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>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_eh.h>
42 #include <scsi/scsi_device.h>
43 #include <scsi/scsi_request.h>
44 #include <scsi/scsi_transport.h>
45 #include <linux/libata.h>
46 #include <linux/hdreg.h>
47 #include <asm/uaccess.h>
51 #define SECTOR_SIZE 512
53 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd);
54 static struct ata_device *
55 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev);
57 #define RW_RECOVERY_MPAGE 0x1
58 #define RW_RECOVERY_MPAGE_LEN 12
59 #define CACHE_MPAGE 0x8
60 #define CACHE_MPAGE_LEN 20
61 #define CONTROL_MPAGE 0xa
62 #define CONTROL_MPAGE_LEN 12
63 #define ALL_MPAGES 0x3f
64 #define ALL_SUB_MPAGES 0xff
67 static const u8 def_rw_recovery_mpage[] = {
69 RW_RECOVERY_MPAGE_LEN - 2,
70 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
71 (1 << 6), /* ARRE (auto read reallocation) */
72 0, /* read retry count */
74 0, /* write retry count */
78 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
81 0, /* contains WCE, needs to be 0 for logic */
82 0, 0, 0, 0, 0, 0, 0, 0, 0,
83 0, /* contains DRA, needs to be 0 for logic */
87 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
89 CONTROL_MPAGE_LEN - 2,
90 2, /* DSENSE=0, GLTSD=1 */
91 0, /* [QAM+QERR may be 1, see 05-359r1] */
92 0, 0, 0, 0, 0xff, 0xff,
93 0, 30 /* extended self test time, see 05-359r1 */
97 * libata transport template. libata doesn't do real transport stuff.
98 * It just needs the eh_timed_out hook.
100 struct scsi_transport_template ata_scsi_transport_template = {
101 .eh_strategy_handler = ata_scsi_error,
102 .eh_timed_out = ata_scsi_timed_out,
106 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
107 void (*done)(struct scsi_cmnd *))
109 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
110 /* "Invalid field in cbd" */
115 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
116 * @sdev: SCSI device for which BIOS geometry is to be determined
117 * @bdev: block device associated with @sdev
118 * @capacity: capacity of SCSI device
119 * @geom: location to which geometry will be output
121 * Generic bios head/sector/cylinder calculator
122 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
123 * mapping. Some situations may arise where the disk is not
124 * bootable if this is not used.
127 * Defined by the SCSI layer. We don't really care.
132 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
133 sector_t capacity, int geom[])
137 sector_div(capacity, 255*63);
144 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
145 * @scsidev: Device to which we are issuing command
146 * @arg: User provided data for issuing command
149 * Defined by the SCSI layer. We don't really care.
152 * Zero on success, negative errno on error.
155 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
158 u8 scsi_cmd[MAX_COMMAND_SIZE];
159 u8 args[4], *argbuf = NULL;
161 struct scsi_sense_hdr sshdr;
162 enum dma_data_direction data_dir;
167 if (copy_from_user(args, arg, sizeof(args)))
170 memset(scsi_cmd, 0, sizeof(scsi_cmd));
173 argsize = SECTOR_SIZE * args[3];
174 argbuf = kmalloc(argsize, GFP_KERNEL);
175 if (argbuf == NULL) {
180 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
181 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
182 block count in sector count field */
183 data_dir = DMA_FROM_DEVICE;
185 scsi_cmd[1] = (3 << 1); /* Non-data */
186 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
190 scsi_cmd[0] = ATA_16;
192 scsi_cmd[4] = args[2];
193 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
194 scsi_cmd[6] = args[3];
195 scsi_cmd[8] = args[1];
199 scsi_cmd[6] = args[1];
201 scsi_cmd[14] = args[0];
203 /* Good values for timeout and retries? Values below
204 from scsi_ioctl_send_command() for default case... */
205 if (scsi_execute_req(scsidev, scsi_cmd, data_dir, argbuf, argsize,
206 &sshdr, (10*HZ), 5)) {
211 /* Need code to retrieve data from check condition? */
214 && copy_to_user(arg + sizeof(args), argbuf, argsize))
224 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
225 * @scsidev: Device to which we are issuing command
226 * @arg: User provided data for issuing command
229 * Defined by the SCSI layer. We don't really care.
232 * Zero on success, negative errno on error.
234 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
237 u8 scsi_cmd[MAX_COMMAND_SIZE];
239 struct scsi_sense_hdr sshdr;
244 if (copy_from_user(args, arg, sizeof(args)))
247 memset(scsi_cmd, 0, sizeof(scsi_cmd));
248 scsi_cmd[0] = ATA_16;
249 scsi_cmd[1] = (3 << 1); /* Non-data */
250 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
251 scsi_cmd[4] = args[1];
252 scsi_cmd[6] = args[2];
253 scsi_cmd[8] = args[3];
254 scsi_cmd[10] = args[4];
255 scsi_cmd[12] = args[5];
256 scsi_cmd[14] = args[0];
258 /* Good values for timeout and retries? Values below
259 from scsi_ioctl_send_command() for default case... */
260 if (scsi_execute_req(scsidev, scsi_cmd, DMA_NONE, NULL, 0, &sshdr,
264 /* Need code to retrieve data from check condition? */
268 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
270 int val = -EINVAL, rc = -EINVAL;
273 case ATA_IOC_GET_IO32:
275 if (copy_to_user(arg, &val, 1))
279 case ATA_IOC_SET_IO32:
280 val = (unsigned long) arg;
286 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
288 return ata_cmd_ioctl(scsidev, arg);
290 case HDIO_DRIVE_TASK:
291 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
293 return ata_task_ioctl(scsidev, arg);
304 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
305 * @dev: ATA device to which the new command is attached
306 * @cmd: SCSI command that originated this ATA command
307 * @done: SCSI command completion function
309 * Obtain a reference to an unused ata_queued_cmd structure,
310 * which is the basic libata structure representing a single
311 * ATA command sent to the hardware.
313 * If a command was available, fill in the SCSI-specific
314 * portions of the structure with information on the
318 * spin_lock_irqsave(host_set lock)
321 * Command allocated, or %NULL if none available.
323 struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
324 struct scsi_cmnd *cmd,
325 void (*done)(struct scsi_cmnd *))
327 struct ata_queued_cmd *qc;
329 qc = ata_qc_new_init(dev);
335 qc->__sg = (struct scatterlist *) cmd->request_buffer;
336 qc->n_elem = cmd->use_sg;
338 qc->__sg = &qc->sgent;
342 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
350 * ata_dump_status - user friendly display of error info
351 * @id: id of the port in question
352 * @tf: ptr to filled out taskfile
354 * Decode and dump the ATA error/status registers for the user so
355 * that they have some idea what really happened at the non
356 * make-believe layer.
