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;
829 static void ata_scsi_dev_config(struct scsi_device *sdev,
830 struct ata_device *dev)
832 /* configure max sectors */
833 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
835 if (dev->class == ATA_DEV_ATAPI)
836 /* set the min alignment */
837 blk_queue_update_dma_alignment(sdev->request_queue,
840 /* ATA devices must be sector aligned */
841 blk_queue_update_dma_alignment(sdev->request_queue,
843 sdev->manage_start_stop = 1;
846 if (dev->flags & ATA_DFLAG_AN)
847 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
849 if (dev->flags & ATA_DFLAG_NCQ) {
852 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
853 depth = min(ATA_MAX_QUEUE - 1, depth);
854 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
859 * ata_scsi_slave_config - Set SCSI device attributes
860 * @sdev: SCSI device to examine
862 * This is called before we actually start reading
863 * and writing to the device, to configure certain
864 * SCSI mid-layer behaviors.
867 * Defined by SCSI layer. We don't really care.
870 int ata_scsi_slave_config(struct scsi_device *sdev)
872 struct ata_port *ap = ata_shost_to_port(sdev->host);
873 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
875 ata_scsi_sdev_config(sdev);
878 ata_scsi_dev_config(sdev, dev);
884 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
885 * @sdev: SCSI device to be destroyed
887 * @sdev is about to be destroyed for hot/warm unplugging. If
888 * this unplugging was initiated by libata as indicated by NULL
889 * dev->sdev, this function doesn't have to do anything.
890 * Otherwise, SCSI layer initiated warm-unplug is in progress.
891 * Clear dev->sdev, schedule the device for ATA detach and invoke
895 * Defined by SCSI layer. We don't really care.
897 void ata_scsi_slave_destroy(struct scsi_device *sdev)
899 struct ata_port *ap = ata_shost_to_port(sdev->host);
901 struct ata_device *dev;
903 if (!ap->ops->error_handler)
906 spin_lock_irqsave(ap->lock, flags);
907 dev = __ata_scsi_find_dev(ap, sdev);
908 if (dev && dev->sdev) {
909 /* SCSI device already in CANCEL state, no need to offline it */
911 dev->flags |= ATA_DFLAG_DETACH;
912 ata_port_schedule_eh(ap);
914 spin_unlock_irqrestore(ap->lock, flags);
918 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
919 * @sdev: SCSI device to configure queue depth for
920 * @queue_depth: new queue depth
922 * This is libata standard hostt->change_queue_depth callback.
923 * SCSI will call into this callback when user tries to set queue
927 * SCSI layer (we don't care)
930 * Newly configured queue depth.
932 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
934 struct ata_port *ap = ata_shost_to_port(sdev->host);
935 struct ata_device *dev;
938 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
939 return sdev->queue_depth;
941 dev = ata_scsi_find_dev(ap, sdev);
942 if (!dev || !ata_dev_enabled(dev))
943 return sdev->queue_depth;
946 spin_lock_irqsave(ap->lock, flags);
947 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
948 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
949 dev->flags |= ATA_DFLAG_NCQ_OFF;
952 spin_unlock_irqrestore(ap->lock, flags);
954 /* limit and apply queue depth */
955 queue_depth = min(queue_depth, sdev->host->can_queue);
956 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
957 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
959 if (sdev->queue_depth == queue_depth)
962 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
966 /* XXX: for spindown warning */
967 static void ata_delayed_done_timerfn(unsigned long arg)
969 struct scsi_cmnd *scmd = (void *)arg;
971 scmd->scsi_done(scmd);
974 /* XXX: for spindown warning */
975 static void ata_delayed_done(struct scsi_cmnd *scmd)
977 static struct timer_list timer;
979 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
980 mod_timer(&timer, jiffies + 5 * HZ);
984 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
985 * @qc: Storage for translated ATA taskfile
987 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
988 * (to start). Perhaps these commands should be preceded by
989 * CHECK POWER MODE to see what power mode the device is already in.
990 * [See SAT revision 5 at www.t10.org]
993 * spin_lock_irqsave(host lock)
996 * Zero on success, non-zero on error.
998 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1000 struct scsi_cmnd *scmd = qc->scsicmd;
1001 struct ata_taskfile *tf = &qc->tf;
1002 const u8 *cdb = scmd->cmnd;
1004 if (scmd->cmd_len < 5)
1007 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1008 tf->protocol = ATA_PROT_NODATA;
1010 ; /* ignore IMMED bit, violates sat-r05 */
1013 goto invalid_fld; /* LOEJ bit set not supported */
1014 if (((cdb[4] >> 4) & 0xf) != 0)
1015 goto invalid_fld; /* power conditions not supported */
1017 if (qc->dev->horkage & ATA_HORKAGE_SKIP_PM) {
1018 /* the device lacks PM support, finish without doing anything */
1019 scmd->result = SAM_STAT_GOOD;
1024 tf->nsect = 1; /* 1 sector, lba=0 */
1026 if (qc->dev->flags & ATA_DFLAG_LBA) {
1027 tf->flags |= ATA_TFLAG_LBA;
1032 tf->device |= ATA_LBA;
1035 tf->lbal = 0x1; /* sect */
1036 tf->lbam = 0x0; /* cyl low */
1037 tf->lbah = 0x0; /* cyl high */
1040 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1042 /* XXX: This is for backward compatibility, will be
1043 * removed. Read Documentation/feature-removal-schedule.txt
1046 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
1047 (system_state == SYSTEM_HALT ||
1048 system_state == SYSTEM_POWER_OFF)) {
1049 static unsigned long warned;
1051 if (!test_and_set_bit(0, &warned)) {
1052 ata_dev_printk(qc->dev, KERN_WARNING,
1053 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
1054 "UPDATE SHUTDOWN UTILITY\n");
1055 ata_dev_printk(qc->dev, KERN_WARNING,
1056 "For more info, visit "
1057 "http://linux-ata.org/shutdown.html\n");
1059 /* ->scsi_done is not used, use it for
1060 * delayed completion.
1062 scmd->scsi_done = qc->scsidone;
1063 qc->scsidone = ata_delayed_done;
1065 scmd->result = SAM_STAT_GOOD;
1069 /* Issue ATA STANDBY IMMEDIATE command */
1070 tf->command = ATA_CMD_STANDBYNOW1;
1074 * Standby and Idle condition timers could be implemented but that
1075 * would require libata to implement the Power condition mode page
1076 * and allow the user to change it. Changing mode pages requires
1077 * MODE SELECT to be implemented.
1083 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1084 /* "Invalid field in cbd" */
1090 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1091 * @qc: Storage for translated ATA taskfile
1093 * Sets up an ATA taskfile to issue FLUSH CACHE or
1097 * spin_lock_irqsave(host lock)
1100 * Zero on success, non-zero on error.
1102 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1104 struct ata_taskfile *tf = &qc->tf;
1106 tf->flags |= ATA_TFLAG_DEVICE;
1107 tf->protocol = ATA_PROT_NODATA;
1109 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1110 tf->command = ATA_CMD_FLUSH_EXT;
1112 tf->command = ATA_CMD_FLUSH;
1114 /* flush is critical for IO integrity, consider it an IO command */
1115 qc->flags |= ATA_QCFLAG_IO;
1121 * scsi_6_lba_len - Get LBA and transfer length
1122 * @cdb: SCSI command to translate
1124 * Calculate LBA and transfer length for 6-byte commands.
1128 * @plen: the transfer length
1130 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1135 VPRINTK("six-byte command\n");
1137 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1138 lba |= ((u64)cdb[2]) << 8;
1139 lba |= ((u64)cdb[3]);
1148 * scsi_10_lba_len - Get LBA and transfer length
1149 * @cdb: SCSI command to translate
1151 * Calculate LBA and transfer length for 10-byte commands.
