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 if (qc->dev->horkage & ATA_HORKAGE_SKIP_PM) {
949 /* the device lacks PM support, finish without doing anything */
950 scmd->result = SAM_STAT_GOOD;
955 tf->nsect = 1; /* 1 sector, lba=0 */
957 if (qc->dev->flags & ATA_DFLAG_LBA) {
958 tf->flags |= ATA_TFLAG_LBA;
963 tf->device |= ATA_LBA;
966 tf->lbal = 0x1; /* sect */
967 tf->lbam = 0x0; /* cyl low */
968 tf->lbah = 0x0; /* cyl high */
971 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
973 /* XXX: This is for backward compatibility, will be
974 * removed. Read Documentation/feature-removal-schedule.txt
977 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
978 (system_state == SYSTEM_HALT ||
979 system_state == SYSTEM_POWER_OFF)) {
980 static unsigned long warned = 0;
982 if (!test_and_set_bit(0, &warned)) {
983 ata_dev_printk(qc->dev, KERN_WARNING,
984 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
985 "UPDATE SHUTDOWN UTILITY\n");
986 ata_dev_printk(qc->dev, KERN_WARNING,
987 "For more info, visit "
988 "http://linux-ata.org/shutdown.html\n");
990 /* ->scsi_done is not used, use it for
991 * delayed completion.
993 scmd->scsi_done = qc->scsidone;
994 qc->scsidone = ata_delayed_done;
996 scmd->result = SAM_STAT_GOOD;
1000 /* Issue ATA STANDBY IMMEDIATE command */
1001 tf->command = ATA_CMD_STANDBYNOW1;
1005 * Standby and Idle condition timers could be implemented but that
1006 * would require libata to implement the Power condition mode page
1007 * and allow the user to change it. Changing mode pages requires
1008 * MODE SELECT to be implemented.
1014 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1015 /* "Invalid field in cbd" */
1021 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1022 * @qc: Storage for translated ATA taskfile
1024 * Sets up an ATA taskfile to issue FLUSH CACHE or
1028 * spin_lock_irqsave(host lock)
1031 * Zero on success, non-zero on error.
1033 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1035 struct ata_taskfile *tf = &qc->tf;
1037 tf->flags |= ATA_TFLAG_DEVICE;
1038 tf->protocol = ATA_PROT_NODATA;
1040 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1041 tf->command = ATA_CMD_FLUSH_EXT;
1043 tf->command = ATA_CMD_FLUSH;
1049 * scsi_6_lba_len - Get LBA and transfer length
1050 * @cdb: SCSI command to translate
1052 * Calculate LBA and transfer length for 6-byte commands.
1056 * @plen: the transfer length
1058 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1063 VPRINTK("six-byte command\n");
1065 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1066 lba |= ((u64)cdb[2]) << 8;
1067 lba |= ((u64)cdb[3]);
1076 * scsi_10_lba_len - Get LBA and transfer length
1077 * @cdb: SCSI command to translate
1079 * Calculate LBA and transfer length for 10-byte commands.
1083 * @plen: the transfer length
1085 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1090 VPRINTK("ten-byte command\n");
1092 lba |= ((u64)cdb[2]) << 24;
1093 lba |= ((u64)cdb[3]) << 16;
1094 lba |= ((u64)cdb[4]) << 8;
1095 lba |= ((u64)cdb[5]);
1097 len |= ((u32)cdb[7]) << 8;
1098 len |= ((u32)cdb[8]);
1105 * scsi_16_lba_len - Get LBA and transfer length
1106 * @cdb: SCSI command to translate
1108 * Calculate LBA and transfer length for 16-byte commands.
1112 * @plen: the transfer length
1114 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1119 VPRINTK("sixteen-byte command\n");
1121 lba |= ((u64)cdb[2]) << 56;
1122 lba |= ((u64)cdb[3]) << 48;
1123 lba |= ((u64)cdb[4]) << 40;
1124 lba |= ((u64)cdb[5]) << 32;
1125 lba |= ((u64)cdb[6]) << 24;
1126 lba |= ((u64)cdb[7]) << 16;
1127 lba |= ((u64)cdb[8]) << 8;
1128 lba |= ((u64)cdb[9]);
1130 len |= ((u32)cdb[10]) << 24;
1131 len |= ((u32)cdb[11]) << 16;
1132 len |= ((u32)cdb[12]) << 8;
1133 len |= ((u32)cdb[13]);
1140 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1141 * @qc: Storage for translated ATA taskfile
1143 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1146 * spin_lock_irqsave(host lock)
1149 * Zero on success, non-zero on error.
1151 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1153 struct scsi_cmnd *scmd = qc->scsicmd;
1154 struct ata_taskfile *tf = &qc->tf;
1155 struct ata_device *dev = qc->dev;
1156 u64 dev_sectors = qc->dev->n_sectors;
1157 const u8 *cdb = scmd->cmnd;
1161 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1162 tf->protocol = ATA_PROT_NODATA;
1164 if (cdb[0] == VERIFY) {
1165 if (scmd->cmd_len < 10)
1167 scsi_10_lba_len(cdb, &block, &n_block);
1168 } else if (cdb[0] == VERIFY_16) {
1169 if (scmd->cmd_len < 16)
1171 scsi_16_lba_len(cdb, &block, &n_block);
1177 if (block >= dev_sectors)
1179 if ((block + n_block) > dev_sectors)
1182 if (dev->flags & ATA_DFLAG_LBA) {
1183 tf->flags |= ATA_TFLAG_LBA;
1185 if (lba_28_ok(block, n_block)) {
1187 tf->command = ATA_CMD_VERIFY;
1188 tf->device |= (block >> 24) & 0xf;
1189 } else if (lba_48_ok(block, n_block)) {
1190 if (!(dev->flags & ATA_DFLAG_LBA48))
1194 tf->flags |= ATA_TFLAG_LBA48;
1195 tf->command = ATA_CMD_VERIFY_EXT;
1197 tf->hob_nsect = (n_block >> 8) & 0xff;
1199 tf->hob_lbah = (block >> 40) & 0xff;
1200 tf->hob_lbam = (block >> 32) & 0xff;
1201 tf->hob_lbal = (block >> 24) & 0xff;
1203 /* request too large even for LBA48 */
1206 tf->nsect = n_block & 0xff;
1208 tf->lbah = (block >> 16) & 0xff;
1209 tf->lbam = (block >> 8) & 0xff;
1210 tf->lbal = block & 0xff;
1212 tf->device |= ATA_LBA;
1215 u32 sect, head, cyl, track;
1217 if (!lba_28_ok(block, n_block))
1220 /* Convert LBA to CHS */
1221 track = (u32)block / dev->sectors;
1222 cyl = track / dev->heads;
1223 head = track % dev->heads;
1224 sect = (u32)block % dev->sectors + 1;
1226 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1227 (u32)block, track, cyl, head, sect);
1229 /* Check whether the converted CHS can fit.
1233 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1236 tf->command = ATA_CMD_VERIFY;
1237 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1240 tf->lbah = cyl >> 8;
1247 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1248 /* "Invalid field in cbd" */
1252 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1253 /* "Logical Block Address out of range" */
1257 scmd->result = SAM_STAT_GOOD;
1262 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1263 * @qc: Storage for translated ATA taskfile
1265 * Converts any of six SCSI read/write commands into the
1266 * ATA counterpart, including starting sector (LBA),
1267 * sector count, and taking into account the device's LBA48
1270 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1271 * %WRITE_16 are currently supported.
