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_MIN_POWER] = "min_power",
115 static ssize_t ata_scsi_lpm_store(struct device *device,
116 struct device_attribute *attr,
117 const char *buf, size_t count)
119 struct Scsi_Host *shost = class_to_shost(device);
120 struct ata_port *ap = ata_shost_to_port(shost);
121 struct ata_link *link;
122 struct ata_device *dev;
123 enum ata_lpm_policy policy;
126 /* UNKNOWN is internal state, iterate from MAX_POWER */
127 for (policy = ATA_LPM_MAX_POWER;
128 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
129 const char *name = ata_lpm_policy_names[policy];
131 if (strncmp(name, buf, strlen(name)) == 0)
134 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
137 spin_lock_irqsave(ap->lock, flags);
139 ata_for_each_link(link, ap, EDGE) {
140 ata_for_each_dev(dev, &ap->link, ENABLED) {
141 if (dev->horkage & ATA_HORKAGE_NOLPM) {
148 ap->target_lpm_policy = policy;
149 ata_port_schedule_eh(ap);
151 spin_unlock_irqrestore(ap->lock, flags);
155 static ssize_t ata_scsi_lpm_show(struct device *dev,
156 struct device_attribute *attr, char *buf)
158 struct Scsi_Host *shost = class_to_shost(dev);
159 struct ata_port *ap = ata_shost_to_port(shost);
161 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
164 return snprintf(buf, PAGE_SIZE, "%s\n",
165 ata_lpm_policy_names[ap->target_lpm_policy]);
167 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
168 ata_scsi_lpm_show, ata_scsi_lpm_store);
169 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
171 static ssize_t ata_scsi_park_show(struct device *device,
172 struct device_attribute *attr, char *buf)
174 struct scsi_device *sdev = to_scsi_device(device);
176 struct ata_link *link;
177 struct ata_device *dev;
182 ap = ata_shost_to_port(sdev->host);
184 spin_lock_irq(ap->lock);
185 dev = ata_scsi_find_dev(ap, sdev);
190 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
197 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
198 link->eh_context.unloaded_mask & (1 << dev->devno) &&
199 time_after(dev->unpark_deadline, now))
200 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
205 spin_unlock_irq(ap->lock);
207 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
210 static ssize_t ata_scsi_park_store(struct device *device,
211 struct device_attribute *attr,
212 const char *buf, size_t len)
214 struct scsi_device *sdev = to_scsi_device(device);
216 struct ata_device *dev;
221 rc = kstrtol(buf, 10, &input);
226 if (input > ATA_TMOUT_MAX_PARK) {
228 input = ATA_TMOUT_MAX_PARK;
231 ap = ata_shost_to_port(sdev->host);
233 spin_lock_irqsave(ap->lock, flags);
234 dev = ata_scsi_find_dev(ap, sdev);
235 if (unlikely(!dev)) {
239 if (dev->class != ATA_DEV_ATA &&
240 dev->class != ATA_DEV_ZAC) {
246 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
251 dev->unpark_deadline = ata_deadline(jiffies, input);
252 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
253 ata_port_schedule_eh(ap);
254 complete(&ap->park_req_pending);
258 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
261 dev->flags |= ATA_DFLAG_NO_UNLOAD;
266 spin_unlock_irqrestore(ap->lock, flags);
268 return rc ? rc : len;
270 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
271 ata_scsi_park_show, ata_scsi_park_store);
272 EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
274 static ssize_t ata_ncq_prio_enable_show(struct device *device,
275 struct device_attribute *attr,
278 struct scsi_device *sdev = to_scsi_device(device);
280 struct ata_device *dev;
281 bool ncq_prio_enable;
284 ap = ata_shost_to_port(sdev->host);
286 spin_lock_irq(ap->lock);
287 dev = ata_scsi_find_dev(ap, sdev);
293 ncq_prio_enable = dev->flags & ATA_DFLAG_NCQ_PRIO_ENABLE;
296 spin_unlock_irq(ap->lock);
298 return rc ? rc : snprintf(buf, 20, "%u\n", ncq_prio_enable);
301 static ssize_t ata_ncq_prio_enable_store(struct device *device,
302 struct device_attribute *attr,
303 const char *buf, size_t len)
305 struct scsi_device *sdev = to_scsi_device(device);
307 struct ata_device *dev;
311 rc = kstrtol(buf, 10, &input);
314 if ((input < 0) || (input > 1))
317 ap = ata_shost_to_port(sdev->host);
318 dev = ata_scsi_find_dev(ap, sdev);
322 spin_lock_irq(ap->lock);
324 dev->flags |= ATA_DFLAG_NCQ_PRIO_ENABLE;
326 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
328 dev->link->eh_info.action |= ATA_EH_REVALIDATE;
329 dev->link->eh_info.flags |= ATA_EHI_QUIET;
330 ata_port_schedule_eh(ap);
331 spin_unlock_irq(ap->lock);
333 ata_port_wait_eh(ap);
336 spin_lock_irq(ap->lock);
337 if (!(dev->flags & ATA_DFLAG_NCQ_PRIO)) {
338 dev->flags &= ~ATA_DFLAG_NCQ_PRIO_ENABLE;
341 spin_unlock_irq(ap->lock);
344 return rc ? rc : len;
347 DEVICE_ATTR(ncq_prio_enable, S_IRUGO | S_IWUSR,
348 ata_ncq_prio_enable_show, ata_ncq_prio_enable_store);
349 EXPORT_SYMBOL_GPL(dev_attr_ncq_prio_enable);
351 void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd,
352 u8 sk, u8 asc, u8 ascq)
354 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
359 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
361 scsi_build_sense_buffer(d_sense, cmd->sense_buffer, sk, asc, ascq);
364 void ata_scsi_set_sense_information(struct ata_device *dev,
365 struct scsi_cmnd *cmd,
366 const struct ata_taskfile *tf)
373 information = ata_tf_read_block(tf, dev);
374 if (information == U64_MAX)
377 scsi_set_sense_information(cmd->sense_buffer,
378 SCSI_SENSE_BUFFERSIZE, information);
381 static void ata_scsi_set_invalid_field(struct ata_device *dev,
382 struct scsi_cmnd *cmd, u16 field, u8 bit)
384 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0);
385 /* "Invalid field in CDB" */
386 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
390 static void ata_scsi_set_invalid_parameter(struct ata_device *dev,
391 struct scsi_cmnd *cmd, u16 field)
393 /* "Invalid field in parameter list" */
394 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0);
395 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
400 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
401 const char *buf, size_t count)
403 struct Scsi_Host *shost = class_to_shost(dev);
404 struct ata_port *ap = ata_shost_to_port(shost);
405 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
406 return ap->ops->em_store(ap, buf, count);
411 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
414 struct Scsi_Host *shost = class_to_shost(dev);
415 struct ata_port *ap = ata_shost_to_port(shost);
417 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
418 return ap->ops->em_show(ap, buf);
421 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
422 ata_scsi_em_message_show, ata_scsi_em_message_store);
423 EXPORT_SYMBOL_GPL(dev_attr_em_message);
426 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
429 struct Scsi_Host *shost = class_to_shost(dev);
430 struct ata_port *ap = ata_shost_to_port(shost);
432 return snprintf(buf, 23, "%d\n", ap->em_message_type);
434 DEVICE_ATTR(em_message_type, S_IRUGO,
435 ata_scsi_em_message_type_show, NULL);
436 EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
439 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
442 struct scsi_device *sdev = to_scsi_device(dev);
443 struct ata_port *ap = ata_shost_to_port(sdev->host);
444 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
446 if (atadev && ap->ops->sw_activity_show &&
447 (ap->flags & ATA_FLAG_SW_ACTIVITY))
448 return ap->ops->sw_activity_show(atadev, buf);
453 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
454 const char *buf, size_t count)
456 struct scsi_device *sdev = to_scsi_device(dev);
457 struct ata_port *ap = ata_shost_to_port(sdev->host);
458 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
459 enum sw_activity val;
462 if (atadev && ap->ops->sw_activity_store &&
463 (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
464 val = simple_strtoul(buf, NULL, 0);
466 case OFF: case BLINK_ON: case BLINK_OFF:
467 rc = ap->ops->sw_activity_store(atadev, val);
476 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
477 ata_scsi_activity_store);
478 EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
480 struct device_attribute *ata_common_sdev_attrs[] = {
481 &dev_attr_unload_heads,
482 &dev_attr_ncq_prio_enable,
485 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
488 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
489 * @sdev: SCSI device for which BIOS geometry is to be determined
490 * @bdev: block device associated with @sdev
491 * @capacity: capacity of SCSI device
492 * @geom: location to which geometry will be output
494 * Generic bios head/sector/cylinder calculator
495 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
496 * mapping. Some situations may arise where the disk is not
497 * bootable if this is not used.
500 * Defined by the SCSI layer. We don't really care.
505 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
506 sector_t capacity, int geom[])
510 sector_div(capacity, 255*63);
517 * ata_scsi_unlock_native_capacity - unlock native capacity
518 * @sdev: SCSI device to adjust device capacity for
520 * This function is called if a partition on @sdev extends beyond
521 * the end of the device. It requests EH to unlock HPA.
524 * Defined by the SCSI layer. Might sleep.
526 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
528 struct ata_port *ap = ata_shost_to_port(sdev->host);
529 struct ata_device *dev;
532 spin_lock_irqsave(ap->lock, flags);
534 dev = ata_scsi_find_dev(ap, sdev);
535 if (dev && dev->n_sectors < dev->n_native_sectors) {
536 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
537 dev->link->eh_info.action |= ATA_EH_RESET;
538 ata_port_schedule_eh(ap);
541 spin_unlock_irqrestore(ap->lock, flags);
542 ata_port_wait_eh(ap);
546 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
548 * @sdev: SCSI device to get identify data for
549 * @arg: User buffer area for identify data
552 * Defined by the SCSI layer. We don't really care.
555 * Zero on success, negative errno on error.
557 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
560 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
561 u16 __user *dst = arg;
567 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
570 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
571 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
574 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
575 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
578 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
579 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
586 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
587 * @scsidev: Device to which we are issuing command
588 * @arg: User provided data for issuing command
591 * Defined by the SCSI layer. We don't really care.
594 * Zero on success, negative errno on error.
596 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
599 u8 scsi_cmd[MAX_COMMAND_SIZE];
600 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
602 enum dma_data_direction data_dir;
603 struct scsi_sense_hdr sshdr;
609 if (copy_from_user(args, arg, sizeof(args)))
612 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
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))
693 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
694 * @scsidev: Device to which we are issuing command
695 * @arg: User provided data for issuing command
698 * Defined by the SCSI layer. We don't really care.
701 * Zero on success, negative errno on error.
703 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
706 u8 scsi_cmd[MAX_COMMAND_SIZE];
707 u8 args[7], *sensebuf = NULL;
708 struct scsi_sense_hdr sshdr;
714 if (copy_from_user(args, arg, sizeof(args)))
717 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
721 memset(scsi_cmd, 0, sizeof(scsi_cmd));
722 scsi_cmd[0] = ATA_16;
723 scsi_cmd[1] = (3 << 1); /* Non-data */
724 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
725 scsi_cmd[4] = args[1];
726 scsi_cmd[6] = args[2];
727 scsi_cmd[8] = args[3];
728 scsi_cmd[10] = args[4];
729 scsi_cmd[12] = args[5];
730 scsi_cmd[13] = args[6] & 0x4f;
731 scsi_cmd[14] = args[0];
733 /* Good values for timeout and retries? Values below
734 from scsi_ioctl_send_command() for default case... */
735 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
736 sensebuf, &sshdr, (10*HZ), 5, 0, 0, NULL);
738 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
739 u8 *desc = sensebuf + 8;
740 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
742 /* If we set cc then ATA pass-through will cause a
743 * check condition even if no error. Filter that. */
744 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
745 if (sshdr.sense_key == RECOVERED_ERROR &&
746 sshdr.asc == 0 && sshdr.ascq == 0x1d)
747 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
750 /* Send userspace ATA registers */
751 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
752 desc[0] == 0x09) {/* code is "ATA Descriptor" */
753 args[0] = desc[13]; /* status */
754 args[1] = desc[3]; /* error */
755 args[2] = desc[5]; /* sector count (0:7) */
756 args[3] = desc[7]; /* lbal */
757 args[4] = desc[9]; /* lbam */
758 args[5] = desc[11]; /* lbah */
759 args[6] = desc[12]; /* select */
760 if (copy_to_user(arg, args, sizeof(args)))
775 static int ata_ioc32(struct ata_port *ap)
777 if (ap->flags & ATA_FLAG_PIO_DMA)
779 if (ap->pflags & ATA_PFLAG_PIO32)
784 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
785 int cmd, void __user *arg)
793 spin_lock_irqsave(ap->lock, flags);
795 spin_unlock_irqrestore(ap->lock, flags);
796 return put_user(val, (unsigned long __user *)arg);
799 val = (unsigned long) arg;
801 spin_lock_irqsave(ap->lock, flags);
802 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
804 ap->pflags |= ATA_PFLAG_PIO32;
806 ap->pflags &= ~ATA_PFLAG_PIO32;
808 if (val != ata_ioc32(ap))
811 spin_unlock_irqrestore(ap->lock, flags);
814 case HDIO_GET_IDENTITY:
815 return ata_get_identity(ap, scsidev, arg);
818 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
820 return ata_cmd_ioctl(scsidev, arg);
822 case HDIO_DRIVE_TASK:
823 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
825 return ata_task_ioctl(scsidev, arg);
834 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
836 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
838 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
841 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
844 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
845 * @dev: ATA device to which the new command is attached
846 * @cmd: SCSI command that originated this ATA command
848 * Obtain a reference to an unused ata_queued_cmd structure,
849 * which is the basic libata structure representing a single
850 * ATA command sent to the hardware.
852 * If a command was available, fill in the SCSI-specific
853 * portions of the structure with information on the
857 * spin_lock_irqsave(host lock)
860 * Command allocated, or %NULL if none available.
