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 scsi_device *sdev, void __user *arg)
428 struct ata_port *ap = ata_shost_to_port(sdev->host);
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);
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);
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_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
650 int val = -EINVAL, rc = -EINVAL;
653 case ATA_IOC_GET_IO32:
655 if (copy_to_user(arg, &val, 1))
659 case ATA_IOC_SET_IO32:
660 val = (unsigned long) arg;
665 case HDIO_GET_IDENTITY:
666 return ata_get_identity(scsidev, arg);
669 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
671 return ata_cmd_ioctl(scsidev, arg);
673 case HDIO_DRIVE_TASK:
674 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
676 return ata_task_ioctl(scsidev, arg);
687 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
688 * @dev: ATA device to which the new command is attached
689 * @cmd: SCSI command that originated this ATA command
690 * @done: SCSI command completion function
692 * Obtain a reference to an unused ata_queued_cmd structure,
693 * which is the basic libata structure representing a single
694 * ATA command sent to the hardware.
696 * If a command was available, fill in the SCSI-specific
697 * portions of the structure with information on the
701 * spin_lock_irqsave(host lock)
704 * Command allocated, or %NULL if none available.
706 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
707 struct scsi_cmnd *cmd,
708 void (*done)(struct scsi_cmnd *))
710 struct ata_queued_cmd *qc;
712 qc = ata_qc_new_init(dev);
717 qc->sg = scsi_sglist(cmd);
718 qc->n_elem = scsi_sg_count(cmd);
720 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
727 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
729 struct scsi_cmnd *scmd = qc->scsicmd;
731 qc->extrabytes = scmd->request->extra_len;
732 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
736 * ata_dump_status - user friendly display of error info
737 * @id: id of the port in question
738 * @tf: ptr to filled out taskfile
740 * Decode and dump the ATA error/status registers for the user so
741 * that they have some idea what really happened at the non
742 * make-believe layer.
745 * inherited from caller
747 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
749 u8 stat = tf->command, err = tf->feature;
751 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
752 if (stat & ATA_BUSY) {
753 printk("Busy }\n"); /* Data is not valid in this case */
755 if (stat & 0x40) printk("DriveReady ");
756 if (stat & 0x20) printk("DeviceFault ");
757 if (stat & 0x10) printk("SeekComplete ");
758 if (stat & 0x08) printk("DataRequest ");
759 if (stat & 0x04) printk("CorrectedError ");
760 if (stat & 0x02) printk("Index ");
761 if (stat & 0x01) printk("Error ");
765 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
766 if (err & 0x04) printk("DriveStatusError ");
768 if (err & 0x04) printk("BadCRC ");
769 else printk("Sector ");
771 if (err & 0x40) printk("UncorrectableError ");
772 if (err & 0x10) printk("SectorIdNotFound ");
773 if (err & 0x02) printk("TrackZeroNotFound ");
774 if (err & 0x01) printk("AddrMarkNotFound ");
781 * ata_to_sense_error - convert ATA error to SCSI error
782 * @id: ATA device number
783 * @drv_stat: value contained in ATA status register
784 * @drv_err: value contained in ATA error register
785 * @sk: the sense key we'll fill out
786 * @asc: the additional sense code we'll fill out
787 * @ascq: the additional sense code qualifier we'll fill out
788 * @verbose: be verbose
790 * Converts an ATA error into a SCSI error. Fill out pointers to
791 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
792 * format sense blocks.
795 * spin_lock_irqsave(host lock)
797 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
798 u8 *asc, u8 *ascq, int verbose)
802 /* Based on the 3ware driver translation table */
803 static const unsigned char sense_table[][4] = {
805 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
807 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
809 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
810 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
811 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
812 /* MC|ID|ABRT|TRK0|MARK */
813 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
815 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
816 /* Bad address mark */
817 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
819 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
821 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
822 /* Media change request */
823 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
825 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
827 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
829 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
830 /* BBD - block marked bad */
831 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
832 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
834 static const unsigned char stat_table[][4] = {
835 /* Must be first because BUSY means no other bits valid */
836 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
837 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
838 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
839 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
840 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
844 * Is this an error we can process/parse
846 if (drv_stat & ATA_BUSY) {
847 drv_err = 0; /* Ignore the err bits, they're invalid */
851 /* Look for drv_err */
852 for (i = 0; sense_table[i][0] != 0xFF; i++) {
853 /* Look for best matches first */
854 if ((sense_table[i][0] & drv_err) ==
856 *sk = sense_table[i][1];
857 *asc = sense_table[i][2];
858 *ascq = sense_table[i][3];
862 /* No immediate match */
864 printk(KERN_WARNING "ata%u: no sense translation for "
865 "error 0x%02x\n", id, drv_err);
868 /* Fall back to interpreting status bits */
869 for (i = 0; stat_table[i][0] != 0xFF; i++) {
870 if (stat_table[i][0] & drv_stat) {
871 *sk = stat_table[i][1];
872 *asc = stat_table[i][2];
873 *ascq = stat_table[i][3];
877 /* No error? Undecoded? */
879 printk(KERN_WARNING "ata%u: no sense translation for "
880 "status: 0x%02x\n", id, drv_stat);
882 /* We need a sensible error return here, which is tricky, and one
883 that won't cause people to do things like return a disk wrongly */
884 *sk = ABORTED_COMMAND;
890 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
891 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
892 id, drv_stat, drv_err, *sk, *asc, *ascq);
897 * ata_gen_passthru_sense - Generate check condition sense block.
898 * @qc: Command that completed.
900 * This function is specific to the ATA descriptor format sense
901 * block specified for the ATA pass through commands. Regardless
902 * of whether the command errored or not, return a sense
903 * block. Copy all controller registers into the sense
904 * block. Clear sense key, ASC & ASCQ if there is no error.
909 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
911 struct scsi_cmnd *cmd = qc->scsicmd;
912 struct ata_taskfile *tf = &qc->result_tf;
913 unsigned char *sb = cmd->sense_buffer;
914 unsigned char *desc = sb + 8;
915 int verbose = qc->ap->ops->error_handler == NULL;
917 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
919 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
922 * Use ata_to_sense_error() to map status register bits
923 * onto sense key, asc & ascq.
926 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
927 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
928 &sb[1], &sb[2], &sb[3], verbose);
933 * Sense data is current and format is descriptor.
939 /* set length of additional sense data */
944 * Copy registers into sense buffer.
947 desc[3] = tf->feature; /* == error reg */
952 desc[12] = tf->device;
953 desc[13] = tf->command; /* == status reg */
956 * Fill in Extend bit, and the high order bytes
959 if (tf->flags & ATA_TFLAG_LBA48) {
961 desc[4] = tf->hob_nsect;
962 desc[6] = tf->hob_lbal;
963 desc[8] = tf->hob_lbam;
964 desc[10] = tf->hob_lbah;
969 * ata_gen_ata_sense - generate a SCSI fixed sense block
970 * @qc: Command that we are erroring out
972 * Generate sense block for a failed ATA command @qc. Descriptor
973 * format is used to accomodate LBA48 block address.
978 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
980 struct ata_device *dev = qc->dev;
981 struct scsi_cmnd *cmd = qc->scsicmd;
982 struct ata_taskfile *tf = &qc->result_tf;
983 unsigned char *sb = cmd->sense_buffer;
984 unsigned char *desc = sb + 8;
985 int verbose = qc->ap->ops->error_handler == NULL;
988 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
990 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
992 /* sense data is current and format is descriptor */
995 /* Use ata_to_sense_error() to map status register bits
996 * onto sense key, asc & ascq.
999 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1000 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1001 &sb[1], &sb[2], &sb[3], verbose);
1005 block = ata_tf_read_block(&qc->result_tf, dev);
1007 /* information sense data descriptor */
1012 desc[2] |= 0x80; /* valid */
1013 desc[6] = block >> 40;
1014 desc[7] = block >> 32;
1015 desc[8] = block >> 24;
1016 desc[9] = block >> 16;
1017 desc[10] = block >> 8;
1021 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1023 sdev->use_10_for_rw = 1;
1024 sdev->use_10_for_ms = 1;
1026 /* Schedule policy is determined by ->qc_defer() callback and
1027 * it needs to see every deferred qc. Set dev_blocked to 1 to
1028 * prevent SCSI midlayer from automatically deferring
1031 sdev->max_device_blocked = 1;
1035 * atapi_drain_needed - Check whether data transfer may overflow
1036 * @rq: request to be checked
1038 * ATAPI commands which transfer variable length data to host
1039 * might overflow due to application error or hardare bug. This
1040 * function checks whether overflow should be drained and ignored
1047 * 1 if ; otherwise, 0.
