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_tcq.h>
45 #include <scsi/scsi_transport.h>
46 #include <linux/libata.h>
47 #include <linux/hdreg.h>
48 #include <asm/uaccess.h>
52 #define SECTOR_SIZE 512
54 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd);
56 static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
57 const struct scsi_device *scsidev);
58 static struct ata_device * ata_scsi_find_dev(struct ata_port *ap,
59 const struct scsi_device *scsidev);
62 #define RW_RECOVERY_MPAGE 0x1
63 #define RW_RECOVERY_MPAGE_LEN 12
64 #define CACHE_MPAGE 0x8
65 #define CACHE_MPAGE_LEN 20
66 #define CONTROL_MPAGE 0xa
67 #define CONTROL_MPAGE_LEN 12
68 #define ALL_MPAGES 0x3f
69 #define ALL_SUB_MPAGES 0xff
72 static const u8 def_rw_recovery_mpage[] = {
74 RW_RECOVERY_MPAGE_LEN - 2,
75 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
76 (1 << 6), /* ARRE (auto read reallocation) */
77 0, /* read retry count */
79 0, /* write retry count */
83 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
86 0, /* contains WCE, needs to be 0 for logic */
87 0, 0, 0, 0, 0, 0, 0, 0, 0,
88 0, /* contains DRA, needs to be 0 for logic */
92 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
94 CONTROL_MPAGE_LEN - 2,
95 2, /* DSENSE=0, GLTSD=1 */
96 0, /* [QAM+QERR may be 1, see 05-359r1] */
97 0, 0, 0, 0, 0xff, 0xff,
98 0, 30 /* extended self test time, see 05-359r1 */
102 * libata transport template. libata doesn't do real transport stuff.
103 * It just needs the eh_timed_out hook.
105 struct scsi_transport_template ata_scsi_transport_template = {
106 .eh_strategy_handler = ata_scsi_error,
107 .eh_timed_out = ata_scsi_timed_out,
111 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
112 void (*done)(struct scsi_cmnd *))
114 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
115 /* "Invalid field in cbd" */
120 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
121 * @sdev: SCSI device for which BIOS geometry is to be determined
122 * @bdev: block device associated with @sdev
123 * @capacity: capacity of SCSI device
124 * @geom: location to which geometry will be output
126 * Generic bios head/sector/cylinder calculator
127 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
128 * mapping. Some situations may arise where the disk is not
129 * bootable if this is not used.
132 * Defined by the SCSI layer. We don't really care.
137 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
138 sector_t capacity, int geom[])
142 sector_div(capacity, 255*63);
149 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
150 * @scsidev: Device to which we are issuing command
151 * @arg: User provided data for issuing command
154 * Defined by the SCSI layer. We don't really care.
157 * Zero on success, negative errno on error.
160 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
163 u8 scsi_cmd[MAX_COMMAND_SIZE];
164 u8 args[4], *argbuf = NULL;
166 struct scsi_sense_hdr sshdr;
167 enum dma_data_direction data_dir;
172 if (copy_from_user(args, arg, sizeof(args)))
175 memset(scsi_cmd, 0, sizeof(scsi_cmd));
178 argsize = SECTOR_SIZE * args[3];
179 argbuf = kmalloc(argsize, GFP_KERNEL);
180 if (argbuf == NULL) {
185 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
186 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
187 block count in sector count field */
188 data_dir = DMA_FROM_DEVICE;
190 scsi_cmd[1] = (3 << 1); /* Non-data */
191 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
195 scsi_cmd[0] = ATA_16;
197 scsi_cmd[4] = args[2];
198 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
199 scsi_cmd[6] = args[3];
200 scsi_cmd[8] = args[1];
204 scsi_cmd[6] = args[1];
206 scsi_cmd[14] = args[0];
208 /* Good values for timeout and retries? Values below
209 from scsi_ioctl_send_command() for default case... */
210 if (scsi_execute_req(scsidev, scsi_cmd, data_dir, argbuf, argsize,
211 &sshdr, (10*HZ), 5)) {
216 /* Need code to retrieve data from check condition? */
219 && copy_to_user(arg + sizeof(args), argbuf, argsize))
229 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
230 * @scsidev: Device to which we are issuing command
231 * @arg: User provided data for issuing command
234 * Defined by the SCSI layer. We don't really care.
237 * Zero on success, negative errno on error.
239 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
242 u8 scsi_cmd[MAX_COMMAND_SIZE];
244 struct scsi_sense_hdr sshdr;
249 if (copy_from_user(args, arg, sizeof(args)))
252 memset(scsi_cmd, 0, sizeof(scsi_cmd));
253 scsi_cmd[0] = ATA_16;
254 scsi_cmd[1] = (3 << 1); /* Non-data */
255 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
256 scsi_cmd[4] = args[1];
257 scsi_cmd[6] = args[2];
258 scsi_cmd[8] = args[3];
259 scsi_cmd[10] = args[4];
260 scsi_cmd[12] = args[5];
261 scsi_cmd[14] = args[0];
263 /* Good values for timeout and retries? Values below
264 from scsi_ioctl_send_command() for default case... */
265 if (scsi_execute_req(scsidev, scsi_cmd, DMA_NONE, NULL, 0, &sshdr,
269 /* Need code to retrieve data from check condition? */
273 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
275 int val = -EINVAL, rc = -EINVAL;
278 case ATA_IOC_GET_IO32:
280 if (copy_to_user(arg, &val, 1))
284 case ATA_IOC_SET_IO32:
285 val = (unsigned long) arg;
291 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
293 return ata_cmd_ioctl(scsidev, arg);
295 case HDIO_DRIVE_TASK:
296 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
298 return ata_task_ioctl(scsidev, arg);
309 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
310 * @dev: ATA device to which the new command is attached
311 * @cmd: SCSI command that originated this ATA command
312 * @done: SCSI command completion function
314 * Obtain a reference to an unused ata_queued_cmd structure,
315 * which is the basic libata structure representing a single
316 * ATA command sent to the hardware.
318 * If a command was available, fill in the SCSI-specific
319 * portions of the structure with information on the
323 * spin_lock_irqsave(host_set lock)
326 * Command allocated, or %NULL if none available.
328 struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
329 struct scsi_cmnd *cmd,
330 void (*done)(struct scsi_cmnd *))
332 struct ata_queued_cmd *qc;
334 qc = ata_qc_new_init(dev);
340 qc->__sg = (struct scatterlist *) cmd->request_buffer;
341 qc->n_elem = cmd->use_sg;
343 qc->__sg = &qc->sgent;
347 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
355 * ata_dump_status - user friendly display of error info
356 * @id: id of the port in question
357 * @tf: ptr to filled out taskfile
359 * Decode and dump the ATA error/status registers for the user so
360 * that they have some idea what really happened at the non
361 * make-believe layer.
