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/slab.h>
37 #include <linux/kernel.h>
38 #include <linux/blkdev.h>
39 #include <linux/spinlock.h>
40 #include <scsi/scsi.h>
41 #include <scsi/scsi_host.h>
42 #include <scsi/scsi_cmnd.h>
43 #include <scsi/scsi_eh.h>
44 #include <scsi/scsi_device.h>
45 #include <scsi/scsi_tcq.h>
46 #include <scsi/scsi_transport.h>
47 #include <linux/libata.h>
48 #include <linux/hdreg.h>
49 #include <linux/uaccess.h>
50 #include <linux/suspend.h>
51 #include <asm/unaligned.h>
54 #include "libata-transport.h"
56 #define ATA_SCSI_RBUF_SIZE 4096
58 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
59 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
61 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
63 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
64 const struct scsi_device *scsidev);
65 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
66 const struct scsi_device *scsidev);
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 */
106 static const char *ata_lpm_policy_names[] = {
107 [ATA_LPM_UNKNOWN] = "max_performance",
108 [ATA_LPM_MAX_POWER] = "max_performance",
109 [ATA_LPM_MED_POWER] = "medium_power",
110 [ATA_LPM_MIN_POWER] = "min_power",
113 static ssize_t ata_scsi_lpm_store(struct device *dev,
114 struct device_attribute *attr,
115 const char *buf, size_t count)
117 struct Scsi_Host *shost = class_to_shost(dev);
118 struct ata_port *ap = ata_shost_to_port(shost);
119 enum ata_lpm_policy policy;
122 /* UNKNOWN is internal state, iterate from MAX_POWER */
123 for (policy = ATA_LPM_MAX_POWER;
124 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
125 const char *name = ata_lpm_policy_names[policy];
127 if (strncmp(name, buf, strlen(name)) == 0)
130 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
133 spin_lock_irqsave(ap->lock, flags);
134 ap->target_lpm_policy = policy;
135 ata_port_schedule_eh(ap);
136 spin_unlock_irqrestore(ap->lock, flags);
141 static ssize_t ata_scsi_lpm_show(struct device *dev,
142 struct device_attribute *attr, char *buf)
144 struct Scsi_Host *shost = class_to_shost(dev);
145 struct ata_port *ap = ata_shost_to_port(shost);
147 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
150 return snprintf(buf, PAGE_SIZE, "%s\n",
151 ata_lpm_policy_names[ap->target_lpm_policy]);
153 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
154 ata_scsi_lpm_show, ata_scsi_lpm_store);
155 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
157 static ssize_t ata_scsi_park_show(struct device *device,
158 struct device_attribute *attr, char *buf)
160 struct scsi_device *sdev = to_scsi_device(device);
162 struct ata_link *link;
163 struct ata_device *dev;
164 unsigned long flags, now;
165 unsigned int uninitialized_var(msecs);
168 ap = ata_shost_to_port(sdev->host);
170 spin_lock_irqsave(ap->lock, flags);
171 dev = ata_scsi_find_dev(ap, sdev);
176 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
183 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
184 link->eh_context.unloaded_mask & (1 << dev->devno) &&
185 time_after(dev->unpark_deadline, now))
186 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
191 spin_unlock_irq(ap->lock);
193 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
196 static ssize_t ata_scsi_park_store(struct device *device,
197 struct device_attribute *attr,
198 const char *buf, size_t len)
200 struct scsi_device *sdev = to_scsi_device(device);
202 struct ata_device *dev;
207 rc = strict_strtol(buf, 10, &input);
208 if (rc || input < -2)
210 if (input > ATA_TMOUT_MAX_PARK) {
212 input = ATA_TMOUT_MAX_PARK;
215 ap = ata_shost_to_port(sdev->host);
217 spin_lock_irqsave(ap->lock, flags);
218 dev = ata_scsi_find_dev(ap, sdev);
219 if (unlikely(!dev)) {
223 if (dev->class != ATA_DEV_ATA) {
229 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
234 dev->unpark_deadline = ata_deadline(jiffies, input);
235 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
236 ata_port_schedule_eh(ap);
237 complete(&ap->park_req_pending);
241 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
244 dev->flags |= ATA_DFLAG_NO_UNLOAD;
249 spin_unlock_irqrestore(ap->lock, flags);
251 return rc ? rc : len;
253 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
254 ata_scsi_park_show, ata_scsi_park_store);
255 EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
257 static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
259 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
261 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
265 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
266 const char *buf, size_t count)
268 struct Scsi_Host *shost = class_to_shost(dev);
269 struct ata_port *ap = ata_shost_to_port(shost);
270 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
271 return ap->ops->em_store(ap, buf, count);
276 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
279 struct Scsi_Host *shost = class_to_shost(dev);
280 struct ata_port *ap = ata_shost_to_port(shost);
282 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
283 return ap->ops->em_show(ap, buf);
286 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
287 ata_scsi_em_message_show, ata_scsi_em_message_store);
288 EXPORT_SYMBOL_GPL(dev_attr_em_message);
291 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
294 struct Scsi_Host *shost = class_to_shost(dev);
295 struct ata_port *ap = ata_shost_to_port(shost);
297 return snprintf(buf, 23, "%d\n", ap->em_message_type);
299 DEVICE_ATTR(em_message_type, S_IRUGO,
300 ata_scsi_em_message_type_show, NULL);
301 EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
304 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
307 struct scsi_device *sdev = to_scsi_device(dev);
308 struct ata_port *ap = ata_shost_to_port(sdev->host);
309 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
311 if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY))
312 return ap->ops->sw_activity_show(atadev, buf);
317 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
318 const char *buf, size_t count)
320 struct scsi_device *sdev = to_scsi_device(dev);
321 struct ata_port *ap = ata_shost_to_port(sdev->host);
322 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
323 enum sw_activity val;
326 if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
327 val = simple_strtoul(buf, NULL, 0);
329 case OFF: case BLINK_ON: case BLINK_OFF:
330 rc = ap->ops->sw_activity_store(atadev, val);
339 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
340 ata_scsi_activity_store);
341 EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
343 struct device_attribute *ata_common_sdev_attrs[] = {
344 &dev_attr_unload_heads,
347 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
349 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd)
351 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
352 /* "Invalid field in cbd" */
357 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
358 * @sdev: SCSI device for which BIOS geometry is to be determined
359 * @bdev: block device associated with @sdev
360 * @capacity: capacity of SCSI device
361 * @geom: location to which geometry will be output
363 * Generic bios head/sector/cylinder calculator
364 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
365 * mapping. Some situations may arise where the disk is not
366 * bootable if this is not used.
369 * Defined by the SCSI layer. We don't really care.
374 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
375 sector_t capacity, int geom[])
379 sector_div(capacity, 255*63);
386 * ata_scsi_unlock_native_capacity - unlock native capacity
387 * @sdev: SCSI device to adjust device capacity for
389 * This function is called if a partition on @sdev extends beyond
390 * the end of the device. It requests EH to unlock HPA.
393 * Defined by the SCSI layer. Might sleep.
395 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
397 struct ata_port *ap = ata_shost_to_port(sdev->host);
398 struct ata_device *dev;
401 spin_lock_irqsave(ap->lock, flags);
403 dev = ata_scsi_find_dev(ap, sdev);
404 if (dev && dev->n_sectors < dev->n_native_sectors) {
405 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
406 dev->link->eh_info.action |= ATA_EH_RESET;
407 ata_port_schedule_eh(ap);
410 spin_unlock_irqrestore(ap->lock, flags);
411 ata_port_wait_eh(ap);
415 * 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 = ATA_SECT_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 static int ata_ioc32(struct ata_port *ap)
650 if (ap->flags & ATA_FLAG_PIO_DMA)
652 if (ap->pflags & ATA_PFLAG_PIO32)
657 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
658 int cmd, void __user *arg)
660 int val = -EINVAL, rc = -EINVAL;
664 case ATA_IOC_GET_IO32:
665 spin_lock_irqsave(ap->lock, flags);
667 spin_unlock_irqrestore(ap->lock, flags);
668 if (copy_to_user(arg, &val, 1))
672 case ATA_IOC_SET_IO32:
673 val = (unsigned long) arg;
675 spin_lock_irqsave(ap->lock, flags);
676 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
678 ap->pflags |= ATA_PFLAG_PIO32;
680 ap->pflags &= ~ATA_PFLAG_PIO32;
682 if (val != ata_ioc32(ap))
685 spin_unlock_irqrestore(ap->lock, flags);
688 case HDIO_GET_IDENTITY:
689 return ata_get_identity(ap, scsidev, arg);
692 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
694 return ata_cmd_ioctl(scsidev, arg);
696 case HDIO_DRIVE_TASK:
697 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
699 return ata_task_ioctl(scsidev, arg);
708 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
710 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
712 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
715 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
718 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
719 * @dev: ATA device to which the new command is attached
720 * @cmd: SCSI command that originated this ATA command
722 * Obtain a reference to an unused ata_queued_cmd structure,
723 * which is the basic libata structure representing a single
724 * ATA command sent to the hardware.
726 * If a command was available, fill in the SCSI-specific
727 * portions of the structure with information on the
731 * spin_lock_irqsave(host lock)
734 * Command allocated, or %NULL if none available.
736 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
737 struct scsi_cmnd *cmd)
739 struct ata_queued_cmd *qc;
741 qc = ata_qc_new_init(dev);
744 qc->scsidone = cmd->scsi_done;
746 qc->sg = scsi_sglist(cmd);
747 qc->n_elem = scsi_sg_count(cmd);
749 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
756 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
758 struct scsi_cmnd *scmd = qc->scsicmd;
760 qc->extrabytes = scmd->request->extra_len;
761 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
765 * ata_dump_status - user friendly display of error info
766 * @id: id of the port in question
767 * @tf: ptr to filled out taskfile
769 * Decode and dump the ATA error/status registers for the user so
770 * that they have some idea what really happened at the non
771 * make-believe layer.