1049 static int atapi_drain_needed(struct request *rq)
1051 if (likely(!blk_pc_request(rq)))
1054 if (!rq->data_len || (rq->cmd_flags & REQ_RW))
1057 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1060 static int ata_scsi_dev_config(struct scsi_device *sdev,
1061 struct ata_device *dev)
1063 if (!ata_id_has_unload(dev->id))
1064 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1066 /* configure max sectors */
1067 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
1069 if (dev->class == ATA_DEV_ATAPI) {
1070 struct request_queue *q = sdev->request_queue;
1073 /* set the min alignment and padding */
1074 blk_queue_update_dma_alignment(sdev->request_queue,
1075 ATA_DMA_PAD_SZ - 1);
1076 blk_queue_update_dma_pad(sdev->request_queue,
1077 ATA_DMA_PAD_SZ - 1);
1079 /* configure draining */
1080 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1082 ata_dev_printk(dev, KERN_ERR,
1083 "drain buffer allocation failed\n");
1087 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1089 if (ata_id_is_ssd(dev->id))
1090 queue_flag_set_unlocked(QUEUE_FLAG_NONROT,
1091 sdev->request_queue);
1093 /* ATA devices must be sector aligned */
1094 blk_queue_update_dma_alignment(sdev->request_queue,
1096 sdev->manage_start_stop = 1;
1099 if (dev->flags & ATA_DFLAG_AN)
1100 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1102 if (dev->flags & ATA_DFLAG_NCQ) {
1105 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1106 depth = min(ATA_MAX_QUEUE - 1, depth);
1107 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
1114 * ata_scsi_slave_config - Set SCSI device attributes
1115 * @sdev: SCSI device to examine
1117 * This is called before we actually start reading
1118 * and writing to the device, to configure certain
1119 * SCSI mid-layer behaviors.
1122 * Defined by SCSI layer. We don't really care.
1125 int ata_scsi_slave_config(struct scsi_device *sdev)
1127 struct ata_port *ap = ata_shost_to_port(sdev->host);
1128 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1131 ata_scsi_sdev_config(sdev);
1134 rc = ata_scsi_dev_config(sdev, dev);
1140 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1141 * @sdev: SCSI device to be destroyed
1143 * @sdev is about to be destroyed for hot/warm unplugging. If
1144 * this unplugging was initiated by libata as indicated by NULL
1145 * dev->sdev, this function doesn't have to do anything.
1146 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1147 * Clear dev->sdev, schedule the device for ATA detach and invoke
1151 * Defined by SCSI layer. We don't really care.
1153 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1155 struct ata_port *ap = ata_shost_to_port(sdev->host);
1156 struct request_queue *q = sdev->request_queue;
1157 unsigned long flags;
1158 struct ata_device *dev;
1160 if (!ap->ops->error_handler)
1163 spin_lock_irqsave(ap->lock, flags);
1164 dev = __ata_scsi_find_dev(ap, sdev);
1165 if (dev && dev->sdev) {
1166 /* SCSI device already in CANCEL state, no need to offline it */
1168 dev->flags |= ATA_DFLAG_DETACH;
1169 ata_port_schedule_eh(ap);
1171 spin_unlock_irqrestore(ap->lock, flags);
1173 kfree(q->dma_drain_buffer);
1174 q->dma_drain_buffer = NULL;
1175 q->dma_drain_size = 0;
1179 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1180 * @sdev: SCSI device to configure queue depth for
1181 * @queue_depth: new queue depth
1183 * This is libata standard hostt->change_queue_depth callback.
1184 * SCSI will call into this callback when user tries to set queue
1188 * SCSI layer (we don't care)
1191 * Newly configured queue depth.
1193 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1195 struct ata_port *ap = ata_shost_to_port(sdev->host);
1196 struct ata_device *dev;
1197 unsigned long flags;
1199 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1200 return sdev->queue_depth;
1202 dev = ata_scsi_find_dev(ap, sdev);
1203 if (!dev || !ata_dev_enabled(dev))
1204 return sdev->queue_depth;
1207 spin_lock_irqsave(ap->lock, flags);
1208 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1209 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1210 dev->flags |= ATA_DFLAG_NCQ_OFF;
1213 spin_unlock_irqrestore(ap->lock, flags);
1215 /* limit and apply queue depth */
1216 queue_depth = min(queue_depth, sdev->host->can_queue);
1217 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1218 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1220 if (sdev->queue_depth == queue_depth)
1223 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
1227 /* XXX: for spindown warning */
1228 static void ata_delayed_done_timerfn(unsigned long arg)
1230 struct scsi_cmnd *scmd = (void *)arg;
1232 scmd->scsi_done(scmd);
1235 /* XXX: for spindown warning */
1236 static void ata_delayed_done(struct scsi_cmnd *scmd)
1238 static struct timer_list timer;
1240 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
1241 mod_timer(&timer, jiffies + 5 * HZ);
1245 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1246 * @qc: Storage for translated ATA taskfile
1248 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1249 * (to start). Perhaps these commands should be preceded by
1250 * CHECK POWER MODE to see what power mode the device is already in.
1251 * [See SAT revision 5 at www.t10.org]
1254 * spin_lock_irqsave(host lock)
1257 * Zero on success, non-zero on error.
1259 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1261 struct scsi_cmnd *scmd = qc->scsicmd;
1262 struct ata_taskfile *tf = &qc->tf;
1263 const u8 *cdb = scmd->cmnd;
1265 if (scmd->cmd_len < 5)
1268 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1269 tf->protocol = ATA_PROT_NODATA;
1271 ; /* ignore IMMED bit, violates sat-r05 */
1274 goto invalid_fld; /* LOEJ bit set not supported */
1275 if (((cdb[4] >> 4) & 0xf) != 0)
1276 goto invalid_fld; /* power conditions not supported */
1279 tf->nsect = 1; /* 1 sector, lba=0 */
1281 if (qc->dev->flags & ATA_DFLAG_LBA) {
1282 tf->flags |= ATA_TFLAG_LBA;
1287 tf->device |= ATA_LBA;
1290 tf->lbal = 0x1; /* sect */
1291 tf->lbam = 0x0; /* cyl low */
1292 tf->lbah = 0x0; /* cyl high */
1295 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1297 /* XXX: This is for backward compatibility, will be
1298 * removed. Read Documentation/feature-removal-schedule.txt
1301 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
1302 (system_state == SYSTEM_HALT ||
1303 system_state == SYSTEM_POWER_OFF)) {
1304 static unsigned long warned;
1306 if (!test_and_set_bit(0, &warned)) {
1307 ata_dev_printk(qc->dev, KERN_WARNING,
1308 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
1309 "UPDATE SHUTDOWN UTILITY\n");
1310 ata_dev_printk(qc->dev, KERN_WARNING,
1311 "For more info, visit "
1312 "http://linux-ata.org/shutdown.html\n");
1314 /* ->scsi_done is not used, use it for
1315 * delayed completion.
1317 scmd->scsi_done = qc->scsidone;
1318 qc->scsidone = ata_delayed_done;
1320 scmd->result = SAM_STAT_GOOD;
1324 /* Issue ATA STANDBY IMMEDIATE command */
1325 tf->command = ATA_CMD_STANDBYNOW1;
1329 * Standby and Idle condition timers could be implemented but that
1330 * would require libata to implement the Power condition mode page
1331 * and allow the user to change it. Changing mode pages requires
1332 * MODE SELECT to be implemented.
1338 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1339 /* "Invalid field in cbd" */
1345 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1346 * @qc: Storage for translated ATA taskfile
1348 * Sets up an ATA taskfile to issue FLUSH CACHE or
1352 * spin_lock_irqsave(host lock)
1355 * Zero on success, non-zero on error.
1357 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1359 struct ata_taskfile *tf = &qc->tf;
1361 tf->flags |= ATA_TFLAG_DEVICE;
1362 tf->protocol = ATA_PROT_NODATA;
1364 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1365 tf->command = ATA_CMD_FLUSH_EXT;
1367 tf->command = ATA_CMD_FLUSH;
1369 /* flush is critical for IO integrity, consider it an IO command */
1370 qc->flags |= ATA_QCFLAG_IO;
1376 * scsi_6_lba_len - Get LBA and transfer length
1377 * @cdb: SCSI command to translate
1379 * Calculate LBA and transfer length for 6-byte commands.