364 * inherited from caller
366 void ata_dump_status(unsigned id, struct ata_taskfile *tf)
368 u8 stat = tf->command, err = tf->feature;
370 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
371 if (stat & ATA_BUSY) {
372 printk("Busy }\n"); /* Data is not valid in this case */
374 if (stat & 0x40) printk("DriveReady ");
375 if (stat & 0x20) printk("DeviceFault ");
376 if (stat & 0x10) printk("SeekComplete ");
377 if (stat & 0x08) printk("DataRequest ");
378 if (stat & 0x04) printk("CorrectedError ");
379 if (stat & 0x02) printk("Index ");
380 if (stat & 0x01) printk("Error ");
384 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
385 if (err & 0x04) printk("DriveStatusError ");
387 if (err & 0x04) printk("BadCRC ");
388 else printk("Sector ");
390 if (err & 0x40) printk("UncorrectableError ");
391 if (err & 0x10) printk("SectorIdNotFound ");
392 if (err & 0x02) printk("TrackZeroNotFound ");
393 if (err & 0x01) printk("AddrMarkNotFound ");
399 int ata_scsi_device_resume(struct scsi_device *sdev)
401 struct ata_port *ap = ata_shost_to_port(sdev->host);
402 struct ata_device *dev = &ap->device[sdev->id];
404 return ata_device_resume(dev);
407 int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t state)
409 struct ata_port *ap = ata_shost_to_port(sdev->host);
410 struct ata_device *dev = &ap->device[sdev->id];
412 return ata_device_suspend(dev, state);
416 * ata_to_sense_error - convert ATA error to SCSI error
417 * @id: ATA device number
418 * @drv_stat: value contained in ATA status register
419 * @drv_err: value contained in ATA error register
420 * @sk: the sense key we'll fill out
421 * @asc: the additional sense code we'll fill out
422 * @ascq: the additional sense code qualifier we'll fill out
423 * @verbose: be verbose
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,
433 u8 *ascq, int verbose)
437 /* Based on the 3ware driver translation table */
438 static const 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 const 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 */
499 printk(KERN_WARNING "ata%u: no sense translation for "
500 "error 0x%02x\n", id, drv_err);
503 /* Fall back to interpreting status bits */
504 for (i = 0; stat_table[i][0] != 0xFF; i++) {
505 if (stat_table[i][0] & drv_stat) {
506 *sk = stat_table[i][1];
507 *asc = stat_table[i][2];
508 *ascq = stat_table[i][3];
512 /* No error? Undecoded? */
514 printk(KERN_WARNING "ata%u: no sense translation for "
515 "status: 0x%02x\n", id, drv_stat);
517 /* We need a sensible error return here, which is tricky, and one
518 that won't cause people to do things like return a disk wrongly */
519 *sk = ABORTED_COMMAND;
525 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
526 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
527 id, drv_stat, drv_err, *sk, *asc, *ascq);
532 * ata_gen_ata_desc_sense - Generate check condition sense block.
533 * @qc: Command that completed.
535 * This function is specific to the ATA descriptor format sense
536 * block specified for the ATA pass through commands. Regardless
537 * of whether the command errored or not, return a sense
538 * block. Copy all controller registers into the sense
539 * block. Clear sense key, ASC & ASCQ if there is no error.
542 * spin_lock_irqsave(host_set lock)
544 void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
546 struct scsi_cmnd *cmd = qc->scsicmd;
547 struct ata_taskfile *tf = &qc->result_tf;
548 unsigned char *sb = cmd->sense_buffer;
549 unsigned char *desc = sb + 8;
550 int verbose = qc->ap->ops->error_handler == NULL;
552 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
554 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
557 * Use ata_to_sense_error() to map status register bits
558 * onto sense key, asc & ascq.
561 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
562 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
563 &sb[1], &sb[2], &sb[3], verbose);
568 * Sense data is current and format is descriptor.
575 * Set length of additional sense data.
576 * Since we only populate descriptor 0, the total
577 * length is the same (fixed) length as descriptor 0.
579 desc[1] = sb[7] = 14;
582 * Copy registers into sense buffer.
585 desc[3] = tf->feature; /* == error reg */
590 desc[12] = tf->device;
591 desc[13] = tf->command; /* == status reg */
594 * Fill in Extend bit, and the high order bytes
597 if (tf->flags & ATA_TFLAG_LBA48) {
599 desc[4] = tf->hob_nsect;
600 desc[6] = tf->hob_lbal;
601 desc[8] = tf->hob_lbam;
602 desc[10] = tf->hob_lbah;
607 * ata_gen_fixed_sense - generate a SCSI fixed sense block
608 * @qc: Command that we are erroring out
610 * Leverage ata_to_sense_error() to give us the codes. Fit our
611 * LBA in here if there's room.
614 * inherited from caller
616 void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
618 struct scsi_cmnd *cmd = qc->scsicmd;
619 struct ata_taskfile *tf = &qc->result_tf;
620 unsigned char *sb = cmd->sense_buffer;
621 int verbose = qc->ap->ops->error_handler == NULL;
623 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
625 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
628 * Use ata_to_sense_error() to map status register bits
629 * onto sense key, asc & ascq.
632 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
633 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
634 &sb[2], &sb[12], &sb[13], verbose);
641 if (tf->flags & ATA_TFLAG_LBA48) {
642 /* TODO: find solution for LBA48 descriptors */
645 else if (tf->flags & ATA_TFLAG_LBA) {
646 /* A small (28b) LBA will fit in the 32b info field */
647 sb[0] |= 0x80; /* set valid bit */
648 sb[3] = tf->device & 0x0f;
659 static void ata_scsi_sdev_config(struct scsi_device *sdev)
661 sdev->use_10_for_rw = 1;
662 sdev->use_10_for_ms = 1;
665 static void ata_scsi_dev_config(struct scsi_device *sdev,
666 struct ata_device *dev)
668 unsigned int max_sectors;
670 /* TODO: 2048 is an arbitrary number, not the
671 * hardware maximum. This should be increased to
672 * 65534 when Jens Axboe's patch for dynamically
673 * determining max_sectors is merged.
675 max_sectors = ATA_MAX_SECTORS;
676 if (dev->flags & ATA_DFLAG_LBA48)
677 max_sectors = ATA_MAX_SECTORS_LBA48;
678 if (dev->max_sectors)
679 max_sectors = dev->max_sectors;
681 blk_queue_max_sectors(sdev->request_queue, max_sectors);
684 * SATA DMA transfers must be multiples of 4 byte, so
685 * we need to pad ATAPI transfers using an extra sg.
686 * Decrement max hw segments accordingly.
688 if (dev->class == ATA_DEV_ATAPI) {
689 request_queue_t *q = sdev->request_queue;
690 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
693 if (dev->flags & ATA_DFLAG_NCQ) {
696 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
697 depth = min(ATA_MAX_QUEUE - 1, depth);
698 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
703 * ata_scsi_slave_config - Set SCSI device attributes
704 * @sdev: SCSI device to examine
706 * This is called before we actually start reading
707 * and writing to the device, to configure certain
708 * SCSI mid-layer behaviors.
711 * Defined by SCSI layer. We don't really care.
714 int ata_scsi_slave_config(struct scsi_device *sdev)
716 ata_scsi_sdev_config(sdev);
718 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
720 if (sdev->id < ATA_MAX_DEVICES) {
722 struct ata_device *dev;
724 ap = ata_shost_to_port(sdev->host);
725 dev = &ap->device[sdev->id];
727 ata_scsi_dev_config(sdev, dev);
730 return 0; /* scsi layer doesn't check return value, sigh */
734 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
735 * @sdev: SCSI device to configure queue depth for
736 * @queue_depth: new queue depth
738 * This is libata standard hostt->change_queue_depth callback.
739 * SCSI will call into this callback when user tries to set queue
743 * SCSI layer (we don't care)
746 * Newly configured queue depth.
748 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
750 struct ata_port *ap = ata_shost_to_port(sdev->host);
751 struct ata_device *dev;
755 return sdev->queue_depth;
757 dev = ata_scsi_find_dev(ap, sdev);
758 if (!dev || !ata_dev_enabled(dev))
759 return sdev->queue_depth;
761 max_depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
762 max_depth = min(ATA_MAX_QUEUE - 1, max_depth);
763 if (queue_depth > max_depth)
764 queue_depth = max_depth;
766 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
771 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
772 * @qc: Storage for translated ATA taskfile
773 * @scsicmd: SCSI command to translate
775 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
776 * (to start). Perhaps these commands should be preceded by
777 * CHECK POWER MODE to see what power mode the device is already in.
