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>
55 #include "libata-transport.h"
57 #define ATA_SCSI_RBUF_SIZE 4096
59 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
60 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
62 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
64 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
65 const struct scsi_device *scsidev);
66 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
67 const struct scsi_device *scsidev);
69 #define RW_RECOVERY_MPAGE 0x1
70 #define RW_RECOVERY_MPAGE_LEN 12
71 #define CACHE_MPAGE 0x8
72 #define CACHE_MPAGE_LEN 20
73 #define CONTROL_MPAGE 0xa
74 #define CONTROL_MPAGE_LEN 12
75 #define ALL_MPAGES 0x3f
76 #define ALL_SUB_MPAGES 0xff
79 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
81 RW_RECOVERY_MPAGE_LEN - 2,
83 0, /* read retry count */
85 0, /* write retry count */
89 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
92 0, /* contains WCE, needs to be 0 for logic */
93 0, 0, 0, 0, 0, 0, 0, 0, 0,
94 0, /* contains DRA, needs to be 0 for logic */
98 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
100 CONTROL_MPAGE_LEN - 2,
101 2, /* DSENSE=0, GLTSD=1 */
102 0, /* [QAM+QERR may be 1, see 05-359r1] */
103 0, 0, 0, 0, 0xff, 0xff,
104 0, 30 /* extended self test time, see 05-359r1 */
107 static const char *ata_lpm_policy_names[] = {
108 [ATA_LPM_UNKNOWN] = "max_performance",
109 [ATA_LPM_MAX_POWER] = "max_performance",
110 [ATA_LPM_MED_POWER] = "medium_power",
111 [ATA_LPM_MIN_POWER] = "min_power",
114 static ssize_t ata_scsi_lpm_store(struct device *device,
115 struct device_attribute *attr,
116 const char *buf, size_t count)
118 struct Scsi_Host *shost = class_to_shost(device);
119 struct ata_port *ap = ata_shost_to_port(shost);
120 struct ata_link *link;
121 struct ata_device *dev;
122 enum ata_lpm_policy policy;
125 /* UNKNOWN is internal state, iterate from MAX_POWER */
126 for (policy = ATA_LPM_MAX_POWER;
127 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
128 const char *name = ata_lpm_policy_names[policy];
130 if (strncmp(name, buf, strlen(name)) == 0)
133 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
136 spin_lock_irqsave(ap->lock, flags);
138 ata_for_each_link(link, ap, EDGE) {
139 ata_for_each_dev(dev, &ap->link, ENABLED) {
140 if (dev->horkage & ATA_HORKAGE_NOLPM) {
147 ap->target_lpm_policy = policy;
148 ata_port_schedule_eh(ap);
150 spin_unlock_irqrestore(ap->lock, flags);
154 static ssize_t ata_scsi_lpm_show(struct device *dev,
155 struct device_attribute *attr, char *buf)
157 struct Scsi_Host *shost = class_to_shost(dev);
158 struct ata_port *ap = ata_shost_to_port(shost);
160 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
163 return snprintf(buf, PAGE_SIZE, "%s\n",
164 ata_lpm_policy_names[ap->target_lpm_policy]);
166 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
167 ata_scsi_lpm_show, ata_scsi_lpm_store);
168 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
170 static ssize_t ata_scsi_park_show(struct device *device,
171 struct device_attribute *attr, char *buf)
173 struct scsi_device *sdev = to_scsi_device(device);
175 struct ata_link *link;
176 struct ata_device *dev;
178 unsigned int uninitialized_var(msecs);
181 ap = ata_shost_to_port(sdev->host);
183 spin_lock_irq(ap->lock);
184 dev = ata_scsi_find_dev(ap, sdev);
189 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
196 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
197 link->eh_context.unloaded_mask & (1 << dev->devno) &&
198 time_after(dev->unpark_deadline, now))
199 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
204 spin_unlock_irq(ap->lock);
206 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
209 static ssize_t ata_scsi_park_store(struct device *device,
210 struct device_attribute *attr,
211 const char *buf, size_t len)
213 struct scsi_device *sdev = to_scsi_device(device);
215 struct ata_device *dev;
220 rc = kstrtol(buf, 10, &input);
225 if (input > ATA_TMOUT_MAX_PARK) {
227 input = ATA_TMOUT_MAX_PARK;
230 ap = ata_shost_to_port(sdev->host);
232 spin_lock_irqsave(ap->lock, flags);
233 dev = ata_scsi_find_dev(ap, sdev);
234 if (unlikely(!dev)) {
238 if (dev->class != ATA_DEV_ATA &&
239 dev->class != ATA_DEV_ZAC) {
245 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
250 dev->unpark_deadline = ata_deadline(jiffies, input);
251 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
252 ata_port_schedule_eh(ap);
253 complete(&ap->park_req_pending);
257 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
260 dev->flags |= ATA_DFLAG_NO_UNLOAD;
265 spin_unlock_irqrestore(ap->lock, flags);
267 return rc ? rc : len;
269 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
270 ata_scsi_park_show, ata_scsi_park_store);
271 EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
273 void ata_scsi_set_sense(struct ata_device *dev, struct scsi_cmnd *cmd,
274 u8 sk, u8 asc, u8 ascq)
276 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
281 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
283 scsi_build_sense_buffer(d_sense, cmd->sense_buffer, sk, asc, ascq);
286 void ata_scsi_set_sense_information(struct ata_device *dev,
287 struct scsi_cmnd *cmd,
288 const struct ata_taskfile *tf)
295 information = ata_tf_read_block(tf, dev);
296 if (information == U64_MAX)
299 scsi_set_sense_information(cmd->sense_buffer,
300 SCSI_SENSE_BUFFERSIZE, information);
303 static void ata_scsi_set_invalid_field(struct ata_device *dev,
304 struct scsi_cmnd *cmd, u16 field, u8 bit)
306 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x24, 0x0);
307 /* "Invalid field in CDB" */
308 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
312 static void ata_scsi_set_invalid_parameter(struct ata_device *dev,
313 struct scsi_cmnd *cmd, u16 field)
315 /* "Invalid field in parameter list" */
316 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x26, 0x0);
317 scsi_set_sense_field_pointer(cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE,
322 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
323 const char *buf, size_t count)
325 struct Scsi_Host *shost = class_to_shost(dev);
326 struct ata_port *ap = ata_shost_to_port(shost);
327 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
328 return ap->ops->em_store(ap, buf, count);
333 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
336 struct Scsi_Host *shost = class_to_shost(dev);
337 struct ata_port *ap = ata_shost_to_port(shost);
339 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
340 return ap->ops->em_show(ap, buf);
343 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
344 ata_scsi_em_message_show, ata_scsi_em_message_store);
345 EXPORT_SYMBOL_GPL(dev_attr_em_message);
348 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
351 struct Scsi_Host *shost = class_to_shost(dev);
352 struct ata_port *ap = ata_shost_to_port(shost);
354 return snprintf(buf, 23, "%d\n", ap->em_message_type);
356 DEVICE_ATTR(em_message_type, S_IRUGO,
357 ata_scsi_em_message_type_show, NULL);
358 EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
361 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
364 struct scsi_device *sdev = to_scsi_device(dev);
365 struct ata_port *ap = ata_shost_to_port(sdev->host);
366 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
368 if (atadev && ap->ops->sw_activity_show &&
369 (ap->flags & ATA_FLAG_SW_ACTIVITY))
370 return ap->ops->sw_activity_show(atadev, buf);
375 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
376 const char *buf, size_t count)
378 struct scsi_device *sdev = to_scsi_device(dev);
379 struct ata_port *ap = ata_shost_to_port(sdev->host);
380 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
381 enum sw_activity val;
384 if (atadev && ap->ops->sw_activity_store &&
385 (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
386 val = simple_strtoul(buf, NULL, 0);
388 case OFF: case BLINK_ON: case BLINK_OFF:
389 rc = ap->ops->sw_activity_store(atadev, val);
398 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
399 ata_scsi_activity_store);
400 EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
402 struct device_attribute *ata_common_sdev_attrs[] = {
403 &dev_attr_unload_heads,
406 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
408 static void ata_scsi_invalid_field(struct ata_device *dev,
409 struct scsi_cmnd *cmd, u16 field)
411 ata_scsi_set_invalid_field(dev, cmd, field, 0xff);
416 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
417 * @sdev: SCSI device for which BIOS geometry is to be determined
418 * @bdev: block device associated with @sdev
419 * @capacity: capacity of SCSI device
420 * @geom: location to which geometry will be output
422 * Generic bios head/sector/cylinder calculator
423 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
424 * mapping. Some situations may arise where the disk is not
425 * bootable if this is not used.
428 * Defined by the SCSI layer. We don't really care.
433 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
434 sector_t capacity, int geom[])
438 sector_div(capacity, 255*63);
445 * ata_scsi_unlock_native_capacity - unlock native capacity
446 * @sdev: SCSI device to adjust device capacity for
448 * This function is called if a partition on @sdev extends beyond
449 * the end of the device. It requests EH to unlock HPA.
452 * Defined by the SCSI layer. Might sleep.
454 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
456 struct ata_port *ap = ata_shost_to_port(sdev->host);
457 struct ata_device *dev;
460 spin_lock_irqsave(ap->lock, flags);
462 dev = ata_scsi_find_dev(ap, sdev);
463 if (dev && dev->n_sectors < dev->n_native_sectors) {
464 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
465 dev->link->eh_info.action |= ATA_EH_RESET;
466 ata_port_schedule_eh(ap);
469 spin_unlock_irqrestore(ap->lock, flags);
470 ata_port_wait_eh(ap);
474 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
476 * @sdev: SCSI device to get identify data for
477 * @arg: User buffer area for identify data
480 * Defined by the SCSI layer. We don't really care.
483 * Zero on success, negative errno on error.
485 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
488 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
489 u16 __user *dst = arg;
495 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
498 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
499 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
502 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
503 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
506 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
507 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
514 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
515 * @scsidev: Device to which we are issuing command
516 * @arg: User provided data for issuing command
519 * Defined by the SCSI layer. We don't really care.
522 * Zero on success, negative errno on error.
524 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
527 u8 scsi_cmd[MAX_COMMAND_SIZE];
528 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
530 enum dma_data_direction data_dir;
536 if (copy_from_user(args, arg, sizeof(args)))
539 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
543 memset(scsi_cmd, 0, sizeof(scsi_cmd));
546 argsize = ATA_SECT_SIZE * args[3];
547 argbuf = kmalloc(argsize, GFP_KERNEL);
548 if (argbuf == NULL) {
553 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
554 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
555 block count in sector count field */
556 data_dir = DMA_FROM_DEVICE;
558 scsi_cmd[1] = (3 << 1); /* Non-data */
559 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
563 scsi_cmd[0] = ATA_16;
565 scsi_cmd[4] = args[2];
566 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
567 scsi_cmd[6] = args[3];
568 scsi_cmd[8] = args[1];
572 scsi_cmd[6] = args[1];
574 scsi_cmd[14] = args[0];
576 /* Good values for timeout and retries? Values below
577 from scsi_ioctl_send_command() for default case... */
578 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
579 sensebuf, (10*HZ), 5, 0, NULL);
581 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
582 u8 *desc = sensebuf + 8;
583 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
585 /* If we set cc then ATA pass-through will cause a
586 * check condition even if no error. Filter that. */
587 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
588 struct scsi_sense_hdr sshdr;
589 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
591 if (sshdr.sense_key == RECOVERED_ERROR &&
592 sshdr.asc == 0 && sshdr.ascq == 0x1d)
593 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
596 /* Send userspace a few ATA registers (same as drivers/ide) */
597 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
598 desc[0] == 0x09) { /* code is "ATA Descriptor" */
599 args[0] = desc[13]; /* status */
600 args[1] = desc[3]; /* error */
601 args[2] = desc[5]; /* sector count (0:7) */
602 if (copy_to_user(arg, args, sizeof(args)))
614 && copy_to_user(arg + sizeof(args), argbuf, argsize))
623 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
624 * @scsidev: Device to which we are issuing command
625 * @arg: User provided data for issuing command
628 * Defined by the SCSI layer. We don't really care.
631 * Zero on success, negative errno on error.
633 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
636 u8 scsi_cmd[MAX_COMMAND_SIZE];
637 u8 args[7], *sensebuf = NULL;
643 if (copy_from_user(args, arg, sizeof(args)))
646 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
650 memset(scsi_cmd, 0, sizeof(scsi_cmd));
651 scsi_cmd[0] = ATA_16;
652 scsi_cmd[1] = (3 << 1); /* Non-data */
653 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
654 scsi_cmd[4] = args[1];
655 scsi_cmd[6] = args[2];
656 scsi_cmd[8] = args[3];
657 scsi_cmd[10] = args[4];
658 scsi_cmd[12] = args[5];
659 scsi_cmd[13] = args[6] & 0x4f;
660 scsi_cmd[14] = args[0];
662 /* Good values for timeout and retries? Values below
663 from scsi_ioctl_send_command() for default case... */
664 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
665 sensebuf, (10*HZ), 5, 0, NULL);
667 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
668 u8 *desc = sensebuf + 8;
669 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
671 /* If we set cc then ATA pass-through will cause a
672 * check condition even if no error. Filter that. */
673 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
674 struct scsi_sense_hdr sshdr;
675 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
677 if (sshdr.sense_key == RECOVERED_ERROR &&
678 sshdr.asc == 0 && sshdr.ascq == 0x1d)
679 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
682 /* Send userspace ATA registers */
683 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
684 desc[0] == 0x09) {/* code is "ATA Descriptor" */
685 args[0] = desc[13]; /* status */
686 args[1] = desc[3]; /* error */
687 args[2] = desc[5]; /* sector count (0:7) */
688 args[3] = desc[7]; /* lbal */
689 args[4] = desc[9]; /* lbam */
690 args[5] = desc[11]; /* lbah */
691 args[6] = desc[12]; /* select */
692 if (copy_to_user(arg, args, sizeof(args)))
707 static int ata_ioc32(struct ata_port *ap)
709 if (ap->flags & ATA_FLAG_PIO_DMA)
711 if (ap->pflags & ATA_PFLAG_PIO32)
716 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
717 int cmd, void __user *arg)
725 spin_lock_irqsave(ap->lock, flags);
727 spin_unlock_irqrestore(ap->lock, flags);
728 return put_user(val, (unsigned long __user *)arg);
731 val = (unsigned long) arg;
733 spin_lock_irqsave(ap->lock, flags);
734 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
736 ap->pflags |= ATA_PFLAG_PIO32;
738 ap->pflags &= ~ATA_PFLAG_PIO32;
740 if (val != ata_ioc32(ap))
743 spin_unlock_irqrestore(ap->lock, flags);
746 case HDIO_GET_IDENTITY:
747 return ata_get_identity(ap, scsidev, arg);
750 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
752 return ata_cmd_ioctl(scsidev, arg);
754 case HDIO_DRIVE_TASK:
755 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
757 return ata_task_ioctl(scsidev, arg);
766 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
768 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
770 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
773 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
776 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
777 * @dev: ATA device to which the new command is attached
778 * @cmd: SCSI command that originated this ATA command
780 * Obtain a reference to an unused ata_queued_cmd structure,
781 * which is the basic libata structure representing a single
782 * ATA command sent to the hardware.
