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 <linux/export.h>
41 #include <scsi/scsi.h>
42 #include <scsi/scsi_host.h>
43 #include <scsi/scsi_cmnd.h>
44 #include <scsi/scsi_eh.h>
45 #include <scsi/scsi_device.h>
46 #include <scsi/scsi_tcq.h>
47 #include <scsi/scsi_transport.h>
48 #include <linux/libata.h>
49 #include <linux/hdreg.h>
50 #include <linux/uaccess.h>
51 #include <linux/suspend.h>
52 #include <asm/unaligned.h>
55 #include "libata-transport.h"
57 #define ATA_SCSI_RBUF_SIZE 4096
59 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
60 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
62 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
64 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
65 const struct scsi_device *scsidev);
66 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
67 const struct scsi_device *scsidev);
69 #define RW_RECOVERY_MPAGE 0x1
70 #define RW_RECOVERY_MPAGE_LEN 12
71 #define CACHE_MPAGE 0x8
72 #define CACHE_MPAGE_LEN 20
73 #define CONTROL_MPAGE 0xa
74 #define CONTROL_MPAGE_LEN 12
75 #define ALL_MPAGES 0x3f
76 #define ALL_SUB_MPAGES 0xff
79 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
81 RW_RECOVERY_MPAGE_LEN - 2,
83 0, /* read retry count */
85 0, /* write retry count */
89 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
92 0, /* contains WCE, needs to be 0 for logic */
93 0, 0, 0, 0, 0, 0, 0, 0, 0,
94 0, /* contains DRA, needs to be 0 for logic */
98 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
100 CONTROL_MPAGE_LEN - 2,
101 2, /* DSENSE=0, GLTSD=1 */
102 0, /* [QAM+QERR may be 1, see 05-359r1] */
103 0, 0, 0, 0, 0xff, 0xff,
104 0, 30 /* extended self test time, see 05-359r1 */
107 static const char *ata_lpm_policy_names[] = {
108 [ATA_LPM_UNKNOWN] = "max_performance",
109 [ATA_LPM_MAX_POWER] = "max_performance",
110 [ATA_LPM_MED_POWER] = "medium_power",
111 [ATA_LPM_MIN_POWER] = "min_power",
114 static ssize_t ata_scsi_lpm_store(struct device *device,
115 struct device_attribute *attr,
116 const char *buf, size_t count)
118 struct Scsi_Host *shost = class_to_shost(device);
119 struct ata_port *ap = ata_shost_to_port(shost);
120 struct ata_link *link;
121 struct ata_device *dev;
122 enum ata_lpm_policy policy;
125 /* UNKNOWN is internal state, iterate from MAX_POWER */
126 for (policy = ATA_LPM_MAX_POWER;
127 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
128 const char *name = ata_lpm_policy_names[policy];
130 if (strncmp(name, buf, strlen(name)) == 0)
133 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
136 spin_lock_irqsave(ap->lock, flags);
138 ata_for_each_link(link, ap, EDGE) {
139 ata_for_each_dev(dev, &ap->link, ENABLED) {
140 if (dev->horkage & ATA_HORKAGE_NOLPM) {
147 ap->target_lpm_policy = policy;
148 ata_port_schedule_eh(ap);
150 spin_unlock_irqrestore(ap->lock, flags);
154 static ssize_t ata_scsi_lpm_show(struct device *dev,
155 struct device_attribute *attr, char *buf)
157 struct Scsi_Host *shost = class_to_shost(dev);
158 struct ata_port *ap = ata_shost_to_port(shost);
160 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
163 return snprintf(buf, PAGE_SIZE, "%s\n",
164 ata_lpm_policy_names[ap->target_lpm_policy]);
166 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
167 ata_scsi_lpm_show, ata_scsi_lpm_store);
168 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
170 static ssize_t ata_scsi_park_show(struct device *device,
171 struct device_attribute *attr, char *buf)
173 struct scsi_device *sdev = to_scsi_device(device);
175 struct ata_link *link;
176 struct ata_device *dev;
177 unsigned long flags, now;
178 unsigned int uninitialized_var(msecs);
181 ap = ata_shost_to_port(sdev->host);
183 spin_lock_irqsave(ap->lock, flags);
184 dev = ata_scsi_find_dev(ap, sdev);
189 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
196 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
197 link->eh_context.unloaded_mask & (1 << dev->devno) &&
198 time_after(dev->unpark_deadline, now))
199 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
204 spin_unlock_irq(ap->lock);
206 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
209 static ssize_t ata_scsi_park_store(struct device *device,
210 struct device_attribute *attr,
211 const char *buf, size_t len)
213 struct scsi_device *sdev = to_scsi_device(device);
215 struct ata_device *dev;
220 rc = strict_strtol(buf, 10, &input);
221 if (rc || input < -2)
223 if (input > ATA_TMOUT_MAX_PARK) {
225 input = ATA_TMOUT_MAX_PARK;
228 ap = ata_shost_to_port(sdev->host);
230 spin_lock_irqsave(ap->lock, flags);
231 dev = ata_scsi_find_dev(ap, sdev);
232 if (unlikely(!dev)) {
236 if (dev->class != ATA_DEV_ATA) {
242 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
247 dev->unpark_deadline = ata_deadline(jiffies, input);
248 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
249 ata_port_schedule_eh(ap);
250 complete(&ap->park_req_pending);
254 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
257 dev->flags |= ATA_DFLAG_NO_UNLOAD;
262 spin_unlock_irqrestore(ap->lock, flags);
264 return rc ? rc : len;
266 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
267 ata_scsi_park_show, ata_scsi_park_store);
268 EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
270 static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
272 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
274 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
278 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
279 const char *buf, size_t count)
281 struct Scsi_Host *shost = class_to_shost(dev);
282 struct ata_port *ap = ata_shost_to_port(shost);
283 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
284 return ap->ops->em_store(ap, buf, count);
289 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
292 struct Scsi_Host *shost = class_to_shost(dev);
293 struct ata_port *ap = ata_shost_to_port(shost);
295 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
296 return ap->ops->em_show(ap, buf);
299 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
300 ata_scsi_em_message_show, ata_scsi_em_message_store);
301 EXPORT_SYMBOL_GPL(dev_attr_em_message);
304 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
307 struct Scsi_Host *shost = class_to_shost(dev);
308 struct ata_port *ap = ata_shost_to_port(shost);
310 return snprintf(buf, 23, "%d\n", ap->em_message_type);
312 DEVICE_ATTR(em_message_type, S_IRUGO,
313 ata_scsi_em_message_type_show, NULL);
314 EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
317 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
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);
324 if (atadev && ap->ops->sw_activity_show &&
325 (ap->flags & ATA_FLAG_SW_ACTIVITY))
326 return ap->ops->sw_activity_show(atadev, buf);
331 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
332 const char *buf, size_t count)
334 struct scsi_device *sdev = to_scsi_device(dev);
335 struct ata_port *ap = ata_shost_to_port(sdev->host);
336 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
337 enum sw_activity val;
340 if (atadev && ap->ops->sw_activity_store &&
341 (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
342 val = simple_strtoul(buf, NULL, 0);
344 case OFF: case BLINK_ON: case BLINK_OFF:
345 rc = ap->ops->sw_activity_store(atadev, val);
354 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
355 ata_scsi_activity_store);
356 EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
358 struct device_attribute *ata_common_sdev_attrs[] = {
359 &dev_attr_unload_heads,
362 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
364 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd)
366 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
367 /* "Invalid field in cbd" */
372 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
373 * @sdev: SCSI device for which BIOS geometry is to be determined
374 * @bdev: block device associated with @sdev
375 * @capacity: capacity of SCSI device
376 * @geom: location to which geometry will be output
378 * Generic bios head/sector/cylinder calculator
379 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
380 * mapping. Some situations may arise where the disk is not
381 * bootable if this is not used.
384 * Defined by the SCSI layer. We don't really care.
389 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
390 sector_t capacity, int geom[])
394 sector_div(capacity, 255*63);
401 * ata_scsi_unlock_native_capacity - unlock native capacity
402 * @sdev: SCSI device to adjust device capacity for
404 * This function is called if a partition on @sdev extends beyond
405 * the end of the device. It requests EH to unlock HPA.
408 * Defined by the SCSI layer. Might sleep.
410 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
412 struct ata_port *ap = ata_shost_to_port(sdev->host);
413 struct ata_device *dev;
416 spin_lock_irqsave(ap->lock, flags);
418 dev = ata_scsi_find_dev(ap, sdev);
419 if (dev && dev->n_sectors < dev->n_native_sectors) {
420 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
421 dev->link->eh_info.action |= ATA_EH_RESET;
422 ata_port_schedule_eh(ap);
425 spin_unlock_irqrestore(ap->lock, flags);
426 ata_port_wait_eh(ap);
430 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
432 * @sdev: SCSI device to get identify data for
433 * @arg: User buffer area for identify data
436 * Defined by the SCSI layer. We don't really care.
439 * Zero on success, negative errno on error.
441 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
444 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
445 u16 __user *dst = arg;
451 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
454 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
455 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
458 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
459 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
462 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
463 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
470 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
471 * @scsidev: Device to which we are issuing command
472 * @arg: User provided data for issuing command
475 * Defined by the SCSI layer. We don't really care.
478 * Zero on success, negative errno on error.
480 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
483 u8 scsi_cmd[MAX_COMMAND_SIZE];
484 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
486 enum dma_data_direction data_dir;
492 if (copy_from_user(args, arg, sizeof(args)))
495 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
499 memset(scsi_cmd, 0, sizeof(scsi_cmd));
502 argsize = ATA_SECT_SIZE * args[3];
503 argbuf = kmalloc(argsize, GFP_KERNEL);
504 if (argbuf == NULL) {
509 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
510 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
511 block count in sector count field */
512 data_dir = DMA_FROM_DEVICE;
514 scsi_cmd[1] = (3 << 1); /* Non-data */
515 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
519 scsi_cmd[0] = ATA_16;
521 scsi_cmd[4] = args[2];
522 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
523 scsi_cmd[6] = args[3];
524 scsi_cmd[8] = args[1];
528 scsi_cmd[6] = args[1];
530 scsi_cmd[14] = args[0];
532 /* Good values for timeout and retries? Values below
533 from scsi_ioctl_send_command() for default case... */
534 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
535 sensebuf, (10*HZ), 5, 0, NULL);
537 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
538 u8 *desc = sensebuf + 8;
539 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
541 /* If we set cc then ATA pass-through will cause a
542 * check condition even if no error. Filter that. */
543 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
544 struct scsi_sense_hdr sshdr;
545 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
547 if (sshdr.sense_key == 0 &&
548 sshdr.asc == 0 && sshdr.ascq == 0)
549 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
552 /* Send userspace a few ATA registers (same as drivers/ide) */
553 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
554 desc[0] == 0x09) { /* code is "ATA Descriptor" */
555 args[0] = desc[13]; /* status */
556 args[1] = desc[3]; /* error */
557 args[2] = desc[5]; /* sector count (0:7) */
558 if (copy_to_user(arg, args, sizeof(args)))
570 && copy_to_user(arg + sizeof(args), argbuf, argsize))
579 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
580 * @scsidev: Device to which we are issuing command
581 * @arg: User provided data for issuing command
584 * Defined by the SCSI layer. We don't really care.
