2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/slab.h>
37 #include <linux/kernel.h>
38 #include <linux/blkdev.h>
39 #include <linux/spinlock.h>
40 #include <linux/export.h>
41 #include <scsi/scsi.h>
42 #include <scsi/scsi_host.h>
43 #include <scsi/scsi_cmnd.h>
44 #include <scsi/scsi_eh.h>
45 #include <scsi/scsi_device.h>
46 #include <scsi/scsi_tcq.h>
47 #include <scsi/scsi_transport.h>
48 #include <linux/libata.h>
49 #include <linux/hdreg.h>
50 #include <linux/uaccess.h>
51 #include <linux/suspend.h>
52 #include <asm/unaligned.h>
55 #include "libata-transport.h"
57 #define ATA_SCSI_RBUF_SIZE 4096
59 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
60 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
62 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
64 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
65 const struct scsi_device *scsidev);
66 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
67 const struct scsi_device *scsidev);
69 #define RW_RECOVERY_MPAGE 0x1
70 #define RW_RECOVERY_MPAGE_LEN 12
71 #define CACHE_MPAGE 0x8
72 #define CACHE_MPAGE_LEN 20
73 #define CONTROL_MPAGE 0xa
74 #define CONTROL_MPAGE_LEN 12
75 #define ALL_MPAGES 0x3f
76 #define ALL_SUB_MPAGES 0xff
79 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
81 RW_RECOVERY_MPAGE_LEN - 2,
83 0, /* read retry count */
85 0, /* write retry count */
89 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
92 0, /* contains WCE, needs to be 0 for logic */
93 0, 0, 0, 0, 0, 0, 0, 0, 0,
94 0, /* contains DRA, needs to be 0 for logic */
98 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
100 CONTROL_MPAGE_LEN - 2,
101 2, /* DSENSE=0, GLTSD=1 */
102 0, /* [QAM+QERR may be 1, see 05-359r1] */
103 0, 0, 0, 0, 0xff, 0xff,
104 0, 30 /* extended self test time, see 05-359r1 */
107 static const char *ata_lpm_policy_names[] = {
108 [ATA_LPM_UNKNOWN] = "max_performance",
109 [ATA_LPM_MAX_POWER] = "max_performance",
110 [ATA_LPM_MED_POWER] = "medium_power",
111 [ATA_LPM_MIN_POWER] = "min_power",
114 static ssize_t ata_scsi_lpm_store(struct device *device,
115 struct device_attribute *attr,
116 const char *buf, size_t count)
118 struct Scsi_Host *shost = class_to_shost(device);
119 struct ata_port *ap = ata_shost_to_port(shost);
120 struct ata_link *link;
121 struct ata_device *dev;
122 enum ata_lpm_policy policy;
125 /* UNKNOWN is internal state, iterate from MAX_POWER */
126 for (policy = ATA_LPM_MAX_POWER;
127 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
128 const char *name = ata_lpm_policy_names[policy];
130 if (strncmp(name, buf, strlen(name)) == 0)
133 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
136 spin_lock_irqsave(ap->lock, flags);
138 ata_for_each_link(link, ap, EDGE) {
139 ata_for_each_dev(dev, &ap->link, ENABLED) {
140 if (dev->horkage & ATA_HORKAGE_NOLPM) {
147 ap->target_lpm_policy = policy;
148 ata_port_schedule_eh(ap);
150 spin_unlock_irqrestore(ap->lock, flags);
154 static ssize_t ata_scsi_lpm_show(struct device *dev,
155 struct device_attribute *attr, char *buf)
157 struct Scsi_Host *shost = class_to_shost(dev);
158 struct ata_port *ap = ata_shost_to_port(shost);
160 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
163 return snprintf(buf, PAGE_SIZE, "%s\n",
164 ata_lpm_policy_names[ap->target_lpm_policy]);
166 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
167 ata_scsi_lpm_show, ata_scsi_lpm_store);
168 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
170 static ssize_t ata_scsi_park_show(struct device *device,
171 struct device_attribute *attr, char *buf)
173 struct scsi_device *sdev = to_scsi_device(device);
175 struct ata_link *link;
176 struct ata_device *dev;
177 unsigned long flags, now;
178 unsigned int uninitialized_var(msecs);
181 ap = ata_shost_to_port(sdev->host);
183 spin_lock_irqsave(ap->lock, flags);
184 dev = ata_scsi_find_dev(ap, sdev);
189 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
196 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
197 link->eh_context.unloaded_mask & (1 << dev->devno) &&
198 time_after(dev->unpark_deadline, now))
199 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
204 spin_unlock_irq(ap->lock);
206 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
209 static ssize_t ata_scsi_park_store(struct device *device,
210 struct device_attribute *attr,
211 const char *buf, size_t len)
213 struct scsi_device *sdev = to_scsi_device(device);
215 struct ata_device *dev;
220 rc = strict_strtol(buf, 10, &input);
221 if (rc || input < -2)
223 if (input > ATA_TMOUT_MAX_PARK) {
225 input = ATA_TMOUT_MAX_PARK;
228 ap = ata_shost_to_port(sdev->host);
230 spin_lock_irqsave(ap->lock, flags);
231 dev = ata_scsi_find_dev(ap, sdev);
232 if (unlikely(!dev)) {
236 if (dev->class != ATA_DEV_ATA) {
242 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
247 dev->unpark_deadline = ata_deadline(jiffies, input);
248 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
249 ata_port_schedule_eh(ap);
250 complete(&ap->park_req_pending);
254 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
257 dev->flags |= ATA_DFLAG_NO_UNLOAD;
262 spin_unlock_irqrestore(ap->lock, flags);
264 return rc ? rc : len;
266 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
267 ata_scsi_park_show, ata_scsi_park_store);
268 EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
270 static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
272 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
274 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
278 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
279 const char *buf, size_t count)
281 struct Scsi_Host *shost = class_to_shost(dev);
282 struct ata_port *ap = ata_shost_to_port(shost);
283 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
284 return ap->ops->em_store(ap, buf, count);
289 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
292 struct Scsi_Host *shost = class_to_shost(dev);
293 struct ata_port *ap = ata_shost_to_port(shost);
295 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
296 return ap->ops->em_show(ap, buf);
299 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
300 ata_scsi_em_message_show, ata_scsi_em_message_store);
301 EXPORT_SYMBOL_GPL(dev_attr_em_message);
304 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
307 struct Scsi_Host *shost = class_to_shost(dev);
308 struct ata_port *ap = ata_shost_to_port(shost);
310 return snprintf(buf, 23, "%d\n", ap->em_message_type);
312 DEVICE_ATTR(em_message_type, S_IRUGO,
313 ata_scsi_em_message_type_show, NULL);
314 EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
317 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
320 struct scsi_device *sdev = to_scsi_device(dev);
321 struct ata_port *ap = ata_shost_to_port(sdev->host);
322 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
324 if (atadev && ap->ops->sw_activity_show &&
325 (ap->flags & ATA_FLAG_SW_ACTIVITY))
326 return ap->ops->sw_activity_show(atadev, buf);
331 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
332 const char *buf, size_t count)
334 struct scsi_device *sdev = to_scsi_device(dev);
335 struct ata_port *ap = ata_shost_to_port(sdev->host);
336 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
337 enum sw_activity val;
340 if (atadev && ap->ops->sw_activity_store &&
341 (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
342 val = simple_strtoul(buf, NULL, 0);
344 case OFF: case BLINK_ON: case BLINK_OFF:
345 rc = ap->ops->sw_activity_store(atadev, val);
354 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
355 ata_scsi_activity_store);
356 EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
358 struct device_attribute *ata_common_sdev_attrs[] = {
359 &dev_attr_unload_heads,
362 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
364 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd)
366 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
367 /* "Invalid field in cbd" */
372 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
373 * @sdev: SCSI device for which BIOS geometry is to be determined
374 * @bdev: block device associated with @sdev
375 * @capacity: capacity of SCSI device
376 * @geom: location to which geometry will be output
378 * Generic bios head/sector/cylinder calculator
379 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
380 * mapping. Some situations may arise where the disk is not
381 * bootable if this is not used.
384 * Defined by the SCSI layer. We don't really care.
389 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
390 sector_t capacity, int geom[])
394 sector_div(capacity, 255*63);
401 * ata_scsi_unlock_native_capacity - unlock native capacity
402 * @sdev: SCSI device to adjust device capacity for
404 * This function is called if a partition on @sdev extends beyond
405 * the end of the device. It requests EH to unlock HPA.
408 * Defined by the SCSI layer. Might sleep.
410 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
412 struct ata_port *ap = ata_shost_to_port(sdev->host);
413 struct ata_device *dev;
416 spin_lock_irqsave(ap->lock, flags);
418 dev = ata_scsi_find_dev(ap, sdev);
419 if (dev && dev->n_sectors < dev->n_native_sectors) {
420 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
421 dev->link->eh_info.action |= ATA_EH_RESET;
422 ata_port_schedule_eh(ap);
425 spin_unlock_irqrestore(ap->lock, flags);
426 ata_port_wait_eh(ap);
430 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
432 * @sdev: SCSI device to get identify data for
433 * @arg: User buffer area for identify data
436 * Defined by the SCSI layer. We don't really care.
439 * Zero on success, negative errno on error.
441 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
444 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
445 u16 __user *dst = arg;
451 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
454 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
455 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
458 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
459 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
462 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
463 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
470 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
471 * @scsidev: Device to which we are issuing command
472 * @arg: User provided data for issuing command
475 * Defined by the SCSI layer. We don't really care.
478 * Zero on success, negative errno on error.
480 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
483 u8 scsi_cmd[MAX_COMMAND_SIZE];
484 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
486 enum dma_data_direction data_dir;
492 if (copy_from_user(args, arg, sizeof(args)))
495 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
499 memset(scsi_cmd, 0, sizeof(scsi_cmd));
502 argsize = ATA_SECT_SIZE * args[3];
503 argbuf = kmalloc(argsize, GFP_KERNEL);
504 if (argbuf == NULL) {
509 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
510 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
511 block count in sector count field */
512 data_dir = DMA_FROM_DEVICE;
514 scsi_cmd[1] = (3 << 1); /* Non-data */
515 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
519 scsi_cmd[0] = ATA_16;
521 scsi_cmd[4] = args[2];
522 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
523 scsi_cmd[6] = args[3];
524 scsi_cmd[8] = args[1];
528 scsi_cmd[6] = args[1];
530 scsi_cmd[14] = args[0];
532 /* Good values for timeout and retries? Values below
533 from scsi_ioctl_send_command() for default case... */
534 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
535 sensebuf, (10*HZ), 5, 0, NULL);
537 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
538 u8 *desc = sensebuf + 8;
539 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
541 /* If we set cc then ATA pass-through will cause a
542 * check condition even if no error. Filter that. */
543 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
544 struct scsi_sense_hdr sshdr;
545 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
547 if (sshdr.sense_key == 0 &&
548 sshdr.asc == 0 && sshdr.ascq == 0)
549 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
552 /* Send userspace a few ATA registers (same as drivers/ide) */
553 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
554 desc[0] == 0x09) { /* code is "ATA Descriptor" */
555 args[0] = desc[13]; /* status */
556 args[1] = desc[3]; /* error */
557 args[2] = desc[5]; /* sector count (0:7) */
558 if (copy_to_user(arg, args, sizeof(args)))
570 && copy_to_user(arg + sizeof(args), argbuf, argsize))
579 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
580 * @scsidev: Device to which we are issuing command
581 * @arg: User provided data for issuing command
584 * Defined by the SCSI layer. We don't really care.
