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 <linux/uaccess.h>
52 #define SECTOR_SIZE 512
53 #define ATA_SCSI_RBUF_SIZE 4096
55 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
56 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
58 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
60 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
61 const struct scsi_device *scsidev);
62 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
63 const struct scsi_device *scsidev);
64 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
65 unsigned int id, unsigned int lun);
68 #define RW_RECOVERY_MPAGE 0x1
69 #define RW_RECOVERY_MPAGE_LEN 12
70 #define CACHE_MPAGE 0x8
71 #define CACHE_MPAGE_LEN 20
72 #define CONTROL_MPAGE 0xa
73 #define CONTROL_MPAGE_LEN 12
74 #define ALL_MPAGES 0x3f
75 #define ALL_SUB_MPAGES 0xff
78 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
80 RW_RECOVERY_MPAGE_LEN - 2,
82 0, /* read retry count */
84 0, /* write retry count */
88 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
91 0, /* contains WCE, needs to be 0 for logic */
92 0, 0, 0, 0, 0, 0, 0, 0, 0,
93 0, /* contains DRA, needs to be 0 for logic */
97 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
99 CONTROL_MPAGE_LEN - 2,
100 2, /* DSENSE=0, GLTSD=1 */
101 0, /* [QAM+QERR may be 1, see 05-359r1] */
102 0, 0, 0, 0, 0xff, 0xff,
103 0, 30 /* extended self test time, see 05-359r1 */
107 * libata transport template. libata doesn't do real transport stuff.
108 * It just needs the eh_timed_out hook.
110 static struct scsi_transport_template ata_scsi_transport_template = {
111 .eh_strategy_handler = ata_scsi_error,
112 .eh_timed_out = ata_scsi_timed_out,
113 .user_scan = ata_scsi_user_scan,
117 static const struct {
120 } link_pm_policy[] = {
121 { NOT_AVAILABLE, "max_performance" },
122 { MIN_POWER, "min_power" },
123 { MAX_PERFORMANCE, "max_performance" },
124 { MEDIUM_POWER, "medium_power" },
127 static const char *ata_scsi_lpm_get(enum link_pm policy)
131 for (i = 0; i < ARRAY_SIZE(link_pm_policy); i++)
132 if (link_pm_policy[i].value == policy)
133 return link_pm_policy[i].name;
138 static ssize_t ata_scsi_lpm_put(struct device *dev,
139 struct device_attribute *attr,
140 const char *buf, size_t count)
142 struct Scsi_Host *shost = class_to_shost(dev);
143 struct ata_port *ap = ata_shost_to_port(shost);
144 enum link_pm policy = 0;
148 * we are skipping array location 0 on purpose - this
149 * is because a value of NOT_AVAILABLE is displayed
150 * to the user as max_performance, but when the user
151 * writes "max_performance", they actually want the
152 * value to match MAX_PERFORMANCE.
154 for (i = 1; i < ARRAY_SIZE(link_pm_policy); i++) {
155 const int len = strlen(link_pm_policy[i].name);
156 if (strncmp(link_pm_policy[i].name, buf, len) == 0 &&
158 policy = link_pm_policy[i].value;
165 ata_lpm_schedule(ap, policy);
170 ata_scsi_lpm_show(struct device *dev, struct device_attribute *attr, char *buf)
172 struct Scsi_Host *shost = class_to_shost(dev);
173 struct ata_port *ap = ata_shost_to_port(shost);
175 ata_scsi_lpm_get(ap->pm_policy);
180 return snprintf(buf, 23, "%s\n", policy);
182 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
183 ata_scsi_lpm_show, ata_scsi_lpm_put);
184 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
186 static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
188 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
190 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
193 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
194 void (*done)(struct scsi_cmnd *))
196 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
197 /* "Invalid field in cbd" */
202 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
203 * @sdev: SCSI device for which BIOS geometry is to be determined
204 * @bdev: block device associated with @sdev
205 * @capacity: capacity of SCSI device
206 * @geom: location to which geometry will be output
208 * Generic bios head/sector/cylinder calculator
209 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
210 * mapping. Some situations may arise where the disk is not
211 * bootable if this is not used.
214 * Defined by the SCSI layer. We don't really care.
219 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
220 sector_t capacity, int geom[])
224 sector_div(capacity, 255*63);
231 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
232 * @sdev: SCSI device to get identify data for
233 * @arg: User buffer area for identify data
236 * Defined by the SCSI layer. We don't really care.
239 * Zero on success, negative errno on error.
241 static int ata_get_identity(struct scsi_device *sdev, void __user *arg)
243 struct ata_port *ap = ata_shost_to_port(sdev->host);
244 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
245 u16 __user *dst = arg;
251 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
254 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
255 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
258 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
259 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
262 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
263 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
270 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
271 * @scsidev: Device to which we are issuing command
272 * @arg: User provided data for issuing command
275 * Defined by the SCSI layer. We don't really care.
278 * Zero on success, negative errno on error.
280 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
283 u8 scsi_cmd[MAX_COMMAND_SIZE];
284 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
286 enum dma_data_direction data_dir;
292 if (copy_from_user(args, arg, sizeof(args)))
295 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
299 memset(scsi_cmd, 0, sizeof(scsi_cmd));
302 argsize = SECTOR_SIZE * args[3];
303 argbuf = kmalloc(argsize, GFP_KERNEL);
304 if (argbuf == NULL) {
309 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
310 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
311 block count in sector count field */
312 data_dir = DMA_FROM_DEVICE;
314 scsi_cmd[1] = (3 << 1); /* Non-data */
315 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
319 scsi_cmd[0] = ATA_16;
321 scsi_cmd[4] = args[2];
322 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
323 scsi_cmd[6] = args[3];
324 scsi_cmd[8] = args[1];
328 scsi_cmd[6] = args[1];
330 scsi_cmd[14] = args[0];
332 /* Good values for timeout and retries? Values below
333 from scsi_ioctl_send_command() for default case... */
334 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
335 sensebuf, (10*HZ), 5, 0);
337 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
338 u8 *desc = sensebuf + 8;
339 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
341 /* If we set cc then ATA pass-through will cause a
342 * check condition even if no error. Filter that. */
343 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
344 struct scsi_sense_hdr sshdr;
345 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
347 if (sshdr.sense_key == 0 &&
348 sshdr.asc == 0 && sshdr.ascq == 0)
349 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
352 /* Send userspace a few ATA registers (same as drivers/ide) */
353 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
354 desc[0] == 0x09) { /* code is "ATA Descriptor" */
355 args[0] = desc[13]; /* status */
356 args[1] = desc[3]; /* error */
357 args[2] = desc[5]; /* sector count (0:7) */
358 if (copy_to_user(arg, args, sizeof(args)))
370 && copy_to_user(arg + sizeof(args), argbuf, argsize))
379 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
380 * @scsidev: Device to which we are issuing command
381 * @arg: User provided data for issuing command
384 * Defined by the SCSI layer. We don't really care.
387 * Zero on success, negative errno on error.
389 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
392 u8 scsi_cmd[MAX_COMMAND_SIZE];
393 u8 args[7], *sensebuf = NULL;
399 if (copy_from_user(args, arg, sizeof(args)))
402 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
406 memset(scsi_cmd, 0, sizeof(scsi_cmd));
407 scsi_cmd[0] = ATA_16;
408 scsi_cmd[1] = (3 << 1); /* Non-data */
409 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
410 scsi_cmd[4] = args[1];
411 scsi_cmd[6] = args[2];
412 scsi_cmd[8] = args[3];
413 scsi_cmd[10] = args[4];
414 scsi_cmd[12] = args[5];
415 scsi_cmd[13] = args[6] & 0x4f;
416 scsi_cmd[14] = args[0];
418 /* Good values for timeout and retries? Values below
419 from scsi_ioctl_send_command() for default case... */
420 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
421 sensebuf, (10*HZ), 5, 0);
423 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
424 u8 *desc = sensebuf + 8;
425 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
427 /* If we set cc then ATA pass-through will cause a
428 * check condition even if no error. Filter that. */
429 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
430 struct scsi_sense_hdr sshdr;
431 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
433 if (sshdr.sense_key == 0 &&
434 sshdr.asc == 0 && sshdr.ascq == 0)
435 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
438 /* Send userspace ATA registers */
439 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
440 desc[0] == 0x09) {/* code is "ATA Descriptor" */
441 args[0] = desc[13]; /* status */
442 args[1] = desc[3]; /* error */
443 args[2] = desc[5]; /* sector count (0:7) */
444 args[3] = desc[7]; /* lbal */
445 args[4] = desc[9]; /* lbam */
446 args[5] = desc[11]; /* lbah */
447 args[6] = desc[12]; /* select */
448 if (copy_to_user(arg, args, sizeof(args)))
463 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
465 int val = -EINVAL, rc = -EINVAL;
468 case ATA_IOC_GET_IO32:
470 if (copy_to_user(arg, &val, 1))
474 case ATA_IOC_SET_IO32:
475 val = (unsigned long) arg;
480 case HDIO_GET_IDENTITY:
481 return ata_get_identity(scsidev, arg);
484 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
486 return ata_cmd_ioctl(scsidev, arg);
488 case HDIO_DRIVE_TASK:
489 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
491 return ata_task_ioctl(scsidev, arg);
502 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
503 * @dev: ATA device to which the new command is attached
504 * @cmd: SCSI command that originated this ATA command
505 * @done: SCSI command completion function
507 * Obtain a reference to an unused ata_queued_cmd structure,
508 * which is the basic libata structure representing a single
509 * ATA command sent to the hardware.