1274 * spin_lock_irqsave(host lock)
1277 * Zero on success, non-zero on error.
1279 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1281 struct scsi_cmnd *scmd = qc->scsicmd;
1282 const u8 *cdb = scmd->cmnd;
1283 unsigned int tf_flags = 0;
1288 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1289 tf_flags |= ATA_TFLAG_WRITE;
1291 /* Calculate the SCSI LBA, transfer length and FUA. */
1295 if (unlikely(scmd->cmd_len < 10))
1297 scsi_10_lba_len(cdb, &block, &n_block);
1298 if (unlikely(cdb[1] & (1 << 3)))
1299 tf_flags |= ATA_TFLAG_FUA;
1303 if (unlikely(scmd->cmd_len < 6))
1305 scsi_6_lba_len(cdb, &block, &n_block);
1307 /* for 6-byte r/w commands, transfer length 0
1308 * means 256 blocks of data, not 0 block.
1315 if (unlikely(scmd->cmd_len < 16))
1317 scsi_16_lba_len(cdb, &block, &n_block);
1318 if (unlikely(cdb[1] & (1 << 3)))
1319 tf_flags |= ATA_TFLAG_FUA;
1322 DPRINTK("no-byte command\n");
1326 /* Check and compose ATA command */
1328 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1329 * length 0 means transfer 0 block of data.
1330 * However, for ATA R/W commands, sector count 0 means
1331 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1333 * WARNING: one or two older ATA drives treat 0 as 0...
1337 qc->flags |= ATA_QCFLAG_IO;
1338 qc->nbytes = n_block * ATA_SECT_SIZE;
1340 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1342 if (likely(rc == 0))
1347 /* treat all other errors as -EINVAL, fall through */
1349 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1350 /* "Invalid field in cbd" */
1354 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1355 /* "Logical Block Address out of range" */
1359 scmd->result = SAM_STAT_GOOD;
1363 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1365 struct ata_port *ap = qc->ap;
1366 struct scsi_cmnd *cmd = qc->scsicmd;
1367 u8 *cdb = cmd->cmnd;
1368 int need_sense = (qc->err_mask != 0);
1370 /* We snoop the SET_FEATURES - Write Cache ON/OFF command, and
1371 * schedule EH_REVALIDATE operation to update the IDENTIFY DEVICE
1374 if (ap->ops->error_handler && !need_sense) {
1375 switch (qc->tf.command) {
1376 case ATA_CMD_SET_FEATURES:
1377 if ((qc->tf.feature == SETFEATURES_WC_ON) ||
1378 (qc->tf.feature == SETFEATURES_WC_OFF)) {
1379 ap->link.eh_info.action |= ATA_EH_REVALIDATE;
1380 ata_port_schedule_eh(ap);
1384 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
1385 case ATA_CMD_SET_MULTI: /* multi_count changed */
1386 ap->link.eh_info.action |= ATA_EH_REVALIDATE;
1387 ata_port_schedule_eh(ap);
1392 /* For ATA pass thru (SAT) commands, generate a sense block if
1393 * user mandated it or if there's an error. Note that if we
1394 * generate because the user forced us to, a check condition
1395 * is generated and the ATA register values are returned
1396 * whether the command completed successfully or not. If there
1397 * was no error, SK, ASC and ASCQ will all be zero.
1399 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1400 ((cdb[2] & 0x20) || need_sense)) {
1401 ata_gen_passthru_sense(qc);
1404 cmd->result = SAM_STAT_GOOD;
1406 /* TODO: decide which descriptor format to use
1407 * for 48b LBA devices and call that here
1408 * instead of the fixed desc, which is only
1409 * good for smaller LBA (and maybe CHS?)
1412 ata_gen_ata_sense(qc);
1416 /* XXX: track spindown state for spindown skipping and warning */
1417 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1418 qc->tf.command == ATA_CMD_STANDBYNOW1))
1419 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1420 else if (likely(system_state != SYSTEM_HALT &&
1421 system_state != SYSTEM_POWER_OFF))
1422 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1424 if (need_sense && !ap->ops->error_handler)
1425 ata_dump_status(ap->print_id, &qc->result_tf);
1433 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1434 * @dev: ATA device to which the command is addressed
1435 * @cmd: SCSI command to execute
1436 * @done: SCSI command completion function
1437 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1439 * Our ->queuecommand() function has decided that the SCSI
1440 * command issued can be directly translated into an ATA
1441 * command, rather than handled internally.
1443 * This function sets up an ata_queued_cmd structure for the
1444 * SCSI command, and sends that ata_queued_cmd to the hardware.
1446 * The xlat_func argument (actor) returns 0 if ready to execute
1447 * ATA command, else 1 to finish translation. If 1 is returned
1448 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1449 * to be set reflecting an error condition or clean (early)
1453 * spin_lock_irqsave(host lock)
1456 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1457 * needs to be deferred.
1459 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1460 void (*done)(struct scsi_cmnd *),
1461 ata_xlat_func_t xlat_func)
1463 struct ata_port *ap = dev->link->ap;
1464 struct ata_queued_cmd *qc;
1469 qc = ata_scsi_qc_new(dev, cmd, done);
1473 /* data is present; dma-map it */
1474 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1475 cmd->sc_data_direction == DMA_TO_DEVICE) {
1476 if (unlikely(scsi_bufflen(cmd) < 1)) {
1477 ata_dev_printk(dev, KERN_WARNING,
1478 "WARNING: zero len r/w req\n");
1482 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1484 qc->dma_dir = cmd->sc_data_direction;
1487 qc->complete_fn = ata_scsi_qc_complete;
1492 if (ap->ops->qc_defer) {
1493 if ((rc = ap->ops->qc_defer(qc)))
1497 /* select device, send command to hardware */
1506 DPRINTK("EXIT - early finish (good or error)\n");
1511 cmd->result = (DID_ERROR << 16);
1514 DPRINTK("EXIT - internal\n");
1519 DPRINTK("EXIT - defer\n");
1520 if (rc == ATA_DEFER_LINK)
1521 return SCSI_MLQUEUE_DEVICE_BUSY;
1523 return SCSI_MLQUEUE_HOST_BUSY;
1527 * ata_scsi_rbuf_get - Map response buffer.
1528 * @cmd: SCSI command containing buffer to be mapped.
1529 * @buf_out: Pointer to mapped area.
1531 * Maps buffer contained within SCSI command @cmd.
1534 * spin_lock_irqsave(host lock)
1537 * Length of response buffer.
1540 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1543 unsigned int buflen;
1545 struct scatterlist *sg = scsi_sglist(cmd);
1548 buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
1549 buflen = sg->length;
1560 * ata_scsi_rbuf_put - Unmap response buffer.
1561 * @cmd: SCSI command containing buffer to be unmapped.
1562 * @buf: buffer to unmap
1564 * Unmaps response buffer contained within @cmd.
1567 * spin_lock_irqsave(host lock)
1570 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1572 struct scatterlist *sg = scsi_sglist(cmd);
1574 kunmap_atomic(buf - sg->offset, KM_IRQ0);
1578 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1579 * @args: device IDENTIFY data / SCSI command of interest.