587 * Zero on success, negative errno on error.
589 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
592 u8 scsi_cmd[MAX_COMMAND_SIZE];
593 u8 args[7], *sensebuf = NULL;
599 if (copy_from_user(args, arg, sizeof(args)))
602 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
606 memset(scsi_cmd, 0, sizeof(scsi_cmd));
607 scsi_cmd[0] = ATA_16;
608 scsi_cmd[1] = (3 << 1); /* Non-data */
609 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
610 scsi_cmd[4] = args[1];
611 scsi_cmd[6] = args[2];
612 scsi_cmd[8] = args[3];
613 scsi_cmd[10] = args[4];
614 scsi_cmd[12] = args[5];
615 scsi_cmd[13] = args[6] & 0x4f;
616 scsi_cmd[14] = args[0];
618 /* Good values for timeout and retries? Values below
619 from scsi_ioctl_send_command() for default case... */
620 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
621 sensebuf, (10*HZ), 5, 0, NULL);
623 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
624 u8 *desc = sensebuf + 8;
625 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
627 /* If we set cc then ATA pass-through will cause a
628 * check condition even if no error. Filter that. */
629 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
630 struct scsi_sense_hdr sshdr;
631 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
633 if (sshdr.sense_key == 0 &&
634 sshdr.asc == 0 && sshdr.ascq == 0)
635 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
638 /* Send userspace ATA registers */
639 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
640 desc[0] == 0x09) {/* code is "ATA Descriptor" */
641 args[0] = desc[13]; /* status */
642 args[1] = desc[3]; /* error */
643 args[2] = desc[5]; /* sector count (0:7) */
644 args[3] = desc[7]; /* lbal */
645 args[4] = desc[9]; /* lbam */
646 args[5] = desc[11]; /* lbah */
647 args[6] = desc[12]; /* select */
648 if (copy_to_user(arg, args, sizeof(args)))
663 static int ata_ioc32(struct ata_port *ap)
665 if (ap->flags & ATA_FLAG_PIO_DMA)
667 if (ap->pflags & ATA_PFLAG_PIO32)
672 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
673 int cmd, void __user *arg)
681 spin_lock_irqsave(ap->lock, flags);
683 spin_unlock_irqrestore(ap->lock, flags);
684 return put_user(val, (unsigned long __user *)arg);
687 val = (unsigned long) arg;
689 spin_lock_irqsave(ap->lock, flags);
690 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
692 ap->pflags |= ATA_PFLAG_PIO32;
694 ap->pflags &= ~ATA_PFLAG_PIO32;
696 if (val != ata_ioc32(ap))
699 spin_unlock_irqrestore(ap->lock, flags);
702 case HDIO_GET_IDENTITY:
703 return ata_get_identity(ap, scsidev, arg);
706 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
708 return ata_cmd_ioctl(scsidev, arg);
710 case HDIO_DRIVE_TASK:
711 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
713 return ata_task_ioctl(scsidev, arg);
722 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
724 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
726 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
729 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
732 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
733 * @dev: ATA device to which the new command is attached
734 * @cmd: SCSI command that originated this ATA command
736 * Obtain a reference to an unused ata_queued_cmd structure,
737 * which is the basic libata structure representing a single
738 * ATA command sent to the hardware.
740 * If a command was available, fill in the SCSI-specific
741 * portions of the structure with information on the
745 * spin_lock_irqsave(host lock)
748 * Command allocated, or %NULL if none available.
750 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
751 struct scsi_cmnd *cmd)
753 struct ata_queued_cmd *qc;
755 qc = ata_qc_new_init(dev);
758 qc->scsidone = cmd->scsi_done;
760 qc->sg = scsi_sglist(cmd);
761 qc->n_elem = scsi_sg_count(cmd);
763 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
770 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
772 struct scsi_cmnd *scmd = qc->scsicmd;
774 qc->extrabytes = scmd->request->extra_len;
775 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
779 * ata_dump_status - user friendly display of error info
780 * @id: id of the port in question
781 * @tf: ptr to filled out taskfile
783 * Decode and dump the ATA error/status registers for the user so
784 * that they have some idea what really happened at the non
785 * make-believe layer.
788 * inherited from caller
790 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
792 u8 stat = tf->command, err = tf->feature;
794 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
795 if (stat & ATA_BUSY) {
796 printk("Busy }\n"); /* Data is not valid in this case */
798 if (stat & 0x40) printk("DriveReady ");
799 if (stat & 0x20) printk("DeviceFault ");
800 if (stat & 0x10) printk("SeekComplete ");
801 if (stat & 0x08) printk("DataRequest ");
802 if (stat & 0x04) printk("CorrectedError ");
803 if (stat & 0x02) printk("Index ");
804 if (stat & 0x01) printk("Error ");
808 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
809 if (err & 0x04) printk("DriveStatusError ");
811 if (err & 0x04) printk("BadCRC ");
812 else printk("Sector ");
814 if (err & 0x40) printk("UncorrectableError ");
815 if (err & 0x10) printk("SectorIdNotFound ");
816 if (err & 0x02) printk("TrackZeroNotFound ");
817 if (err & 0x01) printk("AddrMarkNotFound ");
824 * ata_to_sense_error - convert ATA error to SCSI error
825 * @id: ATA device number
826 * @drv_stat: value contained in ATA status register
827 * @drv_err: value contained in ATA error register
828 * @sk: the sense key we'll fill out
829 * @asc: the additional sense code we'll fill out
830 * @ascq: the additional sense code qualifier we'll fill out
831 * @verbose: be verbose
833 * Converts an ATA error into a SCSI error. Fill out pointers to
834 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
835 * format sense blocks.
838 * spin_lock_irqsave(host lock)
840 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
841 u8 *asc, u8 *ascq, int verbose)
845 /* Based on the 3ware driver translation table */
846 static const unsigned char sense_table[][4] = {
848 {0xd1, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
850 {0xd0, ABORTED_COMMAND, 0x00, 0x00}, // Device busy Aborted command
852 {0x61, HARDWARE_ERROR, 0x00, 0x00}, // Device fault Hardware error
853 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
854 {0x84, ABORTED_COMMAND, 0x47, 0x00}, // Data CRC error SCSI parity error
855 /* MC|ID|ABRT|TRK0|MARK */
856 {0x37, NOT_READY, 0x04, 0x00}, // Unit offline Not ready
858 {0x09, NOT_READY, 0x04, 0x00}, // Unrecovered disk error Not ready
859 /* Bad address mark */
860 {0x01, MEDIUM_ERROR, 0x13, 0x00}, // Address mark not found Address mark not found for data field
862 {0x02, HARDWARE_ERROR, 0x00, 0x00}, // Track 0 not found Hardware error
864 {0x04, ABORTED_COMMAND, 0x00, 0x00}, // Aborted command Aborted command
865 /* Media change request */
866 {0x08, NOT_READY, 0x04, 0x00}, // Media change request FIXME: faking offline
868 {0x10, ABORTED_COMMAND, 0x14, 0x00}, // ID not found Recorded entity not found
870 {0x08, NOT_READY, 0x04, 0x00}, // Media change FIXME: faking offline
872 {0x40, MEDIUM_ERROR, 0x11, 0x04}, // Uncorrectable ECC error Unrecovered read error
873 /* BBD - block marked bad */
874 {0x80, MEDIUM_ERROR, 0x11, 0x04}, // Block marked bad Medium error, unrecovered read error
875 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
877 static const unsigned char stat_table[][4] = {
878 /* Must be first because BUSY means no other bits valid */
879 {0x80, ABORTED_COMMAND, 0x47, 0x00}, // Busy, fake parity for now
880 {0x20, HARDWARE_ERROR, 0x00, 0x00}, // Device fault
881 {0x08, ABORTED_COMMAND, 0x47, 0x00}, // Timed out in xfer, fake parity for now
882 {0x04, RECOVERED_ERROR, 0x11, 0x00}, // Recovered ECC error Medium error, recovered
883 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
887 * Is this an error we can process/parse
889 if (drv_stat & ATA_BUSY) {
890 drv_err = 0; /* Ignore the err bits, they're invalid */
894 /* Look for drv_err */
895 for (i = 0; sense_table[i][0] != 0xFF; i++) {
896 /* Look for best matches first */
897 if ((sense_table[i][0] & drv_err) ==
899 *sk = sense_table[i][1];
900 *asc = sense_table[i][2];
901 *ascq = sense_table[i][3];
905 /* No immediate match */
907 printk(KERN_WARNING "ata%u: no sense translation for "
908 "error 0x%02x\n", id, drv_err);
911 /* Fall back to interpreting status bits */
912 for (i = 0; stat_table[i][0] != 0xFF; i++) {
913 if (stat_table[i][0] & drv_stat) {
914 *sk = stat_table[i][1];
915 *asc = stat_table[i][2];
916 *ascq = stat_table[i][3];
920 /* No error? Undecoded? */
922 printk(KERN_WARNING "ata%u: no sense translation for "
923 "status: 0x%02x\n", id, drv_stat);
925 /* We need a sensible error return here, which is tricky, and one
926 that won't cause people to do things like return a disk wrongly */
927 *sk = ABORTED_COMMAND;
933 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
934 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
935 id, drv_stat, drv_err, *sk, *asc, *ascq);
940 * ata_gen_passthru_sense - Generate check condition sense block.
941 * @qc: Command that completed.
943 * This function is specific to the ATA descriptor format sense
944 * block specified for the ATA pass through commands. Regardless
945 * of whether the command errored or not, return a sense
946 * block. Copy all controller registers into the sense
947 * block. Clear sense key, ASC & ASCQ if there is no error.
952 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
954 struct scsi_cmnd *cmd = qc->scsicmd;
955 struct ata_taskfile *tf = &qc->result_tf;
956 unsigned char *sb = cmd->sense_buffer;
957 unsigned char *desc = sb + 8;
958 int verbose = qc->ap->ops->error_handler == NULL;
960 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
962 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
965 * Use ata_to_sense_error() to map status register bits
966 * onto sense key, asc & ascq.
969 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
970 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
971 &sb[1], &sb[2], &sb[3], verbose);
976 * Sense data is current and format is descriptor.
982 /* set length of additional sense data */
987 * Copy registers into sense buffer.
990 desc[3] = tf->feature; /* == error reg */
995 desc[12] = tf->device;
996 desc[13] = tf->command; /* == status reg */
999 * Fill in Extend bit, and the high order bytes
1002 if (tf->flags & ATA_TFLAG_LBA48) {
1004 desc[4] = tf->hob_nsect;
1005 desc[6] = tf->hob_lbal;
1006 desc[8] = tf->hob_lbam;
1007 desc[10] = tf->hob_lbah;
1012 * ata_gen_ata_sense - generate a SCSI fixed sense block
1013 * @qc: Command that we are erroring out
1015 * Generate sense block for a failed ATA command @qc. Descriptor
1016 * format is used to accommodate LBA48 block address.