511 * If a command was available, fill in the SCSI-specific
512 * portions of the structure with information on the
516 * spin_lock_irqsave(host lock)
519 * Command allocated, or %NULL if none available.
521 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
522 struct scsi_cmnd *cmd,
523 void (*done)(struct scsi_cmnd *))
525 struct ata_queued_cmd *qc;
527 qc = ata_qc_new_init(dev);
532 qc->sg = scsi_sglist(cmd);
533 qc->n_elem = scsi_sg_count(cmd);
535 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
542 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
544 struct scsi_cmnd *scmd = qc->scsicmd;
546 qc->extrabytes = scmd->request->extra_len;
547 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
551 * ata_dump_status - user friendly display of error info
552 * @id: id of the port in question
553 * @tf: ptr to filled out taskfile
555 * Decode and dump the ATA error/status registers for the user so
556 * that they have some idea what really happened at the non
557 * make-believe layer.
560 * inherited from caller
562 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
564 u8 stat = tf->command, err = tf->feature;
566 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
567 if (stat & ATA_BUSY) {
568 printk("Busy }\n"); /* Data is not valid in this case */
570 if (stat & 0x40) printk("DriveReady ");
571 if (stat & 0x20) printk("DeviceFault ");
572 if (stat & 0x10) printk("SeekComplete ");
573 if (stat & 0x08) printk("DataRequest ");
574 if (stat & 0x04) printk("CorrectedError ");
575 if (stat & 0x02) printk("Index ");
576 if (stat & 0x01) printk("Error ");
580 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
581 if (err & 0x04) printk("DriveStatusError ");
583 if (err & 0x04) printk("BadCRC ");
584 else printk("Sector ");
586 if (err & 0x40) printk("UncorrectableError ");
587 if (err & 0x10) printk("SectorIdNotFound ");
588 if (err & 0x02) printk("TrackZeroNotFound ");
589 if (err & 0x01) printk("AddrMarkNotFound ");
596 * ata_to_sense_error - convert ATA error to SCSI error
597 * @id: ATA device number
598 * @drv_stat: value contained in ATA status register
599 * @drv_err: value contained in ATA error register
600 * @sk: the sense key we'll fill out
601 * @asc: the additional sense code we'll fill out
602 * @ascq: the additional sense code qualifier we'll fill out
603 * @verbose: be verbose
605 * Converts an ATA error into a SCSI error. Fill out pointers to
606 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
607 * format sense blocks.
610 * spin_lock_irqsave(host lock)
612 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
613 u8 *asc, u8 *ascq, int verbose)
617 /* Based on the 3ware driver translation table */
618 static const unsigned char sense_table[][4] = {
620 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
622 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
624 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
625 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
626 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
627 /* MC|ID|ABRT|TRK0|MARK */
628 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
630 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
631 /* Bad address mark */
632 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
634 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
636 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
637 /* Media change request */
638 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
640 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
642 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
644 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
645 /* BBD - block marked bad */
646 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
647 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
649 static const unsigned char stat_table[][4] = {
650 /* Must be first because BUSY means no other bits valid */
651 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
652 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
653 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
654 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
655 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
659 * Is this an error we can process/parse
661 if (drv_stat & ATA_BUSY) {
662 drv_err = 0; /* Ignore the err bits, they're invalid */
666 /* Look for drv_err */
667 for (i = 0; sense_table[i][0] != 0xFF; i++) {
668 /* Look for best matches first */
669 if ((sense_table[i][0] & drv_err) ==
671 *sk = sense_table[i][1];
672 *asc = sense_table[i][2];
673 *ascq = sense_table[i][3];
677 /* No immediate match */
679 printk(KERN_WARNING "ata%u: no sense translation for "
680 "error 0x%02x\n", id, drv_err);
683 /* Fall back to interpreting status bits */
684 for (i = 0; stat_table[i][0] != 0xFF; i++) {
685 if (stat_table[i][0] & drv_stat) {
686 *sk = stat_table[i][1];
687 *asc = stat_table[i][2];
688 *ascq = stat_table[i][3];
692 /* No error? Undecoded? */
694 printk(KERN_WARNING "ata%u: no sense translation for "
695 "status: 0x%02x\n", id, drv_stat);
697 /* We need a sensible error return here, which is tricky, and one
698 that won't cause people to do things like return a disk wrongly */
699 *sk = ABORTED_COMMAND;
705 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
706 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
707 id, drv_stat, drv_err, *sk, *asc, *ascq);
712 * ata_gen_passthru_sense - Generate check condition sense block.
713 * @qc: Command that completed.
715 * This function is specific to the ATA descriptor format sense
716 * block specified for the ATA pass through commands. Regardless
717 * of whether the command errored or not, return a sense
718 * block. Copy all controller registers into the sense
719 * block. Clear sense key, ASC & ASCQ if there is no error.
724 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
726 struct scsi_cmnd *cmd = qc->scsicmd;
727 struct ata_taskfile *tf = &qc->result_tf;
728 unsigned char *sb = cmd->sense_buffer;
729 unsigned char *desc = sb + 8;
730 int verbose = qc->ap->ops->error_handler == NULL;
732 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
734 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
737 * Use ata_to_sense_error() to map status register bits
738 * onto sense key, asc & ascq.
741 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
742 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
743 &sb[1], &sb[2], &sb[3], verbose);
748 * Sense data is current and format is descriptor.
754 /* set length of additional sense data */
759 * Copy registers into sense buffer.
762 desc[3] = tf->feature; /* == error reg */
767 desc[12] = tf->device;
768 desc[13] = tf->command; /* == status reg */
771 * Fill in Extend bit, and the high order bytes
774 if (tf->flags & ATA_TFLAG_LBA48) {
776 desc[4] = tf->hob_nsect;
777 desc[6] = tf->hob_lbal;
778 desc[8] = tf->hob_lbam;
779 desc[10] = tf->hob_lbah;
784 * ata_gen_ata_sense - generate a SCSI fixed sense block
785 * @qc: Command that we are erroring out
787 * Generate sense block for a failed ATA command @qc. Descriptor
788 * format is used to accomodate LBA48 block address.
793 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
795 struct ata_device *dev = qc->dev;
796 struct scsi_cmnd *cmd = qc->scsicmd;
797 struct ata_taskfile *tf = &qc->result_tf;
798 unsigned char *sb = cmd->sense_buffer;
799 unsigned char *desc = sb + 8;
800 int verbose = qc->ap->ops->error_handler == NULL;
803 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
805 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
807 /* sense data is current and format is descriptor */
810 /* Use ata_to_sense_error() to map status register bits
811 * onto sense key, asc & ascq.
814 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
815 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
816 &sb[1], &sb[2], &sb[3], verbose);
820 block = ata_tf_read_block(&qc->result_tf, dev);
822 /* information sense data descriptor */
827 desc[2] |= 0x80; /* valid */
828 desc[6] = block >> 40;
829 desc[7] = block >> 32;
830 desc[8] = block >> 24;
831 desc[9] = block >> 16;
832 desc[10] = block >> 8;
836 static void ata_scsi_sdev_config(struct scsi_device *sdev)
838 sdev->use_10_for_rw = 1;
839 sdev->use_10_for_ms = 1;
841 /* Schedule policy is determined by ->qc_defer() callback and
842 * it needs to see every deferred qc. Set dev_blocked to 1 to
843 * prevent SCSI midlayer from automatically deferring
846 sdev->max_device_blocked = 1;
850 * atapi_drain_needed - Check whether data transfer may overflow
851 * @rq: request to be checked
853 * ATAPI commands which transfer variable length data to host
854 * might overflow due to application error or hardare bug. This
855 * function checks whether overflow should be drained and ignored
862 * 1 if ; otherwise, 0.
864 static int atapi_drain_needed(struct request *rq)
866 if (likely(!blk_pc_request(rq)))
869 if (!rq->data_len || (rq->cmd_flags & REQ_RW))
872 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
875 static int ata_scsi_dev_config(struct scsi_device *sdev,
876 struct ata_device *dev)
878 /* configure max sectors */
879 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
881 if (dev->class == ATA_DEV_ATAPI) {
882 struct request_queue *q = sdev->request_queue;
885 /* set the min alignment and padding */
886 blk_queue_update_dma_alignment(sdev->request_queue,
888 blk_queue_dma_pad(sdev->request_queue, ATA_DMA_PAD_SZ - 1);
890 /* configure draining */
891 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
893 ata_dev_printk(dev, KERN_ERR,
894 "drain buffer allocation failed\n");
898 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
900 /* ATA devices must be sector aligned */
901 blk_queue_update_dma_alignment(sdev->request_queue,
903 sdev->manage_start_stop = 1;
906 if (dev->flags & ATA_DFLAG_AN)
907 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
909 if (dev->flags & ATA_DFLAG_NCQ) {
912 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
913 depth = min(ATA_MAX_QUEUE - 1, depth);
914 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
921 * ata_scsi_slave_config - Set SCSI device attributes
922 * @sdev: SCSI device to examine
924 * This is called before we actually start reading
925 * and writing to the device, to configure certain
926 * SCSI mid-layer behaviors.
929 * Defined by SCSI layer. We don't really care.
932 int ata_scsi_slave_config(struct scsi_device *sdev)
934 struct ata_port *ap = ata_shost_to_port(sdev->host);
935 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
938 ata_scsi_sdev_config(sdev);
941 rc = ata_scsi_dev_config(sdev, dev);
947 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
948 * @sdev: SCSI device to be destroyed
950 * @sdev is about to be destroyed for hot/warm unplugging. If
951 * this unplugging was initiated by libata as indicated by NULL
952 * dev->sdev, this function doesn't have to do anything.
953 * Otherwise, SCSI layer initiated warm-unplug is in progress.
