2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Tejun Heo <tj@kernel.org>
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/driver-api/libata.rst
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>
53 #include <linux/ioprio.h>
56 #include "libata-transport.h"
58 #define ATA_SCSI_RBUF_SIZE 4096
60 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
61 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
63 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
65 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
66 const struct scsi_device *scsidev);
67 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
68 const struct scsi_device *scsidev);
70 #define RW_RECOVERY_MPAGE 0x1
71 #define RW_RECOVERY_MPAGE_LEN 12
72 #define CACHE_MPAGE 0x8
73 #define CACHE_MPAGE_LEN 20
74 #define CONTROL_MPAGE 0xa
75 #define CONTROL_MPAGE_LEN 12
76 #define ALL_MPAGES 0x3f
77 #define ALL_SUB_MPAGES 0xff
80 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
82 RW_RECOVERY_MPAGE_LEN - 2,
84 0, /* read retry count */
86 0, /* write retry count */
90 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
93 0, /* contains WCE, needs to be 0 for logic */
94 0, 0, 0, 0, 0, 0, 0, 0, 0,
95 0, /* contains DRA, needs to be 0 for logic */
99 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
101 CONTROL_MPAGE_LEN - 2,
102 2, /* DSENSE=0, GLTSD=1 */
103 0, /* [QAM+QERR may be 1, see 05-359r1] */
104 0, 0, 0, 0, 0xff, 0xff,
105 0, 30 /* extended self test time, see 05-359r1 */
108 static const char *ata_lpm_policy_names[] = {
109 [ATA_LPM_UNKNOWN] = "max_performance",
110 [ATA_LPM_MAX_POWER] = "max_performance",
111 [ATA_LPM_MED_POWER] = "medium_power",
112 [ATA_LPM_MED_POWER_WITH_DIPM] = "med_power_with_dipm",
113 [ATA_LPM_MIN_POWER_WITH_PARTIAL] = "min_power_with_partial",
114 [ATA_LPM_MIN_POWER] = "min_power",
117 static ssize_t ata_scsi_lpm_store(struct device *device,
118 struct device_attribute *attr,
119 const char *buf, size_t count)
121 struct Scsi_Host *shost = class_to_shost(device);
122 struct ata_port *ap = ata_shost_to_port(shost);
123 struct ata_link *link;
124 struct ata_device *dev;
125 enum ata_lpm_policy policy;
128 /* UNKNOWN is internal state, iterate from MAX_POWER */
129 for (policy = ATA_LPM_MAX_POWER;
130 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
131 const char *name = ata_lpm_policy_names[policy];
133 if (strncmp(name, buf, strlen(name)) == 0)
136 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
139 spin_lock_irqsave(ap->lock, flags);
141 ata_for_each_link(link, ap, EDGE) {
142 ata_for_each_dev(dev, &ap->link, ENABLED) {
143 if (dev->horkage & ATA_HORKAGE_NOLPM) {
150 ap->target_lpm_policy = policy;
151 ata_port_schedule_eh(ap);
153 spin_unlock_irqrestore(ap->lock, flags);
157 static ssize_t ata_scsi_lpm_show(struct device *dev,
158 struct device_attribute *attr, char *buf)
160 struct Scsi_Host *shost = class_to_shost(dev);
161 struct ata_port *ap = ata_shost_to_port(shost);
163 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
166 return snprintf(buf, PAGE_SIZE, "%s\n",
167 ata_lpm_policy_names[ap->target_lpm_policy]);
169 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
170 ata_scsi_lpm_show, ata_scsi_lpm_store);
171 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
173 static ssize_t ata_scsi_park_show(struct device *device,
174 struct device_attribute *attr, char *buf)
176 struct scsi_device *sdev = to_scsi_device(device);
178 struct ata_link *link;
179 struct ata_device *dev;
181 unsigned int uninitialized_var(msecs);
184 ap = ata_shost_to_port(sdev->host);
186 spin_lock_irq(ap->lock);
187 dev = ata_scsi_find_dev(ap, sdev);
192 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
199 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
200 link->eh_context.unloaded_mask & (1 << dev->devno) &&
201 time_after(dev->unpark_deadline, now))
202 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
207 spin_unlock_irq(ap->lock);
209 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
212 static ssize_t ata_scsi_park_store(struct device *device,
213 struct device_attribute *attr,
214 const char *buf, size_t len)
216 struct scsi_device *sdev = to_scsi_device(device);
218 struct ata_device *dev;
223 rc = kstrtol(buf, 10, &input);
228 if (input > ATA_TMOUT_MAX_PARK) {
230 input = ATA_TMOUT_MAX_PARK;
233 ap = ata_shost_to_port(sdev->host);
235 spin_lock_irqsave(ap->lock, flags);
236 dev = ata_scsi_find_dev(ap, sdev);
237 if (unlikely(!dev)) {
241 if (dev->class != ATA_DEV_ATA &&
242 dev->class != ATA_DEV_ZAC) {
248 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
253 dev->unpark_deadline = ata_deadline(jiffies, input);
254 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
255 ata_port_schedule_eh(ap);
256 complete(&ap->park_req_pending);
260 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
263 dev->flags |= ATA_DFLAG_NO_UNLOAD;
268 spin_unlock_irqrestore(ap->lock, flags);
270 return rc ? rc : len;
272 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
273 ata_scsi_park_show, ata_scsi_park_store);
274 EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
276 static ssize_t ata_ncq_prio_enable_show(struct device *device,
277 struct device_attribute *attr,
280 struct scsi_device *sdev = to_scsi_device(device);
282 struct ata_device *dev;
283 bool ncq_prio_enable;
286 ap = ata_shost_to_port(sdev->host);
288 spin_lock_irq(ap->lock);
289 dev = ata_scsi_find_dev(ap, sdev);
295 ncq_prio_enable = dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE;
298 spin_unlock_irq(ap->lock);
300 return rc ? rc : snprintf(buf, 20, "%u\n", ncq_prio_enable);
303 static ssize_t ata_ncq_prio_enable_store(struct device *device,
304 struct device_attribute *attr,
305 const char *buf, size_t len)
307 struct scsi_device *sdev = to_scsi_device(device);
309 struct ata_device *dev;
313 rc = kstrtol(buf, 10, &input);
316 if ((input < 0) || (input > 1))
319 ap = ata_shost_to_port(sdev->host);
320 dev = ata_scsi_find_dev(ap, sdev);
324 spin_lock_irq(ap->lock);
326 dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLE;
328 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
330 dev->link->eh_info.action |= ATA_EH_REVALIDATE;
331 dev->link->eh_info.flags |= ATA_EHI_QUIET;
332 ata_port_schedule_eh(ap);
333 spin_unlock_irq(ap->lock);
335 ata_port_wait_eh(ap);
338 spin_lock_irq(ap->lock);
339 if (!(dev->flags & ATA_DFLAG_NCQ_PRIO)) {
340 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
343 spin_unlock_irq(ap->lock);
346 return rc ? rc : len;
349 DEVICE_ATTR(ncq_prio_enable, S_IRUGO | S_IWUSR,
350 ata_ncq_prio_enable_show, ata_ncq_prio_enable_store);
351 EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_enable);
353 void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd,
354 u8 sk, u8 asc, u8 ascq)
356 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
361 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
363 scsi_build_sense_buffer(d_sense, cmd->sense_buffer, sk, asc, ascq);
366 void ata_scsi_set_sense_information(struct ata_device *dev,
367 struct scsi_cmnd *cmd,
368 const struct ata_taskfile *tf)
375 information = ata_tf_read_block(tf, dev);
376 if (information == U64_MAX)
379 scsi_set_sense_information(cmd->sense_buffer,
380 SCSI_SENSE_BUFFERSIZE, information);
383 static void ata_scsi_set_invalid_field(struct ata_device *dev,
384 struct scsi_cmnd *cmd, u16 field, u8 bit)
386 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0);
387 /* "Invalid field in CDB" */
388 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
392 static void ata_scsi_set_invalid_parameter(struct ata_device *dev,
393 struct scsi_cmnd *cmd, u16 field)
395 /* "Invalid field in parameter list" */
396 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0);
397 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
402 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
403 const char *buf, size_t count)
405 struct Scsi_Host *shost = class_to_shost(dev);
406 struct ata_port *ap = ata_shost_to_port(shost);
407 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
408 return ap->ops->em_store(ap, buf, count);
413 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
416 struct Scsi_Host *shost = class_to_shost(dev);
417 struct ata_port *ap = ata_shost_to_port(shost);
419 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
420 return ap->ops->em_show(ap, buf);
423 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
424 ata_scsi_em_message_show, ata_scsi_em_message_store);
425 EXPORT_SYMBOL_GPL(dev_attr_em_message);
428 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
431 struct Scsi_Host *shost = class_to_shost(dev);
432 struct ata_port *ap = ata_shost_to_port(shost);
434 return snprintf(buf, 23, "%d\n", ap->em_message_type);
436 DEVICE_ATTR(em_message_type, S_IRUGO,
437 ata_scsi_em_message_type_show, NULL);
438 EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
441 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
444 struct scsi_device *sdev = to_scsi_device(dev);
445 struct ata_port *ap = ata_shost_to_port(sdev->host);
446 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
448 if (atadev && ap->ops->sw_activity_show &&
449 (ap->flags & ATA_FLAG_SW_ACTIVITY))
450 return ap->ops->sw_activity_show(atadev, buf);
455 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
456 const char *buf, size_t count)
458 struct scsi_device *sdev = to_scsi_device(dev);
459 struct ata_port *ap = ata_shost_to_port(sdev->host);
460 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
461 enum sw_activity val;
464 if (atadev && ap->ops->sw_activity_store &&
465 (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
466 val = simple_strtoul(buf, NULL, 0);
468 case OFF: case BLINK_ON: case BLINK_OFF:
469 rc = ap->ops->sw_activity_store(atadev, val);
478 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
479 ata_scsi_activity_store);
480 EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
482 struct device_attribute *ata_common_sdev_attrs[] = {
483 &dev_attr_unload_heads,
484 &dev_attr_ncq_prio_enable,
487 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
490 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
491 * @sdev: SCSI device for which BIOS geometry is to be determined
492 * @bdev: block device associated with @sdev
493 * @capacity: capacity of SCSI device
494 * @geom: location to which geometry will be output
496 * Generic bios head/sector/cylinder calculator
497 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
498 * mapping. Some situations may arise where the disk is not
499 * bootable if this is not used.
502 * Defined by the SCSI layer. We don't really care.
507 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
508 sector_t capacity, int geom[])
512 sector_div(capacity, 255*63);
519 * ata_scsi_unlock_native_capacity - unlock native capacity
520 * @sdev: SCSI device to adjust device capacity for
522 * This function is called if a partition on @sdev extends beyond
523 * the end of the device. It requests EH to unlock HPA.
526 * Defined by the SCSI layer. Might sleep.
528 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
530 struct ata_port *ap = ata_shost_to_port(sdev->host);
531 struct ata_device *dev;
534 spin_lock_irqsave(ap->lock, flags);
536 dev = ata_scsi_find_dev(ap, sdev);
537 if (dev && dev->n_sectors < dev->n_native_sectors) {
538 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
539 dev->link->eh_info.action |= ATA_EH_RESET;
540 ata_port_schedule_eh(ap);
543 spin_unlock_irqrestore(ap->lock, flags);
544 ata_port_wait_eh(ap);
548 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
550 * @sdev: SCSI device to get identify data for
551 * @arg: User buffer area for identify data
554 * Defined by the SCSI layer. We don't really care.
557 * Zero on success, negative errno on error.
559 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
562 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
563 u16 __user *dst = arg;
569 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
572 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
573 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
576 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
577 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
580 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
581 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
588 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
589 * @scsidev: Device to which we are issuing command
590 * @arg: User provided data for issuing command
593 * Defined by the SCSI layer. We don't really care.
596 * Zero on success, negative errno on error.
598 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
601 u8 sensebuf[SCSI_SENSE_BUFFERSIZE];
602 u8 scsi_cmd[MAX_COMMAND_SIZE];
603 u8 args[4], *argbuf = NULL;
605 enum dma_data_direction data_dir;
606 struct scsi_sense_hdr sshdr;
612 if (copy_from_user(args, arg, sizeof(args)))
615 memset(sensebuf, 0, sizeof(sensebuf));
616 memset(scsi_cmd, 0, sizeof(scsi_cmd));
619 argsize = ATA_SECT_SIZE * args[3];
620 argbuf = kmalloc(argsize, GFP_KERNEL);
621 if (argbuf == NULL) {
626 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
627 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
628 block count in sector count field */
629 data_dir = DMA_FROM_DEVICE;
631 scsi_cmd[1] = (3 << 1); /* Non-data */
632 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
636 scsi_cmd[0] = ATA_16;
638 scsi_cmd[4] = args[2];
639 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
640 scsi_cmd[6] = args[3];
641 scsi_cmd[8] = args[1];
645 scsi_cmd[6] = args[1];
647 scsi_cmd[14] = args[0];
649 /* Good values for timeout and retries? Values below
650 from scsi_ioctl_send_command() for default case... */
651 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
652 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL);
654 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
655 u8 *desc = sensebuf + 8;
656 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
658 /* If we set cc then ATA pass-through will cause a
659 * check condition even if no error. Filter that. */
660 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
661 if (sshdr.sense_key == RECOVERED_ERROR &&
662 sshdr.asc == 0 && sshdr.ascq == 0x1d)
663 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
666 /* Send userspace a few ATA registers (same as drivers/ide) */
667 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
668 desc[0] == 0x09) { /* code is "ATA Descriptor" */
669 args[0] = desc[13]; /* status */
670 args[1] = desc[3]; /* error */
671 args[2] = desc[5]; /* sector count (0:7) */
672 if (copy_to_user(arg, args, sizeof(args)))
684 && copy_to_user(arg + sizeof(args), argbuf, argsize))
692 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
693 * @scsidev: Device to which we are issuing command
694 * @arg: User provided data for issuing command
697 * Defined by the SCSI layer. We don't really care.
700 * Zero on success, negative errno on error.
