2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/kernel.h>
37 #include <linux/blkdev.h>
38 #include <linux/spinlock.h>
39 #include <scsi/scsi.h>
40 #include <scsi/scsi_host.h>
41 #include <scsi/scsi_cmnd.h>
42 #include <scsi/scsi_eh.h>
43 #include <scsi/scsi_device.h>
44 #include <scsi/scsi_tcq.h>
45 #include <scsi/scsi_transport.h>
46 #include <linux/libata.h>
47 #include <linux/hdreg.h>
48 #include <linux/uaccess.h>
52 #define SECTOR_SIZE 512
53 #define ATA_SCSI_RBUF_SIZE 4096
55 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
56 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
58 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
60 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
61 const struct scsi_device *scsidev);
62 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
63 const struct scsi_device *scsidev);
64 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
65 unsigned int id, unsigned int lun);
68 #define RW_RECOVERY_MPAGE 0x1
69 #define RW_RECOVERY_MPAGE_LEN 12
70 #define CACHE_MPAGE 0x8
71 #define CACHE_MPAGE_LEN 20
72 #define CONTROL_MPAGE 0xa
73 #define CONTROL_MPAGE_LEN 12
74 #define ALL_MPAGES 0x3f
75 #define ALL_SUB_MPAGES 0xff
78 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
80 RW_RECOVERY_MPAGE_LEN - 2,
82 0, /* read retry count */
84 0, /* write retry count */
88 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
91 0, /* contains WCE, needs to be 0 for logic */
92 0, 0, 0, 0, 0, 0, 0, 0, 0,
93 0, /* contains DRA, needs to be 0 for logic */
97 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
99 CONTROL_MPAGE_LEN - 2,
100 2, /* DSENSE=0, GLTSD=1 */
101 0, /* [QAM+QERR may be 1, see 05-359r1] */
102 0, 0, 0, 0, 0xff, 0xff,
103 0, 30 /* extended self test time, see 05-359r1 */
107 * libata transport template. libata doesn't do real transport stuff.
108 * It just needs the eh_timed_out hook.
110 static struct scsi_transport_template ata_scsi_transport_template = {
111 .eh_strategy_handler = ata_scsi_error,
112 .eh_timed_out = ata_scsi_timed_out,
113 .user_scan = ata_scsi_user_scan,
117 static const struct {
120 } link_pm_policy[] = {
121 { NOT_AVAILABLE, "max_performance" },
122 { MIN_POWER, "min_power" },
123 { MAX_PERFORMANCE, "max_performance" },
124 { MEDIUM_POWER, "medium_power" },
127 static const char *ata_scsi_lpm_get(enum link_pm policy)
131 for (i = 0; i < ARRAY_SIZE(link_pm_policy); i++)
132 if (link_pm_policy[i].value == policy)
133 return link_pm_policy[i].name;
138 static ssize_t ata_scsi_lpm_put(struct device *dev,
139 struct device_attribute *attr,
140 const char *buf, size_t count)
142 struct Scsi_Host *shost = class_to_shost(dev);
143 struct ata_port *ap = ata_shost_to_port(shost);
144 enum link_pm policy = 0;
148 * we are skipping array location 0 on purpose - this
149 * is because a value of NOT_AVAILABLE is displayed
150 * to the user as max_performance, but when the user
151 * writes "max_performance", they actually want the
152 * value to match MAX_PERFORMANCE.
154 for (i = 1; i < ARRAY_SIZE(link_pm_policy); i++) {
155 const int len = strlen(link_pm_policy[i].name);
156 if (strncmp(link_pm_policy[i].name, buf, len) == 0 &&
158 policy = link_pm_policy[i].value;
165 ata_lpm_schedule(ap, policy);
170 ata_scsi_lpm_show(struct device *dev, struct device_attribute *attr, char *buf)
172 struct Scsi_Host *shost = class_to_shost(dev);
173 struct ata_port *ap = ata_shost_to_port(shost);
175 ata_scsi_lpm_get(ap->pm_policy);
180 return snprintf(buf, 23, "%s\n", policy);
182 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
183 ata_scsi_lpm_show, ata_scsi_lpm_put);
184 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
186 static ssize_t ata_scsi_park_show(struct device *device,
187 struct device_attribute *attr, char *buf)
189 struct scsi_device *sdev = to_scsi_device(device);
191 struct ata_link *link;
192 struct ata_device *dev;
193 unsigned long flags, now;
194 unsigned int uninitialized_var(msecs);
197 ap = ata_shost_to_port(sdev->host);
199 spin_lock_irqsave(ap->lock, flags);
200 dev = ata_scsi_find_dev(ap, sdev);
205 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
212 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
213 link->eh_context.unloaded_mask & (1 << dev->devno) &&
214 time_after(dev->unpark_deadline, now))
215 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
220 spin_unlock_irq(ap->lock);
222 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
225 static ssize_t ata_scsi_park_store(struct device *device,
226 struct device_attribute *attr,
227 const char *buf, size_t len)
229 struct scsi_device *sdev = to_scsi_device(device);
231 struct ata_device *dev;
236 rc = strict_strtol(buf, 10, &input);
237 if (rc || input < -2)
239 if (input > ATA_TMOUT_MAX_PARK) {
241 input = ATA_TMOUT_MAX_PARK;
244 ap = ata_shost_to_port(sdev->host);
246 spin_lock_irqsave(ap->lock, flags);
247 dev = ata_scsi_find_dev(ap, sdev);
248 if (unlikely(!dev)) {
252 if (dev->class != ATA_DEV_ATA) {
258 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
263 dev->unpark_deadline = ata_deadline(jiffies, input);
264 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
265 ata_port_schedule_eh(ap);
266 complete(&ap->park_req_pending);
270 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
273 dev->flags |= ATA_DFLAG_NO_UNLOAD;
278 spin_unlock_irqrestore(ap->lock, flags);
280 return rc ? rc : len;
282 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
283 ata_scsi_park_show, ata_scsi_park_store);
284 EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
286 static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
288 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
290 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
294 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
295 const char *buf, size_t count)
297 struct Scsi_Host *shost = class_to_shost(dev);
298 struct ata_port *ap = ata_shost_to_port(shost);
299 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
300 return ap->ops->em_store(ap, buf, count);
305 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
308 struct Scsi_Host *shost = class_to_shost(dev);
309 struct ata_port *ap = ata_shost_to_port(shost);
311 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
312 return ap->ops->em_show(ap, buf);
315 DEVICE_ATTR(em_message, S_IRUGO | S_IWUGO,
316 ata_scsi_em_message_show, ata_scsi_em_message_store);
317 EXPORT_SYMBOL_GPL(dev_attr_em_message);
320 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
323 struct Scsi_Host *shost = class_to_shost(dev);
324 struct ata_port *ap = ata_shost_to_port(shost);
326 return snprintf(buf, 23, "%d\n", ap->em_message_type);
328 DEVICE_ATTR(em_message_type, S_IRUGO,
329 ata_scsi_em_message_type_show, NULL);
330 EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
333 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
336 struct scsi_device *sdev = to_scsi_device(dev);
337 struct ata_port *ap = ata_shost_to_port(sdev->host);
338 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
340 if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY))
341 return ap->ops->sw_activity_show(atadev, buf);
346 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
347 const char *buf, size_t count)
349 struct scsi_device *sdev = to_scsi_device(dev);
350 struct ata_port *ap = ata_shost_to_port(sdev->host);
351 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
352 enum sw_activity val;
355 if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
356 val = simple_strtoul(buf, NULL, 0);
358 case OFF: case BLINK_ON: case BLINK_OFF:
359 rc = ap->ops->sw_activity_store(atadev, val);
368 DEVICE_ATTR(sw_activity, S_IWUGO | S_IRUGO, ata_scsi_activity_show,
369 ata_scsi_activity_store);
370 EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
372 struct device_attribute *ata_common_sdev_attrs[] = {
373 &dev_attr_unload_heads,
376 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
378 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
379 void (*done)(struct scsi_cmnd *))
381 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
382 /* "Invalid field in cbd" */
387 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
388 * @sdev: SCSI device for which BIOS geometry is to be determined
389 * @bdev: block device associated with @sdev
390 * @capacity: capacity of SCSI device
391 * @geom: location to which geometry will be output
393 * Generic bios head/sector/cylinder calculator
394 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
395 * mapping. Some situations may arise where the disk is not
396 * bootable if this is not used.
399 * Defined by the SCSI layer. We don't really care.
404 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
405 sector_t capacity, int geom[])
409 sector_div(capacity, 255*63);
416 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
417 * @sdev: SCSI device to get identify data for
418 * @arg: User buffer area for identify data
421 * Defined by the SCSI layer. We don't really care.
424 * Zero on success, negative errno on error.
426 static int ata_get_identity(struct scsi_device *sdev, void __user *arg)
428 struct ata_port *ap = ata_shost_to_port(sdev->host);
429 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
430 u16 __user *dst = arg;
436 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
439 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
440 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
443 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
444 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
447 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
448 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
455 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
456 * @scsidev: Device to which we are issuing command
457 * @arg: User provided data for issuing command
460 * Defined by the SCSI layer. We don't really care.
463 * Zero on success, negative errno on error.
465 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
468 u8 scsi_cmd[MAX_COMMAND_SIZE];
469 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
471 enum dma_data_direction data_dir;
477 if (copy_from_user(args, arg, sizeof(args)))
480 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
484 memset(scsi_cmd, 0, sizeof(scsi_cmd));
487 argsize = SECTOR_SIZE * args[3];
488 argbuf = kmalloc(argsize, GFP_KERNEL);
489 if (argbuf == NULL) {
494 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
495 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
496 block count in sector count field */
497 data_dir = DMA_FROM_DEVICE;
499 scsi_cmd[1] = (3 << 1); /* Non-data */
500 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
504 scsi_cmd[0] = ATA_16;
506 scsi_cmd[4] = args[2];
507 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
508 scsi_cmd[6] = args[3];
509 scsi_cmd[8] = args[1];
513 scsi_cmd[6] = args[1];
515 scsi_cmd[14] = args[0];
517 /* Good values for timeout and retries? Values below
518 from scsi_ioctl_send_command() for default case... */
519 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
520 sensebuf, (10*HZ), 5, 0);
522 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
523 u8 *desc = sensebuf + 8;
524 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
526 /* If we set cc then ATA pass-through will cause a
527 * check condition even if no error. Filter that. */
528 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
529 struct scsi_sense_hdr sshdr;
530 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
532 if (sshdr.sense_key == 0 &&
533 sshdr.asc == 0 && sshdr.ascq == 0)
534 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
537 /* Send userspace a few ATA registers (same as drivers/ide) */
538 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
539 desc[0] == 0x09) { /* code is "ATA Descriptor" */
540 args[0] = desc[13]; /* status */
541 args[1] = desc[3]; /* error */
542 args[2] = desc[5]; /* sector count (0:7) */
543 if (copy_to_user(arg, args, sizeof(args)))
555 && copy_to_user(arg + sizeof(args), argbuf, argsize))
564 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
565 * @scsidev: Device to which we are issuing command
566 * @arg: User provided data for issuing command
569 * Defined by the SCSI layer. We don't really care.
