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
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[RW_RECOVERY_MPAGE_LEN] = {
76 RW_RECOVERY_MPAGE_LEN - 2,
78 0, /* read retry count */
80 0, /* write retry count */
84 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
87 0, /* contains WCE, needs to be 0 for logic */
88 0, 0, 0, 0, 0, 0, 0, 0, 0,
89 0, /* contains DRA, needs to be 0 for logic */
93 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
95 CONTROL_MPAGE_LEN - 2,
96 2, /* DSENSE=0, GLTSD=1 */
97 0, /* [QAM+QERR may be 1, see 05-359r1] */
98 0, 0, 0, 0, 0xff, 0xff,
99 0, 30 /* extended self test time, see 05-359r1 */
103 * libata transport template. libata doesn't do real transport stuff.
104 * It just needs the eh_timed_out hook.
106 static struct scsi_transport_template ata_scsi_transport_template = {
107 .eh_strategy_handler = ata_scsi_error,
108 .eh_timed_out = ata_scsi_timed_out,
109 .user_scan = ata_scsi_user_scan,
113 static const struct {
116 } link_pm_policy[] = {
117 { NOT_AVAILABLE, "max_performance" },
118 { MIN_POWER, "min_power" },
119 { MAX_PERFORMANCE, "max_performance" },
120 { MEDIUM_POWER, "medium_power" },
123 static const char *ata_scsi_lpm_get(enum link_pm policy)
127 for (i = 0; i < ARRAY_SIZE(link_pm_policy); i++)
128 if (link_pm_policy[i].value == policy)
129 return link_pm_policy[i].name;
134 static ssize_t ata_scsi_lpm_put(struct class_device *class_dev,
135 const char *buf, size_t count)
137 struct Scsi_Host *shost = class_to_shost(class_dev);
138 struct ata_port *ap = ata_shost_to_port(shost);
139 enum link_pm policy = 0;
143 * we are skipping array location 0 on purpose - this
144 * is because a value of NOT_AVAILABLE is displayed
145 * to the user as max_performance, but when the user
146 * writes "max_performance", they actually want the
147 * value to match MAX_PERFORMANCE.
149 for (i = 1; i < ARRAY_SIZE(link_pm_policy); i++) {
150 const int len = strlen(link_pm_policy[i].name);
151 if (strncmp(link_pm_policy[i].name, buf, len) == 0 &&
153 policy = link_pm_policy[i].value;
160 ata_lpm_schedule(ap, policy);
165 ata_scsi_lpm_show(struct class_device *class_dev, char *buf)
167 struct Scsi_Host *shost = class_to_shost(class_dev);
168 struct ata_port *ap = ata_shost_to_port(shost);
170 ata_scsi_lpm_get(ap->pm_policy);
175 return snprintf(buf, 23, "%s\n", policy);
177 CLASS_DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
178 ata_scsi_lpm_show, ata_scsi_lpm_put);
179 EXPORT_SYMBOL_GPL(class_device_attr_link_power_management_policy);
181 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
182 void (*done)(struct scsi_cmnd *))
184 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
185 /* "Invalid field in cbd" */
190 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
191 * @sdev: SCSI device for which BIOS geometry is to be determined
192 * @bdev: block device associated with @sdev
193 * @capacity: capacity of SCSI device
194 * @geom: location to which geometry will be output
196 * Generic bios head/sector/cylinder calculator
197 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
198 * mapping. Some situations may arise where the disk is not
199 * bootable if this is not used.
202 * Defined by the SCSI layer. We don't really care.
207 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
208 sector_t capacity, int geom[])
212 sector_div(capacity, 255*63);
219 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
220 * @sdev: SCSI device to get identify data for
221 * @arg: User buffer area for identify data
224 * Defined by the SCSI layer. We don't really care.
227 * Zero on success, negative errno on error.
229 static int ata_get_identity(struct scsi_device *sdev, void __user *arg)
231 struct ata_port *ap = ata_shost_to_port(sdev->host);
232 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
233 u16 __user *dst = arg;
239 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
242 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
243 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
246 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
247 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
250 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
251 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
258 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
259 * @scsidev: Device to which we are issuing command
260 * @arg: User provided data for issuing command
263 * Defined by the SCSI layer. We don't really care.
266 * Zero on success, negative errno on error.
268 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
271 u8 scsi_cmd[MAX_COMMAND_SIZE];
272 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
274 enum dma_data_direction data_dir;
280 if (copy_from_user(args, arg, sizeof(args)))
283 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
287 memset(scsi_cmd, 0, sizeof(scsi_cmd));
290 argsize = SECTOR_SIZE * args[3];
291 argbuf = kmalloc(argsize, GFP_KERNEL);
292 if (argbuf == NULL) {
297 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
298 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
299 block count in sector count field */
300 data_dir = DMA_FROM_DEVICE;
302 scsi_cmd[1] = (3 << 1); /* Non-data */
303 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
307 scsi_cmd[0] = ATA_16;
309 scsi_cmd[4] = args[2];
310 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
311 scsi_cmd[6] = args[3];
312 scsi_cmd[8] = args[1];
316 scsi_cmd[6] = args[1];
318 scsi_cmd[14] = args[0];
320 /* Good values for timeout and retries? Values below
321 from scsi_ioctl_send_command() for default case... */
322 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
323 sensebuf, (10*HZ), 5, 0);
325 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
326 u8 *desc = sensebuf + 8;
327 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
329 /* If we set cc then ATA pass-through will cause a
330 * check condition even if no error. Filter that. */
331 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
332 struct scsi_sense_hdr sshdr;
333 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
335 if (sshdr.sense_key == 0 &&
336 sshdr.asc == 0 && sshdr.ascq == 0)
337 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
340 /* Send userspace a few ATA registers (same as drivers/ide) */
341 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
342 desc[0] == 0x09) { /* code is "ATA Descriptor" */
343 args[0] = desc[13]; /* status */
344 args[1] = desc[3]; /* error */
345 args[2] = desc[5]; /* sector count (0:7) */
346 if (copy_to_user(arg, args, sizeof(args)))
358 && copy_to_user(arg + sizeof(args), argbuf, argsize))
367 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
368 * @scsidev: Device to which we are issuing command
369 * @arg: User provided data for issuing command
372 * Defined by the SCSI layer. We don't really care.
375 * Zero on success, negative errno on error.
377 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
380 u8 scsi_cmd[MAX_COMMAND_SIZE];
381 u8 args[7], *sensebuf = NULL;
387 if (copy_from_user(args, arg, sizeof(args)))
390 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
394 memset(scsi_cmd, 0, sizeof(scsi_cmd));
395 scsi_cmd[0] = ATA_16;
396 scsi_cmd[1] = (3 << 1); /* Non-data */
397 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
398 scsi_cmd[4] = args[1];
399 scsi_cmd[6] = args[2];
400 scsi_cmd[8] = args[3];
401 scsi_cmd[10] = args[4];
402 scsi_cmd[12] = args[5];
403 scsi_cmd[13] = args[6] & 0x4f;
404 scsi_cmd[14] = args[0];
406 /* Good values for timeout and retries? Values below
407 from scsi_ioctl_send_command() for default case... */
408 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
409 sensebuf, (10*HZ), 5, 0);
411 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
412 u8 *desc = sensebuf + 8;
413 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
415 /* If we set cc then ATA pass-through will cause a
416 * check condition even if no error. Filter that. */
417 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
418 struct scsi_sense_hdr sshdr;
419 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
421 if (sshdr.sense_key == 0 &&
422 sshdr.asc == 0 && sshdr.ascq == 0)
423 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
426 /* Send userspace ATA registers */
427 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
428 desc[0] == 0x09) {/* code is "ATA Descriptor" */
429 args[0] = desc[13]; /* status */
430 args[1] = desc[3]; /* error */
431 args[2] = desc[5]; /* sector count (0:7) */
432 args[3] = desc[7]; /* lbal */
433 args[4] = desc[9]; /* lbam */
434 args[5] = desc[11]; /* lbah */
435 args[6] = desc[12]; /* select */
436 if (copy_to_user(arg, args, sizeof(args)))
451 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
453 int val = -EINVAL, rc = -EINVAL;
456 case ATA_IOC_GET_IO32:
458 if (copy_to_user(arg, &val, 1))
462 case ATA_IOC_SET_IO32:
463 val = (unsigned long) arg;
468 case HDIO_GET_IDENTITY:
469 return ata_get_identity(scsidev, arg);
472 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
474 return ata_cmd_ioctl(scsidev, arg);
476 case HDIO_DRIVE_TASK:
477 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
479 return ata_task_ioctl(scsidev, arg);
490 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
491 * @dev: ATA device to which the new command is attached
492 * @cmd: SCSI command that originated this ATA command
493 * @done: SCSI command completion function
495 * Obtain a reference to an unused ata_queued_cmd structure,
496 * which is the basic libata structure representing a single
497 * ATA command sent to the hardware.
499 * If a command was available, fill in the SCSI-specific
500 * portions of the structure with information on the
504 * spin_lock_irqsave(host lock)
507 * Command allocated, or %NULL if none available.
509 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
510 struct scsi_cmnd *cmd,
511 void (*done)(struct scsi_cmnd *))
513 struct ata_queued_cmd *qc;
515 qc = ata_qc_new_init(dev);
520 qc->__sg = scsi_sglist(cmd);
521 qc->n_elem = scsi_sg_count(cmd);
523 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
531 * ata_dump_status - user friendly display of error info
532 * @id: id of the port in question
533 * @tf: ptr to filled out taskfile
535 * Decode and dump the ATA error/status registers for the user so
536 * that they have some idea what really happened at the non
537 * make-believe layer.
