2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/kernel.h>
37 #include <linux/blkdev.h>
38 #include <linux/spinlock.h>
39 #include <scsi/scsi.h>
41 #include <scsi/scsi_host.h>
42 #include <scsi/scsi_device.h>
43 #include <linux/libata.h>
44 #include <linux/hdreg.h>
45 #include <asm/uaccess.h>
49 #define SECTOR_SIZE 512
51 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd);
52 static struct ata_device *
53 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev);
55 #define RW_RECOVERY_MPAGE 0x1
56 #define RW_RECOVERY_MPAGE_LEN 12
57 #define CACHE_MPAGE 0x8
58 #define CACHE_MPAGE_LEN 20
59 #define CONTROL_MPAGE 0xa
60 #define CONTROL_MPAGE_LEN 12
61 #define ALL_MPAGES 0x3f
62 #define ALL_SUB_MPAGES 0xff
65 static const u8 def_rw_recovery_mpage[] = {
67 RW_RECOVERY_MPAGE_LEN - 2,
68 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
69 (1 << 6), /* ARRE (auto read reallocation) */
70 0, /* read retry count */
72 0, /* write retry count */
76 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
79 0, /* contains WCE, needs to be 0 for logic */
80 0, 0, 0, 0, 0, 0, 0, 0, 0,
81 0, /* contains DRA, needs to be 0 for logic */
85 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
87 CONTROL_MPAGE_LEN - 2,
88 2, /* DSENSE=0, GLTSD=1 */
89 0, /* [QAM+QERR may be 1, see 05-359r1] */
90 0, 0, 0, 0, 0xff, 0xff,
91 0, 30 /* extended self test time, see 05-359r1 */
95 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
96 void (*done)(struct scsi_cmnd *))
98 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
99 /* "Invalid field in cbd" */
104 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
105 * @sdev: SCSI device for which BIOS geometry is to be determined
106 * @bdev: block device associated with @sdev
107 * @capacity: capacity of SCSI device
108 * @geom: location to which geometry will be output
110 * Generic bios head/sector/cylinder calculator
111 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
112 * mapping. Some situations may arise where the disk is not
113 * bootable if this is not used.
116 * Defined by the SCSI layer. We don't really care.
121 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
122 sector_t capacity, int geom[])
126 sector_div(capacity, 255*63);
133 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
134 * @dev: Device to whom we are issuing command
135 * @arg: User provided data for issuing command
138 * Defined by the SCSI layer. We don't really care.
141 * Zero on success, negative errno on error.
144 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
147 u8 scsi_cmd[MAX_COMMAND_SIZE];
148 u8 args[4], *argbuf = NULL;
150 struct scsi_request *sreq;
152 if (NULL == (void *)arg)
155 if (copy_from_user(args, arg, sizeof(args)))
158 sreq = scsi_allocate_request(scsidev, GFP_KERNEL);
162 memset(scsi_cmd, 0, sizeof(scsi_cmd));
165 argsize = SECTOR_SIZE * args[3];
166 argbuf = kmalloc(argsize, GFP_KERNEL);
167 if (argbuf == NULL) {
172 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
173 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
174 block count in sector count field */
175 sreq->sr_data_direction = DMA_FROM_DEVICE;
177 scsi_cmd[1] = (3 << 1); /* Non-data */
178 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
179 sreq->sr_data_direction = DMA_NONE;
182 scsi_cmd[0] = ATA_16;
184 scsi_cmd[4] = args[2];
185 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
186 scsi_cmd[6] = args[3];
187 scsi_cmd[8] = args[1];
191 scsi_cmd[6] = args[1];
193 scsi_cmd[14] = args[0];
195 /* Good values for timeout and retries? Values below
196 from scsi_ioctl_send_command() for default case... */
197 scsi_wait_req(sreq, scsi_cmd, argbuf, argsize, (10*HZ), 5);
199 if (sreq->sr_result) {
204 /* Need code to retrieve data from check condition? */
207 && copy_to_user((void *)(arg + sizeof(args)), argbuf, argsize))
210 scsi_release_request(sreq);
219 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
220 * @dev: Device to whom we are issuing command
221 * @arg: User provided data for issuing command
224 * Defined by the SCSI layer. We don't really care.
227 * Zero on success, negative errno on error.
229 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
232 u8 scsi_cmd[MAX_COMMAND_SIZE];
234 struct scsi_request *sreq;
236 if (NULL == (void *)arg)
239 if (copy_from_user(args, arg, sizeof(args)))
242 memset(scsi_cmd, 0, sizeof(scsi_cmd));
243 scsi_cmd[0] = ATA_16;
244 scsi_cmd[1] = (3 << 1); /* Non-data */
245 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
246 scsi_cmd[4] = args[1];
247 scsi_cmd[6] = args[2];
248 scsi_cmd[8] = args[3];
249 scsi_cmd[10] = args[4];
250 scsi_cmd[12] = args[5];
251 scsi_cmd[14] = args[0];
253 sreq = scsi_allocate_request(scsidev, GFP_KERNEL);
259 sreq->sr_data_direction = DMA_NONE;
260 /* Good values for timeout and retries? Values below
261 from scsi_ioctl_send_command() for default case... */
262 scsi_wait_req(sreq, scsi_cmd, NULL, 0, (10*HZ), 5);
264 if (sreq->sr_result) {
269 /* Need code to retrieve data from check condition? */
272 scsi_release_request(sreq);
276 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
279 struct ata_device *dev;
280 int val = -EINVAL, rc = -EINVAL;
282 ap = (struct ata_port *) &scsidev->host->hostdata[0];
286 dev = ata_scsi_find_dev(ap, scsidev);
293 case ATA_IOC_GET_IO32:
295 if (copy_to_user(arg, &val, 1))
299 case ATA_IOC_SET_IO32:
300 val = (unsigned long) arg;
306 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
308 return ata_cmd_ioctl(scsidev, arg);
310 case HDIO_DRIVE_TASK:
311 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
313 return ata_task_ioctl(scsidev, arg);
325 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
326 * @ap: ATA port to which the new command is attached
327 * @dev: ATA device to which the new command is attached
328 * @cmd: SCSI command that originated this ATA command
329 * @done: SCSI command completion function
331 * Obtain a reference to an unused ata_queued_cmd structure,
332 * which is the basic libata structure representing a single
333 * ATA command sent to the hardware.
335 * If a command was available, fill in the SCSI-specific
336 * portions of the structure with information on the
340 * spin_lock_irqsave(host_set lock)
343 * Command allocated, or %NULL if none available.
345 struct ata_queued_cmd *ata_scsi_qc_new(struct ata_port *ap,
346 struct ata_device *dev,
347 struct scsi_cmnd *cmd,
348 void (*done)(struct scsi_cmnd *))
350 struct ata_queued_cmd *qc;
352 qc = ata_qc_new_init(ap, dev);
358 qc->sg = (struct scatterlist *) cmd->request_buffer;
359 qc->n_elem = cmd->use_sg;
365 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
373 * ata_dump_status - user friendly display of error info
374 * @id: id of the port in question
375 * @tf: ptr to filled out taskfile
377 * Decode and dump the ATA error/status registers for the user so
378 * that they have some idea what really happened at the non
379 * make-believe layer.