572 * Zero on success, negative errno on error.
574 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
577 u8 scsi_cmd[MAX_COMMAND_SIZE];
578 u8 args[7], *sensebuf = NULL;
584 if (copy_from_user(args, arg, sizeof(args)))
587 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
591 memset(scsi_cmd, 0, sizeof(scsi_cmd));
592 scsi_cmd[0] = ATA_16;
593 scsi_cmd[1] = (3 << 1); /* Non-data */
594 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
595 scsi_cmd[4] = args[1];
596 scsi_cmd[6] = args[2];
597 scsi_cmd[8] = args[3];
598 scsi_cmd[10] = args[4];
599 scsi_cmd[12] = args[5];
600 scsi_cmd[13] = args[6] & 0x4f;
601 scsi_cmd[14] = args[0];
603 /* Good values for timeout and retries? Values below
604 from scsi_ioctl_send_command() for default case... */
605 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
606 sensebuf, (10*HZ), 5, 0);
608 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
609 u8 *desc = sensebuf + 8;
610 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
612 /* If we set cc then ATA pass-through will cause a
613 * check condition even if no error. Filter that. */
614 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
615 struct scsi_sense_hdr sshdr;
616 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
618 if (sshdr.sense_key == 0 &&
619 sshdr.asc == 0 && sshdr.ascq == 0)
620 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
623 /* Send userspace ATA registers */
624 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
625 desc[0] == 0x09) {/* code is "ATA Descriptor" */
626 args[0] = desc[13]; /* status */
627 args[1] = desc[3]; /* error */
628 args[2] = desc[5]; /* sector count (0:7) */
629 args[3] = desc[7]; /* lbal */
630 args[4] = desc[9]; /* lbam */
631 args[5] = desc[11]; /* lbah */
632 args[6] = desc[12]; /* select */
633 if (copy_to_user(arg, args, sizeof(args)))
648 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
650 int val = -EINVAL, rc = -EINVAL;
653 case ATA_IOC_GET_IO32:
655 if (copy_to_user(arg, &val, 1))
659 case ATA_IOC_SET_IO32:
660 val = (unsigned long) arg;
665 case HDIO_GET_IDENTITY:
666 return ata_get_identity(scsidev, arg);
669 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
671 return ata_cmd_ioctl(scsidev, arg);
673 case HDIO_DRIVE_TASK:
674 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
676 return ata_task_ioctl(scsidev, arg);
687 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
688 * @dev: ATA device to which the new command is attached
689 * @cmd: SCSI command that originated this ATA command
690 * @done: SCSI command completion function
692 * Obtain a reference to an unused ata_queued_cmd structure,
693 * which is the basic libata structure representing a single
694 * ATA command sent to the hardware.
696 * If a command was available, fill in the SCSI-specific
697 * portions of the structure with information on the
701 * spin_lock_irqsave(host lock)
704 * Command allocated, or %NULL if none available.
706 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
707 struct scsi_cmnd *cmd,
708 void (*done)(struct scsi_cmnd *))
710 struct ata_queued_cmd *qc;
712 if (cmd->request->tag != -1)
713 qc = ata_qc_new_init(dev, cmd->request->tag);
715 qc = ata_qc_new_init(dev, 0);
721 qc->sg = scsi_sglist(cmd);
722 qc->n_elem = scsi_sg_count(cmd);
724 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
731 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
733 struct scsi_cmnd *scmd = qc->scsicmd;
735 qc->extrabytes = scmd->request->extra_len;
736 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
740 * ata_dump_status - user friendly display of error info
741 * @id: id of the port in question
742 * @tf: ptr to filled out taskfile
744 * Decode and dump the ATA error/status registers for the user so
745 * that they have some idea what really happened at the non
746 * make-believe layer.
749 * inherited from caller
751 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
753 u8 stat = tf->command, err = tf->feature;
755 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
756 if (stat & ATA_BUSY) {
757 printk("Busy }\n"); /* Data is not valid in this case */
759 if (stat & 0x40) printk("DriveReady ");
760 if (stat & 0x20) printk("DeviceFault ");
761 if (stat & 0x10) printk("SeekComplete ");
762 if (stat & 0x08) printk("DataRequest ");
763 if (stat & 0x04) printk("CorrectedError ");
764 if (stat & 0x02) printk("Index ");
765 if (stat & 0x01) printk("Error ");
769 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
770 if (err & 0x04) printk("DriveStatusError ");
772 if (err & 0x04) printk("BadCRC ");
773 else printk("Sector ");
775 if (err & 0x40) printk("UncorrectableError ");
776 if (err & 0x10) printk("SectorIdNotFound ");
777 if (err & 0x02) printk("TrackZeroNotFound ");
778 if (err & 0x01) printk("AddrMarkNotFound ");
785 * ata_to_sense_error - convert ATA error to SCSI error
786 * @id: ATA device number
787 * @drv_stat: value contained in ATA status register
788 * @drv_err: value contained in ATA error register
789 * @sk: the sense key we'll fill out
790 * @asc: the additional sense code we'll fill out
791 * @ascq: the additional sense code qualifier we'll fill out
792 * @verbose: be verbose
794 * Converts an ATA error into a SCSI error. Fill out pointers to
795 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
796 * format sense blocks.
799 * spin_lock_irqsave(host lock)
801 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
802 u8 *asc, u8 *ascq, int verbose)
806 /* Based on the 3ware driver translation table */
807 static const unsigned char sense_table[][4] = {
809 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
811 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
813 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
814 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
815 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
816 /* MC|ID|ABRT|TRK0|MARK */
817 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
819 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
820 /* Bad address mark */
821 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
823 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
825 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
826 /* Media change request */
827 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
829 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
831 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
833 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
834 /* BBD - block marked bad */
835 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
836 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
838 static const unsigned char stat_table[][4] = {
839 /* Must be first because BUSY means no other bits valid */
840 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
841 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
842 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
843 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
844 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
848 * Is this an error we can process/parse
850 if (drv_stat & ATA_BUSY) {
851 drv_err = 0; /* Ignore the err bits, they're invalid */
855 /* Look for drv_err */
856 for (i = 0; sense_table[i][0] != 0xFF; i++) {
857 /* Look for best matches first */
858 if ((sense_table[i][0] & drv_err) ==
860 *sk = sense_table[i][1];
861 *asc = sense_table[i][2];
862 *ascq = sense_table[i][3];
866 /* No immediate match */
868 printk(KERN_WARNING "ata%u: no sense translation for "
869 "error 0x%02x\n", id, drv_err);
872 /* Fall back to interpreting status bits */
873 for (i = 0; stat_table[i][0] != 0xFF; i++) {
874 if (stat_table[i][0] & drv_stat) {
875 *sk = stat_table[i][1];
876 *asc = stat_table[i][2];
877 *ascq = stat_table[i][3];
881 /* No error? Undecoded? */
883 printk(KERN_WARNING "ata%u: no sense translation for "
884 "status: 0x%02x\n", id, drv_stat);
886 /* We need a sensible error return here, which is tricky, and one
887 that won't cause people to do things like return a disk wrongly */
888 *sk = ABORTED_COMMAND;
894 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
895 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
896 id, drv_stat, drv_err, *sk, *asc, *ascq);
901 * ata_gen_passthru_sense - Generate check condition sense block.
902 * @qc: Command that completed.
904 * This function is specific to the ATA descriptor format sense
905 * block specified for the ATA pass through commands. Regardless
906 * of whether the command errored or not, return a sense
907 * block. Copy all controller registers into the sense
908 * block. Clear sense key, ASC & ASCQ if there is no error.
913 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
915 struct scsi_cmnd *cmd = qc->scsicmd;
916 struct ata_taskfile *tf = &qc->result_tf;
917 unsigned char *sb = cmd->sense_buffer;
918 unsigned char *desc = sb + 8;
919 int verbose = qc->ap->ops->error_handler == NULL;
921 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
923 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
926 * Use ata_to_sense_error() to map status register bits
927 * onto sense key, asc & ascq.
930 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
931 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
932 &sb[1], &sb[2], &sb[3], verbose);
937 * Sense data is current and format is descriptor.
943 /* set length of additional sense data */
948 * Copy registers into sense buffer.
951 desc[3] = tf->feature; /* == error reg */
956 desc[12] = tf->device;
957 desc[13] = tf->command; /* == status reg */
960 * Fill in Extend bit, and the high order bytes
963 if (tf->flags & ATA_TFLAG_LBA48) {
965 desc[4] = tf->hob_nsect;
966 desc[6] = tf->hob_lbal;
967 desc[8] = tf->hob_lbam;
968 desc[10] = tf->hob_lbah;
973 * ata_gen_ata_sense - generate a SCSI fixed sense block
974 * @qc: Command that we are erroring out
976 * Generate sense block for a failed ATA command @qc. Descriptor
977 * format is used to accomodate LBA48 block address.
982 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
984 struct ata_device *dev = qc->dev;
985 struct scsi_cmnd *cmd = qc->scsicmd;
986 struct ata_taskfile *tf = &qc->result_tf;
987 unsigned char *sb = cmd->sense_buffer;
988 unsigned char *desc = sb + 8;
989 int verbose = qc->ap->ops->error_handler == NULL;
992 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
994 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
996 /* sense data is current and format is descriptor */
999 /* Use ata_to_sense_error() to map status register bits
1000 * onto sense key, asc & ascq.
