u32(child, "reg", &val);
4301 if (val == dev->devno) {
4302 dev_dbg(d, "found matching device node\n");
4303 sdev->sdev_gendev.of_node = child;
4309 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap)
4314 void ata_scsi_scan_host(struct ata_port *ap, int sync)
4317 struct ata_device *last_failed_dev = NULL;
4318 struct ata_link *link;
4319 struct ata_device *dev;
4322 ata_for_each_link(link, ap, EDGE) {
4323 ata_for_each_dev(dev, link, ENABLED) {
4324 struct scsi_device *sdev;
4325 int channel = 0, id = 0;
4330 if (ata_is_host_link(link))
4333 channel = link->pmp;
4335 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
4337 if (!IS_ERR(sdev)) {
4339 ata_scsi_assign_ofnode(dev, ap);
4340 scsi_device_put(sdev);
4347 /* If we scanned while EH was in progress or allocation
4348 * failure occurred, scan would have failed silently. Check
4349 * whether all devices are attached.
4351 ata_for_each_link(link, ap, EDGE) {
4352 ata_for_each_dev(dev, link, ENABLED) {
4361 /* we're missing some SCSI devices */
4363 /* If caller requested synchrnous scan && we've made
4364 * any progress, sleep briefly and repeat.
4366 if (dev != last_failed_dev) {
4368 last_failed_dev = dev;
4372 /* We might be failing to detect boot device, give it
4373 * a few more chances.
4381 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
4384 queue_delayed_work(system_long_wq, &ap->hotplug_task,
4385 round_jiffies_relative(HZ));
4389 * ata_scsi_offline_dev - offline attached SCSI device
4390 * @dev: ATA device to offline attached SCSI device for
4392 * This function is called from ata_eh_hotplug() and responsible
4393 * for taking the SCSI device attached to @dev offline. This
4394 * function is called with host lock which protects dev->sdev
4398 * spin_lock_irqsave(host lock)
4401 * 1 if attached SCSI device exists, 0 otherwise.
4403 int ata_scsi_offline_dev(struct ata_device *dev)
4406 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
4413 * ata_scsi_remove_dev - remove attached SCSI device
4414 * @dev: ATA device to remove attached SCSI device for
4416 * This function is called from ata_eh_scsi_hotplug() and
4417 * responsible for removing the SCSI device attached to @dev.
4420 * Kernel thread context (may sleep).
4422 static void ata_scsi_remove_dev(struct ata_device *dev)
4424 struct ata_port *ap = dev->link->ap;
4425 struct scsi_device *sdev;
4426 unsigned long flags;
4428 /* Alas, we need to grab scan_mutex to ensure SCSI device
4429 * state doesn't change underneath us and thus
4430 * scsi_device_get() always succeeds. The mutex locking can
4431 * be removed if there is __scsi_device_get() interface which
4432 * increments reference counts regardless of device state.
4434 mutex_lock(&ap->scsi_host->scan_mutex);
4435 spin_lock_irqsave(ap->lock, flags);
4437 /* clearing dev->sdev is protected by host lock */
4442 /* If user initiated unplug races with us, sdev can go
4443 * away underneath us after the host lock and
4444 * scan_mutex are released. Hold onto it.
4446 if (scsi_device_get(sdev) == 0) {
4447 /* The following ensures the attached sdev is
4448 * offline on return from ata_scsi_offline_dev()
4449 * regardless it wins or loses the race
4450 * against this function.
4452 scsi_device_set_state(sdev, SDEV_OFFLINE);
4459 spin_unlock_irqrestore(ap->lock, flags);
4460 mutex_unlock(&ap->scsi_host->scan_mutex);
4463 ata_dev_info(dev, "detaching (SCSI %s)\n",
4464 dev_name(&sdev->sdev_gendev));
4466 scsi_remove_device(sdev);
4467 scsi_device_put(sdev);
4471 static void ata_scsi_handle_link_detach(struct ata_link *link)
4473 struct ata_port *ap = link->ap;
4474 struct ata_device *dev;
4476 ata_for_each_dev(dev, link, ALL) {
4477 unsigned long flags;
4479 if (!(dev->flags & ATA_DFLAG_DETACHED))
4482 spin_lock_irqsave(ap->lock, flags);
4483 dev->flags &= ~ATA_DFLAG_DETACHED;
4484 spin_unlock_irqrestore(ap->lock, flags);
4486 if (zpodd_dev_enabled(dev))
4489 ata_scsi_remove_dev(dev);
4494 * ata_scsi_media_change_notify - send media change event
4495 * @dev: Pointer to the disk device with media change event
4497 * Tell the block layer to send a media change notification
4501 * spin_lock_irqsave(host lock)
4503 void ata_scsi_media_change_notify(struct ata_device *dev)
4506 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
4511 * ata_scsi_hotplug - SCSI part of hotplug
4512 * @work: Pointer to ATA port to perform SCSI hotplug on
4514 * Perform SCSI part of hotplug. It's executed from a separate
4515 * workqueue after EH completes. This is necessary because SCSI
4516 * hot plugging requires working EH and hot unplugging is
4517 * synchronized with hot plugging with a mutex.