382 * inherited from caller
384 void ata_dump_status(unsigned id, struct ata_taskfile *tf)
386 u8 stat = tf->command, err = tf->feature;
388 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
389 if (stat & ATA_BUSY) {
390 printk("Busy }\n"); /* Data is not valid in this case */
392 if (stat & 0x40) printk("DriveReady ");
393 if (stat & 0x20) printk("DeviceFault ");
394 if (stat & 0x10) printk("SeekComplete ");
395 if (stat & 0x08) printk("DataRequest ");
396 if (stat & 0x04) printk("CorrectedError ");
397 if (stat & 0x02) printk("Index ");
398 if (stat & 0x01) printk("Error ");
402 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
403 if (err & 0x04) printk("DriveStatusError ");
405 if (err & 0x04) printk("BadCRC ");
406 else printk("Sector ");
408 if (err & 0x40) printk("UncorrectableError ");
409 if (err & 0x10) printk("SectorIdNotFound ");
410 if (err & 0x02) printk("TrackZeroNotFound ");
411 if (err & 0x01) printk("AddrMarkNotFound ");
418 * ata_to_sense_error - convert ATA error to SCSI error
419 * @drv_stat: value contained in ATA status register
420 * @drv_err: value contained in ATA error register
421 * @sk: the sense key we'll fill out
422 * @asc: the additional sense code we'll fill out
423 * @ascq: the additional sense code qualifier we'll fill out
425 * Converts an ATA error into a SCSI error. Fill out pointers to
426 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
427 * format sense blocks.
430 * spin_lock_irqsave(host_set lock)
432 void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
437 /* Based on the 3ware driver translation table */
438 static unsigned char sense_table[][4] = {
440 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
442 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
444 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
445 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
446 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
447 /* MC|ID|ABRT|TRK0|MARK */
448 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
450 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
451 /* Bad address mark */
452 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
454 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
456 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
457 /* Media change request */
458 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
460 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
462 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
464 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
465 /* BBD - block marked bad */
466 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
467 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
469 static unsigned char stat_table[][4] = {
470 /* Must be first because BUSY means no other bits valid */
471 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
472 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
473 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
474 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
475 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
479 * Is this an error we can process/parse
481 if (drv_stat & ATA_BUSY) {
482 drv_err = 0; /* Ignore the err bits, they're invalid */
486 /* Look for drv_err */
487 for (i = 0; sense_table[i][0] != 0xFF; i++) {
488 /* Look for best matches first */
489 if ((sense_table[i][0] & drv_err) ==
491 *sk = sense_table[i][1];
492 *asc = sense_table[i][2];
493 *ascq = sense_table[i][3];
497 /* No immediate match */
498 printk(KERN_WARNING "ata%u: no sense translation for "
499 "error 0x%02x\n", id, drv_err);
502 /* Fall back to interpreting status bits */
503 for (i = 0; stat_table[i][0] != 0xFF; i++) {
504 if (stat_table[i][0] & drv_stat) {
505 *sk = stat_table[i][1];
506 *asc = stat_table[i][2];
507 *ascq = stat_table[i][3];
511 /* No error? Undecoded? */
512 printk(KERN_WARNING "ata%u: no sense translation for status: 0x%02x\n",
515 /* For our last chance pick, use medium read error because
516 * it's much more common than an ATA drive telling you a write
520 *asc = 0x11; /* "unrecovered read error" */
521 *ascq = 0x04; /* "auto-reallocation failed" */
524 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x to "
525 "SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", id, drv_stat, drv_err,
531 * ata_gen_ata_desc_sense - Generate check condition sense block.
532 * @qc: Command that completed.
534 * This function is specific to the ATA descriptor format sense
535 * block specified for the ATA pass through commands. Regardless
536 * of whether the command errored or not, return a sense
537 * block. Copy all controller registers into the sense
538 * block. Clear sense key, ASC & ASCQ if there is no error.
541 * spin_lock_irqsave(host_set lock)
543 void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
545 struct scsi_cmnd *cmd = qc->scsicmd;
546 struct ata_taskfile *tf = &qc->tf;
547 unsigned char *sb = cmd->sense_buffer;
548 unsigned char *desc = sb + 8;
550 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
552 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
555 * Read the controller registers.
557 assert(NULL != qc->ap->ops->tf_read);
558 qc->ap->ops->tf_read(qc->ap, tf);
561 * Use ata_to_sense_error() to map status register bits
562 * onto sense key, asc & ascq.
564 if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
565 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
566 &sb[1], &sb[2], &sb[3]);
571 * Sense data is current and format is descriptor.
578 * Set length of additional sense data.
579 * Since we only populate descriptor 0, the total
580 * length is the same (fixed) length as descriptor 0.
582 desc[1] = sb[7] = 14;
585 * Copy registers into sense buffer.
588 desc[3] = tf->feature; /* == error reg */
593 desc[12] = tf->device;
594 desc[13] = tf->command; /* == status reg */
597 * Fill in Extend bit, and the high order bytes
600 if (tf->flags & ATA_TFLAG_LBA48) {
602 desc[4] = tf->hob_nsect;
603 desc[6] = tf->hob_lbal;
604 desc[8] = tf->hob_lbam;
605 desc[10] = tf->hob_lbah;
610 * ata_gen_fixed_sense - generate a SCSI fixed sense block
611 * @qc: Command that we are erroring out
613 * Leverage ata_to_sense_error() to give us the codes. Fit our
614 * LBA in here if there's room.
617 * inherited from caller
619 void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
621 struct scsi_cmnd *cmd = qc->scsicmd;
622 struct ata_taskfile *tf = &qc->tf;
623 unsigned char *sb = cmd->sense_buffer;
625 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
627 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
630 * Read the controller registers.
632 assert(NULL != qc->ap->ops->tf_read);
633 qc->ap->ops->tf_read(qc->ap, tf);
636 * Use ata_to_sense_error() to map status register bits
637 * onto sense key, asc & ascq.
639 if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
640 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
641 &sb[2], &sb[12], &sb[13]);
648 if (tf->flags & ATA_TFLAG_LBA48) {
649 /* TODO: find solution for LBA48 descriptors */
652 else if (tf->flags & ATA_TFLAG_LBA) {
653 /* A small (28b) LBA will fit in the 32b info field */
654 sb[0] |= 0x80; /* set valid bit */
655 sb[3] = tf->device & 0x0f;
667 * ata_scsi_slave_config - Set SCSI device attributes
668 * @sdev: SCSI device to examine
670 * This is called before we actually start reading
671 * and writing to the device, to configure certain
672 * SCSI mid-layer behaviors.
675 * Defined by SCSI layer. We don't really care.
678 int ata_scsi_slave_config(struct scsi_device *sdev)
680 sdev->use_10_for_rw = 1;
681 sdev->use_10_for_ms = 1;
683 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
685 if (sdev->id < ATA_MAX_DEVICES) {
687 struct ata_device *dev;
689 ap = (struct ata_port *) &sdev->host->hostdata[0];
690 dev = &ap->device[sdev->id];
692 /* TODO: 1024 is an arbitrary number, not the
693 * hardware maximum. This should be increased to
694 * 65534 when Jens Axboe's patch for dynamically
695 * determining max_sectors is merged.
