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);
487 static void ata_scsi_invalid_field(struct ata_device *dev,
488 struct scsi_cmnd *cmd, u16 field)
490 ata_scsi_set_invalid_field(dev, cmd, field, 0xff);
495 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
496 * @sdev: SCSI device for which BIOS geometry is to be determined
497 * @bdev: block device associated with @sdev
498 * @capacity: capacity of SCSI device
499 * @geom: location to which geometry will be output
501 * Generic bios head/sector/cylinder calculator
502 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
503 * mapping. Some situations may arise where the disk is not
504 * bootable if this is not used.
507 * Defined by the SCSI layer. We don't really care.
512 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
513 sector_t capacity, int geom[])
517 sector_div(capacity, 255*63);
524 * ata_scsi_unlock_native_capacity - unlock native capacity
525 * @sdev: SCSI device to adjust device capacity for
527 * This function is called if a partition on @sdev extends beyond
528 * the end of the device. It requests EH to unlock HPA.
531 * Defined by the SCSI layer. Might sleep.
533 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
535 struct ata_port *ap = ata_shost_to_port(sdev->host);
536 struct ata_device *dev;
539 spin_lock_irqsave(ap->lock, flags);
541 dev = ata_scsi_find_dev(ap, sdev);
542 if (dev && dev->n_sectors < dev->n_native_sectors) {
543 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
544 dev->link->eh_info.action |= ATA_EH_RESET;
545 ata_port_schedule_eh(ap);
548 spin_unlock_irqrestore(ap->lock, flags);
549 ata_port_wait_eh(ap);
553 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
555 * @sdev: SCSI device to get identify data for
556 * @arg: User buffer area for identify data
559 * Defined by the SCSI layer. We don't really care.
562 * Zero on success, negative errno on error.
564 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
567 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
568 u16 __user *dst = arg;
574 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
577 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
578 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
581 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
582 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
585 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
586 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
593 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
594 * @scsidev: Device to which we are issuing command
595 * @arg: User provided data for issuing command
598 * Defined by the SCSI layer. We don't really care.
601 * Zero on success, negative errno on error.
603 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
606 u8 scsi_cmd[MAX_COMMAND_SIZE];
607 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
609 enum dma_data_direction data_dir;
615 if (copy_from_user(args, arg, sizeof(args)))
618 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
622 memset(scsi_cmd, 0, sizeof(scsi_cmd));
625 argsize = ATA_SECT_SIZE * args[3];
626 argbuf = kmalloc(argsize, GFP_KERNEL);
627 if (argbuf == NULL) {
632 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
633 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
634 block count in sector count field */
635 data_dir = DMA_FROM_DEVICE;
637 scsi_cmd[1] = (3 << 1); /* Non-data */
638 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
642 scsi_cmd[0] = ATA_16;
644 scsi_cmd[4] = args[2];
645 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
646 scsi_cmd[6] = args[3];
647 scsi_cmd[8] = args[1];
651 scsi_cmd[6] = args[1];
653 scsi_cmd[14] = args[0];
655 /* Good values for timeout and retries? Values below
656 from scsi_ioctl_send_command() for default case... */
657 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
658 sensebuf, (10*HZ), 5, 0, NULL);
660 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
661 u8 *desc = sensebuf + 8;
662 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
664 /* If we set cc then ATA pass-through will cause a
665 * check condition even if no error. Filter that. */
666 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
667 struct scsi_sense_hdr sshdr;
668 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
670 if (sshdr.sense_key == RECOVERED_ERROR &&
671 sshdr.asc == 0 && sshdr.ascq == 0x1d)
672 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
675 /* Send userspace a few ATA registers (same as drivers/ide) */
676 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
677 desc[0] == 0x09) { /* code is "ATA Descriptor" */
678 args[0] = desc[13]; /* status */
679 args[1] = desc[3]; /* error */
680 args[2] = desc[5]; /* sector count (0:7) */
681 if (copy_to_user(arg, args, sizeof(args)))
693 && copy_to_user(arg + sizeof(args), argbuf, argsize))
702 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
703 * @scsidev: Device to which we are issuing command
704 * @arg: User provided data for issuing command
707 * Defined by the SCSI layer. We don't really care.
710 * Zero on success, negative errno on error.
712 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
715 u8 scsi_cmd[MAX_COMMAND_SIZE];
716 u8 args[7], *sensebuf = NULL;
722 if (copy_from_user(args, arg, sizeof(args)))
725 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
729 memset(scsi_cmd, 0, sizeof(scsi_cmd));
730 scsi_cmd[0] = ATA_16;
731 scsi_cmd[1] = (3 << 1); /* Non-data */
732 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
733 scsi_cmd[4] = args[1];
734 scsi_cmd[6] = args[2];
735 scsi_cmd[8] = args[3];
736 scsi_cmd[10] = args[4];
737 scsi_cmd[12] = args[5];
738 scsi_cmd[13] = args[6] & 0x4f;
739 scsi_cmd[14] = args[0];
741 /* Good values for timeout and retries? Values below
742 from scsi_ioctl_send_command() for default case... */
743 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
744 sensebuf, (10*HZ), 5, 0, NULL);
746 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
747 u8 *desc = sensebuf + 8;
748 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
750 /* If we set cc then ATA pass-through will cause a
751 * check condition even if no error. Filter that. */
752 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
753 struct scsi_sense_hdr sshdr;
754 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
756 if (sshdr.sense_key == RECOVERED_ERROR &&
757 sshdr.asc == 0 && sshdr.ascq == 0x1d)
758 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
761 /* Send userspace ATA registers */
762 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
763 desc[0] == 0x09) {/* code is "ATA Descriptor" */
764 args[0] = desc[13]; /* status */
765 args[1] = desc[3]; /* error */
766 args[2] = desc[5]; /* sector count (0:7) */
767 args[3] = desc[7]; /* lbal */
768 args[4] = desc[9]; /* lbam */
769 args[5] = desc[11]; /* lbah */
770 args[6] = desc[12]; /* select */
771 if (copy_to_user(arg, args, sizeof(args)))
786 static int ata_ioc32(struct ata_port *ap)
788 if (ap->flags & ATA_FLAG_PIO_DMA)
790 if (ap->pflags & ATA_PFLAG_PIO32)
795 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
796 int cmd, void __user *arg)
804 spin_lock_irqsave(ap->lock, flags);
806 spin_unlock_irqrestore(ap->lock, flags);
807 return put_user(val, (unsigned long __user *)arg);
810 val = (unsigned long) arg;
812 spin_lock_irqsave(ap->lock, flags);
813 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
815 ap->pflags |= ATA_PFLAG_PIO32;
817 ap->pflags &= ~ATA_PFLAG_PIO32;
819 if (val != ata_ioc32(ap))
822 spin_unlock_irqrestore(ap->lock, flags);
825 case HDIO_GET_IDENTITY:
826 return ata_get_identity(ap, scsidev, arg);
829 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
831 return ata_cmd_ioctl(scsidev, arg);
833 case HDIO_DRIVE_TASK:
834 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
836 return ata_task_ioctl(scsidev, arg);
845 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
847 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
849 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
852 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
855 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
856 * @dev: ATA device to which the new command is attached
857 * @cmd: SCSI command that originated this ATA command
859 * Obtain a reference to an unused ata_queued_cmd structure,
860 * which is the basic libata structure representing a single
861 * ATA command sent to the hardware.
863 * If a command was available, fill in the SCSI-specific
864 * portions of the structure with information on the
868 * spin_lock_irqsave(host lock)
871 * Command allocated, or %NULL if none available.
873 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
874 struct scsi_cmnd *cmd)
876 struct ata_queued_cmd *qc;
878 qc = ata_qc_new_init(dev, cmd->request->tag);
881 qc->scsidone = cmd->scsi_done;
883 qc->sg = scsi_sglist(cmd);
884 qc->n_elem = scsi_sg_count(cmd);
886 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
893 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
895 struct scsi_cmnd *scmd = qc->scsicmd;
897 qc->extrabytes = scmd->request->extra_len;
898 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
902 * ata_dump_status - user friendly display of error info
903 * @id: id of the port in question
904 * @tf: ptr to filled out taskfile
906 * Decode and dump the ATA error/status registers for the user so
907 * that they have some idea what really happened at the non
908 * make-believe layer.
911 * inherited from caller
913 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
915 u8 stat = tf->command, err = tf->feature;
917 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
918 if (stat & ATA_BUSY) {
919 printk("Busy }\n"); /* Data is not valid in this case */
921 if (stat & ATA_DRDY) printk("DriveReady ");
922 if (stat & ATA_DF) printk("DeviceFault ");
923 if (stat & ATA_DSC) printk("SeekComplete ");
924 if (stat & ATA_DRQ) printk("DataRequest ");
925 if (stat & ATA_CORR) printk("CorrectedError ");
926 if (stat & ATA_SENSE) printk("Sense ");
927 if (stat & ATA_ERR) printk("Error ");
931 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
932 if (err & ATA_ABORTED) printk("DriveStatusError ");
933 if (err & ATA_ICRC) {
934 if (err & ATA_ABORTED)
936 else printk("Sector ");
938 if (err & ATA_UNC) printk("UncorrectableError ");
939 if (err & ATA_IDNF) printk("SectorIdNotFound ");
940 if (err & ATA_TRK0NF) printk("TrackZeroNotFound ");
941 if (err & ATA_AMNF) printk("AddrMarkNotFound ");
948 * ata_to_sense_error - convert ATA error to SCSI error
949 * @id: ATA device number
950 * @drv_stat: value contained in ATA status register
951 * @drv_err: value contained in ATA error register
952 * @sk: the sense key we'll fill out
953 * @asc: the additional sense code we'll fill out
954 * @ascq: the additional sense code qualifier we'll fill out
955 * @verbose: be verbose
957 * Converts an ATA error into a SCSI error. Fill out pointers to
958 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
959 * format sense blocks.
962 * spin_lock_irqsave(host lock)
964 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
965 u8 *asc, u8 *ascq, int verbose)
969 /* Based on the 3ware driver translation table */
970 static const unsigned char sense_table[][4] = {
972 {0xd1, ABORTED_COMMAND, 0x00, 0x00},
973 // Device busy Aborted command
975 {0xd0, ABORTED_COMMAND, 0x00, 0x00},
976 // Device busy Aborted command
978 {0x61, HARDWARE_ERROR, 0x00, 0x00},
979 // Device fault Hardware error
980 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
981 {0x84, ABORTED_COMMAND, 0x47, 0x00},
982 // Data CRC error SCSI parity error
983 /* MC|ID|ABRT|TRK0|MARK */
984 {0x37, NOT_READY, 0x04, 0x00},
985 // Unit offline Not ready
987 {0x09, NOT_READY, 0x04, 0x00},
988 // Unrecovered disk error Not ready
989 /* Bad address mark */
990 {0x01, MEDIUM_ERROR, 0x13, 0x00},
991 // Address mark not found for data field
992 /* TRK0 - Track 0 not found */
993 {0x02, HARDWARE_ERROR, 0x00, 0x00},
995 /* Abort: 0x04 is not translated here, see below */
996 /* Media change request */
997 {0x08, NOT_READY, 0x04, 0x00},
998 // FIXME: faking offline
999 /* SRV/IDNF - ID not found */
1000 {0x10, ILLEGAL_REQUEST, 0x21, 0x00},
1001 // Logical address out of range
1002 /* MC - Media Changed */
1003 {0x20, UNIT_ATTENTION, 0x28, 0x00},
1004 // Not ready to ready change, medium may have changed
1005 /* ECC - Uncorrectable ECC error */
1006 {0x40, MEDIUM_ERROR, 0x11, 0x04},
1007 // Unrecovered read error
1008 /* BBD - block marked bad */
1009 {0x80, MEDIUM_ERROR, 0x11, 0x04},
1010 // Block marked bad Medium error, unrecovered read error
1011 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1013 static const unsigned char stat_table[][4] = {
1014 /* Must be first because BUSY means no other bits valid */
1015 {0x80, ABORTED_COMMAND, 0x47, 0x00},
1016 // Busy, fake parity for now
1017 {0x40, ILLEGAL_REQUEST, 0x21, 0x04},
1018 // Device ready, unaligned write command
1019 {0x20, HARDWARE_ERROR, 0x44, 0x00},
1020 // Device fault, internal target failure
1021 {0x08, ABORTED_COMMAND, 0x47, 0x00},
1022 // Timed out in xfer, fake parity for now
1023 {0x04, RECOVERED_ERROR, 0x11, 0x00},
1024 // Recovered ECC error Medium error, recovered
1025 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
1029 * Is this an error we can process/parse
1031 if (drv_stat & ATA_BUSY) {
1032 drv_err = 0; /* Ignore the err bits, they're invalid */
1036 /* Look for drv_err */
1037 for (i = 0; sense_table[i][0] != 0xFF; i++) {
1038 /* Look for best matches first */
1039 if ((sense_table[i][0] & drv_err) ==
1040 sense_table[i][0]) {
1041 *sk = sense_table[i][1];
1042 *asc = sense_table[i][2];
1043 *ascq = sense_table[i][3];
1044 goto translate_done;
1050 * Fall back to interpreting status bits. Note that if the drv_err
1051 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
1052 * is not descriptive enough.
