2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/kernel.h>
37 #include <linux/blkdev.h>
38 #include <linux/spinlock.h>
39 #include <scsi/scsi.h>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_cmnd.h>
42 #include <scsi/scsi_eh.h>
43 #include <scsi/scsi_device.h>
44 #include <scsi/scsi_tcq.h>
45 #include <scsi/scsi_transport.h>
46 #include <linux/libata.h>
47 #include <linux/hdreg.h>
48 #include <linux/uaccess.h>
52 #define SECTOR_SIZE 512
54 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
56 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
57 const struct scsi_device *scsidev);
58 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
59 const struct scsi_device *scsidev);
60 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
61 unsigned int id, unsigned int lun);
64 #define RW_RECOVERY_MPAGE 0x1
65 #define RW_RECOVERY_MPAGE_LEN 12
66 #define CACHE_MPAGE 0x8
67 #define CACHE_MPAGE_LEN 20
68 #define CONTROL_MPAGE 0xa
69 #define CONTROL_MPAGE_LEN 12
70 #define ALL_MPAGES 0x3f
71 #define ALL_SUB_MPAGES 0xff
74 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
76 RW_RECOVERY_MPAGE_LEN - 2,
78 0, /* read retry count */
80 0, /* write retry count */
84 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
87 0, /* contains WCE, needs to be 0 for logic */
88 0, 0, 0, 0, 0, 0, 0, 0, 0,
89 0, /* contains DRA, needs to be 0 for logic */
93 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
95 CONTROL_MPAGE_LEN - 2,
96 2, /* DSENSE=0, GLTSD=1 */
97 0, /* [QAM+QERR may be 1, see 05-359r1] */
98 0, 0, 0, 0, 0xff, 0xff,
99 0, 30 /* extended self test time, see 05-359r1 */
103 * libata transport template. libata doesn't do real transport stuff.
104 * It just needs the eh_timed_out hook.
106 static struct scsi_transport_template ata_scsi_transport_template = {
107 .eh_strategy_handler = ata_scsi_error,
108 .eh_timed_out = ata_scsi_timed_out,
109 .user_scan = ata_scsi_user_scan,
113 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
114 void (*done)(struct scsi_cmnd *))
116 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
117 /* "Invalid field in cbd" */
122 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
123 * @sdev: SCSI device for which BIOS geometry is to be determined
124 * @bdev: block device associated with @sdev
125 * @capacity: capacity of SCSI device
126 * @geom: location to which geometry will be output
128 * Generic bios head/sector/cylinder calculator
129 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
130 * mapping. Some situations may arise where the disk is not
131 * bootable if this is not used.
134 * Defined by the SCSI layer. We don't really care.
139 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
140 sector_t capacity, int geom[])
144 sector_div(capacity, 255*63);
151 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
152 * @sdev: SCSI device to get identify data for
153 * @arg: User buffer area for identify data
156 * Defined by the SCSI layer. We don't really care.
159 * Zero on success, negative errno on error.
161 static int ata_get_identity(struct scsi_device *sdev, void __user *arg)
163 struct ata_port *ap = ata_shost_to_port(sdev->host);
164 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
165 u16 __user *dst = arg;
171 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
174 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
175 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
178 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
179 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
182 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
183 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
190 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
191 * @scsidev: Device to which we are issuing command
192 * @arg: User provided data for issuing command
195 * Defined by the SCSI layer. We don't really care.
198 * Zero on success, negative errno on error.
200 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
203 u8 scsi_cmd[MAX_COMMAND_SIZE];
204 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
206 enum dma_data_direction data_dir;
212 if (copy_from_user(args, arg, sizeof(args)))
215 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
219 memset(scsi_cmd, 0, sizeof(scsi_cmd));
222 argsize = SECTOR_SIZE * args[3];
223 argbuf = kmalloc(argsize, GFP_KERNEL);
224 if (argbuf == NULL) {
229 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
230 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
231 block count in sector count field */
232 data_dir = DMA_FROM_DEVICE;
234 scsi_cmd[1] = (3 << 1); /* Non-data */
235 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
239 scsi_cmd[0] = ATA_16;
241 scsi_cmd[4] = args[2];
242 if (args[0] == WIN_SMART) { /* hack -- ide driver does this too... */
243 scsi_cmd[6] = args[3];
244 scsi_cmd[8] = args[1];
248 scsi_cmd[6] = args[1];
250 scsi_cmd[14] = args[0];
252 /* Good values for timeout and retries? Values below
253 from scsi_ioctl_send_command() for default case... */
254 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
255 sensebuf, (10*HZ), 5, 0);
257 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
258 u8 *desc = sensebuf + 8;
259 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
261 /* If we set cc then ATA pass-through will cause a
262 * check condition even if no error. Filter that. */
263 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
264 struct scsi_sense_hdr sshdr;
265 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
267 if (sshdr.sense_key == 0 &&
268 sshdr.asc == 0 && sshdr.ascq == 0)
269 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
272 /* Send userspace a few ATA registers (same as drivers/ide) */
273 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
274 desc[0] == 0x09) { /* code is "ATA Descriptor" */
275 args[0] = desc[13]; /* status */
276 args[1] = desc[3]; /* error */
277 args[2] = desc[5]; /* sector count (0:7) */
278 if (copy_to_user(arg, args, sizeof(args)))
290 && copy_to_user(arg + sizeof(args), argbuf, argsize))
299 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
300 * @scsidev: Device to which we are issuing command
301 * @arg: User provided data for issuing command
304 * Defined by the SCSI layer. We don't really care.
307 * Zero on success, negative errno on error.
309 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
312 u8 scsi_cmd[MAX_COMMAND_SIZE];
313 u8 args[7], *sensebuf = NULL;
319 if (copy_from_user(args, arg, sizeof(args)))
322 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
326 memset(scsi_cmd, 0, sizeof(scsi_cmd));
327 scsi_cmd[0] = ATA_16;
328 scsi_cmd[1] = (3 << 1); /* Non-data */
329 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
330 scsi_cmd[4] = args[1];
331 scsi_cmd[6] = args[2];
332 scsi_cmd[8] = args[3];
333 scsi_cmd[10] = args[4];
334 scsi_cmd[12] = args[5];
335 scsi_cmd[13] = args[6] & 0x4f;
336 scsi_cmd[14] = args[0];
338 /* Good values for timeout and retries? Values below
339 from scsi_ioctl_send_command() for default case... */
340 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
341 sensebuf, (10*HZ), 5, 0);
343 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
344 u8 *desc = sensebuf + 8;
345 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
347 /* If we set cc then ATA pass-through will cause a
348 * check condition even if no error. Filter that. */
349 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
350 struct scsi_sense_hdr sshdr;
351 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
353 if (sshdr.sense_key == 0 &&
354 sshdr.asc == 0 && sshdr.ascq == 0)
355 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
358 /* Send userspace ATA registers */
359 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
360 desc[0] == 0x09) {/* code is "ATA Descriptor" */
361 args[0] = desc[13]; /* status */
362 args[1] = desc[3]; /* error */
363 args[2] = desc[5]; /* sector count (0:7) */
364 args[3] = desc[7]; /* lbal */
365 args[4] = desc[9]; /* lbam */
366 args[5] = desc[11]; /* lbah */
367 args[6] = desc[12]; /* select */
368 if (copy_to_user(arg, args, sizeof(args)))
383 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
385 int val = -EINVAL, rc = -EINVAL;
388 case ATA_IOC_GET_IO32:
390 if (copy_to_user(arg, &val, 1))
394 case ATA_IOC_SET_IO32:
395 val = (unsigned long) arg;
400 case HDIO_GET_IDENTITY:
401 return ata_get_identity(scsidev, arg);
404 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
406 return ata_cmd_ioctl(scsidev, arg);
408 case HDIO_DRIVE_TASK:
409 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
411 return ata_task_ioctl(scsidev, arg);
422 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
423 * @dev: ATA device to which the new command is attached
424 * @cmd: SCSI command that originated this ATA command
425 * @done: SCSI command completion function
427 * Obtain a reference to an unused ata_queued_cmd structure,
428 * which is the basic libata structure representing a single
429 * ATA command sent to the hardware.
431 * If a command was available, fill in the SCSI-specific
432 * portions of the structure with information on the
436 * spin_lock_irqsave(host lock)
439 * Command allocated, or %NULL if none available.
441 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
442 struct scsi_cmnd *cmd,
443 void (*done)(struct scsi_cmnd *))
445 struct ata_queued_cmd *qc;
447 qc = ata_qc_new_init(dev);
452 qc->__sg = scsi_sglist(cmd);
453 qc->n_elem = scsi_sg_count(cmd);
455 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
463 * ata_dump_status - user friendly display of error info
464 * @id: id of the port in question
465 * @tf: ptr to filled out taskfile
467 * Decode and dump the ATA error/status registers for the user so
468 * that they have some idea what really happened at the non
469 * make-believe layer.
472 * inherited from caller
474 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
476 u8 stat = tf->command, err = tf->feature;
478 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
479 if (stat & ATA_BUSY) {
480 printk("Busy }\n"); /* Data is not valid in this case */
482 if (stat & 0x40) printk("DriveReady ");
483 if (stat & 0x20) printk("DeviceFault ");
484 if (stat & 0x10) printk("SeekComplete ");
485 if (stat & 0x08) printk("DataRequest ");
486 if (stat & 0x04) printk("CorrectedError ");
487 if (stat & 0x02) printk("Index ");
488 if (stat & 0x01) printk("Error ");
492 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
493 if (err & 0x04) printk("DriveStatusError ");
495 if (err & 0x04) printk("BadCRC ");
496 else printk("Sector ");
498 if (err & 0x40) printk("UncorrectableError ");
499 if (err & 0x10) printk("SectorIdNotFound ");
500 if (err & 0x02) printk("TrackZeroNotFound ");
501 if (err & 0x01) printk("AddrMarkNotFound ");
508 * ata_to_sense_error - convert ATA error to SCSI error
509 * @id: ATA device number
510 * @drv_stat: value contained in ATA status register
511 * @drv_err: value contained in ATA error register
512 * @sk: the sense key we'll fill out
513 * @asc: the additional sense code we'll fill out
514 * @ascq: the additional sense code qualifier we'll fill out
515 * @verbose: be verbose
517 * Converts an ATA error into a SCSI error. Fill out pointers to
518 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
519 * format sense blocks.