954 * Clear dev->sdev, schedule the device for ATA detach and invoke
958 * Defined by SCSI layer. We don't really care.
960 void ata_scsi_slave_destroy(struct scsi_device *sdev)
962 struct ata_port *ap = ata_shost_to_port(sdev->host);
963 struct request_queue *q = sdev->request_queue;
965 struct ata_device *dev;
967 if (!ap->ops->error_handler)
970 spin_lock_irqsave(ap->lock, flags);
971 dev = __ata_scsi_find_dev(ap, sdev);
972 if (dev && dev->sdev) {
973 /* SCSI device already in CANCEL state, no need to offline it */
975 dev->flags |= ATA_DFLAG_DETACH;
976 ata_port_schedule_eh(ap);
978 spin_unlock_irqrestore(ap->lock, flags);
980 kfree(q->dma_drain_buffer);
981 q->dma_drain_buffer = NULL;
982 q->dma_drain_size = 0;
986 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
987 * @sdev: SCSI device to configure queue depth for
988 * @queue_depth: new queue depth
990 * This is libata standard hostt->change_queue_depth callback.
991 * SCSI will call into this callback when user tries to set queue
995 * SCSI layer (we don't care)
998 * Newly configured queue depth.
1000 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1002 struct ata_port *ap = ata_shost_to_port(sdev->host);
1003 struct ata_device *dev;
1004 unsigned long flags;
1006 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1007 return sdev->queue_depth;
1009 dev = ata_scsi_find_dev(ap, sdev);
1010 if (!dev || !ata_dev_enabled(dev))
1011 return sdev->queue_depth;
1014 spin_lock_irqsave(ap->lock, flags);
1015 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1016 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1017 dev->flags |= ATA_DFLAG_NCQ_OFF;
1020 spin_unlock_irqrestore(ap->lock, flags);
1022 /* limit and apply queue depth */
1023 queue_depth = min(queue_depth, sdev->host->can_queue);
1024 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1025 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1027 if (sdev->queue_depth == queue_depth)
1030 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
1034 /* XXX: for spindown warning */
1035 static void ata_delayed_done_timerfn(unsigned long arg)
1037 struct scsi_cmnd *scmd = (void *)arg;
1039 scmd->scsi_done(scmd);
1042 /* XXX: for spindown warning */
1043 static void ata_delayed_done(struct scsi_cmnd *scmd)
1045 static struct timer_list timer;
1047 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
1048 mod_timer(&timer, jiffies + 5 * HZ);
1052 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1053 * @qc: Storage for translated ATA taskfile
1055 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1056 * (to start). Perhaps these commands should be preceded by
1057 * CHECK POWER MODE to see what power mode the device is already in.
1058 * [See SAT revision 5 at www.t10.org]
1061 * spin_lock_irqsave(host lock)
1064 * Zero on success, non-zero on error.
1066 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1068 struct scsi_cmnd *scmd = qc->scsicmd;
1069 struct ata_taskfile *tf = &qc->tf;
1070 const u8 *cdb = scmd->cmnd;
1072 if (scmd->cmd_len < 5)
1075 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1076 tf->protocol = ATA_PROT_NODATA;
1078 ; /* ignore IMMED bit, violates sat-r05 */
1081 goto invalid_fld; /* LOEJ bit set not supported */
1082 if (((cdb[4] >> 4) & 0xf) != 0)
1083 goto invalid_fld; /* power conditions not supported */
1086 tf->nsect = 1; /* 1 sector, lba=0 */
1088 if (qc->dev->flags & ATA_DFLAG_LBA) {
1089 tf->flags |= ATA_TFLAG_LBA;
1094 tf->device |= ATA_LBA;
1097 tf->lbal = 0x1; /* sect */
1098 tf->lbam = 0x0; /* cyl low */
1099 tf->lbah = 0x0; /* cyl high */
1102 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1104 /* XXX: This is for backward compatibility, will be
1105 * removed. Read Documentation/feature-removal-schedule.txt
1108 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
1109 (system_state == SYSTEM_HALT ||
1110 system_state == SYSTEM_POWER_OFF)) {
1111 static unsigned long warned;
1113 if (!test_and_set_bit(0, &warned)) {
1114 ata_dev_printk(qc->dev, KERN_WARNING,
1115 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
1116 "UPDATE SHUTDOWN UTILITY\n");
1117 ata_dev_printk(qc->dev, KERN_WARNING,
1118 "For more info, visit "
1119 "http://linux-ata.org/shutdown.html\n");
1121 /* ->scsi_done is not used, use it for
1122 * delayed completion.
1124 scmd->scsi_done = qc->scsidone;
1125 qc->scsidone = ata_delayed_done;
1127 scmd->result = SAM_STAT_GOOD;
1131 /* Issue ATA STANDBY IMMEDIATE command */
1132 tf->command = ATA_CMD_STANDBYNOW1;
1136 * Standby and Idle condition timers could be implemented but that
1137 * would require libata to implement the Power condition mode page
1138 * and allow the user to change it. Changing mode pages requires
1139 * MODE SELECT to be implemented.
1145 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1146 /* "Invalid field in cbd" */
1152 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1153 * @qc: Storage for translated ATA taskfile
1155 * Sets up an ATA taskfile to issue FLUSH CACHE or
1159 * spin_lock_irqsave(host lock)
1162 * Zero on success, non-zero on error.
1164 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1166 struct ata_taskfile *tf = &qc->tf;
1168 tf->flags |= ATA_TFLAG_DEVICE;
1169 tf->protocol = ATA_PROT_NODATA;
1171 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1172 tf->command = ATA_CMD_FLUSH_EXT;
1174 tf->command = ATA_CMD_FLUSH;
1176 /* flush is critical for IO integrity, consider it an IO command */
1177 qc->flags |= ATA_QCFLAG_IO;
1183 * scsi_6_lba_len - Get LBA and transfer length
1184 * @cdb: SCSI command to translate
1186 * Calculate LBA and transfer length for 6-byte commands.
1190 * @plen: the transfer length
1192 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1197 VPRINTK("six-byte command\n");
1199 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1200 lba |= ((u64)cdb[2]) << 8;
1201 lba |= ((u64)cdb[3]);
1210 * scsi_10_lba_len - Get LBA and transfer length
1211 * @cdb: SCSI command to translate
1213 * Calculate LBA and transfer length for 10-byte commands.
1217 * @plen: the transfer length
1219 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1224 VPRINTK("ten-byte command\n");
1226 lba |= ((u64)cdb[2]) << 24;
1227 lba |= ((u64)cdb[3]) << 16;
1228 lba |= ((u64)cdb[4]) << 8;
1229 lba |= ((u64)cdb[5]);
1231 len |= ((u32)cdb[7]) << 8;
1232 len |= ((u32)cdb[8]);
1239 * scsi_16_lba_len - Get LBA and transfer length
1240 * @cdb: SCSI command to translate
1242 * Calculate LBA and transfer length for 16-byte commands.
1246 * @plen: the transfer length
1248 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1253 VPRINTK("sixteen-byte command\n");
1255 lba |= ((u64)cdb[2]) << 56;
1256 lba |= ((u64)cdb[3]) << 48;
1257 lba |= ((u64)cdb[4]) << 40;
1258 lba |= ((u64)cdb[5]) << 32;
1259 lba |= ((u64)cdb[6]) << 24;
1260 lba |= ((u64)cdb[7]) << 16;
1261 lba |= ((u64)cdb[8]) << 8;
1262 lba |= ((u64)cdb[9]);
1264 len |= ((u32)cdb[10]) << 24;
1265 len |= ((u32)cdb[11]) << 16;
1266 len |= ((u32)cdb[12]) << 8;
1267 len |= ((u32)cdb[13]);
1274 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1275 * @qc: Storage for translated ATA taskfile
1277 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1280 * spin_lock_irqsave(host lock)
1283 * Zero on success, non-zero on error.
1285 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1287 struct scsi_cmnd *scmd = qc->scsicmd;
1288 struct ata_taskfile *tf = &qc->tf;
1289 struct ata_device *dev = qc->dev;
1290 u64 dev_sectors = qc->dev->n_sectors;
1291 const u8 *cdb = scmd->cmnd;
1295 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1296 tf->protocol = ATA_PROT_NODATA;
1298 if (cdb[0] == VERIFY) {
1299 if (scmd->cmd_len < 10)
1301 scsi_10_lba_len(cdb, &block, &n_block);
1302 } else if (cdb[0] == VERIFY_16) {
1303 if (scmd->cmd_len < 16)
1305 scsi_16_lba_len(cdb, &block, &n_block);
1311 if (block >= dev_sectors)
1313 if ((block + n_block) > dev_sectors)
1316 if (dev->flags & ATA_DFLAG_LBA) {
1317 tf->flags |= ATA_TFLAG_LBA;
1319 if (lba_28_ok(block, n_block)) {
1321 tf->command = ATA_CMD_VERIFY;
1322 tf->device |= (block >> 24) & 0xf;
1323 } else if (lba_48_ok(block, n_block)) {
1324 if (!(dev->flags & ATA_DFLAG_LBA48))
1328 tf->flags |= ATA_TFLAG_LBA48;
1329 tf->command = ATA_CMD_VERIFY_EXT;
1331 tf->hob_nsect = (n_block >> 8) & 0xff;
1333 tf->hob_lbah = (block >> 40) & 0xff;
1334 tf->hob_lbam = (block >> 32) & 0xff;
1335 tf->hob_lbal = (block >> 24) & 0xff;
1337 /* request too large even for LBA48 */
1340 tf->nsect = n_block & 0xff;
1342 tf->lbah = (block >> 16) & 0xff;
1343 tf->lbam = (block >> 8) & 0xff;
1344 tf->lbal = block & 0xff;
1346 tf->device |= ATA_LBA;
1349 u32 sect, head, cyl, track;
1351 if (!lba_28_ok(block, n_block))
1354 /* Convert LBA to CHS */
1355 track = (u32)block / dev->sectors;
1356 cyl = track / dev->heads;
1357 head = track % dev->heads;
1358 sect = (u32)block % dev->sectors + 1;
1360 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1361 (u32)block, track, cyl, head, sect);
1363 /* Check whether the converted CHS can fit.