778 * [See SAT revision 5 at www.t10.org]
781 * spin_lock_irqsave(host_set lock)
784 * Zero on success, non-zero on error.
787 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc,
790 struct ata_taskfile *tf = &qc->tf;
792 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
793 tf->protocol = ATA_PROT_NODATA;
794 if (scsicmd[1] & 0x1) {
795 ; /* ignore IMMED bit, violates sat-r05 */
797 if (scsicmd[4] & 0x2)
798 goto invalid_fld; /* LOEJ bit set not supported */
799 if (((scsicmd[4] >> 4) & 0xf) != 0)
800 goto invalid_fld; /* power conditions not supported */
801 if (scsicmd[4] & 0x1) {
802 tf->nsect = 1; /* 1 sector, lba=0 */
804 if (qc->dev->flags & ATA_DFLAG_LBA) {
805 tf->flags |= ATA_TFLAG_LBA;
810 tf->device |= ATA_LBA;
813 tf->lbal = 0x1; /* sect */
814 tf->lbam = 0x0; /* cyl low */
815 tf->lbah = 0x0; /* cyl high */
818 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
820 tf->nsect = 0; /* time period value (0 implies now) */
821 tf->command = ATA_CMD_STANDBY;
822 /* Consider: ATA STANDBY IMMEDIATE command */
825 * Standby and Idle condition timers could be implemented but that
826 * would require libata to implement the Power condition mode page
827 * and allow the user to change it. Changing mode pages requires
828 * MODE SELECT to be implemented.
834 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
835 /* "Invalid field in cbd" */
841 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
842 * @qc: Storage for translated ATA taskfile
843 * @scsicmd: SCSI command to translate (ignored)
845 * Sets up an ATA taskfile to issue FLUSH CACHE or
849 * spin_lock_irqsave(host_set lock)
852 * Zero on success, non-zero on error.
855 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
857 struct ata_taskfile *tf = &qc->tf;
859 tf->flags |= ATA_TFLAG_DEVICE;
860 tf->protocol = ATA_PROT_NODATA;
862 if ((qc->dev->flags & ATA_DFLAG_LBA48) &&
863 (ata_id_has_flush_ext(qc->dev->id)))
864 tf->command = ATA_CMD_FLUSH_EXT;
866 tf->command = ATA_CMD_FLUSH;
872 * scsi_6_lba_len - Get LBA and transfer length
873 * @scsicmd: SCSI command to translate
875 * Calculate LBA and transfer length for 6-byte commands.
879 * @plen: the transfer length
882 static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
887 VPRINTK("six-byte command\n");
889 lba |= ((u64)scsicmd[2]) << 8;
890 lba |= ((u64)scsicmd[3]);
892 len |= ((u32)scsicmd[4]);
899 * scsi_10_lba_len - Get LBA and transfer length
900 * @scsicmd: SCSI command to translate
902 * Calculate LBA and transfer length for 10-byte commands.
906 * @plen: the transfer length
909 static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
914 VPRINTK("ten-byte command\n");
916 lba |= ((u64)scsicmd[2]) << 24;
917 lba |= ((u64)scsicmd[3]) << 16;
918 lba |= ((u64)scsicmd[4]) << 8;
919 lba |= ((u64)scsicmd[5]);
921 len |= ((u32)scsicmd[7]) << 8;
922 len |= ((u32)scsicmd[8]);
929 * scsi_16_lba_len - Get LBA and transfer length
930 * @scsicmd: SCSI command to translate
932 * Calculate LBA and transfer length for 16-byte commands.
936 * @plen: the transfer length
939 static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
944 VPRINTK("sixteen-byte command\n");
946 lba |= ((u64)scsicmd[2]) << 56;
947 lba |= ((u64)scsicmd[3]) << 48;
948 lba |= ((u64)scsicmd[4]) << 40;
949 lba |= ((u64)scsicmd[5]) << 32;
950 lba |= ((u64)scsicmd[6]) << 24;
951 lba |= ((u64)scsicmd[7]) << 16;
952 lba |= ((u64)scsicmd[8]) << 8;
953 lba |= ((u64)scsicmd[9]);
955 len |= ((u32)scsicmd[10]) << 24;
956 len |= ((u32)scsicmd[11]) << 16;
957 len |= ((u32)scsicmd[12]) << 8;
958 len |= ((u32)scsicmd[13]);
965 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
966 * @qc: Storage for translated ATA taskfile
967 * @scsicmd: SCSI command to translate
969 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
972 * spin_lock_irqsave(host_set lock)
975 * Zero on success, non-zero on error.
978 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
980 struct ata_taskfile *tf = &qc->tf;
981 struct ata_device *dev = qc->dev;
982 u64 dev_sectors = qc->dev->n_sectors;
986 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
987 tf->protocol = ATA_PROT_NODATA;
989 if (scsicmd[0] == VERIFY)
990 scsi_10_lba_len(scsicmd, &block, &n_block);
991 else if (scsicmd[0] == VERIFY_16)
992 scsi_16_lba_len(scsicmd, &block, &n_block);
998 if (block >= dev_sectors)
1000 if ((block + n_block) > dev_sectors)
1003 if (dev->flags & ATA_DFLAG_LBA) {
1004 tf->flags |= ATA_TFLAG_LBA;
1006 if (lba_28_ok(block, n_block)) {
1008 tf->command = ATA_CMD_VERIFY;
1009 tf->device |= (block >> 24) & 0xf;
1010 } else if (lba_48_ok(block, n_block)) {
1011 if (!(dev->flags & ATA_DFLAG_LBA48))
1015 tf->flags |= ATA_TFLAG_LBA48;
1016 tf->command = ATA_CMD_VERIFY_EXT;
1018 tf->hob_nsect = (n_block >> 8) & 0xff;
1020 tf->hob_lbah = (block >> 40) & 0xff;
1021 tf->hob_lbam = (block >> 32) & 0xff;
1022 tf->hob_lbal = (block >> 24) & 0xff;
1024 /* request too large even for LBA48 */
1027 tf->nsect = n_block & 0xff;
1029 tf->lbah = (block >> 16) & 0xff;
1030 tf->lbam = (block >> 8) & 0xff;
1031 tf->lbal = block & 0xff;
1033 tf->device |= ATA_LBA;
1036 u32 sect, head, cyl, track;
1038 if (!lba_28_ok(block, n_block))
1041 /* Convert LBA to CHS */
1042 track = (u32)block / dev->sectors;
1043 cyl = track / dev->heads;
1044 head = track % dev->heads;
1045 sect = (u32)block % dev->sectors + 1;
1047 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1048 (u32)block, track, cyl, head, sect);
1050 /* Check whether the converted CHS can fit.
1054 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1057 tf->command = ATA_CMD_VERIFY;
1058 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1061 tf->lbah = cyl >> 8;
1068 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1069 /* "Invalid field in cbd" */
1073 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1074 /* "Logical Block Address out of range" */
1078 qc->scsicmd->result = SAM_STAT_GOOD;
1083 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1084 * @qc: Storage for translated ATA taskfile
1085 * @scsicmd: SCSI command to translate
1087 * Converts any of six SCSI read/write commands into the
1088 * ATA counterpart, including starting sector (LBA),
1089 * sector count, and taking into account the device's LBA48
1092 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1093 * %WRITE_16 are currently supported.
1096 * spin_lock_irqsave(host_set lock)
1099 * Zero on success, non-zero on error.