522 * spin_lock_irqsave(host lock)
524 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
525 u8 *asc, u8 *ascq, int verbose)
529 /* Based on the 3ware driver translation table */
530 static const unsigned char sense_table[][4] = {
532 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
534 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
536 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
537 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
538 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
539 /* MC|ID|ABRT|TRK0|MARK */
540 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
542 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
543 /* Bad address mark */
544 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
546 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
548 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
549 /* Media change request */
550 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
552 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
554 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
556 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
557 /* BBD - block marked bad */
558 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
559 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
561 static const unsigned char stat_table[][4] = {
562 /* Must be first because BUSY means no other bits valid */
563 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
564 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
565 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
566 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
567 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
571 * Is this an error we can process/parse
573 if (drv_stat & ATA_BUSY) {
574 drv_err = 0; /* Ignore the err bits, they're invalid */
578 /* Look for drv_err */
579 for (i = 0; sense_table[i][0] != 0xFF; i++) {
580 /* Look for best matches first */
581 if ((sense_table[i][0] & drv_err) ==
583 *sk = sense_table[i][1];
584 *asc = sense_table[i][2];
585 *ascq = sense_table[i][3];
589 /* No immediate match */
591 printk(KERN_WARNING "ata%u: no sense translation for "
592 "error 0x%02x\n", id, drv_err);
595 /* Fall back to interpreting status bits */
596 for (i = 0; stat_table[i][0] != 0xFF; i++) {
597 if (stat_table[i][0] & drv_stat) {
598 *sk = stat_table[i][1];
599 *asc = stat_table[i][2];
600 *ascq = stat_table[i][3];
604 /* No error? Undecoded? */
606 printk(KERN_WARNING "ata%u: no sense translation for "
607 "status: 0x%02x\n", id, drv_stat);
609 /* We need a sensible error return here, which is tricky, and one
610 that won't cause people to do things like return a disk wrongly */
611 *sk = ABORTED_COMMAND;
617 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
618 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
619 id, drv_stat, drv_err, *sk, *asc, *ascq);
624 * ata_gen_passthru_sense - Generate check condition sense block.
625 * @qc: Command that completed.
627 * This function is specific to the ATA descriptor format sense
628 * block specified for the ATA pass through commands. Regardless
629 * of whether the command errored or not, return a sense
630 * block. Copy all controller registers into the sense
631 * block. Clear sense key, ASC & ASCQ if there is no error.
636 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
638 struct scsi_cmnd *cmd = qc->scsicmd;
639 struct ata_taskfile *tf = &qc->result_tf;
640 unsigned char *sb = cmd->sense_buffer;
641 unsigned char *desc = sb + 8;
642 int verbose = qc->ap->ops->error_handler == NULL;
644 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
646 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
649 * Use ata_to_sense_error() to map status register bits
650 * onto sense key, asc & ascq.
653 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
654 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
655 &sb[1], &sb[2], &sb[3], verbose);
660 * Sense data is current and format is descriptor.
666 /* set length of additional sense data */
671 * Copy registers into sense buffer.
674 desc[3] = tf->feature; /* == error reg */
679 desc[12] = tf->device;
680 desc[13] = tf->command; /* == status reg */
683 * Fill in Extend bit, and the high order bytes
686 if (tf->flags & ATA_TFLAG_LBA48) {
688 desc[4] = tf->hob_nsect;
689 desc[6] = tf->hob_lbal;
690 desc[8] = tf->hob_lbam;
691 desc[10] = tf->hob_lbah;
696 * ata_gen_ata_sense - generate a SCSI fixed sense block
697 * @qc: Command that we are erroring out
699 * Generate sense block for a failed ATA command @qc. Descriptor
700 * format is used to accomodate LBA48 block address.
705 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
707 struct ata_device *dev = qc->dev;
708 struct scsi_cmnd *cmd = qc->scsicmd;
709 struct ata_taskfile *tf = &qc->result_tf;
710 unsigned char *sb = cmd->sense_buffer;
711 unsigned char *desc = sb + 8;
712 int verbose = qc->ap->ops->error_handler == NULL;
715 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
717 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
719 /* sense data is current and format is descriptor */
722 /* Use ata_to_sense_error() to map status register bits
723 * onto sense key, asc & ascq.
726 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
727 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
728 &sb[1], &sb[2], &sb[3], verbose);
732 block = ata_tf_read_block(&qc->result_tf, dev);
734 /* information sense data descriptor */
739 desc[2] |= 0x80; /* valid */
740 desc[6] = block >> 40;
741 desc[7] = block >> 32;
742 desc[8] = block >> 24;
743 desc[9] = block >> 16;
744 desc[10] = block >> 8;
748 static void ata_scsi_sdev_config(struct scsi_device *sdev)
750 sdev->use_10_for_rw = 1;
751 sdev->use_10_for_ms = 1;
753 /* Schedule policy is determined by ->qc_defer() callback and
754 * it needs to see every deferred qc. Set dev_blocked to 1 to
755 * prevent SCSI midlayer from automatically deferring
758 sdev->max_device_blocked = 1;
761 static void ata_scsi_dev_config(struct scsi_device *sdev,
762 struct ata_device *dev)
764 /* configure max sectors */
765 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
767 /* SATA DMA transfers must be multiples of 4 byte, so
768 * we need to pad ATAPI transfers using an extra sg.
769 * Decrement max hw segments accordingly.
771 if (dev->class == ATA_DEV_ATAPI) {
772 struct request_queue *q = sdev->request_queue;
773 blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
776 if (dev->flags & ATA_DFLAG_NCQ) {
779 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
780 depth = min(ATA_MAX_QUEUE - 1, depth);
781 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
786 * ata_scsi_slave_config - Set SCSI device attributes
787 * @sdev: SCSI device to examine
789 * This is called before we actually start reading
790 * and writing to the device, to configure certain
791 * SCSI mid-layer behaviors.
794 * Defined by SCSI layer. We don't really care.
797 int ata_scsi_slave_config(struct scsi_device *sdev)
799 struct ata_port *ap = ata_shost_to_port(sdev->host);
800 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
802 ata_scsi_sdev_config(sdev);
804 sdev->manage_start_stop = 1;
807 ata_scsi_dev_config(sdev, dev);
809 return 0; /* scsi layer doesn't check return value, sigh */
813 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
814 * @sdev: SCSI device to be destroyed
816 * @sdev is about to be destroyed for hot/warm unplugging. If
817 * this unplugging was initiated by libata as indicated by NULL
818 * dev->sdev, this function doesn't have to do anything.
819 * Otherwise, SCSI layer initiated warm-unplug is in progress.
820 * Clear dev->sdev, schedule the device for ATA detach and invoke
824 * Defined by SCSI layer. We don't really care.
826 void ata_scsi_slave_destroy(struct scsi_device *sdev)
828 struct ata_port *ap = ata_shost_to_port(sdev->host);
830 struct ata_device *dev;
832 if (!ap->ops->error_handler)
835 spin_lock_irqsave(ap->lock, flags);
836 dev = __ata_scsi_find_dev(ap, sdev);
837 if (dev && dev->sdev) {
838 /* SCSI device already in CANCEL state, no need to offline it */
840 dev->flags |= ATA_DFLAG_DETACH;
841 ata_port_schedule_eh(ap);
843 spin_unlock_irqrestore(ap->lock, flags);
847 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
848 * @sdev: SCSI device to configure queue depth for
849 * @queue_depth: new queue depth
851 * This is libata standard hostt->change_queue_depth callback.
852 * SCSI will call into this callback when user tries to set queue
856 * SCSI layer (we don't care)
859 * Newly configured queue depth.
861 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
863 struct ata_port *ap = ata_shost_to_port(sdev->host);
864 struct ata_device *dev;
867 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
868 return sdev->queue_depth;
870 dev = ata_scsi_find_dev(ap, sdev);
871 if (!dev || !ata_dev_enabled(dev))
872 return sdev->queue_depth;
875 spin_lock_irqsave(ap->lock, flags);
876 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
877 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
878 dev->flags |= ATA_DFLAG_NCQ_OFF;
881 spin_unlock_irqrestore(ap->lock, flags);
883 /* limit and apply queue depth */
884 queue_depth = min(queue_depth, sdev->host->can_queue);
885 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
886 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
888 if (sdev->queue_depth == queue_depth)
891 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
895 /* XXX: for spindown warning */
896 static void ata_delayed_done_timerfn(unsigned long arg)
898 struct scsi_cmnd *scmd = (void *)arg;
900 scmd->scsi_done(scmd);
903 /* XXX: for spindown warning */
904 static void ata_delayed_done(struct scsi_cmnd *scmd)
906 static struct timer_list timer;
908 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
909 mod_timer(&timer, jiffies + 5 * HZ);
913 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
914 * @qc: Storage for translated ATA taskfile
916 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
917 * (to start). Perhaps these commands should be preceded by
918 * CHECK POWER MODE to see what power mode the device is already in.
919 * [See SAT revision 5 at www.t10.org]
922 * spin_lock_irqsave(host lock)
925 * Zero on success, non-zero on error.
