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;
177 unsigned long flags, now;
178 unsigned int uninitialized_var(msecs);
181 ap = ata_shost_to_port(sdev->host);
183 spin_lock_irqsave(ap->lock, flags);
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 static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
275 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
277 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
281 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
282 const char *buf, size_t count)
284 struct Scsi_Host *shost = class_to_shost(dev);
285 struct ata_port *ap = ata_shost_to_port(shost);
286 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
287 return ap->ops->em_store(ap, buf, count);
292 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
295 struct Scsi_Host *shost = class_to_shost(dev);
296 struct ata_port *ap = ata_shost_to_port(shost);
298 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
299 return ap->ops->em_show(ap, buf);
302 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
303 ata_scsi_em_message_show, ata_scsi_em_message_store);
304 EXPORT_SYMBOL_GPL(dev_attr_em_message);
307 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
310 struct Scsi_Host *shost = class_to_shost(dev);
311 struct ata_port *ap = ata_shost_to_port(shost);
313 return snprintf(buf, 23, "%d\n", ap->em_message_type);
315 DEVICE_ATTR(em_message_type, S_IRUGO,
316 ata_scsi_em_message_type_show, NULL);
317 EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
320 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
323 struct scsi_device *sdev = to_scsi_device(dev);
324 struct ata_port *ap = ata_shost_to_port(sdev->host);
325 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
327 if (atadev && ap->ops->sw_activity_show &&
328 (ap->flags & ATA_FLAG_SW_ACTIVITY))
329 return ap->ops->sw_activity_show(atadev, buf);
334 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
335 const char *buf, size_t count)
337 struct scsi_device *sdev = to_scsi_device(dev);
338 struct ata_port *ap = ata_shost_to_port(sdev->host);
339 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
340 enum sw_activity val;
343 if (atadev && ap->ops->sw_activity_store &&
344 (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
345 val = simple_strtoul(buf, NULL, 0);
347 case OFF: case BLINK_ON: case BLINK_OFF:
348 rc = ap->ops->sw_activity_store(atadev, val);
357 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
358 ata_scsi_activity_store);
359 EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
361 struct device_attribute *ata_common_sdev_attrs[] = {
362 &dev_attr_unload_heads,
365 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
367 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd)
369 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
370 /* "Invalid field in cbd" */
375 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
376 * @sdev: SCSI device for which BIOS geometry is to be determined
377 * @bdev: block device associated with @sdev
378 * @capacity: capacity of SCSI device
379 * @geom: location to which geometry will be output
381 * Generic bios head/sector/cylinder calculator
382 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
383 * mapping. Some situations may arise where the disk is not
384 * bootable if this is not used.
387 * Defined by the SCSI layer. We don't really care.
392 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
393 sector_t capacity, int geom[])
397 sector_div(capacity, 255*63);
404 * ata_scsi_unlock_native_capacity - unlock native capacity
405 * @sdev: SCSI device to adjust device capacity for
407 * This function is called if a partition on @sdev extends beyond
408 * the end of the device. It requests EH to unlock HPA.
411 * Defined by the SCSI layer. Might sleep.
413 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
415 struct ata_port *ap = ata_shost_to_port(sdev->host);
416 struct ata_device *dev;
419 spin_lock_irqsave(ap->lock, flags);
421 dev = ata_scsi_find_dev(ap, sdev);
422 if (dev && dev->n_sectors < dev->n_native_sectors) {
423 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
424 dev->link->eh_info.action |= ATA_EH_RESET;
425 ata_port_schedule_eh(ap);
428 spin_unlock_irqrestore(ap->lock, flags);
429 ata_port_wait_eh(ap);
433 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
435 * @sdev: SCSI device to get identify data for
436 * @arg: User buffer area for identify data
439 * Defined by the SCSI layer. We don't really care.
442 * Zero on success, negative errno on error.
444 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
447 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
448 u16 __user *dst = arg;
454 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
457 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
458 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
461 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
462 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
465 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
466 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
473 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
474 * @scsidev: Device to which we are issuing command
475 * @arg: User provided data for issuing command
478 * Defined by the SCSI layer. We don't really care.
481 * Zero on success, negative errno on error.
483 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
486 u8 scsi_cmd[MAX_COMMAND_SIZE];
487 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
489 enum dma_data_direction data_dir;
495 if (copy_from_user(args, arg, sizeof(args)))
498 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
502 memset(scsi_cmd, 0, sizeof(scsi_cmd));
505 argsize = ATA_SECT_SIZE * args[3];
506 argbuf = kmalloc(argsize, GFP_KERNEL);
507 if (argbuf == NULL) {
512 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
513 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
514 block count in sector count field */
515 data_dir = DMA_FROM_DEVICE;
517 scsi_cmd[1] = (3 << 1); /* Non-data */
518 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
522 scsi_cmd[0] = ATA_16;
524 scsi_cmd[4] = args[2];
525 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
526 scsi_cmd[6] = args[3];
527 scsi_cmd[8] = args[1];
531 scsi_cmd[6] = args[1];
533 scsi_cmd[14] = args[0];
535 /* Good values for timeout and retries? Values below
536 from scsi_ioctl_send_command() for default case... */
537 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
538 sensebuf, (10*HZ), 5, 0, NULL);
540 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
541 u8 *desc = sensebuf + 8;
542 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
544 /* If we set cc then ATA pass-through will cause a
545 * check condition even if no error. Filter that. */
546 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
547 struct scsi_sense_hdr sshdr;
548 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
550 if (sshdr.sense_key == RECOVERED_ERROR &&
551 sshdr.asc == 0 && sshdr.ascq == 0x1d)
552 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
555 /* Send userspace a few ATA registers (same as drivers/ide) */
556 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
557 desc[0] == 0x09) { /* code is "ATA Descriptor" */
558 args[0] = desc[13]; /* status */
559 args[1] = desc[3]; /* error */
560 args[2] = desc[5]; /* sector count (0:7) */
561 if (copy_to_user(arg, args, sizeof(args)))
573 && copy_to_user(arg + sizeof(args), argbuf, argsize))
582 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
583 * @scsidev: Device to which we are issuing command
584 * @arg: User provided data for issuing command
587 * Defined by the SCSI layer. We don't really care.
590 * Zero on success, negative errno on error.
