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 : snprintf(buf, 20, "%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 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
201 scsi_build_sense_buffer(d_sense, cmd->sense_buffer, sk, asc, ascq);
204 void ata_scsi_set_sense_information(struct ata_device *dev,
205 struct scsi_cmnd *cmd,
206 const struct ata_taskfile *tf)
213 information = ata_tf_read_block(tf, dev);
214 if (information == U64_MAX)
217 scsi_set_sense_information(cmd->sense_buffer,
218 SCSI_SENSE_BUFFERSIZE, information);
221 static void ata_scsi_set_invalid_field(struct ata_device *dev,
222 struct scsi_cmnd *cmd, u16 field, u8 bit)
224 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0);
225 /* "Invalid field in CDB" */
226 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
230 static void ata_scsi_set_invalid_parameter(struct ata_device *dev,
231 struct scsi_cmnd *cmd, u16 field)
233 /* "Invalid field in parameter list" */
234 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0);
235 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
239 struct device_attribute *ata_common_sdev_attrs[] = {
240 &dev_attr_unload_heads,
243 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
246 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
247 * @sdev: SCSI device for which BIOS geometry is to be determined
248 * @bdev: block device associated with @sdev
249 * @capacity: capacity of SCSI device
250 * @geom: location to which geometry will be output
252 * Generic bios head/sector/cylinder calculator
253 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
254 * mapping. Some situations may arise where the disk is not
255 * bootable if this is not used.
258 * Defined by the SCSI layer. We don't really care.
263 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
264 sector_t capacity, int geom[])
268 sector_div(capacity, 255*63);
273 EXPORT_SYMBOL_GPL(ata_std_bios_param);
276 * ata_scsi_unlock_native_capacity - unlock native capacity
277 * @sdev: SCSI device to adjust device capacity for
279 * This function is called if a partition on @sdev extends beyond
280 * the end of the device. It requests EH to unlock HPA.
283 * Defined by the SCSI layer. Might sleep.
285 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
287 struct ata_port *ap = ata_shost_to_port(sdev->host);
288 struct ata_device *dev;
291 spin_lock_irqsave(ap->lock, flags);
293 dev = ata_scsi_find_dev(ap, sdev);
294 if (dev && dev->n_sectors < dev->n_native_sectors) {
295 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
296 dev->link->eh_info.action |= ATA_EH_RESET;
297 ata_port_schedule_eh(ap);
300 spin_unlock_irqrestore(ap->lock, flags);
301 ata_port_wait_eh(ap);
303 EXPORT_SYMBOL_GPL(ata_scsi_unlock_native_capacity);
306 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
308 * @sdev: SCSI device to get identify data for
309 * @arg: User buffer area for identify data
312 * Defined by the SCSI layer. We don't really care.
315 * Zero on success, negative errno on error.
317 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
320 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
321 u16 __user *dst = arg;
327 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
330 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
331 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
334 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
335 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
338 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
339 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
346 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
347 * @scsidev: Device to which we are issuing command
348 * @arg: User provided data for issuing command
351 * Defined by the SCSI layer. We don't really care.
354 * Zero on success, negative errno on error.
356 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
359 u8 sensebuf[SCSI_SENSE_BUFFERSIZE];
360 u8 scsi_cmd[MAX_COMMAND_SIZE];
361 u8 args[4], *argbuf = NULL;
363 enum dma_data_direction data_dir;
364 struct scsi_sense_hdr sshdr;
370 if (copy_from_user(args, arg, sizeof(args)))
373 memset(sensebuf, 0, sizeof(sensebuf));
374 memset(scsi_cmd, 0, sizeof(scsi_cmd));
377 argsize = ATA_SECT_SIZE * args[3];
378 argbuf = kmalloc(argsize, GFP_KERNEL);
379 if (argbuf == NULL) {
384 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
385 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
386 block count in sector count field */
387 data_dir = DMA_FROM_DEVICE;
389 scsi_cmd[1] = (3 << 1); /* Non-data */
390 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
394 scsi_cmd[0] = ATA_16;
396 scsi_cmd[4] = args[2];
397 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
398 scsi_cmd[6] = args[3];
399 scsi_cmd[8] = args[1];
400 scsi_cmd[10] = ATA_SMART_LBAM_PASS;
401 scsi_cmd[12] = ATA_SMART_LBAH_PASS;
403 scsi_cmd[6] = args[1];
405 scsi_cmd[14] = args[0];
407 /* Good values for timeout and retries? Values below
408 from scsi_ioctl_send_command() for default case... */
409 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
410 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL);
412 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
413 u8 *desc = sensebuf + 8;
414 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
416 /* If we set cc then ATA pass-through will cause a
417 * check condition even if no error. Filter that. */
418 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
419 if (sshdr.sense_key == RECOVERED_ERROR &&
420 sshdr.asc == 0 && sshdr.ascq == 0x1d)
421 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
424 /* Send userspace a few ATA registers (same as drivers/ide) */
425 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
426 desc[0] == 0x09) { /* code is "ATA Descriptor" */
427 args[0] = desc[13]; /* status */
428 args[1] = desc[3]; /* error */
429 args[2] = desc[5]; /* sector count (0:7) */
430 if (copy_to_user(arg, args, sizeof(args)))
442 && copy_to_user(arg + sizeof(args), argbuf, argsize))
450 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
451 * @scsidev: Device to which we are issuing command
452 * @arg: User provided data for issuing command
455 * Defined by the SCSI layer. We don't really care.
458 * Zero on success, negative errno on error.
460 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
463 u8 sensebuf[SCSI_SENSE_BUFFERSIZE];
464 u8 scsi_cmd[MAX_COMMAND_SIZE];
466 struct scsi_sense_hdr sshdr;
472 if (copy_from_user(args, arg, sizeof(args)))
475 memset(sensebuf, 0, sizeof(sensebuf));
476 memset(scsi_cmd, 0, sizeof(scsi_cmd));
477 scsi_cmd[0] = ATA_16;
478 scsi_cmd[1] = (3 << 1); /* Non-data */
479 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
480 scsi_cmd[4] = args[1];
481 scsi_cmd[6] = args[2];
482 scsi_cmd[8] = args[3];
483 scsi_cmd[10] = args[4];
484 scsi_cmd[12] = args[5];
485 scsi_cmd[13] = args[6] & 0x4f;
486 scsi_cmd[14] = args[0];
488 /* Good values for timeout and retries? Values below
489 from scsi_ioctl_send_command() for default case... */
490 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
491 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL);
493 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
494 u8 *desc = sensebuf + 8;
495 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
497 /* If we set cc then ATA pass-through will cause a
498 * check condition even if no error. Filter that. */
499 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
500 if (sshdr.sense_key == RECOVERED_ERROR &&
501 sshdr.asc == 0 && sshdr.ascq == 0x1d)
502 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
505 /* Send userspace ATA registers */
506 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
507 desc[0] == 0x09) {/* code is "ATA Descriptor" */
508 args[0] = desc[13]; /* status */
509 args[1] = desc[3]; /* error */
510 args[2] = desc[5]; /* sector count (0:7) */
511 args[3] = desc[7]; /* lbal */
512 args[4] = desc[9]; /* lbam */
513 args[5] = desc[11]; /* lbah */
514 args[6] = desc[12]; /* select */
515 if (copy_to_user(arg, args, sizeof(args)))
529 static int ata_ioc32(struct ata_port *ap)
531 if (ap->flags & ATA_FLAG_PIO_DMA)
533 if (ap->pflags & ATA_PFLAG_PIO32)
539 * This handles both native and compat commands, so anything added
540 * here must have a compatible argument, or check in_compat_syscall()
542 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
543 unsigned int cmd, void __user *arg)
551 spin_lock_irqsave(ap->lock, flags);
553 spin_unlock_irqrestore(ap->lock, flags);
555 if (in_compat_syscall())
556 return put_user(val, (compat_ulong_t __user *)arg);
558 return put_user(val, (unsigned long __user *)arg);
561 val = (unsigned long) arg;
563 spin_lock_irqsave(ap->lock, flags);
564 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
566 ap->pflags |= ATA_PFLAG_PIO32;
568 ap->pflags &= ~ATA_PFLAG_PIO32;
570 if (val != ata_ioc32(ap))
573 spin_unlock_irqrestore(ap->lock, flags);
576 case HDIO_GET_IDENTITY:
577 return ata_get_identity(ap, scsidev, arg);
580 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
582 return ata_cmd_ioctl(scsidev, arg);
584 case HDIO_DRIVE_TASK:
585 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
587 return ata_task_ioctl(scsidev, arg);
596 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
598 int ata_scsi_ioctl(struct scsi_device *scsidev, unsigned int cmd,
601 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
604 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
607 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
608 * @dev: ATA device to which the new command is attached
609 * @cmd: SCSI command that originated this ATA command
611 * Obtain a reference to an unused ata_queued_cmd structure,
612 * which is the basic libata structure representing a single
613 * ATA command sent to the hardware.
615 * If a command was available, fill in the SCSI-specific
616 * portions of the structure with information on the
620 * spin_lock_irqsave(host lock)
623 * Command allocated, or %NULL if none available.
625 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
626 struct scsi_cmnd *cmd)
628 struct ata_queued_cmd *qc;
630 qc = ata_qc_new_init(dev, cmd->request->tag);
633 qc->scsidone = cmd->scsi_done;
635 qc->sg = scsi_sglist(cmd);
636 qc->n_elem = scsi_sg_count(cmd);
638 if (cmd->request->rq_flags & RQF_QUIET)
639 qc->flags |= ATA_QCFLAG_QUIET;
641 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
648 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
650 struct scsi_cmnd *scmd = qc->scsicmd;
652 qc->extrabytes = scmd->extra_len;
653 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
657 * ata_dump_status - user friendly display of error info
658 * @id: id of the port in question
659 * @tf: ptr to filled out taskfile
661 * Decode and dump the ATA error/status registers for the user so
662 * that they have some idea what really happened at the non
663 * make-believe layer.
666 * inherited from caller
668 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
670 u8 stat = tf->command, err = tf->feature;
672 pr_warn("ata%u: status=0x%02x { ", id, stat);
673 if (stat & ATA_BUSY) {
674 pr_cont("Busy }\n"); /* Data is not valid in this case */
676 if (stat & ATA_DRDY) pr_cont("DriveReady ");
677 if (stat & ATA_DF) pr_cont("DeviceFault ");
678 if (stat & ATA_DSC) pr_cont("SeekComplete ");
679 if (stat & ATA_DRQ) pr_cont("DataRequest ");
680 if (stat & ATA_CORR) pr_cont("CorrectedError ");
681 if (stat & ATA_SENSE) pr_cont("Sense ");
682 if (stat & ATA_ERR) pr_cont("Error ");
686 pr_warn("ata%u: error=0x%02x { ", id, err);
687 if (err & ATA_ABORTED) pr_cont("DriveStatusError ");
688 if (err & ATA_ICRC) {
689 if (err & ATA_ABORTED)
691 else pr_cont("Sector ");
693 if (err & ATA_UNC) pr_cont("UncorrectableError ");
694 if (err & ATA_IDNF) pr_cont("SectorIdNotFound ");
695 if (err & ATA_TRK0NF) pr_cont("TrackZeroNotFound ");
696 if (err & ATA_AMNF) pr_cont("AddrMarkNotFound ");
703 * ata_to_sense_error - convert ATA error to SCSI error
704 * @id: ATA device number
705 * @drv_stat: value contained in ATA status register
706 * @drv_err: value contained in ATA error register
707 * @sk: the sense key we'll fill out
708 * @asc: the additional sense code we'll fill out
709 * @ascq: the additional sense code qualifier we'll fill out
710 * @verbose: be verbose
712 * Converts an ATA error into a SCSI error. Fill out pointers to
713 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
714 * format sense blocks.
