2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/kernel.h>
37 #include <linux/blkdev.h>
38 #include <linux/spinlock.h>
39 #include <scsi/scsi.h>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_cmnd.h>
42 #include <scsi/scsi_eh.h>
43 #include <scsi/scsi_device.h>
44 #include <scsi/scsi_tcq.h>
45 #include <scsi/scsi_transport.h>
46 #include <linux/libata.h>
47 #include <linux/hdreg.h>
48 #include <asm/uaccess.h>
52 #define SECTOR_SIZE 512
54 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
56 static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
57 const struct scsi_device *scsidev);
58 static struct ata_device * ata_scsi_find_dev(struct ata_port *ap,
59 const struct scsi_device *scsidev);
60 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
61 unsigned int id, unsigned int lun);
64 #define RW_RECOVERY_MPAGE 0x1
65 #define RW_RECOVERY_MPAGE_LEN 12
66 #define CACHE_MPAGE 0x8
67 #define CACHE_MPAGE_LEN 20
68 #define CONTROL_MPAGE 0xa
69 #define CONTROL_MPAGE_LEN 12
70 #define ALL_MPAGES 0x3f
71 #define ALL_SUB_MPAGES 0xff
74 static const u8 def_rw_recovery_mpage[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 void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
114 void (*done)(struct scsi_cmnd *))
116 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
117 /* "Invalid field in cbd" */
122 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
123 * @sdev: SCSI device for which BIOS geometry is to be determined
124 * @bdev: block device associated with @sdev
125 * @capacity: capacity of SCSI device
126 * @geom: location to which geometry will be output
128 * Generic bios head/sector/cylinder calculator
129 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
130 * mapping. Some situations may arise where the disk is not
131 * bootable if this is not used.
134 * Defined by the SCSI layer. We don't really care.
139 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
140 sector_t capacity, int geom[])
144 sector_div(capacity, 255*63);
151 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
152 * @sdev: SCSI device to get identify data for
153 * @arg: User buffer area for identify data
156 * Defined by the SCSI layer. We don't really care.
159 * Zero on success, negative errno on error.
161 static int ata_get_identity(struct scsi_device *sdev, void __user *arg)
163 struct ata_port *ap = ata_shost_to_port(sdev->host);
164 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
165 u16 __user *dst = arg;
171 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
174 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
175 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
178 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
179 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
182 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
183 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
190 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
191 * @scsidev: Device to which we are issuing command
192 * @arg: User provided data for issuing command
195 * Defined by the SCSI layer. We don't really care.
198 * Zero on success, negative errno on error.
200 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
203 u8 scsi_cmd[MAX_COMMAND_SIZE];
204 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
206 enum dma_data_direction data_dir;
212 if (copy_from_user(args, arg, sizeof(args)))
215 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
219 memset(scsi_cmd, 0, sizeof(scsi_cmd));
222 argsize = SECTOR_SIZE * args[3];
223 argbuf = kmalloc(argsize, GFP_KERNEL);
224 if (argbuf == NULL) {
229 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
230 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
231 block count in sector count field */
232 data_dir = DMA_FROM_DEVICE;
234 scsi_cmd[1] = (3 << 1); /* Non-data */
235 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
239 scsi_cmd[0] = ATA_16;
241 scsi_cmd[4] = args[2];
242 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
243 scsi_cmd[6] = args[3];
244 scsi_cmd[8] = args[1];
248 scsi_cmd[6] = args[1];
250 scsi_cmd[14] = args[0];
252 /* Good values for timeout and retries? Values below
253 from scsi_ioctl_send_command() for default case... */
254 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
255 sensebuf, (10*HZ), 5, 0);
257 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
258 u8 *desc = sensebuf + 8;
259 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
261 /* If we set cc then ATA pass-through will cause a
262 * check condition even if no error. Filter that. */
263 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
264 struct scsi_sense_hdr sshdr;
265 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
267 if (sshdr.sense_key==0 &&
268 sshdr.asc==0 && sshdr.ascq==0)
269 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
272 /* Send userspace a few ATA registers (same as drivers/ide) */
273 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
274 desc[0] == 0x09 ) { /* code is "ATA Descriptor" */
275 args[0] = desc[13]; /* status */
276 args[1] = desc[3]; /* error */
277 args[2] = desc[5]; /* sector count (0:7) */
278 if (copy_to_user(arg, args, sizeof(args)))
290 && copy_to_user(arg + sizeof(args), argbuf, argsize))
299 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
300 * @scsidev: Device to which we are issuing command
301 * @arg: User provided data for issuing command
304 * Defined by the SCSI layer. We don't really care.
307 * Zero on success, negative errno on error.
309 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
312 u8 scsi_cmd[MAX_COMMAND_SIZE];
313 u8 args[7], *sensebuf = NULL;
319 if (copy_from_user(args, arg, sizeof(args)))
322 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
326 memset(scsi_cmd, 0, sizeof(scsi_cmd));
327 scsi_cmd[0] = ATA_16;
328 scsi_cmd[1] = (3 << 1); /* Non-data */
329 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
330 scsi_cmd[4] = args[1];
331 scsi_cmd[6] = args[2];
332 scsi_cmd[8] = args[3];
333 scsi_cmd[10] = args[4];
334 scsi_cmd[12] = args[5];
335 scsi_cmd[13] = args[6] & 0x4f;
336 scsi_cmd[14] = args[0];
338 /* Good values for timeout and retries? Values below
339 from scsi_ioctl_send_command() for default case... */
340 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
341 sensebuf, (10*HZ), 5, 0);
343 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
344 u8 *desc = sensebuf + 8;
345 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
347 /* If we set cc then ATA pass-through will cause a
348 * check condition even if no error. Filter that. */
349 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
350 struct scsi_sense_hdr sshdr;
351 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
353 if (sshdr.sense_key==0 &&
354 sshdr.asc==0 && sshdr.ascq==0)
355 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
358 /* Send userspace ATA registers */
359 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
360 desc[0] == 0x09) {/* code is "ATA Descriptor" */
361 args[0] = desc[13]; /* status */
362 args[1] = desc[3]; /* error */
363 args[2] = desc[5]; /* sector count (0:7) */
364 args[3] = desc[7]; /* lbal */
365 args[4] = desc[9]; /* lbam */
366 args[5] = desc[11]; /* lbah */
367 args[6] = desc[12]; /* select */
368 if (copy_to_user(arg, args, sizeof(args)))
383 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
385 int val = -EINVAL, rc = -EINVAL;
388 case ATA_IOC_GET_IO32:
390 if (copy_to_user(arg, &val, 1))
394 case ATA_IOC_SET_IO32:
395 val = (unsigned long) arg;
400 case HDIO_GET_IDENTITY:
401 return ata_get_identity(scsidev, arg);
404 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
406 return ata_cmd_ioctl(scsidev, arg);
408 case HDIO_DRIVE_TASK:
409 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
411 return ata_task_ioctl(scsidev, arg);
422 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
423 * @dev: ATA device to which the new command is attached
424 * @cmd: SCSI command that originated this ATA command
425 * @done: SCSI command completion function
427 * Obtain a reference to an unused ata_queued_cmd structure,
428 * which is the basic libata structure representing a single
429 * ATA command sent to the hardware.
431 * If a command was available, fill in the SCSI-specific
432 * portions of the structure with information on the
436 * spin_lock_irqsave(host lock)
439 * Command allocated, or %NULL if none available.
441 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
442 struct scsi_cmnd *cmd,
443 void (*done)(struct scsi_cmnd *))
445 struct ata_queued_cmd *qc;
447 qc = ata_qc_new_init(dev);
452 qc->__sg = scsi_sglist(cmd);
453 qc->n_elem = scsi_sg_count(cmd);
455 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
463 * ata_dump_status - user friendly display of error info
464 * @id: id of the port in question
465 * @tf: ptr to filled out taskfile
467 * Decode and dump the ATA error/status registers for the user so
468 * that they have some idea what really happened at the non
469 * make-believe layer.
472 * inherited from caller
474 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
476 u8 stat = tf->command, err = tf->feature;
478 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
479 if (stat & ATA_BUSY) {
480 printk("Busy }\n"); /* Data is not valid in this case */
482 if (stat & 0x40) printk("DriveReady ");
483 if (stat & 0x20) printk("DeviceFault ");
484 if (stat & 0x10) printk("SeekComplete ");
485 if (stat & 0x08) printk("DataRequest ");
486 if (stat & 0x04) printk("CorrectedError ");
487 if (stat & 0x02) printk("Index ");
488 if (stat & 0x01) printk("Error ");
492 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
493 if (err & 0x04) printk("DriveStatusError ");
495 if (err & 0x04) printk("BadCRC ");
496 else printk("Sector ");
498 if (err & 0x40) printk("UncorrectableError ");
499 if (err & 0x10) printk("SectorIdNotFound ");
500 if (err & 0x02) printk("TrackZeroNotFound ");
501 if (err & 0x01) printk("AddrMarkNotFound ");
508 * ata_to_sense_error - convert ATA error to SCSI error
509 * @id: ATA device number
510 * @drv_stat: value contained in ATA status register
511 * @drv_err: value contained in ATA error register
512 * @sk: the sense key we'll fill out
513 * @asc: the additional sense code we'll fill out
514 * @ascq: the additional sense code qualifier we'll fill out
515 * @verbose: be verbose
517 * Converts an ATA error into a SCSI error. Fill out pointers to
518 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
519 * format sense blocks.