1102 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1104 struct ata_taskfile *tf = &qc->tf;
1105 struct ata_device *dev = qc->dev;
1109 qc->flags |= ATA_QCFLAG_IO;
1110 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1112 if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 ||
1113 scsicmd[0] == WRITE_16)
1114 tf->flags |= ATA_TFLAG_WRITE;
1116 /* Calculate the SCSI LBA, transfer length and FUA. */
1117 switch (scsicmd[0]) {
1120 scsi_10_lba_len(scsicmd, &block, &n_block);
1121 if (unlikely(scsicmd[1] & (1 << 3)))
1122 tf->flags |= ATA_TFLAG_FUA;
1126 scsi_6_lba_len(scsicmd, &block, &n_block);
1128 /* for 6-byte r/w commands, transfer length 0
1129 * means 256 blocks of data, not 0 block.
1136 scsi_16_lba_len(scsicmd, &block, &n_block);
1137 if (unlikely(scsicmd[1] & (1 << 3)))
1138 tf->flags |= ATA_TFLAG_FUA;
1141 DPRINTK("no-byte command\n");
1145 /* Check and compose ATA command */
1147 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1148 * length 0 means transfer 0 block of data.
1149 * However, for ATA R/W commands, sector count 0 means
1150 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1152 * WARNING: one or two older ATA drives treat 0 as 0...
1156 if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ) {
1158 if (!lba_48_ok(block, n_block))
1161 tf->protocol = ATA_PROT_NCQ;
1162 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
1164 if (tf->flags & ATA_TFLAG_WRITE)
1165 tf->command = ATA_CMD_FPDMA_WRITE;
1167 tf->command = ATA_CMD_FPDMA_READ;
1169 qc->nsect = n_block;
1171 tf->nsect = qc->tag << 3;
1172 tf->hob_feature = (n_block >> 8) & 0xff;
1173 tf->feature = n_block & 0xff;
1175 tf->hob_lbah = (block >> 40) & 0xff;
1176 tf->hob_lbam = (block >> 32) & 0xff;
1177 tf->hob_lbal = (block >> 24) & 0xff;
1178 tf->lbah = (block >> 16) & 0xff;
1179 tf->lbam = (block >> 8) & 0xff;
1180 tf->lbal = block & 0xff;
1182 tf->device = 1 << 6;
1183 if (tf->flags & ATA_TFLAG_FUA)
1184 tf->device |= 1 << 7;
1185 } else if (dev->flags & ATA_DFLAG_LBA) {
1186 tf->flags |= ATA_TFLAG_LBA;
1188 if (lba_28_ok(block, n_block)) {
1190 tf->device |= (block >> 24) & 0xf;
1191 } else if (lba_48_ok(block, n_block)) {
1192 if (!(dev->flags & ATA_DFLAG_LBA48))
1196 tf->flags |= ATA_TFLAG_LBA48;
1198 tf->hob_nsect = (n_block >> 8) & 0xff;
1200 tf->hob_lbah = (block >> 40) & 0xff;
1201 tf->hob_lbam = (block >> 32) & 0xff;
1202 tf->hob_lbal = (block >> 24) & 0xff;
1204 /* request too large even for LBA48 */
1207 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1210 qc->nsect = n_block;
1211 tf->nsect = n_block & 0xff;
1213 tf->lbah = (block >> 16) & 0xff;
1214 tf->lbam = (block >> 8) & 0xff;
1215 tf->lbal = block & 0xff;
1217 tf->device |= ATA_LBA;
1220 u32 sect, head, cyl, track;
1222 /* The request -may- be too large for CHS addressing. */
1223 if (!lba_28_ok(block, n_block))
1226 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1229 /* Convert LBA to CHS */
1230 track = (u32)block / dev->sectors;
1231 cyl = track / dev->heads;
1232 head = track % dev->heads;
1233 sect = (u32)block % dev->sectors + 1;
1235 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1236 (u32)block, track, cyl, head, sect);
1238 /* Check whether the converted CHS can fit.
1242 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1245 qc->nsect = n_block;
1246 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1249 tf->lbah = cyl >> 8;
1256 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1257 /* "Invalid field in cbd" */
1261 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1262 /* "Logical Block Address out of range" */
1266 qc->scsicmd->result = SAM_STAT_GOOD;
1270 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1272 struct scsi_cmnd *cmd = qc->scsicmd;
1273 u8 *cdb = cmd->cmnd;
1274 int need_sense = (qc->err_mask != 0);
1276 /* For ATA pass thru (SAT) commands, generate a sense block if
1277 * user mandated it or if there's an error. Note that if we
1278 * generate because the user forced us to, a check condition
1279 * is generated and the ATA register values are returned
1280 * whether the command completed successfully or not. If there
1281 * was no error, SK, ASC and ASCQ will all be zero.
1283 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1284 ((cdb[2] & 0x20) || need_sense)) {
1285 ata_gen_ata_desc_sense(qc);
1288 cmd->result = SAM_STAT_GOOD;
1290 /* TODO: decide which descriptor format to use
1291 * for 48b LBA devices and call that here
1292 * instead of the fixed desc, which is only
1293 * good for smaller LBA (and maybe CHS?)
1296 ata_gen_fixed_sense(qc);
1300 if (need_sense && !qc->ap->ops->error_handler)
1301 ata_dump_status(qc->ap->id, &qc->result_tf);
1309 * ata_scmd_need_defer - Check whether we need to defer scmd
1310 * @dev: ATA device to which the command is addressed
1311 * @is_io: Is the command IO (and thus possibly NCQ)?
1313 * NCQ and non-NCQ commands cannot run together. As upper layer
1314 * only knows the queue depth, we are responsible for maintaining
1315 * exclusion. This function checks whether a new command can be
1319 * spin_lock_irqsave(host_set lock)
1322 * 1 if deferring is needed, 0 otherwise.
1324 static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
1326 struct ata_port *ap = dev->ap;
1328 if (!(dev->flags & ATA_DFLAG_NCQ))
1332 if (!ata_tag_valid(ap->active_tag))
1335 if (!ata_tag_valid(ap->active_tag) && !ap->sactive)
1342 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1343 * @dev: ATA device to which the command is addressed
1344 * @cmd: SCSI command to execute
1345 * @done: SCSI command completion function
1346 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1348 * Our ->queuecommand() function has decided that the SCSI
1349 * command issued can be directly translated into an ATA
1350 * command, rather than handled internally.
1352 * This function sets up an ata_queued_cmd structure for the
1353 * SCSI command, and sends that ata_queued_cmd to the hardware.
1355 * The xlat_func argument (actor) returns 0 if ready to execute
1356 * ATA command, else 1 to finish translation. If 1 is returned
1357 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1358 * to be set reflecting an error condition or clean (early)
1362 * spin_lock_irqsave(host_set lock)
1365 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1366 * needs to be deferred.
1368 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1369 void (*done)(struct scsi_cmnd *),
1370 ata_xlat_func_t xlat_func)
1372 struct ata_queued_cmd *qc;
1373 u8 *scsicmd = cmd->cmnd;
1374 int is_io = xlat_func == ata_scsi_rw_xlat;
1378 if (unlikely(ata_scmd_need_defer(dev, is_io)))
1381 qc = ata_scsi_qc_new(dev, cmd, done);
1385 /* data is present; dma-map it */
1386 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1387 cmd->sc_data_direction == DMA_TO_DEVICE) {
1388 if (unlikely(cmd->request_bufflen < 1)) {
1389 ata_dev_printk(dev, KERN_WARNING,
1390 "WARNING: zero len r/w req\n");
1395 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
1397 ata_sg_init_one(qc, cmd->request_buffer,
1398 cmd->request_bufflen);
1400 qc->dma_dir = cmd->sc_data_direction;
1403 qc->complete_fn = ata_scsi_qc_complete;
1405 if (xlat_func(qc, scsicmd))
1408 /* select device, send command to hardware */
1417 DPRINTK("EXIT - early finish (good or error)\n");
1423 cmd->result = (DID_ERROR << 16);
1425 DPRINTK("EXIT - internal\n");
1429 DPRINTK("EXIT - defer\n");
1430 return SCSI_MLQUEUE_DEVICE_BUSY;
1434 * ata_scsi_rbuf_get - Map response buffer.
