2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/kernel.h>
37 #include <linux/blkdev.h>
38 #include <linux/spinlock.h>
39 #include <scsi/scsi.h>
41 #include <scsi/scsi_host.h>
42 #include <linux/libata.h>
43 #include <asm/uaccess.h>
47 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, u8 *scsicmd);
48 static struct ata_device *
49 ata_scsi_find_dev(struct ata_port *ap, struct scsi_device *scsidev);
53 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
54 * @sdev: SCSI device for which BIOS geometry is to be determined
55 * @bdev: block device associated with @sdev
56 * @capacity: capacity of SCSI device
57 * @geom: location to which geometry will be output
59 * Generic bios head/sector/cylinder calculator
60 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
61 * mapping. Some situations may arise where the disk is not
62 * bootable if this is not used.
65 * Defined by the SCSI layer. We don't really care.
70 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
71 sector_t capacity, int geom[])
75 sector_div(capacity, 255*63);
81 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
84 struct ata_device *dev;
85 int val = -EINVAL, rc = -EINVAL;
87 ap = (struct ata_port *) &scsidev->host->hostdata[0];
91 dev = ata_scsi_find_dev(ap, scsidev);
98 case ATA_IOC_GET_IO32:
100 if (copy_to_user(arg, &val, 1))
104 case ATA_IOC_SET_IO32:
105 val = (unsigned long) arg;
120 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
121 * @ap: ATA port to which the new command is attached
122 * @dev: ATA device to which the new command is attached
123 * @cmd: SCSI command that originated this ATA command
124 * @done: SCSI command completion function
126 * Obtain a reference to an unused ata_queued_cmd structure,
127 * which is the basic libata structure representing a single
128 * ATA command sent to the hardware.
130 * If a command was available, fill in the SCSI-specific
131 * portions of the structure with information on the
135 * spin_lock_irqsave(host_set lock)
138 * Command allocated, or %NULL if none available.
140 struct ata_queued_cmd *ata_scsi_qc_new(struct ata_port *ap,
141 struct ata_device *dev,
142 struct scsi_cmnd *cmd,
143 void (*done)(struct scsi_cmnd *))
145 struct ata_queued_cmd *qc;
147 qc = ata_qc_new_init(ap, dev);
153 qc->sg = (struct scatterlist *) cmd->request_buffer;
154 qc->n_elem = cmd->use_sg;
160 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
168 * ata_to_sense_error - convert ATA error to SCSI error
169 * @qc: Command that we are erroring out
170 * @drv_stat: value contained in ATA status register
172 * Converts an ATA error into a SCSI error. While we are at it
173 * we decode and dump the ATA error for the user so that they
174 * have some idea what really happened at the non make-believe
178 * spin_lock_irqsave(host_set lock)
181 void ata_to_sense_error(struct ata_queued_cmd *qc, u8 drv_stat)
183 struct scsi_cmnd *cmd = qc->scsicmd;
185 unsigned char *sb = cmd->sense_buffer;
186 /* Based on the 3ware driver translation table */
187 static unsigned char sense_table[][4] = {
189 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
191 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
193 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
194 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
195 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
196 /* MC|ID|ABRT|TRK0|MARK */
197 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
199 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
200 /* Bad address mark */
201 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
203 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
205 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
206 /* Media change request */
207 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
209 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
211 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
213 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
214 /* BBD - block marked bad */
215 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
216 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
218 static unsigned char stat_table[][4] = {
219 /* Must be first because BUSY means no other bits valid */
220 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
221 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
222 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
223 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
224 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
228 cmd->result = SAM_STAT_CHECK_CONDITION;
231 * Is this an error we can process/parse
234 if(drv_stat & ATA_ERR)
235 /* Read the err bits */
236 err = ata_chk_err(qc->ap);
238 /* Display the ATA level error info */
240 printk(KERN_WARNING "ata%u: status=0x%02x { ", qc->ap->id, drv_stat);
244 err = 0; /* Data is not valid in this case */
247 if(drv_stat & 0x40) printk("DriveReady ");
248 if(drv_stat & 0x20) printk("DeviceFault ");
249 if(drv_stat & 0x10) printk("SeekComplete ");
250 if(drv_stat & 0x08) printk("DataRequest ");
251 if(drv_stat & 0x04) printk("CorrectedError ");
252 if(drv_stat & 0x02) printk("Index ");
253 if(drv_stat & 0x01) printk("Error ");
259 printk(KERN_WARNING "ata%u: error=0x%02x { ", qc->ap->id, err);
260 if(err & 0x04) printk("DriveStatusError ");
268 if(err & 0x40) printk("UncorrectableError ");
269 if(err & 0x10) printk("SectorIdNotFound ");
270 if(err & 0x02) printk("TrackZeroNotFound ");
271 if(err & 0x01) printk("AddrMarkNotFound ");
274 /* Should we dump sector info here too ?? */
279 while(sense_table[i][0] != 0xFF)
281 /* Look for best matches first */
282 if((sense_table[i][0] & err) == sense_table[i][0])
285 sb[2] = sense_table[i][1];
287 sb[12] = sense_table[i][2];
288 sb[13] = sense_table[i][3];
293 /* No immediate match */
295 printk(KERN_DEBUG "ata%u: no sense translation for 0x%02x\n", qc->ap->id, err);
298 /* Fall back to interpreting status bits */
299 while(stat_table[i][0] != 0xFF)
301 if(stat_table[i][0] & drv_stat)
304 sb[2] = stat_table[i][1];
306 sb[12] = stat_table[i][2];
307 sb[13] = stat_table[i][3];
313 printk(KERN_ERR "ata%u: called with no error (%02X)!\n", qc->ap->id, drv_stat);
314 /* additional-sense-code[-qualifier] */
317 sb[2] = MEDIUM_ERROR;
319 if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
320 sb[12] = 0x11; /* "unrecovered read error" */
323 sb[12] = 0x0C; /* "write error - */
324 sb[13] = 0x02; /* auto-reallocation failed" */
329 * ata_scsi_slave_config - Set SCSI device attributes
330 * @sdev: SCSI device to examine
332 * This is called before we actually start reading
333 * and writing to the device, to configure certain
334 * SCSI mid-layer behaviors.