774 * inherited from caller
776 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
778 u8 stat = tf->command, err = tf->feature;
780 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
781 if (stat & ATA_BUSY) {
782 printk("Busy }\n"); /* Data is not valid in this case */
784 if (stat & 0x40) printk("DriveReady ");
785 if (stat & 0x20) printk("DeviceFault ");
786 if (stat & 0x10) printk("SeekComplete ");
787 if (stat & 0x08) printk("DataRequest ");
788 if (stat & 0x04) printk("CorrectedError ");
789 if (stat & 0x02) printk("Index ");
790 if (stat & 0x01) printk("Error ");
794 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
795 if (err & 0x04) printk("DriveStatusError ");
797 if (err & 0x04) printk("BadCRC ");
798 else printk("Sector ");
800 if (err & 0x40) printk("UncorrectableError ");
801 if (err & 0x10) printk("SectorIdNotFound ");
802 if (err & 0x02) printk("TrackZeroNotFound ");
803 if (err & 0x01) printk("AddrMarkNotFound ");
810 * ata_to_sense_error - convert ATA error to SCSI error
811 * @id: ATA device number
812 * @drv_stat: value contained in ATA status register
813 * @drv_err: value contained in ATA error register
814 * @sk: the sense key we'll fill out
815 * @asc: the additional sense code we'll fill out
816 * @ascq: the additional sense code qualifier we'll fill out
817 * @verbose: be verbose
819 * Converts an ATA error into a SCSI error. Fill out pointers to
820 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
821 * format sense blocks.
824 * spin_lock_irqsave(host lock)
826 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
827 u8 *asc, u8 *ascq, int verbose)
831 /* Based on the 3ware driver translation table */
832 static const unsigned char sense_table[][4] = {
834 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
836 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
838 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
839 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
840 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
841 /* MC|ID|ABRT|TRK0|MARK */
842 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
844 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
845 /* Bad address mark */
846 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
848 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
850 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
851 /* Media change request */
852 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
854 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
856 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
858 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
859 /* BBD - block marked bad */
860 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
861 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
863 static const unsigned char stat_table[][4] = {
864 /* Must be first because BUSY means no other bits valid */
865 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
866 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
867 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
868 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
869 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
873 * Is this an error we can process/parse
875 if (drv_stat & ATA_BUSY) {
876 drv_err = 0; /* Ignore the err bits, they're invalid */
880 /* Look for drv_err */
881 for (i = 0; sense_table[i][0] != 0xFF; i++) {
882 /* Look for best matches first */
883 if ((sense_table[i][0] & drv_err) ==
885 *sk = sense_table[i][1];
886 *asc = sense_table[i][2];
887 *ascq = sense_table[i][3];
891 /* No immediate match */
893 printk(KERN_WARNING "ata%u: no sense translation for "
894 "error 0x%02x\n", id, drv_err);
897 /* Fall back to interpreting status bits */
898 for (i = 0; stat_table[i][0] != 0xFF; i++) {
899 if (stat_table[i][0] & drv_stat) {
900 *sk = stat_table[i][1];
901 *asc = stat_table[i][2];
902 *ascq = stat_table[i][3];
906 /* No error? Undecoded? */
908 printk(KERN_WARNING "ata%u: no sense translation for "
909 "status: 0x%02x\n", id, drv_stat);
911 /* We need a sensible error return here, which is tricky, and one
912 that won't cause people to do things like return a disk wrongly */
913 *sk = ABORTED_COMMAND;
919 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
920 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
921 id, drv_stat, drv_err, *sk, *asc, *ascq);
926 * ata_gen_passthru_sense - Generate check condition sense block.
927 * @qc: Command that completed.
929 * This function is specific to the ATA descriptor format sense
930 * block specified for the ATA pass through commands. Regardless
931 * of whether the command errored or not, return a sense
932 * block. Copy all controller registers into the sense
933 * block. Clear sense key, ASC & ASCQ if there is no error.
938 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
940 struct scsi_cmnd *cmd = qc->scsicmd;
941 struct ata_taskfile *tf = &qc->result_tf;
942 unsigned char *sb = cmd->sense_buffer;
943 unsigned char *desc = sb + 8;
944 int verbose = qc->ap->ops->error_handler == NULL;
946 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
948 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
951 * Use ata_to_sense_error() to map status register bits
952 * onto sense key, asc & ascq.
955 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
956 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
957 &sb[1], &sb[2], &sb[3], verbose);
962 * Sense data is current and format is descriptor.
968 /* set length of additional sense data */
973 * Copy registers into sense buffer.
976 desc[3] = tf->feature; /* == error reg */
981 desc[12] = tf->device;
982 desc[13] = tf->command; /* == status reg */
985 * Fill in Extend bit, and the high order bytes
988 if (tf->flags & ATA_TFLAG_LBA48) {
990 desc[4] = tf->hob_nsect;
991 desc[6] = tf->hob_lbal;
992 desc[8] = tf->hob_lbam;
993 desc[10] = tf->hob_lbah;
998 * ata_gen_ata_sense - generate a SCSI fixed sense block
999 * @qc: Command that we are erroring out
1001 * Generate sense block for a failed ATA command @qc. Descriptor
1002 * format is used to accomodate LBA48 block address.
1007 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1009 struct ata_device *dev = qc->dev;
1010 struct scsi_cmnd *cmd = qc->scsicmd;
1011 struct ata_taskfile *tf = &qc->result_tf;
1012 unsigned char *sb = cmd->sense_buffer;
1013 unsigned char *desc = sb + 8;
1014 int verbose = qc->ap->ops->error_handler == NULL;
1017 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1019 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1021 /* sense data is current and format is descriptor */
1024 /* Use ata_to_sense_error() to map status register bits
1025 * onto sense key, asc & ascq.
1028 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1029 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1030 &sb[1], &sb[2], &sb[3], verbose);
1034 block = ata_tf_read_block(&qc->result_tf, dev);
1036 /* information sense data descriptor */
1041 desc[2] |= 0x80; /* valid */
1042 desc[6] = block >> 40;
1043 desc[7] = block >> 32;
1044 desc[8] = block >> 24;
1045 desc[9] = block >> 16;
1046 desc[10] = block >> 8;
1050 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1052 sdev->use_10_for_rw = 1;
1053 sdev->use_10_for_ms = 1;
1055 /* Schedule policy is determined by ->qc_defer() callback and
1056 * it needs to see every deferred qc. Set dev_blocked to 1 to
1057 * prevent SCSI midlayer from automatically deferring
1060 sdev->max_device_blocked = 1;
1064 * atapi_drain_needed - Check whether data transfer may overflow
1065 * @rq: request to be checked
1067 * ATAPI commands which transfer variable length data to host
1068 * might overflow due to application error or hardare bug. This
1069 * function checks whether overflow should be drained and ignored
1076 * 1 if ; otherwise, 0.
1078 static int atapi_drain_needed(struct request *rq)
1080 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
1083 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
1086 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1089 static int ata_scsi_dev_config(struct scsi_device *sdev,
1090 struct ata_device *dev)
1092 if (!ata_id_has_unload(dev->id))
1093 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1095 /* configure max sectors */
1096 blk_queue_max_hw_sectors(sdev->request_queue, dev->max_sectors);
1098 if (dev->class == ATA_DEV_ATAPI) {
1099 struct request_queue *q = sdev->request_queue;
1102 /* set the min alignment and padding */
1103 blk_queue_update_dma_alignment(sdev->request_queue,
1104 ATA_DMA_PAD_SZ - 1);
1105 blk_queue_update_dma_pad(sdev->request_queue,
1106 ATA_DMA_PAD_SZ - 1);
1108 /* configure draining */
1109 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1111 ata_dev_printk(dev, KERN_ERR,
1112 "drain buffer allocation failed\n");
1116 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1118 /* ATA devices must be sector aligned */
1119 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1120 blk_queue_update_dma_alignment(sdev->request_queue,
1121 sdev->sector_size - 1);
1122 sdev->manage_start_stop = 1;
1125 if (dev->flags & ATA_DFLAG_AN)
1126 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1128 if (dev->flags & ATA_DFLAG_NCQ) {
1131 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1132 depth = min(ATA_MAX_QUEUE - 1, depth);
1133 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
1141 * ata_scsi_slave_config - Set SCSI device attributes
1142 * @sdev: SCSI device to examine
1144 * This is called before we actually start reading
1145 * and writing to the device, to configure certain
1146 * SCSI mid-layer behaviors.
1149 * Defined by SCSI layer. We don't really care.
1152 int ata_scsi_slave_config(struct scsi_device *sdev)
1154 struct ata_port *ap = ata_shost_to_port(sdev->host);
1155 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1158 ata_scsi_sdev_config(sdev);
1161 rc = ata_scsi_dev_config(sdev, dev);
1167 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1168 * @sdev: SCSI device to be destroyed
1170 * @sdev is about to be destroyed for hot/warm unplugging. If
1171 * this unplugging was initiated by libata as indicated by NULL
1172 * dev->sdev, this function doesn't have to do anything.
1173 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1174 * Clear dev->sdev, schedule the device for ATA detach and invoke
1178 * Defined by SCSI layer. We don't really care.
1180 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1182 struct ata_port *ap = ata_shost_to_port(sdev->host);
1183 struct request_queue *q = sdev->request_queue;
1184 unsigned long flags;
1185 struct ata_device *dev;
1187 if (!ap->ops->error_handler)
1190 spin_lock_irqsave(ap->lock, flags);
1191 dev = __ata_scsi_find_dev(ap, sdev);
1192 if (dev && dev->sdev) {
1193 /* SCSI device already in CANCEL state, no need to offline it */
1195 dev->flags |= ATA_DFLAG_DETACH;
1196 ata_port_schedule_eh(ap);
1198 spin_unlock_irqrestore(ap->lock, flags);
1200 kfree(q->dma_drain_buffer);
1201 q->dma_drain_buffer = NULL;
1202 q->dma_drain_size = 0;
1206 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1207 * @sdev: SCSI device to configure queue depth for
1208 * @queue_depth: new queue depth
1209 * @reason: calling context
1211 * This is libata standard hostt->change_queue_depth callback.