1021 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1023 struct ata_device *dev = qc->dev;
1024 struct scsi_cmnd *cmd = qc->scsicmd;
1025 struct ata_taskfile *tf = &qc->result_tf;
1026 unsigned char *sb = cmd->sense_buffer;
1027 unsigned char *desc = sb + 8;
1028 int verbose = qc->ap->ops->error_handler == NULL;
1031 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1033 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1035 /* sense data is current and format is descriptor */
1038 /* Use ata_to_sense_error() to map status register bits
1039 * onto sense key, asc & ascq.
1042 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1043 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1044 &sb[1], &sb[2], &sb[3], verbose);
1048 block = ata_tf_read_block(&qc->result_tf, dev);
1050 /* information sense data descriptor */
1055 desc[2] |= 0x80; /* valid */
1056 desc[6] = block >> 40;
1057 desc[7] = block >> 32;
1058 desc[8] = block >> 24;
1059 desc[9] = block >> 16;
1060 desc[10] = block >> 8;
1064 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1066 sdev->use_10_for_rw = 1;
1067 sdev->use_10_for_ms = 1;
1069 /* Schedule policy is determined by ->qc_defer() callback and
1070 * it needs to see every deferred qc. Set dev_blocked to 1 to
1071 * prevent SCSI midlayer from automatically deferring
1074 sdev->max_device_blocked = 1;
1078 * atapi_drain_needed - Check whether data transfer may overflow
1079 * @rq: request to be checked
1081 * ATAPI commands which transfer variable length data to host
1082 * might overflow due to application error or hardare bug. This
1083 * function checks whether overflow should be drained and ignored
1090 * 1 if ; otherwise, 0.
1092 static int atapi_drain_needed(struct request *rq)
1094 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
1097 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
1100 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1103 static int ata_scsi_dev_config(struct scsi_device *sdev,
1104 struct ata_device *dev)
1106 struct request_queue *q = sdev->request_queue;
1108 if (!ata_id_has_unload(dev->id))
1109 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1111 /* configure max sectors */
1112 blk_queue_max_hw_sectors(q, dev->max_sectors);
1114 if (dev->class == ATA_DEV_ATAPI) {
1117 sdev->sector_size = ATA_SECT_SIZE;
1119 /* set DMA padding */
1120 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1122 /* configure draining */
1123 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1125 ata_dev_err(dev, "drain buffer allocation failed\n");
1129 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1131 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1132 sdev->manage_start_stop = 1;
1136 * ata_pio_sectors() expects buffer for each sector to not cross
1137 * page boundary. Enforce it by requiring buffers to be sector
1138 * aligned, which works iff sector_size is not larger than
1139 * PAGE_SIZE. ATAPI devices also need the alignment as
1140 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1142 if (sdev->sector_size > PAGE_SIZE)
1144 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1147 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1149 if (dev->flags & ATA_DFLAG_AN)
1150 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1152 if (dev->flags & ATA_DFLAG_NCQ) {
1155 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1156 depth = min(ATA_MAX_QUEUE - 1, depth);
1157 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
1160 blk_queue_flush_queueable(q, false);
1167 * ata_scsi_slave_config - Set SCSI device attributes
1168 * @sdev: SCSI device to examine
1170 * This is called before we actually start reading
1171 * and writing to the device, to configure certain
1172 * SCSI mid-layer behaviors.
1175 * Defined by SCSI layer. We don't really care.
1178 int ata_scsi_slave_config(struct scsi_device *sdev)
1180 struct ata_port *ap = ata_shost_to_port(sdev->host);
1181 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1184 ata_scsi_sdev_config(sdev);
1187 rc = ata_scsi_dev_config(sdev, dev);
1193 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1194 * @sdev: SCSI device to be destroyed
1196 * @sdev is about to be destroyed for hot/warm unplugging. If
1197 * this unplugging was initiated by libata as indicated by NULL
1198 * dev->sdev, this function doesn't have to do anything.
1199 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1200 * Clear dev->sdev, schedule the device for ATA detach and invoke
1204 * Defined by SCSI layer. We don't really care.
1206 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1208 struct ata_port *ap = ata_shost_to_port(sdev->host);
1209 struct request_queue *q = sdev->request_queue;
1210 unsigned long flags;
1211 struct ata_device *dev;
1213 if (!ap->ops->error_handler)
1216 spin_lock_irqsave(ap->lock, flags);
1217 dev = __ata_scsi_find_dev(ap, sdev);
1218 if (dev && dev->sdev) {
1219 /* SCSI device already in CANCEL state, no need to offline it */
1221 dev->flags |= ATA_DFLAG_DETACH;
1222 ata_port_schedule_eh(ap);
1224 spin_unlock_irqrestore(ap->lock, flags);
1226 kfree(q->dma_drain_buffer);
1227 q->dma_drain_buffer = NULL;
1228 q->dma_drain_size = 0;
1232 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1233 * @ap: ATA port to which the device change the queue depth
1234 * @sdev: SCSI device to configure queue depth for
1235 * @queue_depth: new queue depth
1236 * @reason: calling context
1238 * libsas and libata have different approaches for associating a sdev to
1242 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1243 int queue_depth, int reason)
1245 struct ata_device *dev;
1246 unsigned long flags;
1248 if (reason != SCSI_QDEPTH_DEFAULT)
1251 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1252 return sdev->queue_depth;
1254 dev = ata_scsi_find_dev(ap, sdev);
1255 if (!dev || !ata_dev_enabled(dev))
1256 return sdev->queue_depth;
1259 spin_lock_irqsave(ap->lock, flags);
1260 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1261 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1262 dev->flags |= ATA_DFLAG_NCQ_OFF;
1265 spin_unlock_irqrestore(ap->lock, flags);
1267 /* limit and apply queue depth */
1268 queue_depth = min(queue_depth, sdev->host->can_queue);
1269 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1270 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1272 if (sdev->queue_depth == queue_depth)
1275 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
1280 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1281 * @sdev: SCSI device to configure queue depth for
1282 * @queue_depth: new queue depth
1283 * @reason: calling context
1285 * This is libata standard hostt->change_queue_depth callback.
1286 * SCSI will call into this callback when user tries to set queue
1290 * SCSI layer (we don't care)
1293 * Newly configured queue depth.
1295 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth,
1298 struct ata_port *ap = ata_shost_to_port(sdev->host);
1300 return __ata_change_queue_depth(ap, sdev, queue_depth, reason);
1304 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1305 * @qc: Storage for translated ATA taskfile
1307 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1308 * (to start). Perhaps these commands should be preceded by
1309 * CHECK POWER MODE to see what power mode the device is already in.
1310 * [See SAT revision 5 at www.t10.org]
1313 * spin_lock_irqsave(host lock)
1316 * Zero on success, non-zero on error.
1318 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1320 struct scsi_cmnd *scmd = qc->scsicmd;
1321 struct ata_taskfile *tf = &qc->tf;
1322 const u8 *cdb = scmd->cmnd;
1324 if (scmd->cmd_len < 5)
1327 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1328 tf->protocol = ATA_PROT_NODATA;
1330 ; /* ignore IMMED bit, violates sat-r05 */
1333 goto invalid_fld; /* LOEJ bit set not supported */
1334 if (((cdb[4] >> 4) & 0xf) != 0)
1335 goto invalid_fld; /* power conditions not supported */
1338 tf->nsect = 1; /* 1 sector, lba=0 */
1340 if (qc->dev->flags & ATA_DFLAG_LBA) {
1341 tf->flags |= ATA_TFLAG_LBA;
1346 tf->device |= ATA_LBA;
1349 tf->lbal = 0x1; /* sect */
1350 tf->lbam = 0x0; /* cyl low */
1351 tf->lbah = 0x0; /* cyl high */
1354 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1356 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1357 * or S5) causing some drives to spin up and down again.
1359 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1360 system_state == SYSTEM_POWER_OFF)
1363 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1364 system_entering_hibernation())
1367 /* Issue ATA STANDBY IMMEDIATE command */
1368 tf->command = ATA_CMD_STANDBYNOW1;
1372 * Standby and Idle condition timers could be implemented but that
1373 * would require libata to implement the Power condition mode page
1374 * and allow the user to change it. Changing mode pages requires
1375 * MODE SELECT to be implemented.
1381 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1382 /* "Invalid field in cbd" */
1385 scmd->result = SAM_STAT_GOOD;
1391 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1392 * @qc: Storage for translated ATA taskfile
1394 * Sets up an ATA taskfile to issue FLUSH CACHE or
1398 * spin_lock_irqsave(host lock)
1401 * Zero on success, non-zero on error.
1403 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1405 struct ata_taskfile *tf = &qc->tf;
1407 tf->flags |= ATA_TFLAG_DEVICE;
1408 tf->protocol = ATA_PROT_NODATA;
1410 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1411 tf->command = ATA_CMD_FLUSH_EXT;
1413 tf->command = ATA_CMD_FLUSH;
1415 /* flush is critical for IO integrity, consider it an IO command */
1416 qc->flags |= ATA_QCFLAG_IO;
1422 * scsi_6_lba_len - Get LBA and transfer length
1423 * @cdb: SCSI command to translate
1425 * Calculate LBA and transfer length for 6-byte commands.
1429 * @plen: the transfer length
1431 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1436 VPRINTK("six-byte command\n");
1438 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1439 lba |= ((u64)cdb[2]) << 8;
1440 lba |= ((u64)cdb[3]);
1449 * scsi_10_lba_len - Get LBA and transfer length
1450 * @cdb: SCSI command to translate
1452 * Calculate LBA and transfer length for 10-byte commands.
1456 * @plen: the transfer length
1458 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1463 VPRINTK("ten-byte command\n");
1465 lba |= ((u64)cdb[2]) << 24;
1466 lba |= ((u64)cdb[3]) << 16;
1467 lba |= ((u64)cdb[4]) << 8;
1468 lba |= ((u64)cdb[5]);
1470 len |= ((u32)cdb[7]) << 8;
1471 len |= ((u32)cdb[8]);
1478 * scsi_16_lba_len - Get LBA and transfer length
1479 * @cdb: SCSI command to translate
1481 * Calculate LBA and transfer length for 16-byte commands.
1485 * @plen: the transfer length
1487 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1492 VPRINTK("sixteen-byte command\n");
1494 lba |= ((u64)cdb[2]) << 56;
1495 lba |= ((u64)cdb[3]) << 48;
1496 lba |= ((u64)cdb[4]) << 40;
1497 lba |= ((u64)cdb[5]) << 32;
1498 lba |= ((u64)cdb[6]) << 24;
1499 lba |= ((u64)cdb[7]) << 16;
1500 lba |= ((u64)cdb[8]) << 8;
1501 lba |= ((u64)cdb[9]);
1503 len |= ((u32)cdb[10]) << 24;
1504 len |= ((u32)cdb[11]) << 16;
1505 len |= ((u32)cdb[12]) << 8;
1506 len |= ((u32)cdb[13]);
1513 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1514 * @qc: Storage for translated ATA taskfile
1516 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1519 * spin_lock_irqsave(host lock)
1522 * Zero on success, non-zero on error.