784 * If a command was available, fill in the SCSI-specific
785 * portions of the structure with information on the
789 * spin_lock_irqsave(host lock)
792 * Command allocated, or %NULL if none available.
794 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
795 struct scsi_cmnd *cmd)
797 struct ata_queued_cmd *qc;
799 qc = ata_qc_new_init(dev, cmd->request->tag);
802 qc->scsidone = cmd->scsi_done;
804 qc->sg = scsi_sglist(cmd);
805 qc->n_elem = scsi_sg_count(cmd);
807 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
814 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
816 struct scsi_cmnd *scmd = qc->scsicmd;
818 qc->extrabytes = scmd->request->extra_len;
819 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
823 * ata_dump_status - user friendly display of error info
824 * @id: id of the port in question
825 * @tf: ptr to filled out taskfile
827 * Decode and dump the ATA error/status registers for the user so
828 * that they have some idea what really happened at the non
829 * make-believe layer.
832 * inherited from caller
834 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
836 u8 stat = tf->command, err = tf->feature;
838 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
839 if (stat & ATA_BUSY) {
840 printk("Busy }\n"); /* Data is not valid in this case */
842 if (stat & ATA_DRDY) printk("DriveReady ");
843 if (stat & ATA_DF) printk("DeviceFault ");
844 if (stat & ATA_DSC) printk("SeekComplete ");
845 if (stat & ATA_DRQ) printk("DataRequest ");
846 if (stat & ATA_CORR) printk("CorrectedError ");
847 if (stat & ATA_SENSE) printk("Sense ");
848 if (stat & ATA_ERR) printk("Error ");
852 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
853 if (err & ATA_ABORTED) printk("DriveStatusError ");
854 if (err & ATA_ICRC) {
855 if (err & ATA_ABORTED)
857 else printk("Sector ");
859 if (err & ATA_UNC) printk("UncorrectableError ");
860 if (err & ATA_IDNF) printk("SectorIdNotFound ");
861 if (err & ATA_TRK0NF) printk("TrackZeroNotFound ");
862 if (err & ATA_AMNF) printk("AddrMarkNotFound ");
869 * ata_to_sense_error - convert ATA error to SCSI error
870 * @id: ATA device number
871 * @drv_stat: value contained in ATA status register
872 * @drv_err: value contained in ATA error register
873 * @sk: the sense key we'll fill out
874 * @asc: the additional sense code we'll fill out
875 * @ascq: the additional sense code qualifier we'll fill out
876 * @verbose: be verbose
878 * Converts an ATA error into a SCSI error. Fill out pointers to
879 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
880 * format sense blocks.
883 * spin_lock_irqsave(host lock)
885 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
886 u8 *asc, u8 *ascq, int verbose)
890 /* Based on the 3ware driver translation table */
891 static const unsigned char sense_table[][4] = {
893 {0xd1, ABORTED_COMMAND, 0x00, 0x00},
894 // Device busy Aborted command
896 {0xd0, ABORTED_COMMAND, 0x00, 0x00},
897 // Device busy Aborted command
899 {0x61, HARDWARE_ERROR, 0x00, 0x00},
900 // Device fault Hardware error
901 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
902 {0x84, ABORTED_COMMAND, 0x47, 0x00},
903 // Data CRC error SCSI parity error
904 /* MC|ID|ABRT|TRK0|MARK */
905 {0x37, NOT_READY, 0x04, 0x00},
906 // Unit offline Not ready
908 {0x09, NOT_READY, 0x04, 0x00},
909 // Unrecovered disk error Not ready
910 /* Bad address mark */
911 {0x01, MEDIUM_ERROR, 0x13, 0x00},
912 // Address mark not found for data field
913 /* TRK0 - Track 0 not found */
914 {0x02, HARDWARE_ERROR, 0x00, 0x00},
916 /* Abort: 0x04 is not translated here, see below */
917 /* Media change request */
918 {0x08, NOT_READY, 0x04, 0x00},
919 // FIXME: faking offline
920 /* SRV/IDNF - ID not found */
921 {0x10, ILLEGAL_REQUEST, 0x21, 0x00},
922 // Logical address out of range
923 /* MC - Media Changed */
924 {0x20, UNIT_ATTENTION, 0x28, 0x00},
925 // Not ready to ready change, medium may have changed
926 /* ECC - Uncorrectable ECC error */
927 {0x40, MEDIUM_ERROR, 0x11, 0x04},
928 // Unrecovered read error
929 /* BBD - block marked bad */
930 {0x80, MEDIUM_ERROR, 0x11, 0x04},
931 // Block marked bad Medium error, unrecovered read error
932 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
934 static const unsigned char stat_table[][4] = {
935 /* Must be first because BUSY means no other bits valid */
936 {0x80, ABORTED_COMMAND, 0x47, 0x00},
937 // Busy, fake parity for now
938 {0x40, ILLEGAL_REQUEST, 0x21, 0x04},
939 // Device ready, unaligned write command
940 {0x20, HARDWARE_ERROR, 0x44, 0x00},
941 // Device fault, internal target failure
942 {0x08, ABORTED_COMMAND, 0x47, 0x00},
943 // Timed out in xfer, fake parity for now
944 {0x04, RECOVERED_ERROR, 0x11, 0x00},
945 // Recovered ECC error Medium error, recovered
946 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
950 * Is this an error we can process/parse
952 if (drv_stat & ATA_BUSY) {
953 drv_err = 0; /* Ignore the err bits, they're invalid */
957 /* Look for drv_err */
958 for (i = 0; sense_table[i][0] != 0xFF; i++) {
959 /* Look for best matches first */
960 if ((sense_table[i][0] & drv_err) ==
962 *sk = sense_table[i][1];
963 *asc = sense_table[i][2];
964 *ascq = sense_table[i][3];
971 * Fall back to interpreting status bits. Note that if the drv_err
972 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
973 * is not descriptive enough.
975 for (i = 0; stat_table[i][0] != 0xFF; i++) {
976 if (stat_table[i][0] & drv_stat) {
977 *sk = stat_table[i][1];
978 *asc = stat_table[i][2];
979 *ascq = stat_table[i][3];
985 * We need a sensible error return here, which is tricky, and one
986 * that won't cause people to do things like return a disk wrongly.
988 *sk = ABORTED_COMMAND;
994 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
995 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
996 id, drv_stat, drv_err, *sk, *asc, *ascq);
1001 * ata_gen_passthru_sense - Generate check condition sense block.
1002 * @qc: Command that completed.
1004 * This function is specific to the ATA descriptor format sense
1005 * block specified for the ATA pass through commands. Regardless
1006 * of whether the command errored or not, return a sense
1007 * block. Copy all controller registers into the sense
1008 * block. If there was no error, we get the request from an ATA
1009 * passthrough command, so we use the following sense data:
1010 * sk = RECOVERED ERROR
1011 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1017 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
1019 struct scsi_cmnd *cmd = qc->scsicmd;
1020 struct ata_taskfile *tf = &qc->result_tf;
1021 unsigned char *sb = cmd->sense_buffer;
1022 unsigned char *desc = sb + 8;
1023 int verbose = qc->ap->ops->error_handler == NULL;
1024 u8 sense_key, asc, ascq;
1026 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1028 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1031 * Use ata_to_sense_error() to map status register bits
1032 * onto sense key, asc & ascq.
1035 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1036 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1037 &sense_key, &asc, &ascq, verbose);
1038 ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq);
1041 * ATA PASS-THROUGH INFORMATION AVAILABLE
1042 * Always in descriptor format sense.
1044 scsi_build_sense_buffer(1, cmd->sense_buffer,
1045 RECOVERED_ERROR, 0, 0x1D);
1048 if ((cmd->sense_buffer[0] & 0x7f) >= 0x72) {
1051 /* descriptor format */
1053 desc = (char *)scsi_sense_desc_find(sb, len + 8, 9);
1055 if (SCSI_SENSE_BUFFERSIZE < len + 14)
1058 desc = sb + 8 + len;
1063 * Copy registers into sense buffer.
1066 desc[3] = tf->feature; /* == error reg */
1067 desc[5] = tf->nsect;
1070 desc[11] = tf->lbah;
1071 desc[12] = tf->device;
1072 desc[13] = tf->command; /* == status reg */
1075 * Fill in Extend bit, and the high order bytes
1078 if (tf->flags & ATA_TFLAG_LBA48) {
1080 desc[4] = tf->hob_nsect;
1081 desc[6] = tf->hob_lbal;
1082 desc[8] = tf->hob_lbam;
1083 desc[10] = tf->hob_lbah;
1086 /* Fixed sense format */
1087 desc[0] = tf->feature;
1088 desc[1] = tf->command; /* status */
1089 desc[2] = tf->device;
1090 desc[3] = tf->nsect;
1092 if (tf->flags & ATA_TFLAG_LBA48) {
1096 if (tf->hob_lbal || tf->hob_lbam || tf->hob_lbah)
1100 desc[10] = tf->lbam;
1101 desc[11] = tf->lbah;
1106 * ata_gen_ata_sense - generate a SCSI fixed sense block
1107 * @qc: Command that we are erroring out
1109 * Generate sense block for a failed ATA command @qc. Descriptor
1110 * format is used to accommodate LBA48 block address.
1115 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1117 struct ata_device *dev = qc->dev;
1118 struct scsi_cmnd *cmd = qc->scsicmd;
1119 struct ata_taskfile *tf = &qc->result_tf;
1120 unsigned char *sb = cmd->sense_buffer;
1121 int verbose = qc->ap->ops->error_handler == NULL;
1123 u8 sense_key, asc, ascq;
1125 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1127 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1129 if (ata_dev_disabled(dev)) {
1130 /* Device disabled after error recovery */
1131 /* LOGICAL UNIT NOT READY, HARD RESET REQUIRED */
1132 ata_scsi_set_sense(dev, cmd, NOT_READY, 0x04, 0x21);
1135 /* Use ata_to_sense_error() to map status register bits
1136 * onto sense key, asc & ascq.
1139 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1140 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1141 &sense_key, &asc, &ascq, verbose);
1142 ata_scsi_set_sense(dev, cmd, sense_key, asc, ascq);
1144 /* Could not decode error */
1145 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n",
1146 tf->command, qc->err_mask);
1147 ata_scsi_set_sense(dev, cmd, ABORTED_COMMAND, 0, 0);
1151 block = ata_tf_read_block(&qc->result_tf, dev);
1152 if (block == U64_MAX)
1155 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block);
1158 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1160 sdev->use_10_for_rw = 1;
1161 sdev->use_10_for_ms = 1;
1163 /* Schedule policy is determined by ->qc_defer() callback and
1164 * it needs to see every deferred qc. Set dev_blocked to 1 to
1165 * prevent SCSI midlayer from automatically deferring
1168 sdev->max_device_blocked = 1;
1172 * atapi_drain_needed - Check whether data transfer may overflow
1173 * @rq: request to be checked
1175 * ATAPI commands which transfer variable length data to host
1176 * might overflow due to application error or hardware bug. This
1177 * function checks whether overflow should be drained and ignored
1184 * 1 if ; otherwise, 0.
1186 static int atapi_drain_needed(struct request *rq)
1188 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
1191 if (!blk_rq_bytes(rq) || op_is_write(req_op(rq)))
1194 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1197 static int ata_scsi_dev_config(struct scsi_device *sdev,
1198 struct ata_device *dev)
1200 struct request_queue *q = sdev->request_queue;
1202 if (!ata_id_has_unload(dev->id))
1203 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1205 /* configure max sectors */
1206 blk_queue_max_hw_sectors(q, dev->max_sectors);
1208 if (dev->class == ATA_DEV_ATAPI) {
1211 sdev->sector_size = ATA_SECT_SIZE;
1213 /* set DMA padding */
1214 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1216 /* configure draining */
1217 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1219 ata_dev_err(dev, "drain buffer allocation failed\n");
1223 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1225 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1226 sdev->manage_start_stop = 1;
1230 * ata_pio_sectors() expects buffer for each sector to not cross
1231 * page boundary. Enforce it by requiring buffers to be sector
1232 * aligned, which works iff sector_size is not larger than
1233 * PAGE_SIZE. ATAPI devices also need the alignment as
1234 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1236 if (sdev->sector_size > PAGE_SIZE)
1238 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1241 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1243 if (dev->flags & ATA_DFLAG_AN)
1244 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1246 if (dev->flags & ATA_DFLAG_NCQ) {
1249 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1250 depth = min(ATA_MAX_QUEUE - 1, depth);
1251 scsi_change_queue_depth(sdev, depth);
1254 blk_queue_flush_queueable(q, false);
1261 * ata_scsi_slave_config - Set SCSI device attributes
1262 * @sdev: SCSI device to examine
1264 * This is called before we actually start reading
1265 * and writing to the device, to configure certain
1266 * SCSI mid-layer behaviors.
1269 * Defined by SCSI layer. We don't really care.
1272 int ata_scsi_slave_config(struct scsi_device *sdev)
1274 struct ata_port *ap = ata_shost_to_port(sdev->host);
1275 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1278 ata_scsi_sdev_config(sdev);
1281 rc = ata_scsi_dev_config(sdev, dev);
1287 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1288 * @sdev: SCSI device to be destroyed
1290 * @sdev is about to be destroyed for hot/warm unplugging. If
1291 * this unplugging was initiated by libata as indicated by NULL
1292 * dev->sdev, this function doesn't have to do anything.