1435 * @cmd: SCSI command containing buffer to be mapped.
1436 * @buf_out: Pointer to mapped area.
1438 * Maps buffer contained within SCSI command @cmd.
1441 * spin_lock_irqsave(host_set lock)
1444 * Length of response buffer.
1447 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1450 unsigned int buflen;
1453 struct scatterlist *sg;
1455 sg = (struct scatterlist *) cmd->request_buffer;
1456 buf = kmap_atomic(sg->page, KM_USER0) + sg->offset;
1457 buflen = sg->length;
1459 buf = cmd->request_buffer;
1460 buflen = cmd->request_bufflen;
1468 * ata_scsi_rbuf_put - Unmap response buffer.
1469 * @cmd: SCSI command containing buffer to be unmapped.
1470 * @buf: buffer to unmap
1472 * Unmaps response buffer contained within @cmd.
1475 * spin_lock_irqsave(host_set lock)
1478 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1481 struct scatterlist *sg;
1483 sg = (struct scatterlist *) cmd->request_buffer;
1484 kunmap_atomic(buf - sg->offset, KM_USER0);
1489 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1490 * @args: device IDENTIFY data / SCSI command of interest.
1491 * @actor: Callback hook for desired SCSI command simulator
1493 * Takes care of the hard work of simulating a SCSI command...
1494 * Mapping the response buffer, calling the command's handler,
1495 * and handling the handler's return value. This return value
1496 * indicates whether the handler wishes the SCSI command to be
1497 * completed successfully (0), or not (in which case cmd->result
1498 * and sense buffer are assumed to be set).
1501 * spin_lock_irqsave(host_set lock)
1504 void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1505 unsigned int (*actor) (struct ata_scsi_args *args,
1506 u8 *rbuf, unsigned int buflen))
1509 unsigned int buflen, rc;
1510 struct scsi_cmnd *cmd = args->cmd;
1512 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1513 memset(rbuf, 0, buflen);
1514 rc = actor(args, rbuf, buflen);
1515 ata_scsi_rbuf_put(cmd, rbuf);
1518 cmd->result = SAM_STAT_GOOD;
1523 * ata_scsiop_inq_std - Simulate INQUIRY command
1524 * @args: device IDENTIFY data / SCSI command of interest.
1525 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1526 * @buflen: Response buffer length.
1528 * Returns standard device identification data associated
1529 * with non-VPD INQUIRY command output.
1532 * spin_lock_irqsave(host_set lock)
1535 unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1536 unsigned int buflen)
1541 0x5, /* claim SPC-3 version compatibility */
1546 /* set scsi removeable (RMB) bit per ata bit */
1547 if (ata_id_removeable(args->id))
1552 memcpy(rbuf, hdr, sizeof(hdr));
1555 memcpy(&rbuf[8], "ATA ", 8);
1556 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16);
1557 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4);
1558 if (rbuf[32] == 0 || rbuf[32] == ' ')
1559 memcpy(&rbuf[32], "n/a ", 4);
1563 const u8 versions[] = {
1564 0x60, /* SAM-3 (no version claimed) */
1567 0x20, /* SBC-2 (no version claimed) */
1570 0x60 /* SPC-3 (no version claimed) */
1573 memcpy(rbuf + 59, versions, sizeof(versions));
1580 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1581 * @args: device IDENTIFY data / SCSI command of interest.
1582 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1583 * @buflen: Response buffer length.
1585 * Returns list of inquiry VPD pages available.
1588 * spin_lock_irqsave(host_set lock)
1591 unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1592 unsigned int buflen)
1594 const u8 pages[] = {
1595 0x00, /* page 0x00, this page */
1596 0x80, /* page 0x80, unit serial no page */
1597 0x83 /* page 0x83, device ident page */
1599 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1602 memcpy(rbuf + 4, pages, sizeof(pages));
1608 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1609 * @args: device IDENTIFY data / SCSI command of interest.
1610 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1611 * @buflen: Response buffer length.
1613 * Returns ATA device serial number.
1616 * spin_lock_irqsave(host_set lock)
1619 unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1620 unsigned int buflen)
1624 0x80, /* this page code */
1626 ATA_SERNO_LEN, /* page len */
1628 memcpy(rbuf, hdr, sizeof(hdr));
1630 if (buflen > (ATA_SERNO_LEN + 4 - 1))
1631 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1632 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1638 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1639 * @args: device IDENTIFY data / SCSI command of interest.
1640 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1641 * @buflen: Response buffer length.
1643 * Yields two logical unit device identification designators:
1644 * - vendor specific ASCII containing the ATA serial number
1645 * - SAT defined "t10 vendor id based" containing ASCII vendor
1646 * name ("ATA "), model and serial numbers.
1649 * spin_lock_irqsave(host_set lock)
1652 unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1653 unsigned int buflen)
1656 const int sat_model_serial_desc_len = 68;
1657 const int ata_model_byte_len = 40;
1659 rbuf[1] = 0x83; /* this page code */
1662 if (buflen > (ATA_SERNO_LEN + num + 3)) {
1663 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1665 rbuf[num + 3] = ATA_SERNO_LEN;
1667 ata_id_string(args->id, (unsigned char *) rbuf + num,
1668 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1669 num += ATA_SERNO_LEN;
1671 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1672 /* SAT defined lu model and serial numbers descriptor */
1673 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1676 rbuf[num + 3] = sat_model_serial_desc_len;
1678 memcpy(rbuf + num, "ATA ", 8);
1680 ata_id_string(args->id, (unsigned char *) rbuf + num,
1681 ATA_ID_PROD_OFS, ata_model_byte_len);
1682 num += ata_model_byte_len;
1683 ata_id_string(args->id, (unsigned char *) rbuf + num,
1684 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1685 num += ATA_SERNO_LEN;
1687 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1692 * ata_scsiop_noop - Command handler that simply returns success.
1693 * @args: device IDENTIFY data / SCSI command of interest.
1694 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1695 * @buflen: Response buffer length.
1697 * No operation. Simply returns success to caller, to indicate
1698 * that the caller should successfully complete this SCSI command.
1701 * spin_lock_irqsave(host_set lock)
1704 unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1705 unsigned int buflen)
1712 * ata_msense_push - Push data onto MODE SENSE data output buffer
1713 * @ptr_io: (input/output) Location to store more output data
1714 * @last: End of output data buffer
1715 * @buf: Pointer to BLOB being added to output buffer
1716 * @buflen: Length of BLOB
1718 * Store MODE SENSE data on an output buffer.
1724 static void ata_msense_push(u8 **ptr_io, const u8 *last,
1725 const u8 *buf, unsigned int buflen)
1729 if ((ptr + buflen - 1) > last)
1732 memcpy(ptr, buf, buflen);
1740 * ata_msense_caching - Simulate MODE SENSE caching info page
1741 * @id: device IDENTIFY data
1742 * @ptr_io: (input/output) Location to store more output data
1743 * @last: End of output data buffer
1745 * Generate a caching info page, which conditionally indicates
1746 * write caching to the SCSI layer, depending on device
1753 static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1756 u8 page[CACHE_MPAGE_LEN];
1758 memcpy(page, def_cache_mpage, sizeof(page));
1759 if (ata_id_wcache_enabled(id))
1760 page[2] |= (1 << 2); /* write cache enable */
1761 if (!ata_id_rahead_enabled(id))
1762 page[12] |= (1 << 5); /* disable read ahead */
1764 ata_msense_push(ptr_io, last, page, sizeof(page));
1765 return sizeof(page);
1769 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1770 * @dev: Device associated with this MODE SENSE command
1771 * @ptr_io: (input/output) Location to store more output data
1772 * @last: End of output data buffer
1774 * Generate a generic MODE SENSE control mode page.