1155 * @plen: the transfer length
1157 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1162 VPRINTK("ten-byte command\n");
1164 lba |= ((u64)cdb[2]) << 24;
1165 lba |= ((u64)cdb[3]) << 16;
1166 lba |= ((u64)cdb[4]) << 8;
1167 lba |= ((u64)cdb[5]);
1169 len |= ((u32)cdb[7]) << 8;
1170 len |= ((u32)cdb[8]);
1177 * scsi_16_lba_len - Get LBA and transfer length
1178 * @cdb: SCSI command to translate
1180 * Calculate LBA and transfer length for 16-byte commands.
1184 * @plen: the transfer length
1186 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1191 VPRINTK("sixteen-byte command\n");
1193 lba |= ((u64)cdb[2]) << 56;
1194 lba |= ((u64)cdb[3]) << 48;
1195 lba |= ((u64)cdb[4]) << 40;
1196 lba |= ((u64)cdb[5]) << 32;
1197 lba |= ((u64)cdb[6]) << 24;
1198 lba |= ((u64)cdb[7]) << 16;
1199 lba |= ((u64)cdb[8]) << 8;
1200 lba |= ((u64)cdb[9]);
1202 len |= ((u32)cdb[10]) << 24;
1203 len |= ((u32)cdb[11]) << 16;
1204 len |= ((u32)cdb[12]) << 8;
1205 len |= ((u32)cdb[13]);
1212 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1213 * @qc: Storage for translated ATA taskfile
1215 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1218 * spin_lock_irqsave(host lock)
1221 * Zero on success, non-zero on error.
1223 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1225 struct scsi_cmnd *scmd = qc->scsicmd;
1226 struct ata_taskfile *tf = &qc->tf;
1227 struct ata_device *dev = qc->dev;
1228 u64 dev_sectors = qc->dev->n_sectors;
1229 const u8 *cdb = scmd->cmnd;
1233 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1234 tf->protocol = ATA_PROT_NODATA;
1236 if (cdb[0] == VERIFY) {
1237 if (scmd->cmd_len < 10)
1239 scsi_10_lba_len(cdb, &block, &n_block);
1240 } else if (cdb[0] == VERIFY_16) {
1241 if (scmd->cmd_len < 16)
1243 scsi_16_lba_len(cdb, &block, &n_block);
1249 if (block >= dev_sectors)
1251 if ((block + n_block) > dev_sectors)
1254 if (dev->flags & ATA_DFLAG_LBA) {
1255 tf->flags |= ATA_TFLAG_LBA;
1257 if (lba_28_ok(block, n_block)) {
1259 tf->command = ATA_CMD_VERIFY;
1260 tf->device |= (block >> 24) & 0xf;
1261 } else if (lba_48_ok(block, n_block)) {
1262 if (!(dev->flags & ATA_DFLAG_LBA48))
1266 tf->flags |= ATA_TFLAG_LBA48;
1267 tf->command = ATA_CMD_VERIFY_EXT;
1269 tf->hob_nsect = (n_block >> 8) & 0xff;
1271 tf->hob_lbah = (block >> 40) & 0xff;
1272 tf->hob_lbam = (block >> 32) & 0xff;
1273 tf->hob_lbal = (block >> 24) & 0xff;
1275 /* request too large even for LBA48 */
1278 tf->nsect = n_block & 0xff;
1280 tf->lbah = (block >> 16) & 0xff;
1281 tf->lbam = (block >> 8) & 0xff;
1282 tf->lbal = block & 0xff;
1284 tf->device |= ATA_LBA;
1287 u32 sect, head, cyl, track;
1289 if (!lba_28_ok(block, n_block))
1292 /* Convert LBA to CHS */
1293 track = (u32)block / dev->sectors;
1294 cyl = track / dev->heads;
1295 head = track % dev->heads;
1296 sect = (u32)block % dev->sectors + 1;
1298 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1299 (u32)block, track, cyl, head, sect);
1301 /* Check whether the converted CHS can fit.
1305 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1308 tf->command = ATA_CMD_VERIFY;
1309 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1312 tf->lbah = cyl >> 8;
1319 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1320 /* "Invalid field in cbd" */
1324 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1325 /* "Logical Block Address out of range" */
1329 scmd->result = SAM_STAT_GOOD;
1334 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1335 * @qc: Storage for translated ATA taskfile
1337 * Converts any of six SCSI read/write commands into the
1338 * ATA counterpart, including starting sector (LBA),
1339 * sector count, and taking into account the device's LBA48
1342 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1343 * %WRITE_16 are currently supported.
1346 * spin_lock_irqsave(host lock)
1349 * Zero on success, non-zero on error.
1351 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1353 struct scsi_cmnd *scmd = qc->scsicmd;
1354 const u8 *cdb = scmd->cmnd;
1355 unsigned int tf_flags = 0;
1360 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1361 tf_flags |= ATA_TFLAG_WRITE;
1363 /* Calculate the SCSI LBA, transfer length and FUA. */
1367 if (unlikely(scmd->cmd_len < 10))
1369 scsi_10_lba_len(cdb, &block, &n_block);
1370 if (unlikely(cdb[1] & (1 << 3)))
1371 tf_flags |= ATA_TFLAG_FUA;
1375 if (unlikely(scmd->cmd_len < 6))
1377 scsi_6_lba_len(cdb, &block, &n_block);
1379 /* for 6-byte r/w commands, transfer length 0
1380 * means 256 blocks of data, not 0 block.
1387 if (unlikely(scmd->cmd_len < 16))
1389 scsi_16_lba_len(cdb, &block, &n_block);
1390 if (unlikely(cdb[1] & (1 << 3)))
1391 tf_flags |= ATA_TFLAG_FUA;
1394 DPRINTK("no-byte command\n");
1398 /* Check and compose ATA command */
1400 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1401 * length 0 means transfer 0 block of data.
1402 * However, for ATA R/W commands, sector count 0 means
1403 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1405 * WARNING: one or two older ATA drives treat 0 as 0...
1409 qc->flags |= ATA_QCFLAG_IO;
1410 qc->nbytes = n_block * ATA_SECT_SIZE;
1412 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1414 if (likely(rc == 0))
1419 /* treat all other errors as -EINVAL, fall through */
1421 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1422 /* "Invalid field in cbd" */
1426 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1427 /* "Logical Block Address out of range" */
1431 scmd->result = SAM_STAT_GOOD;
1435 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1437 struct ata_port *ap = qc->ap;
1438 struct scsi_cmnd *cmd = qc->scsicmd;
1439 u8 *cdb = cmd->cmnd;
1440 int need_sense = (qc->err_mask != 0);
1442 /* For ATA pass thru (SAT) commands, generate a sense block if
1443 * user mandated it or if there's an error. Note that if we
1444 * generate because the user forced us to, a check condition
1445 * is generated and the ATA register values are returned
1446 * whether the command completed successfully or not. If there
1447 * was no error, SK, ASC and ASCQ will all be zero.
1449 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1450 ((cdb[2] & 0x20) || need_sense)) {
1451 ata_gen_passthru_sense(qc);
1454 cmd->result = SAM_STAT_GOOD;
1456 /* TODO: decide which descriptor format to use
1457 * for 48b LBA devices and call that here
1458 * instead of the fixed desc, which is only
1459 * good for smaller LBA (and maybe CHS?)
1462 ata_gen_ata_sense(qc);
1466 /* XXX: track spindown state for spindown skipping and warning */
1467 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1468 qc->tf.command == ATA_CMD_STANDBYNOW1))
1469 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1470 else if (likely(system_state != SYSTEM_HALT &&
1471 system_state != SYSTEM_POWER_OFF))
1472 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1474 if (need_sense && !ap->ops->error_handler)
1475 ata_dump_status(ap->print_id, &qc->result_tf);
1483 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1484 * @dev: ATA device to which the command is addressed
1485 * @cmd: SCSI command to execute
1486 * @done: SCSI command completion function
1487 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1489 * Our ->queuecommand() function has decided that the SCSI
1490 * command issued can be directly translated into an ATA
1491 * command, rather than handled internally.