717 * spin_lock_irqsave(host lock)
719 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
720 u8 *asc, u8 *ascq, int verbose)
724 /* Based on the 3ware driver translation table */
725 static const unsigned char sense_table[][4] = {
727 {0xd1, ABORTED_COMMAND, 0x00, 0x00},
728 // Device busy Aborted command
730 {0xd0, ABORTED_COMMAND, 0x00, 0x00},
731 // Device busy Aborted command
733 {0x61, HARDWARE_ERROR, 0x00, 0x00},
734 // Device fault Hardware error
735 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
736 {0x84, ABORTED_COMMAND, 0x47, 0x00},
737 // Data CRC error SCSI parity error
738 /* MC|ID|ABRT|TRK0|MARK */
739 {0x37, NOT_READY, 0x04, 0x00},
740 // Unit offline Not ready
742 {0x09, NOT_READY, 0x04, 0x00},
743 // Unrecovered disk error Not ready
744 /* Bad address mark */
745 {0x01, MEDIUM_ERROR, 0x13, 0x00},
746 // Address mark not found for data field
747 /* TRK0 - Track 0 not found */
748 {0x02, HARDWARE_ERROR, 0x00, 0x00},
750 /* Abort: 0x04 is not translated here, see below */
751 /* Media change request */
752 {0x08, NOT_READY, 0x04, 0x00},
753 // FIXME: faking offline
754 /* SRV/IDNF - ID not found */
755 {0x10, ILLEGAL_REQUEST, 0x21, 0x00},
756 // Logical address out of range
757 /* MC - Media Changed */
758 {0x20, UNIT_ATTENTION, 0x28, 0x00},
759 // Not ready to ready change, medium may have changed
760 /* ECC - Uncorrectable ECC error */
761 {0x40, MEDIUM_ERROR, 0x11, 0x04},
762 // Unrecovered read error
763 /* BBD - block marked bad */
764 {0x80, MEDIUM_ERROR, 0x11, 0x04},
765 // Block marked bad Medium error, unrecovered read error
766 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
768 static const unsigned char stat_table[][4] = {
769 /* Must be first because BUSY means no other bits valid */
770 {0x80, ABORTED_COMMAND, 0x47, 0x00},
771 // Busy, fake parity for now
772 {0x40, ILLEGAL_REQUEST, 0x21, 0x04},
773 // Device ready, unaligned write command
774 {0x20, HARDWARE_ERROR, 0x44, 0x00},
775 // Device fault, internal target failure
776 {0x08, ABORTED_COMMAND, 0x47, 0x00},
777 // Timed out in xfer, fake parity for now
778 {0x04, RECOVERED_ERROR, 0x11, 0x00},
779 // Recovered ECC error Medium error, recovered
780 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
784 * Is this an error we can process/parse
786 if (drv_stat & ATA_BUSY) {
787 drv_err = 0; /* Ignore the err bits, they're invalid */
791 /* Look for drv_err */
792 for (i = 0; sense_table[i][0] != 0xFF; i++) {
793 /* Look for best matches first */
794 if ((sense_table[i][0] & drv_err) ==
796 *sk = sense_table[i][1];
797 *asc = sense_table[i][2];
798 *ascq = sense_table[i][3];
805 * Fall back to interpreting status bits. Note that if the drv_err
806 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
807 * is not descriptive enough.
809 for (i = 0; stat_table[i][0] != 0xFF; i++) {
810 if (stat_table[i][0] & drv_stat) {
811 *sk = stat_table[i][1];
812 *asc = stat_table[i][2];
813 *ascq = stat_table[i][3];
819 * We need a sensible error return here, which is tricky, and one
820 * that won't cause people to do things like return a disk wrongly.
822 *sk = ABORTED_COMMAND;
828 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
829 id, drv_stat, drv_err, *sk, *asc, *ascq);
834 * ata_gen_passthru_sense - Generate check condition sense block.
835 * @qc: Command that completed.
837 * This function is specific to the ATA descriptor format sense
838 * block specified for the ATA pass through commands. Regardless
839 * of whether the command errored or not, return a sense
840 * block. Copy all controller registers into the sense
841 * block. If there was no error, we get the request from an ATA
842 * passthrough command, so we use the following sense data:
843 * sk = RECOVERED ERROR
844 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
850 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
852 struct scsi_cmnd *cmd = qc->scsicmd;
853 struct ata_taskfile *tf = &qc->result_tf;
854 unsigned char *sb = cmd->sense_buffer;
855 unsigned char *desc = sb + 8;
856 int verbose = qc->ap->ops->error_handler == NULL;
857 u8 sense_key, asc, ascq;
859 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
861 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
864 * Use ata_to_sense_error() to map status register bits
865 * onto sense key, asc & ascq.
868 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
869 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
870 &sense_key, &asc, &ascq, verbose);
871 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq);
874 * ATA PASS-THROUGH INFORMATION AVAILABLE
875 * Always in descriptor format sense.
877 scsi_build_sense_buffer(1, cmd->sense_buffer,
878 RECOVERED_ERROR, 0, 0x1D);
881 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) {
884 /* descriptor format */
886 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9);
888 if (SCSI_SENSE_BUFFERSIZE < len + 14)
896 * Copy registers into sense buffer.
899 desc[3] = tf->feature; /* == error reg */
904 desc[12] = tf->device;
905 desc[13] = tf->command; /* == status reg */
908 * Fill in Extend bit, and the high order bytes
911 if (tf->flags & ATA_TFLAG_LBA48) {
913 desc[4] = tf->hob_nsect;
914 desc[6] = tf->hob_lbal;
915 desc[8] = tf->hob_lbam;
916 desc[10] = tf->hob_lbah;
919 /* Fixed sense format */
920 desc[0] = tf->feature;
921 desc[1] = tf->command; /* status */
922 desc[2] = tf->device;
925 if (tf->flags & ATA_TFLAG_LBA48) {
929 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah)
939 * ata_gen_ata_sense - generate a SCSI fixed sense block
940 * @qc: Command that we are erroring out
942 * Generate sense block for a failed ATA command @qc. Descriptor
943 * format is used to accommodate LBA48 block address.
948 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
950 struct ata_device *dev = qc->dev;
951 struct scsi_cmnd *cmd = qc->scsicmd;
952 struct ata_taskfile *tf = &qc->result_tf;
953 unsigned char *sb = cmd->sense_buffer;
954 int verbose = qc->ap->ops->error_handler == NULL;
956 u8 sense_key, asc, ascq;
958 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
960 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
962 if (ata_dev_disabled(dev)) {
963 /* Device disabled after error recovery */
964 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
965 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21);
968 /* Use ata_to_sense_error() to map status register bits
969 * onto sense key, asc & ascq.
972 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
973 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
974 &sense_key, &asc, &ascq, verbose);
975 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq);
977 /* Could not decode error */
978 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n",
979 tf->command, qc->err_mask);
980 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0);
984 block = ata_tf_read_block(&qc->result_tf, dev);
985 if (block == U64_MAX)
988 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block);
991 void ata_scsi_sdev_config(struct scsi_device *sdev)
993 sdev->use_10_for_rw = 1;
994 sdev->use_10_for_ms = 1;
995 sdev->no_write_same = 1;
997 /* Schedule policy is determined by ->qc_defer() callback and
998 * it needs to see every deferred qc. Set dev_blocked to 1 to
999 * prevent SCSI midlayer from automatically deferring
1002 sdev->max_device_blocked = 1;
1006 * ata_scsi_dma_need_drain - Check whether data transfer may overflow
1007 * @rq: request to be checked
1009 * ATAPI commands which transfer variable length data to host
1010 * might overflow due to application error or hardware bug. This
1011 * function checks whether overflow should be drained and ignored
1018 * 1 if ; otherwise, 0.
1020 bool ata_scsi_dma_need_drain(struct request *rq)
1022 return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC;
1024 EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain);
1026 int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev)
1028 struct request_queue *q = sdev->request_queue;
1030 if (!ata_id_has_unload(dev->id))
1031 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1033 /* configure max sectors */
1034 blk_queue_max_hw_sectors(q, dev->max_sectors);
1036 if (dev->class == ATA_DEV_ATAPI) {
1037 sdev->sector_size = ATA_SECT_SIZE;
1039 /* set DMA padding */
1040 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1042 /* make room for appending the drain */
1043 blk_queue_max_segments(q, queue_max_segments(q) - 1);
1045 sdev->dma_drain_len = ATAPI_MAX_DRAIN;
1046 sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len,
1047 q->bounce_gfp | GFP_KERNEL);
1048 if (!sdev->dma_drain_buf) {
1049 ata_dev_err(dev, "drain buffer allocation failed\n");
1053 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1054 sdev->manage_start_stop = 1;
1058 * ata_pio_sectors() expects buffer for each sector to not cross
1059 * page boundary. Enforce it by requiring buffers to be sector
1060 * aligned, which works iff sector_size is not larger than
1061 * PAGE_SIZE. ATAPI devices also need the alignment as
1062 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1064 if (sdev->sector_size > PAGE_SIZE)
1066 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1069 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1071 if (dev->flags & ATA_DFLAG_AN)
1072 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1074 if (dev->flags & ATA_DFLAG_NCQ) {
1077 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1078 depth = min(ATA_MAX_QUEUE, depth);
1079 scsi_change_queue_depth(sdev, depth);
1082 if (dev->flags & ATA_DFLAG_TRUSTED)
1083 sdev->security_supported = 1;
1090 * ata_scsi_slave_config - Set SCSI device attributes
1091 * @sdev: SCSI device to examine
1093 * This is called before we actually start reading
1094 * and writing to the device, to configure certain
1095 * SCSI mid-layer behaviors.
1098 * Defined by SCSI layer. We don't really care.
1101 int ata_scsi_slave_config(struct scsi_device *sdev)
1103 struct ata_port *ap = ata_shost_to_port(sdev->host);
1104 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1107 ata_scsi_sdev_config(sdev);
1110 rc = ata_scsi_dev_config(sdev, dev);
1114 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
1117 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1118 * @sdev: SCSI device to be destroyed
1120 * @sdev is about to be destroyed for hot/warm unplugging. If
1121 * this unplugging was initiated by libata as indicated by NULL
1122 * dev->sdev, this function doesn't have to do anything.
1123 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1124 * Clear dev->sdev, schedule the device for ATA detach and invoke
1128 * Defined by SCSI layer. We don't really care.
1130 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1132 struct ata_port *ap = ata_shost_to_port(sdev->host);
1133 unsigned long flags;
1134 struct ata_device *dev;
1136 if (!ap->ops->error_handler)
1139 spin_lock_irqsave(ap->lock, flags);
1140 dev = __ata_scsi_find_dev(ap, sdev);
1141 if (dev && dev->sdev) {
1142 /* SCSI device already in CANCEL state, no need to offline it */
1144 dev->flags |= ATA_DFLAG_DETACH;
1145 ata_port_schedule_eh(ap);
1147 spin_unlock_irqrestore(ap->lock, flags);
1149 kfree(sdev->dma_drain_buf);
1151 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
1154 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1155 * @qc: Storage for translated ATA taskfile
1157 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1158 * (to start). Perhaps these commands should be preceded by
1159 * CHECK POWER MODE to see what power mode the device is already in.
1160 * [See SAT revision 5 at www.t10.org]
1163 * spin_lock_irqsave(host lock)
1166 * Zero on success, non-zero on error.
1168 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1170 struct scsi_cmnd *scmd = qc->scsicmd;
1171 struct ata_taskfile *tf = &qc->tf;
1172 const u8 *cdb = scmd->cmnd;
1176 if (scmd->cmd_len < 5) {
1181 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1182 tf->protocol = ATA_PROT_NODATA;
1184 ; /* ignore IMMED bit, violates sat-r05 */
1189 goto invalid_fld; /* LOEJ bit set not supported */
1191 if (((cdb[4] >> 4) & 0xf) != 0) {
1194 goto invalid_fld; /* power conditions not supported */
1198 tf->nsect = 1; /* 1 sector, lba=0 */
1200 if (qc->dev->flags & ATA_DFLAG_LBA) {
1201 tf->flags |= ATA_TFLAG_LBA;
1206 tf->device |= ATA_LBA;
1209 tf->lbal = 0x1; /* sect */
1210 tf->lbam = 0x0; /* cyl low */
1211 tf->lbah = 0x0; /* cyl high */
1214 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1216 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1217 * or S5) causing some drives to spin up and down again.
1219 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1220 system_state == SYSTEM_POWER_OFF)
1223 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1224 system_entering_hibernation())
1227 /* Issue ATA STANDBY IMMEDIATE command */
1228 tf->command = ATA_CMD_STANDBYNOW1;
1232 * Standby and Idle condition timers could be implemented but that
1233 * would require libata to implement the Power condition mode page
1234 * and allow the user to change it. Changing mode pages requires
1235 * MODE SELECT to be implemented.
1241 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
1244 scmd->result = SAM_STAT_GOOD;
1250 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1251 * @qc: Storage for translated ATA taskfile
1253 * Sets up an ATA taskfile to issue FLUSH CACHE or
1257 * spin_lock_irqsave(host lock)
1260 * Zero on success, non-zero on error.
1262 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1264 struct ata_taskfile *tf = &qc->tf;
1266 tf->flags |= ATA_TFLAG_DEVICE;
1267 tf->protocol = ATA_PROT_NODATA;
1269 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1270 tf->command = ATA_CMD_FLUSH_EXT;
1272 tf->command = ATA_CMD_FLUSH;
1274 /* flush is critical for IO integrity, consider it an IO command */
1275 qc->flags |= ATA_QCFLAG_IO;
1281 * scsi_6_lba_len - Get LBA and transfer length
1282 * @cdb: SCSI command to translate
1284 * Calculate LBA and transfer length for 6-byte commands.
