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_cmnd.h>
42 #include <scsi/scsi_eh.h>
43 #include <scsi/scsi_device.h>
44 #include <scsi/scsi_tcq.h>
45 #include <scsi/scsi_transport.h>
46 #include <linux/libata.h>
47 #include <linux/hdreg.h>
48 #include <asm/uaccess.h>
52 #define SECTOR_SIZE 512
54 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
56 static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
57 const struct scsi_device *scsidev);
58 static struct ata_device * ata_scsi_find_dev(struct ata_port *ap,
59 const struct scsi_device *scsidev);
60 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
61 unsigned int id, unsigned int lun);
64 #define RW_RECOVERY_MPAGE 0x1
65 #define RW_RECOVERY_MPAGE_LEN 12
66 #define CACHE_MPAGE 0x8
67 #define CACHE_MPAGE_LEN 20
68 #define CONTROL_MPAGE 0xa
69 #define CONTROL_MPAGE_LEN 12
70 #define ALL_MPAGES 0x3f
71 #define ALL_SUB_MPAGES 0xff
74 static const u8 def_rw_recovery_mpage[] = {
76 RW_RECOVERY_MPAGE_LEN - 2,
77 (1 << 7) | /* AWRE, sat-r06 say it shall be 0 */
78 (1 << 6), /* ARRE (auto read reallocation) */
79 0, /* read retry count */
81 0, /* write retry count */
85 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
88 0, /* contains WCE, needs to be 0 for logic */
89 0, 0, 0, 0, 0, 0, 0, 0, 0,
90 0, /* contains DRA, needs to be 0 for logic */
94 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
96 CONTROL_MPAGE_LEN - 2,
97 2, /* DSENSE=0, GLTSD=1 */
98 0, /* [QAM+QERR may be 1, see 05-359r1] */
99 0, 0, 0, 0, 0xff, 0xff,
100 0, 30 /* extended self test time, see 05-359r1 */
104 * libata transport template. libata doesn't do real transport stuff.
105 * It just needs the eh_timed_out hook.
107 static struct scsi_transport_template ata_scsi_transport_template = {
108 .eh_strategy_handler = ata_scsi_error,
109 .eh_timed_out = ata_scsi_timed_out,
110 .user_scan = ata_scsi_user_scan,
114 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
115 void (*done)(struct scsi_cmnd *))
117 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
118 /* "Invalid field in cbd" */
123 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
124 * @sdev: SCSI device for which BIOS geometry is to be determined
125 * @bdev: block device associated with @sdev
126 * @capacity: capacity of SCSI device
127 * @geom: location to which geometry will be output
129 * Generic bios head/sector/cylinder calculator
130 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
131 * mapping. Some situations may arise where the disk is not
132 * bootable if this is not used.
135 * Defined by the SCSI layer. We don't really care.
140 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
141 sector_t capacity, int geom[])
145 sector_div(capacity, 255*63);
152 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
153 * @sdev: SCSI device to get identify data for
154 * @arg: User buffer area for identify data
157 * Defined by the SCSI layer. We don't really care.
160 * Zero on success, negative errno on error.
162 static int ata_get_identity(struct scsi_device *sdev, void __user *arg)
164 struct ata_port *ap = ata_shost_to_port(sdev->host);
165 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
166 u16 __user *dst = arg;
172 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
175 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
176 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
179 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
180 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
183 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
184 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
191 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
192 * @scsidev: Device to which we are issuing command
193 * @arg: User provided data for issuing command
196 * Defined by the SCSI layer. We don't really care.
199 * Zero on success, negative errno on error.
201 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
204 u8 scsi_cmd[MAX_COMMAND_SIZE];
205 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
207 enum dma_data_direction data_dir;
213 if (copy_from_user(args, arg, sizeof(args)))
216 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
220 memset(scsi_cmd, 0, sizeof(scsi_cmd));
223 argsize = SECTOR_SIZE * args[3];
224 argbuf = kmalloc(argsize, GFP_KERNEL);
225 if (argbuf == NULL) {
230 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
231 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
232 block count in sector count field */
233 data_dir = DMA_FROM_DEVICE;
235 scsi_cmd[1] = (3 << 1); /* Non-data */
236 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
240 scsi_cmd[0] = ATA_16;
242 scsi_cmd[4] = args[2];
243 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
244 scsi_cmd[6] = args[3];
245 scsi_cmd[8] = args[1];
249 scsi_cmd[6] = args[1];
251 scsi_cmd[14] = args[0];
253 /* Good values for timeout and retries? Values below
254 from scsi_ioctl_send_command() for default case... */
255 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
256 sensebuf, (10*HZ), 5, 0);
258 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
259 u8 *desc = sensebuf + 8;
260 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
262 /* If we set cc then ATA pass-through will cause a
263 * check condition even if no error. Filter that. */
264 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
265 struct scsi_sense_hdr sshdr;
266 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
268 if (sshdr.sense_key==0 &&
269 sshdr.asc==0 && sshdr.ascq==0)
270 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
273 /* Send userspace a few ATA registers (same as drivers/ide) */
274 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
275 desc[0] == 0x09 ) { /* code is "ATA Descriptor" */
276 args[0] = desc[13]; /* status */
277 args[1] = desc[3]; /* error */
278 args[2] = desc[5]; /* sector count (0:7) */
279 if (copy_to_user(arg, args, sizeof(args)))
291 && copy_to_user(arg + sizeof(args), argbuf, argsize))
300 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
301 * @scsidev: Device to which we are issuing command
302 * @arg: User provided data for issuing command
305 * Defined by the SCSI layer. We don't really care.
308 * Zero on success, negative errno on error.
310 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
313 u8 scsi_cmd[MAX_COMMAND_SIZE];
314 u8 args[7], *sensebuf = NULL;
320 if (copy_from_user(args, arg, sizeof(args)))
323 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
327 memset(scsi_cmd, 0, sizeof(scsi_cmd));
328 scsi_cmd[0] = ATA_16;
329 scsi_cmd[1] = (3 << 1); /* Non-data */
330 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
331 scsi_cmd[4] = args[1];
332 scsi_cmd[6] = args[2];
333 scsi_cmd[8] = args[3];
334 scsi_cmd[10] = args[4];
335 scsi_cmd[12] = args[5];
336 scsi_cmd[13] = args[6] & 0x4f;
337 scsi_cmd[14] = args[0];
339 /* Good values for timeout and retries? Values below
340 from scsi_ioctl_send_command() for default case... */
341 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
342 sensebuf, (10*HZ), 5, 0);
344 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
345 u8 *desc = sensebuf + 8;
346 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
348 /* If we set cc then ATA pass-through will cause a
349 * check condition even if no error. Filter that. */
350 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
351 struct scsi_sense_hdr sshdr;
352 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
354 if (sshdr.sense_key==0 &&
355 sshdr.asc==0 && sshdr.ascq==0)
356 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
359 /* Send userspace ATA registers */
360 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
361 desc[0] == 0x09) {/* code is "ATA Descriptor" */
362 args[0] = desc[13]; /* status */
363 args[1] = desc[3]; /* error */
364 args[2] = desc[5]; /* sector count (0:7) */
365 args[3] = desc[7]; /* lbal */
366 args[4] = desc[9]; /* lbam */
367 args[5] = desc[11]; /* lbah */
368 args[6] = desc[12]; /* select */
369 if (copy_to_user(arg, args, sizeof(args)))
384 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
386 int val = -EINVAL, rc = -EINVAL;
389 case ATA_IOC_GET_IO32:
391 if (copy_to_user(arg, &val, 1))
395 case ATA_IOC_SET_IO32:
396 val = (unsigned long) arg;
401 case HDIO_GET_IDENTITY:
402 return ata_get_identity(scsidev, arg);
405 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
407 return ata_cmd_ioctl(scsidev, arg);
409 case HDIO_DRIVE_TASK:
410 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
412 return ata_task_ioctl(scsidev, arg);
423 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
424 * @dev: ATA device to which the new command is attached
425 * @cmd: SCSI command that originated this ATA command
426 * @done: SCSI command completion function
428 * Obtain a reference to an unused ata_queued_cmd structure,
429 * which is the basic libata structure representing a single
430 * ATA command sent to the hardware.
432 * If a command was available, fill in the SCSI-specific
433 * portions of the structure with information on the
437 * spin_lock_irqsave(host lock)
440 * Command allocated, or %NULL if none available.
442 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
443 struct scsi_cmnd *cmd,
444 void (*done)(struct scsi_cmnd *))
446 struct ata_queued_cmd *qc;
448 qc = ata_qc_new_init(dev);
453 qc->__sg = scsi_sglist(cmd);
454 qc->n_elem = scsi_sg_count(cmd);
456 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
464 * ata_dump_status - user friendly display of error info
465 * @id: id of the port in question
466 * @tf: ptr to filled out taskfile
468 * Decode and dump the ATA error/status registers for the user so
469 * that they have some idea what really happened at the non
470 * make-believe layer.
473 * inherited from caller
475 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
477 u8 stat = tf->command, err = tf->feature;
479 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
480 if (stat & ATA_BUSY) {
481 printk("Busy }\n"); /* Data is not valid in this case */
483 if (stat & 0x40) printk("DriveReady ");
484 if (stat & 0x20) printk("DeviceFault ");
485 if (stat & 0x10) printk("SeekComplete ");
486 if (stat & 0x08) printk("DataRequest ");
487 if (stat & 0x04) printk("CorrectedError ");
488 if (stat & 0x02) printk("Index ");
489 if (stat & 0x01) printk("Error ");
493 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
494 if (err & 0x04) printk("DriveStatusError ");
496 if (err & 0x04) printk("BadCRC ");
497 else printk("Sector ");
499 if (err & 0x40) printk("UncorrectableError ");
500 if (err & 0x10) printk("SectorIdNotFound ");
501 if (err & 0x02) printk("TrackZeroNotFound ");
502 if (err & 0x01) printk("AddrMarkNotFound ");
509 * ata_to_sense_error - convert ATA error to SCSI error
510 * @id: ATA device number
511 * @drv_stat: value contained in ATA status register
512 * @drv_err: value contained in ATA error register
513 * @sk: the sense key we'll fill out
514 * @asc: the additional sense code we'll fill out
515 * @ascq: the additional sense code qualifier we'll fill out
516 * @verbose: be verbose
518 * Converts an ATA error into a SCSI error. Fill out pointers to
519 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
520 * format sense blocks.