587 * Zero on success, negative errno on error.
589 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
592 u8 scsi_cmd[MAX_COMMAND_SIZE];
593 u8 args[7], *sensebuf = NULL;
599 if (copy_from_user(args, arg, sizeof(args)))
602 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
606 memset(scsi_cmd, 0, sizeof(scsi_cmd));
607 scsi_cmd[0] = ATA_16;
608 scsi_cmd[1] = (3 << 1); /* Non-data */
609 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
610 scsi_cmd[4] = args[1];
611 scsi_cmd[6] = args[2];
612 scsi_cmd[8] = args[3];
613 scsi_cmd[10] = args[4];
614 scsi_cmd[12] = args[5];
615 scsi_cmd[13] = args[6] & 0x4f;
616 scsi_cmd[14] = args[0];
618 /* Good values for timeout and retries? Values below
619 from scsi_ioctl_send_command() for default case... */
620 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
621 sensebuf, (10*HZ), 5, 0, NULL);
623 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
624 u8 *desc = sensebuf + 8;
625 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
627 /* If we set cc then ATA pass-through will cause a
628 * check condition even if no error. Filter that. */
629 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
630 struct scsi_sense_hdr sshdr;
631 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
633 if (sshdr.sense_key == 0 &&
634 sshdr.asc == 0 && sshdr.ascq == 0)
635 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
638 /* Send userspace ATA registers */
639 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
640 desc[0] == 0x09) {/* code is "ATA Descriptor" */
641 args[0] = desc[13]; /* status */
642 args[1] = desc[3]; /* error */
643 args[2] = desc[5]; /* sector count (0:7) */
644 args[3] = desc[7]; /* lbal */
645 args[4] = desc[9]; /* lbam */
646 args[5] = desc[11]; /* lbah */
647 args[6] = desc[12]; /* select */
648 if (copy_to_user(arg, args, sizeof(args)))
663 static int ata_ioc32(struct ata_port *ap)
665 if (ap->flags & ATA_FLAG_PIO_DMA)
667 if (ap->pflags & ATA_PFLAG_PIO32)
672 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
673 int cmd, void __user *arg)
675 int val = -EINVAL, rc = -EINVAL;
679 case ATA_IOC_GET_IO32:
680 spin_lock_irqsave(ap->lock, flags);
682 spin_unlock_irqrestore(ap->lock, flags);
683 if (copy_to_user(arg, &val, 1))
687 case ATA_IOC_SET_IO32:
688 val = (unsigned long) arg;
690 spin_lock_irqsave(ap->lock, flags);
691 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
693 ap->pflags |= ATA_PFLAG_PIO32;
695 ap->pflags &= ~ATA_PFLAG_PIO32;
697 if (val != ata_ioc32(ap))
700 spin_unlock_irqrestore(ap->lock, flags);
703 case HDIO_GET_IDENTITY:
704 return ata_get_identity(ap, scsidev, arg);
707 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
709 return ata_cmd_ioctl(scsidev, arg);
711 case HDIO_DRIVE_TASK:
712 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
714 return ata_task_ioctl(scsidev, arg);
723 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
725 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
727 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
730 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
733 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
734 * @dev: ATA device to which the new command is attached
735 * @cmd: SCSI command that originated this ATA command
737 * Obtain a reference to an unused ata_queued_cmd structure,
738 * which is the basic libata structure representing a single
739 * ATA command sent to the hardware.
741 * If a command was available, fill in the SCSI-specific
742 * portions of the structure with information on the
746 * spin_lock_irqsave(host lock)
749 * Command allocated, or %NULL if none available.
751 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
752 struct scsi_cmnd *cmd)
754 struct ata_queued_cmd *qc;
756 qc = ata_qc_new_init(dev);
759 qc->scsidone = cmd->scsi_done;
761 qc->sg = scsi_sglist(cmd);
762 qc->n_elem = scsi_sg_count(cmd);
764 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
771 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
773 struct scsi_cmnd *scmd = qc->scsicmd;
775 qc->extrabytes = scmd->request->extra_len;
776 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
780 * ata_dump_status - user friendly display of error info
781 * @id: id of the port in question
782 * @tf: ptr to filled out taskfile
784 * Decode and dump the ATA error/status registers for the user so
785 * that they have some idea what really happened at the non
786 * make-believe layer.
789 * inherited from caller
791 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
793 u8 stat = tf->command, err = tf->feature;
795 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
796 if (stat & ATA_BUSY) {
797 printk("Busy }\n"); /* Data is not valid in this case */
799 if (stat & 0x40) printk("DriveReady ");
800 if (stat & 0x20) printk("DeviceFault ");
801 if (stat & 0x10) printk("SeekComplete ");
802 if (stat & 0x08) printk("DataRequest ");
803 if (stat & 0x04) printk("CorrectedError ");
804 if (stat & 0x02) printk("Index ");
805 if (stat & 0x01) printk("Error ");
809 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
810 if (err & 0x04) printk("DriveStatusError ");
812 if (err & 0x04) printk("BadCRC ");
813 else printk("Sector ");
815 if (err & 0x40) printk("UncorrectableError ");
816 if (err & 0x10) printk("SectorIdNotFound ");
817 if (err & 0x02) printk("TrackZeroNotFound ");
818 if (err & 0x01) printk("AddrMarkNotFound ");
825 * ata_to_sense_error - convert ATA error to SCSI error
826 * @id: ATA device number
827 * @drv_stat: value contained in ATA status register
828 * @drv_err: value contained in ATA error register
829 * @sk: the sense key we'll fill out
830 * @asc: the additional sense code we'll fill out
831 * @ascq: the additional sense code qualifier we'll fill out
832 * @verbose: be verbose
834 * Converts an ATA error into a SCSI error. Fill out pointers to
835 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
836 * format sense blocks.
839 * spin_lock_irqsave(host lock)
841 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
842 u8 *asc, u8 *ascq, int verbose)
846 /* Based on the 3ware driver translation table */
847 static const unsigned char sense_table[][4] = {
849 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
851 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
853 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
854 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
855 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
856 /* MC|ID|ABRT|TRK0|MARK */
857 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
859 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
860 /* Bad address mark */
861 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
863 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
865 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
866 /* Media change request */
867 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
869 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
871 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
873 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
874 /* BBD - block marked bad */
875 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
876 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
878 static const unsigned char stat_table[][4] = {
879 /* Must be first because BUSY means no other bits valid */
880 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
881 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
882 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
883 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
884 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
888 * Is this an error we can process/parse
890 if (drv_stat & ATA_BUSY) {
891 drv_err = 0; /* Ignore the err bits, they're invalid */
895 /* Look for drv_err */
896 for (i = 0; sense_table[i][0] != 0xFF; i++) {
897 /* Look for best matches first */
898 if ((sense_table[i][0] & drv_err) ==
900 *sk = sense_table[i][1];
901 *asc = sense_table[i][2];
902 *ascq = sense_table[i][3];
906 /* No immediate match */
908 printk(KERN_WARNING "ata%u: no sense translation for "
909 "error 0x%02x\n", id, drv_err);
912 /* Fall back to interpreting status bits */
913 for (i = 0; stat_table[i][0] != 0xFF; i++) {
914 if (stat_table[i][0] & drv_stat) {
915 *sk = stat_table[i][1];
916 *asc = stat_table[i][2];
917 *ascq = stat_table[i][3];
921 /* No error? Undecoded? */
923 printk(KERN_WARNING "ata%u: no sense translation for "
924 "status: 0x%02x\n", id, drv_stat);
926 /* We need a sensible error return here, which is tricky, and one
927 that won't cause people to do things like return a disk wrongly */
928 *sk = ABORTED_COMMAND;
934 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
935 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
936 id, drv_stat, drv_err, *sk, *asc, *ascq);
941 * ata_gen_passthru_sense - Generate check condition sense block.
942 * @qc: Command that completed.
944 * This function is specific to the ATA descriptor format sense
945 * block specified for the ATA pass through commands. Regardless
946 * of whether the command errored or not, return a sense
947 * block. Copy all controller registers into the sense
948 * block. Clear sense key, ASC & ASCQ if there is no error.
953 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
955 struct scsi_cmnd *cmd = qc->scsicmd;
956 struct ata_taskfile *tf = &qc->result_tf;
957 unsigned char *sb = cmd->sense_buffer;
958 unsigned char *desc = sb + 8;
959 int verbose = qc->ap->ops->error_handler == NULL;
961 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
963 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
966 * Use ata_to_sense_error() to map status register bits
967 * onto sense key, asc & ascq.
970 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
971 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
972 &sb[1], &sb[2], &sb[3], verbose);
977 * Sense data is current and format is descriptor.
983 /* set length of additional sense data */
988 * Copy registers into sense buffer.
991 desc[3] = tf->feature; /* == error reg */
996 desc[12] = tf->device;
997 desc[13] = tf->command; /* == status reg */
1000 * Fill in Extend bit, and the high order bytes
1003 if (tf->flags & ATA_TFLAG_LBA48) {
1005 desc[4] = tf->hob_nsect;
1006 desc[6] = tf->hob_lbal;
1007 desc[8] = tf->hob_lbam;
1008 desc[10] = tf->hob_lbah;
1013 * ata_gen_ata_sense - generate a SCSI fixed sense block
1014 * @qc: Command that we are erroring out
1016 * Generate sense block for a failed ATA command @qc. Descriptor
1017 * format is used to accommodate LBA48 block address.
1022 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1024 struct ata_device *dev = qc->dev;
1025 struct scsi_cmnd *cmd = qc->scsicmd;
1026 struct ata_taskfile *tf = &qc->result_tf;
1027 unsigned char *sb = cmd->sense_buffer;
1028 unsigned char *desc = sb + 8;
1029 int verbose = qc->ap->ops->error_handler == NULL;
1032 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1034 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1036 /* sense data is current and format is descriptor */
1039 /* Use ata_to_sense_error() to map status register bits
1040 * onto sense key, asc & ascq.