697 if ((dev->flags & ATA_DFLAG_LBA48) &&
698 ((dev->flags & ATA_DFLAG_LOCK_SECTORS) == 0)) {
700 * do not overwrite sdev->host->max_sectors, since
701 * other drives on this host may not support LBA48
703 blk_queue_max_sectors(sdev->request_queue, 2048);
707 return 0; /* scsi layer doesn't check return value, sigh */
711 * ata_scsi_error - SCSI layer error handler callback
712 * @host: SCSI host on which error occurred
714 * Handles SCSI-layer-thrown error events.
717 * Inherited from SCSI layer (none, can sleep)
723 int ata_scsi_error(struct Scsi_Host *host)
729 ap = (struct ata_port *) &host->hostdata[0];
730 ap->ops->eng_timeout(ap);
732 /* TODO: this is per-command; when queueing is supported
733 * this code will either change or move to a more
737 INIT_LIST_HEAD(&host->eh_cmd_q);
744 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
745 * @qc: Storage for translated ATA taskfile
746 * @scsicmd: SCSI command to translate
748 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
749 * (to start). Perhaps these commands should be preceded by
750 * CHECK POWER MODE to see what power mode the device is already in.
751 * [See SAT revision 5 at www.t10.org]
754 * spin_lock_irqsave(host_set lock)
757 * Zero on success, non-zero on error.
760 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc,
763 struct ata_taskfile *tf = &qc->tf;
765 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
766 tf->protocol = ATA_PROT_NODATA;
767 if (scsicmd[1] & 0x1) {
768 ; /* ignore IMMED bit, violates sat-r05 */
770 if (scsicmd[4] & 0x2)
771 goto invalid_fld; /* LOEJ bit set not supported */
772 if (((scsicmd[4] >> 4) & 0xf) != 0)
773 goto invalid_fld; /* power conditions not supported */
774 if (scsicmd[4] & 0x1) {
775 tf->nsect = 1; /* 1 sector, lba=0 */
777 if (qc->dev->flags & ATA_DFLAG_LBA) {
778 qc->tf.flags |= ATA_TFLAG_LBA;
783 tf->device |= ATA_LBA;
786 tf->lbal = 0x1; /* sect */
787 tf->lbam = 0x0; /* cyl low */
788 tf->lbah = 0x0; /* cyl high */
791 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
793 tf->nsect = 0; /* time period value (0 implies now) */
794 tf->command = ATA_CMD_STANDBY;
795 /* Consider: ATA STANDBY IMMEDIATE command */
798 * Standby and Idle condition timers could be implemented but that
799 * would require libata to implement the Power condition mode page
800 * and allow the user to change it. Changing mode pages requires
801 * MODE SELECT to be implemented.
807 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
808 /* "Invalid field in cbd" */
814 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
815 * @qc: Storage for translated ATA taskfile
816 * @scsicmd: SCSI command to translate (ignored)
818 * Sets up an ATA taskfile to issue FLUSH CACHE or
822 * spin_lock_irqsave(host_set lock)
825 * Zero on success, non-zero on error.
828 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
830 struct ata_taskfile *tf = &qc->tf;
832 tf->flags |= ATA_TFLAG_DEVICE;
833 tf->protocol = ATA_PROT_NODATA;
835 if ((qc->dev->flags & ATA_DFLAG_LBA48) &&
836 (ata_id_has_flush_ext(qc->dev->id)))
837 tf->command = ATA_CMD_FLUSH_EXT;
839 tf->command = ATA_CMD_FLUSH;
845 * scsi_6_lba_len - Get LBA and transfer length
846 * @scsicmd: SCSI command to translate
848 * Calculate LBA and transfer length for 6-byte commands.
852 * @plen: the transfer length
855 static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
860 VPRINTK("six-byte command\n");
862 lba |= ((u64)scsicmd[2]) << 8;
863 lba |= ((u64)scsicmd[3]);
865 len |= ((u32)scsicmd[4]);
872 * scsi_10_lba_len - Get LBA and transfer length
873 * @scsicmd: SCSI command to translate
875 * Calculate LBA and transfer length for 10-byte commands.
879 * @plen: the transfer length
882 static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
887 VPRINTK("ten-byte command\n");
889 lba |= ((u64)scsicmd[2]) << 24;
890 lba |= ((u64)scsicmd[3]) << 16;
891 lba |= ((u64)scsicmd[4]) << 8;
892 lba |= ((u64)scsicmd[5]);
894 len |= ((u32)scsicmd[7]) << 8;
895 len |= ((u32)scsicmd[8]);
902 * scsi_16_lba_len - Get LBA and transfer length
903 * @scsicmd: SCSI command to translate
905 * Calculate LBA and transfer length for 16-byte commands.
909 * @plen: the transfer length
912 static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
917 VPRINTK("sixteen-byte command\n");
919 lba |= ((u64)scsicmd[2]) << 56;
920 lba |= ((u64)scsicmd[3]) << 48;
921 lba |= ((u64)scsicmd[4]) << 40;
922 lba |= ((u64)scsicmd[5]) << 32;
923 lba |= ((u64)scsicmd[6]) << 24;
924 lba |= ((u64)scsicmd[7]) << 16;
925 lba |= ((u64)scsicmd[8]) << 8;
926 lba |= ((u64)scsicmd[9]);
928 len |= ((u32)scsicmd[10]) << 24;
929 len |= ((u32)scsicmd[11]) << 16;
930 len |= ((u32)scsicmd[12]) << 8;
931 len |= ((u32)scsicmd[13]);
938 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
939 * @qc: Storage for translated ATA taskfile
940 * @scsicmd: SCSI command to translate
942 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
945 * spin_lock_irqsave(host_set lock)
948 * Zero on success, non-zero on error.
951 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
953 struct ata_taskfile *tf = &qc->tf;
954 struct ata_device *dev = qc->dev;
955 u64 dev_sectors = qc->dev->n_sectors;
959 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
960 tf->protocol = ATA_PROT_NODATA;
962 if (scsicmd[0] == VERIFY)
963 scsi_10_lba_len(scsicmd, &block, &n_block);
964 else if (scsicmd[0] == VERIFY_16)
965 scsi_16_lba_len(scsicmd, &block, &n_block);
971 if (block >= dev_sectors)
973 if ((block + n_block) > dev_sectors)
976 if (dev->flags & ATA_DFLAG_LBA) {
977 tf->flags |= ATA_TFLAG_LBA;
979 if (dev->flags & ATA_DFLAG_LBA48) {
980 if (n_block > (64 * 1024))
984 tf->flags |= ATA_TFLAG_LBA48;
985 tf->command = ATA_CMD_VERIFY_EXT;
987 tf->hob_nsect = (n_block >> 8) & 0xff;
989 tf->hob_lbah = (block >> 40) & 0xff;
990 tf->hob_lbam = (block >> 32) & 0xff;
991 tf->hob_lbal = (block >> 24) & 0xff;
997 tf->command = ATA_CMD_VERIFY;
999 tf->device |= (block >> 24) & 0xf;
1002 tf->nsect = n_block & 0xff;
1004 tf->lbah = (block >> 16) & 0xff;
1005 tf->lbam = (block >> 8) & 0xff;
1006 tf->lbal = block & 0xff;
1008 tf->device |= ATA_LBA;
1011 u32 sect, head, cyl, track;
1016 /* Convert LBA to CHS */
1017 track = (u32)block / dev->sectors;
1018 cyl = track / dev->heads;
1019 head = track % dev->heads;
1020 sect = (u32)block % dev->sectors + 1;
1022 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1023 (u32)block, track, cyl, head, sect);
1025 /* Check whether the converted CHS can fit.
