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/DocBook/libata.*
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/slab.h>
37 #include <linux/kernel.h>
38 #include <linux/blkdev.h>
39 #include <linux/spinlock.h>
40 #include <linux/export.h>
41 #include <scsi/scsi.h>
42 #include <scsi/scsi_host.h>
43 #include <scsi/scsi_cmnd.h>
44 #include <scsi/scsi_eh.h>
45 #include <scsi/scsi_device.h>
46 #include <scsi/scsi_tcq.h>
47 #include <scsi/scsi_transport.h>
48 #include <linux/libata.h>
49 #include <linux/hdreg.h>
50 #include <linux/uaccess.h>
51 #include <linux/suspend.h>
52 #include <asm/unaligned.h>
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;
179 unsigned int uninitialized_var(msecs);
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;
608 if (copy_from_user(args, arg, sizeof(args)))
611 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
615 memset(scsi_cmd, 0, sizeof(scsi_cmd));
618 argsize = ATA_SECT_SIZE * args[3];
619 argbuf = kmalloc(argsize, GFP_KERNEL);
620 if (argbuf == NULL) {
625 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
626 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
627 block count in sector count field */
628 data_dir = DMA_FROM_DEVICE;
630 scsi_cmd[1] = (3 << 1); /* Non-data */
631 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
635 scsi_cmd[0] = ATA_16;
637 scsi_cmd[4] = args[2];
638 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
639 scsi_cmd[6] = args[3];
640 scsi_cmd[8] = args[1];
644 scsi_cmd[6] = args[1];
646 scsi_cmd[14] = args[0];
648 /* Good values for timeout and retries? Values below
649 from scsi_ioctl_send_command() for default case... */
650 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
651 sensebuf, (10*HZ), 5, 0, NULL);
653 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
654 u8 *desc = sensebuf + 8;
655 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
657 /* If we set cc then ATA pass-through will cause a
658 * check condition even if no error. Filter that. */
659 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
660 struct scsi_sense_hdr sshdr;
661 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
663 if (sshdr.sense_key == RECOVERED_ERROR &&
664 sshdr.asc == 0 && sshdr.ascq == 0x1d)
665 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
668 /* Send userspace a few ATA registers (same as drivers/ide) */
669 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
670 desc[0] == 0x09) { /* code is "ATA Descriptor" */
671 args[0] = desc[13]; /* status */
672 args[1] = desc[3]; /* error */
673 args[2] = desc[5]; /* sector count (0:7) */
674 if (copy_to_user(arg, args, sizeof(args)))
686 && copy_to_user(arg + sizeof(args), argbuf, argsize))
695 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
696 * @scsidev: Device to which we are issuing command
697 * @arg: User provided data for issuing command
700 * Defined by the SCSI layer. We don't really care.
703 * Zero on success, negative errno on error.
705 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
708 u8 scsi_cmd[MAX_COMMAND_SIZE];
709 u8 args[7], *sensebuf = NULL;
715 if (copy_from_user(args, arg, sizeof(args)))
718 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
722 memset(scsi_cmd, 0, sizeof(scsi_cmd));
723 scsi_cmd[0] = ATA_16;
724 scsi_cmd[1] = (3 << 1); /* Non-data */
725 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
726 scsi_cmd[4] = args[1];
727 scsi_cmd[6] = args[2];
728 scsi_cmd[8] = args[3];
729 scsi_cmd[10] = args[4];
730 scsi_cmd[12] = args[5];
731 scsi_cmd[13] = args[6] & 0x4f;
732 scsi_cmd[14] = args[0];
734 /* Good values for timeout and retries? Values below
735 from scsi_ioctl_send_command() for default case... */
736 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
737 sensebuf, (10*HZ), 5, 0, NULL);
739 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
740 u8 *desc = sensebuf + 8;
741 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
743 /* If we set cc then ATA pass-through will cause a
744 * check condition even if no error. Filter that. */
745 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
746 struct scsi_sense_hdr sshdr;
747 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
749 if (sshdr.sense_key == RECOVERED_ERROR &&
750 sshdr.asc == 0 && sshdr.ascq == 0x1d)
751 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
754 /* Send userspace ATA registers */
755 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
756 desc[0] == 0x09) {/* code is "ATA Descriptor" */
757 args[0] = desc[13]; /* status */
758 args[1] = desc[3]; /* error */
759 args[2] = desc[5]; /* sector count (0:7) */
760 args[3] = desc[7]; /* lbal */
761 args[4] = desc[9]; /* lbam */
762 args[5] = desc[11]; /* lbah */
763 args[6] = desc[12]; /* select */
764 if (copy_to_user(arg, args, sizeof(args)))
779 static int ata_ioc32(struct ata_port *ap)
781 if (ap->flags & ATA_FLAG_PIO_DMA)
783 if (ap->pflags & ATA_PFLAG_PIO32)
788 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
789 int cmd, void __user *arg)
797 spin_lock_irqsave(ap->lock, flags);
799 spin_unlock_irqrestore(ap->lock, flags);
800 return put_user(val, (unsigned long __user *)arg);
803 val = (unsigned long) arg;
805 spin_lock_irqsave(ap->lock, flags);
806 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
808 ap->pflags |= ATA_PFLAG_PIO32;
810 ap->pflags &= ~ATA_PFLAG_PIO32;
812 if (val != ata_ioc32(ap))
815 spin_unlock_irqrestore(ap->lock, flags);
818 case HDIO_GET_IDENTITY:
819 return ata_get_identity(ap, scsidev, arg);
822 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
824 return ata_cmd_ioctl(scsidev, arg);
826 case HDIO_DRIVE_TASK:
827 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
829 return ata_task_ioctl(scsidev, arg);
838 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
840 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
842 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
845 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
848 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
849 * @dev: ATA device to which the new command is attached
850 * @cmd: SCSI command that originated this ATA command
852 * Obtain a reference to an unused ata_queued_cmd structure,
853 * which is the basic libata structure representing a single
854 * ATA command sent to the hardware.
856 * If a command was available, fill in the SCSI-specific
857 * portions of the structure with information on the
861 * spin_lock_irqsave(host lock)
864 * Command allocated, or %NULL if none available.
866 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
867 struct scsi_cmnd *cmd)
869 struct ata_queued_cmd *qc;
871 qc = ata_qc_new_init(dev, cmd->request->tag);
874 qc->scsidone = cmd->scsi_done;
876 qc->sg = scsi_sglist(cmd);
877 qc->n_elem = scsi_sg_count(cmd);
879 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
886 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
888 struct scsi_cmnd *scmd = qc->scsicmd;
890 qc->extrabytes = scmd->request->extra_len;
891 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
895 * ata_dump_status - user friendly display of error info
896 * @id: id of the port in question
897 * @tf: ptr to filled out taskfile
899 * Decode and dump the ATA error/status registers for the user so
900 * that they have some idea what really happened at the non
901 * make-believe layer.
904 * inherited from caller
906 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
908 u8 stat = tf->command, err = tf->feature;
910 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
911 if (stat & ATA_BUSY) {
912 printk("Busy }\n"); /* Data is not valid in this case */
914 if (stat & ATA_DRDY) printk("DriveReady ");
915 if (stat & ATA_DF) printk("DeviceFault ");
916 if (stat & ATA_DSC) printk("SeekComplete ");
917 if (stat & ATA_DRQ) printk("DataRequest ");
918 if (stat & ATA_CORR) printk("CorrectedError ");
919 if (stat & ATA_SENSE) printk("Sense ");
920 if (stat & ATA_ERR) printk("Error ");
924 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
925 if (err & ATA_ABORTED) printk("DriveStatusError ");
926 if (err & ATA_ICRC) {
927 if (err & ATA_ABORTED)
929 else printk("Sector ");
931 if (err & ATA_UNC) printk("UncorrectableError ");
932 if (err & ATA_IDNF) printk("SectorIdNotFound ");
933 if (err & ATA_TRK0NF) printk("TrackZeroNotFound ");
934 if (err & ATA_AMNF) printk("AddrMarkNotFound ");
941 * ata_to_sense_error - convert ATA error to SCSI error
942 * @id: ATA device number
943 * @drv_stat: value contained in ATA status register
944 * @drv_err: value contained in ATA error register
945 * @sk: the sense key we'll fill out
946 * @asc: the additional sense code we'll fill out
947 * @ascq: the additional sense code qualifier we'll fill out
948 * @verbose: be verbose
950 * Converts an ATA error into a SCSI error. Fill out pointers to
951 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
952 * format sense blocks.
955 * spin_lock_irqsave(host lock)
957 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
958 u8 *asc, u8 *ascq, int verbose)
962 /* Based on the 3ware driver translation table */
963 static const unsigned char sense_table[][4] = {
965 {0xd1, ABORTED_COMMAND, 0x00, 0x00},
966 // Device busy Aborted command
968 {0xd0, ABORTED_COMMAND, 0x00, 0x00},
969 // Device busy Aborted command
971 {0x61, HARDWARE_ERROR, 0x00, 0x00},
972 // Device fault Hardware error
973 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
974 {0x84, ABORTED_COMMAND, 0x47, 0x00},
975 // Data CRC error SCSI parity error
976 /* MC|ID|ABRT|TRK0|MARK */
977 {0x37, NOT_READY, 0x04, 0x00},
978 // Unit offline Not ready
980 {0x09, NOT_READY, 0x04, 0x00},
981 // Unrecovered disk error Not ready
982 /* Bad address mark */
983 {0x01, MEDIUM_ERROR, 0x13, 0x00},
984 // Address mark not found for data field
985 /* TRK0 - Track 0 not found */
986 {0x02, HARDWARE_ERROR, 0x00, 0x00},
988 /* Abort: 0x04 is not translated here, see below */
989 /* Media change request */
990 {0x08, NOT_READY, 0x04, 0x00},
991 // FIXME: faking offline
992 /* SRV/IDNF - ID not found */
993 {0x10, ILLEGAL_REQUEST, 0x21, 0x00},
994 // Logical address out of range
995 /* MC - Media Changed */
996 {0x20, UNIT_ATTENTION, 0x28, 0x00},
997 // Not ready to ready change, medium may have changed
998 /* ECC - Uncorrectable ECC error */
999 {0x40, MEDIUM_ERROR, 0x11, 0x04},
1000 // Unrecovered read error
1001 /* BBD - block marked bad */
1002 {0x80, MEDIUM_ERROR, 0x11, 0x04},
1003 // Block marked bad Medium error, unrecovered read error
1004 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1006 static const unsigned char stat_table[][4] = {
1007 /* Must be first because BUSY means no other bits valid */
1008 {0x80, ABORTED_COMMAND, 0x47, 0x00},
1009 // Busy, fake parity for now
1010 {0x40, ILLEGAL_REQUEST, 0x21, 0x04},
1011 // Device ready, unaligned write command
1012 {0x20, HARDWARE_ERROR, 0x44, 0x00},
1013 // Device fault, internal target failure
1014 {0x08, ABORTED_COMMAND, 0x47, 0x00},
1015 // Timed out in xfer, fake parity for now
1016 {0x04, RECOVERED_ERROR, 0x11, 0x00},
1017 // Recovered ECC error Medium error, recovered
1018 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1022 * Is this an error we can process/parse
1024 if (drv_stat & ATA_BUSY) {
1025 drv_err = 0; /* Ignore the err bits, they're invalid */
1029 /* Look for drv_err */
1030 for (i = 0; sense_table[i][0] != 0xFF; i++) {
1031 /* Look for best matches first */
1032 if ((sense_table[i][0] & drv_err) ==
1033 sense_table[i][0]) {
1034 *sk = sense_table[i][1];
1035 *asc = sense_table[i][2];
1036 *ascq = sense_table[i][3];
1037 goto translate_done;
1043 * Fall back to interpreting status bits. Note that if the drv_err
1044 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
1045 * is not descriptive enough.
1047 for (i = 0; stat_table[i][0] != 0xFF; i++) {
1048 if (stat_table[i][0] & drv_stat) {
1049 *sk = stat_table[i][1];
1050 *asc = stat_table[i][2];
1051 *ascq = stat_table[i][3];
1052 goto translate_done;
1057 * We need a sensible error return here, which is tricky, and one
1058 * that won't cause people to do things like return a disk wrongly.
1060 *sk = ABORTED_COMMAND;
1066 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
1067 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
1068 id, drv_stat, drv_err, *sk, *asc, *ascq);
1073 * ata_gen_passthru_sense - Generate check condition sense block.
1074 * @qc: Command that completed.