862 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
863 struct scsi_cmnd *cmd)
865 struct ata_queued_cmd *qc;
867 qc = ata_qc_new_init(dev, cmd->request->tag);
870 qc->scsidone = cmd->scsi_done;
872 qc->sg = scsi_sglist(cmd);
873 qc->n_elem = scsi_sg_count(cmd);
875 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
882 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
884 struct scsi_cmnd *scmd = qc->scsicmd;
886 qc->extrabytes = scmd->request->extra_len;
887 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
891 * ata_dump_status - user friendly display of error info
892 * @id: id of the port in question
893 * @tf: ptr to filled out taskfile
895 * Decode and dump the ATA error/status registers for the user so
896 * that they have some idea what really happened at the non
897 * make-believe layer.
900 * inherited from caller
902 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
904 u8 stat = tf->command, err = tf->feature;
906 pr_warn("ata%u: status=0x%02x { ", id, stat);
907 if (stat & ATA_BUSY) {
908 pr_cont("Busy }\n"); /* Data is not valid in this case */
910 if (stat & ATA_DRDY) pr_cont("DriveReady ");
911 if (stat & ATA_DF) pr_cont("DeviceFault ");
912 if (stat & ATA_DSC) pr_cont("SeekComplete ");
913 if (stat & ATA_DRQ) pr_cont("DataRequest ");
914 if (stat & ATA_CORR) pr_cont("CorrectedError ");
915 if (stat & ATA_SENSE) pr_cont("Sense ");
916 if (stat & ATA_ERR) pr_cont("Error ");
920 pr_warn("ata%u: error=0x%02x { ", id, err);
921 if (err & ATA_ABORTED) pr_cont("DriveStatusError ");
922 if (err & ATA_ICRC) {
923 if (err & ATA_ABORTED)
925 else pr_cont("Sector ");
927 if (err & ATA_UNC) pr_cont("UncorrectableError ");
928 if (err & ATA_IDNF) pr_cont("SectorIdNotFound ");
929 if (err & ATA_TRK0NF) pr_cont("TrackZeroNotFound ");
930 if (err & ATA_AMNF) pr_cont("AddrMarkNotFound ");
937 * ata_to_sense_error - convert ATA error to SCSI error
938 * @id: ATA device number
939 * @drv_stat: value contained in ATA status register
940 * @drv_err: value contained in ATA error register
941 * @sk: the sense key we'll fill out
942 * @asc: the additional sense code we'll fill out
943 * @ascq: the additional sense code qualifier we'll fill out
944 * @verbose: be verbose
946 * Converts an ATA error into a SCSI error. Fill out pointers to
947 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
948 * format sense blocks.
951 * spin_lock_irqsave(host lock)
953 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
954 u8 *asc, u8 *ascq, int verbose)
958 /* Based on the 3ware driver translation table */
959 static const unsigned char sense_table[][4] = {
961 {0xd1, ABORTED_COMMAND, 0x00, 0x00},
962 // Device busy Aborted command
964 {0xd0, ABORTED_COMMAND, 0x00, 0x00},
965 // Device busy Aborted command
967 {0x61, HARDWARE_ERROR, 0x00, 0x00},
968 // Device fault Hardware error
969 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
970 {0x84, ABORTED_COMMAND, 0x47, 0x00},
971 // Data CRC error SCSI parity error
972 /* MC|ID|ABRT|TRK0|MARK */
973 {0x37, NOT_READY, 0x04, 0x00},
974 // Unit offline Not ready
976 {0x09, NOT_READY, 0x04, 0x00},
977 // Unrecovered disk error Not ready
978 /* Bad address mark */
979 {0x01, MEDIUM_ERROR, 0x13, 0x00},
980 // Address mark not found for data field
981 /* TRK0 - Track 0 not found */
982 {0x02, HARDWARE_ERROR, 0x00, 0x00},
984 /* Abort: 0x04 is not translated here, see below */
985 /* Media change request */
986 {0x08, NOT_READY, 0x04, 0x00},
987 // FIXME: faking offline
988 /* SRV/IDNF - ID not found */
989 {0x10, ILLEGAL_REQUEST, 0x21, 0x00},
990 // Logical address out of range
991 /* MC - Media Changed */
992 {0x20, UNIT_ATTENTION, 0x28, 0x00},
993 // Not ready to ready change, medium may have changed
994 /* ECC - Uncorrectable ECC error */
995 {0x40, MEDIUM_ERROR, 0x11, 0x04},
996 // Unrecovered read error
997 /* BBD - block marked bad */
998 {0x80, MEDIUM_ERROR, 0x11, 0x04},
999 // Block marked bad Medium error, unrecovered read error
1000 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1002 static const unsigned char stat_table[][4] = {
1003 /* Must be first because BUSY means no other bits valid */
1004 {0x80, ABORTED_COMMAND, 0x47, 0x00},
1005 // Busy, fake parity for now
1006 {0x40, ILLEGAL_REQUEST, 0x21, 0x04},
1007 // Device ready, unaligned write command
1008 {0x20, HARDWARE_ERROR, 0x44, 0x00},
1009 // Device fault, internal target failure
1010 {0x08, ABORTED_COMMAND, 0x47, 0x00},
1011 // Timed out in xfer, fake parity for now
1012 {0x04, RECOVERED_ERROR, 0x11, 0x00},
1013 // Recovered ECC error Medium error, recovered
1014 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1018 * Is this an error we can process/parse
1020 if (drv_stat & ATA_BUSY) {
1021 drv_err = 0; /* Ignore the err bits, they're invalid */
1025 /* Look for drv_err */
1026 for (i = 0; sense_table[i][0] != 0xFF; i++) {
1027 /* Look for best matches first */
1028 if ((sense_table[i][0] & drv_err) ==
1029 sense_table[i][0]) {
1030 *sk = sense_table[i][1];
1031 *asc = sense_table[i][2];
1032 *ascq = sense_table[i][3];
1033 goto translate_done;
1039 * Fall back to interpreting status bits. Note that if the drv_err
1040 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
1041 * is not descriptive enough.
1043 for (i = 0; stat_table[i][0] != 0xFF; i++) {
1044 if (stat_table[i][0] & drv_stat) {
1045 *sk = stat_table[i][1];
1046 *asc = stat_table[i][2];
1047 *ascq = stat_table[i][3];
1048 goto translate_done;
1053 * We need a sensible error return here, which is tricky, and one
1054 * that won't cause people to do things like return a disk wrongly.
1056 *sk = ABORTED_COMMAND;
1062 pr_err("ata%u: translated ATA stat/err 0x%02x/%02x to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
1063 id, drv_stat, drv_err, *sk, *asc, *ascq);
1068 * ata_gen_passthru_sense - Generate check condition sense block.
1069 * @qc: Command that completed.
1071 * This function is specific to the ATA descriptor format sense
1072 * block specified for the ATA pass through commands. Regardless
1073 * of whether the command errored or not, return a sense
1074 * block. Copy all controller registers into the sense
1075 * block. If there was no error, we get the request from an ATA
1076 * passthrough command, so we use the following sense data:
1077 * sk = RECOVERED ERROR
1078 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1084 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
1086 struct scsi_cmnd *cmd = qc->scsicmd;
1087 struct ata_taskfile *tf = &qc->result_tf;
1088 unsigned char *sb = cmd->sense_buffer;
1089 unsigned char *desc = sb + 8;
1090 int verbose = qc->ap->ops->error_handler == NULL;
1091 u8 sense_key, asc, ascq;
1093 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1095 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1098 * Use ata_to_sense_error() to map status register bits
1099 * onto sense key, asc & ascq.
1102 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1103 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1104 &sense_key, &asc, &ascq, verbose);
1105 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq);
1108 * ATA PASS-THROUGH INFORMATION AVAILABLE
1109 * Always in descriptor format sense.
1111 scsi_build_sense_buffer(1, cmd->sense_buffer,
1112 RECOVERED_ERROR, 0, 0x1D);
1115 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) {
1118 /* descriptor format */
1120 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9);
1122 if (SCSI_SENSE_BUFFERSIZE < len + 14)
1125 desc = sb + 8 + len;
1130 * Copy registers into sense buffer.
1133 desc[3] = tf->feature; /* == error reg */
1134 desc[5] = tf->nsect;
1137 desc[11] = tf->lbah;
1138 desc[12] = tf->device;
1139 desc[13] = tf->command; /* == status reg */
1142 * Fill in Extend bit, and the high order bytes
1145 if (tf->flags & ATA_TFLAG_LBA48) {
1147 desc[4] = tf->hob_nsect;
1148 desc[6] = tf->hob_lbal;
1149 desc[8] = tf->hob_lbam;
1150 desc[10] = tf->hob_lbah;
1153 /* Fixed sense format */
1154 desc[0] = tf->feature;
1155 desc[1] = tf->command; /* status */
1156 desc[2] = tf->device;
1157 desc[3] = tf->nsect;
1159 if (tf->flags & ATA_TFLAG_LBA48) {
1163 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah)
1167 desc[10] = tf->lbam;
1168 desc[11] = tf->lbah;
1173 * ata_gen_ata_sense - generate a SCSI fixed sense block
1174 * @qc: Command that we are erroring out
1176 * Generate sense block for a failed ATA command @qc. Descriptor
1177 * format is used to accommodate LBA48 block address.
1182 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1184 struct ata_device *dev = qc->dev;
1185 struct scsi_cmnd *cmd = qc->scsicmd;
1186 struct ata_taskfile *tf = &qc->result_tf;
1187 unsigned char *sb = cmd->sense_buffer;
1188 int verbose = qc->ap->ops->error_handler == NULL;
1190 u8 sense_key, asc, ascq;
1192 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1194 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1196 if (ata_dev_disabled(dev)) {
1197 /* Device disabled after error recovery */
1198 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
1199 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21);
1202 /* Use ata_to_sense_error() to map status register bits
1203 * onto sense key, asc & ascq.
1206 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1207 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1208 &sense_key, &asc, &ascq, verbose);
1209 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq);
1211 /* Could not decode error */
1212 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n",
1213 tf->command, qc->err_mask);
1214 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0);
1218 block = ata_tf_read_block(&qc->result_tf, dev);
1219 if (block == U64_MAX)
1222 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block);
1225 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1227 sdev->use_10_for_rw = 1;
1228 sdev->use_10_for_ms = 1;
1229 sdev->no_write_same = 1;
1231 /* Schedule policy is determined by ->qc_defer() callback and
1232 * it needs to see every deferred qc. Set dev_blocked to 1 to
1233 * prevent SCSI midlayer from automatically deferring
1236 sdev->max_device_blocked = 1;
1240 * atapi_drain_needed - Check whether data transfer may overflow
1241 * @rq: request to be checked
1243 * ATAPI commands which transfer variable length data to host
1244 * might overflow due to application error or hardware bug. This
1245 * function checks whether overflow should be drained and ignored
1252 * 1 if ; otherwise, 0.
1254 static int atapi_drain_needed(struct request *rq)
1256 if (likely(!blk_rq_is_passthrough(rq)))
1259 if (!blk_rq_bytes(rq) || op_is_write(req_op(rq)))
1262 return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC;
1265 static int ata_scsi_dev_config(struct scsi_device *sdev,
1266 struct ata_device *dev)
1268 struct request_queue *q = sdev->request_queue;
1270 if (!ata_id_has_unload(dev->id))
1271 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1273 /* configure max sectors */
1274 blk_queue_max_hw_sectors(q, dev->max_sectors);
1276 if (dev->class == ATA_DEV_ATAPI) {
1279 sdev->sector_size = ATA_SECT_SIZE;
1281 /* set DMA padding */
1282 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1284 /* configure draining */
1285 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1287 ata_dev_err(dev, "drain buffer allocation failed\n");
1291 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1293 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1294 sdev->manage_start_stop = 1;
1298 * ata_pio_sectors() expects buffer for each sector to not cross
1299 * page boundary. Enforce it by requiring buffers to be sector
1300 * aligned, which works iff sector_size is not larger than
1301 * PAGE_SIZE. ATAPI devices also need the alignment as
1302 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1304 if (sdev->sector_size > PAGE_SIZE)
1306 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1309 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1311 if (dev->flags & ATA_DFLAG_AN)
1312 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1314 if (dev->flags & ATA_DFLAG_NCQ) {
1317 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1318 depth = min(ATA_MAX_QUEUE - 1, depth);
1319 scsi_change_queue_depth(sdev, depth);
1322 blk_queue_flush_queueable(q, false);
1324 if (dev->flags & ATA_DFLAG_TRUSTED)
1325 sdev->security_supported = 1;
1332 * ata_scsi_slave_config - Set SCSI device attributes
1333 * @sdev: SCSI device to examine
1335 * This is called before we actually start reading
1336 * and writing to the device, to configure certain
1337 * SCSI mid-layer behaviors.
1340 * Defined by SCSI layer. We don't really care.
1343 int ata_scsi_slave_config(struct scsi_device *sdev)
1345 struct ata_port *ap = ata_shost_to_port(sdev->host);
1346 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1349 ata_scsi_sdev_config(sdev);
1352 rc = ata_scsi_dev_config(sdev, dev);
1358 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1359 * @sdev: SCSI device to be destroyed
1361 * @sdev is about to be destroyed for hot/warm unplugging. If
1362 * this unplugging was initiated by libata as indicated by NULL
1363 * dev->sdev, this function doesn't have to do anything.
1364 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1365 * Clear dev->sdev, schedule the device for ATA detach and invoke
1369 * Defined by SCSI layer. We don't really care.
1371 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1373 struct ata_port *ap = ata_shost_to_port(sdev->host);
1374 struct request_queue *q = sdev->request_queue;
1375 unsigned long flags;
1376 struct ata_device *dev;
1378 if (!ap->ops->error_handler)
1381 spin_lock_irqsave(ap->lock, flags);
1382 dev = __ata_scsi_find_dev(ap, sdev);
1383 if (dev && dev->sdev) {
1384 /* SCSI device already in CANCEL state, no need to offline it */
1386 dev->flags |= ATA_DFLAG_DETACH;
1387 ata_port_schedule_eh(ap);
1389 spin_unlock_irqrestore(ap->lock, flags);
1391 kfree(q->dma_drain_buffer);
1392 q->dma_drain_buffer = NULL;
1393 q->dma_drain_size = 0;
1397 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1398 * @ap: ATA port to which the device change the queue depth
1399 * @sdev: SCSI device to configure queue depth for
1400 * @queue_depth: new queue depth
1402 * libsas and libata have different approaches for associating a sdev to
1406 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1409 struct ata_device *dev;
1410 unsigned long flags;
1412 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1413 return sdev->queue_depth;
1415 dev = ata_scsi_find_dev(ap, sdev);
1416 if (!dev || !ata_dev_enabled(dev))
1417 return sdev->queue_depth;
1420 spin_lock_irqsave(ap->lock, flags);
1421 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1422 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1423 dev->flags |= ATA_DFLAG_NCQ_OFF;
1426 spin_unlock_irqrestore(ap->lock, flags);
1428 /* limit and apply queue depth */
1429 queue_depth = min(queue_depth, sdev->host->can_queue);
1430 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1431 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1433 if (sdev->queue_depth == queue_depth)
1436 return scsi_change_queue_depth(sdev, queue_depth);
1440 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1441 * @sdev: SCSI device to configure queue depth for
1442 * @queue_depth: new queue depth
1444 * This is libata standard hostt->change_queue_depth callback.