702 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
705 u8 sensebuf[SCSI_SENSE_BUFFERSIZE];
706 u8 scsi_cmd[MAX_COMMAND_SIZE];
708 struct scsi_sense_hdr sshdr;
714 if (copy_from_user(args, arg, sizeof(args)))
717 memset(sensebuf, 0, sizeof(sensebuf));
718 memset(scsi_cmd, 0, sizeof(scsi_cmd));
719 scsi_cmd[0] = ATA_16;
720 scsi_cmd[1] = (3 << 1); /* Non-data */
721 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
722 scsi_cmd[4] = args[1];
723 scsi_cmd[6] = args[2];
724 scsi_cmd[8] = args[3];
725 scsi_cmd[10] = args[4];
726 scsi_cmd[12] = args[5];
727 scsi_cmd[13] = args[6] & 0x4f;
728 scsi_cmd[14] = args[0];
730 /* Good values for timeout and retries? Values below
731 from scsi_ioctl_send_command() for default case... */
732 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
733 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL);
735 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
736 u8 *desc = sensebuf + 8;
737 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
739 /* If we set cc then ATA pass-through will cause a
740 * check condition even if no error. Filter that. */
741 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
742 if (sshdr.sense_key == RECOVERED_ERROR &&
743 sshdr.asc == 0 && sshdr.ascq == 0x1d)
744 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
747 /* Send userspace ATA registers */
748 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
749 desc[0] == 0x09) {/* code is "ATA Descriptor" */
750 args[0] = desc[13]; /* status */
751 args[1] = desc[3]; /* error */
752 args[2] = desc[5]; /* sector count (0:7) */
753 args[3] = desc[7]; /* lbal */
754 args[4] = desc[9]; /* lbam */
755 args[5] = desc[11]; /* lbah */
756 args[6] = desc[12]; /* select */
757 if (copy_to_user(arg, args, sizeof(args)))
771 static int ata_ioc32(struct ata_port *ap)
773 if (ap->flags & ATA_FLAG_PIO_DMA)
775 if (ap->pflags & ATA_PFLAG_PIO32)
780 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
781 int cmd, void __user *arg)
789 spin_lock_irqsave(ap->lock, flags);
791 spin_unlock_irqrestore(ap->lock, flags);
792 return put_user(val, (unsigned long __user *)arg);
795 val = (unsigned long) arg;
797 spin_lock_irqsave(ap->lock, flags);
798 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
800 ap->pflags |= ATA_PFLAG_PIO32;
802 ap->pflags &= ~ATA_PFLAG_PIO32;
804 if (val != ata_ioc32(ap))
807 spin_unlock_irqrestore(ap->lock, flags);
810 case HDIO_GET_IDENTITY:
811 return ata_get_identity(ap, scsidev, arg);
814 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
816 return ata_cmd_ioctl(scsidev, arg);
818 case HDIO_DRIVE_TASK:
819 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
821 return ata_task_ioctl(scsidev, arg);
830 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
832 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
834 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
837 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
840 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
841 * @dev: ATA device to which the new command is attached
842 * @cmd: SCSI command that originated this ATA command
844 * Obtain a reference to an unused ata_queued_cmd structure,
845 * which is the basic libata structure representing a single
846 * ATA command sent to the hardware.
848 * If a command was available, fill in the SCSI-specific
849 * portions of the structure with information on the
853 * spin_lock_irqsave(host lock)
856 * Command allocated, or %NULL if none available.
858 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
859 struct scsi_cmnd *cmd)
861 struct ata_queued_cmd *qc;
863 qc = ata_qc_new_init(dev, cmd->request->tag);
866 qc->scsidone = cmd->scsi_done;
868 qc->sg = scsi_sglist(cmd);
869 qc->n_elem = scsi_sg_count(cmd);
871 if (cmd->request->rq_flags & RQF_QUIET)
872 qc->flags |= ATA_QCFLAG_QUIET;
874 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
881 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
883 struct scsi_cmnd *scmd = qc->scsicmd;
885 qc->extrabytes = scmd->request->extra_len;
886 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
890 * ata_dump_status - user friendly display of error info
891 * @id: id of the port in question
892 * @tf: ptr to filled out taskfile
894 * Decode and dump the ATA error/status registers for the user so
895 * that they have some idea what really happened at the non
896 * make-believe layer.
899 * inherited from caller
901 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
903 u8 stat = tf->command, err = tf->feature;
905 pr_warn("ata%u: status=0x%02x { ", id, stat);
906 if (stat & ATA_BUSY) {
907 pr_cont("Busy }\n"); /* Data is not valid in this case */
909 if (stat & ATA_DRDY) pr_cont("DriveReady ");
910 if (stat & ATA_DF) pr_cont("DeviceFault ");
911 if (stat & ATA_DSC) pr_cont("SeekComplete ");
912 if (stat & ATA_DRQ) pr_cont("DataRequest ");
913 if (stat & ATA_CORR) pr_cont("CorrectedError ");
914 if (stat & ATA_SENSE) pr_cont("Sense ");
915 if (stat & ATA_ERR) pr_cont("Error ");
919 pr_warn("ata%u: error=0x%02x { ", id, err);
920 if (err & ATA_ABORTED) pr_cont("DriveStatusError ");
921 if (err & ATA_ICRC) {
922 if (err & ATA_ABORTED)
924 else pr_cont("Sector ");
926 if (err & ATA_UNC) pr_cont("UncorrectableError ");
927 if (err & ATA_IDNF) pr_cont("SectorIdNotFound ");
928 if (err & ATA_TRK0NF) pr_cont("TrackZeroNotFound ");
929 if (err & ATA_AMNF) pr_cont("AddrMarkNotFound ");
936 * ata_to_sense_error - convert ATA error to SCSI error
937 * @id: ATA device number
938 * @drv_stat: value contained in ATA status register
939 * @drv_err: value contained in ATA error register
940 * @sk: the sense key we'll fill out
941 * @asc: the additional sense code we'll fill out
942 * @ascq: the additional sense code qualifier we'll fill out
943 * @verbose: be verbose
945 * Converts an ATA error into a SCSI error. Fill out pointers to
946 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
947 * format sense blocks.
950 * spin_lock_irqsave(host lock)
952 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
953 u8 *asc, u8 *ascq, int verbose)
957 /* Based on the 3ware driver translation table */
958 static const unsigned char sense_table[][4] = {
960 {0xd1, ABORTED_COMMAND, 0x00, 0x00},
961 // Device busy Aborted command
963 {0xd0, ABORTED_COMMAND, 0x00, 0x00},
964 // Device busy Aborted command
966 {0x61, HARDWARE_ERROR, 0x00, 0x00},
967 // Device fault Hardware error
968 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
969 {0x84, ABORTED_COMMAND, 0x47, 0x00},
970 // Data CRC error SCSI parity error
971 /* MC|ID|ABRT|TRK0|MARK */
972 {0x37, NOT_READY, 0x04, 0x00},
973 // Unit offline Not ready
975 {0x09, NOT_READY, 0x04, 0x00},
976 // Unrecovered disk error Not ready
977 /* Bad address mark */
978 {0x01, MEDIUM_ERROR, 0x13, 0x00},
979 // Address mark not found for data field
980 /* TRK0 - Track 0 not found */
981 {0x02, HARDWARE_ERROR, 0x00, 0x00},
983 /* Abort: 0x04 is not translated here, see below */
984 /* Media change request */
985 {0x08, NOT_READY, 0x04, 0x00},
986 // FIXME: faking offline
987 /* SRV/IDNF - ID not found */
988 {0x10, ILLEGAL_REQUEST, 0x21, 0x00},
989 // Logical address out of range
990 /* MC - Media Changed */
991 {0x20, UNIT_ATTENTION, 0x28, 0x00},
992 // Not ready to ready change, medium may have changed
993 /* ECC - Uncorrectable ECC error */
994 {0x40, MEDIUM_ERROR, 0x11, 0x04},
995 // Unrecovered read error
996 /* BBD - block marked bad */
997 {0x80, MEDIUM_ERROR, 0x11, 0x04},
998 // Block marked bad Medium error, unrecovered read error
999 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1001 static const unsigned char stat_table[][4] = {
1002 /* Must be first because BUSY means no other bits valid */
1003 {0x80, ABORTED_COMMAND, 0x47, 0x00},
1004 // Busy, fake parity for now
1005 {0x40, ILLEGAL_REQUEST, 0x21, 0x04},
1006 // Device ready, unaligned write command
1007 {0x20, HARDWARE_ERROR, 0x44, 0x00},
1008 // Device fault, internal target failure
1009 {0x08, ABORTED_COMMAND, 0x47, 0x00},
1010 // Timed out in xfer, fake parity for now
1011 {0x04, RECOVERED_ERROR, 0x11, 0x00},
1012 // Recovered ECC error Medium error, recovered
1013 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1017 * Is this an error we can process/parse
1019 if (drv_stat & ATA_BUSY) {
1020 drv_err = 0; /* Ignore the err bits, they're invalid */
1024 /* Look for drv_err */
1025 for (i = 0; sense_table[i][0] != 0xFF; i++) {
1026 /* Look for best matches first */
1027 if ((sense_table[i][0] & drv_err) ==
1028 sense_table[i][0]) {
1029 *sk = sense_table[i][1];
1030 *asc = sense_table[i][2];
1031 *ascq = sense_table[i][3];
1032 goto translate_done;
1038 * Fall back to interpreting status bits. Note that if the drv_err
1039 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
1040 * is not descriptive enough.
1042 for (i = 0; stat_table[i][0] != 0xFF; i++) {
1043 if (stat_table[i][0] & drv_stat) {
1044 *sk = stat_table[i][1];
1045 *asc = stat_table[i][2];
1046 *ascq = stat_table[i][3];
1047 goto translate_done;
1052 * We need a sensible error return here, which is tricky, and one
1053 * that won't cause people to do things like return a disk wrongly.
1055 *sk = ABORTED_COMMAND;
1061 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
1062 id, drv_stat, drv_err, *sk, *asc, *ascq);
1067 * ata_gen_passthru_sense - Generate check condition sense block.
1068 * @qc: Command that completed.
1070 * This function is specific to the ATA descriptor format sense
1071 * block specified for the ATA pass through commands. Regardless
1072 * of whether the command errored or not, return a sense
1073 * block. Copy all controller registers into the sense
1074 * block. If there was no error, we get the request from an ATA
1075 * passthrough command, so we use the following sense data:
1076 * sk = RECOVERED ERROR
1077 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1083 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
1085 struct scsi_cmnd *cmd = qc->scsicmd;
1086 struct ata_taskfile *tf = &qc->result_tf;
1087 unsigned char *sb = cmd->sense_buffer;
1088 unsigned char *desc = sb + 8;
1089 int verbose = qc->ap->ops->error_handler == NULL;
1090 u8 sense_key, asc, ascq;
1092 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1094 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1097 * Use ata_to_sense_error() to map status register bits
1098 * onto sense key, asc & ascq.
1101 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1102 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1103 &sense_key, &asc, &ascq, verbose);
1104 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq);
1107 * ATA PASS-THROUGH INFORMATION AVAILABLE
1108 * Always in descriptor format sense.
1110 scsi_build_sense_buffer(1, cmd->sense_buffer,
1111 RECOVERED_ERROR, 0, 0x1D);
1114 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) {
1117 /* descriptor format */
1119 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9);
1121 if (SCSI_SENSE_BUFFERSIZE < len + 14)
1124 desc = sb + 8 + len;
1129 * Copy registers into sense buffer.
1132 desc[3] = tf->feature; /* == error reg */
1133 desc[5] = tf->nsect;
1136 desc[11] = tf->lbah;
1137 desc[12] = tf->device;
1138 desc[13] = tf->command; /* == status reg */
1141 * Fill in Extend bit, and the high order bytes
1144 if (tf->flags & ATA_TFLAG_LBA48) {
1146 desc[4] = tf->hob_nsect;
1147 desc[6] = tf->hob_lbal;
1148 desc[8] = tf->hob_lbam;
1149 desc[10] = tf->hob_lbah;
1152 /* Fixed sense format */
1153 desc[0] = tf->feature;
1154 desc[1] = tf->command; /* status */
1155 desc[2] = tf->device;
1156 desc[3] = tf->nsect;
1158 if (tf->flags & ATA_TFLAG_LBA48) {
1162 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah)
1166 desc[10] = tf->lbam;
1167 desc[11] = tf->lbah;
1172 * ata_gen_ata_sense - generate a SCSI fixed sense block
1173 * @qc: Command that we are erroring out
1175 * Generate sense block for a failed ATA command @qc. Descriptor
1176 * format is used to accommodate LBA48 block address.
1181 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1183 struct ata_device *dev = qc->dev;
1184 struct scsi_cmnd *cmd = qc->scsicmd;
1185 struct ata_taskfile *tf = &qc->result_tf;
1186 unsigned char *sb = cmd->sense_buffer;
1187 int verbose = qc->ap->ops->error_handler == NULL;
1189 u8 sense_key, asc, ascq;
1191 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1193 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1195 if (ata_dev_disabled(dev)) {
1196 /* Device disabled after error recovery */
1197 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
1198 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21);
1201 /* Use ata_to_sense_error() to map status register bits
1202 * onto sense key, asc & ascq.
1205 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1206 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1207 &sense_key, &asc, &ascq, verbose);
1208 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq);
1210 /* Could not decode error */
1211 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n",
1212 tf->command, qc->err_mask);
1213 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0);
1217 block = ata_tf_read_block(&qc->result_tf, dev);
1218 if (block == U64_MAX)
1221 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block);
1224 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1226 sdev->use_10_for_rw = 1;
1227 sdev->use_10_for_ms = 1;
1228 sdev->no_write_same = 1;
1230 /* Schedule policy is determined by ->qc_defer() callback and
1231 * it needs to see every deferred qc. Set dev_blocked to 1 to
1232 * prevent SCSI midlayer from automatically deferring
1235 sdev->max_device_blocked = 1;
1239 * atapi_drain_needed - Check whether data transfer may overflow
1240 * @rq: request to be checked
1242 * ATAPI commands which transfer variable length data to host
1243 * might overflow due to application error or hardware bug. This
1244 * function checks whether overflow should be drained and ignored
1251 * 1 if ; otherwise, 0.
1253 static int atapi_drain_needed(struct request *rq)
1255 if (likely(!blk_rq_is_passthrough(rq)))
1258 if (!blk_rq_bytes(rq) || op_is_write(req_op(rq)))
1261 return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC;
1264 static int ata_scsi_dev_config(struct scsi_device *sdev,
1265 struct ata_device *dev)
1267 struct request_queue *q = sdev->request_queue;
1269 if (!ata_id_has_unload(dev->id))
1270 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1272 /* configure max sectors */
1273 blk_queue_max_hw_sectors(q, dev->max_sectors);
1275 if (dev->class == ATA_DEV_ATAPI) {
1278 sdev->sector_size = ATA_SECT_SIZE;
1280 /* set DMA padding */
1281 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1283 /* configure draining */
1284 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1286 ata_dev_err(dev, "drain buffer allocation failed\n");
1290 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1292 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1293 sdev->manage_start_stop = 1;
1297 * ata_pio_sectors() expects buffer for each sector to not cross
1298 * page boundary. Enforce it by requiring buffers to be sector
1299 * aligned, which works iff sector_size is not larger than
1300 * PAGE_SIZE. ATAPI devices also need the alignment as
1301 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1303 if (sdev->sector_size > PAGE_SIZE)
1305 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1308 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1310 if (dev->flags & ATA_DFLAG_AN)
1311 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1313 if (dev->flags & ATA_DFLAG_NCQ) {
1316 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1317 depth = min(ATA_MAX_QUEUE, depth);
1318 scsi_change_queue_depth(sdev, depth);
1321 blk_queue_flush_queueable(q, false);
1323 if (dev->flags & ATA_DFLAG_TRUSTED)
1324 sdev->security_supported = 1;
1331 * ata_scsi_slave_config - Set SCSI device attributes
1332 * @sdev: SCSI device to examine
1334 * This is called before we actually start reading
1335 * and writing to the device, to configure certain
1336 * SCSI mid-layer behaviors.