592 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
595 u8 scsi_cmd[MAX_COMMAND_SIZE];
596 u8 args[7], *sensebuf = NULL;
602 if (copy_from_user(args, arg, sizeof(args)))
605 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
609 memset(scsi_cmd, 0, sizeof(scsi_cmd));
610 scsi_cmd[0] = ATA_16;
611 scsi_cmd[1] = (3 << 1); /* Non-data */
612 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
613 scsi_cmd[4] = args[1];
614 scsi_cmd[6] = args[2];
615 scsi_cmd[8] = args[3];
616 scsi_cmd[10] = args[4];
617 scsi_cmd[12] = args[5];
618 scsi_cmd[13] = args[6] & 0x4f;
619 scsi_cmd[14] = args[0];
621 /* Good values for timeout and retries? Values below
622 from scsi_ioctl_send_command() for default case... */
623 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
624 sensebuf, (10*HZ), 5, 0, NULL);
626 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
627 u8 *desc = sensebuf + 8;
628 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
630 /* If we set cc then ATA pass-through will cause a
631 * check condition even if no error. Filter that. */
632 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
633 struct scsi_sense_hdr sshdr;
634 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
636 if (sshdr.sense_key == RECOVERED_ERROR &&
637 sshdr.asc == 0 && sshdr.ascq == 0x1d)
638 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
641 /* Send userspace ATA registers */
642 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
643 desc[0] == 0x09) {/* code is "ATA Descriptor" */
644 args[0] = desc[13]; /* status */
645 args[1] = desc[3]; /* error */
646 args[2] = desc[5]; /* sector count (0:7) */
647 args[3] = desc[7]; /* lbal */
648 args[4] = desc[9]; /* lbam */
649 args[5] = desc[11]; /* lbah */
650 args[6] = desc[12]; /* select */
651 if (copy_to_user(arg, args, sizeof(args)))
666 static int ata_ioc32(struct ata_port *ap)
668 if (ap->flags & ATA_FLAG_PIO_DMA)
670 if (ap->pflags & ATA_PFLAG_PIO32)
675 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
676 int cmd, void __user *arg)
684 spin_lock_irqsave(ap->lock, flags);
686 spin_unlock_irqrestore(ap->lock, flags);
687 return put_user(val, (unsigned long __user *)arg);
690 val = (unsigned long) arg;
692 spin_lock_irqsave(ap->lock, flags);
693 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
695 ap->pflags |= ATA_PFLAG_PIO32;
697 ap->pflags &= ~ATA_PFLAG_PIO32;
699 if (val != ata_ioc32(ap))
702 spin_unlock_irqrestore(ap->lock, flags);
705 case HDIO_GET_IDENTITY:
706 return ata_get_identity(ap, scsidev, arg);
709 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
711 return ata_cmd_ioctl(scsidev, arg);
713 case HDIO_DRIVE_TASK:
714 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
716 return ata_task_ioctl(scsidev, arg);
725 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
727 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
729 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
732 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
735 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
736 * @dev: ATA device to which the new command is attached
737 * @cmd: SCSI command that originated this ATA command
739 * Obtain a reference to an unused ata_queued_cmd structure,
740 * which is the basic libata structure representing a single
741 * ATA command sent to the hardware.
743 * If a command was available, fill in the SCSI-specific
744 * portions of the structure with information on the
748 * spin_lock_irqsave(host lock)
751 * Command allocated, or %NULL if none available.
753 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
754 struct scsi_cmnd *cmd)
756 struct ata_queued_cmd *qc;
758 qc = ata_qc_new_init(dev, cmd->request->tag);
761 qc->scsidone = cmd->scsi_done;
763 qc->sg = scsi_sglist(cmd);
764 qc->n_elem = scsi_sg_count(cmd);
766 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
773 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
775 struct scsi_cmnd *scmd = qc->scsicmd;
777 qc->extrabytes = scmd->request->extra_len;
778 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
782 * ata_dump_status - user friendly display of error info
783 * @id: id of the port in question
784 * @tf: ptr to filled out taskfile
786 * Decode and dump the ATA error/status registers for the user so
787 * that they have some idea what really happened at the non
788 * make-believe layer.
791 * inherited from caller
793 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
795 u8 stat = tf->command, err = tf->feature;
797 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
798 if (stat & ATA_BUSY) {
799 printk("Busy }\n"); /* Data is not valid in this case */
801 if (stat & ATA_DRDY) printk("DriveReady ");
802 if (stat & ATA_DF) printk("DeviceFault ");
803 if (stat & ATA_DSC) printk("SeekComplete ");
804 if (stat & ATA_DRQ) printk("DataRequest ");
805 if (stat & ATA_CORR) printk("CorrectedError ");
806 if (stat & ATA_SENSE) printk("Sense ");
807 if (stat & ATA_ERR) printk("Error ");
811 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
812 if (err & ATA_ABORTED) printk("DriveStatusError ");
813 if (err & ATA_ICRC) {
814 if (err & ATA_ABORTED)
816 else printk("Sector ");
818 if (err & ATA_UNC) printk("UncorrectableError ");
819 if (err & ATA_IDNF) printk("SectorIdNotFound ");
820 if (err & ATA_TRK0NF) printk("TrackZeroNotFound ");
821 if (err & ATA_AMNF) printk("AddrMarkNotFound ");
828 * ata_to_sense_error - convert ATA error to SCSI error
829 * @id: ATA device number
830 * @drv_stat: value contained in ATA status register
831 * @drv_err: value contained in ATA error register
832 * @sk: the sense key we'll fill out
833 * @asc: the additional sense code we'll fill out
834 * @ascq: the additional sense code qualifier we'll fill out
835 * @verbose: be verbose
837 * Converts an ATA error into a SCSI error. Fill out pointers to
838 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
839 * format sense blocks.
842 * spin_lock_irqsave(host lock)
844 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
845 u8 *asc, u8 *ascq, int verbose)
849 /* Based on the 3ware driver translation table */
850 static const unsigned char sense_table[][4] = {
852 {0xd1, ABORTED_COMMAND, 0x00, 0x00},
853 // Device busy Aborted command
855 {0xd0, ABORTED_COMMAND, 0x00, 0x00},
856 // Device busy Aborted command
858 {0x61, HARDWARE_ERROR, 0x00, 0x00},
859 // Device fault Hardware error
860 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
861 {0x84, ABORTED_COMMAND, 0x47, 0x00},
862 // Data CRC error SCSI parity error
863 /* MC|ID|ABRT|TRK0|MARK */
864 {0x37, NOT_READY, 0x04, 0x00},
865 // Unit offline Not ready
867 {0x09, NOT_READY, 0x04, 0x00},
868 // Unrecovered disk error Not ready
869 /* Bad address mark */
870 {0x01, MEDIUM_ERROR, 0x13, 0x00},
871 // Address mark not found for data field
872 /* TRK0 - Track 0 not found */
873 {0x02, HARDWARE_ERROR, 0x00, 0x00},
875 /* Abort: 0x04 is not translated here, see below */
876 /* Media change request */
877 {0x08, NOT_READY, 0x04, 0x00},
878 // FIXME: faking offline
879 /* SRV/IDNF - ID not found */
880 {0x10, ILLEGAL_REQUEST, 0x21, 0x00},
881 // Logical address out of range
882 /* MC - Media Changed */
883 {0x20, UNIT_ATTENTION, 0x28, 0x00},
884 // Not ready to ready change, medium may have changed
885 /* ECC - Uncorrectable ECC error */
886 {0x40, MEDIUM_ERROR, 0x11, 0x04},
887 // Unrecovered read error
888 /* BBD - block marked bad */
889 {0x80, MEDIUM_ERROR, 0x11, 0x04},
890 // Block marked bad Medium error, unrecovered read error
891 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
893 static const unsigned char stat_table[][4] = {
894 /* Must be first because BUSY means no other bits valid */
895 {0x80, ABORTED_COMMAND, 0x47, 0x00},
896 // Busy, fake parity for now
897 {0x40, ILLEGAL_REQUEST, 0x21, 0x04},
898 // Device ready, unaligned write command
899 {0x20, HARDWARE_ERROR, 0x44, 0x00},
900 // Device fault, internal target failure
901 {0x08, ABORTED_COMMAND, 0x47, 0x00},
902 // Timed out in xfer, fake parity for now
903 {0x04, RECOVERED_ERROR, 0x11, 0x00},
904 // Recovered ECC error Medium error, recovered
905 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
909 * Is this an error we can process/parse
911 if (drv_stat & ATA_BUSY) {
912 drv_err = 0; /* Ignore the err bits, they're invalid */
916 /* Look for drv_err */
917 for (i = 0; sense_table[i][0] != 0xFF; i++) {
918 /* Look for best matches first */
919 if ((sense_table[i][0] & drv_err) ==
921 *sk = sense_table[i][1];
922 *asc = sense_table[i][2];
923 *ascq = sense_table[i][3];
930 * Fall back to interpreting status bits. Note that if the drv_err
931 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
932 * is not descriptive enough.