1288 * @plen: the transfer length
1290 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1295 VPRINTK("six-byte command\n");
1297 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1298 lba |= ((u64)cdb[2]) << 8;
1299 lba |= ((u64)cdb[3]);
1308 * scsi_10_lba_len - Get LBA and transfer length
1309 * @cdb: SCSI command to translate
1311 * Calculate LBA and transfer length for 10-byte commands.
1315 * @plen: the transfer length
1317 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1322 VPRINTK("ten-byte command\n");
1324 lba |= ((u64)cdb[2]) << 24;
1325 lba |= ((u64)cdb[3]) << 16;
1326 lba |= ((u64)cdb[4]) << 8;
1327 lba |= ((u64)cdb[5]);
1329 len |= ((u32)cdb[7]) << 8;
1330 len |= ((u32)cdb[8]);
1337 * scsi_16_lba_len - Get LBA and transfer length
1338 * @cdb: SCSI command to translate
1340 * Calculate LBA and transfer length for 16-byte commands.
1344 * @plen: the transfer length
1346 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1351 VPRINTK("sixteen-byte command\n");
1353 lba |= ((u64)cdb[2]) << 56;
1354 lba |= ((u64)cdb[3]) << 48;
1355 lba |= ((u64)cdb[4]) << 40;
1356 lba |= ((u64)cdb[5]) << 32;
1357 lba |= ((u64)cdb[6]) << 24;
1358 lba |= ((u64)cdb[7]) << 16;
1359 lba |= ((u64)cdb[8]) << 8;
1360 lba |= ((u64)cdb[9]);
1362 len |= ((u32)cdb[10]) << 24;
1363 len |= ((u32)cdb[11]) << 16;
1364 len |= ((u32)cdb[12]) << 8;
1365 len |= ((u32)cdb[13]);
1372 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1373 * @qc: Storage for translated ATA taskfile
1375 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1378 * spin_lock_irqsave(host lock)
1381 * Zero on success, non-zero on error.
1383 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1385 struct scsi_cmnd *scmd = qc->scsicmd;
1386 struct ata_taskfile *tf = &qc->tf;
1387 struct ata_device *dev = qc->dev;
1388 u64 dev_sectors = qc->dev->n_sectors;
1389 const u8 *cdb = scmd->cmnd;
1394 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1395 tf->protocol = ATA_PROT_NODATA;
1397 if (cdb[0] == VERIFY) {
1398 if (scmd->cmd_len < 10) {
1402 scsi_10_lba_len(cdb, &block, &n_block);
1403 } else if (cdb[0] == VERIFY_16) {
1404 if (scmd->cmd_len < 16) {
1408 scsi_16_lba_len(cdb, &block, &n_block);
1416 if (block >= dev_sectors)
1418 if ((block + n_block) > dev_sectors)
1421 if (dev->flags & ATA_DFLAG_LBA) {
1422 tf->flags |= ATA_TFLAG_LBA;
1424 if (lba_28_ok(block, n_block)) {
1426 tf->command = ATA_CMD_VERIFY;
1427 tf->device |= (block >> 24) & 0xf;
1428 } else if (lba_48_ok(block, n_block)) {
1429 if (!(dev->flags & ATA_DFLAG_LBA48))
1433 tf->flags |= ATA_TFLAG_LBA48;
1434 tf->command = ATA_CMD_VERIFY_EXT;
1436 tf->hob_nsect = (n_block >> 8) & 0xff;
1438 tf->hob_lbah = (block >> 40) & 0xff;
1439 tf->hob_lbam = (block >> 32) & 0xff;
1440 tf->hob_lbal = (block >> 24) & 0xff;
1442 /* request too large even for LBA48 */
1445 tf->nsect = n_block & 0xff;
1447 tf->lbah = (block >> 16) & 0xff;
1448 tf->lbam = (block >> 8) & 0xff;
1449 tf->lbal = block & 0xff;
1451 tf->device |= ATA_LBA;
1454 u32 sect, head, cyl, track;
1456 if (!lba_28_ok(block, n_block))
1459 /* Convert LBA to CHS */
1460 track = (u32)block / dev->sectors;
1461 cyl = track / dev->heads;
1462 head = track % dev->heads;
1463 sect = (u32)block % dev->sectors + 1;
1465 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1466 (u32)block, track, cyl, head, sect);
1468 /* Check whether the converted CHS can fit.
1472 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1475 tf->command = ATA_CMD_VERIFY;
1476 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1479 tf->lbah = cyl >> 8;
1486 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1490 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1491 /* "Logical Block Address out of range" */
1495 scmd->result = SAM_STAT_GOOD;
1499 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks)
1501 struct request *rq = scmd->request;
1504 if (!blk_rq_is_passthrough(rq))
1507 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size;
1508 if (n_blocks > req_blocks)
1515 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1516 * @qc: Storage for translated ATA taskfile
1518 * Converts any of six SCSI read/write commands into the
1519 * ATA counterpart, including starting sector (LBA),
1520 * sector count, and taking into account the device's LBA48
1523 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1524 * %WRITE_16 are currently supported.
1527 * spin_lock_irqsave(host lock)
1530 * Zero on success, non-zero on error.
1532 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1534 struct scsi_cmnd *scmd = qc->scsicmd;
1535 const u8 *cdb = scmd->cmnd;
1536 struct request *rq = scmd->request;
1537 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
1538 unsigned int tf_flags = 0;
1544 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1545 tf_flags |= ATA_TFLAG_WRITE;
1547 /* Calculate the SCSI LBA, transfer length and FUA. */
1551 if (unlikely(scmd->cmd_len < 10)) {
1555 scsi_10_lba_len(cdb, &block, &n_block);
1556 if (cdb[1] & (1 << 3))
1557 tf_flags |= ATA_TFLAG_FUA;
1558 if (!ata_check_nblocks(scmd, n_block))
1563 if (unlikely(scmd->cmd_len < 6)) {
1567 scsi_6_lba_len(cdb, &block, &n_block);
1569 /* for 6-byte r/w commands, transfer length 0
1570 * means 256 blocks of data, not 0 block.
1574 if (!ata_check_nblocks(scmd, n_block))
1579 if (unlikely(scmd->cmd_len < 16)) {
1583 scsi_16_lba_len(cdb, &block, &n_block);
1584 if (cdb[1] & (1 << 3))
1585 tf_flags |= ATA_TFLAG_FUA;
1586 if (!ata_check_nblocks(scmd, n_block))
1590 DPRINTK("no-byte command\n");
1595 /* Check and compose ATA command */
1597 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1598 * length 0 means transfer 0 block of data.
1599 * However, for ATA R/W commands, sector count 0 means
1600 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1602 * WARNING: one or two older ATA drives treat 0 as 0...
1606 qc->flags |= ATA_QCFLAG_IO;
1607 qc->nbytes = n_block * scmd->device->sector_size;
1609 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1612 if (likely(rc == 0))
1617 /* treat all other errors as -EINVAL, fall through */
1619 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1623 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1624 /* "Logical Block Address out of range" */
1628 scmd->result = SAM_STAT_GOOD;
1632 static void ata_qc_done(struct ata_queued_cmd *qc)
1634 struct scsi_cmnd *cmd = qc->scsicmd;
1635 void (*done)(struct scsi_cmnd *) = qc->scsidone;
1641 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1643 struct ata_port *ap = qc->ap;
1644 struct scsi_cmnd *cmd = qc->scsicmd;
1645 u8 *cdb = cmd->cmnd;
1646 int need_sense = (qc->err_mask != 0);
1648 /* For ATA pass thru (SAT) commands, generate a sense block if
1649 * user mandated it or if there's an error. Note that if we
1650 * generate because the user forced us to [CK_COND =1], a check
1651 * condition is generated and the ATA register values are returned
1652 * whether the command completed successfully or not. If there
1653 * was no error, we use the following sense data:
1654 * sk = RECOVERED ERROR
1655 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1657 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1658 ((cdb[2] & 0x20) || need_sense))
1659 ata_gen_passthru_sense(qc);
1660 else if (qc->flags & ATA_QCFLAG_SENSE_VALID)
1661 cmd->result = SAM_STAT_CHECK_CONDITION;
1662 else if (need_sense)
1663 ata_gen_ata_sense(qc);
1665 cmd->result = SAM_STAT_GOOD;
1667 if (need_sense && !ap->ops->error_handler)
1668 ata_dump_status(ap->print_id, &qc->result_tf);
1674 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1675 * @dev: ATA device to which the command is addressed
1676 * @cmd: SCSI command to execute
1677 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1679 * Our ->queuecommand() function has decided that the SCSI
1680 * command issued can be directly translated into an ATA
1681 * command, rather than handled internally.
1683 * This function sets up an ata_queued_cmd structure for the
1684 * SCSI command, and sends that ata_queued_cmd to the hardware.
1686 * The xlat_func argument (actor) returns 0 if ready to execute
1687 * ATA command, else 1 to finish translation. If 1 is returned
1688 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1689 * to be set reflecting an error condition or clean (early)
1693 * spin_lock_irqsave(host lock)
1696 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1697 * needs to be deferred.
1699 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1700 ata_xlat_func_t xlat_func)
1702 struct ata_port *ap = dev->link->ap;
1703 struct ata_queued_cmd *qc;
1708 qc = ata_scsi_qc_new(dev, cmd);
1712 /* data is present; dma-map it */
1713 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1714 cmd->sc_data_direction == DMA_TO_DEVICE) {
1715 if (unlikely(scsi_bufflen(cmd) < 1)) {
1716 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
1720 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1722 qc->dma_dir = cmd->sc_data_direction;
1725 qc->complete_fn = ata_scsi_qc_complete;
1730 if (ap->ops->qc_defer) {
1731 if ((rc = ap->ops->qc_defer(qc)))
1735 /* select device, send command to hardware */
1743 cmd->scsi_done(cmd);
1744 DPRINTK("EXIT - early finish (good or error)\n");
1749 cmd->result = (DID_ERROR << 16);
1750 cmd->scsi_done(cmd);
1752 DPRINTK("EXIT - internal\n");
1757 DPRINTK("EXIT - defer\n");
1758 if (rc == ATA_DEFER_LINK)
1759 return SCSI_MLQUEUE_DEVICE_BUSY;
1761 return SCSI_MLQUEUE_HOST_BUSY;
1764 struct ata_scsi_args {
1765 struct ata_device *dev;
1767 struct scsi_cmnd *cmd;
1771 * ata_scsi_rbuf_get - Map response buffer.
1772 * @cmd: SCSI command containing buffer to be mapped.
1773 * @flags: unsigned long variable to store irq enable status
1774 * @copy_in: copy in from user buffer
1776 * Prepare buffer for simulated SCSI commands.
1779 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1782 * Pointer to response buffer.
1784 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1785 unsigned long *flags)
1787 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1789 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1791 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1792 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1793 return ata_scsi_rbuf;
1797 * ata_scsi_rbuf_put - Unmap response buffer.
1798 * @cmd: SCSI command containing buffer to be unmapped.
1799 * @copy_out: copy out result
1800 * @flags: @flags passed to ata_scsi_rbuf_get()
1802 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1803 * @copy_back is true.
1806 * Unlocks ata_scsi_rbuf_lock.
1808 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1809 unsigned long *flags)
1812 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1813 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1814 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1818 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1819 * @args: device IDENTIFY data / SCSI command of interest.
1820 * @actor: Callback hook for desired SCSI command simulator
1822 * Takes care of the hard work of simulating a SCSI command...
1823 * Mapping the response buffer, calling the command's handler,
1824 * and handling the handler's return value. This return value
1825 * indicates whether the handler wishes the SCSI command to be
1826 * completed successfully (0), or not (in which case cmd->result
1827 * and sense buffer are assumed to be set).
1830 * spin_lock_irqsave(host lock)
1832 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1833 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1837 struct scsi_cmnd *cmd = args->cmd;
1838 unsigned long flags;
1840 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1841 rc = actor(args, rbuf);
1842 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
1845 cmd->result = SAM_STAT_GOOD;
1849 * ata_scsiop_inq_std - Simulate INQUIRY command
1850 * @args: device IDENTIFY data / SCSI command of interest.
1851 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1853 * Returns standard device identification data associated
1854 * with non-VPD INQUIRY command output.
1857 * spin_lock_irqsave(host lock)
1859 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1861 static const u8 versions[] = {
1863 0x60, /* SAM-3 (no version claimed) */
1866 0x20, /* SBC-2 (no version claimed) */
1869 0x00 /* SPC-3 (no version claimed) */
1871 static const u8 versions_zbc[] = {
1873 0xA0, /* SAM-5 (no version claimed) */
1876 0x00, /* SBC-4 (no version claimed) */
1879 0xC0, /* SPC-5 (no version claimed) */
1888 0x5, /* claim SPC-3 version compatibility */
1898 /* set scsi removable (RMB) bit per ata bit, or if the
1899 * AHCI port says it's external (Hotplug-capable, eSATA).