1076 * This function is specific to the ATA descriptor format sense
1077 * block specified for the ATA pass through commands. Regardless
1078 * of whether the command errored or not, return a sense
1079 * block. Copy all controller registers into the sense
1080 * block. If there was no error, we get the request from an ATA
1081 * passthrough command, so we use the following sense data:
1082 * sk = RECOVERED ERROR
1083 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1089 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
1091 struct scsi_cmnd *cmd = qc->scsicmd;
1092 struct ata_taskfile *tf = &qc->result_tf;
1093 unsigned char *sb = cmd->sense_buffer;
1094 unsigned char *desc = sb + 8;
1095 int verbose = qc->ap->ops->error_handler == NULL;
1096 u8 sense_key, asc, ascq;
1098 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1100 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1103 * Use ata_to_sense_error() to map status register bits
1104 * onto sense key, asc & ascq.
1107 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1108 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1109 &sense_key, &asc, &ascq, verbose);
1110 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq);
1113 * ATA PASS-THROUGH INFORMATION AVAILABLE
1114 * Always in descriptor format sense.
1116 scsi_build_sense_buffer(1, cmd->sense_buffer,
1117 RECOVERED_ERROR, 0, 0x1D);
1120 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) {
1123 /* descriptor format */
1125 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9);
1127 if (SCSI_SENSE_BUFFERSIZE < len + 14)
1130 desc = sb + 8 + len;
1135 * Copy registers into sense buffer.
1138 desc[3] = tf->feature; /* == error reg */
1139 desc[5] = tf->nsect;
1142 desc[11] = tf->lbah;
1143 desc[12] = tf->device;
1144 desc[13] = tf->command; /* == status reg */
1147 * Fill in Extend bit, and the high order bytes
1150 if (tf->flags & ATA_TFLAG_LBA48) {
1152 desc[4] = tf->hob_nsect;
1153 desc[6] = tf->hob_lbal;
1154 desc[8] = tf->hob_lbam;
1155 desc[10] = tf->hob_lbah;
1158 /* Fixed sense format */
1159 desc[0] = tf->feature;
1160 desc[1] = tf->command; /* status */
1161 desc[2] = tf->device;
1162 desc[3] = tf->nsect;
1164 if (tf->flags & ATA_TFLAG_LBA48) {
1168 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah)
1172 desc[10] = tf->lbam;
1173 desc[11] = tf->lbah;
1178 * ata_gen_ata_sense - generate a SCSI fixed sense block
1179 * @qc: Command that we are erroring out
1181 * Generate sense block for a failed ATA command @qc. Descriptor
1182 * format is used to accommodate LBA48 block address.
1187 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1189 struct ata_device *dev = qc->dev;
1190 struct scsi_cmnd *cmd = qc->scsicmd;
1191 struct ata_taskfile *tf = &qc->result_tf;
1192 unsigned char *sb = cmd->sense_buffer;
1193 int verbose = qc->ap->ops->error_handler == NULL;
1195 u8 sense_key, asc, ascq;
1197 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1199 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1201 if (ata_dev_disabled(dev)) {
1202 /* Device disabled after error recovery */
1203 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
1204 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21);
1207 /* Use ata_to_sense_error() to map status register bits
1208 * onto sense key, asc & ascq.
1211 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1212 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1213 &sense_key, &asc, &ascq, verbose);
1214 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq);
1216 /* Could not decode error */
1217 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n",
1218 tf->command, qc->err_mask);
1219 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0);
1223 block = ata_tf_read_block(&qc->result_tf, dev);
1224 if (block == U64_MAX)
1227 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block);
1230 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1232 sdev->use_10_for_rw = 1;
1233 sdev->use_10_for_ms = 1;
1234 sdev->no_write_same = 1;
1236 /* Schedule policy is determined by ->qc_defer() callback and
1237 * it needs to see every deferred qc. Set dev_blocked to 1 to
1238 * prevent SCSI midlayer from automatically deferring
1241 sdev->max_device_blocked = 1;
1245 * atapi_drain_needed - Check whether data transfer may overflow
1246 * @rq: request to be checked
1248 * ATAPI commands which transfer variable length data to host
1249 * might overflow due to application error or hardware bug. This
1250 * function checks whether overflow should be drained and ignored
1257 * 1 if ; otherwise, 0.
1259 static int atapi_drain_needed(struct request *rq)
1261 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
1264 if (!blk_rq_bytes(rq) || op_is_write(req_op(rq)))
1267 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1270 static int ata_scsi_dev_config(struct scsi_device *sdev,
1271 struct ata_device *dev)
1273 struct request_queue *q = sdev->request_queue;
1275 if (!ata_id_has_unload(dev->id))
1276 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1278 /* configure max sectors */
1279 blk_queue_max_hw_sectors(q, dev->max_sectors);
1281 if (dev->class == ATA_DEV_ATAPI) {
1284 sdev->sector_size = ATA_SECT_SIZE;
1286 /* set DMA padding */
1287 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1289 /* configure draining */
1290 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1292 ata_dev_err(dev, "drain buffer allocation failed\n");
1296 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1298 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1299 sdev->manage_start_stop = 1;
1303 * ata_pio_sectors() expects buffer for each sector to not cross
1304 * page boundary. Enforce it by requiring buffers to be sector
1305 * aligned, which works iff sector_size is not larger than
1306 * PAGE_SIZE. ATAPI devices also need the alignment as
1307 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1309 if (sdev->sector_size > PAGE_SIZE)
1311 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1314 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1316 if (dev->flags & ATA_DFLAG_AN)
1317 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1319 if (dev->flags & ATA_DFLAG_NCQ) {
1322 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1323 depth = min(ATA_MAX_QUEUE - 1, depth);
1324 scsi_change_queue_depth(sdev, depth);
1327 blk_queue_flush_queueable(q, false);
1334 * ata_scsi_slave_config - Set SCSI device attributes
1335 * @sdev: SCSI device to examine
1337 * This is called before we actually start reading
1338 * and writing to the device, to configure certain
1339 * SCSI mid-layer behaviors.
1342 * Defined by SCSI layer. We don't really care.
1345 int ata_scsi_slave_config(struct scsi_device *sdev)
1347 struct ata_port *ap = ata_shost_to_port(sdev->host);
1348 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1351 ata_scsi_sdev_config(sdev);
1354 rc = ata_scsi_dev_config(sdev, dev);
1360 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1361 * @sdev: SCSI device to be destroyed
1363 * @sdev is about to be destroyed for hot/warm unplugging. If
1364 * this unplugging was initiated by libata as indicated by NULL
1365 * dev->sdev, this function doesn't have to do anything.
1366 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1367 * Clear dev->sdev, schedule the device for ATA detach and invoke
1371 * Defined by SCSI layer. We don't really care.
1373 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1375 struct ata_port *ap = ata_shost_to_port(sdev->host);
1376 struct request_queue *q = sdev->request_queue;
1377 unsigned long flags;
1378 struct ata_device *dev;
1380 if (!ap->ops->error_handler)
1383 spin_lock_irqsave(ap->lock, flags);
1384 dev = __ata_scsi_find_dev(ap, sdev);
1385 if (dev && dev->sdev) {
1386 /* SCSI device already in CANCEL state, no need to offline it */
1388 dev->flags |= ATA_DFLAG_DETACH;
1389 ata_port_schedule_eh(ap);
1391 spin_unlock_irqrestore(ap->lock, flags);
1393 kfree(q->dma_drain_buffer);
1394 q->dma_drain_buffer = NULL;
1395 q->dma_drain_size = 0;
1399 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1400 * @ap: ATA port to which the device change the queue depth
1401 * @sdev: SCSI device to configure queue depth for
1402 * @queue_depth: new queue depth
1404 * libsas and libata have different approaches for associating a sdev to
1408 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1411 struct ata_device *dev;
1412 unsigned long flags;
1414 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1415 return sdev->queue_depth;
1417 dev = ata_scsi_find_dev(ap, sdev);
1418 if (!dev || !ata_dev_enabled(dev))
1419 return sdev->queue_depth;
1422 spin_lock_irqsave(ap->lock, flags);
1423 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1424 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1425 dev->flags |= ATA_DFLAG_NCQ_OFF;
1428 spin_unlock_irqrestore(ap->lock, flags);
1430 /* limit and apply queue depth */
1431 queue_depth = min(queue_depth, sdev->host->can_queue);
1432 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1433 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1435 if (sdev->queue_depth == queue_depth)
1438 return scsi_change_queue_depth(sdev, queue_depth);
1442 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1443 * @sdev: SCSI device to configure queue depth for
1444 * @queue_depth: new queue depth
1446 * This is libata standard hostt->change_queue_depth callback.
1447 * SCSI will call into this callback when user tries to set queue
1451 * SCSI layer (we don't care)
1454 * Newly configured queue depth.
1456 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1458 struct ata_port *ap = ata_shost_to_port(sdev->host);
1460 return __ata_change_queue_depth(ap, sdev, queue_depth);
1464 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1465 * @qc: Storage for translated ATA taskfile
1467 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1468 * (to start). Perhaps these commands should be preceded by
1469 * CHECK POWER MODE to see what power mode the device is already in.
1470 * [See SAT revision 5 at www.t10.org]
1473 * spin_lock_irqsave(host lock)
1476 * Zero on success, non-zero on error.
1478 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1480 struct scsi_cmnd *scmd = qc->scsicmd;
1481 struct ata_taskfile *tf = &qc->tf;
1482 const u8 *cdb = scmd->cmnd;
1486 if (scmd->cmd_len < 5) {
1491 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1492 tf->protocol = ATA_PROT_NODATA;
1494 ; /* ignore IMMED bit, violates sat-r05 */
1499 goto invalid_fld; /* LOEJ bit set not supported */
1501 if (((cdb[4] >> 4) & 0xf) != 0) {
1504 goto invalid_fld; /* power conditions not supported */
1508 tf->nsect = 1; /* 1 sector, lba=0 */
1510 if (qc->dev->flags & ATA_DFLAG_LBA) {
1511 tf->flags |= ATA_TFLAG_LBA;
1516 tf->device |= ATA_LBA;
1519 tf->lbal = 0x1; /* sect */
1520 tf->lbam = 0x0; /* cyl low */
1521 tf->lbah = 0x0; /* cyl high */
1524 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1526 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1527 * or S5) causing some drives to spin up and down again.
1529 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1530 system_state == SYSTEM_POWER_OFF)
1533 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1534 system_entering_hibernation())
1537 /* Issue ATA STANDBY IMMEDIATE command */
1538 tf->command = ATA_CMD_STANDBYNOW1;
1542 * Standby and Idle condition timers could be implemented but that
1543 * would require libata to implement the Power condition mode page
1544 * and allow the user to change it. Changing mode pages requires
1545 * MODE SELECT to be implemented.
1551 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
1554 scmd->result = SAM_STAT_GOOD;
1560 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1561 * @qc: Storage for translated ATA taskfile
1563 * Sets up an ATA taskfile to issue FLUSH CACHE or
1567 * spin_lock_irqsave(host lock)
1570 * Zero on success, non-zero on error.
1572 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1574 struct ata_taskfile *tf = &qc->tf;
1576 tf->flags |= ATA_TFLAG_DEVICE;
1577 tf->protocol = ATA_PROT_NODATA;
1579 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1580 tf->command = ATA_CMD_FLUSH_EXT;
1582 tf->command = ATA_CMD_FLUSH;
1584 /* flush is critical for IO integrity, consider it an IO command */
1585 qc->flags |= ATA_QCFLAG_IO;
1591 * scsi_6_lba_len - Get LBA and transfer length
1592 * @cdb: SCSI command to translate
1594 * Calculate LBA and transfer length for 6-byte commands.
1598 * @plen: the transfer length
1600 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1605 VPRINTK("six-byte command\n");
1607 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1608 lba |= ((u64)cdb[2]) << 8;
1609 lba |= ((u64)cdb[3]);
1618 * scsi_10_lba_len - Get LBA and transfer length
1619 * @cdb: SCSI command to translate
1621 * Calculate LBA and transfer length for 10-byte commands.
1625 * @plen: the transfer length
1627 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1632 VPRINTK("ten-byte command\n");
1634 lba |= ((u64)cdb[2]) << 24;
1635 lba |= ((u64)cdb[3]) << 16;
1636 lba |= ((u64)cdb[4]) << 8;
1637 lba |= ((u64)cdb[5]);
1639 len |= ((u32)cdb[7]) << 8;
1640 len |= ((u32)cdb[8]);
1647 * scsi_16_lba_len - Get LBA and transfer length
1648 * @cdb: SCSI command to translate
1650 * Calculate LBA and transfer length for 16-byte commands.