1493 * This function sets up an ata_queued_cmd structure for the
1494 * SCSI command, and sends that ata_queued_cmd to the hardware.
1496 * The xlat_func argument (actor) returns 0 if ready to execute
1497 * ATA command, else 1 to finish translation. If 1 is returned
1498 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1499 * to be set reflecting an error condition or clean (early)
1503 * spin_lock_irqsave(host lock)
1506 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1507 * needs to be deferred.
1509 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1510 void (*done)(struct scsi_cmnd *),
1511 ata_xlat_func_t xlat_func)
1513 struct ata_port *ap = dev->link->ap;
1514 struct ata_queued_cmd *qc;
1519 qc = ata_scsi_qc_new(dev, cmd, done);
1523 /* data is present; dma-map it */
1524 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1525 cmd->sc_data_direction == DMA_TO_DEVICE) {
1526 if (unlikely(scsi_bufflen(cmd) < 1)) {
1527 ata_dev_printk(dev, KERN_WARNING,
1528 "WARNING: zero len r/w req\n");
1532 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1534 qc->dma_dir = cmd->sc_data_direction;
1537 qc->complete_fn = ata_scsi_qc_complete;
1542 if (ap->ops->qc_defer) {
1543 if ((rc = ap->ops->qc_defer(qc)))
1547 /* select device, send command to hardware */
1556 DPRINTK("EXIT - early finish (good or error)\n");
1561 cmd->result = (DID_ERROR << 16);
1564 DPRINTK("EXIT - internal\n");
1569 DPRINTK("EXIT - defer\n");
1570 if (rc == ATA_DEFER_LINK)
1571 return SCSI_MLQUEUE_DEVICE_BUSY;
1573 return SCSI_MLQUEUE_HOST_BUSY;
1577 * ata_scsi_rbuf_get - Map response buffer.
1578 * @cmd: SCSI command containing buffer to be mapped.
1579 * @buf_out: Pointer to mapped area.
1581 * Maps buffer contained within SCSI command @cmd.
1584 * spin_lock_irqsave(host lock)
1587 * Length of response buffer.
1590 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1593 unsigned int buflen;
1595 struct scatterlist *sg = scsi_sglist(cmd);
1598 buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
1599 buflen = sg->length;
1610 * ata_scsi_rbuf_put - Unmap response buffer.
1611 * @cmd: SCSI command containing buffer to be unmapped.
1612 * @buf: buffer to unmap
1614 * Unmaps response buffer contained within @cmd.
1617 * spin_lock_irqsave(host lock)
1620 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1622 struct scatterlist *sg = scsi_sglist(cmd);
1624 kunmap_atomic(buf - sg->offset, KM_IRQ0);
1628 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1629 * @args: device IDENTIFY data / SCSI command of interest.
1630 * @actor: Callback hook for desired SCSI command simulator
1632 * Takes care of the hard work of simulating a SCSI command...
1633 * Mapping the response buffer, calling the command's handler,
1634 * and handling the handler's return value. This return value
1635 * indicates whether the handler wishes the SCSI command to be
1636 * completed successfully (0), or not (in which case cmd->result
1637 * and sense buffer are assumed to be set).
1640 * spin_lock_irqsave(host lock)
1643 void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1644 unsigned int (*actor) (struct ata_scsi_args *args,
1645 u8 *rbuf, unsigned int buflen))
1648 unsigned int buflen, rc;
1649 struct scsi_cmnd *cmd = args->cmd;
1651 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1652 memset(rbuf, 0, buflen);
1653 rc = actor(args, rbuf, buflen);
1654 ata_scsi_rbuf_put(cmd, rbuf);
1657 cmd->result = SAM_STAT_GOOD;
1662 * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer
1663 * @idx: byte index into SCSI response buffer
1664 * @val: value to set
1666 * To be used by SCSI command simulator functions. This macros
1667 * expects two local variables, u8 *rbuf and unsigned int buflen,
1673 #define ATA_SCSI_RBUF_SET(idx, val) do { \
1674 if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \
1678 * ata_scsiop_inq_std - Simulate INQUIRY command
1679 * @args: device IDENTIFY data / SCSI command of interest.
1680 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1681 * @buflen: Response buffer length.
1683 * Returns standard device identification data associated
1684 * with non-VPD INQUIRY command output.
1687 * spin_lock_irqsave(host lock)
1690 unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1691 unsigned int buflen)
1696 0x5, /* claim SPC-3 version compatibility */
1701 /* set scsi removeable (RMB) bit per ata bit */
1702 if (ata_id_removeable(args->id))
1707 memcpy(rbuf, hdr, sizeof(hdr));
1710 memcpy(&rbuf[8], "ATA ", 8);
1711 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1712 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1713 if (rbuf[32] == 0 || rbuf[32] == ' ')
1714 memcpy(&rbuf[32], "n/a ", 4);
1718 const u8 versions[] = {
1719 0x60, /* SAM-3 (no version claimed) */
1722 0x20, /* SBC-2 (no version claimed) */
1725 0x60 /* SPC-3 (no version claimed) */
1728 memcpy(rbuf + 59, versions, sizeof(versions));
1735 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1736 * @args: device IDENTIFY data / SCSI command of interest.
1737 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1738 * @buflen: Response buffer length.
1740 * Returns list of inquiry VPD pages available.
1743 * spin_lock_irqsave(host lock)
1746 unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1747 unsigned int buflen)
1749 const u8 pages[] = {
1750 0x00, /* page 0x00, this page */
1751 0x80, /* page 0x80, unit serial no page */
1752 0x83 /* page 0x83, device ident page */
1754 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1757 memcpy(rbuf + 4, pages, sizeof(pages));
1763 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1764 * @args: device IDENTIFY data / SCSI command of interest.
1765 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1766 * @buflen: Response buffer length.
1768 * Returns ATA device serial number.
1771 * spin_lock_irqsave(host lock)
1774 unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1775 unsigned int buflen)
1779 0x80, /* this page code */
1781 ATA_ID_SERNO_LEN, /* page len */
1783 memcpy(rbuf, hdr, sizeof(hdr));
1785 if (buflen > (ATA_ID_SERNO_LEN + 4 - 1))
1786 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1787 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1793 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1794 * @args: device IDENTIFY data / SCSI command of interest.
1795 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1796 * @buflen: Response buffer length.
1798 * Yields two logical unit device identification designators:
1799 * - vendor specific ASCII containing the ATA serial number
1800 * - SAT defined "t10 vendor id based" containing ASCII vendor
1801 * name ("ATA "), model and serial numbers.
1804 * spin_lock_irqsave(host lock)
1807 unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1808 unsigned int buflen)
1811 const int sat_model_serial_desc_len = 68;
1813 rbuf[1] = 0x83; /* this page code */
1816 if (buflen > (ATA_ID_SERNO_LEN + num + 3)) {
1817 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1819 rbuf[num + 3] = ATA_ID_SERNO_LEN;
1821 ata_id_string(args->id, (unsigned char *) rbuf + num,
1822 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1823 num += ATA_ID_SERNO_LEN;
1825 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1826 /* SAT defined lu model and serial numbers descriptor */
1827 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1830 rbuf[num + 3] = sat_model_serial_desc_len;
1832 memcpy(rbuf + num, "ATA ", 8);
1834 ata_id_string(args->id, (unsigned char *) rbuf + num,
1835 ATA_ID_PROD, ATA_ID_PROD_LEN);
1836 num += ATA_ID_PROD_LEN;
1837 ata_id_string(args->id, (unsigned char *) rbuf + num,
1838 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1839 num += ATA_ID_SERNO_LEN;
1841 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1846 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
1847 * @args: device IDENTIFY data / SCSI command of interest.
1848 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1849 * @buflen: Response buffer length.
1851 * Yields SAT-specified ATA VPD page.