1445 * SCSI will call into this callback when user tries to set queue
1449 * SCSI layer (we don't care)
1452 * Newly configured queue depth.
1454 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1456 struct ata_port *ap = ata_shost_to_port(sdev->host);
1458 return __ata_change_queue_depth(ap, sdev, queue_depth);
1462 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1463 * @qc: Storage for translated ATA taskfile
1465 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1466 * (to start). Perhaps these commands should be preceded by
1467 * CHECK POWER MODE to see what power mode the device is already in.
1468 * [See SAT revision 5 at www.t10.org]
1471 * spin_lock_irqsave(host lock)
1474 * Zero on success, non-zero on error.
1476 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1478 struct scsi_cmnd *scmd = qc->scsicmd;
1479 struct ata_taskfile *tf = &qc->tf;
1480 const u8 *cdb = scmd->cmnd;
1484 if (scmd->cmd_len < 5) {
1489 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1490 tf->protocol = ATA_PROT_NODATA;
1492 ; /* ignore IMMED bit, violates sat-r05 */
1497 goto invalid_fld; /* LOEJ bit set not supported */
1499 if (((cdb[4] >> 4) & 0xf) != 0) {
1502 goto invalid_fld; /* power conditions not supported */
1506 tf->nsect = 1; /* 1 sector, lba=0 */
1508 if (qc->dev->flags & ATA_DFLAG_LBA) {
1509 tf->flags |= ATA_TFLAG_LBA;
1514 tf->device |= ATA_LBA;
1517 tf->lbal = 0x1; /* sect */
1518 tf->lbam = 0x0; /* cyl low */
1519 tf->lbah = 0x0; /* cyl high */
1522 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1524 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1525 * or S5) causing some drives to spin up and down again.
1527 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1528 system_state == SYSTEM_POWER_OFF)
1531 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1532 system_entering_hibernation())
1535 /* Issue ATA STANDBY IMMEDIATE command */
1536 tf->command = ATA_CMD_STANDBYNOW1;
1540 * Standby and Idle condition timers could be implemented but that
1541 * would require libata to implement the Power condition mode page
1542 * and allow the user to change it. Changing mode pages requires
1543 * MODE SELECT to be implemented.
1549 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
1552 scmd->result = SAM_STAT_GOOD;
1558 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1559 * @qc: Storage for translated ATA taskfile
1561 * Sets up an ATA taskfile to issue FLUSH CACHE or
1565 * spin_lock_irqsave(host lock)
1568 * Zero on success, non-zero on error.
1570 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1572 struct ata_taskfile *tf = &qc->tf;
1574 tf->flags |= ATA_TFLAG_DEVICE;
1575 tf->protocol = ATA_PROT_NODATA;
1577 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1578 tf->command = ATA_CMD_FLUSH_EXT;
1580 tf->command = ATA_CMD_FLUSH;
1582 /* flush is critical for IO integrity, consider it an IO command */
1583 qc->flags |= ATA_QCFLAG_IO;
1589 * scsi_6_lba_len - Get LBA and transfer length
1590 * @cdb: SCSI command to translate
1592 * Calculate LBA and transfer length for 6-byte commands.
1596 * @plen: the transfer length
1598 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1603 VPRINTK("six-byte command\n");
1605 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1606 lba |= ((u64)cdb[2]) << 8;
1607 lba |= ((u64)cdb[3]);
1616 * scsi_10_lba_len - Get LBA and transfer length
1617 * @cdb: SCSI command to translate
1619 * Calculate LBA and transfer length for 10-byte commands.
1623 * @plen: the transfer length
1625 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1630 VPRINTK("ten-byte command\n");
1632 lba |= ((u64)cdb[2]) << 24;
1633 lba |= ((u64)cdb[3]) << 16;
1634 lba |= ((u64)cdb[4]) << 8;
1635 lba |= ((u64)cdb[5]);
1637 len |= ((u32)cdb[7]) << 8;
1638 len |= ((u32)cdb[8]);
1645 * scsi_16_lba_len - Get LBA and transfer length
1646 * @cdb: SCSI command to translate
1648 * Calculate LBA and transfer length for 16-byte commands.
1652 * @plen: the transfer length
1654 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1659 VPRINTK("sixteen-byte command\n");
1661 lba |= ((u64)cdb[2]) << 56;
1662 lba |= ((u64)cdb[3]) << 48;
1663 lba |= ((u64)cdb[4]) << 40;
1664 lba |= ((u64)cdb[5]) << 32;
1665 lba |= ((u64)cdb[6]) << 24;
1666 lba |= ((u64)cdb[7]) << 16;
1667 lba |= ((u64)cdb[8]) << 8;
1668 lba |= ((u64)cdb[9]);
1670 len |= ((u32)cdb[10]) << 24;
1671 len |= ((u32)cdb[11]) << 16;
1672 len |= ((u32)cdb[12]) << 8;
1673 len |= ((u32)cdb[13]);
1680 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1681 * @qc: Storage for translated ATA taskfile
1683 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1686 * spin_lock_irqsave(host lock)
1689 * Zero on success, non-zero on error.
1691 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1693 struct scsi_cmnd *scmd = qc->scsicmd;
1694 struct ata_taskfile *tf = &qc->tf;
1695 struct ata_device *dev = qc->dev;
1696 u64 dev_sectors = qc->dev->n_sectors;
1697 const u8 *cdb = scmd->cmnd;
1702 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1703 tf->protocol = ATA_PROT_NODATA;
1705 if (cdb[0] == VERIFY) {
1706 if (scmd->cmd_len < 10) {
1710 scsi_10_lba_len(cdb, &block, &n_block);
1711 } else if (cdb[0] == VERIFY_16) {
1712 if (scmd->cmd_len < 16) {
1716 scsi_16_lba_len(cdb, &block, &n_block);
1724 if (block >= dev_sectors)
1726 if ((block + n_block) > dev_sectors)
1729 if (dev->flags & ATA_DFLAG_LBA) {
1730 tf->flags |= ATA_TFLAG_LBA;
1732 if (lba_28_ok(block, n_block)) {
1734 tf->command = ATA_CMD_VERIFY;
1735 tf->device |= (block >> 24) & 0xf;
1736 } else if (lba_48_ok(block, n_block)) {
1737 if (!(dev->flags & ATA_DFLAG_LBA48))
1741 tf->flags |= ATA_TFLAG_LBA48;
1742 tf->command = ATA_CMD_VERIFY_EXT;
1744 tf->hob_nsect = (n_block >> 8) & 0xff;
1746 tf->hob_lbah = (block >> 40) & 0xff;
1747 tf->hob_lbam = (block >> 32) & 0xff;
1748 tf->hob_lbal = (block >> 24) & 0xff;
1750 /* request too large even for LBA48 */
1753 tf->nsect = n_block & 0xff;
1755 tf->lbah = (block >> 16) & 0xff;
1756 tf->lbam = (block >> 8) & 0xff;
1757 tf->lbal = block & 0xff;
1759 tf->device |= ATA_LBA;
1762 u32 sect, head, cyl, track;
1764 if (!lba_28_ok(block, n_block))
1767 /* Convert LBA to CHS */
1768 track = (u32)block / dev->sectors;
1769 cyl = track / dev->heads;
1770 head = track % dev->heads;
1771 sect = (u32)block % dev->sectors + 1;
1773 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1774 (u32)block, track, cyl, head, sect);
1776 /* Check whether the converted CHS can fit.
1780 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1783 tf->command = ATA_CMD_VERIFY;
1784 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1787 tf->lbah = cyl >> 8;
1794 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1798 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1799 /* "Logical Block Address out of range" */
1803 scmd->result = SAM_STAT_GOOD;
1807 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks)
1809 struct request *rq = scmd->request;
1812 if (!blk_rq_is_passthrough(rq))
1815 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size;
1816 if (n_blocks > req_blocks)
1823 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1824 * @qc: Storage for translated ATA taskfile
1826 * Converts any of six SCSI read/write commands into the
1827 * ATA counterpart, including starting sector (LBA),
1828 * sector count, and taking into account the device's LBA48
1831 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1832 * %WRITE_16 are currently supported.
1835 * spin_lock_irqsave(host lock)
1838 * Zero on success, non-zero on error.
1840 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1842 struct scsi_cmnd *scmd = qc->scsicmd;
1843 const u8 *cdb = scmd->cmnd;
1844 struct request *rq = scmd->request;
1845 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
1846 unsigned int tf_flags = 0;
1852 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1853 tf_flags |= ATA_TFLAG_WRITE;
1855 /* Calculate the SCSI LBA, transfer length and FUA. */
1859 if (unlikely(scmd->cmd_len < 10)) {
1863 scsi_10_lba_len(cdb, &block, &n_block);
1864 if (cdb[1] & (1 << 3))
1865 tf_flags |= ATA_TFLAG_FUA;
1866 if (!ata_check_nblocks(scmd, n_block))
1871 if (unlikely(scmd->cmd_len < 6)) {
1875 scsi_6_lba_len(cdb, &block, &n_block);
1877 /* for 6-byte r/w commands, transfer length 0
1878 * means 256 blocks of data, not 0 block.
1882 if (!ata_check_nblocks(scmd, n_block))
1887 if (unlikely(scmd->cmd_len < 16)) {
1891 scsi_16_lba_len(cdb, &block, &n_block);
1892 if (cdb[1] & (1 << 3))
1893 tf_flags |= ATA_TFLAG_FUA;
1894 if (!ata_check_nblocks(scmd, n_block))
1898 DPRINTK("no-byte command\n");
1903 /* Check and compose ATA command */
1905 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1906 * length 0 means transfer 0 block of data.
1907 * However, for ATA R/W commands, sector count 0 means
1908 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1910 * WARNING: one or two older ATA drives treat 0 as 0...
1914 qc->flags |= ATA_QCFLAG_IO;
1915 qc->nbytes = n_block * scmd->device->sector_size;
1917 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1920 if (likely(rc == 0))
1925 /* treat all other errors as -EINVAL, fall through */
1927 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1931 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1932 /* "Logical Block Address out of range" */
1936 scmd->result = SAM_STAT_GOOD;
1940 static void ata_qc_done(struct ata_queued_cmd *qc)
1942 struct scsi_cmnd *cmd = qc->scsicmd;
1943 void (*done)(struct scsi_cmnd *) = qc->scsidone;
1949 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1951 struct ata_port *ap = qc->ap;
1952 struct scsi_cmnd *cmd = qc->scsicmd;
1953 u8 *cdb = cmd->cmnd;
1954 int need_sense = (qc->err_mask != 0);
1956 /* For ATA pass thru (SAT) commands, generate a sense block if
1957 * user mandated it or if there's an error. Note that if we
1958 * generate because the user forced us to [CK_COND =1], a check
1959 * condition is generated and the ATA register values are returned
1960 * whether the command completed successfully or not. If there
1961 * was no error, we use the following sense data:
1962 * sk = RECOVERED ERROR
1963 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1965 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1966 ((cdb[2] & 0x20) || need_sense))
1967 ata_gen_passthru_sense(qc);
1968 else if (qc->flags & ATA_QCFLAG_SENSE_VALID)
1969 cmd->result = SAM_STAT_CHECK_CONDITION;
1970 else if (need_sense)
1971 ata_gen_ata_sense(qc);
1973 cmd->result = SAM_STAT_GOOD;
1975 if (need_sense && !ap->ops->error_handler)
1976 ata_dump_status(ap->print_id, &qc->result_tf);
1982 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1983 * @dev: ATA device to which the command is addressed
1984 * @cmd: SCSI command to execute
1985 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1987 * Our ->queuecommand() function has decided that the SCSI
1988 * command issued can be directly translated into an ATA
1989 * command, rather than handled internally.
1991 * This function sets up an ata_queued_cmd structure for the
1992 * SCSI command, and sends that ata_queued_cmd to the hardware.
1994 * The xlat_func argument (actor) returns 0 if ready to execute
1995 * ATA command, else 1 to finish translation. If 1 is returned
1996 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1997 * to be set reflecting an error condition or clean (early)
2001 * spin_lock_irqsave(host lock)
2004 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
2005 * needs to be deferred.
2007 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
2008 ata_xlat_func_t xlat_func)
2010 struct ata_port *ap = dev->link->ap;
2011 struct ata_queued_cmd *qc;
2016 qc = ata_scsi_qc_new(dev, cmd);
2020 /* data is present; dma-map it */
2021 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
2022 cmd->sc_data_direction == DMA_TO_DEVICE) {
2023 if (unlikely(scsi_bufflen(cmd) < 1)) {
2024 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
2028 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
2030 qc->dma_dir = cmd->sc_data_direction;
2033 qc->complete_fn = ata_scsi_qc_complete;
2038 if (ap->ops->qc_defer) {
2039 if ((rc = ap->ops->qc_defer(qc)))
2043 /* select device, send command to hardware */
2051 cmd->scsi_done(cmd);
2052 DPRINTK("EXIT - early finish (good or error)\n");
2057 cmd->result = (DID_ERROR << 16);
2058 cmd->scsi_done(cmd);
2060 DPRINTK("EXIT - internal\n");
2065 DPRINTK("EXIT - defer\n");
2066 if (rc == ATA_DEFER_LINK)
2067 return SCSI_MLQUEUE_DEVICE_BUSY;
2069 return SCSI_MLQUEUE_HOST_BUSY;
2072 struct ata_scsi_args {
2073 struct ata_device *dev;
2075 struct scsi_cmnd *cmd;
2079 * ata_scsi_rbuf_get - Map response buffer.
2080 * @cmd: SCSI command containing buffer to be mapped.