1654 * @plen: the transfer length
1656 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1661 VPRINTK("sixteen-byte command\n");
1663 lba |= ((u64)cdb[2]) << 56;
1664 lba |= ((u64)cdb[3]) << 48;
1665 lba |= ((u64)cdb[4]) << 40;
1666 lba |= ((u64)cdb[5]) << 32;
1667 lba |= ((u64)cdb[6]) << 24;
1668 lba |= ((u64)cdb[7]) << 16;
1669 lba |= ((u64)cdb[8]) << 8;
1670 lba |= ((u64)cdb[9]);
1672 len |= ((u32)cdb[10]) << 24;
1673 len |= ((u32)cdb[11]) << 16;
1674 len |= ((u32)cdb[12]) << 8;
1675 len |= ((u32)cdb[13]);
1682 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1683 * @qc: Storage for translated ATA taskfile
1685 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1688 * spin_lock_irqsave(host lock)
1691 * Zero on success, non-zero on error.
1693 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1695 struct scsi_cmnd *scmd = qc->scsicmd;
1696 struct ata_taskfile *tf = &qc->tf;
1697 struct ata_device *dev = qc->dev;
1698 u64 dev_sectors = qc->dev->n_sectors;
1699 const u8 *cdb = scmd->cmnd;
1704 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1705 tf->protocol = ATA_PROT_NODATA;
1707 if (cdb[0] == VERIFY) {
1708 if (scmd->cmd_len < 10) {
1712 scsi_10_lba_len(cdb, &block, &n_block);
1713 } else if (cdb[0] == VERIFY_16) {
1714 if (scmd->cmd_len < 16) {
1718 scsi_16_lba_len(cdb, &block, &n_block);
1726 if (block >= dev_sectors)
1728 if ((block + n_block) > dev_sectors)
1731 if (dev->flags & ATA_DFLAG_LBA) {
1732 tf->flags |= ATA_TFLAG_LBA;
1734 if (lba_28_ok(block, n_block)) {
1736 tf->command = ATA_CMD_VERIFY;
1737 tf->device |= (block >> 24) & 0xf;
1738 } else if (lba_48_ok(block, n_block)) {
1739 if (!(dev->flags & ATA_DFLAG_LBA48))
1743 tf->flags |= ATA_TFLAG_LBA48;
1744 tf->command = ATA_CMD_VERIFY_EXT;
1746 tf->hob_nsect = (n_block >> 8) & 0xff;
1748 tf->hob_lbah = (block >> 40) & 0xff;
1749 tf->hob_lbam = (block >> 32) & 0xff;
1750 tf->hob_lbal = (block >> 24) & 0xff;
1752 /* request too large even for LBA48 */
1755 tf->nsect = n_block & 0xff;
1757 tf->lbah = (block >> 16) & 0xff;
1758 tf->lbam = (block >> 8) & 0xff;
1759 tf->lbal = block & 0xff;
1761 tf->device |= ATA_LBA;
1764 u32 sect, head, cyl, track;
1766 if (!lba_28_ok(block, n_block))
1769 /* Convert LBA to CHS */
1770 track = (u32)block / dev->sectors;
1771 cyl = track / dev->heads;
1772 head = track % dev->heads;
1773 sect = (u32)block % dev->sectors + 1;
1775 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1776 (u32)block, track, cyl, head, sect);
1778 /* Check whether the converted CHS can fit.
1782 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1785 tf->command = ATA_CMD_VERIFY;
1786 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1789 tf->lbah = cyl >> 8;
1796 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1800 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1801 /* "Logical Block Address out of range" */
1805 scmd->result = SAM_STAT_GOOD;
1810 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1811 * @qc: Storage for translated ATA taskfile
1813 * Converts any of six SCSI read/write commands into the
1814 * ATA counterpart, including starting sector (LBA),
1815 * sector count, and taking into account the device's LBA48
1818 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1819 * %WRITE_16 are currently supported.
1822 * spin_lock_irqsave(host lock)
1825 * Zero on success, non-zero on error.
1827 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1829 struct scsi_cmnd *scmd = qc->scsicmd;
1830 const u8 *cdb = scmd->cmnd;
1831 struct request *rq = scmd->request;
1832 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
1833 unsigned int tf_flags = 0;
1839 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1840 tf_flags |= ATA_TFLAG_WRITE;
1842 /* Calculate the SCSI LBA, transfer length and FUA. */
1846 if (unlikely(scmd->cmd_len < 10)) {
1850 scsi_10_lba_len(cdb, &block, &n_block);
1851 if (cdb[1] & (1 << 3))
1852 tf_flags |= ATA_TFLAG_FUA;
1856 if (unlikely(scmd->cmd_len < 6)) {
1860 scsi_6_lba_len(cdb, &block, &n_block);
1862 /* for 6-byte r/w commands, transfer length 0
1863 * means 256 blocks of data, not 0 block.
1870 if (unlikely(scmd->cmd_len < 16)) {
1874 scsi_16_lba_len(cdb, &block, &n_block);
1875 if (cdb[1] & (1 << 3))
1876 tf_flags |= ATA_TFLAG_FUA;
1879 DPRINTK("no-byte command\n");
1884 /* Check and compose ATA command */
1886 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1887 * length 0 means transfer 0 block of data.
1888 * However, for ATA R/W commands, sector count 0 means
1889 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1891 * WARNING: one or two older ATA drives treat 0 as 0...
1895 qc->flags |= ATA_QCFLAG_IO;
1896 qc->nbytes = n_block * scmd->device->sector_size;
1898 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1901 if (likely(rc == 0))
1906 /* treat all other errors as -EINVAL, fall through */
1908 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1912 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1913 /* "Logical Block Address out of range" */
1917 scmd->result = SAM_STAT_GOOD;
1921 static void ata_qc_done(struct ata_queued_cmd *qc)
1923 struct scsi_cmnd *cmd = qc->scsicmd;
1924 void (*done)(struct scsi_cmnd *) = qc->scsidone;
1930 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1932 struct ata_port *ap = qc->ap;
1933 struct scsi_cmnd *cmd = qc->scsicmd;
1934 u8 *cdb = cmd->cmnd;
1935 int need_sense = (qc->err_mask != 0);
1937 /* For ATA pass thru (SAT) commands, generate a sense block if
1938 * user mandated it or if there's an error. Note that if we
1939 * generate because the user forced us to [CK_COND =1], a check
1940 * condition is generated and the ATA register values are returned
1941 * whether the command completed successfully or not. If there
1942 * was no error, we use the following sense data:
1943 * sk = RECOVERED ERROR
1944 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1946 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1947 ((cdb[2] & 0x20) || need_sense))
1948 ata_gen_passthru_sense(qc);
1949 else if (qc->flags & ATA_QCFLAG_SENSE_VALID)
1950 cmd->result = SAM_STAT_CHECK_CONDITION;
1951 else if (need_sense)
1952 ata_gen_ata_sense(qc);
1954 cmd->result = SAM_STAT_GOOD;
1956 if (need_sense && !ap->ops->error_handler)
1957 ata_dump_status(ap->print_id, &qc->result_tf);
1963 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1964 * @dev: ATA device to which the command is addressed
1965 * @cmd: SCSI command to execute
1966 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1968 * Our ->queuecommand() function has decided that the SCSI
1969 * command issued can be directly translated into an ATA
1970 * command, rather than handled internally.
1972 * This function sets up an ata_queued_cmd structure for the
1973 * SCSI command, and sends that ata_queued_cmd to the hardware.
1975 * The xlat_func argument (actor) returns 0 if ready to execute
1976 * ATA command, else 1 to finish translation. If 1 is returned
1977 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1978 * to be set reflecting an error condition or clean (early)
1982 * spin_lock_irqsave(host lock)
1985 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1986 * needs to be deferred.
1988 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1989 ata_xlat_func_t xlat_func)
1991 struct ata_port *ap = dev->link->ap;
1992 struct ata_queued_cmd *qc;
1997 qc = ata_scsi_qc_new(dev, cmd);
2001 /* data is present; dma-map it */
2002 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
2003 cmd->sc_data_direction == DMA_TO_DEVICE) {
2004 if (unlikely(scsi_bufflen(cmd) < 1)) {
2005 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
2009 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
2011 qc->dma_dir = cmd->sc_data_direction;
2014 qc->complete_fn = ata_scsi_qc_complete;
2019 if (ap->ops->qc_defer) {
2020 if ((rc = ap->ops->qc_defer(qc)))
2024 /* select device, send command to hardware */
2032 cmd->scsi_done(cmd);
2033 DPRINTK("EXIT - early finish (good or error)\n");
2038 cmd->result = (DID_ERROR << 16);
2039 cmd->scsi_done(cmd);
2041 DPRINTK("EXIT - internal\n");
2046 DPRINTK("EXIT - defer\n");
2047 if (rc == ATA_DEFER_LINK)
2048 return SCSI_MLQUEUE_DEVICE_BUSY;
2050 return SCSI_MLQUEUE_HOST_BUSY;
2053 struct ata_scsi_args {
2054 struct ata_device *dev;
2056 struct scsi_cmnd *cmd;
2060 * ata_scsi_rbuf_get - Map response buffer.
2061 * @cmd: SCSI command containing buffer to be mapped.
2062 * @flags: unsigned long variable to store irq enable status
2063 * @copy_in: copy in from user buffer
2065 * Prepare buffer for simulated SCSI commands.
2068 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
2071 * Pointer to response buffer.
2073 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
2074 unsigned long *flags)
2076 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
2078 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
2080 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2081 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2082 return ata_scsi_rbuf;
2086 * ata_scsi_rbuf_put - Unmap response buffer.
2087 * @cmd: SCSI command containing buffer to be unmapped.
2088 * @copy_out: copy out result
2089 * @flags: @flags passed to ata_scsi_rbuf_get()
2091 * Returns rbuf buffer. The result is copied to @cmd's buffer if
2092 * @copy_back is true.
2095 * Unlocks ata_scsi_rbuf_lock.
2097 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
2098 unsigned long *flags)
2101 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2102 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2103 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
2107 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
2108 * @args: device IDENTIFY data / SCSI command of interest.
2109 * @actor: Callback hook for desired SCSI command simulator
2111 * Takes care of the hard work of simulating a SCSI command...
2112 * Mapping the response buffer, calling the command's handler,
2113 * and handling the handler's return value. This return value
2114 * indicates whether the handler wishes the SCSI command to be
2115 * completed successfully (0), or not (in which case cmd->result
2116 * and sense buffer are assumed to be set).
2119 * spin_lock_irqsave(host lock)
2121 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
2122 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
2126 struct scsi_cmnd *cmd = args->cmd;
2127 unsigned long flags;
2129 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
2130 rc = actor(args, rbuf);
2131 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
2134 cmd->result = SAM_STAT_GOOD;
2138 * ata_scsiop_inq_std - Simulate INQUIRY command
2139 * @args: device IDENTIFY data / SCSI command of interest.
2140 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2142 * Returns standard device identification data associated
2143 * with non-VPD INQUIRY command output.
2146 * spin_lock_irqsave(host lock)
2148 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
2150 const u8 versions[] = {
2152 0x60, /* SAM-3 (no version claimed) */
2155 0x20, /* SBC-2 (no version claimed) */
2158 0x00 /* SPC-3 (no version claimed) */
2160 const u8 versions_zbc[] = {
2162 0xA0, /* SAM-5 (no version claimed) */
2165 0x00, /* SBC-4 (no version claimed) */
2168 0xC0, /* SPC-5 (no version claimed) */
2177 0x5, /* claim SPC-3 version compatibility */
2187 /* set scsi removable (RMB) bit per ata bit, or if the
2188 * AHCI port says it's external (Hotplug-capable, eSATA).
2190 if (ata_id_removable(args->id) ||
2191 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL))
2194 if (args->dev->class == ATA_DEV_ZAC) {
2196 hdr[2] = 0x7; /* claim SPC-5 version compatibility */
2199 memcpy(rbuf, hdr, sizeof(hdr));
2200 memcpy(&rbuf[8], "ATA ", 8);
2201 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
2203 /* From SAT, use last 2 words from fw rev unless they are spaces */
2204 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
2205 if (strncmp(&rbuf[32], " ", 4) == 0)
2206 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2208 if (rbuf[32] == 0 || rbuf[32] == ' ')
2209 memcpy(&rbuf[32], "n/a ", 4);
2211 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC)
2212 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc));
2214 memcpy(rbuf + 58, versions, sizeof(versions));
2220 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2221 * @args: device IDENTIFY data / SCSI command of interest.
2222 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2224 * Returns list of inquiry VPD pages available.
2227 * spin_lock_irqsave(host lock)
2229 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
2232 const u8 pages[] = {
2233 0x00, /* page 0x00, this page */
2234 0x80, /* page 0x80, unit serial no page */
2235 0x83, /* page 0x83, device ident page */
2236 0x89, /* page 0x89, ata info page */
2237 0xb0, /* page 0xb0, block limits page */
2238 0xb1, /* page 0xb1, block device characteristics page */
2239 0xb2, /* page 0xb2, thin provisioning page */
2240 0xb6, /* page 0xb6, zoned block device characteristics */
2243 num_pages = sizeof(pages);
2244 if (!(args->dev->flags & ATA_DFLAG_ZAC))
2246 rbuf[3] = num_pages; /* number of supported VPD pages */
2247 memcpy(rbuf + 4, pages, num_pages);
2252 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2253 * @args: device IDENTIFY data / SCSI command of interest.