1854 * spin_lock_irqsave(host lock)
1857 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf,
1858 unsigned int buflen)
1861 struct ata_taskfile tf;
1867 memset(&pbuf, 0, sizeof(pbuf));
1868 memset(&tf, 0, sizeof(tf));
1870 pbuf[1] = 0x89; /* our page code */
1871 pbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
1872 pbuf[3] = (0x238 & 0xff);
1874 memcpy(&pbuf[8], "linux ", 8);
1875 memcpy(&pbuf[16], "libata ", 16);
1876 memcpy(&pbuf[32], DRV_VERSION, 4);
1877 ata_id_string(args->id, &pbuf[32], ATA_ID_FW_REV, 4);
1879 /* we don't store the ATA device signature, so we fake it */
1881 tf.command = ATA_DRDY; /* really, this is Status reg */
1885 ata_tf_to_fis(&tf, 0, 1, &pbuf[36]); /* TODO: PMP? */
1886 pbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
1888 pbuf[56] = ATA_CMD_ID_ATA;
1890 i = min(buflen, 60U);
1891 memcpy(rbuf, &pbuf[0], i);
1897 memcpy(&rbuf[60], &args->id[0], min(buflen, 512U));
1902 * ata_scsiop_noop - Command handler that simply returns success.
1903 * @args: device IDENTIFY data / SCSI command of interest.
1904 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1905 * @buflen: Response buffer length.
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)
1914 unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1915 unsigned int buflen)
1922 * ata_msense_push - Push data onto MODE SENSE data output buffer
1923 * @ptr_io: (input/output) Location to store more output data
1924 * @last: End of output data buffer
1925 * @buf: Pointer to BLOB being added to output buffer
1926 * @buflen: Length of BLOB
1928 * Store MODE SENSE data on an output buffer.
1934 static void ata_msense_push(u8 **ptr_io, const u8 *last,
1935 const u8 *buf, unsigned int buflen)
1939 if ((ptr + buflen - 1) > last)
1942 memcpy(ptr, buf, buflen);
1950 * ata_msense_caching - Simulate MODE SENSE caching info page
1951 * @id: device IDENTIFY data
1952 * @ptr_io: (input/output) Location to store more output data
1953 * @last: End of output data buffer
1955 * Generate a caching info page, which conditionally indicates
1956 * write caching to the SCSI layer, depending on device
1963 static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1966 u8 page[CACHE_MPAGE_LEN];
1968 memcpy(page, def_cache_mpage, sizeof(page));
1969 if (ata_id_wcache_enabled(id))
1970 page[2] |= (1 << 2); /* write cache enable */
1971 if (!ata_id_rahead_enabled(id))
1972 page[12] |= (1 << 5); /* disable read ahead */
1974 ata_msense_push(ptr_io, last, page, sizeof(page));
1975 return sizeof(page);
1979 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1980 * @dev: Device associated with this MODE SENSE command
1981 * @ptr_io: (input/output) Location to store more output data
1982 * @last: End of output data buffer
1984 * Generate a generic MODE SENSE control mode page.
1990 static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1992 ata_msense_push(ptr_io, last, def_control_mpage,
1993 sizeof(def_control_mpage));
1994 return sizeof(def_control_mpage);
1998 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1999 * @dev: Device associated with this MODE SENSE command
2000 * @ptr_io: (input/output) Location to store more output data
2001 * @last: End of output data buffer
2003 * Generate a generic MODE SENSE r/w error recovery page.
2009 static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
2012 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
2013 sizeof(def_rw_recovery_mpage));
2014 return sizeof(def_rw_recovery_mpage);
2018 * We can turn this into a real blacklist if it's needed, for now just
2019 * blacklist any Maxtor BANC1G10 revision firmware
2021 static int ata_dev_supports_fua(u16 *id)
2023 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2027 if (!ata_id_has_fua(id))
2030 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2031 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2033 if (strcmp(model, "Maxtor"))
2035 if (strcmp(fw, "BANC1G10"))
2038 return 0; /* blacklisted */
2042 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2043 * @args: device IDENTIFY data / SCSI command of interest.
2044 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2045 * @buflen: Response buffer length.
2047 * Simulate MODE SENSE commands. Assume this is invoked for direct
2048 * access devices (e.g. disks) only. There should be no block
2049 * descriptor for other device types.
2052 * spin_lock_irqsave(host lock)
2055 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
2056 unsigned int buflen)
2058 struct ata_device *dev = args->dev;
2059 u8 *scsicmd = args->cmd->cmnd, *p, *last;
2060 const u8 sat_blk_desc[] = {
2061 0, 0, 0, 0, /* number of blocks: sat unspecified */
2063 0, 0x2, 0x0 /* block length: 512 bytes */
2066 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
2071 six_byte = (scsicmd[0] == MODE_SENSE);
2072 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2074 * LLBA bit in msense(10) ignored (compliant)
2077 page_control = scsicmd[2] >> 6;
2078 switch (page_control) {
2079 case 0: /* current */
2080 break; /* supported */
2082 goto saving_not_supp;
2083 case 1: /* changeable */
2084 case 2: /* defaults */
2090 output_len = 4 + (ebd ? 8 : 0);
2091 alloc_len = scsicmd[4];
2093 output_len = 8 + (ebd ? 8 : 0);
2094 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2096 minlen = (alloc_len < buflen) ? alloc_len : buflen;
2098 p = rbuf + output_len;
2099 last = rbuf + minlen - 1;
2101 pg = scsicmd[2] & 0x3f;
2104 * No mode subpages supported (yet) but asking for _all_
2105 * subpages may be valid
2107 if (spg && (spg != ALL_SUB_MPAGES))
2111 case RW_RECOVERY_MPAGE:
2112 output_len += ata_msense_rw_recovery(&p, last);
2116 output_len += ata_msense_caching(args->id, &p, last);
2119 case CONTROL_MPAGE: {
2120 output_len += ata_msense_ctl_mode(&p, last);
2125 output_len += ata_msense_rw_recovery(&p, last);
2126 output_len += ata_msense_caching(args->id, &p, last);
2127 output_len += ata_msense_ctl_mode(&p, last);
2130 default: /* invalid page code */
2138 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2139 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2144 rbuf[0] = output_len;
2149 rbuf[3] = sizeof(sat_blk_desc);
2151 memcpy(rbuf + 4, sat_blk_desc,
2152 sizeof(sat_blk_desc));
2156 rbuf[0] = output_len >> 8;
2158 rbuf[1] = output_len;
2163 rbuf[7] = sizeof(sat_blk_desc);
2165 memcpy(rbuf + 8, sat_blk_desc,
2166 sizeof(sat_blk_desc));
2172 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2173 /* "Invalid field in cbd" */
2177 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2178 /* "Saving parameters not supported" */
2183 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2184 * @args: device IDENTIFY data / SCSI command of interest.
2185 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2186 * @buflen: Response buffer length.
2188 * Simulate READ CAPACITY commands.
2193 unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2194 unsigned int buflen)
2196 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
2200 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2201 if (last_lba >= 0xffffffffULL)
2202 last_lba = 0xffffffff;
2204 /* sector count, 32-bit */
2205 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3));
2206 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2));
2207 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1));
2208 ATA_SCSI_RBUF_SET(3, last_lba);
2211 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8);
2212 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE & 0xff);
2214 /* sector count, 64-bit */
2215 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7));
2216 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6));
2217 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5));
2218 ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4));
2219 ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3));
2220 ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2));
2221 ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1));
2222 ATA_SCSI_RBUF_SET(7, last_lba);
2225 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8);
2226 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE & 0xff);
2233 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2234 * @args: device IDENTIFY data / SCSI command of interest.
2235 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2236 * @buflen: Response buffer length.
2238 * Simulate REPORT LUNS command.
