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
53 #define ATA_SCSI_RBUF_SIZE 4096
55 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
56 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
58 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
60 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
61 const struct scsi_device *scsidev);
62 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
63 const struct scsi_device *scsidev);
64 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
65 unsigned int id, unsigned int lun);
68 #define RW_RECOVERY_MPAGE 0x1
69 #define RW_RECOVERY_MPAGE_LEN 12
70 #define CACHE_MPAGE 0x8
71 #define CACHE_MPAGE_LEN 20
72 #define CONTROL_MPAGE 0xa
73 #define CONTROL_MPAGE_LEN 12
74 #define ALL_MPAGES 0x3f
75 #define ALL_SUB_MPAGES 0xff
78 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
80 RW_RECOVERY_MPAGE_LEN - 2,
82 0, /* read retry count */
84 0, /* write retry count */
88 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
91 0, /* contains WCE, needs to be 0 for logic */
92 0, 0, 0, 0, 0, 0, 0, 0, 0,
93 0, /* contains DRA, needs to be 0 for logic */
97 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
99 CONTROL_MPAGE_LEN - 2,
100 2, /* DSENSE=0, GLTSD=1 */
101 0, /* [QAM+QERR may be 1, see 05-359r1] */
102 0, 0, 0, 0, 0xff, 0xff,
103 0, 30 /* extended self test time, see 05-359r1 */
107 * libata transport template. libata doesn't do real transport stuff.
108 * It just needs the eh_timed_out hook.
110 static struct scsi_transport_template ata_scsi_transport_template = {
111 .eh_strategy_handler = ata_scsi_error,
112 .eh_timed_out = ata_scsi_timed_out,
113 .user_scan = ata_scsi_user_scan,
117 static const struct {
120 } link_pm_policy[] = {
121 { NOT_AVAILABLE, "max_performance" },
122 { MIN_POWER, "min_power" },
123 { MAX_PERFORMANCE, "max_performance" },
124 { MEDIUM_POWER, "medium_power" },
127 static const char *ata_scsi_lpm_get(enum link_pm policy)
131 for (i = 0; i < ARRAY_SIZE(link_pm_policy); i++)
132 if (link_pm_policy[i].value == policy)
133 return link_pm_policy[i].name;
138 static ssize_t ata_scsi_lpm_put(struct device *dev,
139 struct device_attribute *attr,
140 const char *buf, size_t count)
142 struct Scsi_Host *shost = class_to_shost(dev);
143 struct ata_port *ap = ata_shost_to_port(shost);
144 enum link_pm policy = 0;
148 * we are skipping array location 0 on purpose - this
149 * is because a value of NOT_AVAILABLE is displayed
150 * to the user as max_performance, but when the user
151 * writes "max_performance", they actually want the
152 * value to match MAX_PERFORMANCE.
154 for (i = 1; i < ARRAY_SIZE(link_pm_policy); i++) {
155 const int len = strlen(link_pm_policy[i].name);
156 if (strncmp(link_pm_policy[i].name, buf, len) == 0 &&
158 policy = link_pm_policy[i].value;
165 ata_lpm_schedule(ap, policy);
170 ata_scsi_lpm_show(struct device *dev, struct device_attribute *attr, char *buf)
172 struct Scsi_Host *shost = class_to_shost(dev);
173 struct ata_port *ap = ata_shost_to_port(shost);
175 ata_scsi_lpm_get(ap->pm_policy);
180 return snprintf(buf, 23, "%s\n", policy);
182 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
183 ata_scsi_lpm_show, ata_scsi_lpm_put);
184 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
186 static ssize_t ata_scsi_park_show(struct device *device,
187 struct device_attribute *attr, char *buf)
189 struct scsi_device *sdev = to_scsi_device(device);
191 struct ata_link *link;
192 struct ata_device *dev;
193 unsigned long flags, now;
194 unsigned int uninitialized_var(msecs);
197 ap = ata_shost_to_port(sdev->host);
199 spin_lock_irqsave(ap->lock, flags);
200 dev = ata_scsi_find_dev(ap, sdev);
205 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
212 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
213 link->eh_context.unloaded_mask & (1 << dev->devno) &&
214 time_after(dev->unpark_deadline, now))
215 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
220 spin_unlock_irq(ap->lock);
222 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
225 static ssize_t ata_scsi_park_store(struct device *device,
226 struct device_attribute *attr,
227 const char *buf, size_t len)
229 struct scsi_device *sdev = to_scsi_device(device);
231 struct ata_device *dev;
236 rc = strict_strtol(buf, 10, &input);
237 if (rc || input < -2)
239 if (input > ATA_TMOUT_MAX_PARK) {
241 input = ATA_TMOUT_MAX_PARK;
244 ap = ata_shost_to_port(sdev->host);
246 spin_lock_irqsave(ap->lock, flags);
247 dev = ata_scsi_find_dev(ap, sdev);
248 if (unlikely(!dev)) {
252 if (dev->class != ATA_DEV_ATA) {
258 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
263 dev->unpark_deadline = ata_deadline(jiffies, input);
264 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
265 ata_port_schedule_eh(ap);
266 complete(&ap->park_req_pending);
270 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
273 dev->flags |= ATA_DFLAG_NO_UNLOAD;
278 spin_unlock_irqrestore(ap->lock, flags);
280 return rc ? rc : len;
282 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
283 ata_scsi_park_show, ata_scsi_park_store);
284 EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
286 static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
288 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
290 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
294 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
295 const char *buf, size_t count)
297 struct Scsi_Host *shost = class_to_shost(dev);
298 struct ata_port *ap = ata_shost_to_port(shost);
299 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
300 return ap->ops->em_store(ap, buf, count);
305 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
308 struct Scsi_Host *shost = class_to_shost(dev);
309 struct ata_port *ap = ata_shost_to_port(shost);
311 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
312 return ap->ops->em_show(ap, buf);
315 DEVICE_ATTR(em_message, S_IRUGO | S_IWUGO,
316 ata_scsi_em_message_show, ata_scsi_em_message_store);
317 EXPORT_SYMBOL_GPL(dev_attr_em_message);
320 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
323 struct Scsi_Host *shost = class_to_shost(dev);
324 struct ata_port *ap = ata_shost_to_port(shost);
326 return snprintf(buf, 23, "%d\n", ap->em_message_type);
328 DEVICE_ATTR(em_message_type, S_IRUGO,
329 ata_scsi_em_message_type_show, NULL);
330 EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
333 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
336 struct scsi_device *sdev = to_scsi_device(dev);
337 struct ata_port *ap = ata_shost_to_port(sdev->host);
338 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
340 if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY))
341 return ap->ops->sw_activity_show(atadev, buf);
346 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
347 const char *buf, size_t count)
349 struct scsi_device *sdev = to_scsi_device(dev);
350 struct ata_port *ap = ata_shost_to_port(sdev->host);
351 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
352 enum sw_activity val;
355 if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
356 val = simple_strtoul(buf, NULL, 0);
358 case OFF: case BLINK_ON: case BLINK_OFF:
359 rc = ap->ops->sw_activity_store(atadev, val);
368 DEVICE_ATTR(sw_activity, S_IWUGO | S_IRUGO, ata_scsi_activity_show,
369 ata_scsi_activity_store);
370 EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
372 struct device_attribute *ata_common_sdev_attrs[] = {
373 &dev_attr_unload_heads,
376 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
378 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
379 void (*done)(struct scsi_cmnd *))
381 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
382 /* "Invalid field in cbd" */
387 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
388 * @sdev: SCSI device for which BIOS geometry is to be determined
389 * @bdev: block device associated with @sdev
390 * @capacity: capacity of SCSI device
391 * @geom: location to which geometry will be output
393 * Generic bios head/sector/cylinder calculator
394 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
395 * mapping. Some situations may arise where the disk is not
396 * bootable if this is not used.
399 * Defined by the SCSI layer. We don't really care.
404 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
405 sector_t capacity, int geom[])
409 sector_div(capacity, 255*63);
416 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
417 * @sdev: SCSI device to get identify data for
418 * @arg: User buffer area for identify data
421 * Defined by the SCSI layer. We don't really care.
424 * Zero on success, negative errno on error.
426 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
429 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
430 u16 __user *dst = arg;
436 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
439 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
440 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
443 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
444 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
447 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
448 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
455 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
456 * @scsidev: Device to which we are issuing command
457 * @arg: User provided data for issuing command
460 * Defined by the SCSI layer. We don't really care.
463 * Zero on success, negative errno on error.
465 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
468 u8 scsi_cmd[MAX_COMMAND_SIZE];
469 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
471 enum dma_data_direction data_dir;
477 if (copy_from_user(args, arg, sizeof(args)))
480 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
484 memset(scsi_cmd, 0, sizeof(scsi_cmd));
487 argsize = SECTOR_SIZE * args[3];
488 argbuf = kmalloc(argsize, GFP_KERNEL);
489 if (argbuf == NULL) {
494 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
495 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
496 block count in sector count field */
497 data_dir = DMA_FROM_DEVICE;
499 scsi_cmd[1] = (3 << 1); /* Non-data */
500 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
504 scsi_cmd[0] = ATA_16;
506 scsi_cmd[4] = args[2];
507 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
508 scsi_cmd[6] = args[3];
509 scsi_cmd[8] = args[1];
513 scsi_cmd[6] = args[1];
515 scsi_cmd[14] = args[0];
517 /* Good values for timeout and retries? Values below
518 from scsi_ioctl_send_command() for default case... */
519 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
520 sensebuf, (10*HZ), 5, 0, NULL);
522 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
523 u8 *desc = sensebuf + 8;
524 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
526 /* If we set cc then ATA pass-through will cause a
527 * check condition even if no error. Filter that. */
528 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
529 struct scsi_sense_hdr sshdr;
530 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
532 if (sshdr.sense_key == 0 &&
533 sshdr.asc == 0 && sshdr.ascq == 0)
534 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
537 /* Send userspace a few ATA registers (same as drivers/ide) */
538 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
539 desc[0] == 0x09) { /* code is "ATA Descriptor" */
540 args[0] = desc[13]; /* status */
541 args[1] = desc[3]; /* error */
542 args[2] = desc[5]; /* sector count (0:7) */
543 if (copy_to_user(arg, args, sizeof(args)))
555 && copy_to_user(arg + sizeof(args), argbuf, argsize))
564 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
565 * @scsidev: Device to which we are issuing command
566 * @arg: User provided data for issuing command
569 * Defined by the SCSI layer. We don't really care.