927 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
929 struct scsi_cmnd *scmd = qc->scsicmd;
930 struct ata_taskfile *tf = &qc->tf;
931 const u8 *cdb = scmd->cmnd;
933 if (scmd->cmd_len < 5)
936 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
937 tf->protocol = ATA_PROT_NODATA;
939 ; /* ignore IMMED bit, violates sat-r05 */
942 goto invalid_fld; /* LOEJ bit set not supported */
943 if (((cdb[4] >> 4) & 0xf) != 0)
944 goto invalid_fld; /* power conditions not supported */
946 if (qc->dev->horkage & ATA_HORKAGE_SKIP_PM) {
947 /* the device lacks PM support, finish without doing anything */
948 scmd->result = SAM_STAT_GOOD;
953 tf->nsect = 1; /* 1 sector, lba=0 */
955 if (qc->dev->flags & ATA_DFLAG_LBA) {
956 tf->flags |= ATA_TFLAG_LBA;
961 tf->device |= ATA_LBA;
964 tf->lbal = 0x1; /* sect */
965 tf->lbam = 0x0; /* cyl low */
966 tf->lbah = 0x0; /* cyl high */
969 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
971 /* XXX: This is for backward compatibility, will be
972 * removed. Read Documentation/feature-removal-schedule.txt
975 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
976 (system_state == SYSTEM_HALT ||
977 system_state == SYSTEM_POWER_OFF)) {
978 static unsigned long warned;
980 if (!test_and_set_bit(0, &warned)) {
981 ata_dev_printk(qc->dev, KERN_WARNING,
982 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
983 "UPDATE SHUTDOWN UTILITY\n");
984 ata_dev_printk(qc->dev, KERN_WARNING,
985 "For more info, visit "
986 "http://linux-ata.org/shutdown.html\n");
988 /* ->scsi_done is not used, use it for
989 * delayed completion.
991 scmd->scsi_done = qc->scsidone;
992 qc->scsidone = ata_delayed_done;
994 scmd->result = SAM_STAT_GOOD;
998 /* Issue ATA STANDBY IMMEDIATE command */
999 tf->command = ATA_CMD_STANDBYNOW1;
1003 * Standby and Idle condition timers could be implemented but that
1004 * would require libata to implement the Power condition mode page
1005 * and allow the user to change it. Changing mode pages requires
1006 * MODE SELECT to be implemented.
1012 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1013 /* "Invalid field in cbd" */
1019 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1020 * @qc: Storage for translated ATA taskfile
1022 * Sets up an ATA taskfile to issue FLUSH CACHE or
1026 * spin_lock_irqsave(host lock)
1029 * Zero on success, non-zero on error.
1031 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1033 struct ata_taskfile *tf = &qc->tf;
1035 tf->flags |= ATA_TFLAG_DEVICE;
1036 tf->protocol = ATA_PROT_NODATA;
1038 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1039 tf->command = ATA_CMD_FLUSH_EXT;
1041 tf->command = ATA_CMD_FLUSH;
1047 * scsi_6_lba_len - Get LBA and transfer length
1048 * @cdb: SCSI command to translate
1050 * Calculate LBA and transfer length for 6-byte commands.
1054 * @plen: the transfer length
1056 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1061 VPRINTK("six-byte command\n");
1063 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1064 lba |= ((u64)cdb[2]) << 8;
1065 lba |= ((u64)cdb[3]);
1074 * scsi_10_lba_len - Get LBA and transfer length
1075 * @cdb: SCSI command to translate
1077 * Calculate LBA and transfer length for 10-byte commands.
1081 * @plen: the transfer length
1083 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1088 VPRINTK("ten-byte command\n");
1090 lba |= ((u64)cdb[2]) << 24;
1091 lba |= ((u64)cdb[3]) << 16;
1092 lba |= ((u64)cdb[4]) << 8;
1093 lba |= ((u64)cdb[5]);
1095 len |= ((u32)cdb[7]) << 8;
1096 len |= ((u32)cdb[8]);
1103 * scsi_16_lba_len - Get LBA and transfer length
1104 * @cdb: SCSI command to translate
1106 * Calculate LBA and transfer length for 16-byte commands.
1110 * @plen: the transfer length
1112 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1117 VPRINTK("sixteen-byte command\n");
1119 lba |= ((u64)cdb[2]) << 56;
1120 lba |= ((u64)cdb[3]) << 48;
1121 lba |= ((u64)cdb[4]) << 40;
1122 lba |= ((u64)cdb[5]) << 32;
1123 lba |= ((u64)cdb[6]) << 24;
1124 lba |= ((u64)cdb[7]) << 16;
1125 lba |= ((u64)cdb[8]) << 8;
1126 lba |= ((u64)cdb[9]);
1128 len |= ((u32)cdb[10]) << 24;
1129 len |= ((u32)cdb[11]) << 16;
1130 len |= ((u32)cdb[12]) << 8;
1131 len |= ((u32)cdb[13]);
1138 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1139 * @qc: Storage for translated ATA taskfile
1141 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1144 * spin_lock_irqsave(host lock)
1147 * Zero on success, non-zero on error.
1149 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1151 struct scsi_cmnd *scmd = qc->scsicmd;
1152 struct ata_taskfile *tf = &qc->tf;
1153 struct ata_device *dev = qc->dev;
1154 u64 dev_sectors = qc->dev->n_sectors;
1155 const u8 *cdb = scmd->cmnd;
1159 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1160 tf->protocol = ATA_PROT_NODATA;
1162 if (cdb[0] == VERIFY) {
1163 if (scmd->cmd_len < 10)
1165 scsi_10_lba_len(cdb, &block, &n_block);
1166 } else if (cdb[0] == VERIFY_16) {
1167 if (scmd->cmd_len < 16)
1169 scsi_16_lba_len(cdb, &block, &n_block);
1175 if (block >= dev_sectors)
1177 if ((block + n_block) > dev_sectors)
1180 if (dev->flags & ATA_DFLAG_LBA) {
1181 tf->flags |= ATA_TFLAG_LBA;
1183 if (lba_28_ok(block, n_block)) {
1185 tf->command = ATA_CMD_VERIFY;
1186 tf->device |= (block >> 24) & 0xf;
1187 } else if (lba_48_ok(block, n_block)) {
1188 if (!(dev->flags & ATA_DFLAG_LBA48))
1192 tf->flags |= ATA_TFLAG_LBA48;
1193 tf->command = ATA_CMD_VERIFY_EXT;
1195 tf->hob_nsect = (n_block >> 8) & 0xff;
1197 tf->hob_lbah = (block >> 40) & 0xff;
1198 tf->hob_lbam = (block >> 32) & 0xff;
1199 tf->hob_lbal = (block >> 24) & 0xff;
1201 /* request too large even for LBA48 */
1204 tf->nsect = n_block & 0xff;
1206 tf->lbah = (block >> 16) & 0xff;
1207 tf->lbam = (block >> 8) & 0xff;
1208 tf->lbal = block & 0xff;
1210 tf->device |= ATA_LBA;
1213 u32 sect, head, cyl, track;
1215 if (!lba_28_ok(block, n_block))
1218 /* Convert LBA to CHS */
1219 track = (u32)block / dev->sectors;
1220 cyl = track / dev->heads;
1221 head = track % dev->heads;
1222 sect = (u32)block % dev->sectors + 1;
1224 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1225 (u32)block, track, cyl, head, sect);
1227 /* Check whether the converted CHS can fit.
1231 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1234 tf->command = ATA_CMD_VERIFY;
1235 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1238 tf->lbah = cyl >> 8;
1245 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1246 /* "Invalid field in cbd" */
1250 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1251 /* "Logical Block Address out of range" */
1255 scmd->result = SAM_STAT_GOOD;
1260 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1261 * @qc: Storage for translated ATA taskfile
1263 * Converts any of six SCSI read/write commands into the
1264 * ATA counterpart, including starting sector (LBA),
1265 * sector count, and taking into account the device's LBA48
1268 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1269 * %WRITE_16 are currently supported.
1272 * spin_lock_irqsave(host lock)
1275 * Zero on success, non-zero on error.
1277 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1279 struct scsi_cmnd *scmd = qc->scsicmd;
1280 const u8 *cdb = scmd->cmnd;
1281 unsigned int tf_flags = 0;
1286 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1287 tf_flags |= ATA_TFLAG_WRITE;
1289 /* Calculate the SCSI LBA, transfer length and FUA. */
1293 if (unlikely(scmd->cmd_len < 10))
1295 scsi_10_lba_len(cdb, &block, &n_block);
1296 if (unlikely(cdb[1] & (1 << 3)))
1297 tf_flags |= ATA_TFLAG_FUA;
1301 if (unlikely(scmd->cmd_len < 6))
1303 scsi_6_lba_len(cdb, &block, &n_block);
1305 /* for 6-byte r/w commands, transfer length 0
1306 * means 256 blocks of data, not 0 block.
1313 if (unlikely(scmd->cmd_len < 16))
1315 scsi_16_lba_len(cdb, &block, &n_block);
1316 if (unlikely(cdb[1] & (1 << 3)))
1317 tf_flags |= ATA_TFLAG_FUA;
1320 DPRINTK("no-byte command\n");
1324 /* Check and compose ATA command */
1326 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1327 * length 0 means transfer 0 block of data.
1328 * However, for ATA R/W commands, sector count 0 means
1329 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1331 * WARNING: one or two older ATA drives treat 0 as 0...
1335 qc->flags |= ATA_QCFLAG_IO;
1336 qc->nbytes = n_block * ATA_SECT_SIZE;
1338 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1340 if (likely(rc == 0))
1345 /* treat all other errors as -EINVAL, fall through */
1347 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1348 /* "Invalid field in cbd" */
1352 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1353 /* "Logical Block Address out of range" */
1357 scmd->result = SAM_STAT_GOOD;
1361 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1363 struct ata_port *ap = qc->ap;
1364 struct scsi_cmnd *cmd = qc->scsicmd;
1365 u8 *cdb = cmd->cmnd;
1366 int need_sense = (qc->err_mask != 0);
1368 /* For ATA pass thru (SAT) commands, generate a sense block if
1369 * user mandated it or if there's an error. Note that if we
1370 * generate because the user forced us to, a check condition
1371 * is generated and the ATA register values are returned
1372 * whether the command completed successfully or not. If there
1373 * was no error, SK, ASC and ASCQ will all be zero.