1003 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1004 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1005 &sb[1], &sb[2], &sb[3], verbose);
1009 block = ata_tf_read_block(&qc->result_tf, dev);
1011 /* information sense data descriptor */
1016 desc[2] |= 0x80; /* valid */
1017 desc[6] = block >> 40;
1018 desc[7] = block >> 32;
1019 desc[8] = block >> 24;
1020 desc[9] = block >> 16;
1021 desc[10] = block >> 8;
1025 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1027 sdev->use_10_for_rw = 1;
1028 sdev->use_10_for_ms = 1;
1030 /* Schedule policy is determined by ->qc_defer() callback and
1031 * it needs to see every deferred qc. Set dev_blocked to 1 to
1032 * prevent SCSI midlayer from automatically deferring
1035 sdev->max_device_blocked = 1;
1039 * atapi_drain_needed - Check whether data transfer may overflow
1040 * @rq: request to be checked
1042 * ATAPI commands which transfer variable length data to host
1043 * might overflow due to application error or hardare bug. This
1044 * function checks whether overflow should be drained and ignored
1051 * 1 if ; otherwise, 0.
1053 static int atapi_drain_needed(struct request *rq)
1055 if (likely(!blk_pc_request(rq)))
1058 if (!rq->data_len || (rq->cmd_flags & REQ_RW))
1061 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1064 static int ata_scsi_dev_config(struct scsi_device *sdev,
1065 struct ata_device *dev)
1067 if (!ata_id_has_unload(dev->id))
1068 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1070 /* configure max sectors */
1071 blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
1073 if (dev->class == ATA_DEV_ATAPI) {
1074 struct request_queue *q = sdev->request_queue;
1077 /* set the min alignment and padding */
1078 blk_queue_update_dma_alignment(sdev->request_queue,
1079 ATA_DMA_PAD_SZ - 1);
1080 blk_queue_update_dma_pad(sdev->request_queue,
1081 ATA_DMA_PAD_SZ - 1);
1083 /* configure draining */
1084 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1086 ata_dev_printk(dev, KERN_ERR,
1087 "drain buffer allocation failed\n");
1091 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1093 if (ata_id_is_ssd(dev->id))
1094 queue_flag_set_unlocked(QUEUE_FLAG_NONROT,
1095 sdev->request_queue);
1097 /* ATA devices must be sector aligned */
1098 blk_queue_update_dma_alignment(sdev->request_queue,
1100 sdev->manage_start_stop = 1;
1103 if (dev->flags & ATA_DFLAG_AN)
1104 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1106 if (dev->flags & ATA_DFLAG_NCQ) {
1109 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1110 depth = min(ATA_MAX_QUEUE - 1, depth);
1113 * If this device is behind a port multiplier, we have
1114 * to share the tag map between all devices on that PMP.
1115 * Set up the shared tag map here and we get automatic.
1117 if (dev->link->ap->pmp_link)
1118 scsi_init_shared_tag_map(sdev->host, ATA_MAX_QUEUE - 1);
1120 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
1121 scsi_activate_tcq(sdev, depth);
1128 * ata_scsi_slave_config - Set SCSI device attributes
1129 * @sdev: SCSI device to examine
1131 * This is called before we actually start reading
1132 * and writing to the device, to configure certain
1133 * SCSI mid-layer behaviors.
1136 * Defined by SCSI layer. We don't really care.
1139 int ata_scsi_slave_config(struct scsi_device *sdev)
1141 struct ata_port *ap = ata_shost_to_port(sdev->host);
1142 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1145 ata_scsi_sdev_config(sdev);
1148 rc = ata_scsi_dev_config(sdev, dev);
1154 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1155 * @sdev: SCSI device to be destroyed
1157 * @sdev is about to be destroyed for hot/warm unplugging. If
1158 * this unplugging was initiated by libata as indicated by NULL
1159 * dev->sdev, this function doesn't have to do anything.
1160 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1161 * Clear dev->sdev, schedule the device for ATA detach and invoke
1165 * Defined by SCSI layer. We don't really care.
1167 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1169 struct ata_port *ap = ata_shost_to_port(sdev->host);
1170 struct request_queue *q = sdev->request_queue;
1171 unsigned long flags;
1172 struct ata_device *dev;
1174 if (!ap->ops->error_handler)
1177 spin_lock_irqsave(ap->lock, flags);
1178 dev = __ata_scsi_find_dev(ap, sdev);
1179 if (dev && dev->sdev) {
1180 /* SCSI device already in CANCEL state, no need to offline it */
1182 dev->flags |= ATA_DFLAG_DETACH;
1183 ata_port_schedule_eh(ap);
1185 spin_unlock_irqrestore(ap->lock, flags);
1187 kfree(q->dma_drain_buffer);
1188 q->dma_drain_buffer = NULL;
1189 q->dma_drain_size = 0;
1193 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1194 * @sdev: SCSI device to configure queue depth for
1195 * @queue_depth: new queue depth
1197 * This is libata standard hostt->change_queue_depth callback.
1198 * SCSI will call into this callback when user tries to set queue
1202 * SCSI layer (we don't care)
1205 * Newly configured queue depth.
1207 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1209 struct ata_port *ap = ata_shost_to_port(sdev->host);
1210 struct ata_device *dev;
1211 unsigned long flags;
1213 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1214 return sdev->queue_depth;
1216 dev = ata_scsi_find_dev(ap, sdev);
1217 if (!dev || !ata_dev_enabled(dev))
1218 return sdev->queue_depth;
1221 spin_lock_irqsave(ap->lock, flags);
1222 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1223 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1224 dev->flags |= ATA_DFLAG_NCQ_OFF;
1227 spin_unlock_irqrestore(ap->lock, flags);
1229 /* limit and apply queue depth */
1230 queue_depth = min(queue_depth, sdev->host->can_queue);
1231 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1232 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1234 if (sdev->queue_depth == queue_depth)
1237 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
1241 /* XXX: for spindown warning */
1242 static void ata_delayed_done_timerfn(unsigned long arg)
1244 struct scsi_cmnd *scmd = (void *)arg;
1246 scmd->scsi_done(scmd);
1249 /* XXX: for spindown warning */
1250 static void ata_delayed_done(struct scsi_cmnd *scmd)
1252 static struct timer_list timer;
1254 setup_timer(&timer, ata_delayed_done_timerfn, (unsigned long)scmd);
1255 mod_timer(&timer, jiffies + 5 * HZ);
1259 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1260 * @qc: Storage for translated ATA taskfile
1262 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1263 * (to start). Perhaps these commands should be preceded by
1264 * CHECK POWER MODE to see what power mode the device is already in.
1265 * [See SAT revision 5 at www.t10.org]
1268 * spin_lock_irqsave(host lock)
1271 * Zero on success, non-zero on error.
1273 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1275 struct scsi_cmnd *scmd = qc->scsicmd;
1276 struct ata_taskfile *tf = &qc->tf;
1277 const u8 *cdb = scmd->cmnd;
1279 if (scmd->cmd_len < 5)
1282 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1283 tf->protocol = ATA_PROT_NODATA;
1285 ; /* ignore IMMED bit, violates sat-r05 */
1288 goto invalid_fld; /* LOEJ bit set not supported */
1289 if (((cdb[4] >> 4) & 0xf) != 0)
1290 goto invalid_fld; /* power conditions not supported */
1293 tf->nsect = 1; /* 1 sector, lba=0 */
1295 if (qc->dev->flags & ATA_DFLAG_LBA) {
1296 tf->flags |= ATA_TFLAG_LBA;
1301 tf->device |= ATA_LBA;
1304 tf->lbal = 0x1; /* sect */
1305 tf->lbam = 0x0; /* cyl low */
1306 tf->lbah = 0x0; /* cyl high */
1309 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1311 /* XXX: This is for backward compatibility, will be
1312 * removed. Read Documentation/feature-removal-schedule.txt
1315 if ((qc->dev->flags & ATA_DFLAG_SPUNDOWN) &&
1316 (system_state == SYSTEM_HALT ||
1317 system_state == SYSTEM_POWER_OFF)) {
1318 static unsigned long warned;
1320 if (!test_and_set_bit(0, &warned)) {
1321 ata_dev_printk(qc->dev, KERN_WARNING,
1322 "DISK MIGHT NOT BE SPUN DOWN PROPERLY. "
1323 "UPDATE SHUTDOWN UTILITY\n");
1324 ata_dev_printk(qc->dev, KERN_WARNING,
1325 "For more info, visit "
1326 "http://linux-ata.org/shutdown.html\n");
1328 /* ->scsi_done is not used, use it for
1329 * delayed completion.
1331 scmd->scsi_done = qc->scsidone;
1332 qc->scsidone = ata_delayed_done;
1334 scmd->result = SAM_STAT_GOOD;
1338 /* Issue ATA STANDBY IMMEDIATE command */
1339 tf->command = ATA_CMD_STANDBYNOW1;
1343 * Standby and Idle condition timers could be implemented but that
1344 * would require libata to implement the Power condition mode page
1345 * and allow the user to change it. Changing mode pages requires
1346 * MODE SELECT to be implemented.
1352 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1353 /* "Invalid field in cbd" */
1359 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1360 * @qc: Storage for translated ATA taskfile
1362 * Sets up an ATA taskfile to issue FLUSH CACHE or
1366 * spin_lock_irqsave(host lock)
1369 * Zero on success, non-zero on error.
1371 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1373 struct ata_taskfile *tf = &qc->tf;
1375 tf->flags |= ATA_TFLAG_DEVICE;
1376 tf->protocol = ATA_PROT_NODATA;
1378 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1379 tf->command = ATA_CMD_FLUSH_EXT;
1381 tf->command = ATA_CMD_FLUSH;
1383 /* flush is critical for IO integrity, consider it an IO command */
1384 qc->flags |= ATA_QCFLAG_IO;
1390 * scsi_6_lba_len - Get LBA and transfer length
1391 * @cdb: SCSI command to translate
1393 * Calculate LBA and transfer length for 6-byte commands.
1397 * @plen: the transfer length
1399 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1404 VPRINTK("six-byte command\n");
1406 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1407 lba |= ((u64)cdb[2]) << 8;
1408 lba |= ((u64)cdb[3]);
1417 * scsi_10_lba_len - Get LBA and transfer length
1418 * @cdb: SCSI command to translate
1420 * Calculate LBA and transfer length for 10-byte commands.
