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 blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
806 sdev->manage_start_stop = 1;
809 ata_scsi_dev_config(sdev, dev);
811 return 0; /* scsi layer doesn't check return value, sigh */
815 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
816 * @sdev: SCSI device to be destroyed
818 * @sdev is about to be destroyed for hot/warm unplugging. If
819 * this unplugging was initiated by libata as indicated by NULL
820 * dev->sdev, this function doesn't have to do anything.
821 * Otherwise, SCSI layer initiated warm-unplug is in progress.
822 * Clear dev->sdev, schedule the device for ATA detach and invoke
826 * Defined by SCSI layer. We don't really care.
828 void ata_scsi_slave_destroy(struct scsi_device *sdev)
830 struct ata_port *ap = ata_shost_to_port(sdev->host);
832 struct ata_device *dev;
834 if (!ap->ops->error_handler)
837 spin_lock_irqsave(ap->lock, flags);
838 dev = __ata_scsi_find_dev(ap, sdev);
839 if (dev && dev->sdev) {
840 /* SCSI device already in CANCEL state, no need to offline it */
842 dev->flags |= ATA_DFLAG_DETACH;
843 ata_port_schedule_eh(ap);
845 spin_unlock_irqrestore(ap->lock, flags);
849 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
850 * @sdev: SCSI device to configure queue depth for
851 * @queue_depth: new queue depth
853 * This is libata standard hostt->change_queue_depth callback.
854 * SCSI will call into this callback when user tries to set queue
858 * SCSI layer (we don't care)
861 * Newly configured queue depth.
863 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
865 struct ata_port *ap = ata_shost_to_port(sdev->host);
866 struct ata_device *dev;
869 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
870 return sdev->queue_depth;
872 dev = ata_scsi_find_dev(ap, sdev);
873 if (!dev || !ata_dev_enabled(dev))
874 return sdev->queue_depth;
877 spin_lock_irqsave(ap->lock, flags);
878 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
879 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
880 dev->flags |= ATA_DFLAG_NCQ_OFF;
883 spin_unlock_irqrestore(ap->lock, flags);
885 /* limit and apply queue depth */
886 queue_depth = min(queue_depth, sdev->host->can_queue);
887 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
888 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
890 if (sdev->queue_depth == queue_depth)
893 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
897 /* XXX: for spindown warning */
898 static void ata_delayed_done_timerfn(unsigned long arg)
900 struct scsi_cmnd *scmd = (void *)arg;
902 scmd->scsi_done(scmd);
905 /* XXX: for spindown warning */
906 static void ata_delayed_done(struct scsi_cmnd *scmd)
908 static struct timer_list timer;
910 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
911 mod_timer(&timer, jiffies + 5 * HZ);
915 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
916 * @qc: Storage for translated ATA taskfile
918 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
919 * (to start). Perhaps these commands should be preceded by
920 * CHECK POWER MODE to see what power mode the device is already in.
921 * [See SAT revision 5 at www.t10.org]
924 * spin_lock_irqsave(host lock)
927 * Zero on success, non-zero on error.
929 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
931 struct scsi_cmnd *scmd = qc->scsicmd;
932 struct ata_taskfile *tf = &qc->tf;
933 const u8 *cdb = scmd->cmnd;
935 if (scmd->cmd_len < 5)
938 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
939 tf->protocol = ATA_PROT_NODATA;
941 ; /* ignore IMMED bit, violates sat-r05 */
944 goto invalid_fld; /* LOEJ bit set not supported */
945 if (((cdb[4] >> 4) & 0xf) != 0)
946 goto invalid_fld; /* power conditions not supported */
948 tf->nsect = 1; /* 1 sector, lba=0 */
950 if (qc->dev->flags & ATA_DFLAG_LBA) {
951 tf->flags |= ATA_TFLAG_LBA;
956 tf->device |= ATA_LBA;
959 tf->lbal = 0x1; /* sect */
960 tf->lbam = 0x0; /* cyl low */
961 tf->lbah = 0x0; /* cyl high */
964 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
966 /* XXX: This is for backward compatibility, will be
967 * removed. Read Documentation/feature-removal-schedule.txt
970 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
971 (system_state == SYSTEM_HALT ||
972 system_state == SYSTEM_POWER_OFF)) {
973 static unsigned long warned = 0;
975 if (!test_and_set_bit(0, &warned)) {
976 ata_dev_printk(qc->dev, KERN_WARNING,
977 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
978 "UPDATE SHUTDOWN UTILITY\n");
979 ata_dev_printk(qc->dev, KERN_WARNING,
980 "For more info, visit "
981 "http://linux-ata.org/shutdown.html\n");
983 /* ->scsi_done is not used, use it for
984 * delayed completion.
986 scmd->scsi_done = qc->scsidone;
987 qc->scsidone = ata_delayed_done;
989 scmd->result = SAM_STAT_GOOD;
993 /* Issue ATA STANDBY IMMEDIATE command */
994 tf->command = ATA_CMD_STANDBYNOW1;
998 * Standby and Idle condition timers could be implemented but that
999 * would require libata to implement the Power condition mode page
1000 * and allow the user to change it. Changing mode pages requires
1001 * MODE SELECT to be implemented.
1007 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1008 /* "Invalid field in cbd" */
1014 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1015 * @qc: Storage for translated ATA taskfile
1017 * Sets up an ATA taskfile to issue FLUSH CACHE or
1021 * spin_lock_irqsave(host lock)
1024 * Zero on success, non-zero on error.
1026 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1028 struct ata_taskfile *tf = &qc->tf;
1030 tf->flags |= ATA_TFLAG_DEVICE;
1031 tf->protocol = ATA_PROT_NODATA;
1033 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1034 tf->command = ATA_CMD_FLUSH_EXT;
1036 tf->command = ATA_CMD_FLUSH;
1042 * scsi_6_lba_len - Get LBA and transfer length
1043 * @cdb: SCSI command to translate
1045 * Calculate LBA and transfer length for 6-byte commands.
1049 * @plen: the transfer length
1051 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1056 VPRINTK("six-byte command\n");
1058 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1059 lba |= ((u64)cdb[2]) << 8;
1060 lba |= ((u64)cdb[3]);
1069 * scsi_10_lba_len - Get LBA and transfer length
1070 * @cdb: SCSI command to translate
1072 * Calculate LBA and transfer length for 10-byte commands.
1076 * @plen: the transfer length
1078 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1083 VPRINTK("ten-byte command\n");
1085 lba |= ((u64)cdb[2]) << 24;
1086 lba |= ((u64)cdb[3]) << 16;
1087 lba |= ((u64)cdb[4]) << 8;
1088 lba |= ((u64)cdb[5]);
1090 len |= ((u32)cdb[7]) << 8;
1091 len |= ((u32)cdb[8]);
1098 * scsi_16_lba_len - Get LBA and transfer length
1099 * @cdb: SCSI command to translate
1101 * Calculate LBA and transfer length for 16-byte commands.
1105 * @plen: the transfer length
1107 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1112 VPRINTK("sixteen-byte command\n");
1114 lba |= ((u64)cdb[2]) << 56;
1115 lba |= ((u64)cdb[3]) << 48;
1116 lba |= ((u64)cdb[4]) << 40;
1117 lba |= ((u64)cdb[5]) << 32;
1118 lba |= ((u64)cdb[6]) << 24;
1119 lba |= ((u64)cdb[7]) << 16;
1120 lba |= ((u64)cdb[8]) << 8;
1121 lba |= ((u64)cdb[9]);
1123 len |= ((u32)cdb[10]) << 24;
1124 len |= ((u32)cdb[11]) << 16;
1125 len |= ((u32)cdb[12]) << 8;
1126 len |= ((u32)cdb[13]);
1133 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1134 * @qc: Storage for translated ATA taskfile
1136 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1139 * spin_lock_irqsave(host lock)
1142 * Zero on success, non-zero on error.