522 * spin_lock_irqsave(host lock)
524 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
525 u8 *asc, u8 *ascq, int verbose)
529 /* Based on the 3ware driver translation table */
530 static const unsigned char sense_table[][4] = {
532 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
534 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
536 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
537 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
538 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
539 /* MC|ID|ABRT|TRK0|MARK */
540 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
542 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
543 /* Bad address mark */
544 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
546 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
548 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
549 /* Media change request */
550 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
552 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
554 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
556 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
557 /* BBD - block marked bad */
558 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
559 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
561 static const unsigned char stat_table[][4] = {
562 /* Must be first because BUSY means no other bits valid */
563 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
564 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
565 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
566 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
567 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
571 * Is this an error we can process/parse
573 if (drv_stat & ATA_BUSY) {
574 drv_err = 0; /* Ignore the err bits, they're invalid */
578 /* Look for drv_err */
579 for (i = 0; sense_table[i][0] != 0xFF; i++) {
580 /* Look for best matches first */
581 if ((sense_table[i][0] & drv_err) ==
583 *sk = sense_table[i][1];
584 *asc = sense_table[i][2];
585 *ascq = sense_table[i][3];
589 /* No immediate match */
591 printk(KERN_WARNING "ata%u: no sense translation for "
592 "error 0x%02x\n", id, drv_err);
595 /* Fall back to interpreting status bits */
596 for (i = 0; stat_table[i][0] != 0xFF; i++) {
597 if (stat_table[i][0] & drv_stat) {
598 *sk = stat_table[i][1];
599 *asc = stat_table[i][2];
600 *ascq = stat_table[i][3];
604 /* No error? Undecoded? */
606 printk(KERN_WARNING "ata%u: no sense translation for "
607 "status: 0x%02x\n", id, drv_stat);
609 /* We need a sensible error return here, which is tricky, and one
610 that won't cause people to do things like return a disk wrongly */
611 *sk = ABORTED_COMMAND;
617 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
618 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
619 id, drv_stat, drv_err, *sk, *asc, *ascq);
624 * ata_gen_passthru_sense - Generate check condition sense block.
625 * @qc: Command that completed.
627 * This function is specific to the ATA descriptor format sense
628 * block specified for the ATA pass through commands. Regardless
629 * of whether the command errored or not, return a sense
630 * block. Copy all controller registers into the sense
631 * block. Clear sense key, ASC & ASCQ if there is no error.
636 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
638 struct scsi_cmnd *cmd = qc->scsicmd;
639 struct ata_taskfile *tf = &qc->result_tf;
640 unsigned char *sb = cmd->sense_buffer;
641 unsigned char *desc = sb + 8;
642 int verbose = qc->ap->ops->error_handler == NULL;
644 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
646 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
649 * Use ata_to_sense_error() to map status register bits
650 * onto sense key, asc & ascq.
653 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
654 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
655 &sb[1], &sb[2], &sb[3], verbose);
660 * Sense data is current and format is descriptor.
666 /* set length of additional sense data */
671 * Copy registers into sense buffer.
674 desc[3] = tf->feature; /* == error reg */
679 desc[12] = tf->device;
680 desc[13] = tf->command; /* == status reg */
683 * Fill in Extend bit, and the high order bytes
686 if (tf->flags & ATA_TFLAG_LBA48) {
688 desc[4] = tf->hob_nsect;
689 desc[6] = tf->hob_lbal;
690 desc[8] = tf->hob_lbam;
691 desc[10] = tf->hob_lbah;
696 * ata_gen_ata_sense - generate a SCSI fixed sense block
697 * @qc: Command that we are erroring out
699 * Generate sense block for a failed ATA command @qc. Descriptor
700 * format is used to accomodate LBA48 block address.
705 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
707 struct ata_device *dev = qc->dev;
708 struct scsi_cmnd *cmd = qc->scsicmd;
709 struct ata_taskfile *tf = &qc->result_tf;
710 unsigned char *sb = cmd->sense_buffer;
711 unsigned char *desc = sb + 8;
712 int verbose = qc->ap->ops->error_handler == NULL;
715 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
717 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
719 /* sense data is current and format is descriptor */
722 /* Use ata_to_sense_error() to map status register bits
723 * onto sense key, asc & ascq.
726 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
727 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
728 &sb[1], &sb[2], &sb[3], verbose);
732 block = ata_tf_read_block(&qc->result_tf, dev);
734 /* information sense data descriptor */
739 desc[2] |= 0x80; /* valid */
740 desc[6] = block >> 40;
741 desc[7] = block >> 32;
742 desc[8] = block >> 24;
743 desc[9] = block >> 16;
744 desc[10] = block >> 8;
748 static void ata_scsi_sdev_config(struct scsi_device *sdev)
750 sdev->use_10_for_rw = 1;
751 sdev->use_10_for_ms = 1;
753 /* Schedule policy is determined by ->qc_defer() callback and
754 * it needs to see every deferred qc. Set dev_blocked to 1 to
755 * prevent SCSI midlayer from automatically deferring
758 sdev->max_device_blocked = 1;
761 static void ata_scsi_dev_config(struct scsi_device *sdev,
762 struct ata_device *dev)
764 /* configure max sectors */
765 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
767 /* SATA DMA transfers must be multiples of 4 byte, so
768 * we need to pad ATAPI transfers using an extra sg.
769 * Decrement max hw segments accordingly.
771 if (dev->class == ATA_DEV_ATAPI) {
772 struct request_queue *q = sdev->request_queue;
773 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
776 if (dev->flags & ATA_DFLAG_NCQ) {
779 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
780 depth = min(ATA_MAX_QUEUE - 1, depth);
781 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
786 * ata_scsi_slave_config - Set SCSI device attributes
787 * @sdev: SCSI device to examine
789 * This is called before we actually start reading
790 * and writing to the device, to configure certain
791 * SCSI mid-layer behaviors.
794 * Defined by SCSI layer. We don't really care.
797 int ata_scsi_slave_config(struct scsi_device *sdev)
799 struct ata_port *ap = ata_shost_to_port(sdev->host);
800 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
802 ata_scsi_sdev_config(sdev);
804 sdev->manage_start_stop = 1;
807 ata_scsi_dev_config(sdev, dev);
809 return 0; /* scsi layer doesn't check return value, sigh */
813 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
814 * @sdev: SCSI device to be destroyed
816 * @sdev is about to be destroyed for hot/warm unplugging. If
817 * this unplugging was initiated by libata as indicated by NULL
818 * dev->sdev, this function doesn't have to do anything.
819 * Otherwise, SCSI layer initiated warm-unplug is in progress.
820 * Clear dev->sdev, schedule the device for ATA detach and invoke
824 * Defined by SCSI layer. We don't really care.
826 void ata_scsi_slave_destroy(struct scsi_device *sdev)
828 struct ata_port *ap = ata_shost_to_port(sdev->host);
830 struct ata_device *dev;
832 if (!ap->ops->error_handler)
835 spin_lock_irqsave(ap->lock, flags);
836 dev = __ata_scsi_find_dev(ap, sdev);
837 if (dev && dev->sdev) {
838 /* SCSI device already in CANCEL state, no need to offline it */
840 dev->flags |= ATA_DFLAG_DETACH;
841 ata_port_schedule_eh(ap);
843 spin_unlock_irqrestore(ap->lock, flags);
847 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
848 * @sdev: SCSI device to configure queue depth for
849 * @queue_depth: new queue depth
851 * This is libata standard hostt->change_queue_depth callback.
852 * SCSI will call into this callback when user tries to set queue
856 * SCSI layer (we don't care)
859 * Newly configured queue depth.
861 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
863 struct ata_port *ap = ata_shost_to_port(sdev->host);
864 struct ata_device *dev;
867 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
868 return sdev->queue_depth;
870 dev = ata_scsi_find_dev(ap, sdev);
871 if (!dev || !ata_dev_enabled(dev))
872 return sdev->queue_depth;
875 spin_lock_irqsave(ap->lock, flags);
876 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
877 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
878 dev->flags |= ATA_DFLAG_NCQ_OFF;
881 spin_unlock_irqrestore(ap->lock, flags);
883 /* limit and apply queue depth */
884 queue_depth = min(queue_depth, sdev->host->can_queue);
885 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
886 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
888 if (sdev->queue_depth == queue_depth)
891 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
895 /* XXX: for spindown warning */
896 static void ata_delayed_done_timerfn(unsigned long arg)
898 struct scsi_cmnd *scmd = (void *)arg;
900 scmd->scsi_done(scmd);
903 /* XXX: for spindown warning */
904 static void ata_delayed_done(struct scsi_cmnd *scmd)
906 static struct timer_list timer;
908 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
909 mod_timer(&timer, jiffies + 5 * HZ);
913 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
914 * @qc: Storage for translated ATA taskfile
916 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
917 * (to start). Perhaps these commands should be preceded by
918 * CHECK POWER MODE to see what power mode the device is already in.
919 * [See SAT revision 5 at www.t10.org]
922 * spin_lock_irqsave(host lock)
925 * Zero on success, non-zero on error.