1424 * @plen: the transfer length
1426 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1431 VPRINTK("ten-byte command\n");
1433 lba |= ((u64)cdb[2]) << 24;
1434 lba |= ((u64)cdb[3]) << 16;
1435 lba |= ((u64)cdb[4]) << 8;
1436 lba |= ((u64)cdb[5]);
1438 len |= ((u32)cdb[7]) << 8;
1439 len |= ((u32)cdb[8]);
1446 * scsi_16_lba_len - Get LBA and transfer length
1447 * @cdb: SCSI command to translate
1449 * Calculate LBA and transfer length for 16-byte commands.
1453 * @plen: the transfer length
1455 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1460 VPRINTK("sixteen-byte command\n");
1462 lba |= ((u64)cdb[2]) << 56;
1463 lba |= ((u64)cdb[3]) << 48;
1464 lba |= ((u64)cdb[4]) << 40;
1465 lba |= ((u64)cdb[5]) << 32;
1466 lba |= ((u64)cdb[6]) << 24;
1467 lba |= ((u64)cdb[7]) << 16;
1468 lba |= ((u64)cdb[8]) << 8;
1469 lba |= ((u64)cdb[9]);
1471 len |= ((u32)cdb[10]) << 24;
1472 len |= ((u32)cdb[11]) << 16;
1473 len |= ((u32)cdb[12]) << 8;
1474 len |= ((u32)cdb[13]);
1481 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1482 * @qc: Storage for translated ATA taskfile
1484 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1487 * spin_lock_irqsave(host lock)
1490 * Zero on success, non-zero on error.
1492 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1494 struct scsi_cmnd *scmd = qc->scsicmd;
1495 struct ata_taskfile *tf = &qc->tf;
1496 struct ata_device *dev = qc->dev;
1497 u64 dev_sectors = qc->dev->n_sectors;
1498 const u8 *cdb = scmd->cmnd;
1502 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1503 tf->protocol = ATA_PROT_NODATA;
1505 if (cdb[0] == VERIFY) {
1506 if (scmd->cmd_len < 10)
1508 scsi_10_lba_len(cdb, &block, &n_block);
1509 } else if (cdb[0] == VERIFY_16) {
1510 if (scmd->cmd_len < 16)
1512 scsi_16_lba_len(cdb, &block, &n_block);
1518 if (block >= dev_sectors)
1520 if ((block + n_block) > dev_sectors)
1523 if (dev->flags & ATA_DFLAG_LBA) {
1524 tf->flags |= ATA_TFLAG_LBA;
1526 if (lba_28_ok(block, n_block)) {
1528 tf->command = ATA_CMD_VERIFY;
1529 tf->device |= (block >> 24) & 0xf;
1530 } else if (lba_48_ok(block, n_block)) {
1531 if (!(dev->flags & ATA_DFLAG_LBA48))
1535 tf->flags |= ATA_TFLAG_LBA48;
1536 tf->command = ATA_CMD_VERIFY_EXT;
1538 tf->hob_nsect = (n_block >> 8) & 0xff;
1540 tf->hob_lbah = (block >> 40) & 0xff;
1541 tf->hob_lbam = (block >> 32) & 0xff;
1542 tf->hob_lbal = (block >> 24) & 0xff;
1544 /* request too large even for LBA48 */
1547 tf->nsect = n_block & 0xff;
1549 tf->lbah = (block >> 16) & 0xff;
1550 tf->lbam = (block >> 8) & 0xff;
1551 tf->lbal = block & 0xff;
1553 tf->device |= ATA_LBA;
1556 u32 sect, head, cyl, track;
1558 if (!lba_28_ok(block, n_block))
1561 /* Convert LBA to CHS */
1562 track = (u32)block / dev->sectors;
1563 cyl = track / dev->heads;
1564 head = track % dev->heads;
1565 sect = (u32)block % dev->sectors + 1;
1567 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1568 (u32)block, track, cyl, head, sect);
1570 /* Check whether the converted CHS can fit.
1574 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1577 tf->command = ATA_CMD_VERIFY;
1578 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1581 tf->lbah = cyl >> 8;
1588 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1589 /* "Invalid field in cbd" */
1593 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1594 /* "Logical Block Address out of range" */
1598 scmd->result = SAM_STAT_GOOD;
1603 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1604 * @qc: Storage for translated ATA taskfile
1606 * Converts any of six SCSI read/write commands into the
1607 * ATA counterpart, including starting sector (LBA),
1608 * sector count, and taking into account the device's LBA48
1611 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1612 * %WRITE_16 are currently supported.
1615 * spin_lock_irqsave(host lock)
1618 * Zero on success, non-zero on error.
1620 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1622 struct scsi_cmnd *scmd = qc->scsicmd;
1623 const u8 *cdb = scmd->cmnd;
1624 unsigned int tf_flags = 0;
1629 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1630 tf_flags |= ATA_TFLAG_WRITE;
1632 /* Calculate the SCSI LBA, transfer length and FUA. */
1636 if (unlikely(scmd->cmd_len < 10))
1638 scsi_10_lba_len(cdb, &block, &n_block);
1639 if (unlikely(cdb[1] & (1 << 3)))
1640 tf_flags |= ATA_TFLAG_FUA;
1644 if (unlikely(scmd->cmd_len < 6))
1646 scsi_6_lba_len(cdb, &block, &n_block);
1648 /* for 6-byte r/w commands, transfer length 0
1649 * means 256 blocks of data, not 0 block.
1656 if (unlikely(scmd->cmd_len < 16))
1658 scsi_16_lba_len(cdb, &block, &n_block);
1659 if (unlikely(cdb[1] & (1 << 3)))
1660 tf_flags |= ATA_TFLAG_FUA;
1663 DPRINTK("no-byte command\n");
1667 /* Check and compose ATA command */
1669 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1670 * length 0 means transfer 0 block of data.
1671 * However, for ATA R/W commands, sector count 0 means
1672 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1674 * WARNING: one or two older ATA drives treat 0 as 0...
1678 qc->flags |= ATA_QCFLAG_IO;
1679 qc->nbytes = n_block * ATA_SECT_SIZE;
1681 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1683 if (likely(rc == 0))
1688 /* treat all other errors as -EINVAL, fall through */
1690 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1691 /* "Invalid field in cbd" */
1695 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1696 /* "Logical Block Address out of range" */
1700 scmd->result = SAM_STAT_GOOD;
1704 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1706 struct ata_port *ap = qc->ap;
1707 struct scsi_cmnd *cmd = qc->scsicmd;
1708 u8 *cdb = cmd->cmnd;
1709 int need_sense = (qc->err_mask != 0);
1711 /* For ATA pass thru (SAT) commands, generate a sense block if
1712 * user mandated it or if there's an error. Note that if we
1713 * generate because the user forced us to, a check condition
1714 * is generated and the ATA register values are returned
1715 * whether the command completed successfully or not. If there
1716 * was no error, SK, ASC and ASCQ will all be zero.
1718 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1719 ((cdb[2] & 0x20) || need_sense)) {
1720 ata_gen_passthru_sense(qc);
1723 cmd->result = SAM_STAT_GOOD;
1725 /* TODO: decide which descriptor format to use
1726 * for 48b LBA devices and call that here
1727 * instead of the fixed desc, which is only
1728 * good for smaller LBA (and maybe CHS?)
1731 ata_gen_ata_sense(qc);
1735 /* XXX: track spindown state for spindown skipping and warning */
1736 if (unlikely(qc->tf.command == ATA_CMD_STANDBY ||
1737 qc->tf.command == ATA_CMD_STANDBYNOW1))
1738 qc->dev->flags |= ATA_DFLAG_SPUNDOWN;
1739 else if (likely(system_state != SYSTEM_HALT &&
1740 system_state != SYSTEM_POWER_OFF))
1741 qc->dev->flags &= ~ATA_DFLAG_SPUNDOWN;
1743 if (need_sense && !ap->ops->error_handler)
1744 ata_dump_status(ap->print_id, &qc->result_tf);
1752 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1753 * @dev: ATA device to which the command is addressed
1754 * @cmd: SCSI command to execute
1755 * @done: SCSI command completion function
1756 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1758 * Our ->queuecommand() function has decided that the SCSI
1759 * command issued can be directly translated into an ATA
1760 * command, rather than handled internally.
1762 * This function sets up an ata_queued_cmd structure for the
1763 * SCSI command, and sends that ata_queued_cmd to the hardware.
1765 * The xlat_func argument (actor) returns 0 if ready to execute
1766 * ATA command, else 1 to finish translation. If 1 is returned
1767 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1768 * to be set reflecting an error condition or clean (early)
1772 * spin_lock_irqsave(host lock)
1775 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1776 * needs to be deferred.
1778 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1779 void (*done)(struct scsi_cmnd *),
1780 ata_xlat_func_t xlat_func)
1782 struct ata_port *ap = dev->link->ap;
1783 struct ata_queued_cmd *qc;
1788 qc = ata_scsi_qc_new(dev, cmd, done);
1792 /* data is present; dma-map it */
1793 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1794 cmd->sc_data_direction == DMA_TO_DEVICE) {
1795 if (unlikely(scsi_bufflen(cmd) < 1)) {
1796 ata_dev_printk(dev, KERN_WARNING,
1797 "WARNING: zero len r/w req\n");
1801 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1803 qc->dma_dir = cmd->sc_data_direction;
1806 qc->complete_fn = ata_scsi_qc_complete;
1811 if (ap->ops->qc_defer) {
1812 if ((rc = ap->ops->qc_defer(qc)))
1816 /* select device, send command to hardware */
1825 DPRINTK("EXIT - early finish (good or error)\n");
1830 cmd->result = (DID_ERROR << 16);
1833 DPRINTK("EXIT - internal\n");
1838 DPRINTK("EXIT - defer\n");
1839 if (rc == ATA_DEFER_LINK)
1840 return SCSI_MLQUEUE_DEVICE_BUSY;
1842 return SCSI_MLQUEUE_HOST_BUSY;
1846 * ata_scsi_rbuf_get - Map response buffer.
1847 * @cmd: SCSI command containing buffer to be mapped.
1848 * @flags: unsigned long variable to store irq enable status
1849 * @copy_in: copy in from user buffer
1851 * Prepare buffer for simulated SCSI commands.
1854 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1857 * Pointer to response buffer.
1859 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1860 unsigned long *flags)
1862 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1864 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1866 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1867 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1868 return ata_scsi_rbuf;
1872 * ata_scsi_rbuf_put - Unmap response buffer.