1339 * Defined by SCSI layer. We don't really care.
1342 int ata_scsi_slave_config(struct scsi_device *sdev)
1344 struct ata_port *ap = ata_shost_to_port(sdev->host);
1345 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1348 ata_scsi_sdev_config(sdev);
1351 rc = ata_scsi_dev_config(sdev, dev);
1357 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1358 * @sdev: SCSI device to be destroyed
1360 * @sdev is about to be destroyed for hot/warm unplugging. If
1361 * this unplugging was initiated by libata as indicated by NULL
1362 * dev->sdev, this function doesn't have to do anything.
1363 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1364 * Clear dev->sdev, schedule the device for ATA detach and invoke
1368 * Defined by SCSI layer. We don't really care.
1370 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1372 struct ata_port *ap = ata_shost_to_port(sdev->host);
1373 struct request_queue *q = sdev->request_queue;
1374 unsigned long flags;
1375 struct ata_device *dev;
1377 if (!ap->ops->error_handler)
1380 spin_lock_irqsave(ap->lock, flags);
1381 dev = __ata_scsi_find_dev(ap, sdev);
1382 if (dev && dev->sdev) {
1383 /* SCSI device already in CANCEL state, no need to offline it */
1385 dev->flags |= ATA_DFLAG_DETACH;
1386 ata_port_schedule_eh(ap);
1388 spin_unlock_irqrestore(ap->lock, flags);
1390 kfree(q->dma_drain_buffer);
1391 q->dma_drain_buffer = NULL;
1392 q->dma_drain_size = 0;
1396 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1397 * @ap: ATA port to which the device change the queue depth
1398 * @sdev: SCSI device to configure queue depth for
1399 * @queue_depth: new queue depth
1401 * libsas and libata have different approaches for associating a sdev to
1405 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1408 struct ata_device *dev;
1409 unsigned long flags;
1411 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1412 return sdev->queue_depth;
1414 dev = ata_scsi_find_dev(ap, sdev);
1415 if (!dev || !ata_dev_enabled(dev))
1416 return sdev->queue_depth;
1419 spin_lock_irqsave(ap->lock, flags);
1420 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1421 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1422 dev->flags |= ATA_DFLAG_NCQ_OFF;
1425 spin_unlock_irqrestore(ap->lock, flags);
1427 /* limit and apply queue depth */
1428 queue_depth = min(queue_depth, sdev->host->can_queue);
1429 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1430 queue_depth = min(queue_depth, ATA_MAX_QUEUE);
1432 if (sdev->queue_depth == queue_depth)
1435 return scsi_change_queue_depth(sdev, queue_depth);
1439 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1440 * @sdev: SCSI device to configure queue depth for
1441 * @queue_depth: new queue depth
1443 * This is libata standard hostt->change_queue_depth callback.
1444 * SCSI will call into this callback when user tries to set queue
1448 * SCSI layer (we don't care)
1451 * Newly configured queue depth.
1453 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1455 struct ata_port *ap = ata_shost_to_port(sdev->host);
1457 return __ata_change_queue_depth(ap, sdev, queue_depth);
1461 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1462 * @qc: Storage for translated ATA taskfile
1464 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1465 * (to start). Perhaps these commands should be preceded by
1466 * CHECK POWER MODE to see what power mode the device is already in.
1467 * [See SAT revision 5 at www.t10.org]
1470 * spin_lock_irqsave(host lock)
1473 * Zero on success, non-zero on error.
1475 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1477 struct scsi_cmnd *scmd = qc->scsicmd;
1478 struct ata_taskfile *tf = &qc->tf;
1479 const u8 *cdb = scmd->cmnd;
1483 if (scmd->cmd_len < 5) {
1488 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1489 tf->protocol = ATA_PROT_NODATA;
1491 ; /* ignore IMMED bit, violates sat-r05 */
1496 goto invalid_fld; /* LOEJ bit set not supported */
1498 if (((cdb[4] >> 4) & 0xf) != 0) {
1501 goto invalid_fld; /* power conditions not supported */
1505 tf->nsect = 1; /* 1 sector, lba=0 */
1507 if (qc->dev->flags & ATA_DFLAG_LBA) {
1508 tf->flags |= ATA_TFLAG_LBA;
1513 tf->device |= ATA_LBA;
1516 tf->lbal = 0x1; /* sect */
1517 tf->lbam = 0x0; /* cyl low */
1518 tf->lbah = 0x0; /* cyl high */
1521 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1523 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1524 * or S5) causing some drives to spin up and down again.
1526 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1527 system_state == SYSTEM_POWER_OFF)
1530 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1531 system_entering_hibernation())
1534 /* Issue ATA STANDBY IMMEDIATE command */
1535 tf->command = ATA_CMD_STANDBYNOW1;
1539 * Standby and Idle condition timers could be implemented but that
1540 * would require libata to implement the Power condition mode page
1541 * and allow the user to change it. Changing mode pages requires
1542 * MODE SELECT to be implemented.
1548 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
1551 scmd->result = SAM_STAT_GOOD;
1557 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1558 * @qc: Storage for translated ATA taskfile
1560 * Sets up an ATA taskfile to issue FLUSH CACHE or
1564 * spin_lock_irqsave(host lock)
1567 * Zero on success, non-zero on error.
1569 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1571 struct ata_taskfile *tf = &qc->tf;
1573 tf->flags |= ATA_TFLAG_DEVICE;
1574 tf->protocol = ATA_PROT_NODATA;
1576 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1577 tf->command = ATA_CMD_FLUSH_EXT;
1579 tf->command = ATA_CMD_FLUSH;
1581 /* flush is critical for IO integrity, consider it an IO command */
1582 qc->flags |= ATA_QCFLAG_IO;
1588 * scsi_6_lba_len - Get LBA and transfer length
1589 * @cdb: SCSI command to translate
1591 * Calculate LBA and transfer length for 6-byte commands.
1595 * @plen: the transfer length
1597 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1602 VPRINTK("six-byte command\n");
1604 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1605 lba |= ((u64)cdb[2]) << 8;
1606 lba |= ((u64)cdb[3]);
1615 * scsi_10_lba_len - Get LBA and transfer length
1616 * @cdb: SCSI command to translate
1618 * Calculate LBA and transfer length for 10-byte commands.
1622 * @plen: the transfer length
1624 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1629 VPRINTK("ten-byte command\n");
1631 lba |= ((u64)cdb[2]) << 24;
1632 lba |= ((u64)cdb[3]) << 16;
1633 lba |= ((u64)cdb[4]) << 8;
1634 lba |= ((u64)cdb[5]);
1636 len |= ((u32)cdb[7]) << 8;
1637 len |= ((u32)cdb[8]);
1644 * scsi_16_lba_len - Get LBA and transfer length
1645 * @cdb: SCSI command to translate
1647 * Calculate LBA and transfer length for 16-byte commands.
1651 * @plen: the transfer length
1653 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1658 VPRINTK("sixteen-byte command\n");
1660 lba |= ((u64)cdb[2]) << 56;
1661 lba |= ((u64)cdb[3]) << 48;
1662 lba |= ((u64)cdb[4]) << 40;
1663 lba |= ((u64)cdb[5]) << 32;
1664 lba |= ((u64)cdb[6]) << 24;
1665 lba |= ((u64)cdb[7]) << 16;
1666 lba |= ((u64)cdb[8]) << 8;
1667 lba |= ((u64)cdb[9]);
1669 len |= ((u32)cdb[10]) << 24;
1670 len |= ((u32)cdb[11]) << 16;
1671 len |= ((u32)cdb[12]) << 8;
1672 len |= ((u32)cdb[13]);
1679 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1680 * @qc: Storage for translated ATA taskfile
1682 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1685 * spin_lock_irqsave(host lock)
1688 * Zero on success, non-zero on error.
1690 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1692 struct scsi_cmnd *scmd = qc->scsicmd;
1693 struct ata_taskfile *tf = &qc->tf;
1694 struct ata_device *dev = qc->dev;
1695 u64 dev_sectors = qc->dev->n_sectors;
1696 const u8 *cdb = scmd->cmnd;
1701 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1702 tf->protocol = ATA_PROT_NODATA;
1704 if (cdb[0] == VERIFY) {
1705 if (scmd->cmd_len < 10) {
1709 scsi_10_lba_len(cdb, &block, &n_block);
1710 } else if (cdb[0] == VERIFY_16) {
1711 if (scmd->cmd_len < 16) {
1715 scsi_16_lba_len(cdb, &block, &n_block);
1723 if (block >= dev_sectors)
1725 if ((block + n_block) > dev_sectors)
1728 if (dev->flags & ATA_DFLAG_LBA) {
1729 tf->flags |= ATA_TFLAG_LBA;
1731 if (lba_28_ok(block, n_block)) {
1733 tf->command = ATA_CMD_VERIFY;
1734 tf->device |= (block >> 24) & 0xf;
1735 } else if (lba_48_ok(block, n_block)) {
1736 if (!(dev->flags & ATA_DFLAG_LBA48))
1740 tf->flags |= ATA_TFLAG_LBA48;
1741 tf->command = ATA_CMD_VERIFY_EXT;
1743 tf->hob_nsect = (n_block >> 8) & 0xff;
1745 tf->hob_lbah = (block >> 40) & 0xff;
1746 tf->hob_lbam = (block >> 32) & 0xff;
1747 tf->hob_lbal = (block >> 24) & 0xff;
1749 /* request too large even for LBA48 */
1752 tf->nsect = n_block & 0xff;
1754 tf->lbah = (block >> 16) & 0xff;
1755 tf->lbam = (block >> 8) & 0xff;
1756 tf->lbal = block & 0xff;
1758 tf->device |= ATA_LBA;
1761 u32 sect, head, cyl, track;
1763 if (!lba_28_ok(block, n_block))
1766 /* Convert LBA to CHS */
1767 track = (u32)block / dev->sectors;
1768 cyl = track / dev->heads;
1769 head = track % dev->heads;
1770 sect = (u32)block % dev->sectors + 1;
1772 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1773 (u32)block, track, cyl, head, sect);
1775 /* Check whether the converted CHS can fit.
1779 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1782 tf->command = ATA_CMD_VERIFY;
1783 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1786 tf->lbah = cyl >> 8;
1793 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1797 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1798 /* "Logical Block Address out of range" */
1802 scmd->result = SAM_STAT_GOOD;
1806 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks)
1808 struct request *rq = scmd->request;
1811 if (!blk_rq_is_passthrough(rq))
1814 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size;
1815 if (n_blocks > req_blocks)
1822 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1823 * @qc: Storage for translated ATA taskfile
1825 * Converts any of six SCSI read/write commands into the
1826 * ATA counterpart, including starting sector (LBA),
1827 * sector count, and taking into account the device's LBA48
1830 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1831 * %WRITE_16 are currently supported.
1834 * spin_lock_irqsave(host lock)
1837 * Zero on success, non-zero on error.
1839 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1841 struct scsi_cmnd *scmd = qc->scsicmd;
1842 const u8 *cdb = scmd->cmnd;
1843 struct request *rq = scmd->request;
1844 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
1845 unsigned int tf_flags = 0;
1851 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1852 tf_flags |= ATA_TFLAG_WRITE;
1854 /* Calculate the SCSI LBA, transfer length and FUA. */
1858 if (unlikely(scmd->cmd_len < 10)) {
1862 scsi_10_lba_len(cdb, &block, &n_block);
1863 if (cdb[1] & (1 << 3))
1864 tf_flags |= ATA_TFLAG_FUA;
1865 if (!ata_check_nblocks(scmd, n_block))
1870 if (unlikely(scmd->cmd_len < 6)) {
1874 scsi_6_lba_len(cdb, &block, &n_block);
1876 /* for 6-byte r/w commands, transfer length 0
1877 * means 256 blocks of data, not 0 block.
1881 if (!ata_check_nblocks(scmd, n_block))
1886 if (unlikely(scmd->cmd_len < 16)) {
1890 scsi_16_lba_len(cdb, &block, &n_block);
1891 if (cdb[1] & (1 << 3))
1892 tf_flags |= ATA_TFLAG_FUA;
1893 if (!ata_check_nblocks(scmd, n_block))
1897 DPRINTK("no-byte command\n");
1902 /* Check and compose ATA command */
1904 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1905 * length 0 means transfer 0 block of data.
1906 * However, for ATA R/W commands, sector count 0 means
1907 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1909 * WARNING: one or two older ATA drives treat 0 as 0...
1913 qc->flags |= ATA_QCFLAG_IO;
1914 qc->nbytes = n_block * scmd->device->sector_size;
1916 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1919 if (likely(rc == 0))
1924 /* treat all other errors as -EINVAL, fall through */
1926 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1930 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1931 /* "Logical Block Address out of range" */
1935 scmd->result = SAM_STAT_GOOD;
1939 static void ata_qc_done(struct ata_queued_cmd *qc)
1941 struct scsi_cmnd *cmd = qc->scsicmd;
1942 void (*done)(struct scsi_cmnd *) = qc->scsidone;
1948 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1950 struct ata_port *ap = qc->ap;
1951 struct scsi_cmnd *cmd = qc->scsicmd;
1952 u8 *cdb = cmd->cmnd;
1953 int need_sense = (qc->err_mask != 0);
1955 /* For ATA pass thru (SAT) commands, generate a sense block if
1956 * user mandated it or if there's an error. Note that if we
1957 * generate because the user forced us to [CK_COND =1], a check
1958 * condition is generated and the ATA register values are returned
1959 * whether the command completed successfully or not. If there
1960 * was no error, we use the following sense data:
1961 * sk = RECOVERED ERROR
1962 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1964 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1965 ((cdb[2] & 0x20) || need_sense))
1966 ata_gen_passthru_sense(qc);
1967 else if (qc->flags & ATA_QCFLAG_SENSE_VALID)
1968 cmd->result = SAM_STAT_CHECK_CONDITION;
1969 else if (need_sense)
1970 ata_gen_ata_sense(qc);
1972 cmd->result = SAM_STAT_GOOD;
1974 if (need_sense && !ap->ops->error_handler)
1975 ata_dump_status(ap->print_id, &qc->result_tf);
1981 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1982 * @dev: ATA device to which the command is addressed
1983 * @cmd: SCSI command to execute
1984 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1986 * Our ->queuecommand() function has decided that the SCSI
1987 * command issued can be directly translated into an ATA
1988 * command, rather than handled internally.