1212 * SCSI will call into this callback when user tries to set queue
1216 * SCSI layer (we don't care)
1219 * Newly configured queue depth.
1221 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth,
1224 struct ata_port *ap = ata_shost_to_port(sdev->host);
1225 struct ata_device *dev;
1226 unsigned long flags;
1228 if (reason != SCSI_QDEPTH_DEFAULT)
1231 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1232 return sdev->queue_depth;
1234 dev = ata_scsi_find_dev(ap, sdev);
1235 if (!dev || !ata_dev_enabled(dev))
1236 return sdev->queue_depth;
1239 spin_lock_irqsave(ap->lock, flags);
1240 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1241 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1242 dev->flags |= ATA_DFLAG_NCQ_OFF;
1245 spin_unlock_irqrestore(ap->lock, flags);
1247 /* limit and apply queue depth */
1248 queue_depth = min(queue_depth, sdev->host->can_queue);
1249 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1250 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1252 if (sdev->queue_depth == queue_depth)
1255 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
1260 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1261 * @qc: Storage for translated ATA taskfile
1263 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1264 * (to start). Perhaps these commands should be preceded by
1265 * CHECK POWER MODE to see what power mode the device is already in.
1266 * [See SAT revision 5 at www.t10.org]
1269 * spin_lock_irqsave(host lock)
1272 * Zero on success, non-zero on error.
1274 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1276 struct scsi_cmnd *scmd = qc->scsicmd;
1277 struct ata_taskfile *tf = &qc->tf;
1278 const u8 *cdb = scmd->cmnd;
1280 if (scmd->cmd_len < 5)
1283 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1284 tf->protocol = ATA_PROT_NODATA;
1286 ; /* ignore IMMED bit, violates sat-r05 */
1289 goto invalid_fld; /* LOEJ bit set not supported */
1290 if (((cdb[4] >> 4) & 0xf) != 0)
1291 goto invalid_fld; /* power conditions not supported */
1294 tf->nsect = 1; /* 1 sector, lba=0 */
1296 if (qc->dev->flags & ATA_DFLAG_LBA) {
1297 tf->flags |= ATA_TFLAG_LBA;
1302 tf->device |= ATA_LBA;
1305 tf->lbal = 0x1; /* sect */
1306 tf->lbam = 0x0; /* cyl low */
1307 tf->lbah = 0x0; /* cyl high */
1310 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1312 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1313 * or S5) causing some drives to spin up and down again.
1315 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1316 system_state == SYSTEM_POWER_OFF)
1319 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1320 system_entering_hibernation())
1323 /* Issue ATA STANDBY IMMEDIATE command */
1324 tf->command = ATA_CMD_STANDBYNOW1;
1328 * Standby and Idle condition timers could be implemented but that
1329 * would require libata to implement the Power condition mode page
1330 * and allow the user to change it. Changing mode pages requires
1331 * MODE SELECT to be implemented.
1337 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1338 /* "Invalid field in cbd" */
1341 scmd->result = SAM_STAT_GOOD;
1347 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1348 * @qc: Storage for translated ATA taskfile
1350 * Sets up an ATA taskfile to issue FLUSH CACHE or
1354 * spin_lock_irqsave(host lock)
1357 * Zero on success, non-zero on error.
1359 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1361 struct ata_taskfile *tf = &qc->tf;
1363 tf->flags |= ATA_TFLAG_DEVICE;
1364 tf->protocol = ATA_PROT_NODATA;
1366 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1367 tf->command = ATA_CMD_FLUSH_EXT;
1369 tf->command = ATA_CMD_FLUSH;
1371 /* flush is critical for IO integrity, consider it an IO command */
1372 qc->flags |= ATA_QCFLAG_IO;
1378 * scsi_6_lba_len - Get LBA and transfer length
1379 * @cdb: SCSI command to translate
1381 * Calculate LBA and transfer length for 6-byte commands.
1385 * @plen: the transfer length
1387 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1392 VPRINTK("six-byte command\n");
1394 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1395 lba |= ((u64)cdb[2]) << 8;
1396 lba |= ((u64)cdb[3]);
1405 * scsi_10_lba_len - Get LBA and transfer length
1406 * @cdb: SCSI command to translate
1408 * Calculate LBA and transfer length for 10-byte commands.
1412 * @plen: the transfer length
1414 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1419 VPRINTK("ten-byte command\n");
1421 lba |= ((u64)cdb[2]) << 24;
1422 lba |= ((u64)cdb[3]) << 16;
1423 lba |= ((u64)cdb[4]) << 8;
1424 lba |= ((u64)cdb[5]);
1426 len |= ((u32)cdb[7]) << 8;
1427 len |= ((u32)cdb[8]);
1434 * scsi_16_lba_len - Get LBA and transfer length
1435 * @cdb: SCSI command to translate
1437 * Calculate LBA and transfer length for 16-byte commands.
1441 * @plen: the transfer length
1443 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1448 VPRINTK("sixteen-byte command\n");
1450 lba |= ((u64)cdb[2]) << 56;
1451 lba |= ((u64)cdb[3]) << 48;
1452 lba |= ((u64)cdb[4]) << 40;
1453 lba |= ((u64)cdb[5]) << 32;
1454 lba |= ((u64)cdb[6]) << 24;
1455 lba |= ((u64)cdb[7]) << 16;
1456 lba |= ((u64)cdb[8]) << 8;
1457 lba |= ((u64)cdb[9]);
1459 len |= ((u32)cdb[10]) << 24;
1460 len |= ((u32)cdb[11]) << 16;
1461 len |= ((u32)cdb[12]) << 8;
1462 len |= ((u32)cdb[13]);
1469 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1470 * @qc: Storage for translated ATA taskfile
1472 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1475 * spin_lock_irqsave(host lock)
1478 * Zero on success, non-zero on error.
1480 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1482 struct scsi_cmnd *scmd = qc->scsicmd;
1483 struct ata_taskfile *tf = &qc->tf;
1484 struct ata_device *dev = qc->dev;
1485 u64 dev_sectors = qc->dev->n_sectors;
1486 const u8 *cdb = scmd->cmnd;
1490 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1491 tf->protocol = ATA_PROT_NODATA;
1493 if (cdb[0] == VERIFY) {
1494 if (scmd->cmd_len < 10)
1496 scsi_10_lba_len(cdb, &block, &n_block);
1497 } else if (cdb[0] == VERIFY_16) {
1498 if (scmd->cmd_len < 16)
1500 scsi_16_lba_len(cdb, &block, &n_block);
1506 if (block >= dev_sectors)
1508 if ((block + n_block) > dev_sectors)
1511 if (dev->flags & ATA_DFLAG_LBA) {
1512 tf->flags |= ATA_TFLAG_LBA;
1514 if (lba_28_ok(block, n_block)) {
1516 tf->command = ATA_CMD_VERIFY;
1517 tf->device |= (block >> 24) & 0xf;
1518 } else if (lba_48_ok(block, n_block)) {
1519 if (!(dev->flags & ATA_DFLAG_LBA48))
1523 tf->flags |= ATA_TFLAG_LBA48;
1524 tf->command = ATA_CMD_VERIFY_EXT;
1526 tf->hob_nsect = (n_block >> 8) & 0xff;
1528 tf->hob_lbah = (block >> 40) & 0xff;
1529 tf->hob_lbam = (block >> 32) & 0xff;
1530 tf->hob_lbal = (block >> 24) & 0xff;
1532 /* request too large even for LBA48 */
1535 tf->nsect = n_block & 0xff;
1537 tf->lbah = (block >> 16) & 0xff;
1538 tf->lbam = (block >> 8) & 0xff;
1539 tf->lbal = block & 0xff;
1541 tf->device |= ATA_LBA;
1544 u32 sect, head, cyl, track;
1546 if (!lba_28_ok(block, n_block))
1549 /* Convert LBA to CHS */
1550 track = (u32)block / dev->sectors;
1551 cyl = track / dev->heads;
1552 head = track % dev->heads;
1553 sect = (u32)block % dev->sectors + 1;
1555 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1556 (u32)block, track, cyl, head, sect);
1558 /* Check whether the converted CHS can fit.
1562 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1565 tf->command = ATA_CMD_VERIFY;
1566 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1569 tf->lbah = cyl >> 8;
1576 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1577 /* "Invalid field in cbd" */
1581 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1582 /* "Logical Block Address out of range" */
1586 scmd->result = SAM_STAT_GOOD;
1591 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1592 * @qc: Storage for translated ATA taskfile
1594 * Converts any of six SCSI read/write commands into the
1595 * ATA counterpart, including starting sector (LBA),
1596 * sector count, and taking into account the device's LBA48
1599 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1600 * %WRITE_16 are currently supported.
1603 * spin_lock_irqsave(host lock)
1606 * Zero on success, non-zero on error.
1608 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1610 struct scsi_cmnd *scmd = qc->scsicmd;
1611 const u8 *cdb = scmd->cmnd;
1612 unsigned int tf_flags = 0;
1617 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1618 tf_flags |= ATA_TFLAG_WRITE;
1620 /* Calculate the SCSI LBA, transfer length and FUA. */
1624 if (unlikely(scmd->cmd_len < 10))
1626 scsi_10_lba_len(cdb, &block, &n_block);
1627 if (unlikely(cdb[1] & (1 << 3)))
1628 tf_flags |= ATA_TFLAG_FUA;
1632 if (unlikely(scmd->cmd_len < 6))
1634 scsi_6_lba_len(cdb, &block, &n_block);
1636 /* for 6-byte r/w commands, transfer length 0
1637 * means 256 blocks of data, not 0 block.
1644 if (unlikely(scmd->cmd_len < 16))
1646 scsi_16_lba_len(cdb, &block, &n_block);
1647 if (unlikely(cdb[1] & (1 << 3)))
1648 tf_flags |= ATA_TFLAG_FUA;
1651 DPRINTK("no-byte command\n");
1655 /* Check and compose ATA command */
1657 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1658 * length 0 means transfer 0 block of data.