1054 for (i = 0; stat_table[i][0] != 0xFF; i++) {
1055 if (stat_table[i][0] & drv_stat) {
1056 *sk = stat_table[i][1];
1057 *asc = stat_table[i][2];
1058 *ascq = stat_table[i][3];
1059 goto translate_done;
1064 * We need a sensible error return here, which is tricky, and one
1065 * that won't cause people to do things like return a disk wrongly.
1067 *sk = ABORTED_COMMAND;
1073 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
1074 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
1075 id, drv_stat, drv_err, *sk, *asc, *ascq);
1080 * ata_gen_passthru_sense - Generate check condition sense block.
1081 * @qc: Command that completed.
1083 * This function is specific to the ATA descriptor format sense
1084 * block specified for the ATA pass through commands. Regardless
1085 * of whether the command errored or not, return a sense
1086 * block. Copy all controller registers into the sense
1087 * block. If there was no error, we get the request from an ATA
1088 * passthrough command, so we use the following sense data:
1089 * sk = RECOVERED ERROR
1090 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1096 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
1098 struct scsi_cmnd *cmd = qc->scsicmd;
1099 struct ata_taskfile *tf = &qc->result_tf;
1100 unsigned char *sb = cmd->sense_buffer;
1101 unsigned char *desc = sb + 8;
1102 int verbose = qc->ap->ops->error_handler == NULL;
1103 u8 sense_key, asc, ascq;
1105 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1107 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1110 * Use ata_to_sense_error() to map status register bits
1111 * onto sense key, asc & ascq.
1114 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1115 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1116 &sense_key, &asc, &ascq, verbose);
1117 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq);
1120 * ATA PASS-THROUGH INFORMATION AVAILABLE
1121 * Always in descriptor format sense.
1123 scsi_build_sense_buffer(1, cmd->sense_buffer,
1124 RECOVERED_ERROR, 0, 0x1D);
1127 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) {
1130 /* descriptor format */
1132 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9);
1134 if (SCSI_SENSE_BUFFERSIZE < len + 14)
1137 desc = sb + 8 + len;
1142 * Copy registers into sense buffer.
1145 desc[3] = tf->feature; /* == error reg */
1146 desc[5] = tf->nsect;
1149 desc[11] = tf->lbah;
1150 desc[12] = tf->device;
1151 desc[13] = tf->command; /* == status reg */
1154 * Fill in Extend bit, and the high order bytes
1157 if (tf->flags & ATA_TFLAG_LBA48) {
1159 desc[4] = tf->hob_nsect;
1160 desc[6] = tf->hob_lbal;
1161 desc[8] = tf->hob_lbam;
1162 desc[10] = tf->hob_lbah;
1165 /* Fixed sense format */
1166 desc[0] = tf->feature;
1167 desc[1] = tf->command; /* status */
1168 desc[2] = tf->device;
1169 desc[3] = tf->nsect;
1171 if (tf->flags & ATA_TFLAG_LBA48) {
1175 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah)
1179 desc[10] = tf->lbam;
1180 desc[11] = tf->lbah;
1185 * ata_gen_ata_sense - generate a SCSI fixed sense block
1186 * @qc: Command that we are erroring out
1188 * Generate sense block for a failed ATA command @qc. Descriptor
1189 * format is used to accommodate LBA48 block address.
1194 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1196 struct ata_device *dev = qc->dev;
1197 struct scsi_cmnd *cmd = qc->scsicmd;
1198 struct ata_taskfile *tf = &qc->result_tf;
1199 unsigned char *sb = cmd->sense_buffer;
1200 int verbose = qc->ap->ops->error_handler == NULL;
1202 u8 sense_key, asc, ascq;
1204 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1206 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1208 if (ata_dev_disabled(dev)) {
1209 /* Device disabled after error recovery */
1210 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
1211 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21);
1214 /* Use ata_to_sense_error() to map status register bits
1215 * onto sense key, asc & ascq.
1218 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1219 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1220 &sense_key, &asc, &ascq, verbose);
1221 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq);
1223 /* Could not decode error */
1224 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n",
1225 tf->command, qc->err_mask);
1226 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0);
1230 block = ata_tf_read_block(&qc->result_tf, dev);
1231 if (block == U64_MAX)
1234 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block);
1237 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1239 sdev->use_10_for_rw = 1;
1240 sdev->use_10_for_ms = 1;
1241 sdev->no_write_same = 1;
1243 /* Schedule policy is determined by ->qc_defer() callback and
1244 * it needs to see every deferred qc. Set dev_blocked to 1 to
1245 * prevent SCSI midlayer from automatically deferring
1248 sdev->max_device_blocked = 1;
1252 * atapi_drain_needed - Check whether data transfer may overflow
1253 * @rq: request to be checked
1255 * ATAPI commands which transfer variable length data to host
1256 * might overflow due to application error or hardware bug. This
1257 * function checks whether overflow should be drained and ignored
1264 * 1 if ; otherwise, 0.
1266 static int atapi_drain_needed(struct request *rq)
1268 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
1271 if (!blk_rq_bytes(rq) || op_is_write(req_op(rq)))
1274 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1277 static int ata_scsi_dev_config(struct scsi_device *sdev,
1278 struct ata_device *dev)
1280 struct request_queue *q = sdev->request_queue;
1282 if (!ata_id_has_unload(dev->id))
1283 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1285 /* configure max sectors */
1286 blk_queue_max_hw_sectors(q, dev->max_sectors);
1288 if (dev->class == ATA_DEV_ATAPI) {
1291 sdev->sector_size = ATA_SECT_SIZE;
1293 /* set DMA padding */
1294 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1296 /* configure draining */
1297 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1299 ata_dev_err(dev, "drain buffer allocation failed\n");
1303 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1305 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1306 sdev->manage_start_stop = 1;
1310 * ata_pio_sectors() expects buffer for each sector to not cross
1311 * page boundary. Enforce it by requiring buffers to be sector
1312 * aligned, which works iff sector_size is not larger than
1313 * PAGE_SIZE. ATAPI devices also need the alignment as
1314 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1316 if (sdev->sector_size > PAGE_SIZE)
1318 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1321 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1323 if (dev->flags & ATA_DFLAG_AN)
1324 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1326 if (dev->flags & ATA_DFLAG_NCQ) {
1329 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1330 depth = min(ATA_MAX_QUEUE - 1, depth);
1331 scsi_change_queue_depth(sdev, depth);
1334 blk_queue_flush_queueable(q, false);
1341 * ata_scsi_slave_config - Set SCSI device attributes
1342 * @sdev: SCSI device to examine
1344 * This is called before we actually start reading
1345 * and writing to the device, to configure certain
1346 * SCSI mid-layer behaviors.
1349 * Defined by SCSI layer. We don't really care.
1352 int ata_scsi_slave_config(struct scsi_device *sdev)
1354 struct ata_port *ap = ata_shost_to_port(sdev->host);
1355 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1358 ata_scsi_sdev_config(sdev);
1361 rc = ata_scsi_dev_config(sdev, dev);
1367 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1368 * @sdev: SCSI device to be destroyed
1370 * @sdev is about to be destroyed for hot/warm unplugging. If
1371 * this unplugging was initiated by libata as indicated by NULL
1372 * dev->sdev, this function doesn't have to do anything.
1373 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1374 * Clear dev->sdev, schedule the device for ATA detach and invoke
1378 * Defined by SCSI layer. We don't really care.
1380 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1382 struct ata_port *ap = ata_shost_to_port(sdev->host);
1383 struct request_queue *q = sdev->request_queue;
1384 unsigned long flags;
1385 struct ata_device *dev;
1387 if (!ap->ops->error_handler)
1390 spin_lock_irqsave(ap->lock, flags);
1391 dev = __ata_scsi_find_dev(ap, sdev);
1392 if (dev && dev->sdev) {
1393 /* SCSI device already in CANCEL state, no need to offline it */
1395 dev->flags |= ATA_DFLAG_DETACH;
1396 ata_port_schedule_eh(ap);
1398 spin_unlock_irqrestore(ap->lock, flags);
1400 kfree(q->dma_drain_buffer);
1401 q->dma_drain_buffer = NULL;
1402 q->dma_drain_size = 0;
1406 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1407 * @ap: ATA port to which the device change the queue depth
1408 * @sdev: SCSI device to configure queue depth for
1409 * @queue_depth: new queue depth
1411 * libsas and libata have different approaches for associating a sdev to
1415 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1418 struct ata_device *dev;
1419 unsigned long flags;
1421 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1422 return sdev->queue_depth;
1424 dev = ata_scsi_find_dev(ap, sdev);
1425 if (!dev || !ata_dev_enabled(dev))
1426 return sdev->queue_depth;
1429 spin_lock_irqsave(ap->lock, flags);
1430 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1431 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1432 dev->flags |= ATA_DFLAG_NCQ_OFF;
1435 spin_unlock_irqrestore(ap->lock, flags);
1437 /* limit and apply queue depth */
1438 queue_depth = min(queue_depth, sdev->host->can_queue);
1439 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1440 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1442 if (sdev->queue_depth == queue_depth)
1445 return scsi_change_queue_depth(sdev, queue_depth);
1449 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1450 * @sdev: SCSI device to configure queue depth for
1451 * @queue_depth: new queue depth
1453 * This is libata standard hostt->change_queue_depth callback.
1454 * SCSI will call into this callback when user tries to set queue
1458 * SCSI layer (we don't care)
1461 * Newly configured queue depth.
1463 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1465 struct ata_port *ap = ata_shost_to_port(sdev->host);
1467 return __ata_change_queue_depth(ap, sdev, queue_depth);
1471 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1472 * @qc: Storage for translated ATA taskfile
1474 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1475 * (to start). Perhaps these commands should be preceded by
1476 * CHECK POWER MODE to see what power mode the device is already in.
1477 * [See SAT revision 5 at www.t10.org]
1480 * spin_lock_irqsave(host lock)
1483 * Zero on success, non-zero on error.
1485 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1487 struct scsi_cmnd *scmd = qc->scsicmd;
1488 struct ata_taskfile *tf = &qc->tf;
1489 const u8 *cdb = scmd->cmnd;
1493 if (scmd->cmd_len < 5) {
1498 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1499 tf->protocol = ATA_PROT_NODATA;
1501 ; /* ignore IMMED bit, violates sat-r05 */
1506 goto invalid_fld; /* LOEJ bit set not supported */
1508 if (((cdb[4] >> 4) & 0xf) != 0) {
1511 goto invalid_fld; /* power conditions not supported */
1515 tf->nsect = 1; /* 1 sector, lba=0 */
1517 if (qc->dev->flags & ATA_DFLAG_LBA) {
1518 tf->flags |= ATA_TFLAG_LBA;
1523 tf->device |= ATA_LBA;
1526 tf->lbal = 0x1; /* sect */
1527 tf->lbam = 0x0; /* cyl low */
1528 tf->lbah = 0x0; /* cyl high */
1531 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1533 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1534 * or S5) causing some drives to spin up and down again.
1536 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1537 system_state == SYSTEM_POWER_OFF)
1540 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1541 system_entering_hibernation())
1544 /* Issue ATA STANDBY IMMEDIATE command */
1545 tf->command = ATA_CMD_STANDBYNOW1;
1549 * Standby and Idle condition timers could be implemented but that
1550 * would require libata to implement the Power condition mode page
1551 * and allow the user to change it. Changing mode pages requires
1552 * MODE SELECT to be implemented.
1558 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
1561 scmd->result = SAM_STAT_GOOD;
1567 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1568 * @qc: Storage for translated ATA taskfile
1570 * Sets up an ATA taskfile to issue FLUSH CACHE or
1574 * spin_lock_irqsave(host lock)
1577 * Zero on success, non-zero on error.
1579 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1581 struct ata_taskfile *tf = &qc->tf;
1583 tf->flags |= ATA_TFLAG_DEVICE;
1584 tf->protocol = ATA_PROT_NODATA;
1586 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1587 tf->command = ATA_CMD_FLUSH_EXT;
1589 tf->command = ATA_CMD_FLUSH;
1591 /* flush is critical for IO integrity, consider it an IO command */
1592 qc->flags |= ATA_QCFLAG_IO;
1598 * scsi_6_lba_len - Get LBA and transfer length
1599 * @cdb: SCSI command to translate
1601 * Calculate LBA and transfer length for 6-byte commands.
1605 * @plen: the transfer length
1607 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1612 VPRINTK("six-byte command\n");
1614 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1615 lba |= ((u64)cdb[2]) << 8;
1616 lba |= ((u64)cdb[3]);
1625 * scsi_10_lba_len - Get LBA and transfer length
1626 * @cdb: SCSI command to translate
1628 * Calculate LBA and transfer length for 10-byte commands.