927 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
929 struct scsi_cmnd *scmd = qc->scsicmd;
930 struct ata_taskfile *tf = &qc->tf;
931 const u8 *cdb = scmd->cmnd;
933 if (scmd->cmd_len < 5)
936 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
937 tf->protocol = ATA_PROT_NODATA;
939 ; /* ignore IMMED bit, violates sat-r05 */
942 goto invalid_fld; /* LOEJ bit set not supported */
943 if (((cdb[4] >> 4) & 0xf) != 0)
944 goto invalid_fld; /* power conditions not supported */
946 if (qc->dev->horkage & ATA_HORKAGE_SKIP_PM) {
947 /* the device lacks PM support, finish without doing anything */
948 scmd->result = SAM_STAT_GOOD;
953 tf->nsect = 1; /* 1 sector, lba=0 */
955 if (qc->dev->flags & ATA_DFLAG_LBA) {
956 tf->flags |= ATA_TFLAG_LBA;
961 tf->device |= ATA_LBA;
964 tf->lbal = 0x1; /* sect */
965 tf->lbam = 0x0; /* cyl low */
966 tf->lbah = 0x0; /* cyl high */
969 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
971 /* XXX: This is for backward compatibility, will be
972 * removed. Read Documentation/feature-removal-schedule.txt
975 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
976 (system_state == SYSTEM_HALT ||
977 system_state == SYSTEM_POWER_OFF)) {
978 static unsigned long warned = 0;
980 if (!test_and_set_bit(0, &warned)) {
981 ata_dev_printk(qc->dev, KERN_WARNING,
982 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
983 "UPDATE SHUTDOWN UTILITY\n");
984 ata_dev_printk(qc->dev, KERN_WARNING,
985 "For more info, visit "
986 "http://linux-ata.org/shutdown.html\n");
988 /* ->scsi_done is not used, use it for
989 * delayed completion.
991 scmd->scsi_done = qc->scsidone;
992 qc->scsidone = ata_delayed_done;
994 scmd->result = SAM_STAT_GOOD;
998 /* Issue ATA STANDBY IMMEDIATE command */
999 tf->command = ATA_CMD_STANDBYNOW1;
1003 * Standby and Idle condition timers could be implemented but that
1004 * would require libata to implement the Power condition mode page
1005 * and allow the user to change it. Changing mode pages requires
1006 * MODE SELECT to be implemented.
1012 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1013 /* "Invalid field in cbd" */
1019 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1020 * @qc: Storage for translated ATA taskfile
1022 * Sets up an ATA taskfile to issue FLUSH CACHE or
1026 * spin_lock_irqsave(host lock)
1029 * Zero on success, non-zero on error.
1031 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1033 struct ata_taskfile *tf = &qc->tf;
1035 tf->flags |= ATA_TFLAG_DEVICE;
1036 tf->protocol = ATA_PROT_NODATA;
1038 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1039 tf->command = ATA_CMD_FLUSH_EXT;
1041 tf->command = ATA_CMD_FLUSH;
1047 * scsi_6_lba_len - Get LBA and transfer length
1048 * @cdb: SCSI command to translate
1050 * Calculate LBA and transfer length for 6-byte commands.
1054 * @plen: the transfer length
1056 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1061 VPRINTK("six-byte command\n");
1063 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1064 lba |= ((u64)cdb[2]) << 8;
1065 lba |= ((u64)cdb[3]);
1074 * scsi_10_lba_len - Get LBA and transfer length
1075 * @cdb: SCSI command to translate
1077 * Calculate LBA and transfer length for 10-byte commands.
1081 * @plen: the transfer length
1083 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1088 VPRINTK("ten-byte command\n");
1090 lba |= ((u64)cdb[2]) << 24;
1091 lba |= ((u64)cdb[3]) << 16;
1092 lba |= ((u64)cdb[4]) << 8;
1093 lba |= ((u64)cdb[5]);
1095 len |= ((u32)cdb[7]) << 8;
1096 len |= ((u32)cdb[8]);
1103 * scsi_16_lba_len - Get LBA and transfer length
1104 * @cdb: SCSI command to translate
1106 * Calculate LBA and transfer length for 16-byte commands.
1110 * @plen: the transfer length
1112 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1117 VPRINTK("sixteen-byte command\n");
1119 lba |= ((u64)cdb[2]) << 56;
1120 lba |= ((u64)cdb[3]) << 48;
1121 lba |= ((u64)cdb[4]) << 40;
1122 lba |= ((u64)cdb[5]) << 32;
1123 lba |= ((u64)cdb[6]) << 24;
1124 lba |= ((u64)cdb[7]) << 16;
1125 lba |= ((u64)cdb[8]) << 8;
1126 lba |= ((u64)cdb[9]);
1128 len |= ((u32)cdb[10]) << 24;
1129 len |= ((u32)cdb[11]) << 16;
1130 len |= ((u32)cdb[12]) << 8;
1131 len |= ((u32)cdb[13]);
1138 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1139 * @qc: Storage for translated ATA taskfile
1141 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1144 * spin_lock_irqsave(host lock)
1147 * Zero on success, non-zero on error.
1149 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1151 struct scsi_cmnd *scmd = qc->scsicmd;
1152 struct ata_taskfile *tf = &qc->tf;
1153 struct ata_device *dev = qc->dev;
1154 u64 dev_sectors = qc->dev->n_sectors;
1155 const u8 *cdb = scmd->cmnd;
1159 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1160 tf->protocol = ATA_PROT_NODATA;
1162 if (cdb[0] == VERIFY) {
1163 if (scmd->cmd_len < 10)
1165 scsi_10_lba_len(cdb, &block, &n_block);
1166 } else if (cdb[0] == VERIFY_16) {
1167 if (scmd->cmd_len < 16)
1169 scsi_16_lba_len(cdb, &block, &n_block);
1175 if (block >= dev_sectors)
1177 if ((block + n_block) > dev_sectors)
1180 if (dev->flags & ATA_DFLAG_LBA) {
1181 tf->flags |= ATA_TFLAG_LBA;
1183 if (lba_28_ok(block, n_block)) {
1185 tf->command = ATA_CMD_VERIFY;
1186 tf->device |= (block >> 24) & 0xf;
1187 } else if (lba_48_ok(block, n_block)) {
1188 if (!(dev->flags & ATA_DFLAG_LBA48))
1192 tf->flags |= ATA_TFLAG_LBA48;
1193 tf->command = ATA_CMD_VERIFY_EXT;
1195 tf->hob_nsect = (n_block >> 8) & 0xff;
1197 tf->hob_lbah = (block >> 40) & 0xff;
1198 tf->hob_lbam = (block >> 32) & 0xff;
1199 tf->hob_lbal = (block >> 24) & 0xff;
1201 /* request too large even for LBA48 */
1204 tf->nsect = n_block & 0xff;
1206 tf->lbah = (block >> 16) & 0xff;
1207 tf->lbam = (block >> 8) & 0xff;
1208 tf->lbal = block & 0xff;
1210 tf->device |= ATA_LBA;
1213 u32 sect, head, cyl, track;
1215 if (!lba_28_ok(block, n_block))
1218 /* Convert LBA to CHS */
1219 track = (u32)block / dev->sectors;
1220 cyl = track / dev->heads;
1221 head = track % dev->heads;
1222 sect = (u32)block % dev->sectors + 1;
1224 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1225 (u32)block, track, cyl, head, sect);
1227 /* Check whether the converted CHS can fit.
1231 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1234 tf->command = ATA_CMD_VERIFY;
1235 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1238 tf->lbah = cyl >> 8;
1245 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1246 /* "Invalid field in cbd" */
1250 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1251 /* "Logical Block Address out of range" */
1255 scmd->result = SAM_STAT_GOOD;
1260 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1261 * @qc: Storage for translated ATA taskfile
1263 * Converts any of six SCSI read/write commands into the
1264 * ATA counterpart, including starting sector (LBA),
1265 * sector count, and taking into account the device's LBA48
1268 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1269 * %WRITE_16 are currently supported.
1272 * spin_lock_irqsave(host lock)
1275 * Zero on success, non-zero on error.
1277 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1279 struct scsi_cmnd *scmd = qc->scsicmd;
1280 const u8 *cdb = scmd->cmnd;
1281 unsigned int tf_flags = 0;
1286 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1287 tf_flags |= ATA_TFLAG_WRITE;
1289 /* Calculate the SCSI LBA, transfer length and FUA. */
1293 if (unlikely(scmd->cmd_len < 10))
1295 scsi_10_lba_len(cdb, &block, &n_block);
1296 if (unlikely(cdb[1] & (1 << 3)))
1297 tf_flags |= ATA_TFLAG_FUA;
1301 if (unlikely(scmd->cmd_len < 6))
1303 scsi_6_lba_len(cdb, &block, &n_block);
1305 /* for 6-byte r/w commands, transfer length 0
1306 * means 256 blocks of data, not 0 block.
1313 if (unlikely(scmd->cmd_len < 16))
1315 scsi_16_lba_len(cdb, &block, &n_block);
1316 if (unlikely(cdb[1] & (1 << 3)))
1317 tf_flags |= ATA_TFLAG_FUA;
1320 DPRINTK("no-byte command\n");
1324 /* Check and compose ATA command */
1326 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1327 * length 0 means transfer 0 block of data.
1328 * However, for ATA R/W commands, sector count 0 means
1329 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1331 * WARNING: one or two older ATA drives treat 0 as 0...
1335 qc->flags |= ATA_QCFLAG_IO;
1336 qc->nbytes = n_block * ATA_SECT_SIZE;
1338 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1340 if (likely(rc == 0))
1345 /* treat all other errors as -EINVAL, fall through */
1347 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1348 /* "Invalid field in cbd" */
1352 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1353 /* "Logical Block Address out of range" */
1357 scmd->result = SAM_STAT_GOOD;
1361 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1363 struct ata_port *ap = qc->ap;
1364 struct ata_eh_info *ehi = &qc->dev->link->eh_info;
1365 struct scsi_cmnd *cmd = qc->scsicmd;
1366 u8 *cdb = cmd->cmnd;
1367 int need_sense = (qc->err_mask != 0);
1369 /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and
1370 * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
1373 if (ap->ops->error_handler && !need_sense) {
1374 switch (qc->tf.command) {
1375 case ATA_CMD_SET_FEATURES:
1376 if ((qc->tf.feature == SETFEATURES_WC_ON) ||
1377 (qc->tf.feature == SETFEATURES_WC_OFF)) {
1378 ehi->action |= ATA_EH_REVALIDATE;
1379 ata_port_schedule_eh(ap);
1383 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
1384 case ATA_CMD_SET_MULTI: /* multi_count changed */
1385 ehi->action |= ATA_EH_REVALIDATE;
1386 ata_port_schedule_eh(ap);
1391 /* For ATA pass thru (SAT) commands, generate a sense block if
1392 * user mandated it or if there's an error. Note that if we
1393 * generate because the user forced us to, a check condition
1394 * is generated and the ATA register values are returned
1395 * whether the command completed successfully or not. If there
1396 * was no error, SK, ASC and ASCQ will all be zero.