1659 * However, for ATA R/W commands, sector count 0 means
1660 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1662 * WARNING: one or two older ATA drives treat 0 as 0...
1666 qc->flags |= ATA_QCFLAG_IO;
1667 qc->nbytes = n_block * scmd->device->sector_size;
1669 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1671 if (likely(rc == 0))
1676 /* treat all other errors as -EINVAL, fall through */
1678 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1679 /* "Invalid field in cbd" */
1683 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1684 /* "Logical Block Address out of range" */
1688 scmd->result = SAM_STAT_GOOD;
1692 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1694 struct ata_port *ap = qc->ap;
1695 struct scsi_cmnd *cmd = qc->scsicmd;
1696 u8 *cdb = cmd->cmnd;
1697 int need_sense = (qc->err_mask != 0);
1699 /* For ATA pass thru (SAT) commands, generate a sense block if
1700 * user mandated it or if there's an error. Note that if we
1701 * generate because the user forced us to, a check condition
1702 * is generated and the ATA register values are returned
1703 * whether the command completed successfully or not. If there
1704 * was no error, SK, ASC and ASCQ will all be zero.
1706 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1707 ((cdb[2] & 0x20) || need_sense)) {
1708 ata_gen_passthru_sense(qc);
1711 cmd->result = SAM_STAT_GOOD;
1713 /* TODO: decide which descriptor format to use
1714 * for 48b LBA devices and call that here
1715 * instead of the fixed desc, which is only
1716 * good for smaller LBA (and maybe CHS?)
1719 ata_gen_ata_sense(qc);
1723 if (need_sense && !ap->ops->error_handler)
1724 ata_dump_status(ap->print_id, &qc->result_tf);
1732 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1733 * @dev: ATA device to which the command is addressed
1734 * @cmd: SCSI command to execute
1735 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1737 * Our ->queuecommand() function has decided that the SCSI
1738 * command issued can be directly translated into an ATA
1739 * command, rather than handled internally.
1741 * This function sets up an ata_queued_cmd structure for the
1742 * SCSI command, and sends that ata_queued_cmd to the hardware.
1744 * The xlat_func argument (actor) returns 0 if ready to execute
1745 * ATA command, else 1 to finish translation. If 1 is returned
1746 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1747 * to be set reflecting an error condition or clean (early)
1751 * spin_lock_irqsave(host lock)
1754 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1755 * needs to be deferred.
1757 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1758 ata_xlat_func_t xlat_func)
1760 struct ata_port *ap = dev->link->ap;
1761 struct ata_queued_cmd *qc;
1766 qc = ata_scsi_qc_new(dev, cmd);
1770 /* data is present; dma-map it */
1771 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1772 cmd->sc_data_direction == DMA_TO_DEVICE) {
1773 if (unlikely(scsi_bufflen(cmd) < 1)) {
1774 ata_dev_printk(dev, KERN_WARNING,
1775 "WARNING: zero len r/w req\n");
1779 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1781 qc->dma_dir = cmd->sc_data_direction;
1784 qc->complete_fn = ata_scsi_qc_complete;
1789 if (ap->ops->qc_defer) {
1790 if ((rc = ap->ops->qc_defer(qc)))
1794 /* select device, send command to hardware */
1802 cmd->scsi_done(cmd);
1803 DPRINTK("EXIT - early finish (good or error)\n");
1808 cmd->result = (DID_ERROR << 16);
1809 cmd->scsi_done(cmd);
1811 DPRINTK("EXIT - internal\n");
1816 DPRINTK("EXIT - defer\n");
1817 if (rc == ATA_DEFER_LINK)
1818 return SCSI_MLQUEUE_DEVICE_BUSY;
1820 return SCSI_MLQUEUE_HOST_BUSY;
1824 * ata_scsi_rbuf_get - Map response buffer.
1825 * @cmd: SCSI command containing buffer to be mapped.
1826 * @flags: unsigned long variable to store irq enable status
1827 * @copy_in: copy in from user buffer
1829 * Prepare buffer for simulated SCSI commands.
1832 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1835 * Pointer to response buffer.
1837 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1838 unsigned long *flags)
1840 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1842 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1844 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1845 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1846 return ata_scsi_rbuf;
1850 * ata_scsi_rbuf_put - Unmap response buffer.
1851 * @cmd: SCSI command containing buffer to be unmapped.
1852 * @copy_out: copy out result
1853 * @flags: @flags passed to ata_scsi_rbuf_get()
1855 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1856 * @copy_back is true.
1859 * Unlocks ata_scsi_rbuf_lock.
1861 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1862 unsigned long *flags)
1865 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1866 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1867 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1871 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1872 * @args: device IDENTIFY data / SCSI command of interest.
1873 * @actor: Callback hook for desired SCSI command simulator
1875 * Takes care of the hard work of simulating a SCSI command...
1876 * Mapping the response buffer, calling the command's handler,
1877 * and handling the handler's return value. This return value
1878 * indicates whether the handler wishes the SCSI command to be
1879 * completed successfully (0), or not (in which case cmd->result
1880 * and sense buffer are assumed to be set).
1883 * spin_lock_irqsave(host lock)
1885 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1886 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1890 struct scsi_cmnd *cmd = args->cmd;
1891 unsigned long flags;
1893 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1894 rc = actor(args, rbuf);
1895 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
1898 cmd->result = SAM_STAT_GOOD;
1903 * ata_scsiop_inq_std - Simulate INQUIRY command
1904 * @args: device IDENTIFY data / SCSI command of interest.
1905 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1907 * Returns standard device identification data associated
1908 * with non-VPD INQUIRY command output.
1911 * spin_lock_irqsave(host lock)
1913 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1915 const u8 versions[] = {
1916 0x60, /* SAM-3 (no version claimed) */
1919 0x20, /* SBC-2 (no version claimed) */
1922 0x60 /* SPC-3 (no version claimed) */
1927 0x5, /* claim SPC-3 version compatibility */
1934 /* set scsi removeable (RMB) bit per ata bit */
1935 if (ata_id_removeable(args->id))
1938 memcpy(rbuf, hdr, sizeof(hdr));
1939 memcpy(&rbuf[8], "ATA ", 8);
1940 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1941 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1943 if (rbuf[32] == 0 || rbuf[32] == ' ')
1944 memcpy(&rbuf[32], "n/a ", 4);
1946 memcpy(rbuf + 59, versions, sizeof(versions));
1952 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1953 * @args: device IDENTIFY data / SCSI command of interest.
1954 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1956 * Returns list of inquiry VPD pages available.
1959 * spin_lock_irqsave(host lock)
1961 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1963 const u8 pages[] = {
1964 0x00, /* page 0x00, this page */
1965 0x80, /* page 0x80, unit serial no page */
1966 0x83, /* page 0x83, device ident page */
1967 0x89, /* page 0x89, ata info page */
1968 0xb0, /* page 0xb0, block limits page */
1969 0xb1, /* page 0xb1, block device characteristics page */
1970 0xb2, /* page 0xb2, thin provisioning page */
1973 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1974 memcpy(rbuf + 4, pages, sizeof(pages));
1979 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
1980 * @args: device IDENTIFY data / SCSI command of interest.
1981 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1983 * Returns ATA device serial number.
1986 * spin_lock_irqsave(host lock)
1988 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
1992 0x80, /* this page code */
1994 ATA_ID_SERNO_LEN, /* page len */
1997 memcpy(rbuf, hdr, sizeof(hdr));
1998 ata_id_string(args->id, (unsigned char *) &rbuf[4],
1999 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2004 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2005 * @args: device IDENTIFY data / SCSI command of interest.
2006 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2008 * Yields two logical unit device identification designators:
2009 * - vendor specific ASCII containing the ATA serial number
2010 * - SAT defined "t10 vendor id based" containing ASCII vendor
2011 * name ("ATA "), model and serial numbers.
2014 * spin_lock_irqsave(host lock)
2016 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2018 const int sat_model_serial_desc_len = 68;
2021 rbuf[1] = 0x83; /* this page code */
2024 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2026 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2028 ata_id_string(args->id, (unsigned char *) rbuf + num,
2029 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2030 num += ATA_ID_SERNO_LEN;
2032 /* SAT defined lu model and serial numbers descriptor */
2033 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2036 rbuf[num + 3] = sat_model_serial_desc_len;
2038 memcpy(rbuf + num, "ATA ", 8);
2040 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2042 num += ATA_ID_PROD_LEN;
2043 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2045 num += ATA_ID_SERNO_LEN;
2047 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2052 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2053 * @args: device IDENTIFY data / SCSI command of interest.
2054 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2056 * Yields SAT-specified ATA VPD page.
2059 * spin_lock_irqsave(host lock)
2061 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2063 struct ata_taskfile tf;
2065 memset(&tf, 0, sizeof(tf));
2067 rbuf[1] = 0x89; /* our page code */
2068 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2069 rbuf[3] = (0x238 & 0xff);
2071 memcpy(&rbuf[8], "linux ", 8);
2072 memcpy(&rbuf[16], "libata ", 16);
2073 memcpy(&rbuf[32], DRV_VERSION, 4);
2074 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2076 /* we don't store the ATA device signature, so we fake it */
2078 tf.command = ATA_DRDY; /* really, this is Status reg */
2082 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2083 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2085 rbuf[56] = ATA_CMD_ID_ATA;
2087 memcpy(&rbuf[60], &args->id[0], 512);
2091 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2096 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2099 * Optimal transfer length granularity.
2101 * This is always one physical block, but for disks with a smaller
2102 * logical than physical sector size we need to figure out what the
2105 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2106 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2109 * Optimal unmap granularity.
2111 * The ATA spec doesn't even know about a granularity or alignment
2112 * for the TRIM command. We can leave away most of the unmap related
2113 * VPD page entries, but we have specifify a granularity to signal
2114 * that we support some form of unmap - in thise case via WRITE SAME
2115 * with the unmap bit set.