1990 * This function sets up an ata_queued_cmd structure for the
1991 * SCSI command, and sends that ata_queued_cmd to the hardware.
1993 * The xlat_func argument (actor) returns 0 if ready to execute
1994 * ATA command, else 1 to finish translation. If 1 is returned
1995 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1996 * to be set reflecting an error condition or clean (early)
2000 * spin_lock_irqsave(host lock)
2003 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
2004 * needs to be deferred.
2006 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
2007 ata_xlat_func_t xlat_func)
2009 struct ata_port *ap = dev->link->ap;
2010 struct ata_queued_cmd *qc;
2015 qc = ata_scsi_qc_new(dev, cmd);
2019 /* data is present; dma-map it */
2020 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
2021 cmd->sc_data_direction == DMA_TO_DEVICE) {
2022 if (unlikely(scsi_bufflen(cmd) < 1)) {
2023 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
2027 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
2029 qc->dma_dir = cmd->sc_data_direction;
2032 qc->complete_fn = ata_scsi_qc_complete;
2037 if (ap->ops->qc_defer) {
2038 if ((rc = ap->ops->qc_defer(qc)))
2042 /* select device, send command to hardware */
2050 cmd->scsi_done(cmd);
2051 DPRINTK("EXIT - early finish (good or error)\n");
2056 cmd->result = (DID_ERROR << 16);
2057 cmd->scsi_done(cmd);
2059 DPRINTK("EXIT - internal\n");
2064 DPRINTK("EXIT - defer\n");
2065 if (rc == ATA_DEFER_LINK)
2066 return SCSI_MLQUEUE_DEVICE_BUSY;
2068 return SCSI_MLQUEUE_HOST_BUSY;
2071 struct ata_scsi_args {
2072 struct ata_device *dev;
2074 struct scsi_cmnd *cmd;
2078 * ata_scsi_rbuf_get - Map response buffer.
2079 * @cmd: SCSI command containing buffer to be mapped.
2080 * @flags: unsigned long variable to store irq enable status
2081 * @copy_in: copy in from user buffer
2083 * Prepare buffer for simulated SCSI commands.
2086 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
2089 * Pointer to response buffer.
2091 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
2092 unsigned long *flags)
2094 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
2096 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
2098 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2099 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2100 return ata_scsi_rbuf;
2104 * ata_scsi_rbuf_put - Unmap response buffer.
2105 * @cmd: SCSI command containing buffer to be unmapped.
2106 * @copy_out: copy out result
2107 * @flags: @flags passed to ata_scsi_rbuf_get()
2109 * Returns rbuf buffer. The result is copied to @cmd's buffer if
2110 * @copy_back is true.
2113 * Unlocks ata_scsi_rbuf_lock.
2115 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
2116 unsigned long *flags)
2119 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2120 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2121 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
2125 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
2126 * @args: device IDENTIFY data / SCSI command of interest.
2127 * @actor: Callback hook for desired SCSI command simulator
2129 * Takes care of the hard work of simulating a SCSI command...
2130 * Mapping the response buffer, calling the command's handler,
2131 * and handling the handler's return value. This return value
2132 * indicates whether the handler wishes the SCSI command to be
2133 * completed successfully (0), or not (in which case cmd->result
2134 * and sense buffer are assumed to be set).
2137 * spin_lock_irqsave(host lock)
2139 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
2140 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
2144 struct scsi_cmnd *cmd = args->cmd;
2145 unsigned long flags;
2147 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
2148 rc = actor(args, rbuf);
2149 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
2152 cmd->result = SAM_STAT_GOOD;
2156 * ata_scsiop_inq_std - Simulate INQUIRY command
2157 * @args: device IDENTIFY data / SCSI command of interest.
2158 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2160 * Returns standard device identification data associated
2161 * with non-VPD INQUIRY command output.
2164 * spin_lock_irqsave(host lock)
2166 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
2168 static const u8 versions[] = {
2170 0x60, /* SAM-3 (no version claimed) */
2173 0x20, /* SBC-2 (no version claimed) */
2176 0x00 /* SPC-3 (no version claimed) */
2178 static const u8 versions_zbc[] = {
2180 0xA0, /* SAM-5 (no version claimed) */
2183 0x00, /* SBC-4 (no version claimed) */
2186 0xC0, /* SPC-5 (no version claimed) */
2195 0x5, /* claim SPC-3 version compatibility */
2205 /* set scsi removable (RMB) bit per ata bit, or if the
2206 * AHCI port says it's external (Hotplug-capable, eSATA).
2208 if (ata_id_removable(args->id) ||
2209 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL))
2212 if (args->dev->class == ATA_DEV_ZAC) {
2214 hdr[2] = 0x7; /* claim SPC-5 version compatibility */
2217 memcpy(rbuf, hdr, sizeof(hdr));
2218 memcpy(&rbuf[8], "ATA ", 8);
2219 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
2221 /* From SAT, use last 2 words from fw rev unless they are spaces */
2222 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
2223 if (strncmp(&rbuf[32], " ", 4) == 0)
2224 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2226 if (rbuf[32] == 0 || rbuf[32] == ' ')
2227 memcpy(&rbuf[32], "n/a ", 4);
2229 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC)
2230 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc));
2232 memcpy(rbuf + 58, versions, sizeof(versions));
2238 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2239 * @args: device IDENTIFY data / SCSI command of interest.
2240 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2242 * Returns list of inquiry VPD pages available.
2245 * spin_lock_irqsave(host lock)
2247 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
2250 static const u8 pages[] = {
2251 0x00, /* page 0x00, this page */
2252 0x80, /* page 0x80, unit serial no page */
2253 0x83, /* page 0x83, device ident page */
2254 0x89, /* page 0x89, ata info page */
2255 0xb0, /* page 0xb0, block limits page */
2256 0xb1, /* page 0xb1, block device characteristics page */
2257 0xb2, /* page 0xb2, thin provisioning page */
2258 0xb6, /* page 0xb6, zoned block device characteristics */
2261 num_pages = sizeof(pages);
2262 if (!(args->dev->flags & ATA_DFLAG_ZAC))
2264 rbuf[3] = num_pages; /* number of supported VPD pages */
2265 memcpy(rbuf + 4, pages, num_pages);
2270 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2271 * @args: device IDENTIFY data / SCSI command of interest.
2272 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2274 * Returns ATA device serial number.
2277 * spin_lock_irqsave(host lock)
2279 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2281 static const u8 hdr[] = {
2283 0x80, /* this page code */
2285 ATA_ID_SERNO_LEN, /* page len */
2288 memcpy(rbuf, hdr, sizeof(hdr));
2289 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2290 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2295 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2296 * @args: device IDENTIFY data / SCSI command of interest.
2297 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2299 * Yields two logical unit device identification designators:
2300 * - vendor specific ASCII containing the ATA serial number
2301 * - SAT defined "t10 vendor id based" containing ASCII vendor
2302 * name ("ATA "), model and serial numbers.
2305 * spin_lock_irqsave(host lock)
2307 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2309 const int sat_model_serial_desc_len = 68;
2312 rbuf[1] = 0x83; /* this page code */
2315 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2317 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2319 ata_id_string(args->id, (unsigned char *) rbuf + num,
2320 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2321 num += ATA_ID_SERNO_LEN;
2323 /* SAT defined lu model and serial numbers descriptor */
2324 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2327 rbuf[num + 3] = sat_model_serial_desc_len;
2329 memcpy(rbuf + num, "ATA ", 8);
2331 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2333 num += ATA_ID_PROD_LEN;
2334 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2336 num += ATA_ID_SERNO_LEN;
2338 if (ata_id_has_wwn(args->id)) {
2339 /* SAT defined lu world wide name */
2340 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2343 rbuf[num + 3] = ATA_ID_WWN_LEN;
2345 ata_id_string(args->id, (unsigned char *) rbuf + num,
2346 ATA_ID_WWN, ATA_ID_WWN_LEN);
2347 num += ATA_ID_WWN_LEN;
2349 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2354 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2355 * @args: device IDENTIFY data / SCSI command of interest.
2356 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2358 * Yields SAT-specified ATA VPD page.
2361 * spin_lock_irqsave(host lock)
2363 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2365 struct ata_taskfile tf;
2367 memset(&tf, 0, sizeof(tf));
2369 rbuf[1] = 0x89; /* our page code */
2370 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2371 rbuf[3] = (0x238 & 0xff);
2373 memcpy(&rbuf[8], "linux ", 8);
2374 memcpy(&rbuf[16], "libata ", 16);
2375 memcpy(&rbuf[32], DRV_VERSION, 4);
2377 /* we don't store the ATA device signature, so we fake it */
2379 tf.command = ATA_DRDY; /* really, this is Status reg */
2383 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2384 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2386 rbuf[56] = ATA_CMD_ID_ATA;
2388 memcpy(&rbuf[60], &args->id[0], 512);
2392 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2394 struct ata_device *dev = args->dev;
2398 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2401 * Optimal transfer length granularity.
2403 * This is always one physical block, but for disks with a smaller
2404 * logical than physical sector size we need to figure out what the
2407 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2408 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2411 * Optimal unmap granularity.
2413 * The ATA spec doesn't even know about a granularity or alignment
2414 * for the TRIM command. We can leave away most of the unmap related
2415 * VPD page entries, but we have specifify a granularity to signal
2416 * that we support some form of unmap - in thise case via WRITE SAME
2417 * with the unmap bit set.
2419 if (ata_id_has_trim(args->id)) {
2420 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM;
2422 if (dev->horkage & ATA_HORKAGE_MAX_TRIM_128M)
2423 max_blocks = 128 << (20 - SECTOR_SHIFT);
2425 put_unaligned_be64(max_blocks, &rbuf[36]);
2426 put_unaligned_be32(1, &rbuf[28]);
2432 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2434 int form_factor = ata_id_form_factor(args->id);
2435 int media_rotation_rate = ata_id_rotation_rate(args->id);
2436 u8 zoned = ata_id_zoned_cap(args->id);
2440 rbuf[4] = media_rotation_rate >> 8;
2441 rbuf[5] = media_rotation_rate;
2442 rbuf[7] = form_factor;
2444 rbuf[8] = (zoned << 4);
2449 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2451 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2454 rbuf[5] = 1 << 6; /* TPWS */
2459 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf)
2462 * zbc-r05 SCSI Zoned Block device characteristics VPD page
2468 * URSWRZ bit is only meaningful for host-managed ZAC drives
2470 if (args->dev->zac_zoned_cap & 1)
2472 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]);
2473 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]);
2474 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]);
2480 * modecpy - Prepare response for MODE SENSE
2481 * @dest: output buffer
2482 * @src: data being copied
2483 * @n: length of mode page
2484 * @changeable: whether changeable parameters are requested
2486 * Generate a generic MODE SENSE page for either current or changeable
2492 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2495 memcpy(dest, src, 2);
2496 memset(dest + 2, 0, n - 2);
2498 memcpy(dest, src, n);
2503 * ata_msense_caching - Simulate MODE SENSE caching info page
2504 * @id: device IDENTIFY data
2505 * @buf: output buffer
2506 * @changeable: whether changeable parameters are requested
2508 * Generate a caching info page, which conditionally indicates
2509 * write caching to the SCSI layer, depending on device
2515 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2517 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2519 buf[2] |= (1 << 2); /* ata_mselect_caching() */
2521 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */
2522 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */
2524 return sizeof(def_cache_mpage);
2528 * ata_msense_control - Simulate MODE SENSE control mode page
2529 * @dev: ATA device of interest
2530 * @buf: output buffer
2531 * @changeable: whether changeable parameters are requested
2533 * Generate a generic MODE SENSE control mode page.
2538 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf,
2541 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2543 buf[2] |= (1 << 2); /* ata_mselect_control() */
2545 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
2547 buf[2] |= (d_sense << 2); /* descriptor format sense data */
2549 return sizeof(def_control_mpage);
2553 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2554 * @buf: output buffer
2555 * @changeable: whether changeable parameters are requested
2557 * Generate a generic MODE SENSE r/w error recovery page.
2562 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2564 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2566 return sizeof(def_rw_recovery_mpage);
2570 * We can turn this into a real blacklist if it's needed, for now just
2571 * blacklist any Maxtor BANC1G10 revision firmware
2573 static int ata_dev_supports_fua(u16 *id)
2575 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2579 if (!ata_id_has_fua(id))
2582 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2583 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2585 if (strcmp(model, "Maxtor"))
2587 if (strcmp(fw, "BANC1G10"))
2590 return 0; /* blacklisted */
2594 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2595 * @args: device IDENTIFY data / SCSI command of interest.
2596 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2598 * Simulate MODE SENSE commands. Assume this is invoked for direct
2599 * access devices (e.g. disks) only. There should be no block
2600 * descriptor for other device types.
2603 * spin_lock_irqsave(host lock)
2605 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2607 struct ata_device *dev = args->dev;
2608 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2609 static const u8 sat_blk_desc[] = {
2610 0, 0, 0, 0, /* number of blocks: sat unspecified */
2612 0, 0x2, 0x0 /* block length: 512 bytes */
2615 unsigned int ebd, page_control, six_byte;
2616 u8 dpofua, bp = 0xff;
2621 six_byte = (scsicmd[0] == MODE_SENSE);
2622 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2624 * LLBA bit in msense(10) ignored (compliant)
2627 page_control = scsicmd[2] >> 6;
2628 switch (page_control) {
2629 case 0: /* current */
2630 case 1: /* changeable */
2631 case 2: /* defaults */
2632 break; /* supported */
2634 goto saving_not_supp;
2642 p += 4 + (ebd ? 8 : 0);
2644 p += 8 + (ebd ? 8 : 0);
2646 pg = scsicmd[2] & 0x3f;
2649 * No mode subpages supported (yet) but asking for _all_
2650 * subpages may be valid
2652 if (spg && (spg != ALL_SUB_MPAGES)) {
2658 case RW_RECOVERY_MPAGE:
2659 p += ata_msense_rw_recovery(p, page_control == 1);
2663 p += ata_msense_caching(args->id, p, page_control == 1);
2667 p += ata_msense_control(args->dev, p, page_control == 1);
2671 p += ata_msense_rw_recovery(p, page_control == 1);
2672 p += ata_msense_caching(args->id, p, page_control == 1);
2673 p += ata_msense_control(args->dev, p, page_control == 1);
2676 default: /* invalid page code */
2682 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2683 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2687 rbuf[0] = p - rbuf - 1;
2690 rbuf[3] = sizeof(sat_blk_desc);
2691 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2694 unsigned int output_len = p - rbuf - 2;
2696 rbuf[0] = output_len >> 8;
2697 rbuf[1] = output_len;
2700 rbuf[7] = sizeof(sat_blk_desc);
2701 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2707 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp);
2711 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2712 /* "Saving parameters not supported" */
2717 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2718 * @args: device IDENTIFY data / SCSI command of interest.