1524 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1526 struct scsi_cmnd *scmd = qc->scsicmd;
1527 struct ata_taskfile *tf = &qc->tf;
1528 struct ata_device *dev = qc->dev;
1529 u64 dev_sectors = qc->dev->n_sectors;
1530 const u8 *cdb = scmd->cmnd;
1534 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1535 tf->protocol = ATA_PROT_NODATA;
1537 if (cdb[0] == VERIFY) {
1538 if (scmd->cmd_len < 10)
1540 scsi_10_lba_len(cdb, &block, &n_block);
1541 } else if (cdb[0] == VERIFY_16) {
1542 if (scmd->cmd_len < 16)
1544 scsi_16_lba_len(cdb, &block, &n_block);
1550 if (block >= dev_sectors)
1552 if ((block + n_block) > dev_sectors)
1555 if (dev->flags & ATA_DFLAG_LBA) {
1556 tf->flags |= ATA_TFLAG_LBA;
1558 if (lba_28_ok(block, n_block)) {
1560 tf->command = ATA_CMD_VERIFY;
1561 tf->device |= (block >> 24) & 0xf;
1562 } else if (lba_48_ok(block, n_block)) {
1563 if (!(dev->flags & ATA_DFLAG_LBA48))
1567 tf->flags |= ATA_TFLAG_LBA48;
1568 tf->command = ATA_CMD_VERIFY_EXT;
1570 tf->hob_nsect = (n_block >> 8) & 0xff;
1572 tf->hob_lbah = (block >> 40) & 0xff;
1573 tf->hob_lbam = (block >> 32) & 0xff;
1574 tf->hob_lbal = (block >> 24) & 0xff;
1576 /* request too large even for LBA48 */
1579 tf->nsect = n_block & 0xff;
1581 tf->lbah = (block >> 16) & 0xff;
1582 tf->lbam = (block >> 8) & 0xff;
1583 tf->lbal = block & 0xff;
1585 tf->device |= ATA_LBA;
1588 u32 sect, head, cyl, track;
1590 if (!lba_28_ok(block, n_block))
1593 /* Convert LBA to CHS */
1594 track = (u32)block / dev->sectors;
1595 cyl = track / dev->heads;
1596 head = track % dev->heads;
1597 sect = (u32)block % dev->sectors + 1;
1599 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1600 (u32)block, track, cyl, head, sect);
1602 /* Check whether the converted CHS can fit.
1606 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1609 tf->command = ATA_CMD_VERIFY;
1610 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1613 tf->lbah = cyl >> 8;
1620 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1621 /* "Invalid field in cbd" */
1625 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1626 /* "Logical Block Address out of range" */
1630 scmd->result = SAM_STAT_GOOD;
1635 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1636 * @qc: Storage for translated ATA taskfile
1638 * Converts any of six SCSI read/write commands into the
1639 * ATA counterpart, including starting sector (LBA),
1640 * sector count, and taking into account the device's LBA48
1643 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1644 * %WRITE_16 are currently supported.
1647 * spin_lock_irqsave(host lock)
1650 * Zero on success, non-zero on error.
1652 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1654 struct scsi_cmnd *scmd = qc->scsicmd;
1655 const u8 *cdb = scmd->cmnd;
1656 unsigned int tf_flags = 0;
1661 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1662 tf_flags |= ATA_TFLAG_WRITE;
1664 /* Calculate the SCSI LBA, transfer length and FUA. */
1668 if (unlikely(scmd->cmd_len < 10))
1670 scsi_10_lba_len(cdb, &block, &n_block);
1671 if (unlikely(cdb[1] & (1 << 3)))
1672 tf_flags |= ATA_TFLAG_FUA;
1676 if (unlikely(scmd->cmd_len < 6))
1678 scsi_6_lba_len(cdb, &block, &n_block);
1680 /* for 6-byte r/w commands, transfer length 0
1681 * means 256 blocks of data, not 0 block.
1688 if (unlikely(scmd->cmd_len < 16))
1690 scsi_16_lba_len(cdb, &block, &n_block);
1691 if (unlikely(cdb[1] & (1 << 3)))
1692 tf_flags |= ATA_TFLAG_FUA;
1695 DPRINTK("no-byte command\n");
1699 /* Check and compose ATA command */
1701 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1702 * length 0 means transfer 0 block of data.
1703 * However, for ATA R/W commands, sector count 0 means
1704 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1706 * WARNING: one or two older ATA drives treat 0 as 0...
1710 qc->flags |= ATA_QCFLAG_IO;
1711 qc->nbytes = n_block * scmd->device->sector_size;
1713 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1715 if (likely(rc == 0))
1720 /* treat all other errors as -EINVAL, fall through */
1722 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1723 /* "Invalid field in cbd" */
1727 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1728 /* "Logical Block Address out of range" */
1732 scmd->result = SAM_STAT_GOOD;
1736 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1738 struct ata_port *ap = qc->ap;
1739 struct scsi_cmnd *cmd = qc->scsicmd;
1740 u8 *cdb = cmd->cmnd;
1741 int need_sense = (qc->err_mask != 0);
1743 /* For ATA pass thru (SAT) commands, generate a sense block if
1744 * user mandated it or if there's an error. Note that if we
1745 * generate because the user forced us to, a check condition
1746 * is generated and the ATA register values are returned
1747 * whether the command completed successfully or not. If there
1748 * was no error, SK, ASC and ASCQ will all be zero.
1750 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1751 ((cdb[2] & 0x20) || need_sense)) {
1752 ata_gen_passthru_sense(qc);
1755 cmd->result = SAM_STAT_GOOD;
1757 /* TODO: decide which descriptor format to use
1758 * for 48b LBA devices and call that here
1759 * instead of the fixed desc, which is only
1760 * good for smaller LBA (and maybe CHS?)
1763 ata_gen_ata_sense(qc);
1767 if (need_sense && !ap->ops->error_handler)
1768 ata_dump_status(ap->print_id, &qc->result_tf);
1776 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1777 * @dev: ATA device to which the command is addressed
1778 * @cmd: SCSI command to execute
1779 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1781 * Our ->queuecommand() function has decided that the SCSI
1782 * command issued can be directly translated into an ATA
1783 * command, rather than handled internally.
1785 * This function sets up an ata_queued_cmd structure for the
1786 * SCSI command, and sends that ata_queued_cmd to the hardware.
1788 * The xlat_func argument (actor) returns 0 if ready to execute
1789 * ATA command, else 1 to finish translation. If 1 is returned
1790 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1791 * to be set reflecting an error condition or clean (early)
1795 * spin_lock_irqsave(host lock)
1798 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1799 * needs to be deferred.
1801 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1802 ata_xlat_func_t xlat_func)
1804 struct ata_port *ap = dev->link->ap;
1805 struct ata_queued_cmd *qc;
1810 qc = ata_scsi_qc_new(dev, cmd);
1814 /* data is present; dma-map it */
1815 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1816 cmd->sc_data_direction == DMA_TO_DEVICE) {
1817 if (unlikely(scsi_bufflen(cmd) < 1)) {
1818 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
1822 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1824 qc->dma_dir = cmd->sc_data_direction;
1827 qc->complete_fn = ata_scsi_qc_complete;
1832 if (ap->ops->qc_defer) {
1833 if ((rc = ap->ops->qc_defer(qc)))
1837 /* select device, send command to hardware */
1845 cmd->scsi_done(cmd);
1846 DPRINTK("EXIT - early finish (good or error)\n");
1851 cmd->result = (DID_ERROR << 16);
1852 cmd->scsi_done(cmd);
1854 DPRINTK("EXIT - internal\n");
1859 DPRINTK("EXIT - defer\n");
1860 if (rc == ATA_DEFER_LINK)
1861 return SCSI_MLQUEUE_DEVICE_BUSY;
1863 return SCSI_MLQUEUE_HOST_BUSY;
1867 * ata_scsi_rbuf_get - Map response buffer.
1868 * @cmd: SCSI command containing buffer to be mapped.
1869 * @flags: unsigned long variable to store irq enable status
1870 * @copy_in: copy in from user buffer
1872 * Prepare buffer for simulated SCSI commands.
1875 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1878 * Pointer to response buffer.
1880 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1881 unsigned long *flags)
1883 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1885 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1887 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1888 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1889 return ata_scsi_rbuf;
1893 * ata_scsi_rbuf_put - Unmap response buffer.
1894 * @cmd: SCSI command containing buffer to be unmapped.
1895 * @copy_out: copy out result
1896 * @flags: @flags passed to ata_scsi_rbuf_get()
1898 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1899 * @copy_back is true.
1902 * Unlocks ata_scsi_rbuf_lock.
1904 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1905 unsigned long *flags)
1908 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1909 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1910 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1914 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1915 * @args: device IDENTIFY data / SCSI command of interest.
1916 * @actor: Callback hook for desired SCSI command simulator
1918 * Takes care of the hard work of simulating a SCSI command...
1919 * Mapping the response buffer, calling the command's handler,
1920 * and handling the handler's return value. This return value
1921 * indicates whether the handler wishes the SCSI command to be
1922 * completed successfully (0), or not (in which case cmd->result
1923 * and sense buffer are assumed to be set).
1926 * spin_lock_irqsave(host lock)
1928 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1929 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1933 struct scsi_cmnd *cmd = args->cmd;
1934 unsigned long flags;
1936 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1937 rc = actor(args, rbuf);
1938 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
1941 cmd->result = SAM_STAT_GOOD;
1946 * ata_scsiop_inq_std - Simulate INQUIRY command
1947 * @args: device IDENTIFY data / SCSI command of interest.
1948 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1950 * Returns standard device identification data associated
1951 * with non-VPD INQUIRY command output.
1954 * spin_lock_irqsave(host lock)
1956 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1958 const u8 versions[] = {
1959 0x60, /* SAM-3 (no version claimed) */
1962 0x20, /* SBC-2 (no version claimed) */
1965 0x60 /* SPC-3 (no version claimed) */
1970 0x5, /* claim SPC-3 version compatibility */
1977 /* set scsi removeable (RMB) bit per ata bit */
1978 if (ata_id_removeable(args->id))
1981 memcpy(rbuf, hdr, sizeof(hdr));
1982 memcpy(&rbuf[8], "ATA ", 8);
1983 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
1984 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
1986 if (rbuf[32] == 0 || rbuf[32] == ' ')
1987 memcpy(&rbuf[32], "n/a ", 4);
1989 memcpy(rbuf + 59, versions, sizeof(versions));
1995 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
1996 * @args: device IDENTIFY data / SCSI command of interest.
1997 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1999 * Returns list of inquiry VPD pages available.
