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);
56 static void ata_scsi_error(struct Scsi_Host *host);
57 enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
59 #define RW_RECOVERY_MPAGE 0x1
60 #define RW_RECOVERY_MPAGE_LEN 12
61 #define CACHE_MPAGE 0x8
62 #define CACHE_MPAGE_LEN 20
63 #define CONTROL_MPAGE 0xa
64 #define CONTROL_MPAGE_LEN 12
65 #define ALL_MPAGES 0x3f
66 #define ALL_SUB_MPAGES 0xff
69 static const u8 def_rw_recovery_mpage[] = {
71 RW_RECOVERY_MPAGE_LEN - 2,
72 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
73 (1 << 6), /* ARRE (auto read reallocation) */
74 0, /* read retry count */
76 0, /* write retry count */
80 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
83 0, /* contains WCE, needs to be 0 for logic */
84 0, 0, 0, 0, 0, 0, 0, 0, 0,
85 0, /* contains DRA, needs to be 0 for logic */
89 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
91 CONTROL_MPAGE_LEN - 2,
92 2, /* DSENSE=0, GLTSD=1 */
93 0, /* [QAM+QERR may be 1, see 05-359r1] */
94 0, 0, 0, 0, 0xff, 0xff,
95 0, 30 /* extended self test time, see 05-359r1 */
99 * libata transport template. libata doesn't do real transport stuff.
100 * It just needs the eh_timed_out hook.
102 struct scsi_transport_template ata_scsi_transport_template = {
103 .eh_strategy_handler = ata_scsi_error,
104 .eh_timed_out = ata_scsi_timed_out,
108 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
109 void (*done)(struct scsi_cmnd *))
111 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
112 /* "Invalid field in cbd" */
117 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
118 * @sdev: SCSI device for which BIOS geometry is to be determined
119 * @bdev: block device associated with @sdev
120 * @capacity: capacity of SCSI device
121 * @geom: location to which geometry will be output
123 * Generic bios head/sector/cylinder calculator
124 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
125 * mapping. Some situations may arise where the disk is not
126 * bootable if this is not used.
129 * Defined by the SCSI layer. We don't really care.
134 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
135 sector_t capacity, int geom[])
139 sector_div(capacity, 255*63);
146 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
147 * @scsidev: Device to which we are issuing command
148 * @arg: User provided data for issuing command
151 * Defined by the SCSI layer. We don't really care.
154 * Zero on success, negative errno on error.
157 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
160 u8 scsi_cmd[MAX_COMMAND_SIZE];
161 u8 args[4], *argbuf = NULL;
163 struct scsi_sense_hdr sshdr;
164 enum dma_data_direction data_dir;
169 if (copy_from_user(args, arg, sizeof(args)))
172 memset(scsi_cmd, 0, sizeof(scsi_cmd));
175 argsize = SECTOR_SIZE * args[3];
176 argbuf = kmalloc(argsize, GFP_KERNEL);
177 if (argbuf == NULL) {
182 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
183 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
184 block count in sector count field */
185 data_dir = DMA_FROM_DEVICE;
187 scsi_cmd[1] = (3 << 1); /* Non-data */
188 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
192 scsi_cmd[0] = ATA_16;
194 scsi_cmd[4] = args[2];
195 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
196 scsi_cmd[6] = args[3];
197 scsi_cmd[8] = args[1];
201 scsi_cmd[6] = args[1];
203 scsi_cmd[14] = args[0];
205 /* Good values for timeout and retries? Values below
206 from scsi_ioctl_send_command() for default case... */
207 if (scsi_execute_req(scsidev, scsi_cmd, data_dir, argbuf, argsize,
208 &sshdr, (10*HZ), 5)) {
213 /* Need code to retrieve data from check condition? */
216 && copy_to_user(arg + sizeof(args), argbuf, argsize))
226 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
227 * @scsidev: Device to which we are issuing command
228 * @arg: User provided data for issuing command
231 * Defined by the SCSI layer. We don't really care.
234 * Zero on success, negative errno on error.
236 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
239 u8 scsi_cmd[MAX_COMMAND_SIZE];
241 struct scsi_sense_hdr sshdr;
246 if (copy_from_user(args, arg, sizeof(args)))
249 memset(scsi_cmd, 0, sizeof(scsi_cmd));
250 scsi_cmd[0] = ATA_16;
251 scsi_cmd[1] = (3 << 1); /* Non-data */
252 /* scsi_cmd[2] is already 0 -- no off.line, cc, or data xfer */
253 scsi_cmd[4] = args[1];
254 scsi_cmd[6] = args[2];
255 scsi_cmd[8] = args[3];
256 scsi_cmd[10] = args[4];
257 scsi_cmd[12] = args[5];
258 scsi_cmd[14] = args[0];
260 /* Good values for timeout and retries? Values below
261 from scsi_ioctl_send_command() for default case... */
262 if (scsi_execute_req(scsidev, scsi_cmd, DMA_NONE, NULL, 0, &sshdr,
266 /* Need code to retrieve data from check condition? */
270 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
272 int val = -EINVAL, rc = -EINVAL;
275 case ATA_IOC_GET_IO32:
277 if (copy_to_user(arg, &val, 1))
281 case ATA_IOC_SET_IO32:
282 val = (unsigned long) arg;
288 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
290 return ata_cmd_ioctl(scsidev, arg);
292 case HDIO_DRIVE_TASK:
293 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
295 return ata_task_ioctl(scsidev, arg);
306 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
307 * @ap: ATA port to which the new command is attached
308 * @dev: ATA device to which the new command is attached
309 * @cmd: SCSI command that originated this ATA command
310 * @done: SCSI command completion function
312 * Obtain a reference to an unused ata_queued_cmd structure,
313 * which is the basic libata structure representing a single
314 * ATA command sent to the hardware.
316 * If a command was available, fill in the SCSI-specific
317 * portions of the structure with information on the
321 * spin_lock_irqsave(host_set lock)
324 * Command allocated, or %NULL if none available.
326 struct ata_queued_cmd *ata_scsi_qc_new(struct ata_port *ap,
327 struct ata_device *dev,
328 struct scsi_cmnd *cmd,
329 void (*done)(struct scsi_cmnd *))
331 struct ata_queued_cmd *qc;
333 qc = ata_qc_new_init(ap, dev);
339 qc->__sg = (struct scatterlist *) cmd->request_buffer;
340 qc->n_elem = cmd->use_sg;
342 qc->__sg = &qc->sgent;
346 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
354 * ata_dump_status - user friendly display of error info
355 * @id: id of the port in question
356 * @tf: ptr to filled out taskfile
358 * Decode and dump the ATA error/status registers for the user so
359 * that they have some idea what really happened at the non
360 * make-believe layer.
363 * inherited from caller
365 void ata_dump_status(unsigned id, struct ata_taskfile *tf)
367 u8 stat = tf->command, err = tf->feature;
369 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
370 if (stat & ATA_BUSY) {
371 printk("Busy }\n"); /* Data is not valid in this case */
373 if (stat & 0x40) printk("DriveReady ");
374 if (stat & 0x20) printk("DeviceFault ");
375 if (stat & 0x10) printk("SeekComplete ");
376 if (stat & 0x08) printk("DataRequest ");
377 if (stat & 0x04) printk("CorrectedError ");
378 if (stat & 0x02) printk("Index ");
379 if (stat & 0x01) printk("Error ");
383 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
384 if (err & 0x04) printk("DriveStatusError ");
386 if (err & 0x04) printk("BadCRC ");
387 else printk("Sector ");
389 if (err & 0x40) printk("UncorrectableError ");
390 if (err & 0x10) printk("SectorIdNotFound ");
391 if (err & 0x02) printk("TrackZeroNotFound ");
392 if (err & 0x01) printk("AddrMarkNotFound ");
398 int ata_scsi_device_resume(struct scsi_device *sdev)
400 struct ata_port *ap = (struct ata_port *) &sdev->host->hostdata[0];
401 struct ata_device *dev = &ap->device[sdev->id];
403 return ata_device_resume(ap, dev);
406 int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t state)
408 struct ata_port *ap = (struct ata_port *) &sdev->host->hostdata[0];
409 struct ata_device *dev = &ap->device[sdev->id];
411 return ata_device_suspend(ap, dev, state);
415 * ata_to_sense_error - convert ATA error to SCSI error
416 * @id: ATA device number
417 * @drv_stat: value contained in ATA status register
418 * @drv_err: value contained in ATA error register
419 * @sk: the sense key we'll fill out
420 * @asc: the additional sense code we'll fill out
421 * @ascq: the additional sense code qualifier we'll fill out
423 * Converts an ATA error into a SCSI error. Fill out pointers to
424 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
425 * format sense blocks.