2117 if (ata_id_has_trim(args->id)) {
2118 put_unaligned_be32(65535 * 512 / 8, &rbuf[20]);
2119 put_unaligned_be32(1, &rbuf[28]);
2125 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2127 int form_factor = ata_id_form_factor(args->id);
2128 int media_rotation_rate = ata_id_rotation_rate(args->id);
2132 rbuf[4] = media_rotation_rate >> 8;
2133 rbuf[5] = media_rotation_rate;
2134 rbuf[7] = form_factor;
2139 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2141 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2144 rbuf[5] = 1 << 6; /* TPWS */
2150 * ata_scsiop_noop - Command handler that simply returns success.
2151 * @args: device IDENTIFY data / SCSI command of interest.
2152 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2154 * No operation. Simply returns success to caller, to indicate
2155 * that the caller should successfully complete this SCSI command.
2158 * spin_lock_irqsave(host lock)
2160 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
2167 * ata_msense_caching - Simulate MODE SENSE caching info page
2168 * @id: device IDENTIFY data
2169 * @buf: output buffer
2171 * Generate a caching info page, which conditionally indicates
2172 * write caching to the SCSI layer, depending on device
2178 static unsigned int ata_msense_caching(u16 *id, u8 *buf)
2180 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
2181 if (ata_id_wcache_enabled(id))
2182 buf[2] |= (1 << 2); /* write cache enable */
2183 if (!ata_id_rahead_enabled(id))
2184 buf[12] |= (1 << 5); /* disable read ahead */
2185 return sizeof(def_cache_mpage);
2189 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2190 * @buf: output buffer
2192 * Generate a generic MODE SENSE control mode page.
2197 static unsigned int ata_msense_ctl_mode(u8 *buf)
2199 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
2200 return sizeof(def_control_mpage);
2204 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2205 * @buf: output buffer
2207 * Generate a generic MODE SENSE r/w error recovery page.
2212 static unsigned int ata_msense_rw_recovery(u8 *buf)
2214 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
2215 return sizeof(def_rw_recovery_mpage);
2219 * We can turn this into a real blacklist if it's needed, for now just
2220 * blacklist any Maxtor BANC1G10 revision firmware
2222 static int ata_dev_supports_fua(u16 *id)
2224 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2228 if (!ata_id_has_fua(id))
2231 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2232 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2234 if (strcmp(model, "Maxtor"))
2236 if (strcmp(fw, "BANC1G10"))
2239 return 0; /* blacklisted */
2243 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2244 * @args: device IDENTIFY data / SCSI command of interest.
2245 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2247 * Simulate MODE SENSE commands. Assume this is invoked for direct
2248 * access devices (e.g. disks) only. There should be no block
2249 * descriptor for other device types.
2252 * spin_lock_irqsave(host lock)
2254 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2256 struct ata_device *dev = args->dev;
2257 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2258 const u8 sat_blk_desc[] = {
2259 0, 0, 0, 0, /* number of blocks: sat unspecified */
2261 0, 0x2, 0x0 /* block length: 512 bytes */
2264 unsigned int ebd, page_control, six_byte;
2269 six_byte = (scsicmd[0] == MODE_SENSE);
2270 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2272 * LLBA bit in msense(10) ignored (compliant)
2275 page_control = scsicmd[2] >> 6;
2276 switch (page_control) {
2277 case 0: /* current */
2278 break; /* supported */
2280 goto saving_not_supp;
2281 case 1: /* changeable */
2282 case 2: /* defaults */
2288 p += 4 + (ebd ? 8 : 0);
2290 p += 8 + (ebd ? 8 : 0);
2292 pg = scsicmd[2] & 0x3f;
2295 * No mode subpages supported (yet) but asking for _all_
2296 * subpages may be valid
2298 if (spg && (spg != ALL_SUB_MPAGES))
2302 case RW_RECOVERY_MPAGE:
2303 p += ata_msense_rw_recovery(p);
2307 p += ata_msense_caching(args->id, p);
2311 p += ata_msense_ctl_mode(p);
2315 p += ata_msense_rw_recovery(p);
2316 p += ata_msense_caching(args->id, p);
2317 p += ata_msense_ctl_mode(p);
2320 default: /* invalid page code */
2325 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2326 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2330 rbuf[0] = p - rbuf - 1;
2333 rbuf[3] = sizeof(sat_blk_desc);
2334 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2337 unsigned int output_len = p - rbuf - 2;
2339 rbuf[0] = output_len >> 8;
2340 rbuf[1] = output_len;
2343 rbuf[7] = sizeof(sat_blk_desc);
2344 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2350 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2351 /* "Invalid field in cbd" */
2355 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2356 /* "Saving parameters not supported" */
2361 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2362 * @args: device IDENTIFY data / SCSI command of interest.
2363 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2365 * Simulate READ CAPACITY commands.
2370 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2372 struct ata_device *dev = args->dev;
2373 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2374 u32 sector_size; /* physical sector size in bytes */
2378 sector_size = ata_id_logical_sector_size(dev->id);
2379 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2380 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2384 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2385 if (last_lba >= 0xffffffffULL)
2386 last_lba = 0xffffffff;
2388 /* sector count, 32-bit */
2389 rbuf[0] = last_lba >> (8 * 3);
2390 rbuf[1] = last_lba >> (8 * 2);
2391 rbuf[2] = last_lba >> (8 * 1);
2395 rbuf[4] = sector_size >> (8 * 3);
2396 rbuf[5] = sector_size >> (8 * 2);
2397 rbuf[6] = sector_size >> (8 * 1);
2398 rbuf[7] = sector_size;
2400 /* sector count, 64-bit */
2401 rbuf[0] = last_lba >> (8 * 7);
2402 rbuf[1] = last_lba >> (8 * 6);
2403 rbuf[2] = last_lba >> (8 * 5);
2404 rbuf[3] = last_lba >> (8 * 4);
2405 rbuf[4] = last_lba >> (8 * 3);
2406 rbuf[5] = last_lba >> (8 * 2);
2407 rbuf[6] = last_lba >> (8 * 1);
2411 rbuf[ 8] = sector_size >> (8 * 3);
2412 rbuf[ 9] = sector_size >> (8 * 2);
2413 rbuf[10] = sector_size >> (8 * 1);
2414 rbuf[11] = sector_size;
2417 rbuf[13] = log2_per_phys;
2418 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2419 rbuf[15] = lowest_aligned;
2421 if (ata_id_has_trim(args->id)) {
2422 rbuf[14] |= 0x80; /* TPE */
2424 if (ata_id_has_zero_after_trim(args->id))
2425 rbuf[14] |= 0x40; /* TPRZ */
2433 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2434 * @args: device IDENTIFY data / SCSI command of interest.
2435 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2437 * Simulate REPORT LUNS command.
2440 * spin_lock_irqsave(host lock)
2442 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2445 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2450 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2452 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2453 /* FIXME: not quite right; we don't want the
2454 * translation of taskfile registers into
2455 * a sense descriptors, since that's only
2456 * correct for ATA, not ATAPI
2458 ata_gen_passthru_sense(qc);
2461 qc->scsidone(qc->scsicmd);
2465 /* is it pointless to prefer PIO for "safety reasons"? */
2466 static inline int ata_pio_use_silly(struct ata_port *ap)
2468 return (ap->flags & ATA_FLAG_PIO_DMA);
2471 static void atapi_request_sense(struct ata_queued_cmd *qc)
2473 struct ata_port *ap = qc->ap;
2474 struct scsi_cmnd *cmd = qc->scsicmd;
2476 DPRINTK("ATAPI request sense\n");
2478 /* FIXME: is this needed? */
2479 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2481 #ifdef CONFIG_ATA_SFF
2482 if (ap->ops->sff_tf_read)
2483 ap->ops->sff_tf_read(ap, &qc->tf);
2486 /* fill these in, for the case where they are -not- overwritten */
2487 cmd->sense_buffer[0] = 0x70;
2488 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2492 /* setup sg table and init transfer direction */
2493 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2494 ata_sg_init(qc, &qc->sgent, 1);
2495 qc->dma_dir = DMA_FROM_DEVICE;
2497 memset(&qc->cdb, 0, qc->dev->cdb_len);
2498 qc->cdb[0] = REQUEST_SENSE;
2499 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2501 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2502 qc->tf.command = ATA_CMD_PACKET;
2504 if (ata_pio_use_silly(ap)) {
2505 qc->tf.protocol = ATAPI_PROT_DMA;
2506 qc->tf.feature |= ATAPI_PKT_DMA;
2508 qc->tf.protocol = ATAPI_PROT_PIO;
2509 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2512 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2514 qc->complete_fn = atapi_sense_complete;
2521 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2523 struct scsi_cmnd *cmd = qc->scsicmd;
2524 unsigned int err_mask = qc->err_mask;
2526 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2528 /* handle completion from new EH */
2529 if (unlikely(qc->ap->ops->error_handler &&
2530 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2532 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2533 /* FIXME: not quite right; we don't want the
2534 * translation of taskfile registers into a
2535 * sense descriptors, since that's only
2536 * correct for ATA, not ATAPI
2538 ata_gen_passthru_sense(qc);
2541 /* SCSI EH automatically locks door if sdev->locked is
2542 * set. Sometimes door lock request continues to
2543 * fail, for example, when no media is present. This
2544 * creates a loop - SCSI EH issues door lock which
2545 * fails and gets invoked again to acquire sense data
2546 * for the failed command.
2548 * If door lock fails, always clear sdev->locked to
2549 * avoid this infinite loop.
2551 * This may happen before SCSI scan is complete. Make
2552 * sure qc->dev->sdev isn't NULL before dereferencing.
