2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/slab.h>
37 #include <linux/kernel.h>
38 #include <linux/blkdev.h>
39 #include <linux/spinlock.h>
40 #include <scsi/scsi.h>
41 #include <scsi/scsi_host.h>
42 #include <scsi/scsi_cmnd.h>
43 #include <scsi/scsi_eh.h>
44 #include <scsi/scsi_device.h>
45 #include <scsi/scsi_tcq.h>
46 #include <scsi/scsi_transport.h>
47 #include <linux/libata.h>
48 #include <linux/hdreg.h>
49 #include <linux/uaccess.h>
50 #include <linux/suspend.h>
51 #include <asm/unaligned.h>
54 #include "libata-transport.h"
56 #define SECTOR_SIZE 512
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 struct {
110 } link_pm_policy[] = {
111 { NOT_AVAILABLE, "max_performance" },
112 { MIN_POWER, "min_power" },
113 { MAX_PERFORMANCE, "max_performance" },
114 { MEDIUM_POWER, "medium_power" },
117 static const char *ata_scsi_lpm_get(enum link_pm policy)
121 for (i = 0; i < ARRAY_SIZE(link_pm_policy); i++)
122 if (link_pm_policy[i].value == policy)
123 return link_pm_policy[i].name;
128 static ssize_t ata_scsi_lpm_put(struct device *dev,
129 struct device_attribute *attr,
130 const char *buf, size_t count)
132 struct Scsi_Host *shost = class_to_shost(dev);
133 struct ata_port *ap = ata_shost_to_port(shost);
134 enum link_pm policy = 0;
138 * we are skipping array location 0 on purpose - this
139 * is because a value of NOT_AVAILABLE is displayed
140 * to the user as max_performance, but when the user
141 * writes "max_performance", they actually want the
142 * value to match MAX_PERFORMANCE.
144 for (i = 1; i < ARRAY_SIZE(link_pm_policy); i++) {
145 const int len = strlen(link_pm_policy[i].name);
146 if (strncmp(link_pm_policy[i].name, buf, len) == 0) {
147 policy = link_pm_policy[i].value;
154 ata_lpm_schedule(ap, policy);
159 ata_scsi_lpm_show(struct device *dev, struct device_attribute *attr, char *buf)
161 struct Scsi_Host *shost = class_to_shost(dev);
162 struct ata_port *ap = ata_shost_to_port(shost);
164 ata_scsi_lpm_get(ap->pm_policy);
169 return snprintf(buf, 23, "%s\n", policy);
171 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
172 ata_scsi_lpm_show, ata_scsi_lpm_put);
173 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
175 static ssize_t ata_scsi_park_show(struct device *device,
176 struct device_attribute *attr, char *buf)
178 struct scsi_device *sdev = to_scsi_device(device);
180 struct ata_link *link;
181 struct ata_device *dev;
182 unsigned long flags, now;
183 unsigned int uninitialized_var(msecs);
186 ap = ata_shost_to_port(sdev->host);
188 spin_lock_irqsave(ap->lock, flags);
189 dev = ata_scsi_find_dev(ap, sdev);
194 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
201 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
202 link->eh_context.unloaded_mask & (1 << dev->devno) &&
203 time_after(dev->unpark_deadline, now))
204 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
209 spin_unlock_irq(ap->lock);
211 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
214 static ssize_t ata_scsi_park_store(struct device *device,
215 struct device_attribute *attr,
216 const char *buf, size_t len)
218 struct scsi_device *sdev = to_scsi_device(device);
220 struct ata_device *dev;
225 rc = strict_strtol(buf, 10, &input);
226 if (rc || input < -2)
228 if (input > ATA_TMOUT_MAX_PARK) {
230 input = ATA_TMOUT_MAX_PARK;
233 ap = ata_shost_to_port(sdev->host);
235 spin_lock_irqsave(ap->lock, flags);
236 dev = ata_scsi_find_dev(ap, sdev);
237 if (unlikely(!dev)) {
241 if (dev->class != ATA_DEV_ATA) {
247 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
252 dev->unpark_deadline = ata_deadline(jiffies, input);
253 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
254 ata_port_schedule_eh(ap);
255 complete(&ap->park_req_pending);
259 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
262 dev->flags |= ATA_DFLAG_NO_UNLOAD;
267 spin_unlock_irqrestore(ap->lock, flags);
269 return rc ? rc : len;
271 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
272 ata_scsi_park_show, ata_scsi_park_store);
273 EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
275 static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
277 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
279 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
283 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
284 const char *buf, size_t count)
286 struct Scsi_Host *shost = class_to_shost(dev);
287 struct ata_port *ap = ata_shost_to_port(shost);
288 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
289 return ap->ops->em_store(ap, buf, count);
294 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
297 struct Scsi_Host *shost = class_to_shost(dev);
298 struct ata_port *ap = ata_shost_to_port(shost);
300 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
301 return ap->ops->em_show(ap, buf);
304 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
305 ata_scsi_em_message_show, ata_scsi_em_message_store);
306 EXPORT_SYMBOL_GPL(dev_attr_em_message);
309 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
312 struct Scsi_Host *shost = class_to_shost(dev);
313 struct ata_port *ap = ata_shost_to_port(shost);
315 return snprintf(buf, 23, "%d\n", ap->em_message_type);
317 DEVICE_ATTR(em_message_type, S_IRUGO,
318 ata_scsi_em_message_type_show, NULL);
319 EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
322 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
325 struct scsi_device *sdev = to_scsi_device(dev);
326 struct ata_port *ap = ata_shost_to_port(sdev->host);
327 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
329 if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY))
330 return ap->ops->sw_activity_show(atadev, buf);
335 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
336 const char *buf, size_t count)
338 struct scsi_device *sdev = to_scsi_device(dev);
339 struct ata_port *ap = ata_shost_to_port(sdev->host);
340 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
341 enum sw_activity val;
344 if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
345 val = simple_strtoul(buf, NULL, 0);
347 case OFF: case BLINK_ON: case BLINK_OFF:
348 rc = ap->ops->sw_activity_store(atadev, val);
357 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
358 ata_scsi_activity_store);
359 EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
361 struct device_attribute *ata_common_sdev_attrs[] = {
362 &dev_attr_unload_heads,
365 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
367 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
368 void (*done)(struct scsi_cmnd *))
370 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
371 /* "Invalid field in cbd" */
376 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
377 * @sdev: SCSI device for which BIOS geometry is to be determined
378 * @bdev: block device associated with @sdev
379 * @capacity: capacity of SCSI device
380 * @geom: location to which geometry will be output
382 * Generic bios head/sector/cylinder calculator
383 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
384 * mapping. Some situations may arise where the disk is not
385 * bootable if this is not used.
388 * Defined by the SCSI layer. We don't really care.
393 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
394 sector_t capacity, int geom[])
398 sector_div(capacity, 255*63);
405 * ata_scsi_unlock_native_capacity - unlock native capacity
406 * @sdev: SCSI device to adjust device capacity for
408 * This function is called if a partition on @sdev extends beyond
409 * the end of the device. It requests EH to unlock HPA.
412 * Defined by the SCSI layer. Might sleep.
414 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
416 struct ata_port *ap = ata_shost_to_port(sdev->host);
417 struct ata_device *dev;
420 spin_lock_irqsave(ap->lock, flags);
422 dev = ata_scsi_find_dev(ap, sdev);
423 if (dev && dev->n_sectors < dev->n_native_sectors) {
424 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
425 dev->link->eh_info.action |= ATA_EH_RESET;
426 ata_port_schedule_eh(ap);
429 spin_unlock_irqrestore(ap->lock, flags);
430 ata_port_wait_eh(ap);
434 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
436 * @sdev: SCSI device to get identify data for
437 * @arg: User buffer area for identify data
440 * Defined by the SCSI layer. We don't really care.
443 * Zero on success, negative errno on error.
445 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
448 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
449 u16 __user *dst = arg;
455 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
458 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
459 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
462 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
463 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
466 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
467 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
474 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
475 * @scsidev: Device to which we are issuing command
476 * @arg: User provided data for issuing command
479 * Defined by the SCSI layer. We don't really care.
482 * Zero on success, negative errno on error.
484 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
487 u8 scsi_cmd[MAX_COMMAND_SIZE];
488 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
490 enum dma_data_direction data_dir;
496 if (copy_from_user(args, arg, sizeof(args)))
499 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
503 memset(scsi_cmd, 0, sizeof(scsi_cmd));
506 argsize = SECTOR_SIZE * args[3];
507 argbuf = kmalloc(argsize, GFP_KERNEL);
508 if (argbuf == NULL) {
513 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
514 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
515 block count in sector count field */
516 data_dir = DMA_FROM_DEVICE;
518 scsi_cmd[1] = (3 << 1); /* Non-data */
519 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
523 scsi_cmd[0] = ATA_16;
525 scsi_cmd[4] = args[2];
526 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
527 scsi_cmd[6] = args[3];
528 scsi_cmd[8] = args[1];
532 scsi_cmd[6] = args[1];
534 scsi_cmd[14] = args[0];
536 /* Good values for timeout and retries? Values below
537 from scsi_ioctl_send_command() for default case... */
538 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
539 sensebuf, (10*HZ), 5, 0, NULL);
541 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
542 u8 *desc = sensebuf + 8;
543 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
545 /* If we set cc then ATA pass-through will cause a
546 * check condition even if no error. Filter that. */
547 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
548 struct scsi_sense_hdr sshdr;
549 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
551 if (sshdr.sense_key == 0 &&
552 sshdr.asc == 0 && sshdr.ascq == 0)
553 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
556 /* Send userspace a few ATA registers (same as drivers/ide) */
557 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
558 desc[0] == 0x09) { /* code is "ATA Descriptor" */
559 args[0] = desc[13]; /* status */
560 args[1] = desc[3]; /* error */
561 args[2] = desc[5]; /* sector count (0:7) */
562 if (copy_to_user(arg, args, sizeof(args)))
574 && copy_to_user(arg + sizeof(args), argbuf, argsize))
583 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
584 * @scsidev: Device to which we are issuing command
585 * @arg: User provided data for issuing command
588 * Defined by the SCSI layer. We don't really care.
591 * Zero on success, negative errno on error.