1580 * @actor: Callback hook for desired SCSI command simulator
1582 * Takes care of the hard work of simulating a SCSI command...
1583 * Mapping the response buffer, calling the command's handler,
1584 * and handling the handler's return value. This return value
1585 * indicates whether the handler wishes the SCSI command to be
1586 * completed successfully (0), or not (in which case cmd->result
1587 * and sense buffer are assumed to be set).
1590 * spin_lock_irqsave(host lock)
1593 void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1594 unsigned int (*actor) (struct ata_scsi_args *args,
1595 u8 *rbuf, unsigned int buflen))
1598 unsigned int buflen, rc;
1599 struct scsi_cmnd *cmd = args->cmd;
1601 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1602 memset(rbuf, 0, buflen);
1603 rc = actor(args, rbuf, buflen);
1604 ata_scsi_rbuf_put(cmd, rbuf);
1607 cmd->result = SAM_STAT_GOOD;
1612 * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer
1613 * @idx: byte index into SCSI response buffer
1614 * @val: value to set
1616 * To be used by SCSI command simulator functions. This macros
1617 * expects two local variables, u8 *rbuf and unsigned int buflen,
1623 #define ATA_SCSI_RBUF_SET(idx, val) do { \
1624 if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \
1628 * ata_scsiop_inq_std - Simulate INQUIRY command
1629 * @args: device IDENTIFY data / SCSI command of interest.
1630 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1631 * @buflen: Response buffer length.
1633 * Returns standard device identification data associated
1634 * with non-VPD INQUIRY command output.
1637 * spin_lock_irqsave(host lock)
1640 unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1641 unsigned int buflen)
1646 0x5, /* claim SPC-3 version compatibility */
1651 /* set scsi removeable (RMB) bit per ata bit */
1652 if (ata_id_removeable(args->id))
1657 memcpy(rbuf, hdr, sizeof(hdr));
1660 memcpy(&rbuf[8], "ATA ", 8);
1661 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1662 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1663 if (rbuf[32] == 0 || rbuf[32] == ' ')
1664 memcpy(&rbuf[32], "n/a ", 4);
1668 const u8 versions[] = {
1669 0x60, /* SAM-3 (no version claimed) */
1672 0x20, /* SBC-2 (no version claimed) */
1675 0x60 /* SPC-3 (no version claimed) */
1678 memcpy(rbuf + 59, versions, sizeof(versions));
1685 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1686 * @args: device IDENTIFY data / SCSI command of interest.
1687 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1688 * @buflen: Response buffer length.
1690 * Returns list of inquiry VPD pages available.
1693 * spin_lock_irqsave(host lock)
1696 unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1697 unsigned int buflen)
1699 const u8 pages[] = {
1700 0x00, /* page 0x00, this page */
1701 0x80, /* page 0x80, unit serial no page */
1702 0x83 /* page 0x83, device ident page */
1704 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1707 memcpy(rbuf + 4, pages, sizeof(pages));
1713 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1714 * @args: device IDENTIFY data / SCSI command of interest.
1715 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1716 * @buflen: Response buffer length.
1718 * Returns ATA device serial number.
1721 * spin_lock_irqsave(host lock)
1724 unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1725 unsigned int buflen)
1729 0x80, /* this page code */
1731 ATA_ID_SERNO_LEN, /* page len */
1733 memcpy(rbuf, hdr, sizeof(hdr));
1735 if (buflen > (ATA_ID_SERNO_LEN + 4 - 1))
1736 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1737 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1743 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1744 * @args: device IDENTIFY data / SCSI command of interest.
1745 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1746 * @buflen: Response buffer length.
1748 * Yields two logical unit device identification designators:
1749 * - vendor specific ASCII containing the ATA serial number
1750 * - SAT defined "t10 vendor id based" containing ASCII vendor
1751 * name ("ATA "), model and serial numbers.
1754 * spin_lock_irqsave(host lock)
1757 unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1758 unsigned int buflen)
1761 const int sat_model_serial_desc_len = 68;
1763 rbuf[1] = 0x83; /* this page code */
1766 if (buflen > (ATA_ID_SERNO_LEN + num + 3)) {
1767 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1769 rbuf[num + 3] = ATA_ID_SERNO_LEN;
1771 ata_id_string(args->id, (unsigned char *) rbuf + num,
1772 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1773 num += ATA_ID_SERNO_LEN;
1775 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1776 /* SAT defined lu model and serial numbers descriptor */
1777 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1780 rbuf[num + 3] = sat_model_serial_desc_len;
1782 memcpy(rbuf + num, "ATA ", 8);
1784 ata_id_string(args->id, (unsigned char *) rbuf + num,
1785 ATA_ID_PROD, ATA_ID_PROD_LEN);
1786 num += ATA_ID_PROD_LEN;
1787 ata_id_string(args->id, (unsigned char *) rbuf + num,
1788 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1789 num += ATA_ID_SERNO_LEN;
1791 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1796 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
1797 * @args: device IDENTIFY data / SCSI command of interest.
1798 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1799 * @buflen: Response buffer length.
1801 * Yields SAT-specified ATA VPD page.
1804 * spin_lock_irqsave(host lock)
1807 unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf,
1808 unsigned int buflen)
1811 struct ata_taskfile tf;
1817 memset(&pbuf, 0, sizeof(pbuf));
1818 memset(&tf, 0, sizeof(tf));
1820 pbuf[1] = 0x89; /* our page code */
1821 pbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
1822 pbuf[3] = (0x238 & 0xff);
1824 memcpy(&pbuf[8], "linux ", 8);
1825 memcpy(&pbuf[16], "libata ", 16);
1826 memcpy(&pbuf[32], DRV_VERSION, 4);
1827 ata_id_string(args->id, &pbuf[32], ATA_ID_FW_REV, 4);
1829 /* we don't store the ATA device signature, so we fake it */
1831 tf.command = ATA_DRDY; /* really, this is Status reg */
1835 ata_tf_to_fis(&tf, 0, 1, &pbuf[36]); /* TODO: PMP? */
1836 pbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
1838 pbuf[56] = ATA_CMD_ID_ATA;
1840 i = min(buflen, 60U);
1841 memcpy(rbuf, &pbuf[0], i);
1847 memcpy(&rbuf[60], &args->id[0], min(buflen, 512U));
1852 * ata_scsiop_noop - Command handler that simply returns success.
1853 * @args: device IDENTIFY data / SCSI command of interest.
1854 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1855 * @buflen: Response buffer length.
1857 * No operation. Simply returns success to caller, to indicate
1858 * that the caller should successfully complete this SCSI command.
1861 * spin_lock_irqsave(host lock)
1864 unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1865 unsigned int buflen)
1872 * ata_msense_push - Push data onto MODE SENSE data output buffer
1873 * @ptr_io: (input/output) Location to store more output data
1874 * @last: End of output data buffer
1875 * @buf: Pointer to BLOB being added to output buffer
1876 * @buflen: Length of BLOB
1878 * Store MODE SENSE data on an output buffer.