428 * spin_lock_irqsave(host_set lock)
430 void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
435 /* Based on the 3ware driver translation table */
436 static const unsigned char sense_table[][4] = {
438 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
440 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
442 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
443 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
444 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
445 /* MC|ID|ABRT|TRK0|MARK */
446 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
448 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
449 /* Bad address mark */
450 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
452 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
454 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
455 /* Media change request */
456 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
458 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
460 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
462 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
463 /* BBD - block marked bad */
464 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
465 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
467 static const unsigned char stat_table[][4] = {
468 /* Must be first because BUSY means no other bits valid */
469 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
470 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
471 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
472 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
473 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
477 * Is this an error we can process/parse
479 if (drv_stat & ATA_BUSY) {
480 drv_err = 0; /* Ignore the err bits, they're invalid */
484 /* Look for drv_err */
485 for (i = 0; sense_table[i][0] != 0xFF; i++) {
486 /* Look for best matches first */
487 if ((sense_table[i][0] & drv_err) ==
489 *sk = sense_table[i][1];
490 *asc = sense_table[i][2];
491 *ascq = sense_table[i][3];
495 /* No immediate match */
496 printk(KERN_WARNING "ata%u: no sense translation for "
497 "error 0x%02x\n", id, drv_err);
500 /* Fall back to interpreting status bits */
501 for (i = 0; stat_table[i][0] != 0xFF; i++) {
502 if (stat_table[i][0] & drv_stat) {
503 *sk = stat_table[i][1];
504 *asc = stat_table[i][2];
505 *ascq = stat_table[i][3];
509 /* No error? Undecoded? */
510 printk(KERN_WARNING "ata%u: no sense translation for status: 0x%02x\n",
513 /* We need a sensible error return here, which is tricky, and one
514 that won't cause people to do things like return a disk wrongly */
515 *sk = ABORTED_COMMAND;
524 * ata_gen_ata_desc_sense - Generate check condition sense block.
525 * @qc: Command that completed.
527 * This function is specific to the ATA descriptor format sense
528 * block specified for the ATA pass through commands. Regardless
529 * of whether the command errored or not, return a sense
530 * block. Copy all controller registers into the sense
531 * block. Clear sense key, ASC & ASCQ if there is no error.
534 * spin_lock_irqsave(host_set lock)
536 void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
538 struct scsi_cmnd *cmd = qc->scsicmd;
539 struct ata_taskfile *tf = &qc->tf;
540 unsigned char *sb = cmd->sense_buffer;
541 unsigned char *desc = sb + 8;
543 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
545 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
548 * Read the controller registers.
550 WARN_ON(qc->ap->ops->tf_read == NULL);
551 qc->ap->ops->tf_read(qc->ap, tf);
554 * Use ata_to_sense_error() to map status register bits
555 * onto sense key, asc & ascq.
557 if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
558 ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
559 &sb[1], &sb[2], &sb[3]);
564 * Sense data is current and format is descriptor.
571 * Set length of additional sense data.
572 * Since we only populate descriptor 0, the total
573 * length is the same (fixed) length as descriptor 0.
575 desc[1] = sb[7] = 14;
578 * Copy registers into sense buffer.
581 desc[3] = tf->feature; /* == error reg */
586 desc[12] = tf->device;
587 desc[13] = tf->command; /* == status reg */
590 * Fill in Extend bit, and the high order bytes
593 if (tf->flags & ATA_TFLAG_LBA48) {
595 desc[4] = tf->hob_nsect;
596 desc[6] = tf->hob_lbal;
597 desc[8] = tf->hob_lbam;
598 desc[10] = tf->hob_lbah;
603 * ata_gen_fixed_sense - generate a SCSI fixed sense block
604 * @qc: Command that we are erroring out
606 * Leverage ata_to_sense_error() to give us the codes. Fit our
607 * LBA in here if there's room.
610 * inherited from caller
612 void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
614 struct scsi_cmnd *cmd = qc->scsicmd;
615 struct ata_taskfile *tf = &qc->tf;
616 unsigned char *sb = cmd->sense_buffer;
618 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
620 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
623 * Read the controller registers.
625 WARN_ON(qc->ap->ops->tf_read == NULL);
626 qc->ap->ops->tf_read(qc->ap, tf);
629 * Use ata_to_sense_error() to map status register bits
630 * onto sense key, asc & ascq.
632 if (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]);
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)
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);
695 * ata_scsi_slave_config - Set SCSI device attributes
696 * @sdev: SCSI device to examine
698 * This is called before we actually start reading
699 * and writing to the device, to configure certain
700 * SCSI mid-layer behaviors.
703 * Defined by SCSI layer. We don't really care.
706 int ata_scsi_slave_config(struct scsi_device *sdev)
708 ata_scsi_sdev_config(sdev);
710 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
712 if (sdev->id < ATA_MAX_DEVICES) {
714 struct ata_device *dev;
716 ap = (struct ata_port *) &sdev->host->hostdata[0];
717 dev = &ap->device[sdev->id];
719 ata_scsi_dev_config(sdev, dev);
722 return 0; /* scsi layer doesn't check return value, sigh */
726 * ata_scsi_timed_out - SCSI layer time out callback
727 * @cmd: timed out SCSI command
729 * Handles SCSI layer timeout. We race with normal completion of
730 * the qc for @cmd. If the qc is already gone, we lose and let
731 * the scsi command finish (EH_HANDLED). Otherwise, the qc has
732 * timed out and EH should be invoked. Prevent ata_qc_complete()
733 * from finishing it by setting EH_SCHEDULED and return
737 * Called from timer context
740 * EH_HANDLED or EH_NOT_HANDLED
742 enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd)
744 struct Scsi_Host *host = cmd->device->host;
745 struct ata_port *ap = (struct ata_port *) &host->hostdata[0];
747 struct ata_queued_cmd *qc;
748 enum scsi_eh_timer_return ret = EH_HANDLED;
752 spin_lock_irqsave(&ap->host_set->lock, flags);
753 qc = ata_qc_from_tag(ap, ap->active_tag);
755 WARN_ON(qc->scsicmd != cmd);
756 qc->flags |= ATA_QCFLAG_EH_SCHEDULED;
757 qc->err_mask |= AC_ERR_TIMEOUT;
758 ret = EH_NOT_HANDLED;
760 spin_unlock_irqrestore(&ap->host_set->lock, flags);
762 DPRINTK("EXIT, ret=%d\n", ret);
767 * ata_scsi_error - SCSI layer error handler callback
768 * @host: SCSI host on which error occurred
770 * Handles SCSI-layer-thrown error events.