934 for (i = 0; stat_table[i][0] != 0xFF; i++) {
935 if (stat_table[i][0] & drv_stat) {
936 *sk = stat_table[i][1];
937 *asc = stat_table[i][2];
938 *ascq = stat_table[i][3];
944 * We need a sensible error return here, which is tricky, and one
945 * that won't cause people to do things like return a disk wrongly.
947 *sk = ABORTED_COMMAND;
953 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
954 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
955 id, drv_stat, drv_err, *sk, *asc, *ascq);
960 * ata_gen_passthru_sense - Generate check condition sense block.
961 * @qc: Command that completed.
963 * This function is specific to the ATA descriptor format sense
964 * block specified for the ATA pass through commands. Regardless
965 * of whether the command errored or not, return a sense
966 * block. Copy all controller registers into the sense
967 * block. If there was no error, we get the request from an ATA
968 * passthrough command, so we use the following sense data:
969 * sk = RECOVERED ERROR
970 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
976 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
978 struct scsi_cmnd *cmd = qc->scsicmd;
979 struct ata_taskfile *tf = &qc->result_tf;
980 unsigned char *sb = cmd->sense_buffer;
981 unsigned char *desc = sb + 8;
982 int verbose = qc->ap->ops->error_handler == NULL;
984 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
986 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
989 * Use ata_to_sense_error() to map status register bits
990 * onto sense key, asc & ascq.
993 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
994 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
995 &sb[1], &sb[2], &sb[3], verbose);
998 sb[1] = RECOVERED_ERROR;
1004 * Sense data is current and format is descriptor.
1010 /* set length of additional sense data */
1015 * Copy registers into sense buffer.
1018 desc[3] = tf->feature; /* == error reg */
1019 desc[5] = tf->nsect;
1022 desc[11] = tf->lbah;
1023 desc[12] = tf->device;
1024 desc[13] = tf->command; /* == status reg */
1027 * Fill in Extend bit, and the high order bytes
1030 if (tf->flags & ATA_TFLAG_LBA48) {
1032 desc[4] = tf->hob_nsect;
1033 desc[6] = tf->hob_lbal;
1034 desc[8] = tf->hob_lbam;
1035 desc[10] = tf->hob_lbah;
1040 * ata_gen_ata_sense - generate a SCSI fixed sense block
1041 * @qc: Command that we are erroring out
1043 * Generate sense block for a failed ATA command @qc. Descriptor
1044 * format is used to accommodate LBA48 block address.
1049 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1051 struct ata_device *dev = qc->dev;
1052 struct scsi_cmnd *cmd = qc->scsicmd;
1053 struct ata_taskfile *tf = &qc->result_tf;
1054 unsigned char *sb = cmd->sense_buffer;
1055 unsigned char *desc = sb + 8;
1056 int verbose = qc->ap->ops->error_handler == NULL;
1059 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1061 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1063 /* sense data is current and format is descriptor */
1066 /* Use ata_to_sense_error() to map status register bits
1067 * onto sense key, asc & ascq.
1070 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1071 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1072 &sb[1], &sb[2], &sb[3], verbose);
1076 block = ata_tf_read_block(&qc->result_tf, dev);
1078 /* information sense data descriptor */
1083 desc[2] |= 0x80; /* valid */
1084 desc[6] = block >> 40;
1085 desc[7] = block >> 32;
1086 desc[8] = block >> 24;
1087 desc[9] = block >> 16;
1088 desc[10] = block >> 8;
1092 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1094 sdev->use_10_for_rw = 1;
1095 sdev->use_10_for_ms = 1;
1096 sdev->no_report_opcodes = 1;
1097 sdev->no_write_same = 1;
1099 /* Schedule policy is determined by ->qc_defer() callback and
1100 * it needs to see every deferred qc. Set dev_blocked to 1 to
1101 * prevent SCSI midlayer from automatically deferring
1104 sdev->max_device_blocked = 1;
1108 * atapi_drain_needed - Check whether data transfer may overflow
1109 * @rq: request to be checked
1111 * ATAPI commands which transfer variable length data to host
1112 * might overflow due to application error or hardare bug. This
1113 * function checks whether overflow should be drained and ignored
1120 * 1 if ; otherwise, 0.
1122 static int atapi_drain_needed(struct request *rq)
1124 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
1127 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
1130 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1133 static int ata_scsi_dev_config(struct scsi_device *sdev,
1134 struct ata_device *dev)
1136 struct request_queue *q = sdev->request_queue;
1138 if (!ata_id_has_unload(dev->id))
1139 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1141 /* configure max sectors */
1142 blk_queue_max_hw_sectors(q, dev->max_sectors);
1144 if (dev->class == ATA_DEV_ATAPI) {
1147 sdev->sector_size = ATA_SECT_SIZE;
1149 /* set DMA padding */
1150 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1152 /* configure draining */
1153 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1155 ata_dev_err(dev, "drain buffer allocation failed\n");
1159 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1161 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1162 sdev->manage_start_stop = 1;
1166 * ata_pio_sectors() expects buffer for each sector to not cross
1167 * page boundary. Enforce it by requiring buffers to be sector
1168 * aligned, which works iff sector_size is not larger than
1169 * PAGE_SIZE. ATAPI devices also need the alignment as
1170 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1172 if (sdev->sector_size > PAGE_SIZE)
1174 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1177 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1179 if (dev->flags & ATA_DFLAG_AN)
1180 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1182 if (dev->flags & ATA_DFLAG_NCQ) {
1185 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1186 depth = min(ATA_MAX_QUEUE - 1, depth);
1187 scsi_change_queue_depth(sdev, depth);
1190 blk_queue_flush_queueable(q, false);
1197 * ata_scsi_slave_config - Set SCSI device attributes
1198 * @sdev: SCSI device to examine
1200 * This is called before we actually start reading
1201 * and writing to the device, to configure certain
1202 * SCSI mid-layer behaviors.
1205 * Defined by SCSI layer. We don't really care.
1208 int ata_scsi_slave_config(struct scsi_device *sdev)
1210 struct ata_port *ap = ata_shost_to_port(sdev->host);
1211 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1214 ata_scsi_sdev_config(sdev);
1217 rc = ata_scsi_dev_config(sdev, dev);
1223 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1224 * @sdev: SCSI device to be destroyed
1226 * @sdev is about to be destroyed for hot/warm unplugging. If
1227 * this unplugging was initiated by libata as indicated by NULL
1228 * dev->sdev, this function doesn't have to do anything.
1229 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1230 * Clear dev->sdev, schedule the device for ATA detach and invoke
1234 * Defined by SCSI layer. We don't really care.