1873 * @cmd: SCSI command containing buffer to be unmapped.
1874 * @copy_out: copy out result
1875 * @flags: @flags passed to ata_scsi_rbuf_get()
1877 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1878 * @copy_back is true.
1881 * Unlocks ata_scsi_rbuf_lock.
1883 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1884 unsigned long *flags)
1887 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1888 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1889 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1893 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1894 * @args: device IDENTIFY data / SCSI command of interest.
1895 * @actor: Callback hook for desired SCSI command simulator
1897 * Takes care of the hard work of simulating a SCSI command...
1898 * Mapping the response buffer, calling the command's handler,
1899 * and handling the handler's return value. This return value
1900 * indicates whether the handler wishes the SCSI command to be
1901 * completed successfully (0), or not (in which case cmd->result
1902 * and sense buffer are assumed to be set).
1905 * spin_lock_irqsave(host lock)
1907 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1908 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1912 struct scsi_cmnd *cmd = args->cmd;
1913 unsigned long flags;
1915 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1916 rc = actor(args, rbuf);
1917 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
1920 cmd->result = SAM_STAT_GOOD;
1925 * ata_scsiop_inq_std - Simulate INQUIRY command
1926 * @args: device IDENTIFY data / SCSI command of interest.
1927 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1929 * Returns standard device identification data associated
1930 * with non-VPD INQUIRY command output.
1933 * spin_lock_irqsave(host lock)
1935 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1937 const u8 versions[] = {
1938 0x60, /* SAM-3 (no version claimed) */
1941 0x20, /* SBC-2 (no version claimed) */
1944 0x60 /* SPC-3 (no version claimed) */
1949 0x5, /* claim SPC-3 version compatibility */
1956 /* set scsi removeable (RMB) bit per ata bit */
1957 if (ata_id_removeable(args->id))
1960 memcpy(rbuf, hdr, sizeof(hdr));
1962 /* if ncq, set tags supported */
1963 if (ata_id_has_ncq(args->id))
1964 rbuf[7] |= (1 << 1);
1966 memcpy(&rbuf[8], "ATA ", 8);
1967 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1968 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1970 if (rbuf[32] == 0 || rbuf[32] == ' ')
1971 memcpy(&rbuf[32], "n/a ", 4);
1973 memcpy(rbuf + 59, versions, sizeof(versions));
1979 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1980 * @args: device IDENTIFY data / SCSI command of interest.
1981 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1983 * Returns list of inquiry VPD pages available.
1986 * spin_lock_irqsave(host lock)
1988 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
1990 const u8 pages[] = {
1991 0x00, /* page 0x00, this page */
1992 0x80, /* page 0x80, unit serial no page */
1993 0x83, /* page 0x83, device ident page */
1994 0x89, /* page 0x89, ata info page */
1995 0xb1, /* page 0xb1, block device characteristics page */
1998 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
1999 memcpy(rbuf + 4, pages, sizeof(pages));
2004 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2005 * @args: device IDENTIFY data / SCSI command of interest.
2006 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2008 * Returns ATA device serial number.
2011 * spin_lock_irqsave(host lock)
2013 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2017 0x80, /* this page code */
2019 ATA_ID_SERNO_LEN, /* page len */
2022 memcpy(rbuf, hdr, sizeof(hdr));
2023 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2024 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2029 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2030 * @args: device IDENTIFY data / SCSI command of interest.
2031 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2033 * Yields two logical unit device identification designators:
2034 * - vendor specific ASCII containing the ATA serial number
2035 * - SAT defined "t10 vendor id based" containing ASCII vendor
2036 * name ("ATA "), model and serial numbers.
2039 * spin_lock_irqsave(host lock)
2041 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2043 const int sat_model_serial_desc_len = 68;
2046 rbuf[1] = 0x83; /* this page code */
2049 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2051 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2053 ata_id_string(args->id, (unsigned char *) rbuf + num,
2054 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2055 num += ATA_ID_SERNO_LEN;
2057 /* SAT defined lu model and serial numbers descriptor */
2058 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2061 rbuf[num + 3] = sat_model_serial_desc_len;
2063 memcpy(rbuf + num, "ATA ", 8);
2065 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2067 num += ATA_ID_PROD_LEN;
2068 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2070 num += ATA_ID_SERNO_LEN;
2072 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2077 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2078 * @args: device IDENTIFY data / SCSI command of interest.
2079 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2081 * Yields SAT-specified ATA VPD page.
2084 * spin_lock_irqsave(host lock)
2086 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2088 struct ata_taskfile tf;
2090 memset(&tf, 0, sizeof(tf));
2092 rbuf[1] = 0x89; /* our page code */
2093 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2094 rbuf[3] = (0x238 & 0xff);
2096 memcpy(&rbuf[8], "linux ", 8);
2097 memcpy(&rbuf[16], "libata ", 16);
2098 memcpy(&rbuf[32], DRV_VERSION, 4);
2099 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2101 /* we don't store the ATA device signature, so we fake it */
2103 tf.command = ATA_DRDY; /* really, this is Status reg */
2107 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2108 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2110 rbuf[56] = ATA_CMD_ID_ATA;
2112 memcpy(&rbuf[60], &args->id[0], 512);
2116 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2120 if (ata_id_major_version(args->id) > 7) {
2121 rbuf[4] = args->id[217] >> 8;
2122 rbuf[5] = args->id[217];
2123 rbuf[7] = args->id[168] & 0xf;
2130 * ata_scsiop_noop - Command handler that simply returns success.
2131 * @args: device IDENTIFY data / SCSI command of interest.
2132 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2134 * No operation. Simply returns success to caller, to indicate
2135 * that the caller should successfully complete this SCSI command.
2138 * spin_lock_irqsave(host lock)
2140 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
2147 * ata_msense_caching - Simulate MODE SENSE caching info page
2148 * @id: device IDENTIFY data
2149 * @buf: output buffer
2151 * Generate a caching info page, which conditionally indicates
2152 * write caching to the SCSI layer, depending on device
2158 static unsigned int ata_msense_caching(u16 *id, u8 *buf)
2160 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
2161 if (ata_id_wcache_enabled(id))
2162 buf[2] |= (1 << 2); /* write cache enable */
2163 if (!ata_id_rahead_enabled(id))
2164 buf[12] |= (1 << 5); /* disable read ahead */
2165 return sizeof(def_cache_mpage);
2169 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2170 * @buf: output buffer
2172 * Generate a generic MODE SENSE control mode page.
2177 static unsigned int ata_msense_ctl_mode(u8 *buf)
2179 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
2180 return sizeof(def_control_mpage);
2184 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2185 * @buf: output buffer
2187 * Generate a generic MODE SENSE r/w error recovery page.
2192 static unsigned int ata_msense_rw_recovery(u8 *buf)
2194 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
2195 return sizeof(def_rw_recovery_mpage);
2199 * We can turn this into a real blacklist if it's needed, for now just
2200 * blacklist any Maxtor BANC1G10 revision firmware
2202 static int ata_dev_supports_fua(u16 *id)
2204 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2208 if (!ata_id_has_fua(id))
2211 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2212 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2214 if (strcmp(model, "Maxtor"))
2216 if (strcmp(fw, "BANC1G10"))
2219 return 0; /* blacklisted */
2223 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2224 * @args: device IDENTIFY data / SCSI command of interest.
2225 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2227 * Simulate MODE SENSE commands. Assume this is invoked for direct
2228 * access devices (e.g. disks) only. There should be no block
2229 * descriptor for other device types.
2232 * spin_lock_irqsave(host lock)
2234 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2236 struct ata_device *dev = args->dev;
2237 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2238 const u8 sat_blk_desc[] = {
2239 0, 0, 0, 0, /* number of blocks: sat unspecified */
2241 0, 0x2, 0x0 /* block length: 512 bytes */
2244 unsigned int ebd, page_control, six_byte;
2249 six_byte = (scsicmd[0] == MODE_SENSE);
2250 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2252 * LLBA bit in msense(10) ignored (compliant)
2255 page_control = scsicmd[2] >> 6;
2256 switch (page_control) {
2257 case 0: /* current */
2258 break; /* supported */
2260 goto saving_not_supp;
2261 case 1: /* changeable */
2262 case 2: /* defaults */
2268 p += 4 + (ebd ? 8 : 0);
2270 p += 8 + (ebd ? 8 : 0);
2272 pg = scsicmd[2] & 0x3f;
2275 * No mode subpages supported (yet) but asking for _all_
2276 * subpages may be valid
2278 if (spg && (spg != ALL_SUB_MPAGES))
2282 case RW_RECOVERY_MPAGE:
2283 p += ata_msense_rw_recovery(p);
2287 p += ata_msense_caching(args->id, p);
2291 p += ata_msense_ctl_mode(p);
2295 p += ata_msense_rw_recovery(p);
2296 p += ata_msense_caching(args->id, p);
2297 p += ata_msense_ctl_mode(p);
2300 default: /* invalid page code */
2305 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2306 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2310 rbuf[0] = p - rbuf - 1;
2313 rbuf[3] = sizeof(sat_blk_desc);
2314 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2317 unsigned int output_len = p - rbuf - 2;
2319 rbuf[0] = output_len >> 8;
2320 rbuf[1] = output_len;
2323 rbuf[7] = sizeof(sat_blk_desc);
2324 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2330 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2331 /* "Invalid field in cbd" */
2335 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2336 /* "Saving parameters not supported" */
2341 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2342 * @args: device IDENTIFY data / SCSI command of interest.
2343 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2345 * Simulate READ CAPACITY commands.
2350 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2352 u64 last_lba = args->dev->n_sectors - 1; /* LBA of the last block */
2356 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2357 if (last_lba >= 0xffffffffULL)
2358 last_lba = 0xffffffff;
2360 /* sector count, 32-bit */
2361 rbuf[0] = last_lba >> (8 * 3);
2362 rbuf[1] = last_lba >> (8 * 2);
2363 rbuf[2] = last_lba >> (8 * 1);
2367 rbuf[6] = ATA_SECT_SIZE >> 8;
2368 rbuf[7] = ATA_SECT_SIZE & 0xff;
2370 /* sector count, 64-bit */
2371 rbuf[0] = last_lba >> (8 * 7);
2372 rbuf[1] = last_lba >> (8 * 6);
2373 rbuf[2] = last_lba >> (8 * 5);
2374 rbuf[3] = last_lba >> (8 * 4);
2375 rbuf[4] = last_lba >> (8 * 3);
2376 rbuf[5] = last_lba >> (8 * 2);
2377 rbuf[6] = last_lba >> (8 * 1);
2381 rbuf[10] = ATA_SECT_SIZE >> 8;
2382 rbuf[11] = ATA_SECT_SIZE & 0xff;
2389 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2390 * @args: device IDENTIFY data / SCSI command of interest.