1398 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1399 ((cdb[2] & 0x20) || need_sense)) {
1400 ata_gen_passthru_sense(qc);
1403 cmd->result = SAM_STAT_GOOD;
1405 /* TODO: decide which descriptor format to use
1406 * for 48b LBA devices and call that here
1407 * instead of the fixed desc, which is only
1408 * good for smaller LBA (and maybe CHS?)
1411 ata_gen_ata_sense(qc);
1415 /* XXX: track spindown state for spindown skipping and warning */
1416 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1417 qc->tf.command == ATA_CMD_STANDBYNOW1))
1418 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1419 else if (likely(system_state != SYSTEM_HALT &&
1420 system_state != SYSTEM_POWER_OFF))
1421 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1423 if (need_sense && !ap->ops->error_handler)
1424 ata_dump_status(ap->print_id, &qc->result_tf);
1432 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1433 * @dev: ATA device to which the command is addressed
1434 * @cmd: SCSI command to execute
1435 * @done: SCSI command completion function
1436 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1438 * Our ->queuecommand() function has decided that the SCSI
1439 * command issued can be directly translated into an ATA
1440 * command, rather than handled internally.
1442 * This function sets up an ata_queued_cmd structure for the
1443 * SCSI command, and sends that ata_queued_cmd to the hardware.
1445 * The xlat_func argument (actor) returns 0 if ready to execute
1446 * ATA command, else 1 to finish translation. If 1 is returned
1447 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1448 * to be set reflecting an error condition or clean (early)
1452 * spin_lock_irqsave(host lock)
1455 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1456 * needs to be deferred.
1458 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1459 void (*done)(struct scsi_cmnd *),
1460 ata_xlat_func_t xlat_func)
1462 struct ata_port *ap = dev->link->ap;
1463 struct ata_queued_cmd *qc;
1468 qc = ata_scsi_qc_new(dev, cmd, done);
1472 /* data is present; dma-map it */
1473 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1474 cmd->sc_data_direction == DMA_TO_DEVICE) {
1475 if (unlikely(scsi_bufflen(cmd) < 1)) {
1476 ata_dev_printk(dev, KERN_WARNING,
1477 "WARNING: zero len r/w req\n");
1481 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1483 qc->dma_dir = cmd->sc_data_direction;
1486 qc->complete_fn = ata_scsi_qc_complete;
1491 if (ap->ops->qc_defer) {
1492 if ((rc = ap->ops->qc_defer(qc)))
1496 /* select device, send command to hardware */
1505 DPRINTK("EXIT - early finish (good or error)\n");
1510 cmd->result = (DID_ERROR << 16);
1513 DPRINTK("EXIT - internal\n");
1518 DPRINTK("EXIT - defer\n");
1519 if (rc == ATA_DEFER_LINK)
1520 return SCSI_MLQUEUE_DEVICE_BUSY;
1522 return SCSI_MLQUEUE_HOST_BUSY;
1526 * ata_scsi_rbuf_get - Map response buffer.
1527 * @cmd: SCSI command containing buffer to be mapped.
1528 * @buf_out: Pointer to mapped area.
1530 * Maps buffer contained within SCSI command @cmd.
1533 * spin_lock_irqsave(host lock)
1536 * Length of response buffer.
1539 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1542 unsigned int buflen;
1544 struct scatterlist *sg = scsi_sglist(cmd);
1547 buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
1548 buflen = sg->length;
1559 * ata_scsi_rbuf_put - Unmap response buffer.
1560 * @cmd: SCSI command containing buffer to be unmapped.
1561 * @buf: buffer to unmap
1563 * Unmaps response buffer contained within @cmd.
1566 * spin_lock_irqsave(host lock)
1569 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1571 struct scatterlist *sg = scsi_sglist(cmd);
1573 kunmap_atomic(buf - sg->offset, KM_IRQ0);
1577 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1578 * @args: device IDENTIFY data / SCSI command of interest.
1579 * @actor: Callback hook for desired SCSI command simulator
1581 * Takes care of the hard work of simulating a SCSI command...
1582 * Mapping the response buffer, calling the command's handler,
1583 * and handling the handler's return value. This return value
1584 * indicates whether the handler wishes the SCSI command to be
1585 * completed successfully (0), or not (in which case cmd->result
1586 * and sense buffer are assumed to be set).
1589 * spin_lock_irqsave(host lock)
1592 void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1593 unsigned int (*actor) (struct ata_scsi_args *args,
1594 u8 *rbuf, unsigned int buflen))
1597 unsigned int buflen, rc;
1598 struct scsi_cmnd *cmd = args->cmd;
1600 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1601 memset(rbuf, 0, buflen);
1602 rc = actor(args, rbuf, buflen);
1603 ata_scsi_rbuf_put(cmd, rbuf);
1606 cmd->result = SAM_STAT_GOOD;
1611 * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer
1612 * @idx: byte index into SCSI response buffer
1613 * @val: value to set
1615 * To be used by SCSI command simulator functions. This macros
1616 * expects two local variables, u8 *rbuf and unsigned int buflen,
1622 #define ATA_SCSI_RBUF_SET(idx, val) do { \
1623 if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \
1627 * ata_scsiop_inq_std - Simulate INQUIRY command
1628 * @args: device IDENTIFY data / SCSI command of interest.
1629 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1630 * @buflen: Response buffer length.
1632 * Returns standard device identification data associated
1633 * with non-VPD INQUIRY command output.
1636 * spin_lock_irqsave(host lock)
1639 unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1640 unsigned int buflen)
1645 0x5, /* claim SPC-3 version compatibility */
1650 /* set scsi removeable (RMB) bit per ata bit */
1651 if (ata_id_removeable(args->id))
1656 memcpy(rbuf, hdr, sizeof(hdr));
1659 memcpy(&rbuf[8], "ATA ", 8);
1660 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1661 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1662 if (rbuf[32] == 0 || rbuf[32] == ' ')
1663 memcpy(&rbuf[32], "n/a ", 4);
1667 const u8 versions[] = {
1668 0x60, /* SAM-3 (no version claimed) */
1671 0x20, /* SBC-2 (no version claimed) */
1674 0x60 /* SPC-3 (no version claimed) */
1677 memcpy(rbuf + 59, versions, sizeof(versions));
1684 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1685 * @args: device IDENTIFY data / SCSI command of interest.
1686 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1687 * @buflen: Response buffer length.
1689 * Returns list of inquiry VPD pages available.
1692 * spin_lock_irqsave(host lock)
1695 unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1696 unsigned int buflen)
1698 const u8 pages[] = {
1699 0x00, /* page 0x00, this page */
1700 0x80, /* page 0x80, unit serial no page */
1701 0x83 /* page 0x83, device ident page */
1703 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1706 memcpy(rbuf + 4, pages, sizeof(pages));
1712 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1713 * @args: device IDENTIFY data / SCSI command of interest.
1714 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1715 * @buflen: Response buffer length.
1717 * Returns ATA device serial number.
1720 * spin_lock_irqsave(host lock)
1723 unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1724 unsigned int buflen)
1728 0x80, /* this page code */
1730 ATA_ID_SERNO_LEN, /* page len */
1732 memcpy(rbuf, hdr, sizeof(hdr));
1734 if (buflen > (ATA_ID_SERNO_LEN + 4 - 1))
1735 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1736 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1742 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1743 * @args: device IDENTIFY data / SCSI command of interest.
1744 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1745 * @buflen: Response buffer length.
1747 * Yields two logical unit device identification designators:
1748 * - vendor specific ASCII containing the ATA serial number
1749 * - SAT defined "t10 vendor id based" containing ASCII vendor
1750 * name ("ATA "), model and serial numbers.
1753 * spin_lock_irqsave(host lock)
1756 unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1757 unsigned int buflen)
1760 const int sat_model_serial_desc_len = 68;
1762 rbuf[1] = 0x83; /* this page code */
1765 if (buflen > (ATA_ID_SERNO_LEN + num + 3)) {
1766 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1768 rbuf[num + 3] = ATA_ID_SERNO_LEN;
1770 ata_id_string(args->id, (unsigned char *) rbuf + num,
1771 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1772 num += ATA_ID_SERNO_LEN;
1774 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1775 /* SAT defined lu model and serial numbers descriptor */
1776 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1779 rbuf[num + 3] = sat_model_serial_desc_len;
1781 memcpy(rbuf + num, "ATA ", 8);
1783 ata_id_string(args->id, (unsigned char *) rbuf + num,
1784 ATA_ID_PROD, ATA_ID_PROD_LEN);
1785 num += ATA_ID_PROD_LEN;
1786 ata_id_string(args->id, (unsigned char *) rbuf + num,
1787 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1788 num += ATA_ID_SERNO_LEN;
1790 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1795 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
1796 * @args: device IDENTIFY data / SCSI command of interest.
1797 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1798 * @buflen: Response buffer length.
1800 * Yields SAT-specified ATA VPD page.