1383 * @plen: the transfer length
1385 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1390 VPRINTK("six-byte command\n");
1392 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1393 lba |= ((u64)cdb[2]) << 8;
1394 lba |= ((u64)cdb[3]);
1403 * scsi_10_lba_len - Get LBA and transfer length
1404 * @cdb: SCSI command to translate
1406 * Calculate LBA and transfer length for 10-byte commands.
1410 * @plen: the transfer length
1412 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1417 VPRINTK("ten-byte command\n");
1419 lba |= ((u64)cdb[2]) << 24;
1420 lba |= ((u64)cdb[3]) << 16;
1421 lba |= ((u64)cdb[4]) << 8;
1422 lba |= ((u64)cdb[5]);
1424 len |= ((u32)cdb[7]) << 8;
1425 len |= ((u32)cdb[8]);
1432 * scsi_16_lba_len - Get LBA and transfer length
1433 * @cdb: SCSI command to translate
1435 * Calculate LBA and transfer length for 16-byte commands.
1439 * @plen: the transfer length
1441 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1446 VPRINTK("sixteen-byte command\n");
1448 lba |= ((u64)cdb[2]) << 56;
1449 lba |= ((u64)cdb[3]) << 48;
1450 lba |= ((u64)cdb[4]) << 40;
1451 lba |= ((u64)cdb[5]) << 32;
1452 lba |= ((u64)cdb[6]) << 24;
1453 lba |= ((u64)cdb[7]) << 16;
1454 lba |= ((u64)cdb[8]) << 8;
1455 lba |= ((u64)cdb[9]);
1457 len |= ((u32)cdb[10]) << 24;
1458 len |= ((u32)cdb[11]) << 16;
1459 len |= ((u32)cdb[12]) << 8;
1460 len |= ((u32)cdb[13]);
1467 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1468 * @qc: Storage for translated ATA taskfile
1470 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1473 * spin_lock_irqsave(host lock)
1476 * Zero on success, non-zero on error.
1478 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1480 struct scsi_cmnd *scmd = qc->scsicmd;
1481 struct ata_taskfile *tf = &qc->tf;
1482 struct ata_device *dev = qc->dev;
1483 u64 dev_sectors = qc->dev->n_sectors;
1484 const u8 *cdb = scmd->cmnd;
1488 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1489 tf->protocol = ATA_PROT_NODATA;
1491 if (cdb[0] == VERIFY) {
1492 if (scmd->cmd_len < 10)
1494 scsi_10_lba_len(cdb, &block, &n_block);
1495 } else if (cdb[0] == VERIFY_16) {
1496 if (scmd->cmd_len < 16)
1498 scsi_16_lba_len(cdb, &block, &n_block);
1504 if (block >= dev_sectors)
1506 if ((block + n_block) > dev_sectors)
1509 if (dev->flags & ATA_DFLAG_LBA) {
1510 tf->flags |= ATA_TFLAG_LBA;
1512 if (lba_28_ok(block, n_block)) {
1514 tf->command = ATA_CMD_VERIFY;
1515 tf->device |= (block >> 24) & 0xf;
1516 } else if (lba_48_ok(block, n_block)) {
1517 if (!(dev->flags & ATA_DFLAG_LBA48))
1521 tf->flags |= ATA_TFLAG_LBA48;
1522 tf->command = ATA_CMD_VERIFY_EXT;
1524 tf->hob_nsect = (n_block >> 8) & 0xff;
1526 tf->hob_lbah = (block >> 40) & 0xff;
1527 tf->hob_lbam = (block >> 32) & 0xff;
1528 tf->hob_lbal = (block >> 24) & 0xff;
1530 /* request too large even for LBA48 */
1533 tf->nsect = n_block & 0xff;
1535 tf->lbah = (block >> 16) & 0xff;
1536 tf->lbam = (block >> 8) & 0xff;
1537 tf->lbal = block & 0xff;
1539 tf->device |= ATA_LBA;
1542 u32 sect, head, cyl, track;
1544 if (!lba_28_ok(block, n_block))
1547 /* Convert LBA to CHS */
1548 track = (u32)block / dev->sectors;
1549 cyl = track / dev->heads;
1550 head = track % dev->heads;
1551 sect = (u32)block % dev->sectors + 1;
1553 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1554 (u32)block, track, cyl, head, sect);
1556 /* Check whether the converted CHS can fit.
1560 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1563 tf->command = ATA_CMD_VERIFY;
1564 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1567 tf->lbah = cyl >> 8;
1574 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1575 /* "Invalid field in cbd" */
1579 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1580 /* "Logical Block Address out of range" */
1584 scmd->result = SAM_STAT_GOOD;
1589 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1590 * @qc: Storage for translated ATA taskfile
1592 * Converts any of six SCSI read/write commands into the
1593 * ATA counterpart, including starting sector (LBA),
1594 * sector count, and taking into account the device's LBA48
1597 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1598 * %WRITE_16 are currently supported.
1601 * spin_lock_irqsave(host lock)
1604 * Zero on success, non-zero on error.
1606 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1608 struct scsi_cmnd *scmd = qc->scsicmd;
1609 const u8 *cdb = scmd->cmnd;
1610 unsigned int tf_flags = 0;
1615 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1616 tf_flags |= ATA_TFLAG_WRITE;
1618 /* Calculate the SCSI LBA, transfer length and FUA. */
1622 if (unlikely(scmd->cmd_len < 10))
1624 scsi_10_lba_len(cdb, &block, &n_block);
1625 if (unlikely(cdb[1] & (1 << 3)))
1626 tf_flags |= ATA_TFLAG_FUA;
1630 if (unlikely(scmd->cmd_len < 6))
1632 scsi_6_lba_len(cdb, &block, &n_block);
1634 /* for 6-byte r/w commands, transfer length 0
1635 * means 256 blocks of data, not 0 block.
1642 if (unlikely(scmd->cmd_len < 16))
1644 scsi_16_lba_len(cdb, &block, &n_block);
1645 if (unlikely(cdb[1] & (1 << 3)))
1646 tf_flags |= ATA_TFLAG_FUA;
1649 DPRINTK("no-byte command\n");
1653 /* Check and compose ATA command */
1655 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1656 * length 0 means transfer 0 block of data.
1657 * However, for ATA R/W commands, sector count 0 means
1658 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1660 * WARNING: one or two older ATA drives treat 0 as 0...
1664 qc->flags |= ATA_QCFLAG_IO;
1665 qc->nbytes = n_block * ATA_SECT_SIZE;
1667 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1669 if (likely(rc == 0))
1674 /* treat all other errors as -EINVAL, fall through */
1676 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1677 /* "Invalid field in cbd" */
1681 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1682 /* "Logical Block Address out of range" */
1686 scmd->result = SAM_STAT_GOOD;
1690 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1692 struct ata_port *ap = qc->ap;
1693 struct scsi_cmnd *cmd = qc->scsicmd;
1694 u8 *cdb = cmd->cmnd;
1695 int need_sense = (qc->err_mask != 0);
1697 /* For ATA pass thru (SAT) commands, generate a sense block if
1698 * user mandated it or if there's an error. Note that if we
1699 * generate because the user forced us to, a check condition
1700 * is generated and the ATA register values are returned
1701 * whether the command completed successfully or not. If there
1702 * was no error, SK, ASC and ASCQ will all be zero.
1704 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1705 ((cdb[2] & 0x20) || need_sense)) {
1706 ata_gen_passthru_sense(qc);
1709 cmd->result = SAM_STAT_GOOD;
1711 /* TODO: decide which descriptor format to use
1712 * for 48b LBA devices and call that here
1713 * instead of the fixed desc, which is only
1714 * good for smaller LBA (and maybe CHS?)
1717 ata_gen_ata_sense(qc);
1721 /* XXX: track spindown state for spindown skipping and warning */
1722 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1723 qc->tf.command == ATA_CMD_STANDBYNOW1))
1724 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1725 else if (likely(system_state != SYSTEM_HALT &&
1726 system_state != SYSTEM_POWER_OFF))
1727 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1729 if (need_sense && !ap->ops->error_handler)
1730 ata_dump_status(ap->print_id, &qc->result_tf);
1738 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1739 * @dev: ATA device to which the command is addressed
1740 * @cmd: SCSI command to execute
1741 * @done: SCSI command completion function
1742 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1744 * Our ->queuecommand() function has decided that the SCSI
1745 * command issued can be directly translated into an ATA
1746 * command, rather than handled internally.
1748 * This function sets up an ata_queued_cmd structure for the
1749 * SCSI command, and sends that ata_queued_cmd to the hardware.