572 * Zero on success, negative errno on error.
574 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
577 u8 scsi_cmd[MAX_COMMAND_SIZE];
578 u8 args[7], *sensebuf = NULL;
584 if (copy_from_user(args, arg, sizeof(args)))
587 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
591 memset(scsi_cmd, 0, sizeof(scsi_cmd));
592 scsi_cmd[0] = ATA_16;
593 scsi_cmd[1] = (3 << 1); /* Non-data */
594 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
595 scsi_cmd[4] = args[1];
596 scsi_cmd[6] = args[2];
597 scsi_cmd[8] = args[3];
598 scsi_cmd[10] = args[4];
599 scsi_cmd[12] = args[5];
600 scsi_cmd[13] = args[6] & 0x4f;
601 scsi_cmd[14] = args[0];
603 /* Good values for timeout and retries? Values below
604 from scsi_ioctl_send_command() for default case... */
605 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
606 sensebuf, (10*HZ), 5, 0, NULL);
608 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
609 u8 *desc = sensebuf + 8;
610 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
612 /* If we set cc then ATA pass-through will cause a
613 * check condition even if no error. Filter that. */
614 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
615 struct scsi_sense_hdr sshdr;
616 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
618 if (sshdr.sense_key == 0 &&
619 sshdr.asc == 0 && sshdr.ascq == 0)
620 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
623 /* Send userspace ATA registers */
624 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
625 desc[0] == 0x09) {/* code is "ATA Descriptor" */
626 args[0] = desc[13]; /* status */
627 args[1] = desc[3]; /* error */
628 args[2] = desc[5]; /* sector count (0:7) */
629 args[3] = desc[7]; /* lbal */
630 args[4] = desc[9]; /* lbam */
631 args[5] = desc[11]; /* lbah */
632 args[6] = desc[12]; /* select */
633 if (copy_to_user(arg, args, sizeof(args)))
648 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
649 int cmd, void __user *arg)
651 int val = -EINVAL, rc = -EINVAL;
654 case ATA_IOC_GET_IO32:
656 if (copy_to_user(arg, &val, 1))
660 case ATA_IOC_SET_IO32:
661 val = (unsigned long) arg;
666 case HDIO_GET_IDENTITY:
667 return ata_get_identity(ap, scsidev, arg);
670 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
672 return ata_cmd_ioctl(scsidev, arg);
674 case HDIO_DRIVE_TASK:
675 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
677 return ata_task_ioctl(scsidev, arg);
686 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
688 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
690 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
693 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
696 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
697 * @dev: ATA device to which the new command is attached
698 * @cmd: SCSI command that originated this ATA command
699 * @done: SCSI command completion function
701 * Obtain a reference to an unused ata_queued_cmd structure,
702 * which is the basic libata structure representing a single
703 * ATA command sent to the hardware.
705 * If a command was available, fill in the SCSI-specific
706 * portions of the structure with information on the
710 * spin_lock_irqsave(host lock)
713 * Command allocated, or %NULL if none available.
715 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
716 struct scsi_cmnd *cmd,
717 void (*done)(struct scsi_cmnd *))
719 struct ata_queued_cmd *qc;
721 qc = ata_qc_new_init(dev);
726 qc->sg = scsi_sglist(cmd);
727 qc->n_elem = scsi_sg_count(cmd);
729 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
736 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
738 struct scsi_cmnd *scmd = qc->scsicmd;
740 qc->extrabytes = scmd->request->extra_len;
741 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
745 * ata_dump_status - user friendly display of error info
746 * @id: id of the port in question
747 * @tf: ptr to filled out taskfile
749 * Decode and dump the ATA error/status registers for the user so
750 * that they have some idea what really happened at the non
751 * make-believe layer.
754 * inherited from caller
756 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
758 u8 stat = tf->command, err = tf->feature;
760 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
761 if (stat & ATA_BUSY) {
762 printk("Busy }\n"); /* Data is not valid in this case */
764 if (stat & 0x40) printk("DriveReady ");
765 if (stat & 0x20) printk("DeviceFault ");
766 if (stat & 0x10) printk("SeekComplete ");
767 if (stat & 0x08) printk("DataRequest ");
768 if (stat & 0x04) printk("CorrectedError ");
769 if (stat & 0x02) printk("Index ");
770 if (stat & 0x01) printk("Error ");
774 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
775 if (err & 0x04) printk("DriveStatusError ");
777 if (err & 0x04) printk("BadCRC ");
778 else printk("Sector ");
780 if (err & 0x40) printk("UncorrectableError ");
781 if (err & 0x10) printk("SectorIdNotFound ");
782 if (err & 0x02) printk("TrackZeroNotFound ");
783 if (err & 0x01) printk("AddrMarkNotFound ");
790 * ata_to_sense_error - convert ATA error to SCSI error
791 * @id: ATA device number
792 * @drv_stat: value contained in ATA status register
793 * @drv_err: value contained in ATA error register
794 * @sk: the sense key we'll fill out
795 * @asc: the additional sense code we'll fill out
796 * @ascq: the additional sense code qualifier we'll fill out
797 * @verbose: be verbose
799 * Converts an ATA error into a SCSI error. Fill out pointers to
800 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
801 * format sense blocks.
804 * spin_lock_irqsave(host lock)
806 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
807 u8 *asc, u8 *ascq, int verbose)
811 /* Based on the 3ware driver translation table */
812 static const unsigned char sense_table[][4] = {
814 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
816 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
818 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
819 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
820 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
821 /* MC|ID|ABRT|TRK0|MARK */
822 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
824 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
825 /* Bad address mark */
826 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
828 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
830 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
831 /* Media change request */
832 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
834 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
836 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
838 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
839 /* BBD - block marked bad */
840 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
841 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
843 static const unsigned char stat_table[][4] = {
844 /* Must be first because BUSY means no other bits valid */
845 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
846 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
847 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
848 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
849 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
853 * Is this an error we can process/parse
855 if (drv_stat & ATA_BUSY) {
856 drv_err = 0; /* Ignore the err bits, they're invalid */
860 /* Look for drv_err */
861 for (i = 0; sense_table[i][0] != 0xFF; i++) {
862 /* Look for best matches first */
863 if ((sense_table[i][0] & drv_err) ==
865 *sk = sense_table[i][1];
866 *asc = sense_table[i][2];
867 *ascq = sense_table[i][3];
871 /* No immediate match */
873 printk(KERN_WARNING "ata%u: no sense translation for "
874 "error 0x%02x\n", id, drv_err);
877 /* Fall back to interpreting status bits */
878 for (i = 0; stat_table[i][0] != 0xFF; i++) {
879 if (stat_table[i][0] & drv_stat) {
880 *sk = stat_table[i][1];
881 *asc = stat_table[i][2];
882 *ascq = stat_table[i][3];
886 /* No error? Undecoded? */
888 printk(KERN_WARNING "ata%u: no sense translation for "
889 "status: 0x%02x\n", id, drv_stat);
891 /* We need a sensible error return here, which is tricky, and one
892 that won't cause people to do things like return a disk wrongly */
893 *sk = ABORTED_COMMAND;
899 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
900 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
901 id, drv_stat, drv_err, *sk, *asc, *ascq);
906 * ata_gen_passthru_sense - Generate check condition sense block.
907 * @qc: Command that completed.
909 * This function is specific to the ATA descriptor format sense
910 * block specified for the ATA pass through commands. Regardless
911 * of whether the command errored or not, return a sense
912 * block. Copy all controller registers into the sense
913 * block. Clear sense key, ASC & ASCQ if there is no error.
918 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
920 struct scsi_cmnd *cmd = qc->scsicmd;
921 struct ata_taskfile *tf = &qc->result_tf;
922 unsigned char *sb = cmd->sense_buffer;
923 unsigned char *desc = sb + 8;
924 int verbose = qc->ap->ops->error_handler == NULL;
926 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
928 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
931 * Use ata_to_sense_error() to map status register bits
932 * onto sense key, asc & ascq.
935 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
936 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
937 &sb[1], &sb[2], &sb[3], verbose);
942 * Sense data is current and format is descriptor.
948 /* set length of additional sense data */
953 * Copy registers into sense buffer.
956 desc[3] = tf->feature; /* == error reg */
961 desc[12] = tf->device;
962 desc[13] = tf->command; /* == status reg */
965 * Fill in Extend bit, and the high order bytes
968 if (tf->flags & ATA_TFLAG_LBA48) {
970 desc[4] = tf->hob_nsect;
971 desc[6] = tf->hob_lbal;
972 desc[8] = tf->hob_lbam;
973 desc[10] = tf->hob_lbah;
978 * ata_gen_ata_sense - generate a SCSI fixed sense block
979 * @qc: Command that we are erroring out
981 * Generate sense block for a failed ATA command @qc. Descriptor
982 * format is used to accomodate LBA48 block address.
987 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
989 struct ata_device *dev = qc->dev;
990 struct scsi_cmnd *cmd = qc->scsicmd;
991 struct ata_taskfile *tf = &qc->result_tf;
992 unsigned char *sb = cmd->sense_buffer;
993 unsigned char *desc = sb + 8;
994 int verbose = qc->ap->ops->error_handler == NULL;
997 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
999 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1001 /* sense data is current and format is descriptor */
1004 /* Use ata_to_sense_error() to map status register bits
1005 * onto sense key, asc & ascq.