523 * spin_lock_irqsave(host lock)
525 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
526 u8 *asc, u8 *ascq, int verbose)
530 /* Based on the 3ware driver translation table */
531 static const unsigned char sense_table[][4] = {
533 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
535 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
537 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
538 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
539 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
540 /* MC|ID|ABRT|TRK0|MARK */
541 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
543 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
544 /* Bad address mark */
545 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
547 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
549 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
550 /* Media change request */
551 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
553 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
555 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
557 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
558 /* BBD - block marked bad */
559 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
560 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
562 static const unsigned char stat_table[][4] = {
563 /* Must be first because BUSY means no other bits valid */
564 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
565 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
566 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
567 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
568 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
572 * Is this an error we can process/parse
574 if (drv_stat & ATA_BUSY) {
575 drv_err = 0; /* Ignore the err bits, they're invalid */
579 /* Look for drv_err */
580 for (i = 0; sense_table[i][0] != 0xFF; i++) {
581 /* Look for best matches first */
582 if ((sense_table[i][0] & drv_err) ==
584 *sk = sense_table[i][1];
585 *asc = sense_table[i][2];
586 *ascq = sense_table[i][3];
590 /* No immediate match */
592 printk(KERN_WARNING "ata%u: no sense translation for "
593 "error 0x%02x\n", id, drv_err);
596 /* Fall back to interpreting status bits */
597 for (i = 0; stat_table[i][0] != 0xFF; i++) {
598 if (stat_table[i][0] & drv_stat) {
599 *sk = stat_table[i][1];
600 *asc = stat_table[i][2];
601 *ascq = stat_table[i][3];
605 /* No error? Undecoded? */
607 printk(KERN_WARNING "ata%u: no sense translation for "
608 "status: 0x%02x\n", id, drv_stat);
610 /* We need a sensible error return here, which is tricky, and one
611 that won't cause people to do things like return a disk wrongly */
612 *sk = ABORTED_COMMAND;
618 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
619 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
620 id, drv_stat, drv_err, *sk, *asc, *ascq);
625 * ata_gen_passthru_sense - Generate check condition sense block.
626 * @qc: Command that completed.
628 * This function is specific to the ATA descriptor format sense
629 * block specified for the ATA pass through commands. Regardless
630 * of whether the command errored or not, return a sense
631 * block. Copy all controller registers into the sense
632 * block. Clear sense key, ASC & ASCQ if there is no error.
637 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
639 struct scsi_cmnd *cmd = qc->scsicmd;
640 struct ata_taskfile *tf = &qc->result_tf;
641 unsigned char *sb = cmd->sense_buffer;
642 unsigned char *desc = sb + 8;
643 int verbose = qc->ap->ops->error_handler == NULL;
645 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
647 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
650 * Use ata_to_sense_error() to map status register bits
651 * onto sense key, asc & ascq.
654 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
655 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
656 &sb[1], &sb[2], &sb[3], verbose);
661 * Sense data is current and format is descriptor.
667 /* set length of additional sense data */
672 * Copy registers into sense buffer.
675 desc[3] = tf->feature; /* == error reg */
680 desc[12] = tf->device;
681 desc[13] = tf->command; /* == status reg */
684 * Fill in Extend bit, and the high order bytes
687 if (tf->flags & ATA_TFLAG_LBA48) {
689 desc[4] = tf->hob_nsect;
690 desc[6] = tf->hob_lbal;
691 desc[8] = tf->hob_lbam;
692 desc[10] = tf->hob_lbah;
697 * ata_gen_ata_sense - generate a SCSI fixed sense block
698 * @qc: Command that we are erroring out
700 * Generate sense block for a failed ATA command @qc. Descriptor
701 * format is used to accomodate LBA48 block address.
706 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
708 struct ata_device *dev = qc->dev;
709 struct scsi_cmnd *cmd = qc->scsicmd;
710 struct ata_taskfile *tf = &qc->result_tf;
711 unsigned char *sb = cmd->sense_buffer;
712 unsigned char *desc = sb + 8;
713 int verbose = qc->ap->ops->error_handler == NULL;
716 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
718 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
720 /* sense data is current and format is descriptor */
723 /* Use ata_to_sense_error() to map status register bits
724 * onto sense key, asc & ascq.
727 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
728 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
729 &sb[1], &sb[2], &sb[3], verbose);
733 block = ata_tf_read_block(&qc->result_tf, dev);
735 /* information sense data descriptor */
740 desc[2] |= 0x80; /* valid */
741 desc[6] = block >> 40;
742 desc[7] = block >> 32;
743 desc[8] = block >> 24;
744 desc[9] = block >> 16;
745 desc[10] = block >> 8;
749 static void ata_scsi_sdev_config(struct scsi_device *sdev)
751 sdev->use_10_for_rw = 1;
752 sdev->use_10_for_ms = 1;
755 static void ata_scsi_dev_config(struct scsi_device *sdev,
756 struct ata_device *dev)
758 /* configure max sectors */
759 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
761 /* SATA DMA transfers must be multiples of 4 byte, so
762 * we need to pad ATAPI transfers using an extra sg.
763 * Decrement max hw segments accordingly.
765 if (dev->class == ATA_DEV_ATAPI) {
766 struct request_queue *q = sdev->request_queue;
767 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
770 if (dev->flags & ATA_DFLAG_NCQ) {
773 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
774 depth = min(ATA_MAX_QUEUE - 1, depth);
775 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
780 * ata_scsi_slave_config - Set SCSI device attributes
781 * @sdev: SCSI device to examine
783 * This is called before we actually start reading
784 * and writing to the device, to configure certain
785 * SCSI mid-layer behaviors.
788 * Defined by SCSI layer. We don't really care.
791 int ata_scsi_slave_config(struct scsi_device *sdev)
793 struct ata_port *ap = ata_shost_to_port(sdev->host);
794 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
796 ata_scsi_sdev_config(sdev);
798 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
800 sdev->manage_start_stop = 1;
803 ata_scsi_dev_config(sdev, dev);
805 return 0; /* scsi layer doesn't check return value, sigh */
809 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
810 * @sdev: SCSI device to be destroyed
812 * @sdev is about to be destroyed for hot/warm unplugging. If
813 * this unplugging was initiated by libata as indicated by NULL
814 * dev->sdev, this function doesn't have to do anything.
815 * Otherwise, SCSI layer initiated warm-unplug is in progress.
816 * Clear dev->sdev, schedule the device for ATA detach and invoke
820 * Defined by SCSI layer. We don't really care.
822 void ata_scsi_slave_destroy(struct scsi_device *sdev)
824 struct ata_port *ap = ata_shost_to_port(sdev->host);
826 struct ata_device *dev;
828 if (!ap->ops->error_handler)
831 spin_lock_irqsave(ap->lock, flags);
832 dev = __ata_scsi_find_dev(ap, sdev);
833 if (dev && dev->sdev) {
834 /* SCSI device already in CANCEL state, no need to offline it */
836 dev->flags |= ATA_DFLAG_DETACH;
837 ata_port_schedule_eh(ap);
839 spin_unlock_irqrestore(ap->lock, flags);
843 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
844 * @sdev: SCSI device to configure queue depth for
845 * @queue_depth: new queue depth
847 * This is libata standard hostt->change_queue_depth callback.
848 * SCSI will call into this callback when user tries to set queue
852 * SCSI layer (we don't care)
855 * Newly configured queue depth.
857 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
859 struct ata_port *ap = ata_shost_to_port(sdev->host);
860 struct ata_device *dev;
863 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
864 return sdev->queue_depth;
866 dev = ata_scsi_find_dev(ap, sdev);
867 if (!dev || !ata_dev_enabled(dev))
868 return sdev->queue_depth;
871 spin_lock_irqsave(ap->lock, flags);
872 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
873 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
874 dev->flags |= ATA_DFLAG_NCQ_OFF;
877 spin_unlock_irqrestore(ap->lock, flags);
879 /* limit and apply queue depth */
880 queue_depth = min(queue_depth, sdev->host->can_queue);
881 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
882 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
884 if (sdev->queue_depth == queue_depth)
887 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
891 /* XXX: for spindown warning */
892 static void ata_delayed_done_timerfn(unsigned long arg)
894 struct scsi_cmnd *scmd = (void *)arg;
896 scmd->scsi_done(scmd);
899 /* XXX: for spindown warning */
900 static void ata_delayed_done(struct scsi_cmnd *scmd)
902 static struct timer_list timer;
904 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
905 mod_timer(&timer, jiffies + 5 * HZ);
909 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
910 * @qc: Storage for translated ATA taskfile
912 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
913 * (to start). Perhaps these commands should be preceded by
914 * CHECK POWER MODE to see what power mode the device is already in.
915 * [See SAT revision 5 at www.t10.org]
918 * spin_lock_irqsave(host lock)
921 * Zero on success, non-zero on error.