1144 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1146 struct scsi_cmnd *scmd = qc->scsicmd;
1147 struct ata_taskfile *tf = &qc->tf;
1148 struct ata_device *dev = qc->dev;
1149 u64 dev_sectors = qc->dev->n_sectors;
1150 const u8 *cdb = scmd->cmnd;
1154 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1155 tf->protocol = ATA_PROT_NODATA;
1157 if (cdb[0] == VERIFY) {
1158 if (scmd->cmd_len < 10)
1160 scsi_10_lba_len(cdb, &block, &n_block);
1161 } else if (cdb[0] == VERIFY_16) {
1162 if (scmd->cmd_len < 16)
1164 scsi_16_lba_len(cdb, &block, &n_block);
1170 if (block >= dev_sectors)
1172 if ((block + n_block) > dev_sectors)
1175 if (dev->flags & ATA_DFLAG_LBA) {
1176 tf->flags |= ATA_TFLAG_LBA;
1178 if (lba_28_ok(block, n_block)) {
1180 tf->command = ATA_CMD_VERIFY;
1181 tf->device |= (block >> 24) & 0xf;
1182 } else if (lba_48_ok(block, n_block)) {
1183 if (!(dev->flags & ATA_DFLAG_LBA48))
1187 tf->flags |= ATA_TFLAG_LBA48;
1188 tf->command = ATA_CMD_VERIFY_EXT;
1190 tf->hob_nsect = (n_block >> 8) & 0xff;
1192 tf->hob_lbah = (block >> 40) & 0xff;
1193 tf->hob_lbam = (block >> 32) & 0xff;
1194 tf->hob_lbal = (block >> 24) & 0xff;
1196 /* request too large even for LBA48 */
1199 tf->nsect = n_block & 0xff;
1201 tf->lbah = (block >> 16) & 0xff;
1202 tf->lbam = (block >> 8) & 0xff;
1203 tf->lbal = block & 0xff;
1205 tf->device |= ATA_LBA;
1208 u32 sect, head, cyl, track;
1210 if (!lba_28_ok(block, n_block))
1213 /* Convert LBA to CHS */
1214 track = (u32)block / dev->sectors;
1215 cyl = track / dev->heads;
1216 head = track % dev->heads;
1217 sect = (u32)block % dev->sectors + 1;
1219 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1220 (u32)block, track, cyl, head, sect);
1222 /* Check whether the converted CHS can fit.
1226 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1229 tf->command = ATA_CMD_VERIFY;
1230 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1233 tf->lbah = cyl >> 8;
1240 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1241 /* "Invalid field in cbd" */
1245 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1246 /* "Logical Block Address out of range" */
1250 scmd->result = SAM_STAT_GOOD;
1255 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1256 * @qc: Storage for translated ATA taskfile
1258 * Converts any of six SCSI read/write commands into the
1259 * ATA counterpart, including starting sector (LBA),
1260 * sector count, and taking into account the device's LBA48
1263 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1264 * %WRITE_16 are currently supported.
1267 * spin_lock_irqsave(host lock)
1270 * Zero on success, non-zero on error.
1272 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1274 struct scsi_cmnd *scmd = qc->scsicmd;
1275 const u8 *cdb = scmd->cmnd;
1276 unsigned int tf_flags = 0;
1281 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1282 tf_flags |= ATA_TFLAG_WRITE;
1284 /* Calculate the SCSI LBA, transfer length and FUA. */
1288 if (unlikely(scmd->cmd_len < 10))
1290 scsi_10_lba_len(cdb, &block, &n_block);
1291 if (unlikely(cdb[1] & (1 << 3)))
1292 tf_flags |= ATA_TFLAG_FUA;
1296 if (unlikely(scmd->cmd_len < 6))
1298 scsi_6_lba_len(cdb, &block, &n_block);
1300 /* for 6-byte r/w commands, transfer length 0
1301 * means 256 blocks of data, not 0 block.
1308 if (unlikely(scmd->cmd_len < 16))
1310 scsi_16_lba_len(cdb, &block, &n_block);
1311 if (unlikely(cdb[1] & (1 << 3)))
1312 tf_flags |= ATA_TFLAG_FUA;
1315 DPRINTK("no-byte command\n");
1319 /* Check and compose ATA command */
1321 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1322 * length 0 means transfer 0 block of data.
1323 * However, for ATA R/W commands, sector count 0 means
1324 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1326 * WARNING: one or two older ATA drives treat 0 as 0...
1330 qc->flags |= ATA_QCFLAG_IO;
1331 qc->nbytes = n_block * ATA_SECT_SIZE;
1333 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1335 if (likely(rc == 0))
1340 /* treat all other errors as -EINVAL, fall through */
1342 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1343 /* "Invalid field in cbd" */
1347 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1348 /* "Logical Block Address out of range" */
1352 scmd->result = SAM_STAT_GOOD;
1356 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1358 struct ata_port *ap = qc->ap;
1359 struct scsi_cmnd *cmd = qc->scsicmd;
1360 u8 *cdb = cmd->cmnd;
1361 int need_sense = (qc->err_mask != 0);
1363 /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and
1364 * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
1367 if (ap->ops->error_handler && !need_sense) {
1368 switch (qc->tf.command) {
1369 case ATA_CMD_SET_FEATURES:
1370 if ((qc->tf.feature == SETFEATURES_WC_ON) ||
1371 (qc->tf.feature == SETFEATURES_WC_OFF)) {
1372 ap->link.eh_info.action |= ATA_EH_REVALIDATE;
1373 ata_port_schedule_eh(ap);
1377 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
1378 case ATA_CMD_SET_MULTI: /* multi_count changed */
1379 ap->link.eh_info.action |= ATA_EH_REVALIDATE;
1380 ata_port_schedule_eh(ap);
1385 /* For ATA pass thru (SAT) commands, generate a sense block if
1386 * user mandated it or if there's an error. Note that if we
1387 * generate because the user forced us to, a check condition
1388 * is generated and the ATA register values are returned
1389 * whether the command completed successfully or not. If there
1390 * was no error, SK, ASC and ASCQ will all be zero.
1392 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1393 ((cdb[2] & 0x20) || need_sense)) {
1394 ata_gen_passthru_sense(qc);
1397 cmd->result = SAM_STAT_GOOD;
1399 /* TODO: decide which descriptor format to use
1400 * for 48b LBA devices and call that here
1401 * instead of the fixed desc, which is only
1402 * good for smaller LBA (and maybe CHS?)
1405 ata_gen_ata_sense(qc);
1409 /* XXX: track spindown state for spindown skipping and warning */
1410 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1411 qc->tf.command == ATA_CMD_STANDBYNOW1))
1412 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1413 else if (likely(system_state != SYSTEM_HALT &&
1414 system_state != SYSTEM_POWER_OFF))
1415 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1417 if (need_sense && !ap->ops->error_handler)
1418 ata_dump_status(ap->print_id, &qc->result_tf);
1426 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1427 * @dev: ATA device to which the command is addressed
1428 * @cmd: SCSI command to execute
1429 * @done: SCSI command completion function
1430 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1432 * Our ->queuecommand() function has decided that the SCSI
1433 * command issued can be directly translated into an ATA
1434 * command, rather than handled internally.
1436 * This function sets up an ata_queued_cmd structure for the
1437 * SCSI command, and sends that ata_queued_cmd to the hardware.