593 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
596 u8 scsi_cmd[MAX_COMMAND_SIZE];
597 u8 args[7], *sensebuf = NULL;
603 if (copy_from_user(args, arg, sizeof(args)))
606 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
610 memset(scsi_cmd, 0, sizeof(scsi_cmd));
611 scsi_cmd[0] = ATA_16;
612 scsi_cmd[1] = (3 << 1); /* Non-data */
613 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
614 scsi_cmd[4] = args[1];
615 scsi_cmd[6] = args[2];
616 scsi_cmd[8] = args[3];
617 scsi_cmd[10] = args[4];
618 scsi_cmd[12] = args[5];
619 scsi_cmd[13] = args[6] & 0x4f;
620 scsi_cmd[14] = args[0];
622 /* Good values for timeout and retries? Values below
623 from scsi_ioctl_send_command() for default case... */
624 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
625 sensebuf, (10*HZ), 5, 0, NULL);
627 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
628 u8 *desc = sensebuf + 8;
629 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
631 /* If we set cc then ATA pass-through will cause a
632 * check condition even if no error. Filter that. */
633 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
634 struct scsi_sense_hdr sshdr;
635 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
637 if (sshdr.sense_key == 0 &&
638 sshdr.asc == 0 && sshdr.ascq == 0)
639 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
642 /* Send userspace ATA registers */
643 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
644 desc[0] == 0x09) {/* code is "ATA Descriptor" */
645 args[0] = desc[13]; /* status */
646 args[1] = desc[3]; /* error */
647 args[2] = desc[5]; /* sector count (0:7) */
648 args[3] = desc[7]; /* lbal */
649 args[4] = desc[9]; /* lbam */
650 args[5] = desc[11]; /* lbah */
651 args[6] = desc[12]; /* select */
652 if (copy_to_user(arg, args, sizeof(args)))
667 static int ata_ioc32(struct ata_port *ap)
669 if (ap->flags & ATA_FLAG_PIO_DMA)
671 if (ap->pflags & ATA_PFLAG_PIO32)
676 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
677 int cmd, void __user *arg)
679 int val = -EINVAL, rc = -EINVAL;
683 case ATA_IOC_GET_IO32:
684 spin_lock_irqsave(ap->lock, flags);
686 spin_unlock_irqrestore(ap->lock, flags);
687 if (copy_to_user(arg, &val, 1))
691 case ATA_IOC_SET_IO32:
692 val = (unsigned long) arg;
694 spin_lock_irqsave(ap->lock, flags);
695 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
697 ap->pflags |= ATA_PFLAG_PIO32;
699 ap->pflags &= ~ATA_PFLAG_PIO32;
701 if (val != ata_ioc32(ap))
704 spin_unlock_irqrestore(ap->lock, flags);
707 case HDIO_GET_IDENTITY:
708 return ata_get_identity(ap, scsidev, arg);
711 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
713 return ata_cmd_ioctl(scsidev, arg);
715 case HDIO_DRIVE_TASK:
716 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
718 return ata_task_ioctl(scsidev, arg);
727 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
729 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
731 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
734 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
737 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
738 * @dev: ATA device to which the new command is attached
739 * @cmd: SCSI command that originated this ATA command
740 * @done: SCSI command completion function
742 * Obtain a reference to an unused ata_queued_cmd structure,
743 * which is the basic libata structure representing a single
744 * ATA command sent to the hardware.
746 * If a command was available, fill in the SCSI-specific
747 * portions of the structure with information on the
751 * spin_lock_irqsave(host lock)
754 * Command allocated, or %NULL if none available.
756 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
757 struct scsi_cmnd *cmd,
758 void (*done)(struct scsi_cmnd *))
760 struct ata_queued_cmd *qc;
762 qc = ata_qc_new_init(dev);
767 qc->sg = scsi_sglist(cmd);
768 qc->n_elem = scsi_sg_count(cmd);
770 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
777 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
779 struct scsi_cmnd *scmd = qc->scsicmd;
781 qc->extrabytes = scmd->request->extra_len;
782 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
786 * ata_dump_status - user friendly display of error info
787 * @id: id of the port in question
788 * @tf: ptr to filled out taskfile
790 * Decode and dump the ATA error/status registers for the user so
791 * that they have some idea what really happened at the non
792 * make-believe layer.
795 * inherited from caller
797 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
799 u8 stat = tf->command, err = tf->feature;
801 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
802 if (stat & ATA_BUSY) {
803 printk("Busy }\n"); /* Data is not valid in this case */
805 if (stat & 0x40) printk("DriveReady ");
806 if (stat & 0x20) printk("DeviceFault ");
807 if (stat & 0x10) printk("SeekComplete ");
808 if (stat & 0x08) printk("DataRequest ");
809 if (stat & 0x04) printk("CorrectedError ");
810 if (stat & 0x02) printk("Index ");
811 if (stat & 0x01) printk("Error ");
815 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
816 if (err & 0x04) printk("DriveStatusError ");
818 if (err & 0x04) printk("BadCRC ");
819 else printk("Sector ");
821 if (err & 0x40) printk("UncorrectableError ");
822 if (err & 0x10) printk("SectorIdNotFound ");
823 if (err & 0x02) printk("TrackZeroNotFound ");
824 if (err & 0x01) printk("AddrMarkNotFound ");
831 * ata_to_sense_error - convert ATA error to SCSI error
832 * @id: ATA device number
833 * @drv_stat: value contained in ATA status register
834 * @drv_err: value contained in ATA error register
835 * @sk: the sense key we'll fill out
836 * @asc: the additional sense code we'll fill out
837 * @ascq: the additional sense code qualifier we'll fill out
838 * @verbose: be verbose
840 * Converts an ATA error into a SCSI error. Fill out pointers to
841 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
842 * format sense blocks.
845 * spin_lock_irqsave(host lock)
847 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
848 u8 *asc, u8 *ascq, int verbose)
852 /* Based on the 3ware driver translation table */
853 static const unsigned char sense_table[][4] = {
855 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
857 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
859 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
860 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
861 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
862 /* MC|ID|ABRT|TRK0|MARK */
863 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
865 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
866 /* Bad address mark */
867 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
869 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
871 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
872 /* Media change request */
873 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
875 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
877 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
879 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
880 /* BBD - block marked bad */
881 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
882 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
884 static const unsigned char stat_table[][4] = {
885 /* Must be first because BUSY means no other bits valid */
886 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
887 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
888 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
889 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
890 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
894 * Is this an error we can process/parse
896 if (drv_stat & ATA_BUSY) {
897 drv_err = 0; /* Ignore the err bits, they're invalid */
901 /* Look for drv_err */
902 for (i = 0; sense_table[i][0] != 0xFF; i++) {
903 /* Look for best matches first */
904 if ((sense_table[i][0] & drv_err) ==
906 *sk = sense_table[i][1];
907 *asc = sense_table[i][2];
908 *ascq = sense_table[i][3];
912 /* No immediate match */
914 printk(KERN_WARNING "ata%u: no sense translation for "
915 "error 0x%02x\n", id, drv_err);
918 /* Fall back to interpreting status bits */
919 for (i = 0; stat_table[i][0] != 0xFF; i++) {
920 if (stat_table[i][0] & drv_stat) {
921 *sk = stat_table[i][1];
922 *asc = stat_table[i][2];
923 *ascq = stat_table[i][3];
927 /* No error? Undecoded? */
929 printk(KERN_WARNING "ata%u: no sense translation for "
930 "status: 0x%02x\n", id, drv_stat);
932 /* We need a sensible error return here, which is tricky, and one
933 that won't cause people to do things like return a disk wrongly */
934 *sk = ABORTED_COMMAND;
940 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
941 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
942 id, drv_stat, drv_err, *sk, *asc, *ascq);
947 * ata_gen_passthru_sense - Generate check condition sense block.
948 * @qc: Command that completed.
950 * This function is specific to the ATA descriptor format sense
951 * block specified for the ATA pass through commands. Regardless
952 * of whether the command errored or not, return a sense
953 * block. Copy all controller registers into the sense
954 * block. Clear sense key, ASC & ASCQ if there is no error.
959 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
961 struct scsi_cmnd *cmd = qc->scsicmd;
962 struct ata_taskfile *tf = &qc->result_tf;
963 unsigned char *sb = cmd->sense_buffer;
964 unsigned char *desc = sb + 8;
965 int verbose = qc->ap->ops->error_handler == NULL;
967 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
969 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
972 * Use ata_to_sense_error() to map status register bits
973 * onto sense key, asc & ascq.
976 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
977 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
978 &sb[1], &sb[2], &sb[3], verbose);
983 * Sense data is current and format is descriptor.
989 /* set length of additional sense data */
994 * Copy registers into sense buffer.
997 desc[3] = tf->feature; /* == error reg */
1001 desc[11] = tf->lbah;
1002 desc[12] = tf->device;
1003 desc[13] = tf->command; /* == status reg */
1006 * Fill in Extend bit, and the high order bytes
1009 if (tf->flags & ATA_TFLAG_LBA48) {
1011 desc[4] = tf->hob_nsect;
1012 desc[6] = tf->hob_lbal;
1013 desc[8] = tf->hob_lbam;
1014 desc[10] = tf->hob_lbah;
1019 * ata_gen_ata_sense - generate a SCSI fixed sense block
1020 * @qc: Command that we are erroring out
1022 * Generate sense block for a failed ATA command @qc. Descriptor
1023 * format is used to accomodate LBA48 block address.
1028 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1030 struct ata_device *dev = qc->dev;
1031 struct scsi_cmnd *cmd = qc->scsicmd;
1032 struct ata_taskfile *tf = &qc->result_tf;
1033 unsigned char *sb = cmd->sense_buffer;
1034 unsigned char *desc = sb + 8;
1035 int verbose = qc->ap->ops->error_handler == NULL;
1038 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1040 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1042 /* sense data is current and format is descriptor */
1045 /* Use ata_to_sense_error() to map status register bits
1046 * onto sense key, asc & ascq.