1043 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1044 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1045 &sb[1], &sb[2], &sb[3], verbose);
1049 block = ata_tf_read_block(&qc->result_tf, dev);
1051 /* information sense data descriptor */
1056 desc[2] |= 0x80; /* valid */
1057 desc[6] = block >> 40;
1058 desc[7] = block >> 32;
1059 desc[8] = block >> 24;
1060 desc[9] = block >> 16;
1061 desc[10] = block >> 8;
1065 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1067 sdev->use_10_for_rw = 1;
1068 sdev->use_10_for_ms = 1;
1070 /* Schedule policy is determined by ->qc_defer() callback and
1071 * it needs to see every deferred qc. Set dev_blocked to 1 to
1072 * prevent SCSI midlayer from automatically deferring
1075 sdev->max_device_blocked = 1;
1079 * atapi_drain_needed - Check whether data transfer may overflow
1080 * @rq: request to be checked
1082 * ATAPI commands which transfer variable length data to host
1083 * might overflow due to application error or hardare bug. This
1084 * function checks whether overflow should be drained and ignored
1091 * 1 if ; otherwise, 0.
1093 static int atapi_drain_needed(struct request *rq)
1095 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
1098 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
1101 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1104 static int ata_scsi_dev_config(struct scsi_device *sdev,
1105 struct ata_device *dev)
1107 struct request_queue *q = sdev->request_queue;
1109 if (!ata_id_has_unload(dev->id))
1110 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1112 /* configure max sectors */
1113 blk_queue_max_hw_sectors(q, dev->max_sectors);
1115 if (dev->class == ATA_DEV_ATAPI) {
1118 sdev->sector_size = ATA_SECT_SIZE;
1120 /* set DMA padding */
1121 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1123 /* configure draining */
1124 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1126 ata_dev_err(dev, "drain buffer allocation failed\n");
1130 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1132 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1133 sdev->manage_start_stop = 1;
1137 * ata_pio_sectors() expects buffer for each sector to not cross
1138 * page boundary. Enforce it by requiring buffers to be sector
1139 * aligned, which works iff sector_size is not larger than
1140 * PAGE_SIZE. ATAPI devices also need the alignment as
1141 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1143 if (sdev->sector_size > PAGE_SIZE)
1145 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1148 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1150 if (dev->flags & ATA_DFLAG_AN)
1151 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1153 if (dev->flags & ATA_DFLAG_NCQ) {
1156 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1157 depth = min(ATA_MAX_QUEUE - 1, depth);
1158 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
1161 blk_queue_flush_queueable(q, false);
1168 * ata_scsi_slave_config - Set SCSI device attributes
1169 * @sdev: SCSI device to examine
1171 * This is called before we actually start reading
1172 * and writing to the device, to configure certain
1173 * SCSI mid-layer behaviors.
1176 * Defined by SCSI layer. We don't really care.
1179 int ata_scsi_slave_config(struct scsi_device *sdev)
1181 struct ata_port *ap = ata_shost_to_port(sdev->host);
1182 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1185 ata_scsi_sdev_config(sdev);
1188 rc = ata_scsi_dev_config(sdev, dev);
1194 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1195 * @sdev: SCSI device to be destroyed
1197 * @sdev is about to be destroyed for hot/warm unplugging. If
1198 * this unplugging was initiated by libata as indicated by NULL
1199 * dev->sdev, this function doesn't have to do anything.
1200 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1201 * Clear dev->sdev, schedule the device for ATA detach and invoke
1205 * Defined by SCSI layer. We don't really care.
1207 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1209 struct ata_port *ap = ata_shost_to_port(sdev->host);
1210 struct request_queue *q = sdev->request_queue;
1211 unsigned long flags;
1212 struct ata_device *dev;
1214 if (!ap->ops->error_handler)
1217 spin_lock_irqsave(ap->lock, flags);
1218 dev = __ata_scsi_find_dev(ap, sdev);
1219 if (dev && dev->sdev) {
1220 /* SCSI device already in CANCEL state, no need to offline it */
1222 dev->flags |= ATA_DFLAG_DETACH;
1223 ata_port_schedule_eh(ap);
1225 spin_unlock_irqrestore(ap->lock, flags);
1227 kfree(q->dma_drain_buffer);
1228 q->dma_drain_buffer = NULL;
1229 q->dma_drain_size = 0;
1233 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1234 * @ap: ATA port to which the device change the queue depth
1235 * @sdev: SCSI device to configure queue depth for
1236 * @queue_depth: new queue depth
1237 * @reason: calling context
1239 * libsas and libata have different approaches for associating a sdev to
1243 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1244 int queue_depth, int reason)
1246 struct ata_device *dev;
1247 unsigned long flags;
1249 if (reason != SCSI_QDEPTH_DEFAULT)
1252 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1253 return sdev->queue_depth;
1255 dev = ata_scsi_find_dev(ap, sdev);
1256 if (!dev || !ata_dev_enabled(dev))
1257 return sdev->queue_depth;
1260 spin_lock_irqsave(ap->lock, flags);
1261 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1262 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1263 dev->flags |= ATA_DFLAG_NCQ_OFF;
1266 spin_unlock_irqrestore(ap->lock, flags);
1268 /* limit and apply queue depth */
1269 queue_depth = min(queue_depth, sdev->host->can_queue);
1270 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1271 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1273 if (sdev->queue_depth == queue_depth)
1276 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
1281 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1282 * @sdev: SCSI device to configure queue depth for
1283 * @queue_depth: new queue depth
1284 * @reason: calling context
1286 * This is libata standard hostt->change_queue_depth callback.
1287 * SCSI will call into this callback when user tries to set queue
1291 * SCSI layer (we don't care)
1294 * Newly configured queue depth.
1296 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth,
1299 struct ata_port *ap = ata_shost_to_port(sdev->host);
1301 return __ata_change_queue_depth(ap, sdev, queue_depth, reason);
1305 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1306 * @qc: Storage for translated ATA taskfile
1308 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1309 * (to start). Perhaps these commands should be preceded by
1310 * CHECK POWER MODE to see what power mode the device is already in.
1311 * [See SAT revision 5 at www.t10.org]
1314 * spin_lock_irqsave(host lock)
1317 * Zero on success, non-zero on error.
1319 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1321 struct scsi_cmnd *scmd = qc->scsicmd;
1322 struct ata_taskfile *tf = &qc->tf;
1323 const u8 *cdb = scmd->cmnd;
1325 if (scmd->cmd_len < 5)
1328 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1329 tf->protocol = ATA_PROT_NODATA;
1331 ; /* ignore IMMED bit, violates sat-r05 */
1334 goto invalid_fld; /* LOEJ bit set not supported */
1335 if (((cdb[4] >> 4) & 0xf) != 0)
1336 goto invalid_fld; /* power conditions not supported */
1339 tf->nsect = 1; /* 1 sector, lba=0 */
1341 if (qc->dev->flags & ATA_DFLAG_LBA) {
1342 tf->flags |= ATA_TFLAG_LBA;
1347 tf->device |= ATA_LBA;
1350 tf->lbal = 0x1; /* sect */
1351 tf->lbam = 0x0; /* cyl low */
1352 tf->lbah = 0x0; /* cyl high */
1355 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1357 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1358 * or S5) causing some drives to spin up and down again.
1360 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1361 system_state == SYSTEM_POWER_OFF)
1364 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1365 system_entering_hibernation())
1368 /* Issue ATA STANDBY IMMEDIATE command */
1369 tf->command = ATA_CMD_STANDBYNOW1;
1373 * Standby and Idle condition timers could be implemented but that
1374 * would require libata to implement the Power condition mode page
1375 * and allow the user to change it. Changing mode pages requires
1376 * MODE SELECT to be implemented.
1382 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1383 /* "Invalid field in cbd" */
1386 scmd->result = SAM_STAT_GOOD;
1392 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1393 * @qc: Storage for translated ATA taskfile
1395 * Sets up an ATA taskfile to issue FLUSH CACHE or
1399 * spin_lock_irqsave(host lock)
1402 * Zero on success, non-zero on error.
1404 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1406 struct ata_taskfile *tf = &qc->tf;
1408 tf->flags |= ATA_TFLAG_DEVICE;
1409 tf->protocol = ATA_PROT_NODATA;
1411 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1412 tf->command = ATA_CMD_FLUSH_EXT;
1414 tf->command = ATA_CMD_FLUSH;
1416 /* flush is critical for IO integrity, consider it an IO command */
1417 qc->flags |= ATA_QCFLAG_IO;
1423 * scsi_6_lba_len - Get LBA and transfer length
1424 * @cdb: SCSI command to translate
1426 * Calculate LBA and transfer length for 6-byte commands.
1430 * @plen: the transfer length
1432 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1437 VPRINTK("six-byte command\n");
1439 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1440 lba |= ((u64)cdb[2]) << 8;
1441 lba |= ((u64)cdb[3]);
1450 * scsi_10_lba_len - Get LBA and transfer length
1451 * @cdb: SCSI command to translate
1453 * Calculate LBA and transfer length for 10-byte commands.
1457 * @plen: the transfer length
1459 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1464 VPRINTK("ten-byte command\n");
1466 lba |= ((u64)cdb[2]) << 24;
1467 lba |= ((u64)cdb[3]) << 16;
1468 lba |= ((u64)cdb[4]) << 8;
1469 lba |= ((u64)cdb[5]);
1471 len |= ((u32)cdb[7]) << 8;
1472 len |= ((u32)cdb[8]);
1479 * scsi_16_lba_len - Get LBA and transfer length
1480 * @cdb: SCSI command to translate
1482 * Calculate LBA and transfer length for 16-byte commands.
1486 * @plen: the transfer length
1488 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1493 VPRINTK("sixteen-byte command\n");
1495 lba |= ((u64)cdb[2]) << 56;
1496 lba |= ((u64)cdb[3]) << 48;
1497 lba |= ((u64)cdb[4]) << 40;
1498 lba |= ((u64)cdb[5]) << 32;
1499 lba |= ((u64)cdb[6]) << 24;
1500 lba |= ((u64)cdb[7]) << 16;
1501 lba |= ((u64)cdb[8]) << 8;
1502 lba |= ((u64)cdb[9]);
1504 len |= ((u32)cdb[10]) << 24;
1505 len |= ((u32)cdb[11]) << 16;
1506 len |= ((u32)cdb[12]) << 8;
1507 len |= ((u32)cdb[13]);
1514 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1515 * @qc: Storage for translated ATA taskfile
1517 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1520 * spin_lock_irqsave(host lock)
1523 * Zero on success, non-zero on error.