1375 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1376 ((cdb[2] & 0x20) || need_sense)) {
1377 ata_gen_passthru_sense(qc);
1380 cmd->result = SAM_STAT_GOOD;
1382 /* TODO: decide which descriptor format to use
1383 * for 48b LBA devices and call that here
1384 * instead of the fixed desc, which is only
1385 * good for smaller LBA (and maybe CHS?)
1388 ata_gen_ata_sense(qc);
1392 /* XXX: track spindown state for spindown skipping and warning */
1393 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1394 qc->tf.command == ATA_CMD_STANDBYNOW1))
1395 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1396 else if (likely(system_state != SYSTEM_HALT &&
1397 system_state != SYSTEM_POWER_OFF))
1398 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1400 if (need_sense && !ap->ops->error_handler)
1401 ata_dump_status(ap->print_id, &qc->result_tf);
1409 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1410 * @dev: ATA device to which the command is addressed
1411 * @cmd: SCSI command to execute
1412 * @done: SCSI command completion function
1413 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1415 * Our ->queuecommand() function has decided that the SCSI
1416 * command issued can be directly translated into an ATA
1417 * command, rather than handled internally.
1419 * This function sets up an ata_queued_cmd structure for the
1420 * SCSI command, and sends that ata_queued_cmd to the hardware.
1422 * The xlat_func argument (actor) returns 0 if ready to execute
1423 * ATA command, else 1 to finish translation. If 1 is returned
1424 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1425 * to be set reflecting an error condition or clean (early)
1429 * spin_lock_irqsave(host lock)
1432 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1433 * needs to be deferred.
1435 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1436 void (*done)(struct scsi_cmnd *),
1437 ata_xlat_func_t xlat_func)
1439 struct ata_port *ap = dev->link->ap;
1440 struct ata_queued_cmd *qc;
1445 qc = ata_scsi_qc_new(dev, cmd, done);
1449 /* data is present; dma-map it */
1450 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1451 cmd->sc_data_direction == DMA_TO_DEVICE) {
1452 if (unlikely(scsi_bufflen(cmd) < 1)) {
1453 ata_dev_printk(dev, KERN_WARNING,
1454 "WARNING: zero len r/w req\n");
1458 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1460 qc->dma_dir = cmd->sc_data_direction;
1463 qc->complete_fn = ata_scsi_qc_complete;
1468 if (ap->ops->qc_defer) {
1469 if ((rc = ap->ops->qc_defer(qc)))
1473 /* select device, send command to hardware */
1482 DPRINTK("EXIT - early finish (good or error)\n");
1487 cmd->result = (DID_ERROR << 16);
1490 DPRINTK("EXIT - internal\n");
1495 DPRINTK("EXIT - defer\n");
1496 if (rc == ATA_DEFER_LINK)
1497 return SCSI_MLQUEUE_DEVICE_BUSY;
1499 return SCSI_MLQUEUE_HOST_BUSY;
1503 * ata_scsi_rbuf_get - Map response buffer.
1504 * @cmd: SCSI command containing buffer to be mapped.
1505 * @buf_out: Pointer to mapped area.
1507 * Maps buffer contained within SCSI command @cmd.
1510 * spin_lock_irqsave(host lock)
1513 * Length of response buffer.
1516 static unsigned int ata_scsi_rbuf_get(struct scsi_cmnd *cmd, u8 **buf_out)
1519 unsigned int buflen;
1521 struct scatterlist *sg = scsi_sglist(cmd);
1524 buf = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
1525 buflen = sg->length;
1536 * ata_scsi_rbuf_put - Unmap response buffer.
1537 * @cmd: SCSI command containing buffer to be unmapped.
1538 * @buf: buffer to unmap
1540 * Unmaps response buffer contained within @cmd.
1543 * spin_lock_irqsave(host lock)
1546 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, u8 *buf)
1548 struct scatterlist *sg = scsi_sglist(cmd);
1550 kunmap_atomic(buf - sg->offset, KM_IRQ0);
1554 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1555 * @args: device IDENTIFY data / SCSI command of interest.
1556 * @actor: Callback hook for desired SCSI command simulator
1558 * Takes care of the hard work of simulating a SCSI command...
1559 * Mapping the response buffer, calling the command's handler,
1560 * and handling the handler's return value. This return value
1561 * indicates whether the handler wishes the SCSI command to be
1562 * completed successfully (0), or not (in which case cmd->result
1563 * and sense buffer are assumed to be set).
1566 * spin_lock_irqsave(host lock)
1569 void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1570 unsigned int (*actor) (struct ata_scsi_args *args,
1571 u8 *rbuf, unsigned int buflen))
1574 unsigned int buflen, rc;
1575 struct scsi_cmnd *cmd = args->cmd;
1577 buflen = ata_scsi_rbuf_get(cmd, &rbuf);
1578 memset(rbuf, 0, buflen);
1579 rc = actor(args, rbuf, buflen);
1580 ata_scsi_rbuf_put(cmd, rbuf);
1583 cmd->result = SAM_STAT_GOOD;
1588 * ATA_SCSI_RBUF_SET - helper to set values in SCSI response buffer
1589 * @idx: byte index into SCSI response buffer
1590 * @val: value to set
1592 * To be used by SCSI command simulator functions. This macros
1593 * expects two local variables, u8 *rbuf and unsigned int buflen,
1599 #define ATA_SCSI_RBUF_SET(idx, val) do { \
1600 if ((idx) < buflen) rbuf[(idx)] = (u8)(val); \
1604 * ata_scsiop_inq_std - Simulate INQUIRY command
1605 * @args: device IDENTIFY data / SCSI command of interest.
1606 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1607 * @buflen: Response buffer length.
1609 * Returns standard device identification data associated
1610 * with non-VPD INQUIRY command output.
1613 * spin_lock_irqsave(host lock)
1616 unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf,
1617 unsigned int buflen)
1622 0x5, /* claim SPC-3 version compatibility */
1627 /* set scsi removeable (RMB) bit per ata bit */
1628 if (ata_id_removeable(args->id))
1633 memcpy(rbuf, hdr, sizeof(hdr));
1636 memcpy(&rbuf[8], "ATA ", 8);
1637 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1638 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1639 if (rbuf[32] == 0 || rbuf[32] == ' ')
1640 memcpy(&rbuf[32], "n/a ", 4);
1644 const u8 versions[] = {
1645 0x60, /* SAM-3 (no version claimed) */
1648 0x20, /* SBC-2 (no version claimed) */
1651 0x60 /* SPC-3 (no version claimed) */
1654 memcpy(rbuf + 59, versions, sizeof(versions));
1661 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1662 * @args: device IDENTIFY data / SCSI command of interest.
1663 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1664 * @buflen: Response buffer length.
1666 * Returns list of inquiry VPD pages available.
1669 * spin_lock_irqsave(host lock)
1672 unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf,
1673 unsigned int buflen)
1675 const u8 pages[] = {
1676 0x00, /* page 0x00, this page */
1677 0x80, /* page 0x80, unit serial no page */
1678 0x83 /* page 0x83, device ident page */
1680 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1683 memcpy(rbuf + 4, pages, sizeof(pages));
1689 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1690 * @args: device IDENTIFY data / SCSI command of interest.
1691 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1692 * @buflen: Response buffer length.
1694 * Returns ATA device serial number.
1697 * spin_lock_irqsave(host lock)
1700 unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf,
1701 unsigned int buflen)
1705 0x80, /* this page code */
1707 ATA_ID_SERNO_LEN, /* page len */
1709 memcpy(rbuf, hdr, sizeof(hdr));
1711 if (buflen > (ATA_ID_SERNO_LEN + 4 - 1))
1712 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1713 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1719 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
1720 * @args: device IDENTIFY data / SCSI command of interest.
1721 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1722 * @buflen: Response buffer length.
1724 * Yields two logical unit device identification designators:
1725 * - vendor specific ASCII containing the ATA serial number
1726 * - SAT defined "t10 vendor id based" containing ASCII vendor
1727 * name ("ATA "), model and serial numbers.
1730 * spin_lock_irqsave(host lock)
1733 unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf,
1734 unsigned int buflen)
1737 const int sat_model_serial_desc_len = 68;
1739 rbuf[1] = 0x83; /* this page code */
1742 if (buflen > (ATA_ID_SERNO_LEN + num + 3)) {
1743 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
1745 rbuf[num + 3] = ATA_ID_SERNO_LEN;
1747 ata_id_string(args->id, (unsigned char *) rbuf + num,
1748 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1749 num += ATA_ID_SERNO_LEN;
1751 if (buflen > (sat_model_serial_desc_len + num + 3)) {
1752 /* SAT defined lu model and serial numbers descriptor */
1753 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
1756 rbuf[num + 3] = sat_model_serial_desc_len;
1758 memcpy(rbuf + num, "ATA ", 8);
1760 ata_id_string(args->id, (unsigned char *) rbuf + num,
1761 ATA_ID_PROD, ATA_ID_PROD_LEN);
1762 num += ATA_ID_PROD_LEN;
1763 ata_id_string(args->id, (unsigned char *) rbuf + num,
1764 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
1765 num += ATA_ID_SERNO_LEN;
1767 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
1772 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
1773 * @args: device IDENTIFY data / SCSI command of interest.
1774 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1775 * @buflen: Response buffer length.
1777 * Yields SAT-specified ATA VPD page.
1780 * spin_lock_irqsave(host lock)
1783 unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf,
1784 unsigned int buflen)
1787 struct ata_taskfile tf;
1793 memset(&pbuf, 0, sizeof(pbuf));
1794 memset(&tf, 0, sizeof(tf));
1796 pbuf[1] = 0x89; /* our page code */
1797 pbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
1798 pbuf[3] = (0x238 & 0xff);
1800 memcpy(&pbuf[8], "linux ", 8);
1801 memcpy(&pbuf[16], "libata ", 16);
1802 memcpy(&pbuf[32], DRV_VERSION, 4);
1803 ata_id_string(args->id, &pbuf[32], ATA_ID_FW_REV, 4);
1805 /* we don't store the ATA device signature, so we fake it */
1807 tf.command = ATA_DRDY; /* really, this is Status reg */
1811 ata_tf_to_fis(&tf, 0, 1, &pbuf[36]); /* TODO: PMP? */
1812 pbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
1814 pbuf[56] = ATA_CMD_ID_ATA;
1816 i = min(buflen, 60U);
1817 memcpy(rbuf, &pbuf[0], i);
1823 memcpy(&rbuf[60], &args->id[0], min(buflen, 512U));
1828 * ata_scsiop_noop - Command handler that simply returns success.