359 * inherited from caller
361 void ata_dump_status(unsigned id, struct ata_taskfile *tf)
363 u8 stat = tf->command, err = tf->feature;
365 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
366 if (stat & ATA_BUSY) {
367 printk("Busy }\n"); /* Data is not valid in this case */
369 if (stat & 0x40) printk("DriveReady ");
370 if (stat & 0x20) printk("DeviceFault ");
371 if (stat & 0x10) printk("SeekComplete ");
372 if (stat & 0x08) printk("DataRequest ");
373 if (stat & 0x04) printk("CorrectedError ");
374 if (stat & 0x02) printk("Index ");
375 if (stat & 0x01) printk("Error ");
379 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
380 if (err & 0x04) printk("DriveStatusError ");
382 if (err & 0x04) printk("BadCRC ");
383 else printk("Sector ");
385 if (err & 0x40) printk("UncorrectableError ");
386 if (err & 0x10) printk("SectorIdNotFound ");
387 if (err & 0x02) printk("TrackZeroNotFound ");
388 if (err & 0x01) printk("AddrMarkNotFound ");
394 int ata_scsi_device_resume(struct scsi_device *sdev)
396 struct ata_port *ap = ata_shost_to_port(sdev->host);
397 struct ata_device *dev = &ap->device[sdev->id];
399 return ata_device_resume(dev);
402 int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t state)
404 struct ata_port *ap = ata_shost_to_port(sdev->host);
405 struct ata_device *dev = &ap->device[sdev->id];
407 return ata_device_suspend(dev, state);
411 * ata_to_sense_error - convert ATA error to SCSI error
412 * @id: ATA device number
413 * @drv_stat: value contained in ATA status register
414 * @drv_err: value contained in ATA error register
415 * @sk: the sense key we'll fill out
416 * @asc: the additional sense code we'll fill out
417 * @ascq: the additional sense code qualifier we'll fill out
418 * @verbose: be verbose
420 * Converts an ATA error into a SCSI error. Fill out pointers to
421 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
422 * format sense blocks.
425 * spin_lock_irqsave(host_set lock)
427 void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
428 u8 *ascq, int verbose)
432 /* Based on the 3ware driver translation table */
433 static const unsigned char sense_table[][4] = {
435 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
437 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
439 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
440 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
441 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
442 /* MC|ID|ABRT|TRK0|MARK */
443 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
445 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
446 /* Bad address mark */
447 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
449 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
451 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
452 /* Media change request */
453 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
455 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
457 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
459 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
460 /* BBD - block marked bad */
461 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
462 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
464 static const unsigned char stat_table[][4] = {
465 /* Must be first because BUSY means no other bits valid */
466 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
467 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
468 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
469 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
470 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
474 * Is this an error we can process/parse
476 if (drv_stat & ATA_BUSY) {
477 drv_err = 0; /* Ignore the err bits, they're invalid */
481 /* Look for drv_err */
482 for (i = 0; sense_table[i][0] != 0xFF; i++) {
483 /* Look for best matches first */
484 if ((sense_table[i][0] & drv_err) ==
486 *sk = sense_table[i][1];
487 *asc = sense_table[i][2];
488 *ascq = sense_table[i][3];
492 /* No immediate match */
494 printk(KERN_WARNING "ata%u: no sense translation for "
495 "error 0x%02x\n", id, drv_err);
498 /* Fall back to interpreting status bits */
499 for (i = 0; stat_table[i][0] != 0xFF; i++) {
500 if (stat_table[i][0] & drv_stat) {
501 *sk = stat_table[i][1];
502 *asc = stat_table[i][2];
503 *ascq = stat_table[i][3];
507 /* No error? Undecoded? */
509 printk(KERN_WARNING "ata%u: no sense translation for "
510 "status: 0x%02x\n", id, drv_stat);
512 /* We need a sensible error return here, which is tricky, and one
513 that won't cause people to do things like return a disk wrongly */
514 *sk = ABORTED_COMMAND;
520 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
521 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
522 id, drv_stat, drv_err, *sk, *asc, *ascq);
527 * ata_gen_ata_desc_sense - Generate check condition sense block.
528 * @qc: Command that completed.
530 * This function is specific to the ATA descriptor format sense
531 * block specified for the ATA pass through commands. Regardless
532 * of whether the command errored or not, return a sense
533 * block. Copy all controller registers into the sense
534 * block. Clear sense key, ASC & ASCQ if there is no error.
537 * spin_lock_irqsave(host_set lock)
539 void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
541 struct scsi_cmnd *cmd = qc->scsicmd;
542 struct ata_taskfile *tf = &qc->result_tf;
543 unsigned char *sb = cmd->sense_buffer;
544 unsigned char *desc = sb + 8;
545 int verbose = qc->ap->ops->error_handler == NULL;
547 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
549 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
552 * Use ata_to_sense_error() to map status register bits
553 * onto sense key, asc & ascq.
556 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
557 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
558 &sb[1], &sb[2], &sb[3], verbose);
563 * Sense data is current and format is descriptor.
570 * Set length of additional sense data.
571 * Since we only populate descriptor 0, the total
572 * length is the same (fixed) length as descriptor 0.
574 desc[1] = sb[7] = 14;
577 * Copy registers into sense buffer.
580 desc[3] = tf->feature; /* == error reg */
585 desc[12] = tf->device;
586 desc[13] = tf->command; /* == status reg */
589 * Fill in Extend bit, and the high order bytes
592 if (tf->flags & ATA_TFLAG_LBA48) {
594 desc[4] = tf->hob_nsect;
595 desc[6] = tf->hob_lbal;
596 desc[8] = tf->hob_lbam;
597 desc[10] = tf->hob_lbah;
602 * ata_gen_fixed_sense - generate a SCSI fixed sense block
603 * @qc: Command that we are erroring out
605 * Leverage ata_to_sense_error() to give us the codes. Fit our
606 * LBA in here if there's room.
609 * inherited from caller
611 void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
613 struct scsi_cmnd *cmd = qc->scsicmd;
614 struct ata_taskfile *tf = &qc->result_tf;
615 unsigned char *sb = cmd->sense_buffer;
616 int verbose = qc->ap->ops->error_handler == NULL;
618 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
620 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
623 * Use ata_to_sense_error() to map status register bits
624 * onto sense key, asc & ascq.
627 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
628 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
629 &sb[2], &sb[12], &sb[13], verbose);
636 if (tf->flags & ATA_TFLAG_LBA48) {
637 /* TODO: find solution for LBA48 descriptors */
640 else if (tf->flags & ATA_TFLAG_LBA) {
641 /* A small (28b) LBA will fit in the 32b info field */
642 sb[0] |= 0x80; /* set valid bit */
643 sb[3] = tf->device & 0x0f;
654 static void ata_scsi_sdev_config(struct scsi_device *sdev)
656 sdev->use_10_for_rw = 1;
657 sdev->use_10_for_ms = 1;
660 static void ata_scsi_dev_config(struct scsi_device *sdev,
661 struct ata_device *dev)
663 unsigned int max_sectors;
665 /* TODO: 2048 is an arbitrary number, not the
666 * hardware maximum. This should be increased to
667 * 65534 when Jens Axboe's patch for dynamically
668 * determining max_sectors is merged.
670 max_sectors = ATA_MAX_SECTORS;
671 if (dev->flags & ATA_DFLAG_LBA48)
673 if (dev->max_sectors)
674 max_sectors = dev->max_sectors;
676 blk_queue_max_sectors(sdev->request_queue, max_sectors);
679 * SATA DMA transfers must be multiples of 4 byte, so
680 * we need to pad ATAPI transfers using an extra sg.
681 * Decrement max hw segments accordingly.
683 if (dev->class == ATA_DEV_ATAPI) {
684 request_queue_t *q = sdev->request_queue;
685 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
690 * ata_scsi_slave_config - Set SCSI device attributes
691 * @sdev: SCSI device to examine
693 * This is called before we actually start reading
694 * and writing to the device, to configure certain
695 * SCSI mid-layer behaviors.
698 * Defined by SCSI layer. We don't really care.
701 int ata_scsi_slave_config(struct scsi_device *sdev)
703 ata_scsi_sdev_config(sdev);
705 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
707 if (sdev->id < ATA_MAX_DEVICES) {
709 struct ata_device *dev;
711 ap = ata_shost_to_port(sdev->host);
712 dev = &ap->device[sdev->id];
714 ata_scsi_dev_config(sdev, dev);
717 return 0; /* scsi layer doesn't check return value, sigh */
721 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
722 * @qc: Storage for translated ATA taskfile
723 * @scsicmd: SCSI command to translate
725 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
726 * (to start). Perhaps these commands should be preceded by
727 * CHECK POWER MODE to see what power mode the device is already in.