1525 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1527 struct scsi_cmnd *scmd = qc->scsicmd;
1528 struct ata_taskfile *tf = &qc->tf;
1529 struct ata_device *dev = qc->dev;
1530 u64 dev_sectors = qc->dev->n_sectors;
1531 const u8 *cdb = scmd->cmnd;
1535 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1536 tf->protocol = ATA_PROT_NODATA;
1538 if (cdb[0] == VERIFY) {
1539 if (scmd->cmd_len < 10)
1541 scsi_10_lba_len(cdb, &block, &n_block);
1542 } else if (cdb[0] == VERIFY_16) {
1543 if (scmd->cmd_len < 16)
1545 scsi_16_lba_len(cdb, &block, &n_block);
1551 if (block >= dev_sectors)
1553 if ((block + n_block) > dev_sectors)
1556 if (dev->flags & ATA_DFLAG_LBA) {
1557 tf->flags |= ATA_TFLAG_LBA;
1559 if (lba_28_ok(block, n_block)) {
1561 tf->command = ATA_CMD_VERIFY;
1562 tf->device |= (block >> 24) & 0xf;
1563 } else if (lba_48_ok(block, n_block)) {
1564 if (!(dev->flags & ATA_DFLAG_LBA48))
1568 tf->flags |= ATA_TFLAG_LBA48;
1569 tf->command = ATA_CMD_VERIFY_EXT;
1571 tf->hob_nsect = (n_block >> 8) & 0xff;
1573 tf->hob_lbah = (block >> 40) & 0xff;
1574 tf->hob_lbam = (block >> 32) & 0xff;
1575 tf->hob_lbal = (block >> 24) & 0xff;
1577 /* request too large even for LBA48 */
1580 tf->nsect = n_block & 0xff;
1582 tf->lbah = (block >> 16) & 0xff;
1583 tf->lbam = (block >> 8) & 0xff;
1584 tf->lbal = block & 0xff;
1586 tf->device |= ATA_LBA;
1589 u32 sect, head, cyl, track;
1591 if (!lba_28_ok(block, n_block))
1594 /* Convert LBA to CHS */
1595 track = (u32)block / dev->sectors;
1596 cyl = track / dev->heads;
1597 head = track % dev->heads;
1598 sect = (u32)block % dev->sectors + 1;
1600 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1601 (u32)block, track, cyl, head, sect);
1603 /* Check whether the converted CHS can fit.
1607 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1610 tf->command = ATA_CMD_VERIFY;
1611 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1614 tf->lbah = cyl >> 8;
1621 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1622 /* "Invalid field in cbd" */
1626 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1627 /* "Logical Block Address out of range" */
1631 scmd->result = SAM_STAT_GOOD;
1636 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1637 * @qc: Storage for translated ATA taskfile
1639 * Converts any of six SCSI read/write commands into the
1640 * ATA counterpart, including starting sector (LBA),
1641 * sector count, and taking into account the device's LBA48
1644 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1645 * %WRITE_16 are currently supported.
1648 * spin_lock_irqsave(host lock)
1651 * Zero on success, non-zero on error.
1653 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1655 struct scsi_cmnd *scmd = qc->scsicmd;
1656 const u8 *cdb = scmd->cmnd;
1657 unsigned int tf_flags = 0;
1662 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1663 tf_flags |= ATA_TFLAG_WRITE;
1665 /* Calculate the SCSI LBA, transfer length and FUA. */
1669 if (unlikely(scmd->cmd_len < 10))
1671 scsi_10_lba_len(cdb, &block, &n_block);
1672 if (unlikely(cdb[1] & (1 << 3)))
1673 tf_flags |= ATA_TFLAG_FUA;
1677 if (unlikely(scmd->cmd_len < 6))
1679 scsi_6_lba_len(cdb, &block, &n_block);
1681 /* for 6-byte r/w commands, transfer length 0
1682 * means 256 blocks of data, not 0 block.
1689 if (unlikely(scmd->cmd_len < 16))
1691 scsi_16_lba_len(cdb, &block, &n_block);
1692 if (unlikely(cdb[1] & (1 << 3)))
1693 tf_flags |= ATA_TFLAG_FUA;
1696 DPRINTK("no-byte command\n");
1700 /* Check and compose ATA command */
1702 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1703 * length 0 means transfer 0 block of data.
1704 * However, for ATA R/W commands, sector count 0 means
1705 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1707 * WARNING: one or two older ATA drives treat 0 as 0...
1711 qc->flags |= ATA_QCFLAG_IO;
1712 qc->nbytes = n_block * scmd->device->sector_size;
1714 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1716 if (likely(rc == 0))
1721 /* treat all other errors as -EINVAL, fall through */
1723 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1724 /* "Invalid field in cbd" */
1728 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1729 /* "Logical Block Address out of range" */
1733 scmd->result = SAM_STAT_GOOD;
1737 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1739 struct ata_port *ap = qc->ap;
1740 struct scsi_cmnd *cmd = qc->scsicmd;
1741 u8 *cdb = cmd->cmnd;
1742 int need_sense = (qc->err_mask != 0);
1744 /* For ATA pass thru (SAT) commands, generate a sense block if
1745 * user mandated it or if there's an error. Note that if we
1746 * generate because the user forced us to, a check condition
1747 * is generated and the ATA register values are returned
1748 * whether the command completed successfully or not. If there
1749 * was no error, SK, ASC and ASCQ will all be zero.
1751 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1752 ((cdb[2] & 0x20) || need_sense)) {
1753 ata_gen_passthru_sense(qc);
1756 cmd->result = SAM_STAT_GOOD;
1758 /* TODO: decide which descriptor format to use
1759 * for 48b LBA devices and call that here
1760 * instead of the fixed desc, which is only
1761 * good for smaller LBA (and maybe CHS?)
1764 ata_gen_ata_sense(qc);
1768 if (need_sense && !ap->ops->error_handler)
1769 ata_dump_status(ap->print_id, &qc->result_tf);
1777 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1778 * @dev: ATA device to which the command is addressed
1779 * @cmd: SCSI command to execute
1780 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1782 * Our ->queuecommand() function has decided that the SCSI
1783 * command issued can be directly translated into an ATA
1784 * command, rather than handled internally.
1786 * This function sets up an ata_queued_cmd structure for the
1787 * SCSI command, and sends that ata_queued_cmd to the hardware.
1789 * The xlat_func argument (actor) returns 0 if ready to execute
1790 * ATA command, else 1 to finish translation. If 1 is returned
1791 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1792 * to be set reflecting an error condition or clean (early)
1796 * spin_lock_irqsave(host lock)
1799 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1800 * needs to be deferred.
1802 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1803 ata_xlat_func_t xlat_func)
1805 struct ata_port *ap = dev->link->ap;
1806 struct ata_queued_cmd *qc;
1811 qc = ata_scsi_qc_new(dev, cmd);
1815 /* data is present; dma-map it */
1816 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1817 cmd->sc_data_direction == DMA_TO_DEVICE) {
1818 if (unlikely(scsi_bufflen(cmd) < 1)) {
1819 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
1823 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1825 qc->dma_dir = cmd->sc_data_direction;
1828 qc->complete_fn = ata_scsi_qc_complete;
1833 if (ap->ops->qc_defer) {
1834 if ((rc = ap->ops->qc_defer(qc)))
1838 /* select device, send command to hardware */
1846 cmd->scsi_done(cmd);
1847 DPRINTK("EXIT - early finish (good or error)\n");
1852 cmd->result = (DID_ERROR << 16);
1853 cmd->scsi_done(cmd);
1855 DPRINTK("EXIT - internal\n");
1860 DPRINTK("EXIT - defer\n");
1861 if (rc == ATA_DEFER_LINK)
1862 return SCSI_MLQUEUE_DEVICE_BUSY;
1864 return SCSI_MLQUEUE_HOST_BUSY;
1868 * ata_scsi_rbuf_get - Map response buffer.
1869 * @cmd: SCSI command containing buffer to be mapped.
1870 * @flags: unsigned long variable to store irq enable status
1871 * @copy_in: copy in from user buffer
1873 * Prepare buffer for simulated SCSI commands.
1876 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1879 * Pointer to response buffer.
1881 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1882 unsigned long *flags)
1884 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1886 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1888 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1889 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1890 return ata_scsi_rbuf;
1894 * ata_scsi_rbuf_put - Unmap response buffer.
1895 * @cmd: SCSI command containing buffer to be unmapped.
1896 * @copy_out: copy out result
1897 * @flags: @flags passed to ata_scsi_rbuf_get()
1899 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1900 * @copy_back is true.
1903 * Unlocks ata_scsi_rbuf_lock.
1905 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1906 unsigned long *flags)
1909 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1910 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1911 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1915 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1916 * @args: device IDENTIFY data / SCSI command of interest.
1917 * @actor: Callback hook for desired SCSI command simulator
1919 * Takes care of the hard work of simulating a SCSI command...
1920 * Mapping the response buffer, calling the command's handler,
1921 * and handling the handler's return value. This return value
1922 * indicates whether the handler wishes the SCSI command to be
1923 * completed successfully (0), or not (in which case cmd->result
1924 * and sense buffer are assumed to be set).
1927 * spin_lock_irqsave(host lock)
1929 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1930 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1934 struct scsi_cmnd *cmd = args->cmd;
1935 unsigned long flags;
1937 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1938 rc = actor(args, rbuf);
1939 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
1942 cmd->result = SAM_STAT_GOOD;
1947 * ata_scsiop_inq_std - Simulate INQUIRY command
1948 * @args: device IDENTIFY data / SCSI command of interest.
1949 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1951 * Returns standard device identification data associated
1952 * with non-VPD INQUIRY command output.
1955 * spin_lock_irqsave(host lock)
1957 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1959 const u8 versions[] = {
1960 0x60, /* SAM-3 (no version claimed) */
1963 0x20, /* SBC-2 (no version claimed) */
1966 0x60 /* SPC-3 (no version claimed) */
1971 0x5, /* claim SPC-3 version compatibility */
1978 /* set scsi removeable (RMB) bit per ata bit */
1979 if (ata_id_removeable(args->id))
1982 memcpy(rbuf, hdr, sizeof(hdr));
1983 memcpy(&rbuf[8], "ATA ", 8);
1984 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1985 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1987 if (rbuf[32] == 0 || rbuf[32] == ' ')
1988 memcpy(&rbuf[32], "n/a ", 4);
1990 memcpy(rbuf + 59, versions, sizeof(versions));
1996 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1997 * @args: device IDENTIFY data / SCSI command of interest.
1998 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2000 * Returns list of inquiry VPD pages available.
2003 * spin_lock_irqsave(host lock)
2005 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
2007 const u8 pages[] = {
2008 0x00, /* page 0x00, this page */
2009 0x80, /* page 0x80, unit serial no page */
2010 0x83, /* page 0x83, device ident page */
2011 0x89, /* page 0x89, ata info page */
2012 0xb0, /* page 0xb0, block limits page */
2013 0xb1, /* page 0xb1, block device characteristics page */
2014 0xb2, /* page 0xb2, thin provisioning page */
2017 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
2018 memcpy(rbuf + 4, pages, sizeof(pages));
2023 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2024 * @args: device IDENTIFY data / SCSI command of interest.
2025 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2027 * Returns ATA device serial number.