923 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
925 struct scsi_cmnd *scmd = qc->scsicmd;
926 struct ata_taskfile *tf = &qc->tf;
927 const u8 *cdb = scmd->cmnd;
929 if (scmd->cmd_len < 5)
932 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
933 tf->protocol = ATA_PROT_NODATA;
935 ; /* ignore IMMED bit, violates sat-r05 */
938 goto invalid_fld; /* LOEJ bit set not supported */
939 if (((cdb[4] >> 4) & 0xf) != 0)
940 goto invalid_fld; /* power conditions not supported */
942 tf->nsect = 1; /* 1 sector, lba=0 */
944 if (qc->dev->flags & ATA_DFLAG_LBA) {
945 tf->flags |= ATA_TFLAG_LBA;
950 tf->device |= ATA_LBA;
953 tf->lbal = 0x1; /* sect */
954 tf->lbam = 0x0; /* cyl low */
955 tf->lbah = 0x0; /* cyl high */
958 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
960 /* XXX: This is for backward compatibility, will be
961 * removed. Read Documentation/feature-removal-schedule.txt
964 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
965 (system_state == SYSTEM_HALT ||
966 system_state == SYSTEM_POWER_OFF)) {
967 static unsigned long warned = 0;
969 if (!test_and_set_bit(0, &warned)) {
970 ata_dev_printk(qc->dev, KERN_WARNING,
971 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
972 "UPDATE SHUTDOWN UTILITY\n");
973 ata_dev_printk(qc->dev, KERN_WARNING,
974 "For more info, visit "
975 "http://linux-ata.org/shutdown.html\n");
977 /* ->scsi_done is not used, use it for
978 * delayed completion.
980 scmd->scsi_done = qc->scsidone;
981 qc->scsidone = ata_delayed_done;
983 scmd->result = SAM_STAT_GOOD;
987 /* Issue ATA STANDBY IMMEDIATE command */
988 tf->command = ATA_CMD_STANDBYNOW1;
992 * Standby and Idle condition timers could be implemented but that
993 * would require libata to implement the Power condition mode page
994 * and allow the user to change it. Changing mode pages requires
995 * MODE SELECT to be implemented.
1001 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1002 /* "Invalid field in cbd" */
1008 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1009 * @qc: Storage for translated ATA taskfile
1011 * Sets up an ATA taskfile to issue FLUSH CACHE or
1015 * spin_lock_irqsave(host lock)
1018 * Zero on success, non-zero on error.
1020 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1022 struct ata_taskfile *tf = &qc->tf;
1024 tf->flags |= ATA_TFLAG_DEVICE;
1025 tf->protocol = ATA_PROT_NODATA;
1027 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1028 tf->command = ATA_CMD_FLUSH_EXT;
1030 tf->command = ATA_CMD_FLUSH;
1036 * scsi_6_lba_len - Get LBA and transfer length
1037 * @cdb: SCSI command to translate
1039 * Calculate LBA and transfer length for 6-byte commands.
1043 * @plen: the transfer length
1045 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1050 VPRINTK("six-byte command\n");
1052 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1053 lba |= ((u64)cdb[2]) << 8;
1054 lba |= ((u64)cdb[3]);
1063 * scsi_10_lba_len - Get LBA and transfer length
1064 * @cdb: SCSI command to translate
1066 * Calculate LBA and transfer length for 10-byte commands.
1070 * @plen: the transfer length
1072 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1077 VPRINTK("ten-byte command\n");
1079 lba |= ((u64)cdb[2]) << 24;
1080 lba |= ((u64)cdb[3]) << 16;
1081 lba |= ((u64)cdb[4]) << 8;
1082 lba |= ((u64)cdb[5]);
1084 len |= ((u32)cdb[7]) << 8;
1085 len |= ((u32)cdb[8]);
1092 * scsi_16_lba_len - Get LBA and transfer length
1093 * @cdb: SCSI command to translate
1095 * Calculate LBA and transfer length for 16-byte commands.
1099 * @plen: the transfer length
1101 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1106 VPRINTK("sixteen-byte command\n");
1108 lba |= ((u64)cdb[2]) << 56;
1109 lba |= ((u64)cdb[3]) << 48;
1110 lba |= ((u64)cdb[4]) << 40;
1111 lba |= ((u64)cdb[5]) << 32;
1112 lba |= ((u64)cdb[6]) << 24;
1113 lba |= ((u64)cdb[7]) << 16;
1114 lba |= ((u64)cdb[8]) << 8;
1115 lba |= ((u64)cdb[9]);
1117 len |= ((u32)cdb[10]) << 24;
1118 len |= ((u32)cdb[11]) << 16;
1119 len |= ((u32)cdb[12]) << 8;
1120 len |= ((u32)cdb[13]);
1127 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1128 * @qc: Storage for translated ATA taskfile
1130 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1133 * spin_lock_irqsave(host lock)
1136 * Zero on success, non-zero on error.
1138 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1140 struct scsi_cmnd *scmd = qc->scsicmd;
1141 struct ata_taskfile *tf = &qc->tf;
1142 struct ata_device *dev = qc->dev;
1143 u64 dev_sectors = qc->dev->n_sectors;
1144 const u8 *cdb = scmd->cmnd;
1148 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1149 tf->protocol = ATA_PROT_NODATA;
1151 if (cdb[0] == VERIFY) {
1152 if (scmd->cmd_len < 10)
1154 scsi_10_lba_len(cdb, &block, &n_block);
1155 } else if (cdb[0] == VERIFY_16) {
1156 if (scmd->cmd_len < 16)
1158 scsi_16_lba_len(cdb, &block, &n_block);
1164 if (block >= dev_sectors)
1166 if ((block + n_block) > dev_sectors)
1169 if (dev->flags & ATA_DFLAG_LBA) {
1170 tf->flags |= ATA_TFLAG_LBA;
1172 if (lba_28_ok(block, n_block)) {
1174 tf->command = ATA_CMD_VERIFY;
1175 tf->device |= (block >> 24) & 0xf;
1176 } else if (lba_48_ok(block, n_block)) {
1177 if (!(dev->flags & ATA_DFLAG_LBA48))
1181 tf->flags |= ATA_TFLAG_LBA48;
1182 tf->command = ATA_CMD_VERIFY_EXT;
1184 tf->hob_nsect = (n_block >> 8) & 0xff;
1186 tf->hob_lbah = (block >> 40) & 0xff;
1187 tf->hob_lbam = (block >> 32) & 0xff;
1188 tf->hob_lbal = (block >> 24) & 0xff;
1190 /* request too large even for LBA48 */
1193 tf->nsect = n_block & 0xff;
1195 tf->lbah = (block >> 16) & 0xff;
1196 tf->lbam = (block >> 8) & 0xff;
1197 tf->lbal = block & 0xff;
1199 tf->device |= ATA_LBA;
1202 u32 sect, head, cyl, track;
1204 if (!lba_28_ok(block, n_block))
1207 /* Convert LBA to CHS */
1208 track = (u32)block / dev->sectors;
1209 cyl = track / dev->heads;
1210 head = track % dev->heads;
1211 sect = (u32)block % dev->sectors + 1;
1213 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1214 (u32)block, track, cyl, head, sect);
1216 /* Check whether the converted CHS can fit.
1220 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1223 tf->command = ATA_CMD_VERIFY;
1224 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1227 tf->lbah = cyl >> 8;
1234 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1235 /* "Invalid field in cbd" */
1239 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1240 /* "Logical Block Address out of range" */
1244 scmd->result = SAM_STAT_GOOD;
1249 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1250 * @qc: Storage for translated ATA taskfile
1252 * Converts any of six SCSI read/write commands into the
1253 * ATA counterpart, including starting sector (LBA),
1254 * sector count, and taking into account the device's LBA48
1257 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1258 * %WRITE_16 are currently supported.
1261 * spin_lock_irqsave(host lock)
1264 * Zero on success, non-zero on error.
1266 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1268 struct scsi_cmnd *scmd = qc->scsicmd;
1269 const u8 *cdb = scmd->cmnd;
1270 unsigned int tf_flags = 0;
1275 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1276 tf_flags |= ATA_TFLAG_WRITE;
1278 /* Calculate the SCSI LBA, transfer length and FUA. */
1282 if (unlikely(scmd->cmd_len < 10))
1284 scsi_10_lba_len(cdb, &block, &n_block);
1285 if (unlikely(cdb[1] & (1 << 3)))
1286 tf_flags |= ATA_TFLAG_FUA;
1290 if (unlikely(scmd->cmd_len < 6))
1292 scsi_6_lba_len(cdb, &block, &n_block);
1294 /* for 6-byte r/w commands, transfer length 0
1295 * means 256 blocks of data, not 0 block.
1302 if (unlikely(scmd->cmd_len < 16))
1304 scsi_16_lba_len(cdb, &block, &n_block);
1305 if (unlikely(cdb[1] & (1 << 3)))
1306 tf_flags |= ATA_TFLAG_FUA;
1309 DPRINTK("no-byte command\n");
1313 /* Check and compose ATA command */
1315 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1316 * length 0 means transfer 0 block of data.
1317 * However, for ATA R/W commands, sector count 0 means
1318 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1320 * WARNING: one or two older ATA drives treat 0 as 0...