2719 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2721 * Simulate READ CAPACITY commands.
2726 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2728 struct ata_device *dev = args->dev;
2729 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2730 u32 sector_size; /* physical sector size in bytes */
2734 sector_size = ata_id_logical_sector_size(dev->id);
2735 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2736 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2740 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2741 if (last_lba >= 0xffffffffULL)
2742 last_lba = 0xffffffff;
2744 /* sector count, 32-bit */
2745 rbuf[0] = last_lba >> (8 * 3);
2746 rbuf[1] = last_lba >> (8 * 2);
2747 rbuf[2] = last_lba >> (8 * 1);
2751 rbuf[4] = sector_size >> (8 * 3);
2752 rbuf[5] = sector_size >> (8 * 2);
2753 rbuf[6] = sector_size >> (8 * 1);
2754 rbuf[7] = sector_size;
2756 /* sector count, 64-bit */
2757 rbuf[0] = last_lba >> (8 * 7);
2758 rbuf[1] = last_lba >> (8 * 6);
2759 rbuf[2] = last_lba >> (8 * 5);
2760 rbuf[3] = last_lba >> (8 * 4);
2761 rbuf[4] = last_lba >> (8 * 3);
2762 rbuf[5] = last_lba >> (8 * 2);
2763 rbuf[6] = last_lba >> (8 * 1);
2767 rbuf[ 8] = sector_size >> (8 * 3);
2768 rbuf[ 9] = sector_size >> (8 * 2);
2769 rbuf[10] = sector_size >> (8 * 1);
2770 rbuf[11] = sector_size;
2773 rbuf[13] = log2_per_phys;
2774 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2775 rbuf[15] = lowest_aligned;
2777 if (ata_id_has_trim(args->id) &&
2778 !(dev->horkage & ATA_HORKAGE_NOTRIM)) {
2779 rbuf[14] |= 0x80; /* LBPME */
2781 if (ata_id_has_zero_after_trim(args->id) &&
2782 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) {
2783 ata_dev_info(dev, "Enabling discard_zeroes_data\n");
2784 rbuf[14] |= 0x40; /* LBPRZ */
2787 if (ata_id_zoned_cap(args->id) ||
2788 args->dev->class == ATA_DEV_ZAC)
2789 rbuf[12] = (1 << 4); /* RC_BASIS */
2795 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2796 * @args: device IDENTIFY data / SCSI command of interest.
2797 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2799 * Simulate REPORT LUNS command.
2802 * spin_lock_irqsave(host lock)
2804 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2807 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2812 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2814 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2815 /* FIXME: not quite right; we don't want the
2816 * translation of taskfile registers into
2817 * a sense descriptors, since that's only
2818 * correct for ATA, not ATAPI
2820 ata_gen_passthru_sense(qc);
2826 /* is it pointless to prefer PIO for "safety reasons"? */
2827 static inline int ata_pio_use_silly(struct ata_port *ap)
2829 return (ap->flags & ATA_FLAG_PIO_DMA);
2832 static void atapi_request_sense(struct ata_queued_cmd *qc)
2834 struct ata_port *ap = qc->ap;
2835 struct scsi_cmnd *cmd = qc->scsicmd;
2837 DPRINTK("ATAPI request sense\n");
2839 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2841 #ifdef CONFIG_ATA_SFF
2842 if (ap->ops->sff_tf_read)
2843 ap->ops->sff_tf_read(ap, &qc->tf);
2846 /* fill these in, for the case where they are -not- overwritten */
2847 cmd->sense_buffer[0] = 0x70;
2848 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2852 /* setup sg table and init transfer direction */
2853 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2854 ata_sg_init(qc, &qc->sgent, 1);
2855 qc->dma_dir = DMA_FROM_DEVICE;
2857 memset(&qc->cdb, 0, qc->dev->cdb_len);
2858 qc->cdb[0] = REQUEST_SENSE;
2859 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2861 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2862 qc->tf.command = ATA_CMD_PACKET;
2864 if (ata_pio_use_silly(ap)) {
2865 qc->tf.protocol = ATAPI_PROT_DMA;
2866 qc->tf.feature |= ATAPI_PKT_DMA;
2868 qc->tf.protocol = ATAPI_PROT_PIO;
2869 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2872 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2874 qc->complete_fn = atapi_sense_complete;
2882 * ATAPI devices typically report zero for their SCSI version, and sometimes
2883 * deviate from the spec WRT response data format. If SCSI version is
2884 * reported as zero like normal, then we make the following fixups:
2885 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a
2887 * 2) Ensure response data format / ATAPI information are always correct.
2889 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd)
2893 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2898 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2901 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2903 struct scsi_cmnd *cmd = qc->scsicmd;
2904 unsigned int err_mask = qc->err_mask;
2906 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2908 /* handle completion from new EH */
2909 if (unlikely(qc->ap->ops->error_handler &&
2910 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2912 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2913 /* FIXME: not quite right; we don't want the
2914 * translation of taskfile registers into a
2915 * sense descriptors, since that's only
2916 * correct for ATA, not ATAPI
2918 ata_gen_passthru_sense(qc);
2921 /* SCSI EH automatically locks door if sdev->locked is
2922 * set. Sometimes door lock request continues to
2923 * fail, for example, when no media is present. This
2924 * creates a loop - SCSI EH issues door lock which
2925 * fails and gets invoked again to acquire sense data
2926 * for the failed command.
2928 * If door lock fails, always clear sdev->locked to
2929 * avoid this infinite loop.
2931 * This may happen before SCSI scan is complete. Make
2932 * sure qc->dev->sdev isn't NULL before dereferencing.
2934 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2935 qc->dev->sdev->locked = 0;
2937 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2942 /* successful completion or old EH failure path */
2943 if (unlikely(err_mask & AC_ERR_DEV)) {
2944 cmd->result = SAM_STAT_CHECK_CONDITION;
2945 atapi_request_sense(qc);
2947 } else if (unlikely(err_mask)) {
2948 /* FIXME: not quite right; we don't want the
2949 * translation of taskfile registers into
2950 * a sense descriptors, since that's only
2951 * correct for ATA, not ATAPI
2953 ata_gen_passthru_sense(qc);
2955 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0)
2956 atapi_fixup_inquiry(cmd);
2957 cmd->result = SAM_STAT_GOOD;
2963 * atapi_xlat - Initialize PACKET taskfile
2964 * @qc: command structure to be initialized
2967 * spin_lock_irqsave(host lock)
2970 * Zero on success, non-zero on failure.
2972 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2974 struct scsi_cmnd *scmd = qc->scsicmd;
2975 struct ata_device *dev = qc->dev;
2976 int nodata = (scmd->sc_data_direction == DMA_NONE);
2977 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2978 unsigned int nbytes;
2980 memset(qc->cdb, 0, dev->cdb_len);
2981 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2983 qc->complete_fn = atapi_qc_complete;
2985 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2986 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2987 qc->tf.flags |= ATA_TFLAG_WRITE;
2988 DPRINTK("direction: write\n");
2991 qc->tf.command = ATA_CMD_PACKET;
2992 ata_qc_set_pc_nbytes(qc);
2994 /* check whether ATAPI DMA is safe */
2995 if (!nodata && !using_pio && atapi_check_dma(qc))
2998 /* Some controller variants snoop this value for Packet
2999 * transfers to do state machine and FIFO management. Thus we
3000 * want to set it properly, and for DMA where it is
3001 * effectively meaningless.
3003 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
3005 /* Most ATAPI devices which honor transfer chunk size don't
3006 * behave according to the spec when odd chunk size which
3007 * matches the transfer length is specified. If the number of
3008 * bytes to transfer is 2n+1. According to the spec, what
3009 * should happen is to indicate that 2n+1 is going to be
3010 * transferred and transfer 2n+2 bytes where the last byte is
3013 * In practice, this doesn't happen. ATAPI devices first
3014 * indicate and transfer 2n bytes and then indicate and
3015 * transfer 2 bytes where the last byte is padding.
3017 * This inconsistency confuses several controllers which
3018 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
3019 * These controllers use actual number of transferred bytes to
3020 * update DMA poitner and transfer of 4n+2 bytes make those
3021 * controller push DMA pointer by 4n+4 bytes because SATA data
3022 * FISes are aligned to 4 bytes. This causes data corruption
3023 * and buffer overrun.
3025 * Always setting nbytes to even number solves this problem
3026 * because then ATAPI devices don't have to split data at 2n
3032 qc->tf.lbam = (nbytes & 0xFF);
3033 qc->tf.lbah = (nbytes >> 8);
3036 qc->tf.protocol = ATAPI_PROT_NODATA;
3038 qc->tf.protocol = ATAPI_PROT_PIO;
3041 qc->tf.protocol = ATAPI_PROT_DMA;
3042 qc->tf.feature |= ATAPI_PKT_DMA;
3044 if ((dev->flags & ATA_DFLAG_DMADIR) &&
3045 (scmd->sc_data_direction != DMA_TO_DEVICE))
3046 /* some SATA bridges need us to indicate data xfer direction */
3047 qc->tf.feature |= ATAPI_DMADIR;
3051 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
3052 as ATAPI tape drives don't get this right otherwise */
3056 static struct ata_device *ata_find_dev(struct ata_port *ap, unsigned int devno)
3059 * For the non-PMP case, ata_link_max_devices() returns 1 (SATA case),
3060 * or 2 (IDE master + slave case). However, the former case includes
3061 * libsas hosted devices which are numbered per scsi host, leading
3062 * to devno potentially being larger than 0 but with each struct
3063 * ata_device having its own struct ata_port and struct ata_link.
3064 * To accommodate these, ignore devno and always use device number 0.
3066 if (likely(!sata_pmp_attached(ap))) {
3067 int link_max_devices = ata_link_max_devices(&ap->link);
3069 if (link_max_devices == 1)
3070 return &ap->link.device[0];
3072 if (devno < link_max_devices)
3073 return &ap->link.device[devno];
3079 * For PMP-attached devices, the device number corresponds to C
3080 * (channel) of SCSI [H:C:I:L], indicating the port pmp link
3083 if (devno < ap->nr_pmp_links)
3084 return &ap->pmp_link[devno].device[0];
3089 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
3090 const struct scsi_device *scsidev)
3094 /* skip commands not addressed to targets we simulate */
3095 if (!sata_pmp_attached(ap)) {
3096 if (unlikely(scsidev->channel || scsidev->lun))
3098 devno = scsidev->id;
3100 if (unlikely(scsidev->id || scsidev->lun))
3102 devno = scsidev->channel;
3105 return ata_find_dev(ap, devno);
3109 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
3110 * @ap: ATA port to which the device is attached
3111 * @scsidev: SCSI device from which we derive the ATA device
3113 * Given various information provided in struct scsi_cmnd,
3114 * map that onto an ATA bus, and using that mapping
3115 * determine which ata_device is associated with the
3116 * SCSI command to be sent.
3119 * spin_lock_irqsave(host lock)
3122 * Associated ATA device, or %NULL if not found.
3124 static struct ata_device *
3125 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
3127 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
3129 if (unlikely(!dev || !ata_dev_enabled(dev)))
3136 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
3137 * @byte1: Byte 1 from pass-thru CDB.
3140 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
3143 ata_scsi_map_proto(u8 byte1)
3145 switch((byte1 & 0x1e) >> 1) {
3146 case 3: /* Non-data */
3147 return ATA_PROT_NODATA;
3150 case 10: /* UDMA Data-in */
3151 case 11: /* UDMA Data-Out */
3152 return ATA_PROT_DMA;
3154 case 4: /* PIO Data-in */
3155 case 5: /* PIO Data-out */
3156 return ATA_PROT_PIO;
3158 case 12: /* FPDMA */
3159 return ATA_PROT_NCQ;
3161 case 0: /* Hard Reset */
3163 case 8: /* Device Diagnostic */
3164 case 9: /* Device Reset */
3165 case 7: /* DMA Queued */
3166 case 15: /* Return Response Info */
3167 default: /* Reserved */
3171 return ATA_PROT_UNKNOWN;
3175 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
3176 * @qc: command structure to be initialized
3178 * Handles either 12, 16, or 32-byte versions of the CDB.
3181 * Zero on success, non-zero on failure.
3183 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
3185 struct ata_taskfile *tf = &(qc->tf);
3186 struct scsi_cmnd *scmd = qc->scsicmd;
3187 struct ata_device *dev = qc->dev;
3188 const u8 *cdb = scmd->cmnd;
3192 /* 7Fh variable length cmd means a ata pass-thru(32) */
3193 if (cdb[0] == VARIABLE_LENGTH_CMD)
3196 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]);
3197 if (tf->protocol == ATA_PROT_UNKNOWN) {
3202 if ((cdb[2 + cdb_offset] & 0x3) == 0) {
3204 * When T_LENGTH is zero (No data is transferred), dir should
3207 if (scmd->sc_data_direction != DMA_NONE) {
3208 fp = 2 + cdb_offset;
3212 if (ata_is_ncq(tf->protocol))
3213 tf->protocol = ATA_PROT_NCQ_NODATA;
3217 tf->flags |= ATA_TFLAG_LBA;
3220 * 12 and 16 byte CDBs use different offsets to
3221 * provide the various register values.
3223 if (cdb[0] == ATA_16) {
3225 * 16-byte CDB - may contain extended commands.
3227 * If that is the case, copy the upper byte register values.
3229 if (cdb[1] & 0x01) {
3230 tf->hob_feature = cdb[3];
3231 tf->hob_nsect = cdb[5];
3232 tf->hob_lbal = cdb[7];
3233 tf->hob_lbam = cdb[9];
3234 tf->hob_lbah = cdb[11];
3235 tf->flags |= ATA_TFLAG_LBA48;
3237 tf->flags &= ~ATA_TFLAG_LBA48;
3240 * Always copy low byte, device and command registers.