1008 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1009 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1010 &sb[1], &sb[2], &sb[3], verbose);
1014 block = ata_tf_read_block(&qc->result_tf, dev);
1016 /* information sense data descriptor */
1021 desc[2] |= 0x80; /* valid */
1022 desc[6] = block >> 40;
1023 desc[7] = block >> 32;
1024 desc[8] = block >> 24;
1025 desc[9] = block >> 16;
1026 desc[10] = block >> 8;
1030 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1032 sdev->use_10_for_rw = 1;
1033 sdev->use_10_for_ms = 1;
1035 /* Schedule policy is determined by ->qc_defer() callback and
1036 * it needs to see every deferred qc. Set dev_blocked to 1 to
1037 * prevent SCSI midlayer from automatically deferring
1040 sdev->max_device_blocked = 1;
1044 * atapi_drain_needed - Check whether data transfer may overflow
1045 * @rq: request to be checked
1047 * ATAPI commands which transfer variable length data to host
1048 * might overflow due to application error or hardare bug. This
1049 * function checks whether overflow should be drained and ignored
1056 * 1 if ; otherwise, 0.
1058 static int atapi_drain_needed(struct request *rq)
1060 if (likely(!blk_pc_request(rq)))
1063 if (!rq->data_len || (rq->cmd_flags & REQ_RW))
1066 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1069 static int ata_scsi_dev_config(struct scsi_device *sdev,
1070 struct ata_device *dev)
1072 if (!ata_id_has_unload(dev->id))
1073 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1075 /* configure max sectors */
1076 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
1078 if (dev->class == ATA_DEV_ATAPI) {
1079 struct request_queue *q = sdev->request_queue;
1082 /* set the min alignment and padding */
1083 blk_queue_update_dma_alignment(sdev->request_queue,
1084 ATA_DMA_PAD_SZ - 1);
1085 blk_queue_update_dma_pad(sdev->request_queue,
1086 ATA_DMA_PAD_SZ - 1);
1088 /* configure draining */
1089 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1091 ata_dev_printk(dev, KERN_ERR,
1092 "drain buffer allocation failed\n");
1096 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1098 if (ata_id_is_ssd(dev->id))
1099 queue_flag_set_unlocked(QUEUE_FLAG_NONROT,
1100 sdev->request_queue);
1102 /* ATA devices must be sector aligned */
1103 blk_queue_update_dma_alignment(sdev->request_queue,
1105 sdev->manage_start_stop = 1;
1108 if (dev->flags & ATA_DFLAG_AN)
1109 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1111 if (dev->flags & ATA_DFLAG_NCQ) {
1114 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1115 depth = min(ATA_MAX_QUEUE - 1, depth);
1116 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
1123 * ata_scsi_slave_config - Set SCSI device attributes
1124 * @sdev: SCSI device to examine
1126 * This is called before we actually start reading
1127 * and writing to the device, to configure certain
1128 * SCSI mid-layer behaviors.
1131 * Defined by SCSI layer. We don't really care.
1134 int ata_scsi_slave_config(struct scsi_device *sdev)
1136 struct ata_port *ap = ata_shost_to_port(sdev->host);
1137 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1140 ata_scsi_sdev_config(sdev);
1143 rc = ata_scsi_dev_config(sdev, dev);
1149 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1150 * @sdev: SCSI device to be destroyed
1152 * @sdev is about to be destroyed for hot/warm unplugging. If
1153 * this unplugging was initiated by libata as indicated by NULL
1154 * dev->sdev, this function doesn't have to do anything.
1155 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1156 * Clear dev->sdev, schedule the device for ATA detach and invoke
1160 * Defined by SCSI layer. We don't really care.
1162 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1164 struct ata_port *ap = ata_shost_to_port(sdev->host);
1165 struct request_queue *q = sdev->request_queue;
1166 unsigned long flags;
1167 struct ata_device *dev;
1169 if (!ap->ops->error_handler)
1172 spin_lock_irqsave(ap->lock, flags);
1173 dev = __ata_scsi_find_dev(ap, sdev);
1174 if (dev && dev->sdev) {
1175 /* SCSI device already in CANCEL state, no need to offline it */
1177 dev->flags |= ATA_DFLAG_DETACH;
1178 ata_port_schedule_eh(ap);
1180 spin_unlock_irqrestore(ap->lock, flags);
1182 kfree(q->dma_drain_buffer);
1183 q->dma_drain_buffer = NULL;
1184 q->dma_drain_size = 0;
1188 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1189 * @sdev: SCSI device to configure queue depth for
1190 * @queue_depth: new queue depth
1192 * This is libata standard hostt->change_queue_depth callback.
1193 * SCSI will call into this callback when user tries to set queue
1197 * SCSI layer (we don't care)
1200 * Newly configured queue depth.
1202 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1204 struct ata_port *ap = ata_shost_to_port(sdev->host);
1205 struct ata_device *dev;
1206 unsigned long flags;
1208 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1209 return sdev->queue_depth;
1211 dev = ata_scsi_find_dev(ap, sdev);
1212 if (!dev || !ata_dev_enabled(dev))
1213 return sdev->queue_depth;
1216 spin_lock_irqsave(ap->lock, flags);
1217 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1218 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1219 dev->flags |= ATA_DFLAG_NCQ_OFF;
1222 spin_unlock_irqrestore(ap->lock, flags);
1224 /* limit and apply queue depth */
1225 queue_depth = min(queue_depth, sdev->host->can_queue);
1226 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1227 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1229 if (sdev->queue_depth == queue_depth)
1232 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
1236 /* XXX: for spindown warning */
1237 static void ata_delayed_done_timerfn(unsigned long arg)
1239 struct scsi_cmnd *scmd = (void *)arg;
1241 scmd->scsi_done(scmd);
1244 /* XXX: for spindown warning */
1245 static void ata_delayed_done(struct scsi_cmnd *scmd)
1247 static struct timer_list timer;
1249 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
1250 mod_timer(&timer, jiffies + 5 * HZ);
1254 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1255 * @qc: Storage for translated ATA taskfile
1257 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1258 * (to start). Perhaps these commands should be preceded by
1259 * CHECK POWER MODE to see what power mode the device is already in.
1260 * [See SAT revision 5 at www.t10.org]
1263 * spin_lock_irqsave(host lock)
1266 * Zero on success, non-zero on error.
1268 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1270 struct scsi_cmnd *scmd = qc->scsicmd;
1271 struct ata_taskfile *tf = &qc->tf;
1272 const u8 *cdb = scmd->cmnd;
1274 if (scmd->cmd_len < 5)
1277 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1278 tf->protocol = ATA_PROT_NODATA;
1280 ; /* ignore IMMED bit, violates sat-r05 */
1283 goto invalid_fld; /* LOEJ bit set not supported */
1284 if (((cdb[4] >> 4) & 0xf) != 0)
1285 goto invalid_fld; /* power conditions not supported */
1288 tf->nsect = 1; /* 1 sector, lba=0 */
1290 if (qc->dev->flags & ATA_DFLAG_LBA) {
1291 tf->flags |= ATA_TFLAG_LBA;
1296 tf->device |= ATA_LBA;
1299 tf->lbal = 0x1; /* sect */
1300 tf->lbam = 0x0; /* cyl low */
1301 tf->lbah = 0x0; /* cyl high */
1304 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1306 /* XXX: This is for backward compatibility, will be
1307 * removed. Read Documentation/feature-removal-schedule.txt
1310 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
1311 (system_state == SYSTEM_HALT ||
1312 system_state == SYSTEM_POWER_OFF)) {
1313 static unsigned long warned;
1315 if (!test_and_set_bit(0, &warned)) {
1316 ata_dev_printk(qc->dev, KERN_WARNING,
1317 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
1318 "UPDATE SHUTDOWN UTILITY\n");
1319 ata_dev_printk(qc->dev, KERN_WARNING,
1320 "For more info, visit "
1321 "http://linux-ata.org/shutdown.html\n");
1323 /* ->scsi_done is not used, use it for
1324 * delayed completion.
1326 scmd->scsi_done = qc->scsidone;
1327 qc->scsidone = ata_delayed_done;
1329 scmd->result = SAM_STAT_GOOD;
1333 /* Issue ATA STANDBY IMMEDIATE command */
1334 tf->command = ATA_CMD_STANDBYNOW1;
1338 * Standby and Idle condition timers could be implemented but that
1339 * would require libata to implement the Power condition mode page
1340 * and allow the user to change it. Changing mode pages requires
1341 * MODE SELECT to be implemented.
1347 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1348 /* "Invalid field in cbd" */
1354 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1355 * @qc: Storage for translated ATA taskfile
1357 * Sets up an ATA taskfile to issue FLUSH CACHE or
1361 * spin_lock_irqsave(host lock)
1364 * Zero on success, non-zero on error.
1366 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1368 struct ata_taskfile *tf = &qc->tf;
1370 tf->flags |= ATA_TFLAG_DEVICE;
1371 tf->protocol = ATA_PROT_NODATA;
1373 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1374 tf->command = ATA_CMD_FLUSH_EXT;
1376 tf->command = ATA_CMD_FLUSH;
1378 /* flush is critical for IO integrity, consider it an IO command */
1379 qc->flags |= ATA_QCFLAG_IO;
1385 * scsi_6_lba_len - Get LBA and transfer length
1386 * @cdb: SCSI command to translate
1388 * Calculate LBA and transfer length for 6-byte commands.
1392 * @plen: the transfer length
1394 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1399 VPRINTK("six-byte command\n");
1401 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1402 lba |= ((u64)cdb[2]) << 8;
1403 lba |= ((u64)cdb[3]);
1412 * scsi_10_lba_len - Get LBA and transfer length
1413 * @cdb: SCSI command to translate
1415 * Calculate LBA and transfer length for 10-byte commands.
1419 * @plen: the transfer length
1421 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1426 VPRINTK("ten-byte command\n");
1428 lba |= ((u64)cdb[2]) << 24;
1429 lba |= ((u64)cdb[3]) << 16;
1430 lba |= ((u64)cdb[4]) << 8;
1431 lba |= ((u64)cdb[5]);
1433 len |= ((u32)cdb[7]) << 8;
1434 len |= ((u32)cdb[8]);
1441 * scsi_16_lba_len - Get LBA and transfer length
1442 * @cdb: SCSI command to translate
1444 * Calculate LBA and transfer length for 16-byte commands.