1439 * The xlat_func argument (actor) returns 0 if ready to execute
1440 * ATA command, else 1 to finish translation. If 1 is returned
1441 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1442 * to be set reflecting an error condition or clean (early)
1446 * spin_lock_irqsave(host lock)
1449 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1450 * needs to be deferred.
1452 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1453 void (*done)(struct scsi_cmnd *),
1454 ata_xlat_func_t xlat_func)
1456 struct ata_port *ap = dev->link->ap;
1457 struct ata_queued_cmd *qc;
1462 qc = ata_scsi_qc_new(dev, cmd, done);
1466 /* data is present; dma-map it */
1467 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1468 cmd->sc_data_direction == DMA_TO_DEVICE) {
1469 if (unlikely(scsi_bufflen(cmd) < 1)) {
1470 ata_dev_printk(dev, KERN_WARNING,
1471 "WARNING: zero len r/w req\n");
1475 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1477 qc->dma_dir = cmd->sc_data_direction;
1480 qc->complete_fn = ata_scsi_qc_complete;
1485 if (ap->ops->qc_defer) {
1486 if ((rc = ap->ops->qc_defer(qc)))
1490 /* select device, send command to hardware */
1499 DPRINTK("EXIT - early finish (good or error)\n");
1504 cmd->result = (DID_ERROR << 16);
1507 DPRINTK("EXIT - internal\n");
1512 DPRINTK("EXIT - defer\n");
1513 if (rc == ATA_DEFER_LINK)
1514 return SCSI_MLQUEUE_DEVICE_BUSY;
1516 return SCSI_MLQUEUE_HOST_BUSY;
1520 * ata_scsi_rbuf_get - Map response buffer.
1521 * @cmd: SCSI command containing buffer to be mapped.
1522 * @buf_out: Pointer to mapped area.
1524 * Maps buffer contained within SCSI command @cmd.
1527 * spin_lock_irqsave(host lock)
1530 * Length of response buffer.
1533 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1536 unsigned int buflen;
1538 struct scatterlist *sg = scsi_sglist(cmd);
1541 buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
1542 buflen = sg->length;
1553 * ata_scsi_rbuf_put - Unmap response buffer.
1554 * @cmd: SCSI command containing buffer to be unmapped.
1555 * @buf: buffer to unmap
1557 * Unmaps response buffer contained within @cmd.
1560 * spin_lock_irqsave(host lock)
1563 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1565 struct scatterlist *sg = scsi_sglist(cmd);
1567 kunmap_atomic(buf - sg->offset, KM_IRQ0);
1571 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1572 * @args: device IDENTIFY data / SCSI command of interest.
1573 * @actor: Callback hook for desired SCSI command simulator
1575 * Takes care of the hard work of simulating a SCSI command...
1576 * Mapping the response buffer, calling the command's handler,
1577 * and handling the handler's return value. This return value
1578 * indicates whether the handler wishes the SCSI command to be
1579 * completed successfully (0), or not (in which case cmd->result
1580 * and sense buffer are assumed to be set).
1583 * spin_lock_irqsave(host lock)
1586 void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1587 unsigned int (*actor) (struct ata_scsi_args *args,
1588 u8 *rbuf, unsigned int buflen))
1591 unsigned int buflen, rc;
1592 struct scsi_cmnd *cmd = args->cmd;
1594 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1595 memset(rbuf, 0, buflen);
1596 rc = actor(args, rbuf, buflen);
1597 ata_scsi_rbuf_put(cmd, rbuf);
1600 cmd->result = SAM_STAT_GOOD;
1605 * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer
1606 * @idx: byte index into SCSI response buffer
1607 * @val: value to set
1609 * To be used by SCSI command simulator functions. This macros
1610 * expects two local variables, u8 *rbuf and unsigned int buflen,
1616 #define ATA_SCSI_RBUF_SET(idx, val) do { \
1617 if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \
1621 * ata_scsiop_inq_std - Simulate INQUIRY command
1622 * @args: device IDENTIFY data / SCSI command of interest.
1623 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1624 * @buflen: Response buffer length.
1626 * Returns standard device identification data associated
1627 * with non-VPD INQUIRY command output.
1630 * spin_lock_irqsave(host lock)
1633 unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1634 unsigned int buflen)
1639 0x5, /* claim SPC-3 version compatibility */
1644 /* set scsi removeable (RMB) bit per ata bit */
1645 if (ata_id_removeable(args->id))
1650 memcpy(rbuf, hdr, sizeof(hdr));
1653 memcpy(&rbuf[8], "ATA ", 8);
1654 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1655 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1656 if (rbuf[32] == 0 || rbuf[32] == ' ')
1657 memcpy(&rbuf[32], "n/a ", 4);
1661 const u8 versions[] = {
1662 0x60, /* SAM-3 (no version claimed) */
1665 0x20, /* SBC-2 (no version claimed) */
1668 0x60 /* SPC-3 (no version claimed) */
1671 memcpy(rbuf + 59, versions, sizeof(versions));
1678 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
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 list of inquiry VPD pages available.
1686 * spin_lock_irqsave(host lock)
1689 unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1690 unsigned int buflen)
1692 const u8 pages[] = {
1693 0x00, /* page 0x00, this page */
1694 0x80, /* page 0x80, unit serial no page */
1695 0x83 /* page 0x83, device ident page */
1697 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1700 memcpy(rbuf + 4, pages, sizeof(pages));
1706 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1707 * @args: device IDENTIFY data / SCSI command of interest.
1708 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1709 * @buflen: Response buffer length.
1711 * Returns ATA device serial number.
1714 * spin_lock_irqsave(host lock)
1717 unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1718 unsigned int buflen)
1722 0x80, /* this page code */
1724 ATA_ID_SERNO_LEN, /* page len */
1726 memcpy(rbuf, hdr, sizeof(hdr));
1728 if (buflen > (ATA_ID_SERNO_LEN + 4 - 1))
1729 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1730 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1736 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1737 * @args: device IDENTIFY data / SCSI command of interest.
1738 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1739 * @buflen: Response buffer length.
1741 * Yields two logical unit device identification designators:
1742 * - vendor specific ASCII containing the ATA serial number
1743 * - SAT defined "t10 vendor id based" containing ASCII vendor
1744 * name ("ATA "), model and serial numbers.
1747 * spin_lock_irqsave(host lock)
1750 unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1751 unsigned int buflen)
1754 const int sat_model_serial_desc_len = 68;
1756 rbuf[1] = 0x83; /* this page code */
1759 if (buflen > (ATA_ID_SERNO_LEN + num + 3)) {
1760 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1762 rbuf[num + 3] = ATA_ID_SERNO_LEN;
1764 ata_id_string(args->id, (unsigned char *) rbuf + num,
1765 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1766 num += ATA_ID_SERNO_LEN;
1768 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1769 /* SAT defined lu model and serial numbers descriptor */
1770 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1773 rbuf[num + 3] = sat_model_serial_desc_len;
1775 memcpy(rbuf + num, "ATA ", 8);
1777 ata_id_string(args->id, (unsigned char *) rbuf + num,
1778 ATA_ID_PROD, ATA_ID_PROD_LEN);
1779 num += ATA_ID_PROD_LEN;
1780 ata_id_string(args->id, (unsigned char *) rbuf + num,
1781 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1782 num += ATA_ID_SERNO_LEN;
1784 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1789 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
1790 * @args: device IDENTIFY data / SCSI command of interest.
1791 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1792 * @buflen: Response buffer length.
1794 * Yields SAT-specified ATA VPD page.