2254 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2256 * Returns ATA device serial number.
2259 * spin_lock_irqsave(host lock)
2261 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2265 0x80, /* this page code */
2267 ATA_ID_SERNO_LEN, /* page len */
2270 memcpy(rbuf, hdr, sizeof(hdr));
2271 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2272 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2277 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2278 * @args: device IDENTIFY data / SCSI command of interest.
2279 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2281 * Yields two logical unit device identification designators:
2282 * - vendor specific ASCII containing the ATA serial number
2283 * - SAT defined "t10 vendor id based" containing ASCII vendor
2284 * name ("ATA "), model and serial numbers.
2287 * spin_lock_irqsave(host lock)
2289 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2291 const int sat_model_serial_desc_len = 68;
2294 rbuf[1] = 0x83; /* this page code */
2297 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2299 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2301 ata_id_string(args->id, (unsigned char *) rbuf + num,
2302 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2303 num += ATA_ID_SERNO_LEN;
2305 /* SAT defined lu model and serial numbers descriptor */
2306 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2309 rbuf[num + 3] = sat_model_serial_desc_len;
2311 memcpy(rbuf + num, "ATA ", 8);
2313 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2315 num += ATA_ID_PROD_LEN;
2316 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2318 num += ATA_ID_SERNO_LEN;
2320 if (ata_id_has_wwn(args->id)) {
2321 /* SAT defined lu world wide name */
2322 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2325 rbuf[num + 3] = ATA_ID_WWN_LEN;
2327 ata_id_string(args->id, (unsigned char *) rbuf + num,
2328 ATA_ID_WWN, ATA_ID_WWN_LEN);
2329 num += ATA_ID_WWN_LEN;
2331 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2336 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2337 * @args: device IDENTIFY data / SCSI command of interest.
2338 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2340 * Yields SAT-specified ATA VPD page.
2343 * spin_lock_irqsave(host lock)
2345 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2347 struct ata_taskfile tf;
2349 memset(&tf, 0, sizeof(tf));
2351 rbuf[1] = 0x89; /* our page code */
2352 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2353 rbuf[3] = (0x238 & 0xff);
2355 memcpy(&rbuf[8], "linux ", 8);
2356 memcpy(&rbuf[16], "libata ", 16);
2357 memcpy(&rbuf[32], DRV_VERSION, 4);
2359 /* we don't store the ATA device signature, so we fake it */
2361 tf.command = ATA_DRDY; /* really, this is Status reg */
2365 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2366 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2368 rbuf[56] = ATA_CMD_ID_ATA;
2370 memcpy(&rbuf[60], &args->id[0], 512);
2374 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2379 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2382 * Optimal transfer length granularity.
2384 * This is always one physical block, but for disks with a smaller
2385 * logical than physical sector size we need to figure out what the
2388 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2389 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2392 * Optimal unmap granularity.
2394 * The ATA spec doesn't even know about a granularity or alignment
2395 * for the TRIM command. We can leave away most of the unmap related
2396 * VPD page entries, but we have specifify a granularity to signal
2397 * that we support some form of unmap - in thise case via WRITE SAME
2398 * with the unmap bit set.
2400 if (ata_id_has_trim(args->id)) {
2401 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]);
2402 put_unaligned_be32(1, &rbuf[28]);
2408 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2410 int form_factor = ata_id_form_factor(args->id);
2411 int media_rotation_rate = ata_id_rotation_rate(args->id);
2412 u8 zoned = ata_id_zoned_cap(args->id);
2416 rbuf[4] = media_rotation_rate >> 8;
2417 rbuf[5] = media_rotation_rate;
2418 rbuf[7] = form_factor;
2420 rbuf[8] = (zoned << 4);
2425 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2427 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2430 rbuf[5] = 1 << 6; /* TPWS */
2435 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf)
2438 * zbc-r05 SCSI Zoned Block device characteristics VPD page
2444 * URSWRZ bit is only meaningful for host-managed ZAC drives
2446 if (args->dev->zac_zoned_cap & 1)
2448 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]);
2449 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]);
2450 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]);
2456 * ata_scsiop_noop - Command handler that simply returns success.
2457 * @args: device IDENTIFY data / SCSI command of interest.
2458 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2460 * No operation. Simply returns success to caller, to indicate
2461 * that the caller should successfully complete this SCSI command.
2464 * spin_lock_irqsave(host lock)
2466 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
2473 * modecpy - Prepare response for MODE SENSE
2474 * @dest: output buffer
2475 * @src: data being copied
2476 * @n: length of mode page
2477 * @changeable: whether changeable parameters are requested
2479 * Generate a generic MODE SENSE page for either current or changeable
2485 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2488 memcpy(dest, src, 2);
2489 memset(dest + 2, 0, n - 2);
2491 memcpy(dest, src, n);
2496 * ata_msense_caching - Simulate MODE SENSE caching info page
2497 * @id: device IDENTIFY data
2498 * @buf: output buffer
2499 * @changeable: whether changeable parameters are requested
2501 * Generate a caching info page, which conditionally indicates
2502 * write caching to the SCSI layer, depending on device
2508 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2510 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2512 buf[2] |= (1 << 2); /* ata_mselect_caching() */
2514 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */
2515 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */
2517 return sizeof(def_cache_mpage);
2521 * ata_msense_control - Simulate MODE SENSE control mode page
2522 * @dev: ATA device of interest
2523 * @buf: output buffer
2524 * @changeable: whether changeable parameters are requested
2526 * Generate a generic MODE SENSE control mode page.
2531 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf,
2534 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2536 buf[2] |= (1 << 2); /* ata_mselect_control() */
2538 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
2540 buf[2] |= (d_sense << 2); /* descriptor format sense data */
2542 return sizeof(def_control_mpage);
2546 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2547 * @buf: output buffer
2548 * @changeable: whether changeable parameters are requested
2550 * Generate a generic MODE SENSE r/w error recovery page.
2555 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2557 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2559 return sizeof(def_rw_recovery_mpage);
2563 * We can turn this into a real blacklist if it's needed, for now just
2564 * blacklist any Maxtor BANC1G10 revision firmware
2566 static int ata_dev_supports_fua(u16 *id)
2568 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2572 if (!ata_id_has_fua(id))
2575 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2576 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2578 if (strcmp(model, "Maxtor"))
2580 if (strcmp(fw, "BANC1G10"))
2583 return 0; /* blacklisted */
2587 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2588 * @args: device IDENTIFY data / SCSI command of interest.
2589 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2591 * Simulate MODE SENSE commands. Assume this is invoked for direct
2592 * access devices (e.g. disks) only. There should be no block
2593 * descriptor for other device types.
2596 * spin_lock_irqsave(host lock)
2598 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2600 struct ata_device *dev = args->dev;
2601 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2602 const u8 sat_blk_desc[] = {
2603 0, 0, 0, 0, /* number of blocks: sat unspecified */
2605 0, 0x2, 0x0 /* block length: 512 bytes */
2608 unsigned int ebd, page_control, six_byte;
2609 u8 dpofua, bp = 0xff;
2614 six_byte = (scsicmd[0] == MODE_SENSE);
2615 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2617 * LLBA bit in msense(10) ignored (compliant)
2620 page_control = scsicmd[2] >> 6;
2621 switch (page_control) {
2622 case 0: /* current */
2623 case 1: /* changeable */
2624 case 2: /* defaults */
2625 break; /* supported */
2627 goto saving_not_supp;
2635 p += 4 + (ebd ? 8 : 0);
2637 p += 8 + (ebd ? 8 : 0);
2639 pg = scsicmd[2] & 0x3f;
2642 * No mode subpages supported (yet) but asking for _all_
2643 * subpages may be valid
2645 if (spg && (spg != ALL_SUB_MPAGES)) {
2651 case RW_RECOVERY_MPAGE:
2652 p += ata_msense_rw_recovery(p, page_control == 1);
2656 p += ata_msense_caching(args->id, p, page_control == 1);
2660 p += ata_msense_control(args->dev, p, page_control == 1);
2664 p += ata_msense_rw_recovery(p, page_control == 1);
2665 p += ata_msense_caching(args->id, p, page_control == 1);
2666 p += ata_msense_control(args->dev, p, page_control == 1);
2669 default: /* invalid page code */
2675 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2676 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2680 rbuf[0] = p - rbuf - 1;
2683 rbuf[3] = sizeof(sat_blk_desc);
2684 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2687 unsigned int output_len = p - rbuf - 2;
2689 rbuf[0] = output_len >> 8;
2690 rbuf[1] = output_len;
2693 rbuf[7] = sizeof(sat_blk_desc);
2694 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2700 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp);
2704 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2705 /* "Saving parameters not supported" */
2710 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2711 * @args: device IDENTIFY data / SCSI command of interest.
2712 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2714 * Simulate READ CAPACITY commands.
2719 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2721 struct ata_device *dev = args->dev;
2722 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2723 u32 sector_size; /* physical sector size in bytes */
2727 sector_size = ata_id_logical_sector_size(dev->id);
2728 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2729 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2733 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2734 if (last_lba >= 0xffffffffULL)
2735 last_lba = 0xffffffff;
2737 /* sector count, 32-bit */
2738 rbuf[0] = last_lba >> (8 * 3);
2739 rbuf[1] = last_lba >> (8 * 2);
2740 rbuf[2] = last_lba >> (8 * 1);
2744 rbuf[4] = sector_size >> (8 * 3);
2745 rbuf[5] = sector_size >> (8 * 2);
2746 rbuf[6] = sector_size >> (8 * 1);
2747 rbuf[7] = sector_size;
2749 /* sector count, 64-bit */
2750 rbuf[0] = last_lba >> (8 * 7);
2751 rbuf[1] = last_lba >> (8 * 6);
2752 rbuf[2] = last_lba >> (8 * 5);
2753 rbuf[3] = last_lba >> (8 * 4);
2754 rbuf[4] = last_lba >> (8 * 3);
2755 rbuf[5] = last_lba >> (8 * 2);
2756 rbuf[6] = last_lba >> (8 * 1);
2760 rbuf[ 8] = sector_size >> (8 * 3);
2761 rbuf[ 9] = sector_size >> (8 * 2);
2762 rbuf[10] = sector_size >> (8 * 1);
2763 rbuf[11] = sector_size;
2766 rbuf[13] = log2_per_phys;
2767 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2768 rbuf[15] = lowest_aligned;
2770 if (ata_id_has_trim(args->id) &&
2771 !(dev->horkage & ATA_HORKAGE_NOTRIM)) {
2772 rbuf[14] |= 0x80; /* LBPME */
2774 if (ata_id_has_zero_after_trim(args->id) &&
2775 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) {
2776 ata_dev_info(dev, "Enabling discard_zeroes_data\n");
2777 rbuf[14] |= 0x40; /* LBPRZ */
2780 if (ata_id_zoned_cap(args->id) ||
2781 args->dev->class == ATA_DEV_ZAC)
2782 rbuf[12] = (1 << 4); /* RC_BASIS */
2788 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2789 * @args: device IDENTIFY data / SCSI command of interest.
2790 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2792 * Simulate REPORT LUNS command.
2795 * spin_lock_irqsave(host lock)
2797 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2800 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2805 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2807 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2808 /* FIXME: not quite right; we don't want the
2809 * translation of taskfile registers into
2810 * a sense descriptors, since that's only
2811 * correct for ATA, not ATAPI
2813 ata_gen_passthru_sense(qc);
2819 /* is it pointless to prefer PIO for "safety reasons"? */
2820 static inline int ata_pio_use_silly(struct ata_port *ap)
2822 return (ap->flags & ATA_FLAG_PIO_DMA);
2825 static void atapi_request_sense(struct ata_queued_cmd *qc)
2827 struct ata_port *ap = qc->ap;
2828 struct scsi_cmnd *cmd = qc->scsicmd;
2830 DPRINTK("ATAPI request sense\n");
2832 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2834 #ifdef CONFIG_ATA_SFF
2835 if (ap->ops->sff_tf_read)
2836 ap->ops->sff_tf_read(ap, &qc->tf);
2839 /* fill these in, for the case where they are -not- overwritten */
2840 cmd->sense_buffer[0] = 0x70;
2841 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2845 /* setup sg table and init transfer direction */
2846 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2847 ata_sg_init(qc, &qc->sgent, 1);
2848 qc->dma_dir = DMA_FROM_DEVICE;
2850 memset(&qc->cdb, 0, qc->dev->cdb_len);
2851 qc->cdb[0] = REQUEST_SENSE;
2852 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2854 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2855 qc->tf.command = ATA_CMD_PACKET;
2857 if (ata_pio_use_silly(ap)) {
2858 qc->tf.protocol = ATAPI_PROT_DMA;
2859 qc->tf.feature |= ATAPI_PKT_DMA;
2861 qc->tf.protocol = ATAPI_PROT_PIO;
2862 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2865 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2867 qc->complete_fn = atapi_sense_complete;
2875 * ATAPI devices typically report zero for their SCSI version, and sometimes
2876 * deviate from the spec WRT response data format. If SCSI version is
2877 * reported as zero like normal, then we make the following fixups:
2878 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a
2880 * 2) Ensure response data format / ATAPI information are always correct.