728 * [See SAT revision 5 at www.t10.org]
731 * spin_lock_irqsave(host_set lock)
734 * Zero on success, non-zero on error.
737 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc,
740 struct ata_taskfile *tf = &qc->tf;
742 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
743 tf->protocol = ATA_PROT_NODATA;
744 if (scsicmd[1] & 0x1) {
745 ; /* ignore IMMED bit, violates sat-r05 */
747 if (scsicmd[4] & 0x2)
748 goto invalid_fld; /* LOEJ bit set not supported */
749 if (((scsicmd[4] >> 4) & 0xf) != 0)
750 goto invalid_fld; /* power conditions not supported */
751 if (scsicmd[4] & 0x1) {
752 tf->nsect = 1; /* 1 sector, lba=0 */
754 if (qc->dev->flags & ATA_DFLAG_LBA) {
755 tf->flags |= ATA_TFLAG_LBA;
760 tf->device |= ATA_LBA;
763 tf->lbal = 0x1; /* sect */
764 tf->lbam = 0x0; /* cyl low */
765 tf->lbah = 0x0; /* cyl high */
768 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
770 tf->nsect = 0; /* time period value (0 implies now) */
771 tf->command = ATA_CMD_STANDBY;
772 /* Consider: ATA STANDBY IMMEDIATE command */
775 * Standby and Idle condition timers could be implemented but that
776 * would require libata to implement the Power condition mode page
777 * and allow the user to change it. Changing mode pages requires
778 * MODE SELECT to be implemented.
784 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
785 /* "Invalid field in cbd" */
791 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
792 * @qc: Storage for translated ATA taskfile
793 * @scsicmd: SCSI command to translate (ignored)
795 * Sets up an ATA taskfile to issue FLUSH CACHE or
799 * spin_lock_irqsave(host_set lock)
802 * Zero on success, non-zero on error.
805 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
807 struct ata_taskfile *tf = &qc->tf;
809 tf->flags |= ATA_TFLAG_DEVICE;
810 tf->protocol = ATA_PROT_NODATA;
812 if ((qc->dev->flags & ATA_DFLAG_LBA48) &&
813 (ata_id_has_flush_ext(qc->dev->id)))
814 tf->command = ATA_CMD_FLUSH_EXT;
816 tf->command = ATA_CMD_FLUSH;
822 * scsi_6_lba_len - Get LBA and transfer length
823 * @scsicmd: SCSI command to translate
825 * Calculate LBA and transfer length for 6-byte commands.
829 * @plen: the transfer length
832 static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
837 VPRINTK("six-byte command\n");
839 lba |= ((u64)scsicmd[2]) << 8;
840 lba |= ((u64)scsicmd[3]);
842 len |= ((u32)scsicmd[4]);
849 * scsi_10_lba_len - Get LBA and transfer length
850 * @scsicmd: SCSI command to translate
852 * Calculate LBA and transfer length for 10-byte commands.
856 * @plen: the transfer length
859 static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
864 VPRINTK("ten-byte command\n");
866 lba |= ((u64)scsicmd[2]) << 24;
867 lba |= ((u64)scsicmd[3]) << 16;
868 lba |= ((u64)scsicmd[4]) << 8;
869 lba |= ((u64)scsicmd[5]);
871 len |= ((u32)scsicmd[7]) << 8;
872 len |= ((u32)scsicmd[8]);
879 * scsi_16_lba_len - Get LBA and transfer length
880 * @scsicmd: SCSI command to translate
882 * Calculate LBA and transfer length for 16-byte commands.
886 * @plen: the transfer length
889 static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
894 VPRINTK("sixteen-byte command\n");
896 lba |= ((u64)scsicmd[2]) << 56;
897 lba |= ((u64)scsicmd[3]) << 48;
898 lba |= ((u64)scsicmd[4]) << 40;
899 lba |= ((u64)scsicmd[5]) << 32;
900 lba |= ((u64)scsicmd[6]) << 24;
901 lba |= ((u64)scsicmd[7]) << 16;
902 lba |= ((u64)scsicmd[8]) << 8;
903 lba |= ((u64)scsicmd[9]);
905 len |= ((u32)scsicmd[10]) << 24;
906 len |= ((u32)scsicmd[11]) << 16;
907 len |= ((u32)scsicmd[12]) << 8;
908 len |= ((u32)scsicmd[13]);
915 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
916 * @qc: Storage for translated ATA taskfile
917 * @scsicmd: SCSI command to translate
919 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
922 * spin_lock_irqsave(host_set lock)
925 * Zero on success, non-zero on error.
928 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
930 struct ata_taskfile *tf = &qc->tf;
931 struct ata_device *dev = qc->dev;
932 u64 dev_sectors = qc->dev->n_sectors;
936 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
937 tf->protocol = ATA_PROT_NODATA;
939 if (scsicmd[0] == VERIFY)
940 scsi_10_lba_len(scsicmd, &block, &n_block);
941 else if (scsicmd[0] == VERIFY_16)
942 scsi_16_lba_len(scsicmd, &block, &n_block);
948 if (block >= dev_sectors)
950 if ((block + n_block) > dev_sectors)
953 if (dev->flags & ATA_DFLAG_LBA) {
954 tf->flags |= ATA_TFLAG_LBA;
956 if (lba_28_ok(block, n_block)) {
958 tf->command = ATA_CMD_VERIFY;
959 tf->device |= (block >> 24) & 0xf;
960 } else if (lba_48_ok(block, n_block)) {
961 if (!(dev->flags & ATA_DFLAG_LBA48))
965 tf->flags |= ATA_TFLAG_LBA48;
966 tf->command = ATA_CMD_VERIFY_EXT;
968 tf->hob_nsect = (n_block >> 8) & 0xff;
970 tf->hob_lbah = (block >> 40) & 0xff;
971 tf->hob_lbam = (block >> 32) & 0xff;
972 tf->hob_lbal = (block >> 24) & 0xff;
974 /* request too large even for LBA48 */
977 tf->nsect = n_block & 0xff;
979 tf->lbah = (block >> 16) & 0xff;
980 tf->lbam = (block >> 8) & 0xff;
981 tf->lbal = block & 0xff;
983 tf->device |= ATA_LBA;
986 u32 sect, head, cyl, track;
988 if (!lba_28_ok(block, n_block))
991 /* Convert LBA to CHS */
992 track = (u32)block / dev->sectors;
993 cyl = track / dev->heads;
994 head = track % dev->heads;
995 sect = (u32)block % dev->sectors + 1;
997 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
998 (u32)block, track, cyl, head, sect);
1000 /* Check whether the converted CHS can fit.
1004 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1007 tf->command = ATA_CMD_VERIFY;
1008 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1011 tf->lbah = cyl >> 8;
1018 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1019 /* "Invalid field in cbd" */
1023 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1024 /* "Logical Block Address out of range" */
1028 qc->scsicmd->result = SAM_STAT_GOOD;
1033 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1034 * @qc: Storage for translated ATA taskfile
1035 * @scsicmd: SCSI command to translate
1037 * Converts any of six SCSI read/write commands into the
1038 * ATA counterpart, including starting sector (LBA),
1039 * sector count, and taking into account the device's LBA48
1042 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1043 * %WRITE_16 are currently supported.
1046 * spin_lock_irqsave(host_set lock)
1049 * Zero on success, non-zero on error.