1632 * @plen: the transfer length
1634 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1639 VPRINTK("ten-byte command\n");
1641 lba |= ((u64)cdb[2]) << 24;
1642 lba |= ((u64)cdb[3]) << 16;
1643 lba |= ((u64)cdb[4]) << 8;
1644 lba |= ((u64)cdb[5]);
1646 len |= ((u32)cdb[7]) << 8;
1647 len |= ((u32)cdb[8]);
1654 * scsi_16_lba_len - Get LBA and transfer length
1655 * @cdb: SCSI command to translate
1657 * Calculate LBA and transfer length for 16-byte commands.
1661 * @plen: the transfer length
1663 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1668 VPRINTK("sixteen-byte command\n");
1670 lba |= ((u64)cdb[2]) << 56;
1671 lba |= ((u64)cdb[3]) << 48;
1672 lba |= ((u64)cdb[4]) << 40;
1673 lba |= ((u64)cdb[5]) << 32;
1674 lba |= ((u64)cdb[6]) << 24;
1675 lba |= ((u64)cdb[7]) << 16;
1676 lba |= ((u64)cdb[8]) << 8;
1677 lba |= ((u64)cdb[9]);
1679 len |= ((u32)cdb[10]) << 24;
1680 len |= ((u32)cdb[11]) << 16;
1681 len |= ((u32)cdb[12]) << 8;
1682 len |= ((u32)cdb[13]);
1689 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1690 * @qc: Storage for translated ATA taskfile
1692 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1695 * spin_lock_irqsave(host lock)
1698 * Zero on success, non-zero on error.
1700 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1702 struct scsi_cmnd *scmd = qc->scsicmd;
1703 struct ata_taskfile *tf = &qc->tf;
1704 struct ata_device *dev = qc->dev;
1705 u64 dev_sectors = qc->dev->n_sectors;
1706 const u8 *cdb = scmd->cmnd;
1711 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1712 tf->protocol = ATA_PROT_NODATA;
1714 if (cdb[0] == VERIFY) {
1715 if (scmd->cmd_len < 10) {
1719 scsi_10_lba_len(cdb, &block, &n_block);
1720 } else if (cdb[0] == VERIFY_16) {
1721 if (scmd->cmd_len < 16) {
1725 scsi_16_lba_len(cdb, &block, &n_block);
1733 if (block >= dev_sectors)
1735 if ((block + n_block) > dev_sectors)
1738 if (dev->flags & ATA_DFLAG_LBA) {
1739 tf->flags |= ATA_TFLAG_LBA;
1741 if (lba_28_ok(block, n_block)) {
1743 tf->command = ATA_CMD_VERIFY;
1744 tf->device |= (block >> 24) & 0xf;
1745 } else if (lba_48_ok(block, n_block)) {
1746 if (!(dev->flags & ATA_DFLAG_LBA48))
1750 tf->flags |= ATA_TFLAG_LBA48;
1751 tf->command = ATA_CMD_VERIFY_EXT;
1753 tf->hob_nsect = (n_block >> 8) & 0xff;
1755 tf->hob_lbah = (block >> 40) & 0xff;
1756 tf->hob_lbam = (block >> 32) & 0xff;
1757 tf->hob_lbal = (block >> 24) & 0xff;
1759 /* request too large even for LBA48 */
1762 tf->nsect = n_block & 0xff;
1764 tf->lbah = (block >> 16) & 0xff;
1765 tf->lbam = (block >> 8) & 0xff;
1766 tf->lbal = block & 0xff;
1768 tf->device |= ATA_LBA;
1771 u32 sect, head, cyl, track;
1773 if (!lba_28_ok(block, n_block))
1776 /* Convert LBA to CHS */
1777 track = (u32)block / dev->sectors;
1778 cyl = track / dev->heads;
1779 head = track % dev->heads;
1780 sect = (u32)block % dev->sectors + 1;
1782 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1783 (u32)block, track, cyl, head, sect);
1785 /* Check whether the converted CHS can fit.
1789 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1792 tf->command = ATA_CMD_VERIFY;
1793 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1796 tf->lbah = cyl >> 8;
1803 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1807 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1808 /* "Logical Block Address out of range" */
1812 scmd->result = SAM_STAT_GOOD;
1817 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1818 * @qc: Storage for translated ATA taskfile
1820 * Converts any of six SCSI read/write commands into the
1821 * ATA counterpart, including starting sector (LBA),
1822 * sector count, and taking into account the device's LBA48
1825 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1826 * %WRITE_16 are currently supported.
1829 * spin_lock_irqsave(host lock)
1832 * Zero on success, non-zero on error.
1834 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1836 struct scsi_cmnd *scmd = qc->scsicmd;
1837 const u8 *cdb = scmd->cmnd;
1838 struct request *rq = scmd->request;
1839 int class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
1840 unsigned int tf_flags = 0;
1846 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1847 tf_flags |= ATA_TFLAG_WRITE;
1849 /* Calculate the SCSI LBA, transfer length and FUA. */
1853 if (unlikely(scmd->cmd_len < 10)) {
1857 scsi_10_lba_len(cdb, &block, &n_block);
1858 if (cdb[1] & (1 << 3))
1859 tf_flags |= ATA_TFLAG_FUA;
1863 if (unlikely(scmd->cmd_len < 6)) {
1867 scsi_6_lba_len(cdb, &block, &n_block);
1869 /* for 6-byte r/w commands, transfer length 0
1870 * means 256 blocks of data, not 0 block.
1877 if (unlikely(scmd->cmd_len < 16)) {
1881 scsi_16_lba_len(cdb, &block, &n_block);
1882 if (cdb[1] & (1 << 3))
1883 tf_flags |= ATA_TFLAG_FUA;
1886 DPRINTK("no-byte command\n");
1891 /* Check and compose ATA command */
1893 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1894 * length 0 means transfer 0 block of data.
1895 * However, for ATA R/W commands, sector count 0 means
1896 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1898 * WARNING: one or two older ATA drives treat 0 as 0...
1902 qc->flags |= ATA_QCFLAG_IO;
1903 qc->nbytes = n_block * scmd->device->sector_size;
1905 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1908 if (likely(rc == 0))
1913 /* treat all other errors as -EINVAL, fall through */
1915 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1919 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1920 /* "Logical Block Address out of range" */
1924 scmd->result = SAM_STAT_GOOD;
1928 static void ata_qc_done(struct ata_queued_cmd *qc)
1930 struct scsi_cmnd *cmd = qc->scsicmd;
1931 void (*done)(struct scsi_cmnd *) = qc->scsidone;
1937 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1939 struct ata_port *ap = qc->ap;
1940 struct scsi_cmnd *cmd = qc->scsicmd;
1941 u8 *cdb = cmd->cmnd;
1942 int need_sense = (qc->err_mask != 0);
1944 /* For ATA pass thru (SAT) commands, generate a sense block if
1945 * user mandated it or if there's an error. Note that if we
1946 * generate because the user forced us to [CK_COND =1], a check
1947 * condition is generated and the ATA register values are returned
1948 * whether the command completed successfully or not. If there
1949 * was no error, we use the following sense data:
1950 * sk = RECOVERED ERROR
1951 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1953 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1954 ((cdb[2] & 0x20) || need_sense))
1955 ata_gen_passthru_sense(qc);
1956 else if (qc->flags & ATA_QCFLAG_SENSE_VALID)
1957 cmd->result = SAM_STAT_CHECK_CONDITION;
1958 else if (need_sense)
1959 ata_gen_ata_sense(qc);
1961 cmd->result = SAM_STAT_GOOD;
1963 if (need_sense && !ap->ops->error_handler)
1964 ata_dump_status(ap->print_id, &qc->result_tf);
1970 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1971 * @dev: ATA device to which the command is addressed
1972 * @cmd: SCSI command to execute
1973 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1975 * Our ->queuecommand() function has decided that the SCSI
1976 * command issued can be directly translated into an ATA
1977 * command, rather than handled internally.
1979 * This function sets up an ata_queued_cmd structure for the
1980 * SCSI command, and sends that ata_queued_cmd to the hardware.
1982 * The xlat_func argument (actor) returns 0 if ready to execute
1983 * ATA command, else 1 to finish translation. If 1 is returned
1984 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1985 * to be set reflecting an error condition or clean (early)
1989 * spin_lock_irqsave(host lock)
1992 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1993 * needs to be deferred.
1995 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1996 ata_xlat_func_t xlat_func)
1998 struct ata_port *ap = dev->link->ap;
1999 struct ata_queued_cmd *qc;
2004 qc = ata_scsi_qc_new(dev, cmd);
2008 /* data is present; dma-map it */
2009 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
2010 cmd->sc_data_direction == DMA_TO_DEVICE) {
2011 if (unlikely(scsi_bufflen(cmd) < 1)) {
2012 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
2016 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
2018 qc->dma_dir = cmd->sc_data_direction;
2021 qc->complete_fn = ata_scsi_qc_complete;
2026 if (ap->ops->qc_defer) {
2027 if ((rc = ap->ops->qc_defer(qc)))
2031 /* select device, send command to hardware */
2039 cmd->scsi_done(cmd);
2040 DPRINTK("EXIT - early finish (good or error)\n");
2045 cmd->result = (DID_ERROR << 16);
2046 cmd->scsi_done(cmd);
2048 DPRINTK("EXIT - internal\n");
2053 DPRINTK("EXIT - defer\n");
2054 if (rc == ATA_DEFER_LINK)
2055 return SCSI_MLQUEUE_DEVICE_BUSY;
2057 return SCSI_MLQUEUE_HOST_BUSY;
2060 struct ata_scsi_args {
2061 struct ata_device *dev;
2063 struct scsi_cmnd *cmd;
2067 * ata_scsi_rbuf_get - Map response buffer.
2068 * @cmd: SCSI command containing buffer to be mapped.
2069 * @flags: unsigned long variable to store irq enable status
2070 * @copy_in: copy in from user buffer
2072 * Prepare buffer for simulated SCSI commands.
2075 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
2078 * Pointer to response buffer.
2080 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
2081 unsigned long *flags)
2083 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
2085 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
2087 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2088 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2089 return ata_scsi_rbuf;
2093 * ata_scsi_rbuf_put - Unmap response buffer.
2094 * @cmd: SCSI command containing buffer to be unmapped.
2095 * @copy_out: copy out result
2096 * @flags: @flags passed to ata_scsi_rbuf_get()
2098 * Returns rbuf buffer. The result is copied to @cmd's buffer if
2099 * @copy_back is true.
2102 * Unlocks ata_scsi_rbuf_lock.
2104 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
2105 unsigned long *flags)
2108 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2109 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2110 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
2114 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
2115 * @args: device IDENTIFY data / SCSI command of interest.
2116 * @actor: Callback hook for desired SCSI command simulator
2118 * Takes care of the hard work of simulating a SCSI command...
2119 * Mapping the response buffer, calling the command's handler,
2120 * and handling the handler's return value. This return value
2121 * indicates whether the handler wishes the SCSI command to be
2122 * completed successfully (0), or not (in which case cmd->result
2123 * and sense buffer are assumed to be set).
2126 * spin_lock_irqsave(host lock)
2128 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
2129 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
2133 struct scsi_cmnd *cmd = args->cmd;
2134 unsigned long flags;
2136 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
2137 rc = actor(args, rbuf);
2138 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
2141 cmd->result = SAM_STAT_GOOD;
2142 cmd->scsi_done(cmd);
2146 * ata_scsiop_inq_std - Simulate INQUIRY command
2147 * @args: device IDENTIFY data / SCSI command of interest.
2148 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2150 * Returns standard device identification data associated
2151 * with non-VPD INQUIRY command output.
2154 * spin_lock_irqsave(host lock)
2156 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
2158 const u8 versions[] = {
2160 0x60, /* SAM-3 (no version claimed) */
2163 0x20, /* SBC-2 (no version claimed) */
2166 0x00 /* SPC-3 (no version claimed) */
2168 const u8 versions_zbc[] = {
2170 0xA0, /* SAM-5 (no version claimed) */
2173 0x00, /* SBC-4 (no version claimed) */
2176 0xC0, /* SPC-5 (no version claimed) */
2185 0x5, /* claim SPC-3 version compatibility */
2195 /* set scsi removable (RMB) bit per ata bit, or if the
2196 * AHCI port says it's external (Hotplug-capable, eSATA).
2198 if (ata_id_removable(args->id) ||
2199 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL))
2202 if (args->dev->class == ATA_DEV_ZAC) {
2204 hdr[2] = 0x7; /* claim SPC-5 version compatibility */
2207 memcpy(rbuf, hdr, sizeof(hdr));
2208 memcpy(&rbuf[8], "ATA ", 8);
2209 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
2211 /* From SAT, use last 2 words from fw rev unless they are spaces */
2212 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
2213 if (strncmp(&rbuf[32], " ", 4) == 0)
2214 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2216 if (rbuf[32] == 0 || rbuf[32] == ' ')
2217 memcpy(&rbuf[32], "n/a ", 4);
2219 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC)
2220 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc));
2222 memcpy(rbuf + 58, versions, sizeof(versions));
2228 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2229 * @args: device IDENTIFY data / SCSI command of interest.