1324 qc->flags |= ATA_QCFLAG_IO;
1325 qc->nbytes = n_block * ATA_SECT_SIZE;
1327 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1329 if (likely(rc == 0))
1334 /* treat all other errors as -EINVAL, fall through */
1336 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1337 /* "Invalid field in cbd" */
1341 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1342 /* "Logical Block Address out of range" */
1346 scmd->result = SAM_STAT_GOOD;
1350 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1352 struct ata_port *ap = qc->ap;
1353 struct scsi_cmnd *cmd = qc->scsicmd;
1354 u8 *cdb = cmd->cmnd;
1355 int need_sense = (qc->err_mask != 0);
1357 /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and
1358 * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
1361 if (ap->ops->error_handler && !need_sense) {
1362 switch (qc->tf.command) {
1363 case ATA_CMD_SET_FEATURES:
1364 if ((qc->tf.feature == SETFEATURES_WC_ON) ||
1365 (qc->tf.feature == SETFEATURES_WC_OFF)) {
1366 ap->link.eh_info.action |= ATA_EH_REVALIDATE;
1367 ata_port_schedule_eh(ap);
1371 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
1372 case ATA_CMD_SET_MULTI: /* multi_count changed */
1373 ap->link.eh_info.action |= ATA_EH_REVALIDATE;
1374 ata_port_schedule_eh(ap);
1379 /* For ATA pass thru (SAT) commands, generate a sense block if
1380 * user mandated it or if there's an error. Note that if we
1381 * generate because the user forced us to, a check condition
1382 * is generated and the ATA register values are returned
1383 * whether the command completed successfully or not. If there
1384 * was no error, SK, ASC and ASCQ will all be zero.
1386 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1387 ((cdb[2] & 0x20) || need_sense)) {
1388 ata_gen_passthru_sense(qc);
1391 cmd->result = SAM_STAT_GOOD;
1393 /* TODO: decide which descriptor format to use
1394 * for 48b LBA devices and call that here
1395 * instead of the fixed desc, which is only
1396 * good for smaller LBA (and maybe CHS?)
1399 ata_gen_ata_sense(qc);
1403 /* XXX: track spindown state for spindown skipping and warning */
1404 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1405 qc->tf.command == ATA_CMD_STANDBYNOW1))
1406 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1407 else if (likely(system_state != SYSTEM_HALT &&
1408 system_state != SYSTEM_POWER_OFF))
1409 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1411 if (need_sense && !ap->ops->error_handler)
1412 ata_dump_status(ap->print_id, &qc->result_tf);
1420 * ata_scmd_need_defer - Check whether we need to defer scmd
1421 * @dev: ATA device to which the command is addressed
1422 * @is_io: Is the command IO (and thus possibly NCQ)?
1424 * NCQ and non-NCQ commands cannot run together. As upper layer
1425 * only knows the queue depth, we are responsible for maintaining
1426 * exclusion. This function checks whether a new command can be
1430 * spin_lock_irqsave(host lock)
1433 * 1 if deferring is needed, 0 otherwise.
1435 static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
1437 struct ata_link *link = dev->link;
1438 int is_ncq = is_io && ata_ncq_enabled(dev);
1441 if (!ata_tag_valid(link->active_tag))
1444 if (!ata_tag_valid(link->active_tag) && !link->sactive)
1451 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1452 * @dev: ATA device to which the command is addressed
1453 * @cmd: SCSI command to execute
1454 * @done: SCSI command completion function
1455 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1457 * Our ->queuecommand() function has decided that the SCSI
1458 * command issued can be directly translated into an ATA
1459 * command, rather than handled internally.
1461 * This function sets up an ata_queued_cmd structure for the
1462 * SCSI command, and sends that ata_queued_cmd to the hardware.
1464 * The xlat_func argument (actor) returns 0 if ready to execute
1465 * ATA command, else 1 to finish translation. If 1 is returned
1466 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1467 * to be set reflecting an error condition or clean (early)
1471 * spin_lock_irqsave(host lock)
1474 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1475 * needs to be deferred.
1477 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1478 void (*done)(struct scsi_cmnd *),
1479 ata_xlat_func_t xlat_func)
1481 struct ata_queued_cmd *qc;
1482 int is_io = xlat_func == ata_scsi_rw_xlat;
1486 if (unlikely(ata_scmd_need_defer(dev, is_io)))
1489 qc = ata_scsi_qc_new(dev, cmd, done);
1493 /* data is present; dma-map it */
1494 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1495 cmd->sc_data_direction == DMA_TO_DEVICE) {
1496 if (unlikely(scsi_bufflen(cmd) < 1)) {
1497 ata_dev_printk(dev, KERN_WARNING,
1498 "WARNING: zero len r/w req\n");
1502 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1504 qc->dma_dir = cmd->sc_data_direction;
1507 qc->complete_fn = ata_scsi_qc_complete;
1512 /* select device, send command to hardware */
1521 DPRINTK("EXIT - early finish (good or error)\n");
1526 cmd->result = (DID_ERROR << 16);
1529 DPRINTK("EXIT - internal\n");
1533 DPRINTK("EXIT - defer\n");
1534 return SCSI_MLQUEUE_DEVICE_BUSY;
1538 * ata_scsi_rbuf_get - Map response buffer.
1539 * @cmd: SCSI command containing buffer to be mapped.
1540 * @buf_out: Pointer to mapped area.
1542 * Maps buffer contained within SCSI command @cmd.
1545 * spin_lock_irqsave(host lock)
1548 * Length of response buffer.
1551 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1554 unsigned int buflen;
1556 struct scatterlist *sg = scsi_sglist(cmd);
1559 buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
1560 buflen = sg->length;
1571 * ata_scsi_rbuf_put - Unmap response buffer.
1572 * @cmd: SCSI command containing buffer to be unmapped.
1573 * @buf: buffer to unmap
1575 * Unmaps response buffer contained within @cmd.
1578 * spin_lock_irqsave(host lock)
1581 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1583 struct scatterlist *sg = scsi_sglist(cmd);
1585 kunmap_atomic(buf - sg->offset, KM_IRQ0);
1589 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1590 * @args: device IDENTIFY data / SCSI command of interest.
1591 * @actor: Callback hook for desired SCSI command simulator
1593 * Takes care of the hard work of simulating a SCSI command...
1594 * Mapping the response buffer, calling the command's handler,
1595 * and handling the handler's return value. This return value
1596 * indicates whether the handler wishes the SCSI command to be
1597 * completed successfully (0), or not (in which case cmd->result
1598 * and sense buffer are assumed to be set).
1601 * spin_lock_irqsave(host lock)
1604 void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1605 unsigned int (*actor) (struct ata_scsi_args *args,
1606 u8 *rbuf, unsigned int buflen))
1609 unsigned int buflen, rc;
1610 struct scsi_cmnd *cmd = args->cmd;
1612 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1613 memset(rbuf, 0, buflen);
1614 rc = actor(args, rbuf, buflen);
1615 ata_scsi_rbuf_put(cmd, rbuf);
1618 cmd->result = SAM_STAT_GOOD;
1623 * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer
1624 * @idx: byte index into SCSI response buffer
1625 * @val: value to set
1627 * To be used by SCSI command simulator functions. This macros
1628 * expects two local variables, u8 *rbuf and unsigned int buflen,
1634 #define ATA_SCSI_RBUF_SET(idx, val) do { \
1635 if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \
1639 * ata_scsiop_inq_std - Simulate INQUIRY command
1640 * @args: device IDENTIFY data / SCSI command of interest.
1641 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1642 * @buflen: Response buffer length.
1644 * Returns standard device identification data associated
1645 * with non-VPD INQUIRY command output.
1648 * spin_lock_irqsave(host lock)
1651 unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1652 unsigned int buflen)
1657 0x5, /* claim SPC-3 version compatibility */
1662 /* set scsi removeable (RMB) bit per ata bit */
1663 if (ata_id_removeable(args->id))
1668 memcpy(rbuf, hdr, sizeof(hdr));
1671 memcpy(&rbuf[8], "ATA ", 8);
1672 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1673 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1674 if (rbuf[32] == 0 || rbuf[32] == ' ')
1675 memcpy(&rbuf[32], "n/a ", 4);
1679 const u8 versions[] = {
1680 0x60, /* SAM-3 (no version claimed) */
1683 0x20, /* SBC-2 (no version claimed) */
1686 0x60 /* SPC-3 (no version claimed) */
1689 memcpy(rbuf + 59, versions, sizeof(versions));
1696 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1697 * @args: device IDENTIFY data / SCSI command of interest.
1698 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1699 * @buflen: Response buffer length.
1701 * Returns list of inquiry VPD pages available.
1704 * spin_lock_irqsave(host lock)
1707 unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1708 unsigned int buflen)
1710 const u8 pages[] = {
1711 0x00, /* page 0x00, this page */
1712 0x80, /* page 0x80, unit serial no page */
1713 0x83 /* page 0x83, device ident page */
1715 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1718 memcpy(rbuf + 4, pages, sizeof(pages));
1724 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1725 * @args: device IDENTIFY data / SCSI command of interest.
1726 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1727 * @buflen: Response buffer length.
1729 * Returns ATA device serial number.
1732 * spin_lock_irqsave(host lock)
1735 unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1736 unsigned int buflen)
1740 0x80, /* this page code */
1742 ATA_ID_SERNO_LEN, /* page len */
1744 memcpy(rbuf, hdr, sizeof(hdr));
1746 if (buflen > (ATA_ID_SERNO_LEN + 4 - 1))
1747 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1748 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1754 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1755 * @args: device IDENTIFY data / SCSI command of interest.
1756 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1757 * @buflen: Response buffer length.
1759 * Yields two logical unit device identification designators:
1760 * - vendor specific ASCII containing the ATA serial number
1761 * - SAT defined "t10 vendor id based" containing ASCII vendor
1762 * name ("ATA "), model and serial numbers.