2882 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd)
2886 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2891 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2894 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2896 struct scsi_cmnd *cmd = qc->scsicmd;
2897 unsigned int err_mask = qc->err_mask;
2899 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2901 /* handle completion from new EH */
2902 if (unlikely(qc->ap->ops->error_handler &&
2903 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2905 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2906 /* FIXME: not quite right; we don't want the
2907 * translation of taskfile registers into a
2908 * sense descriptors, since that's only
2909 * correct for ATA, not ATAPI
2911 ata_gen_passthru_sense(qc);
2914 /* SCSI EH automatically locks door if sdev->locked is
2915 * set. Sometimes door lock request continues to
2916 * fail, for example, when no media is present. This
2917 * creates a loop - SCSI EH issues door lock which
2918 * fails and gets invoked again to acquire sense data
2919 * for the failed command.
2921 * If door lock fails, always clear sdev->locked to
2922 * avoid this infinite loop.
2924 * This may happen before SCSI scan is complete. Make
2925 * sure qc->dev->sdev isn't NULL before dereferencing.
2927 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2928 qc->dev->sdev->locked = 0;
2930 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2935 /* successful completion or old EH failure path */
2936 if (unlikely(err_mask & AC_ERR_DEV)) {
2937 cmd->result = SAM_STAT_CHECK_CONDITION;
2938 atapi_request_sense(qc);
2940 } else if (unlikely(err_mask)) {
2941 /* FIXME: not quite right; we don't want the
2942 * translation of taskfile registers into
2943 * a sense descriptors, since that's only
2944 * correct for ATA, not ATAPI
2946 ata_gen_passthru_sense(qc);
2948 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0)
2949 atapi_fixup_inquiry(cmd);
2950 cmd->result = SAM_STAT_GOOD;
2956 * atapi_xlat - Initialize PACKET taskfile
2957 * @qc: command structure to be initialized
2960 * spin_lock_irqsave(host lock)
2963 * Zero on success, non-zero on failure.
2965 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2967 struct scsi_cmnd *scmd = qc->scsicmd;
2968 struct ata_device *dev = qc->dev;
2969 int nodata = (scmd->sc_data_direction == DMA_NONE);
2970 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2971 unsigned int nbytes;
2973 memset(qc->cdb, 0, dev->cdb_len);
2974 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2976 qc->complete_fn = atapi_qc_complete;
2978 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2979 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2980 qc->tf.flags |= ATA_TFLAG_WRITE;
2981 DPRINTK("direction: write\n");
2984 qc->tf.command = ATA_CMD_PACKET;
2985 ata_qc_set_pc_nbytes(qc);
2987 /* check whether ATAPI DMA is safe */
2988 if (!nodata && !using_pio && atapi_check_dma(qc))
2991 /* Some controller variants snoop this value for Packet
2992 * transfers to do state machine and FIFO management. Thus we
2993 * want to set it properly, and for DMA where it is
2994 * effectively meaningless.
2996 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2998 /* Most ATAPI devices which honor transfer chunk size don't
2999 * behave according to the spec when odd chunk size which
3000 * matches the transfer length is specified. If the number of
3001 * bytes to transfer is 2n+1. According to the spec, what
3002 * should happen is to indicate that 2n+1 is going to be
3003 * transferred and transfer 2n+2 bytes where the last byte is
3006 * In practice, this doesn't happen. ATAPI devices first
3007 * indicate and transfer 2n bytes and then indicate and
3008 * transfer 2 bytes where the last byte is padding.
3010 * This inconsistency confuses several controllers which
3011 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
3012 * These controllers use actual number of transferred bytes to
3013 * update DMA poitner and transfer of 4n+2 bytes make those
3014 * controller push DMA pointer by 4n+4 bytes because SATA data
3015 * FISes are aligned to 4 bytes. This causes data corruption
3016 * and buffer overrun.
3018 * Always setting nbytes to even number solves this problem
3019 * because then ATAPI devices don't have to split data at 2n
3025 qc->tf.lbam = (nbytes & 0xFF);
3026 qc->tf.lbah = (nbytes >> 8);
3029 qc->tf.protocol = ATAPI_PROT_NODATA;
3031 qc->tf.protocol = ATAPI_PROT_PIO;
3034 qc->tf.protocol = ATAPI_PROT_DMA;
3035 qc->tf.feature |= ATAPI_PKT_DMA;
3037 if ((dev->flags & ATA_DFLAG_DMADIR) &&
3038 (scmd->sc_data_direction != DMA_TO_DEVICE))
3039 /* some SATA bridges need us to indicate data xfer direction */
3040 qc->tf.feature |= ATAPI_DMADIR;
3044 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
3045 as ATAPI tape drives don't get this right otherwise */
3049 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
3051 if (!sata_pmp_attached(ap)) {
3052 if (likely(devno < ata_link_max_devices(&ap->link)))
3053 return &ap->link.device[devno];
3055 if (likely(devno < ap->nr_pmp_links))
3056 return &ap->pmp_link[devno].device[0];
3062 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
3063 const struct scsi_device *scsidev)
3067 /* skip commands not addressed to targets we simulate */
3068 if (!sata_pmp_attached(ap)) {
3069 if (unlikely(scsidev->channel || scsidev->lun))
3071 devno = scsidev->id;
3073 if (unlikely(scsidev->id || scsidev->lun))
3075 devno = scsidev->channel;
3078 return ata_find_dev(ap, devno);
3082 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
3083 * @ap: ATA port to which the device is attached
3084 * @scsidev: SCSI device from which we derive the ATA device
3086 * Given various information provided in struct scsi_cmnd,
3087 * map that onto an ATA bus, and using that mapping
3088 * determine which ata_device is associated with the
3089 * SCSI command to be sent.
3092 * spin_lock_irqsave(host lock)
3095 * Associated ATA device, or %NULL if not found.
3097 static struct ata_device *
3098 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
3100 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
3102 if (unlikely(!dev || !ata_dev_enabled(dev)))
3109 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
3110 * @byte1: Byte 1 from pass-thru CDB.
3113 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
3116 ata_scsi_map_proto(u8 byte1)
3118 switch((byte1 & 0x1e) >> 1) {
3119 case 3: /* Non-data */
3120 return ATA_PROT_NODATA;
3123 case 10: /* UDMA Data-in */
3124 case 11: /* UDMA Data-Out */
3125 return ATA_PROT_DMA;
3127 case 4: /* PIO Data-in */
3128 case 5: /* PIO Data-out */
3129 return ATA_PROT_PIO;
3131 case 12: /* FPDMA */
3132 return ATA_PROT_NCQ;
3134 case 0: /* Hard Reset */
3136 case 8: /* Device Diagnostic */
3137 case 9: /* Device Reset */
3138 case 7: /* DMA Queued */
3139 case 15: /* Return Response Info */
3140 default: /* Reserved */
3144 return ATA_PROT_UNKNOWN;
3148 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
3149 * @qc: command structure to be initialized
3151 * Handles either 12 or 16-byte versions of the CDB.
3154 * Zero on success, non-zero on failure.
3156 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
3158 struct ata_taskfile *tf = &(qc->tf);
3159 struct scsi_cmnd *scmd = qc->scsicmd;
3160 struct ata_device *dev = qc->dev;
3161 const u8 *cdb = scmd->cmnd;
3164 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) {
3169 if (ata_is_ncq(tf->protocol) && (cdb[2] & 0x3) == 0)
3170 tf->protocol = ATA_PROT_NCQ_NODATA;
3173 tf->flags |= ATA_TFLAG_LBA;
3176 * 12 and 16 byte CDBs use different offsets to
3177 * provide the various register values.
3179 if (cdb[0] == ATA_16) {
3181 * 16-byte CDB - may contain extended commands.
3183 * If that is the case, copy the upper byte register values.
3185 if (cdb[1] & 0x01) {
3186 tf->hob_feature = cdb[3];
3187 tf->hob_nsect = cdb[5];
3188 tf->hob_lbal = cdb[7];
3189 tf->hob_lbam = cdb[9];
3190 tf->hob_lbah = cdb[11];
3191 tf->flags |= ATA_TFLAG_LBA48;
3193 tf->flags &= ~ATA_TFLAG_LBA48;
3196 * Always copy low byte, device and command registers.
3198 tf->feature = cdb[4];
3203 tf->device = cdb[13];
3204 tf->command = cdb[14];
3207 * 12-byte CDB - incapable of extended commands.
3209 tf->flags &= ~ATA_TFLAG_LBA48;
3211 tf->feature = cdb[3];
3216 tf->device = cdb[8];
3217 tf->command = cdb[9];
3220 /* For NCQ commands copy the tag value */
3221 if (ata_is_ncq(tf->protocol))
3222 tf->nsect = qc->tag << 3;
3224 /* enforce correct master/slave bit */
3225 tf->device = dev->devno ?
3226 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
3228 switch (tf->command) {
3229 /* READ/WRITE LONG use a non-standard sect_size */
3230 case ATA_CMD_READ_LONG:
3231 case ATA_CMD_READ_LONG_ONCE:
3232 case ATA_CMD_WRITE_LONG:
3233 case ATA_CMD_WRITE_LONG_ONCE:
3234 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) {
3238 qc->sect_size = scsi_bufflen(scmd);
3241 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3242 case ATA_CMD_CFA_WRITE_NE:
3243 case ATA_CMD_CFA_TRANS_SECT:
3244 case ATA_CMD_CFA_WRITE_MULT_NE:
3245 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3247 case ATA_CMD_READ_EXT:
3248 case ATA_CMD_READ_QUEUED:
3249 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3250 case ATA_CMD_FPDMA_READ:
3251 case ATA_CMD_READ_MULTI:
3252 case ATA_CMD_READ_MULTI_EXT:
3253 case ATA_CMD_PIO_READ:
3254 case ATA_CMD_PIO_READ_EXT:
3255 case ATA_CMD_READ_STREAM_DMA_EXT:
3256 case ATA_CMD_READ_STREAM_EXT:
3257 case ATA_CMD_VERIFY:
3258 case ATA_CMD_VERIFY_EXT:
3260 case ATA_CMD_WRITE_EXT:
3261 case ATA_CMD_WRITE_FUA_EXT:
3262 case ATA_CMD_WRITE_QUEUED:
3263 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
3264 case ATA_CMD_FPDMA_WRITE:
3265 case ATA_CMD_WRITE_MULTI:
3266 case ATA_CMD_WRITE_MULTI_EXT:
3267 case ATA_CMD_WRITE_MULTI_FUA_EXT:
3268 case ATA_CMD_PIO_WRITE:
3269 case ATA_CMD_PIO_WRITE_EXT:
3270 case ATA_CMD_WRITE_STREAM_DMA_EXT:
3271 case ATA_CMD_WRITE_STREAM_EXT:
3272 qc->sect_size = scmd->device->sector_size;
3275 /* Everything else uses 512 byte "sectors" */
3277 qc->sect_size = ATA_SECT_SIZE;
3281 * Set flags so that all registers will be written, pass on
3282 * write indication (used for PIO/DMA setup), result TF is
3283 * copied back and we don't whine too much about its failure.
3285 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3286 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3287 tf->flags |= ATA_TFLAG_WRITE;
3289 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3292 * Set transfer length.
3294 * TODO: find out if we need to do more here to
3295 * cover scatter/gather case.
3297 ata_qc_set_pc_nbytes(qc);
3299 /* We may not issue DMA commands if no DMA mode is set */
3300 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) {
3305 /* sanity check for pio multi commands */
3306 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) {
3311 if (is_multi_taskfile(tf)) {
3312 unsigned int multi_count = 1 << (cdb[1] >> 5);
3314 /* compare the passed through multi_count
3315 * with the cached multi_count of libata
3317 if (multi_count != dev->multi_count)
3318 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3323 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3324 * SET_FEATURES - XFER MODE must be preceded/succeeded
3325 * by an update to hardware-specific registers for each
3326 * controller (i.e. the reason for ->set_piomode(),
3327 * ->set_dmamode(), and ->post_set_mode() hooks).