1049 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1050 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1051 &sb[1], &sb[2], &sb[3], verbose);
1055 block = ata_tf_read_block(&qc->result_tf, dev);
1057 /* information sense data descriptor */
1062 desc[2] |= 0x80; /* valid */
1063 desc[6] = block >> 40;
1064 desc[7] = block >> 32;
1065 desc[8] = block >> 24;
1066 desc[9] = block >> 16;
1067 desc[10] = block >> 8;
1071 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1073 sdev->use_10_for_rw = 1;
1074 sdev->use_10_for_ms = 1;
1076 /* Schedule policy is determined by ->qc_defer() callback and
1077 * it needs to see every deferred qc. Set dev_blocked to 1 to
1078 * prevent SCSI midlayer from automatically deferring
1081 sdev->max_device_blocked = 1;
1085 * atapi_drain_needed - Check whether data transfer may overflow
1086 * @rq: request to be checked
1088 * ATAPI commands which transfer variable length data to host
1089 * might overflow due to application error or hardare bug. This
1090 * function checks whether overflow should be drained and ignored
1097 * 1 if ; otherwise, 0.
1099 static int atapi_drain_needed(struct request *rq)
1101 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
1104 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
1107 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1110 static int ata_scsi_dev_config(struct scsi_device *sdev,
1111 struct ata_device *dev)
1113 if (!ata_id_has_unload(dev->id))
1114 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1116 /* configure max sectors */
1117 blk_queue_max_hw_sectors(sdev->request_queue, dev->max_sectors);
1119 if (dev->class == ATA_DEV_ATAPI) {
1120 struct request_queue *q = sdev->request_queue;
1123 /* set the min alignment and padding */
1124 blk_queue_update_dma_alignment(sdev->request_queue,
1125 ATA_DMA_PAD_SZ - 1);
1126 blk_queue_update_dma_pad(sdev->request_queue,
1127 ATA_DMA_PAD_SZ - 1);
1129 /* configure draining */
1130 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1132 ata_dev_printk(dev, KERN_ERR,
1133 "drain buffer allocation failed\n");
1137 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1139 /* ATA devices must be sector aligned */
1140 blk_queue_update_dma_alignment(sdev->request_queue,
1142 sdev->manage_start_stop = 1;
1145 if (dev->flags & ATA_DFLAG_AN)
1146 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1148 if (dev->flags & ATA_DFLAG_NCQ) {
1151 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1152 depth = min(ATA_MAX_QUEUE - 1, depth);
1153 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
1160 * ata_scsi_slave_config - Set SCSI device attributes
1161 * @sdev: SCSI device to examine
1163 * This is called before we actually start reading
1164 * and writing to the device, to configure certain
1165 * SCSI mid-layer behaviors.
1168 * Defined by SCSI layer. We don't really care.
1171 int ata_scsi_slave_config(struct scsi_device *sdev)
1173 struct ata_port *ap = ata_shost_to_port(sdev->host);
1174 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1177 ata_scsi_sdev_config(sdev);
1180 rc = ata_scsi_dev_config(sdev, dev);
1186 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1187 * @sdev: SCSI device to be destroyed
1189 * @sdev is about to be destroyed for hot/warm unplugging. If
1190 * this unplugging was initiated by libata as indicated by NULL
1191 * dev->sdev, this function doesn't have to do anything.
1192 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1193 * Clear dev->sdev, schedule the device for ATA detach and invoke
1197 * Defined by SCSI layer. We don't really care.
1199 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1201 struct ata_port *ap = ata_shost_to_port(sdev->host);
1202 struct request_queue *q = sdev->request_queue;
1203 unsigned long flags;
1204 struct ata_device *dev;
1206 if (!ap->ops->error_handler)
1209 spin_lock_irqsave(ap->lock, flags);
1210 dev = __ata_scsi_find_dev(ap, sdev);
1211 if (dev && dev->sdev) {
1212 /* SCSI device already in CANCEL state, no need to offline it */
1214 dev->flags |= ATA_DFLAG_DETACH;
1215 ata_port_schedule_eh(ap);
1217 spin_unlock_irqrestore(ap->lock, flags);
1219 kfree(q->dma_drain_buffer);
1220 q->dma_drain_buffer = NULL;
1221 q->dma_drain_size = 0;
1225 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1226 * @sdev: SCSI device to configure queue depth for
1227 * @queue_depth: new queue depth
1228 * @reason: calling context
1230 * This is libata standard hostt->change_queue_depth callback.
1231 * SCSI will call into this callback when user tries to set queue
1235 * SCSI layer (we don't care)
1238 * Newly configured queue depth.
1240 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth,
1243 struct ata_port *ap = ata_shost_to_port(sdev->host);
1244 struct ata_device *dev;
1245 unsigned long flags;
1247 if (reason != SCSI_QDEPTH_DEFAULT)
1250 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1251 return sdev->queue_depth;
1253 dev = ata_scsi_find_dev(ap, sdev);
1254 if (!dev || !ata_dev_enabled(dev))
1255 return sdev->queue_depth;
1258 spin_lock_irqsave(ap->lock, flags);
1259 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1260 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1261 dev->flags |= ATA_DFLAG_NCQ_OFF;
1264 spin_unlock_irqrestore(ap->lock, flags);
1266 /* limit and apply queue depth */
1267 queue_depth = min(queue_depth, sdev->host->can_queue);
1268 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1269 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1271 if (sdev->queue_depth == queue_depth)
1274 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
1279 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1280 * @qc: Storage for translated ATA taskfile
1282 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1283 * (to start). Perhaps these commands should be preceded by
1284 * CHECK POWER MODE to see what power mode the device is already in.
1285 * [See SAT revision 5 at www.t10.org]
1288 * spin_lock_irqsave(host lock)
1291 * Zero on success, non-zero on error.
1293 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1295 struct scsi_cmnd *scmd = qc->scsicmd;
1296 struct ata_taskfile *tf = &qc->tf;
1297 const u8 *cdb = scmd->cmnd;
1299 if (scmd->cmd_len < 5)
1302 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1303 tf->protocol = ATA_PROT_NODATA;
1305 ; /* ignore IMMED bit, violates sat-r05 */
1308 goto invalid_fld; /* LOEJ bit set not supported */
1309 if (((cdb[4] >> 4) & 0xf) != 0)
1310 goto invalid_fld; /* power conditions not supported */
1313 tf->nsect = 1; /* 1 sector, lba=0 */
1315 if (qc->dev->flags & ATA_DFLAG_LBA) {
1316 tf->flags |= ATA_TFLAG_LBA;
1321 tf->device |= ATA_LBA;
1324 tf->lbal = 0x1; /* sect */
1325 tf->lbam = 0x0; /* cyl low */
1326 tf->lbah = 0x0; /* cyl high */
1329 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1331 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1332 * or S5) causing some drives to spin up and down again.
1334 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1335 system_state == SYSTEM_POWER_OFF)
1338 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1339 system_entering_hibernation())
1342 /* Issue ATA STANDBY IMMEDIATE command */
1343 tf->command = ATA_CMD_STANDBYNOW1;
1347 * Standby and Idle condition timers could be implemented but that
1348 * would require libata to implement the Power condition mode page
1349 * and allow the user to change it. Changing mode pages requires
1350 * MODE SELECT to be implemented.
1356 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1357 /* "Invalid field in cbd" */
1360 scmd->result = SAM_STAT_GOOD;
1366 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1367 * @qc: Storage for translated ATA taskfile
1369 * Sets up an ATA taskfile to issue FLUSH CACHE or
1373 * spin_lock_irqsave(host lock)
1376 * Zero on success, non-zero on error.
1378 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1380 struct ata_taskfile *tf = &qc->tf;
1382 tf->flags |= ATA_TFLAG_DEVICE;
1383 tf->protocol = ATA_PROT_NODATA;
1385 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1386 tf->command = ATA_CMD_FLUSH_EXT;
1388 tf->command = ATA_CMD_FLUSH;
1390 /* flush is critical for IO integrity, consider it an IO command */
1391 qc->flags |= ATA_QCFLAG_IO;
1397 * scsi_6_lba_len - Get LBA and transfer length
1398 * @cdb: SCSI command to translate
1400 * Calculate LBA and transfer length for 6-byte commands.
1404 * @plen: the transfer length
1406 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1411 VPRINTK("six-byte command\n");
1413 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1414 lba |= ((u64)cdb[2]) << 8;
1415 lba |= ((u64)cdb[3]);
1424 * scsi_10_lba_len - Get LBA and transfer length
1425 * @cdb: SCSI command to translate
1427 * Calculate LBA and transfer length for 10-byte commands.
1431 * @plen: the transfer length
1433 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1438 VPRINTK("ten-byte command\n");
1440 lba |= ((u64)cdb[2]) << 24;
1441 lba |= ((u64)cdb[3]) << 16;
1442 lba |= ((u64)cdb[4]) << 8;
1443 lba |= ((u64)cdb[5]);
1445 len |= ((u32)cdb[7]) << 8;
1446 len |= ((u32)cdb[8]);
1453 * scsi_16_lba_len - Get LBA and transfer length
1454 * @cdb: SCSI command to translate
1456 * Calculate LBA and transfer length for 16-byte commands.
1460 * @plen: the transfer length
1462 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1467 VPRINTK("sixteen-byte command\n");
1469 lba |= ((u64)cdb[2]) << 56;
1470 lba |= ((u64)cdb[3]) << 48;
1471 lba |= ((u64)cdb[4]) << 40;
1472 lba |= ((u64)cdb[5]) << 32;
1473 lba |= ((u64)cdb[6]) << 24;
1474 lba |= ((u64)cdb[7]) << 16;
1475 lba |= ((u64)cdb[8]) << 8;
1476 lba |= ((u64)cdb[9]);
1478 len |= ((u32)cdb[10]) << 24;
1479 len |= ((u32)cdb[11]) << 16;
1480 len |= ((u32)cdb[12]) << 8;
1481 len |= ((u32)cdb[13]);
1488 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1489 * @qc: Storage for translated ATA taskfile
1491 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1494 * spin_lock_irqsave(host lock)
1497 * Zero on success, non-zero on error.