1236 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1238 struct ata_port *ap = ata_shost_to_port(sdev->host);
1239 struct request_queue *q = sdev->request_queue;
1240 unsigned long flags;
1241 struct ata_device *dev;
1243 if (!ap->ops->error_handler)
1246 spin_lock_irqsave(ap->lock, flags);
1247 dev = __ata_scsi_find_dev(ap, sdev);
1248 if (dev && dev->sdev) {
1249 /* SCSI device already in CANCEL state, no need to offline it */
1251 dev->flags |= ATA_DFLAG_DETACH;
1252 ata_port_schedule_eh(ap);
1254 spin_unlock_irqrestore(ap->lock, flags);
1256 kfree(q->dma_drain_buffer);
1257 q->dma_drain_buffer = NULL;
1258 q->dma_drain_size = 0;
1262 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1263 * @ap: ATA port to which the device change the queue depth
1264 * @sdev: SCSI device to configure queue depth for
1265 * @queue_depth: new queue depth
1267 * libsas and libata have different approaches for associating a sdev to
1271 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1274 struct ata_device *dev;
1275 unsigned long flags;
1277 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1278 return sdev->queue_depth;
1280 dev = ata_scsi_find_dev(ap, sdev);
1281 if (!dev || !ata_dev_enabled(dev))
1282 return sdev->queue_depth;
1285 spin_lock_irqsave(ap->lock, flags);
1286 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1287 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1288 dev->flags |= ATA_DFLAG_NCQ_OFF;
1291 spin_unlock_irqrestore(ap->lock, flags);
1293 /* limit and apply queue depth */
1294 queue_depth = min(queue_depth, sdev->host->can_queue);
1295 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1296 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1298 if (sdev->queue_depth == queue_depth)
1301 return scsi_change_queue_depth(sdev, queue_depth);
1305 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1306 * @sdev: SCSI device to configure queue depth for
1307 * @queue_depth: new queue depth
1309 * This is libata standard hostt->change_queue_depth callback.
1310 * SCSI will call into this callback when user tries to set queue
1314 * SCSI layer (we don't care)
1317 * Newly configured queue depth.
1319 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1321 struct ata_port *ap = ata_shost_to_port(sdev->host);
1323 return __ata_change_queue_depth(ap, sdev, queue_depth);
1327 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1328 * @qc: Storage for translated ATA taskfile
1330 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1331 * (to start). Perhaps these commands should be preceded by
1332 * CHECK POWER MODE to see what power mode the device is already in.
1333 * [See SAT revision 5 at www.t10.org]
1336 * spin_lock_irqsave(host lock)
1339 * Zero on success, non-zero on error.
1341 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1343 struct scsi_cmnd *scmd = qc->scsicmd;
1344 struct ata_taskfile *tf = &qc->tf;
1345 const u8 *cdb = scmd->cmnd;
1347 if (scmd->cmd_len < 5)
1350 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1351 tf->protocol = ATA_PROT_NODATA;
1353 ; /* ignore IMMED bit, violates sat-r05 */
1356 goto invalid_fld; /* LOEJ bit set not supported */
1357 if (((cdb[4] >> 4) & 0xf) != 0)
1358 goto invalid_fld; /* power conditions not supported */
1361 tf->nsect = 1; /* 1 sector, lba=0 */
1363 if (qc->dev->flags & ATA_DFLAG_LBA) {
1364 tf->flags |= ATA_TFLAG_LBA;
1369 tf->device |= ATA_LBA;
1372 tf->lbal = 0x1; /* sect */
1373 tf->lbam = 0x0; /* cyl low */
1374 tf->lbah = 0x0; /* cyl high */
1377 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1379 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1380 * or S5) causing some drives to spin up and down again.
1382 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1383 system_state == SYSTEM_POWER_OFF)
1386 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1387 system_entering_hibernation())
1390 /* Issue ATA STANDBY IMMEDIATE command */
1391 tf->command = ATA_CMD_STANDBYNOW1;
1395 * Standby and Idle condition timers could be implemented but that
1396 * would require libata to implement the Power condition mode page
1397 * and allow the user to change it. Changing mode pages requires
1398 * MODE SELECT to be implemented.
1404 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1405 /* "Invalid field in cbd" */
1408 scmd->result = SAM_STAT_GOOD;
1414 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1415 * @qc: Storage for translated ATA taskfile
1417 * Sets up an ATA taskfile to issue FLUSH CACHE or
1421 * spin_lock_irqsave(host lock)
1424 * Zero on success, non-zero on error.
1426 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1428 struct ata_taskfile *tf = &qc->tf;
1430 tf->flags |= ATA_TFLAG_DEVICE;
1431 tf->protocol = ATA_PROT_NODATA;
1433 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1434 tf->command = ATA_CMD_FLUSH_EXT;
1436 tf->command = ATA_CMD_FLUSH;
1438 /* flush is critical for IO integrity, consider it an IO command */
1439 qc->flags |= ATA_QCFLAG_IO;
1445 * scsi_6_lba_len - Get LBA and transfer length
1446 * @cdb: SCSI command to translate
1448 * Calculate LBA and transfer length for 6-byte commands.
1452 * @plen: the transfer length
1454 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1459 VPRINTK("six-byte command\n");
1461 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1462 lba |= ((u64)cdb[2]) << 8;
1463 lba |= ((u64)cdb[3]);
1472 * scsi_10_lba_len - Get LBA and transfer length
1473 * @cdb: SCSI command to translate
1475 * Calculate LBA and transfer length for 10-byte commands.
1479 * @plen: the transfer length
1481 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1486 VPRINTK("ten-byte command\n");
1488 lba |= ((u64)cdb[2]) << 24;
1489 lba |= ((u64)cdb[3]) << 16;
1490 lba |= ((u64)cdb[4]) << 8;
1491 lba |= ((u64)cdb[5]);
1493 len |= ((u32)cdb[7]) << 8;
1494 len |= ((u32)cdb[8]);
1501 * scsi_16_lba_len - Get LBA and transfer length
1502 * @cdb: SCSI command to translate
1504 * Calculate LBA and transfer length for 16-byte commands.
1508 * @plen: the transfer length
1510 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1515 VPRINTK("sixteen-byte command\n");
1517 lba |= ((u64)cdb[2]) << 56;
1518 lba |= ((u64)cdb[3]) << 48;
1519 lba |= ((u64)cdb[4]) << 40;
1520 lba |= ((u64)cdb[5]) << 32;
1521 lba |= ((u64)cdb[6]) << 24;
1522 lba |= ((u64)cdb[7]) << 16;
1523 lba |= ((u64)cdb[8]) << 8;
1524 lba |= ((u64)cdb[9]);
1526 len |= ((u32)cdb[10]) << 24;
1527 len |= ((u32)cdb[11]) << 16;
1528 len |= ((u32)cdb[12]) << 8;
1529 len |= ((u32)cdb[13]);
1536 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1537 * @qc: Storage for translated ATA taskfile
1539 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1542 * spin_lock_irqsave(host lock)
1545 * Zero on success, non-zero on error.
1547 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1549 struct scsi_cmnd *scmd = qc->scsicmd;
1550 struct ata_taskfile *tf = &qc->tf;
1551 struct ata_device *dev = qc->dev;
1552 u64 dev_sectors = qc->dev->n_sectors;
1553 const u8 *cdb = scmd->cmnd;
1557 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1558 tf->protocol = ATA_PROT_NODATA;
1560 if (cdb[0] == VERIFY) {
1561 if (scmd->cmd_len < 10)
1563 scsi_10_lba_len(cdb, &block, &n_block);
1564 } else if (cdb[0] == VERIFY_16) {
1565 if (scmd->cmd_len < 16)
1567 scsi_16_lba_len(cdb, &block, &n_block);
1573 if (block >= dev_sectors)
1575 if ((block + n_block) > dev_sectors)
1578 if (dev->flags & ATA_DFLAG_LBA) {
1579 tf->flags |= ATA_TFLAG_LBA;
1581 if (lba_28_ok(block, n_block)) {
1583 tf->command = ATA_CMD_VERIFY;
1584 tf->device |= (block >> 24) & 0xf;
1585 } else if (lba_48_ok(block, n_block)) {
1586 if (!(dev->flags & ATA_DFLAG_LBA48))
1590 tf->flags |= ATA_TFLAG_LBA48;
1591 tf->command = ATA_CMD_VERIFY_EXT;
1593 tf->hob_nsect = (n_block >> 8) & 0xff;
1595 tf->hob_lbah = (block >> 40) & 0xff;
1596 tf->hob_lbam = (block >> 32) & 0xff;
1597 tf->hob_lbal = (block >> 24) & 0xff;
1599 /* request too large even for LBA48 */
1602 tf->nsect = n_block & 0xff;
1604 tf->lbah = (block >> 16) & 0xff;
1605 tf->lbam = (block >> 8) & 0xff;
1606 tf->lbal = block & 0xff;
1608 tf->device |= ATA_LBA;
1611 u32 sect, head, cyl, track;
1613 if (!lba_28_ok(block, n_block))
1616 /* Convert LBA to CHS */
1617 track = (u32)block / dev->sectors;
1618 cyl = track / dev->heads;
1619 head = track % dev->heads;
1620 sect = (u32)block % dev->sectors + 1;
1622 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1623 (u32)block, track, cyl, head, sect);
1625 /* Check whether the converted CHS can fit.