540 * inherited from caller
542 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
544 u8 stat = tf->command, err = tf->feature;
546 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
547 if (stat & ATA_BUSY) {
548 printk("Busy }\n"); /* Data is not valid in this case */
550 if (stat & 0x40) printk("DriveReady ");
551 if (stat & 0x20) printk("DeviceFault ");
552 if (stat & 0x10) printk("SeekComplete ");
553 if (stat & 0x08) printk("DataRequest ");
554 if (stat & 0x04) printk("CorrectedError ");
555 if (stat & 0x02) printk("Index ");
556 if (stat & 0x01) printk("Error ");
560 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
561 if (err & 0x04) printk("DriveStatusError ");
563 if (err & 0x04) printk("BadCRC ");
564 else printk("Sector ");
566 if (err & 0x40) printk("UncorrectableError ");
567 if (err & 0x10) printk("SectorIdNotFound ");
568 if (err & 0x02) printk("TrackZeroNotFound ");
569 if (err & 0x01) printk("AddrMarkNotFound ");
576 * ata_to_sense_error - convert ATA error to SCSI error
577 * @id: ATA device number
578 * @drv_stat: value contained in ATA status register
579 * @drv_err: value contained in ATA error register
580 * @sk: the sense key we'll fill out
581 * @asc: the additional sense code we'll fill out
582 * @ascq: the additional sense code qualifier we'll fill out
583 * @verbose: be verbose
585 * Converts an ATA error into a SCSI error. Fill out pointers to
586 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
587 * format sense blocks.
590 * spin_lock_irqsave(host lock)
592 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
593 u8 *asc, u8 *ascq, int verbose)
597 /* Based on the 3ware driver translation table */
598 static const unsigned char sense_table[][4] = {
600 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
602 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
604 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
605 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
606 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
607 /* MC|ID|ABRT|TRK0|MARK */
608 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
610 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
611 /* Bad address mark */
612 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
614 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
616 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
617 /* Media change request */
618 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
620 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
622 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
624 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
625 /* BBD - block marked bad */
626 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
627 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
629 static const unsigned char stat_table[][4] = {
630 /* Must be first because BUSY means no other bits valid */
631 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
632 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
633 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
634 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
635 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
639 * Is this an error we can process/parse
641 if (drv_stat & ATA_BUSY) {
642 drv_err = 0; /* Ignore the err bits, they're invalid */
646 /* Look for drv_err */
647 for (i = 0; sense_table[i][0] != 0xFF; i++) {
648 /* Look for best matches first */
649 if ((sense_table[i][0] & drv_err) ==
651 *sk = sense_table[i][1];
652 *asc = sense_table[i][2];
653 *ascq = sense_table[i][3];
657 /* No immediate match */
659 printk(KERN_WARNING "ata%u: no sense translation for "
660 "error 0x%02x\n", id, drv_err);
663 /* Fall back to interpreting status bits */
664 for (i = 0; stat_table[i][0] != 0xFF; i++) {
665 if (stat_table[i][0] & drv_stat) {
666 *sk = stat_table[i][1];
667 *asc = stat_table[i][2];
668 *ascq = stat_table[i][3];
672 /* No error? Undecoded? */
674 printk(KERN_WARNING "ata%u: no sense translation for "
675 "status: 0x%02x\n", id, drv_stat);
677 /* We need a sensible error return here, which is tricky, and one
678 that won't cause people to do things like return a disk wrongly */
679 *sk = ABORTED_COMMAND;
685 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
686 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
687 id, drv_stat, drv_err, *sk, *asc, *ascq);
692 * ata_gen_passthru_sense - Generate check condition sense block.
693 * @qc: Command that completed.
695 * This function is specific to the ATA descriptor format sense
696 * block specified for the ATA pass through commands. Regardless
697 * of whether the command errored or not, return a sense
698 * block. Copy all controller registers into the sense
699 * block. Clear sense key, ASC & ASCQ if there is no error.
704 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
706 struct scsi_cmnd *cmd = qc->scsicmd;
707 struct ata_taskfile *tf = &qc->result_tf;
708 unsigned char *sb = cmd->sense_buffer;
709 unsigned char *desc = sb + 8;
710 int verbose = qc->ap->ops->error_handler == NULL;
712 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
714 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
717 * Use ata_to_sense_error() to map status register bits
718 * onto sense key, asc & ascq.
721 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
722 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
723 &sb[1], &sb[2], &sb[3], verbose);
728 * Sense data is current and format is descriptor.
734 /* set length of additional sense data */
739 * Copy registers into sense buffer.
742 desc[3] = tf->feature; /* == error reg */
747 desc[12] = tf->device;
748 desc[13] = tf->command; /* == status reg */
751 * Fill in Extend bit, and the high order bytes
754 if (tf->flags & ATA_TFLAG_LBA48) {
756 desc[4] = tf->hob_nsect;
757 desc[6] = tf->hob_lbal;
758 desc[8] = tf->hob_lbam;
759 desc[10] = tf->hob_lbah;
764 * ata_gen_ata_sense - generate a SCSI fixed sense block
765 * @qc: Command that we are erroring out
767 * Generate sense block for a failed ATA command @qc. Descriptor
768 * format is used to accomodate LBA48 block address.
773 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
775 struct ata_device *dev = qc->dev;
776 struct scsi_cmnd *cmd = qc->scsicmd;
777 struct ata_taskfile *tf = &qc->result_tf;
778 unsigned char *sb = cmd->sense_buffer;
779 unsigned char *desc = sb + 8;
780 int verbose = qc->ap->ops->error_handler == NULL;
783 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
785 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
787 /* sense data is current and format is descriptor */
790 /* Use ata_to_sense_error() to map status register bits
791 * onto sense key, asc & ascq.
794 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
795 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
796 &sb[1], &sb[2], &sb[3], verbose);
800 block = ata_tf_read_block(&qc->result_tf, dev);
802 /* information sense data descriptor */
807 desc[2] |= 0x80; /* valid */
808 desc[6] = block >> 40;
809 desc[7] = block >> 32;
810 desc[8] = block >> 24;
811 desc[9] = block >> 16;
812 desc[10] = block >> 8;
816 static void ata_scsi_sdev_config(struct scsi_device *sdev)
818 sdev->use_10_for_rw = 1;
819 sdev->use_10_for_ms = 1;
821 /* Schedule policy is determined by ->qc_defer() callback and
822 * it needs to see every deferred qc. Set dev_blocked to 1 to
823 * prevent SCSI midlayer from automatically deferring
826 sdev->max_device_blocked = 1;
828 /* set the min alignment */
829 blk_queue_update_dma_alignment(sdev->request_queue, ATA_DMA_PAD_SZ - 1);
832 static void ata_scsi_dev_config(struct scsi_device *sdev,
833 struct ata_device *dev)
835 /* configure max sectors */
836 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
838 /* SATA DMA transfers must be multiples of 4 byte, so
839 * we need to pad ATAPI transfers using an extra sg.
840 * Decrement max hw segments accordingly.
842 if (dev->class == ATA_DEV_ATAPI) {
843 struct request_queue *q = sdev->request_queue;
844 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
847 if (dev->flags & ATA_DFLAG_AN)
848 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
850 if (dev->flags & ATA_DFLAG_NCQ) {
853 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
854 depth = min(ATA_MAX_QUEUE - 1, depth);
855 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
860 * ata_scsi_slave_config - Set SCSI device attributes
861 * @sdev: SCSI device to examine
863 * This is called before we actually start reading
864 * and writing to the device, to configure certain
865 * SCSI mid-layer behaviors.
868 * Defined by SCSI layer. We don't really care.
871 int ata_scsi_slave_config(struct scsi_device *sdev)
873 struct ata_port *ap = ata_shost_to_port(sdev->host);
874 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
876 ata_scsi_sdev_config(sdev);
878 if (dev->class == ATA_DEV_ATA)
879 sdev->manage_start_stop = 1;
882 ata_scsi_dev_config(sdev, dev);
888 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
889 * @sdev: SCSI device to be destroyed
891 * @sdev is about to be destroyed for hot/warm unplugging. If
892 * this unplugging was initiated by libata as indicated by NULL
893 * dev->sdev, this function doesn't have to do anything.
894 * Otherwise, SCSI layer initiated warm-unplug is in progress.
895 * Clear dev->sdev, schedule the device for ATA detach and invoke
899 * Defined by SCSI layer. We don't really care.
901 void ata_scsi_slave_destroy(struct scsi_device *sdev)
903 struct ata_port *ap = ata_shost_to_port(sdev->host);
905 struct ata_device *dev;
907 if (!ap->ops->error_handler)
910 spin_lock_irqsave(ap->lock, flags);
911 dev = __ata_scsi_find_dev(ap, sdev);
912 if (dev && dev->sdev) {
913 /* SCSI device already in CANCEL state, no need to offline it */
915 dev->flags |= ATA_DFLAG_DETACH;
916 ata_port_schedule_eh(ap);
918 spin_unlock_irqrestore(ap->lock, flags);
922 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
923 * @sdev: SCSI device to configure queue depth for
924 * @queue_depth: new queue depth
926 * This is libata standard hostt->change_queue_depth callback.
927 * SCSI will call into this callback when user tries to set queue
931 * SCSI layer (we don't care)
934 * Newly configured queue depth.
936 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
938 struct ata_port *ap = ata_shost_to_port(sdev->host);
939 struct ata_device *dev;
942 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
943 return sdev->queue_depth;
945 dev = ata_scsi_find_dev(ap, sdev);
946 if (!dev || !ata_dev_enabled(dev))
947 return sdev->queue_depth;
950 spin_lock_irqsave(ap->lock, flags);
951 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
952 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
953 dev->flags |= ATA_DFLAG_NCQ_OFF;
956 spin_unlock_irqrestore(ap->lock, flags);
958 /* limit and apply queue depth */
959 queue_depth = min(queue_depth, sdev->host->can_queue);
960 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
961 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
963 if (sdev->queue_depth == queue_depth)
966 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
970 /* XXX: for spindown warning */
971 static void ata_delayed_done_timerfn(unsigned long arg)
973 struct scsi_cmnd *scmd = (void *)arg;
975 scmd->scsi_done(scmd);
978 /* XXX: for spindown warning */
979 static void ata_delayed_done(struct scsi_cmnd *scmd)
981 static struct timer_list timer;
983 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
984 mod_timer(&timer, jiffies + 5 * HZ);
988 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
989 * @qc: Storage for translated ATA taskfile
991 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
992 * (to start). Perhaps these commands should be preceded by
993 * CHECK POWER MODE to see what power mode the device is already in.