2241 * spin_lock_irqsave(host lock)
2244 unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2245 unsigned int buflen)
2248 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2254 * ata_scsi_set_sense - Set SCSI sense data and status
2255 * @cmd: SCSI request to be handled
2256 * @sk: SCSI-defined sense key
2257 * @asc: SCSI-defined additional sense code
2258 * @ascq: SCSI-defined additional sense code qualifier
2260 * Helper function that builds a valid fixed format, current
2261 * response code and the given sense key (sk), additional sense
2262 * code (asc) and additional sense code qualifier (ascq) with
2263 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2264 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2270 void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2272 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2274 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2275 cmd->sense_buffer[2] = sk;
2276 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2277 cmd->sense_buffer[12] = asc;
2278 cmd->sense_buffer[13] = ascq;
2282 * ata_scsi_badcmd - End a SCSI request with an error
2283 * @cmd: SCSI request to be handled
2284 * @done: SCSI command completion function
2285 * @asc: SCSI-defined additional sense code
2286 * @ascq: SCSI-defined additional sense code qualifier
2288 * Helper function that completes a SCSI command with
2289 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2290 * and the specified additional sense codes.
2293 * spin_lock_irqsave(host lock)
2296 void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2299 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
2304 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2306 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2307 /* FIXME: not quite right; we don't want the
2308 * translation of taskfile registers into
2309 * a sense descriptors, since that's only
2310 * correct for ATA, not ATAPI
2312 ata_gen_passthru_sense(qc);
2315 qc->scsidone(qc->scsicmd);
2319 /* is it pointless to prefer PIO for "safety reasons"? */
2320 static inline int ata_pio_use_silly(struct ata_port *ap)
2322 return (ap->flags & ATA_FLAG_PIO_DMA);
2325 static void atapi_request_sense(struct ata_queued_cmd *qc)
2327 struct ata_port *ap = qc->ap;
2328 struct scsi_cmnd *cmd = qc->scsicmd;
2330 DPRINTK("ATAPI request sense\n");
2332 /* FIXME: is this needed? */
2333 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2335 ap->ops->tf_read(ap, &qc->tf);
2337 /* fill these in, for the case where they are -not- overwritten */
2338 cmd->sense_buffer[0] = 0x70;
2339 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2343 /* setup sg table and init transfer direction */
2344 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2345 ata_sg_init(qc, &qc->sgent, 1);
2346 qc->dma_dir = DMA_FROM_DEVICE;
2348 memset(&qc->cdb, 0, qc->dev->cdb_len);
2349 qc->cdb[0] = REQUEST_SENSE;
2350 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2352 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2353 qc->tf.command = ATA_CMD_PACKET;
2355 if (ata_pio_use_silly(ap)) {
2356 qc->tf.protocol = ATAPI_PROT_DMA;
2357 qc->tf.feature |= ATAPI_PKT_DMA;
2359 qc->tf.protocol = ATAPI_PROT_PIO;
2360 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2363 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2365 qc->complete_fn = atapi_sense_complete;
2372 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2374 struct scsi_cmnd *cmd = qc->scsicmd;
2375 unsigned int err_mask = qc->err_mask;
2377 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2379 /* handle completion from new EH */
2380 if (unlikely(qc->ap->ops->error_handler &&
2381 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2383 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2384 /* FIXME: not quite right; we don't want the
2385 * translation of taskfile registers into a
2386 * sense descriptors, since that's only
2387 * correct for ATA, not ATAPI
2389 ata_gen_passthru_sense(qc);
2392 /* SCSI EH automatically locks door if sdev->locked is
2393 * set. Sometimes door lock request continues to
2394 * fail, for example, when no media is present. This
2395 * creates a loop - SCSI EH issues door lock which
2396 * fails and gets invoked again to acquire sense data
2397 * for the failed command.
2399 * If door lock fails, always clear sdev->locked to
2400 * avoid this infinite loop.
2402 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2403 qc->dev->sdev->locked = 0;
2405 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2411 /* successful completion or old EH failure path */
2412 if (unlikely(err_mask & AC_ERR_DEV)) {
2413 cmd->result = SAM_STAT_CHECK_CONDITION;
2414 atapi_request_sense(qc);
2416 } else if (unlikely(err_mask)) {
2417 /* FIXME: not quite right; we don't want the
2418 * translation of taskfile registers into
2419 * a sense descriptors, since that's only
2420 * correct for ATA, not ATAPI
2422 ata_gen_passthru_sense(qc);
2424 u8 *scsicmd = cmd->cmnd;
2426 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2428 unsigned int buflen;
2430 buflen = ata_scsi_rbuf_get(cmd, &buf);
2432 /* ATAPI devices typically report zero for their SCSI version,
2433 * and sometimes deviate from the spec WRT response data
2434 * format. If SCSI version is reported as zero like normal,
2435 * then we make the following fixups: 1) Fake MMC-5 version,
2436 * to indicate to the Linux scsi midlayer this is a modern
2437 * device. 2) Ensure response data format / ATAPI information
2438 * are always correct.
2445 ata_scsi_rbuf_put(cmd, buf);
2448 cmd->result = SAM_STAT_GOOD;
2455 * atapi_xlat - Initialize PACKET taskfile
2456 * @qc: command structure to be initialized
2459 * spin_lock_irqsave(host lock)
2462 * Zero on success, non-zero on failure.
2464 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2466 struct scsi_cmnd *scmd = qc->scsicmd;
2467 struct ata_device *dev = qc->dev;
2468 int using_pio = (dev->flags & ATA_DFLAG_PIO);
2469 int nodata = (scmd->sc_data_direction == DMA_NONE);
2470 unsigned int nbytes;
2472 memset(qc->cdb, 0, dev->cdb_len);
2473 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2475 qc->complete_fn = atapi_qc_complete;
2477 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2478 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2479 qc->tf.flags |= ATA_TFLAG_WRITE;
2480 DPRINTK("direction: write\n");
2483 qc->tf.command = ATA_CMD_PACKET;
2484 qc->nbytes = scsi_bufflen(scmd);
2486 /* check whether ATAPI DMA is safe */
2487 if (!using_pio && ata_check_atapi_dma(qc))
2490 /* Some controller variants snoop this value for Packet
2491 * transfers to do state machine and FIFO management. Thus we
2492 * want to set it properly, and for DMA where it is
2493 * effectively meaningless.
2495 nbytes = min(scmd->request->raw_data_len, (unsigned int)63 * 1024);
2497 /* Most ATAPI devices which honor transfer chunk size don't
2498 * behave according to the spec when odd chunk size which
2499 * matches the transfer length is specified. If the number of
2500 * bytes to transfer is 2n+1. According to the spec, what
2501 * should happen is to indicate that 2n+1 is going to be
2502 * transferred and transfer 2n+2 bytes where the last byte is
2505 * In practice, this doesn't happen. ATAPI devices first
2506 * indicate and transfer 2n bytes and then indicate and
2507 * transfer 2 bytes where the last byte is padding.
2509 * This inconsistency confuses several controllers which
2510 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2511 * These controllers use actual number of transferred bytes to
2512 * update DMA poitner and transfer of 4n+2 bytes make those
2513 * controller push DMA pointer by 4n+4 bytes because SATA data
2514 * FISes are aligned to 4 bytes. This causes data corruption
2515 * and buffer overrun.
2517 * Always setting nbytes to even number solves this problem
2518 * because then ATAPI devices don't have to split data at 2n
2524 qc->tf.lbam = (nbytes & 0xFF);
2525 qc->tf.lbah = (nbytes >> 8);
2527 if (using_pio || nodata) {
2528 /* no data, or PIO data xfer */
2530 qc->tf.protocol = ATAPI_PROT_NODATA;
2532 qc->tf.protocol = ATAPI_PROT_PIO;
2535 qc->tf.protocol = ATAPI_PROT_DMA;
2536 qc->tf.feature |= ATAPI_PKT_DMA;
2538 if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE))
2539 /* some SATA bridges need us to indicate data xfer direction */
2540 qc->tf.feature |= ATAPI_DMADIR;
2544 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2545 as ATAPI tape drives don't get this right otherwise */
2549 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2551 if (ap->nr_pmp_links == 0) {
2552 if (likely(devno < ata_link_max_devices(&ap->link)))
2553 return &ap->link.device[devno];
2555 if (likely(devno < ap->nr_pmp_links))
2556 return &ap->pmp_link[devno].device[0];
2562 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2563 const struct scsi_device *scsidev)
2567 /* skip commands not addressed to targets we simulate */
2568 if (ap->nr_pmp_links == 0) {
2569 if (unlikely(scsidev->channel || scsidev->lun))
2571 devno = scsidev->id;
2573 if (unlikely(scsidev->id || scsidev->lun))
2575 devno = scsidev->channel;
2578 return ata_find_dev(ap, devno);
2582 * ata_scsi_dev_enabled - determine if device is enabled
2585 * Determine if commands should be sent to the specified device.