2030 * spin_lock_irqsave(host lock)
2032 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2036 0x80, /* this page code */
2038 ATA_ID_SERNO_LEN, /* page len */
2041 memcpy(rbuf, hdr, sizeof(hdr));
2042 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2043 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2048 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2049 * @args: device IDENTIFY data / SCSI command of interest.
2050 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2052 * Yields two logical unit device identification designators:
2053 * - vendor specific ASCII containing the ATA serial number
2054 * - SAT defined "t10 vendor id based" containing ASCII vendor
2055 * name ("ATA "), model and serial numbers.
2058 * spin_lock_irqsave(host lock)
2060 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2062 const int sat_model_serial_desc_len = 68;
2065 rbuf[1] = 0x83; /* this page code */
2068 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2070 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2072 ata_id_string(args->id, (unsigned char *) rbuf + num,
2073 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2074 num += ATA_ID_SERNO_LEN;
2076 /* SAT defined lu model and serial numbers descriptor */
2077 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2080 rbuf[num + 3] = sat_model_serial_desc_len;
2082 memcpy(rbuf + num, "ATA ", 8);
2084 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2086 num += ATA_ID_PROD_LEN;
2087 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2089 num += ATA_ID_SERNO_LEN;
2091 if (ata_id_has_wwn(args->id)) {
2092 /* SAT defined lu world wide name */
2093 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2096 rbuf[num + 3] = ATA_ID_WWN_LEN;
2098 ata_id_string(args->id, (unsigned char *) rbuf + num,
2099 ATA_ID_WWN, ATA_ID_WWN_LEN);
2100 num += ATA_ID_WWN_LEN;
2102 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2107 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2108 * @args: device IDENTIFY data / SCSI command of interest.
2109 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2111 * Yields SAT-specified ATA VPD page.
2114 * spin_lock_irqsave(host lock)
2116 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2118 struct ata_taskfile tf;
2120 memset(&tf, 0, sizeof(tf));
2122 rbuf[1] = 0x89; /* our page code */
2123 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2124 rbuf[3] = (0x238 & 0xff);
2126 memcpy(&rbuf[8], "linux ", 8);
2127 memcpy(&rbuf[16], "libata ", 16);
2128 memcpy(&rbuf[32], DRV_VERSION, 4);
2129 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2131 /* we don't store the ATA device signature, so we fake it */
2133 tf.command = ATA_DRDY; /* really, this is Status reg */
2137 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2138 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2140 rbuf[56] = ATA_CMD_ID_ATA;
2142 memcpy(&rbuf[60], &args->id[0], 512);
2146 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2151 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2154 * Optimal transfer length granularity.
2156 * This is always one physical block, but for disks with a smaller
2157 * logical than physical sector size we need to figure out what the
2160 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2161 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2164 * Optimal unmap granularity.
2166 * The ATA spec doesn't even know about a granularity or alignment
2167 * for the TRIM command. We can leave away most of the unmap related
2168 * VPD page entries, but we have specifify a granularity to signal
2169 * that we support some form of unmap - in thise case via WRITE SAME
2170 * with the unmap bit set.
2172 if (ata_id_has_trim(args->id)) {
2173 put_unaligned_be64(65535 * 512 / 8, &rbuf[36]);
2174 put_unaligned_be32(1, &rbuf[28]);
2180 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2182 int form_factor = ata_id_form_factor(args->id);
2183 int media_rotation_rate = ata_id_rotation_rate(args->id);
2187 rbuf[4] = media_rotation_rate >> 8;
2188 rbuf[5] = media_rotation_rate;
2189 rbuf[7] = form_factor;
2194 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2196 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2199 rbuf[5] = 1 << 6; /* TPWS */
2205 * ata_scsiop_noop - Command handler that simply returns success.
2206 * @args: device IDENTIFY data / SCSI command of interest.
2207 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2209 * No operation. Simply returns success to caller, to indicate
2210 * that the caller should successfully complete this SCSI command.
2213 * spin_lock_irqsave(host lock)
2215 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
2222 * ata_msense_caching - Simulate MODE SENSE caching info page
2223 * @id: device IDENTIFY data
2224 * @buf: output buffer
2226 * Generate a caching info page, which conditionally indicates
2227 * write caching to the SCSI layer, depending on device
2233 static unsigned int ata_msense_caching(u16 *id, u8 *buf)
2235 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
2236 if (ata_id_wcache_enabled(id))
2237 buf[2] |= (1 << 2); /* write cache enable */
2238 if (!ata_id_rahead_enabled(id))
2239 buf[12] |= (1 << 5); /* disable read ahead */
2240 return sizeof(def_cache_mpage);
2244 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2245 * @buf: output buffer
2247 * Generate a generic MODE SENSE control mode page.
2252 static unsigned int ata_msense_ctl_mode(u8 *buf)
2254 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
2255 return sizeof(def_control_mpage);
2259 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2260 * @buf: output buffer
2262 * Generate a generic MODE SENSE r/w error recovery page.
2267 static unsigned int ata_msense_rw_recovery(u8 *buf)
2269 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
2270 return sizeof(def_rw_recovery_mpage);
2274 * We can turn this into a real blacklist if it's needed, for now just
2275 * blacklist any Maxtor BANC1G10 revision firmware
2277 static int ata_dev_supports_fua(u16 *id)
2279 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2283 if (!ata_id_has_fua(id))
2286 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2287 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2289 if (strcmp(model, "Maxtor"))
2291 if (strcmp(fw, "BANC1G10"))
2294 return 0; /* blacklisted */
2298 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2299 * @args: device IDENTIFY data / SCSI command of interest.
2300 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2302 * Simulate MODE SENSE commands. Assume this is invoked for direct
2303 * access devices (e.g. disks) only. There should be no block
2304 * descriptor for other device types.
2307 * spin_lock_irqsave(host lock)
2309 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2311 struct ata_device *dev = args->dev;
2312 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2313 const u8 sat_blk_desc[] = {
2314 0, 0, 0, 0, /* number of blocks: sat unspecified */
2316 0, 0x2, 0x0 /* block length: 512 bytes */
2319 unsigned int ebd, page_control, six_byte;
2324 six_byte = (scsicmd[0] == MODE_SENSE);
2325 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2327 * LLBA bit in msense(10) ignored (compliant)
2330 page_control = scsicmd[2] >> 6;
2331 switch (page_control) {
2332 case 0: /* current */
2333 break; /* supported */
2335 goto saving_not_supp;
2336 case 1: /* changeable */
2337 case 2: /* defaults */
2343 p += 4 + (ebd ? 8 : 0);
2345 p += 8 + (ebd ? 8 : 0);
2347 pg = scsicmd[2] & 0x3f;
2350 * No mode subpages supported (yet) but asking for _all_
2351 * subpages may be valid
2353 if (spg && (spg != ALL_SUB_MPAGES))
2357 case RW_RECOVERY_MPAGE:
2358 p += ata_msense_rw_recovery(p);
2362 p += ata_msense_caching(args->id, p);
2366 p += ata_msense_ctl_mode(p);
2370 p += ata_msense_rw_recovery(p);
2371 p += ata_msense_caching(args->id, p);
2372 p += ata_msense_ctl_mode(p);
2375 default: /* invalid page code */
2380 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2381 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2385 rbuf[0] = p - rbuf - 1;
2388 rbuf[3] = sizeof(sat_blk_desc);
2389 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2392 unsigned int output_len = p - rbuf - 2;
2394 rbuf[0] = output_len >> 8;
2395 rbuf[1] = output_len;
2398 rbuf[7] = sizeof(sat_blk_desc);
2399 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2405 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2406 /* "Invalid field in cbd" */
2410 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2411 /* "Saving parameters not supported" */
2416 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2417 * @args: device IDENTIFY data / SCSI command of interest.
2418 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2420 * Simulate READ CAPACITY commands.
2425 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2427 struct ata_device *dev = args->dev;
2428 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2429 u32 sector_size; /* physical sector size in bytes */
2433 sector_size = ata_id_logical_sector_size(dev->id);
2434 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2435 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2439 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2440 if (last_lba >= 0xffffffffULL)
2441 last_lba = 0xffffffff;
2443 /* sector count, 32-bit */
2444 rbuf[0] = last_lba >> (8 * 3);
2445 rbuf[1] = last_lba >> (8 * 2);
2446 rbuf[2] = last_lba >> (8 * 1);
2450 rbuf[4] = sector_size >> (8 * 3);
2451 rbuf[5] = sector_size >> (8 * 2);
2452 rbuf[6] = sector_size >> (8 * 1);
2453 rbuf[7] = sector_size;
2455 /* sector count, 64-bit */
2456 rbuf[0] = last_lba >> (8 * 7);
2457 rbuf[1] = last_lba >> (8 * 6);
2458 rbuf[2] = last_lba >> (8 * 5);
2459 rbuf[3] = last_lba >> (8 * 4);
2460 rbuf[4] = last_lba >> (8 * 3);
2461 rbuf[5] = last_lba >> (8 * 2);
2462 rbuf[6] = last_lba >> (8 * 1);
2466 rbuf[ 8] = sector_size >> (8 * 3);
2467 rbuf[ 9] = sector_size >> (8 * 2);
2468 rbuf[10] = sector_size >> (8 * 1);
2469 rbuf[11] = sector_size;
2472 rbuf[13] = log2_per_phys;
2473 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2474 rbuf[15] = lowest_aligned;
2476 if (ata_id_has_trim(args->id)) {
2477 rbuf[14] |= 0x80; /* TPE */
2479 if (ata_id_has_zero_after_trim(args->id))
2480 rbuf[14] |= 0x40; /* TPRZ */
2488 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2489 * @args: device IDENTIFY data / SCSI command of interest.
2490 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2492 * Simulate REPORT LUNS command.