1901 if (ata_id_removable(args->id) ||
1902 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL))
1905 if (args->dev->class == ATA_DEV_ZAC) {
1907 hdr[2] = 0x7; /* claim SPC-5 version compatibility */
1910 memcpy(rbuf, hdr, sizeof(hdr));
1911 memcpy(&rbuf[8], "ATA ", 8);
1912 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1914 /* From SAT, use last 2 words from fw rev unless they are spaces */
1915 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
1916 if (strncmp(&rbuf[32], " ", 4) == 0)
1917 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1919 if (rbuf[32] == 0 || rbuf[32] == ' ')
1920 memcpy(&rbuf[32], "n/a ", 4);
1922 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC)
1923 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc));
1925 memcpy(rbuf + 58, versions, sizeof(versions));
1931 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1932 * @args: device IDENTIFY data / SCSI command of interest.
1933 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1935 * Returns list of inquiry VPD pages available.
1938 * spin_lock_irqsave(host lock)
1940 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1943 static const u8 pages[] = {
1944 0x00, /* page 0x00, this page */
1945 0x80, /* page 0x80, unit serial no page */
1946 0x83, /* page 0x83, device ident page */
1947 0x89, /* page 0x89, ata info page */
1948 0xb0, /* page 0xb0, block limits page */
1949 0xb1, /* page 0xb1, block device characteristics page */
1950 0xb2, /* page 0xb2, thin provisioning page */
1951 0xb6, /* page 0xb6, zoned block device characteristics */
1954 num_pages = sizeof(pages);
1955 if (!(args->dev->flags & ATA_DFLAG_ZAC))
1957 rbuf[3] = num_pages; /* number of supported VPD pages */
1958 memcpy(rbuf + 4, pages, num_pages);
1963 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1964 * @args: device IDENTIFY data / SCSI command of interest.
1965 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1967 * Returns ATA device serial number.
1970 * spin_lock_irqsave(host lock)
1972 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
1974 static const u8 hdr[] = {
1976 0x80, /* this page code */
1978 ATA_ID_SERNO_LEN, /* page len */
1981 memcpy(rbuf, hdr, sizeof(hdr));
1982 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1983 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1988 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1989 * @args: device IDENTIFY data / SCSI command of interest.
1990 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1992 * Yields two logical unit device identification designators:
1993 * - vendor specific ASCII containing the ATA serial number
1994 * - SAT defined "t10 vendor id based" containing ASCII vendor
1995 * name ("ATA "), model and serial numbers.
1998 * spin_lock_irqsave(host lock)
2000 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2002 const int sat_model_serial_desc_len = 68;
2005 rbuf[1] = 0x83; /* this page code */
2008 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2010 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2012 ata_id_string(args->id, (unsigned char *) rbuf + num,
2013 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2014 num += ATA_ID_SERNO_LEN;
2016 /* SAT defined lu model and serial numbers descriptor */
2017 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2020 rbuf[num + 3] = sat_model_serial_desc_len;
2022 memcpy(rbuf + num, "ATA ", 8);
2024 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2026 num += ATA_ID_PROD_LEN;
2027 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2029 num += ATA_ID_SERNO_LEN;
2031 if (ata_id_has_wwn(args->id)) {
2032 /* SAT defined lu world wide name */
2033 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2036 rbuf[num + 3] = ATA_ID_WWN_LEN;
2038 ata_id_string(args->id, (unsigned char *) rbuf + num,
2039 ATA_ID_WWN, ATA_ID_WWN_LEN);
2040 num += ATA_ID_WWN_LEN;
2042 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2047 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2048 * @args: device IDENTIFY data / SCSI command of interest.
2049 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2051 * Yields SAT-specified ATA VPD page.
2054 * spin_lock_irqsave(host lock)
2056 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2058 rbuf[1] = 0x89; /* our page code */
2059 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2060 rbuf[3] = (0x238 & 0xff);
2062 memcpy(&rbuf[8], "linux ", 8);
2063 memcpy(&rbuf[16], "libata ", 16);
2064 memcpy(&rbuf[32], DRV_VERSION, 4);
2066 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2067 rbuf[37] = (1 << 7); /* bit 7 indicates Command FIS */
2070 /* we don't store the ATA device signature, so we fake it */
2071 rbuf[38] = ATA_DRDY; /* really, this is Status reg */
2075 rbuf[56] = ATA_CMD_ID_ATA;
2077 memcpy(&rbuf[60], &args->id[0], 512);
2081 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2083 struct ata_device *dev = args->dev;
2087 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2090 * Optimal transfer length granularity.
2092 * This is always one physical block, but for disks with a smaller
2093 * logical than physical sector size we need to figure out what the
2096 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2097 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2100 * Optimal unmap granularity.
2102 * The ATA spec doesn't even know about a granularity or alignment
2103 * for the TRIM command. We can leave away most of the unmap related
2104 * VPD page entries, but we have specifify a granularity to signal
2105 * that we support some form of unmap - in thise case via WRITE SAME
2106 * with the unmap bit set.
2108 if (ata_id_has_trim(args->id)) {
2109 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM;
2111 if (dev->horkage & ATA_HORKAGE_MAX_TRIM_128M)
2112 max_blocks = 128 << (20 - SECTOR_SHIFT);
2114 put_unaligned_be64(max_blocks, &rbuf[36]);
2115 put_unaligned_be32(1, &rbuf[28]);
2121 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2123 int form_factor = ata_id_form_factor(args->id);
2124 int media_rotation_rate = ata_id_rotation_rate(args->id);
2125 u8 zoned = ata_id_zoned_cap(args->id);
2129 rbuf[4] = media_rotation_rate >> 8;
2130 rbuf[5] = media_rotation_rate;
2131 rbuf[7] = form_factor;
2133 rbuf[8] = (zoned << 4);
2138 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2140 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2143 rbuf[5] = 1 << 6; /* TPWS */
2148 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf)
2151 * zbc-r05 SCSI Zoned Block device characteristics VPD page
2157 * URSWRZ bit is only meaningful for host-managed ZAC drives
2159 if (args->dev->zac_zoned_cap & 1)
2161 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]);
2162 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]);
2163 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]);
2169 * modecpy - Prepare response for MODE SENSE
2170 * @dest: output buffer
2171 * @src: data being copied
2172 * @n: length of mode page
2173 * @changeable: whether changeable parameters are requested
2175 * Generate a generic MODE SENSE page for either current or changeable
2181 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2184 memcpy(dest, src, 2);
2185 memset(dest + 2, 0, n - 2);
2187 memcpy(dest, src, n);
2192 * ata_msense_caching - Simulate MODE SENSE caching info page
2193 * @id: device IDENTIFY data
2194 * @buf: output buffer
2195 * @changeable: whether changeable parameters are requested
2197 * Generate a caching info page, which conditionally indicates
2198 * write caching to the SCSI layer, depending on device
2204 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2206 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2208 buf[2] |= (1 << 2); /* ata_mselect_caching() */
2210 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */
2211 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */
2213 return sizeof(def_cache_mpage);
2217 * ata_msense_control - Simulate MODE SENSE control mode page
2218 * @dev: ATA device of interest
2219 * @buf: output buffer
2220 * @changeable: whether changeable parameters are requested
2222 * Generate a generic MODE SENSE control mode page.
2227 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf,
2230 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2232 buf[2] |= (1 << 2); /* ata_mselect_control() */
2234 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
2236 buf[2] |= (d_sense << 2); /* descriptor format sense data */
2238 return sizeof(def_control_mpage);
2242 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2243 * @buf: output buffer
2244 * @changeable: whether changeable parameters are requested
2246 * Generate a generic MODE SENSE r/w error recovery page.
2251 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2253 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2255 return sizeof(def_rw_recovery_mpage);
2259 * We can turn this into a real blacklist if it's needed, for now just
2260 * blacklist any Maxtor BANC1G10 revision firmware
2262 static int ata_dev_supports_fua(u16 *id)
2264 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2268 if (!ata_id_has_fua(id))
2271 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2272 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2274 if (strcmp(model, "Maxtor"))
2276 if (strcmp(fw, "BANC1G10"))
2279 return 0; /* blacklisted */
2283 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2284 * @args: device IDENTIFY data / SCSI command of interest.
2285 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2287 * Simulate MODE SENSE commands. Assume this is invoked for direct
2288 * access devices (e.g. disks) only. There should be no block
2289 * descriptor for other device types.
2292 * spin_lock_irqsave(host lock)
2294 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2296 struct ata_device *dev = args->dev;
2297 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2298 static const u8 sat_blk_desc[] = {
2299 0, 0, 0, 0, /* number of blocks: sat unspecified */
2301 0, 0x2, 0x0 /* block length: 512 bytes */
2304 unsigned int ebd, page_control, six_byte;
2305 u8 dpofua, bp = 0xff;
2310 six_byte = (scsicmd[0] == MODE_SENSE);
2311 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2313 * LLBA bit in msense(10) ignored (compliant)
2316 page_control = scsicmd[2] >> 6;
2317 switch (page_control) {
2318 case 0: /* current */
2319 case 1: /* changeable */
2320 case 2: /* defaults */
2321 break; /* supported */
2323 goto saving_not_supp;
2331 p += 4 + (ebd ? 8 : 0);
2333 p += 8 + (ebd ? 8 : 0);
2335 pg = scsicmd[2] & 0x3f;
2338 * No mode subpages supported (yet) but asking for _all_
2339 * subpages may be valid
2341 if (spg && (spg != ALL_SUB_MPAGES)) {
2347 case RW_RECOVERY_MPAGE:
2348 p += ata_msense_rw_recovery(p, page_control == 1);
2352 p += ata_msense_caching(args->id, p, page_control == 1);
2356 p += ata_msense_control(args->dev, p, page_control == 1);
2360 p += ata_msense_rw_recovery(p, page_control == 1);
2361 p += ata_msense_caching(args->id, p, page_control == 1);
2362 p += ata_msense_control(args->dev, p, page_control == 1);
2365 default: /* invalid page code */
2371 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2372 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2376 rbuf[0] = p - rbuf - 1;
2379 rbuf[3] = sizeof(sat_blk_desc);
2380 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2383 unsigned int output_len = p - rbuf - 2;
2385 rbuf[0] = output_len >> 8;
2386 rbuf[1] = output_len;
2389 rbuf[7] = sizeof(sat_blk_desc);
2390 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2396 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp);
2400 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2401 /* "Saving parameters not supported" */
2406 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2407 * @args: device IDENTIFY data / SCSI command of interest.
2408 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2410 * Simulate READ CAPACITY commands.
2415 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2417 struct ata_device *dev = args->dev;
2418 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2419 u32 sector_size; /* physical sector size in bytes */
2423 sector_size = ata_id_logical_sector_size(dev->id);
2424 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2425 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2429 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2430 if (last_lba >= 0xffffffffULL)
2431 last_lba = 0xffffffff;
2433 /* sector count, 32-bit */
2434 rbuf[0] = last_lba >> (8 * 3);
2435 rbuf[1] = last_lba >> (8 * 2);
2436 rbuf[2] = last_lba >> (8 * 1);
2440 rbuf[4] = sector_size >> (8 * 3);
2441 rbuf[5] = sector_size >> (8 * 2);
2442 rbuf[6] = sector_size >> (8 * 1);
2443 rbuf[7] = sector_size;
2445 /* sector count, 64-bit */
2446 rbuf[0] = last_lba >> (8 * 7);
2447 rbuf[1] = last_lba >> (8 * 6);
2448 rbuf[2] = last_lba >> (8 * 5);
2449 rbuf[3] = last_lba >> (8 * 4);
2450 rbuf[4] = last_lba >> (8 * 3);
2451 rbuf[5] = last_lba >> (8 * 2);
2452 rbuf[6] = last_lba >> (8 * 1);
2456 rbuf[ 8] = sector_size >> (8 * 3);
2457 rbuf[ 9] = sector_size >> (8 * 2);
2458 rbuf[10] = sector_size >> (8 * 1);
2459 rbuf[11] = sector_size;
2462 rbuf[13] = log2_per_phys;
2463 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2464 rbuf[15] = lowest_aligned;
2466 if (ata_id_has_trim(args->id) &&
2467 !(dev->horkage & ATA_HORKAGE_NOTRIM)) {
2468 rbuf[14] |= 0x80; /* LBPME */
2470 if (ata_id_has_zero_after_trim(args->id) &&
2471 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) {
2472 ata_dev_info(dev, "Enabling discard_zeroes_data\n");
2473 rbuf[14] |= 0x40; /* LBPRZ */
2476 if (ata_id_zoned_cap(args->id) ||
2477 args->dev->class == ATA_DEV_ZAC)
2478 rbuf[12] = (1 << 4); /* RC_BASIS */
2484 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2485 * @args: device IDENTIFY data / SCSI command of interest.
2486 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2488 * Simulate REPORT LUNS command.