1884 static void ata_msense_push(u8 **ptr_io, const u8 *last,
1885 const u8 *buf, unsigned int buflen)
1889 if ((ptr + buflen - 1) > last)
1892 memcpy(ptr, buf, buflen);
1900 * ata_msense_caching - Simulate MODE SENSE caching info page
1901 * @id: device IDENTIFY data
1902 * @ptr_io: (input/output) Location to store more output data
1903 * @last: End of output data buffer
1905 * Generate a caching info page, which conditionally indicates
1906 * write caching to the SCSI layer, depending on device
1913 static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1916 u8 page[CACHE_MPAGE_LEN];
1918 memcpy(page, def_cache_mpage, sizeof(page));
1919 if (ata_id_wcache_enabled(id))
1920 page[2] |= (1 << 2); /* write cache enable */
1921 if (!ata_id_rahead_enabled(id))
1922 page[12] |= (1 << 5); /* disable read ahead */
1924 ata_msense_push(ptr_io, last, page, sizeof(page));
1925 return sizeof(page);
1929 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1930 * @dev: Device associated with this MODE SENSE command
1931 * @ptr_io: (input/output) Location to store more output data
1932 * @last: End of output data buffer
1934 * Generate a generic MODE SENSE control mode page.
1940 static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1942 ata_msense_push(ptr_io, last, def_control_mpage,
1943 sizeof(def_control_mpage));
1944 return sizeof(def_control_mpage);
1948 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1949 * @dev: Device associated with this MODE SENSE command
1950 * @ptr_io: (input/output) Location to store more output data
1951 * @last: End of output data buffer
1953 * Generate a generic MODE SENSE r/w error recovery page.
1959 static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1962 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1963 sizeof(def_rw_recovery_mpage));
1964 return sizeof(def_rw_recovery_mpage);
1968 * We can turn this into a real blacklist if it's needed, for now just
1969 * blacklist any Maxtor BANC1G10 revision firmware
1971 static int ata_dev_supports_fua(u16 *id)
1973 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
1977 if (!ata_id_has_fua(id))
1980 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
1981 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
1983 if (strcmp(model, "Maxtor"))
1985 if (strcmp(fw, "BANC1G10"))
1988 return 0; /* blacklisted */
1992 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1993 * @args: device IDENTIFY data / SCSI command of interest.
1994 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1995 * @buflen: Response buffer length.
1997 * Simulate MODE SENSE commands. Assume this is invoked for direct
1998 * access devices (e.g. disks) only. There should be no block
1999 * descriptor for other device types.
2002 * spin_lock_irqsave(host lock)
2005 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
2006 unsigned int buflen)
2008 struct ata_device *dev = args->dev;
2009 u8 *scsicmd = args->cmd->cmnd, *p, *last;
2010 const u8 sat_blk_desc[] = {
2011 0, 0, 0, 0, /* number of blocks: sat unspecified */
2013 0, 0x2, 0x0 /* block length: 512 bytes */
2016 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
2021 six_byte = (scsicmd[0] == MODE_SENSE);
2022 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2024 * LLBA bit in msense(10) ignored (compliant)
2027 page_control = scsicmd[2] >> 6;
2028 switch (page_control) {
2029 case 0: /* current */
2030 break; /* supported */
2032 goto saving_not_supp;
2033 case 1: /* changeable */
2034 case 2: /* defaults */
2040 output_len = 4 + (ebd ? 8 : 0);
2041 alloc_len = scsicmd[4];
2043 output_len = 8 + (ebd ? 8 : 0);
2044 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2046 minlen = (alloc_len < buflen) ? alloc_len : buflen;
2048 p = rbuf + output_len;
2049 last = rbuf + minlen - 1;
2051 pg = scsicmd[2] & 0x3f;
2054 * No mode subpages supported (yet) but asking for _all_
2055 * subpages may be valid
2057 if (spg && (spg != ALL_SUB_MPAGES))
2061 case RW_RECOVERY_MPAGE:
2062 output_len += ata_msense_rw_recovery(&p, last);
2066 output_len += ata_msense_caching(args->id, &p, last);
2069 case CONTROL_MPAGE: {
2070 output_len += ata_msense_ctl_mode(&p, last);
2075 output_len += ata_msense_rw_recovery(&p, last);
2076 output_len += ata_msense_caching(args->id, &p, last);
2077 output_len += ata_msense_ctl_mode(&p, last);
2080 default: /* invalid page code */
2088 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2089 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2094 rbuf[0] = output_len;
2099 rbuf[3] = sizeof(sat_blk_desc);
2101 memcpy(rbuf + 4, sat_blk_desc,
2102 sizeof(sat_blk_desc));
2106 rbuf[0] = output_len >> 8;
2108 rbuf[1] = output_len;
2113 rbuf[7] = sizeof(sat_blk_desc);
2115 memcpy(rbuf + 8, sat_blk_desc,
2116 sizeof(sat_blk_desc));
2122 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2123 /* "Invalid field in cbd" */
2127 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2128 /* "Saving parameters not supported" */
2133 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2134 * @args: device IDENTIFY data / SCSI command of interest.
2135 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2136 * @buflen: Response buffer length.
2138 * Simulate READ CAPACITY commands.
2143 unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2144 unsigned int buflen)
2146 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
2150 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2151 if (last_lba >= 0xffffffffULL)
2152 last_lba = 0xffffffff;
2154 /* sector count, 32-bit */
2155 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3));
2156 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2));
2157 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1));
2158 ATA_SCSI_RBUF_SET(3, last_lba);
2161 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8);
2162 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE);
2164 /* sector count, 64-bit */
2165 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7));
2166 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6));
2167 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5));
2168 ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4));
2169 ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3));
2170 ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2));
2171 ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1));
2172 ATA_SCSI_RBUF_SET(7, last_lba);
2175 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8);
2176 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE);
2183 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2184 * @args: device IDENTIFY data / SCSI command of interest.
2185 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2186 * @buflen: Response buffer length.
2188 * Simulate REPORT LUNS command.
2191 * spin_lock_irqsave(host lock)
2194 unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2195 unsigned int buflen)
2198 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2204 * ata_scsi_set_sense - Set SCSI sense data and status
2205 * @cmd: SCSI request to be handled
2206 * @sk: SCSI-defined sense key
2207 * @asc: SCSI-defined additional sense code
2208 * @ascq: SCSI-defined additional sense code qualifier
2210 * Helper function that builds a valid fixed format, current
2211 * response code and the given sense key (sk), additional sense
2212 * code (asc) and additional sense code qualifier (ascq) with
2213 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2214 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2220 void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2222 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2224 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2225 cmd->sense_buffer[2] = sk;
2226 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2227 cmd->sense_buffer[12] = asc;
2228 cmd->sense_buffer[13] = ascq;
2232 * ata_scsi_badcmd - End a SCSI request with an error
2233 * @cmd: SCSI request to be handled
2234 * @done: SCSI command completion function
2235 * @asc: SCSI-defined additional sense code
2236 * @ascq: SCSI-defined additional sense code qualifier
2238 * Helper function that completes a SCSI command with
2239 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2240 * and the specified additional sense codes.