337 * Defined by SCSI layer. We don't really care.
340 int ata_scsi_slave_config(struct scsi_device *sdev)
342 sdev->use_10_for_rw = 1;
343 sdev->use_10_for_ms = 1;
345 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
347 if (sdev->id < ATA_MAX_DEVICES) {
349 struct ata_device *dev;
351 ap = (struct ata_port *) &sdev->host->hostdata[0];
352 dev = &ap->device[sdev->id];
354 /* TODO: 1024 is an arbitrary number, not the
355 * hardware maximum. This should be increased to
356 * 65534 when Jens Axboe's patch for dynamically
357 * determining max_sectors is merged.
359 if ((dev->flags & ATA_DFLAG_LBA48) &&
360 ((dev->flags & ATA_DFLAG_LOCK_SECTORS) == 0)) {
362 * do not overwrite sdev->host->max_sectors, since
363 * other drives on this host may not support LBA48
365 blk_queue_max_sectors(sdev->request_queue, 2048);
369 return 0; /* scsi layer doesn't check return value, sigh */
373 * ata_scsi_error - SCSI layer error handler callback
374 * @host: SCSI host on which error occurred
376 * Handles SCSI-layer-thrown error events.
379 * Inherited from SCSI layer (none, can sleep)
385 int ata_scsi_error(struct Scsi_Host *host)
391 ap = (struct ata_port *) &host->hostdata[0];
392 ap->ops->eng_timeout(ap);
394 /* TODO: this is per-command; when queueing is supported
395 * this code will either change or move to a more
399 INIT_LIST_HEAD(&host->eh_cmd_q);
406 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
407 * @qc: Storage for translated ATA taskfile
408 * @scsicmd: SCSI command to translate
410 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
411 * (to start). Perhaps these commands should be preceded by
412 * CHECK POWER MODE to see what power mode the device is already in.
413 * [See SAT revision 5 at www.t10.org]
416 * spin_lock_irqsave(host_set lock)
419 * Zero on success, non-zero on error.
422 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc,
425 struct ata_taskfile *tf = &qc->tf;
427 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
428 tf->protocol = ATA_PROT_NODATA;
429 if (scsicmd[1] & 0x1) {
430 ; /* ignore IMMED bit, violates sat-r05 */
432 if (scsicmd[4] & 0x2)
433 return 1; /* LOEJ bit set not supported */
434 if (((scsicmd[4] >> 4) & 0xf) != 0)
435 return 1; /* power conditions not supported */
436 if (scsicmd[4] & 0x1) {
437 tf->nsect = 1; /* 1 sector, lba=0 */
439 if (qc->dev->flags & ATA_DFLAG_LBA) {
440 qc->tf.flags |= ATA_TFLAG_LBA;
445 tf->device |= ATA_LBA;
448 tf->lbal = 0x1; /* sect */
449 tf->lbam = 0x0; /* cyl low */
450 tf->lbah = 0x0; /* cyl high */
453 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
455 tf->nsect = 0; /* time period value (0 implies now) */
456 tf->command = ATA_CMD_STANDBY;
457 /* Consider: ATA STANDBY IMMEDIATE command */
460 * Standby and Idle condition timers could be implemented but that
461 * would require libata to implement the Power condition mode page
462 * and allow the user to change it. Changing mode pages requires
463 * MODE SELECT to be implemented.
471 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
472 * @qc: Storage for translated ATA taskfile
473 * @scsicmd: SCSI command to translate (ignored)
475 * Sets up an ATA taskfile to issue FLUSH CACHE or
479 * spin_lock_irqsave(host_set lock)
482 * Zero on success, non-zero on error.
485 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc, u8 *scsicmd)
487 struct ata_taskfile *tf = &qc->tf;
489 tf->flags |= ATA_TFLAG_DEVICE;
490 tf->protocol = ATA_PROT_NODATA;
492 if ((tf->flags & ATA_TFLAG_LBA48) &&
493 (ata_id_has_flush_ext(qc->dev->id)))
494 tf->command = ATA_CMD_FLUSH_EXT;
496 tf->command = ATA_CMD_FLUSH;
502 * scsi_6_lba_len - Get LBA and transfer length
503 * @scsicmd: SCSI command to translate
505 * Calculate LBA and transfer length for 6-byte commands.