1765 * spin_lock_irqsave(host lock)
1768 unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1769 unsigned int buflen)
1772 const int sat_model_serial_desc_len = 68;
1774 rbuf[1] = 0x83; /* this page code */
1777 if (buflen > (ATA_ID_SERNO_LEN + num + 3)) {
1778 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1780 rbuf[num + 3] = ATA_ID_SERNO_LEN;
1782 ata_id_string(args->id, (unsigned char *) rbuf + num,
1783 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1784 num += ATA_ID_SERNO_LEN;
1786 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1787 /* SAT defined lu model and serial numbers descriptor */
1788 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1791 rbuf[num + 3] = sat_model_serial_desc_len;
1793 memcpy(rbuf + num, "ATA ", 8);
1795 ata_id_string(args->id, (unsigned char *) rbuf + num,
1796 ATA_ID_PROD, ATA_ID_PROD_LEN);
1797 num += ATA_ID_PROD_LEN;
1798 ata_id_string(args->id, (unsigned char *) rbuf + num,
1799 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1800 num += ATA_ID_SERNO_LEN;
1802 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1807 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
1808 * @args: device IDENTIFY data / SCSI command of interest.
1809 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1810 * @buflen: Response buffer length.
1812 * Yields SAT-specified ATA VPD page.
1815 * spin_lock_irqsave(host lock)
1818 unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf,
1819 unsigned int buflen)
1822 struct ata_taskfile tf;
1828 memset(&pbuf, 0, sizeof(pbuf));
1829 memset(&tf, 0, sizeof(tf));
1831 pbuf[1] = 0x89; /* our page code */
1832 pbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
1833 pbuf[3] = (0x238 & 0xff);
1835 memcpy(&pbuf[8], "ATA ", 8);
1836 ata_id_string(args->id, &pbuf[16], ATA_ID_PROD, 16);
1837 ata_id_string(args->id, &pbuf[32], ATA_ID_FW_REV, 4);
1839 /* we don't store the ATA device signature, so we fake it */
1841 tf.command = ATA_DRDY; /* really, this is Status reg */
1845 ata_tf_to_fis(&tf, 0, 1, &pbuf[36]); /* TODO: PMP? */
1846 pbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
1848 pbuf[56] = ATA_CMD_ID_ATA;
1850 i = min(buflen, 60U);
1851 memcpy(rbuf, &pbuf[0], i);
1857 memcpy(&rbuf[60], &args->id[0], min(buflen, 512U));
1862 * ata_scsiop_noop - Command handler that simply returns success.
1863 * @args: device IDENTIFY data / SCSI command of interest.
1864 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1865 * @buflen: Response buffer length.
1867 * No operation. Simply returns success to caller, to indicate
1868 * that the caller should successfully complete this SCSI command.
1871 * spin_lock_irqsave(host lock)
1874 unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1875 unsigned int buflen)
1882 * ata_msense_push - Push data onto MODE SENSE data output buffer
1883 * @ptr_io: (input/output) Location to store more output data
1884 * @last: End of output data buffer
1885 * @buf: Pointer to BLOB being added to output buffer
1886 * @buflen: Length of BLOB
1888 * Store MODE SENSE data on an output buffer.
1894 static void ata_msense_push(u8 **ptr_io, const u8 *last,
1895 const u8 *buf, unsigned int buflen)
1899 if ((ptr + buflen - 1) > last)
1902 memcpy(ptr, buf, buflen);
1910 * ata_msense_caching - Simulate MODE SENSE caching info page
1911 * @id: device IDENTIFY data
1912 * @ptr_io: (input/output) Location to store more output data
1913 * @last: End of output data buffer
1915 * Generate a caching info page, which conditionally indicates
1916 * write caching to the SCSI layer, depending on device
1923 static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1926 u8 page[CACHE_MPAGE_LEN];
1928 memcpy(page, def_cache_mpage, sizeof(page));
1929 if (ata_id_wcache_enabled(id))
1930 page[2] |= (1 << 2); /* write cache enable */
1931 if (!ata_id_rahead_enabled(id))
1932 page[12] |= (1 << 5); /* disable read ahead */
1934 ata_msense_push(ptr_io, last, page, sizeof(page));
1935 return sizeof(page);
1939 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1940 * @dev: Device associated with this MODE SENSE command
1941 * @ptr_io: (input/output) Location to store more output data
1942 * @last: End of output data buffer
1944 * Generate a generic MODE SENSE control mode page.
1950 static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1952 ata_msense_push(ptr_io, last, def_control_mpage,
1953 sizeof(def_control_mpage));
1954 return sizeof(def_control_mpage);
1958 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1959 * @dev: Device associated with this MODE SENSE command
1960 * @ptr_io: (input/output) Location to store more output data
1961 * @last: End of output data buffer
1963 * Generate a generic MODE SENSE r/w error recovery page.
1969 static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1972 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1973 sizeof(def_rw_recovery_mpage));
1974 return sizeof(def_rw_recovery_mpage);
1978 * We can turn this into a real blacklist if it's needed, for now just
1979 * blacklist any Maxtor BANC1G10 revision firmware
1981 static int ata_dev_supports_fua(u16 *id)
1983 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
1987 if (!ata_id_has_fua(id))
1990 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
1991 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
1993 if (strcmp(model, "Maxtor"))
1995 if (strcmp(fw, "BANC1G10"))
1998 return 0; /* blacklisted */
2002 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2003 * @args: device IDENTIFY data / SCSI command of interest.
2004 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2005 * @buflen: Response buffer length.
2007 * Simulate MODE SENSE commands. Assume this is invoked for direct
2008 * access devices (e.g. disks) only. There should be no block
2009 * descriptor for other device types.
2012 * spin_lock_irqsave(host lock)
2015 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
2016 unsigned int buflen)
2018 struct ata_device *dev = args->dev;
2019 u8 *scsicmd = args->cmd->cmnd, *p, *last;
2020 const u8 sat_blk_desc[] = {
2021 0, 0, 0, 0, /* number of blocks: sat unspecified */
2023 0, 0x2, 0x0 /* block length: 512 bytes */
2026 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
2031 six_byte = (scsicmd[0] == MODE_SENSE);
2032 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2034 * LLBA bit in msense(10) ignored (compliant)
2037 page_control = scsicmd[2] >> 6;
2038 switch (page_control) {
2039 case 0: /* current */
2040 break; /* supported */
2042 goto saving_not_supp;
2043 case 1: /* changeable */
2044 case 2: /* defaults */
2050 output_len = 4 + (ebd ? 8 : 0);
2051 alloc_len = scsicmd[4];
2053 output_len = 8 + (ebd ? 8 : 0);
2054 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2056 minlen = (alloc_len < buflen) ? alloc_len : buflen;
2058 p = rbuf + output_len;
2059 last = rbuf + minlen - 1;
2061 pg = scsicmd[2] & 0x3f;
2064 * No mode subpages supported (yet) but asking for _all_
2065 * subpages may be valid
2067 if (spg && (spg != ALL_SUB_MPAGES))
2071 case RW_RECOVERY_MPAGE:
2072 output_len += ata_msense_rw_recovery(&p, last);
2076 output_len += ata_msense_caching(args->id, &p, last);
2079 case CONTROL_MPAGE: {
2080 output_len += ata_msense_ctl_mode(&p, last);
2085 output_len += ata_msense_rw_recovery(&p, last);
2086 output_len += ata_msense_caching(args->id, &p, last);
2087 output_len += ata_msense_ctl_mode(&p, last);
2090 default: /* invalid page code */
2098 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2099 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2104 rbuf[0] = output_len;
2109 rbuf[3] = sizeof(sat_blk_desc);
2111 memcpy(rbuf + 4, sat_blk_desc,
2112 sizeof(sat_blk_desc));
2116 rbuf[0] = output_len >> 8;
2118 rbuf[1] = output_len;
2123 rbuf[7] = sizeof(sat_blk_desc);
2125 memcpy(rbuf + 8, sat_blk_desc,
2126 sizeof(sat_blk_desc));
2132 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2133 /* "Invalid field in cbd" */
2137 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2138 /* "Saving parameters not supported" */
2143 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2144 * @args: device IDENTIFY data / SCSI command of interest.
2145 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2146 * @buflen: Response buffer length.
2148 * Simulate READ CAPACITY commands.
2153 unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2154 unsigned int buflen)
2156 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
2160 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2161 if (last_lba >= 0xffffffffULL)
2162 last_lba = 0xffffffff;
2164 /* sector count, 32-bit */
2165 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3));
2166 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2));
2167 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1));
2168 ATA_SCSI_RBUF_SET(3, last_lba);
2171 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8);
2172 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE);
2174 /* sector count, 64-bit */
2175 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7));
2176 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6));
2177 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5));
2178 ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4));
2179 ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3));
2180 ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2));
2181 ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1));
2182 ATA_SCSI_RBUF_SET(7, last_lba);
2185 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8);
2186 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE);
2193 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2194 * @args: device IDENTIFY data / SCSI command of interest.
2195 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2196 * @buflen: Response buffer length.
2198 * Simulate REPORT LUNS command.
2201 * spin_lock_irqsave(host lock)
2204 unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2205 unsigned int buflen)
2208 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2214 * ata_scsi_set_sense - Set SCSI sense data and status
2215 * @cmd: SCSI request to be handled
2216 * @sk: SCSI-defined sense key
2217 * @asc: SCSI-defined additional sense code
2218 * @ascq: SCSI-defined additional sense code qualifier
2220 * Helper function that builds a valid fixed format, current
2221 * response code and the given sense key (sk), additional sense
2222 * code (asc) and additional sense code qualifier (ascq) with
2223 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2224 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2230 void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2232 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2234 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2235 cmd->sense_buffer[2] = sk;
2236 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2237 cmd->sense_buffer[12] = asc;
2238 cmd->sense_buffer[13] = ascq;
2242 * ata_scsi_badcmd - End a SCSI request with an error
2243 * @cmd: SCSI request to be handled
2244 * @done: SCSI command completion function
2245 * @asc: SCSI-defined additional sense code
2246 * @ascq: SCSI-defined additional sense code qualifier
2248 * Helper function that completes a SCSI command with
2249 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2250 * and the specified additional sense codes.