1499 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1501 struct scsi_cmnd *scmd = qc->scsicmd;
1502 struct ata_taskfile *tf = &qc->tf;
1503 struct ata_device *dev = qc->dev;
1504 u64 dev_sectors = qc->dev->n_sectors;
1505 const u8 *cdb = scmd->cmnd;
1509 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1510 tf->protocol = ATA_PROT_NODATA;
1512 if (cdb[0] == VERIFY) {
1513 if (scmd->cmd_len < 10)
1515 scsi_10_lba_len(cdb, &block, &n_block);
1516 } else if (cdb[0] == VERIFY_16) {
1517 if (scmd->cmd_len < 16)
1519 scsi_16_lba_len(cdb, &block, &n_block);
1525 if (block >= dev_sectors)
1527 if ((block + n_block) > dev_sectors)
1530 if (dev->flags & ATA_DFLAG_LBA) {
1531 tf->flags |= ATA_TFLAG_LBA;
1533 if (lba_28_ok(block, n_block)) {
1535 tf->command = ATA_CMD_VERIFY;
1536 tf->device |= (block >> 24) & 0xf;
1537 } else if (lba_48_ok(block, n_block)) {
1538 if (!(dev->flags & ATA_DFLAG_LBA48))
1542 tf->flags |= ATA_TFLAG_LBA48;
1543 tf->command = ATA_CMD_VERIFY_EXT;
1545 tf->hob_nsect = (n_block >> 8) & 0xff;
1547 tf->hob_lbah = (block >> 40) & 0xff;
1548 tf->hob_lbam = (block >> 32) & 0xff;
1549 tf->hob_lbal = (block >> 24) & 0xff;
1551 /* request too large even for LBA48 */
1554 tf->nsect = n_block & 0xff;
1556 tf->lbah = (block >> 16) & 0xff;
1557 tf->lbam = (block >> 8) & 0xff;
1558 tf->lbal = block & 0xff;
1560 tf->device |= ATA_LBA;
1563 u32 sect, head, cyl, track;
1565 if (!lba_28_ok(block, n_block))
1568 /* Convert LBA to CHS */
1569 track = (u32)block / dev->sectors;
1570 cyl = track / dev->heads;
1571 head = track % dev->heads;
1572 sect = (u32)block % dev->sectors + 1;
1574 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1575 (u32)block, track, cyl, head, sect);
1577 /* Check whether the converted CHS can fit.
1581 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1584 tf->command = ATA_CMD_VERIFY;
1585 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1588 tf->lbah = cyl >> 8;
1595 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1596 /* "Invalid field in cbd" */
1600 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1601 /* "Logical Block Address out of range" */
1605 scmd->result = SAM_STAT_GOOD;
1610 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1611 * @qc: Storage for translated ATA taskfile
1613 * Converts any of six SCSI read/write commands into the
1614 * ATA counterpart, including starting sector (LBA),
1615 * sector count, and taking into account the device's LBA48
1618 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1619 * %WRITE_16 are currently supported.
1622 * spin_lock_irqsave(host lock)
1625 * Zero on success, non-zero on error.
1627 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1629 struct scsi_cmnd *scmd = qc->scsicmd;
1630 const u8 *cdb = scmd->cmnd;
1631 unsigned int tf_flags = 0;
1636 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1637 tf_flags |= ATA_TFLAG_WRITE;
1639 /* Calculate the SCSI LBA, transfer length and FUA. */
1643 if (unlikely(scmd->cmd_len < 10))
1645 scsi_10_lba_len(cdb, &block, &n_block);
1646 if (unlikely(cdb[1] & (1 << 3)))
1647 tf_flags |= ATA_TFLAG_FUA;
1651 if (unlikely(scmd->cmd_len < 6))
1653 scsi_6_lba_len(cdb, &block, &n_block);
1655 /* for 6-byte r/w commands, transfer length 0
1656 * means 256 blocks of data, not 0 block.
1663 if (unlikely(scmd->cmd_len < 16))
1665 scsi_16_lba_len(cdb, &block, &n_block);
1666 if (unlikely(cdb[1] & (1 << 3)))
1667 tf_flags |= ATA_TFLAG_FUA;
1670 DPRINTK("no-byte command\n");
1674 /* Check and compose ATA command */
1676 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1677 * length 0 means transfer 0 block of data.
1678 * However, for ATA R/W commands, sector count 0 means
1679 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1681 * WARNING: one or two older ATA drives treat 0 as 0...
1685 qc->flags |= ATA_QCFLAG_IO;
1686 qc->nbytes = n_block * ATA_SECT_SIZE;
1688 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1690 if (likely(rc == 0))
1695 /* treat all other errors as -EINVAL, fall through */
1697 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1698 /* "Invalid field in cbd" */
1702 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1703 /* "Logical Block Address out of range" */
1707 scmd->result = SAM_STAT_GOOD;
1711 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1713 struct ata_port *ap = qc->ap;
1714 struct scsi_cmnd *cmd = qc->scsicmd;
1715 u8 *cdb = cmd->cmnd;
1716 int need_sense = (qc->err_mask != 0);
1718 /* For ATA pass thru (SAT) commands, generate a sense block if
1719 * user mandated it or if there's an error. Note that if we
1720 * generate because the user forced us to, a check condition
1721 * is generated and the ATA register values are returned
1722 * whether the command completed successfully or not. If there
1723 * was no error, SK, ASC and ASCQ will all be zero.
1725 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1726 ((cdb[2] & 0x20) || need_sense)) {
1727 ata_gen_passthru_sense(qc);
1730 cmd->result = SAM_STAT_GOOD;
1732 /* TODO: decide which descriptor format to use
1733 * for 48b LBA devices and call that here
1734 * instead of the fixed desc, which is only
1735 * good for smaller LBA (and maybe CHS?)
1738 ata_gen_ata_sense(qc);
1742 if (need_sense && !ap->ops->error_handler)
1743 ata_dump_status(ap->print_id, &qc->result_tf);
1751 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1752 * @dev: ATA device to which the command is addressed
1753 * @cmd: SCSI command to execute
1754 * @done: SCSI command completion function
1755 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1757 * Our ->queuecommand() function has decided that the SCSI
1758 * command issued can be directly translated into an ATA
1759 * command, rather than handled internally.
1761 * This function sets up an ata_queued_cmd structure for the
1762 * SCSI command, and sends that ata_queued_cmd to the hardware.
1764 * The xlat_func argument (actor) returns 0 if ready to execute
1765 * ATA command, else 1 to finish translation. If 1 is returned
1766 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1767 * to be set reflecting an error condition or clean (early)
1771 * spin_lock_irqsave(host lock)
1774 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1775 * needs to be deferred.
1777 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1778 void (*done)(struct scsi_cmnd *),
1779 ata_xlat_func_t xlat_func)
1781 struct ata_port *ap = dev->link->ap;
1782 struct ata_queued_cmd *qc;
1787 qc = ata_scsi_qc_new(dev, cmd, done);
1791 /* data is present; dma-map it */
1792 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1793 cmd->sc_data_direction == DMA_TO_DEVICE) {
1794 if (unlikely(scsi_bufflen(cmd) < 1)) {
1795 ata_dev_printk(dev, KERN_WARNING,
1796 "WARNING: zero len r/w req\n");
1800 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1802 qc->dma_dir = cmd->sc_data_direction;
1805 qc->complete_fn = ata_scsi_qc_complete;
1810 if (ap->ops->qc_defer) {
1811 if ((rc = ap->ops->qc_defer(qc)))
1815 /* select device, send command to hardware */
1824 DPRINTK("EXIT - early finish (good or error)\n");
1829 cmd->result = (DID_ERROR << 16);
1832 DPRINTK("EXIT - internal\n");
1837 DPRINTK("EXIT - defer\n");
1838 if (rc == ATA_DEFER_LINK)
1839 return SCSI_MLQUEUE_DEVICE_BUSY;
1841 return SCSI_MLQUEUE_HOST_BUSY;
1845 * ata_scsi_rbuf_get - Map response buffer.
1846 * @cmd: SCSI command containing buffer to be mapped.
1847 * @flags: unsigned long variable to store irq enable status
1848 * @copy_in: copy in from user buffer
1850 * Prepare buffer for simulated SCSI commands.
1853 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1856 * Pointer to response buffer.
1858 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1859 unsigned long *flags)
1861 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1863 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1865 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1866 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1867 return ata_scsi_rbuf;
1871 * ata_scsi_rbuf_put - Unmap response buffer.
1872 * @cmd: SCSI command containing buffer to be unmapped.
1873 * @copy_out: copy out result
1874 * @flags: @flags passed to ata_scsi_rbuf_get()
1876 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1877 * @copy_back is true.
1880 * Unlocks ata_scsi_rbuf_lock.
1882 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1883 unsigned long *flags)
1886 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1887 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1888 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1892 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1893 * @args: device IDENTIFY data / SCSI command of interest.
1894 * @actor: Callback hook for desired SCSI command simulator
1896 * Takes care of the hard work of simulating a SCSI command...
1897 * Mapping the response buffer, calling the command's handler,
1898 * and handling the handler's return value. This return value
1899 * indicates whether the handler wishes the SCSI command to be
1900 * completed successfully (0), or not (in which case cmd->result
1901 * and sense buffer are assumed to be set).
1904 * spin_lock_irqsave(host lock)
1906 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1907 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1911 struct scsi_cmnd *cmd = args->cmd;
1912 unsigned long flags;
1914 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1915 rc = actor(args, rbuf);
1916 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
1919 cmd->result = SAM_STAT_GOOD;
1924 * ata_scsiop_inq_std - Simulate INQUIRY command
1925 * @args: device IDENTIFY data / SCSI command of interest.
1926 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1928 * Returns standard device identification data associated
1929 * with non-VPD INQUIRY command output.
1932 * spin_lock_irqsave(host lock)
1934 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1936 const u8 versions[] = {
1937 0x60, /* SAM-3 (no version claimed) */
1940 0x20, /* SBC-2 (no version claimed) */
1943 0x60 /* SPC-3 (no version claimed) */
1948 0x5, /* claim SPC-3 version compatibility */
1955 /* set scsi removeable (RMB) bit per ata bit */
1956 if (ata_id_removeable(args->id))
1959 memcpy(rbuf, hdr, sizeof(hdr));
1960 memcpy(&rbuf[8], "ATA ", 8);
1961 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1962 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1964 if (rbuf[32] == 0 || rbuf[32] == ' ')
1965 memcpy(&rbuf[32], "n/a ", 4);
1967 memcpy(rbuf + 59, versions, sizeof(versions));
1973 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1974 * @args: device IDENTIFY data / SCSI command of interest.
1975 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1977 * Returns list of inquiry VPD pages available.
1980 * spin_lock_irqsave(host lock)
1982 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1984 const u8 pages[] = {
1985 0x00, /* page 0x00, this page */
1986 0x80, /* page 0x80, unit serial no page */
1987 0x83, /* page 0x83, device ident page */
1988 0x89, /* page 0x89, ata info page */
1989 0xb0, /* page 0xb0, block limits page */
1990 0xb1, /* page 0xb1, block device characteristics page */
1993 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1994 memcpy(rbuf + 4, pages, sizeof(pages));
1999 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2000 * @args: device IDENTIFY data / SCSI command of interest.