1797 * spin_lock_irqsave(host lock)
1800 unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf,
1801 unsigned int buflen)
1804 struct ata_taskfile tf;
1810 memset(&pbuf, 0, sizeof(pbuf));
1811 memset(&tf, 0, sizeof(tf));
1813 pbuf[1] = 0x89; /* our page code */
1814 pbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
1815 pbuf[3] = (0x238 & 0xff);
1817 memcpy(&pbuf[8], "linux ", 8);
1818 memcpy(&pbuf[16], "libata ", 16);
1819 memcpy(&pbuf[32], DRV_VERSION, 4);
1820 ata_id_string(args->id, &pbuf[32], ATA_ID_FW_REV, 4);
1822 /* we don't store the ATA device signature, so we fake it */
1824 tf.command = ATA_DRDY; /* really, this is Status reg */
1828 ata_tf_to_fis(&tf, 0, 1, &pbuf[36]); /* TODO: PMP? */
1829 pbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
1831 pbuf[56] = ATA_CMD_ID_ATA;
1833 i = min(buflen, 60U);
1834 memcpy(rbuf, &pbuf[0], i);
1840 memcpy(&rbuf[60], &args->id[0], min(buflen, 512U));
1845 * ata_scsiop_noop - Command handler that simply returns success.
1846 * @args: device IDENTIFY data / SCSI command of interest.
1847 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1848 * @buflen: Response buffer length.
1850 * No operation. Simply returns success to caller, to indicate
1851 * that the caller should successfully complete this SCSI command.
1854 * spin_lock_irqsave(host lock)
1857 unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1858 unsigned int buflen)
1865 * ata_msense_push - Push data onto MODE SENSE data output buffer
1866 * @ptr_io: (input/output) Location to store more output data
1867 * @last: End of output data buffer
1868 * @buf: Pointer to BLOB being added to output buffer
1869 * @buflen: Length of BLOB
1871 * Store MODE SENSE data on an output buffer.
1877 static void ata_msense_push(u8 **ptr_io, const u8 *last,
1878 const u8 *buf, unsigned int buflen)
1882 if ((ptr + buflen - 1) > last)
1885 memcpy(ptr, buf, buflen);
1893 * ata_msense_caching - Simulate MODE SENSE caching info page
1894 * @id: device IDENTIFY data
1895 * @ptr_io: (input/output) Location to store more output data
1896 * @last: End of output data buffer
1898 * Generate a caching info page, which conditionally indicates
1899 * write caching to the SCSI layer, depending on device
1906 static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1909 u8 page[CACHE_MPAGE_LEN];
1911 memcpy(page, def_cache_mpage, sizeof(page));
1912 if (ata_id_wcache_enabled(id))
1913 page[2] |= (1 << 2); /* write cache enable */
1914 if (!ata_id_rahead_enabled(id))
1915 page[12] |= (1 << 5); /* disable read ahead */
1917 ata_msense_push(ptr_io, last, page, sizeof(page));
1918 return sizeof(page);
1922 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1923 * @dev: Device associated with this MODE SENSE command
1924 * @ptr_io: (input/output) Location to store more output data
1925 * @last: End of output data buffer
1927 * Generate a generic MODE SENSE control mode page.
1933 static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1935 ata_msense_push(ptr_io, last, def_control_mpage,
1936 sizeof(def_control_mpage));
1937 return sizeof(def_control_mpage);
1941 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1942 * @dev: Device associated with this MODE SENSE command
1943 * @ptr_io: (input/output) Location to store more output data
1944 * @last: End of output data buffer
1946 * Generate a generic MODE SENSE r/w error recovery page.
1952 static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1955 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1956 sizeof(def_rw_recovery_mpage));
1957 return sizeof(def_rw_recovery_mpage);
1961 * We can turn this into a real blacklist if it's needed, for now just
1962 * blacklist any Maxtor BANC1G10 revision firmware
1964 static int ata_dev_supports_fua(u16 *id)
1966 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
1970 if (!ata_id_has_fua(id))
1973 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
1974 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
1976 if (strcmp(model, "Maxtor"))
1978 if (strcmp(fw, "BANC1G10"))
1981 return 0; /* blacklisted */
1985 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1986 * @args: device IDENTIFY data / SCSI command of interest.
1987 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1988 * @buflen: Response buffer length.
1990 * Simulate MODE SENSE commands. Assume this is invoked for direct
1991 * access devices (e.g. disks) only. There should be no block
1992 * descriptor for other device types.
1995 * spin_lock_irqsave(host lock)
1998 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
1999 unsigned int buflen)
2001 struct ata_device *dev = args->dev;
2002 u8 *scsicmd = args->cmd->cmnd, *p, *last;
2003 const u8 sat_blk_desc[] = {
2004 0, 0, 0, 0, /* number of blocks: sat unspecified */
2006 0, 0x2, 0x0 /* block length: 512 bytes */
2009 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
2014 six_byte = (scsicmd[0] == MODE_SENSE);
2015 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2017 * LLBA bit in msense(10) ignored (compliant)
2020 page_control = scsicmd[2] >> 6;
2021 switch (page_control) {
2022 case 0: /* current */
2023 break; /* supported */
2025 goto saving_not_supp;
2026 case 1: /* changeable */
2027 case 2: /* defaults */
2033 output_len = 4 + (ebd ? 8 : 0);
2034 alloc_len = scsicmd[4];
2036 output_len = 8 + (ebd ? 8 : 0);
2037 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2039 minlen = (alloc_len < buflen) ? alloc_len : buflen;
2041 p = rbuf + output_len;
2042 last = rbuf + minlen - 1;
2044 pg = scsicmd[2] & 0x3f;
2047 * No mode subpages supported (yet) but asking for _all_
2048 * subpages may be valid
2050 if (spg && (spg != ALL_SUB_MPAGES))
2054 case RW_RECOVERY_MPAGE:
2055 output_len += ata_msense_rw_recovery(&p, last);
2059 output_len += ata_msense_caching(args->id, &p, last);
2062 case CONTROL_MPAGE: {
2063 output_len += ata_msense_ctl_mode(&p, last);
2068 output_len += ata_msense_rw_recovery(&p, last);
2069 output_len += ata_msense_caching(args->id, &p, last);
2070 output_len += ata_msense_ctl_mode(&p, last);
2073 default: /* invalid page code */
2081 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2082 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2087 rbuf[0] = output_len;
2092 rbuf[3] = sizeof(sat_blk_desc);
2094 memcpy(rbuf + 4, sat_blk_desc,
2095 sizeof(sat_blk_desc));
2099 rbuf[0] = output_len >> 8;
2101 rbuf[1] = output_len;
2106 rbuf[7] = sizeof(sat_blk_desc);
2108 memcpy(rbuf + 8, sat_blk_desc,
2109 sizeof(sat_blk_desc));
2115 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2116 /* "Invalid field in cbd" */
2120 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2121 /* "Saving parameters not supported" */
2126 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2127 * @args: device IDENTIFY data / SCSI command of interest.
2128 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2129 * @buflen: Response buffer length.
2131 * Simulate READ CAPACITY commands.
2136 unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2137 unsigned int buflen)
2139 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
2143 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2144 if (last_lba >= 0xffffffffULL)
2145 last_lba = 0xffffffff;
2147 /* sector count, 32-bit */
2148 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3));
2149 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2));
2150 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1));
2151 ATA_SCSI_RBUF_SET(3, last_lba);
2154 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8);
2155 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE);
2157 /* sector count, 64-bit */
2158 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7));
2159 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6));
2160 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5));
2161 ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4));
2162 ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3));
2163 ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2));
2164 ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1));
2165 ATA_SCSI_RBUF_SET(7, last_lba);
2168 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8);
2169 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE);
2176 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2177 * @args: device IDENTIFY data / SCSI command of interest.
2178 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2179 * @buflen: Response buffer length.
2181 * Simulate REPORT LUNS command.