1029 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1032 tf->command = ATA_CMD_VERIFY;
1033 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1036 tf->lbah = cyl >> 8;
1043 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1044 /* "Invalid field in cbd" */
1048 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1049 /* "Logical Block Address out of range" */
1053 qc->scsicmd->result = SAM_STAT_GOOD;
1058 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1059 * @qc: Storage for translated ATA taskfile
1060 * @scsicmd: SCSI command to translate
1062 * Converts any of six SCSI read/write commands into the
1063 * ATA counterpart, including starting sector (LBA),
1064 * sector count, and taking into account the device's LBA48
1067 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1068 * %WRITE_16 are currently supported.
1071 * spin_lock_irqsave(host_set lock)
1074 * Zero on success, non-zero on error.
1077 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1079 struct ata_taskfile *tf = &qc->tf;
1080 struct ata_device *dev = qc->dev;
1084 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1086 if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 ||
1087 scsicmd[0] == WRITE_16)
1088 tf->flags |= ATA_TFLAG_WRITE;
1090 /* Calculate the SCSI LBA and transfer length. */
1091 switch (scsicmd[0]) {
1094 scsi_10_lba_len(scsicmd, &block, &n_block);
1098 scsi_6_lba_len(scsicmd, &block, &n_block);
1100 /* for 6-byte r/w commands, transfer length 0
1101 * means 256 blocks of data, not 0 block.
1108 scsi_16_lba_len(scsicmd, &block, &n_block);
1111 DPRINTK("no-byte command\n");
1115 /* Check and compose ATA command */
1117 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1118 * length 0 means transfer 0 block of data.
1119 * However, for ATA R/W commands, sector count 0 means
1120 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1124 if (dev->flags & ATA_DFLAG_LBA) {
1125 tf->flags |= ATA_TFLAG_LBA;
1127 if (dev->flags & ATA_DFLAG_LBA48) {
1128 /* The request -may- be too large for LBA48. */
1129 if ((block >> 48) || (n_block > 65536))
1133 tf->flags |= ATA_TFLAG_LBA48;
1135 tf->hob_nsect = (n_block >> 8) & 0xff;
1137 tf->hob_lbah = (block >> 40) & 0xff;
1138 tf->hob_lbam = (block >> 32) & 0xff;
1139 tf->hob_lbal = (block >> 24) & 0xff;
1143 /* The request -may- be too large for LBA28. */
1144 if ((block >> 28) || (n_block > 256))
1147 tf->device |= (block >> 24) & 0xf;
1150 ata_rwcmd_protocol(qc);
1152 qc->nsect = n_block;
1153 tf->nsect = n_block & 0xff;
1155 tf->lbah = (block >> 16) & 0xff;
1156 tf->lbam = (block >> 8) & 0xff;
1157 tf->lbal = block & 0xff;
1159 tf->device |= ATA_LBA;
1162 u32 sect, head, cyl, track;
1164 /* The request -may- be too large for CHS addressing. */
1165 if ((block >> 28) || (n_block > 256))
1168 ata_rwcmd_protocol(qc);
1170 /* Convert LBA to CHS */
1171 track = (u32)block / dev->sectors;
1172 cyl = track / dev->heads;
1173 head = track % dev->heads;
1174 sect = (u32)block % dev->sectors + 1;
1176 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1177 (u32)block, track, cyl, head, sect);
1179 /* Check whether the converted CHS can fit.
1183 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1186 qc->nsect = n_block;
1187 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1190 tf->lbah = cyl >> 8;
1197 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1198 /* "Invalid field in cbd" */
1202 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1203 /* "Logical Block Address out of range" */
1207 qc->scsicmd->result = SAM_STAT_GOOD;
1211 static int ata_scsi_qc_complete(struct ata_queued_cmd *qc,
1212 unsigned int err_mask)
1214 struct scsi_cmnd *cmd = qc->scsicmd;
1215 u8 *cdb = cmd->cmnd;
1216 int need_sense = (err_mask != 0);
1218 /* For ATA pass thru (SAT) commands, generate a sense block if
1219 * user mandated it or if there's an error. Note that if we
1220 * generate because the user forced us to, a check condition
1221 * is generated and the ATA register values are returned
1222 * whether the command completed successfully or not. If there
1223 * was no error, SK, ASC and ASCQ will all be zero.
1225 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1226 ((cdb[2] & 0x20) || need_sense)) {
1227 ata_gen_ata_desc_sense(qc);
1230 cmd->result = SAM_STAT_GOOD;
1232 /* TODO: decide which descriptor format to use
1233 * for 48b LBA devices and call that here
1234 * instead of the fixed desc, which is only
1235 * good for smaller LBA (and maybe CHS?)
1238 ata_gen_fixed_sense(qc);
1243 /* The ata_gen_..._sense routines fill in tf */
1244 ata_dump_status(qc->ap->id, &qc->tf);
1253 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1254 * @ap: ATA port to which the command is addressed
1255 * @dev: ATA device to which the command is addressed
1256 * @cmd: SCSI command to execute
1257 * @done: SCSI command completion function
1258 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1260 * Our ->queuecommand() function has decided that the SCSI
1261 * command issued can be directly translated into an ATA
1262 * command, rather than handled internally.
1264 * This function sets up an ata_queued_cmd structure for the
1265 * SCSI command, and sends that ata_queued_cmd to the hardware.
1267 * The xlat_func argument (actor) returns 0 if ready to execute
1268 * ATA command, else 1 to finish translation. If 1 is returned
1269 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1270 * to be set reflecting an error condition or clean (early)
1274 * spin_lock_irqsave(host_set lock)
1277 static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev,
1278 struct scsi_cmnd *cmd,
1279 void (*done)(struct scsi_cmnd *),
1280 ata_xlat_func_t xlat_func)
1282 struct ata_queued_cmd *qc;
1283 u8 *scsicmd = cmd->cmnd;
1287 qc = ata_scsi_qc_new(ap, dev, cmd, done);
1291 /* data is present; dma-map it */
1292 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1293 cmd->sc_data_direction == DMA_TO_DEVICE) {
1294 if (unlikely(cmd->request_bufflen < 1)) {
1295 printk(KERN_WARNING "ata%u(%u): WARNING: zero len r/w req\n",
1296 ap->id, dev->devno);
1301 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
1303 ata_sg_init_one(qc, cmd->request_buffer,
1304 cmd->request_bufflen);
1306 qc->dma_dir = cmd->sc_data_direction;
1309 qc->complete_fn = ata_scsi_qc_complete;
1311 if (xlat_func(qc, scsicmd))
1314 /* select device, send command to hardware */
1315 if (ata_qc_issue(qc))
1324 DPRINTK("EXIT - early finish (good or error)\n");
1330 cmd->result = (DID_ERROR << 16);
1332 DPRINTK("EXIT - internal\n");
1337 * ata_scsi_rbuf_get - Map response buffer.