1629 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1632 tf->command = ATA_CMD_VERIFY;
1633 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1636 tf->lbah = cyl >> 8;
1643 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1644 /* "Invalid field in cbd" */
1648 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1649 /* "Logical Block Address out of range" */
1653 scmd->result = SAM_STAT_GOOD;
1657 static bool ata_check_nblocks(struct scsi_cmnd *scmd, u32 n_blocks)
1659 struct request *rq = scmd->request;
1662 if (!blk_rq_is_passthrough(rq))
1665 req_blocks = blk_rq_bytes(rq) / scmd->device->sector_size;
1666 if (n_blocks > req_blocks)
1673 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1674 * @qc: Storage for translated ATA taskfile
1676 * Converts any of six SCSI read/write commands into the
1677 * ATA counterpart, including starting sector (LBA),
1678 * sector count, and taking into account the device's LBA48
1681 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1682 * %WRITE_16 are currently supported.
1685 * spin_lock_irqsave(host lock)
1688 * Zero on success, non-zero on error.
1690 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1692 struct scsi_cmnd *scmd = qc->scsicmd;
1693 const u8 *cdb = scmd->cmnd;
1694 unsigned int tf_flags = 0;
1699 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1700 tf_flags |= ATA_TFLAG_WRITE;
1702 /* Calculate the SCSI LBA, transfer length and FUA. */
1706 if (unlikely(scmd->cmd_len < 10))
1708 scsi_10_lba_len(cdb, &block, &n_block);
1709 if (cdb[1] & (1 << 3))
1710 tf_flags |= ATA_TFLAG_FUA;
1711 if (!ata_check_nblocks(scmd, n_block))
1716 if (unlikely(scmd->cmd_len < 6))
1718 scsi_6_lba_len(cdb, &block, &n_block);
1720 /* for 6-byte r/w commands, transfer length 0
1721 * means 256 blocks of data, not 0 block.
1725 if (!ata_check_nblocks(scmd, n_block))
1730 if (unlikely(scmd->cmd_len < 16))
1732 scsi_16_lba_len(cdb, &block, &n_block);
1733 if (cdb[1] & (1 << 3))
1734 tf_flags |= ATA_TFLAG_FUA;
1735 if (!ata_check_nblocks(scmd, n_block))
1739 DPRINTK("no-byte command\n");
1743 /* Check and compose ATA command */
1745 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1746 * length 0 means transfer 0 block of data.
1747 * However, for ATA R/W commands, sector count 0 means
1748 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1750 * WARNING: one or two older ATA drives treat 0 as 0...
1754 qc->flags |= ATA_QCFLAG_IO;
1755 qc->nbytes = n_block * scmd->device->sector_size;
1757 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1759 if (likely(rc == 0))
1764 /* treat all other errors as -EINVAL, fall through */
1766 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1767 /* "Invalid field in cbd" */
1771 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1772 /* "Logical Block Address out of range" */
1776 scmd->result = SAM_STAT_GOOD;
1780 static void ata_qc_done(struct ata_queued_cmd *qc)
1782 struct scsi_cmnd *cmd = qc->scsicmd;
1783 void (*done)(struct scsi_cmnd *) = qc->scsidone;
1789 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1791 struct ata_port *ap = qc->ap;
1792 struct scsi_cmnd *cmd = qc->scsicmd;
1793 u8 *cdb = cmd->cmnd;
1794 int need_sense = (qc->err_mask != 0);
1796 /* For ATA pass thru (SAT) commands, generate a sense block if
1797 * user mandated it or if there's an error. Note that if we
1798 * generate because the user forced us to [CK_COND =1], a check
1799 * condition is generated and the ATA register values are returned
1800 * whether the command completed successfully or not. If there
1801 * was no error, we use the following sense data:
1802 * sk = RECOVERED ERROR
1803 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1805 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1806 ((cdb[2] & 0x20) || need_sense))
1807 ata_gen_passthru_sense(qc);
1808 else if (need_sense)
1809 ata_gen_ata_sense(qc);
1811 cmd->result = SAM_STAT_GOOD;
1813 if (need_sense && !ap->ops->error_handler)
1814 ata_dump_status(ap->print_id, &qc->result_tf);
1820 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1821 * @dev: ATA device to which the command is addressed
1822 * @cmd: SCSI command to execute
1823 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1825 * Our ->queuecommand() function has decided that the SCSI
1826 * command issued can be directly translated into an ATA
1827 * command, rather than handled internally.
1829 * This function sets up an ata_queued_cmd structure for the
1830 * SCSI command, and sends that ata_queued_cmd to the hardware.
1832 * The xlat_func argument (actor) returns 0 if ready to execute
1833 * ATA command, else 1 to finish translation. If 1 is returned
1834 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1835 * to be set reflecting an error condition or clean (early)
1839 * spin_lock_irqsave(host lock)
1842 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1843 * needs to be deferred.
1845 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1846 ata_xlat_func_t xlat_func)
1848 struct ata_port *ap = dev->link->ap;
1849 struct ata_queued_cmd *qc;
1854 qc = ata_scsi_qc_new(dev, cmd);
1858 /* data is present; dma-map it */
1859 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1860 cmd->sc_data_direction == DMA_TO_DEVICE) {
1861 if (unlikely(scsi_bufflen(cmd) < 1)) {
1862 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
1866 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1868 qc->dma_dir = cmd->sc_data_direction;
1871 qc->complete_fn = ata_scsi_qc_complete;
1876 if (ap->ops->qc_defer) {
1877 if ((rc = ap->ops->qc_defer(qc)))
1881 /* select device, send command to hardware */
1889 cmd->scsi_done(cmd);
1890 DPRINTK("EXIT - early finish (good or error)\n");
1895 cmd->result = (DID_ERROR << 16);
1896 cmd->scsi_done(cmd);
1898 DPRINTK("EXIT - internal\n");
1903 DPRINTK("EXIT - defer\n");
1904 if (rc == ATA_DEFER_LINK)
1905 return SCSI_MLQUEUE_DEVICE_BUSY;
1907 return SCSI_MLQUEUE_HOST_BUSY;
1911 * ata_scsi_rbuf_get - Map response buffer.
1912 * @cmd: SCSI command containing buffer to be mapped.
1913 * @flags: unsigned long variable to store irq enable status
1914 * @copy_in: copy in from user buffer
1916 * Prepare buffer for simulated SCSI commands.
1919 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1922 * Pointer to response buffer.
1924 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1925 unsigned long *flags)
1927 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1929 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1931 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1932 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1933 return ata_scsi_rbuf;
1937 * ata_scsi_rbuf_put - Unmap response buffer.