509 * @plen: the transfer length
512 static void scsi_6_lba_len(u8 *scsicmd, u64 *plba, u32 *plen)
517 VPRINTK("six-byte command\n");
519 lba |= ((u64)scsicmd[2]) << 8;
520 lba |= ((u64)scsicmd[3]);
522 len |= ((u32)scsicmd[4]);
529 * scsi_10_lba_len - Get LBA and transfer length
530 * @scsicmd: SCSI command to translate
532 * Calculate LBA and transfer length for 10-byte commands.
536 * @plen: the transfer length
539 static void scsi_10_lba_len(u8 *scsicmd, u64 *plba, u32 *plen)
544 VPRINTK("ten-byte command\n");
546 lba |= ((u64)scsicmd[2]) << 24;
547 lba |= ((u64)scsicmd[3]) << 16;
548 lba |= ((u64)scsicmd[4]) << 8;
549 lba |= ((u64)scsicmd[5]);
551 len |= ((u32)scsicmd[7]) << 8;
552 len |= ((u32)scsicmd[8]);
559 * scsi_16_lba_len - Get LBA and transfer length
560 * @scsicmd: SCSI command to translate
562 * Calculate LBA and transfer length for 16-byte commands.
566 * @plen: the transfer length
569 static void scsi_16_lba_len(u8 *scsicmd, u64 *plba, u32 *plen)
574 VPRINTK("sixteen-byte command\n");
576 lba |= ((u64)scsicmd[2]) << 56;
577 lba |= ((u64)scsicmd[3]) << 48;
578 lba |= ((u64)scsicmd[4]) << 40;
579 lba |= ((u64)scsicmd[5]) << 32;
580 lba |= ((u64)scsicmd[6]) << 24;
581 lba |= ((u64)scsicmd[7]) << 16;
582 lba |= ((u64)scsicmd[8]) << 8;
583 lba |= ((u64)scsicmd[9]);
585 len |= ((u32)scsicmd[10]) << 24;
586 len |= ((u32)scsicmd[11]) << 16;
587 len |= ((u32)scsicmd[12]) << 8;
588 len |= ((u32)scsicmd[13]);
595 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
596 * @qc: Storage for translated ATA taskfile
597 * @scsicmd: SCSI command to translate
599 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
602 * spin_lock_irqsave(host_set lock)
605 * Zero on success, non-zero on error.
608 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc, u8 *scsicmd)
610 struct ata_taskfile *tf = &qc->tf;
611 struct ata_device *dev = qc->dev;
612 unsigned int lba = tf->flags & ATA_TFLAG_LBA;
613 unsigned int lba48 = tf->flags & ATA_TFLAG_LBA48;
614 u64 dev_sectors = qc->dev->n_sectors;
618 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
619 tf->protocol = ATA_PROT_NODATA;
621 if (scsicmd[0] == VERIFY)
622 scsi_10_lba_len(scsicmd, &block, &n_block);
623 else if (scsicmd[0] == VERIFY_16)
624 scsi_16_lba_len(scsicmd, &block, &n_block);
630 if (block >= dev_sectors)
632 if ((block + n_block) > dev_sectors)
635 if (n_block > (64 * 1024))
644 tf->command = ATA_CMD_VERIFY_EXT;
646 tf->hob_nsect = (n_block >> 8) & 0xff;
648 tf->hob_lbah = (block >> 40) & 0xff;
649 tf->hob_lbam = (block >> 32) & 0xff;
650 tf->hob_lbal = (block >> 24) & 0xff;
652 tf->command = ATA_CMD_VERIFY;
654 tf->device |= (block >> 24) & 0xf;
657 tf->nsect = n_block & 0xff;
659 tf->lbah = (block >> 16) & 0xff;
660 tf->lbam = (block >> 8) & 0xff;
661 tf->lbal = block & 0xff;
663 tf->device |= ATA_LBA;
666 u32 sect, head, cyl, track;
668 /* Convert LBA to CHS */
669 track = (u32)block / dev->sectors;
670 cyl = track / dev->heads;
671 head = track % dev->heads;
672 sect = (u32)block % dev->sectors + 1;
674 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
675 (u32)block, track, cyl, head, sect);
677 /* Check whether the converted CHS can fit.
681 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
684 tf->command = ATA_CMD_VERIFY;
685 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
696 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
697 * @qc: Storage for translated ATA taskfile
698 * @scsicmd: SCSI command to translate
700 * Converts any of six SCSI read/write commands into the
701 * ATA counterpart, including starting sector (LBA),
702 * sector count, and taking into account the device's LBA48
705 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
706 * %WRITE_16 are currently supported.
709 * spin_lock_irqsave(host_set lock)
712 * Zero on success, non-zero on error.
715 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, u8 *scsicmd)
717 struct ata_taskfile *tf = &qc->tf;
718 struct ata_device *dev = qc->dev;
719 unsigned int lba = tf->flags & ATA_TFLAG_LBA;
720 unsigned int lba48 = tf->flags & ATA_TFLAG_LBA48;
724 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
725 tf->protocol = qc->dev->xfer_protocol;
727 if (scsicmd[0] == READ_10 || scsicmd[0] == READ_6 ||
728 scsicmd[0] == READ_16) {
729 tf->command = qc->dev->read_cmd;
731 tf->command = qc->dev->write_cmd;
732 tf->flags |= ATA_TFLAG_WRITE;
735 /* Calculate the SCSI LBA and transfer length. */
736 switch (scsicmd[0]) {
739 scsi_10_lba_len(scsicmd, &block, &n_block);
743 scsi_6_lba_len(scsicmd, &block, &n_block);
745 /* for 6-byte r/w commands, transfer length 0
746 * means 256 blocks of data, not 0 block.