1338 * @cmd: SCSI command containing buffer to be mapped.
1339 * @buf_out: Pointer to mapped area.
1341 * Maps buffer contained within SCSI command @cmd.
1344 * spin_lock_irqsave(host_set lock)
1347 * Length of response buffer.
1350 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1353 unsigned int buflen;
1356 struct scatterlist *sg;
1358 sg = (struct scatterlist *) cmd->request_buffer;
1359 buf = kmap_atomic(sg->page, KM_USER0) + sg->offset;
1360 buflen = sg->length;
1362 buf = cmd->request_buffer;
1363 buflen = cmd->request_bufflen;
1371 * ata_scsi_rbuf_put - Unmap response buffer.
1372 * @cmd: SCSI command containing buffer to be unmapped.
1373 * @buf: buffer to unmap
1375 * Unmaps response buffer contained within @cmd.
1378 * spin_lock_irqsave(host_set lock)
1381 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1384 struct scatterlist *sg;
1386 sg = (struct scatterlist *) cmd->request_buffer;
1387 kunmap_atomic(buf - sg->offset, KM_USER0);
1392 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1393 * @args: device IDENTIFY data / SCSI command of interest.
1394 * @actor: Callback hook for desired SCSI command simulator
1396 * Takes care of the hard work of simulating a SCSI command...
1397 * Mapping the response buffer, calling the command's handler,
1398 * and handling the handler's return value. This return value
1399 * indicates whether the handler wishes the SCSI command to be
1400 * completed successfully (0), or not (in which case cmd->result
1401 * and sense buffer are assumed to be set).
1404 * spin_lock_irqsave(host_set lock)
1407 void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1408 unsigned int (*actor) (struct ata_scsi_args *args,
1409 u8 *rbuf, unsigned int buflen))
1412 unsigned int buflen, rc;
1413 struct scsi_cmnd *cmd = args->cmd;
1415 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1416 memset(rbuf, 0, buflen);
1417 rc = actor(args, rbuf, buflen);
1418 ata_scsi_rbuf_put(cmd, rbuf);
1421 cmd->result = SAM_STAT_GOOD;
1426 * ata_scsiop_inq_std - Simulate INQUIRY command
1427 * @args: device IDENTIFY data / SCSI command of interest.
1428 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1429 * @buflen: Response buffer length.
1431 * Returns standard device identification data associated
1432 * with non-EVPD INQUIRY command output.
1435 * spin_lock_irqsave(host_set lock)
1438 unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1439 unsigned int buflen)
1444 0x5, /* claim SPC-3 version compatibility */
1449 /* set scsi removeable (RMB) bit per ata bit */
1450 if (ata_id_removeable(args->id))
1455 memcpy(rbuf, hdr, sizeof(hdr));
1458 memcpy(&rbuf[8], "ATA ", 8);
1459 ata_dev_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16);
1460 ata_dev_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4);
1461 if (rbuf[32] == 0 || rbuf[32] == ' ')
1462 memcpy(&rbuf[32], "n/a ", 4);
1466 const u8 versions[] = {
1467 0x60, /* SAM-3 (no version claimed) */
1470 0x20, /* SBC-2 (no version claimed) */
1473 0x60 /* SPC-3 (no version claimed) */
1476 memcpy(rbuf + 59, versions, sizeof(versions));
1483 * ata_scsiop_inq_00 - Simulate INQUIRY EVPD page 0, list of pages
1484 * @args: device IDENTIFY data / SCSI command of interest.
1485 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1486 * @buflen: Response buffer length.
1488 * Returns list of inquiry EVPD pages available.
1491 * spin_lock_irqsave(host_set lock)
1494 unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1495 unsigned int buflen)
1497 const u8 pages[] = {
1498 0x00, /* page 0x00, this page */
1499 0x80, /* page 0x80, unit serial no page */
1500 0x83 /* page 0x83, device ident page */
1502 rbuf[3] = sizeof(pages); /* number of supported EVPD pages */
1505 memcpy(rbuf + 4, pages, sizeof(pages));
1511 * ata_scsiop_inq_80 - Simulate INQUIRY EVPD page 80, device serial number
1512 * @args: device IDENTIFY data / SCSI command of interest.
1513 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1514 * @buflen: Response buffer length.
1516 * Returns ATA device serial number.
1519 * spin_lock_irqsave(host_set lock)
1522 unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1523 unsigned int buflen)
1527 0x80, /* this page code */
1529 ATA_SERNO_LEN, /* page len */
1531 memcpy(rbuf, hdr, sizeof(hdr));
1533 if (buflen > (ATA_SERNO_LEN + 4 - 1))
1534 ata_dev_id_string(args->id, (unsigned char *) &rbuf[4],
1535 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1540 static const char *inq_83_str = "Linux ATA-SCSI simulator";
1543 * ata_scsiop_inq_83 - Simulate INQUIRY EVPD page 83, device identity
1544 * @args: device IDENTIFY data / SCSI command of interest.
1545 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1546 * @buflen: Response buffer length.
1548 * Returns device identification. Currently hardcoded to
1549 * return "Linux ATA-SCSI simulator".
1552 * spin_lock_irqsave(host_set lock)
1555 unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1556 unsigned int buflen)
1558 rbuf[1] = 0x83; /* this page code */
1559 rbuf[3] = 4 + strlen(inq_83_str); /* page len */
1561 /* our one and only identification descriptor (vendor-specific) */
1562 if (buflen > (strlen(inq_83_str) + 4 + 4 - 1)) {
1563 rbuf[4 + 0] = 2; /* code set: ASCII */
1564 rbuf[4 + 3] = strlen(inq_83_str);
1565 memcpy(rbuf + 4 + 4, inq_83_str, strlen(inq_83_str));
1572 * ata_scsiop_noop - Command handler that simply returns success.
1573 * @args: device IDENTIFY data / SCSI command of interest.
1574 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1575 * @buflen: Response buffer length.
1577 * No operation. Simply returns success to caller, to indicate
1578 * that the caller should successfully complete this SCSI command.
1581 * spin_lock_irqsave(host_set lock)
1584 unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1585 unsigned int buflen)
1592 * ata_msense_push - Push data onto MODE SENSE data output buffer
1593 * @ptr_io: (input/output) Location to store more output data
1594 * @last: End of output data buffer
1595 * @buf: Pointer to BLOB being added to output buffer
1596 * @buflen: Length of BLOB
1598 * Store MODE SENSE data on an output buffer.