1938 * @cmd: SCSI command containing buffer to be unmapped.
1939 * @copy_out: copy out result
1940 * @flags: @flags passed to ata_scsi_rbuf_get()
1942 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1943 * @copy_back is true.
1946 * Unlocks ata_scsi_rbuf_lock.
1948 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1949 unsigned long *flags)
1952 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1953 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1954 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1958 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1959 * @args: device IDENTIFY data / SCSI command of interest.
1960 * @actor: Callback hook for desired SCSI command simulator
1962 * Takes care of the hard work of simulating a SCSI command...
1963 * Mapping the response buffer, calling the command's handler,
1964 * and handling the handler's return value. This return value
1965 * indicates whether the handler wishes the SCSI command to be
1966 * completed successfully (0), or not (in which case cmd->result
1967 * and sense buffer are assumed to be set).
1970 * spin_lock_irqsave(host lock)
1972 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1973 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1977 struct scsi_cmnd *cmd = args->cmd;
1978 unsigned long flags;
1980 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1981 rc = actor(args, rbuf);
1982 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
1985 cmd->result = SAM_STAT_GOOD;
1990 * ata_scsiop_inq_std - Simulate INQUIRY command
1991 * @args: device IDENTIFY data / SCSI command of interest.
1992 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1994 * Returns standard device identification data associated
1995 * with non-VPD INQUIRY command output.
1998 * spin_lock_irqsave(host lock)
2000 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
2002 const u8 versions[] = {
2004 0x60, /* SAM-3 (no version claimed) */
2007 0x20, /* SBC-2 (no version claimed) */
2010 0x60 /* SPC-3 (no version claimed) */
2012 const u8 versions_zbc[] = {
2014 0xA0, /* SAM-5 (no version claimed) */
2017 0xC0, /* SBC-3 (no version claimed) */
2020 0x60, /* SPC-4 (no version claimed) */
2023 0x20, /* ZBC (no version claimed) */
2029 0x5, /* claim SPC-3 version compatibility */
2036 /* set scsi removable (RMB) bit per ata bit, or if the
2037 * AHCI port says it's external (Hotplug-capable, eSATA).
2039 if (ata_id_removable(args->id) ||
2040 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL))
2043 if (args->dev->class == ATA_DEV_ZAC) {
2045 hdr[2] = 0x6; /* ZBC is defined in SPC-4 */
2048 memcpy(rbuf, hdr, sizeof(hdr));
2049 memcpy(&rbuf[8], "ATA ", 8);
2050 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
2052 /* From SAT, use last 2 words from fw rev unless they are spaces */
2053 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
2054 if (strncmp(&rbuf[32], " ", 4) == 0)
2055 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2057 if (rbuf[32] == 0 || rbuf[32] == ' ')
2058 memcpy(&rbuf[32], "n/a ", 4);
2060 if (args->dev->class == ATA_DEV_ZAC)
2061 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc));
2063 memcpy(rbuf + 58, versions, sizeof(versions));
2069 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2070 * @args: device IDENTIFY data / SCSI command of interest.
2071 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2073 * Returns list of inquiry VPD pages available.
2076 * spin_lock_irqsave(host lock)
2078 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
2080 const u8 pages[] = {
2081 0x00, /* page 0x00, this page */
2082 0x80, /* page 0x80, unit serial no page */
2083 0x83, /* page 0x83, device ident page */
2084 0x89, /* page 0x89, ata info page */
2085 0xb0, /* page 0xb0, block limits page */
2086 0xb1, /* page 0xb1, block device characteristics page */
2087 0xb2, /* page 0xb2, thin provisioning page */
2090 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
2091 memcpy(rbuf + 4, pages, sizeof(pages));
2096 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2097 * @args: device IDENTIFY data / SCSI command of interest.
2098 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2100 * Returns ATA device serial number.
2103 * spin_lock_irqsave(host lock)
2105 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2109 0x80, /* this page code */
2111 ATA_ID_SERNO_LEN, /* page len */
2114 memcpy(rbuf, hdr, sizeof(hdr));
2115 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2116 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2121 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2122 * @args: device IDENTIFY data / SCSI command of interest.
2123 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2125 * Yields two logical unit device identification designators:
2126 * - vendor specific ASCII containing the ATA serial number
2127 * - SAT defined "t10 vendor id based" containing ASCII vendor
2128 * name ("ATA "), model and serial numbers.
2131 * spin_lock_irqsave(host lock)
2133 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2135 const int sat_model_serial_desc_len = 68;
2138 rbuf[1] = 0x83; /* this page code */
2141 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2143 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2145 ata_id_string(args->id, (unsigned char *) rbuf + num,
2146 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2147 num += ATA_ID_SERNO_LEN;
2149 /* SAT defined lu model and serial numbers descriptor */
2150 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2153 rbuf[num + 3] = sat_model_serial_desc_len;
2155 memcpy(rbuf + num, "ATA ", 8);
2157 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2159 num += ATA_ID_PROD_LEN;
2160 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2162 num += ATA_ID_SERNO_LEN;
2164 if (ata_id_has_wwn(args->id)) {
2165 /* SAT defined lu world wide name */
2166 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2169 rbuf[num + 3] = ATA_ID_WWN_LEN;
2171 ata_id_string(args->id, (unsigned char *) rbuf + num,
2172 ATA_ID_WWN, ATA_ID_WWN_LEN);
2173 num += ATA_ID_WWN_LEN;
2175 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2180 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2181 * @args: device IDENTIFY data / SCSI command of interest.
2182 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2184 * Yields SAT-specified ATA VPD page.
2187 * spin_lock_irqsave(host lock)
2189 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2191 struct ata_taskfile tf;
2193 memset(&tf, 0, sizeof(tf));
2195 rbuf[1] = 0x89; /* our page code */
2196 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2197 rbuf[3] = (0x238 & 0xff);
2199 memcpy(&rbuf[8], "linux ", 8);
2200 memcpy(&rbuf[16], "libata ", 16);
2201 memcpy(&rbuf[32], DRV_VERSION, 4);
2203 /* we don't store the ATA device signature, so we fake it */
2205 tf.command = ATA_DRDY; /* really, this is Status reg */
2209 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2210 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2212 rbuf[56] = ATA_CMD_ID_ATA;
2214 memcpy(&rbuf[60], &args->id[0], 512);
2218 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2223 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2226 * Optimal transfer length granularity.
2228 * This is always one physical block, but for disks with a smaller
2229 * logical than physical sector size we need to figure out what the
2232 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2233 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2236 * Optimal unmap granularity.
2238 * The ATA spec doesn't even know about a granularity or alignment
2239 * for the TRIM command. We can leave away most of the unmap related
2240 * VPD page entries, but we have specifify a granularity to signal
2241 * that we support some form of unmap - in thise case via WRITE SAME
2242 * with the unmap bit set.
2244 if (ata_id_has_trim(args->id)) {
2245 put_unaligned_be64(65535 * 512 / 8, &rbuf[36]);
2246 put_unaligned_be32(1, &rbuf[28]);
2252 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2254 int form_factor = ata_id_form_factor(args->id);
2255 int media_rotation_rate = ata_id_rotation_rate(args->id);
2259 rbuf[4] = media_rotation_rate >> 8;
2260 rbuf[5] = media_rotation_rate;
2261 rbuf[7] = form_factor;
2266 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2268 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2271 rbuf[5] = 1 << 6; /* TPWS */
2277 * ata_scsiop_noop - Command handler that simply returns success.
2278 * @args: device IDENTIFY data / SCSI command of interest.
2279 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2281 * No operation. Simply returns success to caller, to indicate
2282 * that the caller should successfully complete this SCSI command.