753 scsi_16_lba_len(scsicmd, &block, &n_block);
756 DPRINTK("no-byte command\n");
760 /* Check and compose ATA command */
762 /* For 10-byte and 16-byte SCSI R/W commands, transfer
763 * length 0 means transfer 0 block of data.
764 * However, for ATA R/W commands, sector count 0 means
765 * 256 or 65536 sectors, not 0 sectors as in SCSI.
771 /* The request -may- be too large for LBA48. */
772 if ((block >> 48) || (n_block > 65536))
775 tf->hob_nsect = (n_block >> 8) & 0xff;
777 tf->hob_lbah = (block >> 40) & 0xff;
778 tf->hob_lbam = (block >> 32) & 0xff;
779 tf->hob_lbal = (block >> 24) & 0xff;
783 /* The request -may- be too large for LBA28. */
784 if ((block >> 28) || (n_block > 256))
787 tf->device |= (block >> 24) & 0xf;
791 tf->nsect = n_block & 0xff;
793 tf->lbah = (block >> 16) & 0xff;
794 tf->lbam = (block >> 8) & 0xff;
795 tf->lbal = block & 0xff;
797 tf->device |= ATA_LBA;
800 u32 sect, head, cyl, track;
802 /* The request -may- be too large for CHS addressing. */
803 if ((block >> 28) || (n_block > 256))
806 /* Convert LBA to CHS */
807 track = (u32)block / dev->sectors;
808 cyl = track / dev->heads;
809 head = track % dev->heads;
810 sect = (u32)block % dev->sectors + 1;
812 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
813 (u32)block, track, cyl, head, sect);
815 /* Check whether the converted CHS can fit.
819 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
823 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
833 static int ata_scsi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat)
835 struct scsi_cmnd *cmd = qc->scsicmd;
837 if (unlikely(drv_stat & (ATA_ERR | ATA_BUSY | ATA_DRQ)))
838 ata_to_sense_error(qc, drv_stat);
840 cmd->result = SAM_STAT_GOOD;
848 * ata_scsi_translate - Translate then issue SCSI command to ATA device
849 * @ap: ATA port to which the command is addressed
850 * @dev: ATA device to which the command is addressed
851 * @cmd: SCSI command to execute
852 * @done: SCSI command completion function
853 * @xlat_func: Actor which translates @cmd to an ATA taskfile
855 * Our ->queuecommand() function has decided that the SCSI
856 * command issued can be directly translated into an ATA
857 * command, rather than handled internally.
859 * This function sets up an ata_queued_cmd structure for the
860 * SCSI command, and sends that ata_queued_cmd to the hardware.
863 * spin_lock_irqsave(host_set lock)
866 static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev,
867 struct scsi_cmnd *cmd,
868 void (*done)(struct scsi_cmnd *),
869 ata_xlat_func_t xlat_func)
871 struct ata_queued_cmd *qc;
872 u8 *scsicmd = cmd->cmnd;
876 qc = ata_scsi_qc_new(ap, dev, cmd, done);
880 /* data is present; dma-map it */
881 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
882 cmd->sc_data_direction == DMA_TO_DEVICE) {
883 if (unlikely(cmd->request_bufflen < 1)) {
884 printk(KERN_WARNING "ata%u(%u): WARNING: zero len r/w req\n",
890 ata_sg_init(qc, cmd->request_buffer, cmd->use_sg);
892 ata_sg_init_one(qc, cmd->request_buffer,
893 cmd->request_bufflen);
895 qc->dma_dir = cmd->sc_data_direction;
898 qc->complete_fn = ata_scsi_qc_complete;
900 if (xlat_func(qc, scsicmd))
903 /* select device, send command to hardware */
904 if (ata_qc_issue(qc))
912 ata_bad_cdb(cmd, done);
913 DPRINTK("EXIT - badcmd\n");
917 * ata_scsi_rbuf_get - Map response buffer.
918 * @cmd: SCSI command containing buffer to be mapped.
919 * @buf_out: Pointer to mapped area.
921 * Maps buffer contained within SCSI command @cmd.
924 * spin_lock_irqsave(host_set lock)
927 * Length of response buffer.
930 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
936 struct scatterlist *sg;
938 sg = (struct scatterlist *) cmd->request_buffer;
939 buf = kmap_atomic(sg->page, KM_USER0) + sg->offset;
942 buf = cmd->request_buffer;
943 buflen = cmd->request_bufflen;
951 * ata_scsi_rbuf_put - Unmap response buffer.
952 * @cmd: SCSI command containing buffer to be unmapped.
953 * @buf: buffer to unmap
955 * Unmaps response buffer contained within @cmd.