2243 * spin_lock_irqsave(host lock)
2246 void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2249 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
2254 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2256 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2257 /* FIXME: not quite right; we don't want the
2258 * translation of taskfile registers into
2259 * a sense descriptors, since that's only
2260 * correct for ATA, not ATAPI
2262 ata_gen_passthru_sense(qc);
2265 qc->scsidone(qc->scsicmd);
2269 /* is it pointless to prefer PIO for "safety reasons"? */
2270 static inline int ata_pio_use_silly(struct ata_port *ap)
2272 return (ap->flags & ATA_FLAG_PIO_DMA);
2275 static void atapi_request_sense(struct ata_queued_cmd *qc)
2277 struct ata_port *ap = qc->ap;
2278 struct scsi_cmnd *cmd = qc->scsicmd;
2280 DPRINTK("ATAPI request sense\n");
2282 /* FIXME: is this needed? */
2283 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2285 ap->ops->tf_read(ap, &qc->tf);
2287 /* fill these in, for the case where they are -not- overwritten */
2288 cmd->sense_buffer[0] = 0x70;
2289 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2293 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2294 qc->dma_dir = DMA_FROM_DEVICE;
2296 memset(&qc->cdb, 0, qc->dev->cdb_len);
2297 qc->cdb[0] = REQUEST_SENSE;
2298 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2300 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2301 qc->tf.command = ATA_CMD_PACKET;
2303 if (ata_pio_use_silly(ap)) {
2304 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2305 qc->tf.feature |= ATAPI_PKT_DMA;
2307 qc->tf.protocol = ATA_PROT_ATAPI;
2308 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2311 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2313 qc->complete_fn = atapi_sense_complete;
2320 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2322 struct scsi_cmnd *cmd = qc->scsicmd;
2323 unsigned int err_mask = qc->err_mask;
2325 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2327 /* handle completion from new EH */
2328 if (unlikely(qc->ap->ops->error_handler &&
2329 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2331 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2332 /* FIXME: not quite right; we don't want the
2333 * translation of taskfile registers into a
2334 * sense descriptors, since that's only
2335 * correct for ATA, not ATAPI
2337 ata_gen_passthru_sense(qc);
2340 /* SCSI EH automatically locks door if sdev->locked is
2341 * set. Sometimes door lock request continues to
2342 * fail, for example, when no media is present. This
2343 * creates a loop - SCSI EH issues door lock which
2344 * fails and gets invoked again to acquire sense data
2345 * for the failed command.
2347 * If door lock fails, always clear sdev->locked to
2348 * avoid this infinite loop.
2350 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2351 qc->dev->sdev->locked = 0;
2353 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2359 /* successful completion or old EH failure path */
2360 if (unlikely(err_mask & AC_ERR_DEV)) {
2361 cmd->result = SAM_STAT_CHECK_CONDITION;
2362 atapi_request_sense(qc);
2364 } else if (unlikely(err_mask)) {
2365 /* FIXME: not quite right; we don't want the
2366 * translation of taskfile registers into
2367 * a sense descriptors, since that's only
2368 * correct for ATA, not ATAPI
2370 ata_gen_passthru_sense(qc);
2372 u8 *scsicmd = cmd->cmnd;
2374 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2376 unsigned int buflen;
2378 buflen = ata_scsi_rbuf_get(cmd, &buf);
2380 /* ATAPI devices typically report zero for their SCSI version,
2381 * and sometimes deviate from the spec WRT response data
2382 * format. If SCSI version is reported as zero like normal,
2383 * then we make the following fixups: 1) Fake MMC-5 version,
2384 * to indicate to the Linux scsi midlayer this is a modern
2385 * device. 2) Ensure response data format / ATAPI information
2386 * are always correct.
2393 ata_scsi_rbuf_put(cmd, buf);
2396 cmd->result = SAM_STAT_GOOD;
2403 * atapi_xlat - Initialize PACKET taskfile
2404 * @qc: command structure to be initialized
2407 * spin_lock_irqsave(host lock)
2410 * Zero on success, non-zero on failure.
2412 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2414 struct scsi_cmnd *scmd = qc->scsicmd;
2415 struct ata_device *dev = qc->dev;
2416 int using_pio = (dev->flags & ATA_DFLAG_PIO);
2417 int nodata = (scmd->sc_data_direction == DMA_NONE);
2418 unsigned int nbytes;
2420 memset(qc->cdb, 0, dev->cdb_len);
2421 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2423 qc->complete_fn = atapi_qc_complete;
2425 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2426 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2427 qc->tf.flags |= ATA_TFLAG_WRITE;
2428 DPRINTK("direction: write\n");
2431 qc->tf.command = ATA_CMD_PACKET;
2432 qc->nbytes = scsi_bufflen(scmd);
2434 /* check whether ATAPI DMA is safe */
2435 if (!using_pio && ata_check_atapi_dma(qc))
2438 /* Some controller variants snoop this value for Packet transfers
2439 to do state machine and FIFO management. Thus we want to set it
2440 properly, and for DMA where it is effectively meaningless */
2441 nbytes = min(qc->nbytes, (unsigned int)63 * 1024);
2443 qc->tf.lbam = (nbytes & 0xFF);
2444 qc->tf.lbah = (nbytes >> 8);
2446 if (using_pio || nodata) {
2447 /* no data, or PIO data xfer */
2449 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2451 qc->tf.protocol = ATA_PROT_ATAPI;
2454 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2455 qc->tf.feature |= ATAPI_PKT_DMA;
2457 if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE))
2458 /* some SATA bridges need us to indicate data xfer direction */
2459 qc->tf.feature |= ATAPI_DMADIR;
2463 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2464 as ATAPI tape drives don't get this right otherwise */
2468 static struct ata_device * ata_find_dev(struct ata_port *ap, int devno)
2470 if (ap->nr_pmp_links == 0) {
2471 if (likely(devno < ata_link_max_devices(&ap->link)))
2472 return &ap->link.device[devno];
2474 if (likely(devno < ap->nr_pmp_links))
2475 return &ap->pmp_link[devno].device[0];
2481 static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
2482 const struct scsi_device *scsidev)
2486 /* skip commands not addressed to targets we simulate */
2487 if (ap->nr_pmp_links == 0) {
2488 if (unlikely(scsidev->channel || scsidev->lun))
2490 devno = scsidev->id;
2492 if (unlikely(scsidev->id || scsidev->lun))
2494 devno = scsidev->channel;
2497 return ata_find_dev(ap, devno);
2501 * ata_scsi_dev_enabled - determine if device is enabled
2504 * Determine if commands should be sent to the specified device.
2507 * spin_lock_irqsave(host lock)
2510 * 0 if commands are not allowed / 1 if commands are allowed
2513 static int ata_scsi_dev_enabled(struct ata_device *dev)
2515 if (unlikely(!ata_dev_enabled(dev)))
2518 if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) {
2519 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2520 ata_dev_printk(dev, KERN_WARNING,
2521 "WARNING: ATAPI is %s, device ignored.\n",
2522 atapi_enabled ? "not supported with this driver" : "disabled");
2531 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2532 * @ap: ATA port to which the device is attached
2533 * @scsidev: SCSI device from which we derive the ATA device
2535 * Given various information provided in struct scsi_cmnd,
2536 * map that onto an ATA bus, and using that mapping
2537 * determine which ata_device is associated with the
2538 * SCSI command to be sent.
2541 * spin_lock_irqsave(host lock)
2544 * Associated ATA device, or %NULL if not found.
2546 static struct ata_device *
2547 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2549 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2551 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
2558 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2559 * @byte1: Byte 1 from pass-thru CDB.