2391 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2393 * Simulate REPORT LUNS command.
2396 * spin_lock_irqsave(host lock)
2398 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2401 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2406 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2408 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2409 /* FIXME: not quite right; we don't want the
2410 * translation of taskfile registers into
2411 * a sense descriptors, since that's only
2412 * correct for ATA, not ATAPI
2414 ata_gen_passthru_sense(qc);
2417 qc->scsidone(qc->scsicmd);
2421 /* is it pointless to prefer PIO for "safety reasons"? */
2422 static inline int ata_pio_use_silly(struct ata_port *ap)
2424 return (ap->flags & ATA_FLAG_PIO_DMA);
2427 static void atapi_request_sense(struct ata_queued_cmd *qc)
2429 struct ata_port *ap = qc->ap;
2430 struct scsi_cmnd *cmd = qc->scsicmd;
2432 DPRINTK("ATAPI request sense\n");
2434 /* FIXME: is this needed? */
2435 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2437 #ifdef CONFIG_ATA_SFF
2438 if (ap->ops->sff_tf_read)
2439 ap->ops->sff_tf_read(ap, &qc->tf);
2442 /* fill these in, for the case where they are -not- overwritten */
2443 cmd->sense_buffer[0] = 0x70;
2444 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2448 /* setup sg table and init transfer direction */
2449 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2450 ata_sg_init(qc, &qc->sgent, 1);
2451 qc->dma_dir = DMA_FROM_DEVICE;
2453 memset(&qc->cdb, 0, qc->dev->cdb_len);
2454 qc->cdb[0] = REQUEST_SENSE;
2455 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2457 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2458 qc->tf.command = ATA_CMD_PACKET;
2460 if (ata_pio_use_silly(ap)) {
2461 qc->tf.protocol = ATAPI_PROT_DMA;
2462 qc->tf.feature |= ATAPI_PKT_DMA;
2464 qc->tf.protocol = ATAPI_PROT_PIO;
2465 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2468 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2470 qc->complete_fn = atapi_sense_complete;
2477 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2479 struct scsi_cmnd *cmd = qc->scsicmd;
2480 unsigned int err_mask = qc->err_mask;
2482 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2484 /* handle completion from new EH */
2485 if (unlikely(qc->ap->ops->error_handler &&
2486 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2488 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2489 /* FIXME: not quite right; we don't want the
2490 * translation of taskfile registers into a
2491 * sense descriptors, since that's only
2492 * correct for ATA, not ATAPI
2494 ata_gen_passthru_sense(qc);
2497 /* SCSI EH automatically locks door if sdev->locked is
2498 * set. Sometimes door lock request continues to
2499 * fail, for example, when no media is present. This
2500 * creates a loop - SCSI EH issues door lock which
2501 * fails and gets invoked again to acquire sense data
2502 * for the failed command.
2504 * If door lock fails, always clear sdev->locked to
2505 * avoid this infinite loop.
2507 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL)
2508 qc->dev->sdev->locked = 0;
2510 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2516 /* successful completion or old EH failure path */
2517 if (unlikely(err_mask & AC_ERR_DEV)) {
2518 cmd->result = SAM_STAT_CHECK_CONDITION;
2519 atapi_request_sense(qc);
2521 } else if (unlikely(err_mask)) {
2522 /* FIXME: not quite right; we don't want the
2523 * translation of taskfile registers into
2524 * a sense descriptors, since that's only
2525 * correct for ATA, not ATAPI
2527 ata_gen_passthru_sense(qc);
2529 u8 *scsicmd = cmd->cmnd;
2531 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2532 unsigned long flags;
2535 buf = ata_scsi_rbuf_get(cmd, true, &flags);
2537 /* ATAPI devices typically report zero for their SCSI version,
2538 * and sometimes deviate from the spec WRT response data
2539 * format. If SCSI version is reported as zero like normal,
2540 * then we make the following fixups: 1) Fake MMC-5 version,
2541 * to indicate to the Linux scsi midlayer this is a modern
2542 * device. 2) Ensure response data format / ATAPI information
2543 * are always correct.
2550 ata_scsi_rbuf_put(cmd, true, &flags);
2553 cmd->result = SAM_STAT_GOOD;
2560 * atapi_xlat - Initialize PACKET taskfile
2561 * @qc: command structure to be initialized
2564 * spin_lock_irqsave(host lock)
2567 * Zero on success, non-zero on failure.
2569 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2571 struct scsi_cmnd *scmd = qc->scsicmd;
2572 struct ata_device *dev = qc->dev;
2573 int nodata = (scmd->sc_data_direction == DMA_NONE);
2574 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2575 unsigned int nbytes;
2577 memset(qc->cdb, 0, dev->cdb_len);
2578 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2580 qc->complete_fn = atapi_qc_complete;
2582 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2583 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2584 qc->tf.flags |= ATA_TFLAG_WRITE;
2585 DPRINTK("direction: write\n");
2588 qc->tf.command = ATA_CMD_PACKET;
2589 ata_qc_set_pc_nbytes(qc);
2591 /* check whether ATAPI DMA is safe */
2592 if (!nodata && !using_pio && atapi_check_dma(qc))
2595 /* Some controller variants snoop this value for Packet
2596 * transfers to do state machine and FIFO management. Thus we
2597 * want to set it properly, and for DMA where it is
2598 * effectively meaningless.
2600 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2602 /* Most ATAPI devices which honor transfer chunk size don't
2603 * behave according to the spec when odd chunk size which
2604 * matches the transfer length is specified. If the number of
2605 * bytes to transfer is 2n+1. According to the spec, what
2606 * should happen is to indicate that 2n+1 is going to be
2607 * transferred and transfer 2n+2 bytes where the last byte is
2610 * In practice, this doesn't happen. ATAPI devices first
2611 * indicate and transfer 2n bytes and then indicate and
2612 * transfer 2 bytes where the last byte is padding.
2614 * This inconsistency confuses several controllers which
2615 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2616 * These controllers use actual number of transferred bytes to
2617 * update DMA poitner and transfer of 4n+2 bytes make those
2618 * controller push DMA pointer by 4n+4 bytes because SATA data
2619 * FISes are aligned to 4 bytes. This causes data corruption
2620 * and buffer overrun.
2622 * Always setting nbytes to even number solves this problem
2623 * because then ATAPI devices don't have to split data at 2n
2629 qc->tf.lbam = (nbytes & 0xFF);
2630 qc->tf.lbah = (nbytes >> 8);
2633 qc->tf.protocol = ATAPI_PROT_NODATA;
2635 qc->tf.protocol = ATAPI_PROT_PIO;
2638 qc->tf.protocol = ATAPI_PROT_DMA;
2639 qc->tf.feature |= ATAPI_PKT_DMA;
2641 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2642 (scmd->sc_data_direction != DMA_TO_DEVICE))
2643 /* some SATA bridges need us to indicate data xfer direction */
2644 qc->tf.feature |= ATAPI_DMADIR;
2648 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2649 as ATAPI tape drives don't get this right otherwise */
2653 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2655 if (!sata_pmp_attached(ap)) {
2656 if (likely(devno < ata_link_max_devices(&ap->link)))
2657 return &ap->link.device[devno];
2659 if (likely(devno < ap->nr_pmp_links))
2660 return &ap->pmp_link[devno].device[0];
2666 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2667 const struct scsi_device *scsidev)
2671 /* skip commands not addressed to targets we simulate */
2672 if (!sata_pmp_attached(ap)) {
2673 if (unlikely(scsidev->channel || scsidev->lun))
2675 devno = scsidev->id;
2677 if (unlikely(scsidev->id || scsidev->lun))
2679 devno = scsidev->channel;
2682 return ata_find_dev(ap, devno);
2686 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2687 * @ap: ATA port to which the device is attached
2688 * @scsidev: SCSI device from which we derive the ATA device
2690 * Given various information provided in struct scsi_cmnd,
2691 * map that onto an ATA bus, and using that mapping
2692 * determine which ata_device is associated with the
2693 * SCSI command to be sent.
2696 * spin_lock_irqsave(host lock)
2699 * Associated ATA device, or %NULL if not found.
2701 static struct ata_device *
2702 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2704 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2706 if (unlikely(!dev || !ata_dev_enabled(dev)))
2713 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2714 * @byte1: Byte 1 from pass-thru CDB.
2717 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2720 ata_scsi_map_proto(u8 byte1)
2722 switch((byte1 & 0x1e) >> 1) {
2723 case 3: /* Non-data */
2724 return ATA_PROT_NODATA;
2727 case 10: /* UDMA Data-in */
2728 case 11: /* UDMA Data-Out */
2729 return ATA_PROT_DMA;
2731 case 4: /* PIO Data-in */
2732 case 5: /* PIO Data-out */
2733 return ATA_PROT_PIO;
2735 case 0: /* Hard Reset */
2737 case 8: /* Device Diagnostic */
2738 case 9: /* Device Reset */
2739 case 7: /* DMA Queued */
2740 case 12: /* FPDMA */
2741 case 15: /* Return Response Info */
2742 default: /* Reserved */
2746 return ATA_PROT_UNKNOWN;
2750 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2751 * @qc: command structure to be initialized
2753 * Handles either 12 or 16-byte versions of the CDB.
2756 * Zero on success, non-zero on failure.
2758 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2760 struct ata_taskfile *tf = &(qc->tf);
2761 struct scsi_cmnd *scmd = qc->scsicmd;
2762 struct ata_device *dev = qc->dev;
2763 const u8 *cdb = scmd->cmnd;
2765 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2769 * Filter TPM commands by default. These provide an
2770 * essentially uncontrolled encrypted "back door" between
2771 * applications and the disk. Set libata.allow_tpm=1 if you
2772 * have a real reason for wanting to use them. This ensures
2773 * that installed software cannot easily mess stuff up without
2774 * user intent. DVR type users will probably ship with this enabled
2775 * for movie content management.