2002 * spin_lock_irqsave(host lock)
2004 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
2006 const u8 pages[] = {
2007 0x00, /* page 0x00, this page */
2008 0x80, /* page 0x80, unit serial no page */
2009 0x83, /* page 0x83, device ident page */
2010 0x89, /* page 0x89, ata info page */
2011 0xb0, /* page 0xb0, block limits page */
2012 0xb1, /* page 0xb1, block device characteristics page */
2013 0xb2, /* page 0xb2, thin provisioning page */
2016 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
2017 memcpy(rbuf + 4, pages, sizeof(pages));
2022 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2023 * @args: device IDENTIFY data / SCSI command of interest.
2024 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2026 * Returns ATA device serial number.
2029 * spin_lock_irqsave(host lock)
2031 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2035 0x80, /* this page code */
2037 ATA_ID_SERNO_LEN, /* page len */
2040 memcpy(rbuf, hdr, sizeof(hdr));
2041 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2042 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2047 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2048 * @args: device IDENTIFY data / SCSI command of interest.
2049 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2051 * Yields two logical unit device identification designators:
2052 * - vendor specific ASCII containing the ATA serial number
2053 * - SAT defined "t10 vendor id based" containing ASCII vendor
2054 * name ("ATA "), model and serial numbers.
2057 * spin_lock_irqsave(host lock)
2059 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2061 const int sat_model_serial_desc_len = 68;
2064 rbuf[1] = 0x83; /* this page code */
2067 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2069 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2071 ata_id_string(args->id, (unsigned char *) rbuf + num,
2072 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2073 num += ATA_ID_SERNO_LEN;
2075 /* SAT defined lu model and serial numbers descriptor */
2076 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2079 rbuf[num + 3] = sat_model_serial_desc_len;
2081 memcpy(rbuf + num, "ATA ", 8);
2083 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2085 num += ATA_ID_PROD_LEN;
2086 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2088 num += ATA_ID_SERNO_LEN;
2090 if (ata_id_has_wwn(args->id)) {
2091 /* SAT defined lu world wide name */
2092 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2095 rbuf[num + 3] = ATA_ID_WWN_LEN;
2097 ata_id_string(args->id, (unsigned char *) rbuf + num,
2098 ATA_ID_WWN, ATA_ID_WWN_LEN);
2099 num += ATA_ID_WWN_LEN;
2101 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2106 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2107 * @args: device IDENTIFY data / SCSI command of interest.
2108 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2110 * Yields SAT-specified ATA VPD page.
2113 * spin_lock_irqsave(host lock)
2115 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2117 struct ata_taskfile tf;
2119 memset(&tf, 0, sizeof(tf));
2121 rbuf[1] = 0x89; /* our page code */
2122 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2123 rbuf[3] = (0x238 & 0xff);
2125 memcpy(&rbuf[8], "linux ", 8);
2126 memcpy(&rbuf[16], "libata ", 16);
2127 memcpy(&rbuf[32], DRV_VERSION, 4);
2128 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2130 /* we don't store the ATA device signature, so we fake it */
2132 tf.command = ATA_DRDY; /* really, this is Status reg */
2136 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2137 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2139 rbuf[56] = ATA_CMD_ID_ATA;
2141 memcpy(&rbuf[60], &args->id[0], 512);
2145 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2150 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2153 * Optimal transfer length granularity.
2155 * This is always one physical block, but for disks with a smaller
2156 * logical than physical sector size we need to figure out what the
2159 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2160 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2163 * Optimal unmap granularity.
2165 * The ATA spec doesn't even know about a granularity or alignment
2166 * for the TRIM command. We can leave away most of the unmap related
2167 * VPD page entries, but we have specifify a granularity to signal
2168 * that we support some form of unmap - in thise case via WRITE SAME
2169 * with the unmap bit set.
2171 if (ata_id_has_trim(args->id)) {
2172 put_unaligned_be64(65535 * 512 / 8, &rbuf[36]);
2173 put_unaligned_be32(1, &rbuf[28]);
2179 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2181 int form_factor = ata_id_form_factor(args->id);
2182 int media_rotation_rate = ata_id_rotation_rate(args->id);
2186 rbuf[4] = media_rotation_rate >> 8;
2187 rbuf[5] = media_rotation_rate;
2188 rbuf[7] = form_factor;
2193 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2195 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2198 rbuf[5] = 1 << 6; /* TPWS */
2204 * ata_scsiop_noop - Command handler that simply returns success.
2205 * @args: device IDENTIFY data / SCSI command of interest.
2206 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2208 * No operation. Simply returns success to caller, to indicate
2209 * that the caller should successfully complete this SCSI command.
2212 * spin_lock_irqsave(host lock)
2214 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
2221 * ata_msense_caching - Simulate MODE SENSE caching info page
2222 * @id: device IDENTIFY data
2223 * @buf: output buffer
2225 * Generate a caching info page, which conditionally indicates
2226 * write caching to the SCSI layer, depending on device
2232 static unsigned int ata_msense_caching(u16 *id, u8 *buf)
2234 memcpy(buf, def_cache_mpage, sizeof(def_cache_mpage));
2235 if (ata_id_wcache_enabled(id))
2236 buf[2] |= (1 << 2); /* write cache enable */
2237 if (!ata_id_rahead_enabled(id))
2238 buf[12] |= (1 << 5); /* disable read ahead */
2239 return sizeof(def_cache_mpage);
2243 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2244 * @buf: output buffer
2246 * Generate a generic MODE SENSE control mode page.
2251 static unsigned int ata_msense_ctl_mode(u8 *buf)
2253 memcpy(buf, def_control_mpage, sizeof(def_control_mpage));
2254 return sizeof(def_control_mpage);
2258 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2259 * @buf: output buffer
2261 * Generate a generic MODE SENSE r/w error recovery page.
2266 static unsigned int ata_msense_rw_recovery(u8 *buf)
2268 memcpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage));
2269 return sizeof(def_rw_recovery_mpage);
2273 * We can turn this into a real blacklist if it's needed, for now just
2274 * blacklist any Maxtor BANC1G10 revision firmware
2276 static int ata_dev_supports_fua(u16 *id)
2278 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2282 if (!ata_id_has_fua(id))
2285 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2286 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2288 if (strcmp(model, "Maxtor"))
2290 if (strcmp(fw, "BANC1G10"))
2293 return 0; /* blacklisted */
2297 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2298 * @args: device IDENTIFY data / SCSI command of interest.
2299 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2301 * Simulate MODE SENSE commands. Assume this is invoked for direct
2302 * access devices (e.g. disks) only. There should be no block
2303 * descriptor for other device types.
2306 * spin_lock_irqsave(host lock)
2308 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2310 struct ata_device *dev = args->dev;
2311 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2312 const u8 sat_blk_desc[] = {
2313 0, 0, 0, 0, /* number of blocks: sat unspecified */
2315 0, 0x2, 0x0 /* block length: 512 bytes */
2318 unsigned int ebd, page_control, six_byte;
2323 six_byte = (scsicmd[0] == MODE_SENSE);
2324 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2326 * LLBA bit in msense(10) ignored (compliant)
2329 page_control = scsicmd[2] >> 6;
2330 switch (page_control) {
2331 case 0: /* current */
2332 break; /* supported */
2334 goto saving_not_supp;
2335 case 1: /* changeable */
2336 case 2: /* defaults */
2342 p += 4 + (ebd ? 8 : 0);
2344 p += 8 + (ebd ? 8 : 0);
2346 pg = scsicmd[2] & 0x3f;
2349 * No mode subpages supported (yet) but asking for _all_
2350 * subpages may be valid
2352 if (spg && (spg != ALL_SUB_MPAGES))
2356 case RW_RECOVERY_MPAGE:
2357 p += ata_msense_rw_recovery(p);
2361 p += ata_msense_caching(args->id, p);
2365 p += ata_msense_ctl_mode(p);
2369 p += ata_msense_rw_recovery(p);
2370 p += ata_msense_caching(args->id, p);
2371 p += ata_msense_ctl_mode(p);
2374 default: /* invalid page code */
2379 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2380 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2384 rbuf[0] = p - rbuf - 1;
2387 rbuf[3] = sizeof(sat_blk_desc);
2388 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2391 unsigned int output_len = p - rbuf - 2;
2393 rbuf[0] = output_len >> 8;
2394 rbuf[1] = output_len;
2397 rbuf[7] = sizeof(sat_blk_desc);
2398 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2404 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2405 /* "Invalid field in cbd" */
2409 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2410 /* "Saving parameters not supported" */
2415 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2416 * @args: device IDENTIFY data / SCSI command of interest.
2417 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2419 * Simulate READ CAPACITY commands.
2424 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2426 struct ata_device *dev = args->dev;
2427 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2428 u32 sector_size; /* physical sector size in bytes */
2432 sector_size = ata_id_logical_sector_size(dev->id);
2433 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2434 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2438 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2439 if (last_lba >= 0xffffffffULL)
2440 last_lba = 0xffffffff;
2442 /* sector count, 32-bit */
2443 rbuf[0] = last_lba >> (8 * 3);
2444 rbuf[1] = last_lba >> (8 * 2);
2445 rbuf[2] = last_lba >> (8 * 1);
2449 rbuf[4] = sector_size >> (8 * 3);
2450 rbuf[5] = sector_size >> (8 * 2);
2451 rbuf[6] = sector_size >> (8 * 1);
2452 rbuf[7] = sector_size;
2454 /* sector count, 64-bit */
2455 rbuf[0] = last_lba >> (8 * 7);
2456 rbuf[1] = last_lba >> (8 * 6);
2457 rbuf[2] = last_lba >> (8 * 5);
2458 rbuf[3] = last_lba >> (8 * 4);
2459 rbuf[4] = last_lba >> (8 * 3);
2460 rbuf[5] = last_lba >> (8 * 2);
2461 rbuf[6] = last_lba >> (8 * 1);
2465 rbuf[ 8] = sector_size >> (8 * 3);
2466 rbuf[ 9] = sector_size >> (8 * 2);
2467 rbuf[10] = sector_size >> (8 * 1);
2468 rbuf[11] = sector_size;
2471 rbuf[13] = log2_per_phys;
2472 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2473 rbuf[15] = lowest_aligned;
2475 if (ata_id_has_trim(args->id) &&
2476 !(dev->horkage & ATA_HORKAGE_NOTRIM)) {
2477 rbuf[14] |= 0x80; /* TPE */
2479 if (ata_id_has_zero_after_trim(args->id))
2480 rbuf[14] |= 0x40; /* TPRZ */
2488 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2489 * @args: device IDENTIFY data / SCSI command of interest.
2490 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2492 * Simulate REPORT LUNS command.