2562 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2565 ata_scsi_map_proto(u8 byte1)
2567 switch((byte1 & 0x1e) >> 1) {
2568 case 3: /* Non-data */
2569 return ATA_PROT_NODATA;
2572 case 10: /* UDMA Data-in */
2573 case 11: /* UDMA Data-Out */
2574 return ATA_PROT_DMA;
2576 case 4: /* PIO Data-in */
2577 case 5: /* PIO Data-out */
2578 return ATA_PROT_PIO;
2580 case 0: /* Hard Reset */
2582 case 8: /* Device Diagnostic */
2583 case 9: /* Device Reset */
2584 case 7: /* DMA Queued */
2585 case 12: /* FPDMA */
2586 case 15: /* Return Response Info */
2587 default: /* Reserved */
2591 return ATA_PROT_UNKNOWN;
2595 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2596 * @qc: command structure to be initialized
2598 * Handles either 12 or 16-byte versions of the CDB.
2601 * Zero on success, non-zero on failure.
2603 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2605 struct ata_taskfile *tf = &(qc->tf);
2606 struct scsi_cmnd *scmd = qc->scsicmd;
2607 struct ata_device *dev = qc->dev;
2608 const u8 *cdb = scmd->cmnd;
2610 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2613 /* We may not issue DMA commands if no DMA mode is set */
2614 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2618 * 12 and 16 byte CDBs use different offsets to
2619 * provide the various register values.
2621 if (cdb[0] == ATA_16) {
2623 * 16-byte CDB - may contain extended commands.
2625 * If that is the case, copy the upper byte register values.
2627 if (cdb[1] & 0x01) {
2628 tf->hob_feature = cdb[3];
2629 tf->hob_nsect = cdb[5];
2630 tf->hob_lbal = cdb[7];
2631 tf->hob_lbam = cdb[9];
2632 tf->hob_lbah = cdb[11];
2633 tf->flags |= ATA_TFLAG_LBA48;
2635 tf->flags &= ~ATA_TFLAG_LBA48;
2638 * Always copy low byte, device and command registers.
2640 tf->feature = cdb[4];
2645 tf->device = cdb[13];
2646 tf->command = cdb[14];
2649 * 12-byte CDB - incapable of extended commands.
2651 tf->flags &= ~ATA_TFLAG_LBA48;
2653 tf->feature = cdb[3];
2658 tf->device = cdb[8];
2659 tf->command = cdb[9];
2662 /* enforce correct master/slave bit */
2663 tf->device = dev->devno ?
2664 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2666 /* sanity check for pio multi commands */
2667 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2670 if (is_multi_taskfile(tf)) {
2671 unsigned int multi_count = 1 << (cdb[1] >> 5);
2673 /* compare the passed through multi_count
2674 * with the cached multi_count of libata
2676 if (multi_count != dev->multi_count)
2677 ata_dev_printk(dev, KERN_WARNING,
2678 "invalid multi_count %u ignored\n",
2682 /* READ/WRITE LONG use a non-standard sect_size */
2683 qc->sect_size = ATA_SECT_SIZE;
2684 switch (tf->command) {
2685 case ATA_CMD_READ_LONG:
2686 case ATA_CMD_READ_LONG_ONCE:
2687 case ATA_CMD_WRITE_LONG:
2688 case ATA_CMD_WRITE_LONG_ONCE:
2689 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2691 qc->sect_size = scsi_bufflen(scmd);
2695 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2696 * SET_FEATURES - XFER MODE must be preceded/succeeded
2697 * by an update to hardware-specific registers for each
2698 * controller (i.e. the reason for ->set_piomode(),
2699 * ->set_dmamode(), and ->post_set_mode() hooks).
2701 if ((tf->command == ATA_CMD_SET_FEATURES)
2702 && (tf->feature == SETFEATURES_XFER))
2706 * Set flags so that all registers will be written,
2707 * and pass on write indication (used for PIO/DMA
2710 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2712 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2713 tf->flags |= ATA_TFLAG_WRITE;
2716 * Set transfer length.
2718 * TODO: find out if we need to do more here to
2719 * cover scatter/gather case.
2721 qc->nbytes = scsi_bufflen(scmd);
2723 /* request result TF */
2724 qc->flags |= ATA_QCFLAG_RESULT_TF;
2729 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
2730 /* "Invalid field in cdb" */
2735 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2737 * @cmd: SCSI command opcode to consider
2739 * Look up the SCSI command given, and determine whether the
2740 * SCSI command is to be translated or simulated.
2743 * Pointer to translation function if possible, %NULL if not.
2746 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2756 return ata_scsi_rw_xlat;
2758 case SYNCHRONIZE_CACHE:
2759 if (ata_try_flush_cache(dev))
2760 return ata_scsi_flush_xlat;
2765 return ata_scsi_verify_xlat;
2769 return ata_scsi_pass_thru;
2772 return ata_scsi_start_stop_xlat;
2779 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2780 * @ap: ATA port to which the command was being sent
2781 * @cmd: SCSI command to dump
2783 * Prints the contents of a SCSI command via printk().
2786 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2787 struct scsi_cmnd *cmd)
2790 struct scsi_device *scsidev = cmd->device;
2791 u8 *scsicmd = cmd->cmnd;
2793 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2795 scsidev->channel, scsidev->id, scsidev->lun,
2796 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2797 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2802 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2803 void (*done)(struct scsi_cmnd *),
2804 struct ata_device *dev)
2806 u8 scsi_op = scmd->cmnd[0];
2807 ata_xlat_func_t xlat_func;
2810 if (dev->class == ATA_DEV_ATA) {
2811 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2814 xlat_func = ata_get_xlat_func(dev, scsi_op);
2816 if (unlikely(!scmd->cmd_len))
2820 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2821 /* relay SCSI command to ATAPI device */
2822 if (unlikely(scmd->cmd_len > dev->cdb_len))
2825 xlat_func = atapi_xlat;
2827 /* ATA_16 passthru, treat as an ATA command */
2828 if (unlikely(scmd->cmd_len > 16))
2831 xlat_func = ata_get_xlat_func(dev, scsi_op);
2836 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
2838 ata_scsi_simulate(dev, scmd, done);
2843 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
2844 scmd->cmd_len, scsi_op, dev->cdb_len);
2845 scmd->result = DID_ERROR << 16;
2851 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2852 * @cmd: SCSI command to be sent
2853 * @done: Completion function, called when command is complete
2855 * In some cases, this function translates SCSI commands into
2856 * ATA taskfiles, and queues the taskfiles to be sent to
2857 * hardware. In other cases, this function simulates a
2858 * SCSI device by evaluating and responding to certain
2859 * SCSI commands. This creates the overall effect of
2860 * ATA and ATAPI devices appearing as SCSI devices.
2863 * Releases scsi-layer-held lock, and obtains host lock.
2866 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2869 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2871 struct ata_port *ap;
2872 struct ata_device *dev;
2873 struct scsi_device *scsidev = cmd->device;
2874 struct Scsi_Host *shost = scsidev->host;
2877 ap = ata_shost_to_port(shost);
2879 spin_unlock(shost->host_lock);
2880 spin_lock(ap->lock);
2882 ata_scsi_dump_cdb(ap, cmd);
2884 dev = ata_scsi_find_dev(ap, scsidev);
2886 rc = __ata_scsi_queuecmd(cmd, done, dev);
2888 cmd->result = (DID_BAD_TARGET << 16);
2892 spin_unlock(ap->lock);
2893 spin_lock(shost->host_lock);
2898 * ata_scsi_simulate - simulate SCSI command on ATA device
2899 * @dev: the target device
2900 * @cmd: SCSI command being sent to device.