3329 if (tf->command == ATA_CMD_SET_FEATURES &&
3330 tf->feature == SETFEATURES_XFER) {
3331 fp = (cdb[0] == ATA_16) ? 4 : 3;
3336 * Filter TPM commands by default. These provide an
3337 * essentially uncontrolled encrypted "back door" between
3338 * applications and the disk. Set libata.allow_tpm=1 if you
3339 * have a real reason for wanting to use them. This ensures
3340 * that installed software cannot easily mess stuff up without
3341 * user intent. DVR type users will probably ship with this enabled
3342 * for movie content management.
3344 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3345 * for this and should do in future but that it is not sufficient as
3346 * DCS is an optional feature set. Thus we also do the software filter
3347 * so that we comply with the TC consortium stated goal that the user
3348 * can turn off TC features of their system.
3350 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) {
3351 fp = (cdb[0] == ATA_16) ? 14 : 9;
3358 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff);
3363 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim
3364 * @cmd: SCSI command being translated
3365 * @trmax: Maximum number of entries that will fit in sector_size bytes.
3366 * @sector: Starting sector
3367 * @count: Total Range of request in logical sectors
3369 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted
3372 * Upto 64 entries of the format:
3373 * 63:48 Range Length
3376 * Range Length of 0 is ignored.
3377 * LBA's should be sorted order and not overlap.
3379 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET
3381 * Return: Number of bytes copied into sglist.
3383 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax,
3384 u64 sector, u32 count)
3386 struct scsi_device *sdp = cmd->device;
3387 size_t len = sdp->sector_size;
3391 unsigned long flags;
3393 WARN_ON(len > ATA_SCSI_RBUF_SIZE);
3395 if (len > ATA_SCSI_RBUF_SIZE)
3396 len = ATA_SCSI_RBUF_SIZE;
3398 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
3399 buf = ((void *)ata_scsi_rbuf);
3400 memset(buf, 0, len);
3402 u64 entry = sector |
3403 ((u64)(count > 0xffff ? 0xffff : count) << 48);
3404 buf[i++] = __cpu_to_le64(entry);
3405 if (count <= 0xffff)
3410 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len);
3411 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
3417 * ata_format_dsm_trim_descr() - SATL Write Same to ATA SCT Write Same
3418 * @cmd: SCSI command being translated
3419 * @lba: Starting sector
3420 * @num: Number of sectors to be zero'd.
3422 * Rewrite the WRITE SAME payload to be an SCT Write Same formatted
3424 * NOTE: Writes a pattern (0's) in the foreground.
3426 * Return: Number of bytes copied into sglist.
3428 static size_t ata_format_sct_write_same(struct scsi_cmnd *cmd, u64 lba, u64 num)
3430 struct scsi_device *sdp = cmd->device;
3431 size_t len = sdp->sector_size;
3434 unsigned long flags;
3436 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
3437 buf = ((void *)ata_scsi_rbuf);
3439 put_unaligned_le16(0x0002, &buf[0]); /* SCT_ACT_WRITE_SAME */
3440 put_unaligned_le16(0x0101, &buf[1]); /* WRITE PTRN FG */
3441 put_unaligned_le64(lba, &buf[2]);
3442 put_unaligned_le64(num, &buf[6]);
3443 put_unaligned_le32(0u, &buf[10]); /* pattern */
3445 WARN_ON(len > ATA_SCSI_RBUF_SIZE);
3447 if (len > ATA_SCSI_RBUF_SIZE)
3448 len = ATA_SCSI_RBUF_SIZE;
3450 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len);
3451 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
3457 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same
3458 * @qc: Command to be translated
3460 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or
3461 * an SCT Write Same command.
3462 * Based on WRITE SAME has the UNMAP flag
3463 * When set translate to DSM TRIM
3464 * When clear translate to SCT Write Same
3466 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3468 struct ata_taskfile *tf = &qc->tf;
3469 struct scsi_cmnd *scmd = qc->scsicmd;
3470 struct scsi_device *sdp = scmd->device;
3471 size_t len = sdp->sector_size;
3472 struct ata_device *dev = qc->dev;
3473 const u8 *cdb = scmd->cmnd;
3476 const u32 trmax = len >> 3;
3480 u8 unmap = cdb[1] & 0x8;
3482 /* we may not issue DMA commands if no DMA mode is set */
3483 if (unlikely(!dev->dma_mode))
3484 goto invalid_opcode;
3486 if (unlikely(scmd->cmd_len < 16)) {
3490 scsi_16_lba_len(cdb, &block, &n_block);
3493 /* If trim is not enabled the cmd is invalid. */
3494 if ((dev->horkage & ATA_HORKAGE_NOTRIM) ||
3495 !ata_id_has_trim(dev->id)) {
3500 /* If the request is too large the cmd is invalid */
3501 if (n_block > 0xffff * trmax) {
3506 /* If write same is not available the cmd is invalid */
3507 if (!ata_id_sct_write_same(dev->id)) {
3515 * WRITE SAME always has a sector sized buffer as payload, this
3516 * should never be a multiple entry S/G list.
3518 if (!scsi_sg_count(scmd))
3519 goto invalid_param_len;
3522 * size must match sector size in bytes
3523 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count)
3524 * is defined as number of 512 byte blocks to be transferred.
3527 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block);
3529 goto invalid_param_len;
3531 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3532 /* Newer devices support queued TRIM commands */
3533 tf->protocol = ATA_PROT_NCQ;
3534 tf->command = ATA_CMD_FPDMA_SEND;
3535 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3536 tf->nsect = qc->tag << 3;
3537 tf->hob_feature = (size / 512) >> 8;
3538 tf->feature = size / 512;
3542 tf->protocol = ATA_PROT_DMA;
3543 tf->hob_feature = 0;
3544 tf->feature = ATA_DSM_TRIM;
3545 tf->hob_nsect = (size / 512) >> 8;
3546 tf->nsect = size / 512;
3547 tf->command = ATA_CMD_DSM;
3550 size = ata_format_sct_write_same(scmd, block, n_block);
3552 goto invalid_param_len;
3554 tf->hob_feature = 0;
3560 tf->lbal = ATA_CMD_STANDBYNOW1;
3564 tf->device = ATA_CMD_STANDBYNOW1;
3565 tf->protocol = ATA_PROT_DMA;
3566 tf->command = ATA_CMD_WRITE_LOG_DMA_EXT;
3567 if (unlikely(dev->flags & ATA_DFLAG_PIO))
3568 tf->command = ATA_CMD_WRITE_LOG_EXT;
3571 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3574 ata_qc_set_pc_nbytes(qc);
3579 ata_scsi_set_invalid_field(dev, scmd, fp, bp);
3582 /* "Parameter list length error" */
3583 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3586 /* "Invalid command operation code" */
3587 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0);
3592 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN
3593 * @args: device MAINTENANCE_IN data / SCSI command of interest.
3594 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
3596 * Yields a subset to satisfy scsi_report_opcode()
3599 * spin_lock_irqsave(host lock)
3601 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf)
3603 struct ata_device *dev = args->dev;
3604 u8 *cdb = args->cmd->cmnd;
3606 unsigned int err = 0;
3609 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]);
3618 case SERVICE_ACTION_IN_16:
3621 case SYNCHRONIZE_CACHE:
3625 case TEST_UNIT_READY:
3626 case SEND_DIAGNOSTIC:
3627 case MAINTENANCE_IN:
3639 case MODE_SELECT_10:
3644 if (!ata_id_sct_write_same(dev->id))
3646 /* fallthrough: if SCT ... only enable for ZBC */
3649 if (ata_id_zoned_cap(dev->id) ||
3650 dev->class == ATA_DEV_ZAC)
3657 rbuf[1] = supported; /* supported */
3662 * ata_scsi_report_zones_complete - convert ATA output
3663 * @qc: command structure returning the data
3665 * Convert T-13 little-endian field representation into
3666 * T-10 big-endian field representation.
3669 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc)
3671 struct scsi_cmnd *scmd = qc->scsicmd;
3672 struct sg_mapping_iter miter;
3673 unsigned long flags;
3674 unsigned int bytes = 0;
3676 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd),
3677 SG_MITER_TO_SG | SG_MITER_ATOMIC);
3679 local_irq_save(flags);
3680 while (sg_miter_next(&miter)) {
3681 unsigned int offset = 0;
3686 u64 max_lba, opt_lba;
3689 /* Swizzle header */
3691 list_length = get_unaligned_le32(&hdr[0]);
3692 same = get_unaligned_le16(&hdr[4]);
3693 max_lba = get_unaligned_le64(&hdr[8]);
3694 opt_lba = get_unaligned_le64(&hdr[16]);
3695 put_unaligned_be32(list_length, &hdr[0]);
3696 hdr[4] = same & 0xf;
3697 put_unaligned_be64(max_lba, &hdr[8]);
3698 put_unaligned_be64(opt_lba, &hdr[16]);
3702 while (offset < miter.length) {
3704 u8 cond, type, non_seq, reset;
3705 u64 size, start, wp;
3707 /* Swizzle zone descriptor */
3708 rec = miter.addr + offset;
3709 type = rec[0] & 0xf;
3710 cond = (rec[1] >> 4) & 0xf;
3711 non_seq = (rec[1] & 2);
3712 reset = (rec[1] & 1);
3713 size = get_unaligned_le64(&rec[8]);
3714 start = get_unaligned_le64(&rec[16]);
3715 wp = get_unaligned_le64(&rec[24]);
3717 rec[1] = (cond << 4) | non_seq | reset;
3718 put_unaligned_be64(size, &rec[8]);
3719 put_unaligned_be64(start, &rec[16]);
3720 put_unaligned_be64(wp, &rec[24]);
3721 WARN_ON(offset + 64 > miter.length);
3726 sg_miter_stop(&miter);
3727 local_irq_restore(flags);
3729 ata_scsi_qc_complete(qc);
3732 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc)
3734 struct ata_taskfile *tf = &qc->tf;
3735 struct scsi_cmnd *scmd = qc->scsicmd;
3736 const u8 *cdb = scmd->cmnd;
3737 u16 sect, fp = (u16)-1;
3738 u8 sa, options, bp = 0xff;
3742 if (unlikely(scmd->cmd_len < 16)) {
3743 ata_dev_warn(qc->dev, "invalid cdb length %d\n",
3748 scsi_16_lba_len(cdb, &block, &n_block);
3749 if (n_block != scsi_bufflen(scmd)) {
3750 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n",
3751 n_block, scsi_bufflen(scmd));
3752 goto invalid_param_len;
3755 if (sa != ZI_REPORT_ZONES) {
3756 ata_dev_warn(qc->dev, "invalid service action %d\n", sa);
3761 * ZAC allows only for transfers in 512 byte blocks,
3762 * and uses a 16 bit value for the transfer count.
3764 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) {
3765 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block);
3766 goto invalid_param_len;
3768 sect = n_block / 512;
3769 options = cdb[14] & 0xbf;
3771 if (ata_ncq_enabled(qc->dev) &&
3772 ata_fpdma_zac_mgmt_in_supported(qc->dev)) {
3773 tf->protocol = ATA_PROT_NCQ;
3774 tf->command = ATA_CMD_FPDMA_RECV;
3775 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f;
3776 tf->nsect = qc->tag << 3;
3777 tf->feature = sect & 0xff;
3778 tf->hob_feature = (sect >> 8) & 0xff;
3779 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8);
3781 tf->command = ATA_CMD_ZAC_MGMT_IN;
3782 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES;
3783 tf->protocol = ATA_PROT_DMA;
3784 tf->hob_feature = options;
3785 tf->hob_nsect = (sect >> 8) & 0xff;
3786 tf->nsect = sect & 0xff;
3788 tf->device = ATA_LBA;
3789 tf->lbah = (block >> 16) & 0xff;
3790 tf->lbam = (block >> 8) & 0xff;
3791 tf->lbal = block & 0xff;
3792 tf->hob_lbah = (block >> 40) & 0xff;
3793 tf->hob_lbam = (block >> 32) & 0xff;
3794 tf->hob_lbal = (block >> 24) & 0xff;
3796 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3797 qc->flags |= ATA_QCFLAG_RESULT_TF;
3799 ata_qc_set_pc_nbytes(qc);
3801 qc->complete_fn = ata_scsi_report_zones_complete;
3806 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
3810 /* "Parameter list length error" */
3811 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3815 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc)
3817 struct ata_taskfile *tf = &qc->tf;
3818 struct scsi_cmnd *scmd = qc->scsicmd;
3819 struct ata_device *dev = qc->dev;
3820 const u8 *cdb = scmd->cmnd;
3826 if (unlikely(scmd->cmd_len < 16)) {
3832 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) &&
3833 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) {
3838 scsi_16_lba_len(cdb, &block, &n_block);
3841 * ZAC MANAGEMENT OUT doesn't define any length
3843 goto invalid_param_len;
3845 if (block > dev->n_sectors)
3848 all = cdb[14] & 0x1;
3850 if (ata_ncq_enabled(qc->dev) &&
3851 ata_fpdma_zac_mgmt_out_supported(qc->dev)) {
3852 tf->protocol = ATA_PROT_NCQ_NODATA;
3853 tf->command = ATA_CMD_NCQ_NON_DATA;
3854 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT;
3855 tf->nsect = qc->tag << 3;
3856 tf->auxiliary = sa | ((u16)all << 8);
3858 tf->protocol = ATA_PROT_NODATA;
3859 tf->command = ATA_CMD_ZAC_MGMT_OUT;
3861 tf->hob_feature = all;
3863 tf->lbah = (block >> 16) & 0xff;
3864 tf->lbam = (block >> 8) & 0xff;
3865 tf->lbal = block & 0xff;
3866 tf->hob_lbah = (block >> 40) & 0xff;
3867 tf->hob_lbam = (block >> 32) & 0xff;
3868 tf->hob_lbal = (block >> 24) & 0xff;
3869 tf->device = ATA_LBA;
3870 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3875 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
3878 /* "Logical Block Address out of range" */
3879 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x00);
3882 /* "Parameter list length error" */
3883 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3888 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3889 * @qc: Storage for translated ATA taskfile
3890 * @buf: input buffer
3891 * @len: number of valid bytes in the input buffer
3892 * @fp: out parameter for the failed field on error
3894 * Prepare a taskfile to modify caching information for the device.