1293 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1294 * Clear dev->sdev, schedule the device for ATA detach and invoke
1298 * Defined by SCSI layer. We don't really care.
1300 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1302 struct ata_port *ap = ata_shost_to_port(sdev->host);
1303 struct request_queue *q = sdev->request_queue;
1304 unsigned long flags;
1305 struct ata_device *dev;
1307 if (!ap->ops->error_handler)
1310 spin_lock_irqsave(ap->lock, flags);
1311 dev = __ata_scsi_find_dev(ap, sdev);
1312 if (dev && dev->sdev) {
1313 /* SCSI device already in CANCEL state, no need to offline it */
1315 dev->flags |= ATA_DFLAG_DETACH;
1316 ata_port_schedule_eh(ap);
1318 spin_unlock_irqrestore(ap->lock, flags);
1320 kfree(q->dma_drain_buffer);
1321 q->dma_drain_buffer = NULL;
1322 q->dma_drain_size = 0;
1326 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1327 * @ap: ATA port to which the device change the queue depth
1328 * @sdev: SCSI device to configure queue depth for
1329 * @queue_depth: new queue depth
1331 * libsas and libata have different approaches for associating a sdev to
1335 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1338 struct ata_device *dev;
1339 unsigned long flags;
1341 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1342 return sdev->queue_depth;
1344 dev = ata_scsi_find_dev(ap, sdev);
1345 if (!dev || !ata_dev_enabled(dev))
1346 return sdev->queue_depth;
1349 spin_lock_irqsave(ap->lock, flags);
1350 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1351 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1352 dev->flags |= ATA_DFLAG_NCQ_OFF;
1355 spin_unlock_irqrestore(ap->lock, flags);
1357 /* limit and apply queue depth */
1358 queue_depth = min(queue_depth, sdev->host->can_queue);
1359 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1360 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1362 if (sdev->queue_depth == queue_depth)
1365 return scsi_change_queue_depth(sdev, queue_depth);
1369 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1370 * @sdev: SCSI device to configure queue depth for
1371 * @queue_depth: new queue depth
1373 * This is libata standard hostt->change_queue_depth callback.
1374 * SCSI will call into this callback when user tries to set queue
1378 * SCSI layer (we don't care)
1381 * Newly configured queue depth.
1383 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1385 struct ata_port *ap = ata_shost_to_port(sdev->host);
1387 return __ata_change_queue_depth(ap, sdev, queue_depth);
1391 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1392 * @qc: Storage for translated ATA taskfile
1394 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1395 * (to start). Perhaps these commands should be preceded by
1396 * CHECK POWER MODE to see what power mode the device is already in.
1397 * [See SAT revision 5 at www.t10.org]
1400 * spin_lock_irqsave(host lock)
1403 * Zero on success, non-zero on error.
1405 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1407 struct scsi_cmnd *scmd = qc->scsicmd;
1408 struct ata_taskfile *tf = &qc->tf;
1409 const u8 *cdb = scmd->cmnd;
1413 if (scmd->cmd_len < 5) {
1418 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1419 tf->protocol = ATA_PROT_NODATA;
1421 ; /* ignore IMMED bit, violates sat-r05 */
1426 goto invalid_fld; /* LOEJ bit set not supported */
1428 if (((cdb[4] >> 4) & 0xf) != 0) {
1431 goto invalid_fld; /* power conditions not supported */
1435 tf->nsect = 1; /* 1 sector, lba=0 */
1437 if (qc->dev->flags & ATA_DFLAG_LBA) {
1438 tf->flags |= ATA_TFLAG_LBA;
1443 tf->device |= ATA_LBA;
1446 tf->lbal = 0x1; /* sect */
1447 tf->lbam = 0x0; /* cyl low */
1448 tf->lbah = 0x0; /* cyl high */
1451 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1453 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1454 * or S5) causing some drives to spin up and down again.
1456 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1457 system_state == SYSTEM_POWER_OFF)
1460 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1461 system_entering_hibernation())
1464 /* Issue ATA STANDBY IMMEDIATE command */
1465 tf->command = ATA_CMD_STANDBYNOW1;
1469 * Standby and Idle condition timers could be implemented but that
1470 * would require libata to implement the Power condition mode page
1471 * and allow the user to change it. Changing mode pages requires
1472 * MODE SELECT to be implemented.
1478 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
1481 scmd->result = SAM_STAT_GOOD;
1487 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1488 * @qc: Storage for translated ATA taskfile
1490 * Sets up an ATA taskfile to issue FLUSH CACHE or
1494 * spin_lock_irqsave(host lock)
1497 * Zero on success, non-zero on error.
1499 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1501 struct ata_taskfile *tf = &qc->tf;
1503 tf->flags |= ATA_TFLAG_DEVICE;
1504 tf->protocol = ATA_PROT_NODATA;
1506 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1507 tf->command = ATA_CMD_FLUSH_EXT;
1509 tf->command = ATA_CMD_FLUSH;
1511 /* flush is critical for IO integrity, consider it an IO command */
1512 qc->flags |= ATA_QCFLAG_IO;
1518 * scsi_6_lba_len - Get LBA and transfer length
1519 * @cdb: SCSI command to translate
1521 * Calculate LBA and transfer length for 6-byte commands.
1525 * @plen: the transfer length
1527 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1532 VPRINTK("six-byte command\n");
1534 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1535 lba |= ((u64)cdb[2]) << 8;
1536 lba |= ((u64)cdb[3]);
1545 * scsi_10_lba_len - Get LBA and transfer length
1546 * @cdb: SCSI command to translate
1548 * Calculate LBA and transfer length for 10-byte commands.
1552 * @plen: the transfer length
1554 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1559 VPRINTK("ten-byte command\n");
1561 lba |= ((u64)cdb[2]) << 24;
1562 lba |= ((u64)cdb[3]) << 16;
1563 lba |= ((u64)cdb[4]) << 8;
1564 lba |= ((u64)cdb[5]);
1566 len |= ((u32)cdb[7]) << 8;
1567 len |= ((u32)cdb[8]);
1574 * scsi_16_lba_len - Get LBA and transfer length
1575 * @cdb: SCSI command to translate
1577 * Calculate LBA and transfer length for 16-byte commands.
1581 * @plen: the transfer length
1583 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1588 VPRINTK("sixteen-byte command\n");
1590 lba |= ((u64)cdb[2]) << 56;
1591 lba |= ((u64)cdb[3]) << 48;
1592 lba |= ((u64)cdb[4]) << 40;
1593 lba |= ((u64)cdb[5]) << 32;
1594 lba |= ((u64)cdb[6]) << 24;
1595 lba |= ((u64)cdb[7]) << 16;
1596 lba |= ((u64)cdb[8]) << 8;
1597 lba |= ((u64)cdb[9]);
1599 len |= ((u32)cdb[10]) << 24;
1600 len |= ((u32)cdb[11]) << 16;
1601 len |= ((u32)cdb[12]) << 8;
1602 len |= ((u32)cdb[13]);
1609 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1610 * @qc: Storage for translated ATA taskfile
1612 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1615 * spin_lock_irqsave(host lock)
1618 * Zero on success, non-zero on error.
1620 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1622 struct scsi_cmnd *scmd = qc->scsicmd;
1623 struct ata_taskfile *tf = &qc->tf;
1624 struct ata_device *dev = qc->dev;
1625 u64 dev_sectors = qc->dev->n_sectors;
1626 const u8 *cdb = scmd->cmnd;
1631 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1632 tf->protocol = ATA_PROT_NODATA;
1634 if (cdb[0] == VERIFY) {
1635 if (scmd->cmd_len < 10) {
1639 scsi_10_lba_len(cdb, &block, &n_block);
1640 } else if (cdb[0] == VERIFY_16) {
1641 if (scmd->cmd_len < 16) {
1645 scsi_16_lba_len(cdb, &block, &n_block);
1653 if (block >= dev_sectors)
1655 if ((block + n_block) > dev_sectors)
1658 if (dev->flags & ATA_DFLAG_LBA) {
1659 tf->flags |= ATA_TFLAG_LBA;
1661 if (lba_28_ok(block, n_block)) {
1663 tf->command = ATA_CMD_VERIFY;
1664 tf->device |= (block >> 24) & 0xf;
1665 } else if (lba_48_ok(block, n_block)) {
1666 if (!(dev->flags & ATA_DFLAG_LBA48))
1670 tf->flags |= ATA_TFLAG_LBA48;
1671 tf->command = ATA_CMD_VERIFY_EXT;
1673 tf->hob_nsect = (n_block >> 8) & 0xff;
1675 tf->hob_lbah = (block >> 40) & 0xff;
1676 tf->hob_lbam = (block >> 32) & 0xff;
1677 tf->hob_lbal = (block >> 24) & 0xff;
1679 /* request too large even for LBA48 */
1682 tf->nsect = n_block & 0xff;
1684 tf->lbah = (block >> 16) & 0xff;
1685 tf->lbam = (block >> 8) & 0xff;
1686 tf->lbal = block & 0xff;
1688 tf->device |= ATA_LBA;
1691 u32 sect, head, cyl, track;
1693 if (!lba_28_ok(block, n_block))
1696 /* Convert LBA to CHS */
1697 track = (u32)block / dev->sectors;
1698 cyl = track / dev->heads;
1699 head = track % dev->heads;
1700 sect = (u32)block % dev->sectors + 1;
1702 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1703 (u32)block, track, cyl, head, sect);
1705 /* Check whether the converted CHS can fit.
1709 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1712 tf->command = ATA_CMD_VERIFY;
1713 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1716 tf->lbah = cyl >> 8;
1723 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1727 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1728 /* "Logical Block Address out of range" */
1732 scmd->result = SAM_STAT_GOOD;
1737 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1738 * @qc: Storage for translated ATA taskfile
1740 * Converts any of six SCSI read/write commands into the
1741 * ATA counterpart, including starting sector (LBA),
1742 * sector count, and taking into account the device's LBA48
1745 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1746 * %WRITE_16 are currently supported.
1749 * spin_lock_irqsave(host lock)
1752 * Zero on success, non-zero on error.
1754 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1756 struct scsi_cmnd *scmd = qc->scsicmd;
1757 const u8 *cdb = scmd->cmnd;
1758 unsigned int tf_flags = 0;
1764 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1765 tf_flags |= ATA_TFLAG_WRITE;
1767 /* Calculate the SCSI LBA, transfer length and FUA. */
1771 if (unlikely(scmd->cmd_len < 10)) {
1775 scsi_10_lba_len(cdb, &block, &n_block);
1776 if (cdb[1] & (1 << 3))
1777 tf_flags |= ATA_TFLAG_FUA;
1781 if (unlikely(scmd->cmd_len < 6)) {
1785 scsi_6_lba_len(cdb, &block, &n_block);
1787 /* for 6-byte r/w commands, transfer length 0
1788 * means 256 blocks of data, not 0 block.
1795 if (unlikely(scmd->cmd_len < 16)) {
1799 scsi_16_lba_len(cdb, &block, &n_block);
1800 if (cdb[1] & (1 << 3))
1801 tf_flags |= ATA_TFLAG_FUA;
1804 DPRINTK("no-byte command\n");
1809 /* Check and compose ATA command */
1811 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1812 * length 0 means transfer 0 block of data.
1813 * However, for ATA R/W commands, sector count 0 means
1814 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1816 * WARNING: one or two older ATA drives treat 0 as 0...
1820 qc->flags |= ATA_QCFLAG_IO;
1821 qc->nbytes = n_block * scmd->device->sector_size;
1823 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1825 if (likely(rc == 0))
1830 /* treat all other errors as -EINVAL, fall through */
1832 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
1836 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1837 /* "Logical Block Address out of range" */
1841 scmd->result = SAM_STAT_GOOD;
1845 static void ata_qc_done(struct ata_queued_cmd *qc)
1847 struct scsi_cmnd *cmd = qc->scsicmd;
1848 void (*done)(struct scsi_cmnd *) = qc->scsidone;
1854 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1856 struct ata_port *ap = qc->ap;
1857 struct scsi_cmnd *cmd = qc->scsicmd;
1858 u8 *cdb = cmd->cmnd;
1859 int need_sense = (qc->err_mask != 0);
1861 /* For ATA pass thru (SAT) commands, generate a sense block if
1862 * user mandated it or if there's an error. Note that if we
1863 * generate because the user forced us to [CK_COND =1], a check
1864 * condition is generated and the ATA register values are returned
1865 * whether the command completed successfully or not. If there
1866 * was no error, we use the following sense data:
1867 * sk = RECOVERED ERROR
1868 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1870 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1871 ((cdb[2] & 0x20) || need_sense))
1872 ata_gen_passthru_sense(qc);
1873 else if (qc->flags & ATA_QCFLAG_SENSE_VALID)
1874 cmd->result = SAM_STAT_CHECK_CONDITION;
1875 else if (need_sense)
1876 ata_gen_ata_sense(qc);
1878 cmd->result = SAM_STAT_GOOD;
1880 if (need_sense && !ap->ops->error_handler)
1881 ata_dump_status(ap->print_id, &qc->result_tf);
1887 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1888 * @dev: ATA device to which the command is addressed
1889 * @cmd: SCSI command to execute
1890 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1892 * Our ->queuecommand() function has decided that the SCSI
1893 * command issued can be directly translated into an ATA
1894 * command, rather than handled internally.
1896 * This function sets up an ata_queued_cmd structure for the
1897 * SCSI command, and sends that ata_queued_cmd to the hardware.
1899 * The xlat_func argument (actor) returns 0 if ready to execute
1900 * ATA command, else 1 to finish translation. If 1 is returned
1901 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1902 * to be set reflecting an error condition or clean (early)
1906 * spin_lock_irqsave(host lock)
1909 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1910 * needs to be deferred.