2491 * spin_lock_irqsave(host lock)
2493 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2496 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2501 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2503 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2504 /* FIXME: not quite right; we don't want the
2505 * translation of taskfile registers into
2506 * a sense descriptors, since that's only
2507 * correct for ATA, not ATAPI
2509 ata_gen_passthru_sense(qc);
2515 /* is it pointless to prefer PIO for "safety reasons"? */
2516 static inline int ata_pio_use_silly(struct ata_port *ap)
2518 return (ap->flags & ATA_FLAG_PIO_DMA);
2521 static void atapi_request_sense(struct ata_queued_cmd *qc)
2523 struct ata_port *ap = qc->ap;
2524 struct scsi_cmnd *cmd = qc->scsicmd;
2526 DPRINTK("ATAPI request sense\n");
2528 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2530 #ifdef CONFIG_ATA_SFF
2531 if (ap->ops->sff_tf_read)
2532 ap->ops->sff_tf_read(ap, &qc->tf);
2535 /* fill these in, for the case where they are -not- overwritten */
2536 cmd->sense_buffer[0] = 0x70;
2537 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2541 /* setup sg table and init transfer direction */
2542 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2543 ata_sg_init(qc, &qc->sgent, 1);
2544 qc->dma_dir = DMA_FROM_DEVICE;
2546 memset(&qc->cdb, 0, qc->dev->cdb_len);
2547 qc->cdb[0] = REQUEST_SENSE;
2548 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2550 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2551 qc->tf.command = ATA_CMD_PACKET;
2553 if (ata_pio_use_silly(ap)) {
2554 qc->tf.protocol = ATAPI_PROT_DMA;
2555 qc->tf.feature |= ATAPI_PKT_DMA;
2557 qc->tf.protocol = ATAPI_PROT_PIO;
2558 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2561 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2563 qc->complete_fn = atapi_sense_complete;
2571 * ATAPI devices typically report zero for their SCSI version, and sometimes
2572 * deviate from the spec WRT response data format. If SCSI version is
2573 * reported as zero like normal, then we make the following fixups:
2574 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a
2576 * 2) Ensure response data format / ATAPI information are always correct.
2578 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd)
2582 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2587 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2590 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2592 struct scsi_cmnd *cmd = qc->scsicmd;
2593 unsigned int err_mask = qc->err_mask;
2595 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2597 /* handle completion from new EH */
2598 if (unlikely(qc->ap->ops->error_handler &&
2599 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2601 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2602 /* FIXME: not quite right; we don't want the
2603 * translation of taskfile registers into a
2604 * sense descriptors, since that's only
2605 * correct for ATA, not ATAPI
2607 ata_gen_passthru_sense(qc);
2610 /* SCSI EH automatically locks door if sdev->locked is
2611 * set. Sometimes door lock request continues to
2612 * fail, for example, when no media is present. This
2613 * creates a loop - SCSI EH issues door lock which
2614 * fails and gets invoked again to acquire sense data
2615 * for the failed command.
2617 * If door lock fails, always clear sdev->locked to
2618 * avoid this infinite loop.
2620 * This may happen before SCSI scan is complete. Make
2621 * sure qc->dev->sdev isn't NULL before dereferencing.
2623 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2624 qc->dev->sdev->locked = 0;
2626 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2631 /* successful completion or old EH failure path */
2632 if (unlikely(err_mask & AC_ERR_DEV)) {
2633 cmd->result = SAM_STAT_CHECK_CONDITION;
2634 atapi_request_sense(qc);
2636 } else if (unlikely(err_mask)) {
2637 /* FIXME: not quite right; we don't want the
2638 * translation of taskfile registers into
2639 * a sense descriptors, since that's only
2640 * correct for ATA, not ATAPI
2642 ata_gen_passthru_sense(qc);
2644 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0)
2645 atapi_fixup_inquiry(cmd);
2646 cmd->result = SAM_STAT_GOOD;
2652 * atapi_xlat - Initialize PACKET taskfile
2653 * @qc: command structure to be initialized
2656 * spin_lock_irqsave(host lock)
2659 * Zero on success, non-zero on failure.
2661 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2663 struct scsi_cmnd *scmd = qc->scsicmd;
2664 struct ata_device *dev = qc->dev;
2665 int nodata = (scmd->sc_data_direction == DMA_NONE);
2666 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2667 unsigned int nbytes;
2669 memset(qc->cdb, 0, dev->cdb_len);
2670 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2672 qc->complete_fn = atapi_qc_complete;
2674 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2675 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2676 qc->tf.flags |= ATA_TFLAG_WRITE;
2677 DPRINTK("direction: write\n");
2680 qc->tf.command = ATA_CMD_PACKET;
2681 ata_qc_set_pc_nbytes(qc);
2683 /* check whether ATAPI DMA is safe */
2684 if (!nodata && !using_pio && atapi_check_dma(qc))
2687 /* Some controller variants snoop this value for Packet
2688 * transfers to do state machine and FIFO management. Thus we
2689 * want to set it properly, and for DMA where it is
2690 * effectively meaningless.
2692 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2694 /* Most ATAPI devices which honor transfer chunk size don't
2695 * behave according to the spec when odd chunk size which
2696 * matches the transfer length is specified. If the number of
2697 * bytes to transfer is 2n+1. According to the spec, what
2698 * should happen is to indicate that 2n+1 is going to be
2699 * transferred and transfer 2n+2 bytes where the last byte is
2702 * In practice, this doesn't happen. ATAPI devices first
2703 * indicate and transfer 2n bytes and then indicate and
2704 * transfer 2 bytes where the last byte is padding.
2706 * This inconsistency confuses several controllers which
2707 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2708 * These controllers use actual number of transferred bytes to
2709 * update DMA pointer and transfer of 4n+2 bytes make those
2710 * controller push DMA pointer by 4n+4 bytes because SATA data
2711 * FISes are aligned to 4 bytes. This causes data corruption
2712 * and buffer overrun.
2714 * Always setting nbytes to even number solves this problem
2715 * because then ATAPI devices don't have to split data at 2n
2721 qc->tf.lbam = (nbytes & 0xFF);
2722 qc->tf.lbah = (nbytes >> 8);
2725 qc->tf.protocol = ATAPI_PROT_NODATA;
2727 qc->tf.protocol = ATAPI_PROT_PIO;
2730 qc->tf.protocol = ATAPI_PROT_DMA;
2731 qc->tf.feature |= ATAPI_PKT_DMA;
2733 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2734 (scmd->sc_data_direction != DMA_TO_DEVICE))
2735 /* some SATA bridges need us to indicate data xfer direction */
2736 qc->tf.feature |= ATAPI_DMADIR;
2740 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2741 as ATAPI tape drives don't get this right otherwise */
2745 static struct ata_device *ata_find_dev(struct ata_port *ap, unsigned int devno)
2748 * For the non-PMP case, ata_link_max_devices() returns 1 (SATA case),
2749 * or 2 (IDE master + slave case). However, the former case includes
2750 * libsas hosted devices which are numbered per scsi host, leading
2751 * to devno potentially being larger than 0 but with each struct
2752 * ata_device having its own struct ata_port and struct ata_link.
2753 * To accommodate these, ignore devno and always use device number 0.
2755 if (likely(!sata_pmp_attached(ap))) {
2756 int link_max_devices = ata_link_max_devices(&ap->link);
2758 if (link_max_devices == 1)
2759 return &ap->link.device[0];
2761 if (devno < link_max_devices)
2762 return &ap->link.device[devno];
2768 * For PMP-attached devices, the device number corresponds to C
2769 * (channel) of SCSI [H:C:I:L], indicating the port pmp link
2772 if (devno < ap->nr_pmp_links)
2773 return &ap->pmp_link[devno].device[0];
2778 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2779 const struct scsi_device *scsidev)
2783 /* skip commands not addressed to targets we simulate */
2784 if (!sata_pmp_attached(ap)) {
2785 if (unlikely(scsidev->channel || scsidev->lun))
2787 devno = scsidev->id;
2789 if (unlikely(scsidev->id || scsidev->lun))
2791 devno = scsidev->channel;
2794 return ata_find_dev(ap, devno);
2798 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2799 * @ap: ATA port to which the device is attached
2800 * @scsidev: SCSI device from which we derive the ATA device
2802 * Given various information provided in struct scsi_cmnd,
2803 * map that onto an ATA bus, and using that mapping
2804 * determine which ata_device is associated with the
2805 * SCSI command to be sent.
2808 * spin_lock_irqsave(host lock)
2811 * Associated ATA device, or %NULL if not found.
2814 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2816 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2818 if (unlikely(!dev || !ata_dev_enabled(dev)))
2825 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2826 * @byte1: Byte 1 from pass-thru CDB.
2829 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2832 ata_scsi_map_proto(u8 byte1)
2834 switch((byte1 & 0x1e) >> 1) {
2835 case 3: /* Non-data */
2836 return ATA_PROT_NODATA;
2839 case 10: /* UDMA Data-in */
2840 case 11: /* UDMA Data-Out */
2841 return ATA_PROT_DMA;
2843 case 4: /* PIO Data-in */
2844 case 5: /* PIO Data-out */
2845 return ATA_PROT_PIO;
2847 case 12: /* FPDMA */
2848 return ATA_PROT_NCQ;
2850 case 0: /* Hard Reset */
2852 case 8: /* Device Diagnostic */
2853 case 9: /* Device Reset */
2854 case 7: /* DMA Queued */
2855 case 15: /* Return Response Info */
2856 default: /* Reserved */
2860 return ATA_PROT_UNKNOWN;
2864 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2865 * @qc: command structure to be initialized
2867 * Handles either 12, 16, or 32-byte versions of the CDB.
2870 * Zero on success, non-zero on failure.
2872 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2874 struct ata_taskfile *tf = &(qc->tf);
2875 struct scsi_cmnd *scmd = qc->scsicmd;
2876 struct ata_device *dev = qc->dev;
2877 const u8 *cdb = scmd->cmnd;
2881 /* 7Fh variable length cmd means a ata pass-thru(32) */
2882 if (cdb[0] == VARIABLE_LENGTH_CMD)
2885 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]);
2886 if (tf->protocol == ATA_PROT_UNKNOWN) {
2891 if ((cdb[2 + cdb_offset] & 0x3) == 0) {
2893 * When T_LENGTH is zero (No data is transferred), dir should
2896 if (scmd->sc_data_direction != DMA_NONE) {
2897 fp = 2 + cdb_offset;
2901 if (ata_is_ncq(tf->protocol))
2902 tf->protocol = ATA_PROT_NCQ_NODATA;
2906 tf->flags |= ATA_TFLAG_LBA;
2909 * 12 and 16 byte CDBs use different offsets to
2910 * provide the various register values.
2912 if (cdb[0] == ATA_16) {
2914 * 16-byte CDB - may contain extended commands.
2916 * If that is the case, copy the upper byte register values.
2918 if (cdb[1] & 0x01) {
2919 tf->hob_feature = cdb[3];
2920 tf->hob_nsect = cdb[5];
2921 tf->hob_lbal = cdb[7];
2922 tf->hob_lbam = cdb[9];
2923 tf->hob_lbah = cdb[11];
2924 tf->flags |= ATA_TFLAG_LBA48;
2926 tf->flags &= ~ATA_TFLAG_LBA48;
2929 * Always copy low byte, device and command registers.
2931 tf->feature = cdb[4];
2936 tf->device = cdb[13];
2937 tf->command = cdb[14];
2938 } else if (cdb[0] == ATA_12) {
2940 * 12-byte CDB - incapable of extended commands.
2942 tf->flags &= ~ATA_TFLAG_LBA48;
2944 tf->feature = cdb[3];
2949 tf->device = cdb[8];
2950 tf->command = cdb[9];
2953 * 32-byte CDB - may contain extended command fields.
2955 * If that is the case, copy the upper byte register values.
2957 if (cdb[10] & 0x01) {
2958 tf->hob_feature = cdb[20];
2959 tf->hob_nsect = cdb[22];
2960 tf->hob_lbal = cdb[16];
2961 tf->hob_lbam = cdb[15];
2962 tf->hob_lbah = cdb[14];
2963 tf->flags |= ATA_TFLAG_LBA48;
2965 tf->flags &= ~ATA_TFLAG_LBA48;
2967 tf->feature = cdb[21];
2968 tf->nsect = cdb[23];
2972 tf->device = cdb[24];
2973 tf->command = cdb[25];
2974 tf->auxiliary = get_unaligned_be32(&cdb[28]);
2977 /* For NCQ commands copy the tag value */
2978 if (ata_is_ncq(tf->protocol))
2979 tf->nsect = qc->hw_tag << 3;
2981 /* enforce correct master/slave bit */
2982 tf->device = dev->devno ?