2001 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2003 * Returns ATA device serial number.
2006 * spin_lock_irqsave(host lock)
2008 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2012 0x80, /* this page code */
2014 ATA_ID_SERNO_LEN, /* page len */
2017 memcpy(rbuf, hdr, sizeof(hdr));
2018 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2019 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2024 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2025 * @args: device IDENTIFY data / SCSI command of interest.
2026 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2028 * Yields two logical unit device identification designators:
2029 * - vendor specific ASCII containing the ATA serial number
2030 * - SAT defined "t10 vendor id based" containing ASCII vendor
2031 * name ("ATA "), model and serial numbers.
2034 * spin_lock_irqsave(host lock)
2036 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2038 const int sat_model_serial_desc_len = 68;
2041 rbuf[1] = 0x83; /* this page code */
2044 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2046 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2048 ata_id_string(args->id, (unsigned char *) rbuf + num,
2049 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2050 num += ATA_ID_SERNO_LEN;
2052 /* SAT defined lu model and serial numbers descriptor */
2053 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2056 rbuf[num + 3] = sat_model_serial_desc_len;
2058 memcpy(rbuf + num, "ATA ", 8);
2060 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2062 num += ATA_ID_PROD_LEN;
2063 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2065 num += ATA_ID_SERNO_LEN;
2067 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2072 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2073 * @args: device IDENTIFY data / SCSI command of interest.
2074 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2076 * Yields SAT-specified ATA VPD page.
2079 * spin_lock_irqsave(host lock)
2081 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2083 struct ata_taskfile tf;
2085 memset(&tf, 0, sizeof(tf));
2087 rbuf[1] = 0x89; /* our page code */
2088 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2089 rbuf[3] = (0x238 & 0xff);
2091 memcpy(&rbuf[8], "linux ", 8);
2092 memcpy(&rbuf[16], "libata ", 16);
2093 memcpy(&rbuf[32], DRV_VERSION, 4);
2094 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2096 /* we don't store the ATA device signature, so we fake it */
2098 tf.command = ATA_DRDY; /* really, this is Status reg */
2102 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2103 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2105 rbuf[56] = ATA_CMD_ID_ATA;
2107 memcpy(&rbuf[60], &args->id[0], 512);
2111 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2116 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2119 * Optimal transfer length granularity.
2121 * This is always one physical block, but for disks with a smaller
2122 * logical than physical sector size we need to figure out what the
2125 if (ata_id_has_large_logical_sectors(args->id))
2126 min_io_sectors = ata_id_logical_per_physical_sectors(args->id);
2129 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2132 * Optimal unmap granularity.
2134 * The ATA spec doesn't even know about a granularity or alignment
2135 * for the TRIM command. We can leave away most of the unmap related
2136 * VPD page entries, but we have specifify a granularity to signal
2137 * that we support some form of unmap - in thise case via WRITE SAME
2138 * with the unmap bit set.
2140 if (ata_id_has_trim(args->id)) {
2141 put_unaligned_be32(65535 * 512 / 8, &rbuf[20]);
2142 put_unaligned_be32(1, &rbuf[28]);
2148 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2150 int form_factor = ata_id_form_factor(args->id);
2151 int media_rotation_rate = ata_id_rotation_rate(args->id);
2155 rbuf[4] = media_rotation_rate >> 8;
2156 rbuf[5] = media_rotation_rate;
2157 rbuf[7] = form_factor;
2163 * ata_scsiop_noop - Command handler that simply returns success.
2164 * @args: device IDENTIFY data / SCSI command of interest.
2165 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2167 * No operation. Simply returns success to caller, to indicate
2168 * that the caller should successfully complete this SCSI command.
2171 * spin_lock_irqsave(host lock)
2173 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
2180 * ata_msense_caching - Simulate MODE SENSE caching info page
2181 * @id: device IDENTIFY data
2182 * @buf: output buffer
2184 * Generate a caching info page, which conditionally indicates
2185 * write caching to the SCSI layer, depending on device
2191 static unsigned int ata_msense_caching(u16 *id, u8 *buf)
2193 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
2194 if (ata_id_wcache_enabled(id))
2195 buf[2] |= (1 << 2); /* write cache enable */
2196 if (!ata_id_rahead_enabled(id))
2197 buf[12] |= (1 << 5); /* disable read ahead */
2198 return sizeof(def_cache_mpage);
2202 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2203 * @buf: output buffer
2205 * Generate a generic MODE SENSE control mode page.
2210 static unsigned int ata_msense_ctl_mode(u8 *buf)
2212 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
2213 return sizeof(def_control_mpage);
2217 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2218 * @buf: output buffer
2220 * Generate a generic MODE SENSE r/w error recovery page.
2225 static unsigned int ata_msense_rw_recovery(u8 *buf)
2227 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
2228 return sizeof(def_rw_recovery_mpage);
2232 * We can turn this into a real blacklist if it's needed, for now just
2233 * blacklist any Maxtor BANC1G10 revision firmware
2235 static int ata_dev_supports_fua(u16 *id)
2237 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2241 if (!ata_id_has_fua(id))
2244 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2245 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2247 if (strcmp(model, "Maxtor"))
2249 if (strcmp(fw, "BANC1G10"))
2252 return 0; /* blacklisted */
2256 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2257 * @args: device IDENTIFY data / SCSI command of interest.
2258 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2260 * Simulate MODE SENSE commands. Assume this is invoked for direct
2261 * access devices (e.g. disks) only. There should be no block
2262 * descriptor for other device types.
2265 * spin_lock_irqsave(host lock)
2267 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2269 struct ata_device *dev = args->dev;
2270 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2271 const u8 sat_blk_desc[] = {
2272 0, 0, 0, 0, /* number of blocks: sat unspecified */
2274 0, 0x2, 0x0 /* block length: 512 bytes */
2277 unsigned int ebd, page_control, six_byte;
2282 six_byte = (scsicmd[0] == MODE_SENSE);
2283 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2285 * LLBA bit in msense(10) ignored (compliant)
2288 page_control = scsicmd[2] >> 6;
2289 switch (page_control) {
2290 case 0: /* current */
2291 break; /* supported */
2293 goto saving_not_supp;
2294 case 1: /* changeable */
2295 case 2: /* defaults */
2301 p += 4 + (ebd ? 8 : 0);
2303 p += 8 + (ebd ? 8 : 0);
2305 pg = scsicmd[2] & 0x3f;
2308 * No mode subpages supported (yet) but asking for _all_
2309 * subpages may be valid
2311 if (spg && (spg != ALL_SUB_MPAGES))
2315 case RW_RECOVERY_MPAGE:
2316 p += ata_msense_rw_recovery(p);
2320 p += ata_msense_caching(args->id, p);
2324 p += ata_msense_ctl_mode(p);
2328 p += ata_msense_rw_recovery(p);
2329 p += ata_msense_caching(args->id, p);
2330 p += ata_msense_ctl_mode(p);
2333 default: /* invalid page code */
2338 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2339 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2343 rbuf[0] = p - rbuf - 1;
2346 rbuf[3] = sizeof(sat_blk_desc);
2347 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2350 unsigned int output_len = p - rbuf - 2;
2352 rbuf[0] = output_len >> 8;
2353 rbuf[1] = output_len;
2356 rbuf[7] = sizeof(sat_blk_desc);
2357 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2363 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2364 /* "Invalid field in cbd" */
2368 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2369 /* "Saving parameters not supported" */
2374 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2375 * @args: device IDENTIFY data / SCSI command of interest.
2376 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2378 * Simulate READ CAPACITY commands.
2383 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2385 struct ata_device *dev = args->dev;
2386 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2387 u8 log_per_phys = 0;
2388 u16 lowest_aligned = 0;
2389 u16 word_106 = dev->id[106];
2390 u16 word_209 = dev->id[209];
2392 if ((word_106 & 0xc000) == 0x4000) {
2393 /* Number and offset of logical sectors per physical sector */
2394 if (word_106 & (1 << 13))
2395 log_per_phys = word_106 & 0xf;
2396 if ((word_209 & 0xc000) == 0x4000) {
2397 u16 first = dev->id[209] & 0x3fff;
2399 lowest_aligned = (1 << log_per_phys) - first;
2405 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2406 if (last_lba >= 0xffffffffULL)
2407 last_lba = 0xffffffff;
2409 /* sector count, 32-bit */
2410 rbuf[0] = last_lba >> (8 * 3);
2411 rbuf[1] = last_lba >> (8 * 2);
2412 rbuf[2] = last_lba >> (8 * 1);
2416 rbuf[6] = ATA_SECT_SIZE >> 8;
2417 rbuf[7] = ATA_SECT_SIZE & 0xff;
2419 /* sector count, 64-bit */
2420 rbuf[0] = last_lba >> (8 * 7);
2421 rbuf[1] = last_lba >> (8 * 6);
2422 rbuf[2] = last_lba >> (8 * 5);
2423 rbuf[3] = last_lba >> (8 * 4);
2424 rbuf[4] = last_lba >> (8 * 3);
2425 rbuf[5] = last_lba >> (8 * 2);
2426 rbuf[6] = last_lba >> (8 * 1);
2430 rbuf[10] = ATA_SECT_SIZE >> 8;
2431 rbuf[11] = ATA_SECT_SIZE & 0xff;
2434 rbuf[13] = log_per_phys;
2435 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2436 rbuf[15] = lowest_aligned;
2438 if (ata_id_has_trim(args->id)) {
2439 rbuf[14] |= 0x80; /* TPE */
2441 if (ata_id_has_zero_after_trim(args->id))
2442 rbuf[14] |= 0x40; /* TPRZ */
2450 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2451 * @args: device IDENTIFY data / SCSI command of interest.
2452 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2454 * Simulate REPORT LUNS command.