1780 static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1782 ata_msense_push(ptr_io, last, def_control_mpage,
1783 sizeof(def_control_mpage));
1784 return sizeof(def_control_mpage);
1788 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1789 * @dev: Device associated with this MODE SENSE command
1790 * @ptr_io: (input/output) Location to store more output data
1791 * @last: End of output data buffer
1793 * Generate a generic MODE SENSE r/w error recovery page.
1799 static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1802 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1803 sizeof(def_rw_recovery_mpage));
1804 return sizeof(def_rw_recovery_mpage);
1808 * We can turn this into a real blacklist if it's needed, for now just
1809 * blacklist any Maxtor BANC1G10 revision firmware
1811 static int ata_dev_supports_fua(u16 *id)
1813 unsigned char model[41], fw[9];
1817 if (!ata_id_has_fua(id))
1820 ata_id_c_string(id, model, ATA_ID_PROD_OFS, sizeof(model));
1821 ata_id_c_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw));
1823 if (strcmp(model, "Maxtor"))
1825 if (strcmp(fw, "BANC1G10"))
1828 return 0; /* blacklisted */
1832 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1833 * @args: device IDENTIFY data / SCSI command of interest.
1834 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1835 * @buflen: Response buffer length.
1837 * Simulate MODE SENSE commands. Assume this is invoked for direct
1838 * access devices (e.g. disks) only. There should be no block
1839 * descriptor for other device types.
1842 * spin_lock_irqsave(host_set lock)
1845 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
1846 unsigned int buflen)
1848 struct ata_device *dev = args->dev;
1849 u8 *scsicmd = args->cmd->cmnd, *p, *last;
1850 const u8 sat_blk_desc[] = {
1851 0, 0, 0, 0, /* number of blocks: sat unspecified */
1853 0, 0x2, 0x0 /* block length: 512 bytes */
1856 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
1861 six_byte = (scsicmd[0] == MODE_SENSE);
1862 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
1864 * LLBA bit in msense(10) ignored (compliant)
1867 page_control = scsicmd[2] >> 6;
1868 switch (page_control) {
1869 case 0: /* current */
1870 break; /* supported */
1872 goto saving_not_supp;
1873 case 1: /* changeable */
1874 case 2: /* defaults */
1880 output_len = 4 + (ebd ? 8 : 0);
1881 alloc_len = scsicmd[4];
1883 output_len = 8 + (ebd ? 8 : 0);
1884 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
1886 minlen = (alloc_len < buflen) ? alloc_len : buflen;
1888 p = rbuf + output_len;
1889 last = rbuf + minlen - 1;
1891 pg = scsicmd[2] & 0x3f;
1894 * No mode subpages supported (yet) but asking for _all_
1895 * subpages may be valid
1897 if (spg && (spg != ALL_SUB_MPAGES))
1901 case RW_RECOVERY_MPAGE:
1902 output_len += ata_msense_rw_recovery(&p, last);
1906 output_len += ata_msense_caching(args->id, &p, last);
1909 case CONTROL_MPAGE: {
1910 output_len += ata_msense_ctl_mode(&p, last);
1915 output_len += ata_msense_rw_recovery(&p, last);
1916 output_len += ata_msense_caching(args->id, &p, last);
1917 output_len += ata_msense_ctl_mode(&p, last);
1920 default: /* invalid page code */
1928 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
1929 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
1934 rbuf[0] = output_len;
1939 rbuf[3] = sizeof(sat_blk_desc);
1941 memcpy(rbuf + 4, sat_blk_desc,
1942 sizeof(sat_blk_desc));
1946 rbuf[0] = output_len >> 8;
1948 rbuf[1] = output_len;
1953 rbuf[7] = sizeof(sat_blk_desc);
1955 memcpy(rbuf + 8, sat_blk_desc,
1956 sizeof(sat_blk_desc));
1962 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
1963 /* "Invalid field in cbd" */
1967 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
1968 /* "Saving parameters not supported" */
1973 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
1974 * @args: device IDENTIFY data / SCSI command of interest.
1975 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1976 * @buflen: Response buffer length.
1978 * Simulate READ CAPACITY commands.
1981 * spin_lock_irqsave(host_set lock)
1984 unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
1985 unsigned int buflen)
1992 if (ata_id_has_lba(args->id)) {
1993 if (ata_id_has_lba48(args->id))
1994 n_sectors = ata_id_u64(args->id, 100);
1996 n_sectors = ata_id_u32(args->id, 60);
1998 /* CHS default translation */
1999 n_sectors = args->id[1] * args->id[3] * args->id[6];
2001 if (ata_id_current_chs_valid(args->id))
2002 /* CHS current translation */
2003 n_sectors = ata_id_u32(args->id, 57);
2006 n_sectors--; /* ATA TotalUserSectors - 1 */
2008 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2009 if( n_sectors >= 0xffffffffULL )
2010 tmp = 0xffffffff ; /* Return max count on overflow */
2014 /* sector count, 32-bit */
2015 rbuf[0] = tmp >> (8 * 3);
2016 rbuf[1] = tmp >> (8 * 2);
2017 rbuf[2] = tmp >> (8 * 1);
2021 tmp = ATA_SECT_SIZE;
2026 /* sector count, 64-bit */
2027 tmp = n_sectors >> (8 * 4);
2028 rbuf[2] = tmp >> (8 * 3);
2029 rbuf[3] = tmp >> (8 * 2);
2030 rbuf[4] = tmp >> (8 * 1);
2033 rbuf[6] = tmp >> (8 * 3);
2034 rbuf[7] = tmp >> (8 * 2);
2035 rbuf[8] = tmp >> (8 * 1);
2039 tmp = ATA_SECT_SIZE;
2040 rbuf[12] = tmp >> 8;
2048 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2049 * @args: device IDENTIFY data / SCSI command of interest.
2050 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2051 * @buflen: Response buffer length.
2053 * Simulate REPORT LUNS command.
2056 * spin_lock_irqsave(host_set lock)
2059 unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2060 unsigned int buflen)
2063 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2069 * ata_scsi_set_sense - Set SCSI sense data and status
2070 * @cmd: SCSI request to be handled
2071 * @sk: SCSI-defined sense key
2072 * @asc: SCSI-defined additional sense code
2073 * @ascq: SCSI-defined additional sense code qualifier
2075 * Helper function that builds a valid fixed format, current
2076 * response code and the given sense key (sk), additional sense
2077 * code (asc) and additional sense code qualifier (ascq) with
2078 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2079 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2085 void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2087 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2089 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2090 cmd->sense_buffer[2] = sk;
2091 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2092 cmd->sense_buffer[12] = asc;
2093 cmd->sense_buffer[13] = ascq;
2097 * ata_scsi_badcmd - End a SCSI request with an error
2098 * @cmd: SCSI request to be handled
2099 * @done: SCSI command completion function
2100 * @asc: SCSI-defined additional sense code
2101 * @ascq: SCSI-defined additional sense code qualifier
2103 * Helper function that completes a SCSI command with
2104 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2105 * and the specified additional sense codes.