1829 * @args: device IDENTIFY data / SCSI command of interest.
1830 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1831 * @buflen: Response buffer length.
1833 * No operation. Simply returns success to caller, to indicate
1834 * that the caller should successfully complete this SCSI command.
1837 * spin_lock_irqsave(host lock)
1840 unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf,
1841 unsigned int buflen)
1848 * ata_msense_push - Push data onto MODE SENSE data output buffer
1849 * @ptr_io: (input/output) Location to store more output data
1850 * @last: End of output data buffer
1851 * @buf: Pointer to BLOB being added to output buffer
1852 * @buflen: Length of BLOB
1854 * Store MODE SENSE data on an output buffer.
1860 static void ata_msense_push(u8 **ptr_io, const u8 *last,
1861 const u8 *buf, unsigned int buflen)
1865 if ((ptr + buflen - 1) > last)
1868 memcpy(ptr, buf, buflen);
1876 * ata_msense_caching - Simulate MODE SENSE caching info page
1877 * @id: device IDENTIFY data
1878 * @ptr_io: (input/output) Location to store more output data
1879 * @last: End of output data buffer
1881 * Generate a caching info page, which conditionally indicates
1882 * write caching to the SCSI layer, depending on device
1889 static unsigned int ata_msense_caching(u16 *id, u8 **ptr_io,
1892 u8 page[CACHE_MPAGE_LEN];
1894 memcpy(page, def_cache_mpage, sizeof(page));
1895 if (ata_id_wcache_enabled(id))
1896 page[2] |= (1 << 2); /* write cache enable */
1897 if (!ata_id_rahead_enabled(id))
1898 page[12] |= (1 << 5); /* disable read ahead */
1900 ata_msense_push(ptr_io, last, page, sizeof(page));
1901 return sizeof(page);
1905 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
1906 * @dev: Device associated with this MODE SENSE command
1907 * @ptr_io: (input/output) Location to store more output data
1908 * @last: End of output data buffer
1910 * Generate a generic MODE SENSE control mode page.
1916 static unsigned int ata_msense_ctl_mode(u8 **ptr_io, const u8 *last)
1918 ata_msense_push(ptr_io, last, def_control_mpage,
1919 sizeof(def_control_mpage));
1920 return sizeof(def_control_mpage);
1924 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
1925 * @dev: Device associated with this MODE SENSE command
1926 * @ptr_io: (input/output) Location to store more output data
1927 * @last: End of output data buffer
1929 * Generate a generic MODE SENSE r/w error recovery page.
1935 static unsigned int ata_msense_rw_recovery(u8 **ptr_io, const u8 *last)
1938 ata_msense_push(ptr_io, last, def_rw_recovery_mpage,
1939 sizeof(def_rw_recovery_mpage));
1940 return sizeof(def_rw_recovery_mpage);
1944 * We can turn this into a real blacklist if it's needed, for now just
1945 * blacklist any Maxtor BANC1G10 revision firmware
1947 static int ata_dev_supports_fua(u16 *id)
1949 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
1953 if (!ata_id_has_fua(id))
1956 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
1957 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
1959 if (strcmp(model, "Maxtor"))
1961 if (strcmp(fw, "BANC1G10"))
1964 return 0; /* blacklisted */
1968 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
1969 * @args: device IDENTIFY data / SCSI command of interest.
1970 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1971 * @buflen: Response buffer length.
1973 * Simulate MODE SENSE commands. Assume this is invoked for direct
1974 * access devices (e.g. disks) only. There should be no block
1975 * descriptor for other device types.
1978 * spin_lock_irqsave(host lock)
1981 unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf,
1982 unsigned int buflen)
1984 struct ata_device *dev = args->dev;
1985 u8 *scsicmd = args->cmd->cmnd, *p, *last;
1986 const u8 sat_blk_desc[] = {
1987 0, 0, 0, 0, /* number of blocks: sat unspecified */
1989 0, 0x2, 0x0 /* block length: 512 bytes */
1992 unsigned int ebd, page_control, six_byte, output_len, alloc_len, minlen;
1997 six_byte = (scsicmd[0] == MODE_SENSE);
1998 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2000 * LLBA bit in msense(10) ignored (compliant)
2003 page_control = scsicmd[2] >> 6;
2004 switch (page_control) {
2005 case 0: /* current */
2006 break; /* supported */
2008 goto saving_not_supp;
2009 case 1: /* changeable */
2010 case 2: /* defaults */
2016 output_len = 4 + (ebd ? 8 : 0);
2017 alloc_len = scsicmd[4];
2019 output_len = 8 + (ebd ? 8 : 0);
2020 alloc_len = (scsicmd[7] << 8) + scsicmd[8];
2022 minlen = (alloc_len < buflen) ? alloc_len : buflen;
2024 p = rbuf + output_len;
2025 last = rbuf + minlen - 1;
2027 pg = scsicmd[2] & 0x3f;
2030 * No mode subpages supported (yet) but asking for _all_
2031 * subpages may be valid
2033 if (spg && (spg != ALL_SUB_MPAGES))
2037 case RW_RECOVERY_MPAGE:
2038 output_len += ata_msense_rw_recovery(&p, last);
2042 output_len += ata_msense_caching(args->id, &p, last);
2045 case CONTROL_MPAGE: {
2046 output_len += ata_msense_ctl_mode(&p, last);
2051 output_len += ata_msense_rw_recovery(&p, last);
2052 output_len += ata_msense_caching(args->id, &p, last);
2053 output_len += ata_msense_ctl_mode(&p, last);
2056 default: /* invalid page code */
2064 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2065 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2070 rbuf[0] = output_len;
2075 rbuf[3] = sizeof(sat_blk_desc);
2077 memcpy(rbuf + 4, sat_blk_desc,
2078 sizeof(sat_blk_desc));
2082 rbuf[0] = output_len >> 8;
2084 rbuf[1] = output_len;
2089 rbuf[7] = sizeof(sat_blk_desc);
2091 memcpy(rbuf + 8, sat_blk_desc,
2092 sizeof(sat_blk_desc));
2098 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2099 /* "Invalid field in cbd" */
2103 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2104 /* "Saving parameters not supported" */
2109 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2110 * @args: device IDENTIFY data / SCSI command of interest.
2111 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2112 * @buflen: Response buffer length.
2114 * Simulate READ CAPACITY commands.
2119 unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf,
2120 unsigned int buflen)
2122 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
2126 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2127 if (last_lba >= 0xffffffffULL)
2128 last_lba = 0xffffffff;
2130 /* sector count, 32-bit */
2131 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 3));
2132 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 2));
2133 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 1));
2134 ATA_SCSI_RBUF_SET(3, last_lba);
2137 ATA_SCSI_RBUF_SET(6, ATA_SECT_SIZE >> 8);
2138 ATA_SCSI_RBUF_SET(7, ATA_SECT_SIZE);
2140 /* sector count, 64-bit */
2141 ATA_SCSI_RBUF_SET(0, last_lba >> (8 * 7));
2142 ATA_SCSI_RBUF_SET(1, last_lba >> (8 * 6));
2143 ATA_SCSI_RBUF_SET(2, last_lba >> (8 * 5));
2144 ATA_SCSI_RBUF_SET(3, last_lba >> (8 * 4));
2145 ATA_SCSI_RBUF_SET(4, last_lba >> (8 * 3));
2146 ATA_SCSI_RBUF_SET(5, last_lba >> (8 * 2));
2147 ATA_SCSI_RBUF_SET(6, last_lba >> (8 * 1));
2148 ATA_SCSI_RBUF_SET(7, last_lba);
2151 ATA_SCSI_RBUF_SET(10, ATA_SECT_SIZE >> 8);
2152 ATA_SCSI_RBUF_SET(11, ATA_SECT_SIZE);
2159 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2160 * @args: device IDENTIFY data / SCSI command of interest.
2161 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2162 * @buflen: Response buffer length.
2164 * Simulate REPORT LUNS command.
2167 * spin_lock_irqsave(host lock)
2170 unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf,
2171 unsigned int buflen)
2174 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2180 * ata_scsi_set_sense - Set SCSI sense data and status
2181 * @cmd: SCSI request to be handled
2182 * @sk: SCSI-defined sense key
2183 * @asc: SCSI-defined additional sense code
2184 * @ascq: SCSI-defined additional sense code qualifier
2186 * Helper function that builds a valid fixed format, current
2187 * response code and the given sense key (sk), additional sense
2188 * code (asc) and additional sense code qualifier (ascq) with
2189 * a SCSI command status of %SAM_STAT_CHECK_CONDITION and
2190 * DRIVER_SENSE set in the upper bits of scsi_cmnd::result .
2196 void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
2198 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
2200 cmd->sense_buffer[0] = 0x70; /* fixed format, current */
2201 cmd->sense_buffer[2] = sk;
2202 cmd->sense_buffer[7] = 18 - 8; /* additional sense length */
2203 cmd->sense_buffer[12] = asc;
2204 cmd->sense_buffer[13] = ascq;
2208 * ata_scsi_badcmd - End a SCSI request with an error
2209 * @cmd: SCSI request to be handled
2210 * @done: SCSI command completion function
2211 * @asc: SCSI-defined additional sense code
2212 * @ascq: SCSI-defined additional sense code qualifier
2214 * Helper function that completes a SCSI command with
2215 * %SAM_STAT_CHECK_CONDITION, with a sense key %ILLEGAL_REQUEST
2216 * and the specified additional sense codes.