1803 * spin_lock_irqsave(host lock)
1806 unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf,
1807 unsigned int buflen)
1810 struct ata_taskfile tf;
1816 memset(&pbuf, 0, sizeof(pbuf));
1817 memset(&tf, 0, sizeof(tf));
1819 pbuf[1] = 0x89; /* our page code */
1820 pbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
1821 pbuf[3] = (0x238 & 0xff);
1823 memcpy(&pbuf[8], "linux ", 8);
1824 memcpy(&pbuf[16], "libata ", 16);
1825 memcpy(&pbuf[32], DRV_VERSION, 4);
1826 ata_id_string(args->id, &pbuf[32], ATA_ID_FW_REV, 4);
1828 /* we don't store the ATA device signature, so we fake it */
1830 tf.command = ATA_DRDY; /* really, this is Status reg */
1834 ata_tf_to_fis(&tf, 0, 1, &pbuf[36]); /* TODO: PMP? */
1835 pbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
1837 pbuf[56] = ATA_CMD_ID_ATA;
1839 i = min(buflen, 60U);
1840 memcpy(rbuf, &pbuf[0], i);
1846 memcpy(&rbuf[60], &args->id[0], min(buflen, 512U));
1851 * ata_scsiop_noop - Command handler that simply returns success.
1852 * @args: device IDENTIFY data / SCSI command of interest.
1853 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1854 * @buflen: Response buffer length.
1856 * No operation. Simply returns success to caller, to indicate
1857 * that the caller should successfully complete this SCSI command.
1860 * spin_lock_irqsave(host lock)
1863 unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1864 unsigned int buflen)
1871 * ata_msense_push - Push data onto MODE SENSE data output buffer
1872 * @ptr_io: (input/output) Location to store more output data
1873 * @last: End of output data buffer
1874 * @buf: Pointer to BLOB being added to output buffer
1875 * @buflen: Length of BLOB
1877 * Store MODE SENSE data on an output buffer.
1883 static void ata_msense_push(u8 **ptr_io, const u8 *last,
1884 const u8 *buf, unsigned int buflen)
1888 if ((ptr + buflen - 1) > last)
1891 memcpy(ptr, buf, buflen);
1899 * ata_msense_caching - Simulate MODE SENSE caching info page
1900 * @id: device IDENTIFY data
1901 * @ptr_io: (input/output) Location to store more output data
1902 * @last: End of output data buffer
1904 * Generate a caching info page, which conditionally indicates
1905 * write caching to the SCSI layer, depending on device
1912 static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1915 u8 page[CACHE_MPAGE_LEN];
1917 memcpy(page, def_cache_mpage, sizeof(page));
1918 if (ata_id_wcache_enabled(id))
1919 page[2] |= (1 << 2); /* write cache enable */
1920 if (!ata_id_rahead_enabled(id))
1921 page[12] |= (1 << 5); /* disable read ahead */
1923 ata_msense_push(ptr_io, last, page, sizeof(page));
1924 return sizeof(page);
1928 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1929 * @dev: Device associated with this MODE SENSE command
1930 * @ptr_io: (input/output) Location to store more output data
1931 * @last: End of output data buffer
1933 * Generate a generic MODE SENSE control mode page.
1939 static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1941 ata_msense_push(ptr_io, last, def_control_mpage,
1942 sizeof(def_control_mpage));
1943 return sizeof(def_control_mpage);
1947 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1948 * @dev: Device associated with this MODE SENSE command
1949 * @ptr_io: (input/output) Location to store more output data
1950 * @last: End of output data buffer
1952 * Generate a generic MODE SENSE r/w error recovery page.
1958 static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1961 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1962 sizeof(def_rw_recovery_mpage));
1963 return sizeof(def_rw_recovery_mpage);
1967 * We can turn this into a real blacklist if it's needed, for now just
1968 * blacklist any Maxtor BANC1G10 revision firmware
1970 static int ata_dev_supports_fua(u16 *id)
1972 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
1976 if (!ata_id_has_fua(id))
1979 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
1980 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
1982 if (strcmp(model, "Maxtor"))
1984 if (strcmp(fw, "BANC1G10"))
1987 return 0; /* blacklisted */
1991 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1992 * @args: device IDENTIFY data / SCSI command of interest.
1993 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1994 * @buflen: Response buffer length.
1996 * Simulate MODE SENSE commands. Assume this is invoked for direct
1997 * access devices (e.g. disks) only. There should be no block
1998 * descriptor for other device types.
2001 * spin_lock_irqsave(host lock)
2004 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
2005 unsigned int buflen)
2007 struct ata_device *dev = args->dev;
2008 u8 *scsicmd = args->cmd->cmnd, *p, *last;
2009 const u8 sat_blk_desc[] = {
2010 0, 0, 0, 0, /* number of blocks: sat unspecified */
2012 0, 0x2, 0x0 /* block length: 512 bytes */
2015 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
2020 six_byte = (scsicmd[0] == MODE_SENSE);
2021 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2023 * LLBA bit in msense(10) ignored (compliant)
2026 page_control = scsicmd[2] >> 6;
2027 switch (page_control) {
2028 case 0: /* current */
2029 break; /* supported */
2031 goto saving_not_supp;
2032 case 1: /* changeable */
2033 case 2: /* defaults */
2039 output_len = 4 + (ebd ? 8 : 0);
2040 alloc_len = scsicmd[4];
2042 output_len = 8 + (ebd ? 8 : 0);
2043 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2045 minlen = (alloc_len < buflen) ? alloc_len : buflen;
2047 p = rbuf + output_len;
2048 last = rbuf + minlen - 1;
2050 pg = scsicmd[2] & 0x3f;
2053 * No mode subpages supported (yet) but asking for _all_
2054 * subpages may be valid
2056 if (spg && (spg != ALL_SUB_MPAGES))
2060 case RW_RECOVERY_MPAGE:
2061 output_len += ata_msense_rw_recovery(&p, last);
2065 output_len += ata_msense_caching(args->id, &p, last);
2068 case CONTROL_MPAGE: {
2069 output_len += ata_msense_ctl_mode(&p, last);
2074 output_len += ata_msense_rw_recovery(&p, last);
2075 output_len += ata_msense_caching(args->id, &p, last);
2076 output_len += ata_msense_ctl_mode(&p, last);
2079 default: /* invalid page code */
2087 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2088 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2093 rbuf[0] = output_len;
2098 rbuf[3] = sizeof(sat_blk_desc);
2100 memcpy(rbuf + 4, sat_blk_desc,
2101 sizeof(sat_blk_desc));
2105 rbuf[0] = output_len >> 8;
2107 rbuf[1] = output_len;
2112 rbuf[7] = sizeof(sat_blk_desc);
2114 memcpy(rbuf + 8, sat_blk_desc,
2115 sizeof(sat_blk_desc));
2121 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2122 /* "Invalid field in cbd" */
2126 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2127 /* "Saving parameters not supported" */
2132 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2133 * @args: device IDENTIFY data / SCSI command of interest.
2134 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2135 * @buflen: Response buffer length.
2137 * Simulate READ CAPACITY commands.
2142 unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2143 unsigned int buflen)
2145 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
2149 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2150 if (last_lba >= 0xffffffffULL)
2151 last_lba = 0xffffffff;
2153 /* sector count, 32-bit */
2154 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3));
2155 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2));
2156 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1));
2157 ATA_SCSI_RBUF_SET(3, last_lba);
2160 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8);
2161 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE);
2163 /* sector count, 64-bit */
2164 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7));
2165 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6));
2166 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5));
2167 ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4));
2168 ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3));
2169 ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2));
2170 ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1));
2171 ATA_SCSI_RBUF_SET(7, last_lba);
2174 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8);
2175 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE);
2182 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2183 * @args: device IDENTIFY data / SCSI command of interest.
2184 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2185 * @buflen: Response buffer length.
2187 * Simulate REPORT LUNS command.
2190 * spin_lock_irqsave(host lock)
2193 unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2194 unsigned int buflen)
2197 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2203 * ata_scsi_set_sense - Set SCSI sense data and status
2204 * @cmd: SCSI request to be handled
2205 * @sk: SCSI-defined sense key
2206 * @asc: SCSI-defined additional sense code
2207 * @ascq: SCSI-defined additional sense code qualifier
2209 * Helper function that builds a valid fixed format, current
2210 * response code and the given sense key (sk), additional sense
2211 * code (asc) and additional sense code qualifier (ascq) with
2212 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2213 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2219 void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2221 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2223 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2224 cmd->sense_buffer[2] = sk;
2225 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2226 cmd->sense_buffer[12] = asc;
2227 cmd->sense_buffer[13] = ascq;
2231 * ata_scsi_badcmd - End a SCSI request with an error
2232 * @cmd: SCSI request to be handled
2233 * @done: SCSI command completion function
2234 * @asc: SCSI-defined additional sense code
2235 * @ascq: SCSI-defined additional sense code qualifier
2237 * Helper function that completes a SCSI command with
2238 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2239 * and the specified additional sense codes.