1751 * The xlat_func argument (actor) returns 0 if ready to execute
1752 * ATA command, else 1 to finish translation. If 1 is returned
1753 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1754 * to be set reflecting an error condition or clean (early)
1758 * spin_lock_irqsave(host lock)
1761 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1762 * needs to be deferred.
1764 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1765 void (*done)(struct scsi_cmnd *),
1766 ata_xlat_func_t xlat_func)
1768 struct ata_port *ap = dev->link->ap;
1769 struct ata_queued_cmd *qc;
1774 qc = ata_scsi_qc_new(dev, cmd, done);
1778 /* data is present; dma-map it */
1779 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1780 cmd->sc_data_direction == DMA_TO_DEVICE) {
1781 if (unlikely(scsi_bufflen(cmd) < 1)) {
1782 ata_dev_printk(dev, KERN_WARNING,
1783 "WARNING: zero len r/w req\n");
1787 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1789 qc->dma_dir = cmd->sc_data_direction;
1792 qc->complete_fn = ata_scsi_qc_complete;
1797 if (ap->ops->qc_defer) {
1798 if ((rc = ap->ops->qc_defer(qc)))
1802 /* select device, send command to hardware */
1811 DPRINTK("EXIT - early finish (good or error)\n");
1816 cmd->result = (DID_ERROR << 16);
1819 DPRINTK("EXIT - internal\n");
1824 DPRINTK("EXIT - defer\n");
1825 if (rc == ATA_DEFER_LINK)
1826 return SCSI_MLQUEUE_DEVICE_BUSY;
1828 return SCSI_MLQUEUE_HOST_BUSY;
1832 * ata_scsi_rbuf_get - Map response buffer.
1833 * @cmd: SCSI command containing buffer to be mapped.
1834 * @flags: unsigned long variable to store irq enable status
1835 * @copy_in: copy in from user buffer
1837 * Prepare buffer for simulated SCSI commands.
1840 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1843 * Pointer to response buffer.
1845 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1846 unsigned long *flags)
1848 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1850 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1852 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1853 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1854 return ata_scsi_rbuf;
1858 * ata_scsi_rbuf_put - Unmap response buffer.
1859 * @cmd: SCSI command containing buffer to be unmapped.
1860 * @copy_out: copy out result
1861 * @flags: @flags passed to ata_scsi_rbuf_get()
1863 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1864 * @copy_back is true.
1867 * Unlocks ata_scsi_rbuf_lock.
1869 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1870 unsigned long *flags)
1873 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1874 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1875 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1879 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1880 * @args: device IDENTIFY data / SCSI command of interest.
1881 * @actor: Callback hook for desired SCSI command simulator
1883 * Takes care of the hard work of simulating a SCSI command...
1884 * Mapping the response buffer, calling the command's handler,
1885 * and handling the handler's return value. This return value
1886 * indicates whether the handler wishes the SCSI command to be
1887 * completed successfully (0), or not (in which case cmd->result
1888 * and sense buffer are assumed to be set).
1891 * spin_lock_irqsave(host lock)
1893 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1894 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1898 struct scsi_cmnd *cmd = args->cmd;
1899 unsigned long flags;
1901 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1902 rc = actor(args, rbuf);
1903 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
1906 cmd->result = SAM_STAT_GOOD;
1911 * ata_scsiop_inq_std - Simulate INQUIRY command
1912 * @args: device IDENTIFY data / SCSI command of interest.
1913 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1915 * Returns standard device identification data associated
1916 * with non-VPD INQUIRY command output.
1919 * spin_lock_irqsave(host lock)
1921 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1923 const u8 versions[] = {
1924 0x60, /* SAM-3 (no version claimed) */
1927 0x20, /* SBC-2 (no version claimed) */
1930 0x60 /* SPC-3 (no version claimed) */
1935 0x5, /* claim SPC-3 version compatibility */
1942 /* set scsi removeable (RMB) bit per ata bit */
1943 if (ata_id_removeable(args->id))
1946 memcpy(rbuf, hdr, sizeof(hdr));
1947 memcpy(&rbuf[8], "ATA ", 8);
1948 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1949 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1951 if (rbuf[32] == 0 || rbuf[32] == ' ')
1952 memcpy(&rbuf[32], "n/a ", 4);
1954 memcpy(rbuf + 59, versions, sizeof(versions));
1960 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1961 * @args: device IDENTIFY data / SCSI command of interest.
1962 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1964 * Returns list of inquiry VPD pages available.
1967 * spin_lock_irqsave(host lock)
1969 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1971 const u8 pages[] = {
1972 0x00, /* page 0x00, this page */
1973 0x80, /* page 0x80, unit serial no page */
1974 0x83, /* page 0x83, device ident page */
1975 0x89, /* page 0x89, ata info page */
1976 0xb1, /* page 0xb1, block device characteristics page */
1979 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1980 memcpy(rbuf + 4, pages, sizeof(pages));
1985 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1986 * @args: device IDENTIFY data / SCSI command of interest.
1987 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1989 * Returns ATA device serial number.
1992 * spin_lock_irqsave(host lock)
1994 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
1998 0x80, /* this page code */
2000 ATA_ID_SERNO_LEN, /* page len */
2003 memcpy(rbuf, hdr, sizeof(hdr));
2004 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2005 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2010 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2011 * @args: device IDENTIFY data / SCSI command of interest.
2012 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2014 * Yields two logical unit device identification designators:
2015 * - vendor specific ASCII containing the ATA serial number
2016 * - SAT defined "t10 vendor id based" containing ASCII vendor
2017 * name ("ATA "), model and serial numbers.
2020 * spin_lock_irqsave(host lock)
2022 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2024 const int sat_model_serial_desc_len = 68;
2027 rbuf[1] = 0x83; /* this page code */
2030 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2032 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2034 ata_id_string(args->id, (unsigned char *) rbuf + num,
2035 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2036 num += ATA_ID_SERNO_LEN;
2038 /* SAT defined lu model and serial numbers descriptor */
2039 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2042 rbuf[num + 3] = sat_model_serial_desc_len;
2044 memcpy(rbuf + num, "ATA ", 8);
2046 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2048 num += ATA_ID_PROD_LEN;
2049 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2051 num += ATA_ID_SERNO_LEN;
2053 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2058 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2059 * @args: device IDENTIFY data / SCSI command of interest.
2060 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2062 * Yields SAT-specified ATA VPD page.
2065 * spin_lock_irqsave(host lock)
2067 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2069 struct ata_taskfile tf;
2071 memset(&tf, 0, sizeof(tf));
2073 rbuf[1] = 0x89; /* our page code */
2074 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2075 rbuf[3] = (0x238 & 0xff);
2077 memcpy(&rbuf[8], "linux ", 8);
2078 memcpy(&rbuf[16], "libata ", 16);
2079 memcpy(&rbuf[32], DRV_VERSION, 4);
2080 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2082 /* we don't store the ATA device signature, so we fake it */
2084 tf.command = ATA_DRDY; /* really, this is Status reg */
2088 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2089 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2091 rbuf[56] = ATA_CMD_ID_ATA;
2093 memcpy(&rbuf[60], &args->id[0], 512);
2097 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2101 if (ata_id_major_version(args->id) > 7) {
2102 rbuf[4] = args->id[217] >> 8;
2103 rbuf[5] = args->id[217];
2104 rbuf[7] = args->id[168] & 0xf;
2111 * ata_scsiop_noop - Command handler that simply returns success.
2112 * @args: device IDENTIFY data / SCSI command of interest.
2113 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2115 * No operation. Simply returns success to caller, to indicate
2116 * that the caller should successfully complete this SCSI command.
2119 * spin_lock_irqsave(host lock)
2121 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
2128 * ata_msense_caching - Simulate MODE SENSE caching info page
2129 * @id: device IDENTIFY data
2130 * @buf: output buffer
2132 * Generate a caching info page, which conditionally indicates
2133 * write caching to the SCSI layer, depending on device
2139 static unsigned int ata_msense_caching(u16 *id, u8 *buf)
2141 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
2142 if (ata_id_wcache_enabled(id))
2143 buf[2] |= (1 << 2); /* write cache enable */
2144 if (!ata_id_rahead_enabled(id))
2145 buf[12] |= (1 << 5); /* disable read ahead */
2146 return sizeof(def_cache_mpage);
2150 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2151 * @buf: output buffer
2153 * Generate a generic MODE SENSE control mode page.
2158 static unsigned int ata_msense_ctl_mode(u8 *buf)
2160 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
2161 return sizeof(def_control_mpage);
2165 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2166 * @buf: output buffer
2168 * Generate a generic MODE SENSE r/w error recovery page.