2230 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2232 * Returns list of inquiry VPD pages available.
2235 * spin_lock_irqsave(host lock)
2237 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
2240 const u8 pages[] = {
2241 0x00, /* page 0x00, this page */
2242 0x80, /* page 0x80, unit serial no page */
2243 0x83, /* page 0x83, device ident page */
2244 0x89, /* page 0x89, ata info page */
2245 0xb0, /* page 0xb0, block limits page */
2246 0xb1, /* page 0xb1, block device characteristics page */
2247 0xb2, /* page 0xb2, thin provisioning page */
2248 0xb6, /* page 0xb6, zoned block device characteristics */
2251 num_pages = sizeof(pages);
2252 if (!(args->dev->flags & ATA_DFLAG_ZAC))
2254 rbuf[3] = num_pages; /* number of supported VPD pages */
2255 memcpy(rbuf + 4, pages, num_pages);
2260 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2261 * @args: device IDENTIFY data / SCSI command of interest.
2262 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2264 * Returns ATA device serial number.
2267 * spin_lock_irqsave(host lock)
2269 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2273 0x80, /* this page code */
2275 ATA_ID_SERNO_LEN, /* page len */
2278 memcpy(rbuf, hdr, sizeof(hdr));
2279 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2280 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2285 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2286 * @args: device IDENTIFY data / SCSI command of interest.
2287 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2289 * Yields two logical unit device identification designators:
2290 * - vendor specific ASCII containing the ATA serial number
2291 * - SAT defined "t10 vendor id based" containing ASCII vendor
2292 * name ("ATA "), model and serial numbers.
2295 * spin_lock_irqsave(host lock)
2297 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2299 const int sat_model_serial_desc_len = 68;
2302 rbuf[1] = 0x83; /* this page code */
2305 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2307 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2309 ata_id_string(args->id, (unsigned char *) rbuf + num,
2310 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2311 num += ATA_ID_SERNO_LEN;
2313 /* SAT defined lu model and serial numbers descriptor */
2314 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2317 rbuf[num + 3] = sat_model_serial_desc_len;
2319 memcpy(rbuf + num, "ATA ", 8);
2321 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2323 num += ATA_ID_PROD_LEN;
2324 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2326 num += ATA_ID_SERNO_LEN;
2328 if (ata_id_has_wwn(args->id)) {
2329 /* SAT defined lu world wide name */
2330 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2333 rbuf[num + 3] = ATA_ID_WWN_LEN;
2335 ata_id_string(args->id, (unsigned char *) rbuf + num,
2336 ATA_ID_WWN, ATA_ID_WWN_LEN);
2337 num += ATA_ID_WWN_LEN;
2339 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2344 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2345 * @args: device IDENTIFY data / SCSI command of interest.
2346 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2348 * Yields SAT-specified ATA VPD page.
2351 * spin_lock_irqsave(host lock)
2353 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2355 struct ata_taskfile tf;
2357 memset(&tf, 0, sizeof(tf));
2359 rbuf[1] = 0x89; /* our page code */
2360 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2361 rbuf[3] = (0x238 & 0xff);
2363 memcpy(&rbuf[8], "linux ", 8);
2364 memcpy(&rbuf[16], "libata ", 16);
2365 memcpy(&rbuf[32], DRV_VERSION, 4);
2367 /* we don't store the ATA device signature, so we fake it */
2369 tf.command = ATA_DRDY; /* really, this is Status reg */
2373 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2374 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2376 rbuf[56] = ATA_CMD_ID_ATA;
2378 memcpy(&rbuf[60], &args->id[0], 512);
2382 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2387 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2390 * Optimal transfer length granularity.
2392 * This is always one physical block, but for disks with a smaller
2393 * logical than physical sector size we need to figure out what the
2396 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2397 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2400 * Optimal unmap granularity.
2402 * The ATA spec doesn't even know about a granularity or alignment
2403 * for the TRIM command. We can leave away most of the unmap related
2404 * VPD page entries, but we have specifify a granularity to signal
2405 * that we support some form of unmap - in thise case via WRITE SAME
2406 * with the unmap bit set.
2408 if (ata_id_has_trim(args->id)) {
2409 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]);
2410 put_unaligned_be32(1, &rbuf[28]);
2416 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2418 int form_factor = ata_id_form_factor(args->id);
2419 int media_rotation_rate = ata_id_rotation_rate(args->id);
2420 u8 zoned = ata_id_zoned_cap(args->id);
2424 rbuf[4] = media_rotation_rate >> 8;
2425 rbuf[5] = media_rotation_rate;
2426 rbuf[7] = form_factor;
2428 rbuf[8] = (zoned << 4);
2433 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2435 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2438 rbuf[5] = 1 << 6; /* TPWS */
2443 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf)
2446 * zbc-r05 SCSI Zoned Block device characteristics VPD page
2452 * URSWRZ bit is only meaningful for host-managed ZAC drives
2454 if (args->dev->zac_zoned_cap & 1)
2456 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]);
2457 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]);
2458 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]);
2464 * ata_scsiop_noop - Command handler that simply returns success.
2465 * @args: device IDENTIFY data / SCSI command of interest.
2466 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2468 * No operation. Simply returns success to caller, to indicate
2469 * that the caller should successfully complete this SCSI command.
2472 * spin_lock_irqsave(host lock)
2474 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
2481 * modecpy - Prepare response for MODE SENSE
2482 * @dest: output buffer
2483 * @src: data being copied
2484 * @n: length of mode page
2485 * @changeable: whether changeable parameters are requested
2487 * Generate a generic MODE SENSE page for either current or changeable
2493 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2496 memcpy(dest, src, 2);
2497 memset(dest + 2, 0, n - 2);
2499 memcpy(dest, src, n);
2504 * ata_msense_caching - Simulate MODE SENSE caching info page
2505 * @id: device IDENTIFY data
2506 * @buf: output buffer
2507 * @changeable: whether changeable parameters are requested
2509 * Generate a caching info page, which conditionally indicates
2510 * write caching to the SCSI layer, depending on device
2516 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2518 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2520 buf[2] |= (1 << 2); /* ata_mselect_caching() */
2522 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */
2523 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */
2525 return sizeof(def_cache_mpage);
2529 * ata_msense_control - Simulate MODE SENSE control mode page
2530 * @dev: ATA device of interest
2531 * @buf: output buffer
2532 * @changeable: whether changeable parameters are requested
2534 * Generate a generic MODE SENSE control mode page.
2539 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf,
2542 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2544 buf[2] |= (1 << 2); /* ata_mselect_control() */
2546 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
2548 buf[2] |= (d_sense << 2); /* descriptor format sense data */
2550 return sizeof(def_control_mpage);
2554 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2555 * @buf: output buffer
2556 * @changeable: whether changeable parameters are requested
2558 * Generate a generic MODE SENSE r/w error recovery page.
2563 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2565 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2567 return sizeof(def_rw_recovery_mpage);
2571 * We can turn this into a real blacklist if it's needed, for now just
2572 * blacklist any Maxtor BANC1G10 revision firmware
2574 static int ata_dev_supports_fua(u16 *id)
2576 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2580 if (!ata_id_has_fua(id))
2583 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2584 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2586 if (strcmp(model, "Maxtor"))
2588 if (strcmp(fw, "BANC1G10"))
2591 return 0; /* blacklisted */
2595 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2596 * @args: device IDENTIFY data / SCSI command of interest.
2597 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2599 * Simulate MODE SENSE commands. Assume this is invoked for direct
2600 * access devices (e.g. disks) only. There should be no block
2601 * descriptor for other device types.
2604 * spin_lock_irqsave(host lock)
2606 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2608 struct ata_device *dev = args->dev;
2609 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2610 const u8 sat_blk_desc[] = {
2611 0, 0, 0, 0, /* number of blocks: sat unspecified */
2613 0, 0x2, 0x0 /* block length: 512 bytes */
2616 unsigned int ebd, page_control, six_byte;
2617 u8 dpofua, bp = 0xff;
2622 six_byte = (scsicmd[0] == MODE_SENSE);
2623 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2625 * LLBA bit in msense(10) ignored (compliant)
2628 page_control = scsicmd[2] >> 6;
2629 switch (page_control) {
2630 case 0: /* current */
2631 case 1: /* changeable */
2632 case 2: /* defaults */
2633 break; /* supported */
2635 goto saving_not_supp;
2643 p += 4 + (ebd ? 8 : 0);
2645 p += 8 + (ebd ? 8 : 0);
2647 pg = scsicmd[2] & 0x3f;
2650 * No mode subpages supported (yet) but asking for _all_
2651 * subpages may be valid
2653 if (spg && (spg != ALL_SUB_MPAGES)) {
2659 case RW_RECOVERY_MPAGE:
2660 p += ata_msense_rw_recovery(p, page_control == 1);
2664 p += ata_msense_caching(args->id, p, page_control == 1);
2668 p += ata_msense_control(args->dev, p, page_control == 1);
2672 p += ata_msense_rw_recovery(p, page_control == 1);
2673 p += ata_msense_caching(args->id, p, page_control == 1);
2674 p += ata_msense_control(args->dev, p, page_control == 1);
2677 default: /* invalid page code */
2683 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2684 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2688 rbuf[0] = p - rbuf - 1;
2691 rbuf[3] = sizeof(sat_blk_desc);
2692 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2695 unsigned int output_len = p - rbuf - 2;
2697 rbuf[0] = output_len >> 8;
2698 rbuf[1] = output_len;
2701 rbuf[7] = sizeof(sat_blk_desc);
2702 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2708 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp);
2712 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2713 /* "Saving parameters not supported" */
2718 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2719 * @args: device IDENTIFY data / SCSI command of interest.
2720 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2722 * Simulate READ CAPACITY commands.
2727 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2729 struct ata_device *dev = args->dev;
2730 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2731 u32 sector_size; /* physical sector size in bytes */
2735 sector_size = ata_id_logical_sector_size(dev->id);
2736 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2737 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2741 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2742 if (last_lba >= 0xffffffffULL)
2743 last_lba = 0xffffffff;
2745 /* sector count, 32-bit */
2746 rbuf[0] = last_lba >> (8 * 3);
2747 rbuf[1] = last_lba >> (8 * 2);
2748 rbuf[2] = last_lba >> (8 * 1);
2752 rbuf[4] = sector_size >> (8 * 3);
2753 rbuf[5] = sector_size >> (8 * 2);
2754 rbuf[6] = sector_size >> (8 * 1);
2755 rbuf[7] = sector_size;
2757 /* sector count, 64-bit */
2758 rbuf[0] = last_lba >> (8 * 7);
2759 rbuf[1] = last_lba >> (8 * 6);
2760 rbuf[2] = last_lba >> (8 * 5);
2761 rbuf[3] = last_lba >> (8 * 4);
2762 rbuf[4] = last_lba >> (8 * 3);
2763 rbuf[5] = last_lba >> (8 * 2);
2764 rbuf[6] = last_lba >> (8 * 1);
2768 rbuf[ 8] = sector_size >> (8 * 3);
2769 rbuf[ 9] = sector_size >> (8 * 2);
2770 rbuf[10] = sector_size >> (8 * 1);
2771 rbuf[11] = sector_size;
2774 rbuf[13] = log2_per_phys;
2775 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2776 rbuf[15] = lowest_aligned;
2778 if (ata_id_has_trim(args->id) &&
2779 !(dev->horkage & ATA_HORKAGE_NOTRIM)) {
2780 rbuf[14] |= 0x80; /* LBPME */
2782 if (ata_id_has_zero_after_trim(args->id) &&
2783 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) {
2784 ata_dev_info(dev, "Enabling discard_zeroes_data\n");
2785 rbuf[14] |= 0x40; /* LBPRZ */
2788 if (ata_id_zoned_cap(args->id) ||
2789 args->dev->class == ATA_DEV_ZAC)
2790 rbuf[12] = (1 << 4); /* RC_BASIS */
2796 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2797 * @args: device IDENTIFY data / SCSI command of interest.
2798 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2800 * Simulate REPORT LUNS command.