1052 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1054 struct ata_taskfile *tf = &qc->tf;
1055 struct ata_device *dev = qc->dev;
1059 qc->flags |= ATA_QCFLAG_IO;
1060 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1062 if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 ||
1063 scsicmd[0] == WRITE_16)
1064 tf->flags |= ATA_TFLAG_WRITE;
1066 /* Calculate the SCSI LBA, transfer length and FUA. */
1067 switch (scsicmd[0]) {
1070 scsi_10_lba_len(scsicmd, &block, &n_block);
1071 if (unlikely(scsicmd[1] & (1 << 3)))
1072 tf->flags |= ATA_TFLAG_FUA;
1076 scsi_6_lba_len(scsicmd, &block, &n_block);
1078 /* for 6-byte r/w commands, transfer length 0
1079 * means 256 blocks of data, not 0 block.
1086 scsi_16_lba_len(scsicmd, &block, &n_block);
1087 if (unlikely(scsicmd[1] & (1 << 3)))
1088 tf->flags |= ATA_TFLAG_FUA;
1091 DPRINTK("no-byte command\n");
1095 /* Check and compose ATA command */
1097 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1098 * length 0 means transfer 0 block of data.
1099 * However, for ATA R/W commands, sector count 0 means
1100 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1102 * WARNING: one or two older ATA drives treat 0 as 0...
1106 if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ) {
1108 if (!lba_48_ok(block, n_block))
1111 tf->protocol = ATA_PROT_NCQ;
1112 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
1114 if (tf->flags & ATA_TFLAG_WRITE)
1115 tf->command = ATA_CMD_FPDMA_WRITE;
1117 tf->command = ATA_CMD_FPDMA_READ;
1119 qc->nsect = n_block;
1121 tf->nsect = qc->tag << 3;
1122 tf->hob_feature = (n_block >> 8) & 0xff;
1123 tf->feature = n_block & 0xff;
1125 tf->hob_lbah = (block >> 40) & 0xff;
1126 tf->hob_lbam = (block >> 32) & 0xff;
1127 tf->hob_lbal = (block >> 24) & 0xff;
1128 tf->lbah = (block >> 16) & 0xff;
1129 tf->lbam = (block >> 8) & 0xff;
1130 tf->lbal = block & 0xff;
1132 tf->device = 1 << 6;
1133 if (tf->flags & ATA_TFLAG_FUA)
1134 tf->device |= 1 << 7;
1135 } else if (dev->flags & ATA_DFLAG_LBA) {
1136 tf->flags |= ATA_TFLAG_LBA;
1138 if (lba_28_ok(block, n_block)) {
1140 tf->device |= (block >> 24) & 0xf;
1141 } else if (lba_48_ok(block, n_block)) {
1142 if (!(dev->flags & ATA_DFLAG_LBA48))
1146 tf->flags |= ATA_TFLAG_LBA48;
1148 tf->hob_nsect = (n_block >> 8) & 0xff;
1150 tf->hob_lbah = (block >> 40) & 0xff;
1151 tf->hob_lbam = (block >> 32) & 0xff;
1152 tf->hob_lbal = (block >> 24) & 0xff;
1154 /* request too large even for LBA48 */
1157 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1160 qc->nsect = n_block;
1161 tf->nsect = n_block & 0xff;
1163 tf->lbah = (block >> 16) & 0xff;
1164 tf->lbam = (block >> 8) & 0xff;
1165 tf->lbal = block & 0xff;
1167 tf->device |= ATA_LBA;
1170 u32 sect, head, cyl, track;
1172 /* The request -may- be too large for CHS addressing. */
1173 if (!lba_28_ok(block, n_block))
1176 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1179 /* Convert LBA to CHS */
1180 track = (u32)block / dev->sectors;
1181 cyl = track / dev->heads;
1182 head = track % dev->heads;
1183 sect = (u32)block % dev->sectors + 1;
1185 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1186 (u32)block, track, cyl, head, sect);
1188 /* Check whether the converted CHS can fit.
1192 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1195 qc->nsect = n_block;
1196 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1199 tf->lbah = cyl >> 8;
1206 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1207 /* "Invalid field in cbd" */
1211 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1212 /* "Logical Block Address out of range" */
1216 qc->scsicmd->result = SAM_STAT_GOOD;
1220 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1222 struct scsi_cmnd *cmd = qc->scsicmd;
1223 u8 *cdb = cmd->cmnd;
1224 int need_sense = (qc->err_mask != 0);
1226 /* For ATA pass thru (SAT) commands, generate a sense block if
1227 * user mandated it or if there's an error. Note that if we
1228 * generate because the user forced us to, a check condition
1229 * is generated and the ATA register values are returned
1230 * whether the command completed successfully or not. If there
1231 * was no error, SK, ASC and ASCQ will all be zero.
1233 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1234 ((cdb[2] & 0x20) || need_sense)) {
1235 ata_gen_ata_desc_sense(qc);
1238 cmd->result = SAM_STAT_GOOD;
1240 /* TODO: decide which descriptor format to use
1241 * for 48b LBA devices and call that here
1242 * instead of the fixed desc, which is only
1243 * good for smaller LBA (and maybe CHS?)
1246 ata_gen_fixed_sense(qc);
1250 if (need_sense && !qc->ap->ops->error_handler)
1251 ata_dump_status(qc->ap->id, &qc->result_tf);
1259 * ata_scmd_need_defer - Check whether we need to defer scmd
1260 * @dev: ATA device to which the command is addressed
1261 * @is_io: Is the command IO (and thus possibly NCQ)?
1263 * NCQ and non-NCQ commands cannot run together. As upper layer
1264 * only knows the queue depth, we are responsible for maintaining
1265 * exclusion. This function checks whether a new command can be
1269 * spin_lock_irqsave(host_set lock)
1272 * 1 if deferring is needed, 0 otherwise.
1274 static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
1276 struct ata_port *ap = dev->ap;
1278 if (!(dev->flags & ATA_DFLAG_NCQ))
1282 if (!ata_tag_valid(ap->active_tag))
1285 if (!ata_tag_valid(ap->active_tag) && !ap->sactive)
1292 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1293 * @dev: ATA device to which the command is addressed
1294 * @cmd: SCSI command to execute
1295 * @done: SCSI command completion function
1296 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1298 * Our ->queuecommand() function has decided that the SCSI
1299 * command issued can be directly translated into an ATA
1300 * command, rather than handled internally.
1302 * This function sets up an ata_queued_cmd structure for the
1303 * SCSI command, and sends that ata_queued_cmd to the hardware.
1305 * The xlat_func argument (actor) returns 0 if ready to execute
1306 * ATA command, else 1 to finish translation. If 1 is returned
1307 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1308 * to be set reflecting an error condition or clean (early)
1312 * spin_lock_irqsave(host_set lock)
1315 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1316 * needs to be deferred.
1318 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1319 void (*done)(struct scsi_cmnd *),
1320 ata_xlat_func_t xlat_func)
1322 struct ata_queued_cmd *qc;
1323 u8 *scsicmd = cmd->cmnd;
1324 int is_io = xlat_func == ata_scsi_rw_xlat;
1328 if (unlikely(ata_scmd_need_defer(dev, is_io)))
1331 qc = ata_scsi_qc_new(dev, cmd, done);
1335 /* data is present; dma-map it */
1336 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1337 cmd->sc_data_direction == DMA_TO_DEVICE) {
1338 if (unlikely(cmd->request_bufflen < 1)) {
1339 ata_dev_printk(dev, KERN_WARNING,
1340 "WARNING: zero len r/w req\n");
1345 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
1347 ata_sg_init_one(qc, cmd->request_buffer,
1348 cmd->request_bufflen);
1350 qc->dma_dir = cmd->sc_data_direction;
1353 qc->complete_fn = ata_scsi_qc_complete;
1355 if (xlat_func(qc, scsicmd))
1358 /* select device, send command to hardware */
1367 DPRINTK("EXIT - early finish (good or error)\n");
1373 cmd->result = (DID_ERROR << 16);
1375 DPRINTK("EXIT - internal\n");
1379 DPRINTK("EXIT - defer\n");
1380 return SCSI_MLQUEUE_DEVICE_BUSY;
1384 * ata_scsi_rbuf_get - Map response buffer.