2285 * spin_lock_irqsave(host lock)
2287 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
2294 * modecpy - Prepare response for MODE SENSE
2295 * @dest: output buffer
2296 * @src: data being copied
2297 * @n: length of mode page
2298 * @changeable: whether changeable parameters are requested
2300 * Generate a generic MODE SENSE page for either current or changeable
2306 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2309 memcpy(dest, src, 2);
2310 memset(dest + 2, 0, n - 2);
2312 memcpy(dest, src, n);
2317 * ata_msense_caching - Simulate MODE SENSE caching info page
2318 * @id: device IDENTIFY data
2319 * @buf: output buffer
2320 * @changeable: whether changeable parameters are requested
2322 * Generate a caching info page, which conditionally indicates
2323 * write caching to the SCSI layer, depending on device
2329 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2331 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2332 if (changeable || ata_id_wcache_enabled(id))
2333 buf[2] |= (1 << 2); /* write cache enable */
2334 if (!changeable && !ata_id_rahead_enabled(id))
2335 buf[12] |= (1 << 5); /* disable read ahead */
2336 return sizeof(def_cache_mpage);
2340 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2341 * @buf: output buffer
2342 * @changeable: whether changeable parameters are requested
2344 * Generate a generic MODE SENSE control mode page.
2349 static unsigned int ata_msense_ctl_mode(u8 *buf, bool changeable)
2351 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2352 return sizeof(def_control_mpage);
2356 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2357 * @buf: output buffer
2358 * @changeable: whether changeable parameters are requested
2360 * Generate a generic MODE SENSE r/w error recovery page.
2365 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2367 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2369 return sizeof(def_rw_recovery_mpage);
2373 * We can turn this into a real blacklist if it's needed, for now just
2374 * blacklist any Maxtor BANC1G10 revision firmware
2376 static int ata_dev_supports_fua(u16 *id)
2378 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2382 if (!ata_id_has_fua(id))
2385 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2386 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2388 if (strcmp(model, "Maxtor"))
2390 if (strcmp(fw, "BANC1G10"))
2393 return 0; /* blacklisted */
2397 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2398 * @args: device IDENTIFY data / SCSI command of interest.
2399 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2401 * Simulate MODE SENSE commands. Assume this is invoked for direct
2402 * access devices (e.g. disks) only. There should be no block
2403 * descriptor for other device types.
2406 * spin_lock_irqsave(host lock)
2408 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2410 struct ata_device *dev = args->dev;
2411 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2412 const u8 sat_blk_desc[] = {
2413 0, 0, 0, 0, /* number of blocks: sat unspecified */
2415 0, 0x2, 0x0 /* block length: 512 bytes */
2418 unsigned int ebd, page_control, six_byte;
2423 six_byte = (scsicmd[0] == MODE_SENSE);
2424 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2426 * LLBA bit in msense(10) ignored (compliant)
2429 page_control = scsicmd[2] >> 6;
2430 switch (page_control) {
2431 case 0: /* current */
2432 case 1: /* changeable */
2433 case 2: /* defaults */
2434 break; /* supported */
2436 goto saving_not_supp;
2442 p += 4 + (ebd ? 8 : 0);
2444 p += 8 + (ebd ? 8 : 0);
2446 pg = scsicmd[2] & 0x3f;
2449 * No mode subpages supported (yet) but asking for _all_
2450 * subpages may be valid
2452 if (spg && (spg != ALL_SUB_MPAGES))
2456 case RW_RECOVERY_MPAGE:
2457 p += ata_msense_rw_recovery(p, page_control == 1);
2461 p += ata_msense_caching(args->id, p, page_control == 1);
2465 p += ata_msense_ctl_mode(p, page_control == 1);
2469 p += ata_msense_rw_recovery(p, page_control == 1);
2470 p += ata_msense_caching(args->id, p, page_control == 1);
2471 p += ata_msense_ctl_mode(p, page_control == 1);
2474 default: /* invalid page code */
2479 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2480 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2484 rbuf[0] = p - rbuf - 1;
2487 rbuf[3] = sizeof(sat_blk_desc);
2488 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2491 unsigned int output_len = p - rbuf - 2;
2493 rbuf[0] = output_len >> 8;
2494 rbuf[1] = output_len;
2497 rbuf[7] = sizeof(sat_blk_desc);
2498 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2504 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2505 /* "Invalid field in cbd" */
2509 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2510 /* "Saving parameters not supported" */
2515 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2516 * @args: device IDENTIFY data / SCSI command of interest.
2517 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2519 * Simulate READ CAPACITY commands.
2524 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2526 struct ata_device *dev = args->dev;
2527 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2528 u32 sector_size; /* physical sector size in bytes */
2532 sector_size = ata_id_logical_sector_size(dev->id);
2533 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2534 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2538 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2539 if (last_lba >= 0xffffffffULL)
2540 last_lba = 0xffffffff;
2542 /* sector count, 32-bit */
2543 rbuf[0] = last_lba >> (8 * 3);
2544 rbuf[1] = last_lba >> (8 * 2);
2545 rbuf[2] = last_lba >> (8 * 1);
2549 rbuf[4] = sector_size >> (8 * 3);
2550 rbuf[5] = sector_size >> (8 * 2);
2551 rbuf[6] = sector_size >> (8 * 1);
2552 rbuf[7] = sector_size;
2554 /* sector count, 64-bit */
2555 rbuf[0] = last_lba >> (8 * 7);
2556 rbuf[1] = last_lba >> (8 * 6);
2557 rbuf[2] = last_lba >> (8 * 5);
2558 rbuf[3] = last_lba >> (8 * 4);
2559 rbuf[4] = last_lba >> (8 * 3);
2560 rbuf[5] = last_lba >> (8 * 2);
2561 rbuf[6] = last_lba >> (8 * 1);
2565 rbuf[ 8] = sector_size >> (8 * 3);
2566 rbuf[ 9] = sector_size >> (8 * 2);
2567 rbuf[10] = sector_size >> (8 * 1);
2568 rbuf[11] = sector_size;
2571 rbuf[13] = log2_per_phys;
2572 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2573 rbuf[15] = lowest_aligned;
2575 if (ata_id_has_trim(args->id) &&
2576 !(dev->horkage & ATA_HORKAGE_NOTRIM)) {
2577 rbuf[14] |= 0x80; /* LBPME */
2579 if (ata_id_has_zero_after_trim(args->id) &&
2580 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) {
2581 ata_dev_info(dev, "Enabling discard_zeroes_data\n");
2582 rbuf[14] |= 0x40; /* LBPRZ */
2590 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2591 * @args: device IDENTIFY data / SCSI command of interest.
2592 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2594 * Simulate REPORT LUNS command.