3242 tf->feature = cdb[4];
3247 tf->device = cdb[13];
3248 tf->command = cdb[14];
3249 } else if (cdb[0] == ATA_12) {
3251 * 12-byte CDB - incapable of extended commands.
3253 tf->flags &= ~ATA_TFLAG_LBA48;
3255 tf->feature = cdb[3];
3260 tf->device = cdb[8];
3261 tf->command = cdb[9];
3264 * 32-byte CDB - may contain extended command fields.
3266 * If that is the case, copy the upper byte register values.
3268 if (cdb[10] & 0x01) {
3269 tf->hob_feature = cdb[20];
3270 tf->hob_nsect = cdb[22];
3271 tf->hob_lbal = cdb[16];
3272 tf->hob_lbam = cdb[15];
3273 tf->hob_lbah = cdb[14];
3274 tf->flags |= ATA_TFLAG_LBA48;
3276 tf->flags &= ~ATA_TFLAG_LBA48;
3278 tf->feature = cdb[21];
3279 tf->nsect = cdb[23];
3283 tf->device = cdb[24];
3284 tf->command = cdb[25];
3285 tf->auxiliary = get_unaligned_be32(&cdb[28]);
3288 /* For NCQ commands copy the tag value */
3289 if (ata_is_ncq(tf->protocol))
3290 tf->nsect = qc->hw_tag << 3;
3292 /* enforce correct master/slave bit */
3293 tf->device = dev->devno ?
3294 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
3296 switch (tf->command) {
3297 /* READ/WRITE LONG use a non-standard sect_size */
3298 case ATA_CMD_READ_LONG:
3299 case ATA_CMD_READ_LONG_ONCE:
3300 case ATA_CMD_WRITE_LONG:
3301 case ATA_CMD_WRITE_LONG_ONCE:
3302 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) {
3306 qc->sect_size = scsi_bufflen(scmd);
3309 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3310 case ATA_CMD_CFA_WRITE_NE:
3311 case ATA_CMD_CFA_TRANS_SECT:
3312 case ATA_CMD_CFA_WRITE_MULT_NE:
3313 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3315 case ATA_CMD_READ_EXT:
3316 case ATA_CMD_READ_QUEUED:
3317 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3318 case ATA_CMD_FPDMA_READ:
3319 case ATA_CMD_READ_MULTI:
3320 case ATA_CMD_READ_MULTI_EXT:
3321 case ATA_CMD_PIO_READ:
3322 case ATA_CMD_PIO_READ_EXT:
3323 case ATA_CMD_READ_STREAM_DMA_EXT:
3324 case ATA_CMD_READ_STREAM_EXT:
3325 case ATA_CMD_VERIFY:
3326 case ATA_CMD_VERIFY_EXT:
3328 case ATA_CMD_WRITE_EXT:
3329 case ATA_CMD_WRITE_FUA_EXT:
3330 case ATA_CMD_WRITE_QUEUED:
3331 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
3332 case ATA_CMD_FPDMA_WRITE:
3333 case ATA_CMD_WRITE_MULTI:
3334 case ATA_CMD_WRITE_MULTI_EXT:
3335 case ATA_CMD_WRITE_MULTI_FUA_EXT:
3336 case ATA_CMD_PIO_WRITE:
3337 case ATA_CMD_PIO_WRITE_EXT:
3338 case ATA_CMD_WRITE_STREAM_DMA_EXT:
3339 case ATA_CMD_WRITE_STREAM_EXT:
3340 qc->sect_size = scmd->device->sector_size;
3343 /* Everything else uses 512 byte "sectors" */
3345 qc->sect_size = ATA_SECT_SIZE;
3349 * Set flags so that all registers will be written, pass on
3350 * write indication (used for PIO/DMA setup), result TF is
3351 * copied back and we don't whine too much about its failure.
3353 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3354 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3355 tf->flags |= ATA_TFLAG_WRITE;
3357 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3360 * Set transfer length.
3362 * TODO: find out if we need to do more here to
3363 * cover scatter/gather case.
3365 ata_qc_set_pc_nbytes(qc);
3367 /* We may not issue DMA commands if no DMA mode is set */
3368 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) {
3373 /* We may not issue NCQ commands to devices not supporting NCQ */
3374 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) {
3379 /* sanity check for pio multi commands */
3380 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) {
3385 if (is_multi_taskfile(tf)) {
3386 unsigned int multi_count = 1 << (cdb[1] >> 5);
3388 /* compare the passed through multi_count
3389 * with the cached multi_count of libata
3391 if (multi_count != dev->multi_count)
3392 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3397 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3398 * SET_FEATURES - XFER MODE must be preceded/succeeded
3399 * by an update to hardware-specific registers for each
3400 * controller (i.e. the reason for ->set_piomode(),
3401 * ->set_dmamode(), and ->post_set_mode() hooks).
3403 if (tf->command == ATA_CMD_SET_FEATURES &&
3404 tf->feature == SETFEATURES_XFER) {
3405 fp = (cdb[0] == ATA_16) ? 4 : 3;
3410 * Filter TPM commands by default. These provide an
3411 * essentially uncontrolled encrypted "back door" between
3412 * applications and the disk. Set libata.allow_tpm=1 if you
3413 * have a real reason for wanting to use them. This ensures
3414 * that installed software cannot easily mess stuff up without
3415 * user intent. DVR type users will probably ship with this enabled
3416 * for movie content management.
3418 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3419 * for this and should do in future but that it is not sufficient as
3420 * DCS is an optional feature set. Thus we also do the software filter
3421 * so that we comply with the TC consortium stated goal that the user
3422 * can turn off TC features of their system.
3424 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) {
3425 fp = (cdb[0] == ATA_16) ? 14 : 9;
3432 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff);
3437 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim
3438 * @cmd: SCSI command being translated
3439 * @trmax: Maximum number of entries that will fit in sector_size bytes.
3440 * @sector: Starting sector
3441 * @count: Total Range of request in logical sectors
3443 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted
3446 * Upto 64 entries of the format:
3447 * 63:48 Range Length
3450 * Range Length of 0 is ignored.
3451 * LBA's should be sorted order and not overlap.
3453 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET
3455 * Return: Number of bytes copied into sglist.
3457 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax,
3458 u64 sector, u32 count)
3460 struct scsi_device *sdp = cmd->device;
3461 size_t len = sdp->sector_size;
3465 unsigned long flags;
3467 WARN_ON(len > ATA_SCSI_RBUF_SIZE);
3469 if (len > ATA_SCSI_RBUF_SIZE)
3470 len = ATA_SCSI_RBUF_SIZE;
3472 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
3473 buf = ((void *)ata_scsi_rbuf);
3474 memset(buf, 0, len);
3476 u64 entry = sector |
3477 ((u64)(count > 0xffff ? 0xffff : count) << 48);
3478 buf[i++] = __cpu_to_le64(entry);
3479 if (count <= 0xffff)
3484 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len);
3485 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
3491 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same
3492 * @qc: Command to be translated
3494 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or
3495 * an SCT Write Same command.
3496 * Based on WRITE SAME has the UNMAP flag:
3498 * - When set translate to DSM TRIM
3499 * - When clear translate to SCT Write Same
3501 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3503 struct ata_taskfile *tf = &qc->tf;
3504 struct scsi_cmnd *scmd = qc->scsicmd;
3505 struct scsi_device *sdp = scmd->device;
3506 size_t len = sdp->sector_size;
3507 struct ata_device *dev = qc->dev;
3508 const u8 *cdb = scmd->cmnd;
3511 const u32 trmax = len >> 3;
3515 u8 unmap = cdb[1] & 0x8;
3517 /* we may not issue DMA commands if no DMA mode is set */
3518 if (unlikely(!dev->dma_mode))
3519 goto invalid_opcode;
3522 * We only allow sending this command through the block layer,
3523 * as it modifies the DATA OUT buffer, which would corrupt user
3524 * memory for SG_IO commands.
3526 if (unlikely(blk_rq_is_passthrough(scmd->request)))
3527 goto invalid_opcode;
3529 if (unlikely(scmd->cmd_len < 16)) {
3533 scsi_16_lba_len(cdb, &block, &n_block);
3536 (dev->horkage & ATA_HORKAGE_NOTRIM) ||
3537 !ata_id_has_trim(dev->id)) {
3542 /* If the request is too large the cmd is invalid */
3543 if (n_block > 0xffff * trmax) {
3549 * WRITE SAME always has a sector sized buffer as payload, this
3550 * should never be a multiple entry S/G list.
3552 if (!scsi_sg_count(scmd))
3553 goto invalid_param_len;
3556 * size must match sector size in bytes
3557 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count)
3558 * is defined as number of 512 byte blocks to be transferred.
3561 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block);
3563 goto invalid_param_len;
3565 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3566 /* Newer devices support queued TRIM commands */
3567 tf->protocol = ATA_PROT_NCQ;
3568 tf->command = ATA_CMD_FPDMA_SEND;
3569 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3570 tf->nsect = qc->hw_tag << 3;
3571 tf->hob_feature = (size / 512) >> 8;
3572 tf->feature = size / 512;
3576 tf->protocol = ATA_PROT_DMA;
3577 tf->hob_feature = 0;
3578 tf->feature = ATA_DSM_TRIM;
3579 tf->hob_nsect = (size / 512) >> 8;
3580 tf->nsect = size / 512;
3581 tf->command = ATA_CMD_DSM;
3584 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3587 ata_qc_set_pc_nbytes(qc);
3592 ata_scsi_set_invalid_field(dev, scmd, fp, bp);
3595 /* "Parameter list length error" */
3596 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3599 /* "Invalid command operation code" */
3600 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0);
3605 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN
3606 * @args: device MAINTENANCE_IN data / SCSI command of interest.
3607 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
3609 * Yields a subset to satisfy scsi_report_opcode()
3612 * spin_lock_irqsave(host lock)
3614 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf)
3616 struct ata_device *dev = args->dev;
3617 u8 *cdb = args->cmd->cmnd;
3619 unsigned int err = 0;
3622 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]);
3631 case SERVICE_ACTION_IN_16:
3634 case SYNCHRONIZE_CACHE:
3638 case TEST_UNIT_READY:
3639 case SEND_DIAGNOSTIC:
3640 case MAINTENANCE_IN:
3652 case MODE_SELECT_10:
3658 if (ata_id_zoned_cap(dev->id) ||
3659 dev->class == ATA_DEV_ZAC)
3662 case SECURITY_PROTOCOL_IN:
3663 case SECURITY_PROTOCOL_OUT:
3664 if (dev->flags & ATA_DFLAG_TRUSTED)
3671 rbuf[1] = supported; /* supported */
3676 * ata_scsi_report_zones_complete - convert ATA output
3677 * @qc: command structure returning the data
3679 * Convert T-13 little-endian field representation into
3680 * T-10 big-endian field representation.
3683 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc)
3685 struct scsi_cmnd *scmd = qc->scsicmd;
3686 struct sg_mapping_iter miter;
3687 unsigned long flags;
3688 unsigned int bytes = 0;
3690 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd),
3691 SG_MITER_TO_SG | SG_MITER_ATOMIC);
3693 local_irq_save(flags);
3694 while (sg_miter_next(&miter)) {
3695 unsigned int offset = 0;
3700 u64 max_lba, opt_lba;
3703 /* Swizzle header */
3705 list_length = get_unaligned_le32(&hdr[0]);
3706 same = get_unaligned_le16(&hdr[4]);
3707 max_lba = get_unaligned_le64(&hdr[8]);
3708 opt_lba = get_unaligned_le64(&hdr[16]);
3709 put_unaligned_be32(list_length, &hdr[0]);
3710 hdr[4] = same & 0xf;
3711 put_unaligned_be64(max_lba, &hdr[8]);
3712 put_unaligned_be64(opt_lba, &hdr[16]);
3716 while (offset < miter.length) {
3718 u8 cond, type, non_seq, reset;
3719 u64 size, start, wp;
3721 /* Swizzle zone descriptor */
3722 rec = miter.addr + offset;
3723 type = rec[0] & 0xf;
3724 cond = (rec[1] >> 4) & 0xf;
3725 non_seq = (rec[1] & 2);
3726 reset = (rec[1] & 1);
3727 size = get_unaligned_le64(&rec[8]);
3728 start = get_unaligned_le64(&rec[16]);
3729 wp = get_unaligned_le64(&rec[24]);
3731 rec[1] = (cond << 4) | non_seq | reset;
3732 put_unaligned_be64(size, &rec[8]);
3733 put_unaligned_be64(start, &rec[16]);
3734 put_unaligned_be64(wp, &rec[24]);
3735 WARN_ON(offset + 64 > miter.length);
3740 sg_miter_stop(&miter);
3741 local_irq_restore(flags);
3743 ata_scsi_qc_complete(qc);
3746 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc)
3748 struct ata_taskfile *tf = &qc->tf;
3749 struct scsi_cmnd *scmd = qc->scsicmd;
3750 const u8 *cdb = scmd->cmnd;
3751 u16 sect, fp = (u16)-1;
3752 u8 sa, options, bp = 0xff;
3756 if (unlikely(scmd->cmd_len < 16)) {
3757 ata_dev_warn(qc->dev, "invalid cdb length %d\n",
3762 scsi_16_lba_len(cdb, &block, &n_block);
3763 if (n_block != scsi_bufflen(scmd)) {
3764 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n",
3765 n_block, scsi_bufflen(scmd));
3766 goto invalid_param_len;
3769 if (sa != ZI_REPORT_ZONES) {
3770 ata_dev_warn(qc->dev, "invalid service action %d\n", sa);
3775 * ZAC allows only for transfers in 512 byte blocks,
3776 * and uses a 16 bit value for the transfer count.