1912 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1913 ata_xlat_func_t xlat_func)
1915 struct ata_port *ap = dev->link->ap;
1916 struct ata_queued_cmd *qc;
1921 qc = ata_scsi_qc_new(dev, cmd);
1925 /* data is present; dma-map it */
1926 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1927 cmd->sc_data_direction == DMA_TO_DEVICE) {
1928 if (unlikely(scsi_bufflen(cmd) < 1)) {
1929 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
1933 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1935 qc->dma_dir = cmd->sc_data_direction;
1938 qc->complete_fn = ata_scsi_qc_complete;
1943 if (ap->ops->qc_defer) {
1944 if ((rc = ap->ops->qc_defer(qc)))
1948 /* select device, send command to hardware */
1956 cmd->scsi_done(cmd);
1957 DPRINTK("EXIT - early finish (good or error)\n");
1962 cmd->result = (DID_ERROR << 16);
1963 cmd->scsi_done(cmd);
1965 DPRINTK("EXIT - internal\n");
1970 DPRINTK("EXIT - defer\n");
1971 if (rc == ATA_DEFER_LINK)
1972 return SCSI_MLQUEUE_DEVICE_BUSY;
1974 return SCSI_MLQUEUE_HOST_BUSY;
1978 * ata_scsi_rbuf_get - Map response buffer.
1979 * @cmd: SCSI command containing buffer to be mapped.
1980 * @flags: unsigned long variable to store irq enable status
1981 * @copy_in: copy in from user buffer
1983 * Prepare buffer for simulated SCSI commands.
1986 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1989 * Pointer to response buffer.
1991 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1992 unsigned long *flags)
1994 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1996 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1998 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1999 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2000 return ata_scsi_rbuf;
2004 * ata_scsi_rbuf_put - Unmap response buffer.
2005 * @cmd: SCSI command containing buffer to be unmapped.
2006 * @copy_out: copy out result
2007 * @flags: @flags passed to ata_scsi_rbuf_get()
2009 * Returns rbuf buffer. The result is copied to @cmd's buffer if
2010 * @copy_back is true.
2013 * Unlocks ata_scsi_rbuf_lock.
2015 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
2016 unsigned long *flags)
2019 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
2020 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
2021 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
2025 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
2026 * @args: device IDENTIFY data / SCSI command of interest.
2027 * @actor: Callback hook for desired SCSI command simulator
2029 * Takes care of the hard work of simulating a SCSI command...
2030 * Mapping the response buffer, calling the command's handler,
2031 * and handling the handler's return value. This return value
2032 * indicates whether the handler wishes the SCSI command to be
2033 * completed successfully (0), or not (in which case cmd->result
2034 * and sense buffer are assumed to be set).
2037 * spin_lock_irqsave(host lock)
2039 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
2040 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
2044 struct scsi_cmnd *cmd = args->cmd;
2045 unsigned long flags;
2047 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
2048 rc = actor(args, rbuf);
2049 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
2052 cmd->result = SAM_STAT_GOOD;
2057 * ata_scsiop_inq_std - Simulate INQUIRY command
2058 * @args: device IDENTIFY data / SCSI command of interest.
2059 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2061 * Returns standard device identification data associated
2062 * with non-VPD INQUIRY command output.
2065 * spin_lock_irqsave(host lock)
2067 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
2069 const u8 versions[] = {
2071 0x60, /* SAM-3 (no version claimed) */
2074 0x20, /* SBC-2 (no version claimed) */
2077 0x00 /* SPC-3 (no version claimed) */
2079 const u8 versions_zbc[] = {
2081 0xA0, /* SAM-5 (no version claimed) */
2084 0x00, /* SBC-4 (no version claimed) */
2087 0xC0, /* SPC-5 (no version claimed) */
2096 0x5, /* claim SPC-3 version compatibility */
2106 /* set scsi removable (RMB) bit per ata bit, or if the
2107 * AHCI port says it's external (Hotplug-capable, eSATA).
2109 if (ata_id_removable(args->id) ||
2110 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL))
2113 if (args->dev->class == ATA_DEV_ZAC) {
2115 hdr[2] = 0x7; /* claim SPC-5 version compatibility */
2118 memcpy(rbuf, hdr, sizeof(hdr));
2119 memcpy(&rbuf[8], "ATA ", 8);
2120 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
2122 /* From SAT, use last 2 words from fw rev unless they are spaces */
2123 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
2124 if (strncmp(&rbuf[32], " ", 4) == 0)
2125 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2127 if (rbuf[32] == 0 || rbuf[32] == ' ')
2128 memcpy(&rbuf[32], "n/a ", 4);
2130 if (ata_id_zoned_cap(args->id) || args->dev->class == ATA_DEV_ZAC)
2131 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc));
2133 memcpy(rbuf + 58, versions, sizeof(versions));
2139 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2140 * @args: device IDENTIFY data / SCSI command of interest.
2141 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2143 * Returns list of inquiry VPD pages available.
2146 * spin_lock_irqsave(host lock)
2148 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
2151 const u8 pages[] = {
2152 0x00, /* page 0x00, this page */
2153 0x80, /* page 0x80, unit serial no page */
2154 0x83, /* page 0x83, device ident page */
2155 0x89, /* page 0x89, ata info page */
2156 0xb0, /* page 0xb0, block limits page */
2157 0xb1, /* page 0xb1, block device characteristics page */
2158 0xb2, /* page 0xb2, thin provisioning page */
2159 0xb6, /* page 0xb6, zoned block device characteristics */
2162 num_pages = sizeof(pages);
2163 if (!(args->dev->flags & ATA_DFLAG_ZAC))
2165 rbuf[3] = num_pages; /* number of supported VPD pages */
2166 memcpy(rbuf + 4, pages, num_pages);
2171 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2172 * @args: device IDENTIFY data / SCSI command of interest.
2173 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2175 * Returns ATA device serial number.
2178 * spin_lock_irqsave(host lock)
2180 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2184 0x80, /* this page code */
2186 ATA_ID_SERNO_LEN, /* page len */
2189 memcpy(rbuf, hdr, sizeof(hdr));
2190 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2191 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2196 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2197 * @args: device IDENTIFY data / SCSI command of interest.
2198 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2200 * Yields two logical unit device identification designators:
2201 * - vendor specific ASCII containing the ATA serial number
2202 * - SAT defined "t10 vendor id based" containing ASCII vendor
2203 * name ("ATA "), model and serial numbers.
2206 * spin_lock_irqsave(host lock)
2208 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2210 const int sat_model_serial_desc_len = 68;
2213 rbuf[1] = 0x83; /* this page code */
2216 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2218 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2220 ata_id_string(args->id, (unsigned char *) rbuf + num,
2221 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2222 num += ATA_ID_SERNO_LEN;
2224 /* SAT defined lu model and serial numbers descriptor */
2225 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2228 rbuf[num + 3] = sat_model_serial_desc_len;
2230 memcpy(rbuf + num, "ATA ", 8);
2232 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2234 num += ATA_ID_PROD_LEN;
2235 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2237 num += ATA_ID_SERNO_LEN;
2239 if (ata_id_has_wwn(args->id)) {
2240 /* SAT defined lu world wide name */
2241 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2244 rbuf[num + 3] = ATA_ID_WWN_LEN;
2246 ata_id_string(args->id, (unsigned char *) rbuf + num,
2247 ATA_ID_WWN, ATA_ID_WWN_LEN);
2248 num += ATA_ID_WWN_LEN;
2250 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2255 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2256 * @args: device IDENTIFY data / SCSI command of interest.
2257 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2259 * Yields SAT-specified ATA VPD page.
2262 * spin_lock_irqsave(host lock)
2264 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2266 struct ata_taskfile tf;
2268 memset(&tf, 0, sizeof(tf));
2270 rbuf[1] = 0x89; /* our page code */
2271 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2272 rbuf[3] = (0x238 & 0xff);
2274 memcpy(&rbuf[8], "linux ", 8);
2275 memcpy(&rbuf[16], "libata ", 16);
2276 memcpy(&rbuf[32], DRV_VERSION, 4);
2278 /* we don't store the ATA device signature, so we fake it */
2280 tf.command = ATA_DRDY; /* really, this is Status reg */
2284 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2285 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2287 rbuf[56] = ATA_CMD_ID_ATA;
2289 memcpy(&rbuf[60], &args->id[0], 512);
2293 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2298 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2301 * Optimal transfer length granularity.
2303 * This is always one physical block, but for disks with a smaller
2304 * logical than physical sector size we need to figure out what the
2307 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2308 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2311 * Optimal unmap granularity.
2313 * The ATA spec doesn't even know about a granularity or alignment
2314 * for the TRIM command. We can leave away most of the unmap related
2315 * VPD page entries, but we have specifify a granularity to signal
2316 * that we support some form of unmap - in thise case via WRITE SAME
2317 * with the unmap bit set.
2319 if (ata_id_has_trim(args->id)) {
2320 put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]);
2321 put_unaligned_be32(1, &rbuf[28]);
2327 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2329 int form_factor = ata_id_form_factor(args->id);
2330 int media_rotation_rate = ata_id_rotation_rate(args->id);
2331 u8 zoned = ata_id_zoned_cap(args->id);
2335 rbuf[4] = media_rotation_rate >> 8;
2336 rbuf[5] = media_rotation_rate;
2337 rbuf[7] = form_factor;
2339 rbuf[8] = (zoned << 4);
2344 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2346 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2349 rbuf[5] = 1 << 6; /* TPWS */
2354 static unsigned int ata_scsiop_inq_b6(struct ata_scsi_args *args, u8 *rbuf)
2357 * zbc-r05 SCSI Zoned Block device characteristics VPD page
2363 * URSWRZ bit is only meaningful for host-managed ZAC drives
2365 if (args->dev->zac_zoned_cap & 1)
2367 put_unaligned_be32(args->dev->zac_zones_optimal_open, &rbuf[8]);
2368 put_unaligned_be32(args->dev->zac_zones_optimal_nonseq, &rbuf[12]);
2369 put_unaligned_be32(args->dev->zac_zones_max_open, &rbuf[16]);
2375 * ata_scsiop_noop - Command handler that simply returns success.
2376 * @args: device IDENTIFY data / SCSI command of interest.
2377 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2379 * No operation. Simply returns success to caller, to indicate
2380 * that the caller should successfully complete this SCSI command.
2383 * spin_lock_irqsave(host lock)
2385 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
2392 * modecpy - Prepare response for MODE SENSE
2393 * @dest: output buffer
2394 * @src: data being copied
2395 * @n: length of mode page
2396 * @changeable: whether changeable parameters are requested
2398 * Generate a generic MODE SENSE page for either current or changeable
2404 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2407 memcpy(dest, src, 2);
2408 memset(dest + 2, 0, n - 2);
2410 memcpy(dest, src, n);
2415 * ata_msense_caching - Simulate MODE SENSE caching info page
2416 * @id: device IDENTIFY data
2417 * @buf: output buffer
2418 * @changeable: whether changeable parameters are requested
2420 * Generate a caching info page, which conditionally indicates
2421 * write caching to the SCSI layer, depending on device
2427 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2429 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2431 buf[2] |= (1 << 2); /* ata_mselect_caching() */
2433 buf[2] |= (ata_id_wcache_enabled(id) << 2); /* write cache enable */
2434 buf[12] |= (!ata_id_rahead_enabled(id) << 5); /* disable read ahead */
2436 return sizeof(def_cache_mpage);
2440 * ata_msense_control - Simulate MODE SENSE control mode page
2441 * @dev: ATA device of interest
2442 * @buf: output buffer
2443 * @changeable: whether changeable parameters are requested
2445 * Generate a generic MODE SENSE control mode page.
2450 static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf,
2453 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2455 buf[2] |= (1 << 2); /* ata_mselect_control() */
2457 bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE);
2459 buf[2] |= (d_sense << 2); /* descriptor format sense data */
2461 return sizeof(def_control_mpage);
2465 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2466 * @buf: output buffer
2467 * @changeable: whether changeable parameters are requested
2469 * Generate a generic MODE SENSE r/w error recovery page.
2474 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2476 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2478 return sizeof(def_rw_recovery_mpage);
2482 * We can turn this into a real blacklist if it's needed, for now just
2483 * blacklist any Maxtor BANC1G10 revision firmware
2485 static int ata_dev_supports_fua(u16 *id)
2487 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2491 if (!ata_id_has_fua(id))
2494 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2495 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2497 if (strcmp(model, "Maxtor"))
2499 if (strcmp(fw, "BANC1G10"))
2502 return 0; /* blacklisted */
2506 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2507 * @args: device IDENTIFY data / SCSI command of interest.
2508 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2510 * Simulate MODE SENSE commands. Assume this is invoked for direct
2511 * access devices (e.g. disks) only. There should be no block
2512 * descriptor for other device types.
2515 * spin_lock_irqsave(host lock)
2517 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2519 struct ata_device *dev = args->dev;
2520 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2521 const u8 sat_blk_desc[] = {
2522 0, 0, 0, 0, /* number of blocks: sat unspecified */
2524 0, 0x2, 0x0 /* block length: 512 bytes */
2527 unsigned int ebd, page_control, six_byte;
2528 u8 dpofua, bp = 0xff;
2533 six_byte = (scsicmd[0] == MODE_SENSE);
2534 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2536 * LLBA bit in msense(10) ignored (compliant)
2539 page_control = scsicmd[2] >> 6;
2540 switch (page_control) {
2541 case 0: /* current */
2542 case 1: /* changeable */
2543 case 2: /* defaults */
2544 break; /* supported */
2546 goto saving_not_supp;
2554 p += 4 + (ebd ? 8 : 0);
2556 p += 8 + (ebd ? 8 : 0);
2558 pg = scsicmd[2] & 0x3f;
2561 * No mode subpages supported (yet) but asking for _all_
2562 * subpages may be valid
2564 if (spg && (spg != ALL_SUB_MPAGES)) {
2570 case RW_RECOVERY_MPAGE:
2571 p += ata_msense_rw_recovery(p, page_control == 1);
2575 p += ata_msense_caching(args->id, p, page_control == 1);
2579 p += ata_msense_control(args->dev, p, page_control == 1);
2583 p += ata_msense_rw_recovery(p, page_control == 1);
2584 p += ata_msense_caching(args->id, p, page_control == 1);
2585 p += ata_msense_control(args->dev, p, page_control == 1);
2588 default: /* invalid page code */
2594 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2595 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2599 rbuf[0] = p - rbuf - 1;
2602 rbuf[3] = sizeof(sat_blk_desc);
2603 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2606 unsigned int output_len = p - rbuf - 2;
2608 rbuf[0] = output_len >> 8;
2609 rbuf[1] = output_len;
2612 rbuf[7] = sizeof(sat_blk_desc);
2613 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2619 ata_scsi_set_invalid_field(dev, args->cmd, fp, bp);
2623 ata_scsi_set_sense(dev, args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2624 /* "Saving parameters not supported" */
2629 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2630 * @args: device IDENTIFY data / SCSI command of interest.