2554 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2555 qc->dev->sdev->locked = 0;
2557 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2563 /* successful completion or old EH failure path */
2564 if (unlikely(err_mask & AC_ERR_DEV)) {
2565 cmd->result = SAM_STAT_CHECK_CONDITION;
2566 atapi_request_sense(qc);
2568 } else if (unlikely(err_mask)) {
2569 /* FIXME: not quite right; we don't want the
2570 * translation of taskfile registers into
2571 * a sense descriptors, since that's only
2572 * correct for ATA, not ATAPI
2574 ata_gen_passthru_sense(qc);
2576 u8 *scsicmd = cmd->cmnd;
2578 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2579 unsigned long flags;
2582 buf = ata_scsi_rbuf_get(cmd, true, &flags);
2584 /* ATAPI devices typically report zero for their SCSI version,
2585 * and sometimes deviate from the spec WRT response data
2586 * format. If SCSI version is reported as zero like normal,
2587 * then we make the following fixups: 1) Fake MMC-5 version,
2588 * to indicate to the Linux scsi midlayer this is a modern
2589 * device. 2) Ensure response data format / ATAPI information
2590 * are always correct.
2597 ata_scsi_rbuf_put(cmd, true, &flags);
2600 cmd->result = SAM_STAT_GOOD;
2607 * atapi_xlat - Initialize PACKET taskfile
2608 * @qc: command structure to be initialized
2611 * spin_lock_irqsave(host lock)
2614 * Zero on success, non-zero on failure.
2616 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2618 struct scsi_cmnd *scmd = qc->scsicmd;
2619 struct ata_device *dev = qc->dev;
2620 int nodata = (scmd->sc_data_direction == DMA_NONE);
2621 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2622 unsigned int nbytes;
2624 memset(qc->cdb, 0, dev->cdb_len);
2625 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2627 qc->complete_fn = atapi_qc_complete;
2629 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2630 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2631 qc->tf.flags |= ATA_TFLAG_WRITE;
2632 DPRINTK("direction: write\n");
2635 qc->tf.command = ATA_CMD_PACKET;
2636 ata_qc_set_pc_nbytes(qc);
2638 /* check whether ATAPI DMA is safe */
2639 if (!nodata && !using_pio && atapi_check_dma(qc))
2642 /* Some controller variants snoop this value for Packet
2643 * transfers to do state machine and FIFO management. Thus we
2644 * want to set it properly, and for DMA where it is
2645 * effectively meaningless.
2647 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2649 /* Most ATAPI devices which honor transfer chunk size don't
2650 * behave according to the spec when odd chunk size which
2651 * matches the transfer length is specified. If the number of
2652 * bytes to transfer is 2n+1. According to the spec, what
2653 * should happen is to indicate that 2n+1 is going to be
2654 * transferred and transfer 2n+2 bytes where the last byte is
2657 * In practice, this doesn't happen. ATAPI devices first
2658 * indicate and transfer 2n bytes and then indicate and
2659 * transfer 2 bytes where the last byte is padding.
2661 * This inconsistency confuses several controllers which
2662 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2663 * These controllers use actual number of transferred bytes to
2664 * update DMA poitner and transfer of 4n+2 bytes make those
2665 * controller push DMA pointer by 4n+4 bytes because SATA data
2666 * FISes are aligned to 4 bytes. This causes data corruption
2667 * and buffer overrun.
2669 * Always setting nbytes to even number solves this problem
2670 * because then ATAPI devices don't have to split data at 2n
2676 qc->tf.lbam = (nbytes & 0xFF);
2677 qc->tf.lbah = (nbytes >> 8);
2680 qc->tf.protocol = ATAPI_PROT_NODATA;
2682 qc->tf.protocol = ATAPI_PROT_PIO;
2685 qc->tf.protocol = ATAPI_PROT_DMA;
2686 qc->tf.feature |= ATAPI_PKT_DMA;
2688 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2689 (scmd->sc_data_direction != DMA_TO_DEVICE))
2690 /* some SATA bridges need us to indicate data xfer direction */
2691 qc->tf.feature |= ATAPI_DMADIR;
2695 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2696 as ATAPI tape drives don't get this right otherwise */
2700 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2702 if (!sata_pmp_attached(ap)) {
2703 if (likely(devno < ata_link_max_devices(&ap->link)))
2704 return &ap->link.device[devno];
2706 if (likely(devno < ap->nr_pmp_links))
2707 return &ap->pmp_link[devno].device[0];
2713 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2714 const struct scsi_device *scsidev)
2718 /* skip commands not addressed to targets we simulate */
2719 if (!sata_pmp_attached(ap)) {
2720 if (unlikely(scsidev->channel || scsidev->lun))
2722 devno = scsidev->id;
2724 if (unlikely(scsidev->id || scsidev->lun))
2726 devno = scsidev->channel;
2729 return ata_find_dev(ap, devno);
2733 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2734 * @ap: ATA port to which the device is attached
2735 * @scsidev: SCSI device from which we derive the ATA device
2737 * Given various information provided in struct scsi_cmnd,
2738 * map that onto an ATA bus, and using that mapping
2739 * determine which ata_device is associated with the
2740 * SCSI command to be sent.
2743 * spin_lock_irqsave(host lock)
2746 * Associated ATA device, or %NULL if not found.
2748 static struct ata_device *
2749 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2751 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2753 if (unlikely(!dev || !ata_dev_enabled(dev)))
2760 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2761 * @byte1: Byte 1 from pass-thru CDB.
2764 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2767 ata_scsi_map_proto(u8 byte1)
2769 switch((byte1 & 0x1e) >> 1) {
2770 case 3: /* Non-data */
2771 return ATA_PROT_NODATA;
2774 case 10: /* UDMA Data-in */
2775 case 11: /* UDMA Data-Out */
2776 return ATA_PROT_DMA;
2778 case 4: /* PIO Data-in */
2779 case 5: /* PIO Data-out */
2780 return ATA_PROT_PIO;
2782 case 0: /* Hard Reset */
2784 case 8: /* Device Diagnostic */
2785 case 9: /* Device Reset */
2786 case 7: /* DMA Queued */
2787 case 12: /* FPDMA */
2788 case 15: /* Return Response Info */
2789 default: /* Reserved */
2793 return ATA_PROT_UNKNOWN;
2797 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2798 * @qc: command structure to be initialized
2800 * Handles either 12 or 16-byte versions of the CDB.
2803 * Zero on success, non-zero on failure.
2805 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2807 struct ata_taskfile *tf = &(qc->tf);
2808 struct scsi_cmnd *scmd = qc->scsicmd;
2809 struct ata_device *dev = qc->dev;
2810 const u8 *cdb = scmd->cmnd;
2812 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2816 * 12 and 16 byte CDBs use different offsets to
2817 * provide the various register values.
2819 if (cdb[0] == ATA_16) {
2821 * 16-byte CDB - may contain extended commands.
2823 * If that is the case, copy the upper byte register values.
2825 if (cdb[1] & 0x01) {
2826 tf->hob_feature = cdb[3];
2827 tf->hob_nsect = cdb[5];
2828 tf->hob_lbal = cdb[7];
2829 tf->hob_lbam = cdb[9];
2830 tf->hob_lbah = cdb[11];
2831 tf->flags |= ATA_TFLAG_LBA48;
2833 tf->flags &= ~ATA_TFLAG_LBA48;
2836 * Always copy low byte, device and command registers.
2838 tf->feature = cdb[4];
2843 tf->device = cdb[13];
2844 tf->command = cdb[14];
2847 * 12-byte CDB - incapable of extended commands.
2849 tf->flags &= ~ATA_TFLAG_LBA48;
2851 tf->feature = cdb[3];
2856 tf->device = cdb[8];
2857 tf->command = cdb[9];
2860 /* enforce correct master/slave bit */
2861 tf->device = dev->devno ?
2862 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2864 switch (tf->command) {
2865 /* READ/WRITE LONG use a non-standard sect_size */
2866 case ATA_CMD_READ_LONG:
2867 case ATA_CMD_READ_LONG_ONCE:
2868 case ATA_CMD_WRITE_LONG:
2869 case ATA_CMD_WRITE_LONG_ONCE:
2870 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2872 qc->sect_size = scsi_bufflen(scmd);
2875 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2876 case ATA_CMD_CFA_WRITE_NE:
2877 case ATA_CMD_CFA_TRANS_SECT:
2878 case ATA_CMD_CFA_WRITE_MULT_NE:
2879 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2881 case ATA_CMD_READ_EXT:
2882 case ATA_CMD_READ_QUEUED:
2883 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2884 case ATA_CMD_FPDMA_READ:
2885 case ATA_CMD_READ_MULTI:
2886 case ATA_CMD_READ_MULTI_EXT:
2887 case ATA_CMD_PIO_READ:
2888 case ATA_CMD_PIO_READ_EXT:
2889 case ATA_CMD_READ_STREAM_DMA_EXT:
2890 case ATA_CMD_READ_STREAM_EXT:
2891 case ATA_CMD_VERIFY:
2892 case ATA_CMD_VERIFY_EXT:
2894 case ATA_CMD_WRITE_EXT:
2895 case ATA_CMD_WRITE_FUA_EXT:
2896 case ATA_CMD_WRITE_QUEUED:
2897 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
2898 case ATA_CMD_FPDMA_WRITE:
2899 case ATA_CMD_WRITE_MULTI:
2900 case ATA_CMD_WRITE_MULTI_EXT:
2901 case ATA_CMD_WRITE_MULTI_FUA_EXT:
2902 case ATA_CMD_PIO_WRITE:
2903 case ATA_CMD_PIO_WRITE_EXT:
2904 case ATA_CMD_WRITE_STREAM_DMA_EXT:
2905 case ATA_CMD_WRITE_STREAM_EXT:
2906 qc->sect_size = scmd->device->sector_size;
2909 /* Everything else uses 512 byte "sectors" */
2911 qc->sect_size = ATA_SECT_SIZE;
2915 * Set flags so that all registers will be written, pass on
2916 * write indication (used for PIO/DMA setup), result TF is
2917 * copied back and we don't whine too much about its failure.
2919 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2920 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2921 tf->flags |= ATA_TFLAG_WRITE;
2923 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2926 * Set transfer length.
2928 * TODO: find out if we need to do more here to
2929 * cover scatter/gather case.