773 * Inherited from SCSI layer (none, can sleep)
776 static void ata_scsi_error(struct Scsi_Host *host)
783 ap = (struct ata_port *) &host->hostdata[0];
785 spin_lock_irqsave(&ap->host_set->lock, flags);
786 WARN_ON(ap->flags & ATA_FLAG_IN_EH);
787 ap->flags |= ATA_FLAG_IN_EH;
788 WARN_ON(ata_qc_from_tag(ap, ap->active_tag) == NULL);
789 spin_unlock_irqrestore(&ap->host_set->lock, flags);
791 ata_port_flush_task(ap);
793 ap->ops->eng_timeout(ap);
795 WARN_ON(host->host_failed || !list_empty(&host->eh_cmd_q));
797 scsi_eh_flush_done_q(&ap->eh_done_q);
799 spin_lock_irqsave(&ap->host_set->lock, flags);
800 ap->flags &= ~ATA_FLAG_IN_EH;
801 spin_unlock_irqrestore(&ap->host_set->lock, flags);
806 static void ata_eh_scsidone(struct scsi_cmnd *scmd)
811 static void __ata_eh_qc_complete(struct ata_queued_cmd *qc)
813 struct ata_port *ap = qc->ap;
814 struct scsi_cmnd *scmd = qc->scsicmd;
817 spin_lock_irqsave(&ap->host_set->lock, flags);
818 qc->scsidone = ata_eh_scsidone;
819 __ata_qc_complete(qc);
820 WARN_ON(ata_tag_valid(qc->tag));
821 spin_unlock_irqrestore(&ap->host_set->lock, flags);
823 scsi_eh_finish_cmd(scmd, &ap->eh_done_q);
827 * ata_eh_qc_complete - Complete an active ATA command from EH
828 * @qc: Command to complete
830 * Indicate to the mid and upper layers that an ATA command has
831 * completed. To be used from EH.
833 void ata_eh_qc_complete(struct ata_queued_cmd *qc)
835 struct scsi_cmnd *scmd = qc->scsicmd;
836 scmd->retries = scmd->allowed;
837 __ata_eh_qc_complete(qc);
841 * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH
842 * @qc: Command to retry
844 * Indicate to the mid and upper layers that an ATA command
845 * should be retried. To be used from EH.
847 * SCSI midlayer limits the number of retries to scmd->allowed.
848 * This function might need to adjust scmd->retries for commands
849 * which get retried due to unrelated NCQ failures.
851 void ata_eh_qc_retry(struct ata_queued_cmd *qc)
853 __ata_eh_qc_complete(qc);
857 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
858 * @qc: Storage for translated ATA taskfile
859 * @scsicmd: SCSI command to translate
861 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
862 * (to start). Perhaps these commands should be preceded by
863 * CHECK POWER MODE to see what power mode the device is already in.
864 * [See SAT revision 5 at www.t10.org]
867 * spin_lock_irqsave(host_set lock)
870 * Zero on success, non-zero on error.
873 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc,
876 struct ata_taskfile *tf = &qc->tf;
878 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
879 tf->protocol = ATA_PROT_NODATA;
880 if (scsicmd[1] & 0x1) {
881 ; /* ignore IMMED bit, violates sat-r05 */
883 if (scsicmd[4] & 0x2)
884 goto invalid_fld; /* LOEJ bit set not supported */
885 if (((scsicmd[4] >> 4) & 0xf) != 0)
886 goto invalid_fld; /* power conditions not supported */
887 if (scsicmd[4] & 0x1) {
888 tf->nsect = 1; /* 1 sector, lba=0 */
890 if (qc->dev->flags & ATA_DFLAG_LBA) {
891 qc->tf.flags |= ATA_TFLAG_LBA;
896 tf->device |= ATA_LBA;
899 tf->lbal = 0x1; /* sect */
900 tf->lbam = 0x0; /* cyl low */
901 tf->lbah = 0x0; /* cyl high */
904 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
906 tf->nsect = 0; /* time period value (0 implies now) */
907 tf->command = ATA_CMD_STANDBY;
908 /* Consider: ATA STANDBY IMMEDIATE command */
911 * Standby and Idle condition timers could be implemented but that
912 * would require libata to implement the Power condition mode page
913 * and allow the user to change it. Changing mode pages requires
914 * MODE SELECT to be implemented.
920 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
921 /* "Invalid field in cbd" */
927 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
928 * @qc: Storage for translated ATA taskfile
929 * @scsicmd: SCSI command to translate (ignored)
931 * Sets up an ATA taskfile to issue FLUSH CACHE or
935 * spin_lock_irqsave(host_set lock)
938 * Zero on success, non-zero on error.
941 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
943 struct ata_taskfile *tf = &qc->tf;
945 tf->flags |= ATA_TFLAG_DEVICE;
946 tf->protocol = ATA_PROT_NODATA;
948 if ((qc->dev->flags & ATA_DFLAG_LBA48) &&
949 (ata_id_has_flush_ext(qc->dev->id)))
950 tf->command = ATA_CMD_FLUSH_EXT;
952 tf->command = ATA_CMD_FLUSH;
958 * scsi_6_lba_len - Get LBA and transfer length
959 * @scsicmd: SCSI command to translate
961 * Calculate LBA and transfer length for 6-byte commands.
965 * @plen: the transfer length
968 static void scsi_6_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
973 VPRINTK("six-byte command\n");
975 lba |= ((u64)scsicmd[2]) << 8;
976 lba |= ((u64)scsicmd[3]);
978 len |= ((u32)scsicmd[4]);
985 * scsi_10_lba_len - Get LBA and transfer length
986 * @scsicmd: SCSI command to translate
988 * Calculate LBA and transfer length for 10-byte commands.
992 * @plen: the transfer length
995 static void scsi_10_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
1000 VPRINTK("ten-byte command\n");
1002 lba |= ((u64)scsicmd[2]) << 24;
1003 lba |= ((u64)scsicmd[3]) << 16;
1004 lba |= ((u64)scsicmd[4]) << 8;
1005 lba |= ((u64)scsicmd[5]);
1007 len |= ((u32)scsicmd[7]) << 8;
1008 len |= ((u32)scsicmd[8]);
1015 * scsi_16_lba_len - Get LBA and transfer length
1016 * @scsicmd: SCSI command to translate
1018 * Calculate LBA and transfer length for 16-byte commands.
1022 * @plen: the transfer length
1025 static void scsi_16_lba_len(const u8 *scsicmd, u64 *plba, u32 *plen)
1030 VPRINTK("sixteen-byte command\n");
1032 lba |= ((u64)scsicmd[2]) << 56;
1033 lba |= ((u64)scsicmd[3]) << 48;
1034 lba |= ((u64)scsicmd[4]) << 40;
1035 lba |= ((u64)scsicmd[5]) << 32;
1036 lba |= ((u64)scsicmd[6]) << 24;
1037 lba |= ((u64)scsicmd[7]) << 16;
1038 lba |= ((u64)scsicmd[8]) << 8;
1039 lba |= ((u64)scsicmd[9]);
1041 len |= ((u32)scsicmd[10]) << 24;
1042 len |= ((u32)scsicmd[11]) << 16;
1043 len |= ((u32)scsicmd[12]) << 8;
1044 len |= ((u32)scsicmd[13]);
1051 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1052 * @qc: Storage for translated ATA taskfile
1053 * @scsicmd: SCSI command to translate
1055 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1058 * spin_lock_irqsave(host_set lock)
1061 * Zero on success, non-zero on error.