2631 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2633 * Simulate READ CAPACITY commands.
2638 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2640 struct ata_device *dev = args->dev;
2641 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2642 u32 sector_size; /* physical sector size in bytes */
2646 sector_size = ata_id_logical_sector_size(dev->id);
2647 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2648 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2652 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2653 if (last_lba >= 0xffffffffULL)
2654 last_lba = 0xffffffff;
2656 /* sector count, 32-bit */
2657 rbuf[0] = last_lba >> (8 * 3);
2658 rbuf[1] = last_lba >> (8 * 2);
2659 rbuf[2] = last_lba >> (8 * 1);
2663 rbuf[4] = sector_size >> (8 * 3);
2664 rbuf[5] = sector_size >> (8 * 2);
2665 rbuf[6] = sector_size >> (8 * 1);
2666 rbuf[7] = sector_size;
2668 /* sector count, 64-bit */
2669 rbuf[0] = last_lba >> (8 * 7);
2670 rbuf[1] = last_lba >> (8 * 6);
2671 rbuf[2] = last_lba >> (8 * 5);
2672 rbuf[3] = last_lba >> (8 * 4);
2673 rbuf[4] = last_lba >> (8 * 3);
2674 rbuf[5] = last_lba >> (8 * 2);
2675 rbuf[6] = last_lba >> (8 * 1);
2679 rbuf[ 8] = sector_size >> (8 * 3);
2680 rbuf[ 9] = sector_size >> (8 * 2);
2681 rbuf[10] = sector_size >> (8 * 1);
2682 rbuf[11] = sector_size;
2685 rbuf[13] = log2_per_phys;
2686 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2687 rbuf[15] = lowest_aligned;
2689 if (ata_id_has_trim(args->id) &&
2690 !(dev->horkage & ATA_HORKAGE_NOTRIM)) {
2691 rbuf[14] |= 0x80; /* LBPME */
2693 if (ata_id_has_zero_after_trim(args->id) &&
2694 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) {
2695 ata_dev_info(dev, "Enabling discard_zeroes_data\n");
2696 rbuf[14] |= 0x40; /* LBPRZ */
2699 if (ata_id_zoned_cap(args->id) ||
2700 args->dev->class == ATA_DEV_ZAC)
2701 rbuf[12] = (1 << 4); /* RC_BASIS */
2707 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2708 * @args: device IDENTIFY data / SCSI command of interest.
2709 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2711 * Simulate REPORT LUNS command.
2714 * spin_lock_irqsave(host lock)
2716 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2719 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2724 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2726 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2727 /* FIXME: not quite right; we don't want the
2728 * translation of taskfile registers into
2729 * a sense descriptors, since that's only
2730 * correct for ATA, not ATAPI
2732 ata_gen_passthru_sense(qc);
2738 /* is it pointless to prefer PIO for "safety reasons"? */
2739 static inline int ata_pio_use_silly(struct ata_port *ap)
2741 return (ap->flags & ATA_FLAG_PIO_DMA);
2744 static void atapi_request_sense(struct ata_queued_cmd *qc)
2746 struct ata_port *ap = qc->ap;
2747 struct scsi_cmnd *cmd = qc->scsicmd;
2749 DPRINTK("ATAPI request sense\n");
2751 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2753 #ifdef CONFIG_ATA_SFF
2754 if (ap->ops->sff_tf_read)
2755 ap->ops->sff_tf_read(ap, &qc->tf);
2758 /* fill these in, for the case where they are -not- overwritten */
2759 cmd->sense_buffer[0] = 0x70;
2760 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2764 /* setup sg table and init transfer direction */
2765 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2766 ata_sg_init(qc, &qc->sgent, 1);
2767 qc->dma_dir = DMA_FROM_DEVICE;
2769 memset(&qc->cdb, 0, qc->dev->cdb_len);
2770 qc->cdb[0] = REQUEST_SENSE;
2771 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2773 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2774 qc->tf.command = ATA_CMD_PACKET;
2776 if (ata_pio_use_silly(ap)) {
2777 qc->tf.protocol = ATAPI_PROT_DMA;
2778 qc->tf.feature |= ATAPI_PKT_DMA;
2780 qc->tf.protocol = ATAPI_PROT_PIO;
2781 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2784 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2786 qc->complete_fn = atapi_sense_complete;
2793 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2795 struct scsi_cmnd *cmd = qc->scsicmd;
2796 unsigned int err_mask = qc->err_mask;
2798 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2800 /* handle completion from new EH */
2801 if (unlikely(qc->ap->ops->error_handler &&
2802 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2804 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2805 /* FIXME: not quite right; we don't want the
2806 * translation of taskfile registers into a
2807 * sense descriptors, since that's only
2808 * correct for ATA, not ATAPI
2810 ata_gen_passthru_sense(qc);
2813 /* SCSI EH automatically locks door if sdev->locked is
2814 * set. Sometimes door lock request continues to
2815 * fail, for example, when no media is present. This
2816 * creates a loop - SCSI EH issues door lock which
2817 * fails and gets invoked again to acquire sense data
2818 * for the failed command.
2820 * If door lock fails, always clear sdev->locked to
2821 * avoid this infinite loop.
2823 * This may happen before SCSI scan is complete. Make
2824 * sure qc->dev->sdev isn't NULL before dereferencing.
2826 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2827 qc->dev->sdev->locked = 0;
2829 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2834 /* successful completion or old EH failure path */
2835 if (unlikely(err_mask & AC_ERR_DEV)) {
2836 cmd->result = SAM_STAT_CHECK_CONDITION;
2837 atapi_request_sense(qc);
2839 } else if (unlikely(err_mask)) {
2840 /* FIXME: not quite right; we don't want the
2841 * translation of taskfile registers into
2842 * a sense descriptors, since that's only
2843 * correct for ATA, not ATAPI
2845 ata_gen_passthru_sense(qc);
2847 u8 *scsicmd = cmd->cmnd;
2849 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2850 unsigned long flags;
2853 buf = ata_scsi_rbuf_get(cmd, true, &flags);
2855 /* ATAPI devices typically report zero for their SCSI version,
2856 * and sometimes deviate from the spec WRT response data
2857 * format. If SCSI version is reported as zero like normal,
2858 * then we make the following fixups: 1) Fake MMC-5 version,
2859 * to indicate to the Linux scsi midlayer this is a modern
2860 * device. 2) Ensure response data format / ATAPI information
2861 * are always correct.
2868 ata_scsi_rbuf_put(cmd, true, &flags);
2871 cmd->result = SAM_STAT_GOOD;
2877 * atapi_xlat - Initialize PACKET taskfile
2878 * @qc: command structure to be initialized
2881 * spin_lock_irqsave(host lock)
2884 * Zero on success, non-zero on failure.
2886 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2888 struct scsi_cmnd *scmd = qc->scsicmd;
2889 struct ata_device *dev = qc->dev;
2890 int nodata = (scmd->sc_data_direction == DMA_NONE);
2891 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2892 unsigned int nbytes;
2894 memset(qc->cdb, 0, dev->cdb_len);
2895 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2897 qc->complete_fn = atapi_qc_complete;
2899 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2900 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2901 qc->tf.flags |= ATA_TFLAG_WRITE;
2902 DPRINTK("direction: write\n");
2905 qc->tf.command = ATA_CMD_PACKET;
2906 ata_qc_set_pc_nbytes(qc);
2908 /* check whether ATAPI DMA is safe */
2909 if (!nodata && !using_pio && atapi_check_dma(qc))
2912 /* Some controller variants snoop this value for Packet
2913 * transfers to do state machine and FIFO management. Thus we
2914 * want to set it properly, and for DMA where it is
2915 * effectively meaningless.
2917 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2919 /* Most ATAPI devices which honor transfer chunk size don't
2920 * behave according to the spec when odd chunk size which
2921 * matches the transfer length is specified. If the number of
2922 * bytes to transfer is 2n+1. According to the spec, what
2923 * should happen is to indicate that 2n+1 is going to be
2924 * transferred and transfer 2n+2 bytes where the last byte is
2927 * In practice, this doesn't happen. ATAPI devices first
2928 * indicate and transfer 2n bytes and then indicate and
2929 * transfer 2 bytes where the last byte is padding.
2931 * This inconsistency confuses several controllers which
2932 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2933 * These controllers use actual number of transferred bytes to
2934 * update DMA poitner and transfer of 4n+2 bytes make those
2935 * controller push DMA pointer by 4n+4 bytes because SATA data
2936 * FISes are aligned to 4 bytes. This causes data corruption
2937 * and buffer overrun.
2939 * Always setting nbytes to even number solves this problem
2940 * because then ATAPI devices don't have to split data at 2n
2946 qc->tf.lbam = (nbytes & 0xFF);
2947 qc->tf.lbah = (nbytes >> 8);
2950 qc->tf.protocol = ATAPI_PROT_NODATA;
2952 qc->tf.protocol = ATAPI_PROT_PIO;
2955 qc->tf.protocol = ATAPI_PROT_DMA;
2956 qc->tf.feature |= ATAPI_PKT_DMA;
2958 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2959 (scmd->sc_data_direction != DMA_TO_DEVICE))
2960 /* some SATA bridges need us to indicate data xfer direction */
2961 qc->tf.feature |= ATAPI_DMADIR;
2965 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2966 as ATAPI tape drives don't get this right otherwise */
2970 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2972 if (!sata_pmp_attached(ap)) {
2973 if (likely(devno < ata_link_max_devices(&ap->link)))
2974 return &ap->link.device[devno];
2976 if (likely(devno < ap->nr_pmp_links))
2977 return &ap->pmp_link[devno].device[0];
2983 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2984 const struct scsi_device *scsidev)
2988 /* skip commands not addressed to targets we simulate */
2989 if (!sata_pmp_attached(ap)) {
2990 if (unlikely(scsidev->channel || scsidev->lun))
2992 devno = scsidev->id;
2994 if (unlikely(scsidev->id || scsidev->lun))
2996 devno = scsidev->channel;
2999 return ata_find_dev(ap, devno);
3003 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
3004 * @ap: ATA port to which the device is attached
3005 * @scsidev: SCSI device from which we derive the ATA device
3007 * Given various information provided in struct scsi_cmnd,
3008 * map that onto an ATA bus, and using that mapping
3009 * determine which ata_device is associated with the
3010 * SCSI command to be sent.
3013 * spin_lock_irqsave(host lock)
3016 * Associated ATA device, or %NULL if not found.
3018 static struct ata_device *
3019 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
3021 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
3023 if (unlikely(!dev || !ata_dev_enabled(dev)))
3030 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
3031 * @byte1: Byte 1 from pass-thru CDB.
3034 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
3037 ata_scsi_map_proto(u8 byte1)
3039 switch((byte1 & 0x1e) >> 1) {
3040 case 3: /* Non-data */
3041 return ATA_PROT_NODATA;
3044 case 10: /* UDMA Data-in */
3045 case 11: /* UDMA Data-Out */
3046 return ATA_PROT_DMA;
3048 case 4: /* PIO Data-in */
3049 case 5: /* PIO Data-out */
3050 return ATA_PROT_PIO;
3052 case 12: /* FPDMA */
3053 return ATA_PROT_NCQ;
3055 case 0: /* Hard Reset */
3057 case 8: /* Device Diagnostic */
3058 case 9: /* Device Reset */
3059 case 7: /* DMA Queued */
3060 case 15: /* Return Response Info */
3061 default: /* Reserved */
3065 return ATA_PROT_UNKNOWN;
3069 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
3070 * @qc: command structure to be initialized
3072 * Handles either 12 or 16-byte versions of the CDB.
3075 * Zero on success, non-zero on failure.
3077 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
3079 struct ata_taskfile *tf = &(qc->tf);
3080 struct scsi_cmnd *scmd = qc->scsicmd;
3081 struct ata_device *dev = qc->dev;
3082 const u8 *cdb = scmd->cmnd;
3085 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN) {
3090 if (ata_is_ncq(tf->protocol) && (cdb[2] & 0x3) == 0)
3091 tf->protocol = ATA_PROT_NCQ_NODATA;
3094 tf->flags |= ATA_TFLAG_LBA;
3097 * 12 and 16 byte CDBs use different offsets to
3098 * provide the various register values.
3100 if (cdb[0] == ATA_16) {
3102 * 16-byte CDB - may contain extended commands.
3104 * If that is the case, copy the upper byte register values.
3106 if (cdb[1] & 0x01) {
3107 tf->hob_feature = cdb[3];
3108 tf->hob_nsect = cdb[5];
3109 tf->hob_lbal = cdb[7];
3110 tf->hob_lbam = cdb[9];
3111 tf->hob_lbah = cdb[11];
3112 tf->flags |= ATA_TFLAG_LBA48;
3114 tf->flags &= ~ATA_TFLAG_LBA48;
3117 * Always copy low byte, device and command registers.
3119 tf->feature = cdb[4];
3124 tf->device = cdb[13];
3125 tf->command = cdb[14];
3128 * 12-byte CDB - incapable of extended commands.
3130 tf->flags &= ~ATA_TFLAG_LBA48;
3132 tf->feature = cdb[3];
3137 tf->device = cdb[8];
3138 tf->command = cdb[9];
3141 /* For NCQ commands copy the tag value */
3142 if (ata_is_ncq(tf->protocol))
3143 tf->nsect = qc->tag << 3;
3145 /* enforce correct master/slave bit */
3146 tf->device = dev->devno ?