2901 * @done: SCSI command completion function.
2903 * Interprets and directly executes a select list of SCSI commands
2904 * that can be handled internally.
2907 * spin_lock_irqsave(host lock)
2910 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
2911 void (*done)(struct scsi_cmnd *))
2913 struct ata_scsi_args args;
2914 const u8 *scsicmd = cmd->cmnd;
2922 switch(scsicmd[0]) {
2923 /* TODO: worth improving? */
2925 ata_scsi_invalid_field(cmd, done);
2929 if (scsicmd[1] & 2) /* is CmdDt set? */
2930 ata_scsi_invalid_field(cmd, done);
2931 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2932 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2933 else switch (scsicmd[2]) {
2935 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2938 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2941 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2944 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
2947 ata_scsi_invalid_field(cmd, done);
2954 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2957 case MODE_SELECT: /* unconditionally return */
2958 case MODE_SELECT_10: /* bad-field-in-cdb */
2959 ata_scsi_invalid_field(cmd, done);
2963 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2966 case SERVICE_ACTION_IN:
2967 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2968 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2970 ata_scsi_invalid_field(cmd, done);
2974 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2978 ata_scsi_set_sense(cmd, 0, 0, 0);
2979 cmd->result = (DRIVER_SENSE << 24);
2983 /* if we reach this, then writeback caching is disabled,
2984 * turning this into a no-op.
2986 case SYNCHRONIZE_CACHE:
2989 /* no-op's, complete with success */
2993 case TEST_UNIT_READY:
2994 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2997 case SEND_DIAGNOSTIC:
2998 tmp8 = scsicmd[1] & ~(1 << 3);
2999 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3000 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3002 ata_scsi_invalid_field(cmd, done);
3005 /* all other commands */
3007 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3008 /* "Invalid command operation code" */
3014 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3018 for (i = 0; i < host->n_ports; i++) {
3019 struct ata_port *ap = host->ports[i];
3020 struct Scsi_Host *shost;
3023 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3027 *(struct ata_port **)&shost->hostdata[0] = ap;
3028 ap->scsi_host = shost;
3030 shost->transportt = &ata_scsi_transport_template;
3031 shost->unique_id = ap->print_id;
3034 shost->max_channel = 1;
3035 shost->max_cmd_len = 16;
3037 /* Schedule policy is determined by ->qc_defer()
3038 * callback and it needs to see every deferred qc.
3039 * Set host_blocked to 1 to prevent SCSI midlayer from
3040 * automatically deferring requests.
3042 shost->max_host_blocked = 1;
3044 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3052 scsi_host_put(host->ports[i]->scsi_host);
3055 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3057 scsi_remove_host(shost);
3058 scsi_host_put(shost);
3063 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3066 struct ata_device *last_failed_dev = NULL;
3067 struct ata_link *link;
3068 struct ata_device *dev;
3070 if (ap->flags & ATA_FLAG_DISABLED)
3074 ata_port_for_each_link(link, ap) {
3075 ata_link_for_each_dev(dev, link) {
3076 struct scsi_device *sdev;
3077 int channel = 0, id = 0;
3079 if (!ata_dev_enabled(dev) || dev->sdev)
3082 if (ata_is_host_link(link))
3085 channel = link->pmp;
3087 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3089 if (!IS_ERR(sdev)) {
3091 scsi_device_put(sdev);
3096 /* If we scanned while EH was in progress or allocation
3097 * failure occurred, scan would have failed silently. Check
3098 * whether all devices are attached.
3100 ata_port_for_each_link(link, ap) {
3101 ata_link_for_each_dev(dev, link) {
3102 if (ata_dev_enabled(dev) && !dev->sdev)
3110 /* we're missing some SCSI devices */
3112 /* If caller requested synchrnous scan && we've made
3113 * any progress, sleep briefly and repeat.
3115 if (dev != last_failed_dev) {
3117 last_failed_dev = dev;
3121 /* We might be failing to detect boot device, give it
3122 * a few more chances.
3129 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3130 "failed without making any progress,\n"
3131 " switching to async\n");
3134 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3135 round_jiffies_relative(HZ));
3139 * ata_scsi_offline_dev - offline attached SCSI device
3140 * @dev: ATA device to offline attached SCSI device for
3142 * This function is called from ata_eh_hotplug() and responsible
3143 * for taking the SCSI device attached to @dev offline. This
3144 * function is called with host lock which protects dev->sdev
3148 * spin_lock_irqsave(host lock)
3151 * 1 if attached SCSI device exists, 0 otherwise.
3153 int ata_scsi_offline_dev(struct ata_device *dev)
3156 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3163 * ata_scsi_remove_dev - remove attached SCSI device
3164 * @dev: ATA device to remove attached SCSI device for
3166 * This function is called from ata_eh_scsi_hotplug() and
3167 * responsible for removing the SCSI device attached to @dev.
3170 * Kernel thread context (may sleep).
3172 static void ata_scsi_remove_dev(struct ata_device *dev)
3174 struct ata_port *ap = dev->link->ap;
3175 struct scsi_device *sdev;
3176 unsigned long flags;
3178 /* Alas, we need to grab scan_mutex to ensure SCSI device
3179 * state doesn't change underneath us and thus
3180 * scsi_device_get() always succeeds. The mutex locking can
3181 * be removed if there is __scsi_device_get() interface which
3182 * increments reference counts regardless of device state.
3184 mutex_lock(&ap->scsi_host->scan_mutex);
3185 spin_lock_irqsave(ap->lock, flags);
3187 /* clearing dev->sdev is protected by host lock */
3192 /* If user initiated unplug races with us, sdev can go
3193 * away underneath us after the host lock and
3194 * scan_mutex are released. Hold onto it.
3196 if (scsi_device_get(sdev) == 0) {
3197 /* The following ensures the attached sdev is
3198 * offline on return from ata_scsi_offline_dev()
3199 * regardless it wins or loses the race
3200 * against this function.
3202 scsi_device_set_state(sdev, SDEV_OFFLINE);
3209 spin_unlock_irqrestore(ap->lock, flags);
3210 mutex_unlock(&ap->scsi_host->scan_mutex);
3213 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3214 sdev->sdev_gendev.bus_id);
3216 scsi_remove_device(sdev);
3217 scsi_device_put(sdev);
3221 static void ata_scsi_handle_link_detach(struct ata_link *link)
3223 struct ata_port *ap = link->ap;
3224 struct ata_device *dev;
3226 ata_link_for_each_dev(dev, link) {
3227 unsigned long flags;
3229 if (!(dev->flags & ATA_DFLAG_DETACHED))
3232 spin_lock_irqsave(ap->lock, flags);
3233 dev->flags &= ~ATA_DFLAG_DETACHED;
3234 spin_unlock_irqrestore(ap->lock, flags);
3236 ata_scsi_remove_dev(dev);
3241 * ata_scsi_media_change_notify - send media change event
3242 * @atadev: Pointer to the disk device with media change event
3244 * Tell the block layer to send a media change notification
3248 * spin_lock_irqsave(host lock)
3250 void ata_scsi_media_change_notify(struct ata_device *dev)
3252 #ifdef OTHER_AN_PATCHES_HAVE_BEEN_APPLIED
3254 scsi_device_event_notify(dev->sdev, SDEV_MEDIA_CHANGE);
3259 * ata_scsi_hotplug - SCSI part of hotplug
3260 * @work: Pointer to ATA port to perform SCSI hotplug on
3262 * Perform SCSI part of hotplug. It's executed from a separate
3263 * workqueue after EH completes. This is necessary because SCSI
3264 * hot plugging requires working EH and hot unplugging is
3265 * synchronized with hot plugging with a mutex.