1448 * @plen: the transfer length
1450 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1455 VPRINTK("sixteen-byte command\n");
1457 lba |= ((u64)cdb[2]) << 56;
1458 lba |= ((u64)cdb[3]) << 48;
1459 lba |= ((u64)cdb[4]) << 40;
1460 lba |= ((u64)cdb[5]) << 32;
1461 lba |= ((u64)cdb[6]) << 24;
1462 lba |= ((u64)cdb[7]) << 16;
1463 lba |= ((u64)cdb[8]) << 8;
1464 lba |= ((u64)cdb[9]);
1466 len |= ((u32)cdb[10]) << 24;
1467 len |= ((u32)cdb[11]) << 16;
1468 len |= ((u32)cdb[12]) << 8;
1469 len |= ((u32)cdb[13]);
1476 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1477 * @qc: Storage for translated ATA taskfile
1479 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1482 * spin_lock_irqsave(host lock)
1485 * Zero on success, non-zero on error.
1487 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1489 struct scsi_cmnd *scmd = qc->scsicmd;
1490 struct ata_taskfile *tf = &qc->tf;
1491 struct ata_device *dev = qc->dev;
1492 u64 dev_sectors = qc->dev->n_sectors;
1493 const u8 *cdb = scmd->cmnd;
1497 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1498 tf->protocol = ATA_PROT_NODATA;
1500 if (cdb[0] == VERIFY) {
1501 if (scmd->cmd_len < 10)
1503 scsi_10_lba_len(cdb, &block, &n_block);
1504 } else if (cdb[0] == VERIFY_16) {
1505 if (scmd->cmd_len < 16)
1507 scsi_16_lba_len(cdb, &block, &n_block);
1513 if (block >= dev_sectors)
1515 if ((block + n_block) > dev_sectors)
1518 if (dev->flags & ATA_DFLAG_LBA) {
1519 tf->flags |= ATA_TFLAG_LBA;
1521 if (lba_28_ok(block, n_block)) {
1523 tf->command = ATA_CMD_VERIFY;
1524 tf->device |= (block >> 24) & 0xf;
1525 } else if (lba_48_ok(block, n_block)) {
1526 if (!(dev->flags & ATA_DFLAG_LBA48))
1530 tf->flags |= ATA_TFLAG_LBA48;
1531 tf->command = ATA_CMD_VERIFY_EXT;
1533 tf->hob_nsect = (n_block >> 8) & 0xff;
1535 tf->hob_lbah = (block >> 40) & 0xff;
1536 tf->hob_lbam = (block >> 32) & 0xff;
1537 tf->hob_lbal = (block >> 24) & 0xff;
1539 /* request too large even for LBA48 */
1542 tf->nsect = n_block & 0xff;
1544 tf->lbah = (block >> 16) & 0xff;
1545 tf->lbam = (block >> 8) & 0xff;
1546 tf->lbal = block & 0xff;
1548 tf->device |= ATA_LBA;
1551 u32 sect, head, cyl, track;
1553 if (!lba_28_ok(block, n_block))
1556 /* Convert LBA to CHS */
1557 track = (u32)block / dev->sectors;
1558 cyl = track / dev->heads;
1559 head = track % dev->heads;
1560 sect = (u32)block % dev->sectors + 1;
1562 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1563 (u32)block, track, cyl, head, sect);
1565 /* Check whether the converted CHS can fit.
1569 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1572 tf->command = ATA_CMD_VERIFY;
1573 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1576 tf->lbah = cyl >> 8;
1583 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1584 /* "Invalid field in cbd" */
1588 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1589 /* "Logical Block Address out of range" */
1593 scmd->result = SAM_STAT_GOOD;
1598 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1599 * @qc: Storage for translated ATA taskfile
1601 * Converts any of six SCSI read/write commands into the
1602 * ATA counterpart, including starting sector (LBA),
1603 * sector count, and taking into account the device's LBA48
1606 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1607 * %WRITE_16 are currently supported.
1610 * spin_lock_irqsave(host lock)
1613 * Zero on success, non-zero on error.
1615 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1617 struct scsi_cmnd *scmd = qc->scsicmd;
1618 const u8 *cdb = scmd->cmnd;
1619 unsigned int tf_flags = 0;
1624 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1625 tf_flags |= ATA_TFLAG_WRITE;
1627 /* Calculate the SCSI LBA, transfer length and FUA. */
1631 if (unlikely(scmd->cmd_len < 10))
1633 scsi_10_lba_len(cdb, &block, &n_block);
1634 if (unlikely(cdb[1] & (1 << 3)))
1635 tf_flags |= ATA_TFLAG_FUA;
1639 if (unlikely(scmd->cmd_len < 6))
1641 scsi_6_lba_len(cdb, &block, &n_block);
1643 /* for 6-byte r/w commands, transfer length 0
1644 * means 256 blocks of data, not 0 block.
1651 if (unlikely(scmd->cmd_len < 16))
1653 scsi_16_lba_len(cdb, &block, &n_block);
1654 if (unlikely(cdb[1] & (1 << 3)))
1655 tf_flags |= ATA_TFLAG_FUA;
1658 DPRINTK("no-byte command\n");
1662 /* Check and compose ATA command */
1664 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1665 * length 0 means transfer 0 block of data.
1666 * However, for ATA R/W commands, sector count 0 means
1667 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1669 * WARNING: one or two older ATA drives treat 0 as 0...
1673 qc->flags |= ATA_QCFLAG_IO;
1674 qc->nbytes = n_block * ATA_SECT_SIZE;
1676 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1678 if (likely(rc == 0))
1683 /* treat all other errors as -EINVAL, fall through */
1685 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1686 /* "Invalid field in cbd" */
1690 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1691 /* "Logical Block Address out of range" */
1695 scmd->result = SAM_STAT_GOOD;
1699 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1701 struct ata_port *ap = qc->ap;
1702 struct scsi_cmnd *cmd = qc->scsicmd;
1703 u8 *cdb = cmd->cmnd;
1704 int need_sense = (qc->err_mask != 0);
1706 /* For ATA pass thru (SAT) commands, generate a sense block if
1707 * user mandated it or if there's an error. Note that if we
1708 * generate because the user forced us to, a check condition
1709 * is generated and the ATA register values are returned
1710 * whether the command completed successfully or not. If there
1711 * was no error, SK, ASC and ASCQ will all be zero.
1713 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1714 ((cdb[2] & 0x20) || need_sense)) {
1715 ata_gen_passthru_sense(qc);
1718 cmd->result = SAM_STAT_GOOD;
1720 /* TODO: decide which descriptor format to use
1721 * for 48b LBA devices and call that here
1722 * instead of the fixed desc, which is only
1723 * good for smaller LBA (and maybe CHS?)
1726 ata_gen_ata_sense(qc);
1730 /* XXX: track spindown state for spindown skipping and warning */
1731 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1732 qc->tf.command == ATA_CMD_STANDBYNOW1))
1733 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1734 else if (likely(system_state != SYSTEM_HALT &&
1735 system_state != SYSTEM_POWER_OFF))
1736 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1738 if (need_sense && !ap->ops->error_handler)
1739 ata_dump_status(ap->print_id, &qc->result_tf);
1747 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1748 * @dev: ATA device to which the command is addressed
1749 * @cmd: SCSI command to execute
1750 * @done: SCSI command completion function
1751 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1753 * Our ->queuecommand() function has decided that the SCSI
1754 * command issued can be directly translated into an ATA
1755 * command, rather than handled internally.
1757 * This function sets up an ata_queued_cmd structure for the
1758 * SCSI command, and sends that ata_queued_cmd to the hardware.
1760 * The xlat_func argument (actor) returns 0 if ready to execute
1761 * ATA command, else 1 to finish translation. If 1 is returned
1762 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1763 * to be set reflecting an error condition or clean (early)
1767 * spin_lock_irqsave(host lock)
1770 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1771 * needs to be deferred.
1773 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1774 void (*done)(struct scsi_cmnd *),
1775 ata_xlat_func_t xlat_func)
1777 struct ata_port *ap = dev->link->ap;
1778 struct ata_queued_cmd *qc;
1783 qc = ata_scsi_qc_new(dev, cmd, done);
1787 /* data is present; dma-map it */
1788 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1789 cmd->sc_data_direction == DMA_TO_DEVICE) {
1790 if (unlikely(scsi_bufflen(cmd) < 1)) {
1791 ata_dev_printk(dev, KERN_WARNING,
1792 "WARNING: zero len r/w req\n");
1796 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1798 qc->dma_dir = cmd->sc_data_direction;
1801 qc->complete_fn = ata_scsi_qc_complete;
1806 if (ap->ops->qc_defer) {
1807 if ((rc = ap->ops->qc_defer(qc)))
1811 /* select device, send command to hardware */
1820 DPRINTK("EXIT - early finish (good or error)\n");
1825 cmd->result = (DID_ERROR << 16);
1828 DPRINTK("EXIT - internal\n");
1833 DPRINTK("EXIT - defer\n");
1834 if (rc == ATA_DEFER_LINK)
1835 return SCSI_MLQUEUE_DEVICE_BUSY;
1837 return SCSI_MLQUEUE_HOST_BUSY;
1841 * ata_scsi_rbuf_get - Map response buffer.
1842 * @cmd: SCSI command containing buffer to be mapped.
1843 * @flags: unsigned long variable to store irq enable status
1844 * @copy_in: copy in from user buffer
1846 * Prepare buffer for simulated SCSI commands.
1849 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1852 * Pointer to response buffer.
1854 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1855 unsigned long *flags)
1857 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1859 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1861 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1862 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1863 return ata_scsi_rbuf;
1867 * ata_scsi_rbuf_put - Unmap response buffer.
1868 * @cmd: SCSI command containing buffer to be unmapped.
1869 * @copy_out: copy out result
1870 * @flags: @flags passed to ata_scsi_rbuf_get()
1872 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1873 * @copy_back is true.
1876 * Unlocks ata_scsi_rbuf_lock.
1878 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1879 unsigned long *flags)
1882 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1883 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1884 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1888 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1889 * @args: device IDENTIFY data / SCSI command of interest.