2242 * spin_lock_irqsave(host lock)
2245 void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2248 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
2253 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2255 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2256 /* FIXME: not quite right; we don't want the
2257 * translation of taskfile registers into
2258 * a sense descriptors, since that's only
2259 * correct for ATA, not ATAPI
2261 ata_gen_passthru_sense(qc);
2264 qc->scsidone(qc->scsicmd);
2268 /* is it pointless to prefer PIO for "safety reasons"? */
2269 static inline int ata_pio_use_silly(struct ata_port *ap)
2271 return (ap->flags & ATA_FLAG_PIO_DMA);
2274 static void atapi_request_sense(struct ata_queued_cmd *qc)
2276 struct ata_port *ap = qc->ap;
2277 struct scsi_cmnd *cmd = qc->scsicmd;
2279 DPRINTK("ATAPI request sense\n");
2281 /* FIXME: is this needed? */
2282 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2284 ap->ops->tf_read(ap, &qc->tf);
2286 /* fill these in, for the case where they are -not- overwritten */
2287 cmd->sense_buffer[0] = 0x70;
2288 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2292 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2293 qc->dma_dir = DMA_FROM_DEVICE;
2295 memset(&qc->cdb, 0, qc->dev->cdb_len);
2296 qc->cdb[0] = REQUEST_SENSE;
2297 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2299 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2300 qc->tf.command = ATA_CMD_PACKET;
2302 if (ata_pio_use_silly(ap)) {
2303 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2304 qc->tf.feature |= ATAPI_PKT_DMA;
2306 qc->tf.protocol = ATA_PROT_ATAPI;
2307 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2310 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2312 qc->complete_fn = atapi_sense_complete;
2319 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2321 struct scsi_cmnd *cmd = qc->scsicmd;
2322 unsigned int err_mask = qc->err_mask;
2324 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2326 /* handle completion from new EH */
2327 if (unlikely(qc->ap->ops->error_handler &&
2328 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2330 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2331 /* FIXME: not quite right; we don't want the
2332 * translation of taskfile registers into a
2333 * sense descriptors, since that's only
2334 * correct for ATA, not ATAPI
2336 ata_gen_passthru_sense(qc);
2339 /* SCSI EH automatically locks door if sdev->locked is
2340 * set. Sometimes door lock request continues to
2341 * fail, for example, when no media is present. This
2342 * creates a loop - SCSI EH issues door lock which
2343 * fails and gets invoked again to acquire sense data
2344 * for the failed command.
2346 * If door lock fails, always clear sdev->locked to
2347 * avoid this infinite loop.
2349 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2350 qc->dev->sdev->locked = 0;
2352 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2358 /* successful completion or old EH failure path */
2359 if (unlikely(err_mask & AC_ERR_DEV)) {
2360 cmd->result = SAM_STAT_CHECK_CONDITION;
2361 atapi_request_sense(qc);
2363 } else if (unlikely(err_mask)) {
2364 /* FIXME: not quite right; we don't want the
2365 * translation of taskfile registers into
2366 * a sense descriptors, since that's only
2367 * correct for ATA, not ATAPI
2369 ata_gen_passthru_sense(qc);
2371 u8 *scsicmd = cmd->cmnd;
2373 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2375 unsigned int buflen;
2377 buflen = ata_scsi_rbuf_get(cmd, &buf);
2379 /* ATAPI devices typically report zero for their SCSI version,
2380 * and sometimes deviate from the spec WRT response data
2381 * format. If SCSI version is reported as zero like normal,
2382 * then we make the following fixups: 1) Fake MMC-5 version,
2383 * to indicate to the Linux scsi midlayer this is a modern
2384 * device. 2) Ensure response data format / ATAPI information
2385 * are always correct.
2392 ata_scsi_rbuf_put(cmd, buf);
2395 cmd->result = SAM_STAT_GOOD;
2402 * atapi_xlat - Initialize PACKET taskfile
2403 * @qc: command structure to be initialized
2406 * spin_lock_irqsave(host lock)
2409 * Zero on success, non-zero on failure.
2411 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2413 struct scsi_cmnd *scmd = qc->scsicmd;
2414 struct ata_device *dev = qc->dev;
2415 int using_pio = (dev->flags & ATA_DFLAG_PIO);
2416 int nodata = (scmd->sc_data_direction == DMA_NONE);
2417 unsigned int nbytes;
2419 memset(qc->cdb, 0, dev->cdb_len);
2420 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2422 qc->complete_fn = atapi_qc_complete;
2424 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2425 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2426 qc->tf.flags |= ATA_TFLAG_WRITE;
2427 DPRINTK("direction: write\n");
2430 qc->tf.command = ATA_CMD_PACKET;
2431 qc->nbytes = scsi_bufflen(scmd);
2433 /* check whether ATAPI DMA is safe */
2434 if (!using_pio && ata_check_atapi_dma(qc))
2437 /* Some controller variants snoop this value for Packet transfers
2438 to do state machine and FIFO management. Thus we want to set it
2439 properly, and for DMA where it is effectively meaningless */
2440 nbytes = min(qc->nbytes, (unsigned int)63 * 1024);
2442 qc->tf.lbam = (nbytes & 0xFF);
2443 qc->tf.lbah = (nbytes >> 8);
2445 if (using_pio || nodata) {
2446 /* no data, or PIO data xfer */
2448 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2450 qc->tf.protocol = ATA_PROT_ATAPI;
2453 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2454 qc->tf.feature |= ATAPI_PKT_DMA;
2456 if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE))
2457 /* some SATA bridges need us to indicate data xfer direction */
2458 qc->tf.feature |= ATAPI_DMADIR;
2462 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2463 as ATAPI tape drives don't get this right otherwise */
2467 static struct ata_device * ata_find_dev(struct ata_port *ap, int devno)
2469 if (ap->nr_pmp_links == 0) {
2470 if (likely(devno < ata_link_max_devices(&ap->link)))
2471 return &ap->link.device[devno];
2473 if (likely(devno < ap->nr_pmp_links))
2474 return &ap->pmp_link[devno].device[0];
2480 static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
2481 const struct scsi_device *scsidev)
2485 /* skip commands not addressed to targets we simulate */
2486 if (ap->nr_pmp_links == 0) {
2487 if (unlikely(scsidev->channel || scsidev->lun))
2489 devno = scsidev->id;
2491 if (unlikely(scsidev->id || scsidev->lun))
2493 devno = scsidev->channel;
2496 return ata_find_dev(ap, devno);
2500 * ata_scsi_dev_enabled - determine if device is enabled
2503 * Determine if commands should be sent to the specified device.
2506 * spin_lock_irqsave(host lock)
2509 * 0 if commands are not allowed / 1 if commands are allowed
2512 static int ata_scsi_dev_enabled(struct ata_device *dev)
2514 if (unlikely(!ata_dev_enabled(dev)))
2517 if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) {
2518 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2519 ata_dev_printk(dev, KERN_WARNING,
2520 "WARNING: ATAPI is %s, device ignored.\n",
2521 atapi_enabled ? "not supported with this driver" : "disabled");
2530 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2531 * @ap: ATA port to which the device is attached
2532 * @scsidev: SCSI device from which we derive the ATA device
2534 * Given various information provided in struct scsi_cmnd,
2535 * map that onto an ATA bus, and using that mapping
2536 * determine which ata_device is associated with the
2537 * SCSI command to be sent.
2540 * spin_lock_irqsave(host lock)
2543 * Associated ATA device, or %NULL if not found.
2545 static struct ata_device *
2546 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2548 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2550 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
2557 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2558 * @byte1: Byte 1 from pass-thru CDB.
2561 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2564 ata_scsi_map_proto(u8 byte1)
2566 switch((byte1 & 0x1e) >> 1) {
2567 case 3: /* Non-data */
2568 return ATA_PROT_NODATA;
2571 case 10: /* UDMA Data-in */
2572 case 11: /* UDMA Data-Out */
2573 return ATA_PROT_DMA;
2575 case 4: /* PIO Data-in */
2576 case 5: /* PIO Data-out */
2577 return ATA_PROT_PIO;
2579 case 0: /* Hard Reset */
2581 case 8: /* Device Diagnostic */
2582 case 9: /* Device Reset */
2583 case 7: /* DMA Queued */
2584 case 12: /* FPDMA */
2585 case 15: /* Return Response Info */
2586 default: /* Reserved */
2590 return ATA_PROT_UNKNOWN;
2594 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2595 * @qc: command structure to be initialized
2597 * Handles either 12 or 16-byte versions of the CDB.
2600 * Zero on success, non-zero on failure.
2602 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2604 struct ata_taskfile *tf = &(qc->tf);
2605 struct scsi_cmnd *scmd = qc->scsicmd;
2606 struct ata_device *dev = qc->dev;
2607 const u8 *cdb = scmd->cmnd;
2609 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2612 /* We may not issue DMA commands if no DMA mode is set */
2613 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2617 * 12 and 16 byte CDBs use different offsets to
2618 * provide the various register values.
2620 if (cdb[0] == ATA_16) {
2622 * 16-byte CDB - may contain extended commands.
2624 * If that is the case, copy the upper byte register values.
2626 if (cdb[1] & 0x01) {
2627 tf->hob_feature = cdb[3];
2628 tf->hob_nsect = cdb[5];
2629 tf->hob_lbal = cdb[7];
2630 tf->hob_lbam = cdb[9];
2631 tf->hob_lbah = cdb[11];
2632 tf->flags |= ATA_TFLAG_LBA48;
2634 tf->flags &= ~ATA_TFLAG_LBA48;
2637 * Always copy low byte, device and command registers.
2639 tf->feature = cdb[4];
2644 tf->device = cdb[13];
2645 tf->command = cdb[14];
2648 * 12-byte CDB - incapable of extended commands.
2650 tf->flags &= ~ATA_TFLAG_LBA48;
2652 tf->feature = cdb[3];
2657 tf->device = cdb[8];
2658 tf->command = cdb[9];
2661 /* enforce correct master/slave bit */
2662 tf->device = dev->devno ?