2219 * spin_lock_irqsave(host lock)
2222 void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 asc, u8 ascq)
2225 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, asc, ascq);
2230 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2232 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2233 /* FIXME: not quite right; we don't want the
2234 * translation of taskfile registers into
2235 * a sense descriptors, since that's only
2236 * correct for ATA, not ATAPI
2238 ata_gen_passthru_sense(qc);
2241 qc->scsidone(qc->scsicmd);
2245 /* is it pointless to prefer PIO for "safety reasons"? */
2246 static inline int ata_pio_use_silly(struct ata_port *ap)
2248 return (ap->flags & ATA_FLAG_PIO_DMA);
2251 static void atapi_request_sense(struct ata_queued_cmd *qc)
2253 struct ata_port *ap = qc->ap;
2254 struct scsi_cmnd *cmd = qc->scsicmd;
2256 DPRINTK("ATAPI request sense\n");
2258 /* FIXME: is this needed? */
2259 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
2261 ap->ops->tf_read(ap, &qc->tf);
2263 /* fill these in, for the case where they are -not- overwritten */
2264 cmd->sense_buffer[0] = 0x70;
2265 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2269 ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
2270 qc->dma_dir = DMA_FROM_DEVICE;
2272 memset(&qc->cdb, 0, qc->dev->cdb_len);
2273 qc->cdb[0] = REQUEST_SENSE;
2274 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2276 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2277 qc->tf.command = ATA_CMD_PACKET;
2279 if (ata_pio_use_silly(ap)) {
2280 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2281 qc->tf.feature |= ATAPI_PKT_DMA;
2283 qc->tf.protocol = ATA_PROT_ATAPI;
2284 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2287 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2289 qc->complete_fn = atapi_sense_complete;
2296 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2298 struct scsi_cmnd *cmd = qc->scsicmd;
2299 unsigned int err_mask = qc->err_mask;
2301 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2303 /* handle completion from new EH */
2304 if (unlikely(qc->ap->ops->error_handler &&
2305 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2307 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2308 /* FIXME: not quite right; we don't want the
2309 * translation of taskfile registers into a
2310 * sense descriptors, since that's only
2311 * correct for ATA, not ATAPI
2313 ata_gen_passthru_sense(qc);
2316 /* SCSI EH automatically locks door if sdev->locked is
2317 * set. Sometimes door lock request continues to
2318 * fail, for example, when no media is present. This
2319 * creates a loop - SCSI EH issues door lock which
2320 * fails and gets invoked again to acquire sense data
2321 * for the failed command.
2323 * If door lock fails, always clear sdev->locked to
2324 * avoid this infinite loop.
2326 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2327 qc->dev->sdev->locked = 0;
2329 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2335 /* successful completion or old EH failure path */
2336 if (unlikely(err_mask & AC_ERR_DEV)) {
2337 cmd->result = SAM_STAT_CHECK_CONDITION;
2338 atapi_request_sense(qc);
2340 } else if (unlikely(err_mask)) {
2341 /* FIXME: not quite right; we don't want the
2342 * translation of taskfile registers into
2343 * a sense descriptors, since that's only
2344 * correct for ATA, not ATAPI
2346 ata_gen_passthru_sense(qc);
2348 u8 *scsicmd = cmd->cmnd;
2350 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2352 unsigned int buflen;
2354 buflen = ata_scsi_rbuf_get(cmd, &buf);
2356 /* ATAPI devices typically report zero for their SCSI version,
2357 * and sometimes deviate from the spec WRT response data
2358 * format. If SCSI version is reported as zero like normal,
2359 * then we make the following fixups: 1) Fake MMC-5 version,
2360 * to indicate to the Linux scsi midlayer this is a modern
2361 * device. 2) Ensure response data format / ATAPI information
2362 * are always correct.
2369 ata_scsi_rbuf_put(cmd, buf);
2372 cmd->result = SAM_STAT_GOOD;
2379 * atapi_xlat - Initialize PACKET taskfile
2380 * @qc: command structure to be initialized
2383 * spin_lock_irqsave(host lock)
2386 * Zero on success, non-zero on failure.
2388 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2390 struct scsi_cmnd *scmd = qc->scsicmd;
2391 struct ata_device *dev = qc->dev;
2392 int using_pio = (dev->flags & ATA_DFLAG_PIO);
2393 int nodata = (scmd->sc_data_direction == DMA_NONE);
2394 unsigned int nbytes;
2396 memset(qc->cdb, 0, dev->cdb_len);
2397 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2399 qc->complete_fn = atapi_qc_complete;
2401 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2402 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2403 qc->tf.flags |= ATA_TFLAG_WRITE;
2404 DPRINTK("direction: write\n");
2407 qc->tf.command = ATA_CMD_PACKET;
2408 qc->nbytes = scsi_bufflen(scmd);
2410 /* check whether ATAPI DMA is safe */
2411 if (!using_pio && ata_check_atapi_dma(qc))
2414 /* Some controller variants snoop this value for Packet transfers
2415 to do state machine and FIFO management. Thus we want to set it
2416 properly, and for DMA where it is effectively meaningless */
2417 nbytes = min(qc->nbytes, (unsigned int)63 * 1024);
2419 qc->tf.lbam = (nbytes & 0xFF);
2420 qc->tf.lbah = (nbytes >> 8);
2422 if (using_pio || nodata) {
2423 /* no data, or PIO data xfer */
2425 qc->tf.protocol = ATA_PROT_ATAPI_NODATA;
2427 qc->tf.protocol = ATA_PROT_ATAPI;
2430 qc->tf.protocol = ATA_PROT_ATAPI_DMA;
2431 qc->tf.feature |= ATAPI_PKT_DMA;
2433 if (atapi_dmadir && (scmd->sc_data_direction != DMA_TO_DEVICE))
2434 /* some SATA bridges need us to indicate data xfer direction */
2435 qc->tf.feature |= ATAPI_DMADIR;
2439 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2440 as ATAPI tape drives don't get this right otherwise */
2444 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2446 if (ap->nr_pmp_links == 0) {
2447 if (likely(devno < ata_link_max_devices(&ap->link)))
2448 return &ap->link.device[devno];
2450 if (likely(devno < ap->nr_pmp_links))
2451 return &ap->pmp_link[devno].device[0];
2457 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2458 const struct scsi_device *scsidev)
2462 /* skip commands not addressed to targets we simulate */
2463 if (ap->nr_pmp_links == 0) {
2464 if (unlikely(scsidev->channel || scsidev->lun))
2466 devno = scsidev->id;
2468 if (unlikely(scsidev->id || scsidev->lun))
2470 devno = scsidev->channel;
2473 return ata_find_dev(ap, devno);
2477 * ata_scsi_dev_enabled - determine if device is enabled
2480 * Determine if commands should be sent to the specified device.
2483 * spin_lock_irqsave(host lock)
2486 * 0 if commands are not allowed / 1 if commands are allowed
2489 static int ata_scsi_dev_enabled(struct ata_device *dev)
2491 if (unlikely(!ata_dev_enabled(dev)))
2494 if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) {
2495 if (unlikely(dev->class == ATA_DEV_ATAPI)) {
2496 ata_dev_printk(dev, KERN_WARNING,
2497 "WARNING: ATAPI is %s, device ignored.\n",
2498 atapi_enabled ? "not supported with this driver" : "disabled");
2507 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2508 * @ap: ATA port to which the device is attached
2509 * @scsidev: SCSI device from which we derive the ATA device
2511 * Given various information provided in struct scsi_cmnd,
2512 * map that onto an ATA bus, and using that mapping
2513 * determine which ata_device is associated with the
2514 * SCSI command to be sent.
2517 * spin_lock_irqsave(host lock)
2520 * Associated ATA device, or %NULL if not found.
2522 static struct ata_device *
2523 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2525 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2527 if (unlikely(!dev || !ata_scsi_dev_enabled(dev)))
2534 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2535 * @byte1: Byte 1 from pass-thru CDB.
2538 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2541 ata_scsi_map_proto(u8 byte1)
2543 switch((byte1 & 0x1e) >> 1) {
2544 case 3: /* Non-data */
2545 return ATA_PROT_NODATA;
2548 case 10: /* UDMA Data-in */
2549 case 11: /* UDMA Data-Out */
2550 return ATA_PROT_DMA;
2552 case 4: /* PIO Data-in */
2553 case 5: /* PIO Data-out */
2554 return ATA_PROT_PIO;
2556 case 0: /* Hard Reset */
2558 case 8: /* Device Diagnostic */
2559 case 9: /* Device Reset */
2560 case 7: /* DMA Queued */
2561 case 12: /* FPDMA */
2562 case 15: /* Return Response Info */
2563 default: /* Reserved */
2567 return ATA_PROT_UNKNOWN;
2571 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2572 * @qc: command structure to be initialized
2574 * Handles either 12 or 16-byte versions of the CDB.
2577 * Zero on success, non-zero on failure.
2579 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2581 struct ata_taskfile *tf = &(qc->tf);
2582 struct scsi_cmnd *scmd = qc->scsicmd;
2583 struct ata_device *dev = qc->dev;
2584 const u8 *cdb = scmd->cmnd;
2586 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2589 /* We may not issue DMA commands if no DMA mode is set */
2590 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2594 * 12 and 16 byte CDBs use different offsets to
2595 * provide the various register values.
2597 if (cdb[0] == ATA_16) {
2599 * 16-byte CDB - may contain extended commands.
2601 * If that is the case, copy the upper byte register values.
2603 if (cdb[1] & 0x01) {
2604 tf->hob_feature = cdb[3];
2605 tf->hob_nsect = cdb[5];
2606 tf->hob_lbal = cdb[7];
2607 tf->hob_lbam = cdb[9];
2608 tf->hob_lbah = cdb[11];
2609 tf->flags |= ATA_TFLAG_LBA48;
2611 tf->flags &= ~ATA_TFLAG_LBA48;
2614 * Always copy low byte, device and command registers.