2173 static unsigned int ata_msense_rw_recovery(u8 *buf)
2175 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
2176 return sizeof(def_rw_recovery_mpage);
2180 * We can turn this into a real blacklist if it's needed, for now just
2181 * blacklist any Maxtor BANC1G10 revision firmware
2183 static int ata_dev_supports_fua(u16 *id)
2185 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2189 if (!ata_id_has_fua(id))
2192 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2193 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2195 if (strcmp(model, "Maxtor"))
2197 if (strcmp(fw, "BANC1G10"))
2200 return 0; /* blacklisted */
2204 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2205 * @args: device IDENTIFY data / SCSI command of interest.
2206 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2208 * Simulate MODE SENSE commands. Assume this is invoked for direct
2209 * access devices (e.g. disks) only. There should be no block
2210 * descriptor for other device types.
2213 * spin_lock_irqsave(host lock)
2215 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2217 struct ata_device *dev = args->dev;
2218 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2219 const u8 sat_blk_desc[] = {
2220 0, 0, 0, 0, /* number of blocks: sat unspecified */
2222 0, 0x2, 0x0 /* block length: 512 bytes */
2225 unsigned int ebd, page_control, six_byte;
2230 six_byte = (scsicmd[0] == MODE_SENSE);
2231 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2233 * LLBA bit in msense(10) ignored (compliant)
2236 page_control = scsicmd[2] >> 6;
2237 switch (page_control) {
2238 case 0: /* current */
2239 break; /* supported */
2241 goto saving_not_supp;
2242 case 1: /* changeable */
2243 case 2: /* defaults */
2249 p += 4 + (ebd ? 8 : 0);
2251 p += 8 + (ebd ? 8 : 0);
2253 pg = scsicmd[2] & 0x3f;
2256 * No mode subpages supported (yet) but asking for _all_
2257 * subpages may be valid
2259 if (spg && (spg != ALL_SUB_MPAGES))
2263 case RW_RECOVERY_MPAGE:
2264 p += ata_msense_rw_recovery(p);
2268 p += ata_msense_caching(args->id, p);
2272 p += ata_msense_ctl_mode(p);
2276 p += ata_msense_rw_recovery(p);
2277 p += ata_msense_caching(args->id, p);
2278 p += ata_msense_ctl_mode(p);
2281 default: /* invalid page code */
2286 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2287 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2291 rbuf[0] = p - rbuf - 1;
2294 rbuf[3] = sizeof(sat_blk_desc);
2295 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2298 unsigned int output_len = p - rbuf - 2;
2300 rbuf[0] = output_len >> 8;
2301 rbuf[1] = output_len;
2304 rbuf[7] = sizeof(sat_blk_desc);
2305 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2311 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2312 /* "Invalid field in cbd" */
2316 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2317 /* "Saving parameters not supported" */
2322 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2323 * @args: device IDENTIFY data / SCSI command of interest.
2324 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2326 * Simulate READ CAPACITY commands.
2331 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2333 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
2337 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2338 if (last_lba >= 0xffffffffULL)
2339 last_lba = 0xffffffff;
2341 /* sector count, 32-bit */
2342 rbuf[0] = last_lba >> (8 * 3);
2343 rbuf[1] = last_lba >> (8 * 2);
2344 rbuf[2] = last_lba >> (8 * 1);
2348 rbuf[6] = ATA_SECT_SIZE >> 8;
2349 rbuf[7] = ATA_SECT_SIZE & 0xff;
2351 /* sector count, 64-bit */
2352 rbuf[0] = last_lba >> (8 * 7);
2353 rbuf[1] = last_lba >> (8 * 6);
2354 rbuf[2] = last_lba >> (8 * 5);
2355 rbuf[3] = last_lba >> (8 * 4);
2356 rbuf[4] = last_lba >> (8 * 3);
2357 rbuf[5] = last_lba >> (8 * 2);
2358 rbuf[6] = last_lba >> (8 * 1);
2362 rbuf[10] = ATA_SECT_SIZE >> 8;
2363 rbuf[11] = ATA_SECT_SIZE & 0xff;
2370 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2371 * @args: device IDENTIFY data / SCSI command of interest.
2372 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2374 * Simulate REPORT LUNS command.
2377 * spin_lock_irqsave(host lock)
2379 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2382 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2387 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2389 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2390 /* FIXME: not quite right; we don't want the
2391 * translation of taskfile registers into
2392 * a sense descriptors, since that's only
2393 * correct for ATA, not ATAPI
2395 ata_gen_passthru_sense(qc);
2398 qc->scsidone(qc->scsicmd);
2402 /* is it pointless to prefer PIO for "safety reasons"? */
2403 static inline int ata_pio_use_silly(struct ata_port *ap)
2405 return (ap->flags & ATA_FLAG_PIO_DMA);
2408 static void atapi_request_sense(struct ata_queued_cmd *qc)
2410 struct ata_port *ap = qc->ap;
2411 struct scsi_cmnd *cmd = qc->scsicmd;
2413 DPRINTK("ATAPI request sense\n");
2415 /* FIXME: is this needed? */
2416 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2418 #ifdef CONFIG_ATA_SFF
2419 if (ap->ops->sff_tf_read)
2420 ap->ops->sff_tf_read(ap, &qc->tf);
2423 /* fill these in, for the case where they are -not- overwritten */
2424 cmd->sense_buffer[0] = 0x70;
2425 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2429 /* setup sg table and init transfer direction */
2430 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2431 ata_sg_init(qc, &qc->sgent, 1);
2432 qc->dma_dir = DMA_FROM_DEVICE;
2434 memset(&qc->cdb, 0, qc->dev->cdb_len);
2435 qc->cdb[0] = REQUEST_SENSE;
2436 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2438 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2439 qc->tf.command = ATA_CMD_PACKET;
2441 if (ata_pio_use_silly(ap)) {
2442 qc->tf.protocol = ATAPI_PROT_DMA;
2443 qc->tf.feature |= ATAPI_PKT_DMA;
2445 qc->tf.protocol = ATAPI_PROT_PIO;
2446 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2449 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2451 qc->complete_fn = atapi_sense_complete;
2458 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2460 struct scsi_cmnd *cmd = qc->scsicmd;
2461 unsigned int err_mask = qc->err_mask;
2463 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2465 /* handle completion from new EH */
2466 if (unlikely(qc->ap->ops->error_handler &&
2467 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2469 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2470 /* FIXME: not quite right; we don't want the
2471 * translation of taskfile registers into a
2472 * sense descriptors, since that's only
2473 * correct for ATA, not ATAPI
2475 ata_gen_passthru_sense(qc);
2478 /* SCSI EH automatically locks door if sdev->locked is
2479 * set. Sometimes door lock request continues to
2480 * fail, for example, when no media is present. This
2481 * creates a loop - SCSI EH issues door lock which
2482 * fails and gets invoked again to acquire sense data
2483 * for the failed command.
2485 * If door lock fails, always clear sdev->locked to
2486 * avoid this infinite loop.
2488 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2489 qc->dev->sdev->locked = 0;
2491 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2497 /* successful completion or old EH failure path */
2498 if (unlikely(err_mask & AC_ERR_DEV)) {
2499 cmd->result = SAM_STAT_CHECK_CONDITION;
2500 atapi_request_sense(qc);
2502 } else if (unlikely(err_mask)) {
2503 /* FIXME: not quite right; we don't want the
2504 * translation of taskfile registers into
2505 * a sense descriptors, since that's only
2506 * correct for ATA, not ATAPI
2508 ata_gen_passthru_sense(qc);
2510 u8 *scsicmd = cmd->cmnd;
2512 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2513 unsigned long flags;
2516 buf = ata_scsi_rbuf_get(cmd, true, &flags);
2518 /* ATAPI devices typically report zero for their SCSI version,
2519 * and sometimes deviate from the spec WRT response data
2520 * format. If SCSI version is reported as zero like normal,
2521 * then we make the following fixups: 1) Fake MMC-5 version,
2522 * to indicate to the Linux scsi midlayer this is a modern
2523 * device. 2) Ensure response data format / ATAPI information
2524 * are always correct.
2531 ata_scsi_rbuf_put(cmd, true, &flags);
2534 cmd->result = SAM_STAT_GOOD;
2541 * atapi_xlat - Initialize PACKET taskfile
2542 * @qc: command structure to be initialized
2545 * spin_lock_irqsave(host lock)
2548 * Zero on success, non-zero on failure.