3147 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
3149 switch (tf->command) {
3150 /* READ/WRITE LONG use a non-standard sect_size */
3151 case ATA_CMD_READ_LONG:
3152 case ATA_CMD_READ_LONG_ONCE:
3153 case ATA_CMD_WRITE_LONG:
3154 case ATA_CMD_WRITE_LONG_ONCE:
3155 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1) {
3159 qc->sect_size = scsi_bufflen(scmd);
3162 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3163 case ATA_CMD_CFA_WRITE_NE:
3164 case ATA_CMD_CFA_TRANS_SECT:
3165 case ATA_CMD_CFA_WRITE_MULT_NE:
3166 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3168 case ATA_CMD_READ_EXT:
3169 case ATA_CMD_READ_QUEUED:
3170 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3171 case ATA_CMD_FPDMA_READ:
3172 case ATA_CMD_READ_MULTI:
3173 case ATA_CMD_READ_MULTI_EXT:
3174 case ATA_CMD_PIO_READ:
3175 case ATA_CMD_PIO_READ_EXT:
3176 case ATA_CMD_READ_STREAM_DMA_EXT:
3177 case ATA_CMD_READ_STREAM_EXT:
3178 case ATA_CMD_VERIFY:
3179 case ATA_CMD_VERIFY_EXT:
3181 case ATA_CMD_WRITE_EXT:
3182 case ATA_CMD_WRITE_FUA_EXT:
3183 case ATA_CMD_WRITE_QUEUED:
3184 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
3185 case ATA_CMD_FPDMA_WRITE:
3186 case ATA_CMD_WRITE_MULTI:
3187 case ATA_CMD_WRITE_MULTI_EXT:
3188 case ATA_CMD_WRITE_MULTI_FUA_EXT:
3189 case ATA_CMD_PIO_WRITE:
3190 case ATA_CMD_PIO_WRITE_EXT:
3191 case ATA_CMD_WRITE_STREAM_DMA_EXT:
3192 case ATA_CMD_WRITE_STREAM_EXT:
3193 qc->sect_size = scmd->device->sector_size;
3196 /* Everything else uses 512 byte "sectors" */
3198 qc->sect_size = ATA_SECT_SIZE;
3202 * Set flags so that all registers will be written, pass on
3203 * write indication (used for PIO/DMA setup), result TF is
3204 * copied back and we don't whine too much about its failure.
3206 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3207 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3208 tf->flags |= ATA_TFLAG_WRITE;
3210 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3213 * Set transfer length.
3215 * TODO: find out if we need to do more here to
3216 * cover scatter/gather case.
3218 ata_qc_set_pc_nbytes(qc);
3220 /* We may not issue DMA commands if no DMA mode is set */
3221 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0) {
3226 /* sanity check for pio multi commands */
3227 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf)) {
3232 if (is_multi_taskfile(tf)) {
3233 unsigned int multi_count = 1 << (cdb[1] >> 5);
3235 /* compare the passed through multi_count
3236 * with the cached multi_count of libata
3238 if (multi_count != dev->multi_count)
3239 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3244 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3245 * SET_FEATURES - XFER MODE must be preceded/succeeded
3246 * by an update to hardware-specific registers for each
3247 * controller (i.e. the reason for ->set_piomode(),
3248 * ->set_dmamode(), and ->post_set_mode() hooks).
3250 if (tf->command == ATA_CMD_SET_FEATURES &&
3251 tf->feature == SETFEATURES_XFER) {
3252 fp = (cdb[0] == ATA_16) ? 4 : 3;
3257 * Filter TPM commands by default. These provide an
3258 * essentially uncontrolled encrypted "back door" between
3259 * applications and the disk. Set libata.allow_tpm=1 if you
3260 * have a real reason for wanting to use them. This ensures
3261 * that installed software cannot easily mess stuff up without
3262 * user intent. DVR type users will probably ship with this enabled
3263 * for movie content management.
3265 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3266 * for this and should do in future but that it is not sufficient as
3267 * DCS is an optional feature set. Thus we also do the software filter
3268 * so that we comply with the TC consortium stated goal that the user
3269 * can turn off TC features of their system.
3271 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm) {
3272 fp = (cdb[0] == ATA_16) ? 14 : 9;
3279 ata_scsi_set_invalid_field(dev, scmd, fp, 0xff);
3284 * ata_format_dsm_trim_descr() - SATL Write Same to DSM Trim
3285 * @cmd: SCSI command being translated
3286 * @trmax: Maximum number of entries that will fit in sector_size bytes.
3287 * @sector: Starting sector
3288 * @count: Total Range of request in logical sectors
3290 * Rewrite the WRITE SAME descriptor to be a DSM TRIM little-endian formatted
3293 * Upto 64 entries of the format:
3294 * 63:48 Range Length
3297 * Range Length of 0 is ignored.
3298 * LBA's should be sorted order and not overlap.
3300 * NOTE: this is the same format as ADD LBA(S) TO NV CACHE PINNED SET
3302 * Return: Number of bytes copied into sglist.
3304 static size_t ata_format_dsm_trim_descr(struct scsi_cmnd *cmd, u32 trmax,
3305 u64 sector, u32 count)
3307 struct scsi_device *sdp = cmd->device;
3308 size_t len = sdp->sector_size;
3312 unsigned long flags;
3314 WARN_ON(len > ATA_SCSI_RBUF_SIZE);
3316 if (len > ATA_SCSI_RBUF_SIZE)
3317 len = ATA_SCSI_RBUF_SIZE;
3319 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
3320 buf = ((void *)ata_scsi_rbuf);
3321 memset(buf, 0, len);
3323 u64 entry = sector |
3324 ((u64)(count > 0xffff ? 0xffff : count) << 48);
3325 buf[i++] = __cpu_to_le64(entry);
3326 if (count <= 0xffff)
3331 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len);
3332 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
3338 * ata_format_dsm_trim_descr() - SATL Write Same to ATA SCT Write Same
3339 * @cmd: SCSI command being translated
3340 * @lba: Starting sector
3341 * @num: Number of sectors to be zero'd.
3343 * Rewrite the WRITE SAME payload to be an SCT Write Same formatted
3345 * NOTE: Writes a pattern (0's) in the foreground.
3347 * Return: Number of bytes copied into sglist.
3349 static size_t ata_format_sct_write_same(struct scsi_cmnd *cmd, u64 lba, u64 num)
3351 struct scsi_device *sdp = cmd->device;
3352 size_t len = sdp->sector_size;
3355 unsigned long flags;
3357 spin_lock_irqsave(&ata_scsi_rbuf_lock, flags);
3358 buf = ((void *)ata_scsi_rbuf);
3360 put_unaligned_le16(0x0002, &buf[0]); /* SCT_ACT_WRITE_SAME */
3361 put_unaligned_le16(0x0101, &buf[1]); /* WRITE PTRN FG */
3362 put_unaligned_le64(lba, &buf[2]);
3363 put_unaligned_le64(num, &buf[6]);
3364 put_unaligned_le32(0u, &buf[10]); /* pattern */
3366 WARN_ON(len > ATA_SCSI_RBUF_SIZE);
3368 if (len > ATA_SCSI_RBUF_SIZE)
3369 len = ATA_SCSI_RBUF_SIZE;
3371 r = sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd), buf, len);
3372 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, flags);
3378 * ata_scsi_write_same_xlat() - SATL Write Same to ATA SCT Write Same
3379 * @qc: Command to be translated
3381 * Translate a SCSI WRITE SAME command to be either a DSM TRIM command or
3382 * an SCT Write Same command.
3383 * Based on WRITE SAME has the UNMAP flag
3384 * When set translate to DSM TRIM
3385 * When clear translate to SCT Write Same
3387 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3389 struct ata_taskfile *tf = &qc->tf;
3390 struct scsi_cmnd *scmd = qc->scsicmd;
3391 struct scsi_device *sdp = scmd->device;
3392 size_t len = sdp->sector_size;
3393 struct ata_device *dev = qc->dev;
3394 const u8 *cdb = scmd->cmnd;
3397 const u32 trmax = len >> 3;
3401 u8 unmap = cdb[1] & 0x8;
3403 /* we may not issue DMA commands if no DMA mode is set */
3404 if (unlikely(!dev->dma_mode))
3405 goto invalid_opcode;
3407 if (unlikely(scmd->cmd_len < 16)) {
3411 scsi_16_lba_len(cdb, &block, &n_block);
3414 /* If trim is not enabled the cmd is invalid. */
3415 if ((dev->horkage & ATA_HORKAGE_NOTRIM) ||
3416 !ata_id_has_trim(dev->id)) {
3421 /* If the request is too large the cmd is invalid */
3422 if (n_block > 0xffff * trmax) {
3427 /* If write same is not available the cmd is invalid */
3428 if (!ata_id_sct_write_same(dev->id)) {
3436 * WRITE SAME always has a sector sized buffer as payload, this
3437 * should never be a multiple entry S/G list.
3439 if (!scsi_sg_count(scmd))
3440 goto invalid_param_len;
3443 * size must match sector size in bytes
3444 * For DATA SET MANAGEMENT TRIM in ACS-2 nsect (aka count)
3445 * is defined as number of 512 byte blocks to be transferred.
3448 size = ata_format_dsm_trim_descr(scmd, trmax, block, n_block);
3450 goto invalid_param_len;
3452 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3453 /* Newer devices support queued TRIM commands */
3454 tf->protocol = ATA_PROT_NCQ;
3455 tf->command = ATA_CMD_FPDMA_SEND;
3456 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3457 tf->nsect = qc->tag << 3;
3458 tf->hob_feature = (size / 512) >> 8;
3459 tf->feature = size / 512;
3463 tf->protocol = ATA_PROT_DMA;
3464 tf->hob_feature = 0;
3465 tf->feature = ATA_DSM_TRIM;
3466 tf->hob_nsect = (size / 512) >> 8;
3467 tf->nsect = size / 512;
3468 tf->command = ATA_CMD_DSM;
3471 size = ata_format_sct_write_same(scmd, block, n_block);
3473 goto invalid_param_len;
3475 tf->hob_feature = 0;
3481 tf->lbal = ATA_CMD_STANDBYNOW1;
3485 tf->device = ATA_CMD_STANDBYNOW1;
3486 tf->protocol = ATA_PROT_DMA;
3487 tf->command = ATA_CMD_WRITE_LOG_DMA_EXT;
3488 if (unlikely(dev->flags & ATA_DFLAG_PIO))
3489 tf->command = ATA_CMD_WRITE_LOG_EXT;
3492 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3495 ata_qc_set_pc_nbytes(qc);
3500 ata_scsi_set_invalid_field(dev, scmd, fp, bp);
3503 /* "Parameter list length error" */
3504 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3507 /* "Invalid command operation code" */
3508 ata_scsi_set_sense(dev, scmd, ILLEGAL_REQUEST, 0x20, 0x0);
3513 * ata_scsiop_maint_in - Simulate a subset of MAINTENANCE_IN
3514 * @args: device MAINTENANCE_IN data / SCSI command of interest.
3515 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
3517 * Yields a subset to satisfy scsi_report_opcode()
3520 * spin_lock_irqsave(host lock)
3522 static unsigned int ata_scsiop_maint_in(struct ata_scsi_args *args, u8 *rbuf)
3524 struct ata_device *dev = args->dev;
3525 u8 *cdb = args->cmd->cmnd;
3527 unsigned int err = 0;
3530 ata_dev_warn(dev, "invalid command format %d\n", cdb[2]);
3539 case SERVICE_ACTION_IN_16:
3542 case SYNCHRONIZE_CACHE:
3546 case TEST_UNIT_READY:
3547 case SEND_DIAGNOSTIC:
3548 case MAINTENANCE_IN:
3560 case MODE_SELECT_10:
3565 if (!ata_id_sct_write_same(dev->id))
3567 /* fallthrough: if SCT ... only enable for ZBC */
3570 if (ata_id_zoned_cap(dev->id) ||
3571 dev->class == ATA_DEV_ZAC)
3578 rbuf[1] = supported; /* supported */
3583 * ata_scsi_report_zones_complete - convert ATA output
3584 * @qc: command structure returning the data
3586 * Convert T-13 little-endian field representation into
3587 * T-10 big-endian field representation.
3590 static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc)
3592 struct scsi_cmnd *scmd = qc->scsicmd;
3593 struct sg_mapping_iter miter;
3594 unsigned long flags;
3595 unsigned int bytes = 0;
3597 sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd),
3598 SG_MITER_TO_SG | SG_MITER_ATOMIC);
3600 local_irq_save(flags);
3601 while (sg_miter_next(&miter)) {
3602 unsigned int offset = 0;
3607 u64 max_lba, opt_lba;
3610 /* Swizzle header */
3612 list_length = get_unaligned_le32(&hdr[0]);
3613 same = get_unaligned_le16(&hdr[4]);
3614 max_lba = get_unaligned_le64(&hdr[8]);
3615 opt_lba = get_unaligned_le64(&hdr[16]);
3616 put_unaligned_be32(list_length, &hdr[0]);
3617 hdr[4] = same & 0xf;
3618 put_unaligned_be64(max_lba, &hdr[8]);
3619 put_unaligned_be64(opt_lba, &hdr[16]);
3623 while (offset < miter.length) {
3625 u8 cond, type, non_seq, reset;
3626 u64 size, start, wp;
3628 /* Swizzle zone descriptor */
3629 rec = miter.addr + offset;
3630 type = rec[0] & 0xf;
3631 cond = (rec[1] >> 4) & 0xf;
3632 non_seq = (rec[1] & 2);
3633 reset = (rec[1] & 1);
3634 size = get_unaligned_le64(&rec[8]);
3635 start = get_unaligned_le64(&rec[16]);
3636 wp = get_unaligned_le64(&rec[24]);
3638 rec[1] = (cond << 4) | non_seq | reset;
3639 put_unaligned_be64(size, &rec[8]);
3640 put_unaligned_be64(start, &rec[16]);
3641 put_unaligned_be64(wp, &rec[24]);
3642 WARN_ON(offset + 64 > miter.length);
3647 sg_miter_stop(&miter);
3648 local_irq_restore(flags);
3650 ata_scsi_qc_complete(qc);
3653 static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc)
3655 struct ata_taskfile *tf = &qc->tf;
3656 struct scsi_cmnd *scmd = qc->scsicmd;
3657 const u8 *cdb = scmd->cmnd;
3658 u16 sect, fp = (u16)-1;
3659 u8 sa, options, bp = 0xff;
3663 if (unlikely(scmd->cmd_len < 16)) {
3664 ata_dev_warn(qc->dev, "invalid cdb length %d\n",
3669 scsi_16_lba_len(cdb, &block, &n_block);
3670 if (n_block != scsi_bufflen(scmd)) {
3671 ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n",
3672 n_block, scsi_bufflen(scmd));
3673 goto invalid_param_len;
3676 if (sa != ZI_REPORT_ZONES) {
3677 ata_dev_warn(qc->dev, "invalid service action %d\n", sa);
3682 * ZAC allows only for transfers in 512 byte blocks,
3683 * and uses a 16 bit value for the transfer count.