2803 * spin_lock_irqsave(host lock)
2805 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2808 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2813 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2815 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2816 /* FIXME: not quite right; we don't want the
2817 * translation of taskfile registers into
2818 * a sense descriptors, since that's only
2819 * correct for ATA, not ATAPI
2821 ata_gen_passthru_sense(qc);
2827 /* is it pointless to prefer PIO for "safety reasons"? */
2828 static inline int ata_pio_use_silly(struct ata_port *ap)
2830 return (ap->flags & ATA_FLAG_PIO_DMA);
2833 static void atapi_request_sense(struct ata_queued_cmd *qc)
2835 struct ata_port *ap = qc->ap;
2836 struct scsi_cmnd *cmd = qc->scsicmd;
2838 DPRINTK("ATAPI request sense\n");
2840 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2842 #ifdef CONFIG_ATA_SFF
2843 if (ap->ops->sff_tf_read)
2844 ap->ops->sff_tf_read(ap, &qc->tf);
2847 /* fill these in, for the case where they are -not- overwritten */
2848 cmd->sense_buffer[0] = 0x70;
2849 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2853 /* setup sg table and init transfer direction */
2854 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2855 ata_sg_init(qc, &qc->sgent, 1);
2856 qc->dma_dir = DMA_FROM_DEVICE;
2858 memset(&qc->cdb, 0, qc->dev->cdb_len);
2859 qc->cdb[0] = REQUEST_SENSE;
2860 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2862 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2863 qc->tf.command = ATA_CMD_PACKET;
2865 if (ata_pio_use_silly(ap)) {
2866 qc->tf.protocol = ATAPI_PROT_DMA;
2867 qc->tf.feature |= ATAPI_PKT_DMA;
2869 qc->tf.protocol = ATAPI_PROT_PIO;
2870 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2873 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2875 qc->complete_fn = atapi_sense_complete;
2883 * ATAPI devices typically report zero for their SCSI version, and sometimes
2884 * deviate from the spec WRT response data format. If SCSI version is
2885 * reported as zero like normal, then we make the following fixups:
2886 * 1) Fake MMC-5 version, to indicate to the Linux scsi midlayer this is a
2888 * 2) Ensure response data format / ATAPI information are always correct.
2890 static void atapi_fixup_inquiry(struct scsi_cmnd *cmd)
2894 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2899 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, 4);
2902 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2904 struct scsi_cmnd *cmd = qc->scsicmd;
2905 unsigned int err_mask = qc->err_mask;
2907 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2909 /* handle completion from new EH */
2910 if (unlikely(qc->ap->ops->error_handler &&
2911 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2913 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2914 /* FIXME: not quite right; we don't want the
2915 * translation of taskfile registers into a
2916 * sense descriptors, since that's only
2917 * correct for ATA, not ATAPI
2919 ata_gen_passthru_sense(qc);
2922 /* SCSI EH automatically locks door if sdev->locked is
2923 * set. Sometimes door lock request continues to
2924 * fail, for example, when no media is present. This
2925 * creates a loop - SCSI EH issues door lock which
2926 * fails and gets invoked again to acquire sense data
2927 * for the failed command.
2929 * If door lock fails, always clear sdev->locked to
2930 * avoid this infinite loop.
2932 * This may happen before SCSI scan is complete. Make
2933 * sure qc->dev->sdev isn't NULL before dereferencing.
2935 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2936 qc->dev->sdev->locked = 0;
2938 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2943 /* successful completion or old EH failure path */
2944 if (unlikely(err_mask & AC_ERR_DEV)) {
2945 cmd->result = SAM_STAT_CHECK_CONDITION;
2946 atapi_request_sense(qc);
2948 } else if (unlikely(err_mask)) {
2949 /* FIXME: not quite right; we don't want the
2950 * translation of taskfile registers into
2951 * a sense descriptors, since that's only
2952 * correct for ATA, not ATAPI
2954 ata_gen_passthru_sense(qc);
2956 if (cmd->cmnd[0] == INQUIRY && (cmd->cmnd[1] & 0x03) == 0)
2957 atapi_fixup_inquiry(cmd);
2958 cmd->result = SAM_STAT_GOOD;
2964 * atapi_xlat - Initialize PACKET taskfile
2965 * @qc: command structure to be initialized
2968 * spin_lock_irqsave(host lock)
2971 * Zero on success, non-zero on failure.
2973 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2975 struct scsi_cmnd *scmd = qc->scsicmd;
2976 struct ata_device *dev = qc->dev;
2977 int nodata = (scmd->sc_data_direction == DMA_NONE);
2978 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2979 unsigned int nbytes;
2981 memset(qc->cdb, 0, dev->cdb_len);
2982 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2984 qc->complete_fn = atapi_qc_complete;
2986 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2987 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2988 qc->tf.flags |= ATA_TFLAG_WRITE;
2989 DPRINTK("direction: write\n");
2992 qc->tf.command = ATA_CMD_PACKET;
2993 ata_qc_set_pc_nbytes(qc);
2995 /* check whether ATAPI DMA is safe */
2996 if (!nodata && !using_pio && atapi_check_dma(qc))
2999 /* Some controller variants snoop this value for Packet
3000 * transfers to do state machine and FIFO management. Thus we
3001 * want to set it properly, and for DMA where it is
3002 * effectively meaningless.
3004 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
3006 /* Most ATAPI devices which honor transfer chunk size don't
3007 * behave according to the spec when odd chunk size which
3008 * matches the transfer length is specified. If the number of
3009 * bytes to transfer is 2n+1. According to the spec, what
3010 * should happen is to indicate that 2n+1 is going to be
3011 * transferred and transfer 2n+2 bytes where the last byte is
3014 * In practice, this doesn't happen. ATAPI devices first
3015 * indicate and transfer 2n bytes and then indicate and
3016 * transfer 2 bytes where the last byte is padding.
3018 * This inconsistency confuses several controllers which
3019 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
3020 * These controllers use actual number of transferred bytes to
3021 * update DMA poitner and transfer of 4n+2 bytes make those
3022 * controller push DMA pointer by 4n+4 bytes because SATA data
3023 * FISes are aligned to 4 bytes. This causes data corruption
3024 * and buffer overrun.
3026 * Always setting nbytes to even number solves this problem
3027 * because then ATAPI devices don't have to split data at 2n
3033 qc->tf.lbam = (nbytes & 0xFF);
3034 qc->tf.lbah = (nbytes >> 8);
3037 qc->tf.protocol = ATAPI_PROT_NODATA;
3039 qc->tf.protocol = ATAPI_PROT_PIO;
3042 qc->tf.protocol = ATAPI_PROT_DMA;
3043 qc->tf.feature |= ATAPI_PKT_DMA;
3045 if ((dev->flags & ATA_DFLAG_DMADIR) &&
3046 (scmd->sc_data_direction != DMA_TO_DEVICE))
3047 /* some SATA bridges need us to indicate data xfer direction */
3048 qc->tf.feature |= ATAPI_DMADIR;
3052 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
3053 as ATAPI tape drives don't get this right otherwise */
3057 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
3059 if (!sata_pmp_attached(ap)) {
3060 if (likely(devno < ata_link_max_devices(&ap->link)))
3061 return &ap->link.device[devno];
3063 if (likely(devno < ap->nr_pmp_links))
3064 return &ap->pmp_link[devno].device[0];
3070 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
3071 const struct scsi_device *scsidev)
3075 /* skip commands not addressed to targets we simulate */
3076 if (!sata_pmp_attached(ap)) {
3077 if (unlikely(scsidev->channel || scsidev->lun))
3079 devno = scsidev->id;
3081 if (unlikely(scsidev->id || scsidev->lun))
3083 devno = scsidev->channel;
3086 return ata_find_dev(ap, devno);
3090 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
3091 * @ap: ATA port to which the device is attached
3092 * @scsidev: SCSI device from which we derive the ATA device
3094 * Given various information provided in struct scsi_cmnd,
3095 * map that onto an ATA bus, and using that mapping
3096 * determine which ata_device is associated with the
3097 * SCSI command to be sent.
3100 * spin_lock_irqsave(host lock)
3103 * Associated ATA device, or %NULL if not found.
3105 static struct ata_device *
3106 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
3108 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
3110 if (unlikely(!dev || !ata_dev_enabled(dev)))
3117 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
3118 * @byte1: Byte 1 from pass-thru CDB.
3121 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
3124 ata_scsi_map_proto(u8 byte1)
3126 switch((byte1 & 0x1e) >> 1) {
3127 case 3: /* Non-data */
3128 return ATA_PROT_NODATA;
3131 case 10: /* UDMA Data-in */
3132 case 11: /* UDMA Data-Out */
3133 return ATA_PROT_DMA;
3135 case 4: /* PIO Data-in */
3136 case 5: /* PIO Data-out */
3137 return ATA_PROT_PIO;
3139 case 12: /* FPDMA */
3140 return ATA_PROT_NCQ;
3142 case 0: /* Hard Reset */
3144 case 8: /* Device Diagnostic */
3145 case 9: /* Device Reset */
3146 case 7: /* DMA Queued */
3147 case 15: /* Return Response Info */
3148 default: /* Reserved */
3152 return ATA_PROT_UNKNOWN;
3156 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
3157 * @qc: command structure to be initialized
3159 * Handles either 12 or 16-byte versions of the CDB.
3162 * Zero on success, non-zero on failure.
3164 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
3166 struct ata_taskfile *tf = &(qc->tf);
3167 struct scsi_cmnd *scmd = qc->scsicmd;
3168 struct ata_device *dev = qc->dev;
3169 const u8 *cdb = scmd->cmnd;
3172 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) {
3177 if (ata_is_ncq(tf->protocol) && (cdb[2] & 0x3) == 0)
3178 tf->protocol = ATA_PROT_NCQ_NODATA;
3181 tf->flags |= ATA_TFLAG_LBA;
3184 * 12 and 16 byte CDBs use different offsets to
3185 * provide the various register values.
3187 if (cdb[0] == ATA_16) {
3189 * 16-byte CDB - may contain extended commands.
3191 * If that is the case, copy the upper byte register values.
3193 if (cdb[1] & 0x01) {
3194 tf->hob_feature = cdb[3];
3195 tf->hob_nsect = cdb[5];
3196 tf->hob_lbal = cdb[7];
3197 tf->hob_lbam = cdb[9];
3198 tf->hob_lbah = cdb[11];
3199 tf->flags |= ATA_TFLAG_LBA48;
3201 tf->flags &= ~ATA_TFLAG_LBA48;
3204 * Always copy low byte, device and command registers.
3206 tf->feature = cdb[4];
3211 tf->device = cdb[13];
3212 tf->command = cdb[14];
3215 * 12-byte CDB - incapable of extended commands.
3217 tf->flags &= ~ATA_TFLAG_LBA48;
3219 tf->feature = cdb[3];
3224 tf->device = cdb[8];
3225 tf->command = cdb[9];
3228 /* For NCQ commands copy the tag value */
3229 if (ata_is_ncq(tf->protocol))
3230 tf->nsect = qc->tag << 3;
3232 /* enforce correct master/slave bit */
3233 tf->device = dev->devno ?
3234 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
3236 switch (tf->command) {
3237 /* READ/WRITE LONG use a non-standard sect_size */
3238 case ATA_CMD_READ_LONG:
3239 case ATA_CMD_READ_LONG_ONCE:
3240 case ATA_CMD_WRITE_LONG:
3241 case ATA_CMD_WRITE_LONG_ONCE:
3242 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) {
3246 qc->sect_size = scsi_bufflen(scmd);
3249 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3250 case ATA_CMD_CFA_WRITE_NE:
3251 case ATA_CMD_CFA_TRANS_SECT:
3252 case ATA_CMD_CFA_WRITE_MULT_NE:
3253 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3255 case ATA_CMD_READ_EXT:
3256 case ATA_CMD_READ_QUEUED:
3257 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3258 case ATA_CMD_FPDMA_READ:
3259 case ATA_CMD_READ_MULTI:
3260 case ATA_CMD_READ_MULTI_EXT:
3261 case ATA_CMD_PIO_READ:
3262 case ATA_CMD_PIO_READ_EXT:
3263 case ATA_CMD_READ_STREAM_DMA_EXT:
3264 case ATA_CMD_READ_STREAM_EXT:
3265 case ATA_CMD_VERIFY:
3266 case ATA_CMD_VERIFY_EXT:
3268 case ATA_CMD_WRITE_EXT:
3269 case ATA_CMD_WRITE_FUA_EXT:
3270 case ATA_CMD_WRITE_QUEUED:
3271 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
3272 case ATA_CMD_FPDMA_WRITE:
3273 case ATA_CMD_WRITE_MULTI:
3274 case ATA_CMD_WRITE_MULTI_EXT:
3275 case ATA_CMD_WRITE_MULTI_FUA_EXT:
3276 case ATA_CMD_PIO_WRITE:
3277 case ATA_CMD_PIO_WRITE_EXT:
3278 case ATA_CMD_WRITE_STREAM_DMA_EXT:
3279 case ATA_CMD_WRITE_STREAM_EXT:
3280 qc->sect_size = scmd->device->sector_size;
3283 /* Everything else uses 512 byte "sectors" */
3285 qc->sect_size = ATA_SECT_SIZE;
3289 * Set flags so that all registers will be written, pass on
3290 * write indication (used for PIO/DMA setup), result TF is
3291 * copied back and we don't whine too much about its failure.
3293 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3294 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3295 tf->flags |= ATA_TFLAG_WRITE;
3297 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3300 * Set transfer length.
3302 * TODO: find out if we need to do more here to
3303 * cover scatter/gather case.