2495 * spin_lock_irqsave(host lock)
2497 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2500 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2505 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2507 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2508 /* FIXME: not quite right; we don't want the
2509 * translation of taskfile registers into
2510 * a sense descriptors, since that's only
2511 * correct for ATA, not ATAPI
2513 ata_gen_passthru_sense(qc);
2516 qc->scsidone(qc->scsicmd);
2520 /* is it pointless to prefer PIO for "safety reasons"? */
2521 static inline int ata_pio_use_silly(struct ata_port *ap)
2523 return (ap->flags & ATA_FLAG_PIO_DMA);
2526 static void atapi_request_sense(struct ata_queued_cmd *qc)
2528 struct ata_port *ap = qc->ap;
2529 struct scsi_cmnd *cmd = qc->scsicmd;
2531 DPRINTK("ATAPI request sense\n");
2533 /* FIXME: is this needed? */
2534 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2536 #ifdef CONFIG_ATA_SFF
2537 if (ap->ops->sff_tf_read)
2538 ap->ops->sff_tf_read(ap, &qc->tf);
2541 /* fill these in, for the case where they are -not- overwritten */
2542 cmd->sense_buffer[0] = 0x70;
2543 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2547 /* setup sg table and init transfer direction */
2548 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2549 ata_sg_init(qc, &qc->sgent, 1);
2550 qc->dma_dir = DMA_FROM_DEVICE;
2552 memset(&qc->cdb, 0, qc->dev->cdb_len);
2553 qc->cdb[0] = REQUEST_SENSE;
2554 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2556 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2557 qc->tf.command = ATA_CMD_PACKET;
2559 if (ata_pio_use_silly(ap)) {
2560 qc->tf.protocol = ATAPI_PROT_DMA;
2561 qc->tf.feature |= ATAPI_PKT_DMA;
2563 qc->tf.protocol = ATAPI_PROT_PIO;
2564 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2567 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2569 qc->complete_fn = atapi_sense_complete;
2576 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2578 struct scsi_cmnd *cmd = qc->scsicmd;
2579 unsigned int err_mask = qc->err_mask;
2581 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2583 /* handle completion from new EH */
2584 if (unlikely(qc->ap->ops->error_handler &&
2585 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2587 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2588 /* FIXME: not quite right; we don't want the
2589 * translation of taskfile registers into a
2590 * sense descriptors, since that's only
2591 * correct for ATA, not ATAPI
2593 ata_gen_passthru_sense(qc);
2596 /* SCSI EH automatically locks door if sdev->locked is
2597 * set. Sometimes door lock request continues to
2598 * fail, for example, when no media is present. This
2599 * creates a loop - SCSI EH issues door lock which
2600 * fails and gets invoked again to acquire sense data
2601 * for the failed command.
2603 * If door lock fails, always clear sdev->locked to
2604 * avoid this infinite loop.
2606 * This may happen before SCSI scan is complete. Make
2607 * sure qc->dev->sdev isn't NULL before dereferencing.
2609 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2610 qc->dev->sdev->locked = 0;
2612 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2618 /* successful completion or old EH failure path */
2619 if (unlikely(err_mask & AC_ERR_DEV)) {
2620 cmd->result = SAM_STAT_CHECK_CONDITION;
2621 atapi_request_sense(qc);
2623 } else if (unlikely(err_mask)) {
2624 /* FIXME: not quite right; we don't want the
2625 * translation of taskfile registers into
2626 * a sense descriptors, since that's only
2627 * correct for ATA, not ATAPI
2629 ata_gen_passthru_sense(qc);
2631 u8 *scsicmd = cmd->cmnd;
2633 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2634 unsigned long flags;
2637 buf = ata_scsi_rbuf_get(cmd, true, &flags);
2639 /* ATAPI devices typically report zero for their SCSI version,
2640 * and sometimes deviate from the spec WRT response data
2641 * format. If SCSI version is reported as zero like normal,
2642 * then we make the following fixups: 1) Fake MMC-5 version,
2643 * to indicate to the Linux scsi midlayer this is a modern
2644 * device. 2) Ensure response data format / ATAPI information
2645 * are always correct.
2652 ata_scsi_rbuf_put(cmd, true, &flags);
2655 cmd->result = SAM_STAT_GOOD;
2662 * atapi_xlat - Initialize PACKET taskfile
2663 * @qc: command structure to be initialized
2666 * spin_lock_irqsave(host lock)
2669 * Zero on success, non-zero on failure.
2671 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2673 struct scsi_cmnd *scmd = qc->scsicmd;
2674 struct ata_device *dev = qc->dev;
2675 int nodata = (scmd->sc_data_direction == DMA_NONE);
2676 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2677 unsigned int nbytes;
2679 memset(qc->cdb, 0, dev->cdb_len);
2680 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2682 qc->complete_fn = atapi_qc_complete;
2684 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2685 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2686 qc->tf.flags |= ATA_TFLAG_WRITE;
2687 DPRINTK("direction: write\n");
2690 qc->tf.command = ATA_CMD_PACKET;
2691 ata_qc_set_pc_nbytes(qc);
2693 /* check whether ATAPI DMA is safe */
2694 if (!nodata && !using_pio && atapi_check_dma(qc))
2697 /* Some controller variants snoop this value for Packet
2698 * transfers to do state machine and FIFO management. Thus we
2699 * want to set it properly, and for DMA where it is
2700 * effectively meaningless.
2702 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2704 /* Most ATAPI devices which honor transfer chunk size don't
2705 * behave according to the spec when odd chunk size which
2706 * matches the transfer length is specified. If the number of
2707 * bytes to transfer is 2n+1. According to the spec, what
2708 * should happen is to indicate that 2n+1 is going to be
2709 * transferred and transfer 2n+2 bytes where the last byte is
2712 * In practice, this doesn't happen. ATAPI devices first
2713 * indicate and transfer 2n bytes and then indicate and
2714 * transfer 2 bytes where the last byte is padding.
2716 * This inconsistency confuses several controllers which
2717 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2718 * These controllers use actual number of transferred bytes to
2719 * update DMA poitner and transfer of 4n+2 bytes make those
2720 * controller push DMA pointer by 4n+4 bytes because SATA data
2721 * FISes are aligned to 4 bytes. This causes data corruption
2722 * and buffer overrun.
2724 * Always setting nbytes to even number solves this problem
2725 * because then ATAPI devices don't have to split data at 2n
2731 qc->tf.lbam = (nbytes & 0xFF);
2732 qc->tf.lbah = (nbytes >> 8);
2735 qc->tf.protocol = ATAPI_PROT_NODATA;
2737 qc->tf.protocol = ATAPI_PROT_PIO;
2740 qc->tf.protocol = ATAPI_PROT_DMA;
2741 qc->tf.feature |= ATAPI_PKT_DMA;
2743 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2744 (scmd->sc_data_direction != DMA_TO_DEVICE))
2745 /* some SATA bridges need us to indicate data xfer direction */
2746 qc->tf.feature |= ATAPI_DMADIR;
2750 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2751 as ATAPI tape drives don't get this right otherwise */
2755 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2757 if (!sata_pmp_attached(ap)) {
2758 if (likely(devno < ata_link_max_devices(&ap->link)))
2759 return &ap->link.device[devno];
2761 if (likely(devno < ap->nr_pmp_links))
2762 return &ap->pmp_link[devno].device[0];
2768 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2769 const struct scsi_device *scsidev)
2773 /* skip commands not addressed to targets we simulate */
2774 if (!sata_pmp_attached(ap)) {
2775 if (unlikely(scsidev->channel || scsidev->lun))
2777 devno = scsidev->id;
2779 if (unlikely(scsidev->id || scsidev->lun))
2781 devno = scsidev->channel;
2784 return ata_find_dev(ap, devno);
2788 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2789 * @ap: ATA port to which the device is attached
2790 * @scsidev: SCSI device from which we derive the ATA device
2792 * Given various information provided in struct scsi_cmnd,
2793 * map that onto an ATA bus, and using that mapping
2794 * determine which ata_device is associated with the
2795 * SCSI command to be sent.
2798 * spin_lock_irqsave(host lock)
2801 * Associated ATA device, or %NULL if not found.
2803 static struct ata_device *
2804 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2806 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2808 if (unlikely(!dev || !ata_dev_enabled(dev)))
2815 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2816 * @byte1: Byte 1 from pass-thru CDB.
2819 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2822 ata_scsi_map_proto(u8 byte1)
2824 switch((byte1 & 0x1e) >> 1) {
2825 case 3: /* Non-data */
2826 return ATA_PROT_NODATA;
2829 case 10: /* UDMA Data-in */
2830 case 11: /* UDMA Data-Out */
2831 return ATA_PROT_DMA;
2833 case 4: /* PIO Data-in */
2834 case 5: /* PIO Data-out */
2835 return ATA_PROT_PIO;
2837 case 0: /* Hard Reset */
2839 case 8: /* Device Diagnostic */
2840 case 9: /* Device Reset */
2841 case 7: /* DMA Queued */
2842 case 12: /* FPDMA */
2843 case 15: /* Return Response Info */
2844 default: /* Reserved */
2848 return ATA_PROT_UNKNOWN;
2852 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2853 * @qc: command structure to be initialized
2855 * Handles either 12 or 16-byte versions of the CDB.
2858 * Zero on success, non-zero on failure.
2860 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2862 struct ata_taskfile *tf = &(qc->tf);
2863 struct scsi_cmnd *scmd = qc->scsicmd;
2864 struct ata_device *dev = qc->dev;
2865 const u8 *cdb = scmd->cmnd;
2867 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2871 * 12 and 16 byte CDBs use different offsets to
2872 * provide the various register values.
2874 if (cdb[0] == ATA_16) {
2876 * 16-byte CDB - may contain extended commands.
2878 * If that is the case, copy the upper byte register values.
2880 if (cdb[1] & 0x01) {
2881 tf->hob_feature = cdb[3];
2882 tf->hob_nsect = cdb[5];
2883 tf->hob_lbal = cdb[7];
2884 tf->hob_lbam = cdb[9];
2885 tf->hob_lbah = cdb[11];
2886 tf->flags |= ATA_TFLAG_LBA48;
2888 tf->flags &= ~ATA_TFLAG_LBA48;
2891 * Always copy low byte, device and command registers.
2893 tf->feature = cdb[4];
2898 tf->device = cdb[13];
2899 tf->command = cdb[14];
2902 * 12-byte CDB - incapable of extended commands.
2904 tf->flags &= ~ATA_TFLAG_LBA48;
2906 tf->feature = cdb[3];
2911 tf->device = cdb[8];
2912 tf->command = cdb[9];
2915 /* enforce correct master/slave bit */
2916 tf->device = dev->devno ?
2917 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2919 switch (tf->command) {
2920 /* READ/WRITE LONG use a non-standard sect_size */
2921 case ATA_CMD_READ_LONG:
2922 case ATA_CMD_READ_LONG_ONCE:
2923 case ATA_CMD_WRITE_LONG:
2924 case ATA_CMD_WRITE_LONG_ONCE:
2925 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2927 qc->sect_size = scsi_bufflen(scmd);
2930 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2931 case ATA_CMD_CFA_WRITE_NE:
2932 case ATA_CMD_CFA_TRANS_SECT:
2933 case ATA_CMD_CFA_WRITE_MULT_NE:
2934 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2936 case ATA_CMD_READ_EXT:
2937 case ATA_CMD_READ_QUEUED:
2938 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2939 case ATA_CMD_FPDMA_READ:
2940 case ATA_CMD_READ_MULTI:
2941 case ATA_CMD_READ_MULTI_EXT:
2942 case ATA_CMD_PIO_READ:
2943 case ATA_CMD_PIO_READ_EXT:
2944 case ATA_CMD_READ_STREAM_DMA_EXT:
2945 case ATA_CMD_READ_STREAM_EXT:
2946 case ATA_CMD_VERIFY:
2947 case ATA_CMD_VERIFY_EXT:
2949 case ATA_CMD_WRITE_EXT:
2950 case ATA_CMD_WRITE_FUA_EXT:
2951 case ATA_CMD_WRITE_QUEUED:
2952 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
2953 case ATA_CMD_FPDMA_WRITE:
2954 case ATA_CMD_WRITE_MULTI:
2955 case ATA_CMD_WRITE_MULTI_EXT:
2956 case ATA_CMD_WRITE_MULTI_FUA_EXT:
2957 case ATA_CMD_PIO_WRITE:
2958 case ATA_CMD_PIO_WRITE_EXT:
2959 case ATA_CMD_WRITE_STREAM_DMA_EXT:
2960 case ATA_CMD_WRITE_STREAM_EXT:
2961 qc->sect_size = scmd->device->sector_size;
2964 /* Everything else uses 512 byte "sectors" */
2966 qc->sect_size = ATA_SECT_SIZE;
2970 * Set flags so that all registers will be written, pass on
2971 * write indication (used for PIO/DMA setup), result TF is
2972 * copied back and we don't whine too much about its failure.