2663 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2665 /* sanity check for pio multi commands */
2666 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2669 if (is_multi_taskfile(tf)) {
2670 unsigned int multi_count = 1 << (cdb[1] >> 5);
2672 /* compare the passed through multi_count
2673 * with the cached multi_count of libata
2675 if (multi_count != dev->multi_count)
2676 ata_dev_printk(dev, KERN_WARNING,
2677 "invalid multi_count %u ignored\n",
2681 /* READ/WRITE LONG use a non-standard sect_size */
2682 qc->sect_size = ATA_SECT_SIZE;
2683 switch (tf->command) {
2684 case ATA_CMD_READ_LONG:
2685 case ATA_CMD_READ_LONG_ONCE:
2686 case ATA_CMD_WRITE_LONG:
2687 case ATA_CMD_WRITE_LONG_ONCE:
2688 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2690 qc->sect_size = scsi_bufflen(scmd);
2694 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2695 * SET_FEATURES - XFER MODE must be preceded/succeeded
2696 * by an update to hardware-specific registers for each
2697 * controller (i.e. the reason for ->set_piomode(),
2698 * ->set_dmamode(), and ->post_set_mode() hooks).
2700 if ((tf->command == ATA_CMD_SET_FEATURES)
2701 && (tf->feature == SETFEATURES_XFER))
2705 * Set flags so that all registers will be written,
2706 * and pass on write indication (used for PIO/DMA
2709 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2711 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2712 tf->flags |= ATA_TFLAG_WRITE;
2715 * Set transfer length.
2717 * TODO: find out if we need to do more here to
2718 * cover scatter/gather case.
2720 qc->nbytes = scsi_bufflen(scmd);
2722 /* request result TF */
2723 qc->flags |= ATA_QCFLAG_RESULT_TF;
2728 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
2729 /* "Invalid field in cdb" */
2734 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2736 * @cmd: SCSI command opcode to consider
2738 * Look up the SCSI command given, and determine whether the
2739 * SCSI command is to be translated or simulated.
2742 * Pointer to translation function if possible, %NULL if not.
2745 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2755 return ata_scsi_rw_xlat;
2757 case SYNCHRONIZE_CACHE:
2758 if (ata_try_flush_cache(dev))
2759 return ata_scsi_flush_xlat;
2764 return ata_scsi_verify_xlat;
2768 return ata_scsi_pass_thru;
2771 return ata_scsi_start_stop_xlat;
2778 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2779 * @ap: ATA port to which the command was being sent
2780 * @cmd: SCSI command to dump
2782 * Prints the contents of a SCSI command via printk().
2785 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2786 struct scsi_cmnd *cmd)
2789 struct scsi_device *scsidev = cmd->device;
2790 u8 *scsicmd = cmd->cmnd;
2792 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2794 scsidev->channel, scsidev->id, scsidev->lun,
2795 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2796 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2801 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2802 void (*done)(struct scsi_cmnd *),
2803 struct ata_device *dev)
2805 u8 scsi_op = scmd->cmnd[0];
2806 ata_xlat_func_t xlat_func;
2809 if (dev->class == ATA_DEV_ATA) {
2810 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2813 xlat_func = ata_get_xlat_func(dev, scsi_op);
2815 if (unlikely(!scmd->cmd_len))
2819 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2820 /* relay SCSI command to ATAPI device */
2821 if (unlikely(scmd->cmd_len > dev->cdb_len))
2824 xlat_func = atapi_xlat;
2826 /* ATA_16 passthru, treat as an ATA command */
2827 if (unlikely(scmd->cmd_len > 16))
2830 xlat_func = ata_get_xlat_func(dev, scsi_op);
2835 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
2837 ata_scsi_simulate(dev, scmd, done);
2842 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
2843 scmd->cmd_len, scsi_op, dev->cdb_len);
2844 scmd->result = DID_ERROR << 16;
2850 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2851 * @cmd: SCSI command to be sent
2852 * @done: Completion function, called when command is complete
2854 * In some cases, this function translates SCSI commands into
2855 * ATA taskfiles, and queues the taskfiles to be sent to
2856 * hardware. In other cases, this function simulates a
2857 * SCSI device by evaluating and responding to certain
2858 * SCSI commands. This creates the overall effect of
2859 * ATA and ATAPI devices appearing as SCSI devices.
2862 * Releases scsi-layer-held lock, and obtains host lock.
2865 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2868 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2870 struct ata_port *ap;
2871 struct ata_device *dev;
2872 struct scsi_device *scsidev = cmd->device;
2873 struct Scsi_Host *shost = scsidev->host;
2876 ap = ata_shost_to_port(shost);
2878 spin_unlock(shost->host_lock);
2879 spin_lock(ap->lock);
2881 ata_scsi_dump_cdb(ap, cmd);
2883 dev = ata_scsi_find_dev(ap, scsidev);
2885 rc = __ata_scsi_queuecmd(cmd, done, dev);
2887 cmd->result = (DID_BAD_TARGET << 16);
2891 spin_unlock(ap->lock);
2892 spin_lock(shost->host_lock);
2897 * ata_scsi_simulate - simulate SCSI command on ATA device
2898 * @dev: the target device
2899 * @cmd: SCSI command being sent to device.
2900 * @done: SCSI command completion function.
2902 * Interprets and directly executes a select list of SCSI commands
2903 * that can be handled internally.
2906 * spin_lock_irqsave(host lock)
2909 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
2910 void (*done)(struct scsi_cmnd *))
2912 struct ata_scsi_args args;
2913 const u8 *scsicmd = cmd->cmnd;
2921 switch(scsicmd[0]) {
2922 /* TODO: worth improving? */
2924 ata_scsi_invalid_field(cmd, done);
2928 if (scsicmd[1] & 2) /* is CmdDt set? */
2929 ata_scsi_invalid_field(cmd, done);
2930 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2931 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2932 else switch (scsicmd[2]) {
2934 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2937 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2940 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2943 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
2946 ata_scsi_invalid_field(cmd, done);
2953 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2956 case MODE_SELECT: /* unconditionally return */
2957 case MODE_SELECT_10: /* bad-field-in-cdb */
2958 ata_scsi_invalid_field(cmd, done);
2962 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2965 case SERVICE_ACTION_IN:
2966 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2967 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2969 ata_scsi_invalid_field(cmd, done);
2973 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2977 ata_scsi_set_sense(cmd, 0, 0, 0);
2978 cmd->result = (DRIVER_SENSE << 24);
2982 /* if we reach this, then writeback caching is disabled,
2983 * turning this into a no-op.
2985 case SYNCHRONIZE_CACHE:
2988 /* no-op's, complete with success */
2992 case TEST_UNIT_READY:
2993 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2996 case SEND_DIAGNOSTIC:
2997 tmp8 = scsicmd[1] & ~(1 << 3);
2998 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
2999 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3001 ata_scsi_invalid_field(cmd, done);
3004 /* all other commands */
3006 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3007 /* "Invalid command operation code" */
3013 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3017 for (i = 0; i < host->n_ports; i++) {
3018 struct ata_port *ap = host->ports[i];
3019 struct Scsi_Host *shost;
3022 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3026 *(struct ata_port **)&shost->hostdata[0] = ap;
3027 ap->scsi_host = shost;
3029 shost->transportt = &ata_scsi_transport_template;
3030 shost->unique_id = ap->print_id;
3033 shost->max_channel = 1;
3034 shost->max_cmd_len = 16;
3036 /* Schedule policy is determined by ->qc_defer()
3037 * callback and it needs to see every deferred qc.
3038 * Set host_blocked to 1 to prevent SCSI midlayer from
3039 * automatically deferring requests.
3041 shost->max_host_blocked = 1;
3043 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3051 scsi_host_put(host->ports[i]->scsi_host);
3054 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3056 scsi_remove_host(shost);
3057 scsi_host_put(shost);
3062 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3065 struct ata_device *last_failed_dev = NULL;
3066 struct ata_link *link;
3067 struct ata_device *dev;
3069 if (ap->flags & ATA_FLAG_DISABLED)
3073 ata_port_for_each_link(link, ap) {
3074 ata_link_for_each_dev(dev, link) {
3075 struct scsi_device *sdev;
3076 int channel = 0, id = 0;
3078 if (!ata_dev_enabled(dev) || dev->sdev)
3081 if (ata_is_host_link(link))
3084 channel = link->pmp;
3086 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3088 if (!IS_ERR(sdev)) {
3090 scsi_device_put(sdev);
3095 /* If we scanned while EH was in progress or allocation
3096 * failure occurred, scan would have failed silently. Check
3097 * whether all devices are attached.
3099 ata_port_for_each_link(link, ap) {
3100 ata_link_for_each_dev(dev, link) {
3101 if (ata_dev_enabled(dev) && !dev->sdev)
3109 /* we're missing some SCSI devices */
3111 /* If caller requested synchrnous scan && we've made
3112 * any progress, sleep briefly and repeat.
3114 if (dev != last_failed_dev) {
3116 last_failed_dev = dev;
3120 /* We might be failing to detect boot device, give it
3121 * a few more chances.
3128 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3129 "failed without making any progress,\n"
3130 " switching to async\n");
3133 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3134 round_jiffies_relative(HZ));
3138 * ata_scsi_offline_dev - offline attached SCSI device
3139 * @dev: ATA device to offline attached SCSI device for
3141 * This function is called from ata_eh_hotplug() and responsible
3142 * for taking the SCSI device attached to @dev offline. This
3143 * function is called with host lock which protects dev->sdev
3147 * spin_lock_irqsave(host lock)
3150 * 1 if attached SCSI device exists, 0 otherwise.
3152 int ata_scsi_offline_dev(struct ata_device *dev)
3155 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3162 * ata_scsi_remove_dev - remove attached SCSI device
3163 * @dev: ATA device to remove attached SCSI device for
3165 * This function is called from ata_eh_scsi_hotplug() and
3166 * responsible for removing the SCSI device attached to @dev.