3305 ata_qc_set_pc_nbytes(qc);
3307 /* We may not issue DMA commands if no DMA mode is set */
3308 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) {
3313 /* sanity check for pio multi commands */
3314 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) {
3319 if (is_multi_taskfile(tf)) {
3320 unsigned int multi_count = 1 << (cdb[1] >> 5);
3322 /* compare the passed through multi_count
3323 * with the cached multi_count of libata
3325 if (multi_count != dev->multi_count)
3326 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3331 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3332 * SET_FEATURES - XFER MODE must be preceded/succeeded
3333 * by an update to hardware-specific registers for each
3334 * controller (i.e. the reason for ->set_piomode(),
3335 * ->set_dmamode(), and ->post_set_mode() hooks).
3337 if (tf->command == ATA_CMD_SET_FEATURES &&
3338 tf->feature == SETFEATURES_XFER) {
3339 fp = (cdb[0] == ATA_16) ? 4 : 3;
3344 * Filter TPM commands by default. These provide an
3345 * essentially uncontrolled encrypted "back door" between
3346 * applications and the disk. Set libata.allow_tpm=1 if you
3347 * have a real reason for wanting to use them. This ensures
3348 * that installed software cannot easily mess stuff up without
3349 * user intent. DVR type users will probably ship with this enabled
3350 * for movie content management.
3352 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3353 * for this and should do in future but that it is not sufficient as
3354 * DCS is an optional feature set. Thus we also do the software filter
3355 * so that we comply with the TC consortium stated goal that the user
3356 * can turn off TC features of their system.
3358 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) {
3359 fp = (cdb[0] == ATA_16) ? 14 : 9;
3366 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff);
3371 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim
3372 * @cmd: SCSI command being translated
3373 * @trmax: Maximum number of entries that will fit in sector_size bytes.
3374 * @sector: Starting sector
3375 * @count: Total Range of request in logical sectors
3377 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted
3380 * Upto 64 entries of the format:
3381 * 63:48 Range Length
3384 * Range Length of 0 is ignored.
3385 * LBA's should be sorted order and not overlap.
3387 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET
3389 * Return: Number of bytes copied into sglist.
3391 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax,
3392 u64 sector, u32 count)
3394 struct scsi_device *sdp = cmd->device;
3395 size_t len = sdp->sector_size;
3399 unsigned long flags;
3401 WARN_ON(len > ATA_SCSI_RBUF_SIZE);
3403 if (len > ATA_SCSI_RBUF_SIZE)
3404 len = ATA_SCSI_RBUF_SIZE;
3406 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
3407 buf = ((void *)ata_scsi_rbuf);
3408 memset(buf, 0, len);
3410 u64 entry = sector |
3411 ((u64)(count > 0xffff ? 0xffff : count) << 48);
3412 buf[i++] = __cpu_to_le64(entry);
3413 if (count <= 0xffff)
3418 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len);
3419 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
3425 * ata_format_dsm_trim_descr() - SATL Write Same to ATA SCT Write Same
3426 * @cmd: SCSI command being translated
3427 * @lba: Starting sector
3428 * @num: Number of sectors to be zero'd.
3430 * Rewrite the WRITE SAME payload to be an SCT Write Same formatted
3432 * NOTE: Writes a pattern (0's) in the foreground.
3434 * Return: Number of bytes copied into sglist.
3436 static size_t ata_format_sct_write_same(struct scsi_cmnd *cmd, u64 lba, u64 num)
3438 struct scsi_device *sdp = cmd->device;
3439 size_t len = sdp->sector_size;
3442 unsigned long flags;
3444 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
3445 buf = ((void *)ata_scsi_rbuf);
3447 put_unaligned_le16(0x0002, &buf[0]); /* SCT_ACT_WRITE_SAME */
3448 put_unaligned_le16(0x0101, &buf[1]); /* WRITE PTRN FG */
3449 put_unaligned_le64(lba, &buf[2]);
3450 put_unaligned_le64(num, &buf[6]);
3451 put_unaligned_le32(0u, &buf[10]); /* pattern */
3453 WARN_ON(len > ATA_SCSI_RBUF_SIZE);
3455 if (len > ATA_SCSI_RBUF_SIZE)
3456 len = ATA_SCSI_RBUF_SIZE;
3458 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len);
3459 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
3465 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same
3466 * @qc: Command to be translated
3468 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or
3469 * an SCT Write Same command.
3470 * Based on WRITE SAME has the UNMAP flag
3471 * When set translate to DSM TRIM
3472 * When clear translate to SCT Write Same
3474 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3476 struct ata_taskfile *tf = &qc->tf;
3477 struct scsi_cmnd *scmd = qc->scsicmd;
3478 struct scsi_device *sdp = scmd->device;
3479 size_t len = sdp->sector_size;
3480 struct ata_device *dev = qc->dev;
3481 const u8 *cdb = scmd->cmnd;
3484 const u32 trmax = len >> 3;
3488 u8 unmap = cdb[1] & 0x8;
3490 /* we may not issue DMA commands if no DMA mode is set */
3491 if (unlikely(!dev->dma_mode))
3492 goto invalid_opcode;
3494 if (unlikely(scmd->cmd_len < 16)) {
3498 scsi_16_lba_len(cdb, &block, &n_block);
3501 /* If trim is not enabled the cmd is invalid. */
3502 if ((dev->horkage & ATA_HORKAGE_NOTRIM) ||
3503 !ata_id_has_trim(dev->id)) {
3508 /* If the request is too large the cmd is invalid */
3509 if (n_block > 0xffff * trmax) {
3514 /* If write same is not available the cmd is invalid */
3515 if (!ata_id_sct_write_same(dev->id)) {
3523 * WRITE SAME always has a sector sized buffer as payload, this
3524 * should never be a multiple entry S/G list.
3526 if (!scsi_sg_count(scmd))
3527 goto invalid_param_len;
3530 * size must match sector size in bytes
3531 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count)
3532 * is defined as number of 512 byte blocks to be transferred.
3535 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block);
3537 goto invalid_param_len;
3539 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3540 /* Newer devices support queued TRIM commands */
3541 tf->protocol = ATA_PROT_NCQ;
3542 tf->command = ATA_CMD_FPDMA_SEND;
3543 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3544 tf->nsect = qc->tag << 3;
3545 tf->hob_feature = (size / 512) >> 8;
3546 tf->feature = size / 512;
3550 tf->protocol = ATA_PROT_DMA;
3551 tf->hob_feature = 0;
3552 tf->feature = ATA_DSM_TRIM;
3553 tf->hob_nsect = (size / 512) >> 8;
3554 tf->nsect = size / 512;
3555 tf->command = ATA_CMD_DSM;
3558 size = ata_format_sct_write_same(scmd, block, n_block);
3560 goto invalid_param_len;
3562 tf->hob_feature = 0;
3568 tf->lbal = ATA_CMD_STANDBYNOW1;
3572 tf->device = ATA_CMD_STANDBYNOW1;
3573 tf->protocol = ATA_PROT_DMA;
3574 tf->command = ATA_CMD_WRITE_LOG_DMA_EXT;
3575 if (unlikely(dev->flags & ATA_DFLAG_PIO))
3576 tf->command = ATA_CMD_WRITE_LOG_EXT;
3579 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3582 ata_qc_set_pc_nbytes(qc);
3587 ata_scsi_set_invalid_field(dev, scmd, fp, bp);
3590 /* "Parameter list length error" */
3591 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3594 /* "Invalid command operation code" */
3595 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0);
3600 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN
3601 * @args: device MAINTENANCE_IN data / SCSI command of interest.
3602 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
3604 * Yields a subset to satisfy scsi_report_opcode()
3607 * spin_lock_irqsave(host lock)
3609 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf)
3611 struct ata_device *dev = args->dev;
3612 u8 *cdb = args->cmd->cmnd;
3614 unsigned int err = 0;
3617 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]);
3626 case SERVICE_ACTION_IN_16:
3629 case SYNCHRONIZE_CACHE:
3633 case TEST_UNIT_READY:
3634 case SEND_DIAGNOSTIC:
3635 case MAINTENANCE_IN:
3647 case MODE_SELECT_10:
3652 if (!ata_id_sct_write_same(dev->id))
3654 /* fallthrough: if SCT ... only enable for ZBC */
3657 if (ata_id_zoned_cap(dev->id) ||
3658 dev->class == ATA_DEV_ZAC)
3665 rbuf[1] = supported; /* supported */
3670 * ata_scsi_report_zones_complete - convert ATA output
3671 * @qc: command structure returning the data
3673 * Convert T-13 little-endian field representation into
3674 * T-10 big-endian field representation.
3677 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc)
3679 struct scsi_cmnd *scmd = qc->scsicmd;
3680 struct sg_mapping_iter miter;
3681 unsigned long flags;
3682 unsigned int bytes = 0;
3684 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd),
3685 SG_MITER_TO_SG | SG_MITER_ATOMIC);
3687 local_irq_save(flags);
3688 while (sg_miter_next(&miter)) {
3689 unsigned int offset = 0;
3694 u64 max_lba, opt_lba;
3697 /* Swizzle header */
3699 list_length = get_unaligned_le32(&hdr[0]);
3700 same = get_unaligned_le16(&hdr[4]);
3701 max_lba = get_unaligned_le64(&hdr[8]);
3702 opt_lba = get_unaligned_le64(&hdr[16]);
3703 put_unaligned_be32(list_length, &hdr[0]);
3704 hdr[4] = same & 0xf;
3705 put_unaligned_be64(max_lba, &hdr[8]);
3706 put_unaligned_be64(opt_lba, &hdr[16]);
3710 while (offset < miter.length) {
3712 u8 cond, type, non_seq, reset;
3713 u64 size, start, wp;
3715 /* Swizzle zone descriptor */
3716 rec = miter.addr + offset;
3717 type = rec[0] & 0xf;
3718 cond = (rec[1] >> 4) & 0xf;
3719 non_seq = (rec[1] & 2);
3720 reset = (rec[1] & 1);
3721 size = get_unaligned_le64(&rec[8]);
3722 start = get_unaligned_le64(&rec[16]);
3723 wp = get_unaligned_le64(&rec[24]);
3725 rec[1] = (cond << 4) | non_seq | reset;
3726 put_unaligned_be64(size, &rec[8]);
3727 put_unaligned_be64(start, &rec[16]);
3728 put_unaligned_be64(wp, &rec[24]);
3729 WARN_ON(offset + 64 > miter.length);
3734 sg_miter_stop(&miter);
3735 local_irq_restore(flags);
3737 ata_scsi_qc_complete(qc);
3740 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc)
3742 struct ata_taskfile *tf = &qc->tf;
3743 struct scsi_cmnd *scmd = qc->scsicmd;
3744 const u8 *cdb = scmd->cmnd;
3745 u16 sect, fp = (u16)-1;
3746 u8 sa, options, bp = 0xff;
3750 if (unlikely(scmd->cmd_len < 16)) {
3751 ata_dev_warn(qc->dev, "invalid cdb length %d\n",
3756 scsi_16_lba_len(cdb, &block, &n_block);
3757 if (n_block != scsi_bufflen(scmd)) {
3758 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n",
3759 n_block, scsi_bufflen(scmd));
3760 goto invalid_param_len;
3763 if (sa != ZI_REPORT_ZONES) {
3764 ata_dev_warn(qc->dev, "invalid service action %d\n", sa);
3769 * ZAC allows only for transfers in 512 byte blocks,
3770 * and uses a 16 bit value for the transfer count.
3772 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) {
3773 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block);
3774 goto invalid_param_len;
3776 sect = n_block / 512;
3777 options = cdb[14] & 0xbf;
3779 if (ata_ncq_enabled(qc->dev) &&
3780 ata_fpdma_zac_mgmt_in_supported(qc->dev)) {
3781 tf->protocol = ATA_PROT_NCQ;
3782 tf->command = ATA_CMD_FPDMA_RECV;
3783 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f;
3784 tf->nsect = qc->tag << 3;
3785 tf->feature = sect & 0xff;
3786 tf->hob_feature = (sect >> 8) & 0xff;
3787 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8);
3789 tf->command = ATA_CMD_ZAC_MGMT_IN;
3790 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES;
3791 tf->protocol = ATA_PROT_DMA;
3792 tf->hob_feature = options;
3793 tf->hob_nsect = (sect >> 8) & 0xff;
3794 tf->nsect = sect & 0xff;
3796 tf->device = ATA_LBA;
3797 tf->lbah = (block >> 16) & 0xff;
3798 tf->lbam = (block >> 8) & 0xff;
3799 tf->lbal = block & 0xff;
3800 tf->hob_lbah = (block >> 40) & 0xff;
3801 tf->hob_lbam = (block >> 32) & 0xff;
3802 tf->hob_lbal = (block >> 24) & 0xff;
3804 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3805 qc->flags |= ATA_QCFLAG_RESULT_TF;
3807 ata_qc_set_pc_nbytes(qc);
3809 qc->complete_fn = ata_scsi_report_zones_complete;
3814 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
3818 /* "Parameter list length error" */
3819 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3823 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc)
3825 struct ata_taskfile *tf = &qc->tf;
3826 struct scsi_cmnd *scmd = qc->scsicmd;
3827 struct ata_device *dev = qc->dev;
3828 const u8 *cdb = scmd->cmnd;
3834 if (unlikely(scmd->cmd_len < 16)) {
3840 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) &&
3841 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) {
3846 scsi_16_lba_len(cdb, &block, &n_block);
3849 * ZAC MANAGEMENT OUT doesn't define any length
3851 goto invalid_param_len;
3853 if (block > dev->n_sectors)
3856 all = cdb[14] & 0x1;
3858 if (ata_ncq_enabled(qc->dev) &&
3859 ata_fpdma_zac_mgmt_out_supported(qc->dev)) {
3860 tf->protocol = ATA_PROT_NCQ_NODATA;
3861 tf->command = ATA_CMD_NCQ_NON_DATA;
3862 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT;
3863 tf->nsect = qc->tag << 3;
3864 tf->auxiliary = sa | ((u16)all << 8);
3866 tf->protocol = ATA_PROT_NODATA;
3867 tf->command = ATA_CMD_ZAC_MGMT_OUT;
3869 tf->hob_feature = all;
3871 tf->lbah = (block >> 16) & 0xff;
3872 tf->lbam = (block >> 8) & 0xff;
3873 tf->lbal = block & 0xff;
3874 tf->hob_lbah = (block >> 40) & 0xff;
3875 tf->hob_lbam = (block >> 32) & 0xff;
3876 tf->hob_lbal = (block >> 24) & 0xff;
3877 tf->device = ATA_LBA;
3878 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3883 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
3886 /* "Logical Block Address out of range" */
3887 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x00);
3890 /* "Parameter list length error" */
3891 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3896 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3897 * @qc: Storage for translated ATA taskfile
3898 * @buf: input buffer
3899 * @len: number of valid bytes in the input buffer
3900 * @fp: out parameter for the failed field on error
3902 * Prepare a taskfile to modify caching information for the device.