1385 * @cmd: SCSI command containing buffer to be mapped.
1386 * @buf_out: Pointer to mapped area.
1388 * Maps buffer contained within SCSI command @cmd.
1391 * spin_lock_irqsave(host_set lock)
1394 * Length of response buffer.
1397 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1400 unsigned int buflen;
1403 struct scatterlist *sg;
1405 sg = (struct scatterlist *) cmd->request_buffer;
1406 buf = kmap_atomic(sg->page, KM_USER0) + sg->offset;
1407 buflen = sg->length;
1409 buf = cmd->request_buffer;
1410 buflen = cmd->request_bufflen;
1418 * ata_scsi_rbuf_put - Unmap response buffer.
1419 * @cmd: SCSI command containing buffer to be unmapped.
1420 * @buf: buffer to unmap
1422 * Unmaps response buffer contained within @cmd.
1425 * spin_lock_irqsave(host_set lock)
1428 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1431 struct scatterlist *sg;
1433 sg = (struct scatterlist *) cmd->request_buffer;
1434 kunmap_atomic(buf - sg->offset, KM_USER0);
1439 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1440 * @args: device IDENTIFY data / SCSI command of interest.
1441 * @actor: Callback hook for desired SCSI command simulator
1443 * Takes care of the hard work of simulating a SCSI command...
1444 * Mapping the response buffer, calling the command's handler,
1445 * and handling the handler's return value. This return value
1446 * indicates whether the handler wishes the SCSI command to be
1447 * completed successfully (0), or not (in which case cmd->result
1448 * and sense buffer are assumed to be set).
1451 * spin_lock_irqsave(host_set lock)
1454 void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1455 unsigned int (*actor) (struct ata_scsi_args *args,
1456 u8 *rbuf, unsigned int buflen))
1459 unsigned int buflen, rc;
1460 struct scsi_cmnd *cmd = args->cmd;
1462 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1463 memset(rbuf, 0, buflen);
1464 rc = actor(args, rbuf, buflen);
1465 ata_scsi_rbuf_put(cmd, rbuf);
1468 cmd->result = SAM_STAT_GOOD;
1473 * ata_scsiop_inq_std - Simulate INQUIRY command
1474 * @args: device IDENTIFY data / SCSI command of interest.
1475 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1476 * @buflen: Response buffer length.
1478 * Returns standard device identification data associated
1479 * with non-VPD INQUIRY command output.
1482 * spin_lock_irqsave(host_set lock)
1485 unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1486 unsigned int buflen)
1491 0x5, /* claim SPC-3 version compatibility */
1496 /* set scsi removeable (RMB) bit per ata bit */
1497 if (ata_id_removeable(args->id))
1502 memcpy(rbuf, hdr, sizeof(hdr));
1505 memcpy(&rbuf[8], "ATA ", 8);
1506 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16);
1507 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4);
1508 if (rbuf[32] == 0 || rbuf[32] == ' ')
1509 memcpy(&rbuf[32], "n/a ", 4);
1513 const u8 versions[] = {
1514 0x60, /* SAM-3 (no version claimed) */
1517 0x20, /* SBC-2 (no version claimed) */
1520 0x60 /* SPC-3 (no version claimed) */
1523 memcpy(rbuf + 59, versions, sizeof(versions));
1530 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1531 * @args: device IDENTIFY data / SCSI command of interest.
1532 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1533 * @buflen: Response buffer length.
1535 * Returns list of inquiry VPD pages available.
1538 * spin_lock_irqsave(host_set lock)
1541 unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1542 unsigned int buflen)
1544 const u8 pages[] = {
1545 0x00, /* page 0x00, this page */
1546 0x80, /* page 0x80, unit serial no page */
1547 0x83 /* page 0x83, device ident page */
1549 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1552 memcpy(rbuf + 4, pages, sizeof(pages));
1558 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1559 * @args: device IDENTIFY data / SCSI command of interest.
1560 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1561 * @buflen: Response buffer length.
1563 * Returns ATA device serial number.
1566 * spin_lock_irqsave(host_set lock)
1569 unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1570 unsigned int buflen)
1574 0x80, /* this page code */
1576 ATA_SERNO_LEN, /* page len */
1578 memcpy(rbuf, hdr, sizeof(hdr));
1580 if (buflen > (ATA_SERNO_LEN + 4 - 1))
1581 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1582 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1588 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1589 * @args: device IDENTIFY data / SCSI command of interest.
1590 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1591 * @buflen: Response buffer length.
1593 * Yields two logical unit device identification designators:
1594 * - vendor specific ASCII containing the ATA serial number
1595 * - SAT defined "t10 vendor id based" containing ASCII vendor
1596 * name ("ATA "), model and serial numbers.
1599 * spin_lock_irqsave(host_set lock)
1602 unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1603 unsigned int buflen)
1606 const int sat_model_serial_desc_len = 68;
1607 const int ata_model_byte_len = 40;
1609 rbuf[1] = 0x83; /* this page code */
1612 if (buflen > (ATA_SERNO_LEN + num + 3)) {
1613 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1615 rbuf[num + 3] = ATA_SERNO_LEN;
1617 ata_id_string(args->id, (unsigned char *) rbuf + num,
1618 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1619 num += ATA_SERNO_LEN;
1621 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1622 /* SAT defined lu model and serial numbers descriptor */
1623 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1626 rbuf[num + 3] = sat_model_serial_desc_len;
1628 memcpy(rbuf + num, "ATA ", 8);
1630 ata_id_string(args->id, (unsigned char *) rbuf + num,
1631 ATA_ID_PROD_OFS, ata_model_byte_len);
1632 num += ata_model_byte_len;
1633 ata_id_string(args->id, (unsigned char *) rbuf + num,
1634 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1635 num += ATA_SERNO_LEN;
1637 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1642 * ata_scsiop_noop - Command handler that simply returns success.
1643 * @args: device IDENTIFY data / SCSI command of interest.
1644 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1645 * @buflen: Response buffer length.
1647 * No operation. Simply returns success to caller, to indicate
1648 * that the caller should successfully complete this SCSI command.
1651 * spin_lock_irqsave(host_set lock)
1654 unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1655 unsigned int buflen)
1662 * ata_msense_push - Push data onto MODE SENSE data output buffer
1663 * @ptr_io: (input/output) Location to store more output data
1664 * @last: End of output data buffer
1665 * @buf: Pointer to BLOB being added to output buffer
1666 * @buflen: Length of BLOB
1668 * Store MODE SENSE data on an output buffer.
1674 static void ata_msense_push(u8 **ptr_io, const u8 *last,
1675 const u8 *buf, unsigned int buflen)
1679 if ((ptr + buflen - 1) > last)
1682 memcpy(ptr, buf, buflen);
1690 * ata_msense_caching - Simulate MODE SENSE caching info page
1691 * @id: device IDENTIFY data
1692 * @ptr_io: (input/output) Location to store more output data
1693 * @last: End of output data buffer
1695 * Generate a caching info page, which conditionally indicates
1696 * write caching to the SCSI layer, depending on device
1703 static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1706 u8 page[CACHE_MPAGE_LEN];
1708 memcpy(page, def_cache_mpage, sizeof(page));
1709 if (ata_id_wcache_enabled(id))
1710 page[2] |= (1 << 2); /* write cache enable */
1711 if (!ata_id_rahead_enabled(id))
1712 page[12] |= (1 << 5); /* disable read ahead */
1714 ata_msense_push(ptr_io, last, page, sizeof(page));
1715 return sizeof(page);
1719 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1720 * @dev: Device associated with this MODE SENSE command
1721 * @ptr_io: (input/output) Location to store more output data
1722 * @last: End of output data buffer
1724 * Generate a generic MODE SENSE control mode page.