3169 * Kernel thread context (may sleep).
3171 static void ata_scsi_remove_dev(struct ata_device *dev)
3173 struct ata_port *ap = dev->link->ap;
3174 struct scsi_device *sdev;
3175 unsigned long flags;
3177 /* Alas, we need to grab scan_mutex to ensure SCSI device
3178 * state doesn't change underneath us and thus
3179 * scsi_device_get() always succeeds. The mutex locking can
3180 * be removed if there is __scsi_device_get() interface which
3181 * increments reference counts regardless of device state.
3183 mutex_lock(&ap->scsi_host->scan_mutex);
3184 spin_lock_irqsave(ap->lock, flags);
3186 /* clearing dev->sdev is protected by host lock */
3191 /* If user initiated unplug races with us, sdev can go
3192 * away underneath us after the host lock and
3193 * scan_mutex are released. Hold onto it.
3195 if (scsi_device_get(sdev) == 0) {
3196 /* The following ensures the attached sdev is
3197 * offline on return from ata_scsi_offline_dev()
3198 * regardless it wins or loses the race
3199 * against this function.
3201 scsi_device_set_state(sdev, SDEV_OFFLINE);
3208 spin_unlock_irqrestore(ap->lock, flags);
3209 mutex_unlock(&ap->scsi_host->scan_mutex);
3212 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3213 sdev->sdev_gendev.bus_id);
3215 scsi_remove_device(sdev);
3216 scsi_device_put(sdev);
3220 static void ata_scsi_handle_link_detach(struct ata_link *link)
3222 struct ata_port *ap = link->ap;
3223 struct ata_device *dev;
3225 ata_link_for_each_dev(dev, link) {
3226 unsigned long flags;
3228 if (!(dev->flags & ATA_DFLAG_DETACHED))
3231 spin_lock_irqsave(ap->lock, flags);
3232 dev->flags &= ~ATA_DFLAG_DETACHED;
3233 spin_unlock_irqrestore(ap->lock, flags);
3235 ata_scsi_remove_dev(dev);
3240 * ata_scsi_media_change_notify - send media change event
3241 * @dev: Pointer to the disk device with media change event
3243 * Tell the block layer to send a media change notification
3247 * spin_lock_irqsave(host lock)
3249 void ata_scsi_media_change_notify(struct ata_device *dev)
3251 #ifdef OTHER_AN_PATCHES_HAVE_BEEN_APPLIED
3253 scsi_device_event_notify(dev->sdev, SDEV_MEDIA_CHANGE);
3258 * ata_scsi_hotplug - SCSI part of hotplug
3259 * @work: Pointer to ATA port to perform SCSI hotplug on
3261 * Perform SCSI part of hotplug. It's executed from a separate
3262 * workqueue after EH completes. This is necessary because SCSI
3263 * hot plugging requires working EH and hot unplugging is
3264 * synchronized with hot plugging with a mutex.
3267 * Kernel thread context (may sleep).
3269 void ata_scsi_hotplug(struct work_struct *work)
3271 struct ata_port *ap =
3272 container_of(work, struct ata_port, hotplug_task.work);
3275 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3276 DPRINTK("ENTER/EXIT - unloading\n");
3282 /* Unplug detached devices. We cannot use link iterator here
3283 * because PMP links have to be scanned even if PMP is
3284 * currently not attached. Iterate manually.
3286 ata_scsi_handle_link_detach(&ap->link);
3288 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3289 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3291 /* scan for new ones */
3292 ata_scsi_scan_host(ap, 0);
3298 * ata_scsi_user_scan - indication for user-initiated bus scan
3299 * @shost: SCSI host to scan
3300 * @channel: Channel to scan
3304 * This function is called when user explicitly requests bus
3305 * scan. Set probe pending flag and invoke EH.
3308 * SCSI layer (we don't care)
3313 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3314 unsigned int id, unsigned int lun)
3316 struct ata_port *ap = ata_shost_to_port(shost);
3317 unsigned long flags;
3320 if (!ap->ops->error_handler)
3323 if (lun != SCAN_WILD_CARD && lun)
3326 if (ap->nr_pmp_links == 0) {
3327 if (channel != SCAN_WILD_CARD && channel)
3331 if (id != SCAN_WILD_CARD && id)
3336 spin_lock_irqsave(ap->lock, flags);
3338 if (devno == SCAN_WILD_CARD) {
3339 struct ata_link *link;
3341 ata_port_for_each_link(link, ap) {
3342 struct ata_eh_info *ehi = &link->eh_info;
3343 ehi->probe_mask |= (1 << ata_link_max_devices(link)) - 1;
3344 ehi->action |= ATA_EH_SOFTRESET;
3347 struct ata_device *dev = ata_find_dev(ap, devno);
3350 struct ata_eh_info *ehi = &dev->link->eh_info;
3351 ehi->probe_mask |= 1 << dev->devno;
3352 ehi->action |= ATA_EH_SOFTRESET;
3353 ehi->flags |= ATA_EHI_RESUME_LINK;
3359 ata_port_schedule_eh(ap);
3360 spin_unlock_irqrestore(ap->lock, flags);
3361 ata_port_wait_eh(ap);
3363 spin_unlock_irqrestore(ap->lock, flags);
3369 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3370 * @work: Pointer to ATA port to perform scsi_rescan_device()
3372 * After ATA pass thru (SAT) commands are executed successfully,
3373 * libata need to propagate the changes to SCSI layer. This
3374 * function must be executed from ata_aux_wq such that sdev
3375 * attach/detach don't race with rescan.
3378 * Kernel thread context (may sleep).
3380 void ata_scsi_dev_rescan(struct work_struct *work)
3382 struct ata_port *ap =
3383 container_of(work, struct ata_port, scsi_rescan_task);
3384 struct ata_link *link;
3385 struct ata_device *dev;
3386 unsigned long flags;
3388 spin_lock_irqsave(ap->lock, flags);
3390 ata_port_for_each_link(link, ap) {
3391 ata_link_for_each_dev(dev, link) {
3392 struct scsi_device *sdev = dev->sdev;
3394 if (!ata_dev_enabled(dev) || !sdev)
3396 if (scsi_device_get(sdev))
3399 spin_unlock_irqrestore(ap->lock, flags);
3400 scsi_rescan_device(&(sdev->sdev_gendev));
3401 scsi_device_put(sdev);
3402 spin_lock_irqsave(ap->lock, flags);
3406 spin_unlock_irqrestore(ap->lock, flags);
3410 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3411 * @host: ATA host container for all SAS ports
3412 * @port_info: Information from low-level host driver
3413 * @shost: SCSI host that the scsi device is attached to
3416 * PCI/etc. bus probe sem.
3419 * ata_port pointer on success / NULL on failure.
3422 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3423 struct ata_port_info *port_info,
3424 struct Scsi_Host *shost)
3426 struct ata_port *ap;
3428 ap = ata_port_alloc(host);
3433 ap->lock = shost->host_lock;
3434 ap->pio_mask = port_info->pio_mask;
3435 ap->mwdma_mask = port_info->mwdma_mask;
3436 ap->udma_mask = port_info->udma_mask;
3437 ap->flags |= port_info->flags;
3438 ap->ops = port_info->port_ops;
3439 ap->cbl = ATA_CBL_SATA;
3443 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3446 * ata_sas_port_start - Set port up for dma.
3447 * @ap: Port to initialize
3449 * Called just after data structures for each port are
3450 * initialized. Allocates DMA pad.
3452 * May be used as the port_start() entry in ata_port_operations.
3455 * Inherited from caller.
3457 int ata_sas_port_start(struct ata_port *ap)
3459 return ata_pad_alloc(ap, ap->dev);
3461 EXPORT_SYMBOL_GPL(ata_sas_port_start);
3464 * ata_port_stop - Undo ata_sas_port_start()
3465 * @ap: Port to shut down
3467 * Frees the DMA pad.
3469 * May be used as the port_stop() entry in ata_port_operations.
3472 * Inherited from caller.
3475 void ata_sas_port_stop(struct ata_port *ap)
3477 ata_pad_free(ap, ap->dev);
3479 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3482 * ata_sas_port_init - Initialize a SATA device
3483 * @ap: SATA port to initialize
3486 * PCI/etc. bus probe sem.
3489 * Zero on success, non-zero on error.
3492 int ata_sas_port_init(struct ata_port *ap)
3494 int rc = ap->ops->port_start(ap);
3497 ap->print_id = ata_print_id++;
3498 rc = ata_bus_probe(ap);
3503 EXPORT_SYMBOL_GPL(ata_sas_port_init);
3506 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3507 * @ap: SATA port to destroy
3511 void ata_sas_port_destroy(struct ata_port *ap)
3513 if (ap->ops->port_stop)
3514 ap->ops->port_stop(ap);
3517 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3520 * ata_sas_slave_configure - Default slave_config routine for libata devices
3521 * @sdev: SCSI device to configure
3522 * @ap: ATA port to which SCSI device is attached
3528 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3530 ata_scsi_sdev_config(sdev);
3531 ata_scsi_dev_config(sdev, ap->link.device);
3534 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3537 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3538 * @cmd: SCSI command to be sent
3539 * @done: Completion function, called when command is complete
3540 * @ap: ATA port to which the command is being sent
3543 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3547 int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3548 struct ata_port *ap)
3552 ata_scsi_dump_cdb(ap, cmd);
3554 if (likely(ata_scsi_dev_enabled(ap->link.device)))
3555 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
3557 cmd->result = (DID_BAD_TARGET << 16);
3562 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);