2495 * spin_lock_irqsave(host lock)
2497 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2500 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2505 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2507 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2508 /* FIXME: not quite right; we don't want the
2509 * translation of taskfile registers into
2510 * a sense descriptors, since that's only
2511 * correct for ATA, not ATAPI
2513 ata_gen_passthru_sense(qc);
2516 qc->scsidone(qc->scsicmd);
2520 /* is it pointless to prefer PIO for "safety reasons"? */
2521 static inline int ata_pio_use_silly(struct ata_port *ap)
2523 return (ap->flags & ATA_FLAG_PIO_DMA);
2526 static void atapi_request_sense(struct ata_queued_cmd *qc)
2528 struct ata_port *ap = qc->ap;
2529 struct scsi_cmnd *cmd = qc->scsicmd;
2531 DPRINTK("ATAPI request sense\n");
2533 /* FIXME: is this needed? */
2534 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2536 #ifdef CONFIG_ATA_SFF
2537 if (ap->ops->sff_tf_read)
2538 ap->ops->sff_tf_read(ap, &qc->tf);
2541 /* fill these in, for the case where they are -not- overwritten */
2542 cmd->sense_buffer[0] = 0x70;
2543 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2547 /* setup sg table and init transfer direction */
2548 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2549 ata_sg_init(qc, &qc->sgent, 1);
2550 qc->dma_dir = DMA_FROM_DEVICE;
2552 memset(&qc->cdb, 0, qc->dev->cdb_len);
2553 qc->cdb[0] = REQUEST_SENSE;
2554 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2556 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2557 qc->tf.command = ATA_CMD_PACKET;
2559 if (ata_pio_use_silly(ap)) {
2560 qc->tf.protocol = ATAPI_PROT_DMA;
2561 qc->tf.feature |= ATAPI_PKT_DMA;
2563 qc->tf.protocol = ATAPI_PROT_PIO;
2564 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2567 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2569 qc->complete_fn = atapi_sense_complete;
2576 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2578 struct scsi_cmnd *cmd = qc->scsicmd;
2579 unsigned int err_mask = qc->err_mask;
2581 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2583 /* handle completion from new EH */
2584 if (unlikely(qc->ap->ops->error_handler &&
2585 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2587 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2588 /* FIXME: not quite right; we don't want the
2589 * translation of taskfile registers into a
2590 * sense descriptors, since that's only
2591 * correct for ATA, not ATAPI
2593 ata_gen_passthru_sense(qc);
2596 /* SCSI EH automatically locks door if sdev->locked is
2597 * set. Sometimes door lock request continues to
2598 * fail, for example, when no media is present. This
2599 * creates a loop - SCSI EH issues door lock which
2600 * fails and gets invoked again to acquire sense data
2601 * for the failed command.
2603 * If door lock fails, always clear sdev->locked to
2604 * avoid this infinite loop.
2606 * This may happen before SCSI scan is complete. Make
2607 * sure qc->dev->sdev isn't NULL before dereferencing.
2609 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2610 qc->dev->sdev->locked = 0;
2612 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2618 /* successful completion or old EH failure path */
2619 if (unlikely(err_mask & AC_ERR_DEV)) {
2620 cmd->result = SAM_STAT_CHECK_CONDITION;
2621 atapi_request_sense(qc);
2623 } else if (unlikely(err_mask)) {
2624 /* FIXME: not quite right; we don't want the
2625 * translation of taskfile registers into
2626 * a sense descriptors, since that's only
2627 * correct for ATA, not ATAPI
2629 ata_gen_passthru_sense(qc);
2631 u8 *scsicmd = cmd->cmnd;
2633 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2634 unsigned long flags;
2637 buf = ata_scsi_rbuf_get(cmd, true, &flags);
2639 /* ATAPI devices typically report zero for their SCSI version,
2640 * and sometimes deviate from the spec WRT response data
2641 * format. If SCSI version is reported as zero like normal,
2642 * then we make the following fixups: 1) Fake MMC-5 version,
2643 * to indicate to the Linux scsi midlayer this is a modern
2644 * device. 2) Ensure response data format / ATAPI information
2645 * are always correct.
2652 ata_scsi_rbuf_put(cmd, true, &flags);
2655 cmd->result = SAM_STAT_GOOD;
2662 * atapi_xlat - Initialize PACKET taskfile
2663 * @qc: command structure to be initialized
2666 * spin_lock_irqsave(host lock)
2669 * Zero on success, non-zero on failure.
2671 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2673 struct scsi_cmnd *scmd = qc->scsicmd;
2674 struct ata_device *dev = qc->dev;
2675 int nodata = (scmd->sc_data_direction == DMA_NONE);
2676 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2677 unsigned int nbytes;
2679 memset(qc->cdb, 0, dev->cdb_len);
2680 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2682 qc->complete_fn = atapi_qc_complete;
2684 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2685 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2686 qc->tf.flags |= ATA_TFLAG_WRITE;
2687 DPRINTK("direction: write\n");
2690 qc->tf.command = ATA_CMD_PACKET;
2691 ata_qc_set_pc_nbytes(qc);
2693 /* check whether ATAPI DMA is safe */
2694 if (!nodata && !using_pio && atapi_check_dma(qc))
2697 /* Some controller variants snoop this value for Packet
2698 * transfers to do state machine and FIFO management. Thus we
2699 * want to set it properly, and for DMA where it is
2700 * effectively meaningless.
2702 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2704 /* Most ATAPI devices which honor transfer chunk size don't
2705 * behave according to the spec when odd chunk size which
2706 * matches the transfer length is specified. If the number of
2707 * bytes to transfer is 2n+1. According to the spec, what
2708 * should happen is to indicate that 2n+1 is going to be
2709 * transferred and transfer 2n+2 bytes where the last byte is
2712 * In practice, this doesn't happen. ATAPI devices first
2713 * indicate and transfer 2n bytes and then indicate and
2714 * transfer 2 bytes where the last byte is padding.
2716 * This inconsistency confuses several controllers which
2717 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2718 * These controllers use actual number of transferred bytes to
2719 * update DMA poitner and transfer of 4n+2 bytes make those
2720 * controller push DMA pointer by 4n+4 bytes because SATA data
2721 * FISes are aligned to 4 bytes. This causes data corruption
2722 * and buffer overrun.
2724 * Always setting nbytes to even number solves this problem
2725 * because then ATAPI devices don't have to split data at 2n
2731 qc->tf.lbam = (nbytes & 0xFF);
2732 qc->tf.lbah = (nbytes >> 8);
2735 qc->tf.protocol = ATAPI_PROT_NODATA;
2737 qc->tf.protocol = ATAPI_PROT_PIO;
2740 qc->tf.protocol = ATAPI_PROT_DMA;
2741 qc->tf.feature |= ATAPI_PKT_DMA;
2743 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2744 (scmd->sc_data_direction != DMA_TO_DEVICE))
2745 /* some SATA bridges need us to indicate data xfer direction */
2746 qc->tf.feature |= ATAPI_DMADIR;
2750 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2751 as ATAPI tape drives don't get this right otherwise */
2755 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2757 if (!sata_pmp_attached(ap)) {
2758 if (likely(devno < ata_link_max_devices(&ap->link)))
2759 return &ap->link.device[devno];
2761 if (likely(devno < ap->nr_pmp_links))
2762 return &ap->pmp_link[devno].device[0];
2768 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2769 const struct scsi_device *scsidev)
2773 /* skip commands not addressed to targets we simulate */
2774 if (!sata_pmp_attached(ap)) {
2775 if (unlikely(scsidev->channel || scsidev->lun))
2777 devno = scsidev->id;
2779 if (unlikely(scsidev->id || scsidev->lun))
2781 devno = scsidev->channel;
2784 return ata_find_dev(ap, devno);
2788 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2789 * @ap: ATA port to which the device is attached
2790 * @scsidev: SCSI device from which we derive the ATA device
2792 * Given various information provided in struct scsi_cmnd,
2793 * map that onto an ATA bus, and using that mapping
2794 * determine which ata_device is associated with the
2795 * SCSI command to be sent.
2798 * spin_lock_irqsave(host lock)
2801 * Associated ATA device, or %NULL if not found.
2803 static struct ata_device *
2804 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2806 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2808 if (unlikely(!dev || !ata_dev_enabled(dev)))
2815 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2816 * @byte1: Byte 1 from pass-thru CDB.
2819 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2822 ata_scsi_map_proto(u8 byte1)
2824 switch((byte1 & 0x1e) >> 1) {
2825 case 3: /* Non-data */
2826 return ATA_PROT_NODATA;
2829 case 10: /* UDMA Data-in */
2830 case 11: /* UDMA Data-Out */
2831 return ATA_PROT_DMA;
2833 case 4: /* PIO Data-in */
2834 case 5: /* PIO Data-out */
2835 return ATA_PROT_PIO;
2837 case 0: /* Hard Reset */
2839 case 8: /* Device Diagnostic */
2840 case 9: /* Device Reset */
2841 case 7: /* DMA Queued */
2842 case 12: /* FPDMA */
2843 case 15: /* Return Response Info */
2844 default: /* Reserved */
2848 return ATA_PROT_UNKNOWN;
2852 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2853 * @qc: command structure to be initialized
2855 * Handles either 12 or 16-byte versions of the CDB.
2858 * Zero on success, non-zero on failure.
2860 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2862 struct ata_taskfile *tf = &(qc->tf);
2863 struct scsi_cmnd *scmd = qc->scsicmd;
2864 struct ata_device *dev = qc->dev;
2865 const u8 *cdb = scmd->cmnd;
2867 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2871 * 12 and 16 byte CDBs use different offsets to
2872 * provide the various register values.
2874 if (cdb[0] == ATA_16) {
2876 * 16-byte CDB - may contain extended commands.
2878 * If that is the case, copy the upper byte register values.
2880 if (cdb[1] & 0x01) {
2881 tf->hob_feature = cdb[3];
2882 tf->hob_nsect = cdb[5];
2883 tf->hob_lbal = cdb[7];
2884 tf->hob_lbam = cdb[9];
2885 tf->hob_lbah = cdb[11];
2886 tf->flags |= ATA_TFLAG_LBA48;
2888 tf->flags &= ~ATA_TFLAG_LBA48;
2891 * Always copy low byte, device and command registers.
2893 tf->feature = cdb[4];
2898 tf->device = cdb[13];
2899 tf->command = cdb[14];
2902 * 12-byte CDB - incapable of extended commands.
2904 tf->flags &= ~ATA_TFLAG_LBA48;
2906 tf->feature = cdb[3];
2911 tf->device = cdb[8];
2912 tf->command = cdb[9];
2915 /* enforce correct master/slave bit */
2916 tf->device = dev->devno ?