1730 static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1732 ata_msense_push(ptr_io, last, def_control_mpage,
1733 sizeof(def_control_mpage));
1734 return sizeof(def_control_mpage);
1738 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1739 * @dev: Device associated with this MODE SENSE command
1740 * @ptr_io: (input/output) Location to store more output data
1741 * @last: End of output data buffer
1743 * Generate a generic MODE SENSE r/w error recovery page.
1749 static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1752 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1753 sizeof(def_rw_recovery_mpage));
1754 return sizeof(def_rw_recovery_mpage);
1758 * We can turn this into a real blacklist if it's needed, for now just
1759 * blacklist any Maxtor BANC1G10 revision firmware
1761 static int ata_dev_supports_fua(u16 *id)
1763 unsigned char model[41], fw[9];
1767 if (!ata_id_has_fua(id))
1770 ata_id_c_string(id, model, ATA_ID_PROD_OFS, sizeof(model));
1771 ata_id_c_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw));
1773 if (strcmp(model, "Maxtor"))
1775 if (strcmp(fw, "BANC1G10"))
1778 return 0; /* blacklisted */
1782 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1783 * @args: device IDENTIFY data / SCSI command of interest.
1784 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1785 * @buflen: Response buffer length.
1787 * Simulate MODE SENSE commands. Assume this is invoked for direct
1788 * access devices (e.g. disks) only. There should be no block
1789 * descriptor for other device types.
1792 * spin_lock_irqsave(host_set lock)
1795 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
1796 unsigned int buflen)
1798 struct ata_device *dev = args->dev;
1799 u8 *scsicmd = args->cmd->cmnd, *p, *last;
1800 const u8 sat_blk_desc[] = {
1801 0, 0, 0, 0, /* number of blocks: sat unspecified */
1803 0, 0x2, 0x0 /* block length: 512 bytes */
1806 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
1811 six_byte = (scsicmd[0] == MODE_SENSE);
1812 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
1814 * LLBA bit in msense(10) ignored (compliant)
1817 page_control = scsicmd[2] >> 6;
1818 switch (page_control) {
1819 case 0: /* current */
1820 break; /* supported */
1822 goto saving_not_supp;
1823 case 1: /* changeable */
1824 case 2: /* defaults */
1830 output_len = 4 + (ebd ? 8 : 0);
1831 alloc_len = scsicmd[4];
1833 output_len = 8 + (ebd ? 8 : 0);
1834 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
1836 minlen = (alloc_len < buflen) ? alloc_len : buflen;
1838 p = rbuf + output_len;
1839 last = rbuf + minlen - 1;
1841 pg = scsicmd[2] & 0x3f;
1844 * No mode subpages supported (yet) but asking for _all_
1845 * subpages may be valid
1847 if (spg && (spg != ALL_SUB_MPAGES))
1851 case RW_RECOVERY_MPAGE:
1852 output_len += ata_msense_rw_recovery(&p, last);
1856 output_len += ata_msense_caching(args->id, &p, last);
1859 case CONTROL_MPAGE: {
1860 output_len += ata_msense_ctl_mode(&p, last);
1865 output_len += ata_msense_rw_recovery(&p, last);
1866 output_len += ata_msense_caching(args->id, &p, last);
1867 output_len += ata_msense_ctl_mode(&p, last);
1870 default: /* invalid page code */
1878 if (ata_dev_supports_fua(args->id) && dev->flags & ATA_DFLAG_LBA48 &&
1879 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
1884 rbuf[0] = output_len;
1889 rbuf[3] = sizeof(sat_blk_desc);
1891 memcpy(rbuf + 4, sat_blk_desc,
1892 sizeof(sat_blk_desc));
1896 rbuf[0] = output_len >> 8;
1898 rbuf[1] = output_len;
1903 rbuf[7] = sizeof(sat_blk_desc);
1905 memcpy(rbuf + 8, sat_blk_desc,
1906 sizeof(sat_blk_desc));
1912 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
1913 /* "Invalid field in cbd" */
1917 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
1918 /* "Saving parameters not supported" */
1923 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
1924 * @args: device IDENTIFY data / SCSI command of interest.
1925 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1926 * @buflen: Response buffer length.
1928 * Simulate READ CAPACITY commands.
1931 * spin_lock_irqsave(host_set lock)
1934 unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
1935 unsigned int buflen)
1942 if (ata_id_has_lba(args->id)) {
1943 if (ata_id_has_lba48(args->id))
1944 n_sectors = ata_id_u64(args->id, 100);
1946 n_sectors = ata_id_u32(args->id, 60);
1948 /* CHS default translation */
1949 n_sectors = args->id[1] * args->id[3] * args->id[6];
1951 if (ata_id_current_chs_valid(args->id))
1952 /* CHS current translation */
1953 n_sectors = ata_id_u32(args->id, 57);
1956 n_sectors--; /* ATA TotalUserSectors - 1 */
1958 if (args->cmd->cmnd[0] == READ_CAPACITY) {
1959 if( n_sectors >= 0xffffffffULL )
1960 tmp = 0xffffffff ; /* Return max count on overflow */
1964 /* sector count, 32-bit */
1965 rbuf[0] = tmp >> (8 * 3);
1966 rbuf[1] = tmp >> (8 * 2);
1967 rbuf[2] = tmp >> (8 * 1);
1971 tmp = ATA_SECT_SIZE;
1976 /* sector count, 64-bit */
1977 tmp = n_sectors >> (8 * 4);
1978 rbuf[2] = tmp >> (8 * 3);
1979 rbuf[3] = tmp >> (8 * 2);
1980 rbuf[4] = tmp >> (8 * 1);
1983 rbuf[6] = tmp >> (8 * 3);
1984 rbuf[7] = tmp >> (8 * 2);
1985 rbuf[8] = tmp >> (8 * 1);
1989 tmp = ATA_SECT_SIZE;
1990 rbuf[12] = tmp >> 8;
1998 * ata_scsiop_report_luns - Simulate REPORT LUNS command
1999 * @args: device IDENTIFY data / SCSI command of interest.
2000 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2001 * @buflen: Response buffer length.
2003 * Simulate REPORT LUNS command.
2006 * spin_lock_irqsave(host_set lock)
2009 unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2010 unsigned int buflen)
2013 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2019 * ata_scsi_set_sense - Set SCSI sense data and status
2020 * @cmd: SCSI request to be handled
2021 * @sk: SCSI-defined sense key
2022 * @asc: SCSI-defined additional sense code
2023 * @ascq: SCSI-defined additional sense code qualifier
2025 * Helper function that builds a valid fixed format, current
2026 * response code and the given sense key (sk), additional sense
2027 * code (asc) and additional sense code qualifier (ascq) with
2028 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2029 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2035 void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2037 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2039 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2040 cmd->sense_buffer[2] = sk;
2041 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2042 cmd->sense_buffer[12] = asc;
2043 cmd->sense_buffer[13] = ascq;
2047 * ata_scsi_badcmd - End a SCSI request with an error
2048 * @cmd: SCSI request to be handled
2049 * @done: SCSI command completion function
2050 * @asc: SCSI-defined additional sense code
2051 * @ascq: SCSI-defined additional sense code qualifier
2053 * Helper function that completes a SCSI command with
2054 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2055 * and the specified additional sense codes.