1064 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1066 struct ata_taskfile *tf = &qc->tf;
1067 struct ata_device *dev = qc->dev;
1068 u64 dev_sectors = qc->dev->n_sectors;
1072 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1073 tf->protocol = ATA_PROT_NODATA;
1075 if (scsicmd[0] == VERIFY)
1076 scsi_10_lba_len(scsicmd, &block, &n_block);
1077 else if (scsicmd[0] == VERIFY_16)
1078 scsi_16_lba_len(scsicmd, &block, &n_block);
1084 if (block >= dev_sectors)
1086 if ((block + n_block) > dev_sectors)
1089 if (dev->flags & ATA_DFLAG_LBA) {
1090 tf->flags |= ATA_TFLAG_LBA;
1092 if (lba_28_ok(block, n_block)) {
1094 tf->command = ATA_CMD_VERIFY;
1095 tf->device |= (block >> 24) & 0xf;
1096 } else if (lba_48_ok(block, n_block)) {
1097 if (!(dev->flags & ATA_DFLAG_LBA48))
1101 tf->flags |= ATA_TFLAG_LBA48;
1102 tf->command = ATA_CMD_VERIFY_EXT;
1104 tf->hob_nsect = (n_block >> 8) & 0xff;
1106 tf->hob_lbah = (block >> 40) & 0xff;
1107 tf->hob_lbam = (block >> 32) & 0xff;
1108 tf->hob_lbal = (block >> 24) & 0xff;
1110 /* request too large even for LBA48 */
1113 tf->nsect = n_block & 0xff;
1115 tf->lbah = (block >> 16) & 0xff;
1116 tf->lbam = (block >> 8) & 0xff;
1117 tf->lbal = block & 0xff;
1119 tf->device |= ATA_LBA;
1122 u32 sect, head, cyl, track;
1124 if (!lba_28_ok(block, n_block))
1127 /* Convert LBA to CHS */
1128 track = (u32)block / dev->sectors;
1129 cyl = track / dev->heads;
1130 head = track % dev->heads;
1131 sect = (u32)block % dev->sectors + 1;
1133 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1134 (u32)block, track, cyl, head, sect);
1136 /* Check whether the converted CHS can fit.
1140 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1143 tf->command = ATA_CMD_VERIFY;
1144 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1147 tf->lbah = cyl >> 8;
1154 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1155 /* "Invalid field in cbd" */
1159 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1160 /* "Logical Block Address out of range" */
1164 qc->scsicmd->result = SAM_STAT_GOOD;
1169 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1170 * @qc: Storage for translated ATA taskfile
1171 * @scsicmd: SCSI command to translate
1173 * Converts any of six SCSI read/write commands into the
1174 * ATA counterpart, including starting sector (LBA),
1175 * sector count, and taking into account the device's LBA48
1178 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1179 * %WRITE_16 are currently supported.
1182 * spin_lock_irqsave(host_set lock)
1185 * Zero on success, non-zero on error.
1188 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
1190 struct ata_taskfile *tf = &qc->tf;
1191 struct ata_device *dev = qc->dev;
1195 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1197 if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 ||
1198 scsicmd[0] == WRITE_16)
1199 tf->flags |= ATA_TFLAG_WRITE;
1201 /* Calculate the SCSI LBA, transfer length and FUA. */
1202 switch (scsicmd[0]) {
1205 scsi_10_lba_len(scsicmd, &block, &n_block);
1206 if (unlikely(scsicmd[1] & (1 << 3)))
1207 tf->flags |= ATA_TFLAG_FUA;
1211 scsi_6_lba_len(scsicmd, &block, &n_block);
1213 /* for 6-byte r/w commands, transfer length 0
1214 * means 256 blocks of data, not 0 block.
1221 scsi_16_lba_len(scsicmd, &block, &n_block);
1222 if (unlikely(scsicmd[1] & (1 << 3)))
1223 tf->flags |= ATA_TFLAG_FUA;
1226 DPRINTK("no-byte command\n");
1230 /* Check and compose ATA command */
1232 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1233 * length 0 means transfer 0 block of data.
1234 * However, for ATA R/W commands, sector count 0 means
1235 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1237 * WARNING: one or two older ATA drives treat 0 as 0...
1241 if (dev->flags & ATA_DFLAG_LBA) {
1242 tf->flags |= ATA_TFLAG_LBA;
1244 if (lba_28_ok(block, n_block)) {
1246 tf->device |= (block >> 24) & 0xf;
1247 } else if (lba_48_ok(block, n_block)) {
1248 if (!(dev->flags & ATA_DFLAG_LBA48))
1252 tf->flags |= ATA_TFLAG_LBA48;
1254 tf->hob_nsect = (n_block >> 8) & 0xff;
1256 tf->hob_lbah = (block >> 40) & 0xff;
1257 tf->hob_lbam = (block >> 32) & 0xff;
1258 tf->hob_lbal = (block >> 24) & 0xff;
1260 /* request too large even for LBA48 */
1263 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1266 qc->nsect = n_block;
1267 tf->nsect = n_block & 0xff;
1269 tf->lbah = (block >> 16) & 0xff;
1270 tf->lbam = (block >> 8) & 0xff;
1271 tf->lbal = block & 0xff;
1273 tf->device |= ATA_LBA;
1276 u32 sect, head, cyl, track;
1278 /* The request -may- be too large for CHS addressing. */
1279 if (!lba_28_ok(block, n_block))
1282 if (unlikely(ata_rwcmd_protocol(qc) < 0))
1285 /* Convert LBA to CHS */
1286 track = (u32)block / dev->sectors;
1287 cyl = track / dev->heads;
1288 head = track % dev->heads;
1289 sect = (u32)block % dev->sectors + 1;
1291 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1292 (u32)block, track, cyl, head, sect);
1294 /* Check whether the converted CHS can fit.
1298 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1301 qc->nsect = n_block;
1302 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1305 tf->lbah = cyl >> 8;
1312 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x0);
1313 /* "Invalid field in cbd" */
1317 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x21, 0x0);
1318 /* "Logical Block Address out of range" */
1322 qc->scsicmd->result = SAM_STAT_GOOD;
1326 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1328 struct scsi_cmnd *cmd = qc->scsicmd;
1329 u8 *cdb = cmd->cmnd;
1330 int need_sense = (qc->err_mask != 0);
1332 /* For ATA pass thru (SAT) commands, generate a sense block if
1333 * user mandated it or if there's an error. Note that if we
1334 * generate because the user forced us to, a check condition
1335 * is generated and the ATA register values are returned
1336 * whether the command completed successfully or not. If there
1337 * was no error, SK, ASC and ASCQ will all be zero.
1339 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1340 ((cdb[2] & 0x20) || need_sense)) {
1341 ata_gen_ata_desc_sense(qc);
1344 cmd->result = SAM_STAT_GOOD;
1346 /* TODO: decide which descriptor format to use
1347 * for 48b LBA devices and call that here
1348 * instead of the fixed desc, which is only
1349 * good for smaller LBA (and maybe CHS?)
1352 ata_gen_fixed_sense(qc);
1357 /* The ata_gen_..._sense routines fill in tf */
1358 ata_dump_status(qc->ap->id, &qc->tf);
1367 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1368 * @ap: ATA port to which the command is addressed
1369 * @dev: ATA device to which the command is addressed
1370 * @cmd: SCSI command to execute
1371 * @done: SCSI command completion function
1372 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1374 * Our ->queuecommand() function has decided that the SCSI
1375 * command issued can be directly translated into an ATA
1376 * command, rather than handled internally.
1378 * This function sets up an ata_queued_cmd structure for the
1379 * SCSI command, and sends that ata_queued_cmd to the hardware.