2457 * spin_lock_irqsave(host lock)
2459 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2462 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2467 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2469 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2470 /* FIXME: not quite right; we don't want the
2471 * translation of taskfile registers into
2472 * a sense descriptors, since that's only
2473 * correct for ATA, not ATAPI
2475 ata_gen_passthru_sense(qc);
2478 qc->scsidone(qc->scsicmd);
2482 /* is it pointless to prefer PIO for "safety reasons"? */
2483 static inline int ata_pio_use_silly(struct ata_port *ap)
2485 return (ap->flags & ATA_FLAG_PIO_DMA);
2488 static void atapi_request_sense(struct ata_queued_cmd *qc)
2490 struct ata_port *ap = qc->ap;
2491 struct scsi_cmnd *cmd = qc->scsicmd;
2493 DPRINTK("ATAPI request sense\n");
2495 /* FIXME: is this needed? */
2496 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2498 #ifdef CONFIG_ATA_SFF
2499 if (ap->ops->sff_tf_read)
2500 ap->ops->sff_tf_read(ap, &qc->tf);
2503 /* fill these in, for the case where they are -not- overwritten */
2504 cmd->sense_buffer[0] = 0x70;
2505 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2509 /* setup sg table and init transfer direction */
2510 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2511 ata_sg_init(qc, &qc->sgent, 1);
2512 qc->dma_dir = DMA_FROM_DEVICE;
2514 memset(&qc->cdb, 0, qc->dev->cdb_len);
2515 qc->cdb[0] = REQUEST_SENSE;
2516 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2518 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2519 qc->tf.command = ATA_CMD_PACKET;
2521 if (ata_pio_use_silly(ap)) {
2522 qc->tf.protocol = ATAPI_PROT_DMA;
2523 qc->tf.feature |= ATAPI_PKT_DMA;
2525 qc->tf.protocol = ATAPI_PROT_PIO;
2526 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2529 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2531 qc->complete_fn = atapi_sense_complete;
2538 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2540 struct scsi_cmnd *cmd = qc->scsicmd;
2541 unsigned int err_mask = qc->err_mask;
2543 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2545 /* handle completion from new EH */
2546 if (unlikely(qc->ap->ops->error_handler &&
2547 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2549 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2550 /* FIXME: not quite right; we don't want the
2551 * translation of taskfile registers into a
2552 * sense descriptors, since that's only
2553 * correct for ATA, not ATAPI
2555 ata_gen_passthru_sense(qc);
2558 /* SCSI EH automatically locks door if sdev->locked is
2559 * set. Sometimes door lock request continues to
2560 * fail, for example, when no media is present. This
2561 * creates a loop - SCSI EH issues door lock which
2562 * fails and gets invoked again to acquire sense data
2563 * for the failed command.
2565 * If door lock fails, always clear sdev->locked to
2566 * avoid this infinite loop.
2568 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2569 qc->dev->sdev->locked = 0;
2571 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2577 /* successful completion or old EH failure path */
2578 if (unlikely(err_mask & AC_ERR_DEV)) {
2579 cmd->result = SAM_STAT_CHECK_CONDITION;
2580 atapi_request_sense(qc);
2582 } else if (unlikely(err_mask)) {
2583 /* FIXME: not quite right; we don't want the
2584 * translation of taskfile registers into
2585 * a sense descriptors, since that's only
2586 * correct for ATA, not ATAPI
2588 ata_gen_passthru_sense(qc);
2590 u8 *scsicmd = cmd->cmnd;
2592 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2593 unsigned long flags;
2596 buf = ata_scsi_rbuf_get(cmd, true, &flags);
2598 /* ATAPI devices typically report zero for their SCSI version,
2599 * and sometimes deviate from the spec WRT response data
2600 * format. If SCSI version is reported as zero like normal,
2601 * then we make the following fixups: 1) Fake MMC-5 version,
2602 * to indicate to the Linux scsi midlayer this is a modern
2603 * device. 2) Ensure response data format / ATAPI information
2604 * are always correct.
2611 ata_scsi_rbuf_put(cmd, true, &flags);
2614 cmd->result = SAM_STAT_GOOD;
2621 * atapi_xlat - Initialize PACKET taskfile
2622 * @qc: command structure to be initialized
2625 * spin_lock_irqsave(host lock)
2628 * Zero on success, non-zero on failure.
2630 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2632 struct scsi_cmnd *scmd = qc->scsicmd;
2633 struct ata_device *dev = qc->dev;
2634 int nodata = (scmd->sc_data_direction == DMA_NONE);
2635 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2636 unsigned int nbytes;
2638 memset(qc->cdb, 0, dev->cdb_len);
2639 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2641 qc->complete_fn = atapi_qc_complete;
2643 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2644 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2645 qc->tf.flags |= ATA_TFLAG_WRITE;
2646 DPRINTK("direction: write\n");
2649 qc->tf.command = ATA_CMD_PACKET;
2650 ata_qc_set_pc_nbytes(qc);
2652 /* check whether ATAPI DMA is safe */
2653 if (!nodata && !using_pio && atapi_check_dma(qc))
2656 /* Some controller variants snoop this value for Packet
2657 * transfers to do state machine and FIFO management. Thus we
2658 * want to set it properly, and for DMA where it is
2659 * effectively meaningless.
2661 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2663 /* Most ATAPI devices which honor transfer chunk size don't
2664 * behave according to the spec when odd chunk size which
2665 * matches the transfer length is specified. If the number of
2666 * bytes to transfer is 2n+1. According to the spec, what
2667 * should happen is to indicate that 2n+1 is going to be
2668 * transferred and transfer 2n+2 bytes where the last byte is
2671 * In practice, this doesn't happen. ATAPI devices first
2672 * indicate and transfer 2n bytes and then indicate and
2673 * transfer 2 bytes where the last byte is padding.
2675 * This inconsistency confuses several controllers which
2676 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2677 * These controllers use actual number of transferred bytes to
2678 * update DMA poitner and transfer of 4n+2 bytes make those
2679 * controller push DMA pointer by 4n+4 bytes because SATA data
2680 * FISes are aligned to 4 bytes. This causes data corruption
2681 * and buffer overrun.
2683 * Always setting nbytes to even number solves this problem
2684 * because then ATAPI devices don't have to split data at 2n
2690 qc->tf.lbam = (nbytes & 0xFF);
2691 qc->tf.lbah = (nbytes >> 8);
2694 qc->tf.protocol = ATAPI_PROT_NODATA;
2696 qc->tf.protocol = ATAPI_PROT_PIO;
2699 qc->tf.protocol = ATAPI_PROT_DMA;
2700 qc->tf.feature |= ATAPI_PKT_DMA;
2702 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2703 (scmd->sc_data_direction != DMA_TO_DEVICE))
2704 /* some SATA bridges need us to indicate data xfer direction */
2705 qc->tf.feature |= ATAPI_DMADIR;
2709 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2710 as ATAPI tape drives don't get this right otherwise */
2714 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2716 if (!sata_pmp_attached(ap)) {
2717 if (likely(devno < ata_link_max_devices(&ap->link)))
2718 return &ap->link.device[devno];
2720 if (likely(devno < ap->nr_pmp_links))
2721 return &ap->pmp_link[devno].device[0];
2727 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2728 const struct scsi_device *scsidev)
2732 /* skip commands not addressed to targets we simulate */
2733 if (!sata_pmp_attached(ap)) {
2734 if (unlikely(scsidev->channel || scsidev->lun))
2736 devno = scsidev->id;
2738 if (unlikely(scsidev->id || scsidev->lun))
2740 devno = scsidev->channel;
2743 return ata_find_dev(ap, devno);
2747 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2748 * @ap: ATA port to which the device is attached
2749 * @scsidev: SCSI device from which we derive the ATA device
2751 * Given various information provided in struct scsi_cmnd,
2752 * map that onto an ATA bus, and using that mapping
2753 * determine which ata_device is associated with the
2754 * SCSI command to be sent.
2757 * spin_lock_irqsave(host lock)
2760 * Associated ATA device, or %NULL if not found.
2762 static struct ata_device *
2763 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2765 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2767 if (unlikely(!dev || !ata_dev_enabled(dev)))
2774 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2775 * @byte1: Byte 1 from pass-thru CDB.
2778 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2781 ata_scsi_map_proto(u8 byte1)
2783 switch((byte1 & 0x1e) >> 1) {
2784 case 3: /* Non-data */
2785 return ATA_PROT_NODATA;
2788 case 10: /* UDMA Data-in */
2789 case 11: /* UDMA Data-Out */
2790 return ATA_PROT_DMA;
2792 case 4: /* PIO Data-in */
2793 case 5: /* PIO Data-out */
2794 return ATA_PROT_PIO;
2796 case 0: /* Hard Reset */
2798 case 8: /* Device Diagnostic */
2799 case 9: /* Device Reset */
2800 case 7: /* DMA Queued */
2801 case 12: /* FPDMA */
2802 case 15: /* Return Response Info */
2803 default: /* Reserved */
2807 return ATA_PROT_UNKNOWN;
2811 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2812 * @qc: command structure to be initialized
2814 * Handles either 12 or 16-byte versions of the CDB.
2817 * Zero on success, non-zero on failure.
2819 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2821 struct ata_taskfile *tf = &(qc->tf);
2822 struct scsi_cmnd *scmd = qc->scsicmd;
2823 struct ata_device *dev = qc->dev;
2824 const u8 *cdb = scmd->cmnd;
2826 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2830 * 12 and 16 byte CDBs use different offsets to
2831 * provide the various register values.
2833 if (cdb[0] == ATA_16) {
2835 * 16-byte CDB - may contain extended commands.
2837 * If that is the case, copy the upper byte register values.
2839 if (cdb[1] & 0x01) {
2840 tf->hob_feature = cdb[3];
2841 tf->hob_nsect = cdb[5];
2842 tf->hob_lbal = cdb[7];
2843 tf->hob_lbam = cdb[9];
2844 tf->hob_lbah = cdb[11];
2845 tf->flags |= ATA_TFLAG_LBA48;
2847 tf->flags &= ~ATA_TFLAG_LBA48;
2850 * Always copy low byte, device and command registers.
2852 tf->feature = cdb[4];
2857 tf->device = cdb[13];
2858 tf->command = cdb[14];
2861 * 12-byte CDB - incapable of extended commands.
2863 tf->flags &= ~ATA_TFLAG_LBA48;
2865 tf->feature = cdb[3];
2870 tf->device = cdb[8];
2871 tf->command = cdb[9];
2874 /* enforce correct master/slave bit */
2875 tf->device = dev->devno ?