2108 * spin_lock_irqsave(host_set lock)
2111 void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2114 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
2119 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2121 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2122 /* FIXME: not quite right; we don't want the
2123 * translation of taskfile registers into
2124 * a sense descriptors, since that's only
2125 * correct for ATA, not ATAPI
2127 ata_gen_ata_desc_sense(qc);
2130 qc->scsidone(qc->scsicmd);
2134 /* is it pointless to prefer PIO for "safety reasons"? */
2135 static inline int ata_pio_use_silly(struct ata_port *ap)
2137 return (ap->flags & ATA_FLAG_PIO_DMA);
2140 static void atapi_request_sense(struct ata_queued_cmd *qc)
2142 struct ata_port *ap = qc->ap;
2143 struct scsi_cmnd *cmd = qc->scsicmd;
2145 DPRINTK("ATAPI request sense\n");
2147 /* FIXME: is this needed? */
2148 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2150 ap->ops->tf_read(ap, &qc->tf);
2152 /* fill these in, for the case where they are -not- overwritten */
2153 cmd->sense_buffer[0] = 0x70;
2154 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2158 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2159 qc->dma_dir = DMA_FROM_DEVICE;
2161 memset(&qc->cdb, 0, qc->dev->cdb_len);
2162 qc->cdb[0] = REQUEST_SENSE;
2163 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2165 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2166 qc->tf.command = ATA_CMD_PACKET;
2168 if (ata_pio_use_silly(ap)) {
2169 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2170 qc->tf.feature |= ATAPI_PKT_DMA;
2172 qc->tf.protocol = ATA_PROT_ATAPI;
2173 qc->tf.lbam = (8 * 1024) & 0xff;
2174 qc->tf.lbah = (8 * 1024) >> 8;
2176 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2178 qc->complete_fn = atapi_sense_complete;
2185 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2187 struct scsi_cmnd *cmd = qc->scsicmd;
2188 unsigned int err_mask = qc->err_mask;
2190 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2192 /* handle completion from new EH */
2193 if (unlikely(qc->ap->ops->error_handler &&
2194 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2196 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2197 /* FIXME: not quite right; we don't want the
2198 * translation of taskfile registers into a
2199 * sense descriptors, since that's only
2200 * correct for ATA, not ATAPI
2202 ata_gen_ata_desc_sense(qc);
2205 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2211 /* successful completion or old EH failure path */
2212 if (unlikely(err_mask & AC_ERR_DEV)) {
2213 cmd->result = SAM_STAT_CHECK_CONDITION;
2214 atapi_request_sense(qc);
2216 } else if (unlikely(err_mask)) {
2217 /* FIXME: not quite right; we don't want the
2218 * translation of taskfile registers into
2219 * a sense descriptors, since that's only
2220 * correct for ATA, not ATAPI
2222 ata_gen_ata_desc_sense(qc);
2224 u8 *scsicmd = cmd->cmnd;
2226 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2228 unsigned int buflen;
2230 buflen = ata_scsi_rbuf_get(cmd, &buf);
2232 /* ATAPI devices typically report zero for their SCSI version,
2233 * and sometimes deviate from the spec WRT response data
2234 * format. If SCSI version is reported as zero like normal,
2235 * then we make the following fixups: 1) Fake MMC-5 version,
2236 * to indicate to the Linux scsi midlayer this is a modern
2237 * device. 2) Ensure response data format / ATAPI information
2238 * are always correct.
2245 ata_scsi_rbuf_put(cmd, buf);
2248 cmd->result = SAM_STAT_GOOD;
2255 * atapi_xlat - Initialize PACKET taskfile
2256 * @qc: command structure to be initialized
2257 * @scsicmd: SCSI CDB associated with this PACKET command
2260 * spin_lock_irqsave(host_set lock)
2263 * Zero on success, non-zero on failure.
2266 static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
2268 struct scsi_cmnd *cmd = qc->scsicmd;
2269 struct ata_device *dev = qc->dev;
2270 int using_pio = (dev->flags & ATA_DFLAG_PIO);
2271 int nodata = (cmd->sc_data_direction == DMA_NONE);
2274 /* Check whether ATAPI DMA is safe */
2275 if (ata_check_atapi_dma(qc))
2278 memcpy(&qc->cdb, scsicmd, dev->cdb_len);
2280 qc->complete_fn = atapi_qc_complete;
2282 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2283 if (cmd->sc_data_direction == DMA_TO_DEVICE) {
2284 qc->tf.flags |= ATA_TFLAG_WRITE;
2285 DPRINTK("direction: write\n");
2288 qc->tf.command = ATA_CMD_PACKET;
2290 /* no data, or PIO data xfer */
2291 if (using_pio || nodata) {
2293 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2295 qc->tf.protocol = ATA_PROT_ATAPI;
2296 qc->tf.lbam = (8 * 1024) & 0xff;
2297 qc->tf.lbah = (8 * 1024) >> 8;
2302 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2303 qc->tf.feature |= ATAPI_PKT_DMA;
2305 if (atapi_dmadir && (cmd->sc_data_direction != DMA_TO_DEVICE))
2306 /* some SATA bridges need us to indicate data xfer direction */
2307 qc->tf.feature |= ATAPI_DMADIR;
2310 qc->nbytes = cmd->bufflen;
2315 static struct ata_device * ata_find_dev(struct ata_port *ap, int id)
2317 if (likely(id < ATA_MAX_DEVICES))
2318 return &ap->device[id];
2322 static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
2323 const struct scsi_device *scsidev)
2325 /* skip commands not addressed to targets we simulate */
2326 if (unlikely(scsidev->channel || scsidev->lun))
2329 return ata_find_dev(ap, scsidev->id);
2333 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2334 * @ap: ATA port to which the device is attached
2335 * @scsidev: SCSI device from which we derive the ATA device
2337 * Given various information provided in struct scsi_cmnd,
2338 * map that onto an ATA bus, and using that mapping
2339 * determine which ata_device is associated with the
2340 * SCSI command to be sent.
2343 * spin_lock_irqsave(host_set lock)
2346 * Associated ATA device, or %NULL if not found.
2348 static struct ata_device *
2349 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2351 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2353 if (unlikely(!dev || !ata_dev_enabled(dev)))
2356 if (!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) {
2357 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2358 ata_dev_printk(dev, KERN_WARNING,
2359 "WARNING: ATAPI is %s, device ignored.\n",
2360 atapi_enabled ? "not supported with this driver" : "disabled");
2369 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2370 * @byte1: Byte 1 from pass-thru CDB.
2373 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2376 ata_scsi_map_proto(u8 byte1)
2378 switch((byte1 & 0x1e) >> 1) {
2379 case 3: /* Non-data */
2380 return ATA_PROT_NODATA;
2383 return ATA_PROT_DMA;
2385 case 4: /* PIO Data-in */
2386 case 5: /* PIO Data-out */
2387 return ATA_PROT_PIO;
2389 case 10: /* Device Reset */
2390 case 0: /* Hard Reset */
2392 case 2: /* Bus Idle */
2393 case 7: /* Packet */
2394 case 8: /* DMA Queued */
2395 case 9: /* Device Diagnostic */
2396 case 11: /* UDMA Data-in */
2397 case 12: /* UDMA Data-Out */
2398 case 13: /* FPDMA */
2399 default: /* Reserved */
2403 return ATA_PROT_UNKNOWN;
2407 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2408 * @qc: command structure to be initialized
2409 * @scsicmd: SCSI command to convert
2411 * Handles either 12 or 16-byte versions of the CDB.
2414 * Zero on success, non-zero on failure.