2974 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2975 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2976 tf->flags |= ATA_TFLAG_WRITE;
2978 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2981 * Set transfer length.
2983 * TODO: find out if we need to do more here to
2984 * cover scatter/gather case.
2986 ata_qc_set_pc_nbytes(qc);
2988 /* We may not issue DMA commands if no DMA mode is set */
2989 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2992 /* sanity check for pio multi commands */
2993 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2996 if (is_multi_taskfile(tf)) {
2997 unsigned int multi_count = 1 << (cdb[1] >> 5);
2999 /* compare the passed through multi_count
3000 * with the cached multi_count of libata
3002 if (multi_count != dev->multi_count)
3003 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3008 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3009 * SET_FEATURES - XFER MODE must be preceded/succeeded
3010 * by an update to hardware-specific registers for each
3011 * controller (i.e. the reason for ->set_piomode(),
3012 * ->set_dmamode(), and ->post_set_mode() hooks).
3014 if (tf->command == ATA_CMD_SET_FEATURES &&
3015 tf->feature == SETFEATURES_XFER)
3019 * Filter TPM commands by default. These provide an
3020 * essentially uncontrolled encrypted "back door" between
3021 * applications and the disk. Set libata.allow_tpm=1 if you
3022 * have a real reason for wanting to use them. This ensures
3023 * that installed software cannot easily mess stuff up without
3024 * user intent. DVR type users will probably ship with this enabled
3025 * for movie content management.
3027 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3028 * for this and should do in future but that it is not sufficient as
3029 * DCS is an optional feature set. Thus we also do the software filter
3030 * so that we comply with the TC consortium stated goal that the user
3031 * can turn off TC features of their system.
3033 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
3039 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3040 /* "Invalid field in cdb" */
3044 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3046 struct ata_taskfile *tf = &qc->tf;
3047 struct scsi_cmnd *scmd = qc->scsicmd;
3048 struct ata_device *dev = qc->dev;
3049 const u8 *cdb = scmd->cmnd;
3055 /* we may not issue DMA commands if no DMA mode is set */
3056 if (unlikely(!dev->dma_mode))
3059 if (unlikely(scmd->cmd_len < 16))
3061 scsi_16_lba_len(cdb, &block, &n_block);
3063 /* for now we only support WRITE SAME with the unmap bit set */
3064 if (unlikely(!(cdb[1] & 0x8)))
3068 * WRITE SAME always has a sector sized buffer as payload, this
3069 * should never be a multiple entry S/G list.
3071 if (!scsi_sg_count(scmd))
3074 buf = page_address(sg_page(scsi_sglist(scmd)));
3075 size = ata_set_lba_range_entries(buf, 512, block, n_block);
3077 tf->protocol = ATA_PROT_DMA;
3078 tf->hob_feature = 0;
3079 tf->feature = ATA_DSM_TRIM;
3080 tf->hob_nsect = (size / 512) >> 8;
3081 tf->nsect = size / 512;
3082 tf->command = ATA_CMD_DSM;
3083 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3086 ata_qc_set_pc_nbytes(qc);
3091 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3092 /* "Invalid field in cdb" */
3097 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3099 * @cmd: SCSI command opcode to consider
3101 * Look up the SCSI command given, and determine whether the
3102 * SCSI command is to be translated or simulated.
3105 * Pointer to translation function if possible, %NULL if not.
3108 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3118 return ata_scsi_rw_xlat;
3121 return ata_scsi_write_same_xlat;
3123 case SYNCHRONIZE_CACHE:
3124 if (ata_try_flush_cache(dev))
3125 return ata_scsi_flush_xlat;
3130 return ata_scsi_verify_xlat;
3134 return ata_scsi_pass_thru;
3137 return ata_scsi_start_stop_xlat;
3144 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3145 * @ap: ATA port to which the command was being sent
3146 * @cmd: SCSI command to dump
3148 * Prints the contents of a SCSI command via printk().
3151 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3152 struct scsi_cmnd *cmd)
3155 struct scsi_device *scsidev = cmd->device;
3156 u8 *scsicmd = cmd->cmnd;
3158 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
3160 scsidev->channel, scsidev->id, scsidev->lun,
3161 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3162 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3167 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
3168 struct ata_device *dev)
3170 u8 scsi_op = scmd->cmnd[0];
3171 ata_xlat_func_t xlat_func;
3174 if (dev->class == ATA_DEV_ATA) {
3175 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3178 xlat_func = ata_get_xlat_func(dev, scsi_op);
3180 if (unlikely(!scmd->cmd_len))
3184 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3185 /* relay SCSI command to ATAPI device */
3186 int len = COMMAND_SIZE(scsi_op);
3187 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
3190 xlat_func = atapi_xlat;
3192 /* ATA_16 passthru, treat as an ATA command */
3193 if (unlikely(scmd->cmd_len > 16))
3196 xlat_func = ata_get_xlat_func(dev, scsi_op);
3201 rc = ata_scsi_translate(dev, scmd, xlat_func);
3203 ata_scsi_simulate(dev, scmd);
3208 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3209 scmd->cmd_len, scsi_op, dev->cdb_len);
3210 scmd->result = DID_ERROR << 16;
3211 scmd->scsi_done(scmd);
3216 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3217 * @shost: SCSI host of command to be sent
3218 * @cmd: SCSI command to be sent
3220 * In some cases, this function translates SCSI commands into
3221 * ATA taskfiles, and queues the taskfiles to be sent to
3222 * hardware. In other cases, this function simulates a
3223 * SCSI device by evaluating and responding to certain
3224 * SCSI commands. This creates the overall effect of
3225 * ATA and ATAPI devices appearing as SCSI devices.
3231 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3234 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
3236 struct ata_port *ap;
3237 struct ata_device *dev;
3238 struct scsi_device *scsidev = cmd->device;
3240 unsigned long irq_flags;
3242 ap = ata_shost_to_port(shost);
3244 spin_lock_irqsave(ap->lock, irq_flags);
3246 ata_scsi_dump_cdb(ap, cmd);
3248 dev = ata_scsi_find_dev(ap, scsidev);
3250 rc = __ata_scsi_queuecmd(cmd, dev);
3252 cmd->result = (DID_BAD_TARGET << 16);
3253 cmd->scsi_done(cmd);
3256 spin_unlock_irqrestore(ap->lock, irq_flags);
3262 * ata_scsi_simulate - simulate SCSI command on ATA device
3263 * @dev: the target device
3264 * @cmd: SCSI command being sent to device.
3266 * Interprets and directly executes a select list of SCSI commands
3267 * that can be handled internally.
3270 * spin_lock_irqsave(host lock)
3273 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
3275 struct ata_scsi_args args;
3276 const u8 *scsicmd = cmd->cmnd;
3282 args.done = cmd->scsi_done;
3284 switch(scsicmd[0]) {
3285 /* TODO: worth improving? */
3287 ata_scsi_invalid_field(cmd);
3291 if (scsicmd[1] & 2) /* is CmdDt set? */
3292 ata_scsi_invalid_field(cmd);
3293 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3294 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3295 else switch (scsicmd[2]) {
3297 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
3300 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
3303 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
3306 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3309 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3312 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3315 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
3318 ata_scsi_invalid_field(cmd);
3325 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3328 case MODE_SELECT: /* unconditionally return */
3329 case MODE_SELECT_10: /* bad-field-in-cdb */
3330 ata_scsi_invalid_field(cmd);
3334 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3337 case SERVICE_ACTION_IN:
3338 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3339 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3341 ata_scsi_invalid_field(cmd);
3345 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3349 ata_scsi_set_sense(cmd, 0, 0, 0);
3350 cmd->result = (DRIVER_SENSE << 24);
3351 cmd->scsi_done(cmd);
3354 /* if we reach this, then writeback caching is disabled,
3355 * turning this into a no-op.
3357 case SYNCHRONIZE_CACHE:
3360 /* no-op's, complete with success */
3364 case TEST_UNIT_READY:
3365 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3368 case SEND_DIAGNOSTIC:
3369 tmp8 = scsicmd[1] & ~(1 << 3);
3370 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3371 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3373 ata_scsi_invalid_field(cmd);
3376 /* all other commands */
3378 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3379 /* "Invalid command operation code" */
3380 cmd->scsi_done(cmd);
3385 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3389 for (i = 0; i < host->n_ports; i++) {
3390 struct ata_port *ap = host->ports[i];
3391 struct Scsi_Host *shost;
3394 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3398 *(struct ata_port **)&shost->hostdata[0] = ap;
3399 ap->scsi_host = shost;
3401 shost->transportt = ata_scsi_transport_template;
3402 shost->unique_id = ap->print_id;
3405 shost->max_channel = 1;
3406 shost->max_cmd_len = 16;
3408 /* Schedule policy is determined by ->qc_defer()
3409 * callback and it needs to see every deferred qc.
3410 * Set host_blocked to 1 to prevent SCSI midlayer from
3411 * automatically deferring requests.
3413 shost->max_host_blocked = 1;
3415 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3423 scsi_host_put(host->ports[i]->scsi_host);
3426 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3428 scsi_remove_host(shost);
3429 scsi_host_put(shost);
3434 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3437 struct ata_device *last_failed_dev = NULL;
3438 struct ata_link *link;
3439 struct ata_device *dev;
3442 ata_for_each_link(link, ap, EDGE) {
3443 ata_for_each_dev(dev, link, ENABLED) {
3444 struct scsi_device *sdev;
3445 int channel = 0, id = 0;
3450 if (ata_is_host_link(link))
3453 channel = link->pmp;
3455 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3457 if (!IS_ERR(sdev)) {
3459 scsi_device_put(sdev);
3466 /* If we scanned while EH was in progress or allocation
3467 * failure occurred, scan would have failed silently. Check
3468 * whether all devices are attached.