958 * spin_lock_irqsave(host_set lock)
961 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
964 struct scatterlist *sg;
966 sg = (struct scatterlist *) cmd->request_buffer;
967 kunmap_atomic(buf - sg->offset, KM_USER0);
972 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
973 * @args: device IDENTIFY data / SCSI command of interest.
974 * @actor: Callback hook for desired SCSI command simulator
976 * Takes care of the hard work of simulating a SCSI command...
977 * Mapping the response buffer, calling the command's handler,
978 * and handling the handler's return value. This return value
979 * indicates whether the handler wishes the SCSI command to be
980 * completed successfully, or not.
983 * spin_lock_irqsave(host_set lock)
986 void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
987 unsigned int (*actor) (struct ata_scsi_args *args,
988 u8 *rbuf, unsigned int buflen))
991 unsigned int buflen, rc;
992 struct scsi_cmnd *cmd = args->cmd;
994 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
995 memset(rbuf, 0, buflen);
996 rc = actor(args, rbuf, buflen);
997 ata_scsi_rbuf_put(cmd, rbuf);
1000 ata_bad_cdb(cmd, args->done);
1002 cmd->result = SAM_STAT_GOOD;
1008 * ata_scsiop_inq_std - Simulate INQUIRY command
1009 * @args: device IDENTIFY data / SCSI command of interest.
1010 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1011 * @buflen: Response buffer length.
1013 * Returns standard device identification data associated
1014 * with non-EVPD INQUIRY command output.
1017 * spin_lock_irqsave(host_set lock)
1020 unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1021 unsigned int buflen)
1026 0x5, /* claim SPC-3 version compatibility */
1031 /* set scsi removeable (RMB) bit per ata bit */
1032 if (ata_id_removeable(args->id))
1037 memcpy(rbuf, hdr, sizeof(hdr));
1040 memcpy(&rbuf[8], "ATA ", 8);
1041 ata_dev_id_string(args->id, &rbuf[16], ATA_ID_PROD_OFS, 16);
1042 ata_dev_id_string(args->id, &rbuf[32], ATA_ID_FW_REV_OFS, 4);
1043 if (rbuf[32] == 0 || rbuf[32] == ' ')
1044 memcpy(&rbuf[32], "n/a ", 4);
1048 const u8 versions[] = {
1049 0x60, /* SAM-3 (no version claimed) */
1052 0x20, /* SBC-2 (no version claimed) */
1055 0x60 /* SPC-3 (no version claimed) */
1058 memcpy(rbuf + 59, versions, sizeof(versions));
1065 * ata_scsiop_inq_00 - Simulate INQUIRY EVPD page 0, list of pages
1066 * @args: device IDENTIFY data / SCSI command of interest.
1067 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1068 * @buflen: Response buffer length.
1070 * Returns list of inquiry EVPD pages available.
1073 * spin_lock_irqsave(host_set lock)
1076 unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1077 unsigned int buflen)
1079 const u8 pages[] = {
1080 0x00, /* page 0x00, this page */
1081 0x80, /* page 0x80, unit serial no page */
1082 0x83 /* page 0x83, device ident page */
1084 rbuf[3] = sizeof(pages); /* number of supported EVPD pages */
1087 memcpy(rbuf + 4, pages, sizeof(pages));
1093 * ata_scsiop_inq_80 - Simulate INQUIRY EVPD page 80, device serial number
1094 * @args: device IDENTIFY data / SCSI command of interest.
1095 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1096 * @buflen: Response buffer length.
1098 * Returns ATA device serial number.
1101 * spin_lock_irqsave(host_set lock)
1104 unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1105 unsigned int buflen)
1109 0x80, /* this page code */
1111 ATA_SERNO_LEN, /* page len */
1113 memcpy(rbuf, hdr, sizeof(hdr));
1115 if (buflen > (ATA_SERNO_LEN + 4 - 1))
1116 ata_dev_id_string(args->id, (unsigned char *) &rbuf[4],
1117 ATA_ID_SERNO_OFS, ATA_SERNO_LEN);
1122 static const char *inq_83_str = "Linux ATA-SCSI simulator";
1125 * ata_scsiop_inq_83 - Simulate INQUIRY EVPD page 83, device identity
1126 * @args: device IDENTIFY data / SCSI command of interest.
1127 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1128 * @buflen: Response buffer length.
1130 * Returns device identification. Currently hardcoded to
1131 * return "Linux ATA-SCSI simulator".
1134 * spin_lock_irqsave(host_set lock)
1137 unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1138 unsigned int buflen)
1140 rbuf[1] = 0x83; /* this page code */
1141 rbuf[3] = 4 + strlen(inq_83_str); /* page len */
1143 /* our one and only identification descriptor (vendor-specific) */
1144 if (buflen > (strlen(inq_83_str) + 4 + 4 - 1)) {
1145 rbuf[4 + 0] = 2; /* code set: ASCII */
1146 rbuf[4 + 3] = strlen(inq_83_str);
1147 memcpy(rbuf + 4 + 4, inq_83_str, strlen(inq_83_str));
1154 * ata_scsiop_noop - Command handler that simply returns success.
1155 * @args: device IDENTIFY data / SCSI command of interest.
1156 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1157 * @buflen: Response buffer length.
1159 * No operation. Simply returns success to caller, to indicate
1160 * that the caller should successfully complete this SCSI command.