3778 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) {
3779 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block);
3780 goto invalid_param_len;
3782 sect = n_block / 512;
3783 options = cdb[14] & 0xbf;
3785 if (ata_ncq_enabled(qc->dev) &&
3786 ata_fpdma_zac_mgmt_in_supported(qc->dev)) {
3787 tf->protocol = ATA_PROT_NCQ;
3788 tf->command = ATA_CMD_FPDMA_RECV;
3789 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f;
3790 tf->nsect = qc->hw_tag << 3;
3791 tf->feature = sect & 0xff;
3792 tf->hob_feature = (sect >> 8) & 0xff;
3793 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8);
3795 tf->command = ATA_CMD_ZAC_MGMT_IN;
3796 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES;
3797 tf->protocol = ATA_PROT_DMA;
3798 tf->hob_feature = options;
3799 tf->hob_nsect = (sect >> 8) & 0xff;
3800 tf->nsect = sect & 0xff;
3802 tf->device = ATA_LBA;
3803 tf->lbah = (block >> 16) & 0xff;
3804 tf->lbam = (block >> 8) & 0xff;
3805 tf->lbal = block & 0xff;
3806 tf->hob_lbah = (block >> 40) & 0xff;
3807 tf->hob_lbam = (block >> 32) & 0xff;
3808 tf->hob_lbal = (block >> 24) & 0xff;
3810 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3811 qc->flags |= ATA_QCFLAG_RESULT_TF;
3813 ata_qc_set_pc_nbytes(qc);
3815 qc->complete_fn = ata_scsi_report_zones_complete;
3820 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
3824 /* "Parameter list length error" */
3825 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3829 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc)
3831 struct ata_taskfile *tf = &qc->tf;
3832 struct scsi_cmnd *scmd = qc->scsicmd;
3833 struct ata_device *dev = qc->dev;
3834 const u8 *cdb = scmd->cmnd;
3840 if (unlikely(scmd->cmd_len < 16)) {
3846 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) &&
3847 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) {
3852 scsi_16_lba_len(cdb, &block, &n_block);
3855 * ZAC MANAGEMENT OUT doesn't define any length
3857 goto invalid_param_len;
3860 all = cdb[14] & 0x1;
3863 * Ignore the block address (zone ID) as defined by ZBC.
3866 } else if (block >= dev->n_sectors) {
3868 * Block must be a valid zone ID (a zone start LBA).
3874 if (ata_ncq_enabled(qc->dev) &&
3875 ata_fpdma_zac_mgmt_out_supported(qc->dev)) {
3876 tf->protocol = ATA_PROT_NCQ_NODATA;
3877 tf->command = ATA_CMD_NCQ_NON_DATA;
3878 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT;
3879 tf->nsect = qc->hw_tag << 3;
3880 tf->auxiliary = sa | ((u16)all << 8);
3882 tf->protocol = ATA_PROT_NODATA;
3883 tf->command = ATA_CMD_ZAC_MGMT_OUT;
3885 tf->hob_feature = all;
3887 tf->lbah = (block >> 16) & 0xff;
3888 tf->lbam = (block >> 8) & 0xff;
3889 tf->lbal = block & 0xff;
3890 tf->hob_lbah = (block >> 40) & 0xff;
3891 tf->hob_lbam = (block >> 32) & 0xff;
3892 tf->hob_lbal = (block >> 24) & 0xff;
3893 tf->device = ATA_LBA;
3894 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3899 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
3902 /* "Parameter list length error" */
3903 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3908 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3909 * @qc: Storage for translated ATA taskfile
3910 * @buf: input buffer
3911 * @len: number of valid bytes in the input buffer
3912 * @fp: out parameter for the failed field on error
3914 * Prepare a taskfile to modify caching information for the device.
3919 static int ata_mselect_caching(struct ata_queued_cmd *qc,
3920 const u8 *buf, int len, u16 *fp)
3922 struct ata_taskfile *tf = &qc->tf;
3923 struct ata_device *dev = qc->dev;
3924 u8 mpage[CACHE_MPAGE_LEN];
3929 * The first two bytes of def_cache_mpage are a header, so offsets
3930 * in mpage are off by 2 compared to buf. Same for len.
3933 if (len != CACHE_MPAGE_LEN - 2) {
3934 if (len < CACHE_MPAGE_LEN - 2)
3937 *fp = CACHE_MPAGE_LEN - 2;
3941 wce = buf[0] & (1 << 2);
3944 * Check that read-only bits are not modified.
3946 ata_msense_caching(dev->id, mpage, false);
3947 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) {
3950 if (mpage[i + 2] != buf[i]) {
3956 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3957 tf->protocol = ATA_PROT_NODATA;
3959 tf->command = ATA_CMD_SET_FEATURES;
3960 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3965 * ata_mselect_control - Simulate MODE SELECT for control page
3966 * @qc: Storage for translated ATA taskfile
3967 * @buf: input buffer
3968 * @len: number of valid bytes in the input buffer
3969 * @fp: out parameter for the failed field on error
3971 * Prepare a taskfile to modify caching information for the device.
3976 static int ata_mselect_control(struct ata_queued_cmd *qc,
3977 const u8 *buf, int len, u16 *fp)
3979 struct ata_device *dev = qc->dev;
3980 u8 mpage[CONTROL_MPAGE_LEN];
3985 * The first two bytes of def_control_mpage are a header, so offsets
3986 * in mpage are off by 2 compared to buf. Same for len.
3989 if (len != CONTROL_MPAGE_LEN - 2) {
3990 if (len < CONTROL_MPAGE_LEN - 2)
3993 *fp = CONTROL_MPAGE_LEN - 2;
3997 d_sense = buf[0] & (1 << 2);
4000 * Check that read-only bits are not modified.
4002 ata_msense_control(dev, mpage, false);
4003 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) {
4006 if (mpage[2 + i] != buf[i]) {
4011 if (d_sense & (1 << 2))
4012 dev->flags |= ATA_DFLAG_D_SENSE;
4014 dev->flags &= ~ATA_DFLAG_D_SENSE;
4019 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands
4020 * @qc: Storage for translated ATA taskfile
4022 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
4023 * Assume this is invoked for direct access devices (e.g. disks) only.
4024 * There should be no block descriptor for other device types.
4027 * spin_lock_irqsave(host lock)
4029 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
4031 struct scsi_cmnd *scmd = qc->scsicmd;
4032 const u8 *cdb = scmd->cmnd;
4034 unsigned six_byte, pg_len, hdr_len, bd_len;
4039 const u8 *p = buffer;
4043 six_byte = (cdb[0] == MODE_SELECT);
4045 if (scmd->cmd_len < 5) {
4053 if (scmd->cmd_len < 9) {
4058 len = (cdb[7] << 8) + cdb[8];
4062 /* We only support PF=1, SP=0. */
4063 if ((cdb[1] & 0x11) != 0x10) {
4065 bp = (cdb[1] & 0x01) ? 1 : 5;
4069 /* Test early for possible overrun. */
4070 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
4071 goto invalid_param_len;
4073 /* Move past header and block descriptors. */
4075 goto invalid_param_len;
4077 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd),
4078 buffer, sizeof(buffer)))
4079 goto invalid_param_len;
4084 bd_len = (p[6] << 8) + p[7];
4089 goto invalid_param_len;
4090 if (bd_len != 0 && bd_len != 8) {
4091 fp = (six_byte) ? 3 : 6;
4092 fp += bd_len + hdr_len;
4101 /* Parse both possible formats for the mode page headers. */
4105 goto invalid_param_len;
4108 pg_len = (p[2] << 8) | p[3];
4113 goto invalid_param_len;
4122 * No mode subpages supported (yet) but asking for _all_
4123 * subpages may be valid
4125 if (spg && (spg != ALL_SUB_MPAGES)) {
4126 fp = (p[0] & 0x40) ? 1 : 0;
4127 fp += hdr_len + bd_len;
4131 goto invalid_param_len;
4135 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) {
4136 fp += hdr_len + bd_len;
4141 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) {
4142 fp += hdr_len + bd_len;
4145 goto skip; /* No ATA command to send */
4148 default: /* invalid page code */
4149 fp = bd_len + hdr_len;
4154 * Only one page has changeable data, so we only support setting one
4163 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
4167 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp);
4171 /* "Parameter list length error" */
4172 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
4176 scmd->result = SAM_STAT_GOOD;
4180 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma)
4183 return ATA_CMD_TRUSTED_NONDATA;
4185 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND;
4187 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV;
4190 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc)
4192 struct scsi_cmnd *scmd = qc->scsicmd;
4193 const u8 *cdb = scmd->cmnd;
4194 struct ata_taskfile *tf = &qc->tf;
4196 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT);
4197 u16 spsp = get_unaligned_be16(&cdb[2]);
4198 u32 len = get_unaligned_be32(&cdb[6]);
4199 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO);
4202 * We don't support the ATA "security" protocol.
4205 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0);
4209 if (cdb[4] & 7) { /* INC_512 */
4211 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0);
4215 if (len > 0x01fffe00) {
4216 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0);
4220 /* convert to the sector-based ATA addressing */
4221 len = (len + 511) / 512;
4224 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO;
4225 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA;
4227 tf->flags |= ATA_TFLAG_WRITE;
4228 tf->command = ata_scsi_trusted_op(len, send, dma);
4230 tf->lbam = spsp & 0xff;
4231 tf->lbah = spsp >> 8;
4234 tf->nsect = len & 0xff;
4235 tf->lbal = len >> 8;
4238 tf->lbah = (1 << 7);
4241 ata_qc_set_pc_nbytes(qc);
4246 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler
4247 * @qc: Command to be translated
4249 * Translate a SCSI variable length CDB to specified commands.
4250 * It checks a service action value in CDB to call corresponding handler.
4253 * Zero on success, non-zero on failure
4256 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc)
4258 struct scsi_cmnd *scmd = qc->scsicmd;
4259 const u8 *cdb = scmd->cmnd;
4260 const u16 sa = get_unaligned_be16(&cdb[8]);
4263 * if service action represents a ata pass-thru(32) command,
4264 * then pass it to ata_scsi_pass_thru handler.
4267 return ata_scsi_pass_thru(qc);
4269 /* unsupported service action */
4274 * ata_get_xlat_func - check if SCSI to ATA translation is possible
4276 * @cmd: SCSI command opcode to consider
4278 * Look up the SCSI command given, and determine whether the
4279 * SCSI command is to be translated or simulated.
4282 * Pointer to translation function if possible, %NULL if not.
4285 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
4295 return ata_scsi_rw_xlat;
4298 return ata_scsi_write_same_xlat;
4300 case SYNCHRONIZE_CACHE:
4301 if (ata_try_flush_cache(dev))
4302 return ata_scsi_flush_xlat;
4307 return ata_scsi_verify_xlat;
4311 return ata_scsi_pass_thru;
4313 case VARIABLE_LENGTH_CMD:
4314 return ata_scsi_var_len_cdb_xlat;
4317 case MODE_SELECT_10:
4318 return ata_scsi_mode_select_xlat;
4322 return ata_scsi_zbc_in_xlat;
4325 return ata_scsi_zbc_out_xlat;
4327 case SECURITY_PROTOCOL_IN:
4328 case SECURITY_PROTOCOL_OUT:
4329 if (!(dev->flags & ATA_DFLAG_TRUSTED))
4331 return ata_scsi_security_inout_xlat;
4334 return ata_scsi_start_stop_xlat;
4341 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
4342 * @ap: ATA port to which the command was being sent
4343 * @cmd: SCSI command to dump
4345 * Prints the contents of a SCSI command via printk().
4348 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
4349 struct scsi_cmnd *cmd)
4351 #ifdef ATA_VERBOSE_DEBUG
4352 struct scsi_device *scsidev = cmd->device;
4354 VPRINTK("CDB (%u:%d,%d,%lld) %9ph\n",
4356 scsidev->channel, scsidev->id, scsidev->lun,
4361 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
4362 struct ata_device *dev)
4364 u8 scsi_op = scmd->cmnd[0];
4365 ata_xlat_func_t xlat_func;
4368 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
4369 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
4372 xlat_func = ata_get_xlat_func(dev, scsi_op);
4374 if (unlikely(!scmd->cmd_len))
4378 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
4379 /* relay SCSI command to ATAPI device */
4380 int len = COMMAND_SIZE(scsi_op);
4381 if (unlikely(len > scmd->cmd_len ||
4382 len > dev->cdb_len ||
4383 scmd->cmd_len > ATAPI_CDB_LEN))
4386 xlat_func = atapi_xlat;
4388 /* ATA_16 passthru, treat as an ATA command */
4389 if (unlikely(scmd->cmd_len > 16))
4392 xlat_func = ata_get_xlat_func(dev, scsi_op);
4397 rc = ata_scsi_translate(dev, scmd, xlat_func);
4399 ata_scsi_simulate(dev, scmd);
4404 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
4405 scmd->cmd_len, scsi_op, dev->cdb_len);
4406 scmd->result = DID_ERROR << 16;
4407 scmd->scsi_done(scmd);
4412 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
4413 * @shost: SCSI host of command to be sent
4414 * @cmd: SCSI command to be sent
4416 * In some cases, this function translates SCSI commands into
4417 * ATA taskfiles, and queues the taskfiles to be sent to
4418 * hardware. In other cases, this function simulates a
4419 * SCSI device by evaluating and responding to certain
4420 * SCSI commands. This creates the overall effect of
4421 * ATA and ATAPI devices appearing as SCSI devices.
4427 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4430 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
4432 struct ata_port *ap;
4433 struct ata_device *dev;
4434 struct scsi_device *scsidev = cmd->device;
4436 unsigned long irq_flags;
4438 ap = ata_shost_to_port(shost);
4440 spin_lock_irqsave(ap->lock, irq_flags);
4442 ata_scsi_dump_cdb(ap, cmd);
4444 dev = ata_scsi_find_dev(ap, scsidev);
4446 rc = __ata_scsi_queuecmd(cmd, dev);
4448 cmd->result = (DID_BAD_TARGET << 16);
4449 cmd->scsi_done(cmd);
4452 spin_unlock_irqrestore(ap->lock, irq_flags);
4458 * ata_scsi_simulate - simulate SCSI command on ATA device
4459 * @dev: the target device
4460 * @cmd: SCSI command being sent to device.
4462 * Interprets and directly executes a select list of SCSI commands
4463 * that can be handled internally.
4466 * spin_lock_irqsave(host lock)
4469 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
4471 struct ata_scsi_args args;
4472 const u8 *scsicmd = cmd->cmnd;
4479 switch(scsicmd[0]) {
4481 if (scsicmd[1] & 2) /* is CmdDt set? */
4482 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4483 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
4484 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
4485 else switch (scsicmd[2]) {
4487 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
4490 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
4493 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
4496 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
4499 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
4502 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
4505 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
4508 if (dev->flags & ATA_DFLAG_ZAC) {
4509 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6);
4514 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
4521 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
4525 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4528 case SERVICE_ACTION_IN_16:
4529 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
4530 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4532 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4536 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
4540 ata_scsi_set_sense(dev, cmd, 0, 0, 0);
4541 cmd->result = (DRIVER_SENSE << 24);
4544 /* if we reach this, then writeback caching is disabled,
4545 * turning this into a no-op.