2777 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
2778 * for this and should do in future but that it is not sufficient as
2779 * DCS is an optional feature set. Thus we also do the software filter
2780 * so that we comply with the TC consortium stated goal that the user
2781 * can turn off TC features of their system.
2783 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
2786 /* We may not issue DMA commands if no DMA mode is set */
2787 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2791 * 12 and 16 byte CDBs use different offsets to
2792 * provide the various register values.
2794 if (cdb[0] == ATA_16) {
2796 * 16-byte CDB - may contain extended commands.
2798 * If that is the case, copy the upper byte register values.
2800 if (cdb[1] & 0x01) {
2801 tf->hob_feature = cdb[3];
2802 tf->hob_nsect = cdb[5];
2803 tf->hob_lbal = cdb[7];
2804 tf->hob_lbam = cdb[9];
2805 tf->hob_lbah = cdb[11];
2806 tf->flags |= ATA_TFLAG_LBA48;
2808 tf->flags &= ~ATA_TFLAG_LBA48;
2811 * Always copy low byte, device and command registers.
2813 tf->feature = cdb[4];
2818 tf->device = cdb[13];
2819 tf->command = cdb[14];
2822 * 12-byte CDB - incapable of extended commands.
2824 tf->flags &= ~ATA_TFLAG_LBA48;
2826 tf->feature = cdb[3];
2831 tf->device = cdb[8];
2832 tf->command = cdb[9];
2835 /* enforce correct master/slave bit */
2836 tf->device = dev->devno ?
2837 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2839 /* sanity check for pio multi commands */
2840 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2843 if (is_multi_taskfile(tf)) {
2844 unsigned int multi_count = 1 << (cdb[1] >> 5);
2846 /* compare the passed through multi_count
2847 * with the cached multi_count of libata
2849 if (multi_count != dev->multi_count)
2850 ata_dev_printk(dev, KERN_WARNING,
2851 "invalid multi_count %u ignored\n",
2855 /* READ/WRITE LONG use a non-standard sect_size */
2856 qc->sect_size = ATA_SECT_SIZE;
2857 switch (tf->command) {
2858 case ATA_CMD_READ_LONG:
2859 case ATA_CMD_READ_LONG_ONCE:
2860 case ATA_CMD_WRITE_LONG:
2861 case ATA_CMD_WRITE_LONG_ONCE:
2862 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2864 qc->sect_size = scsi_bufflen(scmd);
2868 * Filter SET_FEATURES - XFER MODE command -- otherwise,
2869 * SET_FEATURES - XFER MODE must be preceded/succeeded
2870 * by an update to hardware-specific registers for each
2871 * controller (i.e. the reason for ->set_piomode(),
2872 * ->set_dmamode(), and ->post_set_mode() hooks).
2874 if ((tf->command == ATA_CMD_SET_FEATURES)
2875 && (tf->feature == SETFEATURES_XFER))
2879 * Set flags so that all registers will be written,
2880 * and pass on write indication (used for PIO/DMA
2883 tf->flags |= (ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE);
2885 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2886 tf->flags |= ATA_TFLAG_WRITE;
2889 * Set transfer length.
2891 * TODO: find out if we need to do more here to
2892 * cover scatter/gather case.
2894 ata_qc_set_pc_nbytes(qc);
2896 /* request result TF and be quiet about device error */
2897 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2902 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
2903 /* "Invalid field in cdb" */
2908 * ata_get_xlat_func - check if SCSI to ATA translation is possible
2910 * @cmd: SCSI command opcode to consider
2912 * Look up the SCSI command given, and determine whether the
2913 * SCSI command is to be translated or simulated.
2916 * Pointer to translation function if possible, %NULL if not.
2919 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
2929 return ata_scsi_rw_xlat;
2931 case SYNCHRONIZE_CACHE:
2932 if (ata_try_flush_cache(dev))
2933 return ata_scsi_flush_xlat;
2938 return ata_scsi_verify_xlat;
2942 return ata_scsi_pass_thru;
2945 return ata_scsi_start_stop_xlat;
2952 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
2953 * @ap: ATA port to which the command was being sent
2954 * @cmd: SCSI command to dump
2956 * Prints the contents of a SCSI command via printk().
2959 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
2960 struct scsi_cmnd *cmd)
2963 struct scsi_device *scsidev = cmd->device;
2964 u8 *scsicmd = cmd->cmnd;
2966 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
2968 scsidev->channel, scsidev->id, scsidev->lun,
2969 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
2970 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
2975 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
2976 void (*done)(struct scsi_cmnd *),
2977 struct ata_device *dev)
2979 u8 scsi_op = scmd->cmnd[0];
2980 ata_xlat_func_t xlat_func;
2983 if (dev->class == ATA_DEV_ATA) {
2984 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
2987 xlat_func = ata_get_xlat_func(dev, scsi_op);
2989 if (unlikely(!scmd->cmd_len))
2993 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
2994 /* relay SCSI command to ATAPI device */
2995 int len = COMMAND_SIZE(scsi_op);
2996 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
2999 xlat_func = atapi_xlat;
3001 /* ATA_16 passthru, treat as an ATA command */
3002 if (unlikely(scmd->cmd_len > 16))
3005 xlat_func = ata_get_xlat_func(dev, scsi_op);
3010 rc = ata_scsi_translate(dev, scmd, done, xlat_func);
3012 ata_scsi_simulate(dev, scmd, done);
3017 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3018 scmd->cmd_len, scsi_op, dev->cdb_len);
3019 scmd->result = DID_ERROR << 16;
3025 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3026 * @cmd: SCSI command to be sent
3027 * @done: Completion function, called when command is complete
3029 * In some cases, this function translates SCSI commands into
3030 * ATA taskfiles, and queues the taskfiles to be sent to
3031 * hardware. In other cases, this function simulates a
3032 * SCSI device by evaluating and responding to certain
3033 * SCSI commands. This creates the overall effect of
3034 * ATA and ATAPI devices appearing as SCSI devices.
3037 * Releases scsi-layer-held lock, and obtains host lock.
3040 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3043 int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
3045 struct ata_port *ap;
3046 struct ata_device *dev;
3047 struct scsi_device *scsidev = cmd->device;
3048 struct Scsi_Host *shost = scsidev->host;
3051 ap = ata_shost_to_port(shost);
3053 spin_unlock(shost->host_lock);
3054 spin_lock(ap->lock);
3056 ata_scsi_dump_cdb(ap, cmd);
3058 dev = ata_scsi_find_dev(ap, scsidev);
3060 rc = __ata_scsi_queuecmd(cmd, done, dev);
3062 cmd->result = (DID_BAD_TARGET << 16);
3066 spin_unlock(ap->lock);
3067 spin_lock(shost->host_lock);
3072 * ata_scsi_simulate - simulate SCSI command on ATA device
3073 * @dev: the target device
3074 * @cmd: SCSI command being sent to device.
3075 * @done: SCSI command completion function.
3077 * Interprets and directly executes a select list of SCSI commands
3078 * that can be handled internally.
3081 * spin_lock_irqsave(host lock)
3084 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
3085 void (*done)(struct scsi_cmnd *))
3087 struct ata_scsi_args args;
3088 const u8 *scsicmd = cmd->cmnd;
3096 switch(scsicmd[0]) {
3097 /* TODO: worth improving? */
3099 ata_scsi_invalid_field(cmd, done);
3103 if (scsicmd[1] & 2) /* is CmdDt set? */
3104 ata_scsi_invalid_field(cmd, done);
3105 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3106 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3107 else switch (scsicmd[2]) {
3109 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
3112 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
3115 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
3118 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3121 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3124 ata_scsi_invalid_field(cmd, done);
3131 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3134 case MODE_SELECT: /* unconditionally return */
3135 case MODE_SELECT_10: /* bad-field-in-cdb */
3136 ata_scsi_invalid_field(cmd, done);
3140 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3143 case SERVICE_ACTION_IN:
3144 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3145 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3147 ata_scsi_invalid_field(cmd, done);
3151 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3155 ata_scsi_set_sense(cmd, 0, 0, 0);
3156 cmd->result = (DRIVER_SENSE << 24);
3160 /* if we reach this, then writeback caching is disabled,
3161 * turning this into a no-op.
3163 case SYNCHRONIZE_CACHE:
3166 /* no-op's, complete with success */
3170 case TEST_UNIT_READY:
3171 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3174 case SEND_DIAGNOSTIC:
3175 tmp8 = scsicmd[1] & ~(1 << 3);
3176 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3177 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3179 ata_scsi_invalid_field(cmd, done);
3182 /* all other commands */
3184 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3185 /* "Invalid command operation code" */
3191 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3195 for (i = 0; i < host->n_ports; i++) {
3196 struct ata_port *ap = host->ports[i];
3197 struct Scsi_Host *shost;
3200 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3204 *(struct ata_port **)&shost->hostdata[0] = ap;
3205 ap->scsi_host = shost;
3207 shost->transportt = &ata_scsi_transport_template;
3208 shost->unique_id = ap->print_id;
3211 shost->max_channel = 1;
3212 shost->max_cmd_len = 16;
3214 /* Schedule policy is determined by ->qc_defer()
3215 * callback and it needs to see every deferred qc.
3216 * Set host_blocked to 1 to prevent SCSI midlayer from
3217 * automatically deferring requests.
3219 shost->max_host_blocked = 1;
3221 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3229 scsi_host_put(host->ports[i]->scsi_host);
3232 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3234 scsi_remove_host(shost);
3235 scsi_host_put(shost);
3240 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3243 struct ata_device *last_failed_dev = NULL;
3244 struct ata_link *link;
3245 struct ata_device *dev;
3247 if (ap->flags & ATA_FLAG_DISABLED)
3251 ata_port_for_each_link(link, ap) {
3252 ata_link_for_each_dev(dev, link) {
3253 struct scsi_device *sdev;
3254 int channel = 0, id = 0;
3256 if (!ata_dev_enabled(dev) || dev->sdev)
3259 if (ata_is_host_link(link))
3262 channel = link->pmp;
3264 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3266 if (!IS_ERR(sdev)) {
3268 scsi_device_put(sdev);
3273 /* If we scanned while EH was in progress or allocation
3274 * failure occurred, scan would have failed silently. Check
3275 * whether all devices are attached.
3277 ata_port_for_each_link(link, ap) {
3278 ata_link_for_each_dev(dev, link) {
3279 if (ata_dev_enabled(dev) && !dev->sdev)
3287 /* we're missing some SCSI devices */
3289 /* If caller requested synchrnous scan && we've made
3290 * any progress, sleep briefly and repeat.