2184 * spin_lock_irqsave(host lock)
2187 unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2188 unsigned int buflen)
2191 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2197 * ata_scsi_set_sense - Set SCSI sense data and status
2198 * @cmd: SCSI request to be handled
2199 * @sk: SCSI-defined sense key
2200 * @asc: SCSI-defined additional sense code
2201 * @ascq: SCSI-defined additional sense code qualifier
2203 * Helper function that builds a valid fixed format, current
2204 * response code and the given sense key (sk), additional sense
2205 * code (asc) and additional sense code qualifier (ascq) with
2206 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2207 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2213 void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2215 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2217 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2218 cmd->sense_buffer[2] = sk;
2219 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2220 cmd->sense_buffer[12] = asc;
2221 cmd->sense_buffer[13] = ascq;
2225 * ata_scsi_badcmd - End a SCSI request with an error
2226 * @cmd: SCSI request to be handled
2227 * @done: SCSI command completion function
2228 * @asc: SCSI-defined additional sense code
2229 * @ascq: SCSI-defined additional sense code qualifier
2231 * Helper function that completes a SCSI command with
2232 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2233 * and the specified additional sense codes.
2236 * spin_lock_irqsave(host lock)
2239 void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2242 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
2247 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2249 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2250 /* FIXME: not quite right; we don't want the
2251 * translation of taskfile registers into
2252 * a sense descriptors, since that's only
2253 * correct for ATA, not ATAPI
2255 ata_gen_passthru_sense(qc);
2258 qc->scsidone(qc->scsicmd);
2262 /* is it pointless to prefer PIO for "safety reasons"? */
2263 static inline int ata_pio_use_silly(struct ata_port *ap)
2265 return (ap->flags & ATA_FLAG_PIO_DMA);
2268 static void atapi_request_sense(struct ata_queued_cmd *qc)
2270 struct ata_port *ap = qc->ap;
2271 struct scsi_cmnd *cmd = qc->scsicmd;
2273 DPRINTK("ATAPI request sense\n");
2275 /* FIXME: is this needed? */
2276 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2278 ap->ops->tf_read(ap, &qc->tf);
2280 /* fill these in, for the case where they are -not- overwritten */
2281 cmd->sense_buffer[0] = 0x70;
2282 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2286 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2287 qc->dma_dir = DMA_FROM_DEVICE;
2289 memset(&qc->cdb, 0, qc->dev->cdb_len);
2290 qc->cdb[0] = REQUEST_SENSE;
2291 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2293 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2294 qc->tf.command = ATA_CMD_PACKET;
2296 if (ata_pio_use_silly(ap)) {
2297 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2298 qc->tf.feature |= ATAPI_PKT_DMA;
2300 qc->tf.protocol = ATA_PROT_ATAPI;
2301 qc->tf.lbam = (8 * 1024) & 0xff;
2302 qc->tf.lbah = (8 * 1024) >> 8;
2304 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2306 qc->complete_fn = atapi_sense_complete;
2313 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2315 struct scsi_cmnd *cmd = qc->scsicmd;
2316 unsigned int err_mask = qc->err_mask;
2318 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2320 /* handle completion from new EH */
2321 if (unlikely(qc->ap->ops->error_handler &&
2322 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2324 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2325 /* FIXME: not quite right; we don't want the
2326 * translation of taskfile registers into a
2327 * sense descriptors, since that's only
2328 * correct for ATA, not ATAPI
2330 ata_gen_passthru_sense(qc);
2333 /* SCSI EH automatically locks door if sdev->locked is
2334 * set. Sometimes door lock request continues to
2335 * fail, for example, when no media is present. This
2336 * creates a loop - SCSI EH issues door lock which
2337 * fails and gets invoked again to acquire sense data
2338 * for the failed command.
2340 * If door lock fails, always clear sdev->locked to
2341 * avoid this infinite loop.
2343 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2344 qc->dev->sdev->locked = 0;
2346 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2352 /* successful completion or old EH failure path */
2353 if (unlikely(err_mask & AC_ERR_DEV)) {
2354 cmd->result = SAM_STAT_CHECK_CONDITION;
2355 atapi_request_sense(qc);
2357 } else if (unlikely(err_mask)) {
2358 /* FIXME: not quite right; we don't want the
2359 * translation of taskfile registers into
2360 * a sense descriptors, since that's only
2361 * correct for ATA, not ATAPI
2363 ata_gen_passthru_sense(qc);
2365 u8 *scsicmd = cmd->cmnd;
2367 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2369 unsigned int buflen;
2371 buflen = ata_scsi_rbuf_get(cmd, &buf);
2373 /* ATAPI devices typically report zero for their SCSI version,
2374 * and sometimes deviate from the spec WRT response data
2375 * format. If SCSI version is reported as zero like normal,
2376 * then we make the following fixups: 1) Fake MMC-5 version,
2377 * to indicate to the Linux scsi midlayer this is a modern
2378 * device. 2) Ensure response data format / ATAPI information
2379 * are always correct.
2386 ata_scsi_rbuf_put(cmd, buf);
2389 cmd->result = SAM_STAT_GOOD;
2396 * atapi_xlat - Initialize PACKET taskfile
2397 * @qc: command structure to be initialized
2400 * spin_lock_irqsave(host lock)
2403 * Zero on success, non-zero on failure.
2405 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2407 struct scsi_cmnd *scmd = qc->scsicmd;
2408 struct ata_device *dev = qc->dev;
2409 int using_pio = (dev->flags & ATA_DFLAG_PIO);
2410 int nodata = (scmd->sc_data_direction == DMA_NONE);
2412 memset(qc->cdb, 0, dev->cdb_len);
2413 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2415 qc->complete_fn = atapi_qc_complete;
2417 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2418 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2419 qc->tf.flags |= ATA_TFLAG_WRITE;
2420 DPRINTK("direction: write\n");
2423 qc->tf.command = ATA_CMD_PACKET;
2424 qc->nbytes = scsi_bufflen(scmd);
2426 /* check whether ATAPI DMA is safe */
2427 if (!using_pio && ata_check_atapi_dma(qc))
2430 if (using_pio || nodata) {
2431 /* no data, or PIO data xfer */
2433 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2435 qc->tf.protocol = ATA_PROT_ATAPI;
2436 qc->tf.lbam = (8 * 1024) & 0xff;
2437 qc->tf.lbah = (8 * 1024) >> 8;
2440 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2441 qc->tf.feature |= ATAPI_PKT_DMA;
2443 if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE))
2444 /* some SATA bridges need us to indicate data xfer direction */
2445 qc->tf.feature |= ATAPI_DMADIR;
2451 static struct ata_device * ata_find_dev(struct ata_port *ap, int devno)
2453 if (ap->nr_pmp_links == 0) {
2454 if (likely(devno < ata_link_max_devices(&ap->link)))
2455 return &ap->link.device[devno];
2457 if (likely(devno < ap->nr_pmp_links))
2458 return &ap->pmp_link[devno].device[0];
2464 static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
2465 const struct scsi_device *scsidev)
2469 /* skip commands not addressed to targets we simulate */
2470 if (ap->nr_pmp_links == 0) {
2471 if (unlikely(scsidev->channel || scsidev->lun))
2473 devno = scsidev->id;
2475 if (unlikely(scsidev->id || scsidev->lun))
2477 devno = scsidev->channel;
2480 return ata_find_dev(ap, devno);
2484 * ata_scsi_dev_enabled - determine if device is enabled
2487 * Determine if commands should be sent to the specified device.