2058 * spin_lock_irqsave(host_set lock)
2061 void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2064 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
2069 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2071 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2072 /* FIXME: not quite right; we don't want the
2073 * translation of taskfile registers into
2074 * a sense descriptors, since that's only
2075 * correct for ATA, not ATAPI
2077 ata_gen_ata_desc_sense(qc);
2080 qc->scsidone(qc->scsicmd);
2084 /* is it pointless to prefer PIO for "safety reasons"? */
2085 static inline int ata_pio_use_silly(struct ata_port *ap)
2087 return (ap->flags & ATA_FLAG_PIO_DMA);
2090 static void atapi_request_sense(struct ata_queued_cmd *qc)
2092 struct ata_port *ap = qc->ap;
2093 struct scsi_cmnd *cmd = qc->scsicmd;
2095 DPRINTK("ATAPI request sense\n");
2097 /* FIXME: is this needed? */
2098 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2100 ap->ops->tf_read(ap, &qc->tf);
2102 /* fill these in, for the case where they are -not- overwritten */
2103 cmd->sense_buffer[0] = 0x70;
2104 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2108 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2109 qc->dma_dir = DMA_FROM_DEVICE;
2111 memset(&qc->cdb, 0, qc->dev->cdb_len);
2112 qc->cdb[0] = REQUEST_SENSE;
2113 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2115 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2116 qc->tf.command = ATA_CMD_PACKET;
2118 if (ata_pio_use_silly(ap)) {
2119 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2120 qc->tf.feature |= ATAPI_PKT_DMA;
2122 qc->tf.protocol = ATA_PROT_ATAPI;
2123 qc->tf.lbam = (8 * 1024) & 0xff;
2124 qc->tf.lbah = (8 * 1024) >> 8;
2126 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2128 qc->complete_fn = atapi_sense_complete;
2135 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2137 struct scsi_cmnd *cmd = qc->scsicmd;
2138 unsigned int err_mask = qc->err_mask;
2140 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2142 /* handle completion from new EH */
2143 if (unlikely(qc->ap->ops->error_handler &&
2144 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2146 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2147 /* FIXME: not quite right; we don't want the
2148 * translation of taskfile registers into a
2149 * sense descriptors, since that's only
2150 * correct for ATA, not ATAPI
2152 ata_gen_ata_desc_sense(qc);
2155 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2161 /* successful completion or old EH failure path */
2162 if (unlikely(err_mask & AC_ERR_DEV)) {
2163 cmd->result = SAM_STAT_CHECK_CONDITION;
2164 atapi_request_sense(qc);
2166 } else if (unlikely(err_mask)) {
2167 /* FIXME: not quite right; we don't want the
2168 * translation of taskfile registers into
2169 * a sense descriptors, since that's only
2170 * correct for ATA, not ATAPI
2172 ata_gen_ata_desc_sense(qc);
2174 u8 *scsicmd = cmd->cmnd;
2176 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2178 unsigned int buflen;
2180 buflen = ata_scsi_rbuf_get(cmd, &buf);
2182 /* ATAPI devices typically report zero for their SCSI version,
2183 * and sometimes deviate from the spec WRT response data
2184 * format. If SCSI version is reported as zero like normal,
2185 * then we make the following fixups: 1) Fake MMC-5 version,
2186 * to indicate to the Linux scsi midlayer this is a modern
2187 * device. 2) Ensure response data format / ATAPI information
2188 * are always correct.
2195 ata_scsi_rbuf_put(cmd, buf);
2198 cmd->result = SAM_STAT_GOOD;
2205 * atapi_xlat - Initialize PACKET taskfile
2206 * @qc: command structure to be initialized
2207 * @scsicmd: SCSI CDB associated with this PACKET command
2210 * spin_lock_irqsave(host_set lock)
2213 * Zero on success, non-zero on failure.
2216 static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
2218 struct scsi_cmnd *cmd = qc->scsicmd;
2219 struct ata_device *dev = qc->dev;
2220 int using_pio = (dev->flags & ATA_DFLAG_PIO);
2221 int nodata = (cmd->sc_data_direction == DMA_NONE);
2224 /* Check whether ATAPI DMA is safe */
2225 if (ata_check_atapi_dma(qc))
2228 memcpy(&qc->cdb, scsicmd, dev->cdb_len);
2230 qc->complete_fn = atapi_qc_complete;
2232 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2233 if (cmd->sc_data_direction == DMA_TO_DEVICE) {
2234 qc->tf.flags |= ATA_TFLAG_WRITE;
2235 DPRINTK("direction: write\n");
2238 qc->tf.command = ATA_CMD_PACKET;
2240 /* no data, or PIO data xfer */
2241 if (using_pio || nodata) {
2243 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2245 qc->tf.protocol = ATA_PROT_ATAPI;
2246 qc->tf.lbam = (8 * 1024) & 0xff;
2247 qc->tf.lbah = (8 * 1024) >> 8;
2252 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2253 qc->tf.feature |= ATAPI_PKT_DMA;
2255 if (atapi_dmadir && (cmd->sc_data_direction != DMA_TO_DEVICE))
2256 /* some SATA bridges need us to indicate data xfer direction */
2257 qc->tf.feature |= ATAPI_DMADIR;
2260 qc->nbytes = cmd->bufflen;
2266 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2267 * @ap: ATA port to which the device is attached
2268 * @scsidev: SCSI device from which we derive the ATA device
2270 * Given various information provided in struct scsi_cmnd,
2271 * map that onto an ATA bus, and using that mapping
2272 * determine which ata_device is associated with the
2273 * SCSI command to be sent.
2276 * spin_lock_irqsave(host_set lock)
2279 * Associated ATA device, or %NULL if not found.
2282 static struct ata_device *
2283 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2285 struct ata_device *dev;
2287 /* skip commands not addressed to targets we simulate */
2288 if (likely(scsidev->id < ATA_MAX_DEVICES))
2289 dev = &ap->device[scsidev->id];
2293 if (unlikely((scsidev->channel != 0) ||
2294 (scsidev->lun != 0)))
2297 if (unlikely(!ata_dev_enabled(dev)))
2300 if (!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) {
2301 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2302 ata_dev_printk(dev, KERN_WARNING,
2303 "WARNING: ATAPI is %s, device ignored.\n",
2304 atapi_enabled ? "not supported with this driver" : "disabled");
2313 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2314 * @byte1: Byte 1 from pass-thru CDB.
2317 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2320 ata_scsi_map_proto(u8 byte1)
2322 switch((byte1 & 0x1e) >> 1) {
2323 case 3: /* Non-data */
2324 return ATA_PROT_NODATA;
2327 return ATA_PROT_DMA;
2329 case 4: /* PIO Data-in */
2330 case 5: /* PIO Data-out */
2331 return ATA_PROT_PIO;
2333 case 10: /* Device Reset */
2334 case 0: /* Hard Reset */
2336 case 2: /* Bus Idle */
2337 case 7: /* Packet */
2338 case 8: /* DMA Queued */
2339 case 9: /* Device Diagnostic */
2340 case 11: /* UDMA Data-in */
2341 case 12: /* UDMA Data-Out */
2342 case 13: /* FPDMA */
2343 default: /* Reserved */
2347 return ATA_PROT_UNKNOWN;
2351 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2352 * @qc: command structure to be initialized
2353 * @scsicmd: SCSI command to convert
2355 * Handles either 12 or 16-byte versions of the CDB.
2358 * Zero on success, non-zero on failure.
2361 ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd)
2363 struct ata_taskfile *tf = &(qc->tf);
2364 struct scsi_cmnd *cmd = qc->scsicmd;
2366 if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN)
2369 if (scsicmd[1] & 0xe0)
2370 /* PIO multi not supported yet */
2374 * 12 and 16 byte CDBs use different offsets to
2375 * provide the various register values.
2377 if (scsicmd[0] == ATA_16) {
2379 * 16-byte CDB - may contain extended commands.
2381 * If that is the case, copy the upper byte register values.