1890 * @actor: Callback hook for desired SCSI command simulator
1892 * Takes care of the hard work of simulating a SCSI command...
1893 * Mapping the response buffer, calling the command's handler,
1894 * and handling the handler's return value. This return value
1895 * indicates whether the handler wishes the SCSI command to be
1896 * completed successfully (0), or not (in which case cmd->result
1897 * and sense buffer are assumed to be set).
1900 * spin_lock_irqsave(host lock)
1902 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1903 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1907 struct scsi_cmnd *cmd = args->cmd;
1908 unsigned long flags;
1910 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1911 rc = actor(args, rbuf);
1912 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
1915 cmd->result = SAM_STAT_GOOD;
1920 * ata_scsiop_inq_std - Simulate INQUIRY command
1921 * @args: device IDENTIFY data / SCSI command of interest.
1922 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1924 * Returns standard device identification data associated
1925 * with non-VPD INQUIRY command output.
1928 * spin_lock_irqsave(host lock)
1930 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1932 const u8 versions[] = {
1933 0x60, /* SAM-3 (no version claimed) */
1936 0x20, /* SBC-2 (no version claimed) */
1939 0x60 /* SPC-3 (no version claimed) */
1944 0x5, /* claim SPC-3 version compatibility */
1951 /* set scsi removeable (RMB) bit per ata bit */
1952 if (ata_id_removeable(args->id))
1955 memcpy(rbuf, hdr, sizeof(hdr));
1956 memcpy(&rbuf[8], "ATA ", 8);
1957 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1958 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1960 if (rbuf[32] == 0 || rbuf[32] == ' ')
1961 memcpy(&rbuf[32], "n/a ", 4);
1963 memcpy(rbuf + 59, versions, sizeof(versions));
1969 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1970 * @args: device IDENTIFY data / SCSI command of interest.
1971 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1973 * Returns list of inquiry VPD pages available.
1976 * spin_lock_irqsave(host lock)
1978 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1980 const u8 pages[] = {
1981 0x00, /* page 0x00, this page */
1982 0x80, /* page 0x80, unit serial no page */
1983 0x83, /* page 0x83, device ident page */
1984 0x89, /* page 0x89, ata info page */
1985 0xb1, /* page 0xb1, block device characteristics page */
1988 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1989 memcpy(rbuf + 4, pages, sizeof(pages));
1994 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1995 * @args: device IDENTIFY data / SCSI command of interest.
1996 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1998 * Returns ATA device serial number.
2001 * spin_lock_irqsave(host lock)
2003 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2007 0x80, /* this page code */
2009 ATA_ID_SERNO_LEN, /* page len */
2012 memcpy(rbuf, hdr, sizeof(hdr));
2013 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2014 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2019 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2020 * @args: device IDENTIFY data / SCSI command of interest.
2021 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2023 * Yields two logical unit device identification designators:
2024 * - vendor specific ASCII containing the ATA serial number
2025 * - SAT defined "t10 vendor id based" containing ASCII vendor
2026 * name ("ATA "), model and serial numbers.
2029 * spin_lock_irqsave(host lock)
2031 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2033 const int sat_model_serial_desc_len = 68;
2036 rbuf[1] = 0x83; /* this page code */
2039 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2041 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2043 ata_id_string(args->id, (unsigned char *) rbuf + num,
2044 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2045 num += ATA_ID_SERNO_LEN;
2047 /* SAT defined lu model and serial numbers descriptor */
2048 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2051 rbuf[num + 3] = sat_model_serial_desc_len;
2053 memcpy(rbuf + num, "ATA ", 8);
2055 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2057 num += ATA_ID_PROD_LEN;
2058 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2060 num += ATA_ID_SERNO_LEN;
2062 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2067 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2068 * @args: device IDENTIFY data / SCSI command of interest.
2069 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2071 * Yields SAT-specified ATA VPD page.
2074 * spin_lock_irqsave(host lock)
2076 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2078 struct ata_taskfile tf;
2080 memset(&tf, 0, sizeof(tf));
2082 rbuf[1] = 0x89; /* our page code */
2083 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2084 rbuf[3] = (0x238 & 0xff);
2086 memcpy(&rbuf[8], "linux ", 8);
2087 memcpy(&rbuf[16], "libata ", 16);
2088 memcpy(&rbuf[32], DRV_VERSION, 4);
2089 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2091 /* we don't store the ATA device signature, so we fake it */
2093 tf.command = ATA_DRDY; /* really, this is Status reg */
2097 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2098 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2100 rbuf[56] = ATA_CMD_ID_ATA;
2102 memcpy(&rbuf[60], &args->id[0], 512);
2106 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2110 if (ata_id_major_version(args->id) > 7) {
2111 rbuf[4] = args->id[217] >> 8;
2112 rbuf[5] = args->id[217];
2113 rbuf[7] = args->id[168] & 0xf;
2120 * ata_scsiop_noop - Command handler that simply returns success.
2121 * @args: device IDENTIFY data / SCSI command of interest.
2122 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2124 * No operation. Simply returns success to caller, to indicate
2125 * that the caller should successfully complete this SCSI command.
2128 * spin_lock_irqsave(host lock)
2130 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
2137 * ata_msense_caching - Simulate MODE SENSE caching info page
2138 * @id: device IDENTIFY data
2139 * @buf: output buffer
2141 * Generate a caching info page, which conditionally indicates
2142 * write caching to the SCSI layer, depending on device
2148 static unsigned int ata_msense_caching(u16 *id, u8 *buf)
2150 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
2151 if (ata_id_wcache_enabled(id))
2152 buf[2] |= (1 << 2); /* write cache enable */
2153 if (!ata_id_rahead_enabled(id))
2154 buf[12] |= (1 << 5); /* disable read ahead */
2155 return sizeof(def_cache_mpage);
2159 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2160 * @buf: output buffer
2162 * Generate a generic MODE SENSE control mode page.
2167 static unsigned int ata_msense_ctl_mode(u8 *buf)
2169 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
2170 return sizeof(def_control_mpage);
2174 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2175 * @buf: output buffer
2177 * Generate a generic MODE SENSE r/w error recovery page.
2182 static unsigned int ata_msense_rw_recovery(u8 *buf)
2184 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
2185 return sizeof(def_rw_recovery_mpage);
2189 * We can turn this into a real blacklist if it's needed, for now just
2190 * blacklist any Maxtor BANC1G10 revision firmware
2192 static int ata_dev_supports_fua(u16 *id)
2194 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2198 if (!ata_id_has_fua(id))
2201 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2202 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2204 if (strcmp(model, "Maxtor"))
2206 if (strcmp(fw, "BANC1G10"))
2209 return 0; /* blacklisted */
2213 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2214 * @args: device IDENTIFY data / SCSI command of interest.
2215 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2217 * Simulate MODE SENSE commands. Assume this is invoked for direct
2218 * access devices (e.g. disks) only. There should be no block
2219 * descriptor for other device types.
2222 * spin_lock_irqsave(host lock)
2224 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2226 struct ata_device *dev = args->dev;
2227 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2228 const u8 sat_blk_desc[] = {
2229 0, 0, 0, 0, /* number of blocks: sat unspecified */
2231 0, 0x2, 0x0 /* block length: 512 bytes */
2234 unsigned int ebd, page_control, six_byte;
2239 six_byte = (scsicmd[0] == MODE_SENSE);
2240 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2242 * LLBA bit in msense(10) ignored (compliant)
2245 page_control = scsicmd[2] >> 6;
2246 switch (page_control) {
2247 case 0: /* current */
2248 break; /* supported */
2250 goto saving_not_supp;
2251 case 1: /* changeable */
2252 case 2: /* defaults */
2258 p += 4 + (ebd ? 8 : 0);
2260 p += 8 + (ebd ? 8 : 0);
2262 pg = scsicmd[2] & 0x3f;
2265 * No mode subpages supported (yet) but asking for _all_
2266 * subpages may be valid
2268 if (spg && (spg != ALL_SUB_MPAGES))
2272 case RW_RECOVERY_MPAGE:
2273 p += ata_msense_rw_recovery(p);
2277 p += ata_msense_caching(args->id, p);
2281 p += ata_msense_ctl_mode(p);
2285 p += ata_msense_rw_recovery(p);
2286 p += ata_msense_caching(args->id, p);
2287 p += ata_msense_ctl_mode(p);
2290 default: /* invalid page code */
2295 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2296 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2300 rbuf[0] = p - rbuf - 1;
2303 rbuf[3] = sizeof(sat_blk_desc);
2304 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2307 unsigned int output_len = p - rbuf - 2;
2309 rbuf[0] = output_len >> 8;
2310 rbuf[1] = output_len;
2313 rbuf[7] = sizeof(sat_blk_desc);
2314 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2320 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2321 /* "Invalid field in cbd" */
2325 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2326 /* "Saving parameters not supported" */
2331 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2332 * @args: device IDENTIFY data / SCSI command of interest.
2333 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2335 * Simulate READ CAPACITY commands.
2340 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2342 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
2346 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2347 if (last_lba >= 0xffffffffULL)
2348 last_lba = 0xffffffff;
2350 /* sector count, 32-bit */
2351 rbuf[0] = last_lba >> (8 * 3);
2352 rbuf[1] = last_lba >> (8 * 2);
2353 rbuf[2] = last_lba >> (8 * 1);
2357 rbuf[6] = ATA_SECT_SIZE >> 8;
2358 rbuf[7] = ATA_SECT_SIZE & 0xff;
2360 /* sector count, 64-bit */
2361 rbuf[0] = last_lba >> (8 * 7);
2362 rbuf[1] = last_lba >> (8 * 6);
2363 rbuf[2] = last_lba >> (8 * 5);
2364 rbuf[3] = last_lba >> (8 * 4);
2365 rbuf[4] = last_lba >> (8 * 3);
2366 rbuf[5] = last_lba >> (8 * 2);
2367 rbuf[6] = last_lba >> (8 * 1);
2371 rbuf[10] = ATA_SECT_SIZE >> 8;
2372 rbuf[11] = ATA_SECT_SIZE & 0xff;
2379 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2380 * @args: device IDENTIFY data / SCSI command of interest.