994 * [See SAT revision 5 at www.t10.org]
997 * spin_lock_irqsave(host lock)
1000 * Zero on success, non-zero on error.
1002 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1004 struct scsi_cmnd *scmd = qc->scsicmd;
1005 struct ata_taskfile *tf = &qc->tf;
1006 const u8 *cdb = scmd->cmnd;
1008 if (scmd->cmd_len < 5)
1011 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1012 tf->protocol = ATA_PROT_NODATA;
1014 ; /* ignore IMMED bit, violates sat-r05 */
1017 goto invalid_fld; /* LOEJ bit set not supported */
1018 if (((cdb[4] >> 4) & 0xf) != 0)
1019 goto invalid_fld; /* power conditions not supported */
1021 if (qc->dev->horkage & ATA_HORKAGE_SKIP_PM) {
1022 /* the device lacks PM support, finish without doing anything */
1023 scmd->result = SAM_STAT_GOOD;
1028 tf->nsect = 1; /* 1 sector, lba=0 */
1030 if (qc->dev->flags & ATA_DFLAG_LBA) {
1031 tf->flags |= ATA_TFLAG_LBA;
1036 tf->device |= ATA_LBA;
1039 tf->lbal = 0x1; /* sect */
1040 tf->lbam = 0x0; /* cyl low */
1041 tf->lbah = 0x0; /* cyl high */
1044 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1046 /* XXX: This is for backward compatibility, will be
1047 * removed. Read Documentation/feature-removal-schedule.txt
1050 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
1051 (system_state == SYSTEM_HALT ||
1052 system_state == SYSTEM_POWER_OFF)) {
1053 static unsigned long warned;
1055 if (!test_and_set_bit(0, &warned)) {
1056 ata_dev_printk(qc->dev, KERN_WARNING,
1057 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
1058 "UPDATE SHUTDOWN UTILITY\n");
1059 ata_dev_printk(qc->dev, KERN_WARNING,
1060 "For more info, visit "
1061 "http://linux-ata.org/shutdown.html\n");
1063 /* ->scsi_done is not used, use it for
1064 * delayed completion.
1066 scmd->scsi_done = qc->scsidone;
1067 qc->scsidone = ata_delayed_done;
1069 scmd->result = SAM_STAT_GOOD;
1073 /* Issue ATA STANDBY IMMEDIATE command */
1074 tf->command = ATA_CMD_STANDBYNOW1;
1078 * Standby and Idle condition timers could be implemented but that
1079 * would require libata to implement the Power condition mode page
1080 * and allow the user to change it. Changing mode pages requires
1081 * MODE SELECT to be implemented.
1087 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1088 /* "Invalid field in cbd" */
1094 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1095 * @qc: Storage for translated ATA taskfile
1097 * Sets up an ATA taskfile to issue FLUSH CACHE or
1101 * spin_lock_irqsave(host lock)
1104 * Zero on success, non-zero on error.
1106 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1108 struct ata_taskfile *tf = &qc->tf;
1110 tf->flags |= ATA_TFLAG_DEVICE;
1111 tf->protocol = ATA_PROT_NODATA;
1113 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1114 tf->command = ATA_CMD_FLUSH_EXT;
1116 tf->command = ATA_CMD_FLUSH;
1118 /* flush is critical for IO integrity, consider it an IO command */
1119 qc->flags |= ATA_QCFLAG_IO;
1125 * scsi_6_lba_len - Get LBA and transfer length
1126 * @cdb: SCSI command to translate
1128 * Calculate LBA and transfer length for 6-byte commands.
1132 * @plen: the transfer length
1134 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1139 VPRINTK("six-byte command\n");
1141 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1142 lba |= ((u64)cdb[2]) << 8;
1143 lba |= ((u64)cdb[3]);
1152 * scsi_10_lba_len - Get LBA and transfer length
1153 * @cdb: SCSI command to translate
1155 * Calculate LBA and transfer length for 10-byte commands.
1159 * @plen: the transfer length
1161 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1166 VPRINTK("ten-byte command\n");
1168 lba |= ((u64)cdb[2]) << 24;
1169 lba |= ((u64)cdb[3]) << 16;
1170 lba |= ((u64)cdb[4]) << 8;
1171 lba |= ((u64)cdb[5]);
1173 len |= ((u32)cdb[7]) << 8;
1174 len |= ((u32)cdb[8]);
1181 * scsi_16_lba_len - Get LBA and transfer length
1182 * @cdb: SCSI command to translate
1184 * Calculate LBA and transfer length for 16-byte commands.
1188 * @plen: the transfer length
1190 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1195 VPRINTK("sixteen-byte command\n");
1197 lba |= ((u64)cdb[2]) << 56;
1198 lba |= ((u64)cdb[3]) << 48;
1199 lba |= ((u64)cdb[4]) << 40;
1200 lba |= ((u64)cdb[5]) << 32;
1201 lba |= ((u64)cdb[6]) << 24;
1202 lba |= ((u64)cdb[7]) << 16;
1203 lba |= ((u64)cdb[8]) << 8;
1204 lba |= ((u64)cdb[9]);
1206 len |= ((u32)cdb[10]) << 24;
1207 len |= ((u32)cdb[11]) << 16;
1208 len |= ((u32)cdb[12]) << 8;
1209 len |= ((u32)cdb[13]);
1216 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1217 * @qc: Storage for translated ATA taskfile
1219 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1222 * spin_lock_irqsave(host lock)
1225 * Zero on success, non-zero on error.
1227 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1229 struct scsi_cmnd *scmd = qc->scsicmd;
1230 struct ata_taskfile *tf = &qc->tf;
1231 struct ata_device *dev = qc->dev;
1232 u64 dev_sectors = qc->dev->n_sectors;
1233 const u8 *cdb = scmd->cmnd;
1237 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1238 tf->protocol = ATA_PROT_NODATA;
1240 if (cdb[0] == VERIFY) {
1241 if (scmd->cmd_len < 10)
1243 scsi_10_lba_len(cdb, &block, &n_block);
1244 } else if (cdb[0] == VERIFY_16) {
1245 if (scmd->cmd_len < 16)
1247 scsi_16_lba_len(cdb, &block, &n_block);
1253 if (block >= dev_sectors)
1255 if ((block + n_block) > dev_sectors)
1258 if (dev->flags & ATA_DFLAG_LBA) {
1259 tf->flags |= ATA_TFLAG_LBA;
1261 if (lba_28_ok(block, n_block)) {
1263 tf->command = ATA_CMD_VERIFY;
1264 tf->device |= (block >> 24) & 0xf;
1265 } else if (lba_48_ok(block, n_block)) {
1266 if (!(dev->flags & ATA_DFLAG_LBA48))
1270 tf->flags |= ATA_TFLAG_LBA48;
1271 tf->command = ATA_CMD_VERIFY_EXT;
1273 tf->hob_nsect = (n_block >> 8) & 0xff;
1275 tf->hob_lbah = (block >> 40) & 0xff;
1276 tf->hob_lbam = (block >> 32) & 0xff;
1277 tf->hob_lbal = (block >> 24) & 0xff;
1279 /* request too large even for LBA48 */
1282 tf->nsect = n_block & 0xff;
1284 tf->lbah = (block >> 16) & 0xff;
1285 tf->lbam = (block >> 8) & 0xff;
1286 tf->lbal = block & 0xff;
1288 tf->device |= ATA_LBA;
1291 u32 sect, head, cyl, track;
1293 if (!lba_28_ok(block, n_block))
1296 /* Convert LBA to CHS */
1297 track = (u32)block / dev->sectors;
1298 cyl = track / dev->heads;
1299 head = track % dev->heads;
1300 sect = (u32)block % dev->sectors + 1;
1302 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1303 (u32)block, track, cyl, head, sect);
1305 /* Check whether the converted CHS can fit.
1309 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1312 tf->command = ATA_CMD_VERIFY;
1313 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1316 tf->lbah = cyl >> 8;
1323 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1324 /* "Invalid field in cbd" */
1328 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1329 /* "Logical Block Address out of range" */
1333 scmd->result = SAM_STAT_GOOD;
1338 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1339 * @qc: Storage for translated ATA taskfile
1341 * Converts any of six SCSI read/write commands into the
1342 * ATA counterpart, including starting sector (LBA),
1343 * sector count, and taking into account the device's LBA48
1346 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1347 * %WRITE_16 are currently supported.
1350 * spin_lock_irqsave(host lock)
1353 * Zero on success, non-zero on error.
1355 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1357 struct scsi_cmnd *scmd = qc->scsicmd;
1358 const u8 *cdb = scmd->cmnd;
1359 unsigned int tf_flags = 0;
1364 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1365 tf_flags |= ATA_TFLAG_WRITE;
1367 /* Calculate the SCSI LBA, transfer length and FUA. */
1371 if (unlikely(scmd->cmd_len < 10))
1373 scsi_10_lba_len(cdb, &block, &n_block);
1374 if (unlikely(cdb[1] & (1 << 3)))
1375 tf_flags |= ATA_TFLAG_FUA;
1379 if (unlikely(scmd->cmd_len < 6))
1381 scsi_6_lba_len(cdb, &block, &n_block);
1383 /* for 6-byte r/w commands, transfer length 0
1384 * means 256 blocks of data, not 0 block.