2253 * spin_lock_irqsave(host lock)
2256 void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2259 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
2264 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2266 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2267 /* FIXME: not quite right; we don't want the
2268 * translation of taskfile registers into
2269 * a sense descriptors, since that's only
2270 * correct for ATA, not ATAPI
2272 ata_gen_passthru_sense(qc);
2275 qc->scsidone(qc->scsicmd);
2279 /* is it pointless to prefer PIO for "safety reasons"? */
2280 static inline int ata_pio_use_silly(struct ata_port *ap)
2282 return (ap->flags & ATA_FLAG_PIO_DMA);
2285 static void atapi_request_sense(struct ata_queued_cmd *qc)
2287 struct ata_port *ap = qc->ap;
2288 struct scsi_cmnd *cmd = qc->scsicmd;
2290 DPRINTK("ATAPI request sense\n");
2292 /* FIXME: is this needed? */
2293 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2295 ap->ops->tf_read(ap, &qc->tf);
2297 /* fill these in, for the case where they are -not- overwritten */
2298 cmd->sense_buffer[0] = 0x70;
2299 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2303 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2304 qc->dma_dir = DMA_FROM_DEVICE;
2306 memset(&qc->cdb, 0, qc->dev->cdb_len);
2307 qc->cdb[0] = REQUEST_SENSE;
2308 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2310 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2311 qc->tf.command = ATA_CMD_PACKET;
2313 if (ata_pio_use_silly(ap)) {
2314 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2315 qc->tf.feature |= ATAPI_PKT_DMA;
2317 qc->tf.protocol = ATA_PROT_ATAPI;
2318 qc->tf.lbam = (8 * 1024) & 0xff;
2319 qc->tf.lbah = (8 * 1024) >> 8;
2321 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2323 qc->complete_fn = atapi_sense_complete;
2330 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2332 struct scsi_cmnd *cmd = qc->scsicmd;
2333 unsigned int err_mask = qc->err_mask;
2335 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2337 /* handle completion from new EH */
2338 if (unlikely(qc->ap->ops->error_handler &&
2339 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2341 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2342 /* FIXME: not quite right; we don't want the
2343 * translation of taskfile registers into a
2344 * sense descriptors, since that's only
2345 * correct for ATA, not ATAPI
2347 ata_gen_passthru_sense(qc);
2350 /* SCSI EH automatically locks door if sdev->locked is
2351 * set. Sometimes door lock request continues to
2352 * fail, for example, when no media is present. This
2353 * creates a loop - SCSI EH issues door lock which
2354 * fails and gets invoked again to acquire sense data
2355 * for the failed command.
2357 * If door lock fails, always clear sdev->locked to
2358 * avoid this infinite loop.
2360 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2361 qc->dev->sdev->locked = 0;
2363 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2369 /* successful completion or old EH failure path */
2370 if (unlikely(err_mask & AC_ERR_DEV)) {
2371 cmd->result = SAM_STAT_CHECK_CONDITION;
2372 atapi_request_sense(qc);
2374 } else if (unlikely(err_mask)) {
2375 /* FIXME: not quite right; we don't want the
2376 * translation of taskfile registers into
2377 * a sense descriptors, since that's only
2378 * correct for ATA, not ATAPI
2380 ata_gen_passthru_sense(qc);
2382 u8 *scsicmd = cmd->cmnd;
2384 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2386 unsigned int buflen;
2388 buflen = ata_scsi_rbuf_get(cmd, &buf);
2390 /* ATAPI devices typically report zero for their SCSI version,
2391 * and sometimes deviate from the spec WRT response data
2392 * format. If SCSI version is reported as zero like normal,
2393 * then we make the following fixups: 1) Fake MMC-5 version,
2394 * to indicate to the Linux scsi midlayer this is a modern
2395 * device. 2) Ensure response data format / ATAPI information
2396 * are always correct.
2403 ata_scsi_rbuf_put(cmd, buf);
2406 cmd->result = SAM_STAT_GOOD;
2413 * atapi_xlat - Initialize PACKET taskfile
2414 * @qc: command structure to be initialized
2417 * spin_lock_irqsave(host lock)
2420 * Zero on success, non-zero on failure.
2422 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2424 struct scsi_cmnd *scmd = qc->scsicmd;
2425 struct ata_device *dev = qc->dev;
2426 int using_pio = (dev->flags & ATA_DFLAG_PIO);
2427 int nodata = (scmd->sc_data_direction == DMA_NONE);
2429 memset(qc->cdb, 0, dev->cdb_len);
2430 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2432 qc->complete_fn = atapi_qc_complete;
2434 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2435 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2436 qc->tf.flags |= ATA_TFLAG_WRITE;
2437 DPRINTK("direction: write\n");
2440 qc->tf.command = ATA_CMD_PACKET;
2441 qc->nbytes = scsi_bufflen(scmd);
2443 /* check whether ATAPI DMA is safe */
2444 if (!using_pio && ata_check_atapi_dma(qc))
2447 if (using_pio || nodata) {
2448 /* no data, or PIO data xfer */
2450 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2452 qc->tf.protocol = ATA_PROT_ATAPI;
2453 qc->tf.lbam = (8 * 1024) & 0xff;
2454 qc->tf.lbah = (8 * 1024) >> 8;
2457 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2458 qc->tf.feature |= ATAPI_PKT_DMA;
2460 if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE))
2461 /* some SATA bridges need us to indicate data xfer direction */
2462 qc->tf.feature |= ATAPI_DMADIR;
2468 static struct ata_device * ata_find_dev(struct ata_port *ap, int devno)
2470 if (ap->nr_pmp_links == 0) {
2471 if (likely(devno < ata_link_max_devices(&ap->link)))
2472 return &ap->link.device[devno];
2474 if (likely(devno < ap->nr_pmp_links))
2475 return &ap->pmp_link[devno].device[0];
2481 static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
2482 const struct scsi_device *scsidev)
2486 /* skip commands not addressed to targets we simulate */
2487 if (ap->nr_pmp_links == 0) {
2488 if (unlikely(scsidev->channel || scsidev->lun))
2490 devno = scsidev->id;
2492 if (unlikely(scsidev->id || scsidev->lun))
2494 devno = scsidev->channel;
2497 return ata_find_dev(ap, devno);
2501 * ata_scsi_dev_enabled - determine if device is enabled
2504 * Determine if commands should be sent to the specified device.
2507 * spin_lock_irqsave(host lock)
2510 * 0 if commands are not allowed / 1 if commands are allowed
2513 static int ata_scsi_dev_enabled(struct ata_device *dev)
2515 if (unlikely(!ata_dev_enabled(dev)))
2518 if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) {
2519 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2520 ata_dev_printk(dev, KERN_WARNING,
2521 "WARNING: ATAPI is %s, device ignored.\n",
2522 atapi_enabled ? "not supported with this driver" : "disabled");
2531 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2532 * @ap: ATA port to which the device is attached
2533 * @scsidev: SCSI device from which we derive the ATA device
2535 * Given various information provided in struct scsi_cmnd,
2536 * map that onto an ATA bus, and using that mapping
2537 * determine which ata_device is associated with the
2538 * SCSI command to be sent.
2541 * spin_lock_irqsave(host lock)
2544 * Associated ATA device, or %NULL if not found.
2546 static struct ata_device *
2547 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2549 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2551 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
2558 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2559 * @byte1: Byte 1 from pass-thru CDB.
2562 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2565 ata_scsi_map_proto(u8 byte1)
2567 switch((byte1 & 0x1e) >> 1) {
2568 case 3: /* Non-data */
2569 return ATA_PROT_NODATA;
2572 case 10: /* UDMA Data-in */
2573 case 11: /* UDMA Data-Out */
2574 return ATA_PROT_DMA;
2576 case 4: /* PIO Data-in */
2577 case 5: /* PIO Data-out */
2578 return ATA_PROT_PIO;
2580 case 0: /* Hard Reset */
2582 case 8: /* Device Diagnostic */
2583 case 9: /* Device Reset */
2584 case 7: /* DMA Queued */
2585 case 12: /* FPDMA */
2586 case 15: /* Return Response Info */
2587 default: /* Reserved */
2591 return ATA_PROT_UNKNOWN;
2595 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2596 * @qc: command structure to be initialized
2598 * Handles either 12 or 16-byte versions of the CDB.
2601 * Zero on success, non-zero on failure.
2603 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2605 struct ata_taskfile *tf = &(qc->tf);
2606 struct scsi_cmnd *scmd = qc->scsicmd;
2607 struct ata_device *dev = qc->dev;
2608 const u8 *cdb = scmd->cmnd;
2610 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2613 /* We may not issue DMA commands if no DMA mode is set */
2614 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2618 * 12 and 16 byte CDBs use different offsets to
2619 * provide the various register values.
2621 if (cdb[0] == ATA_16) {
2623 * 16-byte CDB - may contain extended commands.
2625 * If that is the case, copy the upper byte register values.
2627 if (cdb[1] & 0x01) {
2628 tf->hob_feature = cdb[3];
2629 tf->hob_nsect = cdb[5];
2630 tf->hob_lbal = cdb[7];
2631 tf->hob_lbam = cdb[9];
2632 tf->hob_lbah = cdb[11];
2633 tf->flags |= ATA_TFLAG_LBA48;
2635 tf->flags &= ~ATA_TFLAG_LBA48;
2638 * Always copy low byte, device and command registers.
2640 tf->feature = cdb[4];
2645 tf->device = cdb[13];
2646 tf->command = cdb[14];
2649 * 12-byte CDB - incapable of extended commands.