2417 ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd)
2419 struct ata_taskfile *tf = &(qc->tf);
2420 struct scsi_cmnd *cmd = qc->scsicmd;
2421 struct ata_device *dev = qc->dev;
2423 if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN)
2426 /* We may not issue DMA commands if no DMA mode is set */
2427 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2430 if (scsicmd[1] & 0xe0)
2431 /* PIO multi not supported yet */
2435 * 12 and 16 byte CDBs use different offsets to
2436 * provide the various register values.
2438 if (scsicmd[0] == ATA_16) {
2440 * 16-byte CDB - may contain extended commands.
2442 * If that is the case, copy the upper byte register values.
2444 if (scsicmd[1] & 0x01) {
2445 tf->hob_feature = scsicmd[3];
2446 tf->hob_nsect = scsicmd[5];
2447 tf->hob_lbal = scsicmd[7];
2448 tf->hob_lbam = scsicmd[9];
2449 tf->hob_lbah = scsicmd[11];
2450 tf->flags |= ATA_TFLAG_LBA48;
2452 tf->flags &= ~ATA_TFLAG_LBA48;
2455 * Always copy low byte, device and command registers.
2457 tf->feature = scsicmd[4];
2458 tf->nsect = scsicmd[6];
2459 tf->lbal = scsicmd[8];
2460 tf->lbam = scsicmd[10];
2461 tf->lbah = scsicmd[12];
2462 tf->device = scsicmd[13];
2463 tf->command = scsicmd[14];
2466 * 12-byte CDB - incapable of extended commands.
2468 tf->flags &= ~ATA_TFLAG_LBA48;
2470 tf->feature = scsicmd[3];
2471 tf->nsect = scsicmd[4];
2472 tf->lbal = scsicmd[5];
2473 tf->lbam = scsicmd[6];
2474 tf->lbah = scsicmd[7];
2475 tf->device = scsicmd[8];
2476 tf->command = scsicmd[9];
2479 * If slave is possible, enforce correct master/slave bit
2481 if (qc->ap->flags & ATA_FLAG_SLAVE_POSS)
2482 tf->device = qc->dev->devno ?
2483 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2486 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2487 * SET_FEATURES - XFER MODE must be preceded/succeeded
2488 * by an update to hardware-specific registers for each
2489 * controller (i.e. the reason for ->set_piomode(),
2490 * ->set_dmamode(), and ->post_set_mode() hooks).
2492 if ((tf->command == ATA_CMD_SET_FEATURES)
2493 && (tf->feature == SETFEATURES_XFER))
2497 * Set flags so that all registers will be written,
2498 * and pass on write indication (used for PIO/DMA
2501 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2503 if (cmd->sc_data_direction == DMA_TO_DEVICE)
2504 tf->flags |= ATA_TFLAG_WRITE;
2507 * Set transfer length.
2509 * TODO: find out if we need to do more here to
2510 * cover scatter/gather case.
2512 qc->nsect = cmd->bufflen / ATA_SECT_SIZE;
2514 /* request result TF */
2515 qc->flags |= ATA_QCFLAG_RESULT_TF;
2520 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x00);
2521 /* "Invalid field in cdb" */
2526 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2528 * @cmd: SCSI command opcode to consider
2530 * Look up the SCSI command given, and determine whether the
2531 * SCSI command is to be translated or simulated.
2534 * Pointer to translation function if possible, %NULL if not.
2537 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2547 return ata_scsi_rw_xlat;
2549 case SYNCHRONIZE_CACHE:
2550 if (ata_try_flush_cache(dev))
2551 return ata_scsi_flush_xlat;
2556 return ata_scsi_verify_xlat;
2560 return ata_scsi_pass_thru;
2563 return ata_scsi_start_stop_xlat;
2570 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2571 * @ap: ATA port to which the command was being sent
2572 * @cmd: SCSI command to dump
2574 * Prints the contents of a SCSI command via printk().
2577 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2578 struct scsi_cmnd *cmd)
2581 struct scsi_device *scsidev = cmd->device;
2582 u8 *scsicmd = cmd->cmnd;
2584 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2586 scsidev->channel, scsidev->id, scsidev->lun,
2587 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2588 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2593 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *cmd,
2594 void (*done)(struct scsi_cmnd *),
2595 struct ata_device *dev)
2599 if (dev->class == ATA_DEV_ATA) {
2600 ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
2604 rc = ata_scsi_translate(dev, cmd, done, xlat_func);
2606 ata_scsi_simulate(dev, cmd, done);
2608 rc = ata_scsi_translate(dev, cmd, done, atapi_xlat);
2614 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2615 * @cmd: SCSI command to be sent
2616 * @done: Completion function, called when command is complete
2618 * In some cases, this function translates SCSI commands into
2619 * ATA taskfiles, and queues the taskfiles to be sent to
2620 * hardware. In other cases, this function simulates a
2621 * SCSI device by evaluating and responding to certain
2622 * SCSI commands. This creates the overall effect of
2623 * ATA and ATAPI devices appearing as SCSI devices.
2626 * Releases scsi-layer-held lock, and obtains host_set lock.
2629 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2632 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2634 struct ata_port *ap;
2635 struct ata_device *dev;
2636 struct scsi_device *scsidev = cmd->device;
2637 struct Scsi_Host *shost = scsidev->host;
2640 ap = ata_shost_to_port(shost);
2642 spin_unlock(shost->host_lock);
2643 spin_lock(&ap->host_set->lock);
2645 ata_scsi_dump_cdb(ap, cmd);
2647 dev = ata_scsi_find_dev(ap, scsidev);
2649 rc = __ata_scsi_queuecmd(cmd, done, dev);
2651 cmd->result = (DID_BAD_TARGET << 16);
2655 spin_unlock(&ap->host_set->lock);
2656 spin_lock(shost->host_lock);
2661 * ata_scsi_simulate - simulate SCSI command on ATA device
2662 * @dev: the target device
2663 * @cmd: SCSI command being sent to device.
2664 * @done: SCSI command completion function.
2666 * Interprets and directly executes a select list of SCSI commands
2667 * that can be handled internally.
2670 * spin_lock_irqsave(host_set lock)
2673 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
2674 void (*done)(struct scsi_cmnd *))
2676 struct ata_scsi_args args;
2677 const u8 *scsicmd = cmd->cmnd;
2684 switch(scsicmd[0]) {
2685 /* no-op's, complete with success */
2686 case SYNCHRONIZE_CACHE:
2690 case TEST_UNIT_READY:
2691 case FORMAT_UNIT: /* FIXME: correct? */
2692 case SEND_DIAGNOSTIC: /* FIXME: correct? */
2693 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2697 if (scsicmd[1] & 2) /* is CmdDt set? */
2698 ata_scsi_invalid_field(cmd, done);
2699 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2700 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2701 else if (scsicmd[2] == 0x00)
2702 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2703 else if (scsicmd[2] == 0x80)
2704 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2705 else if (scsicmd[2] == 0x83)
2706 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2708 ata_scsi_invalid_field(cmd, done);
2713 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2716 case MODE_SELECT: /* unconditionally return */
2717 case MODE_SELECT_10: /* bad-field-in-cdb */
2718 ata_scsi_invalid_field(cmd, done);
2722 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2725 case SERVICE_ACTION_IN:
2726 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2727 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2729 ata_scsi_invalid_field(cmd, done);
2733 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2736 /* mandatory commands we haven't implemented yet */
2739 /* all other commands */
2741 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2742 /* "Invalid command operation code" */
2748 void ata_scsi_scan_host(struct ata_port *ap)
2750 struct ata_device *dev;
2753 if (ap->flags & ATA_FLAG_DISABLED)
2756 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2757 dev = &ap->device[i];
2759 if (ata_dev_enabled(dev))
2760 scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0);