3899 static int ata_mselect_caching(struct ata_queued_cmd *qc,
3900 const u8 *buf, int len, u16 *fp)
3902 struct ata_taskfile *tf = &qc->tf;
3903 struct ata_device *dev = qc->dev;
3904 u8 mpage[CACHE_MPAGE_LEN];
3909 * The first two bytes of def_cache_mpage are a header, so offsets
3910 * in mpage are off by 2 compared to buf. Same for len.
3913 if (len != CACHE_MPAGE_LEN - 2) {
3914 if (len < CACHE_MPAGE_LEN - 2)
3917 *fp = CACHE_MPAGE_LEN - 2;
3921 wce = buf[0] & (1 << 2);
3924 * Check that read-only bits are not modified.
3926 ata_msense_caching(dev->id, mpage, false);
3927 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) {
3930 if (mpage[i + 2] != buf[i]) {
3936 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3937 tf->protocol = ATA_PROT_NODATA;
3939 tf->command = ATA_CMD_SET_FEATURES;
3940 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3945 * ata_mselect_control - Simulate MODE SELECT for control page
3946 * @qc: Storage for translated ATA taskfile
3947 * @buf: input buffer
3948 * @len: number of valid bytes in the input buffer
3949 * @fp: out parameter for the failed field on error
3951 * Prepare a taskfile to modify caching information for the device.
3956 static int ata_mselect_control(struct ata_queued_cmd *qc,
3957 const u8 *buf, int len, u16 *fp)
3959 struct ata_device *dev = qc->dev;
3960 u8 mpage[CONTROL_MPAGE_LEN];
3965 * The first two bytes of def_control_mpage are a header, so offsets
3966 * in mpage are off by 2 compared to buf. Same for len.
3969 if (len != CONTROL_MPAGE_LEN - 2) {
3970 if (len < CONTROL_MPAGE_LEN - 2)
3973 *fp = CONTROL_MPAGE_LEN - 2;
3977 d_sense = buf[0] & (1 << 2);
3980 * Check that read-only bits are not modified.
3982 ata_msense_control(dev, mpage, false);
3983 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) {
3986 if (mpage[2 + i] != buf[i]) {
3991 if (d_sense & (1 << 2))
3992 dev->flags |= ATA_DFLAG_D_SENSE;
3994 dev->flags &= ~ATA_DFLAG_D_SENSE;
3999 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
4000 * @qc: Storage for translated ATA taskfile
4002 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
4003 * Assume this is invoked for direct access devices (e.g. disks) only.
4004 * There should be no block descriptor for other device types.
4007 * spin_lock_irqsave(host lock)
4009 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
4011 struct scsi_cmnd *scmd = qc->scsicmd;
4012 const u8 *cdb = scmd->cmnd;
4015 unsigned six_byte, pg_len, hdr_len, bd_len;
4022 six_byte = (cdb[0] == MODE_SELECT);
4024 if (scmd->cmd_len < 5) {
4032 if (scmd->cmd_len < 9) {
4037 len = (cdb[7] << 8) + cdb[8];
4041 /* We only support PF=1, SP=0. */
4042 if ((cdb[1] & 0x11) != 0x10) {
4044 bp = (cdb[1] & 0x01) ? 1 : 5;
4048 /* Test early for possible overrun. */
4049 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
4050 goto invalid_param_len;
4052 p = page_address(sg_page(scsi_sglist(scmd)));
4054 /* Move past header and block descriptors. */
4056 goto invalid_param_len;
4061 bd_len = (p[6] << 8) + p[7];
4066 goto invalid_param_len;
4067 if (bd_len != 0 && bd_len != 8) {
4068 fp = (six_byte) ? 3 : 6;
4069 fp += bd_len + hdr_len;
4078 /* Parse both possible formats for the mode page headers. */
4082 goto invalid_param_len;
4085 pg_len = (p[2] << 8) | p[3];
4090 goto invalid_param_len;
4099 * No mode subpages supported (yet) but asking for _all_
4100 * subpages may be valid
4102 if (spg && (spg != ALL_SUB_MPAGES)) {
4103 fp = (p[0] & 0x40) ? 1 : 0;
4104 fp += hdr_len + bd_len;
4108 goto invalid_param_len;
4112 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) {
4113 fp += hdr_len + bd_len;
4118 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) {
4119 fp += hdr_len + bd_len;
4122 goto skip; /* No ATA command to send */
4125 default: /* invalid page code */
4126 fp = bd_len + hdr_len;
4131 * Only one page has changeable data, so we only support setting one
4140 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
4144 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp);
4148 /* "Parameter list length error" */
4149 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
4153 scmd->result = SAM_STAT_GOOD;
4158 * ata_get_xlat_func - check if SCSI to ATA translation is possible
4160 * @cmd: SCSI command opcode to consider
4162 * Look up the SCSI command given, and determine whether the
4163 * SCSI command is to be translated or simulated.
4166 * Pointer to translation function if possible, %NULL if not.
4169 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
4179 return ata_scsi_rw_xlat;
4182 return ata_scsi_write_same_xlat;
4184 case SYNCHRONIZE_CACHE:
4185 if (ata_try_flush_cache(dev))
4186 return ata_scsi_flush_xlat;
4191 return ata_scsi_verify_xlat;
4195 return ata_scsi_pass_thru;
4198 case MODE_SELECT_10:
4199 return ata_scsi_mode_select_xlat;
4203 return ata_scsi_zbc_in_xlat;
4206 return ata_scsi_zbc_out_xlat;
4209 return ata_scsi_start_stop_xlat;
4216 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
4217 * @ap: ATA port to which the command was being sent
4218 * @cmd: SCSI command to dump
4220 * Prints the contents of a SCSI command via printk().
4223 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
4224 struct scsi_cmnd *cmd)
4227 struct scsi_device *scsidev = cmd->device;
4229 DPRINTK("CDB (%u:%d,%d,%d) %9ph\n",
4231 scsidev->channel, scsidev->id, scsidev->lun,
4236 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
4237 struct ata_device *dev)
4239 u8 scsi_op = scmd->cmnd[0];
4240 ata_xlat_func_t xlat_func;
4243 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
4244 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
4247 xlat_func = ata_get_xlat_func(dev, scsi_op);
4249 if (unlikely(!scmd->cmd_len))
4253 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
4254 /* relay SCSI command to ATAPI device */
4255 int len = COMMAND_SIZE(scsi_op);
4256 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
4259 xlat_func = atapi_xlat;
4261 /* ATA_16 passthru, treat as an ATA command */
4262 if (unlikely(scmd->cmd_len > 16))
4265 xlat_func = ata_get_xlat_func(dev, scsi_op);
4270 rc = ata_scsi_translate(dev, scmd, xlat_func);
4272 ata_scsi_simulate(dev, scmd);
4277 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
4278 scmd->cmd_len, scsi_op, dev->cdb_len);
4279 scmd->result = DID_ERROR << 16;
4280 scmd->scsi_done(scmd);
4285 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
4286 * @shost: SCSI host of command to be sent
4287 * @cmd: SCSI command to be sent
4289 * In some cases, this function translates SCSI commands into
4290 * ATA taskfiles, and queues the taskfiles to be sent to
4291 * hardware. In other cases, this function simulates a
4292 * SCSI device by evaluating and responding to certain
4293 * SCSI commands. This creates the overall effect of
4294 * ATA and ATAPI devices appearing as SCSI devices.
4300 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4303 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
4305 struct ata_port *ap;
4306 struct ata_device *dev;
4307 struct scsi_device *scsidev = cmd->device;
4309 unsigned long irq_flags;
4311 ap = ata_shost_to_port(shost);
4313 spin_lock_irqsave(ap->lock, irq_flags);
4315 ata_scsi_dump_cdb(ap, cmd);
4317 dev = ata_scsi_find_dev(ap, scsidev);
4319 rc = __ata_scsi_queuecmd(cmd, dev);
4321 cmd->result = (DID_BAD_TARGET << 16);
4322 cmd->scsi_done(cmd);
4325 spin_unlock_irqrestore(ap->lock, irq_flags);
4331 * ata_scsi_simulate - simulate SCSI command on ATA device
4332 * @dev: the target device
4333 * @cmd: SCSI command being sent to device.
4335 * Interprets and directly executes a select list of SCSI commands
4336 * that can be handled internally.
4339 * spin_lock_irqsave(host lock)
4342 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
4344 struct ata_scsi_args args;
4345 const u8 *scsicmd = cmd->cmnd;
4352 switch(scsicmd[0]) {
4354 if (scsicmd[1] & 2) /* is CmdDt set? */
4355 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4356 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
4357 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
4358 else switch (scsicmd[2]) {
4360 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
4363 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
4366 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
4369 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
4372 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
4375 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
4378 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
4381 if (dev->flags & ATA_DFLAG_ZAC) {
4382 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6);
4387 ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
4394 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
4398 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4401 case SERVICE_ACTION_IN_16:
4402 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
4403 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4405 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4409 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
4413 ata_scsi_set_sense(dev, cmd, 0, 0, 0);
4414 cmd->result = (DRIVER_SENSE << 24);
4417 /* if we reach this, then writeback caching is disabled,
4418 * turning this into a no-op.
4420 case SYNCHRONIZE_CACHE:
4423 /* no-op's, complete with success */
4427 case TEST_UNIT_READY:
4428 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
4431 case SEND_DIAGNOSTIC:
4432 tmp8 = scsicmd[1] & ~(1 << 3);
4433 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
4434 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
4436 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4439 case MAINTENANCE_IN:
4440 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES)
4441 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in);
4443 ata_scsi_set_invalid_field(dev, cmd, 1, 0xff);
4446 /* all other commands */
4448 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0);
4449 /* "Invalid command operation code" */
4453 cmd->scsi_done(cmd);
4456 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
4460 for (i = 0; i < host->n_ports; i++) {
4461 struct ata_port *ap = host->ports[i];
4462 struct Scsi_Host *shost;
4465 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
4469 shost->eh_noresume = 1;
4470 *(struct ata_port **)&shost->hostdata[0] = ap;
4471 ap->scsi_host = shost;
4473 shost->transportt = ata_scsi_transport_template;
4474 shost->unique_id = ap->print_id;
4477 shost->max_channel = 1;
4478 shost->max_cmd_len = 16;
4480 /* Schedule policy is determined by ->qc_defer()
4481 * callback and it needs to see every deferred qc.
4482 * Set host_blocked to 1 to prevent SCSI midlayer from
4483 * automatically deferring requests.
4485 shost->max_host_blocked = 1;
4487 rc = scsi_add_host_with_dma(ap->scsi_host,
4488 &ap->tdev, ap->host->dev);
4496 scsi_host_put(host->ports[i]->scsi_host);
4499 struct Scsi_Host *shost = host->ports[i]->scsi_host;
4501 scsi_remove_host(shost);
4502 scsi_host_put(shost);
4507 void ata_scsi_scan_host(struct ata_port *ap, int sync)
4510 struct ata_device *last_failed_dev = NULL;
4511 struct ata_link *link;
4512 struct ata_device *dev;
4515 ata_for_each_link(link, ap, EDGE) {
4516 ata_for_each_dev(dev, link, ENABLED) {
4517 struct scsi_device *sdev;
4518 int channel = 0, id = 0;
4523 if (ata_is_host_link(link))
4526 channel = link->pmp;
4528 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
4530 if (!IS_ERR(sdev)) {
4532 scsi_device_put(sdev);
4539 /* If we scanned while EH was in progress or allocation
4540 * failure occurred, scan would have failed silently. Check
4541 * whether all devices are attached.