1163 * spin_lock_irqsave(host_set lock)
1166 unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1167 unsigned int buflen)
1174 * ata_msense_push - Push data onto MODE SENSE data output buffer
1175 * @ptr_io: (input/output) Location to store more output data
1176 * @last: End of output data buffer
1177 * @buf: Pointer to BLOB being added to output buffer
1178 * @buflen: Length of BLOB
1180 * Store MODE SENSE data on an output buffer.
1186 static void ata_msense_push(u8 **ptr_io, const u8 *last,
1187 const u8 *buf, unsigned int buflen)
1191 if ((ptr + buflen - 1) > last)
1194 memcpy(ptr, buf, buflen);
1202 * ata_msense_caching - Simulate MODE SENSE caching info page
1203 * @id: device IDENTIFY data
1204 * @ptr_io: (input/output) Location to store more output data
1205 * @last: End of output data buffer
1207 * Generate a caching info page, which conditionally indicates
1208 * write caching to the SCSI layer, depending on device
1215 static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1219 0x8, /* page code */
1220 0x12, /* page length */
1221 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 10 zeroes */
1222 0, 0, 0, 0, 0, 0, 0, 0 /* 8 zeroes */
1225 if (ata_id_wcache_enabled(id))
1226 page[2] |= (1 << 2); /* write cache enable */
1227 if (!ata_id_rahead_enabled(id))
1228 page[12] |= (1 << 5); /* disable read ahead */
1230 ata_msense_push(ptr_io, last, page, sizeof(page));
1231 return sizeof(page);
1235 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1236 * @dev: Device associated with this MODE SENSE command
1237 * @ptr_io: (input/output) Location to store more output data
1238 * @last: End of output data buffer
1240 * Generate a generic MODE SENSE control mode page.
1246 static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1248 const u8 page[] = {0xa, 0xa, 6, 0, 0, 0, 0, 0, 0xff, 0xff, 0, 30};
1250 /* byte 2: set the descriptor format sense data bit (bit 2)
1251 * since we need to support returning this format for SAT
1252 * commands and any SCSI commands against a 48b LBA device.
1255 ata_msense_push(ptr_io, last, page, sizeof(page));
1256 return sizeof(page);
1260 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1261 * @dev: Device associated with this MODE SENSE command
1262 * @ptr_io: (input/output) Location to store more output data
1263 * @last: End of output data buffer
1265 * Generate a generic MODE SENSE r/w error recovery page.
1271 static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1274 0x1, /* page code */
1275 0xa, /* page length */
1276 (1 << 7) | (1 << 6), /* note auto r/w reallocation */
1277 0, 0, 0, 0, 0, 0, 0, 0, 0 /* 9 zeroes */
1280 ata_msense_push(ptr_io, last, page, sizeof(page));
1281 return sizeof(page);
1285 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1286 * @args: device IDENTIFY data / SCSI command of interest.
1287 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1288 * @buflen: Response buffer length.
1290 * Simulate MODE SENSE commands.
1293 * spin_lock_irqsave(host_set lock)
1296 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
1297 unsigned int buflen)
1299 u8 *scsicmd = args->cmd->cmnd, *p, *last;
1300 unsigned int page_control, six_byte, output_len;
1304 six_byte = (scsicmd[0] == MODE_SENSE);
1306 /* we only support saved and current values (which we treat
1307 * in the same manner)
1309 page_control = scsicmd[2] >> 6;
1310 if ((page_control != 0) && (page_control != 3))
1318 p = rbuf + output_len;
1319 last = rbuf + buflen - 1;
1321 switch(scsicmd[2] & 0x3f) {
1322 case 0x01: /* r/w error recovery */
1323 output_len += ata_msense_rw_recovery(&p, last);
1326 case 0x08: /* caching */
1327 output_len += ata_msense_caching(args->id, &p, last);
1330 case 0x0a: { /* control mode */
1331 output_len += ata_msense_ctl_mode(&p, last);
1335 case 0x3f: /* all pages */
1336 output_len += ata_msense_rw_recovery(&p, last);
1337 output_len += ata_msense_caching(args->id, &p, last);
1338 output_len += ata_msense_ctl_mode(&p, last);
1341 default: /* invalid page code */
1347 rbuf[0] = output_len;
1350 rbuf[0] = output_len >> 8;
1351 rbuf[1] = output_len;
1358 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
1359 * @args: device IDENTIFY data / SCSI command of interest.
1360 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1361 * @buflen: Response buffer length.
1363 * Simulate READ CAPACITY commands.