3907 static int ata_mselect_caching(struct ata_queued_cmd *qc,
3908 const u8 *buf, int len, u16 *fp)
3910 struct ata_taskfile *tf = &qc->tf;
3911 struct ata_device *dev = qc->dev;
3912 u8 mpage[CACHE_MPAGE_LEN];
3917 * The first two bytes of def_cache_mpage are a header, so offsets
3918 * in mpage are off by 2 compared to buf. Same for len.
3921 if (len != CACHE_MPAGE_LEN - 2) {
3922 if (len < CACHE_MPAGE_LEN - 2)
3925 *fp = CACHE_MPAGE_LEN - 2;
3929 wce = buf[0] & (1 << 2);
3932 * Check that read-only bits are not modified.
3934 ata_msense_caching(dev->id, mpage, false);
3935 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) {
3938 if (mpage[i + 2] != buf[i]) {
3944 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3945 tf->protocol = ATA_PROT_NODATA;
3947 tf->command = ATA_CMD_SET_FEATURES;
3948 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3953 * ata_mselect_control - Simulate MODE SELECT for control page
3954 * @qc: Storage for translated ATA taskfile
3955 * @buf: input buffer
3956 * @len: number of valid bytes in the input buffer
3957 * @fp: out parameter for the failed field on error
3959 * Prepare a taskfile to modify caching information for the device.
3964 static int ata_mselect_control(struct ata_queued_cmd *qc,
3965 const u8 *buf, int len, u16 *fp)
3967 struct ata_device *dev = qc->dev;
3968 u8 mpage[CONTROL_MPAGE_LEN];
3973 * The first two bytes of def_control_mpage are a header, so offsets
3974 * in mpage are off by 2 compared to buf. Same for len.
3977 if (len != CONTROL_MPAGE_LEN - 2) {
3978 if (len < CONTROL_MPAGE_LEN - 2)
3981 *fp = CONTROL_MPAGE_LEN - 2;
3985 d_sense = buf[0] & (1 << 2);
3988 * Check that read-only bits are not modified.
3990 ata_msense_control(dev, mpage, false);
3991 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) {
3994 if (mpage[2 + i] != buf[i]) {
3999 if (d_sense & (1 << 2))
4000 dev->flags |= ATA_DFLAG_D_SENSE;
4002 dev->flags &= ~ATA_DFLAG_D_SENSE;
4007 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
4008 * @qc: Storage for translated ATA taskfile
4010 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
4011 * Assume this is invoked for direct access devices (e.g. disks) only.
4012 * There should be no block descriptor for other device types.
4015 * spin_lock_irqsave(host lock)
4017 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
4019 struct scsi_cmnd *scmd = qc->scsicmd;
4020 const u8 *cdb = scmd->cmnd;
4023 unsigned six_byte, pg_len, hdr_len, bd_len;
4030 six_byte = (cdb[0] == MODE_SELECT);
4032 if (scmd->cmd_len < 5) {
4040 if (scmd->cmd_len < 9) {
4045 len = (cdb[7] << 8) + cdb[8];
4049 /* We only support PF=1, SP=0. */
4050 if ((cdb[1] & 0x11) != 0x10) {
4052 bp = (cdb[1] & 0x01) ? 1 : 5;
4056 /* Test early for possible overrun. */
4057 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
4058 goto invalid_param_len;
4060 p = page_address(sg_page(scsi_sglist(scmd)));
4062 /* Move past header and block descriptors. */
4064 goto invalid_param_len;
4069 bd_len = (p[6] << 8) + p[7];
4074 goto invalid_param_len;
4075 if (bd_len != 0 && bd_len != 8) {
4076 fp = (six_byte) ? 3 : 6;
4077 fp += bd_len + hdr_len;
4086 /* Parse both possible formats for the mode page headers. */
4090 goto invalid_param_len;
4093 pg_len = (p[2] << 8) | p[3];
4098 goto invalid_param_len;
4107 * No mode subpages supported (yet) but asking for _all_
4108 * subpages may be valid
4110 if (spg && (spg != ALL_SUB_MPAGES)) {
4111 fp = (p[0] & 0x40) ? 1 : 0;
4112 fp += hdr_len + bd_len;
4116 goto invalid_param_len;
4120 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) {
4121 fp += hdr_len + bd_len;
4126 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) {
4127 fp += hdr_len + bd_len;
4130 goto skip; /* No ATA command to send */
4133 default: /* invalid page code */
4134 fp = bd_len + hdr_len;
4139 * Only one page has changeable data, so we only support setting one
4148 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
4152 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp);
4156 /* "Parameter list length error" */
4157 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
4161 scmd->result = SAM_STAT_GOOD;
4166 * ata_get_xlat_func - check if SCSI to ATA translation is possible
4168 * @cmd: SCSI command opcode to consider
4170 * Look up the SCSI command given, and determine whether the
4171 * SCSI command is to be translated or simulated.
4174 * Pointer to translation function if possible, %NULL if not.
4177 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
4187 return ata_scsi_rw_xlat;
4190 return ata_scsi_write_same_xlat;
4192 case SYNCHRONIZE_CACHE:
4193 if (ata_try_flush_cache(dev))
4194 return ata_scsi_flush_xlat;
4199 return ata_scsi_verify_xlat;
4203 return ata_scsi_pass_thru;
4206 case MODE_SELECT_10:
4207 return ata_scsi_mode_select_xlat;
4211 return ata_scsi_zbc_in_xlat;
4214 return ata_scsi_zbc_out_xlat;
4217 return ata_scsi_start_stop_xlat;
4224 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
4225 * @ap: ATA port to which the command was being sent
4226 * @cmd: SCSI command to dump
4228 * Prints the contents of a SCSI command via printk().
4231 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
4232 struct scsi_cmnd *cmd)
4235 struct scsi_device *scsidev = cmd->device;
4237 DPRINTK("CDB (%u:%d,%d,%d) %9ph\n",
4239 scsidev->channel, scsidev->id, scsidev->lun,
4244 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
4245 struct ata_device *dev)
4247 u8 scsi_op = scmd->cmnd[0];
4248 ata_xlat_func_t xlat_func;
4251 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
4252 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
4255 xlat_func = ata_get_xlat_func(dev, scsi_op);
4257 if (unlikely(!scmd->cmd_len))
4261 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
4262 /* relay SCSI command to ATAPI device */
4263 int len = COMMAND_SIZE(scsi_op);
4264 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
4267 xlat_func = atapi_xlat;
4269 /* ATA_16 passthru, treat as an ATA command */
4270 if (unlikely(scmd->cmd_len > 16))
4273 xlat_func = ata_get_xlat_func(dev, scsi_op);
4278 rc = ata_scsi_translate(dev, scmd, xlat_func);
4280 ata_scsi_simulate(dev, scmd);
4285 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
4286 scmd->cmd_len, scsi_op, dev->cdb_len);
4287 scmd->result = DID_ERROR << 16;
4288 scmd->scsi_done(scmd);
4293 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
4294 * @shost: SCSI host of command to be sent
4295 * @cmd: SCSI command to be sent
4297 * In some cases, this function translates SCSI commands into
4298 * ATA taskfiles, and queues the taskfiles to be sent to
4299 * hardware. In other cases, this function simulates a
4300 * SCSI device by evaluating and responding to certain
4301 * SCSI commands. This creates the overall effect of
4302 * ATA and ATAPI devices appearing as SCSI devices.
4308 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4311 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
4313 struct ata_port *ap;
4314 struct ata_device *dev;
4315 struct scsi_device *scsidev = cmd->device;
4317 unsigned long irq_flags;
4319 ap = ata_shost_to_port(shost);
4321 spin_lock_irqsave(ap->lock, irq_flags);
4323 ata_scsi_dump_cdb(ap, cmd);
4325 dev = ata_scsi_find_dev(ap, scsidev);
4327 rc = __ata_scsi_queuecmd(cmd, dev);
4329 cmd->result = (DID_BAD_TARGET << 16);
4330 cmd->scsi_done(cmd);
4333 spin_unlock_irqrestore(ap->lock, irq_flags);
4339 * ata_scsi_simulate - simulate SCSI command on ATA device
4340 * @dev: the target device
4341 * @cmd: SCSI command being sent to device.
4343 * Interprets and directly executes a select list of SCSI commands
4344 * that can be handled internally.
4347 * spin_lock_irqsave(host lock)
4350 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
4352 struct ata_scsi_args args;
4353 const u8 *scsicmd = cmd->cmnd;
4360 switch(scsicmd[0]) {
4362 if (scsicmd[1] & 2) /* is CmdDt set? */
4363 ata_scsi_invalid_field(dev, cmd, 1);
4364 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
4365 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
4366 else switch (scsicmd[2]) {
4368 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
4371 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
4374 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
4377 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
4380 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
4383 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
4386 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
4389 if (dev->flags & ATA_DFLAG_ZAC) {
4390 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6);
4395 ata_scsi_invalid_field(dev, cmd, 2);
4402 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
4406 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4409 case SERVICE_ACTION_IN_16:
4410 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
4411 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4413 ata_scsi_invalid_field(dev, cmd, 1);
4417 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
4421 ata_scsi_set_sense(dev, cmd, 0, 0, 0);
4422 cmd->result = (DRIVER_SENSE << 24);
4423 cmd->scsi_done(cmd);
4426 /* if we reach this, then writeback caching is disabled,
4427 * turning this into a no-op.
4429 case SYNCHRONIZE_CACHE:
4432 /* no-op's, complete with success */
4436 case TEST_UNIT_READY:
4437 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
4440 case SEND_DIAGNOSTIC:
4441 tmp8 = scsicmd[1] & ~(1 << 3);
4442 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
4443 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
4445 ata_scsi_invalid_field(dev, cmd, 1);
4448 case MAINTENANCE_IN:
4449 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES)
4450 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in);
4452 ata_scsi_invalid_field(dev, cmd, 1);
4455 /* all other commands */
4457 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0);
4458 /* "Invalid command operation code" */
4459 cmd->scsi_done(cmd);
4464 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
4468 for (i = 0; i < host->n_ports; i++) {
4469 struct ata_port *ap = host->ports[i];
4470 struct Scsi_Host *shost;
4473 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
4477 shost->eh_noresume = 1;
4478 *(struct ata_port **)&shost->hostdata[0] = ap;
4479 ap->scsi_host = shost;
4481 shost->transportt = ata_scsi_transport_template;
4482 shost->unique_id = ap->print_id;
4485 shost->max_channel = 1;
4486 shost->max_cmd_len = 16;
4488 /* Schedule policy is determined by ->qc_defer()
4489 * callback and it needs to see every deferred qc.
4490 * Set host_blocked to 1 to prevent SCSI midlayer from
4491 * automatically deferring requests.