3268 * Kernel thread context (may sleep).
3270 void ata_scsi_hotplug(struct work_struct *work)
3272 struct ata_port *ap =
3273 container_of(work, struct ata_port, hotplug_task.work);
3276 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3277 DPRINTK("ENTER/EXIT - unloading\n");
3283 /* Unplug detached devices. We cannot use link iterator here
3284 * because PMP links have to be scanned even if PMP is
3285 * currently not attached. Iterate manually.
3287 ata_scsi_handle_link_detach(&ap->link);
3289 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3290 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3292 /* scan for new ones */
3293 ata_scsi_scan_host(ap, 0);
3299 * ata_scsi_user_scan - indication for user-initiated bus scan
3300 * @shost: SCSI host to scan
3301 * @channel: Channel to scan
3305 * This function is called when user explicitly requests bus
3306 * scan. Set probe pending flag and invoke EH.
3309 * SCSI layer (we don't care)
3314 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3315 unsigned int id, unsigned int lun)
3317 struct ata_port *ap = ata_shost_to_port(shost);
3318 unsigned long flags;
3321 if (!ap->ops->error_handler)
3324 if (lun != SCAN_WILD_CARD && lun)
3327 if (ap->nr_pmp_links == 0) {
3328 if (channel != SCAN_WILD_CARD && channel)
3332 if (id != SCAN_WILD_CARD && id)
3337 spin_lock_irqsave(ap->lock, flags);
3339 if (devno == SCAN_WILD_CARD) {
3340 struct ata_link *link;
3342 ata_port_for_each_link(link, ap) {
3343 struct ata_eh_info *ehi = &link->eh_info;
3344 ehi->probe_mask |= (1 << ata_link_max_devices(link)) - 1;
3345 ehi->action |= ATA_EH_SOFTRESET;
3348 struct ata_device *dev = ata_find_dev(ap, devno);
3351 struct ata_eh_info *ehi = &dev->link->eh_info;
3352 ehi->probe_mask |= 1 << dev->devno;
3353 ehi->action |= ATA_EH_SOFTRESET;
3354 ehi->flags |= ATA_EHI_RESUME_LINK;
3360 ata_port_schedule_eh(ap);
3361 spin_unlock_irqrestore(ap->lock, flags);
3362 ata_port_wait_eh(ap);
3364 spin_unlock_irqrestore(ap->lock, flags);
3370 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3371 * @work: Pointer to ATA port to perform scsi_rescan_device()
3373 * After ATA pass thru (SAT) commands are executed successfully,
3374 * libata need to propagate the changes to SCSI layer. This
3375 * function must be executed from ata_aux_wq such that sdev
3376 * attach/detach don't race with rescan.
3379 * Kernel thread context (may sleep).
3381 void ata_scsi_dev_rescan(struct work_struct *work)
3383 struct ata_port *ap =
3384 container_of(work, struct ata_port, scsi_rescan_task);
3385 struct ata_link *link;
3386 struct ata_device *dev;
3387 unsigned long flags;
3389 spin_lock_irqsave(ap->lock, flags);
3391 ata_port_for_each_link(link, ap) {
3392 ata_link_for_each_dev(dev, link) {
3393 struct scsi_device *sdev = dev->sdev;
3395 if (!ata_dev_enabled(dev) || !sdev)
3397 if (scsi_device_get(sdev))
3400 spin_unlock_irqrestore(ap->lock, flags);
3401 scsi_rescan_device(&(sdev->sdev_gendev));
3402 scsi_device_put(sdev);
3403 spin_lock_irqsave(ap->lock, flags);
3407 spin_unlock_irqrestore(ap->lock, flags);
3411 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3412 * @host: ATA host container for all SAS ports
3413 * @port_info: Information from low-level host driver
3414 * @shost: SCSI host that the scsi device is attached to
3417 * PCI/etc. bus probe sem.
3420 * ata_port pointer on success / NULL on failure.
3423 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3424 struct ata_port_info *port_info,
3425 struct Scsi_Host *shost)
3427 struct ata_port *ap;
3429 ap = ata_port_alloc(host);
3434 ap->lock = shost->host_lock;
3435 ap->pio_mask = port_info->pio_mask;
3436 ap->mwdma_mask = port_info->mwdma_mask;
3437 ap->udma_mask = port_info->udma_mask;
3438 ap->flags |= port_info->flags;
3439 ap->ops = port_info->port_ops;
3440 ap->cbl = ATA_CBL_SATA;
3444 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3447 * ata_sas_port_start - Set port up for dma.
3448 * @ap: Port to initialize
3450 * Called just after data structures for each port are
3451 * initialized. Allocates DMA pad.
3453 * May be used as the port_start() entry in ata_port_operations.
3456 * Inherited from caller.
3458 int ata_sas_port_start(struct ata_port *ap)
3460 return ata_pad_alloc(ap, ap->dev);
3462 EXPORT_SYMBOL_GPL(ata_sas_port_start);
3465 * ata_port_stop - Undo ata_sas_port_start()
3466 * @ap: Port to shut down
3468 * Frees the DMA pad.
3470 * May be used as the port_stop() entry in ata_port_operations.
3473 * Inherited from caller.
3476 void ata_sas_port_stop(struct ata_port *ap)
3478 ata_pad_free(ap, ap->dev);
3480 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3483 * ata_sas_port_init - Initialize a SATA device
3484 * @ap: SATA port to initialize
3487 * PCI/etc. bus probe sem.
3490 * Zero on success, non-zero on error.
3493 int ata_sas_port_init(struct ata_port *ap)
3495 int rc = ap->ops->port_start(ap);
3498 ap->print_id = ata_print_id++;
3499 rc = ata_bus_probe(ap);
3504 EXPORT_SYMBOL_GPL(ata_sas_port_init);
3507 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3508 * @ap: SATA port to destroy
3512 void ata_sas_port_destroy(struct ata_port *ap)
3514 if (ap->ops->port_stop)
3515 ap->ops->port_stop(ap);
3518 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3521 * ata_sas_slave_configure - Default slave_config routine for libata devices
3522 * @sdev: SCSI device to configure
3523 * @ap: ATA port to which SCSI device is attached
3529 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3531 ata_scsi_sdev_config(sdev);
3532 ata_scsi_dev_config(sdev, ap->link.device);
3535 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3538 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3539 * @cmd: SCSI command to be sent
3540 * @done: Completion function, called when command is complete
3541 * @ap: ATA port to which the command is being sent
3544 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3548 int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3549 struct ata_port *ap)
3553 ata_scsi_dump_cdb(ap, cmd);
3555 if (likely(ata_scsi_dev_enabled(ap->link.device)))
3556 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
3558 cmd->result = (DID_BAD_TARGET << 16);
3563 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);