1366 * spin_lock_irqsave(host_set lock)
1369 unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
1370 unsigned int buflen)
1377 if (ata_id_has_lba(args->id)) {
1378 if (ata_id_has_lba48(args->id))
1379 n_sectors = ata_id_u64(args->id, 100);
1381 n_sectors = ata_id_u32(args->id, 60);
1383 /* CHS default translation */
1384 n_sectors = args->id[1] * args->id[3] * args->id[6];
1386 if (ata_id_current_chs_valid(args->id))
1387 /* CHS current translation */
1388 n_sectors = ata_id_u32(args->id, 57);
1391 n_sectors--; /* ATA TotalUserSectors - 1 */
1393 if (args->cmd->cmnd[0] == READ_CAPACITY) {
1394 if( n_sectors >= 0xffffffffULL )
1395 tmp = 0xffffffff ; /* Return max count on overflow */
1399 /* sector count, 32-bit */
1400 rbuf[0] = tmp >> (8 * 3);
1401 rbuf[1] = tmp >> (8 * 2);
1402 rbuf[2] = tmp >> (8 * 1);
1406 tmp = ATA_SECT_SIZE;
1411 /* sector count, 64-bit */
1412 tmp = n_sectors >> (8 * 4);
1413 rbuf[2] = tmp >> (8 * 3);
1414 rbuf[3] = tmp >> (8 * 2);
1415 rbuf[4] = tmp >> (8 * 1);
1418 rbuf[6] = tmp >> (8 * 3);
1419 rbuf[7] = tmp >> (8 * 2);
1420 rbuf[8] = tmp >> (8 * 1);
1424 tmp = ATA_SECT_SIZE;
1425 rbuf[12] = tmp >> 8;
1433 * ata_scsiop_report_luns - Simulate REPORT LUNS command
1434 * @args: device IDENTIFY data / SCSI command of interest.
1435 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1436 * @buflen: Response buffer length.
1438 * Simulate REPORT LUNS command.
1441 * spin_lock_irqsave(host_set lock)
1444 unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
1445 unsigned int buflen)
1448 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
1454 * ata_scsi_badcmd - End a SCSI request with an error
1455 * @cmd: SCSI request to be handled
1456 * @done: SCSI command completion function
1457 * @asc: SCSI-defined additional sense code
1458 * @ascq: SCSI-defined additional sense code qualifier
1460 * Helper function that completes a SCSI command with
1461 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
1462 * and the specified additional sense codes.
1465 * spin_lock_irqsave(host_set lock)
1468 void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
1471 cmd->result = SAM_STAT_CHECK_CONDITION;
1473 cmd->sense_buffer[0] = 0x70;
1474 cmd->sense_buffer[2] = ILLEGAL_REQUEST;
1475 cmd->sense_buffer[7] = 14 - 8; /* addnl. sense len. FIXME: correct? */
1476 cmd->sense_buffer[12] = asc;
1477 cmd->sense_buffer[13] = ascq;
1482 static int atapi_qc_complete(struct ata_queued_cmd *qc, u8 drv_stat)
1484 struct scsi_cmnd *cmd = qc->scsicmd;
1486 if (unlikely(drv_stat & (ATA_ERR | ATA_BUSY | ATA_DRQ))) {
1487 DPRINTK("request check condition\n");
1489 cmd->result = SAM_STAT_CHECK_CONDITION;
1495 u8 *scsicmd = cmd->cmnd;
1497 if (scsicmd[0] == INQUIRY) {
1499 unsigned int buflen;
1501 buflen = ata_scsi_rbuf_get(cmd, &buf);
1503 buf[3] = (buf[3] & 0xf0) | 2;
1504 ata_scsi_rbuf_put(cmd, buf);
1506 cmd->result = SAM_STAT_GOOD;
1514 * atapi_xlat - Initialize PACKET taskfile
1515 * @qc: command structure to be initialized
1516 * @scsicmd: SCSI CDB associated with this PACKET command
1519 * spin_lock_irqsave(host_set lock)
1522 * Zero on success, non-zero on failure.
1525 static unsigned int atapi_xlat(struct ata_queued_cmd *qc, u8 *scsicmd)
1527 struct scsi_cmnd *cmd = qc->scsicmd;
1528 struct ata_device *dev = qc->dev;
1529 int using_pio = (dev->flags & ATA_DFLAG_PIO);
1530 int nodata = (cmd->sc_data_direction == DMA_NONE);
1533 /* Check whether ATAPI DMA is safe */
1534 if (ata_check_atapi_dma(qc))
1537 memcpy(&qc->cdb, scsicmd, qc->ap->cdb_len);
1539 qc->complete_fn = atapi_qc_complete;
1541 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1542 if (cmd->sc_data_direction == DMA_TO_DEVICE) {
1543 qc->tf.flags |= ATA_TFLAG_WRITE;
1544 DPRINTK("direction: write\n");
1547 qc->tf.command = ATA_CMD_PACKET;
1549 /* no data, or PIO data xfer */
1550 if (using_pio || nodata) {
1552 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
1554 qc->tf.protocol = ATA_PROT_ATAPI;
1555 qc->tf.lbam = (8 * 1024) & 0xff;
1556 qc->tf.lbah = (8 * 1024) >> 8;
1561 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
1562 qc->tf.feature |= ATAPI_PKT_DMA;
1564 #ifdef ATAPI_ENABLE_DMADIR
1565 /* some SATA bridges need us to indicate data xfer direction */
1566 if (cmd->sc_data_direction != DMA_TO_DEVICE)
1567 qc->tf.feature |= ATAPI_DMADIR;
1571 qc->nbytes = cmd->bufflen;
1577 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
1578 * @ap: ATA port to which the device is attached
1579 * @scsidev: SCSI device from which we derive the ATA device
1581 * Given various information provided in struct scsi_cmnd,
1582 * map that onto an ATA bus, and using that mapping
1583 * determine which ata_device is associated with the
1584 * SCSI command to be sent.