2983 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2985 switch (tf->command) {
2986 /* READ/WRITE LONG use a non-standard sect_size */
2987 case ATA_CMD_READ_LONG:
2988 case ATA_CMD_READ_LONG_ONCE:
2989 case ATA_CMD_WRITE_LONG:
2990 case ATA_CMD_WRITE_LONG_ONCE:
2991 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) {
2995 qc->sect_size = scsi_bufflen(scmd);
2998 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2999 case ATA_CMD_CFA_WRITE_NE:
3000 case ATA_CMD_CFA_TRANS_SECT:
3001 case ATA_CMD_CFA_WRITE_MULT_NE:
3002 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3004 case ATA_CMD_READ_EXT:
3005 case ATA_CMD_READ_QUEUED:
3006 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3007 case ATA_CMD_FPDMA_READ:
3008 case ATA_CMD_READ_MULTI:
3009 case ATA_CMD_READ_MULTI_EXT:
3010 case ATA_CMD_PIO_READ:
3011 case ATA_CMD_PIO_READ_EXT:
3012 case ATA_CMD_READ_STREAM_DMA_EXT:
3013 case ATA_CMD_READ_STREAM_EXT:
3014 case ATA_CMD_VERIFY:
3015 case ATA_CMD_VERIFY_EXT:
3017 case ATA_CMD_WRITE_EXT:
3018 case ATA_CMD_WRITE_FUA_EXT:
3019 case ATA_CMD_WRITE_QUEUED:
3020 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
3021 case ATA_CMD_FPDMA_WRITE:
3022 case ATA_CMD_WRITE_MULTI:
3023 case ATA_CMD_WRITE_MULTI_EXT:
3024 case ATA_CMD_WRITE_MULTI_FUA_EXT:
3025 case ATA_CMD_PIO_WRITE:
3026 case ATA_CMD_PIO_WRITE_EXT:
3027 case ATA_CMD_WRITE_STREAM_DMA_EXT:
3028 case ATA_CMD_WRITE_STREAM_EXT:
3029 qc->sect_size = scmd->device->sector_size;
3032 /* Everything else uses 512 byte "sectors" */
3034 qc->sect_size = ATA_SECT_SIZE;
3038 * Set flags so that all registers will be written, pass on
3039 * write indication (used for PIO/DMA setup), result TF is
3040 * copied back and we don't whine too much about its failure.
3042 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3043 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3044 tf->flags |= ATA_TFLAG_WRITE;
3046 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3049 * Set transfer length.
3051 * TODO: find out if we need to do more here to
3052 * cover scatter/gather case.
3054 ata_qc_set_pc_nbytes(qc);
3056 /* We may not issue DMA commands if no DMA mode is set */
3057 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) {
3062 /* We may not issue NCQ commands to devices not supporting NCQ */
3063 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) {
3068 /* sanity check for pio multi commands */
3069 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) {
3074 if (is_multi_taskfile(tf)) {
3075 unsigned int multi_count = 1 << (cdb[1] >> 5);
3077 /* compare the passed through multi_count
3078 * with the cached multi_count of libata
3080 if (multi_count != dev->multi_count)
3081 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3086 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3087 * SET_FEATURES - XFER MODE must be preceded/succeeded
3088 * by an update to hardware-specific registers for each
3089 * controller (i.e. the reason for ->set_piomode(),
3090 * ->set_dmamode(), and ->post_set_mode() hooks).
3092 if (tf->command == ATA_CMD_SET_FEATURES &&
3093 tf->feature == SETFEATURES_XFER) {
3094 fp = (cdb[0] == ATA_16) ? 4 : 3;
3099 * Filter TPM commands by default. These provide an
3100 * essentially uncontrolled encrypted "back door" between
3101 * applications and the disk. Set libata.allow_tpm=1 if you
3102 * have a real reason for wanting to use them. This ensures
3103 * that installed software cannot easily mess stuff up without
3104 * user intent. DVR type users will probably ship with this enabled
3105 * for movie content management.
3107 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3108 * for this and should do in future but that it is not sufficient as
3109 * DCS is an optional feature set. Thus we also do the software filter
3110 * so that we comply with the TC consortium stated goal that the user
3111 * can turn off TC features of their system.
3113 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) {
3114 fp = (cdb[0] == ATA_16) ? 14 : 9;
3121 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff);
3126 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim
3127 * @cmd: SCSI command being translated
3128 * @trmax: Maximum number of entries that will fit in sector_size bytes.
3129 * @sector: Starting sector
3130 * @count: Total Range of request in logical sectors
3132 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted
3135 * Upto 64 entries of the format:
3136 * 63:48 Range Length
3139 * Range Length of 0 is ignored.
3140 * LBA's should be sorted order and not overlap.
3142 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET
3144 * Return: Number of bytes copied into sglist.
3146 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax,
3147 u64 sector, u32 count)
3149 struct scsi_device *sdp = cmd->device;
3150 size_t len = sdp->sector_size;
3154 unsigned long flags;
3156 WARN_ON(len > ATA_SCSI_RBUF_SIZE);
3158 if (len > ATA_SCSI_RBUF_SIZE)
3159 len = ATA_SCSI_RBUF_SIZE;
3161 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
3162 buf = ((void *)ata_scsi_rbuf);
3163 memset(buf, 0, len);
3165 u64 entry = sector |
3166 ((u64)(count > 0xffff ? 0xffff : count) << 48);
3167 buf[i++] = __cpu_to_le64(entry);
3168 if (count <= 0xffff)
3173 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len);
3174 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
3180 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same
3181 * @qc: Command to be translated
3183 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or
3184 * an SCT Write Same command.
3185 * Based on WRITE SAME has the UNMAP flag:
3187 * - When set translate to DSM TRIM
3188 * - When clear translate to SCT Write Same
3190 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3192 struct ata_taskfile *tf = &qc->tf;
3193 struct scsi_cmnd *scmd = qc->scsicmd;
3194 struct scsi_device *sdp = scmd->device;
3195 size_t len = sdp->sector_size;
3196 struct ata_device *dev = qc->dev;
3197 const u8 *cdb = scmd->cmnd;
3200 const u32 trmax = len >> 3;
3204 u8 unmap = cdb[1] & 0x8;
3206 /* we may not issue DMA commands if no DMA mode is set */
3207 if (unlikely(!dev->dma_mode))
3208 goto invalid_opcode;
3211 * We only allow sending this command through the block layer,
3212 * as it modifies the DATA OUT buffer, which would corrupt user
3213 * memory for SG_IO commands.
3215 if (unlikely(blk_rq_is_passthrough(scmd->request)))
3216 goto invalid_opcode;
3218 if (unlikely(scmd->cmd_len < 16)) {
3222 scsi_16_lba_len(cdb, &block, &n_block);
3225 (dev->horkage & ATA_HORKAGE_NOTRIM) ||
3226 !ata_id_has_trim(dev->id)) {
3231 /* If the request is too large the cmd is invalid */
3232 if (n_block > 0xffff * trmax) {
3238 * WRITE SAME always has a sector sized buffer as payload, this
3239 * should never be a multiple entry S/G list.
3241 if (!scsi_sg_count(scmd))
3242 goto invalid_param_len;
3245 * size must match sector size in bytes
3246 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count)
3247 * is defined as number of 512 byte blocks to be transferred.
3250 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block);
3252 goto invalid_param_len;
3254 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3255 /* Newer devices support queued TRIM commands */
3256 tf->protocol = ATA_PROT_NCQ;
3257 tf->command = ATA_CMD_FPDMA_SEND;
3258 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3259 tf->nsect = qc->hw_tag << 3;
3260 tf->hob_feature = (size / 512) >> 8;
3261 tf->feature = size / 512;
3265 tf->protocol = ATA_PROT_DMA;
3266 tf->hob_feature = 0;
3267 tf->feature = ATA_DSM_TRIM;
3268 tf->hob_nsect = (size / 512) >> 8;
3269 tf->nsect = size / 512;
3270 tf->command = ATA_CMD_DSM;
3273 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3276 ata_qc_set_pc_nbytes(qc);
3281 ata_scsi_set_invalid_field(dev, scmd, fp, bp);
3284 /* "Parameter list length error" */
3285 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3288 /* "Invalid command operation code" */
3289 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0);
3294 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN
3295 * @args: device MAINTENANCE_IN data / SCSI command of interest.
3296 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
3298 * Yields a subset to satisfy scsi_report_opcode()
3301 * spin_lock_irqsave(host lock)
3303 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf)
3305 struct ata_device *dev = args->dev;
3306 u8 *cdb = args->cmd->cmnd;
3308 unsigned int err = 0;
3311 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]);
3320 case SERVICE_ACTION_IN_16:
3323 case SYNCHRONIZE_CACHE:
3324 case SYNCHRONIZE_CACHE_16:
3328 case TEST_UNIT_READY:
3329 case SEND_DIAGNOSTIC:
3330 case MAINTENANCE_IN:
3342 case MODE_SELECT_10:
3348 if (ata_id_zoned_cap(dev->id) ||
3349 dev->class == ATA_DEV_ZAC)
3352 case SECURITY_PROTOCOL_IN:
3353 case SECURITY_PROTOCOL_OUT:
3354 if (dev->flags & ATA_DFLAG_TRUSTED)
3361 rbuf[1] = supported; /* supported */
3366 * ata_scsi_report_zones_complete - convert ATA output
3367 * @qc: command structure returning the data
3369 * Convert T-13 little-endian field representation into
3370 * T-10 big-endian field representation.
3373 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc)
3375 struct scsi_cmnd *scmd = qc->scsicmd;
3376 struct sg_mapping_iter miter;
3377 unsigned long flags;
3378 unsigned int bytes = 0;
3380 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd),
3381 SG_MITER_TO_SG | SG_MITER_ATOMIC);
3383 local_irq_save(flags);
3384 while (sg_miter_next(&miter)) {
3385 unsigned int offset = 0;
3390 u64 max_lba, opt_lba;
3393 /* Swizzle header */
3395 list_length = get_unaligned_le32(&hdr[0]);
3396 same = get_unaligned_le16(&hdr[4]);
3397 max_lba = get_unaligned_le64(&hdr[8]);
3398 opt_lba = get_unaligned_le64(&hdr[16]);
3399 put_unaligned_be32(list_length, &hdr[0]);
3400 hdr[4] = same & 0xf;
3401 put_unaligned_be64(max_lba, &hdr[8]);
3402 put_unaligned_be64(opt_lba, &hdr[16]);
3406 while (offset < miter.length) {
3408 u8 cond, type, non_seq, reset;
3409 u64 size, start, wp;
3411 /* Swizzle zone descriptor */
3412 rec = miter.addr + offset;
3413 type = rec[0] & 0xf;
3414 cond = (rec[1] >> 4) & 0xf;
3415 non_seq = (rec[1] & 2);
3416 reset = (rec[1] & 1);
3417 size = get_unaligned_le64(&rec[8]);
3418 start = get_unaligned_le64(&rec[16]);
3419 wp = get_unaligned_le64(&rec[24]);
3421 rec[1] = (cond << 4) | non_seq | reset;
3422 put_unaligned_be64(size, &rec[8]);
3423 put_unaligned_be64(start, &rec[16]);
3424 put_unaligned_be64(wp, &rec[24]);
3425 WARN_ON(offset + 64 > miter.length);
3430 sg_miter_stop(&miter);
3431 local_irq_restore(flags);
3433 ata_scsi_qc_complete(qc);
3436 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc)
3438 struct ata_taskfile *tf = &qc->tf;
3439 struct scsi_cmnd *scmd = qc->scsicmd;
3440 const u8 *cdb = scmd->cmnd;
3441 u16 sect, fp = (u16)-1;
3442 u8 sa, options, bp = 0xff;
3446 if (unlikely(scmd->cmd_len < 16)) {
3447 ata_dev_warn(qc->dev, "invalid cdb length %d\n",
3452 scsi_16_lba_len(cdb, &block, &n_block);
3453 if (n_block != scsi_bufflen(scmd)) {
3454 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n",
3455 n_block, scsi_bufflen(scmd));
3456 goto invalid_param_len;
3459 if (sa != ZI_REPORT_ZONES) {
3460 ata_dev_warn(qc->dev, "invalid service action %d\n", sa);
3465 * ZAC allows only for transfers in 512 byte blocks,
3466 * and uses a 16 bit value for the transfer count.