1367 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1370 tf->command = ATA_CMD_VERIFY;
1371 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1374 tf->lbah = cyl >> 8;
1381 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1382 /* "Invalid field in cbd" */
1386 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1387 /* "Logical Block Address out of range" */
1391 scmd->result = SAM_STAT_GOOD;
1396 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1397 * @qc: Storage for translated ATA taskfile
1399 * Converts any of six SCSI read/write commands into the
1400 * ATA counterpart, including starting sector (LBA),
1401 * sector count, and taking into account the device's LBA48
1404 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1405 * %WRITE_16 are currently supported.
1408 * spin_lock_irqsave(host lock)
1411 * Zero on success, non-zero on error.
1413 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1415 struct scsi_cmnd *scmd = qc->scsicmd;
1416 const u8 *cdb = scmd->cmnd;
1417 unsigned int tf_flags = 0;
1422 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1423 tf_flags |= ATA_TFLAG_WRITE;
1425 /* Calculate the SCSI LBA, transfer length and FUA. */
1429 if (unlikely(scmd->cmd_len < 10))
1431 scsi_10_lba_len(cdb, &block, &n_block);
1432 if (unlikely(cdb[1] & (1 << 3)))
1433 tf_flags |= ATA_TFLAG_FUA;
1437 if (unlikely(scmd->cmd_len < 6))
1439 scsi_6_lba_len(cdb, &block, &n_block);
1441 /* for 6-byte r/w commands, transfer length 0
1442 * means 256 blocks of data, not 0 block.
1449 if (unlikely(scmd->cmd_len < 16))
1451 scsi_16_lba_len(cdb, &block, &n_block);
1452 if (unlikely(cdb[1] & (1 << 3)))
1453 tf_flags |= ATA_TFLAG_FUA;
1456 DPRINTK("no-byte command\n");
1460 /* Check and compose ATA command */
1462 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1463 * length 0 means transfer 0 block of data.
1464 * However, for ATA R/W commands, sector count 0 means
1465 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1467 * WARNING: one or two older ATA drives treat 0 as 0...
1471 qc->flags |= ATA_QCFLAG_IO;
1472 qc->nbytes = n_block * ATA_SECT_SIZE;
1474 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1476 if (likely(rc == 0))
1481 /* treat all other errors as -EINVAL, fall through */
1483 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1484 /* "Invalid field in cbd" */
1488 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1489 /* "Logical Block Address out of range" */
1493 scmd->result = SAM_STAT_GOOD;
1497 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1499 struct ata_port *ap = qc->ap;
1500 struct scsi_cmnd *cmd = qc->scsicmd;
1501 u8 *cdb = cmd->cmnd;
1502 int need_sense = (qc->err_mask != 0);
1504 /* For ATA pass thru (SAT) commands, generate a sense block if
1505 * user mandated it or if there's an error. Note that if we
1506 * generate because the user forced us to, a check condition
1507 * is generated and the ATA register values are returned
1508 * whether the command completed successfully or not. If there
1509 * was no error, SK, ASC and ASCQ will all be zero.
1511 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1512 ((cdb[2] & 0x20) || need_sense)) {
1513 ata_gen_passthru_sense(qc);
1516 cmd->result = SAM_STAT_GOOD;
1518 /* TODO: decide which descriptor format to use
1519 * for 48b LBA devices and call that here
1520 * instead of the fixed desc, which is only
1521 * good for smaller LBA (and maybe CHS?)
1524 ata_gen_ata_sense(qc);
1528 /* XXX: track spindown state for spindown skipping and warning */
1529 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1530 qc->tf.command == ATA_CMD_STANDBYNOW1))
1531 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1532 else if (likely(system_state != SYSTEM_HALT &&
1533 system_state != SYSTEM_POWER_OFF))
1534 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1536 if (need_sense && !ap->ops->error_handler)
1537 ata_dump_status(ap->print_id, &qc->result_tf);
1545 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1546 * @dev: ATA device to which the command is addressed
1547 * @cmd: SCSI command to execute
1548 * @done: SCSI command completion function
1549 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1551 * Our ->queuecommand() function has decided that the SCSI
1552 * command issued can be directly translated into an ATA
1553 * command, rather than handled internally.
1555 * This function sets up an ata_queued_cmd structure for the
1556 * SCSI command, and sends that ata_queued_cmd to the hardware.
1558 * The xlat_func argument (actor) returns 0 if ready to execute
1559 * ATA command, else 1 to finish translation. If 1 is returned
1560 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1561 * to be set reflecting an error condition or clean (early)
1565 * spin_lock_irqsave(host lock)
1568 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1569 * needs to be deferred.
1571 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1572 void (*done)(struct scsi_cmnd *),
1573 ata_xlat_func_t xlat_func)
1575 struct ata_port *ap = dev->link->ap;
1576 struct ata_queued_cmd *qc;
1581 qc = ata_scsi_qc_new(dev, cmd, done);
1585 /* data is present; dma-map it */
1586 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1587 cmd->sc_data_direction == DMA_TO_DEVICE) {
1588 if (unlikely(scsi_bufflen(cmd) < 1)) {
1589 ata_dev_printk(dev, KERN_WARNING,
1590 "WARNING: zero len r/w req\n");
1594 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1596 qc->dma_dir = cmd->sc_data_direction;
1599 qc->complete_fn = ata_scsi_qc_complete;
1604 if (ap->ops->qc_defer) {
1605 if ((rc = ap->ops->qc_defer(qc)))
1609 /* select device, send command to hardware */
1618 DPRINTK("EXIT - early finish (good or error)\n");
1623 cmd->result = (DID_ERROR << 16);
1626 DPRINTK("EXIT - internal\n");
1631 DPRINTK("EXIT - defer\n");
1632 if (rc == ATA_DEFER_LINK)
1633 return SCSI_MLQUEUE_DEVICE_BUSY;
1635 return SCSI_MLQUEUE_HOST_BUSY;
1639 * ata_scsi_rbuf_get - Map response buffer.
1640 * @cmd: SCSI command containing buffer to be mapped.
1641 * @flags: unsigned long variable to store irq enable status
1642 * @copy_in: copy in from user buffer
1644 * Prepare buffer for simulated SCSI commands.
1647 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1650 * Pointer to response buffer.
1652 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1653 unsigned long *flags)
1655 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1657 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1659 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1660 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1661 return ata_scsi_rbuf;
1665 * ata_scsi_rbuf_put - Unmap response buffer.
1666 * @cmd: SCSI command containing buffer to be unmapped.
1667 * @copy_out: copy out result
1668 * @flags: @flags passed to ata_scsi_rbuf_get()
1670 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1671 * @copy_back is true.
1674 * Unlocks ata_scsi_rbuf_lock.
1676 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1677 unsigned long *flags)
1680 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1681 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1682 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1686 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1687 * @args: device IDENTIFY data / SCSI command of interest.
1688 * @actor: Callback hook for desired SCSI command simulator
1690 * Takes care of the hard work of simulating a SCSI command...
1691 * Mapping the response buffer, calling the command's handler,
1692 * and handling the handler's return value. This return value
1693 * indicates whether the handler wishes the SCSI command to be
1694 * completed successfully (0), or not (in which case cmd->result
1695 * and sense buffer are assumed to be set).
1698 * spin_lock_irqsave(host lock)
1700 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1701 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1705 struct scsi_cmnd *cmd = args->cmd;
1706 unsigned long flags;
1708 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1709 rc = actor(args, rbuf);
1710 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
1713 cmd->result = SAM_STAT_GOOD;
1718 * ata_scsiop_inq_std - Simulate INQUIRY command
1719 * @args: device IDENTIFY data / SCSI command of interest.
1720 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1722 * Returns standard device identification data associated
1723 * with non-VPD INQUIRY command output.
1726 * spin_lock_irqsave(host lock)
1728 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1730 const u8 versions[] = {
1731 0x60, /* SAM-3 (no version claimed) */
1734 0x20, /* SBC-2 (no version claimed) */
1737 0x60 /* SPC-3 (no version claimed) */
1742 0x5, /* claim SPC-3 version compatibility */
1749 /* set scsi removeable (RMB) bit per ata bit */
1750 if (ata_id_removeable(args->id))
1753 memcpy(rbuf, hdr, sizeof(hdr));
1754 memcpy(&rbuf[8], "ATA ", 8);
1755 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1756 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1758 if (rbuf[32] == 0 || rbuf[32] == ' ')
1759 memcpy(&rbuf[32], "n/a ", 4);
1761 memcpy(rbuf + 59, versions, sizeof(versions));
1767 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1768 * @args: device IDENTIFY data / SCSI command of interest.
1769 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1771 * Returns list of inquiry VPD pages available.
1774 * spin_lock_irqsave(host lock)
1776 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1778 const u8 pages[] = {
1779 0x00, /* page 0x00, this page */
1780 0x80, /* page 0x80, unit serial no page */
1781 0x83 /* page 0x83, device ident page */
1784 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1785 memcpy(rbuf + 4, pages, sizeof(pages));
1790 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1791 * @args: device IDENTIFY data / SCSI command of interest.