1381 * The xlat_func argument (actor) returns 0 if ready to execute
1382 * ATA command, else 1 to finish translation. If 1 is returned
1383 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1384 * to be set reflecting an error condition or clean (early)
1388 * spin_lock_irqsave(host_set lock)
1391 static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev,
1392 struct scsi_cmnd *cmd,
1393 void (*done)(struct scsi_cmnd *),
1394 ata_xlat_func_t xlat_func)
1396 struct ata_queued_cmd *qc;
1397 u8 *scsicmd = cmd->cmnd;
1401 qc = ata_scsi_qc_new(ap, dev, cmd, done);
1405 /* data is present; dma-map it */
1406 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1407 cmd->sc_data_direction == DMA_TO_DEVICE) {
1408 if (unlikely(cmd->request_bufflen < 1)) {
1409 printk(KERN_WARNING "ata%u(%u): WARNING: zero len r/w req\n",
1410 ap->id, dev->devno);
1415 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
1417 ata_sg_init_one(qc, cmd->request_buffer,
1418 cmd->request_bufflen);
1420 qc->dma_dir = cmd->sc_data_direction;
1423 qc->complete_fn = ata_scsi_qc_complete;
1425 if (xlat_func(qc, scsicmd))
1428 /* select device, send command to hardware */
1437 DPRINTK("EXIT - early finish (good or error)\n");
1443 cmd->result = (DID_ERROR << 16);
1445 DPRINTK("EXIT - internal\n");
1450 * ata_scsi_rbuf_get - Map response buffer.
1451 * @cmd: SCSI command containing buffer to be mapped.
1452 * @buf_out: Pointer to mapped area.
1454 * Maps buffer contained within SCSI command @cmd.
1457 * spin_lock_irqsave(host_set lock)
1460 * Length of response buffer.
1463 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1466 unsigned int buflen;
1469 struct scatterlist *sg;
1471 sg = (struct scatterlist *) cmd->request_buffer;
1472 buf = kmap_atomic(sg->page, KM_USER0) + sg->offset;
1473 buflen = sg->length;
1475 buf = cmd->request_buffer;
1476 buflen = cmd->request_bufflen;
1484 * ata_scsi_rbuf_put - Unmap response buffer.
1485 * @cmd: SCSI command containing buffer to be unmapped.
1486 * @buf: buffer to unmap
1488 * Unmaps response buffer contained within @cmd.
1491 * spin_lock_irqsave(host_set lock)
1494 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1497 struct scatterlist *sg;
1499 sg = (struct scatterlist *) cmd->request_buffer;
1500 kunmap_atomic(buf - sg->offset, KM_USER0);
1505 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1506 * @args: device IDENTIFY data / SCSI command of interest.
1507 * @actor: Callback hook for desired SCSI command simulator
1509 * Takes care of the hard work of simulating a SCSI command...
1510 * Mapping the response buffer, calling the command's handler,
1511 * and handling the handler's return value. This return value
1512 * indicates whether the handler wishes the SCSI command to be
1513 * completed successfully (0), or not (in which case cmd->result
1514 * and sense buffer are assumed to be set).
1517 * spin_lock_irqsave(host_set lock)
1520 void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1521 unsigned int (*actor) (struct ata_scsi_args *args,
1522 u8 *rbuf, unsigned int buflen))
1525 unsigned int buflen, rc;
1526 struct scsi_cmnd *cmd = args->cmd;
1528 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1529 memset(rbuf, 0, buflen);
1530 rc = actor(args, rbuf, buflen);
1531 ata_scsi_rbuf_put(cmd, rbuf);
1534 cmd->result = SAM_STAT_GOOD;
1539 * ata_scsiop_inq_std - Simulate INQUIRY command
1540 * @args: device IDENTIFY data / SCSI command of interest.
1541 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1542 * @buflen: Response buffer length.
1544 * Returns standard device identification data associated
1545 * with non-VPD INQUIRY command output.
1548 * spin_lock_irqsave(host_set lock)
1551 unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1552 unsigned int buflen)
1557 0x5, /* claim SPC-3 version compatibility */
1562 /* set scsi removeable (RMB) bit per ata bit */
1563 if (ata_id_removeable(args->id))
1568 memcpy(rbuf, hdr, sizeof(hdr));
1571 memcpy(&rbuf[8], "ATA ", 8);
1572 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16);
1573 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4);
1574 if (rbuf[32] == 0 || rbuf[32] == ' ')
1575 memcpy(&rbuf[32], "n/a ", 4);
1579 const u8 versions[] = {
1580 0x60, /* SAM-3 (no version claimed) */
1583 0x20, /* SBC-2 (no version claimed) */
1586 0x60 /* SPC-3 (no version claimed) */
1589 memcpy(rbuf + 59, versions, sizeof(versions));
1596 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1597 * @args: device IDENTIFY data / SCSI command of interest.
1598 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1599 * @buflen: Response buffer length.
1601 * Returns list of inquiry VPD pages available.
1604 * spin_lock_irqsave(host_set lock)
1607 unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1608 unsigned int buflen)
1610 const u8 pages[] = {
1611 0x00, /* page 0x00, this page */
1612 0x80, /* page 0x80, unit serial no page */
1613 0x83 /* page 0x83, device ident page */
1615 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1618 memcpy(rbuf + 4, pages, sizeof(pages));
1624 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1625 * @args: device IDENTIFY data / SCSI command of interest.
1626 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1627 * @buflen: Response buffer length.
1629 * Returns ATA device serial number.
1632 * spin_lock_irqsave(host_set lock)
1635 unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1636 unsigned int buflen)
1640 0x80, /* this page code */
1642 ATA_SERNO_LEN, /* page len */
1644 memcpy(rbuf, hdr, sizeof(hdr));
1646 if (buflen > (ATA_SERNO_LEN + 4 - 1))
1647 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1648 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1654 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1655 * @args: device IDENTIFY data / SCSI command of interest.
1656 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1657 * @buflen: Response buffer length.
1659 * Yields two logical unit device identification designators:
1660 * - vendor specific ASCII containing the ATA serial number
1661 * - SAT defined "t10 vendor id based" containing ASCII vendor
1662 * name ("ATA "), model and serial numbers.
1665 * spin_lock_irqsave(host_set lock)
1668 unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1669 unsigned int buflen)
1672 const int sat_model_serial_desc_len = 68;
1673 const int ata_model_byte_len = 40;
1675 rbuf[1] = 0x83; /* this page code */
1678 if (buflen > (ATA_SERNO_LEN + num + 3)) {
1679 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1681 rbuf[num + 3] = ATA_SERNO_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 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1688 /* SAT defined lu model and serial numbers descriptor */
1689 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1692 rbuf[num + 3] = sat_model_serial_desc_len;
1694 memcpy(rbuf + num, "ATA ", 8);
1696 ata_id_string(args->id, (unsigned char *) rbuf + num,
1697 ATA_ID_PROD_OFS, ata_model_byte_len);
1698 num += ata_model_byte_len;
1699 ata_id_string(args->id, (unsigned char *) rbuf + num,
1700 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1701 num += ATA_SERNO_LEN;
1703 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1708 * ata_scsiop_noop - Command handler that simply returns success.
1709 * @args: device IDENTIFY data / SCSI command of interest.
1710 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1711 * @buflen: Response buffer length.
1713 * No operation. Simply returns success to caller, to indicate
1714 * that the caller should successfully complete this SCSI command.
1717 * spin_lock_irqsave(host_set lock)
1720 unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1721 unsigned int buflen)
1728 * ata_msense_push - Push data onto MODE SENSE data output buffer
1729 * @ptr_io: (input/output) Location to store more output data
1730 * @last: End of output data buffer
1731 * @buf: Pointer to BLOB being added to output buffer
1732 * @buflen: Length of BLOB
1734 * Store MODE SENSE data on an output buffer.