2931 ata_qc_set_pc_nbytes(qc);
2933 /* We may not issue DMA commands if no DMA mode is set */
2934 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2937 /* sanity check for pio multi commands */
2938 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2941 if (is_multi_taskfile(tf)) {
2942 unsigned int multi_count = 1 << (cdb[1] >> 5);
2944 /* compare the passed through multi_count
2945 * with the cached multi_count of libata
2947 if (multi_count != dev->multi_count)
2948 ata_dev_printk(dev, KERN_WARNING,
2949 "invalid multi_count %u ignored\n",
2954 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2955 * SET_FEATURES - XFER MODE must be preceded/succeeded
2956 * by an update to hardware-specific registers for each
2957 * controller (i.e. the reason for ->set_piomode(),
2958 * ->set_dmamode(), and ->post_set_mode() hooks).
2960 if (tf->command == ATA_CMD_SET_FEATURES &&
2961 tf->feature == SETFEATURES_XFER)
2965 * Filter TPM commands by default. These provide an
2966 * essentially uncontrolled encrypted "back door" between
2967 * applications and the disk. Set libata.allow_tpm=1 if you
2968 * have a real reason for wanting to use them. This ensures
2969 * that installed software cannot easily mess stuff up without
2970 * user intent. DVR type users will probably ship with this enabled
2971 * for movie content management.
2973 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2974 * for this and should do in future but that it is not sufficient as
2975 * DCS is an optional feature set. Thus we also do the software filter
2976 * so that we comply with the TC consortium stated goal that the user
2977 * can turn off TC features of their system.
2979 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
2985 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
2986 /* "Invalid field in cdb" */
2990 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
2992 struct ata_taskfile *tf = &qc->tf;
2993 struct scsi_cmnd *scmd = qc->scsicmd;
2994 struct ata_device *dev = qc->dev;
2995 const u8 *cdb = scmd->cmnd;
3001 /* we may not issue DMA commands if no DMA mode is set */
3002 if (unlikely(!dev->dma_mode))
3005 if (unlikely(scmd->cmd_len < 16))
3007 scsi_16_lba_len(cdb, &block, &n_block);
3009 /* for now we only support WRITE SAME with the unmap bit set */
3010 if (unlikely(!(cdb[1] & 0x8)))
3014 * WRITE SAME always has a sector sized buffer as payload, this
3015 * should never be a multiple entry S/G list.
3017 if (!scsi_sg_count(scmd))
3020 buf = page_address(sg_page(scsi_sglist(scmd)));
3021 size = ata_set_lba_range_entries(buf, 512, block, n_block);
3023 tf->protocol = ATA_PROT_DMA;
3024 tf->hob_feature = 0;
3025 tf->feature = ATA_DSM_TRIM;
3026 tf->hob_nsect = (size / 512) >> 8;
3027 tf->nsect = size / 512;
3028 tf->command = ATA_CMD_DSM;
3029 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3032 ata_qc_set_pc_nbytes(qc);
3037 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3038 /* "Invalid field in cdb" */
3043 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3045 * @cmd: SCSI command opcode to consider
3047 * Look up the SCSI command given, and determine whether the
3048 * SCSI command is to be translated or simulated.
3051 * Pointer to translation function if possible, %NULL if not.
3054 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3064 return ata_scsi_rw_xlat;
3067 return ata_scsi_write_same_xlat;
3069 case SYNCHRONIZE_CACHE:
3070 if (ata_try_flush_cache(dev))
3071 return ata_scsi_flush_xlat;
3076 return ata_scsi_verify_xlat;
3080 return ata_scsi_pass_thru;
3083 return ata_scsi_start_stop_xlat;
3090 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3091 * @ap: ATA port to which the command was being sent
3092 * @cmd: SCSI command to dump
3094 * Prints the contents of a SCSI command via printk().
3097 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3098 struct scsi_cmnd *cmd)
3101 struct scsi_device *scsidev = cmd->device;
3102 u8 *scsicmd = cmd->cmnd;
3104 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
3106 scsidev->channel, scsidev->id, scsidev->lun,
3107 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3108 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3113 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
3114 struct ata_device *dev)
3116 u8 scsi_op = scmd->cmnd[0];
3117 ata_xlat_func_t xlat_func;
3120 if (dev->class == ATA_DEV_ATA) {
3121 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3124 xlat_func = ata_get_xlat_func(dev, scsi_op);
3126 if (unlikely(!scmd->cmd_len))
3130 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3131 /* relay SCSI command to ATAPI device */
3132 int len = COMMAND_SIZE(scsi_op);
3133 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
3136 xlat_func = atapi_xlat;
3138 /* ATA_16 passthru, treat as an ATA command */
3139 if (unlikely(scmd->cmd_len > 16))
3142 xlat_func = ata_get_xlat_func(dev, scsi_op);
3147 rc = ata_scsi_translate(dev, scmd, xlat_func);
3149 ata_scsi_simulate(dev, scmd);
3154 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3155 scmd->cmd_len, scsi_op, dev->cdb_len);
3156 scmd->result = DID_ERROR << 16;
3157 scmd->scsi_done(scmd);
3162 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3163 * @shost: SCSI host of command to be sent
3164 * @cmd: SCSI command to be sent
3166 * In some cases, this function translates SCSI commands into
3167 * ATA taskfiles, and queues the taskfiles to be sent to
3168 * hardware. In other cases, this function simulates a
3169 * SCSI device by evaluating and responding to certain
3170 * SCSI commands. This creates the overall effect of
3171 * ATA and ATAPI devices appearing as SCSI devices.
3177 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3180 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
3182 struct ata_port *ap;
3183 struct ata_device *dev;
3184 struct scsi_device *scsidev = cmd->device;
3186 unsigned long irq_flags;
3188 ap = ata_shost_to_port(shost);
3190 spin_lock_irqsave(ap->lock, irq_flags);
3192 ata_scsi_dump_cdb(ap, cmd);
3194 dev = ata_scsi_find_dev(ap, scsidev);
3196 rc = __ata_scsi_queuecmd(cmd, dev);
3198 cmd->result = (DID_BAD_TARGET << 16);
3199 cmd->scsi_done(cmd);
3202 spin_unlock_irqrestore(ap->lock, irq_flags);
3208 * ata_scsi_simulate - simulate SCSI command on ATA device
3209 * @dev: the target device
3210 * @cmd: SCSI command being sent to device.
3212 * Interprets and directly executes a select list of SCSI commands
3213 * that can be handled internally.
3216 * spin_lock_irqsave(host lock)
3219 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
3221 struct ata_scsi_args args;
3222 const u8 *scsicmd = cmd->cmnd;
3228 args.done = cmd->scsi_done;
3230 switch(scsicmd[0]) {
3231 /* TODO: worth improving? */
3233 ata_scsi_invalid_field(cmd);
3237 if (scsicmd[1] & 2) /* is CmdDt set? */
3238 ata_scsi_invalid_field(cmd);
3239 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3240 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3241 else switch (scsicmd[2]) {
3243 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
3246 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
3249 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
3252 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3255 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3258 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3261 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
3264 ata_scsi_invalid_field(cmd);
3271 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3274 case MODE_SELECT: /* unconditionally return */
3275 case MODE_SELECT_10: /* bad-field-in-cdb */
3276 ata_scsi_invalid_field(cmd);
3280 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3283 case SERVICE_ACTION_IN:
3284 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3285 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3287 ata_scsi_invalid_field(cmd);
3291 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3295 ata_scsi_set_sense(cmd, 0, 0, 0);
3296 cmd->result = (DRIVER_SENSE << 24);
3297 cmd->scsi_done(cmd);
3300 /* if we reach this, then writeback caching is disabled,
3301 * turning this into a no-op.
3303 case SYNCHRONIZE_CACHE:
3306 /* no-op's, complete with success */
3310 case TEST_UNIT_READY:
3311 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3314 case SEND_DIAGNOSTIC:
3315 tmp8 = scsicmd[1] & ~(1 << 3);
3316 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3317 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3319 ata_scsi_invalid_field(cmd);
3322 /* all other commands */
3324 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3325 /* "Invalid command operation code" */
3326 cmd->scsi_done(cmd);
3331 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3335 for (i = 0; i < host->n_ports; i++) {
3336 struct ata_port *ap = host->ports[i];
3337 struct Scsi_Host *shost;
3340 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3344 *(struct ata_port **)&shost->hostdata[0] = ap;
3345 ap->scsi_host = shost;
3347 shost->transportt = ata_scsi_transport_template;
3348 shost->unique_id = ap->print_id;
3351 shost->max_channel = 1;
3352 shost->max_cmd_len = 16;
3354 /* Schedule policy is determined by ->qc_defer()
3355 * callback and it needs to see every deferred qc.
3356 * Set host_blocked to 1 to prevent SCSI midlayer from
3357 * automatically deferring requests.
3359 shost->max_host_blocked = 1;
3361 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3369 scsi_host_put(host->ports[i]->scsi_host);
3372 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3374 scsi_remove_host(shost);
3375 scsi_host_put(shost);
3380 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3383 struct ata_device *last_failed_dev = NULL;
3384 struct ata_link *link;
3385 struct ata_device *dev;
3388 ata_for_each_link(link, ap, EDGE) {
3389 ata_for_each_dev(dev, link, ENABLED) {
3390 struct scsi_device *sdev;
3391 int channel = 0, id = 0;
3396 if (ata_is_host_link(link))
3399 channel = link->pmp;
3401 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3403 if (!IS_ERR(sdev)) {
3405 scsi_device_put(sdev);
3412 /* If we scanned while EH was in progress or allocation
3413 * failure occurred, scan would have failed silently. Check
3414 * whether all devices are attached.
3416 ata_for_each_link(link, ap, EDGE) {
3417 ata_for_each_dev(dev, link, ENABLED) {
3426 /* we're missing some SCSI devices */
3428 /* If caller requested synchrnous scan && we've made
3429 * any progress, sleep briefly and repeat.
3431 if (dev != last_failed_dev) {
3433 last_failed_dev = dev;
3437 /* We might be failing to detect boot device, give it
3438 * a few more chances.