4547 case SYNCHRONIZE_CACHE:
4550 /* no-op's, complete with success */
4554 case TEST_UNIT_READY:
4557 case SEND_DIAGNOSTIC:
4558 tmp8 = scsicmd[1] & ~(1 << 3);
4559 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4])
4560 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4563 case MAINTENANCE_IN:
4564 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES)
4565 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in);
4567 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4570 /* all other commands */
4572 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0);
4573 /* "Invalid command operation code" */
4577 cmd->scsi_done(cmd);
4580 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
4584 for (i = 0; i < host->n_ports; i++) {
4585 struct ata_port *ap = host->ports[i];
4586 struct Scsi_Host *shost;
4589 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
4593 shost->eh_noresume = 1;
4594 *(struct ata_port **)&shost->hostdata[0] = ap;
4595 ap->scsi_host = shost;
4597 shost->transportt = ata_scsi_transport_template;
4598 shost->unique_id = ap->print_id;
4601 shost->max_channel = 1;
4602 shost->max_cmd_len = 32;
4604 /* Schedule policy is determined by ->qc_defer()
4605 * callback and it needs to see every deferred qc.
4606 * Set host_blocked to 1 to prevent SCSI midlayer from
4607 * automatically deferring requests.
4609 shost->max_host_blocked = 1;
4611 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev);
4620 struct Scsi_Host *shost = host->ports[i]->scsi_host;
4622 /* scsi_host_put() is in ata_devres_release() */
4623 scsi_remove_host(shost);
4628 void ata_scsi_scan_host(struct ata_port *ap, int sync)
4631 struct ata_device *last_failed_dev = NULL;
4632 struct ata_link *link;
4633 struct ata_device *dev;
4636 ata_for_each_link(link, ap, EDGE) {
4637 ata_for_each_dev(dev, link, ENABLED) {
4638 struct scsi_device *sdev;
4639 int channel = 0, id = 0;
4644 if (ata_is_host_link(link))
4647 channel = link->pmp;
4649 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
4651 if (!IS_ERR(sdev)) {
4653 scsi_device_put(sdev);
4660 /* If we scanned while EH was in progress or allocation
4661 * failure occurred, scan would have failed silently. Check
4662 * whether all devices are attached.
4664 ata_for_each_link(link, ap, EDGE) {
4665 ata_for_each_dev(dev, link, ENABLED) {
4674 /* we're missing some SCSI devices */
4676 /* If caller requested synchrnous scan && we've made
4677 * any progress, sleep briefly and repeat.
4679 if (dev != last_failed_dev) {
4681 last_failed_dev = dev;
4685 /* We might be failing to detect boot device, give it
4686 * a few more chances.
4694 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
4697 queue_delayed_work(system_long_wq, &ap->hotplug_task,
4698 round_jiffies_relative(HZ));
4702 * ata_scsi_offline_dev - offline attached SCSI device
4703 * @dev: ATA device to offline attached SCSI device for
4705 * This function is called from ata_eh_hotplug() and responsible
4706 * for taking the SCSI device attached to @dev offline. This
4707 * function is called with host lock which protects dev->sdev
4711 * spin_lock_irqsave(host lock)
4714 * 1 if attached SCSI device exists, 0 otherwise.
4716 int ata_scsi_offline_dev(struct ata_device *dev)
4719 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
4726 * ata_scsi_remove_dev - remove attached SCSI device
4727 * @dev: ATA device to remove attached SCSI device for
4729 * This function is called from ata_eh_scsi_hotplug() and
4730 * responsible for removing the SCSI device attached to @dev.
4733 * Kernel thread context (may sleep).
4735 static void ata_scsi_remove_dev(struct ata_device *dev)
4737 struct ata_port *ap = dev->link->ap;
4738 struct scsi_device *sdev;
4739 unsigned long flags;
4741 /* Alas, we need to grab scan_mutex to ensure SCSI device
4742 * state doesn't change underneath us and thus
4743 * scsi_device_get() always succeeds. The mutex locking can
4744 * be removed if there is __scsi_device_get() interface which
4745 * increments reference counts regardless of device state.
4747 mutex_lock(&ap->scsi_host->scan_mutex);
4748 spin_lock_irqsave(ap->lock, flags);
4750 /* clearing dev->sdev is protected by host lock */
4755 /* If user initiated unplug races with us, sdev can go
4756 * away underneath us after the host lock and
4757 * scan_mutex are released. Hold onto it.
4759 if (scsi_device_get(sdev) == 0) {
4760 /* The following ensures the attached sdev is
4761 * offline on return from ata_scsi_offline_dev()
4762 * regardless it wins or loses the race
4763 * against this function.
4765 scsi_device_set_state(sdev, SDEV_OFFLINE);
4772 spin_unlock_irqrestore(ap->lock, flags);
4773 mutex_unlock(&ap->scsi_host->scan_mutex);
4776 ata_dev_info(dev, "detaching (SCSI %s)\n",
4777 dev_name(&sdev->sdev_gendev));
4779 scsi_remove_device(sdev);
4780 scsi_device_put(sdev);
4784 static void ata_scsi_handle_link_detach(struct ata_link *link)
4786 struct ata_port *ap = link->ap;
4787 struct ata_device *dev;
4789 ata_for_each_dev(dev, link, ALL) {
4790 unsigned long flags;
4792 if (!(dev->flags & ATA_DFLAG_DETACHED))
4795 spin_lock_irqsave(ap->lock, flags);
4796 dev->flags &= ~ATA_DFLAG_DETACHED;
4797 spin_unlock_irqrestore(ap->lock, flags);
4799 if (zpodd_dev_enabled(dev))
4802 ata_scsi_remove_dev(dev);
4807 * ata_scsi_media_change_notify - send media change event
4808 * @dev: Pointer to the disk device with media change event
4810 * Tell the block layer to send a media change notification
4814 * spin_lock_irqsave(host lock)
4816 void ata_scsi_media_change_notify(struct ata_device *dev)
4819 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
4824 * ata_scsi_hotplug - SCSI part of hotplug
4825 * @work: Pointer to ATA port to perform SCSI hotplug on
4827 * Perform SCSI part of hotplug. It's executed from a separate
4828 * workqueue after EH completes. This is necessary because SCSI
4829 * hot plugging requires working EH and hot unplugging is
4830 * synchronized with hot plugging with a mutex.
4833 * Kernel thread context (may sleep).
4835 void ata_scsi_hotplug(struct work_struct *work)
4837 struct ata_port *ap =
4838 container_of(work, struct ata_port, hotplug_task.work);
4841 if (ap->pflags & ATA_PFLAG_UNLOADING) {
4842 DPRINTK("ENTER/EXIT - unloading\n");
4849 * The block layer suspend/resume path is fundamentally broken due
4850 * to freezable kthreads and workqueue and may deadlock if a block
4851 * device gets removed while resume is in progress. I don't know
4852 * what the solution is short of removing freezable kthreads and
4853 * workqueues altogether.
4855 * The following is an ugly hack to avoid kicking off device
4856 * removal while freezer is active. This is a joke but does avoid
4857 * this particular deadlock scenario.
4859 * https://bugzilla.kernel.org/show_bug.cgi?id=62801
4860 * http://marc.info/?l=linux-kernel&m=138695698516487
4862 #ifdef CONFIG_FREEZER
4868 mutex_lock(&ap->scsi_scan_mutex);
4870 /* Unplug detached devices. We cannot use link iterator here
4871 * because PMP links have to be scanned even if PMP is
4872 * currently not attached. Iterate manually.
4874 ata_scsi_handle_link_detach(&ap->link);
4876 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
4877 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
4879 /* scan for new ones */
4880 ata_scsi_scan_host(ap, 0);
4882 mutex_unlock(&ap->scsi_scan_mutex);
4887 * ata_scsi_user_scan - indication for user-initiated bus scan
4888 * @shost: SCSI host to scan
4889 * @channel: Channel to scan
4893 * This function is called when user explicitly requests bus
4894 * scan. Set probe pending flag and invoke EH.
4897 * SCSI layer (we don't care)
4902 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
4903 unsigned int id, u64 lun)
4905 struct ata_port *ap = ata_shost_to_port(shost);
4906 unsigned long flags;
4909 if (!ap->ops->error_handler)
4912 if (lun != SCAN_WILD_CARD && lun)
4915 if (!sata_pmp_attached(ap)) {
4916 if (channel != SCAN_WILD_CARD && channel)
4920 if (id != SCAN_WILD_CARD && id)
4925 spin_lock_irqsave(ap->lock, flags);
4927 if (devno == SCAN_WILD_CARD) {
4928 struct ata_link *link;
4930 ata_for_each_link(link, ap, EDGE) {
4931 struct ata_eh_info *ehi = &link->eh_info;
4932 ehi->probe_mask |= ATA_ALL_DEVICES;
4933 ehi->action |= ATA_EH_RESET;
4936 struct ata_device *dev = ata_find_dev(ap, devno);
4939 struct ata_eh_info *ehi = &dev->link->eh_info;
4940 ehi->probe_mask |= 1 << dev->devno;
4941 ehi->action |= ATA_EH_RESET;
4947 ata_port_schedule_eh(ap);
4948 spin_unlock_irqrestore(ap->lock, flags);
4949 ata_port_wait_eh(ap);
4951 spin_unlock_irqrestore(ap->lock, flags);
4957 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4958 * @work: Pointer to ATA port to perform scsi_rescan_device()
4960 * After ATA pass thru (SAT) commands are executed successfully,
4961 * libata need to propagate the changes to SCSI layer.
4964 * Kernel thread context (may sleep).
4966 void ata_scsi_dev_rescan(struct work_struct *work)
4968 struct ata_port *ap =
4969 container_of(work, struct ata_port, scsi_rescan_task);
4970 struct ata_link *link;
4971 struct ata_device *dev;
4972 unsigned long flags;
4974 mutex_lock(&ap->scsi_scan_mutex);
4975 spin_lock_irqsave(ap->lock, flags);
4977 ata_for_each_link(link, ap, EDGE) {
4978 ata_for_each_dev(dev, link, ENABLED) {
4979 struct scsi_device *sdev = dev->sdev;
4983 if (scsi_device_get(sdev))
4986 spin_unlock_irqrestore(ap->lock, flags);
4987 scsi_rescan_device(&(sdev->sdev_gendev));
4988 scsi_device_put(sdev);
4989 spin_lock_irqsave(ap->lock, flags);
4993 spin_unlock_irqrestore(ap->lock, flags);
4994 mutex_unlock(&ap->scsi_scan_mutex);
4998 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4999 * @host: ATA host container for all SAS ports
5000 * @port_info: Information from low-level host driver
5001 * @shost: SCSI host that the scsi device is attached to
5004 * PCI/etc. bus probe sem.
5007 * ata_port pointer on success / NULL on failure.
5010 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
5011 struct ata_port_info *port_info,
5012 struct Scsi_Host *shost)
5014 struct ata_port *ap;
5016 ap = ata_port_alloc(host);
5021 ap->lock = &host->lock;
5022 ap->pio_mask = port_info->pio_mask;
5023 ap->mwdma_mask = port_info->mwdma_mask;
5024 ap->udma_mask = port_info->udma_mask;
5025 ap->flags |= port_info->flags;
5026 ap->ops = port_info->port_ops;
5027 ap->cbl = ATA_CBL_SATA;
5031 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
5034 * ata_sas_port_start - Set port up for dma.
5035 * @ap: Port to initialize
5037 * Called just after data structures for each port are
5040 * May be used as the port_start() entry in ata_port_operations.
5043 * Inherited from caller.
5045 int ata_sas_port_start(struct ata_port *ap)
5048 * the port is marked as frozen at allocation time, but if we don't
5049 * have new eh, we won't thaw it
5051 if (!ap->ops->error_handler)
5052 ap->pflags &= ~ATA_PFLAG_FROZEN;
5055 EXPORT_SYMBOL_GPL(ata_sas_port_start);
5058 * ata_port_stop - Undo ata_sas_port_start()
5059 * @ap: Port to shut down
5061 * May be used as the port_stop() entry in ata_port_operations.
5064 * Inherited from caller.
5067 void ata_sas_port_stop(struct ata_port *ap)
5070 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
5073 * ata_sas_async_probe - simply schedule probing and return
5074 * @ap: Port to probe
5076 * For batch scheduling of probe for sas attached ata devices, assumes
5077 * the port has already been through ata_sas_port_init()
5079 void ata_sas_async_probe(struct ata_port *ap)
5081 __ata_port_probe(ap);
5083 EXPORT_SYMBOL_GPL(ata_sas_async_probe);
5085 int ata_sas_sync_probe(struct ata_port *ap)
5087 return ata_port_probe(ap);
5089 EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
5093 * ata_sas_port_init - Initialize a SATA device
5094 * @ap: SATA port to initialize
5097 * PCI/etc. bus probe sem.
5100 * Zero on success, non-zero on error.
5103 int ata_sas_port_init(struct ata_port *ap)
5105 int rc = ap->ops->port_start(ap);
5109 ap->print_id = atomic_inc_return(&ata_print_id);
5112 EXPORT_SYMBOL_GPL(ata_sas_port_init);
5114 int ata_sas_tport_add(struct device *parent, struct ata_port *ap)
5116 return ata_tport_add(parent, ap);
5118 EXPORT_SYMBOL_GPL(ata_sas_tport_add);
5120 void ata_sas_tport_delete(struct ata_port *ap)
5122 ata_tport_delete(ap);
5124 EXPORT_SYMBOL_GPL(ata_sas_tport_delete);
5127 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
5128 * @ap: SATA port to destroy
5132 void ata_sas_port_destroy(struct ata_port *ap)
5134 if (ap->ops->port_stop)
5135 ap->ops->port_stop(ap);
5138 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
5141 * ata_sas_slave_configure - Default slave_config routine for libata devices
5142 * @sdev: SCSI device to configure
5143 * @ap: ATA port to which SCSI device is attached
5149 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
5151 ata_scsi_sdev_config(sdev);
5152 ata_scsi_dev_config(sdev, ap->link.device);
5155 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
5158 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
5159 * @cmd: SCSI command to be sent
5160 * @ap: ATA port to which the command is being sent
5163 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
5167 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
5171 ata_scsi_dump_cdb(ap, cmd);
5173 if (likely(ata_dev_enabled(ap->link.device)))
5174 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
5176 cmd->result = (DID_BAD_TARGET << 16);
5177 cmd->scsi_done(cmd);
5181 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
5183 int ata_sas_allocate_tag(struct ata_port *ap)
5185 unsigned int max_queue = ap->host->n_tags;
5186 unsigned int i, tag;
5188 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) {
5189 tag = tag < max_queue ? tag : 0;
5191 /* the last tag is reserved for internal command. */
5192 if (ata_tag_internal(tag))
5195 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) {
5196 ap->sas_last_tag = tag;
5203 void ata_sas_free_tag(unsigned int tag, struct ata_port *ap)
5205 clear_bit(tag, &ap->sas_tag_allocated);