2081 * @flags: unsigned long variable to store irq enable status
2082 * @copy_in: copy in from user buffer
2084 * Prepare buffer for simulated SCSI commands.
2087 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
2090 * Pointer to response buffer.
2092 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
2093 unsigned long *flags)
2095 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
2097 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
2099 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2100 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2101 return ata_scsi_rbuf;
2105 * ata_scsi_rbuf_put - Unmap response buffer.
2106 * @cmd: SCSI command containing buffer to be unmapped.
2107 * @copy_out: copy out result
2108 * @flags: @flags passed to ata_scsi_rbuf_get()
2110 * Returns rbuf buffer. The result is copied to @cmd's buffer if
2111 * @copy_back is true.
2114 * Unlocks ata_scsi_rbuf_lock.
2116 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
2117 unsigned long *flags)
2120 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2121 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2122 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
2126 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
2127 * @args: device IDENTIFY data / SCSI command of interest.
2128 * @actor: Callback hook for desired SCSI command simulator
2130 * Takes care of the hard work of simulating a SCSI command...
2131 * Mapping the response buffer, calling the command's handler,
2132 * and handling the handler's return value. This return value
2133 * indicates whether the handler wishes the SCSI command to be
2134 * completed successfully (0), or not (in which case cmd->result
2135 * and sense buffer are assumed to be set).
2138 * spin_lock_irqsave(host lock)
2140 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
2141 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
2145 struct scsi_cmnd *cmd = args->cmd;
2146 unsigned long flags;
2148 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
2149 rc = actor(args, rbuf);
2150 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
2153 cmd->result = SAM_STAT_GOOD;
2157 * ata_scsiop_inq_std - Simulate INQUIRY command
2158 * @args: device IDENTIFY data / SCSI command of interest.
2159 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2161 * Returns standard device identification data associated
2162 * with non-VPD INQUIRY command output.
2165 * spin_lock_irqsave(host lock)
2167 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
2169 const u8 versions[] = {
2171 0x60, /* SAM-3 (no version claimed) */
2174 0x20, /* SBC-2 (no version claimed) */
2177 0x00 /* SPC-3 (no version claimed) */
2179 const u8 versions_zbc[] = {
2181 0xA0, /* SAM-5 (no version claimed) */
2184 0x00, /* SBC-4 (no version claimed) */
2187 0xC0, /* SPC-5 (no version claimed) */
2196 0x5, /* claim SPC-3 version compatibility */
2206 /* set scsi removable (RMB) bit per ata bit, or if the
2207 * AHCI port says it's external (Hotplug-capable, eSATA).
2209 if (ata_id_removable(args->id) ||
2210 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL))
2213 if (args->dev->class == ATA_DEV_ZAC) {
2215 hdr[2] = 0x7; /* claim SPC-5 version compatibility */
2218 memcpy(rbuf, hdr, sizeof(hdr));
2219 memcpy(&rbuf[8], "ATA ", 8);
2220 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
2222 /* From SAT, use last 2 words from fw rev unless they are spaces */
2223 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
2224 if (strncmp(&rbuf[32], " ", 4) == 0)
2225 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2227 if (rbuf[32] == 0 || rbuf[32] == ' ')
2228 memcpy(&rbuf[32], "n/a ", 4);
2230 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC)
2231 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc));
2233 memcpy(rbuf + 58, versions, sizeof(versions));
2239 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2240 * @args: device IDENTIFY data / SCSI command of interest.
2241 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2243 * Returns list of inquiry VPD pages available.
2246 * spin_lock_irqsave(host lock)
2248 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
2251 const u8 pages[] = {
2252 0x00, /* page 0x00, this page */
2253 0x80, /* page 0x80, unit serial no page */
2254 0x83, /* page 0x83, device ident page */
2255 0x89, /* page 0x89, ata info page */
2256 0xb0, /* page 0xb0, block limits page */
2257 0xb1, /* page 0xb1, block device characteristics page */
2258 0xb2, /* page 0xb2, thin provisioning page */
2259 0xb6, /* page 0xb6, zoned block device characteristics */
2262 num_pages = sizeof(pages);
2263 if (!(args->dev->flags & ATA_DFLAG_ZAC))
2265 rbuf[3] = num_pages; /* number of supported VPD pages */
2266 memcpy(rbuf + 4, pages, num_pages);
2271 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2272 * @args: device IDENTIFY data / SCSI command of interest.
2273 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2275 * Returns ATA device serial number.
2278 * spin_lock_irqsave(host lock)
2280 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2284 0x80, /* this page code */
2286 ATA_ID_SERNO_LEN, /* page len */
2289 memcpy(rbuf, hdr, sizeof(hdr));
2290 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2291 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2296 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2297 * @args: device IDENTIFY data / SCSI command of interest.
2298 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2300 * Yields two logical unit device identification designators:
2301 * - vendor specific ASCII containing the ATA serial number
2302 * - SAT defined "t10 vendor id based" containing ASCII vendor
2303 * name ("ATA "), model and serial numbers.
2306 * spin_lock_irqsave(host lock)
2308 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2310 const int sat_model_serial_desc_len = 68;
2313 rbuf[1] = 0x83; /* this page code */
2316 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2318 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2320 ata_id_string(args->id, (unsigned char *) rbuf + num,
2321 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2322 num += ATA_ID_SERNO_LEN;
2324 /* SAT defined lu model and serial numbers descriptor */
2325 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2328 rbuf[num + 3] = sat_model_serial_desc_len;
2330 memcpy(rbuf + num, "ATA ", 8);
2332 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2334 num += ATA_ID_PROD_LEN;
2335 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2337 num += ATA_ID_SERNO_LEN;
2339 if (ata_id_has_wwn(args->id)) {
2340 /* SAT defined lu world wide name */
2341 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2344 rbuf[num + 3] = ATA_ID_WWN_LEN;
2346 ata_id_string(args->id, (unsigned char *) rbuf + num,
2347 ATA_ID_WWN, ATA_ID_WWN_LEN);
2348 num += ATA_ID_WWN_LEN;
2350 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2355 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2356 * @args: device IDENTIFY data / SCSI command of interest.
2357 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2359 * Yields SAT-specified ATA VPD page.
2362 * spin_lock_irqsave(host lock)
2364 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2366 struct ata_taskfile tf;
2368 memset(&tf, 0, sizeof(tf));
2370 rbuf[1] = 0x89; /* our page code */
2371 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2372 rbuf[3] = (0x238 & 0xff);
2374 memcpy(&rbuf[8], "linux ", 8);
2375 memcpy(&rbuf[16], "libata ", 16);
2376 memcpy(&rbuf[32], DRV_VERSION, 4);
2378 /* we don't store the ATA device signature, so we fake it */
2380 tf.command = ATA_DRDY; /* really, this is Status reg */
2384 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2385 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2387 rbuf[56] = ATA_CMD_ID_ATA;
2389 memcpy(&rbuf[60], &args->id[0], 512);
2393 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2395 struct ata_device *dev = args->dev;
2399 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2402 * Optimal transfer length granularity.
2404 * This is always one physical block, but for disks with a smaller
2405 * logical than physical sector size we need to figure out what the
2408 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2409 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2412 * Optimal unmap granularity.
2414 * The ATA spec doesn't even know about a granularity or alignment
2415 * for the TRIM command. We can leave away most of the unmap related
2416 * VPD page entries, but we have specifify a granularity to signal
2417 * that we support some form of unmap - in thise case via WRITE SAME
2418 * with the unmap bit set.
2420 if (ata_id_has_trim(args->id)) {
2421 u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM;
2423 if (dev->horkage & ATA_HORKAGE_MAX_TRIM_128M)
2424 max_blocks = 128 << (20 - SECTOR_SHIFT);
2426 put_unaligned_be64(max_blocks, &rbuf[36]);
2427 put_unaligned_be32(1, &rbuf[28]);
2433 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2435 int form_factor = ata_id_form_factor(args->id);
2436 int media_rotation_rate = ata_id_rotation_rate(args->id);
2437 u8 zoned = ata_id_zoned_cap(args->id);
2441 rbuf[4] = media_rotation_rate >> 8;
2442 rbuf[5] = media_rotation_rate;
2443 rbuf[7] = form_factor;
2445 rbuf[8] = (zoned << 4);
2450 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2452 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2455 rbuf[5] = 1 << 6; /* TPWS */
2460 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf)
2463 * zbc-r05 SCSI Zoned Block device characteristics VPD page
2469 * URSWRZ bit is only meaningful for host-managed ZAC drives
2471 if (args->dev->zac_zoned_cap & 1)
2473 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]);
2474 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]);
2475 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]);
2481 * modecpy - Prepare response for MODE SENSE
2482 * @dest: output buffer
2483 * @src: data being copied
2484 * @n: length of mode page
2485 * @changeable: whether changeable parameters are requested
2487 * Generate a generic MODE SENSE page for either current or changeable
2493 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2496 memcpy(dest, src, 2);
2497 memset(dest + 2, 0, n - 2);
2499 memcpy(dest, src, n);
2504 * ata_msense_caching - Simulate MODE SENSE caching info page
2505 * @id: device IDENTIFY data
2506 * @buf: output buffer
2507 * @changeable: whether changeable parameters are requested
2509 * Generate a caching info page, which conditionally indicates
2510 * write caching to the SCSI layer, depending on device
2516 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2518 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2520 buf[2] |= (1 << 2); /* ata_mselect_caching() */
2522 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */
2523 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */
2525 return sizeof(def_cache_mpage);
2529 * ata_msense_control - Simulate MODE SENSE control mode page
2530 * @dev: ATA device of interest
2531 * @buf: output buffer
2532 * @changeable: whether changeable parameters are requested
2534 * Generate a generic MODE SENSE control mode page.
2539 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf,
2542 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2544 buf[2] |= (1 << 2); /* ata_mselect_control() */
2546 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
2548 buf[2] |= (d_sense << 2); /* descriptor format sense data */
2550 return sizeof(def_control_mpage);
2554 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2555 * @buf: output buffer
2556 * @changeable: whether changeable parameters are requested
2558 * Generate a generic MODE SENSE r/w error recovery page.
2563 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2565 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2567 return sizeof(def_rw_recovery_mpage);
2571 * We can turn this into a real blacklist if it's needed, for now just
2572 * blacklist any Maxtor BANC1G10 revision firmware
2574 static int ata_dev_supports_fua(u16 *id)
2576 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2580 if (!ata_id_has_fua(id))
2583 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2584 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2586 if (strcmp(model, "Maxtor"))
2588 if (strcmp(fw, "BANC1G10"))
2591 return 0; /* blacklisted */
2595 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2596 * @args: device IDENTIFY data / SCSI command of interest.
2597 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2599 * Simulate MODE SENSE commands. Assume this is invoked for direct
2600 * access devices (e.g. disks) only. There should be no block
2601 * descriptor for other device types.
2604 * spin_lock_irqsave(host lock)
2606 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2608 struct ata_device *dev = args->dev;
2609 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2610 const u8 sat_blk_desc[] = {
2611 0, 0, 0, 0, /* number of blocks: sat unspecified */
2613 0, 0x2, 0x0 /* block length: 512 bytes */
2616 unsigned int ebd, page_control, six_byte;
2617 u8 dpofua, bp = 0xff;
2622 six_byte = (scsicmd[0] == MODE_SENSE);
2623 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2625 * LLBA bit in msense(10) ignored (compliant)
2628 page_control = scsicmd[2] >> 6;
2629 switch (page_control) {
2630 case 0: /* current */
2631 case 1: /* changeable */
2632 case 2: /* defaults */
2633 break; /* supported */
2635 goto saving_not_supp;
2643 p += 4 + (ebd ? 8 : 0);
2645 p += 8 + (ebd ? 8 : 0);
2647 pg = scsicmd[2] & 0x3f;
2650 * No mode subpages supported (yet) but asking for _all_
2651 * subpages may be valid
2653 if (spg && (spg != ALL_SUB_MPAGES)) {
2659 case RW_RECOVERY_MPAGE:
2660 p += ata_msense_rw_recovery(p, page_control == 1);
2664 p += ata_msense_caching(args->id, p, page_control == 1);
2668 p += ata_msense_control(args->dev, p, page_control == 1);
2672 p += ata_msense_rw_recovery(p, page_control == 1);
2673 p += ata_msense_caching(args->id, p, page_control == 1);
2674 p += ata_msense_control(args->dev, p, page_control == 1);
2677 default: /* invalid page code */
2683 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2684 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2688 rbuf[0] = p - rbuf - 1;
2691 rbuf[3] = sizeof(sat_blk_desc);
2692 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2695 unsigned int output_len = p - rbuf - 2;
2697 rbuf[0] = output_len >> 8;
2698 rbuf[1] = output_len;
2701 rbuf[7] = sizeof(sat_blk_desc);
2702 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2708 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp);
2712 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2713 /* "Saving parameters not supported" */
2718 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2719 * @args: device IDENTIFY data / SCSI command of interest.
2720 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2722 * Simulate READ CAPACITY commands.
2727 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2729 struct ata_device *dev = args->dev;
2730 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2731 u32 sector_size; /* physical sector size in bytes */
2735 sector_size = ata_id_logical_sector_size(dev->id);
2736 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2737 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2741 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2742 if (last_lba >= 0xffffffffULL)
2743 last_lba = 0xffffffff;
2745 /* sector count, 32-bit */
2746 rbuf[0] = last_lba >> (8 * 3);
2747 rbuf[1] = last_lba >> (8 * 2);
2748 rbuf[2] = last_lba >> (8 * 1);
2752 rbuf[4] = sector_size >> (8 * 3);
2753 rbuf[5] = sector_size >> (8 * 2);
2754 rbuf[6] = sector_size >> (8 * 1);
2755 rbuf[7] = sector_size;
2757 /* sector count, 64-bit */
2758 rbuf[0] = last_lba >> (8 * 7);
2759 rbuf[1] = last_lba >> (8 * 6);
2760 rbuf[2] = last_lba >> (8 * 5);
2761 rbuf[3] = last_lba >> (8 * 4);
2762 rbuf[4] = last_lba >> (8 * 3);
2763 rbuf[5] = last_lba >> (8 * 2);
2764 rbuf[6] = last_lba >> (8 * 1);
2768 rbuf[ 8] = sector_size >> (8 * 3);
2769 rbuf[ 9] = sector_size >> (8 * 2);
2770 rbuf[10] = sector_size >> (8 * 1);
2771 rbuf[11] = sector_size;
2774 rbuf[13] = log2_per_phys;
2775 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2776 rbuf[15] = lowest_aligned;
2778 if (ata_id_has_trim(args->id) &&
2779 !(dev->horkage & ATA_HORKAGE_NOTRIM)) {
2780 rbuf[14] |= 0x80; /* LBPME */
2782 if (ata_id_has_zero_after_trim(args->id) &&
2783 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) {
2784 ata_dev_info(dev, "Enabling discard_zeroes_data\n");
2785 rbuf[14] |= 0x40; /* LBPRZ */
2788 if (ata_id_zoned_cap(args->id) ||
2789 args->dev->class == ATA_DEV_ZAC)
2790 rbuf[12] = (1 << 4); /* RC_BASIS */
2796 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2797 * @args: device IDENTIFY data / SCSI command of interest.