3685 if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) {
3686 ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block);
3687 goto invalid_param_len;
3689 sect = n_block / 512;
3690 options = cdb[14] & 0xbf;
3692 if (ata_ncq_enabled(qc->dev) &&
3693 ata_fpdma_zac_mgmt_in_supported(qc->dev)) {
3694 tf->protocol = ATA_PROT_NCQ;
3695 tf->command = ATA_CMD_FPDMA_RECV;
3696 tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f;
3697 tf->nsect = qc->tag << 3;
3698 tf->feature = sect & 0xff;
3699 tf->hob_feature = (sect >> 8) & 0xff;
3700 tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES | (options << 8);
3702 tf->command = ATA_CMD_ZAC_MGMT_IN;
3703 tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES;
3704 tf->protocol = ATA_PROT_DMA;
3705 tf->hob_feature = options;
3706 tf->hob_nsect = (sect >> 8) & 0xff;
3707 tf->nsect = sect & 0xff;
3709 tf->device = ATA_LBA;
3710 tf->lbah = (block >> 16) & 0xff;
3711 tf->lbam = (block >> 8) & 0xff;
3712 tf->lbal = block & 0xff;
3713 tf->hob_lbah = (block >> 40) & 0xff;
3714 tf->hob_lbam = (block >> 32) & 0xff;
3715 tf->hob_lbal = (block >> 24) & 0xff;
3717 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3718 qc->flags |= ATA_QCFLAG_RESULT_TF;
3720 ata_qc_set_pc_nbytes(qc);
3722 qc->complete_fn = ata_scsi_report_zones_complete;
3727 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
3731 /* "Parameter list length error" */
3732 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3736 static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc)
3738 struct ata_taskfile *tf = &qc->tf;
3739 struct scsi_cmnd *scmd = qc->scsicmd;
3740 struct ata_device *dev = qc->dev;
3741 const u8 *cdb = scmd->cmnd;
3747 if (unlikely(scmd->cmd_len < 16)) {
3753 if ((sa != ZO_CLOSE_ZONE) && (sa != ZO_FINISH_ZONE) &&
3754 (sa != ZO_OPEN_ZONE) && (sa != ZO_RESET_WRITE_POINTER)) {
3759 scsi_16_lba_len(cdb, &block, &n_block);
3762 * ZAC MANAGEMENT OUT doesn't define any length
3764 goto invalid_param_len;
3766 if (block > dev->n_sectors)
3769 all = cdb[14] & 0x1;
3771 if (ata_ncq_enabled(qc->dev) &&
3772 ata_fpdma_zac_mgmt_out_supported(qc->dev)) {
3773 tf->protocol = ATA_PROT_NCQ_NODATA;
3774 tf->command = ATA_CMD_NCQ_NON_DATA;
3775 tf->feature = ATA_SUBCMD_NCQ_NON_DATA_ZAC_MGMT_OUT;
3776 tf->nsect = qc->tag << 3;
3777 tf->auxiliary = sa | ((u16)all << 8);
3779 tf->protocol = ATA_PROT_NODATA;
3780 tf->command = ATA_CMD_ZAC_MGMT_OUT;
3782 tf->hob_feature = all;
3784 tf->lbah = (block >> 16) & 0xff;
3785 tf->lbam = (block >> 8) & 0xff;
3786 tf->lbal = block & 0xff;
3787 tf->hob_lbah = (block >> 40) & 0xff;
3788 tf->hob_lbam = (block >> 32) & 0xff;
3789 tf->hob_lbal = (block >> 24) & 0xff;
3790 tf->device = ATA_LBA;
3791 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
3796 ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff);
3799 /* "Logical Block Address out of range" */
3800 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x00);
3803 /* "Parameter list length error" */
3804 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3809 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3810 * @qc: Storage for translated ATA taskfile
3811 * @buf: input buffer
3812 * @len: number of valid bytes in the input buffer
3813 * @fp: out parameter for the failed field on error
3815 * Prepare a taskfile to modify caching information for the device.
3820 static int ata_mselect_caching(struct ata_queued_cmd *qc,
3821 const u8 *buf, int len, u16 *fp)
3823 struct ata_taskfile *tf = &qc->tf;
3824 struct ata_device *dev = qc->dev;
3825 u8 mpage[CACHE_MPAGE_LEN];
3830 * The first two bytes of def_cache_mpage are a header, so offsets
3831 * in mpage are off by 2 compared to buf. Same for len.
3834 if (len != CACHE_MPAGE_LEN - 2) {
3835 if (len < CACHE_MPAGE_LEN - 2)
3838 *fp = CACHE_MPAGE_LEN - 2;
3842 wce = buf[0] & (1 << 2);
3845 * Check that read-only bits are not modified.
3847 ata_msense_caching(dev->id, mpage, false);
3848 for (i = 0; i < CACHE_MPAGE_LEN - 2; i++) {
3851 if (mpage[i + 2] != buf[i]) {
3857 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3858 tf->protocol = ATA_PROT_NODATA;
3860 tf->command = ATA_CMD_SET_FEATURES;
3861 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3866 * ata_mselect_control - Simulate MODE SELECT for control page
3867 * @qc: Storage for translated ATA taskfile
3868 * @buf: input buffer
3869 * @len: number of valid bytes in the input buffer
3870 * @fp: out parameter for the failed field on error
3872 * Prepare a taskfile to modify caching information for the device.
3877 static int ata_mselect_control(struct ata_queued_cmd *qc,
3878 const u8 *buf, int len, u16 *fp)
3880 struct ata_device *dev = qc->dev;
3881 u8 mpage[CONTROL_MPAGE_LEN];
3886 * The first two bytes of def_control_mpage are a header, so offsets
3887 * in mpage are off by 2 compared to buf. Same for len.
3890 if (len != CONTROL_MPAGE_LEN - 2) {
3891 if (len < CONTROL_MPAGE_LEN - 2)
3894 *fp = CONTROL_MPAGE_LEN - 2;
3898 d_sense = buf[0] & (1 << 2);
3901 * Check that read-only bits are not modified.
3903 ata_msense_control(dev, mpage, false);
3904 for (i = 0; i < CONTROL_MPAGE_LEN - 2; i++) {
3907 if (mpage[2 + i] != buf[i]) {
3912 if (d_sense & (1 << 2))
3913 dev->flags |= ATA_DFLAG_D_SENSE;
3915 dev->flags &= ~ATA_DFLAG_D_SENSE;
3920 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
3921 * @qc: Storage for translated ATA taskfile
3923 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3924 * Assume this is invoked for direct access devices (e.g. disks) only.
3925 * There should be no block descriptor for other device types.
3928 * spin_lock_irqsave(host lock)
3930 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3932 struct scsi_cmnd *scmd = qc->scsicmd;
3933 const u8 *cdb = scmd->cmnd;
3936 unsigned six_byte, pg_len, hdr_len, bd_len;
3943 six_byte = (cdb[0] == MODE_SELECT);
3945 if (scmd->cmd_len < 5) {
3953 if (scmd->cmd_len < 9) {
3958 len = (cdb[7] << 8) + cdb[8];
3962 /* We only support PF=1, SP=0. */
3963 if ((cdb[1] & 0x11) != 0x10) {
3965 bp = (cdb[1] & 0x01) ? 1 : 5;
3969 /* Test early for possible overrun. */
3970 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
3971 goto invalid_param_len;
3973 p = page_address(sg_page(scsi_sglist(scmd)));
3975 /* Move past header and block descriptors. */
3977 goto invalid_param_len;
3982 bd_len = (p[6] << 8) + p[7];
3987 goto invalid_param_len;
3988 if (bd_len != 0 && bd_len != 8) {
3989 fp = (six_byte) ? 3 : 6;
3990 fp += bd_len + hdr_len;
3999 /* Parse both possible formats for the mode page headers. */
4003 goto invalid_param_len;
4006 pg_len = (p[2] << 8) | p[3];
4011 goto invalid_param_len;
4020 * No mode subpages supported (yet) but asking for _all_
4021 * subpages may be valid
4023 if (spg && (spg != ALL_SUB_MPAGES)) {
4024 fp = (p[0] & 0x40) ? 1 : 0;
4025 fp += hdr_len + bd_len;
4029 goto invalid_param_len;
4033 if (ata_mselect_caching(qc, p, pg_len, &fp) < 0) {
4034 fp += hdr_len + bd_len;
4039 if (ata_mselect_control(qc, p, pg_len, &fp) < 0) {
4040 fp += hdr_len + bd_len;
4043 goto skip; /* No ATA command to send */
4046 default: /* invalid page code */
4047 fp = bd_len + hdr_len;
4052 * Only one page has changeable data, so we only support setting one
4061 ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
4065 ata_scsi_set_invalid_parameter(qc->dev, scmd, fp);
4069 /* "Parameter list length error" */
4070 ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
4074 scmd->result = SAM_STAT_GOOD;
4079 * ata_get_xlat_func - check if SCSI to ATA translation is possible
4081 * @cmd: SCSI command opcode to consider
4083 * Look up the SCSI command given, and determine whether the
4084 * SCSI command is to be translated or simulated.
4087 * Pointer to translation function if possible, %NULL if not.
4090 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
4100 return ata_scsi_rw_xlat;
4103 return ata_scsi_write_same_xlat;
4105 case SYNCHRONIZE_CACHE:
4106 if (ata_try_flush_cache(dev))
4107 return ata_scsi_flush_xlat;
4112 return ata_scsi_verify_xlat;
4116 return ata_scsi_pass_thru;
4119 case MODE_SELECT_10:
4120 return ata_scsi_mode_select_xlat;
4124 return ata_scsi_zbc_in_xlat;
4127 return ata_scsi_zbc_out_xlat;
4130 return ata_scsi_start_stop_xlat;
4137 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
4138 * @ap: ATA port to which the command was being sent
4139 * @cmd: SCSI command to dump
4141 * Prints the contents of a SCSI command via printk().
4144 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
4145 struct scsi_cmnd *cmd)
4148 struct scsi_device *scsidev = cmd->device;
4150 DPRINTK("CDB (%u:%d,%d,%d) %9ph\n",
4152 scsidev->channel, scsidev->id, scsidev->lun,
4157 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
4158 struct ata_device *dev)
4160 u8 scsi_op = scmd->cmnd[0];
4161 ata_xlat_func_t xlat_func;
4164 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
4165 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
4168 xlat_func = ata_get_xlat_func(dev, scsi_op);
4170 if (unlikely(!scmd->cmd_len))
4174 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
4175 /* relay SCSI command to ATAPI device */
4176 int len = COMMAND_SIZE(scsi_op);
4177 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
4180 xlat_func = atapi_xlat;
4182 /* ATA_16 passthru, treat as an ATA command */
4183 if (unlikely(scmd->cmd_len > 16))
4186 xlat_func = ata_get_xlat_func(dev, scsi_op);
4191 rc = ata_scsi_translate(dev, scmd, xlat_func);
4193 ata_scsi_simulate(dev, scmd);
4198 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
4199 scmd->cmd_len, scsi_op, dev->cdb_len);
4200 scmd->result = DID_ERROR << 16;
4201 scmd->scsi_done(scmd);
4206 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
4207 * @shost: SCSI host of command to be sent
4208 * @cmd: SCSI command to be sent
4210 * In some cases, this function translates SCSI commands into
4211 * ATA taskfiles, and queues the taskfiles to be sent to
4212 * hardware. In other cases, this function simulates a
4213 * SCSI device by evaluating and responding to certain
4214 * SCSI commands. This creates the overall effect of
4215 * ATA and ATAPI devices appearing as SCSI devices.
4221 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4224 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
4226 struct ata_port *ap;
4227 struct ata_device *dev;
4228 struct scsi_device *scsidev = cmd->device;
4230 unsigned long irq_flags;
4232 ap = ata_shost_to_port(shost);
4234 spin_lock_irqsave(ap->lock, irq_flags);
4236 ata_scsi_dump_cdb(ap, cmd);
4238 dev = ata_scsi_find_dev(ap, scsidev);
4240 rc = __ata_scsi_queuecmd(cmd, dev);
4242 cmd->result = (DID_BAD_TARGET << 16);
4243 cmd->scsi_done(cmd);
4246 spin_unlock_irqrestore(ap->lock, irq_flags);
4252 * ata_scsi_simulate - simulate SCSI command on ATA device
4253 * @dev: the target device
4254 * @cmd: SCSI command being sent to device.
4256 * Interprets and directly executes a select list of SCSI commands
4257 * that can be handled internally.
4260 * spin_lock_irqsave(host lock)
4263 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
4265 struct ata_scsi_args args;
4266 const u8 *scsicmd = cmd->cmnd;
4272 args.done = cmd->scsi_done;
4274 switch(scsicmd[0]) {
4276 if (scsicmd[1] & 2) /* is CmdDt set? */
4277 ata_scsi_invalid_field(dev, cmd, 1);
4278 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
4279 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
4280 else switch (scsicmd[2]) {
4282 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
4285 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
4288 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
4291 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
4294 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
4297 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
4300 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
4303 if (dev->flags & ATA_DFLAG_ZAC) {
4304 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6);
4309 ata_scsi_invalid_field(dev, cmd, 2);
4316 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
4320 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4323 case SERVICE_ACTION_IN_16:
4324 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
4325 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
4327 ata_scsi_invalid_field(dev, cmd, 1);
4331 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
4335 ata_scsi_set_sense(dev, cmd, 0, 0, 0);
4336 cmd->result = (DRIVER_SENSE << 24);
4337 cmd->scsi_done(cmd);
4340 /* if we reach this, then writeback caching is disabled,
4341 * turning this into a no-op.
4343 case SYNCHRONIZE_CACHE:
4346 /* no-op's, complete with success */
4350 case TEST_UNIT_READY:
4351 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
4354 case SEND_DIAGNOSTIC:
4355 tmp8 = scsicmd[1] & ~(1 << 3);
4356 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
4357 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
4359 ata_scsi_invalid_field(dev, cmd, 1);
4362 case MAINTENANCE_IN:
4363 if (scsicmd[1] == MI_REPORT_SUPPORTED_OPERATION_CODES)
4364 ata_scsi_rbuf_fill(&args, ata_scsiop_maint_in);
4366 ata_scsi_invalid_field(dev, cmd, 1);
4369 /* all other commands */
4371 ata_scsi_set_sense(dev, cmd, ILLEGAL_REQUEST, 0x20, 0x0);
4372 /* "Invalid command operation code" */
4373 cmd->scsi_done(cmd);
4378 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
4382 for (i = 0; i < host->n_ports; i++) {
4383 struct ata_port *ap = host->ports[i];
4384 struct Scsi_Host *shost;
4387 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
4391 shost->eh_noresume = 1;
4392 *(struct ata_port **)&shost->hostdata[0] = ap;
4393 ap->scsi_host = shost;
4395 shost->transportt = ata_scsi_transport_template;
4396 shost->unique_id = ap->print_id;
4399 shost->max_channel = 1;
4400 shost->max_cmd_len = 16;
4402 /* Schedule policy is determined by ->qc_defer()
4403 * callback and it needs to see every deferred qc.