1792 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1794 * Returns ATA device serial number.
1797 * spin_lock_irqsave(host lock)
1799 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
1803 0x80, /* this page code */
1805 ATA_ID_SERNO_LEN, /* page len */
1808 memcpy(rbuf, hdr, sizeof(hdr));
1809 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1810 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1815 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1816 * @args: device IDENTIFY data / SCSI command of interest.
1817 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1819 * Yields two logical unit device identification designators:
1820 * - vendor specific ASCII containing the ATA serial number
1821 * - SAT defined "t10 vendor id based" containing ASCII vendor
1822 * name ("ATA "), model and serial numbers.
1825 * spin_lock_irqsave(host lock)
1827 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
1829 const int sat_model_serial_desc_len = 68;
1832 rbuf[1] = 0x83; /* this page code */
1835 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1837 rbuf[num + 3] = ATA_ID_SERNO_LEN;
1839 ata_id_string(args->id, (unsigned char *) rbuf + num,
1840 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1841 num += ATA_ID_SERNO_LEN;
1843 /* SAT defined lu model and serial numbers descriptor */
1844 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1847 rbuf[num + 3] = sat_model_serial_desc_len;
1849 memcpy(rbuf + num, "ATA ", 8);
1851 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
1853 num += ATA_ID_PROD_LEN;
1854 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
1856 num += ATA_ID_SERNO_LEN;
1858 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1863 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
1864 * @args: device IDENTIFY data / SCSI command of interest.
1865 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1867 * Yields SAT-specified ATA VPD page.
1870 * spin_lock_irqsave(host lock)
1872 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
1874 struct ata_taskfile tf;
1876 memset(&tf, 0, sizeof(tf));
1878 rbuf[1] = 0x89; /* our page code */
1879 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
1880 rbuf[3] = (0x238 & 0xff);
1882 memcpy(&rbuf[8], "linux ", 8);
1883 memcpy(&rbuf[16], "libata ", 16);
1884 memcpy(&rbuf[32], DRV_VERSION, 4);
1885 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1887 /* we don't store the ATA device signature, so we fake it */
1889 tf.command = ATA_DRDY; /* really, this is Status reg */
1893 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
1894 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
1896 rbuf[56] = ATA_CMD_ID_ATA;
1898 memcpy(&rbuf[60], &args->id[0], 512);
1903 * ata_scsiop_noop - Command handler that simply returns success.
1904 * @args: device IDENTIFY data / SCSI command of interest.
1905 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1907 * No operation. Simply returns success to caller, to indicate
1908 * that the caller should successfully complete this SCSI command.
1911 * spin_lock_irqsave(host lock)
1913 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
1920 * ata_msense_caching - Simulate MODE SENSE caching info page
1921 * @id: device IDENTIFY data
1922 * @buf: output buffer
1924 * Generate a caching info page, which conditionally indicates
1925 * write caching to the SCSI layer, depending on device
1931 static unsigned int ata_msense_caching(u16 *id, u8 *buf)
1933 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
1934 if (ata_id_wcache_enabled(id))
1935 buf[2] |= (1 << 2); /* write cache enable */
1936 if (!ata_id_rahead_enabled(id))
1937 buf[12] |= (1 << 5); /* disable read ahead */
1938 return sizeof(def_cache_mpage);
1942 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1943 * @buf: output buffer
1945 * Generate a generic MODE SENSE control mode page.
1950 static unsigned int ata_msense_ctl_mode(u8 *buf)
1952 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
1953 return sizeof(def_control_mpage);
1957 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1958 * @buf: output buffer
1960 * Generate a generic MODE SENSE r/w error recovery page.
1965 static unsigned int ata_msense_rw_recovery(u8 *buf)
1967 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
1968 return sizeof(def_rw_recovery_mpage);
1972 * We can turn this into a real blacklist if it's needed, for now just
1973 * blacklist any Maxtor BANC1G10 revision firmware
1975 static int ata_dev_supports_fua(u16 *id)
1977 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
1981 if (!ata_id_has_fua(id))
1984 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
1985 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
1987 if (strcmp(model, "Maxtor"))
1989 if (strcmp(fw, "BANC1G10"))
1992 return 0; /* blacklisted */
1996 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1997 * @args: device IDENTIFY data / SCSI command of interest.
1998 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2000 * Simulate MODE SENSE commands. Assume this is invoked for direct
2001 * access devices (e.g. disks) only. There should be no block
2002 * descriptor for other device types.
2005 * spin_lock_irqsave(host lock)
2007 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2009 struct ata_device *dev = args->dev;
2010 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2011 const u8 sat_blk_desc[] = {
2012 0, 0, 0, 0, /* number of blocks: sat unspecified */
2014 0, 0x2, 0x0 /* block length: 512 bytes */
2017 unsigned int ebd, page_control, six_byte;
2022 six_byte = (scsicmd[0] == MODE_SENSE);
2023 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2025 * LLBA bit in msense(10) ignored (compliant)
2028 page_control = scsicmd[2] >> 6;
2029 switch (page_control) {
2030 case 0: /* current */
2031 break; /* supported */
2033 goto saving_not_supp;
2034 case 1: /* changeable */
2035 case 2: /* defaults */
2041 p += 4 + (ebd ? 8 : 0);
2043 p += 8 + (ebd ? 8 : 0);
2045 pg = scsicmd[2] & 0x3f;
2048 * No mode subpages supported (yet) but asking for _all_
2049 * subpages may be valid
2051 if (spg && (spg != ALL_SUB_MPAGES))
2055 case RW_RECOVERY_MPAGE:
2056 p += ata_msense_rw_recovery(p);
2060 p += ata_msense_caching(args->id, p);
2064 p += ata_msense_ctl_mode(p);
2068 p += ata_msense_rw_recovery(p);
2069 p += ata_msense_caching(args->id, p);
2070 p += ata_msense_ctl_mode(p);
2073 default: /* invalid page code */
2078 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2079 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2083 rbuf[0] = p - rbuf - 1;
2086 rbuf[3] = sizeof(sat_blk_desc);
2087 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2090 unsigned int output_len = p - rbuf - 2;
2092 rbuf[0] = output_len >> 8;
2093 rbuf[1] = output_len;
2096 rbuf[7] = sizeof(sat_blk_desc);
2097 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2103 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2104 /* "Invalid field in cbd" */
2108 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2109 /* "Saving parameters not supported" */
2114 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2115 * @args: device IDENTIFY data / SCSI command of interest.
2116 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2118 * Simulate READ CAPACITY commands.
2123 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2125 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
2129 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2130 if (last_lba >= 0xffffffffULL)
2131 last_lba = 0xffffffff;
2133 /* sector count, 32-bit */
2134 rbuf[0] = last_lba >> (8 * 3);
2135 rbuf[1] = last_lba >> (8 * 2);
2136 rbuf[2] = last_lba >> (8 * 1);
2140 rbuf[6] = ATA_SECT_SIZE >> 8;
2141 rbuf[7] = ATA_SECT_SIZE & 0xff;
2143 /* sector count, 64-bit */
2144 rbuf[0] = last_lba >> (8 * 7);
2145 rbuf[1] = last_lba >> (8 * 6);
2146 rbuf[2] = last_lba >> (8 * 5);
2147 rbuf[3] = last_lba >> (8 * 4);
2148 rbuf[4] = last_lba >> (8 * 3);
2149 rbuf[5] = last_lba >> (8 * 2);
2150 rbuf[6] = last_lba >> (8 * 1);
2154 rbuf[10] = ATA_SECT_SIZE >> 8;
2155 rbuf[11] = ATA_SECT_SIZE & 0xff;
2162 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2163 * @args: device IDENTIFY data / SCSI command of interest.
2164 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2166 * Simulate REPORT LUNS command.
2169 * spin_lock_irqsave(host lock)
2171 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2174 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2179 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2181 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2182 /* FIXME: not quite right; we don't want the
2183 * translation of taskfile registers into
2184 * a sense descriptors, since that's only
2185 * correct for ATA, not ATAPI
2187 ata_gen_passthru_sense(qc);
2190 qc->scsidone(qc->scsicmd);
2194 /* is it pointless to prefer PIO for "safety reasons"? */
2195 static inline int ata_pio_use_silly(struct ata_port *ap)
2197 return (ap->flags & ATA_FLAG_PIO_DMA);
2200 static void atapi_request_sense(struct ata_queued_cmd *qc)
2202 struct ata_port *ap = qc->ap;
2203 struct scsi_cmnd *cmd = qc->scsicmd;
2205 DPRINTK("ATAPI request sense\n");
2207 /* FIXME: is this needed? */
2208 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2210 #ifdef CONFIG_ATA_SFF
2211 if (ap->ops->sff_tf_read)
2212 ap->ops->sff_tf_read(ap, &qc->tf);
2215 /* fill these in, for the case where they are -not- overwritten */
2216 cmd->sense_buffer[0] = 0x70;
2217 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2221 /* setup sg table and init transfer direction */
2222 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2223 ata_sg_init(qc, &qc->sgent, 1);
2224 qc->dma_dir = DMA_FROM_DEVICE;
2226 memset(&qc->cdb, 0, qc->dev->cdb_len);
2227 qc->cdb[0] = REQUEST_SENSE;
2228 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2230 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2231 qc->tf.command = ATA_CMD_PACKET;
2233 if (ata_pio_use_silly(ap)) {
2234 qc->tf.protocol = ATAPI_PROT_DMA;
2235 qc->tf.feature |= ATAPI_PKT_DMA;
2237 qc->tf.protocol = ATAPI_PROT_PIO;
2238 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2241 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2243 qc->complete_fn = atapi_sense_complete;
2250 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2252 struct scsi_cmnd *cmd = qc->scsicmd;
2253 unsigned int err_mask = qc->err_mask;
2255 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2257 /* handle completion from new EH */
2258 if (unlikely(qc->ap->ops->error_handler &&
2259 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2261 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2262 /* FIXME: not quite right; we don't want the
2263 * translation of taskfile registers into a
2264 * sense descriptors, since that's only
2265 * correct for ATA, not ATAPI
2267 ata_gen_passthru_sense(qc);
2270 /* SCSI EH automatically locks door if sdev->locked is
2271 * set. Sometimes door lock request continues to
2272 * fail, for example, when no media is present. This
2273 * creates a loop - SCSI EH issues door lock which
2274 * fails and gets invoked again to acquire sense data
2275 * for the failed command.