2798 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2800 * Simulate REPORT LUNS command.
2803 * spin_lock_irqsave(host lock)
2805 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2808 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2813 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2815 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2816 /* FIXME: not quite right; we don't want the
2817 * translation of taskfile registers into
2818 * a sense descriptors, since that's only
2819 * correct for ATA, not ATAPI
2821 ata_gen_passthru_sense(qc);
2827 /* is it pointless to prefer PIO for "safety reasons"? */
2828 static inline int ata_pio_use_silly(struct ata_port *ap)
2830 return (ap->flags & ATA_FLAG_PIO_DMA);
2833 static void atapi_request_sense(struct ata_queued_cmd *qc)
2835 struct ata_port *ap = qc->ap;
2836 struct scsi_cmnd *cmd = qc->scsicmd;
2838 DPRINTK("ATAPI request sense\n");
2840 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2842 #ifdef CONFIG_ATA_SFF
2843 if (ap->ops->sff_tf_read)
2844 ap->ops->sff_tf_read(ap, &qc->tf);
2847 /* fill these in, for the case where they are -not- overwritten */
2848 cmd->sense_buffer[0] = 0x70;
2849 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2853 /* setup sg table and init transfer direction */
2854 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2855 ata_sg_init(qc, &qc->sgent, 1);
2856 qc->dma_dir = DMA_FROM_DEVICE;
2858 memset(&qc->cdb, 0, qc->dev->cdb_len);
2859 qc->cdb[0] = REQUEST_SENSE;
2860 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2862 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2863 qc->tf.command = ATA_CMD_PACKET;
2865 if (ata_pio_use_silly(ap)) {
2866 qc->tf.protocol = ATAPI_PROT_DMA;
2867 qc->tf.feature |= ATAPI_PKT_DMA;
2869 qc->tf.protocol = ATAPI_PROT_PIO;
2870 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2873 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2875 qc->complete_fn = atapi_sense_complete;
2883 * ATAPI devices typically report zero for their SCSI version, and sometimes
2884 * deviate from the spec WRT response data format. If SCSI version is
2885 * reported as zero like normal, then we make the following fixups:
2886 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a
2888 * 2) Ensure response data format / ATAPI information are always correct.
2890 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd)
2894 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2899 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2902 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2904 struct scsi_cmnd *cmd = qc->scsicmd;
2905 unsigned int err_mask = qc->err_mask;
2907 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2909 /* handle completion from new EH */
2910 if (unlikely(qc->ap->ops->error_handler &&
2911 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2913 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2914 /* FIXME: not quite right; we don't want the
2915 * translation of taskfile registers into a
2916 * sense descriptors, since that's only
2917 * correct for ATA, not ATAPI
2919 ata_gen_passthru_sense(qc);
2922 /* SCSI EH automatically locks door if sdev->locked is
2923 * set. Sometimes door lock request continues to
2924 * fail, for example, when no media is present. This
2925 * creates a loop - SCSI EH issues door lock which
2926 * fails and gets invoked again to acquire sense data
2927 * for the failed command.
2929 * If door lock fails, always clear sdev->locked to
2930 * avoid this infinite loop.
2932 * This may happen before SCSI scan is complete. Make
2933 * sure qc->dev->sdev isn't NULL before dereferencing.
2935 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2936 qc->dev->sdev->locked = 0;
2938 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2943 /* successful completion or old EH failure path */
2944 if (unlikely(err_mask & AC_ERR_DEV)) {
2945 cmd->result = SAM_STAT_CHECK_CONDITION;
2946 atapi_request_sense(qc);
2948 } else if (unlikely(err_mask)) {
2949 /* FIXME: not quite right; we don't want the
2950 * translation of taskfile registers into
2951 * a sense descriptors, since that's only
2952 * correct for ATA, not ATAPI
2954 ata_gen_passthru_sense(qc);
2956 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0)
2957 atapi_fixup_inquiry(cmd);
2958 cmd->result = SAM_STAT_GOOD;
2964 * atapi_xlat - Initialize PACKET taskfile
2965 * @qc: command structure to be initialized
2968 * spin_lock_irqsave(host lock)
2971 * Zero on success, non-zero on failure.
2973 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2975 struct scsi_cmnd *scmd = qc->scsicmd;
2976 struct ata_device *dev = qc->dev;
2977 int nodata = (scmd->sc_data_direction == DMA_NONE);
2978 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2979 unsigned int nbytes;
2981 memset(qc->cdb, 0, dev->cdb_len);
2982 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2984 qc->complete_fn = atapi_qc_complete;
2986 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2987 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2988 qc->tf.flags |= ATA_TFLAG_WRITE;
2989 DPRINTK("direction: write\n");
2992 qc->tf.command = ATA_CMD_PACKET;
2993 ata_qc_set_pc_nbytes(qc);
2995 /* check whether ATAPI DMA is safe */
2996 if (!nodata && !using_pio && atapi_check_dma(qc))
2999 /* Some controller variants snoop this value for Packet
3000 * transfers to do state machine and FIFO management. Thus we
3001 * want to set it properly, and for DMA where it is
3002 * effectively meaningless.
3004 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
3006 /* Most ATAPI devices which honor transfer chunk size don't
3007 * behave according to the spec when odd chunk size which
3008 * matches the transfer length is specified. If the number of
3009 * bytes to transfer is 2n+1. According to the spec, what
3010 * should happen is to indicate that 2n+1 is going to be
3011 * transferred and transfer 2n+2 bytes where the last byte is
3014 * In practice, this doesn't happen. ATAPI devices first
3015 * indicate and transfer 2n bytes and then indicate and
3016 * transfer 2 bytes where the last byte is padding.
3018 * This inconsistency confuses several controllers which
3019 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
3020 * These controllers use actual number of transferred bytes to
3021 * update DMA poitner and transfer of 4n+2 bytes make those
3022 * controller push DMA pointer by 4n+4 bytes because SATA data
3023 * FISes are aligned to 4 bytes. This causes data corruption
3024 * and buffer overrun.
3026 * Always setting nbytes to even number solves this problem
3027 * because then ATAPI devices don't have to split data at 2n
3033 qc->tf.lbam = (nbytes & 0xFF);
3034 qc->tf.lbah = (nbytes >> 8);
3037 qc->tf.protocol = ATAPI_PROT_NODATA;
3039 qc->tf.protocol = ATAPI_PROT_PIO;
3042 qc->tf.protocol = ATAPI_PROT_DMA;
3043 qc->tf.feature |= ATAPI_PKT_DMA;
3045 if ((dev->flags & ATA_DFLAG_DMADIR) &&
3046 (scmd->sc_data_direction != DMA_TO_DEVICE))
3047 /* some SATA bridges need us to indicate data xfer direction */
3048 qc->tf.feature |= ATAPI_DMADIR;
3052 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
3053 as ATAPI tape drives don't get this right otherwise */
3057 static struct ata_device *ata_find_dev(struct ata_port *ap, unsigned int devno)
3060 * For the non-PMP case, ata_link_max_devices() returns 1 (SATA case),
3061 * or 2 (IDE master + slave case). However, the former case includes
3062 * libsas hosted devices which are numbered per scsi host, leading
3063 * to devno potentially being larger than 0 but with each struct
3064 * ata_device having its own struct ata_port and struct ata_link.
3065 * To accommodate these, ignore devno and always use device number 0.
3067 if (likely(!sata_pmp_attached(ap))) {
3068 int link_max_devices = ata_link_max_devices(&ap->link);
3070 if (link_max_devices == 1)
3071 return &ap->link.device[0];
3073 if (devno < link_max_devices)
3074 return &ap->link.device[devno];
3080 * For PMP-attached devices, the device number corresponds to C
3081 * (channel) of SCSI [H:C:I:L], indicating the port pmp link
3084 if (devno < ap->nr_pmp_links)
3085 return &ap->pmp_link[devno].device[0];
3090 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
3091 const struct scsi_device *scsidev)
3095 /* skip commands not addressed to targets we simulate */
3096 if (!sata_pmp_attached(ap)) {
3097 if (unlikely(scsidev->channel || scsidev->lun))
3099 devno = scsidev->id;
3101 if (unlikely(scsidev->id || scsidev->lun))
3103 devno = scsidev->channel;
3106 return ata_find_dev(ap, devno);
3110 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
3111 * @ap: ATA port to which the device is attached
3112 * @scsidev: SCSI device from which we derive the ATA device
3114 * Given various information provided in struct scsi_cmnd,
3115 * map that onto an ATA bus, and using that mapping
3116 * determine which ata_device is associated with the
3117 * SCSI command to be sent.
3120 * spin_lock_irqsave(host lock)
3123 * Associated ATA device, or %NULL if not found.
3125 static struct ata_device *
3126 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
3128 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
3130 if (unlikely(!dev || !ata_dev_enabled(dev)))
3137 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
3138 * @byte1: Byte 1 from pass-thru CDB.
3141 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
3144 ata_scsi_map_proto(u8 byte1)
3146 switch((byte1 & 0x1e) >> 1) {
3147 case 3: /* Non-data */
3148 return ATA_PROT_NODATA;
3151 case 10: /* UDMA Data-in */
3152 case 11: /* UDMA Data-Out */
3153 return ATA_PROT_DMA;
3155 case 4: /* PIO Data-in */
3156 case 5: /* PIO Data-out */
3157 return ATA_PROT_PIO;
3159 case 12: /* FPDMA */
3160 return ATA_PROT_NCQ;
3162 case 0: /* Hard Reset */
3164 case 8: /* Device Diagnostic */
3165 case 9: /* Device Reset */
3166 case 7: /* DMA Queued */
3167 case 15: /* Return Response Info */
3168 default: /* Reserved */
3172 return ATA_PROT_UNKNOWN;
3176 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
3177 * @qc: command structure to be initialized
3179 * Handles either 12, 16, or 32-byte versions of the CDB.
3182 * Zero on success, non-zero on failure.
3184 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
3186 struct ata_taskfile *tf = &(qc->tf);
3187 struct scsi_cmnd *scmd = qc->scsicmd;
3188 struct ata_device *dev = qc->dev;
3189 const u8 *cdb = scmd->cmnd;
3193 /* 7Fh variable length cmd means a ata pass-thru(32) */
3194 if (cdb[0] == VARIABLE_LENGTH_CMD)
3197 tf->protocol = ata_scsi_map_proto(cdb[1 + cdb_offset]);
3198 if (tf->protocol == ATA_PROT_UNKNOWN) {
3203 if ((cdb[2 + cdb_offset] & 0x3) == 0) {
3205 * When T_LENGTH is zero (No data is transferred), dir should
3208 if (scmd->sc_data_direction != DMA_NONE) {
3209 fp = 2 + cdb_offset;
3213 if (ata_is_ncq(tf->protocol))
3214 tf->protocol = ATA_PROT_NCQ_NODATA;
3218 tf->flags |= ATA_TFLAG_LBA;
3221 * 12 and 16 byte CDBs use different offsets to
3222 * provide the various register values.
3224 if (cdb[0] == ATA_16) {
3226 * 16-byte CDB - may contain extended commands.
3228 * If that is the case, copy the upper byte register values.
3230 if (cdb[1] & 0x01) {
3231 tf->hob_feature = cdb[3];
3232 tf->hob_nsect = cdb[5];
3233 tf->hob_lbal = cdb[7];
3234 tf->hob_lbam = cdb[9];
3235 tf->hob_lbah = cdb[11];
3236 tf->flags |= ATA_TFLAG_LBA48;
3238 tf->flags &= ~ATA_TFLAG_LBA48;
3241 * Always copy low byte, device and command registers.
3243 tf->feature = cdb[4];
3248 tf->device = cdb[13];
3249 tf->command = cdb[14];
3250 } else if (cdb[0] == ATA_12) {
3252 * 12-byte CDB - incapable of extended commands.
3254 tf->flags &= ~ATA_TFLAG_LBA48;
3256 tf->feature = cdb[3];
3261 tf->device = cdb[8];
3262 tf->command = cdb[9];
3265 * 32-byte CDB - may contain extended command fields.
3267 * If that is the case, copy the upper byte register values.
3269 if (cdb[10] & 0x01) {
3270 tf->hob_feature = cdb[20];
3271 tf->hob_nsect = cdb[22];
3272 tf->hob_lbal = cdb[16];
3273 tf->hob_lbam = cdb[15];
3274 tf->hob_lbah = cdb[14];
3275 tf->flags |= ATA_TFLAG_LBA48;
3277 tf->flags &= ~ATA_TFLAG_LBA48;
3279 tf->feature = cdb[21];
3280 tf->nsect = cdb[23];
3284 tf->device = cdb[24];
3285 tf->command = cdb[25];
3286 tf->auxiliary = get_unaligned_be32(&cdb[28]);
3289 /* For NCQ commands copy the tag value */
3290 if (ata_is_ncq(tf->protocol))
3291 tf->nsect = qc->tag << 3;
3293 /* enforce correct master/slave bit */
3294 tf->device = dev->devno ?