1604 static void ata_msense_push(u8 **ptr_io, const u8 *last,
1605 const u8 *buf, unsigned int buflen)
1609 if ((ptr + buflen - 1) > last)
1612 memcpy(ptr, buf, buflen);
1620 * ata_msense_caching - Simulate MODE SENSE caching info page
1621 * @id: device IDENTIFY data
1622 * @ptr_io: (input/output) Location to store more output data
1623 * @last: End of output data buffer
1625 * Generate a caching info page, which conditionally indicates
1626 * write caching to the SCSI layer, depending on device
1633 static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1636 u8 page[CACHE_MPAGE_LEN];
1638 memcpy(page, def_cache_mpage, sizeof(page));
1639 if (ata_id_wcache_enabled(id))
1640 page[2] |= (1 << 2); /* write cache enable */
1641 if (!ata_id_rahead_enabled(id))
1642 page[12] |= (1 << 5); /* disable read ahead */
1644 ata_msense_push(ptr_io, last, page, sizeof(page));
1645 return sizeof(page);
1649 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1650 * @dev: Device associated with this MODE SENSE command
1651 * @ptr_io: (input/output) Location to store more output data
1652 * @last: End of output data buffer
1654 * Generate a generic MODE SENSE control mode page.
1660 static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1662 ata_msense_push(ptr_io, last, def_control_mpage,
1663 sizeof(def_control_mpage));
1664 return sizeof(def_control_mpage);
1668 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1669 * @dev: Device associated with this MODE SENSE command
1670 * @ptr_io: (input/output) Location to store more output data
1671 * @last: End of output data buffer
1673 * Generate a generic MODE SENSE r/w error recovery page.
1679 static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1682 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1683 sizeof(def_rw_recovery_mpage));
1684 return sizeof(def_rw_recovery_mpage);
1688 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1689 * @args: device IDENTIFY data / SCSI command of interest.
1690 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1691 * @buflen: Response buffer length.
1693 * Simulate MODE SENSE commands. Assume this is invoked for direct
1694 * access devices (e.g. disks) only. There should be no block
1695 * descriptor for other device types.
1698 * spin_lock_irqsave(host_set lock)
1701 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
1702 unsigned int buflen)
1704 u8 *scsicmd = args->cmd->cmnd, *p, *last;
1705 const u8 sat_blk_desc[] = {
1706 0, 0, 0, 0, /* number of blocks: sat unspecified */
1708 0, 0x2, 0x0 /* block length: 512 bytes */
1711 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
1715 six_byte = (scsicmd[0] == MODE_SENSE);
1716 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
1718 * LLBA bit in msense(10) ignored (compliant)
1721 page_control = scsicmd[2] >> 6;
1722 switch (page_control) {
1723 case 0: /* current */
1724 break; /* supported */
1726 goto saving_not_supp;
1727 case 1: /* changeable */
1728 case 2: /* defaults */
1734 output_len = 4 + (ebd ? 8 : 0);
1735 alloc_len = scsicmd[4];
1737 output_len = 8 + (ebd ? 8 : 0);
1738 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
1740 minlen = (alloc_len < buflen) ? alloc_len : buflen;
1742 p = rbuf + output_len;
1743 last = rbuf + minlen - 1;
1745 pg = scsicmd[2] & 0x3f;
1748 * No mode subpages supported (yet) but asking for _all_
1749 * subpages may be valid
1751 if (spg && (spg != ALL_SUB_MPAGES))
1755 case RW_RECOVERY_MPAGE:
1756 output_len += ata_msense_rw_recovery(&p, last);
1760 output_len += ata_msense_caching(args->id, &p, last);
1763 case CONTROL_MPAGE: {
1764 output_len += ata_msense_ctl_mode(&p, last);
1769 output_len += ata_msense_rw_recovery(&p, last);
1770 output_len += ata_msense_caching(args->id, &p, last);
1771 output_len += ata_msense_ctl_mode(&p, last);
1774 default: /* invalid page code */
1782 rbuf[0] = output_len;
1785 rbuf[3] = sizeof(sat_blk_desc);
1787 memcpy(rbuf + 4, sat_blk_desc,
1788 sizeof(sat_blk_desc));
1792 rbuf[0] = output_len >> 8;
1794 rbuf[1] = output_len;
1797 rbuf[7] = sizeof(sat_blk_desc);
1799 memcpy(rbuf + 8, sat_blk_desc,
1800 sizeof(sat_blk_desc));
1806 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
1807 /* "Invalid field in cbd" */
1811 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
1812 /* "Saving parameters not supported" */
1817 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
1818 * @args: device IDENTIFY data / SCSI command of interest.
1819 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1820 * @buflen: Response buffer length.
1822 * Simulate READ CAPACITY commands.
1825 * spin_lock_irqsave(host_set lock)
1828 unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
1829 unsigned int buflen)
1836 if (ata_id_has_lba(args->id)) {
1837 if (ata_id_has_lba48(args->id))
1838 n_sectors = ata_id_u64(args->id, 100);
1840 n_sectors = ata_id_u32(args->id, 60);
1842 /* CHS default translation */
1843 n_sectors = args->id[1] * args->id[3] * args->id[6];
1845 if (ata_id_current_chs_valid(args->id))
1846 /* CHS current translation */
1847 n_sectors = ata_id_u32(args->id, 57);
1850 n_sectors--; /* ATA TotalUserSectors - 1 */
1852 if (args->cmd->cmnd[0] == READ_CAPACITY) {
1853 if( n_sectors >= 0xffffffffULL )
1854 tmp = 0xffffffff ; /* Return max count on overflow */
1858 /* sector count, 32-bit */
1859 rbuf[0] = tmp >> (8 * 3);
1860 rbuf[1] = tmp >> (8 * 2);
1861 rbuf[2] = tmp >> (8 * 1);
1865 tmp = ATA_SECT_SIZE;
1870 /* sector count, 64-bit */
1871 tmp = n_sectors >> (8 * 4);
1872 rbuf[2] = tmp >> (8 * 3);
1873 rbuf[3] = tmp >> (8 * 2);
1874 rbuf[4] = tmp >> (8 * 1);
1877 rbuf[6] = tmp >> (8 * 3);
1878 rbuf[7] = tmp >> (8 * 2);
1879 rbuf[8] = tmp >> (8 * 1);
1883 tmp = ATA_SECT_SIZE;
1884 rbuf[12] = tmp >> 8;
1892 * ata_scsiop_report_luns - Simulate REPORT LUNS command
1893 * @args: device IDENTIFY data / SCSI command of interest.
1894 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1895 * @buflen: Response buffer length.
1897 * Simulate REPORT LUNS command.
1900 * spin_lock_irqsave(host_set lock)
1903 unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
1904 unsigned int buflen)
1907 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
1913 * ata_scsi_set_sense - Set SCSI sense data and status
1914 * @cmd: SCSI request to be handled
1915 * @sk: SCSI-defined sense key
1916 * @asc: SCSI-defined additional sense code
1917 * @ascq: SCSI-defined additional sense code qualifier
1919 * Helper function that builds a valid fixed format, current
1920 * response code and the given sense key (sk), additional sense
1921 * code (asc) and additional sense code qualifier (ascq) with
1922 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
1923 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
1929 void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
1931 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1933 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
1934 cmd->sense_buffer[2] = sk;
1935 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
1936 cmd->sense_buffer[12] = asc;
1937 cmd->sense_buffer[13] = ascq;
1941 * ata_scsi_badcmd - End a SCSI request with an error
1942 * @cmd: SCSI request to be handled
1943 * @done: SCSI command completion function
1944 * @asc: SCSI-defined additional sense code
1945 * @ascq: SCSI-defined additional sense code qualifier
1947 * Helper function that completes a SCSI command with
1948 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
1949 * and the specified additional sense codes.