1391 if (unlikely(scmd->cmd_len < 16))
1393 scsi_16_lba_len(cdb, &block, &n_block);
1394 if (unlikely(cdb[1] & (1 << 3)))
1395 tf_flags |= ATA_TFLAG_FUA;
1398 DPRINTK("no-byte command\n");
1402 /* Check and compose ATA command */
1404 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1405 * length 0 means transfer 0 block of data.
1406 * However, for ATA R/W commands, sector count 0 means
1407 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1409 * WARNING: one or two older ATA drives treat 0 as 0...
1413 qc->flags |= ATA_QCFLAG_IO;
1414 qc->nbytes = n_block * ATA_SECT_SIZE;
1416 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1418 if (likely(rc == 0))
1423 /* treat all other errors as -EINVAL, fall through */
1425 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1426 /* "Invalid field in cbd" */
1430 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1431 /* "Logical Block Address out of range" */
1435 scmd->result = SAM_STAT_GOOD;
1439 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1441 struct ata_port *ap = qc->ap;
1442 struct scsi_cmnd *cmd = qc->scsicmd;
1443 u8 *cdb = cmd->cmnd;
1444 int need_sense = (qc->err_mask != 0);
1446 /* For ATA pass thru (SAT) commands, generate a sense block if
1447 * user mandated it or if there's an error. Note that if we
1448 * generate because the user forced us to, a check condition
1449 * is generated and the ATA register values are returned
1450 * whether the command completed successfully or not. If there
1451 * was no error, SK, ASC and ASCQ will all be zero.
1453 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1454 ((cdb[2] & 0x20) || need_sense)) {
1455 ata_gen_passthru_sense(qc);
1458 cmd->result = SAM_STAT_GOOD;
1460 /* TODO: decide which descriptor format to use
1461 * for 48b LBA devices and call that here
1462 * instead of the fixed desc, which is only
1463 * good for smaller LBA (and maybe CHS?)
1466 ata_gen_ata_sense(qc);
1470 /* XXX: track spindown state for spindown skipping and warning */
1471 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1472 qc->tf.command == ATA_CMD_STANDBYNOW1))
1473 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1474 else if (likely(system_state != SYSTEM_HALT &&
1475 system_state != SYSTEM_POWER_OFF))
1476 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1478 if (need_sense && !ap->ops->error_handler)
1479 ata_dump_status(ap->print_id, &qc->result_tf);
1487 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1488 * @dev: ATA device to which the command is addressed
1489 * @cmd: SCSI command to execute
1490 * @done: SCSI command completion function
1491 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1493 * Our ->queuecommand() function has decided that the SCSI
1494 * command issued can be directly translated into an ATA
1495 * command, rather than handled internally.
1497 * This function sets up an ata_queued_cmd structure for the
1498 * SCSI command, and sends that ata_queued_cmd to the hardware.
1500 * The xlat_func argument (actor) returns 0 if ready to execute
1501 * ATA command, else 1 to finish translation. If 1 is returned
1502 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1503 * to be set reflecting an error condition or clean (early)
1507 * spin_lock_irqsave(host lock)
1510 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1511 * needs to be deferred.
1513 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1514 void (*done)(struct scsi_cmnd *),
1515 ata_xlat_func_t xlat_func)
1517 struct ata_port *ap = dev->link->ap;
1518 struct ata_queued_cmd *qc;
1523 qc = ata_scsi_qc_new(dev, cmd, done);
1527 /* data is present; dma-map it */
1528 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1529 cmd->sc_data_direction == DMA_TO_DEVICE) {
1530 if (unlikely(scsi_bufflen(cmd) < 1)) {
1531 ata_dev_printk(dev, KERN_WARNING,
1532 "WARNING: zero len r/w req\n");
1536 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1538 qc->dma_dir = cmd->sc_data_direction;
1541 qc->complete_fn = ata_scsi_qc_complete;
1546 if (ap->ops->qc_defer) {
1547 if ((rc = ap->ops->qc_defer(qc)))
1551 /* select device, send command to hardware */
1560 DPRINTK("EXIT - early finish (good or error)\n");
1565 cmd->result = (DID_ERROR << 16);
1568 DPRINTK("EXIT - internal\n");
1573 DPRINTK("EXIT - defer\n");
1574 if (rc == ATA_DEFER_LINK)
1575 return SCSI_MLQUEUE_DEVICE_BUSY;
1577 return SCSI_MLQUEUE_HOST_BUSY;
1581 * ata_scsi_rbuf_get - Map response buffer.
1582 * @cmd: SCSI command containing buffer to be mapped.
1583 * @buf_out: Pointer to mapped area.
1585 * Maps buffer contained within SCSI command @cmd.
1588 * spin_lock_irqsave(host lock)
1591 * Length of response buffer.
1594 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1597 unsigned int buflen;
1599 struct scatterlist *sg = scsi_sglist(cmd);
1602 buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
1603 buflen = sg->length;
1614 * ata_scsi_rbuf_put - Unmap response buffer.
1615 * @cmd: SCSI command containing buffer to be unmapped.
1616 * @buf: buffer to unmap
1618 * Unmaps response buffer contained within @cmd.
1621 * spin_lock_irqsave(host lock)
1624 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1626 struct scatterlist *sg = scsi_sglist(cmd);
1628 kunmap_atomic(buf - sg->offset, KM_IRQ0);
1632 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1633 * @args: device IDENTIFY data / SCSI command of interest.
1634 * @actor: Callback hook for desired SCSI command simulator
1636 * Takes care of the hard work of simulating a SCSI command...
1637 * Mapping the response buffer, calling the command's handler,
1638 * and handling the handler's return value. This return value
1639 * indicates whether the handler wishes the SCSI command to be
1640 * completed successfully (0), or not (in which case cmd->result
1641 * and sense buffer are assumed to be set).
1644 * spin_lock_irqsave(host lock)
1647 void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1648 unsigned int (*actor) (struct ata_scsi_args *args,
1649 u8 *rbuf, unsigned int buflen))
1652 unsigned int buflen, rc;
1653 struct scsi_cmnd *cmd = args->cmd;
1655 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1656 memset(rbuf, 0, buflen);
1657 rc = actor(args, rbuf, buflen);
1658 ata_scsi_rbuf_put(cmd, rbuf);
1661 cmd->result = SAM_STAT_GOOD;
1666 * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer
1667 * @idx: byte index into SCSI response buffer
1668 * @val: value to set
1670 * To be used by SCSI command simulator functions. This macros
1671 * expects two local variables, u8 *rbuf and unsigned int buflen,
1677 #define ATA_SCSI_RBUF_SET(idx, val) do { \
1678 if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \
1682 * ata_scsiop_inq_std - Simulate INQUIRY command
1683 * @args: device IDENTIFY data / SCSI command of interest.
1684 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1685 * @buflen: Response buffer length.
1687 * Returns standard device identification data associated
1688 * with non-VPD INQUIRY command output.
1691 * spin_lock_irqsave(host lock)
1694 unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1695 unsigned int buflen)
1700 0x5, /* claim SPC-3 version compatibility */
1705 /* set scsi removeable (RMB) bit per ata bit */
1706 if (ata_id_removeable(args->id))
1711 memcpy(rbuf, hdr, sizeof(hdr));
1714 memcpy(&rbuf[8], "ATA ", 8);
1715 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1716 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1717 if (rbuf[32] == 0 || rbuf[32] == ' ')
1718 memcpy(&rbuf[32], "n/a ", 4);
1722 const u8 versions[] = {
1723 0x60, /* SAM-3 (no version claimed) */
1726 0x20, /* SBC-2 (no version claimed) */
1729 0x60 /* SPC-3 (no version claimed) */
1732 memcpy(rbuf + 59, versions, sizeof(versions));
1739 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1740 * @args: device IDENTIFY data / SCSI command of interest.
1741 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1742 * @buflen: Response buffer length.
1744 * Returns list of inquiry VPD pages available.
1747 * spin_lock_irqsave(host lock)
1750 unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1751 unsigned int buflen)
1753 const u8 pages[] = {
1754 0x00, /* page 0x00, this page */
1755 0x80, /* page 0x80, unit serial no page */
1756 0x83 /* page 0x83, device ident page */
1758 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1761 memcpy(rbuf + 4, pages, sizeof(pages));
1767 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1768 * @args: device IDENTIFY data / SCSI command of interest.
1769 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1770 * @buflen: Response buffer length.
1772 * Returns ATA device serial number.
1775 * spin_lock_irqsave(host lock)
1778 unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1779 unsigned int buflen)
1783 0x80, /* this page code */
1785 ATA_ID_SERNO_LEN, /* page len */
1787 memcpy(rbuf, hdr, sizeof(hdr));
1789 if (buflen > (ATA_ID_SERNO_LEN + 4 - 1))
1790 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1791 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1797 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1798 * @args: device IDENTIFY data / SCSI command of interest.
1799 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1800 * @buflen: Response buffer length.
1802 * Yields two logical unit device identification designators:
1803 * - vendor specific ASCII containing the ATA serial number
1804 * - SAT defined "t10 vendor id based" containing ASCII vendor
1805 * name ("ATA "), model and serial numbers.
1808 * spin_lock_irqsave(host lock)
1811 unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1812 unsigned int buflen)
1815 const int sat_model_serial_desc_len = 68;
1817 rbuf[1] = 0x83; /* this page code */
1820 if (buflen > (ATA_ID_SERNO_LEN + num + 3)) {
1821 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1823 rbuf[num + 3] = ATA_ID_SERNO_LEN;
1825 ata_id_string(args->id, (unsigned char *) rbuf + num,
1826 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1827 num += ATA_ID_SERNO_LEN;
1829 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1830 /* SAT defined lu model and serial numbers descriptor */
1831 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1834 rbuf[num + 3] = sat_model_serial_desc_len;
1836 memcpy(rbuf + num, "ATA ", 8);
1838 ata_id_string(args->id, (unsigned char *) rbuf + num,
1839 ATA_ID_PROD, ATA_ID_PROD_LEN);
1840 num += ATA_ID_PROD_LEN;
1841 ata_id_string(args->id, (unsigned char *) rbuf + num,
1842 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1843 num += ATA_ID_SERNO_LEN;
1845 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1850 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
1851 * @args: device IDENTIFY data / SCSI command of interest.