2876 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2878 /* READ/WRITE LONG use a non-standard sect_size */
2879 qc->sect_size = ATA_SECT_SIZE;
2880 switch (tf->command) {
2881 case ATA_CMD_READ_LONG:
2882 case ATA_CMD_READ_LONG_ONCE:
2883 case ATA_CMD_WRITE_LONG:
2884 case ATA_CMD_WRITE_LONG_ONCE:
2885 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2887 qc->sect_size = scsi_bufflen(scmd);
2891 * Set flags so that all registers will be written, pass on
2892 * write indication (used for PIO/DMA setup), result TF is
2893 * copied back and we don't whine too much about its failure.
2895 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2896 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2897 tf->flags |= ATA_TFLAG_WRITE;
2899 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2902 * Set transfer length.
2904 * TODO: find out if we need to do more here to
2905 * cover scatter/gather case.
2907 ata_qc_set_pc_nbytes(qc);
2909 /* We may not issue DMA commands if no DMA mode is set */
2910 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2913 /* sanity check for pio multi commands */
2914 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2917 if (is_multi_taskfile(tf)) {
2918 unsigned int multi_count = 1 << (cdb[1] >> 5);
2920 /* compare the passed through multi_count
2921 * with the cached multi_count of libata
2923 if (multi_count != dev->multi_count)
2924 ata_dev_printk(dev, KERN_WARNING,
2925 "invalid multi_count %u ignored\n",
2930 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2931 * SET_FEATURES - XFER MODE must be preceded/succeeded
2932 * by an update to hardware-specific registers for each
2933 * controller (i.e. the reason for ->set_piomode(),
2934 * ->set_dmamode(), and ->post_set_mode() hooks).
2936 if (tf->command == ATA_CMD_SET_FEATURES &&
2937 tf->feature == SETFEATURES_XFER)
2941 * Filter TPM commands by default. These provide an
2942 * essentially uncontrolled encrypted "back door" between
2943 * applications and the disk. Set libata.allow_tpm=1 if you
2944 * have a real reason for wanting to use them. This ensures
2945 * that installed software cannot easily mess stuff up without
2946 * user intent. DVR type users will probably ship with this enabled
2947 * for movie content management.
2949 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2950 * for this and should do in future but that it is not sufficient as
2951 * DCS is an optional feature set. Thus we also do the software filter
2952 * so that we comply with the TC consortium stated goal that the user
2953 * can turn off TC features of their system.
2955 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
2961 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
2962 /* "Invalid field in cdb" */
2966 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
2968 struct ata_taskfile *tf = &qc->tf;
2969 struct scsi_cmnd *scmd = qc->scsicmd;
2970 struct ata_device *dev = qc->dev;
2971 const u8 *cdb = scmd->cmnd;
2977 /* we may not issue DMA commands if no DMA mode is set */
2978 if (unlikely(!dev->dma_mode))
2981 if (unlikely(scmd->cmd_len < 16))
2983 scsi_16_lba_len(cdb, &block, &n_block);
2985 /* for now we only support WRITE SAME with the unmap bit set */
2986 if (unlikely(!(cdb[1] & 0x8)))
2990 * WRITE SAME always has a sector sized buffer as payload, this
2991 * should never be a multiple entry S/G list.
2993 if (!scsi_sg_count(scmd))
2996 buf = page_address(sg_page(scsi_sglist(scmd)));
2997 size = ata_set_lba_range_entries(buf, 512, block, n_block);
2999 tf->protocol = ATA_PROT_DMA;
3000 tf->hob_feature = 0;
3001 tf->feature = ATA_DSM_TRIM;
3002 tf->hob_nsect = (size / 512) >> 8;
3003 tf->nsect = size / 512;
3004 tf->command = ATA_CMD_DSM;
3005 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3008 ata_qc_set_pc_nbytes(qc);
3013 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3014 /* "Invalid field in cdb" */
3019 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3021 * @cmd: SCSI command opcode to consider
3023 * Look up the SCSI command given, and determine whether the
3024 * SCSI command is to be translated or simulated.
3027 * Pointer to translation function if possible, %NULL if not.
3030 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3040 return ata_scsi_rw_xlat;
3043 return ata_scsi_write_same_xlat;
3045 case SYNCHRONIZE_CACHE:
3046 if (ata_try_flush_cache(dev))
3047 return ata_scsi_flush_xlat;
3052 return ata_scsi_verify_xlat;
3056 return ata_scsi_pass_thru;
3059 return ata_scsi_start_stop_xlat;
3066 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3067 * @ap: ATA port to which the command was being sent
3068 * @cmd: SCSI command to dump
3070 * Prints the contents of a SCSI command via printk().
3073 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3074 struct scsi_cmnd *cmd)
3077 struct scsi_device *scsidev = cmd->device;
3078 u8 *scsicmd = cmd->cmnd;
3080 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
3082 scsidev->channel, scsidev->id, scsidev->lun,
3083 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3084 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3089 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
3090 void (*done)(struct scsi_cmnd *),
3091 struct ata_device *dev)
3093 u8 scsi_op = scmd->cmnd[0];
3094 ata_xlat_func_t xlat_func;
3097 if (dev->class == ATA_DEV_ATA) {
3098 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3101 xlat_func = ata_get_xlat_func(dev, scsi_op);
3103 if (unlikely(!scmd->cmd_len))
3107 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3108 /* relay SCSI command to ATAPI device */
3109 int len = COMMAND_SIZE(scsi_op);
3110 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
3113 xlat_func = atapi_xlat;
3115 /* ATA_16 passthru, treat as an ATA command */
3116 if (unlikely(scmd->cmd_len > 16))
3119 xlat_func = ata_get_xlat_func(dev, scsi_op);
3124 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
3126 ata_scsi_simulate(dev, scmd, done);
3131 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3132 scmd->cmd_len, scsi_op, dev->cdb_len);
3133 scmd->result = DID_ERROR << 16;
3139 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3140 * @cmd: SCSI command to be sent
3141 * @done: Completion function, called when command is complete
3143 * In some cases, this function translates SCSI commands into
3144 * ATA taskfiles, and queues the taskfiles to be sent to
3145 * hardware. In other cases, this function simulates a
3146 * SCSI device by evaluating and responding to certain
3147 * SCSI commands. This creates the overall effect of
3148 * ATA and ATAPI devices appearing as SCSI devices.
3151 * Releases scsi-layer-held lock, and obtains host lock.
3154 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3157 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
3159 struct ata_port *ap;
3160 struct ata_device *dev;
3161 struct scsi_device *scsidev = cmd->device;
3162 struct Scsi_Host *shost = scsidev->host;
3165 ap = ata_shost_to_port(shost);
3167 spin_unlock(shost->host_lock);
3168 spin_lock(ap->lock);
3170 ata_scsi_dump_cdb(ap, cmd);
3172 dev = ata_scsi_find_dev(ap, scsidev);
3174 rc = __ata_scsi_queuecmd(cmd, done, dev);
3176 cmd->result = (DID_BAD_TARGET << 16);
3180 spin_unlock(ap->lock);
3181 spin_lock(shost->host_lock);
3186 * ata_scsi_simulate - simulate SCSI command on ATA device
3187 * @dev: the target device
3188 * @cmd: SCSI command being sent to device.
3189 * @done: SCSI command completion function.
3191 * Interprets and directly executes a select list of SCSI commands
3192 * that can be handled internally.
3195 * spin_lock_irqsave(host lock)
3198 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
3199 void (*done)(struct scsi_cmnd *))
3201 struct ata_scsi_args args;
3202 const u8 *scsicmd = cmd->cmnd;
3210 switch(scsicmd[0]) {
3211 /* TODO: worth improving? */
3213 ata_scsi_invalid_field(cmd, done);
3217 if (scsicmd[1] & 2) /* is CmdDt set? */
3218 ata_scsi_invalid_field(cmd, done);
3219 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3220 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3221 else switch (scsicmd[2]) {
3223 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
3226 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
3229 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
3232 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3235 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3238 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3241 ata_scsi_invalid_field(cmd, done);
3248 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3251 case MODE_SELECT: /* unconditionally return */
3252 case MODE_SELECT_10: /* bad-field-in-cdb */
3253 ata_scsi_invalid_field(cmd, done);
3257 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3260 case SERVICE_ACTION_IN:
3261 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3262 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3264 ata_scsi_invalid_field(cmd, done);
3268 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3272 ata_scsi_set_sense(cmd, 0, 0, 0);
3273 cmd->result = (DRIVER_SENSE << 24);
3277 /* if we reach this, then writeback caching is disabled,
3278 * turning this into a no-op.
3280 case SYNCHRONIZE_CACHE:
3283 /* no-op's, complete with success */
3287 case TEST_UNIT_READY:
3288 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3291 case SEND_DIAGNOSTIC:
3292 tmp8 = scsicmd[1] & ~(1 << 3);
3293 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3294 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3296 ata_scsi_invalid_field(cmd, done);
3299 /* all other commands */
3301 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3302 /* "Invalid command operation code" */
3308 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3312 for (i = 0; i < host->n_ports; i++) {
3313 struct ata_port *ap = host->ports[i];
3314 struct Scsi_Host *shost;
3317 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3321 *(struct ata_port **)&shost->hostdata[0] = ap;
3322 ap->scsi_host = shost;
3324 shost->transportt = ata_scsi_transport_template;
3325 shost->unique_id = ap->print_id;
3328 shost->max_channel = 1;
3329 shost->max_cmd_len = 16;
3331 /* Schedule policy is determined by ->qc_defer()
3332 * callback and it needs to see every deferred qc.
3333 * Set host_blocked to 1 to prevent SCSI midlayer from
3334 * automatically deferring requests.
3336 shost->max_host_blocked = 1;
3338 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3346 scsi_host_put(host->ports[i]->scsi_host);
3349 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3351 scsi_remove_host(shost);
3352 scsi_host_put(shost);
3357 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3360 struct ata_device *last_failed_dev = NULL;
3361 struct ata_link *link;
3362 struct ata_device *dev;
3365 ata_for_each_link(link, ap, EDGE) {
3366 ata_for_each_dev(dev, link, ENABLED) {
3367 struct scsi_device *sdev;
3368 int channel = 0, id = 0;
3373 if (ata_is_host_link(link))
3376 channel = link->pmp;
3378 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3380 if (!IS_ERR(sdev)) {
3382 scsi_device_put(sdev);
3387 /* If we scanned while EH was in progress or allocation
3388 * failure occurred, scan would have failed silently. Check
3389 * whether all devices are attached.