2490 * spin_lock_irqsave(host lock)
2493 * 0 if commands are not allowed / 1 if commands are allowed
2496 static int ata_scsi_dev_enabled(struct ata_device *dev)
2498 if (unlikely(!ata_dev_enabled(dev)))
2501 if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) {
2502 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2503 ata_dev_printk(dev, KERN_WARNING,
2504 "WARNING: ATAPI is %s, device ignored.\n",
2505 atapi_enabled ? "not supported with this driver" : "disabled");
2514 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2515 * @ap: ATA port to which the device is attached
2516 * @scsidev: SCSI device from which we derive the ATA device
2518 * Given various information provided in struct scsi_cmnd,
2519 * map that onto an ATA bus, and using that mapping
2520 * determine which ata_device is associated with the
2521 * SCSI command to be sent.
2524 * spin_lock_irqsave(host lock)
2527 * Associated ATA device, or %NULL if not found.
2529 static struct ata_device *
2530 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2532 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2534 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
2541 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2542 * @byte1: Byte 1 from pass-thru CDB.
2545 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2548 ata_scsi_map_proto(u8 byte1)
2550 switch((byte1 & 0x1e) >> 1) {
2551 case 3: /* Non-data */
2552 return ATA_PROT_NODATA;
2555 case 10: /* UDMA Data-in */
2556 case 11: /* UDMA Data-Out */
2557 return ATA_PROT_DMA;
2559 case 4: /* PIO Data-in */
2560 case 5: /* PIO Data-out */
2561 return ATA_PROT_PIO;
2563 case 0: /* Hard Reset */
2565 case 8: /* Device Diagnostic */
2566 case 9: /* Device Reset */
2567 case 7: /* DMA Queued */
2568 case 12: /* FPDMA */
2569 case 15: /* Return Response Info */
2570 default: /* Reserved */
2574 return ATA_PROT_UNKNOWN;
2578 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2579 * @qc: command structure to be initialized
2581 * Handles either 12 or 16-byte versions of the CDB.
2584 * Zero on success, non-zero on failure.
2586 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2588 struct ata_taskfile *tf = &(qc->tf);
2589 struct scsi_cmnd *scmd = qc->scsicmd;
2590 struct ata_device *dev = qc->dev;
2591 const u8 *cdb = scmd->cmnd;
2593 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2596 /* We may not issue DMA commands if no DMA mode is set */
2597 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2601 * 12 and 16 byte CDBs use different offsets to
2602 * provide the various register values.
2604 if (cdb[0] == ATA_16) {
2606 * 16-byte CDB - may contain extended commands.
2608 * If that is the case, copy the upper byte register values.
2610 if (cdb[1] & 0x01) {
2611 tf->hob_feature = cdb[3];
2612 tf->hob_nsect = cdb[5];
2613 tf->hob_lbal = cdb[7];
2614 tf->hob_lbam = cdb[9];
2615 tf->hob_lbah = cdb[11];
2616 tf->flags |= ATA_TFLAG_LBA48;
2618 tf->flags &= ~ATA_TFLAG_LBA48;
2621 * Always copy low byte, device and command registers.
2623 tf->feature = cdb[4];
2628 tf->device = cdb[13];
2629 tf->command = cdb[14];
2632 * 12-byte CDB - incapable of extended commands.
2634 tf->flags &= ~ATA_TFLAG_LBA48;
2636 tf->feature = cdb[3];
2641 tf->device = cdb[8];
2642 tf->command = cdb[9];
2645 /* enforce correct master/slave bit */
2646 tf->device = dev->devno ?
2647 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2649 /* sanity check for pio multi commands */
2650 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2653 if (is_multi_taskfile(tf)) {
2654 unsigned int multi_count = 1 << (cdb[1] >> 5);
2656 /* compare the passed through multi_count
2657 * with the cached multi_count of libata
2659 if (multi_count != dev->multi_count)
2660 ata_dev_printk(dev, KERN_WARNING,
2661 "invalid multi_count %u ignored\n",
2665 /* READ/WRITE LONG use a non-standard sect_size */
2666 qc->sect_size = ATA_SECT_SIZE;
2667 switch (tf->command) {
2668 case ATA_CMD_READ_LONG:
2669 case ATA_CMD_READ_LONG_ONCE:
2670 case ATA_CMD_WRITE_LONG:
2671 case ATA_CMD_WRITE_LONG_ONCE:
2672 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2674 qc->sect_size = scsi_bufflen(scmd);
2678 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2679 * SET_FEATURES - XFER MODE must be preceded/succeeded
2680 * by an update to hardware-specific registers for each
2681 * controller (i.e. the reason for ->set_piomode(),
2682 * ->set_dmamode(), and ->post_set_mode() hooks).
2684 if ((tf->command == ATA_CMD_SET_FEATURES)
2685 && (tf->feature == SETFEATURES_XFER))
2689 * Set flags so that all registers will be written,
2690 * and pass on write indication (used for PIO/DMA
2693 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2695 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2696 tf->flags |= ATA_TFLAG_WRITE;
2699 * Set transfer length.
2701 * TODO: find out if we need to do more here to
2702 * cover scatter/gather case.
2704 qc->nbytes = scsi_bufflen(scmd);
2706 /* request result TF */
2707 qc->flags |= ATA_QCFLAG_RESULT_TF;
2712 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
2713 /* "Invalid field in cdb" */
2718 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2720 * @cmd: SCSI command opcode to consider
2722 * Look up the SCSI command given, and determine whether the
2723 * SCSI command is to be translated or simulated.
2726 * Pointer to translation function if possible, %NULL if not.
2729 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2739 return ata_scsi_rw_xlat;
2741 case SYNCHRONIZE_CACHE:
2742 if (ata_try_flush_cache(dev))
2743 return ata_scsi_flush_xlat;
2748 return ata_scsi_verify_xlat;
2752 return ata_scsi_pass_thru;
2755 return ata_scsi_start_stop_xlat;
2762 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2763 * @ap: ATA port to which the command was being sent
2764 * @cmd: SCSI command to dump
2766 * Prints the contents of a SCSI command via printk().
2769 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2770 struct scsi_cmnd *cmd)
2773 struct scsi_device *scsidev = cmd->device;
2774 u8 *scsicmd = cmd->cmnd;
2776 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2778 scsidev->channel, scsidev->id, scsidev->lun,
2779 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2780 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2785 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2786 void (*done)(struct scsi_cmnd *),
2787 struct ata_device *dev)
2789 u8 scsi_op = scmd->cmnd[0];
2790 ata_xlat_func_t xlat_func;
2793 if (dev->class == ATA_DEV_ATA) {
2794 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2797 xlat_func = ata_get_xlat_func(dev, scsi_op);
2799 if (unlikely(!scmd->cmd_len))
2803 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2804 /* relay SCSI command to ATAPI device */
2805 if (unlikely(scmd->cmd_len > dev->cdb_len))
2808 xlat_func = atapi_xlat;
2810 /* ATA_16 passthru, treat as an ATA command */
2811 if (unlikely(scmd->cmd_len > 16))
2814 xlat_func = ata_get_xlat_func(dev, scsi_op);
2819 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
2821 ata_scsi_simulate(dev, scmd, done);
2826 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
2827 scmd->cmd_len, scsi_op, dev->cdb_len);
2828 scmd->result = DID_ERROR << 16;
2834 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2835 * @cmd: SCSI command to be sent
2836 * @done: Completion function, called when command is complete
2838 * In some cases, this function translates SCSI commands into
2839 * ATA taskfiles, and queues the taskfiles to be sent to
2840 * hardware. In other cases, this function simulates a
2841 * SCSI device by evaluating and responding to certain
2842 * SCSI commands. This creates the overall effect of
2843 * ATA and ATAPI devices appearing as SCSI devices.
2846 * Releases scsi-layer-held lock, and obtains host lock.