1852 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1853 * @buflen: Response buffer length.
1855 * Yields SAT-specified ATA VPD page.
1858 * spin_lock_irqsave(host lock)
1861 unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf,
1862 unsigned int buflen)
1865 struct ata_taskfile tf;
1871 memset(&pbuf, 0, sizeof(pbuf));
1872 memset(&tf, 0, sizeof(tf));
1874 pbuf[1] = 0x89; /* our page code */
1875 pbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
1876 pbuf[3] = (0x238 & 0xff);
1878 memcpy(&pbuf[8], "linux ", 8);
1879 memcpy(&pbuf[16], "libata ", 16);
1880 memcpy(&pbuf[32], DRV_VERSION, 4);
1881 ata_id_string(args->id, &pbuf[32], ATA_ID_FW_REV, 4);
1883 /* we don't store the ATA device signature, so we fake it */
1885 tf.command = ATA_DRDY; /* really, this is Status reg */
1889 ata_tf_to_fis(&tf, 0, 1, &pbuf[36]); /* TODO: PMP? */
1890 pbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
1892 pbuf[56] = ATA_CMD_ID_ATA;
1894 i = min(buflen, 60U);
1895 memcpy(rbuf, &pbuf[0], i);
1901 memcpy(&rbuf[60], &args->id[0], min(buflen, 512U));
1906 * ata_scsiop_noop - Command handler that simply returns success.
1907 * @args: device IDENTIFY data / SCSI command of interest.
1908 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1909 * @buflen: Response buffer length.
1911 * No operation. Simply returns success to caller, to indicate
1912 * that the caller should successfully complete this SCSI command.
1915 * spin_lock_irqsave(host lock)
1918 unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1919 unsigned int buflen)
1926 * ata_msense_push - Push data onto MODE SENSE data output buffer
1927 * @ptr_io: (input/output) Location to store more output data
1928 * @last: End of output data buffer
1929 * @buf: Pointer to BLOB being added to output buffer
1930 * @buflen: Length of BLOB
1932 * Store MODE SENSE data on an output buffer.
1938 static void ata_msense_push(u8 **ptr_io, const u8 *last,
1939 const u8 *buf, unsigned int buflen)
1943 if ((ptr + buflen - 1) > last)
1946 memcpy(ptr, buf, buflen);
1954 * ata_msense_caching - Simulate MODE SENSE caching info page
1955 * @id: device IDENTIFY data
1956 * @ptr_io: (input/output) Location to store more output data
1957 * @last: End of output data buffer
1959 * Generate a caching info page, which conditionally indicates
1960 * write caching to the SCSI layer, depending on device
1967 static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1970 u8 page[CACHE_MPAGE_LEN];
1972 memcpy(page, def_cache_mpage, sizeof(page));
1973 if (ata_id_wcache_enabled(id))
1974 page[2] |= (1 << 2); /* write cache enable */
1975 if (!ata_id_rahead_enabled(id))
1976 page[12] |= (1 << 5); /* disable read ahead */
1978 ata_msense_push(ptr_io, last, page, sizeof(page));
1979 return sizeof(page);
1983 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1984 * @dev: Device associated with this MODE SENSE command
1985 * @ptr_io: (input/output) Location to store more output data
1986 * @last: End of output data buffer
1988 * Generate a generic MODE SENSE control mode page.
1994 static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1996 ata_msense_push(ptr_io, last, def_control_mpage,
1997 sizeof(def_control_mpage));
1998 return sizeof(def_control_mpage);
2002 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2003 * @dev: Device associated with this MODE SENSE command
2004 * @ptr_io: (input/output) Location to store more output data
2005 * @last: End of output data buffer
2007 * Generate a generic MODE SENSE r/w error recovery page.
2013 static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
2016 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
2017 sizeof(def_rw_recovery_mpage));
2018 return sizeof(def_rw_recovery_mpage);
2022 * We can turn this into a real blacklist if it's needed, for now just
2023 * blacklist any Maxtor BANC1G10 revision firmware
2025 static int ata_dev_supports_fua(u16 *id)
2027 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2031 if (!ata_id_has_fua(id))
2034 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2035 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2037 if (strcmp(model, "Maxtor"))
2039 if (strcmp(fw, "BANC1G10"))
2042 return 0; /* blacklisted */
2046 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2047 * @args: device IDENTIFY data / SCSI command of interest.
2048 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2049 * @buflen: Response buffer length.
2051 * Simulate MODE SENSE commands. Assume this is invoked for direct
2052 * access devices (e.g. disks) only. There should be no block
2053 * descriptor for other device types.
2056 * spin_lock_irqsave(host lock)
2059 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
2060 unsigned int buflen)
2062 struct ata_device *dev = args->dev;
2063 u8 *scsicmd = args->cmd->cmnd, *p, *last;
2064 const u8 sat_blk_desc[] = {
2065 0, 0, 0, 0, /* number of blocks: sat unspecified */
2067 0, 0x2, 0x0 /* block length: 512 bytes */
2070 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
2075 six_byte = (scsicmd[0] == MODE_SENSE);
2076 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2078 * LLBA bit in msense(10) ignored (compliant)
2081 page_control = scsicmd[2] >> 6;
2082 switch (page_control) {
2083 case 0: /* current */
2084 break; /* supported */
2086 goto saving_not_supp;
2087 case 1: /* changeable */
2088 case 2: /* defaults */
2094 output_len = 4 + (ebd ? 8 : 0);
2095 alloc_len = scsicmd[4];
2097 output_len = 8 + (ebd ? 8 : 0);
2098 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2100 minlen = (alloc_len < buflen) ? alloc_len : buflen;
2102 p = rbuf + output_len;
2103 last = rbuf + minlen - 1;
2105 pg = scsicmd[2] & 0x3f;
2108 * No mode subpages supported (yet) but asking for _all_
2109 * subpages may be valid
2111 if (spg && (spg != ALL_SUB_MPAGES))
2115 case RW_RECOVERY_MPAGE:
2116 output_len += ata_msense_rw_recovery(&p, last);
2120 output_len += ata_msense_caching(args->id, &p, last);
2123 case CONTROL_MPAGE: {
2124 output_len += ata_msense_ctl_mode(&p, last);
2129 output_len += ata_msense_rw_recovery(&p, last);
2130 output_len += ata_msense_caching(args->id, &p, last);
2131 output_len += ata_msense_ctl_mode(&p, last);
2134 default: /* invalid page code */
2142 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2143 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2148 rbuf[0] = output_len;
2153 rbuf[3] = sizeof(sat_blk_desc);
2155 memcpy(rbuf + 4, sat_blk_desc,
2156 sizeof(sat_blk_desc));
2160 rbuf[0] = output_len >> 8;
2162 rbuf[1] = output_len;
2167 rbuf[7] = sizeof(sat_blk_desc);
2169 memcpy(rbuf + 8, sat_blk_desc,
2170 sizeof(sat_blk_desc));
2176 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2177 /* "Invalid field in cbd" */
2181 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2182 /* "Saving parameters not supported" */
2187 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2188 * @args: device IDENTIFY data / SCSI command of interest.
2189 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2190 * @buflen: Response buffer length.
2192 * Simulate READ CAPACITY commands.
2197 unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2198 unsigned int buflen)
2200 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
2204 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2205 if (last_lba >= 0xffffffffULL)
2206 last_lba = 0xffffffff;
2208 /* sector count, 32-bit */
2209 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3));
2210 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2));
2211 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1));
2212 ATA_SCSI_RBUF_SET(3, last_lba);
2215 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8);
2216 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE);
2218 /* sector count, 64-bit */
2219 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7));
2220 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6));
2221 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5));
2222 ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4));
2223 ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3));
2224 ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2));
2225 ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1));
2226 ATA_SCSI_RBUF_SET(7, last_lba);
2229 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8);
2230 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE);
2237 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2238 * @args: device IDENTIFY data / SCSI command of interest.
2239 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2240 * @buflen: Response buffer length.
2242 * Simulate REPORT LUNS command.
2245 * spin_lock_irqsave(host lock)
2248 unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2249 unsigned int buflen)
2252 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2258 * ata_scsi_set_sense - Set SCSI sense data and status
2259 * @cmd: SCSI request to be handled
2260 * @sk: SCSI-defined sense key
2261 * @asc: SCSI-defined additional sense code
2262 * @ascq: SCSI-defined additional sense code qualifier
2264 * Helper function that builds a valid fixed format, current
2265 * response code and the given sense key (sk), additional sense
2266 * code (asc) and additional sense code qualifier (ascq) with
2267 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2268 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2274 void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2276 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2278 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2279 cmd->sense_buffer[2] = sk;
2280 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2281 cmd->sense_buffer[12] = asc;
2282 cmd->sense_buffer[13] = ascq;
2286 * ata_scsi_badcmd - End a SCSI request with an error
2287 * @cmd: SCSI request to be handled
2288 * @done: SCSI command completion function
2289 * @asc: SCSI-defined additional sense code
2290 * @ascq: SCSI-defined additional sense code qualifier
2292 * Helper function that completes a SCSI command with
2293 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2294 * and the specified additional sense codes.