2651 tf->flags &= ~ATA_TFLAG_LBA48;
2653 tf->feature = cdb[3];
2658 tf->device = cdb[8];
2659 tf->command = cdb[9];
2662 /* enforce correct master/slave bit */
2663 tf->device = dev->devno ?
2664 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2666 /* sanity check for pio multi commands */
2667 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2670 if (is_multi_taskfile(tf)) {
2671 unsigned int multi_count = 1 << (cdb[1] >> 5);
2673 /* compare the passed through multi_count
2674 * with the cached multi_count of libata
2676 if (multi_count != dev->multi_count)
2677 ata_dev_printk(dev, KERN_WARNING,
2678 "invalid multi_count %u ignored\n",
2682 /* READ/WRITE LONG use a non-standard sect_size */
2683 qc->sect_size = ATA_SECT_SIZE;
2684 switch (tf->command) {
2685 case ATA_CMD_READ_LONG:
2686 case ATA_CMD_READ_LONG_ONCE:
2687 case ATA_CMD_WRITE_LONG:
2688 case ATA_CMD_WRITE_LONG_ONCE:
2689 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2691 qc->sect_size = scsi_bufflen(scmd);
2695 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2696 * SET_FEATURES - XFER MODE must be preceded/succeeded
2697 * by an update to hardware-specific registers for each
2698 * controller (i.e. the reason for ->set_piomode(),
2699 * ->set_dmamode(), and ->post_set_mode() hooks).
2701 if ((tf->command == ATA_CMD_SET_FEATURES)
2702 && (tf->feature == SETFEATURES_XFER))
2706 * Set flags so that all registers will be written,
2707 * and pass on write indication (used for PIO/DMA
2710 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2712 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2713 tf->flags |= ATA_TFLAG_WRITE;
2716 * Set transfer length.
2718 * TODO: find out if we need to do more here to
2719 * cover scatter/gather case.
2721 qc->nbytes = scsi_bufflen(scmd);
2723 /* request result TF */
2724 qc->flags |= ATA_QCFLAG_RESULT_TF;
2729 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
2730 /* "Invalid field in cdb" */
2735 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2737 * @cmd: SCSI command opcode to consider
2739 * Look up the SCSI command given, and determine whether the
2740 * SCSI command is to be translated or simulated.
2743 * Pointer to translation function if possible, %NULL if not.
2746 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2756 return ata_scsi_rw_xlat;
2758 case SYNCHRONIZE_CACHE:
2759 if (ata_try_flush_cache(dev))
2760 return ata_scsi_flush_xlat;
2765 return ata_scsi_verify_xlat;
2769 return ata_scsi_pass_thru;
2772 return ata_scsi_start_stop_xlat;
2779 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2780 * @ap: ATA port to which the command was being sent
2781 * @cmd: SCSI command to dump
2783 * Prints the contents of a SCSI command via printk().
2786 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2787 struct scsi_cmnd *cmd)
2790 struct scsi_device *scsidev = cmd->device;
2791 u8 *scsicmd = cmd->cmnd;
2793 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2795 scsidev->channel, scsidev->id, scsidev->lun,
2796 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2797 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2802 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2803 void (*done)(struct scsi_cmnd *),
2804 struct ata_device *dev)
2806 u8 scsi_op = scmd->cmnd[0];
2807 ata_xlat_func_t xlat_func;
2810 if (dev->class == ATA_DEV_ATA) {
2811 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2814 xlat_func = ata_get_xlat_func(dev, scsi_op);
2816 if (unlikely(!scmd->cmd_len))
2820 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2821 /* relay SCSI command to ATAPI device */
2822 if (unlikely(scmd->cmd_len > dev->cdb_len))
2825 xlat_func = atapi_xlat;
2827 /* ATA_16 passthru, treat as an ATA command */
2828 if (unlikely(scmd->cmd_len > 16))
2831 xlat_func = ata_get_xlat_func(dev, scsi_op);
2836 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
2838 ata_scsi_simulate(dev, scmd, done);
2843 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
2844 scmd->cmd_len, scsi_op, dev->cdb_len);
2845 scmd->result = DID_ERROR << 16;
2851 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2852 * @cmd: SCSI command to be sent
2853 * @done: Completion function, called when command is complete
2855 * In some cases, this function translates SCSI commands into
2856 * ATA taskfiles, and queues the taskfiles to be sent to
2857 * hardware. In other cases, this function simulates a
2858 * SCSI device by evaluating and responding to certain
2859 * SCSI commands. This creates the overall effect of
2860 * ATA and ATAPI devices appearing as SCSI devices.
2863 * Releases scsi-layer-held lock, and obtains host lock.
2866 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2869 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2871 struct ata_port *ap;
2872 struct ata_device *dev;
2873 struct scsi_device *scsidev = cmd->device;
2874 struct Scsi_Host *shost = scsidev->host;
2877 ap = ata_shost_to_port(shost);
2879 spin_unlock(shost->host_lock);
2880 spin_lock(ap->lock);
2882 ata_scsi_dump_cdb(ap, cmd);
2884 dev = ata_scsi_find_dev(ap, scsidev);
2886 rc = __ata_scsi_queuecmd(cmd, done, dev);
2888 cmd->result = (DID_BAD_TARGET << 16);
2892 spin_unlock(ap->lock);
2893 spin_lock(shost->host_lock);
2898 * ata_scsi_simulate - simulate SCSI command on ATA device
2899 * @dev: the target device
2900 * @cmd: SCSI command being sent to device.
2901 * @done: SCSI command completion function.
2903 * Interprets and directly executes a select list of SCSI commands
2904 * that can be handled internally.
2907 * spin_lock_irqsave(host lock)
2910 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
2911 void (*done)(struct scsi_cmnd *))
2913 struct ata_scsi_args args;
2914 const u8 *scsicmd = cmd->cmnd;
2922 switch(scsicmd[0]) {
2923 /* no-op's, complete with success */
2924 case SYNCHRONIZE_CACHE:
2928 case TEST_UNIT_READY:
2929 case FORMAT_UNIT: /* FIXME: correct? */
2930 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2934 if (scsicmd[1] & 2) /* is CmdDt set? */
2935 ata_scsi_invalid_field(cmd, done);
2936 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2937 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2938 else switch (scsicmd[2]) {
2940 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2943 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2946 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2949 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
2952 ata_scsi_invalid_field(cmd, done);
2959 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2962 case MODE_SELECT: /* unconditionally return */
2963 case MODE_SELECT_10: /* bad-field-in-cdb */
2964 ata_scsi_invalid_field(cmd, done);
2968 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2971 case SERVICE_ACTION_IN:
2972 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2973 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2975 ata_scsi_invalid_field(cmd, done);
2979 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2983 ata_scsi_set_sense(cmd, 0, 0, 0);
2984 cmd->result = (DRIVER_SENSE << 24);
2988 case SEND_DIAGNOSTIC:
2989 tmp8 = scsicmd[1] & ~(1 << 3);
2990 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
2991 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2993 ata_scsi_invalid_field(cmd, done);
2996 /* all other commands */
2998 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2999 /* "Invalid command operation code" */
3005 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3009 for (i = 0; i < host->n_ports; i++) {
3010 struct ata_port *ap = host->ports[i];
3011 struct Scsi_Host *shost;
3014 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3018 *(struct ata_port **)&shost->hostdata[0] = ap;
3019 ap->scsi_host = shost;
3021 shost->transportt = &ata_scsi_transport_template;
3022 shost->unique_id = ap->print_id;
3025 shost->max_channel = 1;
3026 shost->max_cmd_len = 16;
3028 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3036 scsi_host_put(host->ports[i]->scsi_host);
3039 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3041 scsi_remove_host(shost);
3042 scsi_host_put(shost);
3047 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3050 struct ata_device *last_failed_dev = NULL;
3051 struct ata_link *link;
3052 struct ata_device *dev;
3054 if (ap->flags & ATA_FLAG_DISABLED)
3058 ata_port_for_each_link(link, ap) {
3059 ata_link_for_each_dev(dev, link) {
3060 struct scsi_device *sdev;
3061 int channel = 0, id = 0;
3063 if (!ata_dev_enabled(dev) || dev->sdev)
3066 if (ata_is_host_link(link))
3069 channel = link->pmp;
3071 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3073 if (!IS_ERR(sdev)) {
3075 scsi_device_put(sdev);
3080 /* If we scanned while EH was in progress or allocation
3081 * failure occurred, scan would have failed silently. Check
3082 * whether all devices are attached.
3084 ata_port_for_each_link(link, ap) {
3085 ata_link_for_each_dev(dev, link) {
3086 if (ata_dev_enabled(dev) && !dev->sdev)
3094 /* we're missing some SCSI devices */
3096 /* If caller requested synchrnous scan && we've made
3097 * any progress, sleep briefly and repeat.
3099 if (dev != last_failed_dev) {
3101 last_failed_dev = dev;
3105 /* We might be failing to detect boot device, give it
3106 * a few more chances.
3113 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3114 "failed without making any progress,\n"
3115 " switching to async\n");
3118 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3119 round_jiffies_relative(HZ));
3123 * ata_scsi_offline_dev - offline attached SCSI device
3124 * @dev: ATA device to offline attached SCSI device for
3126 * This function is called from ata_eh_hotplug() and responsible
3127 * for taking the SCSI device attached to @dev offline. This
3128 * function is called with host lock which protects dev->sdev
3132 * spin_lock_irqsave(host lock)
3135 * 1 if attached SCSI device exists, 0 otherwise.
3137 int ata_scsi_offline_dev(struct ata_device *dev)
3140 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3147 * ata_scsi_remove_dev - remove attached SCSI device
3148 * @dev: ATA device to remove attached SCSI device for
3150 * This function is called from ata_eh_scsi_hotplug() and
3151 * responsible for removing the SCSI device attached to @dev.