1952 * spin_lock_irqsave(host_set lock)
1955 void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
1958 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
1963 void atapi_request_sense(struct ata_port *ap, struct ata_device *dev,
1964 struct scsi_cmnd *cmd)
1966 DECLARE_COMPLETION(wait);
1967 struct ata_queued_cmd *qc;
1968 unsigned long flags;
1971 DPRINTK("ATAPI request sense\n");
1973 qc = ata_qc_new_init(ap, dev);
1976 /* FIXME: is this needed? */
1977 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
1979 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
1980 qc->dma_dir = DMA_FROM_DEVICE;
1982 memset(&qc->cdb, 0, ap->cdb_len);
1983 qc->cdb[0] = REQUEST_SENSE;
1984 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
1986 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1987 qc->tf.command = ATA_CMD_PACKET;
1989 qc->tf.protocol = ATA_PROT_ATAPI;
1990 qc->tf.lbam = (8 * 1024) & 0xff;
1991 qc->tf.lbah = (8 * 1024) >> 8;
1992 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
1994 qc->waiting = &wait;
1995 qc->complete_fn = ata_qc_complete_noop;
1997 spin_lock_irqsave(&ap->host_set->lock, flags);
1998 rc = ata_qc_issue(qc);
1999 spin_unlock_irqrestore(&ap->host_set->lock, flags);
2002 ata_port_disable(ap);
2004 wait_for_completion(&wait);
2009 static int atapi_qc_complete(struct ata_queued_cmd *qc, unsigned int err_mask)
2011 struct scsi_cmnd *cmd = qc->scsicmd;
2013 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2015 if (unlikely(err_mask & AC_ERR_DEV)) {
2016 DPRINTK("request check condition\n");
2018 /* FIXME: command completion with check condition
2019 * but no sense causes the error handler to run,
2020 * which then issues REQUEST SENSE, fills in the sense
2021 * buffer, and completes the command (for the second
2022 * time). We need to issue REQUEST SENSE some other
2023 * way, to avoid completing the command twice.
2025 cmd->result = SAM_STAT_CHECK_CONDITION;
2032 else if (unlikely(err_mask))
2033 /* FIXME: not quite right; we don't want the
2034 * translation of taskfile registers into
2035 * a sense descriptors, since that's only
2036 * correct for ATA, not ATAPI
2038 ata_gen_ata_desc_sense(qc);
2041 u8 *scsicmd = cmd->cmnd;
2043 if (scsicmd[0] == INQUIRY) {
2045 unsigned int buflen;
2047 buflen = ata_scsi_rbuf_get(cmd, &buf);
2049 /* ATAPI devices typically report zero for their SCSI version,
2050 * and sometimes deviate from the spec WRT response data
2051 * format. If SCSI version is reported as zero like normal,
2052 * then we make the following fixups: 1) Fake MMC-5 version,
2053 * to indicate to the Linux scsi midlayer this is a modern
2054 * device. 2) Ensure response data format / ATAPI information
2055 * are always correct.
2057 /* FIXME: do we ever override EVPD pages and the like, with
2065 ata_scsi_rbuf_put(cmd, buf);
2068 cmd->result = SAM_STAT_GOOD;
2075 * atapi_xlat - Initialize PACKET taskfile
2076 * @qc: command structure to be initialized
2077 * @scsicmd: SCSI CDB associated with this PACKET command
2080 * spin_lock_irqsave(host_set lock)
2083 * Zero on success, non-zero on failure.
2086 static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
2088 struct scsi_cmnd *cmd = qc->scsicmd;
2089 struct ata_device *dev = qc->dev;
2090 int using_pio = (dev->flags & ATA_DFLAG_PIO);
2091 int nodata = (cmd->sc_data_direction == DMA_NONE);
2094 /* Check whether ATAPI DMA is safe */
2095 if (ata_check_atapi_dma(qc))
2098 memcpy(&qc->cdb, scsicmd, qc->ap->cdb_len);
2100 qc->complete_fn = atapi_qc_complete;
2102 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2103 if (cmd->sc_data_direction == DMA_TO_DEVICE) {
2104 qc->tf.flags |= ATA_TFLAG_WRITE;
2105 DPRINTK("direction: write\n");
2108 qc->tf.command = ATA_CMD_PACKET;
2110 /* no data, or PIO data xfer */
2111 if (using_pio || nodata) {
2113 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2115 qc->tf.protocol = ATA_PROT_ATAPI;
2116 qc->tf.lbam = (8 * 1024) & 0xff;
2117 qc->tf.lbah = (8 * 1024) >> 8;
2122 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2123 qc->tf.feature |= ATAPI_PKT_DMA;
2125 #ifdef ATAPI_ENABLE_DMADIR
2126 /* some SATA bridges need us to indicate data xfer direction */
2127 if (cmd->sc_data_direction != DMA_TO_DEVICE)
2128 qc->tf.feature |= ATAPI_DMADIR;
2132 qc->nbytes = cmd->bufflen;
2138 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2139 * @ap: ATA port to which the device is attached
2140 * @scsidev: SCSI device from which we derive the ATA device
2142 * Given various information provided in struct scsi_cmnd,
2143 * map that onto an ATA bus, and using that mapping
2144 * determine which ata_device is associated with the
2145 * SCSI command to be sent.
2148 * spin_lock_irqsave(host_set lock)
2151 * Associated ATA device, or %NULL if not found.
2154 static struct ata_device *
2155 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2157 struct ata_device *dev;
2159 /* skip commands not addressed to targets we simulate */
2160 if (likely(scsidev->id < ATA_MAX_DEVICES))
2161 dev = &ap->device[scsidev->id];
2165 if (unlikely((scsidev->channel != 0) ||
2166 (scsidev->lun != 0)))
2169 if (unlikely(!ata_dev_present(dev)))
2172 if (!atapi_enabled) {
2173 if (unlikely(dev->class == ATA_DEV_ATAPI))
2181 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2182 * @byte1: Byte 1 from pass-thru CDB.
2185 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2188 ata_scsi_map_proto(u8 byte1)
2190 switch((byte1 & 0x1e) >> 1) {
2191 case 3: /* Non-data */
2192 return ATA_PROT_NODATA;
2195 return ATA_PROT_DMA;
2197 case 4: /* PIO Data-in */
2198 case 5: /* PIO Data-out */
2200 return ATA_PROT_PIO_MULT;
2202 return ATA_PROT_PIO;
2204 case 10: /* Device Reset */
2205 case 0: /* Hard Reset */
2207 case 2: /* Bus Idle */
2208 case 7: /* Packet */
2209 case 8: /* DMA Queued */
2210 case 9: /* Device Diagnostic */
2211 case 11: /* UDMA Data-in */
2212 case 12: /* UDMA Data-Out */
2213 case 13: /* FPDMA */
2214 default: /* Reserved */
2218 return ATA_PROT_UNKNOWN;
2222 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2223 * @qc: command structure to be initialized
2224 * @cmd: SCSI command to convert
2226 * Handles either 12 or 16-byte versions of the CDB.
2229 * Zero on success, non-zero on failure.