2297 * spin_lock_irqsave(host lock)
2300 void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2303 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
2308 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2310 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2311 /* FIXME: not quite right; we don't want the
2312 * translation of taskfile registers into
2313 * a sense descriptors, since that's only
2314 * correct for ATA, not ATAPI
2316 ata_gen_passthru_sense(qc);
2319 qc->scsidone(qc->scsicmd);
2323 /* is it pointless to prefer PIO for "safety reasons"? */
2324 static inline int ata_pio_use_silly(struct ata_port *ap)
2326 return (ap->flags & ATA_FLAG_PIO_DMA);
2329 static void atapi_request_sense(struct ata_queued_cmd *qc)
2331 struct ata_port *ap = qc->ap;
2332 struct scsi_cmnd *cmd = qc->scsicmd;
2334 DPRINTK("ATAPI request sense\n");
2336 /* FIXME: is this needed? */
2337 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2339 ap->ops->tf_read(ap, &qc->tf);
2341 /* fill these in, for the case where they are -not- overwritten */
2342 cmd->sense_buffer[0] = 0x70;
2343 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2347 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2348 qc->dma_dir = DMA_FROM_DEVICE;
2350 memset(&qc->cdb, 0, qc->dev->cdb_len);
2351 qc->cdb[0] = REQUEST_SENSE;
2352 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2354 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2355 qc->tf.command = ATA_CMD_PACKET;
2357 if (ata_pio_use_silly(ap)) {
2358 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2359 qc->tf.feature |= ATAPI_PKT_DMA;
2361 qc->tf.protocol = ATA_PROT_ATAPI;
2362 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2365 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2367 qc->complete_fn = atapi_sense_complete;
2374 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2376 struct scsi_cmnd *cmd = qc->scsicmd;
2377 unsigned int err_mask = qc->err_mask;
2379 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2381 /* handle completion from new EH */
2382 if (unlikely(qc->ap->ops->error_handler &&
2383 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2385 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2386 /* FIXME: not quite right; we don't want the
2387 * translation of taskfile registers into a
2388 * sense descriptors, since that's only
2389 * correct for ATA, not ATAPI
2391 ata_gen_passthru_sense(qc);
2394 /* SCSI EH automatically locks door if sdev->locked is
2395 * set. Sometimes door lock request continues to
2396 * fail, for example, when no media is present. This
2397 * creates a loop - SCSI EH issues door lock which
2398 * fails and gets invoked again to acquire sense data
2399 * for the failed command.
2401 * If door lock fails, always clear sdev->locked to
2402 * avoid this infinite loop.
2404 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2405 qc->dev->sdev->locked = 0;
2407 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2413 /* successful completion or old EH failure path */
2414 if (unlikely(err_mask & AC_ERR_DEV)) {
2415 cmd->result = SAM_STAT_CHECK_CONDITION;
2416 atapi_request_sense(qc);
2418 } else if (unlikely(err_mask)) {
2419 /* FIXME: not quite right; we don't want the
2420 * translation of taskfile registers into
2421 * a sense descriptors, since that's only
2422 * correct for ATA, not ATAPI
2424 ata_gen_passthru_sense(qc);
2426 u8 *scsicmd = cmd->cmnd;
2428 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2430 unsigned int buflen;
2432 buflen = ata_scsi_rbuf_get(cmd, &buf);
2434 /* ATAPI devices typically report zero for their SCSI version,
2435 * and sometimes deviate from the spec WRT response data
2436 * format. If SCSI version is reported as zero like normal,
2437 * then we make the following fixups: 1) Fake MMC-5 version,
2438 * to indicate to the Linux scsi midlayer this is a modern
2439 * device. 2) Ensure response data format / ATAPI information
2440 * are always correct.
2447 ata_scsi_rbuf_put(cmd, buf);
2450 cmd->result = SAM_STAT_GOOD;
2457 * atapi_xlat - Initialize PACKET taskfile
2458 * @qc: command structure to be initialized
2461 * spin_lock_irqsave(host lock)
2464 * Zero on success, non-zero on failure.
2466 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2468 struct scsi_cmnd *scmd = qc->scsicmd;
2469 struct ata_device *dev = qc->dev;
2470 int using_pio = (dev->flags & ATA_DFLAG_PIO);
2471 int nodata = (scmd->sc_data_direction == DMA_NONE);
2472 unsigned int nbytes;
2474 memset(qc->cdb, 0, dev->cdb_len);
2475 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2477 qc->complete_fn = atapi_qc_complete;
2479 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2480 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2481 qc->tf.flags |= ATA_TFLAG_WRITE;
2482 DPRINTK("direction: write\n");
2485 qc->tf.command = ATA_CMD_PACKET;
2486 qc->nbytes = scsi_bufflen(scmd);
2488 /* check whether ATAPI DMA is safe */
2489 if (!using_pio && ata_check_atapi_dma(qc))
2492 /* Some controller variants snoop this value for Packet
2493 * transfers to do state machine and FIFO management. Thus we
2494 * want to set it properly, and for DMA where it is
2495 * effectively meaningless.
2497 nbytes = min(qc->nbytes, (unsigned int)63 * 1024);
2499 /* Most ATAPI devices which honor transfer chunk size don't
2500 * behave according to the spec when odd chunk size which
2501 * matches the transfer length is specified. If the number of
2502 * bytes to transfer is 2n+1. According to the spec, what
2503 * should happen is to indicate that 2n+1 is going to be
2504 * transferred and transfer 2n+2 bytes where the last byte is
2507 * In practice, this doesn't happen. ATAPI devices first
2508 * indicate and transfer 2n bytes and then indicate and
2509 * transfer 2 bytes where the last byte is padding.
2511 * This inconsistency confuses several controllers which
2512 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2513 * These controllers use actual number of transferred bytes to
2514 * update DMA poitner and transfer of 4n+2 bytes make those
2515 * controller push DMA pointer by 4n+4 bytes because SATA data
2516 * FISes are aligned to 4 bytes. This causes data corruption
2517 * and buffer overrun.
2519 * Always setting nbytes to even number solves this problem
2520 * because then ATAPI devices don't have to split data at 2n
2526 qc->tf.lbam = (nbytes & 0xFF);
2527 qc->tf.lbah = (nbytes >> 8);
2529 if (using_pio || nodata) {
2530 /* no data, or PIO data xfer */
2532 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2534 qc->tf.protocol = ATA_PROT_ATAPI;
2537 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2538 qc->tf.feature |= ATAPI_PKT_DMA;
2540 if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE))
2541 /* some SATA bridges need us to indicate data xfer direction */
2542 qc->tf.feature |= ATAPI_DMADIR;
2546 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2547 as ATAPI tape drives don't get this right otherwise */
2551 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2553 if (ap->nr_pmp_links == 0) {
2554 if (likely(devno < ata_link_max_devices(&ap->link)))
2555 return &ap->link.device[devno];
2557 if (likely(devno < ap->nr_pmp_links))
2558 return &ap->pmp_link[devno].device[0];
2564 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2565 const struct scsi_device *scsidev)
2569 /* skip commands not addressed to targets we simulate */
2570 if (ap->nr_pmp_links == 0) {
2571 if (unlikely(scsidev->channel || scsidev->lun))
2573 devno = scsidev->id;
2575 if (unlikely(scsidev->id || scsidev->lun))
2577 devno = scsidev->channel;
2580 return ata_find_dev(ap, devno);
2584 * ata_scsi_dev_enabled - determine if device is enabled
2587 * Determine if commands should be sent to the specified device.
2590 * spin_lock_irqsave(host lock)
2593 * 0 if commands are not allowed / 1 if commands are allowed
2596 static int ata_scsi_dev_enabled(struct ata_device *dev)
2598 if (unlikely(!ata_dev_enabled(dev)))
2601 if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) {
2602 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2603 ata_dev_printk(dev, KERN_WARNING,
2604 "WARNING: ATAPI is %s, device ignored.\n",
2605 atapi_enabled ? "not supported with this driver" : "disabled");
2614 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2615 * @ap: ATA port to which the device is attached
2616 * @scsidev: SCSI device from which we derive the ATA device
2618 * Given various information provided in struct scsi_cmnd,
2619 * map that onto an ATA bus, and using that mapping
2620 * determine which ata_device is associated with the
2621 * SCSI command to be sent.
2624 * spin_lock_irqsave(host lock)
2627 * Associated ATA device, or %NULL if not found.
2629 static struct ata_device *
2630 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2632 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2634 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
2641 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2642 * @byte1: Byte 1 from pass-thru CDB.
2645 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2648 ata_scsi_map_proto(u8 byte1)
2650 switch((byte1 & 0x1e) >> 1) {
2651 case 3: /* Non-data */
2652 return ATA_PROT_NODATA;
2655 case 10: /* UDMA Data-in */
2656 case 11: /* UDMA Data-Out */
2657 return ATA_PROT_DMA;
2659 case 4: /* PIO Data-in */
2660 case 5: /* PIO Data-out */
2661 return ATA_PROT_PIO;
2663 case 0: /* Hard Reset */
2665 case 8: /* Device Diagnostic */
2666 case 9: /* Device Reset */
2667 case 7: /* DMA Queued */
2668 case 12: /* FPDMA */
2669 case 15: /* Return Response Info */
2670 default: /* Reserved */
2674 return ATA_PROT_UNKNOWN;
2678 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2679 * @qc: command structure to be initialized
2681 * Handles either 12 or 16-byte versions of the CDB.
2684 * Zero on success, non-zero on failure.
2686 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2688 struct ata_taskfile *tf = &(qc->tf);
2689 struct scsi_cmnd *scmd = qc->scsicmd;
2690 struct ata_device *dev = qc->dev;
2691 const u8 *cdb = scmd->cmnd;
2693 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2696 /* We may not issue DMA commands if no DMA mode is set */
2697 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2701 * 12 and 16 byte CDBs use different offsets to
2702 * provide the various register values.
2704 if (cdb[0] == ATA_16) {
2706 * 16-byte CDB - may contain extended commands.
2708 * If that is the case, copy the upper byte register values.
2710 if (cdb[1] & 0x01) {
2711 tf->hob_feature = cdb[3];
2712 tf->hob_nsect = cdb[5];
2713 tf->hob_lbal = cdb[7];
2714 tf->hob_lbam = cdb[9];
2715 tf->hob_lbah = cdb[11];
2716 tf->flags |= ATA_TFLAG_LBA48;
2718 tf->flags &= ~ATA_TFLAG_LBA48;
2721 * Always copy low byte, device and command registers.