1740 static void ata_msense_push(u8 **ptr_io, const u8 *last,
1741 const u8 *buf, unsigned int buflen)
1745 if ((ptr + buflen - 1) > last)
1748 memcpy(ptr, buf, buflen);
1756 * ata_msense_caching - Simulate MODE SENSE caching info page
1757 * @id: device IDENTIFY data
1758 * @ptr_io: (input/output) Location to store more output data
1759 * @last: End of output data buffer
1761 * Generate a caching info page, which conditionally indicates
1762 * write caching to the SCSI layer, depending on device
1769 static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1772 u8 page[CACHE_MPAGE_LEN];
1774 memcpy(page, def_cache_mpage, sizeof(page));
1775 if (ata_id_wcache_enabled(id))
1776 page[2] |= (1 << 2); /* write cache enable */
1777 if (!ata_id_rahead_enabled(id))
1778 page[12] |= (1 << 5); /* disable read ahead */
1780 ata_msense_push(ptr_io, last, page, sizeof(page));
1781 return sizeof(page);
1785 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1786 * @dev: Device associated with this MODE SENSE command
1787 * @ptr_io: (input/output) Location to store more output data
1788 * @last: End of output data buffer
1790 * Generate a generic MODE SENSE control mode page.
1796 static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1798 ata_msense_push(ptr_io, last, def_control_mpage,
1799 sizeof(def_control_mpage));
1800 return sizeof(def_control_mpage);
1804 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1805 * @dev: Device associated with this MODE SENSE command
1806 * @ptr_io: (input/output) Location to store more output data
1807 * @last: End of output data buffer
1809 * Generate a generic MODE SENSE r/w error recovery page.
1815 static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1818 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1819 sizeof(def_rw_recovery_mpage));
1820 return sizeof(def_rw_recovery_mpage);
1824 * We can turn this into a real blacklist if it's needed, for now just
1825 * blacklist any Maxtor BANC1G10 revision firmware
1827 static int ata_dev_supports_fua(u16 *id)
1829 unsigned char model[41], fw[9];
1833 if (!ata_id_has_fua(id))
1836 ata_id_c_string(id, model, ATA_ID_PROD_OFS, sizeof(model));
1837 ata_id_c_string(id, fw, ATA_ID_FW_REV_OFS, sizeof(fw));
1839 if (strcmp(model, "Maxtor"))
1841 if (strcmp(fw, "BANC1G10"))
1844 return 0; /* blacklisted */
1848 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1849 * @args: device IDENTIFY data / SCSI command of interest.
1850 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1851 * @buflen: Response buffer length.
1853 * Simulate MODE SENSE commands. Assume this is invoked for direct
1854 * access devices (e.g. disks) only. There should be no block
1855 * descriptor for other device types.
1858 * spin_lock_irqsave(host_set lock)
1861 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
1862 unsigned int buflen)
1864 struct ata_device *dev = args->dev;
1865 u8 *scsicmd = args->cmd->cmnd, *p, *last;
1866 const u8 sat_blk_desc[] = {
1867 0, 0, 0, 0, /* number of blocks: sat unspecified */
1869 0, 0x2, 0x0 /* block length: 512 bytes */
1872 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
1877 six_byte = (scsicmd[0] == MODE_SENSE);
1878 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
1880 * LLBA bit in msense(10) ignored (compliant)
1883 page_control = scsicmd[2] >> 6;
1884 switch (page_control) {
1885 case 0: /* current */
1886 break; /* supported */
1888 goto saving_not_supp;
1889 case 1: /* changeable */
1890 case 2: /* defaults */
1896 output_len = 4 + (ebd ? 8 : 0);
1897 alloc_len = scsicmd[4];
1899 output_len = 8 + (ebd ? 8 : 0);
1900 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
1902 minlen = (alloc_len < buflen) ? alloc_len : buflen;
1904 p = rbuf + output_len;
1905 last = rbuf + minlen - 1;
1907 pg = scsicmd[2] & 0x3f;
1910 * No mode subpages supported (yet) but asking for _all_
1911 * subpages may be valid
1913 if (spg && (spg != ALL_SUB_MPAGES))
1917 case RW_RECOVERY_MPAGE:
1918 output_len += ata_msense_rw_recovery(&p, last);
1922 output_len += ata_msense_caching(args->id, &p, last);
1925 case CONTROL_MPAGE: {
1926 output_len += ata_msense_ctl_mode(&p, last);
1931 output_len += ata_msense_rw_recovery(&p, last);
1932 output_len += ata_msense_caching(args->id, &p, last);
1933 output_len += ata_msense_ctl_mode(&p, last);
1936 default: /* invalid page code */
1944 if (ata_dev_supports_fua(args->id) && dev->flags & ATA_DFLAG_LBA48 &&
1945 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
1950 rbuf[0] = output_len;
1955 rbuf[3] = sizeof(sat_blk_desc);
1957 memcpy(rbuf + 4, sat_blk_desc,
1958 sizeof(sat_blk_desc));
1962 rbuf[0] = output_len >> 8;
1964 rbuf[1] = output_len;
1969 rbuf[7] = sizeof(sat_blk_desc);
1971 memcpy(rbuf + 8, sat_blk_desc,
1972 sizeof(sat_blk_desc));
1978 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
1979 /* "Invalid field in cbd" */
1983 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
1984 /* "Saving parameters not supported" */
1989 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
1990 * @args: device IDENTIFY data / SCSI command of interest.
1991 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1992 * @buflen: Response buffer length.
1994 * Simulate READ CAPACITY commands.
1997 * spin_lock_irqsave(host_set lock)
2000 unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2001 unsigned int buflen)
2008 if (ata_id_has_lba(args->id)) {
2009 if (ata_id_has_lba48(args->id))
2010 n_sectors = ata_id_u64(args->id, 100);
2012 n_sectors = ata_id_u32(args->id, 60);
2014 /* CHS default translation */
2015 n_sectors = args->id[1] * args->id[3] * args->id[6];
2017 if (ata_id_current_chs_valid(args->id))
2018 /* CHS current translation */
2019 n_sectors = ata_id_u32(args->id, 57);
2022 n_sectors--; /* ATA TotalUserSectors - 1 */
2024 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2025 if( n_sectors >= 0xffffffffULL )
2026 tmp = 0xffffffff ; /* Return max count on overflow */
2030 /* sector count, 32-bit */
2031 rbuf[0] = tmp >> (8 * 3);
2032 rbuf[1] = tmp >> (8 * 2);
2033 rbuf[2] = tmp >> (8 * 1);
2037 tmp = ATA_SECT_SIZE;
2042 /* sector count, 64-bit */
2043 tmp = n_sectors >> (8 * 4);
2044 rbuf[2] = tmp >> (8 * 3);
2045 rbuf[3] = tmp >> (8 * 2);
2046 rbuf[4] = tmp >> (8 * 1);
2049 rbuf[6] = tmp >> (8 * 3);
2050 rbuf[7] = tmp >> (8 * 2);
2051 rbuf[8] = tmp >> (8 * 1);
2055 tmp = ATA_SECT_SIZE;
2056 rbuf[12] = tmp >> 8;
2064 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2065 * @args: device IDENTIFY data / SCSI command of interest.
2066 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2067 * @buflen: Response buffer length.
2069 * Simulate REPORT LUNS command.
2072 * spin_lock_irqsave(host_set lock)
2075 unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2076 unsigned int buflen)
2079 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2085 * ata_scsi_set_sense - Set SCSI sense data and status
2086 * @cmd: SCSI request to be handled
2087 * @sk: SCSI-defined sense key
2088 * @asc: SCSI-defined additional sense code
2089 * @ascq: SCSI-defined additional sense code qualifier
2091 * Helper function that builds a valid fixed format, current
2092 * response code and the given sense key (sk), additional sense
2093 * code (asc) and additional sense code qualifier (ascq) with
2094 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2095 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2101 void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2103 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2105 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2106 cmd->sense_buffer[2] = sk;
2107 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2108 cmd->sense_buffer[12] = asc;
2109 cmd->sense_buffer[13] = ascq;
2113 * ata_scsi_badcmd - End a SCSI request with an error
2114 * @cmd: SCSI request to be handled
2115 * @done: SCSI command completion function
2116 * @asc: SCSI-defined additional sense code
2117 * @ascq: SCSI-defined additional sense code qualifier
2119 * Helper function that completes a SCSI command with
2120 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2121 * and the specified additional sense codes.