2277 * If door lock fails, always clear sdev->locked to
2278 * avoid this infinite loop.
2280 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2281 qc->dev->sdev->locked = 0;
2283 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2289 /* successful completion or old EH failure path */
2290 if (unlikely(err_mask & AC_ERR_DEV)) {
2291 cmd->result = SAM_STAT_CHECK_CONDITION;
2292 atapi_request_sense(qc);
2294 } else if (unlikely(err_mask)) {
2295 /* FIXME: not quite right; we don't want the
2296 * translation of taskfile registers into
2297 * a sense descriptors, since that's only
2298 * correct for ATA, not ATAPI
2300 ata_gen_passthru_sense(qc);
2302 u8 *scsicmd = cmd->cmnd;
2304 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2305 unsigned long flags;
2308 buf = ata_scsi_rbuf_get(cmd, true, &flags);
2310 /* ATAPI devices typically report zero for their SCSI version,
2311 * and sometimes deviate from the spec WRT response data
2312 * format. If SCSI version is reported as zero like normal,
2313 * then we make the following fixups: 1) Fake MMC-5 version,
2314 * to indicate to the Linux scsi midlayer this is a modern
2315 * device. 2) Ensure response data format / ATAPI information
2316 * are always correct.
2323 ata_scsi_rbuf_put(cmd, true, &flags);
2326 cmd->result = SAM_STAT_GOOD;
2333 * atapi_xlat - Initialize PACKET taskfile
2334 * @qc: command structure to be initialized
2337 * spin_lock_irqsave(host lock)
2340 * Zero on success, non-zero on failure.
2342 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2344 struct scsi_cmnd *scmd = qc->scsicmd;
2345 struct ata_device *dev = qc->dev;
2346 int nodata = (scmd->sc_data_direction == DMA_NONE);
2347 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2348 unsigned int nbytes;
2350 memset(qc->cdb, 0, dev->cdb_len);
2351 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2353 qc->complete_fn = atapi_qc_complete;
2355 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2356 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2357 qc->tf.flags |= ATA_TFLAG_WRITE;
2358 DPRINTK("direction: write\n");
2361 qc->tf.command = ATA_CMD_PACKET;
2362 ata_qc_set_pc_nbytes(qc);
2364 /* check whether ATAPI DMA is safe */
2365 if (!nodata && !using_pio && atapi_check_dma(qc))
2368 /* Some controller variants snoop this value for Packet
2369 * transfers to do state machine and FIFO management. Thus we
2370 * want to set it properly, and for DMA where it is
2371 * effectively meaningless.
2373 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2375 /* Most ATAPI devices which honor transfer chunk size don't
2376 * behave according to the spec when odd chunk size which
2377 * matches the transfer length is specified. If the number of
2378 * bytes to transfer is 2n+1. According to the spec, what
2379 * should happen is to indicate that 2n+1 is going to be
2380 * transferred and transfer 2n+2 bytes where the last byte is
2383 * In practice, this doesn't happen. ATAPI devices first
2384 * indicate and transfer 2n bytes and then indicate and
2385 * transfer 2 bytes where the last byte is padding.
2387 * This inconsistency confuses several controllers which
2388 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2389 * These controllers use actual number of transferred bytes to
2390 * update DMA poitner and transfer of 4n+2 bytes make those
2391 * controller push DMA pointer by 4n+4 bytes because SATA data
2392 * FISes are aligned to 4 bytes. This causes data corruption
2393 * and buffer overrun.
2395 * Always setting nbytes to even number solves this problem
2396 * because then ATAPI devices don't have to split data at 2n
2402 qc->tf.lbam = (nbytes & 0xFF);
2403 qc->tf.lbah = (nbytes >> 8);
2406 qc->tf.protocol = ATAPI_PROT_NODATA;
2408 qc->tf.protocol = ATAPI_PROT_PIO;
2411 qc->tf.protocol = ATAPI_PROT_DMA;
2412 qc->tf.feature |= ATAPI_PKT_DMA;
2414 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2415 (scmd->sc_data_direction != DMA_TO_DEVICE))
2416 /* some SATA bridges need us to indicate data xfer direction */
2417 qc->tf.feature |= ATAPI_DMADIR;
2421 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2422 as ATAPI tape drives don't get this right otherwise */
2426 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2428 if (!sata_pmp_attached(ap)) {
2429 if (likely(devno < ata_link_max_devices(&ap->link)))
2430 return &ap->link.device[devno];
2432 if (likely(devno < ap->nr_pmp_links))
2433 return &ap->pmp_link[devno].device[0];
2439 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2440 const struct scsi_device *scsidev)
2444 /* skip commands not addressed to targets we simulate */
2445 if (!sata_pmp_attached(ap)) {
2446 if (unlikely(scsidev->channel || scsidev->lun))
2448 devno = scsidev->id;
2450 if (unlikely(scsidev->id || scsidev->lun))
2452 devno = scsidev->channel;
2455 return ata_find_dev(ap, devno);
2459 * ata_scsi_dev_enabled - determine if device is enabled
2462 * Determine if commands should be sent to the specified device.
2465 * spin_lock_irqsave(host lock)
2468 * 0 if commands are not allowed / 1 if commands are allowed
2471 static int ata_scsi_dev_enabled(struct ata_device *dev)
2473 if (unlikely(!ata_dev_enabled(dev)))
2476 if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) {
2477 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2478 ata_dev_printk(dev, KERN_WARNING,
2479 "WARNING: ATAPI is %s, device ignored.\n",
2480 atapi_enabled ? "not supported with this driver" : "disabled");
2489 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2490 * @ap: ATA port to which the device is attached
2491 * @scsidev: SCSI device from which we derive the ATA device
2493 * Given various information provided in struct scsi_cmnd,
2494 * map that onto an ATA bus, and using that mapping
2495 * determine which ata_device is associated with the
2496 * SCSI command to be sent.
2499 * spin_lock_irqsave(host lock)
2502 * Associated ATA device, or %NULL if not found.
2504 static struct ata_device *
2505 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2507 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2509 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
2516 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2517 * @byte1: Byte 1 from pass-thru CDB.
2520 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2523 ata_scsi_map_proto(u8 byte1)
2525 switch((byte1 & 0x1e) >> 1) {
2526 case 3: /* Non-data */
2527 return ATA_PROT_NODATA;
2530 case 10: /* UDMA Data-in */
2531 case 11: /* UDMA Data-Out */
2532 return ATA_PROT_DMA;
2534 case 4: /* PIO Data-in */
2535 case 5: /* PIO Data-out */
2536 return ATA_PROT_PIO;
2538 case 0: /* Hard Reset */
2540 case 8: /* Device Diagnostic */
2541 case 9: /* Device Reset */
2542 case 7: /* DMA Queued */
2543 case 12: /* FPDMA */
2544 case 15: /* Return Response Info */
2545 default: /* Reserved */
2549 return ATA_PROT_UNKNOWN;
2553 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2554 * @qc: command structure to be initialized
2556 * Handles either 12 or 16-byte versions of the CDB.
2559 * Zero on success, non-zero on failure.
2561 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2563 struct ata_taskfile *tf = &(qc->tf);
2564 struct scsi_cmnd *scmd = qc->scsicmd;
2565 struct ata_device *dev = qc->dev;
2566 const u8 *cdb = scmd->cmnd;
2568 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2572 * Filter TPM commands by default. These provide an
2573 * essentially uncontrolled encrypted "back door" between
2574 * applications and the disk. Set libata.allow_tpm=1 if you
2575 * have a real reason for wanting to use them. This ensures
2576 * that installed software cannot easily mess stuff up without
2577 * user intent. DVR type users will probably ship with this enabled
2578 * for movie content management.
2580 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2581 * for this and should do in future but that it is not sufficient as
2582 * DCS is an optional feature set. Thus we also do the software filter
2583 * so that we comply with the TC consortium stated goal that the user
2584 * can turn off TC features of their system.
2586 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
2589 /* We may not issue DMA commands if no DMA mode is set */
2590 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2594 * 12 and 16 byte CDBs use different offsets to
2595 * provide the various register values.
2597 if (cdb[0] == ATA_16) {
2599 * 16-byte CDB - may contain extended commands.
2601 * If that is the case, copy the upper byte register values.
2603 if (cdb[1] & 0x01) {
2604 tf->hob_feature = cdb[3];
2605 tf->hob_nsect = cdb[5];
2606 tf->hob_lbal = cdb[7];
2607 tf->hob_lbam = cdb[9];
2608 tf->hob_lbah = cdb[11];
2609 tf->flags |= ATA_TFLAG_LBA48;
2611 tf->flags &= ~ATA_TFLAG_LBA48;
2614 * Always copy low byte, device and command registers.
2616 tf->feature = cdb[4];
2621 tf->device = cdb[13];
2622 tf->command = cdb[14];
2625 * 12-byte CDB - incapable of extended commands.