3295 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
3297 switch (tf->command) {
3298 /* READ/WRITE LONG use a non-standard sect_size */
3299 case ATA_CMD_READ_LONG:
3300 case ATA_CMD_READ_LONG_ONCE:
3301 case ATA_CMD_WRITE_LONG:
3302 case ATA_CMD_WRITE_LONG_ONCE:
3303 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) {
3307 qc->sect_size = scsi_bufflen(scmd);
3310 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3311 case ATA_CMD_CFA_WRITE_NE:
3312 case ATA_CMD_CFA_TRANS_SECT:
3313 case ATA_CMD_CFA_WRITE_MULT_NE:
3314 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3316 case ATA_CMD_READ_EXT:
3317 case ATA_CMD_READ_QUEUED:
3318 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3319 case ATA_CMD_FPDMA_READ:
3320 case ATA_CMD_READ_MULTI:
3321 case ATA_CMD_READ_MULTI_EXT:
3322 case ATA_CMD_PIO_READ:
3323 case ATA_CMD_PIO_READ_EXT:
3324 case ATA_CMD_READ_STREAM_DMA_EXT:
3325 case ATA_CMD_READ_STREAM_EXT:
3326 case ATA_CMD_VERIFY:
3327 case ATA_CMD_VERIFY_EXT:
3329 case ATA_CMD_WRITE_EXT:
3330 case ATA_CMD_WRITE_FUA_EXT:
3331 case ATA_CMD_WRITE_QUEUED:
3332 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
3333 case ATA_CMD_FPDMA_WRITE:
3334 case ATA_CMD_WRITE_MULTI:
3335 case ATA_CMD_WRITE_MULTI_EXT:
3336 case ATA_CMD_WRITE_MULTI_FUA_EXT:
3337 case ATA_CMD_PIO_WRITE:
3338 case ATA_CMD_PIO_WRITE_EXT:
3339 case ATA_CMD_WRITE_STREAM_DMA_EXT:
3340 case ATA_CMD_WRITE_STREAM_EXT:
3341 qc->sect_size = scmd->device->sector_size;
3344 /* Everything else uses 512 byte "sectors" */
3346 qc->sect_size = ATA_SECT_SIZE;
3350 * Set flags so that all registers will be written, pass on
3351 * write indication (used for PIO/DMA setup), result TF is
3352 * copied back and we don't whine too much about its failure.
3354 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3355 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3356 tf->flags |= ATA_TFLAG_WRITE;
3358 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3361 * Set transfer length.
3363 * TODO: find out if we need to do more here to
3364 * cover scatter/gather case.
3366 ata_qc_set_pc_nbytes(qc);
3368 /* We may not issue DMA commands if no DMA mode is set */
3369 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) {
3374 /* We may not issue NCQ commands to devices not supporting NCQ */
3375 if (ata_is_ncq(tf->protocol) && !ata_ncq_enabled(dev)) {
3380 /* sanity check for pio multi commands */
3381 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) {
3386 if (is_multi_taskfile(tf)) {
3387 unsigned int multi_count = 1 << (cdb[1] >> 5);
3389 /* compare the passed through multi_count
3390 * with the cached multi_count of libata
3392 if (multi_count != dev->multi_count)
3393 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3398 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3399 * SET_FEATURES - XFER MODE must be preceded/succeeded
3400 * by an update to hardware-specific registers for each
3401 * controller (i.e. the reason for ->set_piomode(),
3402 * ->set_dmamode(), and ->post_set_mode() hooks).
3404 if (tf->command == ATA_CMD_SET_FEATURES &&
3405 tf->feature == SETFEATURES_XFER) {
3406 fp = (cdb[0] == ATA_16) ? 4 : 3;
3411 * Filter TPM commands by default. These provide an
3412 * essentially uncontrolled encrypted "back door" between
3413 * applications and the disk. Set libata.allow_tpm=1 if you
3414 * have a real reason for wanting to use them. This ensures
3415 * that installed software cannot easily mess stuff up without
3416 * user intent. DVR type users will probably ship with this enabled
3417 * for movie content management.
3419 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3420 * for this and should do in future but that it is not sufficient as
3421 * DCS is an optional feature set. Thus we also do the software filter
3422 * so that we comply with the TC consortium stated goal that the user
3423 * can turn off TC features of their system.
3425 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) {
3426 fp = (cdb[0] == ATA_16) ? 14 : 9;
3433 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff);
3438 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim
3439 * @cmd: SCSI command being translated
3440 * @trmax: Maximum number of entries that will fit in sector_size bytes.
3441 * @sector: Starting sector
3442 * @count: Total Range of request in logical sectors
3444 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted
3447 * Upto 64 entries of the format:
3448 * 63:48 Range Length
3451 * Range Length of 0 is ignored.
3452 * LBA's should be sorted order and not overlap.
3454 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET
3456 * Return: Number of bytes copied into sglist.
3458 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax,
3459 u64 sector, u32 count)
3461 struct scsi_device *sdp = cmd->device;
3462 size_t len = sdp->sector_size;
3466 unsigned long flags;
3468 WARN_ON(len > ATA_SCSI_RBUF_SIZE);
3470 if (len > ATA_SCSI_RBUF_SIZE)
3471 len = ATA_SCSI_RBUF_SIZE;
3473 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
3474 buf = ((void *)ata_scsi_rbuf);
3475 memset(buf, 0, len);
3477 u64 entry = sector |
3478 ((u64)(count > 0xffff ? 0xffff : count) << 48);
3479 buf[i++] = __cpu_to_le64(entry);
3480 if (count <= 0xffff)
3485 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len);
3486 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
3492 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same
3493 * @qc: Command to be translated
3495 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or
3496 * an SCT Write Same command.
3497 * Based on WRITE SAME has the UNMAP flag:
3499 * - When set translate to DSM TRIM
3500 * - When clear translate to SCT Write Same
3502 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3504 struct ata_taskfile *tf = &qc->tf;
3505 struct scsi_cmnd *scmd = qc->scsicmd;
3506 struct scsi_device *sdp = scmd->device;
3507 size_t len = sdp->sector_size;
3508 struct ata_device *dev = qc->dev;
3509 const u8 *cdb = scmd->cmnd;
3512 const u32 trmax = len >> 3;
3516 u8 unmap = cdb[1] & 0x8;
3518 /* we may not issue DMA commands if no DMA mode is set */
3519 if (unlikely(!dev->dma_mode))
3520 goto invalid_opcode;
3523 * We only allow sending this command through the block layer,
3524 * as it modifies the DATA OUT buffer, which would corrupt user
3525 * memory for SG_IO commands.
3527 if (unlikely(blk_rq_is_passthrough(scmd->request)))
3528 goto invalid_opcode;
3530 if (unlikely(scmd->cmd_len < 16)) {
3534 scsi_16_lba_len(cdb, &block, &n_block);
3537 (dev->horkage & ATA_HORKAGE_NOTRIM) ||
3538 !ata_id_has_trim(dev->id)) {
3543 /* If the request is too large the cmd is invalid */
3544 if (n_block > 0xffff * trmax) {
3550 * WRITE SAME always has a sector sized buffer as payload, this
3551 * should never be a multiple entry S/G list.
3553 if (!scsi_sg_count(scmd))
3554 goto invalid_param_len;
3557 * size must match sector size in bytes
3558 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count)
3559 * is defined as number of 512 byte blocks to be transferred.
3562 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block);
3564 goto invalid_param_len;
3566 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3567 /* Newer devices support queued TRIM commands */
3568 tf->protocol = ATA_PROT_NCQ;
3569 tf->command = ATA_CMD_FPDMA_SEND;
3570 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3571 tf->nsect = qc->tag << 3;
3572 tf->hob_feature = (size / 512) >> 8;
3573 tf->feature = size / 512;
3577 tf->protocol = ATA_PROT_DMA;
3578 tf->hob_feature = 0;
3579 tf->feature = ATA_DSM_TRIM;
3580 tf->hob_nsect = (size / 512) >> 8;
3581 tf->nsect = size / 512;
3582 tf->command = ATA_CMD_DSM;
3585 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3588 ata_qc_set_pc_nbytes(qc);
3593 ata_scsi_set_invalid_field(dev, scmd, fp, bp);
3596 /* "Parameter list length error" */
3597 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3600 /* "Invalid command operation code" */
3601 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0);
3606 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN
3607 * @args: device MAINTENANCE_IN data / SCSI command of interest.
3608 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
3610 * Yields a subset to satisfy scsi_report_opcode()
3613 * spin_lock_irqsave(host lock)
3615 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf)
3617 struct ata_device *dev = args->dev;
3618 u8 *cdb = args->cmd->cmnd;
3620 unsigned int err = 0;
3623 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]);
3632 case SERVICE_ACTION_IN_16:
3635 case SYNCHRONIZE_CACHE:
3639 case TEST_UNIT_READY:
3640 case SEND_DIAGNOSTIC:
3641 case MAINTENANCE_IN:
3653 case MODE_SELECT_10:
3659 if (ata_id_zoned_cap(dev->id) ||
3660 dev->class == ATA_DEV_ZAC)
3663 case SECURITY_PROTOCOL_IN:
3664 case SECURITY_PROTOCOL_OUT:
3665 if (dev->flags & ATA_DFLAG_TRUSTED)
3672 rbuf[1] = supported; /* supported */
3677 * ata_scsi_report_zones_complete - convert ATA output
3678 * @qc: command structure returning the data
3680 * Convert T-13 little-endian field representation into
3681 * T-10 big-endian field representation.
3684 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc)
3686 struct scsi_cmnd *scmd = qc->scsicmd;
3687 struct sg_mapping_iter miter;
3688 unsigned long flags;
3689 unsigned int bytes = 0;
3691 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd),
3692 SG_MITER_TO_SG | SG_MITER_ATOMIC);
3694 local_irq_save(flags);
3695 while (sg_miter_next(&miter)) {
3696 unsigned int offset = 0;
3701 u64 max_lba, opt_lba;
3704 /* Swizzle header */
3706 list_length = get_unaligned_le32(&hdr[0]);
3707 same = get_unaligned_le16(&hdr[4]);
3708 max_lba = get_unaligned_le64(&hdr[8]);
3709 opt_lba = get_unaligned_le64(&hdr[16]);
3710 put_unaligned_be32(list_length, &hdr[0]);
3711 hdr[4] = same & 0xf;
3712 put_unaligned_be64(max_lba, &hdr[8]);
3713 put_unaligned_be64(opt_lba, &hdr[16]);
3717 while (offset < miter.length) {
3719 u8 cond, type, non_seq, reset;
3720 u64 size, start, wp;
3722 /* Swizzle zone descriptor */
3723 rec = miter.addr + offset;
3724 type = rec[0] & 0xf;
3725 cond = (rec[1] >> 4) & 0xf;
3726 non_seq = (rec[1] & 2);
3727 reset = (rec[1] & 1);
3728 size = get_unaligned_le64(&rec[8]);
3729 start = get_unaligned_le64(&rec[16]);
3730 wp = get_unaligned_le64(&rec[24]);
3732 rec[1] = (cond << 4) | non_seq | reset;
3733 put_unaligned_be64(size, &rec[8]);
3734 put_unaligned_be64(start, &rec[16]);
3735 put_unaligned_be64(wp, &rec[24]);
3736 WARN_ON(offset + 64 > miter.length);
3741 sg_miter_stop(&miter);
3742 local_irq_restore(flags);
3744 ata_scsi_qc_complete(qc);
3747 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc)
3749 struct ata_taskfile *tf = &qc->tf;
3750 struct scsi_cmnd *scmd = qc->scsicmd;
3751 const u8 *cdb = scmd->cmnd;
3752 u16 sect, fp = (u16)-1;
3753 u8 sa, options, bp = 0xff;
3757 if (unlikely(scmd->cmd_len < 16)) {
3758 ata_dev_warn(qc->dev, "invalid cdb length %d\n",
3763 scsi_16_lba_len(cdb, &block, &n_block);
3764 if (n_block != scsi_bufflen(scmd)) {
3765 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n",
3766 n_block, scsi_bufflen(scmd));
3767 goto invalid_param_len;
3770 if (sa != ZI_REPORT_ZONES) {
3771 ata_dev_warn(qc->dev, "invalid service action %d\n", sa);
3776 * ZAC allows only for transfers in 512 byte blocks,
3777 * and uses a 16 bit value for the transfer count.
3779 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) {
3780 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block);
3781 goto invalid_param_len;
3783 sect = n_block / 512;
3784 options = cdb[14] & 0xbf;
3786 if (ata_ncq_enabled(qc->dev) &&
3787 ata_fpdma_zac_mgmt_in_supported(qc->dev)) {
3788 tf->protocol = ATA_PROT_NCQ;
3789 tf->command = ATA_CMD_FPDMA_RECV;
3790 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f;
3791 tf->nsect = qc->tag << 3;
3792 tf->feature = sect & 0xff;
3793 tf->hob_feature = (sect >> 8) & 0xff;
3794 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8);
3796 tf->command = ATA_CMD_ZAC_MGMT_IN;
3797 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES;
3798 tf->protocol = ATA_PROT_DMA;
3799 tf->hob_feature = options;
3800 tf->hob_nsect = (sect >> 8) & 0xff;
3801 tf->nsect = sect & 0xff;
3803 tf->device = ATA_LBA;
3804 tf->lbah = (block >> 16) & 0xff;
3805 tf->lbam = (block >> 8) & 0xff;
3806 tf->lbal = block & 0xff;
3807 tf->hob_lbah = (block >> 40) & 0xff;
3808 tf->hob_lbam = (block >> 32) & 0xff;
3809 tf->hob_lbal = (block >> 24) & 0xff;
3811 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3812 qc->flags |= ATA_QCFLAG_RESULT_TF;
3814 ata_qc_set_pc_nbytes(qc);
3816 qc->complete_fn = ata_scsi_report_zones_complete;
3821 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
3825 /* "Parameter list length error" */
3826 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3830 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc)
3832 struct ata_taskfile *tf = &qc->tf;
3833 struct scsi_cmnd *scmd = qc->scsicmd;
3834 struct ata_device *dev = qc->dev;
3835 const u8 *cdb = scmd->cmnd;
3841 if (unlikely(scmd->cmd_len < 16)) {
3847 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) &&
3848 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) {
3853 scsi_16_lba_len(cdb, &block, &n_block);
3856 * ZAC MANAGEMENT OUT doesn't define any length
3858 goto invalid_param_len;
3861 all = cdb[14] & 0x1;
3864 * Ignore the block address (zone ID) as defined by ZBC.
3867 } else if (block >= dev->n_sectors) {
3869 * Block must be a valid zone ID (a zone start LBA).