3154 * Kernel thread context (may sleep).
3156 static void ata_scsi_remove_dev(struct ata_device *dev)
3158 struct ata_port *ap = dev->link->ap;
3159 struct scsi_device *sdev;
3160 unsigned long flags;
3162 /* Alas, we need to grab scan_mutex to ensure SCSI device
3163 * state doesn't change underneath us and thus
3164 * scsi_device_get() always succeeds. The mutex locking can
3165 * be removed if there is __scsi_device_get() interface which
3166 * increments reference counts regardless of device state.
3168 mutex_lock(&ap->scsi_host->scan_mutex);
3169 spin_lock_irqsave(ap->lock, flags);
3171 /* clearing dev->sdev is protected by host lock */
3176 /* If user initiated unplug races with us, sdev can go
3177 * away underneath us after the host lock and
3178 * scan_mutex are released. Hold onto it.
3180 if (scsi_device_get(sdev) == 0) {
3181 /* The following ensures the attached sdev is
3182 * offline on return from ata_scsi_offline_dev()
3183 * regardless it wins or loses the race
3184 * against this function.
3186 scsi_device_set_state(sdev, SDEV_OFFLINE);
3193 spin_unlock_irqrestore(ap->lock, flags);
3194 mutex_unlock(&ap->scsi_host->scan_mutex);
3197 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3198 sdev->sdev_gendev.bus_id);
3200 scsi_remove_device(sdev);
3201 scsi_device_put(sdev);
3205 static void ata_scsi_handle_link_detach(struct ata_link *link)
3207 struct ata_port *ap = link->ap;
3208 struct ata_device *dev;
3210 ata_link_for_each_dev(dev, link) {
3211 unsigned long flags;
3213 if (!(dev->flags & ATA_DFLAG_DETACHED))
3216 spin_lock_irqsave(ap->lock, flags);
3217 dev->flags &= ~ATA_DFLAG_DETACHED;
3218 spin_unlock_irqrestore(ap->lock, flags);
3220 ata_scsi_remove_dev(dev);
3225 * ata_scsi_media_change_notify - send media change event
3226 * @atadev: Pointer to the disk device with media change event
3228 * Tell the block layer to send a media change notification
3232 * interrupt context, may not sleep.
3234 void ata_scsi_media_change_notify(struct ata_device *atadev)
3236 #ifdef OTHER_AN_PATCHES_HAVE_BEEN_APPLIED
3237 scsi_device_event_notify(atadev->sdev, SDEV_MEDIA_CHANGE);
3240 EXPORT_SYMBOL_GPL(ata_scsi_media_change_notify);
3243 * ata_scsi_hotplug - SCSI part of hotplug
3244 * @work: Pointer to ATA port to perform SCSI hotplug on
3246 * Perform SCSI part of hotplug. It's executed from a separate
3247 * workqueue after EH completes. This is necessary because SCSI
3248 * hot plugging requires working EH and hot unplugging is
3249 * synchronized with hot plugging with a mutex.
3252 * Kernel thread context (may sleep).
3254 void ata_scsi_hotplug(struct work_struct *work)
3256 struct ata_port *ap =
3257 container_of(work, struct ata_port, hotplug_task.work);
3260 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3261 DPRINTK("ENTER/EXIT - unloading\n");
3267 /* Unplug detached devices. We cannot use link iterator here
3268 * because PMP links have to be scanned even if PMP is
3269 * currently not attached. Iterate manually.
3271 ata_scsi_handle_link_detach(&ap->link);
3273 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3274 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3276 /* scan for new ones */
3277 ata_scsi_scan_host(ap, 0);
3283 * ata_scsi_user_scan - indication for user-initiated bus scan
3284 * @shost: SCSI host to scan
3285 * @channel: Channel to scan
3289 * This function is called when user explicitly requests bus
3290 * scan. Set probe pending flag and invoke EH.
3293 * SCSI layer (we don't care)
3298 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3299 unsigned int id, unsigned int lun)
3301 struct ata_port *ap = ata_shost_to_port(shost);
3302 unsigned long flags;
3305 if (!ap->ops->error_handler)
3308 if (lun != SCAN_WILD_CARD && lun)
3311 if (ap->nr_pmp_links == 0) {
3312 if (channel != SCAN_WILD_CARD && channel)
3316 if (id != SCAN_WILD_CARD && id)
3321 spin_lock_irqsave(ap->lock, flags);
3323 if (devno == SCAN_WILD_CARD) {
3324 struct ata_link *link;
3326 ata_port_for_each_link(link, ap) {
3327 struct ata_eh_info *ehi = &link->eh_info;
3328 ehi->probe_mask |= (1 << ata_link_max_devices(link)) - 1;
3329 ehi->action |= ATA_EH_SOFTRESET;
3332 struct ata_device *dev = ata_find_dev(ap, devno);
3335 struct ata_eh_info *ehi = &dev->link->eh_info;
3336 ehi->probe_mask |= 1 << dev->devno;
3337 ehi->action |= ATA_EH_SOFTRESET;
3338 ehi->flags |= ATA_EHI_RESUME_LINK;
3344 ata_port_schedule_eh(ap);
3345 spin_unlock_irqrestore(ap->lock, flags);
3346 ata_port_wait_eh(ap);
3348 spin_unlock_irqrestore(ap->lock, flags);
3354 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3355 * @work: Pointer to ATA port to perform scsi_rescan_device()
3357 * After ATA pass thru (SAT) commands are executed successfully,
3358 * libata need to propagate the changes to SCSI layer. This
3359 * function must be executed from ata_aux_wq such that sdev
3360 * attach/detach don't race with rescan.
3363 * Kernel thread context (may sleep).
3365 void ata_scsi_dev_rescan(struct work_struct *work)
3367 struct ata_port *ap =
3368 container_of(work, struct ata_port, scsi_rescan_task);
3369 struct ata_link *link;
3370 struct ata_device *dev;
3371 unsigned long flags;
3373 spin_lock_irqsave(ap->lock, flags);
3375 ata_port_for_each_link(link, ap) {
3376 ata_link_for_each_dev(dev, link) {
3377 struct scsi_device *sdev = dev->sdev;
3379 if (!ata_dev_enabled(dev) || !sdev)
3381 if (scsi_device_get(sdev))
3384 spin_unlock_irqrestore(ap->lock, flags);
3385 scsi_rescan_device(&(sdev->sdev_gendev));
3386 scsi_device_put(sdev);
3387 spin_lock_irqsave(ap->lock, flags);
3391 spin_unlock_irqrestore(ap->lock, flags);
3395 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3396 * @host: ATA host container for all SAS ports
3397 * @port_info: Information from low-level host driver
3398 * @shost: SCSI host that the scsi device is attached to
3401 * PCI/etc. bus probe sem.
3404 * ata_port pointer on success / NULL on failure.
3407 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3408 struct ata_port_info *port_info,
3409 struct Scsi_Host *shost)
3411 struct ata_port *ap;
3413 ap = ata_port_alloc(host);
3418 ap->lock = shost->host_lock;
3419 ap->pio_mask = port_info->pio_mask;
3420 ap->mwdma_mask = port_info->mwdma_mask;
3421 ap->udma_mask = port_info->udma_mask;
3422 ap->flags |= port_info->flags;
3423 ap->ops = port_info->port_ops;
3424 ap->cbl = ATA_CBL_SATA;
3428 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3431 * ata_sas_port_start - Set port up for dma.
3432 * @ap: Port to initialize
3434 * Called just after data structures for each port are
3435 * initialized. Allocates DMA pad.
3437 * May be used as the port_start() entry in ata_port_operations.
3440 * Inherited from caller.
3442 int ata_sas_port_start(struct ata_port *ap)
3444 return ata_pad_alloc(ap, ap->dev);
3446 EXPORT_SYMBOL_GPL(ata_sas_port_start);
3449 * ata_port_stop - Undo ata_sas_port_start()
3450 * @ap: Port to shut down
3452 * Frees the DMA pad.
3454 * May be used as the port_stop() entry in ata_port_operations.
3457 * Inherited from caller.
3460 void ata_sas_port_stop(struct ata_port *ap)
3462 ata_pad_free(ap, ap->dev);
3464 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3467 * ata_sas_port_init - Initialize a SATA device
3468 * @ap: SATA port to initialize
3471 * PCI/etc. bus probe sem.
3474 * Zero on success, non-zero on error.
3477 int ata_sas_port_init(struct ata_port *ap)
3479 int rc = ap->ops->port_start(ap);
3482 ap->print_id = ata_print_id++;
3483 rc = ata_bus_probe(ap);
3488 EXPORT_SYMBOL_GPL(ata_sas_port_init);
3491 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3492 * @ap: SATA port to destroy
3496 void ata_sas_port_destroy(struct ata_port *ap)
3498 if (ap->ops->port_stop)
3499 ap->ops->port_stop(ap);
3502 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3505 * ata_sas_slave_configure - Default slave_config routine for libata devices
3506 * @sdev: SCSI device to configure
3507 * @ap: ATA port to which SCSI device is attached
3513 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3515 ata_scsi_sdev_config(sdev);
3516 ata_scsi_dev_config(sdev, ap->link.device);
3519 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3522 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3523 * @cmd: SCSI command to be sent
3524 * @done: Completion function, called when command is complete
3525 * @ap: ATA port to which the command is being sent
3528 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3532 int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3533 struct ata_port *ap)
3537 ata_scsi_dump_cdb(ap, cmd);
3539 if (likely(ata_scsi_dev_enabled(ap->link.device)))
3540 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
3542 cmd->result = (DID_BAD_TARGET << 16);
3547 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);