2381 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2383 * Simulate REPORT LUNS command.
2386 * spin_lock_irqsave(host lock)
2388 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2391 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2396 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2398 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2399 /* FIXME: not quite right; we don't want the
2400 * translation of taskfile registers into
2401 * a sense descriptors, since that's only
2402 * correct for ATA, not ATAPI
2404 ata_gen_passthru_sense(qc);
2407 qc->scsidone(qc->scsicmd);
2411 /* is it pointless to prefer PIO for "safety reasons"? */
2412 static inline int ata_pio_use_silly(struct ata_port *ap)
2414 return (ap->flags & ATA_FLAG_PIO_DMA);
2417 static void atapi_request_sense(struct ata_queued_cmd *qc)
2419 struct ata_port *ap = qc->ap;
2420 struct scsi_cmnd *cmd = qc->scsicmd;
2422 DPRINTK("ATAPI request sense\n");
2424 /* FIXME: is this needed? */
2425 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2427 #ifdef CONFIG_ATA_SFF
2428 if (ap->ops->sff_tf_read)
2429 ap->ops->sff_tf_read(ap, &qc->tf);
2432 /* fill these in, for the case where they are -not- overwritten */
2433 cmd->sense_buffer[0] = 0x70;
2434 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2438 /* setup sg table and init transfer direction */
2439 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2440 ata_sg_init(qc, &qc->sgent, 1);
2441 qc->dma_dir = DMA_FROM_DEVICE;
2443 memset(&qc->cdb, 0, qc->dev->cdb_len);
2444 qc->cdb[0] = REQUEST_SENSE;
2445 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2447 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2448 qc->tf.command = ATA_CMD_PACKET;
2450 if (ata_pio_use_silly(ap)) {
2451 qc->tf.protocol = ATAPI_PROT_DMA;
2452 qc->tf.feature |= ATAPI_PKT_DMA;
2454 qc->tf.protocol = ATAPI_PROT_PIO;
2455 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2458 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2460 qc->complete_fn = atapi_sense_complete;
2467 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2469 struct scsi_cmnd *cmd = qc->scsicmd;
2470 unsigned int err_mask = qc->err_mask;
2472 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2474 /* handle completion from new EH */
2475 if (unlikely(qc->ap->ops->error_handler &&
2476 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2478 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2479 /* FIXME: not quite right; we don't want the
2480 * translation of taskfile registers into a
2481 * sense descriptors, since that's only
2482 * correct for ATA, not ATAPI
2484 ata_gen_passthru_sense(qc);
2487 /* SCSI EH automatically locks door if sdev->locked is
2488 * set. Sometimes door lock request continues to
2489 * fail, for example, when no media is present. This
2490 * creates a loop - SCSI EH issues door lock which
2491 * fails and gets invoked again to acquire sense data
2492 * for the failed command.
2494 * If door lock fails, always clear sdev->locked to
2495 * avoid this infinite loop.
2497 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2498 qc->dev->sdev->locked = 0;
2500 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2506 /* successful completion or old EH failure path */
2507 if (unlikely(err_mask & AC_ERR_DEV)) {
2508 cmd->result = SAM_STAT_CHECK_CONDITION;
2509 atapi_request_sense(qc);
2511 } else if (unlikely(err_mask)) {
2512 /* FIXME: not quite right; we don't want the
2513 * translation of taskfile registers into
2514 * a sense descriptors, since that's only
2515 * correct for ATA, not ATAPI
2517 ata_gen_passthru_sense(qc);
2519 u8 *scsicmd = cmd->cmnd;
2521 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2522 unsigned long flags;
2525 buf = ata_scsi_rbuf_get(cmd, true, &flags);
2527 /* ATAPI devices typically report zero for their SCSI version,
2528 * and sometimes deviate from the spec WRT response data
2529 * format. If SCSI version is reported as zero like normal,
2530 * then we make the following fixups: 1) Fake MMC-5 version,
2531 * to indicate to the Linux scsi midlayer this is a modern
2532 * device. 2) Ensure response data format / ATAPI information
2533 * are always correct.
2540 ata_scsi_rbuf_put(cmd, true, &flags);
2543 cmd->result = SAM_STAT_GOOD;
2550 * atapi_xlat - Initialize PACKET taskfile
2551 * @qc: command structure to be initialized
2554 * spin_lock_irqsave(host lock)
2557 * Zero on success, non-zero on failure.
2559 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2561 struct scsi_cmnd *scmd = qc->scsicmd;
2562 struct ata_device *dev = qc->dev;
2563 int nodata = (scmd->sc_data_direction == DMA_NONE);
2564 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2565 unsigned int nbytes;
2567 memset(qc->cdb, 0, dev->cdb_len);
2568 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2570 qc->complete_fn = atapi_qc_complete;
2572 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2573 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2574 qc->tf.flags |= ATA_TFLAG_WRITE;
2575 DPRINTK("direction: write\n");
2578 qc->tf.command = ATA_CMD_PACKET;
2579 ata_qc_set_pc_nbytes(qc);
2581 /* check whether ATAPI DMA is safe */
2582 if (!nodata && !using_pio && atapi_check_dma(qc))
2585 /* Some controller variants snoop this value for Packet
2586 * transfers to do state machine and FIFO management. Thus we
2587 * want to set it properly, and for DMA where it is
2588 * effectively meaningless.
2590 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2592 /* Most ATAPI devices which honor transfer chunk size don't
2593 * behave according to the spec when odd chunk size which
2594 * matches the transfer length is specified. If the number of
2595 * bytes to transfer is 2n+1. According to the spec, what
2596 * should happen is to indicate that 2n+1 is going to be
2597 * transferred and transfer 2n+2 bytes where the last byte is
2600 * In practice, this doesn't happen. ATAPI devices first
2601 * indicate and transfer 2n bytes and then indicate and
2602 * transfer 2 bytes where the last byte is padding.
2604 * This inconsistency confuses several controllers which
2605 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2606 * These controllers use actual number of transferred bytes to
2607 * update DMA poitner and transfer of 4n+2 bytes make those
2608 * controller push DMA pointer by 4n+4 bytes because SATA data
2609 * FISes are aligned to 4 bytes. This causes data corruption
2610 * and buffer overrun.
2612 * Always setting nbytes to even number solves this problem
2613 * because then ATAPI devices don't have to split data at 2n
2619 qc->tf.lbam = (nbytes & 0xFF);
2620 qc->tf.lbah = (nbytes >> 8);
2623 qc->tf.protocol = ATAPI_PROT_NODATA;
2625 qc->tf.protocol = ATAPI_PROT_PIO;
2628 qc->tf.protocol = ATAPI_PROT_DMA;
2629 qc->tf.feature |= ATAPI_PKT_DMA;
2631 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2632 (scmd->sc_data_direction != DMA_TO_DEVICE))
2633 /* some SATA bridges need us to indicate data xfer direction */
2634 qc->tf.feature |= ATAPI_DMADIR;
2638 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2639 as ATAPI tape drives don't get this right otherwise */
2643 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2645 if (!sata_pmp_attached(ap)) {
2646 if (likely(devno < ata_link_max_devices(&ap->link)))
2647 return &ap->link.device[devno];
2649 if (likely(devno < ap->nr_pmp_links))
2650 return &ap->pmp_link[devno].device[0];
2656 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2657 const struct scsi_device *scsidev)
2661 /* skip commands not addressed to targets we simulate */
2662 if (!sata_pmp_attached(ap)) {
2663 if (unlikely(scsidev->channel || scsidev->lun))
2665 devno = scsidev->id;
2667 if (unlikely(scsidev->id || scsidev->lun))
2669 devno = scsidev->channel;
2672 return ata_find_dev(ap, devno);
2676 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2677 * @ap: ATA port to which the device is attached
2678 * @scsidev: SCSI device from which we derive the ATA device
2680 * Given various information provided in struct scsi_cmnd,
2681 * map that onto an ATA bus, and using that mapping
2682 * determine which ata_device is associated with the
2683 * SCSI command to be sent.
2686 * spin_lock_irqsave(host lock)
2689 * Associated ATA device, or %NULL if not found.
2691 static struct ata_device *
2692 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2694 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2696 if (unlikely(!dev || !ata_dev_enabled(dev)))
2703 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2704 * @byte1: Byte 1 from pass-thru CDB.
2707 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2710 ata_scsi_map_proto(u8 byte1)
2712 switch((byte1 & 0x1e) >> 1) {
2713 case 3: /* Non-data */
2714 return ATA_PROT_NODATA;
2717 case 10: /* UDMA Data-in */
2718 case 11: /* UDMA Data-Out */
2719 return ATA_PROT_DMA;
2721 case 4: /* PIO Data-in */
2722 case 5: /* PIO Data-out */
2723 return ATA_PROT_PIO;
2725 case 0: /* Hard Reset */
2727 case 8: /* Device Diagnostic */
2728 case 9: /* Device Reset */
2729 case 7: /* DMA Queued */
2730 case 12: /* FPDMA */
2731 case 15: /* Return Response Info */
2732 default: /* Reserved */
2736 return ATA_PROT_UNKNOWN;
2740 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2741 * @qc: command structure to be initialized
2743 * Handles either 12 or 16-byte versions of the CDB.
2746 * Zero on success, non-zero on failure.
2748 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2750 struct ata_taskfile *tf = &(qc->tf);
2751 struct scsi_cmnd *scmd = qc->scsicmd;
2752 struct ata_device *dev = qc->dev;
2753 const u8 *cdb = scmd->cmnd;
2755 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2759 * Filter TPM commands by default. These provide an
2760 * essentially uncontrolled encrypted "back door" between
2761 * applications and the disk. Set libata.allow_tpm=1 if you
2762 * have a real reason for wanting to use them. This ensures
2763 * that installed software cannot easily mess stuff up without
2764 * user intent. DVR type users will probably ship with this enabled
2765 * for movie content management.