2588 * spin_lock_irqsave(host lock)
2591 * 0 if commands are not allowed / 1 if commands are allowed
2594 static int ata_scsi_dev_enabled(struct ata_device *dev)
2596 if (unlikely(!ata_dev_enabled(dev)))
2599 if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) {
2600 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2601 ata_dev_printk(dev, KERN_WARNING,
2602 "WARNING: ATAPI is %s, device ignored.\n",
2603 atapi_enabled ? "not supported with this driver" : "disabled");
2612 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2613 * @ap: ATA port to which the device is attached
2614 * @scsidev: SCSI device from which we derive the ATA device
2616 * Given various information provided in struct scsi_cmnd,
2617 * map that onto an ATA bus, and using that mapping
2618 * determine which ata_device is associated with the
2619 * SCSI command to be sent.
2622 * spin_lock_irqsave(host lock)
2625 * Associated ATA device, or %NULL if not found.
2627 static struct ata_device *
2628 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2630 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2632 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
2639 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2640 * @byte1: Byte 1 from pass-thru CDB.
2643 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2646 ata_scsi_map_proto(u8 byte1)
2648 switch((byte1 & 0x1e) >> 1) {
2649 case 3: /* Non-data */
2650 return ATA_PROT_NODATA;
2653 case 10: /* UDMA Data-in */
2654 case 11: /* UDMA Data-Out */
2655 return ATA_PROT_DMA;
2657 case 4: /* PIO Data-in */
2658 case 5: /* PIO Data-out */
2659 return ATA_PROT_PIO;
2661 case 0: /* Hard Reset */
2663 case 8: /* Device Diagnostic */
2664 case 9: /* Device Reset */
2665 case 7: /* DMA Queued */
2666 case 12: /* FPDMA */
2667 case 15: /* Return Response Info */
2668 default: /* Reserved */
2672 return ATA_PROT_UNKNOWN;
2676 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2677 * @qc: command structure to be initialized
2679 * Handles either 12 or 16-byte versions of the CDB.
2682 * Zero on success, non-zero on failure.
2684 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2686 struct ata_taskfile *tf = &(qc->tf);
2687 struct scsi_cmnd *scmd = qc->scsicmd;
2688 struct ata_device *dev = qc->dev;
2689 const u8 *cdb = scmd->cmnd;
2691 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2695 * Filter TPM commands by default. These provide an
2696 * essentially uncontrolled encrypted "back door" between
2697 * applications and the disk. Set libata.allow_tpm=1 if you
2698 * have a real reason for wanting to use them. This ensures
2699 * that installed software cannot easily mess stuff up without
2700 * user intent. DVR type users will probably ship with this enabled
2701 * for movie content management.
2703 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2704 * for this and should do in future but that it is not sufficient as
2705 * DCS is an optional feature set. Thus we also do the software filter
2706 * so that we comply with the TC consortium stated goal that the user
2707 * can turn off TC features of their system.
2709 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
2712 /* We may not issue DMA commands if no DMA mode is set */
2713 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2717 * 12 and 16 byte CDBs use different offsets to
2718 * provide the various register values.
2720 if (cdb[0] == ATA_16) {
2722 * 16-byte CDB - may contain extended commands.
2724 * If that is the case, copy the upper byte register values.
2726 if (cdb[1] & 0x01) {
2727 tf->hob_feature = cdb[3];
2728 tf->hob_nsect = cdb[5];
2729 tf->hob_lbal = cdb[7];
2730 tf->hob_lbam = cdb[9];
2731 tf->hob_lbah = cdb[11];
2732 tf->flags |= ATA_TFLAG_LBA48;
2734 tf->flags &= ~ATA_TFLAG_LBA48;
2737 * Always copy low byte, device and command registers.
2739 tf->feature = cdb[4];
2744 tf->device = cdb[13];
2745 tf->command = cdb[14];
2748 * 12-byte CDB - incapable of extended commands.
2750 tf->flags &= ~ATA_TFLAG_LBA48;
2752 tf->feature = cdb[3];
2757 tf->device = cdb[8];
2758 tf->command = cdb[9];
2761 /* enforce correct master/slave bit */
2762 tf->device = dev->devno ?
2763 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2765 /* sanity check for pio multi commands */
2766 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2769 if (is_multi_taskfile(tf)) {
2770 unsigned int multi_count = 1 << (cdb[1] >> 5);
2772 /* compare the passed through multi_count
2773 * with the cached multi_count of libata
2775 if (multi_count != dev->multi_count)
2776 ata_dev_printk(dev, KERN_WARNING,
2777 "invalid multi_count %u ignored\n",
2781 /* READ/WRITE LONG use a non-standard sect_size */
2782 qc->sect_size = ATA_SECT_SIZE;
2783 switch (tf->command) {
2784 case ATA_CMD_READ_LONG:
2785 case ATA_CMD_READ_LONG_ONCE:
2786 case ATA_CMD_WRITE_LONG:
2787 case ATA_CMD_WRITE_LONG_ONCE:
2788 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2790 qc->sect_size = scsi_bufflen(scmd);
2794 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2795 * SET_FEATURES - XFER MODE must be preceded/succeeded
2796 * by an update to hardware-specific registers for each
2797 * controller (i.e. the reason for ->set_piomode(),
2798 * ->set_dmamode(), and ->post_set_mode() hooks).
2800 if ((tf->command == ATA_CMD_SET_FEATURES)
2801 && (tf->feature == SETFEATURES_XFER))
2805 * Set flags so that all registers will be written,
2806 * and pass on write indication (used for PIO/DMA
2809 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2811 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2812 tf->flags |= ATA_TFLAG_WRITE;
2815 * Set transfer length.
2817 * TODO: find out if we need to do more here to
2818 * cover scatter/gather case.
2820 qc->nbytes = scsi_bufflen(scmd);
2822 /* request result TF and be quiet about device error */
2823 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2828 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
2829 /* "Invalid field in cdb" */
2834 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2836 * @cmd: SCSI command opcode to consider
2838 * Look up the SCSI command given, and determine whether the
2839 * SCSI command is to be translated or simulated.
2842 * Pointer to translation function if possible, %NULL if not.
2845 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2855 return ata_scsi_rw_xlat;
2857 case SYNCHRONIZE_CACHE:
2858 if (ata_try_flush_cache(dev))
2859 return ata_scsi_flush_xlat;
2864 return ata_scsi_verify_xlat;
2868 return ata_scsi_pass_thru;
2871 return ata_scsi_start_stop_xlat;
2878 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2879 * @ap: ATA port to which the command was being sent
2880 * @cmd: SCSI command to dump
2882 * Prints the contents of a SCSI command via printk().