3445 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3446 "failed without making any progress,\n"
3447 " switching to async\n");
3450 queue_delayed_work(system_long_wq, &ap->hotplug_task,
3451 round_jiffies_relative(HZ));
3455 * ata_scsi_offline_dev - offline attached SCSI device
3456 * @dev: ATA device to offline attached SCSI device for
3458 * This function is called from ata_eh_hotplug() and responsible
3459 * for taking the SCSI device attached to @dev offline. This
3460 * function is called with host lock which protects dev->sdev
3464 * spin_lock_irqsave(host lock)
3467 * 1 if attached SCSI device exists, 0 otherwise.
3469 int ata_scsi_offline_dev(struct ata_device *dev)
3472 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3479 * ata_scsi_remove_dev - remove attached SCSI device
3480 * @dev: ATA device to remove attached SCSI device for
3482 * This function is called from ata_eh_scsi_hotplug() and
3483 * responsible for removing the SCSI device attached to @dev.
3486 * Kernel thread context (may sleep).
3488 static void ata_scsi_remove_dev(struct ata_device *dev)
3490 struct ata_port *ap = dev->link->ap;
3491 struct scsi_device *sdev;
3492 unsigned long flags;
3494 /* Alas, we need to grab scan_mutex to ensure SCSI device
3495 * state doesn't change underneath us and thus
3496 * scsi_device_get() always succeeds. The mutex locking can
3497 * be removed if there is __scsi_device_get() interface which
3498 * increments reference counts regardless of device state.
3500 mutex_lock(&ap->scsi_host->scan_mutex);
3501 spin_lock_irqsave(ap->lock, flags);
3503 /* clearing dev->sdev is protected by host lock */
3508 /* If user initiated unplug races with us, sdev can go
3509 * away underneath us after the host lock and
3510 * scan_mutex are released. Hold onto it.
3512 if (scsi_device_get(sdev) == 0) {
3513 /* The following ensures the attached sdev is
3514 * offline on return from ata_scsi_offline_dev()
3515 * regardless it wins or loses the race
3516 * against this function.
3518 scsi_device_set_state(sdev, SDEV_OFFLINE);
3525 spin_unlock_irqrestore(ap->lock, flags);
3526 mutex_unlock(&ap->scsi_host->scan_mutex);
3529 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3530 dev_name(&sdev->sdev_gendev));
3532 scsi_remove_device(sdev);
3533 scsi_device_put(sdev);
3537 static void ata_scsi_handle_link_detach(struct ata_link *link)
3539 struct ata_port *ap = link->ap;
3540 struct ata_device *dev;
3542 ata_for_each_dev(dev, link, ALL) {
3543 unsigned long flags;
3545 if (!(dev->flags & ATA_DFLAG_DETACHED))
3548 spin_lock_irqsave(ap->lock, flags);
3549 dev->flags &= ~ATA_DFLAG_DETACHED;
3550 spin_unlock_irqrestore(ap->lock, flags);
3552 ata_scsi_remove_dev(dev);
3557 * ata_scsi_media_change_notify - send media change event
3558 * @dev: Pointer to the disk device with media change event
3560 * Tell the block layer to send a media change notification
3564 * spin_lock_irqsave(host lock)
3566 void ata_scsi_media_change_notify(struct ata_device *dev)
3569 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3574 * ata_scsi_hotplug - SCSI part of hotplug
3575 * @work: Pointer to ATA port to perform SCSI hotplug on
3577 * Perform SCSI part of hotplug. It's executed from a separate
3578 * workqueue after EH completes. This is necessary because SCSI
3579 * hot plugging requires working EH and hot unplugging is
3580 * synchronized with hot plugging with a mutex.
3583 * Kernel thread context (may sleep).
3585 void ata_scsi_hotplug(struct work_struct *work)
3587 struct ata_port *ap =
3588 container_of(work, struct ata_port, hotplug_task.work);
3591 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3592 DPRINTK("ENTER/EXIT - unloading\n");
3597 mutex_lock(&ap->scsi_scan_mutex);
3599 /* Unplug detached devices. We cannot use link iterator here
3600 * because PMP links have to be scanned even if PMP is
3601 * currently not attached. Iterate manually.
3603 ata_scsi_handle_link_detach(&ap->link);
3605 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3606 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3608 /* scan for new ones */
3609 ata_scsi_scan_host(ap, 0);
3611 mutex_unlock(&ap->scsi_scan_mutex);
3616 * ata_scsi_user_scan - indication for user-initiated bus scan
3617 * @shost: SCSI host to scan
3618 * @channel: Channel to scan
3622 * This function is called when user explicitly requests bus
3623 * scan. Set probe pending flag and invoke EH.
3626 * SCSI layer (we don't care)
3631 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3632 unsigned int id, unsigned int lun)
3634 struct ata_port *ap = ata_shost_to_port(shost);
3635 unsigned long flags;
3638 if (!ap->ops->error_handler)
3641 if (lun != SCAN_WILD_CARD && lun)
3644 if (!sata_pmp_attached(ap)) {
3645 if (channel != SCAN_WILD_CARD && channel)
3649 if (id != SCAN_WILD_CARD && id)
3654 spin_lock_irqsave(ap->lock, flags);
3656 if (devno == SCAN_WILD_CARD) {
3657 struct ata_link *link;
3659 ata_for_each_link(link, ap, EDGE) {
3660 struct ata_eh_info *ehi = &link->eh_info;
3661 ehi->probe_mask |= ATA_ALL_DEVICES;
3662 ehi->action |= ATA_EH_RESET;
3665 struct ata_device *dev = ata_find_dev(ap, devno);
3668 struct ata_eh_info *ehi = &dev->link->eh_info;
3669 ehi->probe_mask |= 1 << dev->devno;
3670 ehi->action |= ATA_EH_RESET;
3676 ata_port_schedule_eh(ap);
3677 spin_unlock_irqrestore(ap->lock, flags);
3678 ata_port_wait_eh(ap);
3680 spin_unlock_irqrestore(ap->lock, flags);
3686 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3687 * @work: Pointer to ATA port to perform scsi_rescan_device()
3689 * After ATA pass thru (SAT) commands are executed successfully,
3690 * libata need to propagate the changes to SCSI layer.
3693 * Kernel thread context (may sleep).
3695 void ata_scsi_dev_rescan(struct work_struct *work)
3697 struct ata_port *ap =
3698 container_of(work, struct ata_port, scsi_rescan_task);
3699 struct ata_link *link;
3700 struct ata_device *dev;
3701 unsigned long flags;
3703 mutex_lock(&ap->scsi_scan_mutex);
3704 spin_lock_irqsave(ap->lock, flags);
3706 ata_for_each_link(link, ap, EDGE) {
3707 ata_for_each_dev(dev, link, ENABLED) {
3708 struct scsi_device *sdev = dev->sdev;
3712 if (scsi_device_get(sdev))
3715 spin_unlock_irqrestore(ap->lock, flags);
3716 scsi_rescan_device(&(sdev->sdev_gendev));
3717 scsi_device_put(sdev);
3718 spin_lock_irqsave(ap->lock, flags);
3722 spin_unlock_irqrestore(ap->lock, flags);
3723 mutex_unlock(&ap->scsi_scan_mutex);
3727 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3728 * @host: ATA host container for all SAS ports
3729 * @port_info: Information from low-level host driver
3730 * @shost: SCSI host that the scsi device is attached to
3733 * PCI/etc. bus probe sem.
3736 * ata_port pointer on success / NULL on failure.
3739 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3740 struct ata_port_info *port_info,
3741 struct Scsi_Host *shost)
3743 struct ata_port *ap;
3745 ap = ata_port_alloc(host);
3750 ap->lock = shost->host_lock;
3751 ap->pio_mask = port_info->pio_mask;
3752 ap->mwdma_mask = port_info->mwdma_mask;
3753 ap->udma_mask = port_info->udma_mask;
3754 ap->flags |= port_info->flags;
3755 ap->ops = port_info->port_ops;
3756 ap->cbl = ATA_CBL_SATA;
3760 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3763 * ata_sas_port_start - Set port up for dma.
3764 * @ap: Port to initialize
3766 * Called just after data structures for each port are
3769 * May be used as the port_start() entry in ata_port_operations.
3772 * Inherited from caller.
3774 int ata_sas_port_start(struct ata_port *ap)
3778 EXPORT_SYMBOL_GPL(ata_sas_port_start);
3781 * ata_port_stop - Undo ata_sas_port_start()
3782 * @ap: Port to shut down
3784 * May be used as the port_stop() entry in ata_port_operations.
3787 * Inherited from caller.
3790 void ata_sas_port_stop(struct ata_port *ap)
3793 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3796 * ata_sas_port_init - Initialize a SATA device
3797 * @ap: SATA port to initialize
3800 * PCI/etc. bus probe sem.
3803 * Zero on success, non-zero on error.
3806 int ata_sas_port_init(struct ata_port *ap)
3808 int rc = ap->ops->port_start(ap);
3811 ap->print_id = ata_print_id++;
3812 rc = ata_bus_probe(ap);
3817 EXPORT_SYMBOL_GPL(ata_sas_port_init);
3820 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3821 * @ap: SATA port to destroy
3825 void ata_sas_port_destroy(struct ata_port *ap)
3827 if (ap->ops->port_stop)
3828 ap->ops->port_stop(ap);
3831 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3834 * ata_sas_slave_configure - Default slave_config routine for libata devices
3835 * @sdev: SCSI device to configure
3836 * @ap: ATA port to which SCSI device is attached
3842 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3844 ata_scsi_sdev_config(sdev);
3845 ata_scsi_dev_config(sdev, ap->link.device);
3848 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3851 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3852 * @cmd: SCSI command to be sent
3853 * @ap: ATA port to which the command is being sent
3856 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3860 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
3864 ata_scsi_dump_cdb(ap, cmd);
3866 if (likely(ata_dev_enabled(ap->link.device)))
3867 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
3869 cmd->result = (DID_BAD_TARGET << 16);
3870 cmd->scsi_done(cmd);
3874 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);