2723 tf->feature = cdb[4];
2728 tf->device = cdb[13];
2729 tf->command = cdb[14];
2732 * 12-byte CDB - incapable of extended commands.
2734 tf->flags &= ~ATA_TFLAG_LBA48;
2736 tf->feature = cdb[3];
2741 tf->device = cdb[8];
2742 tf->command = cdb[9];
2745 /* enforce correct master/slave bit */
2746 tf->device = dev->devno ?
2747 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2749 /* sanity check for pio multi commands */
2750 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2753 if (is_multi_taskfile(tf)) {
2754 unsigned int multi_count = 1 << (cdb[1] >> 5);
2756 /* compare the passed through multi_count
2757 * with the cached multi_count of libata
2759 if (multi_count != dev->multi_count)
2760 ata_dev_printk(dev, KERN_WARNING,
2761 "invalid multi_count %u ignored\n",
2765 /* READ/WRITE LONG use a non-standard sect_size */
2766 qc->sect_size = ATA_SECT_SIZE;
2767 switch (tf->command) {
2768 case ATA_CMD_READ_LONG:
2769 case ATA_CMD_READ_LONG_ONCE:
2770 case ATA_CMD_WRITE_LONG:
2771 case ATA_CMD_WRITE_LONG_ONCE:
2772 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2774 qc->sect_size = scsi_bufflen(scmd);
2778 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2779 * SET_FEATURES - XFER MODE must be preceded/succeeded
2780 * by an update to hardware-specific registers for each
2781 * controller (i.e. the reason for ->set_piomode(),
2782 * ->set_dmamode(), and ->post_set_mode() hooks).
2784 if ((tf->command == ATA_CMD_SET_FEATURES)
2785 && (tf->feature == SETFEATURES_XFER))
2789 * Set flags so that all registers will be written,
2790 * and pass on write indication (used for PIO/DMA
2793 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2795 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2796 tf->flags |= ATA_TFLAG_WRITE;
2799 * Set transfer length.
2801 * TODO: find out if we need to do more here to
2802 * cover scatter/gather case.
2804 qc->nbytes = scsi_bufflen(scmd);
2806 /* request result TF and be quiet about device error */
2807 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2812 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
2813 /* "Invalid field in cdb" */
2818 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2820 * @cmd: SCSI command opcode to consider
2822 * Look up the SCSI command given, and determine whether the
2823 * SCSI command is to be translated or simulated.
2826 * Pointer to translation function if possible, %NULL if not.
2829 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2839 return ata_scsi_rw_xlat;
2841 case SYNCHRONIZE_CACHE:
2842 if (ata_try_flush_cache(dev))
2843 return ata_scsi_flush_xlat;
2848 return ata_scsi_verify_xlat;
2852 return ata_scsi_pass_thru;
2855 return ata_scsi_start_stop_xlat;
2862 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2863 * @ap: ATA port to which the command was being sent
2864 * @cmd: SCSI command to dump
2866 * Prints the contents of a SCSI command via printk().
2869 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2870 struct scsi_cmnd *cmd)
2873 struct scsi_device *scsidev = cmd->device;
2874 u8 *scsicmd = cmd->cmnd;
2876 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2878 scsidev->channel, scsidev->id, scsidev->lun,
2879 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2880 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2885 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2886 void (*done)(struct scsi_cmnd *),
2887 struct ata_device *dev)
2889 u8 scsi_op = scmd->cmnd[0];
2890 ata_xlat_func_t xlat_func;
2893 if (dev->class == ATA_DEV_ATA) {
2894 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2897 xlat_func = ata_get_xlat_func(dev, scsi_op);
2899 if (unlikely(!scmd->cmd_len))
2903 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2904 /* relay SCSI command to ATAPI device */
2905 int len = COMMAND_SIZE(scsi_op);
2906 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
2909 xlat_func = atapi_xlat;
2911 /* ATA_16 passthru, treat as an ATA command */
2912 if (unlikely(scmd->cmd_len > 16))
2915 xlat_func = ata_get_xlat_func(dev, scsi_op);
2920 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
2922 ata_scsi_simulate(dev, scmd, done);
2927 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
2928 scmd->cmd_len, scsi_op, dev->cdb_len);
2929 scmd->result = DID_ERROR << 16;
2935 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2936 * @cmd: SCSI command to be sent
2937 * @done: Completion function, called when command is complete
2939 * In some cases, this function translates SCSI commands into
2940 * ATA taskfiles, and queues the taskfiles to be sent to
2941 * hardware. In other cases, this function simulates a
2942 * SCSI device by evaluating and responding to certain
2943 * SCSI commands. This creates the overall effect of
2944 * ATA and ATAPI devices appearing as SCSI devices.
2947 * Releases scsi-layer-held lock, and obtains host lock.
2950 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2953 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2955 struct ata_port *ap;
2956 struct ata_device *dev;
2957 struct scsi_device *scsidev = cmd->device;
2958 struct Scsi_Host *shost = scsidev->host;
2961 ap = ata_shost_to_port(shost);
2963 spin_unlock(shost->host_lock);
2964 spin_lock(ap->lock);
2966 ata_scsi_dump_cdb(ap, cmd);
2968 dev = ata_scsi_find_dev(ap, scsidev);
2970 rc = __ata_scsi_queuecmd(cmd, done, dev);
2972 cmd->result = (DID_BAD_TARGET << 16);
2976 spin_unlock(ap->lock);
2977 spin_lock(shost->host_lock);
2982 * ata_scsi_simulate - simulate SCSI command on ATA device
2983 * @dev: the target device
2984 * @cmd: SCSI command being sent to device.
2985 * @done: SCSI command completion function.
2987 * Interprets and directly executes a select list of SCSI commands
2988 * that can be handled internally.
2991 * spin_lock_irqsave(host lock)
2994 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
2995 void (*done)(struct scsi_cmnd *))
2997 struct ata_scsi_args args;
2998 const u8 *scsicmd = cmd->cmnd;
3006 switch(scsicmd[0]) {
3007 /* TODO: worth improving? */
3009 ata_scsi_invalid_field(cmd, done);
3013 if (scsicmd[1] & 2) /* is CmdDt set? */
3014 ata_scsi_invalid_field(cmd, done);
3015 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3016 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3017 else switch (scsicmd[2]) {
3019 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
3022 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
3025 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
3028 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3031 ata_scsi_invalid_field(cmd, done);
3038 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3041 case MODE_SELECT: /* unconditionally return */
3042 case MODE_SELECT_10: /* bad-field-in-cdb */
3043 ata_scsi_invalid_field(cmd, done);
3047 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3050 case SERVICE_ACTION_IN:
3051 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3052 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3054 ata_scsi_invalid_field(cmd, done);
3058 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3062 ata_scsi_set_sense(cmd, 0, 0, 0);
3063 cmd->result = (DRIVER_SENSE << 24);
3067 /* if we reach this, then writeback caching is disabled,
3068 * turning this into a no-op.
3070 case SYNCHRONIZE_CACHE:
3073 /* no-op's, complete with success */
3077 case TEST_UNIT_READY:
3078 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3081 case SEND_DIAGNOSTIC:
3082 tmp8 = scsicmd[1] & ~(1 << 3);
3083 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3084 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3086 ata_scsi_invalid_field(cmd, done);
3089 /* all other commands */
3091 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3092 /* "Invalid command operation code" */
3098 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3102 for (i = 0; i < host->n_ports; i++) {
3103 struct ata_port *ap = host->ports[i];
3104 struct Scsi_Host *shost;
3107 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3111 *(struct ata_port **)&shost->hostdata[0] = ap;
3112 ap->scsi_host = shost;
3114 shost->transportt = &ata_scsi_transport_template;
3115 shost->unique_id = ap->print_id;
3118 shost->max_channel = 1;
3119 shost->max_cmd_len = 16;
3121 /* Schedule policy is determined by ->qc_defer()
3122 * callback and it needs to see every deferred qc.
3123 * Set host_blocked to 1 to prevent SCSI midlayer from
3124 * automatically deferring requests.
3126 shost->max_host_blocked = 1;
3128 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3136 scsi_host_put(host->ports[i]->scsi_host);
3139 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3141 scsi_remove_host(shost);
3142 scsi_host_put(shost);
3147 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3150 struct ata_device *last_failed_dev = NULL;
3151 struct ata_link *link;
3152 struct ata_device *dev;
3154 if (ap->flags & ATA_FLAG_DISABLED)
3158 ata_port_for_each_link(link, ap) {
3159 ata_link_for_each_dev(dev, link) {
3160 struct scsi_device *sdev;
3161 int channel = 0, id = 0;
3163 if (!ata_dev_enabled(dev) || dev->sdev)
3166 if (ata_is_host_link(link))
3169 channel = link->pmp;
3171 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3173 if (!IS_ERR(sdev)) {
3175 scsi_device_put(sdev);
3180 /* If we scanned while EH was in progress or allocation
3181 * failure occurred, scan would have failed silently. Check
3182 * whether all devices are attached.
3184 ata_port_for_each_link(link, ap) {
3185 ata_link_for_each_dev(dev, link) {
3186 if (ata_dev_enabled(dev) && !dev->sdev)
3194 /* we're missing some SCSI devices */
3196 /* If caller requested synchrnous scan && we've made
3197 * any progress, sleep briefly and repeat.
3199 if (dev != last_failed_dev) {
3201 last_failed_dev = dev;
3205 /* We might be failing to detect boot device, give it
3206 * a few more chances.
3213 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3214 "failed without making any progress,\n"
3215 " switching to async\n");
3218 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3219 round_jiffies_relative(HZ));
3223 * ata_scsi_offline_dev - offline attached SCSI device
3224 * @dev: ATA device to offline attached SCSI device for
3226 * This function is called from ata_eh_hotplug() and responsible
3227 * for taking the SCSI device attached to @dev offline. This
3228 * function is called with host lock which protects dev->sdev
3232 * spin_lock_irqsave(host lock)
3235 * 1 if attached SCSI device exists, 0 otherwise.