2550 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2552 struct scsi_cmnd *scmd = qc->scsicmd;
2553 struct ata_device *dev = qc->dev;
2554 int nodata = (scmd->sc_data_direction == DMA_NONE);
2555 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2556 unsigned int nbytes;
2558 memset(qc->cdb, 0, dev->cdb_len);
2559 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2561 qc->complete_fn = atapi_qc_complete;
2563 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2564 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2565 qc->tf.flags |= ATA_TFLAG_WRITE;
2566 DPRINTK("direction: write\n");
2569 qc->tf.command = ATA_CMD_PACKET;
2570 ata_qc_set_pc_nbytes(qc);
2572 /* check whether ATAPI DMA is safe */
2573 if (!nodata && !using_pio && atapi_check_dma(qc))
2576 /* Some controller variants snoop this value for Packet
2577 * transfers to do state machine and FIFO management. Thus we
2578 * want to set it properly, and for DMA where it is
2579 * effectively meaningless.
2581 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2583 /* Most ATAPI devices which honor transfer chunk size don't
2584 * behave according to the spec when odd chunk size which
2585 * matches the transfer length is specified. If the number of
2586 * bytes to transfer is 2n+1. According to the spec, what
2587 * should happen is to indicate that 2n+1 is going to be
2588 * transferred and transfer 2n+2 bytes where the last byte is
2591 * In practice, this doesn't happen. ATAPI devices first
2592 * indicate and transfer 2n bytes and then indicate and
2593 * transfer 2 bytes where the last byte is padding.
2595 * This inconsistency confuses several controllers which
2596 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2597 * These controllers use actual number of transferred bytes to
2598 * update DMA poitner and transfer of 4n+2 bytes make those
2599 * controller push DMA pointer by 4n+4 bytes because SATA data
2600 * FISes are aligned to 4 bytes. This causes data corruption
2601 * and buffer overrun.
2603 * Always setting nbytes to even number solves this problem
2604 * because then ATAPI devices don't have to split data at 2n
2610 qc->tf.lbam = (nbytes & 0xFF);
2611 qc->tf.lbah = (nbytes >> 8);
2614 qc->tf.protocol = ATAPI_PROT_NODATA;
2616 qc->tf.protocol = ATAPI_PROT_PIO;
2619 qc->tf.protocol = ATAPI_PROT_DMA;
2620 qc->tf.feature |= ATAPI_PKT_DMA;
2622 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2623 (scmd->sc_data_direction != DMA_TO_DEVICE))
2624 /* some SATA bridges need us to indicate data xfer direction */
2625 qc->tf.feature |= ATAPI_DMADIR;
2629 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2630 as ATAPI tape drives don't get this right otherwise */
2634 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2636 if (!sata_pmp_attached(ap)) {
2637 if (likely(devno < ata_link_max_devices(&ap->link)))
2638 return &ap->link.device[devno];
2640 if (likely(devno < ap->nr_pmp_links))
2641 return &ap->pmp_link[devno].device[0];
2647 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2648 const struct scsi_device *scsidev)
2652 /* skip commands not addressed to targets we simulate */
2653 if (!sata_pmp_attached(ap)) {
2654 if (unlikely(scsidev->channel || scsidev->lun))
2656 devno = scsidev->id;
2658 if (unlikely(scsidev->id || scsidev->lun))
2660 devno = scsidev->channel;
2663 return ata_find_dev(ap, devno);
2667 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2668 * @ap: ATA port to which the device is attached
2669 * @scsidev: SCSI device from which we derive the ATA device
2671 * Given various information provided in struct scsi_cmnd,
2672 * map that onto an ATA bus, and using that mapping
2673 * determine which ata_device is associated with the
2674 * SCSI command to be sent.
2677 * spin_lock_irqsave(host lock)
2680 * Associated ATA device, or %NULL if not found.
2682 static struct ata_device *
2683 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2685 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2687 if (unlikely(!dev || !ata_dev_enabled(dev)))
2694 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2695 * @byte1: Byte 1 from pass-thru CDB.
2698 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2701 ata_scsi_map_proto(u8 byte1)
2703 switch((byte1 & 0x1e) >> 1) {
2704 case 3: /* Non-data */
2705 return ATA_PROT_NODATA;
2708 case 10: /* UDMA Data-in */
2709 case 11: /* UDMA Data-Out */
2710 return ATA_PROT_DMA;
2712 case 4: /* PIO Data-in */
2713 case 5: /* PIO Data-out */
2714 return ATA_PROT_PIO;
2716 case 0: /* Hard Reset */
2718 case 8: /* Device Diagnostic */
2719 case 9: /* Device Reset */
2720 case 7: /* DMA Queued */
2721 case 12: /* FPDMA */
2722 case 15: /* Return Response Info */
2723 default: /* Reserved */
2727 return ATA_PROT_UNKNOWN;
2731 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2732 * @qc: command structure to be initialized
2734 * Handles either 12 or 16-byte versions of the CDB.
2737 * Zero on success, non-zero on failure.
2739 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2741 struct ata_taskfile *tf = &(qc->tf);
2742 struct scsi_cmnd *scmd = qc->scsicmd;
2743 struct ata_device *dev = qc->dev;
2744 const u8 *cdb = scmd->cmnd;
2746 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2750 * Filter TPM commands by default. These provide an
2751 * essentially uncontrolled encrypted "back door" between
2752 * applications and the disk. Set libata.allow_tpm=1 if you
2753 * have a real reason for wanting to use them. This ensures
2754 * that installed software cannot easily mess stuff up without
2755 * user intent. DVR type users will probably ship with this enabled
2756 * for movie content management.
2758 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2759 * for this and should do in future but that it is not sufficient as
2760 * DCS is an optional feature set. Thus we also do the software filter
2761 * so that we comply with the TC consortium stated goal that the user
2762 * can turn off TC features of their system.
2764 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
2767 /* We may not issue DMA commands if no DMA mode is set */
2768 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2772 * 12 and 16 byte CDBs use different offsets to
2773 * provide the various register values.
2775 if (cdb[0] == ATA_16) {
2777 * 16-byte CDB - may contain extended commands.
2779 * If that is the case, copy the upper byte register values.
2781 if (cdb[1] & 0x01) {
2782 tf->hob_feature = cdb[3];
2783 tf->hob_nsect = cdb[5];
2784 tf->hob_lbal = cdb[7];
2785 tf->hob_lbam = cdb[9];
2786 tf->hob_lbah = cdb[11];
2787 tf->flags |= ATA_TFLAG_LBA48;
2789 tf->flags &= ~ATA_TFLAG_LBA48;
2792 * Always copy low byte, device and command registers.
2794 tf->feature = cdb[4];
2799 tf->device = cdb[13];
2800 tf->command = cdb[14];
2803 * 12-byte CDB - incapable of extended commands.
2805 tf->flags &= ~ATA_TFLAG_LBA48;
2807 tf->feature = cdb[3];
2812 tf->device = cdb[8];
2813 tf->command = cdb[9];
2816 /* enforce correct master/slave bit */
2817 tf->device = dev->devno ?
2818 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2820 /* sanity check for pio multi commands */
2821 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2824 if (is_multi_taskfile(tf)) {
2825 unsigned int multi_count = 1 << (cdb[1] >> 5);
2827 /* compare the passed through multi_count
2828 * with the cached multi_count of libata
2830 if (multi_count != dev->multi_count)
2831 ata_dev_printk(dev, KERN_WARNING,
2832 "invalid multi_count %u ignored\n",
2836 /* READ/WRITE LONG use a non-standard sect_size */
2837 qc->sect_size = ATA_SECT_SIZE;
2838 switch (tf->command) {
2839 case ATA_CMD_READ_LONG:
2840 case ATA_CMD_READ_LONG_ONCE:
2841 case ATA_CMD_WRITE_LONG:
2842 case ATA_CMD_WRITE_LONG_ONCE:
2843 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2845 qc->sect_size = scsi_bufflen(scmd);
2849 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2850 * SET_FEATURES - XFER MODE must be preceded/succeeded
2851 * by an update to hardware-specific registers for each
2852 * controller (i.e. the reason for ->set_piomode(),
2853 * ->set_dmamode(), and ->post_set_mode() hooks).
2855 if ((tf->command == ATA_CMD_SET_FEATURES)
2856 && (tf->feature == SETFEATURES_XFER))
2860 * Set flags so that all registers will be written,
2861 * and pass on write indication (used for PIO/DMA
2864 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2866 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2867 tf->flags |= ATA_TFLAG_WRITE;
2870 * Set transfer length.
2872 * TODO: find out if we need to do more here to
2873 * cover scatter/gather case.