3875 if (ata_ncq_enabled(qc->dev) &&
3876 ata_fpdma_zac_mgmt_out_supported(qc->dev)) {
3877 tf->protocol = ATA_PROT_NCQ_NODATA;
3878 tf->command = ATA_CMD_NCQ_NON_DATA;
3879 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT;
3880 tf->nsect = qc->tag << 3;
3881 tf->auxiliary = sa | ((u16)all << 8);
3883 tf->protocol = ATA_PROT_NODATA;
3884 tf->command = ATA_CMD_ZAC_MGMT_OUT;
3886 tf->hob_feature = all;
3888 tf->lbah = (block >> 16) & 0xff;
3889 tf->lbam = (block >> 8) & 0xff;
3890 tf->lbal = block & 0xff;
3891 tf->hob_lbah = (block >> 40) & 0xff;
3892 tf->hob_lbam = (block >> 32) & 0xff;
3893 tf->hob_lbal = (block >> 24) & 0xff;
3894 tf->device = ATA_LBA;
3895 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3900 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
3903 /* "Parameter list length error" */
3904 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3909 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3910 * @qc: Storage for translated ATA taskfile
3911 * @buf: input buffer
3912 * @len: number of valid bytes in the input buffer
3913 * @fp: out parameter for the failed field on error
3915 * Prepare a taskfile to modify caching information for the device.
3920 static int ata_mselect_caching(struct ata_queued_cmd *qc,
3921 const u8 *buf, int len, u16 *fp)
3923 struct ata_taskfile *tf = &qc->tf;
3924 struct ata_device *dev = qc->dev;
3925 u8 mpage[CACHE_MPAGE_LEN];
3930 * The first two bytes of def_cache_mpage are a header, so offsets
3931 * in mpage are off by 2 compared to buf. Same for len.
3934 if (len != CACHE_MPAGE_LEN - 2) {
3935 if (len < CACHE_MPAGE_LEN - 2)
3938 *fp = CACHE_MPAGE_LEN - 2;
3942 wce = buf[0] & (1 << 2);
3945 * Check that read-only bits are not modified.
3947 ata_msense_caching(dev->id, mpage, false);
3948 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) {
3951 if (mpage[i + 2] != buf[i]) {
3957 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3958 tf->protocol = ATA_PROT_NODATA;
3960 tf->command = ATA_CMD_SET_FEATURES;
3961 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3966 * ata_mselect_control - Simulate MODE SELECT for control page
3967 * @qc: Storage for translated ATA taskfile
3968 * @buf: input buffer
3969 * @len: number of valid bytes in the input buffer
3970 * @fp: out parameter for the failed field on error
3972 * Prepare a taskfile to modify caching information for the device.
3977 static int ata_mselect_control(struct ata_queued_cmd *qc,
3978 const u8 *buf, int len, u16 *fp)
3980 struct ata_device *dev = qc->dev;
3981 u8 mpage[CONTROL_MPAGE_LEN];
3986 * The first two bytes of def_control_mpage are a header, so offsets
3987 * in mpage are off by 2 compared to buf. Same for len.
3990 if (len != CONTROL_MPAGE_LEN - 2) {
3991 if (len < CONTROL_MPAGE_LEN - 2)
3994 *fp = CONTROL_MPAGE_LEN - 2;
3998 d_sense = buf[0] & (1 << 2);
4001 * Check that read-only bits are not modified.
4003 ata_msense_control(dev, mpage, false);
4004 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) {
4007 if (mpage[2 + i] != buf[i]) {
4012 if (d_sense & (1 << 2))
4013 dev->flags |= ATA_DFLAG_D_SENSE;
4015 dev->flags &= ~ATA_DFLAG_D_SENSE;
4020 * ata_scsi_mode_select_xlat - Simulate MODE SELECT 6, 10 commands
4021 * @qc: Storage for translated ATA taskfile
4023 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
4024 * Assume this is invoked for direct access devices (e.g. disks) only.
4025 * There should be no block descriptor for other device types.
4028 * spin_lock_irqsave(host lock)
4030 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
4032 struct scsi_cmnd *scmd = qc->scsicmd;
4033 const u8 *cdb = scmd->cmnd;
4035 unsigned six_byte, pg_len, hdr_len, bd_len;
4040 const u8 *p = buffer;
4044 six_byte = (cdb[0] == MODE_SELECT);
4046 if (scmd->cmd_len < 5) {
4054 if (scmd->cmd_len < 9) {
4059 len = (cdb[7] << 8) + cdb[8];
4063 /* We only support PF=1, SP=0. */
4064 if ((cdb[1] & 0x11) != 0x10) {
4066 bp = (cdb[1] & 0x01) ? 1 : 5;
4070 /* Test early for possible overrun. */
4071 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
4072 goto invalid_param_len;
4074 /* Move past header and block descriptors. */
4076 goto invalid_param_len;
4078 if (!sg_copy_to_buffer(scsi_sglist(scmd), scsi_sg_count(scmd),
4079 buffer, sizeof(buffer)))
4080 goto invalid_param_len;
4085 bd_len = (p[6] << 8) + p[7];
4090 goto invalid_param_len;
4091 if (bd_len != 0 && bd_len != 8) {
4092 fp = (six_byte) ? 3 : 6;
4093 fp += bd_len + hdr_len;
4102 /* Parse both possible formats for the mode page headers. */
4106 goto invalid_param_len;
4109 pg_len = (p[2] << 8) | p[3];
4114 goto invalid_param_len;
4123 * No mode subpages supported (yet) but asking for _all_
4124 * subpages may be valid
4126 if (spg && (spg != ALL_SUB_MPAGES)) {
4127 fp = (p[0] & 0x40) ? 1 : 0;
4128 fp += hdr_len + bd_len;
4132 goto invalid_param_len;
4136 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) {
4137 fp += hdr_len + bd_len;
4142 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) {
4143 fp += hdr_len + bd_len;
4146 goto skip; /* No ATA command to send */
4149 default: /* invalid page code */
4150 fp = bd_len + hdr_len;
4155 * Only one page has changeable data, so we only support setting one
4164 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
4168 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp);
4172 /* "Parameter list length error" */
4173 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
4177 scmd->result = SAM_STAT_GOOD;
4181 static u8 ata_scsi_trusted_op(u32 len, bool send, bool dma)
4184 return ATA_CMD_TRUSTED_NONDATA;
4186 return dma ? ATA_CMD_TRUSTED_SND_DMA : ATA_CMD_TRUSTED_SND;
4188 return dma ? ATA_CMD_TRUSTED_RCV_DMA : ATA_CMD_TRUSTED_RCV;
4191 static unsigned int ata_scsi_security_inout_xlat(struct ata_queued_cmd *qc)
4193 struct scsi_cmnd *scmd = qc->scsicmd;
4194 const u8 *cdb = scmd->cmnd;
4195 struct ata_taskfile *tf = &qc->tf;
4197 bool send = (cdb[0] == SECURITY_PROTOCOL_OUT);
4198 u16 spsp = get_unaligned_be16(&cdb[2]);
4199 u32 len = get_unaligned_be32(&cdb[6]);
4200 bool dma = !(qc->dev->flags & ATA_DFLAG_PIO);
4203 * We don't support the ATA "security" protocol.
4206 ata_scsi_set_invalid_field(qc->dev, scmd, 1, 0);
4210 if (cdb[4] & 7) { /* INC_512 */
4212 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0);
4216 if (len > 0x01fffe00) {
4217 ata_scsi_set_invalid_field(qc->dev, scmd, 6, 0);
4221 /* convert to the sector-based ATA addressing */
4222 len = (len + 511) / 512;
4225 tf->protocol = dma ? ATA_PROT_DMA : ATA_PROT_PIO;
4226 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR | ATA_TFLAG_LBA;
4228 tf->flags |= ATA_TFLAG_WRITE;
4229 tf->command = ata_scsi_trusted_op(len, send, dma);
4231 tf->lbam = spsp & 0xff;
4232 tf->lbah = spsp >> 8;
4235 tf->nsect = len & 0xff;
4236 tf->lbal = len >> 8;
4239 tf->lbah = (1 << 7);
4242 ata_qc_set_pc_nbytes(qc);
4247 * ata_scsi_var_len_cdb_xlat - SATL variable length CDB to Handler
4248 * @qc: Command to be translated
4250 * Translate a SCSI variable length CDB to specified commands.
4251 * It checks a service action value in CDB to call corresponding handler.
4254 * Zero on success, non-zero on failure
4257 static unsigned int ata_scsi_var_len_cdb_xlat(struct ata_queued_cmd *qc)
4259 struct scsi_cmnd *scmd = qc->scsicmd;
4260 const u8 *cdb = scmd->cmnd;
4261 const u16 sa = get_unaligned_be16(&cdb[8]);
4264 * if service action represents a ata pass-thru(32) command,
4265 * then pass it to ata_scsi_pass_thru handler.
4268 return ata_scsi_pass_thru(qc);
4270 /* unsupported service action */
4275 * ata_get_xlat_func - check if SCSI to ATA translation is possible
4277 * @cmd: SCSI command opcode to consider
4279 * Look up the SCSI command given, and determine whether the
4280 * SCSI command is to be translated or simulated.
4283 * Pointer to translation function if possible, %NULL if not.
4286 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
4296 return ata_scsi_rw_xlat;
4299 return ata_scsi_write_same_xlat;
4301 case SYNCHRONIZE_CACHE:
4302 if (ata_try_flush_cache(dev))
4303 return ata_scsi_flush_xlat;
4308 return ata_scsi_verify_xlat;
4312 return ata_scsi_pass_thru;
4314 case VARIABLE_LENGTH_CMD:
4315 return ata_scsi_var_len_cdb_xlat;
4318 case MODE_SELECT_10:
4319 return ata_scsi_mode_select_xlat;
4323 return ata_scsi_zbc_in_xlat;
4326 return ata_scsi_zbc_out_xlat;
4328 case SECURITY_PROTOCOL_IN:
4329 case SECURITY_PROTOCOL_OUT:
4330 if (!(dev->flags & ATA_DFLAG_TRUSTED))
4332 return ata_scsi_security_inout_xlat;
4335 return ata_scsi_start_stop_xlat;
4342 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
4343 * @ap: ATA port to which the command was being sent
4344 * @cmd: SCSI command to dump
4346 * Prints the contents of a SCSI command via printk().
4349 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
4350 struct scsi_cmnd *cmd)
4353 struct scsi_device *scsidev = cmd->device;
4355 DPRINTK("CDB (%u:%d,%d,%lld) %9ph\n",
4357 scsidev->channel, scsidev->id, scsidev->lun,
4362 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
4363 struct ata_device *dev)
4365 u8 scsi_op = scmd->cmnd[0];
4366 ata_xlat_func_t xlat_func;
4369 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
4370 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
4373 xlat_func = ata_get_xlat_func(dev, scsi_op);
4375 if (unlikely(!scmd->cmd_len))
4379 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
4380 /* relay SCSI command to ATAPI device */
4381 int len = COMMAND_SIZE(scsi_op);
4382 if (unlikely(len > scmd->cmd_len ||
4383 len > dev->cdb_len ||
4384 scmd->cmd_len > ATAPI_CDB_LEN))
4387 xlat_func = atapi_xlat;
4389 /* ATA_16 passthru, treat as an ATA command */
4390 if (unlikely(scmd->cmd_len > 16))
4393 xlat_func = ata_get_xlat_func(dev, scsi_op);
4398 rc = ata_scsi_translate(dev, scmd, xlat_func);
4400 ata_scsi_simulate(dev, scmd);
4405 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
4406 scmd->cmd_len, scsi_op, dev->cdb_len);
4407 scmd->result = DID_ERROR << 16;
4408 scmd->scsi_done(scmd);
4413 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
4414 * @shost: SCSI host of command to be sent
4415 * @cmd: SCSI command to be sent
4417 * In some cases, this function translates SCSI commands into
4418 * ATA taskfiles, and queues the taskfiles to be sent to
4419 * hardware. In other cases, this function simulates a
4420 * SCSI device by evaluating and responding to certain
4421 * SCSI commands. This creates the overall effect of
4422 * ATA and ATAPI devices appearing as SCSI devices.
4428 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4431 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
4433 struct ata_port *ap;
4434 struct ata_device *dev;
4435 struct scsi_device *scsidev = cmd->device;
4437 unsigned long irq_flags;
4439 ap = ata_shost_to_port(shost);
4441 spin_lock_irqsave(ap->lock, irq_flags);
4443 ata_scsi_dump_cdb(ap, cmd);
4445 dev = ata_scsi_find_dev(ap, scsidev);
4447 rc = __ata_scsi_queuecmd(cmd, dev);
4449 cmd->result = (DID_BAD_TARGET << 16);
4450 cmd->scsi_done(cmd);
4453 spin_unlock_irqrestore(ap->lock, irq_flags);
4459 * ata_scsi_simulate - simulate SCSI command on ATA device
4460 * @dev: the target device
4461 * @cmd: SCSI command being sent to device.
4463 * Interprets and directly executes a select list of SCSI commands
4464 * that can be handled internally.
4467 * spin_lock_irqsave(host lock)
4470 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
4472 struct ata_scsi_args args;
4473 const u8 *scsicmd = cmd->cmnd;
4480 switch(scsicmd[0]) {
4482 if (scsicmd[1] & 2) /* is CmdDt set? */
4483 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4484 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
4485 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
4486 else switch (scsicmd[2]) {
4488 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
4491 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
4494 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
4497 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
4500 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
4503 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
4506 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
4509 if (dev->flags & ATA_DFLAG_ZAC) {
4510 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6);
4515 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
4522 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
4526 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4529 case SERVICE_ACTION_IN_16:
4530 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
4531 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4533 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4537 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
4541 ata_scsi_set_sense(dev, cmd, 0, 0, 0);
4542 cmd->result = (DRIVER_SENSE << 24);
4545 /* if we reach this, then writeback caching is disabled,
4546 * turning this into a no-op.