3470 ata_for_each_link(link, ap, EDGE) {
3471 ata_for_each_dev(dev, link, ENABLED) {
3480 /* we're missing some SCSI devices */
3482 /* If caller requested synchrnous scan && we've made
3483 * any progress, sleep briefly and repeat.
3485 if (dev != last_failed_dev) {
3487 last_failed_dev = dev;
3491 /* We might be failing to detect boot device, give it
3492 * a few more chances.
3500 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
3503 queue_delayed_work(system_long_wq, &ap->hotplug_task,
3504 round_jiffies_relative(HZ));
3508 * ata_scsi_offline_dev - offline attached SCSI device
3509 * @dev: ATA device to offline attached SCSI device for
3511 * This function is called from ata_eh_hotplug() and responsible
3512 * for taking the SCSI device attached to @dev offline. This
3513 * function is called with host lock which protects dev->sdev
3517 * spin_lock_irqsave(host lock)
3520 * 1 if attached SCSI device exists, 0 otherwise.
3522 int ata_scsi_offline_dev(struct ata_device *dev)
3525 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3532 * ata_scsi_remove_dev - remove attached SCSI device
3533 * @dev: ATA device to remove attached SCSI device for
3535 * This function is called from ata_eh_scsi_hotplug() and
3536 * responsible for removing the SCSI device attached to @dev.
3539 * Kernel thread context (may sleep).
3541 static void ata_scsi_remove_dev(struct ata_device *dev)
3543 struct ata_port *ap = dev->link->ap;
3544 struct scsi_device *sdev;
3545 unsigned long flags;
3547 /* Alas, we need to grab scan_mutex to ensure SCSI device
3548 * state doesn't change underneath us and thus
3549 * scsi_device_get() always succeeds. The mutex locking can
3550 * be removed if there is __scsi_device_get() interface which
3551 * increments reference counts regardless of device state.
3553 mutex_lock(&ap->scsi_host->scan_mutex);
3554 spin_lock_irqsave(ap->lock, flags);
3556 /* clearing dev->sdev is protected by host lock */
3561 /* If user initiated unplug races with us, sdev can go
3562 * away underneath us after the host lock and
3563 * scan_mutex are released. Hold onto it.
3565 if (scsi_device_get(sdev) == 0) {
3566 /* The following ensures the attached sdev is
3567 * offline on return from ata_scsi_offline_dev()
3568 * regardless it wins or loses the race
3569 * against this function.
3571 scsi_device_set_state(sdev, SDEV_OFFLINE);
3578 spin_unlock_irqrestore(ap->lock, flags);
3579 mutex_unlock(&ap->scsi_host->scan_mutex);
3582 ata_dev_info(dev, "detaching (SCSI %s)\n",
3583 dev_name(&sdev->sdev_gendev));
3585 scsi_remove_device(sdev);
3586 scsi_device_put(sdev);
3590 static void ata_scsi_handle_link_detach(struct ata_link *link)
3592 struct ata_port *ap = link->ap;
3593 struct ata_device *dev;
3595 ata_for_each_dev(dev, link, ALL) {
3596 unsigned long flags;
3598 if (!(dev->flags & ATA_DFLAG_DETACHED))
3601 spin_lock_irqsave(ap->lock, flags);
3602 dev->flags &= ~ATA_DFLAG_DETACHED;
3603 spin_unlock_irqrestore(ap->lock, flags);
3605 ata_scsi_remove_dev(dev);
3610 * ata_scsi_media_change_notify - send media change event
3611 * @dev: Pointer to the disk device with media change event
3613 * Tell the block layer to send a media change notification
3617 * spin_lock_irqsave(host lock)
3619 void ata_scsi_media_change_notify(struct ata_device *dev)
3622 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3627 * ata_scsi_hotplug - SCSI part of hotplug
3628 * @work: Pointer to ATA port to perform SCSI hotplug on
3630 * Perform SCSI part of hotplug. It's executed from a separate
3631 * workqueue after EH completes. This is necessary because SCSI
3632 * hot plugging requires working EH and hot unplugging is
3633 * synchronized with hot plugging with a mutex.
3636 * Kernel thread context (may sleep).
3638 void ata_scsi_hotplug(struct work_struct *work)
3640 struct ata_port *ap =
3641 container_of(work, struct ata_port, hotplug_task.work);
3644 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3645 DPRINTK("ENTER/EXIT - unloading\n");
3650 mutex_lock(&ap->scsi_scan_mutex);
3652 /* Unplug detached devices. We cannot use link iterator here
3653 * because PMP links have to be scanned even if PMP is
3654 * currently not attached. Iterate manually.
3656 ata_scsi_handle_link_detach(&ap->link);
3658 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3659 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3661 /* scan for new ones */
3662 ata_scsi_scan_host(ap, 0);
3664 mutex_unlock(&ap->scsi_scan_mutex);
3669 * ata_scsi_user_scan - indication for user-initiated bus scan
3670 * @shost: SCSI host to scan
3671 * @channel: Channel to scan
3675 * This function is called when user explicitly requests bus
3676 * scan. Set probe pending flag and invoke EH.
3679 * SCSI layer (we don't care)
3684 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3685 unsigned int id, unsigned int lun)
3687 struct ata_port *ap = ata_shost_to_port(shost);
3688 unsigned long flags;
3691 if (!ap->ops->error_handler)
3694 if (lun != SCAN_WILD_CARD && lun)
3697 if (!sata_pmp_attached(ap)) {
3698 if (channel != SCAN_WILD_CARD && channel)
3702 if (id != SCAN_WILD_CARD && id)
3707 spin_lock_irqsave(ap->lock, flags);
3709 if (devno == SCAN_WILD_CARD) {
3710 struct ata_link *link;
3712 ata_for_each_link(link, ap, EDGE) {
3713 struct ata_eh_info *ehi = &link->eh_info;
3714 ehi->probe_mask |= ATA_ALL_DEVICES;
3715 ehi->action |= ATA_EH_RESET;
3718 struct ata_device *dev = ata_find_dev(ap, devno);
3721 struct ata_eh_info *ehi = &dev->link->eh_info;
3722 ehi->probe_mask |= 1 << dev->devno;
3723 ehi->action |= ATA_EH_RESET;
3729 ata_port_schedule_eh(ap);
3730 spin_unlock_irqrestore(ap->lock, flags);
3731 ata_port_wait_eh(ap);
3733 spin_unlock_irqrestore(ap->lock, flags);
3739 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3740 * @work: Pointer to ATA port to perform scsi_rescan_device()
3742 * After ATA pass thru (SAT) commands are executed successfully,
3743 * libata need to propagate the changes to SCSI layer.
3746 * Kernel thread context (may sleep).
3748 void ata_scsi_dev_rescan(struct work_struct *work)
3750 struct ata_port *ap =
3751 container_of(work, struct ata_port, scsi_rescan_task);
3752 struct ata_link *link;
3753 struct ata_device *dev;
3754 unsigned long flags;
3756 mutex_lock(&ap->scsi_scan_mutex);
3757 spin_lock_irqsave(ap->lock, flags);
3759 ata_for_each_link(link, ap, EDGE) {
3760 ata_for_each_dev(dev, link, ENABLED) {
3761 struct scsi_device *sdev = dev->sdev;
3765 if (scsi_device_get(sdev))
3768 spin_unlock_irqrestore(ap->lock, flags);
3769 scsi_rescan_device(&(sdev->sdev_gendev));
3770 scsi_device_put(sdev);
3771 spin_lock_irqsave(ap->lock, flags);
3775 spin_unlock_irqrestore(ap->lock, flags);
3776 mutex_unlock(&ap->scsi_scan_mutex);
3780 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3781 * @host: ATA host container for all SAS ports
3782 * @port_info: Information from low-level host driver
3783 * @shost: SCSI host that the scsi device is attached to
3786 * PCI/etc. bus probe sem.
3789 * ata_port pointer on success / NULL on failure.
3792 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3793 struct ata_port_info *port_info,
3794 struct Scsi_Host *shost)
3796 struct ata_port *ap;
3798 ap = ata_port_alloc(host);
3803 ap->lock = &host->lock;
3804 ap->pio_mask = port_info->pio_mask;
3805 ap->mwdma_mask = port_info->mwdma_mask;
3806 ap->udma_mask = port_info->udma_mask;
3807 ap->flags |= port_info->flags;
3808 ap->ops = port_info->port_ops;
3809 ap->cbl = ATA_CBL_SATA;
3813 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3816 * ata_sas_port_start - Set port up for dma.
3817 * @ap: Port to initialize
3819 * Called just after data structures for each port are
3822 * May be used as the port_start() entry in ata_port_operations.
3825 * Inherited from caller.
3827 int ata_sas_port_start(struct ata_port *ap)
3830 * the port is marked as frozen at allocation time, but if we don't
3831 * have new eh, we won't thaw it
3833 if (!ap->ops->error_handler)
3834 ap->pflags &= ~ATA_PFLAG_FROZEN;
3837 EXPORT_SYMBOL_GPL(ata_sas_port_start);
3840 * ata_port_stop - Undo ata_sas_port_start()
3841 * @ap: Port to shut down
3843 * May be used as the port_stop() entry in ata_port_operations.
3846 * Inherited from caller.
3849 void ata_sas_port_stop(struct ata_port *ap)
3852 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3855 * ata_sas_port_init - Initialize a SATA device
3856 * @ap: SATA port to initialize
3859 * PCI/etc. bus probe sem.
3862 * Zero on success, non-zero on error.
3865 int ata_sas_port_init(struct ata_port *ap)
3867 int rc = ap->ops->port_start(ap);
3870 ap->print_id = ata_print_id++;
3871 rc = ata_port_probe(ap);
3876 EXPORT_SYMBOL_GPL(ata_sas_port_init);
3879 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3880 * @ap: SATA port to destroy
3884 void ata_sas_port_destroy(struct ata_port *ap)
3886 if (ap->ops->port_stop)
3887 ap->ops->port_stop(ap);
3890 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3893 * ata_sas_slave_configure - Default slave_config routine for libata devices
3894 * @sdev: SCSI device to configure
3895 * @ap: ATA port to which SCSI device is attached
3901 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3903 ata_scsi_sdev_config(sdev);
3904 ata_scsi_dev_config(sdev, ap->link.device);
3907 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3910 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3911 * @cmd: SCSI command to be sent
3912 * @ap: ATA port to which the command is being sent
3915 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3919 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
3923 ata_scsi_dump_cdb(ap, cmd);
3925 if (likely(ata_dev_enabled(ap->link.device)))
3926 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
3928 cmd->result = (DID_BAD_TARGET << 16);
3929 cmd->scsi_done(cmd);
3933 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);