2885 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2886 struct scsi_cmnd *cmd)
2889 struct scsi_device *scsidev = cmd->device;
2890 u8 *scsicmd = cmd->cmnd;
2892 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2894 scsidev->channel, scsidev->id, scsidev->lun,
2895 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2896 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2901 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2902 void (*done)(struct scsi_cmnd *),
2903 struct ata_device *dev)
2905 u8 scsi_op = scmd->cmnd[0];
2906 ata_xlat_func_t xlat_func;
2909 if (dev->class == ATA_DEV_ATA) {
2910 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2913 xlat_func = ata_get_xlat_func(dev, scsi_op);
2915 if (unlikely(!scmd->cmd_len))
2919 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2920 /* relay SCSI command to ATAPI device */
2921 int len = COMMAND_SIZE(scsi_op);
2922 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
2925 xlat_func = atapi_xlat;
2927 /* ATA_16 passthru, treat as an ATA command */
2928 if (unlikely(scmd->cmd_len > 16))
2931 xlat_func = ata_get_xlat_func(dev, scsi_op);
2936 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
2938 ata_scsi_simulate(dev, scmd, done);
2943 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
2944 scmd->cmd_len, scsi_op, dev->cdb_len);
2945 scmd->result = DID_ERROR << 16;
2951 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2952 * @cmd: SCSI command to be sent
2953 * @done: Completion function, called when command is complete
2955 * In some cases, this function translates SCSI commands into
2956 * ATA taskfiles, and queues the taskfiles to be sent to
2957 * hardware. In other cases, this function simulates a
2958 * SCSI device by evaluating and responding to certain
2959 * SCSI commands. This creates the overall effect of
2960 * ATA and ATAPI devices appearing as SCSI devices.
2963 * Releases scsi-layer-held lock, and obtains host lock.
2966 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2969 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2971 struct ata_port *ap;
2972 struct ata_device *dev;
2973 struct scsi_device *scsidev = cmd->device;
2974 struct Scsi_Host *shost = scsidev->host;
2977 ap = ata_shost_to_port(shost);
2979 spin_unlock(shost->host_lock);
2980 spin_lock(ap->lock);
2982 ata_scsi_dump_cdb(ap, cmd);
2984 dev = ata_scsi_find_dev(ap, scsidev);
2986 rc = __ata_scsi_queuecmd(cmd, done, dev);
2988 cmd->result = (DID_BAD_TARGET << 16);
2992 spin_unlock(ap->lock);
2993 spin_lock(shost->host_lock);
2998 * ata_scsi_simulate - simulate SCSI command on ATA device
2999 * @dev: the target device
3000 * @cmd: SCSI command being sent to device.
3001 * @done: SCSI command completion function.
3003 * Interprets and directly executes a select list of SCSI commands
3004 * that can be handled internally.
3007 * spin_lock_irqsave(host lock)
3010 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
3011 void (*done)(struct scsi_cmnd *))
3013 struct ata_scsi_args args;
3014 const u8 *scsicmd = cmd->cmnd;
3022 switch(scsicmd[0]) {
3023 /* TODO: worth improving? */
3025 ata_scsi_invalid_field(cmd, done);
3029 if (scsicmd[1] & 2) /* is CmdDt set? */
3030 ata_scsi_invalid_field(cmd, done);
3031 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3032 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3033 else switch (scsicmd[2]) {
3035 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
3038 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
3041 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
3044 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3047 ata_scsi_invalid_field(cmd, done);
3054 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3057 case MODE_SELECT: /* unconditionally return */
3058 case MODE_SELECT_10: /* bad-field-in-cdb */
3059 ata_scsi_invalid_field(cmd, done);
3063 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3066 case SERVICE_ACTION_IN:
3067 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3068 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3070 ata_scsi_invalid_field(cmd, done);
3074 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3078 ata_scsi_set_sense(cmd, 0, 0, 0);
3079 cmd->result = (DRIVER_SENSE << 24);
3083 /* if we reach this, then writeback caching is disabled,
3084 * turning this into a no-op.
3086 case SYNCHRONIZE_CACHE:
3089 /* no-op's, complete with success */
3093 case TEST_UNIT_READY:
3094 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3097 case SEND_DIAGNOSTIC:
3098 tmp8 = scsicmd[1] & ~(1 << 3);
3099 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3100 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3102 ata_scsi_invalid_field(cmd, done);
3105 /* all other commands */
3107 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3108 /* "Invalid command operation code" */
3114 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3118 for (i = 0; i < host->n_ports; i++) {
3119 struct ata_port *ap = host->ports[i];
3120 struct Scsi_Host *shost;
3123 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3127 *(struct ata_port **)&shost->hostdata[0] = ap;
3128 ap->scsi_host = shost;
3130 shost->transportt = &ata_scsi_transport_template;
3131 shost->unique_id = ap->print_id;
3134 shost->max_channel = 1;
3135 shost->max_cmd_len = 16;
3137 /* Schedule policy is determined by ->qc_defer()
3138 * callback and it needs to see every deferred qc.
3139 * Set host_blocked to 1 to prevent SCSI midlayer from
3140 * automatically deferring requests.
3142 shost->max_host_blocked = 1;
3144 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3152 scsi_host_put(host->ports[i]->scsi_host);
3155 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3157 scsi_remove_host(shost);
3158 scsi_host_put(shost);
3163 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3166 struct ata_device *last_failed_dev = NULL;
3167 struct ata_link *link;
3168 struct ata_device *dev;
3170 if (ap->flags & ATA_FLAG_DISABLED)
3174 ata_port_for_each_link(link, ap) {
3175 ata_link_for_each_dev(dev, link) {
3176 struct scsi_device *sdev;
3177 int channel = 0, id = 0;
3179 if (!ata_dev_enabled(dev) || dev->sdev)
3182 if (ata_is_host_link(link))
3185 channel = link->pmp;
3187 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3189 if (!IS_ERR(sdev)) {
3191 scsi_device_put(sdev);
3196 /* If we scanned while EH was in progress or allocation
3197 * failure occurred, scan would have failed silently. Check
3198 * whether all devices are attached.
3200 ata_port_for_each_link(link, ap) {
3201 ata_link_for_each_dev(dev, link) {
3202 if (ata_dev_enabled(dev) && !dev->sdev)
3210 /* we're missing some SCSI devices */
3212 /* If caller requested synchrnous scan && we've made
3213 * any progress, sleep briefly and repeat.
3215 if (dev != last_failed_dev) {
3217 last_failed_dev = dev;
3221 /* We might be failing to detect boot device, give it
3222 * a few more chances.
3229 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3230 "failed without making any progress,\n"
3231 " switching to async\n");
3234 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3235 round_jiffies_relative(HZ));
3239 * ata_scsi_offline_dev - offline attached SCSI device
3240 * @dev: ATA device to offline attached SCSI device for
3242 * This function is called from ata_eh_hotplug() and responsible
3243 * for taking the SCSI device attached to @dev offline. This
3244 * function is called with host lock which protects dev->sdev
3248 * spin_lock_irqsave(host lock)
3251 * 1 if attached SCSI device exists, 0 otherwise.
3253 int ata_scsi_offline_dev(struct ata_device *dev)
3256 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3263 * ata_scsi_remove_dev - remove attached SCSI device
3264 * @dev: ATA device to remove attached SCSI device for
3266 * This function is called from ata_eh_scsi_hotplug() and
3267 * responsible for removing the SCSI device attached to @dev.
3270 * Kernel thread context (may sleep).
3272 static void ata_scsi_remove_dev(struct ata_device *dev)
3274 struct ata_port *ap = dev->link->ap;
3275 struct scsi_device *sdev;
3276 unsigned long flags;
3278 /* Alas, we need to grab scan_mutex to ensure SCSI device
3279 * state doesn't change underneath us and thus
3280 * scsi_device_get() always succeeds. The mutex locking can
3281 * be removed if there is __scsi_device_get() interface which
3282 * increments reference counts regardless of device state.
3284 mutex_lock(&ap->scsi_host->scan_mutex);
3285 spin_lock_irqsave(ap->lock, flags);
3287 /* clearing dev->sdev is protected by host lock */
3292 /* If user initiated unplug races with us, sdev can go
3293 * away underneath us after the host lock and
3294 * scan_mutex are released. Hold onto it.
3296 if (scsi_device_get(sdev) == 0) {
3297 /* The following ensures the attached sdev is
3298 * offline on return from ata_scsi_offline_dev()
3299 * regardless it wins or loses the race
3300 * against this function.