1587 * spin_lock_irqsave(host_set lock)
1590 * Associated ATA device, or %NULL if not found.
1593 static struct ata_device *
1594 ata_scsi_find_dev(struct ata_port *ap, struct scsi_device *scsidev)
1596 struct ata_device *dev;
1598 /* skip commands not addressed to targets we simulate */
1599 if (likely(scsidev->id < ATA_MAX_DEVICES))
1600 dev = &ap->device[scsidev->id];
1604 if (unlikely((scsidev->channel != 0) ||
1605 (scsidev->lun != 0)))
1608 if (unlikely(!ata_dev_present(dev)))
1611 if (!atapi_enabled) {
1612 if (unlikely(dev->class == ATA_DEV_ATAPI))
1620 * ata_get_xlat_func - check if SCSI to ATA translation is possible
1622 * @cmd: SCSI command opcode to consider
1624 * Look up the SCSI command given, and determine whether the
1625 * SCSI command is to be translated or simulated.
1628 * Pointer to translation function if possible, %NULL if not.
1631 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
1641 return ata_scsi_rw_xlat;
1643 case SYNCHRONIZE_CACHE:
1644 if (ata_try_flush_cache(dev))
1645 return ata_scsi_flush_xlat;
1650 return ata_scsi_verify_xlat;
1652 return ata_scsi_start_stop_xlat;
1659 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
1660 * @ap: ATA port to which the command was being sent
1661 * @cmd: SCSI command to dump
1663 * Prints the contents of a SCSI command via printk().
1666 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
1667 struct scsi_cmnd *cmd)
1670 struct scsi_device *scsidev = cmd->device;
1671 u8 *scsicmd = cmd->cmnd;
1673 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
1675 scsidev->channel, scsidev->id, scsidev->lun,
1676 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
1677 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
1683 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
1684 * @cmd: SCSI command to be sent
1685 * @done: Completion function, called when command is complete
1687 * In some cases, this function translates SCSI commands into
1688 * ATA taskfiles, and queues the taskfiles to be sent to
1689 * hardware. In other cases, this function simulates a
1690 * SCSI device by evaluating and responding to certain
1691 * SCSI commands. This creates the overall effect of
1692 * ATA and ATAPI devices appearing as SCSI devices.
1695 * Releases scsi-layer-held lock, and obtains host_set lock.
1701 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
1703 struct ata_port *ap;
1704 struct ata_device *dev;
1705 struct scsi_device *scsidev = cmd->device;
1707 ap = (struct ata_port *) &scsidev->host->hostdata[0];
1709 ata_scsi_dump_cdb(ap, cmd);
1711 dev = ata_scsi_find_dev(ap, scsidev);
1712 if (unlikely(!dev)) {
1713 cmd->result = (DID_BAD_TARGET << 16);
1718 if (dev->class == ATA_DEV_ATA) {
1719 ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
1723 ata_scsi_translate(ap, dev, cmd, done, xlat_func);
1725 ata_scsi_simulate(dev->id, cmd, done);
1727 ata_scsi_translate(ap, dev, cmd, done, atapi_xlat);
1734 * ata_scsi_simulate - simulate SCSI command on ATA device
1735 * @id: current IDENTIFY data for target device.
1736 * @cmd: SCSI command being sent to device.
1737 * @done: SCSI command completion function.
1739 * Interprets and directly executes a select list of SCSI commands
1740 * that can be handled internally.
1743 * spin_lock_irqsave(host_set lock)
1746 void ata_scsi_simulate(u16 *id,
1747 struct scsi_cmnd *cmd,
1748 void (*done)(struct scsi_cmnd *))
1750 struct ata_scsi_args args;
1751 u8 *scsicmd = cmd->cmnd;
1757 switch(scsicmd[0]) {
1758 /* no-op's, complete with success */
1759 case SYNCHRONIZE_CACHE:
1763 case TEST_UNIT_READY:
1764 case FORMAT_UNIT: /* FIXME: correct? */
1765 case SEND_DIAGNOSTIC: /* FIXME: correct? */
1766 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
1770 if (scsicmd[1] & 2) /* is CmdDt set? */
1771 ata_bad_cdb(cmd, done);
1772 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
1773 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
1774 else if (scsicmd[2] == 0x00)
1775 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
1776 else if (scsicmd[2] == 0x80)
1777 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
1778 else if (scsicmd[2] == 0x83)
1779 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
1781 ata_bad_cdb(cmd, done);
1786 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
1789 case MODE_SELECT: /* unconditionally return */
1790 case MODE_SELECT_10: /* bad-field-in-cdb */
1791 ata_bad_cdb(cmd, done);
1795 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
1798 case SERVICE_ACTION_IN:
1799 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
1800 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
1802 ata_bad_cdb(cmd, done);
1806 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
1809 /* mandantory commands we haven't implemented yet */
1812 /* all other commands */
1814 ata_bad_scsiop(cmd, done);
1819 void ata_scsi_scan_host(struct ata_port *ap)
1821 struct ata_device *dev;
1824 if (ap->flags & ATA_FLAG_PORT_DISABLED)
1827 for (i = 0; i < ATA_MAX_DEVICES; i++) {
1828 dev = &ap->device[i];
1830 if (ata_dev_present(dev))
1831 scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0);