2917 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
2919 switch (tf->command) {
2920 /* READ/WRITE LONG use a non-standard sect_size */
2921 case ATA_CMD_READ_LONG:
2922 case ATA_CMD_READ_LONG_ONCE:
2923 case ATA_CMD_WRITE_LONG:
2924 case ATA_CMD_WRITE_LONG_ONCE:
2925 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
2927 qc->sect_size = scsi_bufflen(scmd);
2930 /* commands using reported Logical Block size (e.g. 512 or 4K) */
2931 case ATA_CMD_CFA_WRITE_NE:
2932 case ATA_CMD_CFA_TRANS_SECT:
2933 case ATA_CMD_CFA_WRITE_MULT_NE:
2934 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
2936 case ATA_CMD_READ_EXT:
2937 case ATA_CMD_READ_QUEUED:
2938 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
2939 case ATA_CMD_FPDMA_READ:
2940 case ATA_CMD_READ_MULTI:
2941 case ATA_CMD_READ_MULTI_EXT:
2942 case ATA_CMD_PIO_READ:
2943 case ATA_CMD_PIO_READ_EXT:
2944 case ATA_CMD_READ_STREAM_DMA_EXT:
2945 case ATA_CMD_READ_STREAM_EXT:
2946 case ATA_CMD_VERIFY:
2947 case ATA_CMD_VERIFY_EXT:
2949 case ATA_CMD_WRITE_EXT:
2950 case ATA_CMD_WRITE_FUA_EXT:
2951 case ATA_CMD_WRITE_QUEUED:
2952 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
2953 case ATA_CMD_FPDMA_WRITE:
2954 case ATA_CMD_WRITE_MULTI:
2955 case ATA_CMD_WRITE_MULTI_EXT:
2956 case ATA_CMD_WRITE_MULTI_FUA_EXT:
2957 case ATA_CMD_PIO_WRITE:
2958 case ATA_CMD_PIO_WRITE_EXT:
2959 case ATA_CMD_WRITE_STREAM_DMA_EXT:
2960 case ATA_CMD_WRITE_STREAM_EXT:
2961 qc->sect_size = scmd->device->sector_size;
2964 /* Everything else uses 512 byte "sectors" */
2966 qc->sect_size = ATA_SECT_SIZE;
2970 * Set flags so that all registers will be written, pass on
2971 * write indication (used for PIO/DMA setup), result TF is
2972 * copied back and we don't whine too much about its failure.
2974 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2975 if (scmd->sc_data_direction == DMA_TO_DEVICE)
2976 tf->flags |= ATA_TFLAG_WRITE;
2978 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
2981 * Set transfer length.
2983 * TODO: find out if we need to do more here to
2984 * cover scatter/gather case.
2986 ata_qc_set_pc_nbytes(qc);
2988 /* We may not issue DMA commands if no DMA mode is set */
2989 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
2992 /* sanity check for pio multi commands */
2993 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
2996 if (is_multi_taskfile(tf)) {
2997 unsigned int multi_count = 1 << (cdb[1] >> 5);
2999 /* compare the passed through multi_count
3000 * with the cached multi_count of libata
3002 if (multi_count != dev->multi_count)
3003 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3008 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3009 * SET_FEATURES - XFER MODE must be preceded/succeeded
3010 * by an update to hardware-specific registers for each
3011 * controller (i.e. the reason for ->set_piomode(),
3012 * ->set_dmamode(), and ->post_set_mode() hooks).
3014 if (tf->command == ATA_CMD_SET_FEATURES &&
3015 tf->feature == SETFEATURES_XFER)
3019 * Filter TPM commands by default. These provide an
3020 * essentially uncontrolled encrypted "back door" between
3021 * applications and the disk. Set libata.allow_tpm=1 if you
3022 * have a real reason for wanting to use them. This ensures
3023 * that installed software cannot easily mess stuff up without
3024 * user intent. DVR type users will probably ship with this enabled
3025 * for movie content management.
3027 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3028 * for this and should do in future but that it is not sufficient as
3029 * DCS is an optional feature set. Thus we also do the software filter
3030 * so that we comply with the TC consortium stated goal that the user
3031 * can turn off TC features of their system.
3033 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
3039 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3040 /* "Invalid field in cdb" */
3044 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3046 struct ata_taskfile *tf = &qc->tf;
3047 struct scsi_cmnd *scmd = qc->scsicmd;
3048 struct ata_device *dev = qc->dev;
3049 const u8 *cdb = scmd->cmnd;
3055 /* we may not issue DMA commands if no DMA mode is set */
3056 if (unlikely(!dev->dma_mode))
3060 * We only allow sending this command through the block layer,
3061 * as it modifies the DATA OUT buffer, which would corrupt user
3062 * memory for SG_IO commands.
3064 if (unlikely(scmd->request->cmd_type != REQ_TYPE_FS))
3067 if (unlikely(scmd->cmd_len < 16))
3069 scsi_16_lba_len(cdb, &block, &n_block);
3071 /* for now we only support WRITE SAME with the unmap bit set */
3072 if (unlikely(!(cdb[1] & 0x8)))
3076 * WRITE SAME always has a sector sized buffer as payload, this
3077 * should never be a multiple entry S/G list.
3079 if (!scsi_sg_count(scmd))
3082 buf = page_address(sg_page(scsi_sglist(scmd)));
3083 size = ata_set_lba_range_entries(buf, 512, block, n_block);
3085 tf->protocol = ATA_PROT_DMA;
3086 tf->hob_feature = 0;
3087 tf->feature = ATA_DSM_TRIM;
3088 tf->hob_nsect = (size / 512) >> 8;
3089 tf->nsect = size / 512;
3090 tf->command = ATA_CMD_DSM;
3091 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3094 ata_qc_set_pc_nbytes(qc);
3099 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3100 /* "Invalid field in cdb" */
3105 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3107 * @cmd: SCSI command opcode to consider
3109 * Look up the SCSI command given, and determine whether the
3110 * SCSI command is to be translated or simulated.
3113 * Pointer to translation function if possible, %NULL if not.
3116 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3126 return ata_scsi_rw_xlat;
3129 return ata_scsi_write_same_xlat;
3131 case SYNCHRONIZE_CACHE:
3132 if (ata_try_flush_cache(dev))
3133 return ata_scsi_flush_xlat;
3138 return ata_scsi_verify_xlat;
3142 return ata_scsi_pass_thru;
3145 return ata_scsi_start_stop_xlat;
3152 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3153 * @ap: ATA port to which the command was being sent
3154 * @cmd: SCSI command to dump
3156 * Prints the contents of a SCSI command via printk().
3159 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3160 struct scsi_cmnd *cmd)
3163 struct scsi_device *scsidev = cmd->device;
3164 u8 *scsicmd = cmd->cmnd;
3166 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
3168 scsidev->channel, scsidev->id, scsidev->lun,
3169 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3170 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3175 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
3176 struct ata_device *dev)
3178 u8 scsi_op = scmd->cmnd[0];
3179 ata_xlat_func_t xlat_func;
3182 if (dev->class == ATA_DEV_ATA) {
3183 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3186 xlat_func = ata_get_xlat_func(dev, scsi_op);
3188 if (unlikely(!scmd->cmd_len))
3192 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3193 /* relay SCSI command to ATAPI device */
3194 int len = COMMAND_SIZE(scsi_op);
3195 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
3198 xlat_func = atapi_xlat;
3200 /* ATA_16 passthru, treat as an ATA command */
3201 if (unlikely(scmd->cmd_len > 16))
3204 xlat_func = ata_get_xlat_func(dev, scsi_op);
3209 rc = ata_scsi_translate(dev, scmd, xlat_func);
3211 ata_scsi_simulate(dev, scmd);
3216 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3217 scmd->cmd_len, scsi_op, dev->cdb_len);
3218 scmd->result = DID_ERROR << 16;
3219 scmd->scsi_done(scmd);
3224 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3225 * @shost: SCSI host of command to be sent
3226 * @cmd: SCSI command to be sent
3228 * In some cases, this function translates SCSI commands into
3229 * ATA taskfiles, and queues the taskfiles to be sent to
3230 * hardware. In other cases, this function simulates a
3231 * SCSI device by evaluating and responding to certain
3232 * SCSI commands. This creates the overall effect of
3233 * ATA and ATAPI devices appearing as SCSI devices.
3239 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3242 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
3244 struct ata_port *ap;
3245 struct ata_device *dev;
3246 struct scsi_device *scsidev = cmd->device;
3248 unsigned long irq_flags;
3250 ap = ata_shost_to_port(shost);
3252 spin_lock_irqsave(ap->lock, irq_flags);
3254 ata_scsi_dump_cdb(ap, cmd);
3256 dev = ata_scsi_find_dev(ap, scsidev);
3258 rc = __ata_scsi_queuecmd(cmd, dev);
3260 cmd->result = (DID_BAD_TARGET << 16);
3261 cmd->scsi_done(cmd);
3264 spin_unlock_irqrestore(ap->lock, irq_flags);
3270 * ata_scsi_simulate - simulate SCSI command on ATA device
3271 * @dev: the target device
3272 * @cmd: SCSI command being sent to device.
3274 * Interprets and directly executes a select list of SCSI commands
3275 * that can be handled internally.
3278 * spin_lock_irqsave(host lock)
3281 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
3283 struct ata_scsi_args args;
3284 const u8 *scsicmd = cmd->cmnd;
3290 args.done = cmd->scsi_done;
3292 switch(scsicmd[0]) {
3293 /* TODO: worth improving? */
3295 ata_scsi_invalid_field(cmd);
3299 if (scsicmd[1] & 2) /* is CmdDt set? */
3300 ata_scsi_invalid_field(cmd);
3301 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3302 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3303 else switch (scsicmd[2]) {
3305 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
3308 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
3311 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
3314 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3317 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3320 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3323 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
3326 ata_scsi_invalid_field(cmd);
3333 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3336 case MODE_SELECT: /* unconditionally return */
3337 case MODE_SELECT_10: /* bad-field-in-cdb */
3338 ata_scsi_invalid_field(cmd);
3342 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3345 case SERVICE_ACTION_IN:
3346 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3347 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3349 ata_scsi_invalid_field(cmd);
3353 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3357 ata_scsi_set_sense(cmd, 0, 0, 0);
3358 cmd->result = (DRIVER_SENSE << 24);
3359 cmd->scsi_done(cmd);
3362 /* if we reach this, then writeback caching is disabled,
3363 * turning this into a no-op.
3365 case SYNCHRONIZE_CACHE:
3368 /* no-op's, complete with success */
3372 case TEST_UNIT_READY:
3373 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3376 case SEND_DIAGNOSTIC:
3377 tmp8 = scsicmd[1] & ~(1 << 3);
3378 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3379 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3381 ata_scsi_invalid_field(cmd);
3384 /* all other commands */
3386 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3387 /* "Invalid command operation code" */
3388 cmd->scsi_done(cmd);
3393 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3397 for (i = 0; i < host->n_ports; i++) {
3398 struct ata_port *ap = host->ports[i];
3399 struct Scsi_Host *shost;
3402 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3406 *(struct ata_port **)&shost->hostdata[0] = ap;
3407 ap->scsi_host = shost;
3409 shost->transportt = ata_scsi_transport_template;
3410 shost->unique_id = ap->print_id;
3413 shost->max_channel = 1;
3414 shost->max_cmd_len = 16;
3416 /* Schedule policy is determined by ->qc_defer()
3417 * callback and it needs to see every deferred qc.
3418 * Set host_blocked to 1 to prevent SCSI midlayer from
3419 * automatically deferring requests.
3421 shost->max_host_blocked = 1;
3423 rc = scsi_add_host(ap->scsi_host, ap->host->dev);
3431 scsi_host_put(host->ports[i]->scsi_host);
3434 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3436 scsi_remove_host(shost);
3437 scsi_host_put(shost);
3442 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3445 struct ata_device *last_failed_dev = NULL;
3446 struct ata_link *link;
3447 struct ata_device *dev;
3450 ata_for_each_link(link, ap, EDGE) {
3451 ata_for_each_dev(dev, link, ENABLED) {
3452 struct scsi_device *sdev;
3453 int channel = 0, id = 0;
3458 if (ata_is_host_link(link))
3461 channel = link->pmp;
3463 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3465 if (!IS_ERR(sdev)) {
3467 scsi_device_put(sdev);
3474 /* If we scanned while EH was in progress or allocation
3475 * failure occurred, scan would have failed silently. Check
3476 * whether all devices are attached.