3302 scsi_device_set_state(sdev, SDEV_OFFLINE);
3309 spin_unlock_irqrestore(ap->lock, flags);
3310 mutex_unlock(&ap->scsi_host->scan_mutex);
3313 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3314 sdev->sdev_gendev.bus_id);
3316 scsi_remove_device(sdev);
3317 scsi_device_put(sdev);
3321 static void ata_scsi_handle_link_detach(struct ata_link *link)
3323 struct ata_port *ap = link->ap;
3324 struct ata_device *dev;
3326 ata_link_for_each_dev(dev, link) {
3327 unsigned long flags;
3329 if (!(dev->flags & ATA_DFLAG_DETACHED))
3332 spin_lock_irqsave(ap->lock, flags);
3333 dev->flags &= ~ATA_DFLAG_DETACHED;
3334 spin_unlock_irqrestore(ap->lock, flags);
3336 ata_scsi_remove_dev(dev);
3341 * ata_scsi_media_change_notify - send media change event
3342 * @dev: Pointer to the disk device with media change event
3344 * Tell the block layer to send a media change notification
3348 * spin_lock_irqsave(host lock)
3350 void ata_scsi_media_change_notify(struct ata_device *dev)
3353 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3358 * ata_scsi_hotplug - SCSI part of hotplug
3359 * @work: Pointer to ATA port to perform SCSI hotplug on
3361 * Perform SCSI part of hotplug. It's executed from a separate
3362 * workqueue after EH completes. This is necessary because SCSI
3363 * hot plugging requires working EH and hot unplugging is
3364 * synchronized with hot plugging with a mutex.
3367 * Kernel thread context (may sleep).
3369 void ata_scsi_hotplug(struct work_struct *work)
3371 struct ata_port *ap =
3372 container_of(work, struct ata_port, hotplug_task.work);
3375 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3376 DPRINTK("ENTER/EXIT - unloading\n");
3382 /* Unplug detached devices. We cannot use link iterator here
3383 * because PMP links have to be scanned even if PMP is
3384 * currently not attached. Iterate manually.
3386 ata_scsi_handle_link_detach(&ap->link);
3388 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3389 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3391 /* scan for new ones */
3392 ata_scsi_scan_host(ap, 0);
3398 * ata_scsi_user_scan - indication for user-initiated bus scan
3399 * @shost: SCSI host to scan
3400 * @channel: Channel to scan
3404 * This function is called when user explicitly requests bus
3405 * scan. Set probe pending flag and invoke EH.
3408 * SCSI layer (we don't care)
3413 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3414 unsigned int id, unsigned int lun)
3416 struct ata_port *ap = ata_shost_to_port(shost);
3417 unsigned long flags;
3420 if (!ap->ops->error_handler)
3423 if (lun != SCAN_WILD_CARD && lun)
3426 if (ap->nr_pmp_links == 0) {
3427 if (channel != SCAN_WILD_CARD && channel)
3431 if (id != SCAN_WILD_CARD && id)
3436 spin_lock_irqsave(ap->lock, flags);
3438 if (devno == SCAN_WILD_CARD) {
3439 struct ata_link *link;
3441 ata_port_for_each_link(link, ap) {
3442 struct ata_eh_info *ehi = &link->eh_info;
3443 ehi->probe_mask |= (1 << ata_link_max_devices(link)) - 1;
3444 ehi->action |= ATA_EH_SOFTRESET;
3447 struct ata_device *dev = ata_find_dev(ap, devno);
3450 struct ata_eh_info *ehi = &dev->link->eh_info;
3451 ehi->probe_mask |= 1 << dev->devno;
3452 ehi->action |= ATA_EH_SOFTRESET;
3453 ehi->flags |= ATA_EHI_RESUME_LINK;
3459 ata_port_schedule_eh(ap);
3460 spin_unlock_irqrestore(ap->lock, flags);
3461 ata_port_wait_eh(ap);
3463 spin_unlock_irqrestore(ap->lock, flags);
3469 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3470 * @work: Pointer to ATA port to perform scsi_rescan_device()
3472 * After ATA pass thru (SAT) commands are executed successfully,
3473 * libata need to propagate the changes to SCSI layer. This
3474 * function must be executed from ata_aux_wq such that sdev
3475 * attach/detach don't race with rescan.
3478 * Kernel thread context (may sleep).
3480 void ata_scsi_dev_rescan(struct work_struct *work)
3482 struct ata_port *ap =
3483 container_of(work, struct ata_port, scsi_rescan_task);
3484 struct ata_link *link;
3485 struct ata_device *dev;
3486 unsigned long flags;
3488 spin_lock_irqsave(ap->lock, flags);
3490 ata_port_for_each_link(link, ap) {
3491 ata_link_for_each_dev(dev, link) {
3492 struct scsi_device *sdev = dev->sdev;
3494 if (!ata_dev_enabled(dev) || !sdev)
3496 if (scsi_device_get(sdev))
3499 spin_unlock_irqrestore(ap->lock, flags);
3500 scsi_rescan_device(&(sdev->sdev_gendev));
3501 scsi_device_put(sdev);
3502 spin_lock_irqsave(ap->lock, flags);
3506 spin_unlock_irqrestore(ap->lock, flags);
3510 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3511 * @host: ATA host container for all SAS ports
3512 * @port_info: Information from low-level host driver
3513 * @shost: SCSI host that the scsi device is attached to
3516 * PCI/etc. bus probe sem.
3519 * ata_port pointer on success / NULL on failure.
3522 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3523 struct ata_port_info *port_info,
3524 struct Scsi_Host *shost)
3526 struct ata_port *ap;
3528 ap = ata_port_alloc(host);
3533 ap->lock = shost->host_lock;
3534 ap->pio_mask = port_info->pio_mask;
3535 ap->mwdma_mask = port_info->mwdma_mask;
3536 ap->udma_mask = port_info->udma_mask;
3537 ap->flags |= port_info->flags;
3538 ap->ops = port_info->port_ops;
3539 ap->cbl = ATA_CBL_SATA;
3543 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3546 * ata_sas_port_start - Set port up for dma.
3547 * @ap: Port to initialize
3549 * Called just after data structures for each port are
3552 * May be used as the port_start() entry in ata_port_operations.
3555 * Inherited from caller.
3557 int ata_sas_port_start(struct ata_port *ap)
3561 EXPORT_SYMBOL_GPL(ata_sas_port_start);
3564 * ata_port_stop - Undo ata_sas_port_start()
3565 * @ap: Port to shut down
3567 * May be used as the port_stop() entry in ata_port_operations.
3570 * Inherited from caller.
3573 void ata_sas_port_stop(struct ata_port *ap)
3576 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3579 * ata_sas_port_init - Initialize a SATA device
3580 * @ap: SATA port to initialize
3583 * PCI/etc. bus probe sem.
3586 * Zero on success, non-zero on error.
3589 int ata_sas_port_init(struct ata_port *ap)
3591 int rc = ap->ops->port_start(ap);
3594 ap->print_id = ata_print_id++;
3595 rc = ata_bus_probe(ap);
3600 EXPORT_SYMBOL_GPL(ata_sas_port_init);
3603 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3604 * @ap: SATA port to destroy
3608 void ata_sas_port_destroy(struct ata_port *ap)
3610 if (ap->ops->port_stop)
3611 ap->ops->port_stop(ap);
3614 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3617 * ata_sas_slave_configure - Default slave_config routine for libata devices
3618 * @sdev: SCSI device to configure
3619 * @ap: ATA port to which SCSI device is attached
3625 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3627 ata_scsi_sdev_config(sdev);
3628 ata_scsi_dev_config(sdev, ap->link.device);
3631 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3634 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3635 * @cmd: SCSI command to be sent
3636 * @done: Completion function, called when command is complete
3637 * @ap: ATA port to which the command is being sent
3640 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3644 int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3645 struct ata_port *ap)
3649 ata_scsi_dump_cdb(ap, cmd);
3651 if (likely(ata_scsi_dev_enabled(ap->link.device)))
3652 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
3654 cmd->result = (DID_BAD_TARGET << 16);
3659 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);