4404 * Set host_blocked to 1 to prevent SCSI midlayer from
4405 * automatically deferring requests.
4407 shost->max_host_blocked = 1;
4409 rc = scsi_add_host_with_dma(ap->scsi_host,
4410 &ap->tdev, ap->host->dev);
4418 scsi_host_put(host->ports[i]->scsi_host);
4421 struct Scsi_Host *shost = host->ports[i]->scsi_host;
4423 scsi_remove_host(shost);
4424 scsi_host_put(shost);
4429 void ata_scsi_scan_host(struct ata_port *ap, int sync)
4432 struct ata_device *last_failed_dev = NULL;
4433 struct ata_link *link;
4434 struct ata_device *dev;
4437 ata_for_each_link(link, ap, EDGE) {
4438 ata_for_each_dev(dev, link, ENABLED) {
4439 struct scsi_device *sdev;
4440 int channel = 0, id = 0;
4445 if (ata_is_host_link(link))
4448 channel = link->pmp;
4450 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
4452 if (!IS_ERR(sdev)) {
4454 scsi_device_put(sdev);
4461 /* If we scanned while EH was in progress or allocation
4462 * failure occurred, scan would have failed silently. Check
4463 * whether all devices are attached.
4465 ata_for_each_link(link, ap, EDGE) {
4466 ata_for_each_dev(dev, link, ENABLED) {
4475 /* we're missing some SCSI devices */
4477 /* If caller requested synchrnous scan && we've made
4478 * any progress, sleep briefly and repeat.
4480 if (dev != last_failed_dev) {
4482 last_failed_dev = dev;
4486 /* We might be failing to detect boot device, give it
4487 * a few more chances.
4495 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
4498 queue_delayed_work(system_long_wq, &ap->hotplug_task,
4499 round_jiffies_relative(HZ));
4503 * ata_scsi_offline_dev - offline attached SCSI device
4504 * @dev: ATA device to offline attached SCSI device for
4506 * This function is called from ata_eh_hotplug() and responsible
4507 * for taking the SCSI device attached to @dev offline. This
4508 * function is called with host lock which protects dev->sdev
4512 * spin_lock_irqsave(host lock)
4515 * 1 if attached SCSI device exists, 0 otherwise.
4517 int ata_scsi_offline_dev(struct ata_device *dev)
4520 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
4527 * ata_scsi_remove_dev - remove attached SCSI device
4528 * @dev: ATA device to remove attached SCSI device for
4530 * This function is called from ata_eh_scsi_hotplug() and
4531 * responsible for removing the SCSI device attached to @dev.
4534 * Kernel thread context (may sleep).
4536 static void ata_scsi_remove_dev(struct ata_device *dev)
4538 struct ata_port *ap = dev->link->ap;
4539 struct scsi_device *sdev;
4540 unsigned long flags;
4542 /* Alas, we need to grab scan_mutex to ensure SCSI device
4543 * state doesn't change underneath us and thus
4544 * scsi_device_get() always succeeds. The mutex locking can
4545 * be removed if there is __scsi_device_get() interface which
4546 * increments reference counts regardless of device state.
4548 mutex_lock(&ap->scsi_host->scan_mutex);
4549 spin_lock_irqsave(ap->lock, flags);
4551 /* clearing dev->sdev is protected by host lock */
4556 /* If user initiated unplug races with us, sdev can go
4557 * away underneath us after the host lock and
4558 * scan_mutex are released. Hold onto it.
4560 if (scsi_device_get(sdev) == 0) {
4561 /* The following ensures the attached sdev is
4562 * offline on return from ata_scsi_offline_dev()
4563 * regardless it wins or loses the race
4564 * against this function.
4566 scsi_device_set_state(sdev, SDEV_OFFLINE);
4573 spin_unlock_irqrestore(ap->lock, flags);
4574 mutex_unlock(&ap->scsi_host->scan_mutex);
4577 ata_dev_info(dev, "detaching (SCSI %s)\n",
4578 dev_name(&sdev->sdev_gendev));
4580 scsi_remove_device(sdev);
4581 scsi_device_put(sdev);
4585 static void ata_scsi_handle_link_detach(struct ata_link *link)
4587 struct ata_port *ap = link->ap;
4588 struct ata_device *dev;
4590 ata_for_each_dev(dev, link, ALL) {
4591 unsigned long flags;
4593 if (!(dev->flags & ATA_DFLAG_DETACHED))
4596 spin_lock_irqsave(ap->lock, flags);
4597 dev->flags &= ~ATA_DFLAG_DETACHED;
4598 spin_unlock_irqrestore(ap->lock, flags);
4600 if (zpodd_dev_enabled(dev))
4603 ata_scsi_remove_dev(dev);
4608 * ata_scsi_media_change_notify - send media change event
4609 * @dev: Pointer to the disk device with media change event
4611 * Tell the block layer to send a media change notification
4615 * spin_lock_irqsave(host lock)
4617 void ata_scsi_media_change_notify(struct ata_device *dev)
4620 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
4625 * ata_scsi_hotplug - SCSI part of hotplug
4626 * @work: Pointer to ATA port to perform SCSI hotplug on
4628 * Perform SCSI part of hotplug. It's executed from a separate
4629 * workqueue after EH completes. This is necessary because SCSI
4630 * hot plugging requires working EH and hot unplugging is
4631 * synchronized with hot plugging with a mutex.
4634 * Kernel thread context (may sleep).
4636 void ata_scsi_hotplug(struct work_struct *work)
4638 struct ata_port *ap =
4639 container_of(work, struct ata_port, hotplug_task.work);
4642 if (ap->pflags & ATA_PFLAG_UNLOADING) {
4643 DPRINTK("ENTER/EXIT - unloading\n");
4650 * The block layer suspend/resume path is fundamentally broken due
4651 * to freezable kthreads and workqueue and may deadlock if a block
4652 * device gets removed while resume is in progress. I don't know
4653 * what the solution is short of removing freezable kthreads and
4654 * workqueues altogether.
4656 * The following is an ugly hack to avoid kicking off device
4657 * removal while freezer is active. This is a joke but does avoid
4658 * this particular deadlock scenario.
4660 * https://bugzilla.kernel.org/show_bug.cgi?id=62801
4661 * http://marc.info/?l=linux-kernel&m=138695698516487
4663 #ifdef CONFIG_FREEZER
4669 mutex_lock(&ap->scsi_scan_mutex);
4671 /* Unplug detached devices. We cannot use link iterator here
4672 * because PMP links have to be scanned even if PMP is
4673 * currently not attached. Iterate manually.
4675 ata_scsi_handle_link_detach(&ap->link);
4677 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
4678 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
4680 /* scan for new ones */
4681 ata_scsi_scan_host(ap, 0);
4683 mutex_unlock(&ap->scsi_scan_mutex);
4688 * ata_scsi_user_scan - indication for user-initiated bus scan
4689 * @shost: SCSI host to scan
4690 * @channel: Channel to scan
4694 * This function is called when user explicitly requests bus
4695 * scan. Set probe pending flag and invoke EH.
4698 * SCSI layer (we don't care)
4703 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
4704 unsigned int id, u64 lun)
4706 struct ata_port *ap = ata_shost_to_port(shost);
4707 unsigned long flags;
4710 if (!ap->ops->error_handler)
4713 if (lun != SCAN_WILD_CARD && lun)
4716 if (!sata_pmp_attached(ap)) {
4717 if (channel != SCAN_WILD_CARD && channel)
4721 if (id != SCAN_WILD_CARD && id)
4726 spin_lock_irqsave(ap->lock, flags);
4728 if (devno == SCAN_WILD_CARD) {
4729 struct ata_link *link;
4731 ata_for_each_link(link, ap, EDGE) {
4732 struct ata_eh_info *ehi = &link->eh_info;
4733 ehi->probe_mask |= ATA_ALL_DEVICES;
4734 ehi->action |= ATA_EH_RESET;
4737 struct ata_device *dev = ata_find_dev(ap, devno);
4740 struct ata_eh_info *ehi = &dev->link->eh_info;
4741 ehi->probe_mask |= 1 << dev->devno;
4742 ehi->action |= ATA_EH_RESET;
4748 ata_port_schedule_eh(ap);
4749 spin_unlock_irqrestore(ap->lock, flags);
4750 ata_port_wait_eh(ap);
4752 spin_unlock_irqrestore(ap->lock, flags);
4758 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4759 * @work: Pointer to ATA port to perform scsi_rescan_device()
4761 * After ATA pass thru (SAT) commands are executed successfully,
4762 * libata need to propagate the changes to SCSI layer.
4765 * Kernel thread context (may sleep).
4767 void ata_scsi_dev_rescan(struct work_struct *work)
4769 struct ata_port *ap =
4770 container_of(work, struct ata_port, scsi_rescan_task);
4771 struct ata_link *link;
4772 struct ata_device *dev;
4773 unsigned long flags;
4775 mutex_lock(&ap->scsi_scan_mutex);
4776 spin_lock_irqsave(ap->lock, flags);
4778 ata_for_each_link(link, ap, EDGE) {
4779 ata_for_each_dev(dev, link, ENABLED) {
4780 struct scsi_device *sdev = dev->sdev;
4784 if (scsi_device_get(sdev))
4787 spin_unlock_irqrestore(ap->lock, flags);
4788 scsi_rescan_device(&(sdev->sdev_gendev));
4789 scsi_device_put(sdev);
4790 spin_lock_irqsave(ap->lock, flags);
4794 spin_unlock_irqrestore(ap->lock, flags);
4795 mutex_unlock(&ap->scsi_scan_mutex);
4799 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4800 * @host: ATA host container for all SAS ports
4801 * @port_info: Information from low-level host driver
4802 * @shost: SCSI host that the scsi device is attached to
4805 * PCI/etc. bus probe sem.
4808 * ata_port pointer on success / NULL on failure.
4811 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
4812 struct ata_port_info *port_info,
4813 struct Scsi_Host *shost)
4815 struct ata_port *ap;
4817 ap = ata_port_alloc(host);
4822 ap->lock = &host->lock;
4823 ap->pio_mask = port_info->pio_mask;
4824 ap->mwdma_mask = port_info->mwdma_mask;
4825 ap->udma_mask = port_info->udma_mask;
4826 ap->flags |= port_info->flags;
4827 ap->ops = port_info->port_ops;
4828 ap->cbl = ATA_CBL_SATA;
4832 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
4835 * ata_sas_port_start - Set port up for dma.
4836 * @ap: Port to initialize
4838 * Called just after data structures for each port are
4841 * May be used as the port_start() entry in ata_port_operations.
4844 * Inherited from caller.
4846 int ata_sas_port_start(struct ata_port *ap)
4849 * the port is marked as frozen at allocation time, but if we don't
4850 * have new eh, we won't thaw it
4852 if (!ap->ops->error_handler)
4853 ap->pflags &= ~ATA_PFLAG_FROZEN;
4856 EXPORT_SYMBOL_GPL(ata_sas_port_start);
4859 * ata_port_stop - Undo ata_sas_port_start()
4860 * @ap: Port to shut down
4862 * May be used as the port_stop() entry in ata_port_operations.
4865 * Inherited from caller.
4868 void ata_sas_port_stop(struct ata_port *ap)
4871 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
4874 * ata_sas_async_probe - simply schedule probing and return
4875 * @ap: Port to probe
4877 * For batch scheduling of probe for sas attached ata devices, assumes
4878 * the port has already been through ata_sas_port_init()
4880 void ata_sas_async_probe(struct ata_port *ap)
4882 __ata_port_probe(ap);
4884 EXPORT_SYMBOL_GPL(ata_sas_async_probe);
4886 int ata_sas_sync_probe(struct ata_port *ap)
4888 return ata_port_probe(ap);
4890 EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
4894 * ata_sas_port_init - Initialize a SATA device
4895 * @ap: SATA port to initialize
4898 * PCI/etc. bus probe sem.
4901 * Zero on success, non-zero on error.
4904 int ata_sas_port_init(struct ata_port *ap)
4906 int rc = ap->ops->port_start(ap);
4910 ap->print_id = atomic_inc_return(&ata_print_id);
4913 EXPORT_SYMBOL_GPL(ata_sas_port_init);
4916 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
4917 * @ap: SATA port to destroy
4921 void ata_sas_port_destroy(struct ata_port *ap)
4923 if (ap->ops->port_stop)
4924 ap->ops->port_stop(ap);
4927 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
4930 * ata_sas_slave_configure - Default slave_config routine for libata devices
4931 * @sdev: SCSI device to configure
4932 * @ap: ATA port to which SCSI device is attached
4938 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
4940 ata_scsi_sdev_config(sdev);
4941 ata_scsi_dev_config(sdev, ap->link.device);
4944 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
4947 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
4948 * @cmd: SCSI command to be sent
4949 * @ap: ATA port to which the command is being sent
4952 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4956 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
4960 ata_scsi_dump_cdb(ap, cmd);
4962 if (likely(ata_dev_enabled(ap->link.device)))
4963 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
4965 cmd->result = (DID_BAD_TARGET << 16);
4966 cmd->scsi_done(cmd);
4970 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
4972 int ata_sas_allocate_tag(struct ata_port *ap)
4974 unsigned int max_queue = ap->host->n_tags;
4975 unsigned int i, tag;
4977 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) {
4978 tag = tag < max_queue ? tag : 0;
4980 /* the last tag is reserved for internal command. */
4981 if (tag == ATA_TAG_INTERNAL)
4984 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) {
4985 ap->sas_last_tag = tag;
4992 void ata_sas_free_tag(unsigned int tag, struct ata_port *ap)
4994 clear_bit(tag, &ap->sas_tag_allocated);