2232 ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd)
2234 struct ata_taskfile *tf = &(qc->tf);
2235 struct scsi_cmnd *cmd = qc->scsicmd;
2237 if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN)
2241 * 12 and 16 byte CDBs use different offsets to
2242 * provide the various register values.
2244 if (scsicmd[0] == ATA_16) {
2246 * 16-byte CDB - may contain extended commands.
2248 * If that is the case, copy the upper byte register values.
2250 if (scsicmd[1] & 0x01) {
2251 tf->hob_feature = scsicmd[3];
2252 tf->hob_nsect = scsicmd[5];
2253 tf->hob_lbal = scsicmd[7];
2254 tf->hob_lbam = scsicmd[9];
2255 tf->hob_lbah = scsicmd[11];
2256 tf->flags |= ATA_TFLAG_LBA48;
2258 tf->flags &= ~ATA_TFLAG_LBA48;
2261 * Always copy low byte, device and command registers.
2263 tf->feature = scsicmd[4];
2264 tf->nsect = scsicmd[6];
2265 tf->lbal = scsicmd[8];
2266 tf->lbam = scsicmd[10];
2267 tf->lbah = scsicmd[12];
2268 tf->device = scsicmd[13];
2269 tf->command = scsicmd[14];
2272 * 12-byte CDB - incapable of extended commands.
2274 tf->flags &= ~ATA_TFLAG_LBA48;
2276 tf->feature = scsicmd[3];
2277 tf->nsect = scsicmd[4];
2278 tf->lbal = scsicmd[5];
2279 tf->lbam = scsicmd[6];
2280 tf->lbah = scsicmd[7];
2281 tf->device = scsicmd[8];
2282 tf->command = scsicmd[9];
2286 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2287 * SET_FEATURES - XFER MODE must be preceded/succeeded
2288 * by an update to hardware-specific registers for each
2289 * controller (i.e. the reason for ->set_piomode(),
2290 * ->set_dmamode(), and ->post_set_mode() hooks).
2292 if ((tf->command == ATA_CMD_SET_FEATURES)
2293 && (tf->feature == SETFEATURES_XFER))
2297 * Set flags so that all registers will be written,
2298 * and pass on write indication (used for PIO/DMA
2301 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2303 if (cmd->sc_data_direction == DMA_TO_DEVICE)
2304 tf->flags |= ATA_TFLAG_WRITE;
2307 * Set transfer length.
2309 * TODO: find out if we need to do more here to
2310 * cover scatter/gather case.
2312 qc->nsect = cmd->bufflen / ATA_SECT_SIZE;
2318 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2320 * @cmd: SCSI command opcode to consider
2322 * Look up the SCSI command given, and determine whether the
2323 * SCSI command is to be translated or simulated.
2326 * Pointer to translation function if possible, %NULL if not.
2329 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2339 return ata_scsi_rw_xlat;
2341 case SYNCHRONIZE_CACHE:
2342 if (ata_try_flush_cache(dev))
2343 return ata_scsi_flush_xlat;
2348 return ata_scsi_verify_xlat;
2352 return ata_scsi_pass_thru;
2355 return ata_scsi_start_stop_xlat;
2362 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2363 * @ap: ATA port to which the command was being sent
2364 * @cmd: SCSI command to dump
2366 * Prints the contents of a SCSI command via printk().
2369 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2370 struct scsi_cmnd *cmd)
2373 struct scsi_device *scsidev = cmd->device;
2374 u8 *scsicmd = cmd->cmnd;
2376 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2378 scsidev->channel, scsidev->id, scsidev->lun,
2379 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2380 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2386 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2387 * @cmd: SCSI command to be sent
2388 * @done: Completion function, called when command is complete
2390 * In some cases, this function translates SCSI commands into
2391 * ATA taskfiles, and queues the taskfiles to be sent to
2392 * hardware. In other cases, this function simulates a
2393 * SCSI device by evaluating and responding to certain
2394 * SCSI commands. This creates the overall effect of
2395 * ATA and ATAPI devices appearing as SCSI devices.
2398 * Releases scsi-layer-held lock, and obtains host_set lock.
2404 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2406 struct ata_port *ap;
2407 struct ata_device *dev;
2408 struct scsi_device *scsidev = cmd->device;
2409 struct Scsi_Host *shost = scsidev->host;
2411 ap = (struct ata_port *) &shost->hostdata[0];
2413 spin_unlock(shost->host_lock);
2414 spin_lock(&ap->host_set->lock);
2416 ata_scsi_dump_cdb(ap, cmd);
2418 dev = ata_scsi_find_dev(ap, scsidev);
2419 if (unlikely(!dev)) {
2420 cmd->result = (DID_BAD_TARGET << 16);
2425 if (dev->class == ATA_DEV_ATA) {
2426 ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
2430 ata_scsi_translate(ap, dev, cmd, done, xlat_func);
2432 ata_scsi_simulate(dev->id, cmd, done);
2434 ata_scsi_translate(ap, dev, cmd, done, atapi_xlat);
2437 spin_unlock(&ap->host_set->lock);
2438 spin_lock(shost->host_lock);
2443 * ata_scsi_simulate - simulate SCSI command on ATA device
2444 * @id: current IDENTIFY data for target device.
2445 * @cmd: SCSI command being sent to device.
2446 * @done: SCSI command completion function.
2448 * Interprets and directly executes a select list of SCSI commands
2449 * that can be handled internally.
2452 * spin_lock_irqsave(host_set lock)
2455 void ata_scsi_simulate(u16 *id,
2456 struct scsi_cmnd *cmd,
2457 void (*done)(struct scsi_cmnd *))
2459 struct ata_scsi_args args;
2460 const u8 *scsicmd = cmd->cmnd;
2466 switch(scsicmd[0]) {
2467 /* no-op's, complete with success */
2468 case SYNCHRONIZE_CACHE:
2472 case TEST_UNIT_READY:
2473 case FORMAT_UNIT: /* FIXME: correct? */
2474 case SEND_DIAGNOSTIC: /* FIXME: correct? */
2475 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2479 if (scsicmd[1] & 2) /* is CmdDt set? */
2480 ata_scsi_invalid_field(cmd, done);
2481 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2482 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2483 else if (scsicmd[2] == 0x00)
2484 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2485 else if (scsicmd[2] == 0x80)
2486 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2487 else if (scsicmd[2] == 0x83)
2488 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2490 ata_scsi_invalid_field(cmd, done);
2495 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2498 case MODE_SELECT: /* unconditionally return */
2499 case MODE_SELECT_10: /* bad-field-in-cdb */
2500 ata_scsi_invalid_field(cmd, done);
2504 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2507 case SERVICE_ACTION_IN:
2508 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2509 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2511 ata_scsi_invalid_field(cmd, done);
2515 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2518 /* mandatory commands we haven't implemented yet */
2521 /* all other commands */
2523 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2524 /* "Invalid command operation code" */
2530 void ata_scsi_scan_host(struct ata_port *ap)
2532 struct ata_device *dev;
2535 if (ap->flags & ATA_FLAG_PORT_DISABLED)
2538 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2539 dev = &ap->device[i];
2541 if (ata_dev_present(dev))
2542 scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0);