3468 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) {
3469 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block);
3470 goto invalid_param_len;
3472 sect = n_block / 512;
3473 options = cdb[14] & 0xbf;
3475 if (ata_ncq_enabled(qc->dev) &&
3476 ata_fpdma_zac_mgmt_in_supported(qc->dev)) {
3477 tf->protocol = ATA_PROT_NCQ;
3478 tf->command = ATA_CMD_FPDMA_RECV;
3479 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f;
3480 tf->nsect = qc->hw_tag << 3;
3481 tf->feature = sect & 0xff;
3482 tf->hob_feature = (sect >> 8) & 0xff;
3483 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8);
3485 tf->command = ATA_CMD_ZAC_MGMT_IN;
3486 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES;
3487 tf->protocol = ATA_PROT_DMA;
3488 tf->hob_feature = options;
3489 tf->hob_nsect = (sect >> 8) & 0xff;
3490 tf->nsect = sect & 0xff;
3492 tf->device = ATA_LBA;
3493 tf->lbah = (block >> 16) & 0xff;
3494 tf->lbam = (block >> 8) & 0xff;
3495 tf->lbal = block & 0xff;
3496 tf->hob_lbah = (block >> 40) & 0xff;
3497 tf->hob_lbam = (block >> 32) & 0xff;
3498 tf->hob_lbal = (block >> 24) & 0xff;
3500 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3501 qc->flags |= ATA_QCFLAG_RESULT_TF;
3503 ata_qc_set_pc_nbytes(qc);
3505 qc->complete_fn = ata_scsi_report_zones_complete;
3510 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
3514 /* "Parameter list length error" */
3515 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3519 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc)
3521 struct ata_taskfile *tf = &qc->tf;
3522 struct scsi_cmnd *scmd = qc->scsicmd;
3523 struct ata_device *dev = qc->dev;
3524 const u8 *cdb = scmd->cmnd;
3530 if (unlikely(scmd->cmd_len < 16)) {
3536 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) &&
3537 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) {
3542 scsi_16_lba_len(cdb, &block, &n_block);
3545 * ZAC MANAGEMENT OUT doesn't define any length
3547 goto invalid_param_len;
3550 all = cdb[14] & 0x1;
3553 * Ignore the block address (zone ID) as defined by ZBC.
3556 } else if (block >= dev->n_sectors) {
3558 * Block must be a valid zone ID (a zone start LBA).
3564 if (ata_ncq_enabled(qc->dev) &&
3565 ata_fpdma_zac_mgmt_out_supported(qc->dev)) {
3566 tf->protocol = ATA_PROT_NCQ_NODATA;
3567 tf->command = ATA_CMD_NCQ_NON_DATA;
3568 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT;
3569 tf->nsect = qc->hw_tag << 3;
3570 tf->auxiliary = sa | ((u16)all << 8);
3572 tf->protocol = ATA_PROT_NODATA;
3573 tf->command = ATA_CMD_ZAC_MGMT_OUT;
3575 tf->hob_feature = all;
3577 tf->lbah = (block >> 16) & 0xff;
3578 tf->lbam = (block >> 8) & 0xff;
3579 tf->lbal = block & 0xff;
3580 tf->hob_lbah = (block >> 40) & 0xff;
3581 tf->hob_lbam = (block >> 32) & 0xff;
3582 tf->hob_lbal = (block >> 24) & 0xff;
3583 tf->device = ATA_LBA;
3584 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3589 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
3592 /* "Parameter list length error" */
3593 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3598 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3599 * @qc: Storage for translated ATA taskfile
3600 * @buf: input buffer
3601 * @len: number of valid bytes in the input buffer
3602 * @fp: out parameter for the failed field on error
3604 * Prepare a taskfile to modify caching information for the device.
3609 static int ata_mselect_caching(struct ata_queued_cmd *qc,
3610 const u8 *buf, int len, u16 *fp)
3612 struct ata_taskfile *tf = &qc->tf;
3613 struct ata_device *dev = qc->dev;
3614 u8 mpage[CACHE_MPAGE_LEN];
3619 * The first two bytes of def_cache_mpage are a header, so offsets
3620 * in mpage are off by 2 compared to buf. Same for len.
3623 if (len != CACHE_MPAGE_LEN - 2) {
3624 if (len < CACHE_MPAGE_LEN - 2)
3627 *fp = CACHE_MPAGE_LEN - 2;
3631 wce = buf[0] & (1 << 2);
3634 * Check that read-only bits are not modified.
3636 ata_msense_caching(dev->id, mpage, false);
3637 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) {
3640 if (mpage[i + 2] != buf[i]) {
3646 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3647 tf->protocol = ATA_PROT_NODATA;
3649 tf->command = ATA_CMD_SET_FEATURES;
3650 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3655 * ata_mselect_control - Simulate MODE SELECT for control page
3656 * @qc: Storage for translated ATA taskfile
3657 * @buf: input buffer
3658 * @len: number of valid bytes in the input buffer
3659 * @fp: out parameter for the failed field on error
3661 * Prepare a taskfile to modify caching information for the device.
3666 static int ata_mselect_control(struct ata_queued_cmd *qc,
3667 const u8 *buf, int len, u16 *fp)
3669 struct ata_device *dev = qc->dev;
3670 u8 mpage[CONTROL_MPAGE_LEN];
3675 * The first two bytes of def_control_mpage are a header, so offsets
3676 * in mpage are off by 2 compared to buf. Same for len.
3679 if (len != CONTROL_MPAGE_LEN - 2) {
3680 if (len < CONTROL_MPAGE_LEN - 2)
3683 *fp = CONTROL_MPAGE_LEN - 2;
3687 d_sense = buf[0] & (1 << 2);
3690 * Check that read-only bits are not modified.
3692 ata_msense_control(dev, mpage, false);
3693 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) {
3696 if (mpage[2 + i] != buf[i]) {
3701 if (d_sense & (1 << 2))
3702 dev->flags |= ATA_DFLAG_D_SENSE;
3704 dev->flags &= ~ATA_DFLAG_D_SENSE;
3709 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands
3710 * @qc: Storage for translated ATA taskfile
3712 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3713 * Assume this is invoked for direct access devices (e.g. disks) only.
3714 * There should be no block descriptor for other device types.
3717 * spin_lock_irqsave(host lock)
3719 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3721 struct scsi_cmnd *scmd = qc->scsicmd;
3722 const u8 *cdb = scmd->cmnd;
3724 unsigned six_byte, pg_len, hdr_len, bd_len;
3729 const u8 *p = buffer;
3733 six_byte = (cdb[0] == MODE_SELECT);
3735 if (scmd->cmd_len < 5) {
3743 if (scmd->cmd_len < 9) {
3748 len = (cdb[7] << 8) + cdb[8];
3752 /* We only support PF=1, SP=0. */
3753 if ((cdb[1] & 0x11) != 0x10) {
3755 bp = (cdb[1] & 0x01) ? 1 : 5;
3759 /* Test early for possible overrun. */
3760 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
3761 goto invalid_param_len;
3763 /* Move past header and block descriptors. */
3765 goto invalid_param_len;
3767 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd),
3768 buffer, sizeof(buffer)))
3769 goto invalid_param_len;
3774 bd_len = (p[6] << 8) + p[7];
3779 goto invalid_param_len;
3780 if (bd_len != 0 && bd_len != 8) {
3781 fp = (six_byte) ? 3 : 6;
3782 fp += bd_len + hdr_len;
3791 /* Parse both possible formats for the mode page headers. */
3795 goto invalid_param_len;
3798 pg_len = (p[2] << 8) | p[3];
3803 goto invalid_param_len;
3812 * No mode subpages supported (yet) but asking for _all_
3813 * subpages may be valid
3815 if (spg && (spg != ALL_SUB_MPAGES)) {
3816 fp = (p[0] & 0x40) ? 1 : 0;
3817 fp += hdr_len + bd_len;
3821 goto invalid_param_len;
3825 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) {
3826 fp += hdr_len + bd_len;
3831 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) {
3832 fp += hdr_len + bd_len;
3835 goto skip; /* No ATA command to send */
3838 default: /* invalid page code */
3839 fp = bd_len + hdr_len;
3844 * Only one page has changeable data, so we only support setting one
3853 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
3857 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp);
3861 /* "Parameter list length error" */
3862 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3866 scmd->result = SAM_STAT_GOOD;
3870 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma)
3873 return ATA_CMD_TRUSTED_NONDATA;
3875 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND;
3877 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV;
3880 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc)
3882 struct scsi_cmnd *scmd = qc->scsicmd;
3883 const u8 *cdb = scmd->cmnd;
3884 struct ata_taskfile *tf = &qc->tf;
3886 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT);
3887 u16 spsp = get_unaligned_be16(&cdb[2]);
3888 u32 len = get_unaligned_be32(&cdb[6]);
3889 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO);
3892 * We don't support the ATA "security" protocol.
3895 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0);
3899 if (cdb[4] & 7) { /* INC_512 */
3901 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0);
3905 if (len > 0x01fffe00) {
3906 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0);
3910 /* convert to the sector-based ATA addressing */
3911 len = (len + 511) / 512;
3914 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO;
3915 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA;
3917 tf->flags |= ATA_TFLAG_WRITE;
3918 tf->command = ata_scsi_trusted_op(len, send, dma);
3920 tf->lbam = spsp & 0xff;
3921 tf->lbah = spsp >> 8;
3924 tf->nsect = len & 0xff;
3925 tf->lbal = len >> 8;
3928 tf->lbah = (1 << 7);
3931 ata_qc_set_pc_nbytes(qc);
3936 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler
3937 * @qc: Command to be translated
3939 * Translate a SCSI variable length CDB to specified commands.
3940 * It checks a service action value in CDB to call corresponding handler.
3943 * Zero on success, non-zero on failure
3946 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc)
3948 struct scsi_cmnd *scmd = qc->scsicmd;
3949 const u8 *cdb = scmd->cmnd;
3950 const u16 sa = get_unaligned_be16(&cdb[8]);
3953 * if service action represents a ata pass-thru(32) command,
3954 * then pass it to ata_scsi_pass_thru handler.
3957 return ata_scsi_pass_thru(qc);
3959 /* unsupported service action */
3964 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3966 * @cmd: SCSI command opcode to consider
3968 * Look up the SCSI command given, and determine whether the
3969 * SCSI command is to be translated or simulated.
3972 * Pointer to translation function if possible, %NULL if not.
3975 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3985 return ata_scsi_rw_xlat;
3988 return ata_scsi_write_same_xlat;
3990 case SYNCHRONIZE_CACHE:
3991 case SYNCHRONIZE_CACHE_16:
3992 if (ata_try_flush_cache(dev))
3993 return ata_scsi_flush_xlat;
3998 return ata_scsi_verify_xlat;
4002 return ata_scsi_pass_thru;
4004 case VARIABLE_LENGTH_CMD:
4005 return ata_scsi_var_len_cdb_xlat;
4008 case MODE_SELECT_10:
4009 return ata_scsi_mode_select_xlat;
4013 return ata_scsi_zbc_in_xlat;
4016 return ata_scsi_zbc_out_xlat;
4018 case SECURITY_PROTOCOL_IN:
4019 case SECURITY_PROTOCOL_OUT:
4020 if (!(dev->flags & ATA_DFLAG_TRUSTED))
4022 return ata_scsi_security_inout_xlat;
4025 return ata_scsi_start_stop_xlat;
4032 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
4033 * @ap: ATA port to which the command was being sent
4034 * @cmd: SCSI command to dump
4036 * Prints the contents of a SCSI command via printk().
4039 void ata_scsi_dump_cdb(struct ata_port *ap, struct scsi_cmnd *cmd)
4041 #ifdef ATA_VERBOSE_DEBUG
4042 struct scsi_device *scsidev = cmd->device;
4044 VPRINTK("CDB (%u:%d,%d,%lld) %9ph\n",
4046 scsidev->channel, scsidev->id, scsidev->lun,
4051 int __ata_scsi_queuecmd(struct scsi_cmnd *scmd, struct ata_device *dev)
4053 struct ata_port *ap = dev->link->ap;
4054 u8 scsi_op = scmd->cmnd[0];
4055 ata_xlat_func_t xlat_func;
4058 * scsi_queue_rq() will defer commands if scsi_host_in_recovery().
4059 * However, this check is done without holding the ap->lock (a libata
4060 * specific lock), so we can have received an error irq since then,
4061 * therefore we must check if EH is pending, while holding ap->lock.
4063 if (ap->pflags & (ATA_PFLAG_EH_PENDING | ATA_PFLAG_EH_IN_PROGRESS))
4064 return SCSI_MLQUEUE_DEVICE_BUSY;
4066 if (unlikely(!scmd->cmd_len))
4069 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
4070 if (unlikely(scmd->cmd_len > dev->cdb_len))
4073 xlat_func = ata_get_xlat_func(dev, scsi_op);
4074 } else if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
4075 /* relay SCSI command to ATAPI device */
4076 int len = COMMAND_SIZE(scsi_op);
4078 if (unlikely(len > scmd->cmd_len ||
4079 len > dev->cdb_len ||
4080 scmd->cmd_len > ATAPI_CDB_LEN))
4083 xlat_func = atapi_xlat;
4085 /* ATA_16 passthru, treat as an ATA command */
4086 if (unlikely(scmd->cmd_len > 16))
4089 xlat_func = ata_get_xlat_func(dev, scsi_op);
4093 return ata_scsi_translate(dev, scmd, xlat_func);
4095 ata_scsi_simulate(dev, scmd);
4100 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
4101 scmd->cmd_len, scsi_op, dev->cdb_len);
4102 scmd->result = DID_ERROR << 16;
4103 scmd->scsi_done(scmd);
4108 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
4109 * @shost: SCSI host of command to be sent
4110 * @cmd: SCSI command to be sent
4112 * In some cases, this function translates SCSI commands into
4113 * ATA taskfiles, and queues the taskfiles to be sent to
4114 * hardware. In other cases, this function simulates a
4115 * SCSI device by evaluating and responding to certain
4116 * SCSI commands. This creates the overall effect of
4117 * ATA and ATAPI devices appearing as SCSI devices.