4493 shost->max_host_blocked = 1;
4495 rc = scsi_add_host_with_dma(ap->scsi_host,
4496 &ap->tdev, ap->host->dev);
4504 scsi_host_put(host->ports[i]->scsi_host);
4507 struct Scsi_Host *shost = host->ports[i]->scsi_host;
4509 scsi_remove_host(shost);
4510 scsi_host_put(shost);
4515 void ata_scsi_scan_host(struct ata_port *ap, int sync)
4518 struct ata_device *last_failed_dev = NULL;
4519 struct ata_link *link;
4520 struct ata_device *dev;
4523 ata_for_each_link(link, ap, EDGE) {
4524 ata_for_each_dev(dev, link, ENABLED) {
4525 struct scsi_device *sdev;
4526 int channel = 0, id = 0;
4531 if (ata_is_host_link(link))
4534 channel = link->pmp;
4536 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
4538 if (!IS_ERR(sdev)) {
4540 scsi_device_put(sdev);
4547 /* If we scanned while EH was in progress or allocation
4548 * failure occurred, scan would have failed silently. Check
4549 * whether all devices are attached.
4551 ata_for_each_link(link, ap, EDGE) {
4552 ata_for_each_dev(dev, link, ENABLED) {
4561 /* we're missing some SCSI devices */
4563 /* If caller requested synchrnous scan && we've made
4564 * any progress, sleep briefly and repeat.
4566 if (dev != last_failed_dev) {
4568 last_failed_dev = dev;
4572 /* We might be failing to detect boot device, give it
4573 * a few more chances.
4581 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
4584 queue_delayed_work(system_long_wq, &ap->hotplug_task,
4585 round_jiffies_relative(HZ));
4589 * ata_scsi_offline_dev - offline attached SCSI device
4590 * @dev: ATA device to offline attached SCSI device for
4592 * This function is called from ata_eh_hotplug() and responsible
4593 * for taking the SCSI device attached to @dev offline. This
4594 * function is called with host lock which protects dev->sdev
4598 * spin_lock_irqsave(host lock)
4601 * 1 if attached SCSI device exists, 0 otherwise.
4603 int ata_scsi_offline_dev(struct ata_device *dev)
4606 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
4613 * ata_scsi_remove_dev - remove attached SCSI device
4614 * @dev: ATA device to remove attached SCSI device for
4616 * This function is called from ata_eh_scsi_hotplug() and
4617 * responsible for removing the SCSI device attached to @dev.
4620 * Kernel thread context (may sleep).
4622 static void ata_scsi_remove_dev(struct ata_device *dev)
4624 struct ata_port *ap = dev->link->ap;
4625 struct scsi_device *sdev;
4626 unsigned long flags;
4628 /* Alas, we need to grab scan_mutex to ensure SCSI device
4629 * state doesn't change underneath us and thus
4630 * scsi_device_get() always succeeds. The mutex locking can
4631 * be removed if there is __scsi_device_get() interface which
4632 * increments reference counts regardless of device state.
4634 mutex_lock(&ap->scsi_host->scan_mutex);
4635 spin_lock_irqsave(ap->lock, flags);
4637 /* clearing dev->sdev is protected by host lock */
4642 /* If user initiated unplug races with us, sdev can go
4643 * away underneath us after the host lock and
4644 * scan_mutex are released. Hold onto it.
4646 if (scsi_device_get(sdev) == 0) {
4647 /* The following ensures the attached sdev is
4648 * offline on return from ata_scsi_offline_dev()
4649 * regardless it wins or loses the race
4650 * against this function.
4652 scsi_device_set_state(sdev, SDEV_OFFLINE);
4659 spin_unlock_irqrestore(ap->lock, flags);
4660 mutex_unlock(&ap->scsi_host->scan_mutex);
4663 ata_dev_info(dev, "detaching (SCSI %s)\n",
4664 dev_name(&sdev->sdev_gendev));
4666 scsi_remove_device(sdev);
4667 scsi_device_put(sdev);
4671 static void ata_scsi_handle_link_detach(struct ata_link *link)
4673 struct ata_port *ap = link->ap;
4674 struct ata_device *dev;
4676 ata_for_each_dev(dev, link, ALL) {
4677 unsigned long flags;
4679 if (!(dev->flags & ATA_DFLAG_DETACHED))
4682 spin_lock_irqsave(ap->lock, flags);
4683 dev->flags &= ~ATA_DFLAG_DETACHED;
4684 spin_unlock_irqrestore(ap->lock, flags);
4686 if (zpodd_dev_enabled(dev))
4689 ata_scsi_remove_dev(dev);
4694 * ata_scsi_media_change_notify - send media change event
4695 * @dev: Pointer to the disk device with media change event
4697 * Tell the block layer to send a media change notification
4701 * spin_lock_irqsave(host lock)
4703 void ata_scsi_media_change_notify(struct ata_device *dev)
4706 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
4711 * ata_scsi_hotplug - SCSI part of hotplug
4712 * @work: Pointer to ATA port to perform SCSI hotplug on
4714 * Perform SCSI part of hotplug. It's executed from a separate
4715 * workqueue after EH completes. This is necessary because SCSI
4716 * hot plugging requires working EH and hot unplugging is
4717 * synchronized with hot plugging with a mutex.
4720 * Kernel thread context (may sleep).
4722 void ata_scsi_hotplug(struct work_struct *work)
4724 struct ata_port *ap =
4725 container_of(work, struct ata_port, hotplug_task.work);
4728 if (ap->pflags & ATA_PFLAG_UNLOADING) {
4729 DPRINTK("ENTER/EXIT - unloading\n");
4736 * The block layer suspend/resume path is fundamentally broken due
4737 * to freezable kthreads and workqueue and may deadlock if a block
4738 * device gets removed while resume is in progress. I don't know
4739 * what the solution is short of removing freezable kthreads and
4740 * workqueues altogether.
4742 * The following is an ugly hack to avoid kicking off device
4743 * removal while freezer is active. This is a joke but does avoid
4744 * this particular deadlock scenario.
4746 * https://bugzilla.kernel.org/show_bug.cgi?id=62801
4747 * http://marc.info/?l=linux-kernel&m=138695698516487
4749 #ifdef CONFIG_FREEZER
4755 mutex_lock(&ap->scsi_scan_mutex);
4757 /* Unplug detached devices. We cannot use link iterator here
4758 * because PMP links have to be scanned even if PMP is
4759 * currently not attached. Iterate manually.
4761 ata_scsi_handle_link_detach(&ap->link);
4763 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
4764 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
4766 /* scan for new ones */
4767 ata_scsi_scan_host(ap, 0);
4769 mutex_unlock(&ap->scsi_scan_mutex);
4774 * ata_scsi_user_scan - indication for user-initiated bus scan
4775 * @shost: SCSI host to scan
4776 * @channel: Channel to scan
4780 * This function is called when user explicitly requests bus
4781 * scan. Set probe pending flag and invoke EH.
4784 * SCSI layer (we don't care)
4789 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
4790 unsigned int id, u64 lun)
4792 struct ata_port *ap = ata_shost_to_port(shost);
4793 unsigned long flags;
4796 if (!ap->ops->error_handler)
4799 if (lun != SCAN_WILD_CARD && lun)
4802 if (!sata_pmp_attached(ap)) {
4803 if (channel != SCAN_WILD_CARD && channel)
4807 if (id != SCAN_WILD_CARD && id)
4812 spin_lock_irqsave(ap->lock, flags);
4814 if (devno == SCAN_WILD_CARD) {
4815 struct ata_link *link;
4817 ata_for_each_link(link, ap, EDGE) {
4818 struct ata_eh_info *ehi = &link->eh_info;
4819 ehi->probe_mask |= ATA_ALL_DEVICES;
4820 ehi->action |= ATA_EH_RESET;
4823 struct ata_device *dev = ata_find_dev(ap, devno);
4826 struct ata_eh_info *ehi = &dev->link->eh_info;
4827 ehi->probe_mask |= 1 << dev->devno;
4828 ehi->action |= ATA_EH_RESET;
4834 ata_port_schedule_eh(ap);
4835 spin_unlock_irqrestore(ap->lock, flags);
4836 ata_port_wait_eh(ap);
4838 spin_unlock_irqrestore(ap->lock, flags);
4844 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4845 * @work: Pointer to ATA port to perform scsi_rescan_device()
4847 * After ATA pass thru (SAT) commands are executed successfully,
4848 * libata need to propagate the changes to SCSI layer.
4851 * Kernel thread context (may sleep).
4853 void ata_scsi_dev_rescan(struct work_struct *work)
4855 struct ata_port *ap =
4856 container_of(work, struct ata_port, scsi_rescan_task);
4857 struct ata_link *link;
4858 struct ata_device *dev;
4859 unsigned long flags;
4861 mutex_lock(&ap->scsi_scan_mutex);
4862 spin_lock_irqsave(ap->lock, flags);
4864 ata_for_each_link(link, ap, EDGE) {
4865 ata_for_each_dev(dev, link, ENABLED) {
4866 struct scsi_device *sdev = dev->sdev;
4870 if (scsi_device_get(sdev))
4873 spin_unlock_irqrestore(ap->lock, flags);
4874 scsi_rescan_device(&(sdev->sdev_gendev));
4875 scsi_device_put(sdev);
4876 spin_lock_irqsave(ap->lock, flags);
4880 spin_unlock_irqrestore(ap->lock, flags);
4881 mutex_unlock(&ap->scsi_scan_mutex);
4885 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4886 * @host: ATA host container for all SAS ports
4887 * @port_info: Information from low-level host driver
4888 * @shost: SCSI host that the scsi device is attached to
4891 * PCI/etc. bus probe sem.
4894 * ata_port pointer on success / NULL on failure.
4897 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
4898 struct ata_port_info *port_info,
4899 struct Scsi_Host *shost)
4901 struct ata_port *ap;
4903 ap = ata_port_alloc(host);
4908 ap->lock = &host->lock;
4909 ap->pio_mask = port_info->pio_mask;
4910 ap->mwdma_mask = port_info->mwdma_mask;
4911 ap->udma_mask = port_info->udma_mask;
4912 ap->flags |= port_info->flags;
4913 ap->ops = port_info->port_ops;
4914 ap->cbl = ATA_CBL_SATA;
4918 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
4921 * ata_sas_port_start - Set port up for dma.
4922 * @ap: Port to initialize
4924 * Called just after data structures for each port are
4927 * May be used as the port_start() entry in ata_port_operations.
4930 * Inherited from caller.
4932 int ata_sas_port_start(struct ata_port *ap)
4935 * the port is marked as frozen at allocation time, but if we don't
4936 * have new eh, we won't thaw it
4938 if (!ap->ops->error_handler)
4939 ap->pflags &= ~ATA_PFLAG_FROZEN;
4942 EXPORT_SYMBOL_GPL(ata_sas_port_start);
4945 * ata_port_stop - Undo ata_sas_port_start()
4946 * @ap: Port to shut down
4948 * May be used as the port_stop() entry in ata_port_operations.
4951 * Inherited from caller.
4954 void ata_sas_port_stop(struct ata_port *ap)
4957 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
4960 * ata_sas_async_probe - simply schedule probing and return
4961 * @ap: Port to probe
4963 * For batch scheduling of probe for sas attached ata devices, assumes
4964 * the port has already been through ata_sas_port_init()
4966 void ata_sas_async_probe(struct ata_port *ap)
4968 __ata_port_probe(ap);
4970 EXPORT_SYMBOL_GPL(ata_sas_async_probe);
4972 int ata_sas_sync_probe(struct ata_port *ap)
4974 return ata_port_probe(ap);
4976 EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
4980 * ata_sas_port_init - Initialize a SATA device
4981 * @ap: SATA port to initialize
4984 * PCI/etc. bus probe sem.
4987 * Zero on success, non-zero on error.
4990 int ata_sas_port_init(struct ata_port *ap)
4992 int rc = ap->ops->port_start(ap);
4996 ap->print_id = atomic_inc_return(&ata_print_id);
4999 EXPORT_SYMBOL_GPL(ata_sas_port_init);
5002 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
5003 * @ap: SATA port to destroy
5007 void ata_sas_port_destroy(struct ata_port *ap)
5009 if (ap->ops->port_stop)
5010 ap->ops->port_stop(ap);
5013 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
5016 * ata_sas_slave_configure - Default slave_config routine for libata devices
5017 * @sdev: SCSI device to configure
5018 * @ap: ATA port to which SCSI device is attached
5024 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
5026 ata_scsi_sdev_config(sdev);
5027 ata_scsi_dev_config(sdev, ap->link.device);
5030 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
5033 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
5034 * @cmd: SCSI command to be sent
5035 * @ap: ATA port to which the command is being sent
5038 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
5042 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
5046 ata_scsi_dump_cdb(ap, cmd);
5048 if (likely(ata_dev_enabled(ap->link.device)))
5049 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
5051 cmd->result = (DID_BAD_TARGET << 16);
5052 cmd->scsi_done(cmd);
5056 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
5058 int ata_sas_allocate_tag(struct ata_port *ap)
5060 unsigned int max_queue = ap->host->n_tags;
5061 unsigned int i, tag;
5063 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) {
5064 tag = tag < max_queue ? tag : 0;
5066 /* the last tag is reserved for internal command. */
5067 if (tag == ATA_TAG_INTERNAL)
5070 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) {
5071 ap->sas_last_tag = tag;
5078 void ata_sas_free_tag(unsigned int tag, struct ata_port *ap)
5080 clear_bit(tag, &ap->sas_tag_allocated);