3237 int ata_scsi_offline_dev(struct ata_device *dev)
3240 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3247 * ata_scsi_remove_dev - remove attached SCSI device
3248 * @dev: ATA device to remove attached SCSI device for
3250 * This function is called from ata_eh_scsi_hotplug() and
3251 * responsible for removing the SCSI device attached to @dev.
3254 * Kernel thread context (may sleep).
3256 static void ata_scsi_remove_dev(struct ata_device *dev)
3258 struct ata_port *ap = dev->link->ap;
3259 struct scsi_device *sdev;
3260 unsigned long flags;
3262 /* Alas, we need to grab scan_mutex to ensure SCSI device
3263 * state doesn't change underneath us and thus
3264 * scsi_device_get() always succeeds. The mutex locking can
3265 * be removed if there is __scsi_device_get() interface which
3266 * increments reference counts regardless of device state.
3268 mutex_lock(&ap->scsi_host->scan_mutex);
3269 spin_lock_irqsave(ap->lock, flags);
3271 /* clearing dev->sdev is protected by host lock */
3276 /* If user initiated unplug races with us, sdev can go
3277 * away underneath us after the host lock and
3278 * scan_mutex are released. Hold onto it.
3280 if (scsi_device_get(sdev) == 0) {
3281 /* The following ensures the attached sdev is
3282 * offline on return from ata_scsi_offline_dev()
3283 * regardless it wins or loses the race
3284 * against this function.
3286 scsi_device_set_state(sdev, SDEV_OFFLINE);
3293 spin_unlock_irqrestore(ap->lock, flags);
3294 mutex_unlock(&ap->scsi_host->scan_mutex);
3297 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3298 sdev->sdev_gendev.bus_id);
3300 scsi_remove_device(sdev);
3301 scsi_device_put(sdev);
3305 static void ata_scsi_handle_link_detach(struct ata_link *link)
3307 struct ata_port *ap = link->ap;
3308 struct ata_device *dev;
3310 ata_link_for_each_dev(dev, link) {
3311 unsigned long flags;
3313 if (!(dev->flags & ATA_DFLAG_DETACHED))
3316 spin_lock_irqsave(ap->lock, flags);
3317 dev->flags &= ~ATA_DFLAG_DETACHED;
3318 spin_unlock_irqrestore(ap->lock, flags);
3320 ata_scsi_remove_dev(dev);
3325 * ata_scsi_media_change_notify - send media change event
3326 * @dev: Pointer to the disk device with media change event
3328 * Tell the block layer to send a media change notification
3332 * spin_lock_irqsave(host lock)
3334 void ata_scsi_media_change_notify(struct ata_device *dev)
3337 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3342 * ata_scsi_hotplug - SCSI part of hotplug
3343 * @work: Pointer to ATA port to perform SCSI hotplug on
3345 * Perform SCSI part of hotplug. It's executed from a separate
3346 * workqueue after EH completes. This is necessary because SCSI
3347 * hot plugging requires working EH and hot unplugging is
3348 * synchronized with hot plugging with a mutex.
3351 * Kernel thread context (may sleep).
3353 void ata_scsi_hotplug(struct work_struct *work)
3355 struct ata_port *ap =
3356 container_of(work, struct ata_port, hotplug_task.work);
3359 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3360 DPRINTK("ENTER/EXIT - unloading\n");
3366 /* Unplug detached devices. We cannot use link iterator here
3367 * because PMP links have to be scanned even if PMP is
3368 * currently not attached. Iterate manually.
3370 ata_scsi_handle_link_detach(&ap->link);
3372 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3373 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3375 /* scan for new ones */
3376 ata_scsi_scan_host(ap, 0);
3382 * ata_scsi_user_scan - indication for user-initiated bus scan
3383 * @shost: SCSI host to scan
3384 * @channel: Channel to scan
3388 * This function is called when user explicitly requests bus
3389 * scan. Set probe pending flag and invoke EH.
3392 * SCSI layer (we don't care)
3397 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3398 unsigned int id, unsigned int lun)
3400 struct ata_port *ap = ata_shost_to_port(shost);
3401 unsigned long flags;
3404 if (!ap->ops->error_handler)
3407 if (lun != SCAN_WILD_CARD && lun)
3410 if (ap->nr_pmp_links == 0) {
3411 if (channel != SCAN_WILD_CARD && channel)
3415 if (id != SCAN_WILD_CARD && id)
3420 spin_lock_irqsave(ap->lock, flags);
3422 if (devno == SCAN_WILD_CARD) {
3423 struct ata_link *link;
3425 ata_port_for_each_link(link, ap) {
3426 struct ata_eh_info *ehi = &link->eh_info;
3427 ehi->probe_mask |= (1 << ata_link_max_devices(link)) - 1;
3428 ehi->action |= ATA_EH_SOFTRESET;
3431 struct ata_device *dev = ata_find_dev(ap, devno);
3434 struct ata_eh_info *ehi = &dev->link->eh_info;
3435 ehi->probe_mask |= 1 << dev->devno;
3436 ehi->action |= ATA_EH_SOFTRESET;
3437 ehi->flags |= ATA_EHI_RESUME_LINK;
3443 ata_port_schedule_eh(ap);
3444 spin_unlock_irqrestore(ap->lock, flags);
3445 ata_port_wait_eh(ap);
3447 spin_unlock_irqrestore(ap->lock, flags);
3453 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3454 * @work: Pointer to ATA port to perform scsi_rescan_device()
3456 * After ATA pass thru (SAT) commands are executed successfully,
3457 * libata need to propagate the changes to SCSI layer. This
3458 * function must be executed from ata_aux_wq such that sdev
3459 * attach/detach don't race with rescan.
3462 * Kernel thread context (may sleep).
3464 void ata_scsi_dev_rescan(struct work_struct *work)
3466 struct ata_port *ap =
3467 container_of(work, struct ata_port, scsi_rescan_task);
3468 struct ata_link *link;
3469 struct ata_device *dev;
3470 unsigned long flags;
3472 spin_lock_irqsave(ap->lock, flags);
3474 ata_port_for_each_link(link, ap) {
3475 ata_link_for_each_dev(dev, link) {
3476 struct scsi_device *sdev = dev->sdev;
3478 if (!ata_dev_enabled(dev) || !sdev)
3480 if (scsi_device_get(sdev))
3483 spin_unlock_irqrestore(ap->lock, flags);
3484 scsi_rescan_device(&(sdev->sdev_gendev));
3485 scsi_device_put(sdev);
3486 spin_lock_irqsave(ap->lock, flags);
3490 spin_unlock_irqrestore(ap->lock, flags);
3494 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3495 * @host: ATA host container for all SAS ports
3496 * @port_info: Information from low-level host driver
3497 * @shost: SCSI host that the scsi device is attached to
3500 * PCI/etc. bus probe sem.
3503 * ata_port pointer on success / NULL on failure.
3506 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3507 struct ata_port_info *port_info,
3508 struct Scsi_Host *shost)
3510 struct ata_port *ap;
3512 ap = ata_port_alloc(host);
3517 ap->lock = shost->host_lock;
3518 ap->pio_mask = port_info->pio_mask;
3519 ap->mwdma_mask = port_info->mwdma_mask;
3520 ap->udma_mask = port_info->udma_mask;
3521 ap->flags |= port_info->flags;
3522 ap->ops = port_info->port_ops;
3523 ap->cbl = ATA_CBL_SATA;
3527 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3530 * ata_sas_port_start - Set port up for dma.
3531 * @ap: Port to initialize
3533 * Called just after data structures for each port are
3534 * initialized. Allocates DMA pad.
3536 * May be used as the port_start() entry in ata_port_operations.
3539 * Inherited from caller.
3541 int ata_sas_port_start(struct ata_port *ap)
3543 return ata_pad_alloc(ap, ap->dev);
3545 EXPORT_SYMBOL_GPL(ata_sas_port_start);
3548 * ata_port_stop - Undo ata_sas_port_start()
3549 * @ap: Port to shut down
3551 * Frees the DMA pad.
3553 * May be used as the port_stop() entry in ata_port_operations.
3556 * Inherited from caller.
3559 void ata_sas_port_stop(struct ata_port *ap)
3561 ata_pad_free(ap, ap->dev);
3563 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3566 * ata_sas_port_init - Initialize a SATA device
3567 * @ap: SATA port to initialize
3570 * PCI/etc. bus probe sem.
3573 * Zero on success, non-zero on error.
3576 int ata_sas_port_init(struct ata_port *ap)
3578 int rc = ap->ops->port_start(ap);
3581 ap->print_id = ata_print_id++;
3582 rc = ata_bus_probe(ap);
3587 EXPORT_SYMBOL_GPL(ata_sas_port_init);
3590 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3591 * @ap: SATA port to destroy
3595 void ata_sas_port_destroy(struct ata_port *ap)
3597 if (ap->ops->port_stop)
3598 ap->ops->port_stop(ap);
3601 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3604 * ata_sas_slave_configure - Default slave_config routine for libata devices
3605 * @sdev: SCSI device to configure
3606 * @ap: ATA port to which SCSI device is attached
3612 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3614 ata_scsi_sdev_config(sdev);
3615 ata_scsi_dev_config(sdev, ap->link.device);
3618 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3621 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3622 * @cmd: SCSI command to be sent
3623 * @done: Completion function, called when command is complete
3624 * @ap: ATA port to which the command is being sent
3627 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3631 int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3632 struct ata_port *ap)
3636 ata_scsi_dump_cdb(ap, cmd);
3638 if (likely(ata_scsi_dev_enabled(ap->link.device)))
3639 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
3641 cmd->result = (DID_BAD_TARGET << 16);
3646 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);