2627 tf->flags &= ~ATA_TFLAG_LBA48;
2629 tf->feature = cdb[3];
2634 tf->device = cdb[8];
2635 tf->command = cdb[9];
2638 /* enforce correct master/slave bit */
2639 tf->device = dev->devno ?
2640 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2642 /* sanity check for pio multi commands */
2643 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2646 if (is_multi_taskfile(tf)) {
2647 unsigned int multi_count = 1 << (cdb[1] >> 5);
2649 /* compare the passed through multi_count
2650 * with the cached multi_count of libata
2652 if (multi_count != dev->multi_count)
2653 ata_dev_printk(dev, KERN_WARNING,
2654 "invalid multi_count %u ignored\n",
2658 /* READ/WRITE LONG use a non-standard sect_size */
2659 qc->sect_size = ATA_SECT_SIZE;
2660 switch (tf->command) {
2661 case ATA_CMD_READ_LONG:
2662 case ATA_CMD_READ_LONG_ONCE:
2663 case ATA_CMD_WRITE_LONG:
2664 case ATA_CMD_WRITE_LONG_ONCE:
2665 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2667 qc->sect_size = scsi_bufflen(scmd);
2671 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2672 * SET_FEATURES - XFER MODE must be preceded/succeeded
2673 * by an update to hardware-specific registers for each
2674 * controller (i.e. the reason for ->set_piomode(),
2675 * ->set_dmamode(), and ->post_set_mode() hooks).
2677 if ((tf->command == ATA_CMD_SET_FEATURES)
2678 && (tf->feature == SETFEATURES_XFER))
2682 * Set flags so that all registers will be written,
2683 * and pass on write indication (used for PIO/DMA
2686 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2688 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2689 tf->flags |= ATA_TFLAG_WRITE;
2692 * Set transfer length.
2694 * TODO: find out if we need to do more here to
2695 * cover scatter/gather case.
2697 ata_qc_set_pc_nbytes(qc);
2699 /* request result TF and be quiet about device error */
2700 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2705 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
2706 /* "Invalid field in cdb" */
2711 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2713 * @cmd: SCSI command opcode to consider
2715 * Look up the SCSI command given, and determine whether the
2716 * SCSI command is to be translated or simulated.
2719 * Pointer to translation function if possible, %NULL if not.
2722 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2732 return ata_scsi_rw_xlat;
2734 case SYNCHRONIZE_CACHE:
2735 if (ata_try_flush_cache(dev))
2736 return ata_scsi_flush_xlat;
2741 return ata_scsi_verify_xlat;
2745 return ata_scsi_pass_thru;
2748 return ata_scsi_start_stop_xlat;
2755 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2756 * @ap: ATA port to which the command was being sent
2757 * @cmd: SCSI command to dump
2759 * Prints the contents of a SCSI command via printk().
2762 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2763 struct scsi_cmnd *cmd)
2766 struct scsi_device *scsidev = cmd->device;
2767 u8 *scsicmd = cmd->cmnd;
2769 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2771 scsidev->channel, scsidev->id, scsidev->lun,
2772 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2773 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2778 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2779 void (*done)(struct scsi_cmnd *),
2780 struct ata_device *dev)
2782 u8 scsi_op = scmd->cmnd[0];
2783 ata_xlat_func_t xlat_func;
2786 if (dev->class == ATA_DEV_ATA) {
2787 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2790 xlat_func = ata_get_xlat_func(dev, scsi_op);
2792 if (unlikely(!scmd->cmd_len))
2796 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2797 /* relay SCSI command to ATAPI device */
2798 int len = COMMAND_SIZE(scsi_op);
2799 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
2802 xlat_func = atapi_xlat;
2804 /* ATA_16 passthru, treat as an ATA command */
2805 if (unlikely(scmd->cmd_len > 16))
2808 xlat_func = ata_get_xlat_func(dev, scsi_op);
2813 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
2815 ata_scsi_simulate(dev, scmd, done);
2820 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
2821 scmd->cmd_len, scsi_op, dev->cdb_len);
2822 scmd->result = DID_ERROR << 16;
2828 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2829 * @cmd: SCSI command to be sent
2830 * @done: Completion function, called when command is complete
2832 * In some cases, this function translates SCSI commands into
2833 * ATA taskfiles, and queues the taskfiles to be sent to
2834 * hardware. In other cases, this function simulates a
2835 * SCSI device by evaluating and responding to certain
2836 * SCSI commands. This creates the overall effect of
2837 * ATA and ATAPI devices appearing as SCSI devices.
2840 * Releases scsi-layer-held lock, and obtains host lock.
2843 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2846 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2848 struct ata_port *ap;
2849 struct ata_device *dev;
2850 struct scsi_device *scsidev = cmd->device;
2851 struct Scsi_Host *shost = scsidev->host;
2854 ap = ata_shost_to_port(shost);
2856 spin_unlock(shost->host_lock);
2857 spin_lock(ap->lock);
2859 ata_scsi_dump_cdb(ap, cmd);
2861 dev = ata_scsi_find_dev(ap, scsidev);
2863 rc = __ata_scsi_queuecmd(cmd, done, dev);
2865 cmd->result = (DID_BAD_TARGET << 16);
2869 spin_unlock(ap->lock);
2870 spin_lock(shost->host_lock);
2875 * ata_scsi_simulate - simulate SCSI command on ATA device
2876 * @dev: the target device
2877 * @cmd: SCSI command being sent to device.
2878 * @done: SCSI command completion function.
2880 * Interprets and directly executes a select list of SCSI commands
2881 * that can be handled internally.
2884 * spin_lock_irqsave(host lock)
2887 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
2888 void (*done)(struct scsi_cmnd *))
2890 struct ata_scsi_args args;
2891 const u8 *scsicmd = cmd->cmnd;
2899 switch(scsicmd[0]) {
2900 /* TODO: worth improving? */
2902 ata_scsi_invalid_field(cmd, done);
2906 if (scsicmd[1] & 2) /* is CmdDt set? */
2907 ata_scsi_invalid_field(cmd, done);
2908 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2909 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2910 else switch (scsicmd[2]) {
2912 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2915 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2918 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2921 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
2924 ata_scsi_invalid_field(cmd, done);
2931 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2934 case MODE_SELECT: /* unconditionally return */
2935 case MODE_SELECT_10: /* bad-field-in-cdb */
2936 ata_scsi_invalid_field(cmd, done);
2940 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2943 case SERVICE_ACTION_IN:
2944 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2945 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2947 ata_scsi_invalid_field(cmd, done);
2951 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2955 ata_scsi_set_sense(cmd, 0, 0, 0);
2956 cmd->result = (DRIVER_SENSE << 24);
2960 /* if we reach this, then writeback caching is disabled,
2961 * turning this into a no-op.
2963 case SYNCHRONIZE_CACHE:
2966 /* no-op's, complete with success */
2970 case TEST_UNIT_READY:
2971 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2974 case SEND_DIAGNOSTIC:
2975 tmp8 = scsicmd[1] & ~(1 << 3);
2976 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
2977 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2979 ata_scsi_invalid_field(cmd, done);
2982 /* all other commands */
2984 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2985 /* "Invalid command operation code" */
2991 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
2995 for (i = 0; i < host->n_ports; i++) {
2996 struct ata_port *ap = host->ports[i];
2997 struct Scsi_Host *shost;
3000 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3004 *(struct ata_port **)&shost->hostdata[0] = ap;
3005 ap->scsi_host = shost;
3007 shost->transportt = &ata_scsi_transport_template;
3008 shost->unique_id = ap->print_id;
3011 shost->max_channel = 1;
3012 shost->max_cmd_len = 16;
3014 /* Schedule policy is determined by ->qc_defer()
3015 * callback and it needs to see every deferred qc.
3016 * Set host_blocked to 1 to prevent SCSI midlayer from
3017 * automatically deferring requests.
3019 shost->max_host_blocked = 1;
3021 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3029 scsi_host_put(host->ports[i]->scsi_host);
3032 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3034 scsi_remove_host(shost);
3035 scsi_host_put(shost);
3040 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3043 struct ata_device *last_failed_dev = NULL;
3044 struct ata_link *link;
3045 struct ata_device *dev;
3047 if (ap->flags & ATA_FLAG_DISABLED)
3051 ata_port_for_each_link(link, ap) {
3052 ata_link_for_each_dev(dev, link) {
3053 struct scsi_device *sdev;
3054 int channel = 0, id = 0;
3056 if (!ata_dev_enabled(dev) || dev->sdev)
3059 if (ata_is_host_link(link))
3062 channel = link->pmp;
3064 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3066 if (!IS_ERR(sdev)) {
3068 scsi_device_put(sdev);
3073 /* If we scanned while EH was in progress or allocation
3074 * failure occurred, scan would have failed silently. Check
3075 * whether all devices are attached.
3077 ata_port_for_each_link(link, ap) {
3078 ata_link_for_each_dev(dev, link) {
3079 if (ata_dev_enabled(dev) && !dev->sdev)
3087 /* we're missing some SCSI devices */
3089 /* If caller requested synchrnous scan && we've made
3090 * any progress, sleep briefly and repeat.
3092 if (dev != last_failed_dev) {
3094 last_failed_dev = dev;
3098 /* We might be failing to detect boot device, give it
3099 * a few more chances.
3106 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3107 "failed without making any progress,\n"
3108 " switching to async\n");
3111 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3112 round_jiffies_relative(HZ));
3116 * ata_scsi_offline_dev - offline attached SCSI device
3117 * @dev: ATA device to offline attached SCSI device for
3119 * This function is called from ata_eh_hotplug() and responsible
3120 * for taking the SCSI device attached to @dev offline. This
3121 * function is called with host lock which protects dev->sdev
3125 * spin_lock_irqsave(host lock)
3128 * 1 if attached SCSI device exists, 0 otherwise.