4548 case SYNCHRONIZE_CACHE:
4551 /* no-op's, complete with success */
4555 case TEST_UNIT_READY:
4558 case SEND_DIAGNOSTIC:
4559 tmp8 = scsicmd[1] & ~(1 << 3);
4560 if (tmp8 != 0x4 || scsicmd[3] || scsicmd[4])
4561 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4564 case MAINTENANCE_IN:
4565 if ((scsicmd[1] & 0x1f) == MI_REPORT_SUPPORTED_OPERATION_CODES)
4566 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in);
4568 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4571 /* all other commands */
4573 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0);
4574 /* "Invalid command operation code" */
4578 cmd->scsi_done(cmd);
4581 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
4585 for (i = 0; i < host->n_ports; i++) {
4586 struct ata_port *ap = host->ports[i];
4587 struct Scsi_Host *shost;
4590 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
4594 shost->eh_noresume = 1;
4595 *(struct ata_port **)&shost->hostdata[0] = ap;
4596 ap->scsi_host = shost;
4598 shost->transportt = ata_scsi_transport_template;
4599 shost->unique_id = ap->print_id;
4602 shost->max_channel = 1;
4603 shost->max_cmd_len = 32;
4605 /* Schedule policy is determined by ->qc_defer()
4606 * callback and it needs to see every deferred qc.
4607 * Set host_blocked to 1 to prevent SCSI midlayer from
4608 * automatically deferring requests.
4610 shost->max_host_blocked = 1;
4612 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev);
4621 struct Scsi_Host *shost = host->ports[i]->scsi_host;
4623 /* scsi_host_put() is in ata_devres_release() */
4624 scsi_remove_host(shost);
4629 void ata_scsi_scan_host(struct ata_port *ap, int sync)
4632 struct ata_device *last_failed_dev = NULL;
4633 struct ata_link *link;
4634 struct ata_device *dev;
4637 ata_for_each_link(link, ap, EDGE) {
4638 ata_for_each_dev(dev, link, ENABLED) {
4639 struct scsi_device *sdev;
4640 int channel = 0, id = 0;
4645 if (ata_is_host_link(link))
4648 channel = link->pmp;
4650 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
4652 if (!IS_ERR(sdev)) {
4654 scsi_device_put(sdev);
4661 /* If we scanned while EH was in progress or allocation
4662 * failure occurred, scan would have failed silently. Check
4663 * whether all devices are attached.
4665 ata_for_each_link(link, ap, EDGE) {
4666 ata_for_each_dev(dev, link, ENABLED) {
4675 /* we're missing some SCSI devices */
4677 /* If caller requested synchrnous scan && we've made
4678 * any progress, sleep briefly and repeat.
4680 if (dev != last_failed_dev) {
4682 last_failed_dev = dev;
4686 /* We might be failing to detect boot device, give it
4687 * a few more chances.
4695 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
4698 queue_delayed_work(system_long_wq, &ap->hotplug_task,
4699 round_jiffies_relative(HZ));
4703 * ata_scsi_offline_dev - offline attached SCSI device
4704 * @dev: ATA device to offline attached SCSI device for
4706 * This function is called from ata_eh_hotplug() and responsible
4707 * for taking the SCSI device attached to @dev offline. This
4708 * function is called with host lock which protects dev->sdev
4712 * spin_lock_irqsave(host lock)
4715 * 1 if attached SCSI device exists, 0 otherwise.
4717 int ata_scsi_offline_dev(struct ata_device *dev)
4720 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
4727 * ata_scsi_remove_dev - remove attached SCSI device
4728 * @dev: ATA device to remove attached SCSI device for
4730 * This function is called from ata_eh_scsi_hotplug() and
4731 * responsible for removing the SCSI device attached to @dev.
4734 * Kernel thread context (may sleep).
4736 static void ata_scsi_remove_dev(struct ata_device *dev)
4738 struct ata_port *ap = dev->link->ap;
4739 struct scsi_device *sdev;
4740 unsigned long flags;
4742 /* Alas, we need to grab scan_mutex to ensure SCSI device
4743 * state doesn't change underneath us and thus
4744 * scsi_device_get() always succeeds. The mutex locking can
4745 * be removed if there is __scsi_device_get() interface which
4746 * increments reference counts regardless of device state.
4748 mutex_lock(&ap->scsi_host->scan_mutex);
4749 spin_lock_irqsave(ap->lock, flags);
4751 /* clearing dev->sdev is protected by host lock */
4756 /* If user initiated unplug races with us, sdev can go
4757 * away underneath us after the host lock and
4758 * scan_mutex are released. Hold onto it.
4760 if (scsi_device_get(sdev) == 0) {
4761 /* The following ensures the attached sdev is
4762 * offline on return from ata_scsi_offline_dev()
4763 * regardless it wins or loses the race
4764 * against this function.
4766 scsi_device_set_state(sdev, SDEV_OFFLINE);
4773 spin_unlock_irqrestore(ap->lock, flags);
4774 mutex_unlock(&ap->scsi_host->scan_mutex);
4777 ata_dev_info(dev, "detaching (SCSI %s)\n",
4778 dev_name(&sdev->sdev_gendev));
4780 scsi_remove_device(sdev);
4781 scsi_device_put(sdev);
4785 static void ata_scsi_handle_link_detach(struct ata_link *link)
4787 struct ata_port *ap = link->ap;
4788 struct ata_device *dev;
4790 ata_for_each_dev(dev, link, ALL) {
4791 unsigned long flags;
4793 if (!(dev->flags & ATA_DFLAG_DETACHED))
4796 spin_lock_irqsave(ap->lock, flags);
4797 dev->flags &= ~ATA_DFLAG_DETACHED;
4798 spin_unlock_irqrestore(ap->lock, flags);
4800 if (zpodd_dev_enabled(dev))
4803 ata_scsi_remove_dev(dev);
4808 * ata_scsi_media_change_notify - send media change event
4809 * @dev: Pointer to the disk device with media change event
4811 * Tell the block layer to send a media change notification
4815 * spin_lock_irqsave(host lock)
4817 void ata_scsi_media_change_notify(struct ata_device *dev)
4820 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
4825 * ata_scsi_hotplug - SCSI part of hotplug
4826 * @work: Pointer to ATA port to perform SCSI hotplug on
4828 * Perform SCSI part of hotplug. It's executed from a separate
4829 * workqueue after EH completes. This is necessary because SCSI
4830 * hot plugging requires working EH and hot unplugging is
4831 * synchronized with hot plugging with a mutex.
4834 * Kernel thread context (may sleep).
4836 void ata_scsi_hotplug(struct work_struct *work)
4838 struct ata_port *ap =
4839 container_of(work, struct ata_port, hotplug_task.work);
4842 if (ap->pflags & ATA_PFLAG_UNLOADING) {
4843 DPRINTK("ENTER/EXIT - unloading\n");
4850 * The block layer suspend/resume path is fundamentally broken due
4851 * to freezable kthreads and workqueue and may deadlock if a block
4852 * device gets removed while resume is in progress. I don't know
4853 * what the solution is short of removing freezable kthreads and
4854 * workqueues altogether.
4856 * The following is an ugly hack to avoid kicking off device
4857 * removal while freezer is active. This is a joke but does avoid
4858 * this particular deadlock scenario.
4860 * https://bugzilla.kernel.org/show_bug.cgi?id=62801
4861 * http://marc.info/?l=linux-kernel&m=138695698516487
4863 #ifdef CONFIG_FREEZER
4869 mutex_lock(&ap->scsi_scan_mutex);
4871 /* Unplug detached devices. We cannot use link iterator here
4872 * because PMP links have to be scanned even if PMP is
4873 * currently not attached. Iterate manually.
4875 ata_scsi_handle_link_detach(&ap->link);
4877 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
4878 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
4880 /* scan for new ones */
4881 ata_scsi_scan_host(ap, 0);
4883 mutex_unlock(&ap->scsi_scan_mutex);
4888 * ata_scsi_user_scan - indication for user-initiated bus scan
4889 * @shost: SCSI host to scan
4890 * @channel: Channel to scan
4894 * This function is called when user explicitly requests bus
4895 * scan. Set probe pending flag and invoke EH.
4898 * SCSI layer (we don't care)
4903 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
4904 unsigned int id, u64 lun)
4906 struct ata_port *ap = ata_shost_to_port(shost);
4907 unsigned long flags;
4910 if (!ap->ops->error_handler)
4913 if (lun != SCAN_WILD_CARD && lun)
4916 if (!sata_pmp_attached(ap)) {
4917 if (channel != SCAN_WILD_CARD && channel)
4921 if (id != SCAN_WILD_CARD && id)
4926 spin_lock_irqsave(ap->lock, flags);
4928 if (devno == SCAN_WILD_CARD) {
4929 struct ata_link *link;
4931 ata_for_each_link(link, ap, EDGE) {
4932 struct ata_eh_info *ehi = &link->eh_info;
4933 ehi->probe_mask |= ATA_ALL_DEVICES;
4934 ehi->action |= ATA_EH_RESET;
4937 struct ata_device *dev = ata_find_dev(ap, devno);
4940 struct ata_eh_info *ehi = &dev->link->eh_info;
4941 ehi->probe_mask |= 1 << dev->devno;
4942 ehi->action |= ATA_EH_RESET;
4948 ata_port_schedule_eh(ap);
4949 spin_unlock_irqrestore(ap->lock, flags);
4950 ata_port_wait_eh(ap);
4952 spin_unlock_irqrestore(ap->lock, flags);
4958 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4959 * @work: Pointer to ATA port to perform scsi_rescan_device()
4961 * After ATA pass thru (SAT) commands are executed successfully,
4962 * libata need to propagate the changes to SCSI layer.
4965 * Kernel thread context (may sleep).
4967 void ata_scsi_dev_rescan(struct work_struct *work)
4969 struct ata_port *ap =
4970 container_of(work, struct ata_port, scsi_rescan_task);
4971 struct ata_link *link;
4972 struct ata_device *dev;
4973 unsigned long flags;
4975 mutex_lock(&ap->scsi_scan_mutex);
4976 spin_lock_irqsave(ap->lock, flags);
4978 ata_for_each_link(link, ap, EDGE) {
4979 ata_for_each_dev(dev, link, ENABLED) {
4980 struct scsi_device *sdev = dev->sdev;
4984 if (scsi_device_get(sdev))
4987 spin_unlock_irqrestore(ap->lock, flags);
4988 scsi_rescan_device(&(sdev->sdev_gendev));
4989 scsi_device_put(sdev);
4990 spin_lock_irqsave(ap->lock, flags);
4994 spin_unlock_irqrestore(ap->lock, flags);
4995 mutex_unlock(&ap->scsi_scan_mutex);
4999 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
5000 * @host: ATA host container for all SAS ports
5001 * @port_info: Information from low-level host driver
5002 * @shost: SCSI host that the scsi device is attached to
5005 * PCI/etc. bus probe sem.
5008 * ata_port pointer on success / NULL on failure.
5011 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
5012 struct ata_port_info *port_info,
5013 struct Scsi_Host *shost)
5015 struct ata_port *ap;
5017 ap = ata_port_alloc(host);
5022 ap->lock = &host->lock;
5023 ap->pio_mask = port_info->pio_mask;
5024 ap->mwdma_mask = port_info->mwdma_mask;
5025 ap->udma_mask = port_info->udma_mask;
5026 ap->flags |= port_info->flags;
5027 ap->ops = port_info->port_ops;
5028 ap->cbl = ATA_CBL_SATA;
5032 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
5035 * ata_sas_port_start - Set port up for dma.
5036 * @ap: Port to initialize
5038 * Called just after data structures for each port are
5041 * May be used as the port_start() entry in ata_port_operations.
5044 * Inherited from caller.
5046 int ata_sas_port_start(struct ata_port *ap)
5049 * the port is marked as frozen at allocation time, but if we don't
5050 * have new eh, we won't thaw it
5052 if (!ap->ops->error_handler)
5053 ap->pflags &= ~ATA_PFLAG_FROZEN;
5056 EXPORT_SYMBOL_GPL(ata_sas_port_start);
5059 * ata_port_stop - Undo ata_sas_port_start()
5060 * @ap: Port to shut down
5062 * May be used as the port_stop() entry in ata_port_operations.
5065 * Inherited from caller.
5068 void ata_sas_port_stop(struct ata_port *ap)
5071 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
5074 * ata_sas_async_probe - simply schedule probing and return
5075 * @ap: Port to probe
5077 * For batch scheduling of probe for sas attached ata devices, assumes
5078 * the port has already been through ata_sas_port_init()
5080 void ata_sas_async_probe(struct ata_port *ap)
5082 __ata_port_probe(ap);
5084 EXPORT_SYMBOL_GPL(ata_sas_async_probe);
5086 int ata_sas_sync_probe(struct ata_port *ap)
5088 return ata_port_probe(ap);
5090 EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
5094 * ata_sas_port_init - Initialize a SATA device
5095 * @ap: SATA port to initialize
5098 * PCI/etc. bus probe sem.
5101 * Zero on success, non-zero on error.
5104 int ata_sas_port_init(struct ata_port *ap)
5106 int rc = ap->ops->port_start(ap);
5110 ap->print_id = atomic_inc_return(&ata_print_id);
5113 EXPORT_SYMBOL_GPL(ata_sas_port_init);
5116 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
5117 * @ap: SATA port to destroy
5121 void ata_sas_port_destroy(struct ata_port *ap)
5123 if (ap->ops->port_stop)
5124 ap->ops->port_stop(ap);
5127 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
5130 * ata_sas_slave_configure - Default slave_config routine for libata devices
5131 * @sdev: SCSI device to configure
5132 * @ap: ATA port to which SCSI device is attached
5138 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
5140 ata_scsi_sdev_config(sdev);
5141 ata_scsi_dev_config(sdev, ap->link.device);
5144 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
5147 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
5148 * @cmd: SCSI command to be sent
5149 * @ap: ATA port to which the command is being sent
5152 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
5156 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
5160 ata_scsi_dump_cdb(ap, cmd);
5162 if (likely(ata_dev_enabled(ap->link.device)))
5163 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
5165 cmd->result = (DID_BAD_TARGET << 16);
5166 cmd->scsi_done(cmd);
5170 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
5172 int ata_sas_allocate_tag(struct ata_port *ap)
5174 unsigned int max_queue = ap->host->n_tags;
5175 unsigned int i, tag;
5177 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) {
5178 tag = tag < max_queue ? tag : 0;
5180 /* the last tag is reserved for internal command. */
5181 if (tag == ATA_TAG_INTERNAL)
5184 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) {
5185 ap->sas_last_tag = tag;
5192 void ata_sas_free_tag(unsigned int tag, struct ata_port *ap)
5194 clear_bit(tag, &ap->sas_tag_allocated);