2767 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2768 * for this and should do in future but that it is not sufficient as
2769 * DCS is an optional feature set. Thus we also do the software filter
2770 * so that we comply with the TC consortium stated goal that the user
2771 * can turn off TC features of their system.
2773 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
2776 /* We may not issue DMA commands if no DMA mode is set */
2777 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2781 * 12 and 16 byte CDBs use different offsets to
2782 * provide the various register values.
2784 if (cdb[0] == ATA_16) {
2786 * 16-byte CDB - may contain extended commands.
2788 * If that is the case, copy the upper byte register values.
2790 if (cdb[1] & 0x01) {
2791 tf->hob_feature = cdb[3];
2792 tf->hob_nsect = cdb[5];
2793 tf->hob_lbal = cdb[7];
2794 tf->hob_lbam = cdb[9];
2795 tf->hob_lbah = cdb[11];
2796 tf->flags |= ATA_TFLAG_LBA48;
2798 tf->flags &= ~ATA_TFLAG_LBA48;
2801 * Always copy low byte, device and command registers.
2803 tf->feature = cdb[4];
2808 tf->device = cdb[13];
2809 tf->command = cdb[14];
2812 * 12-byte CDB - incapable of extended commands.
2814 tf->flags &= ~ATA_TFLAG_LBA48;
2816 tf->feature = cdb[3];
2821 tf->device = cdb[8];
2822 tf->command = cdb[9];
2825 /* enforce correct master/slave bit */
2826 tf->device = dev->devno ?
2827 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2829 /* sanity check for pio multi commands */
2830 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2833 if (is_multi_taskfile(tf)) {
2834 unsigned int multi_count = 1 << (cdb[1] >> 5);
2836 /* compare the passed through multi_count
2837 * with the cached multi_count of libata
2839 if (multi_count != dev->multi_count)
2840 ata_dev_printk(dev, KERN_WARNING,
2841 "invalid multi_count %u ignored\n",
2845 /* READ/WRITE LONG use a non-standard sect_size */
2846 qc->sect_size = ATA_SECT_SIZE;
2847 switch (tf->command) {
2848 case ATA_CMD_READ_LONG:
2849 case ATA_CMD_READ_LONG_ONCE:
2850 case ATA_CMD_WRITE_LONG:
2851 case ATA_CMD_WRITE_LONG_ONCE:
2852 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2854 qc->sect_size = scsi_bufflen(scmd);
2858 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2859 * SET_FEATURES - XFER MODE must be preceded/succeeded
2860 * by an update to hardware-specific registers for each
2861 * controller (i.e. the reason for ->set_piomode(),
2862 * ->set_dmamode(), and ->post_set_mode() hooks).
2864 if ((tf->command == ATA_CMD_SET_FEATURES)
2865 && (tf->feature == SETFEATURES_XFER))
2869 * Set flags so that all registers will be written,
2870 * and pass on write indication (used for PIO/DMA
2873 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2875 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2876 tf->flags |= ATA_TFLAG_WRITE;
2879 * Set transfer length.
2881 * TODO: find out if we need to do more here to
2882 * cover scatter/gather case.
2884 ata_qc_set_pc_nbytes(qc);
2886 /* request result TF and be quiet about device error */
2887 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2892 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
2893 /* "Invalid field in cdb" */
2898 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2900 * @cmd: SCSI command opcode to consider
2902 * Look up the SCSI command given, and determine whether the
2903 * SCSI command is to be translated or simulated.
2906 * Pointer to translation function if possible, %NULL if not.
2909 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2919 return ata_scsi_rw_xlat;
2921 case SYNCHRONIZE_CACHE:
2922 if (ata_try_flush_cache(dev))
2923 return ata_scsi_flush_xlat;
2928 return ata_scsi_verify_xlat;
2932 return ata_scsi_pass_thru;
2935 return ata_scsi_start_stop_xlat;
2942 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2943 * @ap: ATA port to which the command was being sent
2944 * @cmd: SCSI command to dump
2946 * Prints the contents of a SCSI command via printk().
2949 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2950 struct scsi_cmnd *cmd)
2953 struct scsi_device *scsidev = cmd->device;
2954 u8 *scsicmd = cmd->cmnd;
2956 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2958 scsidev->channel, scsidev->id, scsidev->lun,
2959 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2960 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2965 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2966 void (*done)(struct scsi_cmnd *),
2967 struct ata_device *dev)
2969 u8 scsi_op = scmd->cmnd[0];
2970 ata_xlat_func_t xlat_func;
2973 if (dev->class == ATA_DEV_ATA) {
2974 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2977 xlat_func = ata_get_xlat_func(dev, scsi_op);
2979 if (unlikely(!scmd->cmd_len))
2983 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2984 /* relay SCSI command to ATAPI device */
2985 int len = COMMAND_SIZE(scsi_op);
2986 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
2989 xlat_func = atapi_xlat;
2991 /* ATA_16 passthru, treat as an ATA command */
2992 if (unlikely(scmd->cmd_len > 16))
2995 xlat_func = ata_get_xlat_func(dev, scsi_op);
3000 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
3002 ata_scsi_simulate(dev, scmd, done);
3007 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3008 scmd->cmd_len, scsi_op, dev->cdb_len);
3009 scmd->result = DID_ERROR << 16;
3015 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3016 * @cmd: SCSI command to be sent
3017 * @done: Completion function, called when command is complete
3019 * In some cases, this function translates SCSI commands into
3020 * ATA taskfiles, and queues the taskfiles to be sent to
3021 * hardware. In other cases, this function simulates a
3022 * SCSI device by evaluating and responding to certain
3023 * SCSI commands. This creates the overall effect of
3024 * ATA and ATAPI devices appearing as SCSI devices.
3027 * Releases scsi-layer-held lock, and obtains host lock.
3030 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3033 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
3035 struct ata_port *ap;
3036 struct ata_device *dev;
3037 struct scsi_device *scsidev = cmd->device;
3038 struct Scsi_Host *shost = scsidev->host;
3041 ap = ata_shost_to_port(shost);
3043 spin_unlock(shost->host_lock);
3044 spin_lock(ap->lock);
3046 ata_scsi_dump_cdb(ap, cmd);
3048 dev = ata_scsi_find_dev(ap, scsidev);
3050 rc = __ata_scsi_queuecmd(cmd, done, dev);
3052 cmd->result = (DID_BAD_TARGET << 16);
3056 spin_unlock(ap->lock);
3057 spin_lock(shost->host_lock);
3062 * ata_scsi_simulate - simulate SCSI command on ATA device
3063 * @dev: the target device
3064 * @cmd: SCSI command being sent to device.
3065 * @done: SCSI command completion function.
3067 * Interprets and directly executes a select list of SCSI commands
3068 * that can be handled internally.
3071 * spin_lock_irqsave(host lock)
3074 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
3075 void (*done)(struct scsi_cmnd *))
3077 struct ata_scsi_args args;
3078 const u8 *scsicmd = cmd->cmnd;
3086 switch(scsicmd[0]) {
3087 /* TODO: worth improving? */
3089 ata_scsi_invalid_field(cmd, done);
3093 if (scsicmd[1] & 2) /* is CmdDt set? */
3094 ata_scsi_invalid_field(cmd, done);
3095 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3096 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3097 else switch (scsicmd[2]) {
3099 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
3102 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
3105 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
3108 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3111 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3114 ata_scsi_invalid_field(cmd, done);
3121 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3124 case MODE_SELECT: /* unconditionally return */
3125 case MODE_SELECT_10: /* bad-field-in-cdb */
3126 ata_scsi_invalid_field(cmd, done);
3130 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3133 case SERVICE_ACTION_IN:
3134 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3135 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3137 ata_scsi_invalid_field(cmd, done);
3141 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3145 ata_scsi_set_sense(cmd, 0, 0, 0);
3146 cmd->result = (DRIVER_SENSE << 24);
3150 /* if we reach this, then writeback caching is disabled,
3151 * turning this into a no-op.
3153 case SYNCHRONIZE_CACHE:
3156 /* no-op's, complete with success */
3160 case TEST_UNIT_READY:
3161 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3164 case SEND_DIAGNOSTIC:
3165 tmp8 = scsicmd[1] & ~(1 << 3);
3166 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3167 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3169 ata_scsi_invalid_field(cmd, done);
3172 /* all other commands */
3174 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3175 /* "Invalid command operation code" */
3181 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3185 for (i = 0; i < host->n_ports; i++) {
3186 struct ata_port *ap = host->ports[i];
3187 struct Scsi_Host *shost;
3190 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3194 *(struct ata_port **)&shost->hostdata[0] = ap;
3195 ap->scsi_host = shost;
3197 shost->transportt = &ata_scsi_transport_template;
3198 shost->unique_id = ap->print_id;
3201 shost->max_channel = 1;
3202 shost->max_cmd_len = 16;
3204 /* Schedule policy is determined by ->qc_defer()
3205 * callback and it needs to see every deferred qc.
3206 * Set host_blocked to 1 to prevent SCSI midlayer from
3207 * automatically deferring requests.
3209 shost->max_host_blocked = 1;
3211 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3219 scsi_host_put(host->ports[i]->scsi_host);
3222 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3224 scsi_remove_host(shost);
3225 scsi_host_put(shost);
3230 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3233 struct ata_device *last_failed_dev = NULL;
3234 struct ata_link *link;
3235 struct ata_device *dev;
3237 if (ap->flags & ATA_FLAG_DISABLED)
3241 ata_for_each_link(link, ap, EDGE) {
3242 ata_for_each_dev(dev, link, ENABLED) {
3243 struct scsi_device *sdev;
3244 int channel = 0, id = 0;
3249 if (ata_is_host_link(link))
3252 channel = link->pmp;
3254 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3256 if (!IS_ERR(sdev)) {
3258 scsi_device_put(sdev);
3263 /* If we scanned while EH was in progress or allocation
3264 * failure occurred, scan would have failed silently. Check
3265 * whether all devices are attached.
3267 ata_for_each_link(link, ap, EDGE) {
3268 ata_for_each_dev(dev, link, ENABLED) {
3277 /* we're missing some SCSI devices */
3279 /* If caller requested synchrnous scan && we've made
3280 * any progress, sleep briefly and repeat.