2124 * spin_lock_irqsave(host_set lock)
2127 void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2130 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
2135 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2137 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0))
2138 /* FIXME: not quite right; we don't want the
2139 * translation of taskfile registers into
2140 * a sense descriptors, since that's only
2141 * correct for ATA, not ATAPI
2143 ata_gen_ata_desc_sense(qc);
2145 qc->scsidone(qc->scsicmd);
2149 /* is it pointless to prefer PIO for "safety reasons"? */
2150 static inline int ata_pio_use_silly(struct ata_port *ap)
2152 return (ap->flags & ATA_FLAG_PIO_DMA);
2155 static void atapi_request_sense(struct ata_queued_cmd *qc)
2157 struct ata_port *ap = qc->ap;
2158 struct scsi_cmnd *cmd = qc->scsicmd;
2160 DPRINTK("ATAPI request sense\n");
2162 /* FIXME: is this needed? */
2163 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2165 ap->ops->tf_read(ap, &qc->tf);
2167 /* fill these in, for the case where they are -not- overwritten */
2168 cmd->sense_buffer[0] = 0x70;
2169 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2173 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2174 qc->dma_dir = DMA_FROM_DEVICE;
2176 memset(&qc->cdb, 0, qc->dev->cdb_len);
2177 qc->cdb[0] = REQUEST_SENSE;
2178 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2180 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2181 qc->tf.command = ATA_CMD_PACKET;
2183 if (ata_pio_use_silly(ap)) {
2184 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2185 qc->tf.feature |= ATAPI_PKT_DMA;
2187 qc->tf.protocol = ATA_PROT_ATAPI;
2188 qc->tf.lbam = (8 * 1024) & 0xff;
2189 qc->tf.lbah = (8 * 1024) >> 8;
2191 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2193 qc->complete_fn = atapi_sense_complete;
2200 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2202 struct scsi_cmnd *cmd = qc->scsicmd;
2203 unsigned int err_mask = qc->err_mask;
2205 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2207 if (unlikely(err_mask & AC_ERR_DEV)) {
2208 cmd->result = SAM_STAT_CHECK_CONDITION;
2209 atapi_request_sense(qc);
2213 else if (unlikely(err_mask))
2214 /* FIXME: not quite right; we don't want the
2215 * translation of taskfile registers into
2216 * a sense descriptors, since that's only
2217 * correct for ATA, not ATAPI
2219 ata_gen_ata_desc_sense(qc);
2222 u8 *scsicmd = cmd->cmnd;
2224 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2226 unsigned int buflen;
2228 buflen = ata_scsi_rbuf_get(cmd, &buf);
2230 /* ATAPI devices typically report zero for their SCSI version,
2231 * and sometimes deviate from the spec WRT response data
2232 * format. If SCSI version is reported as zero like normal,
2233 * then we make the following fixups: 1) Fake MMC-5 version,
2234 * to indicate to the Linux scsi midlayer this is a modern
2235 * device. 2) Ensure response data format / ATAPI information
2236 * are always correct.
2243 ata_scsi_rbuf_put(cmd, buf);
2246 cmd->result = SAM_STAT_GOOD;
2253 * atapi_xlat - Initialize PACKET taskfile
2254 * @qc: command structure to be initialized
2255 * @scsicmd: SCSI CDB associated with this PACKET command
2258 * spin_lock_irqsave(host_set lock)
2261 * Zero on success, non-zero on failure.
2264 static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd)
2266 struct scsi_cmnd *cmd = qc->scsicmd;
2267 struct ata_device *dev = qc->dev;
2268 int using_pio = (dev->flags & ATA_DFLAG_PIO);
2269 int nodata = (cmd->sc_data_direction == DMA_NONE);
2272 /* Check whether ATAPI DMA is safe */
2273 if (ata_check_atapi_dma(qc))
2276 memcpy(&qc->cdb, scsicmd, dev->cdb_len);
2278 qc->complete_fn = atapi_qc_complete;
2280 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2281 if (cmd->sc_data_direction == DMA_TO_DEVICE) {
2282 qc->tf.flags |= ATA_TFLAG_WRITE;
2283 DPRINTK("direction: write\n");
2286 qc->tf.command = ATA_CMD_PACKET;
2288 /* no data, or PIO data xfer */
2289 if (using_pio || nodata) {
2291 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2293 qc->tf.protocol = ATA_PROT_ATAPI;
2294 qc->tf.lbam = (8 * 1024) & 0xff;
2295 qc->tf.lbah = (8 * 1024) >> 8;
2300 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2301 qc->tf.feature |= ATAPI_PKT_DMA;
2303 #ifdef ATAPI_ENABLE_DMADIR
2304 /* some SATA bridges need us to indicate data xfer direction */
2305 if (cmd->sc_data_direction != DMA_TO_DEVICE)
2306 qc->tf.feature |= ATAPI_DMADIR;
2310 qc->nbytes = cmd->bufflen;
2316 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2317 * @ap: ATA port to which the device is attached
2318 * @scsidev: SCSI device from which we derive the ATA device
2320 * Given various information provided in struct scsi_cmnd,
2321 * map that onto an ATA bus, and using that mapping
2322 * determine which ata_device is associated with the
2323 * SCSI command to be sent.
2326 * spin_lock_irqsave(host_set lock)
2329 * Associated ATA device, or %NULL if not found.
2332 static struct ata_device *
2333 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2335 struct ata_device *dev;
2337 /* skip commands not addressed to targets we simulate */
2338 if (likely(scsidev->id < ATA_MAX_DEVICES))
2339 dev = &ap->device[scsidev->id];
2343 if (unlikely((scsidev->channel != 0) ||
2344 (scsidev->lun != 0)))
2347 if (unlikely(!ata_dev_present(dev)))
2350 if (!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) {
2351 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2352 printk(KERN_WARNING "ata%u(%u): WARNING: ATAPI is %s, device ignored.\n",
2353 ap->id, dev->devno, atapi_enabled ? "not supported with this driver" : "disabled");
2362 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2363 * @byte1: Byte 1 from pass-thru CDB.
2366 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2369 ata_scsi_map_proto(u8 byte1)
2371 switch((byte1 & 0x1e) >> 1) {
2372 case 3: /* Non-data */
2373 return ATA_PROT_NODATA;
2376 return ATA_PROT_DMA;
2378 case 4: /* PIO Data-in */
2379 case 5: /* PIO Data-out */
2380 return ATA_PROT_PIO;
2382 case 10: /* Device Reset */
2383 case 0: /* Hard Reset */
2385 case 2: /* Bus Idle */
2386 case 7: /* Packet */
2387 case 8: /* DMA Queued */
2388 case 9: /* Device Diagnostic */
2389 case 11: /* UDMA Data-in */
2390 case 12: /* UDMA Data-Out */
2391 case 13: /* FPDMA */
2392 default: /* Reserved */
2396 return ATA_PROT_UNKNOWN;
2400 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2401 * @qc: command structure to be initialized
2402 * @scsicmd: SCSI command to convert
2404 * Handles either 12 or 16-byte versions of the CDB.
2407 * Zero on success, non-zero on failure.
2410 ata_scsi_pass_thru(struct ata_queued_cmd *qc, const u8 *scsicmd)
2412 struct ata_taskfile *tf = &(qc->tf);
2413 struct scsi_cmnd *cmd = qc->scsicmd;
2415 if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN)
2418 if (scsicmd[1] & 0xe0)
2419 /* PIO multi not supported yet */
2423 * 12 and 16 byte CDBs use different offsets to
2424 * provide the various register values.