3292 if (dev != last_failed_dev) {
3294 last_failed_dev = dev;
3298 /* We might be failing to detect boot device, give it
3299 * a few more chances.
3306 ata_port_printk(ap, KERN_ERR, "WARNING: synchronous SCSI scan "
3307 "failed without making any progress,\n"
3308 " switching to async\n");
3311 queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
3312 round_jiffies_relative(HZ));
3316 * ata_scsi_offline_dev - offline attached SCSI device
3317 * @dev: ATA device to offline attached SCSI device for
3319 * This function is called from ata_eh_hotplug() and responsible
3320 * for taking the SCSI device attached to @dev offline. This
3321 * function is called with host lock which protects dev->sdev
3325 * spin_lock_irqsave(host lock)
3328 * 1 if attached SCSI device exists, 0 otherwise.
3330 int ata_scsi_offline_dev(struct ata_device *dev)
3333 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3340 * ata_scsi_remove_dev - remove attached SCSI device
3341 * @dev: ATA device to remove attached SCSI device for
3343 * This function is called from ata_eh_scsi_hotplug() and
3344 * responsible for removing the SCSI device attached to @dev.
3347 * Kernel thread context (may sleep).
3349 static void ata_scsi_remove_dev(struct ata_device *dev)
3351 struct ata_port *ap = dev->link->ap;
3352 struct scsi_device *sdev;
3353 unsigned long flags;
3355 /* Alas, we need to grab scan_mutex to ensure SCSI device
3356 * state doesn't change underneath us and thus
3357 * scsi_device_get() always succeeds. The mutex locking can
3358 * be removed if there is __scsi_device_get() interface which
3359 * increments reference counts regardless of device state.
3361 mutex_lock(&ap->scsi_host->scan_mutex);
3362 spin_lock_irqsave(ap->lock, flags);
3364 /* clearing dev->sdev is protected by host lock */
3369 /* If user initiated unplug races with us, sdev can go
3370 * away underneath us after the host lock and
3371 * scan_mutex are released. Hold onto it.
3373 if (scsi_device_get(sdev) == 0) {
3374 /* The following ensures the attached sdev is
3375 * offline on return from ata_scsi_offline_dev()
3376 * regardless it wins or loses the race
3377 * against this function.
3379 scsi_device_set_state(sdev, SDEV_OFFLINE);
3386 spin_unlock_irqrestore(ap->lock, flags);
3387 mutex_unlock(&ap->scsi_host->scan_mutex);
3390 ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
3391 sdev->sdev_gendev.bus_id);
3393 scsi_remove_device(sdev);
3394 scsi_device_put(sdev);
3398 static void ata_scsi_handle_link_detach(struct ata_link *link)
3400 struct ata_port *ap = link->ap;
3401 struct ata_device *dev;
3403 ata_link_for_each_dev(dev, link) {
3404 unsigned long flags;
3406 if (!(dev->flags & ATA_DFLAG_DETACHED))
3409 spin_lock_irqsave(ap->lock, flags);
3410 dev->flags &= ~ATA_DFLAG_DETACHED;
3411 spin_unlock_irqrestore(ap->lock, flags);
3413 ata_scsi_remove_dev(dev);
3418 * ata_scsi_media_change_notify - send media change event
3419 * @dev: Pointer to the disk device with media change event
3421 * Tell the block layer to send a media change notification
3425 * spin_lock_irqsave(host lock)
3427 void ata_scsi_media_change_notify(struct ata_device *dev)
3430 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3435 * ata_scsi_hotplug - SCSI part of hotplug
3436 * @work: Pointer to ATA port to perform SCSI hotplug on
3438 * Perform SCSI part of hotplug. It's executed from a separate
3439 * workqueue after EH completes. This is necessary because SCSI
3440 * hot plugging requires working EH and hot unplugging is
3441 * synchronized with hot plugging with a mutex.
3444 * Kernel thread context (may sleep).
3446 void ata_scsi_hotplug(struct work_struct *work)
3448 struct ata_port *ap =
3449 container_of(work, struct ata_port, hotplug_task.work);
3452 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3453 DPRINTK("ENTER/EXIT - unloading\n");
3459 /* Unplug detached devices. We cannot use link iterator here
3460 * because PMP links have to be scanned even if PMP is
3461 * currently not attached. Iterate manually.
3463 ata_scsi_handle_link_detach(&ap->link);
3465 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3466 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3468 /* scan for new ones */
3469 ata_scsi_scan_host(ap, 0);
3475 * ata_scsi_user_scan - indication for user-initiated bus scan
3476 * @shost: SCSI host to scan
3477 * @channel: Channel to scan
3481 * This function is called when user explicitly requests bus
3482 * scan. Set probe pending flag and invoke EH.
3485 * SCSI layer (we don't care)
3490 static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3491 unsigned int id, unsigned int lun)
3493 struct ata_port *ap = ata_shost_to_port(shost);
3494 unsigned long flags;
3497 if (!ap->ops->error_handler)
3500 if (lun != SCAN_WILD_CARD && lun)
3503 if (!sata_pmp_attached(ap)) {
3504 if (channel != SCAN_WILD_CARD && channel)
3508 if (id != SCAN_WILD_CARD && id)
3513 spin_lock_irqsave(ap->lock, flags);
3515 if (devno == SCAN_WILD_CARD) {
3516 struct ata_link *link;
3518 ata_port_for_each_link(link, ap) {
3519 struct ata_eh_info *ehi = &link->eh_info;
3520 ehi->probe_mask |= ATA_ALL_DEVICES;
3521 ehi->action |= ATA_EH_RESET;
3524 struct ata_device *dev = ata_find_dev(ap, devno);
3527 struct ata_eh_info *ehi = &dev->link->eh_info;
3528 ehi->probe_mask |= 1 << dev->devno;
3529 ehi->action |= ATA_EH_RESET;
3535 ata_port_schedule_eh(ap);
3536 spin_unlock_irqrestore(ap->lock, flags);
3537 ata_port_wait_eh(ap);
3539 spin_unlock_irqrestore(ap->lock, flags);
3545 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3546 * @work: Pointer to ATA port to perform scsi_rescan_device()
3548 * After ATA pass thru (SAT) commands are executed successfully,
3549 * libata need to propagate the changes to SCSI layer. This
3550 * function must be executed from ata_aux_wq such that sdev
3551 * attach/detach don't race with rescan.
3554 * Kernel thread context (may sleep).
3556 void ata_scsi_dev_rescan(struct work_struct *work)
3558 struct ata_port *ap =
3559 container_of(work, struct ata_port, scsi_rescan_task);
3560 struct ata_link *link;
3561 struct ata_device *dev;
3562 unsigned long flags;
3564 spin_lock_irqsave(ap->lock, flags);
3566 ata_port_for_each_link(link, ap) {
3567 ata_link_for_each_dev(dev, link) {
3568 struct scsi_device *sdev = dev->sdev;
3570 if (!ata_dev_enabled(dev) || !sdev)
3572 if (scsi_device_get(sdev))
3575 spin_unlock_irqrestore(ap->lock, flags);
3576 scsi_rescan_device(&(sdev->sdev_gendev));
3577 scsi_device_put(sdev);
3578 spin_lock_irqsave(ap->lock, flags);
3582 spin_unlock_irqrestore(ap->lock, flags);
3586 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3587 * @host: ATA host container for all SAS ports
3588 * @port_info: Information from low-level host driver
3589 * @shost: SCSI host that the scsi device is attached to
3592 * PCI/etc. bus probe sem.
3595 * ata_port pointer on success / NULL on failure.
3598 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3599 struct ata_port_info *port_info,
3600 struct Scsi_Host *shost)
3602 struct ata_port *ap;
3604 ap = ata_port_alloc(host);
3609 ap->lock = shost->host_lock;
3610 ap->pio_mask = port_info->pio_mask;
3611 ap->mwdma_mask = port_info->mwdma_mask;
3612 ap->udma_mask = port_info->udma_mask;
3613 ap->flags |= port_info->flags;
3614 ap->ops = port_info->port_ops;
3615 ap->cbl = ATA_CBL_SATA;
3619 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3622 * ata_sas_port_start - Set port up for dma.
3623 * @ap: Port to initialize
3625 * Called just after data structures for each port are
3628 * May be used as the port_start() entry in ata_port_operations.
3631 * Inherited from caller.
3633 int ata_sas_port_start(struct ata_port *ap)
3637 EXPORT_SYMBOL_GPL(ata_sas_port_start);
3640 * ata_port_stop - Undo ata_sas_port_start()
3641 * @ap: Port to shut down
3643 * May be used as the port_stop() entry in ata_port_operations.
3646 * Inherited from caller.
3649 void ata_sas_port_stop(struct ata_port *ap)
3652 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3655 * ata_sas_port_init - Initialize a SATA device
3656 * @ap: SATA port to initialize
3659 * PCI/etc. bus probe sem.
3662 * Zero on success, non-zero on error.
3665 int ata_sas_port_init(struct ata_port *ap)
3667 int rc = ap->ops->port_start(ap);
3670 ap->print_id = ata_print_id++;
3671 rc = ata_bus_probe(ap);
3676 EXPORT_SYMBOL_GPL(ata_sas_port_init);
3679 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3680 * @ap: SATA port to destroy
3684 void ata_sas_port_destroy(struct ata_port *ap)
3686 if (ap->ops->port_stop)
3687 ap->ops->port_stop(ap);
3690 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3693 * ata_sas_slave_configure - Default slave_config routine for libata devices
3694 * @sdev: SCSI device to configure
3695 * @ap: ATA port to which SCSI device is attached
3701 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3703 ata_scsi_sdev_config(sdev);
3704 ata_scsi_dev_config(sdev, ap->link.device);
3707 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3710 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3711 * @cmd: SCSI command to be sent
3712 * @done: Completion function, called when command is complete
3713 * @ap: ATA port to which the command is being sent
3716 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3720 int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
3721 struct ata_port *ap)
3725 ata_scsi_dump_cdb(ap, cmd);
3727 if (likely(ata_dev_enabled(ap->link.device)))
3728 rc = __ata_scsi_queuecmd(cmd, done, ap->link.device);
3730 cmd->result = (DID_BAD_TARGET << 16);
3735 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);