3478 ata_for_each_link(link, ap, EDGE) {
3479 ata_for_each_dev(dev, link, ENABLED) {
3488 /* we're missing some SCSI devices */
3490 /* If caller requested synchrnous scan && we've made
3491 * any progress, sleep briefly and repeat.
3493 if (dev != last_failed_dev) {
3495 last_failed_dev = dev;
3499 /* We might be failing to detect boot device, give it
3500 * a few more chances.
3508 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
3511 queue_delayed_work(system_long_wq, &ap->hotplug_task,
3512 round_jiffies_relative(HZ));
3516 * ata_scsi_offline_dev - offline attached SCSI device
3517 * @dev: ATA device to offline attached SCSI device for
3519 * This function is called from ata_eh_hotplug() and responsible
3520 * for taking the SCSI device attached to @dev offline. This
3521 * function is called with host lock which protects dev->sdev
3525 * spin_lock_irqsave(host lock)
3528 * 1 if attached SCSI device exists, 0 otherwise.
3530 int ata_scsi_offline_dev(struct ata_device *dev)
3533 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3540 * ata_scsi_remove_dev - remove attached SCSI device
3541 * @dev: ATA device to remove attached SCSI device for
3543 * This function is called from ata_eh_scsi_hotplug() and
3544 * responsible for removing the SCSI device attached to @dev.
3547 * Kernel thread context (may sleep).
3549 static void ata_scsi_remove_dev(struct ata_device *dev)
3551 struct ata_port *ap = dev->link->ap;
3552 struct scsi_device *sdev;
3553 unsigned long flags;
3555 /* Alas, we need to grab scan_mutex to ensure SCSI device
3556 * state doesn't change underneath us and thus
3557 * scsi_device_get() always succeeds. The mutex locking can
3558 * be removed if there is __scsi_device_get() interface which
3559 * increments reference counts regardless of device state.
3561 mutex_lock(&ap->scsi_host->scan_mutex);
3562 spin_lock_irqsave(ap->lock, flags);
3564 /* clearing dev->sdev is protected by host lock */
3569 /* If user initiated unplug races with us, sdev can go
3570 * away underneath us after the host lock and
3571 * scan_mutex are released. Hold onto it.
3573 if (scsi_device_get(sdev) == 0) {
3574 /* The following ensures the attached sdev is
3575 * offline on return from ata_scsi_offline_dev()
3576 * regardless it wins or loses the race
3577 * against this function.
3579 scsi_device_set_state(sdev, SDEV_OFFLINE);
3586 spin_unlock_irqrestore(ap->lock, flags);
3587 mutex_unlock(&ap->scsi_host->scan_mutex);
3590 ata_dev_info(dev, "detaching (SCSI %s)\n",
3591 dev_name(&sdev->sdev_gendev));
3593 scsi_remove_device(sdev);
3594 scsi_device_put(sdev);
3598 static void ata_scsi_handle_link_detach(struct ata_link *link)
3600 struct ata_port *ap = link->ap;
3601 struct ata_device *dev;
3603 ata_for_each_dev(dev, link, ALL) {
3604 unsigned long flags;
3606 if (!(dev->flags & ATA_DFLAG_DETACHED))
3609 spin_lock_irqsave(ap->lock, flags);
3610 dev->flags &= ~ATA_DFLAG_DETACHED;
3611 spin_unlock_irqrestore(ap->lock, flags);
3613 ata_scsi_remove_dev(dev);
3618 * ata_scsi_media_change_notify - send media change event
3619 * @dev: Pointer to the disk device with media change event
3621 * Tell the block layer to send a media change notification
3625 * spin_lock_irqsave(host lock)
3627 void ata_scsi_media_change_notify(struct ata_device *dev)
3630 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3635 * ata_scsi_hotplug - SCSI part of hotplug
3636 * @work: Pointer to ATA port to perform SCSI hotplug on
3638 * Perform SCSI part of hotplug. It's executed from a separate
3639 * workqueue after EH completes. This is necessary because SCSI
3640 * hot plugging requires working EH and hot unplugging is
3641 * synchronized with hot plugging with a mutex.
3644 * Kernel thread context (may sleep).
3646 void ata_scsi_hotplug(struct work_struct *work)
3648 struct ata_port *ap =
3649 container_of(work, struct ata_port, hotplug_task.work);
3652 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3653 DPRINTK("ENTER/EXIT - unloading\n");
3658 mutex_lock(&ap->scsi_scan_mutex);
3660 /* Unplug detached devices. We cannot use link iterator here
3661 * because PMP links have to be scanned even if PMP is
3662 * currently not attached. Iterate manually.
3664 ata_scsi_handle_link_detach(&ap->link);
3666 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3667 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3669 /* scan for new ones */
3670 ata_scsi_scan_host(ap, 0);
3672 mutex_unlock(&ap->scsi_scan_mutex);
3677 * ata_scsi_user_scan - indication for user-initiated bus scan
3678 * @shost: SCSI host to scan
3679 * @channel: Channel to scan
3683 * This function is called when user explicitly requests bus
3684 * scan. Set probe pending flag and invoke EH.
3687 * SCSI layer (we don't care)
3692 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3693 unsigned int id, unsigned int lun)
3695 struct ata_port *ap = ata_shost_to_port(shost);
3696 unsigned long flags;
3699 if (!ap->ops->error_handler)
3702 if (lun != SCAN_WILD_CARD && lun)
3705 if (!sata_pmp_attached(ap)) {
3706 if (channel != SCAN_WILD_CARD && channel)
3710 if (id != SCAN_WILD_CARD && id)
3715 spin_lock_irqsave(ap->lock, flags);
3717 if (devno == SCAN_WILD_CARD) {
3718 struct ata_link *link;
3720 ata_for_each_link(link, ap, EDGE) {
3721 struct ata_eh_info *ehi = &link->eh_info;
3722 ehi->probe_mask |= ATA_ALL_DEVICES;
3723 ehi->action |= ATA_EH_RESET;
3726 struct ata_device *dev = ata_find_dev(ap, devno);
3729 struct ata_eh_info *ehi = &dev->link->eh_info;
3730 ehi->probe_mask |= 1 << dev->devno;
3731 ehi->action |= ATA_EH_RESET;
3737 ata_port_schedule_eh(ap);
3738 spin_unlock_irqrestore(ap->lock, flags);
3739 ata_port_wait_eh(ap);
3741 spin_unlock_irqrestore(ap->lock, flags);
3747 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
3748 * @work: Pointer to ATA port to perform scsi_rescan_device()
3750 * After ATA pass thru (SAT) commands are executed successfully,
3751 * libata need to propagate the changes to SCSI layer.
3754 * Kernel thread context (may sleep).
3756 void ata_scsi_dev_rescan(struct work_struct *work)
3758 struct ata_port *ap =
3759 container_of(work, struct ata_port, scsi_rescan_task);
3760 struct ata_link *link;
3761 struct ata_device *dev;
3762 unsigned long flags;
3764 mutex_lock(&ap->scsi_scan_mutex);
3765 spin_lock_irqsave(ap->lock, flags);
3767 ata_for_each_link(link, ap, EDGE) {
3768 ata_for_each_dev(dev, link, ENABLED) {
3769 struct scsi_device *sdev = dev->sdev;
3773 if (scsi_device_get(sdev))
3776 spin_unlock_irqrestore(ap->lock, flags);
3777 scsi_rescan_device(&(sdev->sdev_gendev));
3778 scsi_device_put(sdev);
3779 spin_lock_irqsave(ap->lock, flags);
3783 spin_unlock_irqrestore(ap->lock, flags);
3784 mutex_unlock(&ap->scsi_scan_mutex);
3788 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
3789 * @host: ATA host container for all SAS ports
3790 * @port_info: Information from low-level host driver
3791 * @shost: SCSI host that the scsi device is attached to
3794 * PCI/etc. bus probe sem.
3797 * ata_port pointer on success / NULL on failure.
3800 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
3801 struct ata_port_info *port_info,
3802 struct Scsi_Host *shost)
3804 struct ata_port *ap;
3806 ap = ata_port_alloc(host);
3811 ap->lock = &host->lock;
3812 ap->pio_mask = port_info->pio_mask;
3813 ap->mwdma_mask = port_info->mwdma_mask;
3814 ap->udma_mask = port_info->udma_mask;
3815 ap->flags |= port_info->flags;
3816 ap->ops = port_info->port_ops;
3817 ap->cbl = ATA_CBL_SATA;
3821 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
3824 * ata_sas_port_start - Set port up for dma.
3825 * @ap: Port to initialize
3827 * Called just after data structures for each port are
3830 * May be used as the port_start() entry in ata_port_operations.
3833 * Inherited from caller.
3835 int ata_sas_port_start(struct ata_port *ap)
3838 * the port is marked as frozen at allocation time, but if we don't
3839 * have new eh, we won't thaw it
3841 if (!ap->ops->error_handler)
3842 ap->pflags &= ~ATA_PFLAG_FROZEN;
3845 EXPORT_SYMBOL_GPL(ata_sas_port_start);
3848 * ata_port_stop - Undo ata_sas_port_start()
3849 * @ap: Port to shut down
3851 * May be used as the port_stop() entry in ata_port_operations.
3854 * Inherited from caller.
3857 void ata_sas_port_stop(struct ata_port *ap)
3860 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
3863 * ata_sas_port_init - Initialize a SATA device
3864 * @ap: SATA port to initialize
3867 * PCI/etc. bus probe sem.
3870 * Zero on success, non-zero on error.
3873 int ata_sas_port_init(struct ata_port *ap)
3875 int rc = ap->ops->port_start(ap);
3878 ap->print_id = ata_print_id++;
3879 rc = ata_port_probe(ap);
3884 EXPORT_SYMBOL_GPL(ata_sas_port_init);
3887 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
3888 * @ap: SATA port to destroy
3892 void ata_sas_port_destroy(struct ata_port *ap)
3894 if (ap->ops->port_stop)
3895 ap->ops->port_stop(ap);
3898 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
3901 * ata_sas_slave_configure - Default slave_config routine for libata devices
3902 * @sdev: SCSI device to configure
3903 * @ap: ATA port to which SCSI device is attached
3909 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
3911 ata_scsi_sdev_config(sdev);
3912 ata_scsi_dev_config(sdev, ap->link.device);
3915 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
3918 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
3919 * @cmd: SCSI command to be sent
3920 * @ap: ATA port to which the command is being sent
3923 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3927 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
3931 ata_scsi_dump_cdb(ap, cmd);
3933 if (likely(ata_dev_enabled(ap->link.device)))
3934 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
3936 cmd->result = (DID_BAD_TARGET << 16);
3937 cmd->scsi_done(cmd);
3941 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);