3391 ata_for_each_link(link, ap, EDGE) {
3392 ata_for_each_dev(dev, link, ENABLED) {
3401 /* we're missing some SCSI devices */
3403 /* If caller requested synchrnous scan && we've made
3404 * any progress, sleep briefly and repeat.
3406 if (dev != last_failed_dev) {
3408 last_failed_dev = dev;
3412 /* We might be failing to detect boot device, give it
3413 * a few more chances.
3420 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3421 "failed without making any progress,\n"
3422 " switching to async\n");
3425 queue_delayed_work(system_long_wq, &ap->hotplug_task,
3426 round_jiffies_relative(HZ));
3430 * ata_scsi_offline_dev - offline attached SCSI device
3431 * @dev: ATA device to offline attached SCSI device for
3433 * This function is called from ata_eh_hotplug() and responsible
3434 * for taking the SCSI device attached to @dev offline. This
3435 * function is called with host lock which protects dev->sdev
3439 * spin_lock_irqsave(host lock)
3442 * 1 if attached SCSI device exists, 0 otherwise.
3444 int ata_scsi_offline_dev(struct ata_device *dev)
3447 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3454 * ata_scsi_remove_dev - remove attached SCSI device
3455 * @dev: ATA device to remove attached SCSI device for
3457 * This function is called from ata_eh_scsi_hotplug() and
3458 * responsible for removing the SCSI device attached to @dev.
3461 * Kernel thread context (may sleep).
3463 static void ata_scsi_remove_dev(struct ata_device *dev)
3465 struct ata_port *ap = dev->link->ap;
3466 struct scsi_device *sdev;
3467 unsigned long flags;
3469 /* Alas, we need to grab scan_mutex to ensure SCSI device
3470 * state doesn't change underneath us and thus
3471 * scsi_device_get() always succeeds. The mutex locking can
3472 * be removed if there is __scsi_device_get() interface which
3473 * increments reference counts regardless of device state.
3475 mutex_lock(&ap->scsi_host->scan_mutex);
3476 spin_lock_irqsave(ap->lock, flags);
3478 /* clearing dev->sdev is protected by host lock */
3483 /* If user initiated unplug races with us, sdev can go
3484 * away underneath us after the host lock and
3485 * scan_mutex are released. Hold onto it.
3487 if (scsi_device_get(sdev) == 0) {
3488 /* The following ensures the attached sdev is
3489 * offline on return from ata_scsi_offline_dev()
3490 * regardless it wins or loses the race
3491 * against this function.
3493 scsi_device_set_state(sdev, SDEV_OFFLINE);
3500 spin_unlock_irqrestore(ap->lock, flags);
3501 mutex_unlock(&ap->scsi_host->scan_mutex);
3504 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3505 dev_name(&sdev->sdev_gendev));
3507 scsi_remove_device(sdev);
3508 scsi_device_put(sdev);
3512 static void ata_scsi_handle_link_detach(struct ata_link *link)
3514 struct ata_port *ap = link->ap;
3515 struct ata_device *dev;
3517 ata_for_each_dev(dev, link, ALL) {
3518 unsigned long flags;
3520 if (!(dev->flags & ATA_DFLAG_DETACHED))
3523 spin_lock_irqsave(ap->lock, flags);
3524 dev->flags &= ~ATA_DFLAG_DETACHED;
3525 spin_unlock_irqrestore(ap->lock, flags);
3527 ata_scsi_remove_dev(dev);
3532 * ata_scsi_media_change_notify - send media change event
3533 * @dev: Pointer to the disk device with media change event
3535 * Tell the block layer to send a media change notification
3539 * spin_lock_irqsave(host lock)
3541 void ata_scsi_media_change_notify(struct ata_device *dev)
3544 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3549 * ata_scsi_hotplug - SCSI part of hotplug
3550 * @work: Pointer to ATA port to perform SCSI hotplug on
3552 * Perform SCSI part of hotplug. It's executed from a separate
3553 * workqueue after EH completes. This is necessary because SCSI
3554 * hot plugging requires working EH and hot unplugging is
3555 * synchronized with hot plugging with a mutex.
3558 * Kernel thread context (may sleep).
3560 void ata_scsi_hotplug(struct work_struct *work)
3562 struct ata_port *ap =
3563 container_of(work, struct ata_port, hotplug_task.work);
3566 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3567 DPRINTK("ENTER/EXIT - unloading\n");
3572 mutex_lock(&ap->scsi_scan_mutex);
3574 /* Unplug detached devices. We cannot use link iterator here
3575 * because PMP links have to be scanned even if PMP is
3576 * currently not attached. Iterate manually.
3578 ata_scsi_handle_link_detach(&ap->link);
3580 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3581 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3583 /* scan for new ones */
3584 ata_scsi_scan_host(ap, 0);
3586 mutex_unlock(&ap->scsi_scan_mutex);
3591 * ata_scsi_user_scan - indication for user-initiated bus scan
3592 * @shost: SCSI host to scan
3593 * @channel: Channel to scan
3597 * This function is called when user explicitly requests bus
3598 * scan. Set probe pending flag and invoke EH.
3601 * SCSI layer (we don't care)
3606 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3607 unsigned int id, unsigned int lun)
3609 struct ata_port *ap = ata_shost_to_port(shost);
3610 unsigned long flags;
3613 if (!ap->ops->error_handler)
3616 if (lun != SCAN_WILD_CARD && lun)
3619 if (!sata_pmp_attached(ap)) {
3620 if (channel != SCAN_WILD_CARD && channel)
3624 if (id != SCAN_WILD_CARD && id)
3629 spin_lock_irqsave(ap->lock, flags);
3631 if (devno == SCAN_WILD_CARD) {
3632 struct ata_link *link;
3634 ata_for_each_link(link, ap, EDGE) {
3635 struct ata_eh_info *ehi = &link->eh_info;
3636 ehi->probe_mask |= ATA_ALL_DEVICES;
3637 ehi->action |= ATA_EH_RESET;
3640 struct ata_device *dev = ata_find_dev(ap, devno);
3643 struct ata_eh_info *ehi = &dev->link->eh_info;
3644 ehi->probe_mask |= 1 << dev->devno;
3645 ehi->action |= ATA_EH_RESET;
3651 ata_port_schedule_eh(ap);
3652 spin_unlock_irqrestore(ap->lock, flags);
3653 ata_port_wait_eh(ap);
3655 spin_unlock_irqrestore(ap->lock, flags);
3661 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3662 * @work: Pointer to ATA port to perform scsi_rescan_device()
3664 * After ATA pass thru (SAT) commands are executed successfully,
3665 * libata need to propagate the changes to SCSI layer.
3668 * Kernel thread context (may sleep).
3670 void ata_scsi_dev_rescan(struct work_struct *work)
3672 struct ata_port *ap =
3673 container_of(work, struct ata_port, scsi_rescan_task);
3674 struct ata_link *link;
3675 struct ata_device *dev;
3676 unsigned long flags;
3678 mutex_lock(&ap->scsi_scan_mutex);
3679 spin_lock_irqsave(ap->lock, flags);
3681 ata_for_each_link(link, ap, EDGE) {
3682 ata_for_each_dev(dev, link, ENABLED) {
3683 struct scsi_device *sdev = dev->sdev;
3687 if (scsi_device_get(sdev))
3690 spin_unlock_irqrestore(ap->lock, flags);
3691 scsi_rescan_device(&(sdev->sdev_gendev));
3692 scsi_device_put(sdev);
3693 spin_lock_irqsave(ap->lock, flags);
3697 spin_unlock_irqrestore(ap->lock, flags);
3698 mutex_unlock(&ap->scsi_scan_mutex);
3702 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3703 * @host: ATA host container for all SAS ports
3704 * @port_info: Information from low-level host driver
3705 * @shost: SCSI host that the scsi device is attached to
3708 * PCI/etc. bus probe sem.
3711 * ata_port pointer on success / NULL on failure.
3714 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3715 struct ata_port_info *port_info,
3716 struct Scsi_Host *shost)
3718 struct ata_port *ap;
3720 ap = ata_port_alloc(host);
3725 ap->lock = shost->host_lock;
3726 ap->pio_mask = port_info->pio_mask;
3727 ap->mwdma_mask = port_info->mwdma_mask;
3728 ap->udma_mask = port_info->udma_mask;
3729 ap->flags |= port_info->flags;
3730 ap->ops = port_info->port_ops;
3731 ap->cbl = ATA_CBL_SATA;
3735 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3738 * ata_sas_port_start - Set port up for dma.
3739 * @ap: Port to initialize
3741 * Called just after data structures for each port are
3744 * May be used as the port_start() entry in ata_port_operations.
3747 * Inherited from caller.
3749 int ata_sas_port_start(struct ata_port *ap)
3753 EXPORT_SYMBOL_GPL(ata_sas_port_start);
3756 * ata_port_stop - Undo ata_sas_port_start()
3757 * @ap: Port to shut down
3759 * May be used as the port_stop() entry in ata_port_operations.
3762 * Inherited from caller.
3765 void ata_sas_port_stop(struct ata_port *ap)
3768 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3771 * ata_sas_port_init - Initialize a SATA device
3772 * @ap: SATA port to initialize
3775 * PCI/etc. bus probe sem.
3778 * Zero on success, non-zero on error.
3781 int ata_sas_port_init(struct ata_port *ap)
3783 int rc = ap->ops->port_start(ap);
3786 ap->print_id = ata_print_id++;
3787 rc = ata_bus_probe(ap);
3792 EXPORT_SYMBOL_GPL(ata_sas_port_init);
3795 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3796 * @ap: SATA port to destroy
3800 void ata_sas_port_destroy(struct ata_port *ap)
3802 if (ap->ops->port_stop)
3803 ap->ops->port_stop(ap);
3806 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3809 * ata_sas_slave_configure - Default slave_config routine for libata devices
3810 * @sdev: SCSI device to configure
3811 * @ap: ATA port to which SCSI device is attached
3817 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3819 ata_scsi_sdev_config(sdev);
3820 ata_scsi_dev_config(sdev, ap->link.device);
3823 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3826 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3827 * @cmd: SCSI command to be sent
3828 * @done: Completion function, called when command is complete
3829 * @ap: ATA port to which the command is being sent
3832 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3836 int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3837 struct ata_port *ap)
3841 ata_scsi_dump_cdb(ap, cmd);
3843 if (likely(ata_dev_enabled(ap->link.device)))
3844 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
3846 cmd->result = (DID_BAD_TARGET << 16);
3851 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);