2616 tf->feature = cdb[4];
2621 tf->device = cdb[13];
2622 tf->command = cdb[14];
2625 * 12-byte CDB - incapable of extended commands.
2627 tf->flags &= ~ATA_TFLAG_LBA48;
2629 tf->feature = cdb[3];
2634 tf->device = cdb[8];
2635 tf->command = cdb[9];
2638 /* enforce correct master/slave bit */
2639 tf->device = dev->devno ?
2640 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2642 /* sanity check for pio multi commands */
2643 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2646 if (is_multi_taskfile(tf)) {
2647 unsigned int multi_count = 1 << (cdb[1] >> 5);
2649 /* compare the passed through multi_count
2650 * with the cached multi_count of libata
2652 if (multi_count != dev->multi_count)
2653 ata_dev_printk(dev, KERN_WARNING,
2654 "invalid multi_count %u ignored\n",
2658 /* READ/WRITE LONG use a non-standard sect_size */
2659 qc->sect_size = ATA_SECT_SIZE;
2660 switch (tf->command) {
2661 case ATA_CMD_READ_LONG:
2662 case ATA_CMD_READ_LONG_ONCE:
2663 case ATA_CMD_WRITE_LONG:
2664 case ATA_CMD_WRITE_LONG_ONCE:
2665 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2667 qc->sect_size = scsi_bufflen(scmd);
2671 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2672 * SET_FEATURES - XFER MODE must be preceded/succeeded
2673 * by an update to hardware-specific registers for each
2674 * controller (i.e. the reason for ->set_piomode(),
2675 * ->set_dmamode(), and ->post_set_mode() hooks).
2677 if ((tf->command == ATA_CMD_SET_FEATURES)
2678 && (tf->feature == SETFEATURES_XFER))
2682 * Set flags so that all registers will be written,
2683 * and pass on write indication (used for PIO/DMA
2686 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2688 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2689 tf->flags |= ATA_TFLAG_WRITE;
2692 * Set transfer length.
2694 * TODO: find out if we need to do more here to
2695 * cover scatter/gather case.
2697 qc->nbytes = scsi_bufflen(scmd);
2699 /* request result TF */
2700 qc->flags |= ATA_QCFLAG_RESULT_TF;
2705 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
2706 /* "Invalid field in cdb" */
2711 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2713 * @cmd: SCSI command opcode to consider
2715 * Look up the SCSI command given, and determine whether the
2716 * SCSI command is to be translated or simulated.
2719 * Pointer to translation function if possible, %NULL if not.
2722 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2732 return ata_scsi_rw_xlat;
2734 case SYNCHRONIZE_CACHE:
2735 if (ata_try_flush_cache(dev))
2736 return ata_scsi_flush_xlat;
2741 return ata_scsi_verify_xlat;
2745 return ata_scsi_pass_thru;
2748 return ata_scsi_start_stop_xlat;
2755 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2756 * @ap: ATA port to which the command was being sent
2757 * @cmd: SCSI command to dump
2759 * Prints the contents of a SCSI command via printk().
2762 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2763 struct scsi_cmnd *cmd)
2766 struct scsi_device *scsidev = cmd->device;
2767 u8 *scsicmd = cmd->cmnd;
2769 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2771 scsidev->channel, scsidev->id, scsidev->lun,
2772 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2773 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2778 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2779 void (*done)(struct scsi_cmnd *),
2780 struct ata_device *dev)
2782 u8 scsi_op = scmd->cmnd[0];
2783 ata_xlat_func_t xlat_func;
2786 if (dev->class == ATA_DEV_ATA) {
2787 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2790 xlat_func = ata_get_xlat_func(dev, scsi_op);
2792 if (unlikely(!scmd->cmd_len))
2796 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2797 /* relay SCSI command to ATAPI device */
2798 if (unlikely(scmd->cmd_len > dev->cdb_len))
2801 xlat_func = atapi_xlat;
2803 /* ATA_16 passthru, treat as an ATA command */
2804 if (unlikely(scmd->cmd_len > 16))
2807 xlat_func = ata_get_xlat_func(dev, scsi_op);
2812 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
2814 ata_scsi_simulate(dev, scmd, done);
2819 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
2820 scmd->cmd_len, scsi_op, dev->cdb_len);
2821 scmd->result = DID_ERROR << 16;
2827 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
2828 * @cmd: SCSI command to be sent
2829 * @done: Completion function, called when command is complete
2831 * In some cases, this function translates SCSI commands into
2832 * ATA taskfiles, and queues the taskfiles to be sent to
2833 * hardware. In other cases, this function simulates a
2834 * SCSI device by evaluating and responding to certain
2835 * SCSI commands. This creates the overall effect of
2836 * ATA and ATAPI devices appearing as SCSI devices.
2839 * Releases scsi-layer-held lock, and obtains host lock.
2842 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
2845 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
2847 struct ata_port *ap;
2848 struct ata_device *dev;
2849 struct scsi_device *scsidev = cmd->device;
2850 struct Scsi_Host *shost = scsidev->host;
2853 ap = ata_shost_to_port(shost);
2855 spin_unlock(shost->host_lock);
2856 spin_lock(ap->lock);
2858 ata_scsi_dump_cdb(ap, cmd);
2860 dev = ata_scsi_find_dev(ap, scsidev);
2862 rc = __ata_scsi_queuecmd(cmd, done, dev);
2864 cmd->result = (DID_BAD_TARGET << 16);
2868 spin_unlock(ap->lock);
2869 spin_lock(shost->host_lock);
2874 * ata_scsi_simulate - simulate SCSI command on ATA device
2875 * @dev: the target device
2876 * @cmd: SCSI command being sent to device.
2877 * @done: SCSI command completion function.
2879 * Interprets and directly executes a select list of SCSI commands
2880 * that can be handled internally.
2883 * spin_lock_irqsave(host lock)
2886 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
2887 void (*done)(struct scsi_cmnd *))
2889 struct ata_scsi_args args;
2890 const u8 *scsicmd = cmd->cmnd;
2898 switch(scsicmd[0]) {
2899 /* TODO: worth improving? */
2901 ata_scsi_invalid_field(cmd, done);
2905 if (scsicmd[1] & 2) /* is CmdDt set? */
2906 ata_scsi_invalid_field(cmd, done);
2907 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
2908 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
2909 else switch (scsicmd[2]) {
2911 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
2914 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
2917 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
2920 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
2923 ata_scsi_invalid_field(cmd, done);
2930 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
2933 case MODE_SELECT: /* unconditionally return */
2934 case MODE_SELECT_10: /* bad-field-in-cdb */
2935 ata_scsi_invalid_field(cmd, done);
2939 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2942 case SERVICE_ACTION_IN:
2943 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
2944 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
2946 ata_scsi_invalid_field(cmd, done);
2950 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
2954 ata_scsi_set_sense(cmd, 0, 0, 0);
2955 cmd->result = (DRIVER_SENSE << 24);
2959 /* if we reach this, then writeback caching is disabled,
2960 * turning this into a no-op.
2962 case SYNCHRONIZE_CACHE:
2965 /* no-op's, complete with success */
2969 case TEST_UNIT_READY:
2970 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2973 case SEND_DIAGNOSTIC:
2974 tmp8 = scsicmd[1] & ~(1 << 3);
2975 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
2976 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
2978 ata_scsi_invalid_field(cmd, done);
2981 /* all other commands */
2983 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
2984 /* "Invalid command operation code" */
2990 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
2994 for (i = 0; i < host->n_ports; i++) {
2995 struct ata_port *ap = host->ports[i];
2996 struct Scsi_Host *shost;
2999 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3003 *(struct ata_port **)&shost->hostdata[0] = ap;
3004 ap->scsi_host = shost;
3006 shost->transportt = &ata_scsi_transport_template;
3007 shost->unique_id = ap->print_id;
3010 shost->max_channel = 1;
3011 shost->max_cmd_len = 16;
3013 /* Schedule policy is determined by ->qc_defer()
3014 * callback and it needs to see every deferred qc.
3015 * Set host_blocked to 1 to prevent SCSI midlayer from
3016 * automatically deferring requests.
3018 shost->max_host_blocked = 1;
3020 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3028 scsi_host_put(host->ports[i]->scsi_host);
3031 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3033 scsi_remove_host(shost);
3034 scsi_host_put(shost);
3039 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3042 struct ata_device *last_failed_dev = NULL;
3043 struct ata_link *link;
3044 struct ata_device *dev;
3046 if (ap->flags & ATA_FLAG_DISABLED)
3050 ata_port_for_each_link(link, ap) {
3051 ata_link_for_each_dev(dev, link) {
3052 struct scsi_device *sdev;
3053 int channel = 0, id = 0;
3055 if (!ata_dev_enabled(dev) || dev->sdev)
3058 if (ata_is_host_link(link))
3061 channel = link->pmp;
3063 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3065 if (!IS_ERR(sdev)) {
3067 scsi_device_put(sdev);
3072 /* If we scanned while EH was in progress or allocation
3073 * failure occurred, scan would have failed silently. Check
3074 * whether all devices are attached.
3076 ata_port_for_each_link(link, ap) {
3077 ata_link_for_each_dev(dev, link) {
3078 if (ata_dev_enabled(dev) && !dev->sdev)
3086 /* we're missing some SCSI devices */
3088 /* If caller requested synchrnous scan && we've made
3089 * any progress, sleep briefly and repeat.
3091 if (dev != last_failed_dev) {
3093 last_failed_dev = dev;
3097 /* We might be failing to detect boot device, give it
3098 * a few more chances.
3105 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3106 "failed without making any progress,\n"
3107 " switching to async\n");
3110 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3111 round_jiffies_relative(HZ));
3115 * ata_scsi_offline_dev - offline attached SCSI device
3116 * @dev: ATA device to offline attached SCSI device for
3118 * This function is called from ata_eh_hotplug() and responsible
3119 * for taking the SCSI device attached to @dev offline. This
3120 * function is called with host lock which protects dev->sdev
3124 * spin_lock_irqsave(host lock)
3127 * 1 if attached SCSI device exists, 0 otherwise.