2875 ata_qc_set_pc_nbytes(qc);
2877 /* request result TF and be quiet about device error */
2878 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2883 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
2884 /* "Invalid field in cdb" */
2889 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2891 * @cmd: SCSI command opcode to consider
2893 * Look up the SCSI command given, and determine whether the
2894 * SCSI command is to be translated or simulated.
2897 * Pointer to translation function if possible, %NULL if not.
2900 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2910 return ata_scsi_rw_xlat;
2912 case SYNCHRONIZE_CACHE:
2913 if (ata_try_flush_cache(dev))
2914 return ata_scsi_flush_xlat;
2919 return ata_scsi_verify_xlat;
2923 return ata_scsi_pass_thru;
2926 return ata_scsi_start_stop_xlat;
2933 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2934 * @ap: ATA port to which the command was being sent
2935 * @cmd: SCSI command to dump
2937 * Prints the contents of a SCSI command via printk().
2940 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2941 struct scsi_cmnd *cmd)
2944 struct scsi_device *scsidev = cmd->device;
2945 u8 *scsicmd = cmd->cmnd;
2947 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2949 scsidev->channel, scsidev->id, scsidev->lun,
2950 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2951 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2956 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2957 void (*done)(struct scsi_cmnd *),
2958 struct ata_device *dev)
2960 u8 scsi_op = scmd->cmnd[0];
2961 ata_xlat_func_t xlat_func;
2964 if (dev->class == ATA_DEV_ATA) {
2965 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2968 xlat_func = ata_get_xlat_func(dev, scsi_op);
2970 if (unlikely(!scmd->cmd_len))
2974 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2975 /* relay SCSI command to ATAPI device */
2976 int len = COMMAND_SIZE(scsi_op);
2977 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
2980 xlat_func = atapi_xlat;
2982 /* ATA_16 passthru, treat as an ATA command */
2983 if (unlikely(scmd->cmd_len > 16))
2986 xlat_func = ata_get_xlat_func(dev, scsi_op);
2991 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
2993 ata_scsi_simulate(dev, scmd, done);
2998 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
2999 scmd->cmd_len, scsi_op, dev->cdb_len);
3000 scmd->result = DID_ERROR << 16;
3006 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3007 * @cmd: SCSI command to be sent
3008 * @done: Completion function, called when command is complete
3010 * In some cases, this function translates SCSI commands into
3011 * ATA taskfiles, and queues the taskfiles to be sent to
3012 * hardware. In other cases, this function simulates a
3013 * SCSI device by evaluating and responding to certain
3014 * SCSI commands. This creates the overall effect of
3015 * ATA and ATAPI devices appearing as SCSI devices.
3018 * Releases scsi-layer-held lock, and obtains host lock.
3021 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3024 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
3026 struct ata_port *ap;
3027 struct ata_device *dev;
3028 struct scsi_device *scsidev = cmd->device;
3029 struct Scsi_Host *shost = scsidev->host;
3032 ap = ata_shost_to_port(shost);
3034 spin_unlock(shost->host_lock);
3035 spin_lock(ap->lock);
3037 ata_scsi_dump_cdb(ap, cmd);
3039 dev = ata_scsi_find_dev(ap, scsidev);
3041 rc = __ata_scsi_queuecmd(cmd, done, dev);
3043 cmd->result = (DID_BAD_TARGET << 16);
3047 spin_unlock(ap->lock);
3048 spin_lock(shost->host_lock);
3053 * ata_scsi_simulate - simulate SCSI command on ATA device
3054 * @dev: the target device
3055 * @cmd: SCSI command being sent to device.
3056 * @done: SCSI command completion function.
3058 * Interprets and directly executes a select list of SCSI commands
3059 * that can be handled internally.
3062 * spin_lock_irqsave(host lock)
3065 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
3066 void (*done)(struct scsi_cmnd *))
3068 struct ata_scsi_args args;
3069 const u8 *scsicmd = cmd->cmnd;
3077 switch(scsicmd[0]) {
3078 /* TODO: worth improving? */
3080 ata_scsi_invalid_field(cmd, done);
3084 if (scsicmd[1] & 2) /* is CmdDt set? */
3085 ata_scsi_invalid_field(cmd, done);
3086 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3087 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3088 else switch (scsicmd[2]) {
3090 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
3093 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
3096 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
3099 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3102 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3105 ata_scsi_invalid_field(cmd, done);
3112 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3115 case MODE_SELECT: /* unconditionally return */
3116 case MODE_SELECT_10: /* bad-field-in-cdb */
3117 ata_scsi_invalid_field(cmd, done);
3121 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3124 case SERVICE_ACTION_IN:
3125 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3126 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3128 ata_scsi_invalid_field(cmd, done);
3132 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3136 ata_scsi_set_sense(cmd, 0, 0, 0);
3137 cmd->result = (DRIVER_SENSE << 24);
3141 /* if we reach this, then writeback caching is disabled,
3142 * turning this into a no-op.
3144 case SYNCHRONIZE_CACHE:
3147 /* no-op's, complete with success */
3151 case TEST_UNIT_READY:
3152 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3155 case SEND_DIAGNOSTIC:
3156 tmp8 = scsicmd[1] & ~(1 << 3);
3157 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3158 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3160 ata_scsi_invalid_field(cmd, done);
3163 /* all other commands */
3165 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3166 /* "Invalid command operation code" */
3172 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3176 for (i = 0; i < host->n_ports; i++) {
3177 struct ata_port *ap = host->ports[i];
3178 struct Scsi_Host *shost;
3181 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3185 *(struct ata_port **)&shost->hostdata[0] = ap;
3186 ap->scsi_host = shost;
3188 shost->transportt = &ata_scsi_transport_template;
3189 shost->unique_id = ap->print_id;
3192 shost->max_channel = 1;
3193 shost->max_cmd_len = 16;
3195 /* Schedule policy is determined by ->qc_defer()
3196 * callback and it needs to see every deferred qc.
3197 * Set host_blocked to 1 to prevent SCSI midlayer from
3198 * automatically deferring requests.
3200 shost->max_host_blocked = 1;
3202 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3210 scsi_host_put(host->ports[i]->scsi_host);
3213 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3215 scsi_remove_host(shost);
3216 scsi_host_put(shost);
3221 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3224 struct ata_device *last_failed_dev = NULL;
3225 struct ata_link *link;
3226 struct ata_device *dev;
3228 if (ap->flags & ATA_FLAG_DISABLED)
3232 ata_for_each_link(link, ap, EDGE) {
3233 ata_for_each_dev(dev, link, ENABLED) {
3234 struct scsi_device *sdev;
3235 int channel = 0, id = 0;
3240 if (ata_is_host_link(link))
3243 channel = link->pmp;
3245 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3247 if (!IS_ERR(sdev)) {
3249 scsi_device_put(sdev);
3254 /* If we scanned while EH was in progress or allocation
3255 * failure occurred, scan would have failed silently. Check
3256 * whether all devices are attached.
3258 ata_for_each_link(link, ap, EDGE) {
3259 ata_for_each_dev(dev, link, ENABLED) {
3268 /* we're missing some SCSI devices */
3270 /* If caller requested synchrnous scan && we've made
3271 * any progress, sleep briefly and repeat.
3273 if (dev != last_failed_dev) {
3275 last_failed_dev = dev;
3279 /* We might be failing to detect boot device, give it
3280 * a few more chances.
3287 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3288 "failed without making any progress,\n"
3289 " switching to async\n");
3292 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3293 round_jiffies_relative(HZ));
3297 * ata_scsi_offline_dev - offline attached SCSI device
3298 * @dev: ATA device to offline attached SCSI device for
3300 * This function is called from ata_eh_hotplug() and responsible
3301 * for taking the SCSI device attached to @dev offline. This
3302 * function is called with host lock which protects dev->sdev
3306 * spin_lock_irqsave(host lock)
3309 * 1 if attached SCSI device exists, 0 otherwise.
3311 int ata_scsi_offline_dev(struct ata_device *dev)
3314 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3321 * ata_scsi_remove_dev - remove attached SCSI device
3322 * @dev: ATA device to remove attached SCSI device for
3324 * This function is called from ata_eh_scsi_hotplug() and
3325 * responsible for removing the SCSI device attached to @dev.
3328 * Kernel thread context (may sleep).
3330 static void ata_scsi_remove_dev(struct ata_device *dev)
3332 struct ata_port *ap = dev->link->ap;
3333 struct scsi_device *sdev;
3334 unsigned long flags;
3336 /* Alas, we need to grab scan_mutex to ensure SCSI device
3337 * state doesn't change underneath us and thus
3338 * scsi_device_get() always succeeds. The mutex locking can
3339 * be removed if there is __scsi_device_get() interface which
3340 * increments reference counts regardless of device state.