3282 if (dev != last_failed_dev) {
3284 last_failed_dev = dev;
3288 /* We might be failing to detect boot device, give it
3289 * a few more chances.
3296 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3297 "failed without making any progress,\n"
3298 " switching to async\n");
3301 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3302 round_jiffies_relative(HZ));
3306 * ata_scsi_offline_dev - offline attached SCSI device
3307 * @dev: ATA device to offline attached SCSI device for
3309 * This function is called from ata_eh_hotplug() and responsible
3310 * for taking the SCSI device attached to @dev offline. This
3311 * function is called with host lock which protects dev->sdev
3315 * spin_lock_irqsave(host lock)
3318 * 1 if attached SCSI device exists, 0 otherwise.
3320 int ata_scsi_offline_dev(struct ata_device *dev)
3323 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3330 * ata_scsi_remove_dev - remove attached SCSI device
3331 * @dev: ATA device to remove attached SCSI device for
3333 * This function is called from ata_eh_scsi_hotplug() and
3334 * responsible for removing the SCSI device attached to @dev.
3337 * Kernel thread context (may sleep).
3339 static void ata_scsi_remove_dev(struct ata_device *dev)
3341 struct ata_port *ap = dev->link->ap;
3342 struct scsi_device *sdev;
3343 unsigned long flags;
3345 /* Alas, we need to grab scan_mutex to ensure SCSI device
3346 * state doesn't change underneath us and thus
3347 * scsi_device_get() always succeeds. The mutex locking can
3348 * be removed if there is __scsi_device_get() interface which
3349 * increments reference counts regardless of device state.
3351 mutex_lock(&ap->scsi_host->scan_mutex);
3352 spin_lock_irqsave(ap->lock, flags);
3354 /* clearing dev->sdev is protected by host lock */
3359 /* If user initiated unplug races with us, sdev can go
3360 * away underneath us after the host lock and
3361 * scan_mutex are released. Hold onto it.
3363 if (scsi_device_get(sdev) == 0) {
3364 /* The following ensures the attached sdev is
3365 * offline on return from ata_scsi_offline_dev()
3366 * regardless it wins or loses the race
3367 * against this function.
3369 scsi_device_set_state(sdev, SDEV_OFFLINE);
3376 spin_unlock_irqrestore(ap->lock, flags);
3377 mutex_unlock(&ap->scsi_host->scan_mutex);
3380 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3381 dev_name(&sdev->sdev_gendev));
3383 scsi_remove_device(sdev);
3384 scsi_device_put(sdev);
3388 static void ata_scsi_handle_link_detach(struct ata_link *link)
3390 struct ata_port *ap = link->ap;
3391 struct ata_device *dev;
3393 ata_for_each_dev(dev, link, ALL) {
3394 unsigned long flags;
3396 if (!(dev->flags & ATA_DFLAG_DETACHED))
3399 spin_lock_irqsave(ap->lock, flags);
3400 dev->flags &= ~ATA_DFLAG_DETACHED;
3401 spin_unlock_irqrestore(ap->lock, flags);
3403 ata_scsi_remove_dev(dev);
3408 * ata_scsi_media_change_notify - send media change event
3409 * @dev: Pointer to the disk device with media change event
3411 * Tell the block layer to send a media change notification
3415 * spin_lock_irqsave(host lock)
3417 void ata_scsi_media_change_notify(struct ata_device *dev)
3420 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3425 * ata_scsi_hotplug - SCSI part of hotplug
3426 * @work: Pointer to ATA port to perform SCSI hotplug on
3428 * Perform SCSI part of hotplug. It's executed from a separate
3429 * workqueue after EH completes. This is necessary because SCSI
3430 * hot plugging requires working EH and hot unplugging is
3431 * synchronized with hot plugging with a mutex.
3434 * Kernel thread context (may sleep).
3436 void ata_scsi_hotplug(struct work_struct *work)
3438 struct ata_port *ap =
3439 container_of(work, struct ata_port, hotplug_task.work);
3442 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3443 DPRINTK("ENTER/EXIT - unloading\n");
3449 /* Unplug detached devices. We cannot use link iterator here
3450 * because PMP links have to be scanned even if PMP is
3451 * currently not attached. Iterate manually.
3453 ata_scsi_handle_link_detach(&ap->link);
3455 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3456 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3458 /* scan for new ones */
3459 ata_scsi_scan_host(ap, 0);
3465 * ata_scsi_user_scan - indication for user-initiated bus scan
3466 * @shost: SCSI host to scan
3467 * @channel: Channel to scan
3471 * This function is called when user explicitly requests bus
3472 * scan. Set probe pending flag and invoke EH.
3475 * SCSI layer (we don't care)
3480 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3481 unsigned int id, unsigned int lun)
3483 struct ata_port *ap = ata_shost_to_port(shost);
3484 unsigned long flags;
3487 if (!ap->ops->error_handler)
3490 if (lun != SCAN_WILD_CARD && lun)
3493 if (!sata_pmp_attached(ap)) {
3494 if (channel != SCAN_WILD_CARD && channel)
3498 if (id != SCAN_WILD_CARD && id)
3503 spin_lock_irqsave(ap->lock, flags);
3505 if (devno == SCAN_WILD_CARD) {
3506 struct ata_link *link;
3508 ata_for_each_link(link, ap, EDGE) {
3509 struct ata_eh_info *ehi = &link->eh_info;
3510 ehi->probe_mask |= ATA_ALL_DEVICES;
3511 ehi->action |= ATA_EH_RESET;
3514 struct ata_device *dev = ata_find_dev(ap, devno);
3517 struct ata_eh_info *ehi = &dev->link->eh_info;
3518 ehi->probe_mask |= 1 << dev->devno;
3519 ehi->action |= ATA_EH_RESET;
3525 ata_port_schedule_eh(ap);
3526 spin_unlock_irqrestore(ap->lock, flags);
3527 ata_port_wait_eh(ap);
3529 spin_unlock_irqrestore(ap->lock, flags);
3535 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3536 * @work: Pointer to ATA port to perform scsi_rescan_device()
3538 * After ATA pass thru (SAT) commands are executed successfully,
3539 * libata need to propagate the changes to SCSI layer. This
3540 * function must be executed from ata_aux_wq such that sdev
3541 * attach/detach don't race with rescan.
3544 * Kernel thread context (may sleep).
3546 void ata_scsi_dev_rescan(struct work_struct *work)
3548 struct ata_port *ap =
3549 container_of(work, struct ata_port, scsi_rescan_task);
3550 struct ata_link *link;
3551 struct ata_device *dev;
3552 unsigned long flags;
3554 spin_lock_irqsave(ap->lock, flags);
3556 ata_for_each_link(link, ap, EDGE) {
3557 ata_for_each_dev(dev, link, ENABLED) {
3558 struct scsi_device *sdev = dev->sdev;
3562 if (scsi_device_get(sdev))
3565 spin_unlock_irqrestore(ap->lock, flags);
3566 scsi_rescan_device(&(sdev->sdev_gendev));
3567 scsi_device_put(sdev);
3568 spin_lock_irqsave(ap->lock, flags);
3572 spin_unlock_irqrestore(ap->lock, flags);
3576 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3577 * @host: ATA host container for all SAS ports
3578 * @port_info: Information from low-level host driver
3579 * @shost: SCSI host that the scsi device is attached to
3582 * PCI/etc. bus probe sem.
3585 * ata_port pointer on success / NULL on failure.
3588 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3589 struct ata_port_info *port_info,
3590 struct Scsi_Host *shost)
3592 struct ata_port *ap;
3594 ap = ata_port_alloc(host);
3599 ap->lock = shost->host_lock;
3600 ap->pio_mask = port_info->pio_mask;
3601 ap->mwdma_mask = port_info->mwdma_mask;
3602 ap->udma_mask = port_info->udma_mask;
3603 ap->flags |= port_info->flags;
3604 ap->ops = port_info->port_ops;
3605 ap->cbl = ATA_CBL_SATA;
3609 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3612 * ata_sas_port_start - Set port up for dma.
3613 * @ap: Port to initialize
3615 * Called just after data structures for each port are
3618 * May be used as the port_start() entry in ata_port_operations.
3621 * Inherited from caller.
3623 int ata_sas_port_start(struct ata_port *ap)
3627 EXPORT_SYMBOL_GPL(ata_sas_port_start);
3630 * ata_port_stop - Undo ata_sas_port_start()
3631 * @ap: Port to shut down
3633 * May be used as the port_stop() entry in ata_port_operations.
3636 * Inherited from caller.
3639 void ata_sas_port_stop(struct ata_port *ap)
3642 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3645 * ata_sas_port_init - Initialize a SATA device
3646 * @ap: SATA port to initialize
3649 * PCI/etc. bus probe sem.
3652 * Zero on success, non-zero on error.
3655 int ata_sas_port_init(struct ata_port *ap)
3657 int rc = ap->ops->port_start(ap);
3660 ap->print_id = ata_print_id++;
3661 rc = ata_bus_probe(ap);
3666 EXPORT_SYMBOL_GPL(ata_sas_port_init);
3669 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3670 * @ap: SATA port to destroy
3674 void ata_sas_port_destroy(struct ata_port *ap)
3676 if (ap->ops->port_stop)
3677 ap->ops->port_stop(ap);
3680 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3683 * ata_sas_slave_configure - Default slave_config routine for libata devices
3684 * @sdev: SCSI device to configure
3685 * @ap: ATA port to which SCSI device is attached
3691 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3693 ata_scsi_sdev_config(sdev);
3694 ata_scsi_dev_config(sdev, ap->link.device);
3697 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3700 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3701 * @cmd: SCSI command to be sent
3702 * @done: Completion function, called when command is complete
3703 * @ap: ATA port to which the command is being sent
3706 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3710 int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3711 struct ata_port *ap)
3715 ata_scsi_dump_cdb(ap, cmd);
3717 if (likely(ata_dev_enabled(ap->link.device)))
3718 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
3720 cmd->result = (DID_BAD_TARGET << 16);
3725 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);