4520 * Kernel thread context (may sleep).
4522 void ata_scsi_hotplug(struct work_struct *work)
4524 struct ata_port *ap =
4525 container_of(work, struct ata_port, hotplug_task.work);
4528 if (ap->pflags & ATA_PFLAG_UNLOADING) {
4529 DPRINTK("ENTER/EXIT - unloading\n");
4534 mutex_lock(&ap->scsi_scan_mutex);
4536 /* Unplug detached devices. We cannot use link iterator here
4537 * because PMP links have to be scanned even if PMP is
4538 * currently not attached. Iterate manually.
4540 ata_scsi_handle_link_detach(&ap->link);
4542 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
4543 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
4545 /* scan for new ones */
4546 ata_scsi_scan_host(ap, 0);
4548 mutex_unlock(&ap->scsi_scan_mutex);
4553 * ata_scsi_user_scan - indication for user-initiated bus scan
4554 * @shost: SCSI host to scan
4555 * @channel: Channel to scan
4559 * This function is called when user explicitly requests bus
4560 * scan. Set probe pending flag and invoke EH.
4563 * SCSI layer (we don't care)
4568 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
4569 unsigned int id, u64 lun)
4571 struct ata_port *ap = ata_shost_to_port(shost);
4572 unsigned long flags;
4575 if (!ap->ops->error_handler)
4578 if (lun != SCAN_WILD_CARD && lun)
4581 if (!sata_pmp_attached(ap)) {
4582 if (channel != SCAN_WILD_CARD && channel)
4586 if (id != SCAN_WILD_CARD && id)
4591 spin_lock_irqsave(ap->lock, flags);
4593 if (devno == SCAN_WILD_CARD) {
4594 struct ata_link *link;
4596 ata_for_each_link(link, ap, EDGE) {
4597 struct ata_eh_info *ehi = &link->eh_info;
4598 ehi->probe_mask |= ATA_ALL_DEVICES;
4599 ehi->action |= ATA_EH_RESET;
4602 struct ata_device *dev = ata_find_dev(ap, devno);
4605 struct ata_eh_info *ehi = &dev->link->eh_info;
4606 ehi->probe_mask |= 1 << dev->devno;
4607 ehi->action |= ATA_EH_RESET;
4613 ata_port_schedule_eh(ap);
4614 spin_unlock_irqrestore(ap->lock, flags);
4615 ata_port_wait_eh(ap);
4617 spin_unlock_irqrestore(ap->lock, flags);
4623 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4624 * @work: Pointer to ATA port to perform scsi_rescan_device()
4626 * After ATA pass thru (SAT) commands are executed successfully,
4627 * libata need to propagate the changes to SCSI layer.
4630 * Kernel thread context (may sleep).
4632 void ata_scsi_dev_rescan(struct work_struct *work)
4634 struct ata_port *ap =
4635 container_of(work, struct ata_port, scsi_rescan_task);
4636 struct ata_link *link;
4637 struct ata_device *dev;
4638 unsigned long flags;
4640 mutex_lock(&ap->scsi_scan_mutex);
4641 spin_lock_irqsave(ap->lock, flags);
4643 ata_for_each_link(link, ap, EDGE) {
4644 ata_for_each_dev(dev, link, ENABLED) {
4645 struct scsi_device *sdev = dev->sdev;
4649 if (scsi_device_get(sdev))
4652 spin_unlock_irqrestore(ap->lock, flags);
4653 scsi_rescan_device(&(sdev->sdev_gendev));
4654 scsi_device_put(sdev);
4655 spin_lock_irqsave(ap->lock, flags);
4659 spin_unlock_irqrestore(ap->lock, flags);
4660 mutex_unlock(&ap->scsi_scan_mutex);