2849 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2852 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2854 struct ata_port *ap;
2855 struct ata_device *dev;
2856 struct scsi_device *scsidev = cmd->device;
2857 struct Scsi_Host *shost = scsidev->host;
2860 ap = ata_shost_to_port(shost);
2862 spin_unlock(shost->host_lock);
2863 spin_lock(ap->lock);
2865 ata_scsi_dump_cdb(ap, cmd);
2867 dev = ata_scsi_find_dev(ap, scsidev);
2869 rc = __ata_scsi_queuecmd(cmd, done, dev);
2871 cmd->result = (DID_BAD_TARGET << 16);
2875 spin_unlock(ap->lock);
2876 spin_lock(shost->host_lock);
2881 * ata_scsi_simulate - simulate SCSI command on ATA device
2882 * @dev: the target device
2883 * @cmd: SCSI command being sent to device.
2884 * @done: SCSI command completion function.
2886 * Interprets and directly executes a select list of SCSI commands
2887 * that can be handled internally.
2890 * spin_lock_irqsave(host lock)
2893 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
2894 void (*done)(struct scsi_cmnd *))
2896 struct ata_scsi_args args;
2897 const u8 *scsicmd = cmd->cmnd;
2905 switch(scsicmd[0]) {
2906 /* TODO: worth improving? */
2908 ata_scsi_invalid_field(cmd, done);
2912 if (scsicmd[1] & 2) /* is CmdDt set? */
2913 ata_scsi_invalid_field(cmd, done);
2914 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2915 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2916 else switch (scsicmd[2]) {
2918 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2921 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2924 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2927 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
2930 ata_scsi_invalid_field(cmd, done);
2937 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2940 case MODE_SELECT: /* unconditionally return */
2941 case MODE_SELECT_10: /* bad-field-in-cdb */
2942 ata_scsi_invalid_field(cmd, done);
2946 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2949 case SERVICE_ACTION_IN:
2950 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2951 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2953 ata_scsi_invalid_field(cmd, done);
2957 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2961 ata_scsi_set_sense(cmd, 0, 0, 0);
2962 cmd->result = (DRIVER_SENSE << 24);
2966 /* if we reach this, then writeback caching is disabled,
2967 * turning this into a no-op.
2969 case SYNCHRONIZE_CACHE:
2972 /* no-op's, complete with success */
2976 case TEST_UNIT_READY:
2977 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2980 case SEND_DIAGNOSTIC:
2981 tmp8 = scsicmd[1] & ~(1 << 3);
2982 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
2983 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2985 ata_scsi_invalid_field(cmd, done);
2988 /* all other commands */
2990 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2991 /* "Invalid command operation code" */
2997 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3001 for (i = 0; i < host->n_ports; i++) {
3002 struct ata_port *ap = host->ports[i];
3003 struct Scsi_Host *shost;
3006 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3010 *(struct ata_port **)&shost->hostdata[0] = ap;
3011 ap->scsi_host = shost;
3013 shost->transportt = &ata_scsi_transport_template;
3014 shost->unique_id = ap->print_id;
3017 shost->max_channel = 1;
3018 shost->max_cmd_len = 16;
3020 /* Schedule policy is determined by ->qc_defer()
3021 * callback and it needs to see every deferred qc.
3022 * Set host_blocked to 1 to prevent SCSI midlayer from
3023 * automatically deferring requests.
3025 shost->max_host_blocked = 1;
3027 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3035 scsi_host_put(host->ports[i]->scsi_host);
3038 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3040 scsi_remove_host(shost);
3041 scsi_host_put(shost);
3046 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3049 struct ata_device *last_failed_dev = NULL;
3050 struct ata_link *link;
3051 struct ata_device *dev;
3053 if (ap->flags & ATA_FLAG_DISABLED)
3057 ata_port_for_each_link(link, ap) {
3058 ata_link_for_each_dev(dev, link) {
3059 struct scsi_device *sdev;
3060 int channel = 0, id = 0;
3062 if (!ata_dev_enabled(dev) || dev->sdev)
3065 if (ata_is_host_link(link))
3068 channel = link->pmp;
3070 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3072 if (!IS_ERR(sdev)) {
3074 scsi_device_put(sdev);
3079 /* If we scanned while EH was in progress or allocation
3080 * failure occurred, scan would have failed silently. Check
3081 * whether all devices are attached.
3083 ata_port_for_each_link(link, ap) {
3084 ata_link_for_each_dev(dev, link) {
3085 if (ata_dev_enabled(dev) && !dev->sdev)
3093 /* we're missing some SCSI devices */
3095 /* If caller requested synchrnous scan && we've made
3096 * any progress, sleep briefly and repeat.
3098 if (dev != last_failed_dev) {
3100 last_failed_dev = dev;
3104 /* We might be failing to detect boot device, give it
3105 * a few more chances.
3112 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3113 "failed without making any progress,\n"
3114 " switching to async\n");
3117 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3118 round_jiffies_relative(HZ));
3122 * ata_scsi_offline_dev - offline attached SCSI device
3123 * @dev: ATA device to offline attached SCSI device for
3125 * This function is called from ata_eh_hotplug() and responsible
3126 * for taking the SCSI device attached to @dev offline. This
3127 * function is called with host lock which protects dev->sdev
3131 * spin_lock_irqsave(host lock)
3134 * 1 if attached SCSI device exists, 0 otherwise.
3136 int ata_scsi_offline_dev(struct ata_device *dev)
3139 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3146 * ata_scsi_remove_dev - remove attached SCSI device
3147 * @dev: ATA device to remove attached SCSI device for
3149 * This function is called from ata_eh_scsi_hotplug() and
3150 * responsible for removing the SCSI device attached to @dev.
3153 * Kernel thread context (may sleep).
3155 static void ata_scsi_remove_dev(struct ata_device *dev)
3157 struct ata_port *ap = dev->link->ap;
3158 struct scsi_device *sdev;
3159 unsigned long flags;
3161 /* Alas, we need to grab scan_mutex to ensure SCSI device
3162 * state doesn't change underneath us and thus
3163 * scsi_device_get() always succeeds. The mutex locking can
3164 * be removed if there is __scsi_device_get() interface which
3165 * increments reference counts regardless of device state.
3167 mutex_lock(&ap->scsi_host->scan_mutex);
3168 spin_lock_irqsave(ap->lock, flags);
3170 /* clearing dev->sdev is protected by host lock */
3175 /* If user initiated unplug races with us, sdev can go
3176 * away underneath us after the host lock and
3177 * scan_mutex are released. Hold onto it.
3179 if (scsi_device_get(sdev) == 0) {
3180 /* The following ensures the attached sdev is
3181 * offline on return from ata_scsi_offline_dev()
3182 * regardless it wins or loses the race
3183 * against this function.