2383 if (scsicmd[1] & 0x01) {
2384 tf->hob_feature = scsicmd[3];
2385 tf->hob_nsect = scsicmd[5];
2386 tf->hob_lbal = scsicmd[7];
2387 tf->hob_lbam = scsicmd[9];
2388 tf->hob_lbah = scsicmd[11];
2389 tf->flags |= ATA_TFLAG_LBA48;
2391 tf->flags &= ~ATA_TFLAG_LBA48;
2394 * Always copy low byte, device and command registers.
2396 tf->feature = scsicmd[4];
2397 tf->nsect = scsicmd[6];
2398 tf->lbal = scsicmd[8];
2399 tf->lbam = scsicmd[10];
2400 tf->lbah = scsicmd[12];
2401 tf->device = scsicmd[13];
2402 tf->command = scsicmd[14];
2405 * 12-byte CDB - incapable of extended commands.
2407 tf->flags &= ~ATA_TFLAG_LBA48;
2409 tf->feature = scsicmd[3];
2410 tf->nsect = scsicmd[4];
2411 tf->lbal = scsicmd[5];
2412 tf->lbam = scsicmd[6];
2413 tf->lbah = scsicmd[7];
2414 tf->device = scsicmd[8];
2415 tf->command = scsicmd[9];
2418 * If slave is possible, enforce correct master/slave bit
2420 if (qc->ap->flags & ATA_FLAG_SLAVE_POSS)
2421 tf->device = qc->dev->devno ?
2422 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2425 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2426 * SET_FEATURES - XFER MODE must be preceded/succeeded
2427 * by an update to hardware-specific registers for each
2428 * controller (i.e. the reason for ->set_piomode(),
2429 * ->set_dmamode(), and ->post_set_mode() hooks).
2431 if ((tf->command == ATA_CMD_SET_FEATURES)
2432 && (tf->feature == SETFEATURES_XFER))
2436 * Set flags so that all registers will be written,
2437 * and pass on write indication (used for PIO/DMA
2440 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2442 if (cmd->sc_data_direction == DMA_TO_DEVICE)
2443 tf->flags |= ATA_TFLAG_WRITE;
2446 * Set transfer length.
2448 * TODO: find out if we need to do more here to
2449 * cover scatter/gather case.
2451 qc->nsect = cmd->bufflen / ATA_SECT_SIZE;
2453 /* request result TF */
2454 qc->flags |= ATA_QCFLAG_RESULT_TF;
2459 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x00);
2460 /* "Invalid field in cdb" */
2465 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2467 * @cmd: SCSI command opcode to consider
2469 * Look up the SCSI command given, and determine whether the
2470 * SCSI command is to be translated or simulated.
2473 * Pointer to translation function if possible, %NULL if not.
2476 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2486 return ata_scsi_rw_xlat;
2488 case SYNCHRONIZE_CACHE:
2489 if (ata_try_flush_cache(dev))
2490 return ata_scsi_flush_xlat;
2495 return ata_scsi_verify_xlat;
2499 return ata_scsi_pass_thru;
2502 return ata_scsi_start_stop_xlat;
2509 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2510 * @ap: ATA port to which the command was being sent
2511 * @cmd: SCSI command to dump
2513 * Prints the contents of a SCSI command via printk().
2516 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2517 struct scsi_cmnd *cmd)
2520 struct scsi_device *scsidev = cmd->device;
2521 u8 *scsicmd = cmd->cmnd;
2523 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2525 scsidev->channel, scsidev->id, scsidev->lun,
2526 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2527 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2532 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *cmd,
2533 void (*done)(struct scsi_cmnd *),
2534 struct ata_device *dev)
2538 if (dev->class == ATA_DEV_ATA) {
2539 ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
2543 rc = ata_scsi_translate(dev, cmd, done, xlat_func);
2545 ata_scsi_simulate(dev, cmd, done);
2547 rc = ata_scsi_translate(dev, cmd, done, atapi_xlat);
2553 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2554 * @cmd: SCSI command to be sent
2555 * @done: Completion function, called when command is complete
2557 * In some cases, this function translates SCSI commands into
2558 * ATA taskfiles, and queues the taskfiles to be sent to
2559 * hardware. In other cases, this function simulates a
2560 * SCSI device by evaluating and responding to certain
2561 * SCSI commands. This creates the overall effect of
2562 * ATA and ATAPI devices appearing as SCSI devices.
2565 * Releases scsi-layer-held lock, and obtains host_set lock.
2568 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2571 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2573 struct ata_port *ap;
2574 struct ata_device *dev;
2575 struct scsi_device *scsidev = cmd->device;
2576 struct Scsi_Host *shost = scsidev->host;
2579 ap = ata_shost_to_port(shost);
2581 spin_unlock(shost->host_lock);
2582 spin_lock(&ap->host_set->lock);
2584 ata_scsi_dump_cdb(ap, cmd);
2586 dev = ata_scsi_find_dev(ap, scsidev);
2588 rc = __ata_scsi_queuecmd(cmd, done, dev);
2590 cmd->result = (DID_BAD_TARGET << 16);
2594 spin_unlock(&ap->host_set->lock);
2595 spin_lock(shost->host_lock);
2600 * ata_scsi_simulate - simulate SCSI command on ATA device
2601 * @dev: the target device
2602 * @cmd: SCSI command being sent to device.
2603 * @done: SCSI command completion function.
2605 * Interprets and directly executes a select list of SCSI commands
2606 * that can be handled internally.
2609 * spin_lock_irqsave(host_set lock)
2612 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
2613 void (*done)(struct scsi_cmnd *))
2615 struct ata_scsi_args args;
2616 const u8 *scsicmd = cmd->cmnd;
2623 switch(scsicmd[0]) {
2624 /* no-op's, complete with success */
2625 case SYNCHRONIZE_CACHE:
2629 case TEST_UNIT_READY:
2630 case FORMAT_UNIT: /* FIXME: correct? */
2631 case SEND_DIAGNOSTIC: /* FIXME: correct? */
2632 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2636 if (scsicmd[1] & 2) /* is CmdDt set? */
2637 ata_scsi_invalid_field(cmd, done);
2638 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2639 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2640 else if (scsicmd[2] == 0x00)
2641 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2642 else if (scsicmd[2] == 0x80)
2643 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2644 else if (scsicmd[2] == 0x83)
2645 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2647 ata_scsi_invalid_field(cmd, done);
2652 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2655 case MODE_SELECT: /* unconditionally return */
2656 case MODE_SELECT_10: /* bad-field-in-cdb */
2657 ata_scsi_invalid_field(cmd, done);
2661 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2664 case SERVICE_ACTION_IN:
2665 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2666 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2668 ata_scsi_invalid_field(cmd, done);
2672 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2675 /* mandatory commands we haven't implemented yet */
2678 /* all other commands */
2680 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2681 /* "Invalid command operation code" */
2687 void ata_scsi_scan_host(struct ata_port *ap)
2689 struct ata_device *dev;
2692 if (ap->flags & ATA_FLAG_DISABLED)
2695 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2696 dev = &ap->device[i];
2698 if (ata_dev_enabled(dev))
2699 scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0);
2704 * ata_schedule_scsi_eh - schedule EH for SCSI host
2705 * @shost: SCSI host to invoke error handling on.
2707 * Schedule SCSI EH without scmd. This is a hack.
2710 * spin_lock_irqsave(host_set lock)
2712 void ata_schedule_scsi_eh(struct Scsi_Host *shost)
2714 unsigned long flags;
2716 spin_lock_irqsave(shost->host_lock, flags);
2718 if (scsi_host_set_state(shost, SHOST_RECOVERY) == 0 ||
2719 scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY) == 0) {
2720 shost->host_eh_scheduled++;
2721 scsi_eh_wakeup(shost);
2724 spin_unlock_irqrestore(shost->host_lock, flags);