3130 int ata_scsi_offline_dev(struct ata_device *dev)
3133 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3140 * ata_scsi_remove_dev - remove attached SCSI device
3141 * @dev: ATA device to remove attached SCSI device for
3143 * This function is called from ata_eh_scsi_hotplug() and
3144 * responsible for removing the SCSI device attached to @dev.
3147 * Kernel thread context (may sleep).
3149 static void ata_scsi_remove_dev(struct ata_device *dev)
3151 struct ata_port *ap = dev->link->ap;
3152 struct scsi_device *sdev;
3153 unsigned long flags;
3155 /* Alas, we need to grab scan_mutex to ensure SCSI device
3156 * state doesn't change underneath us and thus
3157 * scsi_device_get() always succeeds. The mutex locking can
3158 * be removed if there is __scsi_device_get() interface which
3159 * increments reference counts regardless of device state.
3161 mutex_lock(&ap->scsi_host->scan_mutex);
3162 spin_lock_irqsave(ap->lock, flags);
3164 /* clearing dev->sdev is protected by host lock */
3169 /* If user initiated unplug races with us, sdev can go
3170 * away underneath us after the host lock and
3171 * scan_mutex are released. Hold onto it.
3173 if (scsi_device_get(sdev) == 0) {
3174 /* The following ensures the attached sdev is
3175 * offline on return from ata_scsi_offline_dev()
3176 * regardless it wins or loses the race
3177 * against this function.
3179 scsi_device_set_state(sdev, SDEV_OFFLINE);
3186 spin_unlock_irqrestore(ap->lock, flags);
3187 mutex_unlock(&ap->scsi_host->scan_mutex);
3190 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3191 sdev->sdev_gendev.bus_id);
3193 scsi_remove_device(sdev);
3194 scsi_device_put(sdev);
3198 static void ata_scsi_handle_link_detach(struct ata_link *link)
3200 struct ata_port *ap = link->ap;
3201 struct ata_device *dev;
3203 ata_link_for_each_dev(dev, link) {
3204 unsigned long flags;
3206 if (!(dev->flags & ATA_DFLAG_DETACHED))
3209 spin_lock_irqsave(ap->lock, flags);
3210 dev->flags &= ~ATA_DFLAG_DETACHED;
3211 spin_unlock_irqrestore(ap->lock, flags);
3213 ata_scsi_remove_dev(dev);
3218 * ata_scsi_media_change_notify - send media change event
3219 * @dev: Pointer to the disk device with media change event
3221 * Tell the block layer to send a media change notification
3225 * spin_lock_irqsave(host lock)
3227 void ata_scsi_media_change_notify(struct ata_device *dev)
3230 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3235 * ata_scsi_hotplug - SCSI part of hotplug
3236 * @work: Pointer to ATA port to perform SCSI hotplug on
3238 * Perform SCSI part of hotplug. It's executed from a separate
3239 * workqueue after EH completes. This is necessary because SCSI
3240 * hot plugging requires working EH and hot unplugging is
3241 * synchronized with hot plugging with a mutex.
3244 * Kernel thread context (may sleep).
3246 void ata_scsi_hotplug(struct work_struct *work)
3248 struct ata_port *ap =
3249 container_of(work, struct ata_port, hotplug_task.work);
3252 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3253 DPRINTK("ENTER/EXIT - unloading\n");
3259 /* Unplug detached devices. We cannot use link iterator here
3260 * because PMP links have to be scanned even if PMP is
3261 * currently not attached. Iterate manually.
3263 ata_scsi_handle_link_detach(&ap->link);
3265 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3266 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3268 /* scan for new ones */
3269 ata_scsi_scan_host(ap, 0);
3275 * ata_scsi_user_scan - indication for user-initiated bus scan
3276 * @shost: SCSI host to scan
3277 * @channel: Channel to scan
3281 * This function is called when user explicitly requests bus
3282 * scan. Set probe pending flag and invoke EH.
3285 * SCSI layer (we don't care)
3290 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3291 unsigned int id, unsigned int lun)
3293 struct ata_port *ap = ata_shost_to_port(shost);
3294 unsigned long flags;
3297 if (!ap->ops->error_handler)
3300 if (lun != SCAN_WILD_CARD && lun)
3303 if (!sata_pmp_attached(ap)) {
3304 if (channel != SCAN_WILD_CARD && channel)
3308 if (id != SCAN_WILD_CARD && id)
3313 spin_lock_irqsave(ap->lock, flags);
3315 if (devno == SCAN_WILD_CARD) {
3316 struct ata_link *link;
3318 ata_port_for_each_link(link, ap) {
3319 struct ata_eh_info *ehi = &link->eh_info;
3320 ehi->probe_mask |= ATA_ALL_DEVICES;
3321 ehi->action |= ATA_EH_RESET;
3324 struct ata_device *dev = ata_find_dev(ap, devno);
3327 struct ata_eh_info *ehi = &dev->link->eh_info;
3328 ehi->probe_mask |= 1 << dev->devno;
3329 ehi->action |= ATA_EH_RESET;
3335 ata_port_schedule_eh(ap);
3336 spin_unlock_irqrestore(ap->lock, flags);
3337 ata_port_wait_eh(ap);
3339 spin_unlock_irqrestore(ap->lock, flags);
3345 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3346 * @work: Pointer to ATA port to perform scsi_rescan_device()
3348 * After ATA pass thru (SAT) commands are executed successfully,
3349 * libata need to propagate the changes to SCSI layer. This
3350 * function must be executed from ata_aux_wq such that sdev
3351 * attach/detach don't race with rescan.
3354 * Kernel thread context (may sleep).
3356 void ata_scsi_dev_rescan(struct work_struct *work)
3358 struct ata_port *ap =
3359 container_of(work, struct ata_port, scsi_rescan_task);
3360 struct ata_link *link;
3361 struct ata_device *dev;
3362 unsigned long flags;
3364 spin_lock_irqsave(ap->lock, flags);
3366 ata_port_for_each_link(link, ap) {
3367 ata_link_for_each_dev(dev, link) {
3368 struct scsi_device *sdev = dev->sdev;
3370 if (!ata_dev_enabled(dev) || !sdev)
3372 if (scsi_device_get(sdev))
3375 spin_unlock_irqrestore(ap->lock, flags);
3376 scsi_rescan_device(&(sdev->sdev_gendev));
3377 scsi_device_put(sdev);
3378 spin_lock_irqsave(ap->lock, flags);
3382 spin_unlock_irqrestore(ap->lock, flags);
3386 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3387 * @host: ATA host container for all SAS ports
3388 * @port_info: Information from low-level host driver
3389 * @shost: SCSI host that the scsi device is attached to
3392 * PCI/etc. bus probe sem.
3395 * ata_port pointer on success / NULL on failure.
3398 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3399 struct ata_port_info *port_info,
3400 struct Scsi_Host *shost)
3402 struct ata_port *ap;
3404 ap = ata_port_alloc(host);
3409 ap->lock = shost->host_lock;
3410 ap->pio_mask = port_info->pio_mask;
3411 ap->mwdma_mask = port_info->mwdma_mask;
3412 ap->udma_mask = port_info->udma_mask;
3413 ap->flags |= port_info->flags;
3414 ap->ops = port_info->port_ops;
3415 ap->cbl = ATA_CBL_SATA;
3419 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3422 * ata_sas_port_start - Set port up for dma.
3423 * @ap: Port to initialize
3425 * Called just after data structures for each port are
3428 * May be used as the port_start() entry in ata_port_operations.
3431 * Inherited from caller.
3433 int ata_sas_port_start(struct ata_port *ap)
3437 EXPORT_SYMBOL_GPL(ata_sas_port_start);
3440 * ata_port_stop - Undo ata_sas_port_start()
3441 * @ap: Port to shut down
3443 * May be used as the port_stop() entry in ata_port_operations.
3446 * Inherited from caller.
3449 void ata_sas_port_stop(struct ata_port *ap)
3452 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3455 * ata_sas_port_init - Initialize a SATA device
3456 * @ap: SATA port to initialize
3459 * PCI/etc. bus probe sem.
3462 * Zero on success, non-zero on error.
3465 int ata_sas_port_init(struct ata_port *ap)
3467 int rc = ap->ops->port_start(ap);
3470 ap->print_id = ata_print_id++;
3471 rc = ata_bus_probe(ap);
3476 EXPORT_SYMBOL_GPL(ata_sas_port_init);
3479 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3480 * @ap: SATA port to destroy
3484 void ata_sas_port_destroy(struct ata_port *ap)
3486 if (ap->ops->port_stop)
3487 ap->ops->port_stop(ap);
3490 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3493 * ata_sas_slave_configure - Default slave_config routine for libata devices
3494 * @sdev: SCSI device to configure
3495 * @ap: ATA port to which SCSI device is attached
3501 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3503 ata_scsi_sdev_config(sdev);
3504 ata_scsi_dev_config(sdev, ap->link.device);
3507 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3510 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3511 * @cmd: SCSI command to be sent
3512 * @done: Completion function, called when command is complete
3513 * @ap: ATA port to which the command is being sent
3516 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3520 int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3521 struct ata_port *ap)
3525 ata_scsi_dump_cdb(ap, cmd);
3527 if (likely(ata_scsi_dev_enabled(ap->link.device)))
3528 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
3530 cmd->result = (DID_BAD_TARGET << 16);
3535 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);