3129 int ata_scsi_offline_dev(struct ata_device *dev)
3132 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3139 * ata_scsi_remove_dev - remove attached SCSI device
3140 * @dev: ATA device to remove attached SCSI device for
3142 * This function is called from ata_eh_scsi_hotplug() and
3143 * responsible for removing the SCSI device attached to @dev.
3146 * Kernel thread context (may sleep).
3148 static void ata_scsi_remove_dev(struct ata_device *dev)
3150 struct ata_port *ap = dev->link->ap;
3151 struct scsi_device *sdev;
3152 unsigned long flags;
3154 /* Alas, we need to grab scan_mutex to ensure SCSI device
3155 * state doesn't change underneath us and thus
3156 * scsi_device_get() always succeeds. The mutex locking can
3157 * be removed if there is __scsi_device_get() interface which
3158 * increments reference counts regardless of device state.
3160 mutex_lock(&ap->scsi_host->scan_mutex);
3161 spin_lock_irqsave(ap->lock, flags);
3163 /* clearing dev->sdev is protected by host lock */
3168 /* If user initiated unplug races with us, sdev can go
3169 * away underneath us after the host lock and
3170 * scan_mutex are released. Hold onto it.
3172 if (scsi_device_get(sdev) == 0) {
3173 /* The following ensures the attached sdev is
3174 * offline on return from ata_scsi_offline_dev()
3175 * regardless it wins or loses the race
3176 * against this function.
3178 scsi_device_set_state(sdev, SDEV_OFFLINE);
3185 spin_unlock_irqrestore(ap->lock, flags);
3186 mutex_unlock(&ap->scsi_host->scan_mutex);
3189 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3190 sdev->sdev_gendev.bus_id);
3192 scsi_remove_device(sdev);
3193 scsi_device_put(sdev);
3197 static void ata_scsi_handle_link_detach(struct ata_link *link)
3199 struct ata_port *ap = link->ap;
3200 struct ata_device *dev;
3202 ata_link_for_each_dev(dev, link) {
3203 unsigned long flags;
3205 if (!(dev->flags & ATA_DFLAG_DETACHED))
3208 spin_lock_irqsave(ap->lock, flags);
3209 dev->flags &= ~ATA_DFLAG_DETACHED;
3210 spin_unlock_irqrestore(ap->lock, flags);
3212 ata_scsi_remove_dev(dev);
3217 * ata_scsi_media_change_notify - send media change event
3218 * @dev: Pointer to the disk device with media change event
3220 * Tell the block layer to send a media change notification
3224 * spin_lock_irqsave(host lock)
3226 void ata_scsi_media_change_notify(struct ata_device *dev)
3228 #ifdef OTHER_AN_PATCHES_HAVE_BEEN_APPLIED
3230 scsi_device_event_notify(dev->sdev, SDEV_MEDIA_CHANGE);
3235 * ata_scsi_hotplug - SCSI part of hotplug
3236 * @work: Pointer to ATA port to perform SCSI hotplug on
3238 * Perform SCSI part of hotplug. It's executed from a separate
3239 * workqueue after EH completes. This is necessary because SCSI
3240 * hot plugging requires working EH and hot unplugging is
3241 * synchronized with hot plugging with a mutex.
3244 * Kernel thread context (may sleep).
3246 void ata_scsi_hotplug(struct work_struct *work)
3248 struct ata_port *ap =
3249 container_of(work, struct ata_port, hotplug_task.work);
3252 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3253 DPRINTK("ENTER/EXIT - unloading\n");
3259 /* Unplug detached devices. We cannot use link iterator here
3260 * because PMP links have to be scanned even if PMP is
3261 * currently not attached. Iterate manually.
3263 ata_scsi_handle_link_detach(&ap->link);
3265 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3266 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3268 /* scan for new ones */
3269 ata_scsi_scan_host(ap, 0);
3275 * ata_scsi_user_scan - indication for user-initiated bus scan
3276 * @shost: SCSI host to scan
3277 * @channel: Channel to scan
3281 * This function is called when user explicitly requests bus
3282 * scan. Set probe pending flag and invoke EH.
3285 * SCSI layer (we don't care)
3290 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3291 unsigned int id, unsigned int lun)
3293 struct ata_port *ap = ata_shost_to_port(shost);
3294 unsigned long flags;
3297 if (!ap->ops->error_handler)
3300 if (lun != SCAN_WILD_CARD && lun)
3303 if (ap->nr_pmp_links == 0) {
3304 if (channel != SCAN_WILD_CARD && channel)
3308 if (id != SCAN_WILD_CARD && id)
3313 spin_lock_irqsave(ap->lock, flags);
3315 if (devno == SCAN_WILD_CARD) {
3316 struct ata_link *link;
3318 ata_port_for_each_link(link, ap) {
3319 struct ata_eh_info *ehi = &link->eh_info;
3320 ehi->probe_mask |= (1 << ata_link_max_devices(link)) - 1;
3321 ehi->action |= ATA_EH_SOFTRESET;
3324 struct ata_device *dev = ata_find_dev(ap, devno);
3327 struct ata_eh_info *ehi = &dev->link->eh_info;
3328 ehi->probe_mask |= 1 << dev->devno;
3329 ehi->action |= ATA_EH_SOFTRESET;
3330 ehi->flags |= ATA_EHI_RESUME_LINK;
3336 ata_port_schedule_eh(ap);
3337 spin_unlock_irqrestore(ap->lock, flags);
3338 ata_port_wait_eh(ap);
3340 spin_unlock_irqrestore(ap->lock, flags);
3346 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3347 * @work: Pointer to ATA port to perform scsi_rescan_device()
3349 * After ATA pass thru (SAT) commands are executed successfully,
3350 * libata need to propagate the changes to SCSI layer. This
3351 * function must be executed from ata_aux_wq such that sdev
3352 * attach/detach don't race with rescan.
3355 * Kernel thread context (may sleep).
3357 void ata_scsi_dev_rescan(struct work_struct *work)
3359 struct ata_port *ap =
3360 container_of(work, struct ata_port, scsi_rescan_task);
3361 struct ata_link *link;
3362 struct ata_device *dev;
3363 unsigned long flags;
3365 spin_lock_irqsave(ap->lock, flags);
3367 ata_port_for_each_link(link, ap) {
3368 ata_link_for_each_dev(dev, link) {
3369 struct scsi_device *sdev = dev->sdev;
3371 if (!ata_dev_enabled(dev) || !sdev)
3373 if (scsi_device_get(sdev))
3376 spin_unlock_irqrestore(ap->lock, flags);
3377 scsi_rescan_device(&(sdev->sdev_gendev));
3378 scsi_device_put(sdev);
3379 spin_lock_irqsave(ap->lock, flags);
3383 spin_unlock_irqrestore(ap->lock, flags);
3387 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3388 * @host: ATA host container for all SAS ports
3389 * @port_info: Information from low-level host driver
3390 * @shost: SCSI host that the scsi device is attached to
3393 * PCI/etc. bus probe sem.
3396 * ata_port pointer on success / NULL on failure.
3399 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3400 struct ata_port_info *port_info,
3401 struct Scsi_Host *shost)
3403 struct ata_port *ap;
3405 ap = ata_port_alloc(host);
3410 ap->lock = shost->host_lock;
3411 ap->pio_mask = port_info->pio_mask;
3412 ap->mwdma_mask = port_info->mwdma_mask;
3413 ap->udma_mask = port_info->udma_mask;
3414 ap->flags |= port_info->flags;
3415 ap->ops = port_info->port_ops;
3416 ap->cbl = ATA_CBL_SATA;
3420 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3423 * ata_sas_port_start - Set port up for dma.
3424 * @ap: Port to initialize
3426 * Called just after data structures for each port are
3427 * initialized. Allocates DMA pad.
3429 * May be used as the port_start() entry in ata_port_operations.
3432 * Inherited from caller.
3434 int ata_sas_port_start(struct ata_port *ap)
3436 return ata_pad_alloc(ap, ap->dev);
3438 EXPORT_SYMBOL_GPL(ata_sas_port_start);
3441 * ata_port_stop - Undo ata_sas_port_start()
3442 * @ap: Port to shut down
3444 * Frees the DMA pad.
3446 * May be used as the port_stop() entry in ata_port_operations.
3449 * Inherited from caller.
3452 void ata_sas_port_stop(struct ata_port *ap)
3454 ata_pad_free(ap, ap->dev);
3456 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3459 * ata_sas_port_init - Initialize a SATA device
3460 * @ap: SATA port to initialize
3463 * PCI/etc. bus probe sem.
3466 * Zero on success, non-zero on error.
3469 int ata_sas_port_init(struct ata_port *ap)
3471 int rc = ap->ops->port_start(ap);
3474 ap->print_id = ata_print_id++;
3475 rc = ata_bus_probe(ap);
3480 EXPORT_SYMBOL_GPL(ata_sas_port_init);
3483 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3484 * @ap: SATA port to destroy
3488 void ata_sas_port_destroy(struct ata_port *ap)
3490 if (ap->ops->port_stop)
3491 ap->ops->port_stop(ap);
3494 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3497 * ata_sas_slave_configure - Default slave_config routine for libata devices
3498 * @sdev: SCSI device to configure
3499 * @ap: ATA port to which SCSI device is attached
3505 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3507 ata_scsi_sdev_config(sdev);
3508 ata_scsi_dev_config(sdev, ap->link.device);
3511 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3514 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3515 * @cmd: SCSI command to be sent
3516 * @done: Completion function, called when command is complete
3517 * @ap: ATA port to which the command is being sent
3520 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3524 int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3525 struct ata_port *ap)
3529 ata_scsi_dump_cdb(ap, cmd);
3531 if (likely(ata_scsi_dev_enabled(ap->link.device)))
3532 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
3534 cmd->result = (DID_BAD_TARGET << 16);
3539 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);