2426 if (scsicmd[0] == ATA_16) {
2428 * 16-byte CDB - may contain extended commands.
2430 * If that is the case, copy the upper byte register values.
2432 if (scsicmd[1] & 0x01) {
2433 tf->hob_feature = scsicmd[3];
2434 tf->hob_nsect = scsicmd[5];
2435 tf->hob_lbal = scsicmd[7];
2436 tf->hob_lbam = scsicmd[9];
2437 tf->hob_lbah = scsicmd[11];
2438 tf->flags |= ATA_TFLAG_LBA48;
2440 tf->flags &= ~ATA_TFLAG_LBA48;
2443 * Always copy low byte, device and command registers.
2445 tf->feature = scsicmd[4];
2446 tf->nsect = scsicmd[6];
2447 tf->lbal = scsicmd[8];
2448 tf->lbam = scsicmd[10];
2449 tf->lbah = scsicmd[12];
2450 tf->device = scsicmd[13];
2451 tf->command = scsicmd[14];
2454 * 12-byte CDB - incapable of extended commands.
2456 tf->flags &= ~ATA_TFLAG_LBA48;
2458 tf->feature = scsicmd[3];
2459 tf->nsect = scsicmd[4];
2460 tf->lbal = scsicmd[5];
2461 tf->lbam = scsicmd[6];
2462 tf->lbah = scsicmd[7];
2463 tf->device = scsicmd[8];
2464 tf->command = scsicmd[9];
2467 * If slave is possible, enforce correct master/slave bit
2469 if (qc->ap->flags & ATA_FLAG_SLAVE_POSS)
2470 tf->device = qc->dev->devno ?
2471 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2474 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2475 * SET_FEATURES - XFER MODE must be preceded/succeeded
2476 * by an update to hardware-specific registers for each
2477 * controller (i.e. the reason for ->set_piomode(),
2478 * ->set_dmamode(), and ->post_set_mode() hooks).
2480 if ((tf->command == ATA_CMD_SET_FEATURES)
2481 && (tf->feature == SETFEATURES_XFER))
2485 * Set flags so that all registers will be written,
2486 * and pass on write indication (used for PIO/DMA
2489 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2491 if (cmd->sc_data_direction == DMA_TO_DEVICE)
2492 tf->flags |= ATA_TFLAG_WRITE;
2495 * Set transfer length.
2497 * TODO: find out if we need to do more here to
2498 * cover scatter/gather case.
2500 qc->nsect = cmd->bufflen / ATA_SECT_SIZE;
2505 ata_scsi_set_sense(qc->scsicmd, ILLEGAL_REQUEST, 0x24, 0x00);
2506 /* "Invalid field in cdb" */
2511 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2513 * @cmd: SCSI command opcode to consider
2515 * Look up the SCSI command given, and determine whether the
2516 * SCSI command is to be translated or simulated.
2519 * Pointer to translation function if possible, %NULL if not.
2522 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2532 return ata_scsi_rw_xlat;
2534 case SYNCHRONIZE_CACHE:
2535 if (ata_try_flush_cache(dev))
2536 return ata_scsi_flush_xlat;
2541 return ata_scsi_verify_xlat;
2545 return ata_scsi_pass_thru;
2548 return ata_scsi_start_stop_xlat;
2555 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2556 * @ap: ATA port to which the command was being sent
2557 * @cmd: SCSI command to dump
2559 * Prints the contents of a SCSI command via printk().
2562 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2563 struct scsi_cmnd *cmd)
2566 struct scsi_device *scsidev = cmd->device;
2567 u8 *scsicmd = cmd->cmnd;
2569 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2571 scsidev->channel, scsidev->id, scsidev->lun,
2572 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2573 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2578 static inline void __ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
2579 struct ata_port *ap, struct ata_device *dev)
2581 if (dev->class == ATA_DEV_ATA) {
2582 ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
2586 ata_scsi_translate(ap, dev, cmd, done, xlat_func);
2588 ata_scsi_simulate(ap, dev, cmd, done);
2590 ata_scsi_translate(ap, dev, cmd, done, atapi_xlat);
2594 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2595 * @cmd: SCSI command to be sent
2596 * @done: Completion function, called when command is complete
2598 * In some cases, this function translates SCSI commands into
2599 * ATA taskfiles, and queues the taskfiles to be sent to
2600 * hardware. In other cases, this function simulates a
2601 * SCSI device by evaluating and responding to certain
2602 * SCSI commands. This creates the overall effect of
2603 * ATA and ATAPI devices appearing as SCSI devices.
2606 * Releases scsi-layer-held lock, and obtains host_set lock.
2612 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2614 struct ata_port *ap;
2615 struct ata_device *dev;
2616 struct scsi_device *scsidev = cmd->device;
2617 struct Scsi_Host *shost = scsidev->host;
2619 ap = (struct ata_port *) &shost->hostdata[0];
2621 spin_unlock(shost->host_lock);
2622 spin_lock(&ap->host_set->lock);
2624 ata_scsi_dump_cdb(ap, cmd);
2626 dev = ata_scsi_find_dev(ap, scsidev);
2628 __ata_scsi_queuecmd(cmd, done, ap, dev);
2630 cmd->result = (DID_BAD_TARGET << 16);
2634 spin_unlock(&ap->host_set->lock);
2635 spin_lock(shost->host_lock);
2640 * ata_scsi_simulate - simulate SCSI command on ATA device
2641 * @ap: port the device is connected to
2642 * @dev: the target device
2643 * @cmd: SCSI command being sent to device.
2644 * @done: SCSI command completion function.
2646 * Interprets and directly executes a select list of SCSI commands
2647 * that can be handled internally.
2650 * spin_lock_irqsave(host_set lock)
2653 void ata_scsi_simulate(struct ata_port *ap, struct ata_device *dev,
2654 struct scsi_cmnd *cmd,
2655 void (*done)(struct scsi_cmnd *))
2657 struct ata_scsi_args args;
2658 const u8 *scsicmd = cmd->cmnd;
2666 switch(scsicmd[0]) {
2667 /* no-op's, complete with success */
2668 case SYNCHRONIZE_CACHE:
2672 case TEST_UNIT_READY:
2673 case FORMAT_UNIT: /* FIXME: correct? */
2674 case SEND_DIAGNOSTIC: /* FIXME: correct? */
2675 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2679 if (scsicmd[1] & 2) /* is CmdDt set? */
2680 ata_scsi_invalid_field(cmd, done);
2681 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2682 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2683 else if (scsicmd[2] == 0x00)
2684 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2685 else if (scsicmd[2] == 0x80)
2686 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2687 else if (scsicmd[2] == 0x83)
2688 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2690 ata_scsi_invalid_field(cmd, done);
2695 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2698 case MODE_SELECT: /* unconditionally return */
2699 case MODE_SELECT_10: /* bad-field-in-cdb */
2700 ata_scsi_invalid_field(cmd, done);
2704 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2707 case SERVICE_ACTION_IN:
2708 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2709 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2711 ata_scsi_invalid_field(cmd, done);
2715 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2718 /* mandatory commands we haven't implemented yet */
2721 /* all other commands */
2723 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2724 /* "Invalid command operation code" */
2730 void ata_scsi_scan_host(struct ata_port *ap)
2732 struct ata_device *dev;
2735 if (ap->flags & ATA_FLAG_PORT_DISABLED)
2738 for (i = 0; i < ATA_MAX_DEVICES; i++) {
2739 dev = &ap->device[i];
2741 if (ata_dev_present(dev))
2742 scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0);