3342 mutex_lock(&ap->scsi_host->scan_mutex);
3343 spin_lock_irqsave(ap->lock, flags);
3345 /* clearing dev->sdev is protected by host lock */
3350 /* If user initiated unplug races with us, sdev can go
3351 * away underneath us after the host lock and
3352 * scan_mutex are released. Hold onto it.
3354 if (scsi_device_get(sdev) == 0) {
3355 /* The following ensures the attached sdev is
3356 * offline on return from ata_scsi_offline_dev()
3357 * regardless it wins or loses the race
3358 * against this function.
3360 scsi_device_set_state(sdev, SDEV_OFFLINE);
3367 spin_unlock_irqrestore(ap->lock, flags);
3368 mutex_unlock(&ap->scsi_host->scan_mutex);
3371 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3372 sdev->sdev_gendev.bus_id);
3374 scsi_remove_device(sdev);
3375 scsi_device_put(sdev);
3379 static void ata_scsi_handle_link_detach(struct ata_link *link)
3381 struct ata_port *ap = link->ap;
3382 struct ata_device *dev;
3384 ata_for_each_dev(dev, link, ALL) {
3385 unsigned long flags;
3387 if (!(dev->flags & ATA_DFLAG_DETACHED))
3390 spin_lock_irqsave(ap->lock, flags);
3391 dev->flags &= ~ATA_DFLAG_DETACHED;
3392 spin_unlock_irqrestore(ap->lock, flags);
3394 ata_scsi_remove_dev(dev);
3399 * ata_scsi_media_change_notify - send media change event
3400 * @dev: Pointer to the disk device with media change event
3402 * Tell the block layer to send a media change notification
3406 * spin_lock_irqsave(host lock)
3408 void ata_scsi_media_change_notify(struct ata_device *dev)
3411 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3416 * ata_scsi_hotplug - SCSI part of hotplug
3417 * @work: Pointer to ATA port to perform SCSI hotplug on
3419 * Perform SCSI part of hotplug. It's executed from a separate
3420 * workqueue after EH completes. This is necessary because SCSI
3421 * hot plugging requires working EH and hot unplugging is
3422 * synchronized with hot plugging with a mutex.
3425 * Kernel thread context (may sleep).
3427 void ata_scsi_hotplug(struct work_struct *work)
3429 struct ata_port *ap =
3430 container_of(work, struct ata_port, hotplug_task.work);
3433 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3434 DPRINTK("ENTER/EXIT - unloading\n");
3440 /* Unplug detached devices. We cannot use link iterator here
3441 * because PMP links have to be scanned even if PMP is
3442 * currently not attached. Iterate manually.
3444 ata_scsi_handle_link_detach(&ap->link);
3446 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3447 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3449 /* scan for new ones */
3450 ata_scsi_scan_host(ap, 0);
3456 * ata_scsi_user_scan - indication for user-initiated bus scan
3457 * @shost: SCSI host to scan
3458 * @channel: Channel to scan
3462 * This function is called when user explicitly requests bus
3463 * scan. Set probe pending flag and invoke EH.
3466 * SCSI layer (we don't care)
3471 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3472 unsigned int id, unsigned int lun)
3474 struct ata_port *ap = ata_shost_to_port(shost);
3475 unsigned long flags;
3478 if (!ap->ops->error_handler)
3481 if (lun != SCAN_WILD_CARD && lun)
3484 if (!sata_pmp_attached(ap)) {
3485 if (channel != SCAN_WILD_CARD && channel)
3489 if (id != SCAN_WILD_CARD && id)
3494 spin_lock_irqsave(ap->lock, flags);
3496 if (devno == SCAN_WILD_CARD) {
3497 struct ata_link *link;
3499 ata_for_each_link(link, ap, EDGE) {
3500 struct ata_eh_info *ehi = &link->eh_info;
3501 ehi->probe_mask |= ATA_ALL_DEVICES;
3502 ehi->action |= ATA_EH_RESET;
3505 struct ata_device *dev = ata_find_dev(ap, devno);
3508 struct ata_eh_info *ehi = &dev->link->eh_info;
3509 ehi->probe_mask |= 1 << dev->devno;
3510 ehi->action |= ATA_EH_RESET;
3516 ata_port_schedule_eh(ap);
3517 spin_unlock_irqrestore(ap->lock, flags);
3518 ata_port_wait_eh(ap);
3520 spin_unlock_irqrestore(ap->lock, flags);
3526 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3527 * @work: Pointer to ATA port to perform scsi_rescan_device()
3529 * After ATA pass thru (SAT) commands are executed successfully,
3530 * libata need to propagate the changes to SCSI layer. This
3531 * function must be executed from ata_aux_wq such that sdev
3532 * attach/detach don't race with rescan.
3535 * Kernel thread context (may sleep).
3537 void ata_scsi_dev_rescan(struct work_struct *work)
3539 struct ata_port *ap =
3540 container_of(work, struct ata_port, scsi_rescan_task);
3541 struct ata_link *link;
3542 struct ata_device *dev;
3543 unsigned long flags;
3545 spin_lock_irqsave(ap->lock, flags);
3547 ata_for_each_link(link, ap, EDGE) {
3548 ata_for_each_dev(dev, link, ENABLED) {
3549 struct scsi_device *sdev = dev->sdev;
3553 if (scsi_device_get(sdev))
3556 spin_unlock_irqrestore(ap->lock, flags);
3557 scsi_rescan_device(&(sdev->sdev_gendev));
3558 scsi_device_put(sdev);
3559 spin_lock_irqsave(ap->lock, flags);
3563 spin_unlock_irqrestore(ap->lock, flags);
3567 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3568 * @host: ATA host container for all SAS ports
3569 * @port_info: Information from low-level host driver
3570 * @shost: SCSI host that the scsi device is attached to
3573 * PCI/etc. bus probe sem.
3576 * ata_port pointer on success / NULL on failure.
3579 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3580 struct ata_port_info *port_info,
3581 struct Scsi_Host *shost)
3583 struct ata_port *ap;
3585 ap = ata_port_alloc(host);
3590 ap->lock = shost->host_lock;
3591 ap->pio_mask = port_info->pio_mask;
3592 ap->mwdma_mask = port_info->mwdma_mask;
3593 ap->udma_mask = port_info->udma_mask;
3594 ap->flags |= port_info->flags;
3595 ap->ops = port_info->port_ops;
3596 ap->cbl = ATA_CBL_SATA;
3600 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3603 * ata_sas_port_start - Set port up for dma.
3604 * @ap: Port to initialize
3606 * Called just after data structures for each port are
3609 * May be used as the port_start() entry in ata_port_operations.
3612 * Inherited from caller.
3614 int ata_sas_port_start(struct ata_port *ap)
3618 EXPORT_SYMBOL_GPL(ata_sas_port_start);
3621 * ata_port_stop - Undo ata_sas_port_start()
3622 * @ap: Port to shut down
3624 * May be used as the port_stop() entry in ata_port_operations.
3627 * Inherited from caller.
3630 void ata_sas_port_stop(struct ata_port *ap)
3633 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3636 * ata_sas_port_init - Initialize a SATA device
3637 * @ap: SATA port to initialize
3640 * PCI/etc. bus probe sem.
3643 * Zero on success, non-zero on error.
3646 int ata_sas_port_init(struct ata_port *ap)
3648 int rc = ap->ops->port_start(ap);
3651 ap->print_id = ata_print_id++;
3652 rc = ata_bus_probe(ap);
3657 EXPORT_SYMBOL_GPL(ata_sas_port_init);
3660 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3661 * @ap: SATA port to destroy
3665 void ata_sas_port_destroy(struct ata_port *ap)
3667 if (ap->ops->port_stop)
3668 ap->ops->port_stop(ap);
3671 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3674 * ata_sas_slave_configure - Default slave_config routine for libata devices
3675 * @sdev: SCSI device to configure
3676 * @ap: ATA port to which SCSI device is attached
3682 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3684 ata_scsi_sdev_config(sdev);
3685 ata_scsi_dev_config(sdev, ap->link.device);
3688 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3691 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3692 * @cmd: SCSI command to be sent
3693 * @done: Completion function, called when command is complete
3694 * @ap: ATA port to which the command is being sent
3697 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3701 int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3702 struct ata_port *ap)
3706 ata_scsi_dump_cdb(ap, cmd);
3708 if (likely(ata_dev_enabled(ap->link.device)))
3709 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
3711 cmd->result = (DID_BAD_TARGET << 16);
3716 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);