4123 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4126 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
4128 struct ata_port *ap;
4129 struct ata_device *dev;
4130 struct scsi_device *scsidev = cmd->device;
4132 unsigned long irq_flags;
4134 ap = ata_shost_to_port(shost);
4136 spin_lock_irqsave(ap->lock, irq_flags);
4138 ata_scsi_dump_cdb(ap, cmd);
4140 dev = ata_scsi_find_dev(ap, scsidev);
4142 rc = __ata_scsi_queuecmd(cmd, dev);
4144 cmd->result = (DID_BAD_TARGET << 16);
4145 cmd->scsi_done(cmd);
4148 spin_unlock_irqrestore(ap->lock, irq_flags);
4152 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
4155 * ata_scsi_simulate - simulate SCSI command on ATA device
4156 * @dev: the target device
4157 * @cmd: SCSI command being sent to device.
4159 * Interprets and directly executes a select list of SCSI commands
4160 * that can be handled internally.
4163 * spin_lock_irqsave(host lock)
4166 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
4168 struct ata_scsi_args args;
4169 const u8 *scsicmd = cmd->cmnd;
4176 switch(scsicmd[0]) {
4178 if (scsicmd[1] & 2) /* is CmdDt set? */
4179 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4180 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
4181 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
4182 else switch (scsicmd[2]) {
4184 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
4187 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
4190 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
4193 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
4196 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
4199 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
4202 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
4205 if (dev->flags & ATA_DFLAG_ZAC) {
4206 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6);
4211 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
4218 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
4222 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4225 case SERVICE_ACTION_IN_16:
4226 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
4227 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4229 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4233 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
4237 ata_scsi_set_sense(dev, cmd, 0, 0, 0);
4238 cmd->result = (DRIVER_SENSE << 24);
4241 /* if we reach this, then writeback caching is disabled,
4242 * turning this into a no-op.
4244 case SYNCHRONIZE_CACHE:
4245 case SYNCHRONIZE_CACHE_16:
4248 /* no-op's, complete with success */
4252 case TEST_UNIT_READY:
4255 case SEND_DIAGNOSTIC:
4256 tmp8 = scsicmd[1] & ~(1 << 3);
4257 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4])
4258 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4261 case MAINTENANCE_IN:
4262 if ((scsicmd[1] & 0x1f) == MI_REPORT_SUPPORTED_OPERATION_CODES)
4263 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in);
4265 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4268 /* all other commands */
4270 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0);
4271 /* "Invalid command operation code" */
4275 cmd->scsi_done(cmd);
4278 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
4282 for (i = 0; i < host->n_ports; i++) {
4283 struct ata_port *ap = host->ports[i];
4284 struct Scsi_Host *shost;
4287 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
4291 shost->eh_noresume = 1;
4292 *(struct ata_port **)&shost->hostdata[0] = ap;
4293 ap->scsi_host = shost;
4295 shost->transportt = ata_scsi_transport_template;
4296 shost->unique_id = ap->print_id;
4299 shost->max_channel = 1;
4300 shost->max_cmd_len = 32;
4302 /* Schedule policy is determined by ->qc_defer()
4303 * callback and it needs to see every deferred qc.
4304 * Set host_blocked to 1 to prevent SCSI midlayer from
4305 * automatically deferring requests.
4307 shost->max_host_blocked = 1;
4309 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev);
4318 struct Scsi_Host *shost = host->ports[i]->scsi_host;
4320 /* scsi_host_put() is in ata_devres_release() */
4321 scsi_remove_host(shost);
4327 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap)
4329 struct scsi_device *sdev = dev->sdev;
4330 struct device *d = ap->host->dev;
4331 struct device_node *np = d->of_node;
4332 struct device_node *child;
4334 for_each_available_child_of_node(np, child) {
4338 ret = of_property_read_u32(child, "reg", &val);
4341 if (val == dev->devno) {
4342 dev_dbg(d, "found matching device node\n");
4343 sdev->sdev_gendev.of_node = child;
4349 static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap)
4354 void ata_scsi_scan_host(struct ata_port *ap, int sync)
4357 struct ata_device *last_failed_dev = NULL;
4358 struct ata_link *link;
4359 struct ata_device *dev;
4362 ata_for_each_link(link, ap, EDGE) {
4363 ata_for_each_dev(dev, link, ENABLED) {
4364 struct scsi_device *sdev;
4365 int channel = 0, id = 0;
4370 if (ata_is_host_link(link))
4373 channel = link->pmp;
4375 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
4377 if (!IS_ERR(sdev)) {
4379 ata_scsi_assign_ofnode(dev, ap);
4380 scsi_device_put(sdev);
4387 /* If we scanned while EH was in progress or allocation
4388 * failure occurred, scan would have failed silently. Check
4389 * whether all devices are attached.
4391 ata_for_each_link(link, ap, EDGE) {
4392 ata_for_each_dev(dev, link, ENABLED) {
4401 /* we're missing some SCSI devices */
4403 /* If caller requested synchrnous scan && we've made
4404 * any progress, sleep briefly and repeat.
4406 if (dev != last_failed_dev) {
4408 last_failed_dev = dev;
4412 /* We might be failing to detect boot device, give it
4413 * a few more chances.
4421 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
4424 queue_delayed_work(system_long_wq, &ap->hotplug_task,
4425 round_jiffies_relative(HZ));
4429 * ata_scsi_offline_dev - offline attached SCSI device
4430 * @dev: ATA device to offline attached SCSI device for
4432 * This function is called from ata_eh_hotplug() and responsible
4433 * for taking the SCSI device attached to @dev offline. This
4434 * function is called with host lock which protects dev->sdev
4438 * spin_lock_irqsave(host lock)
4441 * 1 if attached SCSI device exists, 0 otherwise.
4443 int ata_scsi_offline_dev(struct ata_device *dev)
4446 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
4453 * ata_scsi_remove_dev - remove attached SCSI device
4454 * @dev: ATA device to remove attached SCSI device for
4456 * This function is called from ata_eh_scsi_hotplug() and
4457 * responsible for removing the SCSI device attached to @dev.
4460 * Kernel thread context (may sleep).
4462 static void ata_scsi_remove_dev(struct ata_device *dev)
4464 struct ata_port *ap = dev->link->ap;
4465 struct scsi_device *sdev;
4466 unsigned long flags;
4468 /* Alas, we need to grab scan_mutex to ensure SCSI device
4469 * state doesn't change underneath us and thus
4470 * scsi_device_get() always succeeds. The mutex locking can
4471 * be removed if there is __scsi_device_get() interface which
4472 * increments reference counts regardless of device state.
4474 mutex_lock(&ap->scsi_host->scan_mutex);
4475 spin_lock_irqsave(ap->lock, flags);
4477 /* clearing dev->sdev is protected by host lock */
4482 /* If user initiated unplug races with us, sdev can go
4483 * away underneath us after the host lock and
4484 * scan_mutex are released. Hold onto it.
4486 if (scsi_device_get(sdev) == 0) {
4487 /* The following ensures the attached sdev is
4488 * offline on return from ata_scsi_offline_dev()
4489 * regardless it wins or loses the race
4490 * against this function.
4492 scsi_device_set_state(sdev, SDEV_OFFLINE);
4499 spin_unlock_irqrestore(ap->lock, flags);
4500 mutex_unlock(&ap->scsi_host->scan_mutex);
4503 ata_dev_info(dev, "detaching (SCSI %s)\n",
4504 dev_name(&sdev->sdev_gendev));
4506 scsi_remove_device(sdev);
4507 scsi_device_put(sdev);
4511 static void ata_scsi_handle_link_detach(struct ata_link *link)
4513 struct ata_port *ap = link->ap;
4514 struct ata_device *dev;
4516 ata_for_each_dev(dev, link, ALL) {
4517 unsigned long flags;
4519 if (!(dev->flags & ATA_DFLAG_DETACHED))
4522 spin_lock_irqsave(ap->lock, flags);
4523 dev->flags &= ~ATA_DFLAG_DETACHED;
4524 spin_unlock_irqrestore(ap->lock, flags);
4526 if (zpodd_dev_enabled(dev))
4529 ata_scsi_remove_dev(dev);
4534 * ata_scsi_media_change_notify - send media change event
4535 * @dev: Pointer to the disk device with media change event
4537 * Tell the block layer to send a media change notification
4541 * spin_lock_irqsave(host lock)
4543 void ata_scsi_media_change_notify(struct ata_device *dev)
4546 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
4551 * ata_scsi_hotplug - SCSI part of hotplug
4552 * @work: Pointer to ATA port to perform SCSI hotplug on
4554 * Perform SCSI part of hotplug. It's executed from a separate
4555 * workqueue after EH completes. This is necessary because SCSI
4556 * hot plugging requires working EH and hot unplugging is
4557 * synchronized with hot plugging with a mutex.
4560 * Kernel thread context (may sleep).
4562 void ata_scsi_hotplug(struct work_struct *work)
4564 struct ata_port *ap =
4565 container_of(work, struct ata_port, hotplug_task.work);
4568 if (ap->pflags & ATA_PFLAG_UNLOADING) {
4569 DPRINTK("ENTER/EXIT - unloading\n");
4574 mutex_lock(&ap->scsi_scan_mutex);
4576 /* Unplug detached devices. We cannot use link iterator here
4577 * because PMP links have to be scanned even if PMP is
4578 * currently not attached. Iterate manually.
4580 ata_scsi_handle_link_detach(&ap->link);
4582 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
4583 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
4585 /* scan for new ones */
4586 ata_scsi_scan_host(ap, 0);
4588 mutex_unlock(&ap->scsi_scan_mutex);
4593 * ata_scsi_user_scan - indication for user-initiated bus scan
4594 * @shost: SCSI host to scan
4595 * @channel: Channel to scan
4599 * This function is called when user explicitly requests bus
4600 * scan. Set probe pending flag and invoke EH.
4603 * SCSI layer (we don't care)
4608 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
4609 unsigned int id, u64 lun)
4611 struct ata_port *ap = ata_shost_to_port(shost);
4612 unsigned long flags;
4615 if (!ap->ops->error_handler)
4618 if (lun != SCAN_WILD_CARD && lun)
4621 if (!sata_pmp_attached(ap)) {
4622 if (channel != SCAN_WILD_CARD && channel)
4626 if (id != SCAN_WILD_CARD && id)
4631 spin_lock_irqsave(ap->lock, flags);
4633 if (devno == SCAN_WILD_CARD) {
4634 struct ata_link *link;
4636 ata_for_each_link(link, ap, EDGE) {
4637 struct ata_eh_info *ehi = &link->eh_info;
4638 ehi->probe_mask |= ATA_ALL_DEVICES;
4639 ehi->action |= ATA_EH_RESET;
4642 struct ata_device *dev = ata_find_dev(ap, devno);
4645 struct ata_eh_info *ehi = &dev->link->eh_info;
4646 ehi->probe_mask |= 1 << dev->devno;
4647 ehi->action |= ATA_EH_RESET;
4653 ata_port_schedule_eh(ap);
4654 spin_unlock_irqrestore(ap->lock, flags);
4655 ata_port_wait_eh(ap);
4657 spin_unlock_irqrestore(ap->lock, flags);
4663 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4664 * @work: Pointer to ATA port to perform scsi_rescan_device()
4666 * After ATA pass thru (SAT) commands are executed successfully,
4667 * libata need to propagate the changes to SCSI layer.
4670 * Kernel thread context (may sleep).
4672 void ata_scsi_dev_rescan(struct work_struct *work)
4674 struct ata_port *ap =
4675 container_of(work, struct ata_port, scsi_rescan_task);
4676 struct ata_link *link;
4677 struct ata_device *dev;
4678 unsigned long flags;
4680 mutex_lock(&ap->scsi_scan_mutex);
4681 spin_lock_irqsave(ap->lock, flags);
4683 ata_for_each_link(link, ap, EDGE) {
4684 ata_for_each_dev(dev, link, ENABLED) {
4685 struct scsi_device *sdev = dev->sdev;
4689 if (scsi_device_get(sdev))
4692 spin_unlock_irqrestore(ap->lock, flags);
4693 scsi_rescan_device(&(sdev->sdev_gendev));
4694 scsi_device_put(sdev);
4695 spin_lock_irqsave(ap->lock, flags);
4699 spin_unlock_irqrestore(ap->lock, flags);
4700 mutex_unlock(&ap->scsi_scan_mutex);