3185 scsi_device_set_state(sdev, SDEV_OFFLINE);
3192 spin_unlock_irqrestore(ap->lock, flags);
3193 mutex_unlock(&ap->scsi_host->scan_mutex);
3196 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3197 sdev->sdev_gendev.bus_id);
3199 scsi_remove_device(sdev);
3200 scsi_device_put(sdev);
3204 static void ata_scsi_handle_link_detach(struct ata_link *link)
3206 struct ata_port *ap = link->ap;
3207 struct ata_device *dev;
3209 ata_link_for_each_dev(dev, link) {
3210 unsigned long flags;
3212 if (!(dev->flags & ATA_DFLAG_DETACHED))
3215 spin_lock_irqsave(ap->lock, flags);
3216 dev->flags &= ~ATA_DFLAG_DETACHED;
3217 spin_unlock_irqrestore(ap->lock, flags);
3219 ata_scsi_remove_dev(dev);
3224 * ata_scsi_media_change_notify - send media change event
3225 * @atadev: Pointer to the disk device with media change event
3227 * Tell the block layer to send a media change notification
3231 * spin_lock_irqsave(host lock)
3233 void ata_scsi_media_change_notify(struct ata_device *dev)
3235 #ifdef OTHER_AN_PATCHES_HAVE_BEEN_APPLIED
3237 scsi_device_event_notify(dev->sdev, SDEV_MEDIA_CHANGE);
3240 EXPORT_SYMBOL_GPL(ata_scsi_media_change_notify);
3243 * ata_scsi_hotplug - SCSI part of hotplug
3244 * @work: Pointer to ATA port to perform SCSI hotplug on
3246 * Perform SCSI part of hotplug. It's executed from a separate
3247 * workqueue after EH completes. This is necessary because SCSI
3248 * hot plugging requires working EH and hot unplugging is
3249 * synchronized with hot plugging with a mutex.
3252 * Kernel thread context (may sleep).
3254 void ata_scsi_hotplug(struct work_struct *work)
3256 struct ata_port *ap =
3257 container_of(work, struct ata_port, hotplug_task.work);
3260 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3261 DPRINTK("ENTER/EXIT - unloading\n");
3267 /* Unplug detached devices. We cannot use link iterator here
3268 * because PMP links have to be scanned even if PMP is
3269 * currently not attached. Iterate manually.
3271 ata_scsi_handle_link_detach(&ap->link);
3273 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3274 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3276 /* scan for new ones */
3277 ata_scsi_scan_host(ap, 0);
3283 * ata_scsi_user_scan - indication for user-initiated bus scan
3284 * @shost: SCSI host to scan
3285 * @channel: Channel to scan
3289 * This function is called when user explicitly requests bus
3290 * scan. Set probe pending flag and invoke EH.
3293 * SCSI layer (we don't care)
3298 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3299 unsigned int id, unsigned int lun)
3301 struct ata_port *ap = ata_shost_to_port(shost);
3302 unsigned long flags;
3305 if (!ap->ops->error_handler)
3308 if (lun != SCAN_WILD_CARD && lun)
3311 if (ap->nr_pmp_links == 0) {
3312 if (channel != SCAN_WILD_CARD && channel)
3316 if (id != SCAN_WILD_CARD && id)
3321 spin_lock_irqsave(ap->lock, flags);
3323 if (devno == SCAN_WILD_CARD) {
3324 struct ata_link *link;
3326 ata_port_for_each_link(link, ap) {
3327 struct ata_eh_info *ehi = &link->eh_info;
3328 ehi->probe_mask |= (1 << ata_link_max_devices(link)) - 1;
3329 ehi->action |= ATA_EH_SOFTRESET;
3332 struct ata_device *dev = ata_find_dev(ap, devno);
3335 struct ata_eh_info *ehi = &dev->link->eh_info;
3336 ehi->probe_mask |= 1 << dev->devno;
3337 ehi->action |= ATA_EH_SOFTRESET;
3338 ehi->flags |= ATA_EHI_RESUME_LINK;
3344 ata_port_schedule_eh(ap);
3345 spin_unlock_irqrestore(ap->lock, flags);
3346 ata_port_wait_eh(ap);
3348 spin_unlock_irqrestore(ap->lock, flags);
3354 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3355 * @work: Pointer to ATA port to perform scsi_rescan_device()
3357 * After ATA pass thru (SAT) commands are executed successfully,
3358 * libata need to propagate the changes to SCSI layer. This
3359 * function must be executed from ata_aux_wq such that sdev
3360 * attach/detach don't race with rescan.
3363 * Kernel thread context (may sleep).
3365 void ata_scsi_dev_rescan(struct work_struct *work)
3367 struct ata_port *ap =
3368 container_of(work, struct ata_port, scsi_rescan_task);
3369 struct ata_link *link;
3370 struct ata_device *dev;
3371 unsigned long flags;
3373 spin_lock_irqsave(ap->lock, flags);
3375 ata_port_for_each_link(link, ap) {
3376 ata_link_for_each_dev(dev, link) {
3377 struct scsi_device *sdev = dev->sdev;
3379 if (!ata_dev_enabled(dev) || !sdev)
3381 if (scsi_device_get(sdev))
3384 spin_unlock_irqrestore(ap->lock, flags);
3385 scsi_rescan_device(&(sdev->sdev_gendev));
3386 scsi_device_put(sdev);
3387 spin_lock_irqsave(ap->lock, flags);
3391 spin_unlock_irqrestore(ap->lock, flags);
3395 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3396 * @host: ATA host container for all SAS ports
3397 * @port_info: Information from low-level host driver
3398 * @shost: SCSI host that the scsi device is attached to
3401 * PCI/etc. bus probe sem.
3404 * ata_port pointer on success / NULL on failure.
3407 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3408 struct ata_port_info *port_info,
3409 struct Scsi_Host *shost)
3411 struct ata_port *ap;
3413 ap = ata_port_alloc(host);
3418 ap->lock = shost->host_lock;
3419 ap->pio_mask = port_info->pio_mask;
3420 ap->mwdma_mask = port_info->mwdma_mask;
3421 ap->udma_mask = port_info->udma_mask;
3422 ap->flags |= port_info->flags;
3423 ap->ops = port_info->port_ops;
3424 ap->cbl = ATA_CBL_SATA;
3428 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3431 * ata_sas_port_start - Set port up for dma.
3432 * @ap: Port to initialize
3434 * Called just after data structures for each port are
3435 * initialized. Allocates DMA pad.
3437 * May be used as the port_start() entry in ata_port_operations.
3440 * Inherited from caller.
3442 int ata_sas_port_start(struct ata_port *ap)
3444 return ata_pad_alloc(ap, ap->dev);
3446 EXPORT_SYMBOL_GPL(ata_sas_port_start);
3449 * ata_port_stop - Undo ata_sas_port_start()
3450 * @ap: Port to shut down
3452 * Frees the DMA pad.
3454 * May be used as the port_stop() entry in ata_port_operations.
3457 * Inherited from caller.
3460 void ata_sas_port_stop(struct ata_port *ap)
3462 ata_pad_free(ap, ap->dev);
3464 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3467 * ata_sas_port_init - Initialize a SATA device
3468 * @ap: SATA port to initialize
3471 * PCI/etc. bus probe sem.
3474 * Zero on success, non-zero on error.
3477 int ata_sas_port_init(struct ata_port *ap)
3479 int rc = ap->ops->port_start(ap);
3482 ap->print_id = ata_print_id++;
3483 rc = ata_bus_probe(ap);
3488 EXPORT_SYMBOL_GPL(ata_sas_port_init);
3491 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3492 * @ap: SATA port to destroy
3496 void ata_sas_port_destroy(struct ata_port *ap)
3498 if (ap->ops->port_stop)
3499 ap->ops->port_stop(ap);
3502 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3505 * ata_sas_slave_configure - Default slave_config routine for libata devices
3506 * @sdev: SCSI device to configure
3507 * @ap: ATA port to which SCSI device is attached
3513 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3515 ata_scsi_sdev_config(sdev);
3516 ata_scsi_dev_config(sdev, ap->link.device);
3519 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3522 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3523 * @cmd: SCSI command to be sent
3524 * @done: Completion function, called when command is complete
3525 * @ap: ATA port to which the command is being sent
3528 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3532 int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3533 struct ata_port *ap)
3537 ata_scsi_dump_cdb(ap, cmd);
3539 if (likely(ata_scsi_dev_enabled(ap->link.device)))
3540 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
3542 cmd->result = (DID_BAD_TARGET << 16);
3547 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);