4543 ata_for_each_link(link, ap, EDGE) {
4544 ata_for_each_dev(dev, link, ENABLED) {
4553 /* we're missing some SCSI devices */
4555 /* If caller requested synchrnous scan && we've made
4556 * any progress, sleep briefly and repeat.
4558 if (dev != last_failed_dev) {
4560 last_failed_dev = dev;
4564 /* We might be failing to detect boot device, give it
4565 * a few more chances.
4573 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
4576 queue_delayed_work(system_long_wq, &ap->hotplug_task,
4577 round_jiffies_relative(HZ));
4581 * ata_scsi_offline_dev - offline attached SCSI device
4582 * @dev: ATA device to offline attached SCSI device for
4584 * This function is called from ata_eh_hotplug() and responsible
4585 * for taking the SCSI device attached to @dev offline. This
4586 * function is called with host lock which protects dev->sdev
4590 * spin_lock_irqsave(host lock)
4593 * 1 if attached SCSI device exists, 0 otherwise.
4595 int ata_scsi_offline_dev(struct ata_device *dev)
4598 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
4605 * ata_scsi_remove_dev - remove attached SCSI device
4606 * @dev: ATA device to remove attached SCSI device for
4608 * This function is called from ata_eh_scsi_hotplug() and
4609 * responsible for removing the SCSI device attached to @dev.
4612 * Kernel thread context (may sleep).
4614 static void ata_scsi_remove_dev(struct ata_device *dev)
4616 struct ata_port *ap = dev->link->ap;
4617 struct scsi_device *sdev;
4618 unsigned long flags;
4620 /* Alas, we need to grab scan_mutex to ensure SCSI device
4621 * state doesn't change underneath us and thus
4622 * scsi_device_get() always succeeds. The mutex locking can
4623 * be removed if there is __scsi_device_get() interface which
4624 * increments reference counts regardless of device state.
4626 mutex_lock(&ap->scsi_host->scan_mutex);
4627 spin_lock_irqsave(ap->lock, flags);
4629 /* clearing dev->sdev is protected by host lock */
4634 /* If user initiated unplug races with us, sdev can go
4635 * away underneath us after the host lock and
4636 * scan_mutex are released. Hold onto it.
4638 if (scsi_device_get(sdev) == 0) {
4639 /* The following ensures the attached sdev is
4640 * offline on return from ata_scsi_offline_dev()
4641 * regardless it wins or loses the race
4642 * against this function.
4644 scsi_device_set_state(sdev, SDEV_OFFLINE);
4651 spin_unlock_irqrestore(ap->lock, flags);
4652 mutex_unlock(&ap->scsi_host->scan_mutex);
4655 ata_dev_info(dev, "detaching (SCSI %s)\n",
4656 dev_name(&sdev->sdev_gendev));
4658 scsi_remove_device(sdev);
4659 scsi_device_put(sdev);
4663 static void ata_scsi_handle_link_detach(struct ata_link *link)
4665 struct ata_port *ap = link->ap;
4666 struct ata_device *dev;
4668 ata_for_each_dev(dev, link, ALL) {
4669 unsigned long flags;
4671 if (!(dev->flags & ATA_DFLAG_DETACHED))
4674 spin_lock_irqsave(ap->lock, flags);
4675 dev->flags &= ~ATA_DFLAG_DETACHED;
4676 spin_unlock_irqrestore(ap->lock, flags);
4678 if (zpodd_dev_enabled(dev))
4681 ata_scsi_remove_dev(dev);
4686 * ata_scsi_media_change_notify - send media change event
4687 * @dev: Pointer to the disk device with media change event
4689 * Tell the block layer to send a media change notification
4693 * spin_lock_irqsave(host lock)
4695 void ata_scsi_media_change_notify(struct ata_device *dev)
4698 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
4703 * ata_scsi_hotplug - SCSI part of hotplug
4704 * @work: Pointer to ATA port to perform SCSI hotplug on
4706 * Perform SCSI part of hotplug. It's executed from a separate
4707 * workqueue after EH completes. This is necessary because SCSI
4708 * hot plugging requires working EH and hot unplugging is
4709 * synchronized with hot plugging with a mutex.
4712 * Kernel thread context (may sleep).
4714 void ata_scsi_hotplug(struct work_struct *work)
4716 struct ata_port *ap =
4717 container_of(work, struct ata_port, hotplug_task.work);
4720 if (ap->pflags & ATA_PFLAG_UNLOADING) {
4721 DPRINTK("ENTER/EXIT - unloading\n");
4728 * The block layer suspend/resume path is fundamentally broken due
4729 * to freezable kthreads and workqueue and may deadlock if a block
4730 * device gets removed while resume is in progress. I don't know
4731 * what the solution is short of removing freezable kthreads and
4732 * workqueues altogether.
4734 * The following is an ugly hack to avoid kicking off device
4735 * removal while freezer is active. This is a joke but does avoid
4736 * this particular deadlock scenario.
4738 * https://bugzilla.kernel.org/show_bug.cgi?id=62801
4739 * http://marc.info/?l=linux-kernel&m=138695698516487
4741 #ifdef CONFIG_FREEZER
4747 mutex_lock(&ap->scsi_scan_mutex);
4749 /* Unplug detached devices. We cannot use link iterator here
4750 * because PMP links have to be scanned even if PMP is
4751 * currently not attached. Iterate manually.
4753 ata_scsi_handle_link_detach(&ap->link);
4755 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
4756 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
4758 /* scan for new ones */
4759 ata_scsi_scan_host(ap, 0);
4761 mutex_unlock(&ap->scsi_scan_mutex);
4766 * ata_scsi_user_scan - indication for user-initiated bus scan
4767 * @shost: SCSI host to scan
4768 * @channel: Channel to scan
4772 * This function is called when user explicitly requests bus
4773 * scan. Set probe pending flag and invoke EH.
4776 * SCSI layer (we don't care)
4781 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
4782 unsigned int id, u64 lun)
4784 struct ata_port *ap = ata_shost_to_port(shost);
4785 unsigned long flags;
4788 if (!ap->ops->error_handler)
4791 if (lun != SCAN_WILD_CARD && lun)
4794 if (!sata_pmp_attached(ap)) {
4795 if (channel != SCAN_WILD_CARD && channel)
4799 if (id != SCAN_WILD_CARD && id)
4804 spin_lock_irqsave(ap->lock, flags);
4806 if (devno == SCAN_WILD_CARD) {
4807 struct ata_link *link;
4809 ata_for_each_link(link, ap, EDGE) {
4810 struct ata_eh_info *ehi = &link->eh_info;
4811 ehi->probe_mask |= ATA_ALL_DEVICES;
4812 ehi->action |= ATA_EH_RESET;
4815 struct ata_device *dev = ata_find_dev(ap, devno);
4818 struct ata_eh_info *ehi = &dev->link->eh_info;
4819 ehi->probe_mask |= 1 << dev->devno;
4820 ehi->action |= ATA_EH_RESET;
4826 ata_port_schedule_eh(ap);
4827 spin_unlock_irqrestore(ap->lock, flags);
4828 ata_port_wait_eh(ap);
4830 spin_unlock_irqrestore(ap->lock, flags);
4836 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4837 * @work: Pointer to ATA port to perform scsi_rescan_device()
4839 * After ATA pass thru (SAT) commands are executed successfully,
4840 * libata need to propagate the changes to SCSI layer.
4843 * Kernel thread context (may sleep).
4845 void ata_scsi_dev_rescan(struct work_struct *work)
4847 struct ata_port *ap =
4848 container_of(work, struct ata_port, scsi_rescan_task);
4849 struct ata_link *link;
4850 struct ata_device *dev;
4851 unsigned long flags;
4853 mutex_lock(&ap->scsi_scan_mutex);
4854 spin_lock_irqsave(ap->lock, flags);
4856 ata_for_each_link(link, ap, EDGE) {
4857 ata_for_each_dev(dev, link, ENABLED) {
4858 struct scsi_device *sdev = dev->sdev;
4862 if (scsi_device_get(sdev))
4865 spin_unlock_irqrestore(ap->lock, flags);
4866 scsi_rescan_device(&(sdev->sdev_gendev));
4867 scsi_device_put(sdev);
4868 spin_lock_irqsave(ap->lock, flags);
4872 spin_unlock_irqrestore(ap->lock, flags);
4873 mutex_unlock(&ap->scsi_scan_mutex);
4877 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4878 * @host: ATA host container for all SAS ports
4879 * @port_info: Information from low-level host driver
4880 * @shost: SCSI host that the scsi device is attached to
4883 * PCI/etc. bus probe sem.
4886 * ata_port pointer on success / NULL on failure.
4889 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
4890 struct ata_port_info *port_info,
4891 struct Scsi_Host *shost)
4893 struct ata_port *ap;
4895 ap = ata_port_alloc(host);
4900 ap->lock = &host->lock;
4901 ap->pio_mask = port_info->pio_mask;
4902 ap->mwdma_mask = port_info->mwdma_mask;
4903 ap->udma_mask = port_info->udma_mask;
4904 ap->flags |= port_info->flags;
4905 ap->ops = port_info->port_ops;
4906 ap->cbl = ATA_CBL_SATA;
4910 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
4913 * ata_sas_port_start - Set port up for dma.
4914 * @ap: Port to initialize
4916 * Called just after data structures for each port are
4919 * May be used as the port_start() entry in ata_port_operations.
4922 * Inherited from caller.
4924 int ata_sas_port_start(struct ata_port *ap)
4927 * the port is marked as frozen at allocation time, but if we don't
4928 * have new eh, we won't thaw it
4930 if (!ap->ops->error_handler)
4931 ap->pflags &= ~ATA_PFLAG_FROZEN;
4934 EXPORT_SYMBOL_GPL(ata_sas_port_start);
4937 * ata_port_stop - Undo ata_sas_port_start()
4938 * @ap: Port to shut down
4940 * May be used as the port_stop() entry in ata_port_operations.
4943 * Inherited from caller.
4946 void ata_sas_port_stop(struct ata_port *ap)
4949 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
4952 * ata_sas_async_probe - simply schedule probing and return
4953 * @ap: Port to probe
4955 * For batch scheduling of probe for sas attached ata devices, assumes
4956 * the port has already been through ata_sas_port_init()
4958 void ata_sas_async_probe(struct ata_port *ap)
4960 __ata_port_probe(ap);
4962 EXPORT_SYMBOL_GPL(ata_sas_async_probe);
4964 int ata_sas_sync_probe(struct ata_port *ap)
4966 return ata_port_probe(ap);
4968 EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
4972 * ata_sas_port_init - Initialize a SATA device
4973 * @ap: SATA port to initialize
4976 * PCI/etc. bus probe sem.
4979 * Zero on success, non-zero on error.
4982 int ata_sas_port_init(struct ata_port *ap)
4984 int rc = ap->ops->port_start(ap);
4988 ap->print_id = atomic_inc_return(&ata_print_id);
4991 EXPORT_SYMBOL_GPL(ata_sas_port_init);
4994 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
4995 * @ap: SATA port to destroy
4999 void ata_sas_port_destroy(struct ata_port *ap)
5001 if (ap->ops->port_stop)
5002 ap->ops->port_stop(ap);
5005 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
5008 * ata_sas_slave_configure - Default slave_config routine for libata devices
5009 * @sdev: SCSI device to configure
5010 * @ap: ATA port to which SCSI device is attached
5016 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
5018 ata_scsi_sdev_config(sdev);
5019 ata_scsi_dev_config(sdev, ap->link.device);
5022 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
5025 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
5026 * @cmd: SCSI command to be sent
5027 * @ap: ATA port to which the command is being sent
5030 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
5034 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
5038 ata_scsi_dump_cdb(ap, cmd);
5040 if (likely(ata_dev_enabled(ap->link.device)))
5041 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
5043 cmd->result = (DID_BAD_TARGET << 16);
5044 cmd->scsi_done(cmd);
5048 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
5050 int ata_sas_allocate_tag(struct ata_port *ap)
5052 unsigned int max_queue = ap->host->n_tags;
5053 unsigned int i, tag;
5055 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) {
5056 tag = tag < max_queue ? tag : 0;
5058 /* the last tag is reserved for internal command. */
5059 if (tag == ATA_TAG_INTERNAL)
5062 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) {
5063 ap->sas_last_tag = tag;
5070 void ata_sas_free_tag(unsigned int tag, struct ata_port *ap)
5072 clear_bit(tag, &ap->sas_tag_allocated);