2597 * spin_lock_irqsave(host lock)
2599 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2602 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2607 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2609 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2610 /* FIXME: not quite right; we don't want the
2611 * translation of taskfile registers into
2612 * a sense descriptors, since that's only
2613 * correct for ATA, not ATAPI
2615 ata_gen_passthru_sense(qc);
2621 /* is it pointless to prefer PIO for "safety reasons"? */
2622 static inline int ata_pio_use_silly(struct ata_port *ap)
2624 return (ap->flags & ATA_FLAG_PIO_DMA);
2627 static void atapi_request_sense(struct ata_queued_cmd *qc)
2629 struct ata_port *ap = qc->ap;
2630 struct scsi_cmnd *cmd = qc->scsicmd;
2632 DPRINTK("ATAPI request sense\n");
2634 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2636 #ifdef CONFIG_ATA_SFF
2637 if (ap->ops->sff_tf_read)
2638 ap->ops->sff_tf_read(ap, &qc->tf);
2641 /* fill these in, for the case where they are -not- overwritten */
2642 cmd->sense_buffer[0] = 0x70;
2643 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2647 /* setup sg table and init transfer direction */
2648 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2649 ata_sg_init(qc, &qc->sgent, 1);
2650 qc->dma_dir = DMA_FROM_DEVICE;
2652 memset(&qc->cdb, 0, qc->dev->cdb_len);
2653 qc->cdb[0] = REQUEST_SENSE;
2654 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2656 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2657 qc->tf.command = ATA_CMD_PACKET;
2659 if (ata_pio_use_silly(ap)) {
2660 qc->tf.protocol = ATAPI_PROT_DMA;
2661 qc->tf.feature |= ATAPI_PKT_DMA;
2663 qc->tf.protocol = ATAPI_PROT_PIO;
2664 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2667 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2669 qc->complete_fn = atapi_sense_complete;
2676 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2678 struct scsi_cmnd *cmd = qc->scsicmd;
2679 unsigned int err_mask = qc->err_mask;
2681 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2683 /* handle completion from new EH */
2684 if (unlikely(qc->ap->ops->error_handler &&
2685 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2687 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2688 /* FIXME: not quite right; we don't want the
2689 * translation of taskfile registers into a
2690 * sense descriptors, since that's only
2691 * correct for ATA, not ATAPI
2693 ata_gen_passthru_sense(qc);
2696 /* SCSI EH automatically locks door if sdev->locked is
2697 * set. Sometimes door lock request continues to
2698 * fail, for example, when no media is present. This
2699 * creates a loop - SCSI EH issues door lock which
2700 * fails and gets invoked again to acquire sense data
2701 * for the failed command.
2703 * If door lock fails, always clear sdev->locked to
2704 * avoid this infinite loop.
2706 * This may happen before SCSI scan is complete. Make
2707 * sure qc->dev->sdev isn't NULL before dereferencing.
2709 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2710 qc->dev->sdev->locked = 0;
2712 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2717 /* successful completion or old EH failure path */
2718 if (unlikely(err_mask & AC_ERR_DEV)) {
2719 cmd->result = SAM_STAT_CHECK_CONDITION;
2720 atapi_request_sense(qc);
2722 } else if (unlikely(err_mask)) {
2723 /* FIXME: not quite right; we don't want the
2724 * translation of taskfile registers into
2725 * a sense descriptors, since that's only
2726 * correct for ATA, not ATAPI
2728 ata_gen_passthru_sense(qc);
2730 u8 *scsicmd = cmd->cmnd;
2732 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2733 unsigned long flags;
2736 buf = ata_scsi_rbuf_get(cmd, true, &flags);
2738 /* ATAPI devices typically report zero for their SCSI version,
2739 * and sometimes deviate from the spec WRT response data
2740 * format. If SCSI version is reported as zero like normal,
2741 * then we make the following fixups: 1) Fake MMC-5 version,
2742 * to indicate to the Linux scsi midlayer this is a modern
2743 * device. 2) Ensure response data format / ATAPI information
2744 * are always correct.
2751 ata_scsi_rbuf_put(cmd, true, &flags);
2754 cmd->result = SAM_STAT_GOOD;
2760 * atapi_xlat - Initialize PACKET taskfile
2761 * @qc: command structure to be initialized
2764 * spin_lock_irqsave(host lock)
2767 * Zero on success, non-zero on failure.
2769 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2771 struct scsi_cmnd *scmd = qc->scsicmd;
2772 struct ata_device *dev = qc->dev;
2773 int nodata = (scmd->sc_data_direction == DMA_NONE);
2774 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2775 unsigned int nbytes;
2777 memset(qc->cdb, 0, dev->cdb_len);
2778 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2780 qc->complete_fn = atapi_qc_complete;
2782 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2783 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2784 qc->tf.flags |= ATA_TFLAG_WRITE;
2785 DPRINTK("direction: write\n");
2788 qc->tf.command = ATA_CMD_PACKET;
2789 ata_qc_set_pc_nbytes(qc);
2791 /* check whether ATAPI DMA is safe */
2792 if (!nodata && !using_pio && atapi_check_dma(qc))
2795 /* Some controller variants snoop this value for Packet
2796 * transfers to do state machine and FIFO management. Thus we
2797 * want to set it properly, and for DMA where it is
2798 * effectively meaningless.
2800 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2802 /* Most ATAPI devices which honor transfer chunk size don't
2803 * behave according to the spec when odd chunk size which
2804 * matches the transfer length is specified. If the number of
2805 * bytes to transfer is 2n+1. According to the spec, what
2806 * should happen is to indicate that 2n+1 is going to be
2807 * transferred and transfer 2n+2 bytes where the last byte is
2810 * In practice, this doesn't happen. ATAPI devices first
2811 * indicate and transfer 2n bytes and then indicate and
2812 * transfer 2 bytes where the last byte is padding.
2814 * This inconsistency confuses several controllers which
2815 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2816 * These controllers use actual number of transferred bytes to
2817 * update DMA poitner and transfer of 4n+2 bytes make those
2818 * controller push DMA pointer by 4n+4 bytes because SATA data
2819 * FISes are aligned to 4 bytes. This causes data corruption
2820 * and buffer overrun.
2822 * Always setting nbytes to even number solves this problem
2823 * because then ATAPI devices don't have to split data at 2n
2829 qc->tf.lbam = (nbytes & 0xFF);
2830 qc->tf.lbah = (nbytes >> 8);
2833 qc->tf.protocol = ATAPI_PROT_NODATA;
2835 qc->tf.protocol = ATAPI_PROT_PIO;
2838 qc->tf.protocol = ATAPI_PROT_DMA;
2839 qc->tf.feature |= ATAPI_PKT_DMA;
2841 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2842 (scmd->sc_data_direction != DMA_TO_DEVICE))
2843 /* some SATA bridges need us to indicate data xfer direction */
2844 qc->tf.feature |= ATAPI_DMADIR;
2848 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2849 as ATAPI tape drives don't get this right otherwise */
2853 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2855 if (!sata_pmp_attached(ap)) {
2856 if (likely(devno >= 0 &&
2857 devno < ata_link_max_devices(&ap->link)))
2858 return &ap->link.device[devno];
2860 if (likely(devno >= 0 &&
2861 devno < ap->nr_pmp_links))
2862 return &ap->pmp_link[devno].device[0];
2868 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2869 const struct scsi_device *scsidev)
2873 /* skip commands not addressed to targets we simulate */
2874 if (!sata_pmp_attached(ap)) {
2875 if (unlikely(scsidev->channel || scsidev->lun))
2877 devno = scsidev->id;
2879 if (unlikely(scsidev->id || scsidev->lun))
2881 devno = scsidev->channel;
2884 return ata_find_dev(ap, devno);
2888 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2889 * @ap: ATA port to which the device is attached
2890 * @scsidev: SCSI device from which we derive the ATA device
2892 * Given various information provided in struct scsi_cmnd,
2893 * map that onto an ATA bus, and using that mapping
2894 * determine which ata_device is associated with the
2895 * SCSI command to be sent.
2898 * spin_lock_irqsave(host lock)
2901 * Associated ATA device, or %NULL if not found.
2903 static struct ata_device *
2904 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2906 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2908 if (unlikely(!dev || !ata_dev_enabled(dev)))
2915 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2916 * @byte1: Byte 1 from pass-thru CDB.
2919 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2922 ata_scsi_map_proto(u8 byte1)
2924 switch((byte1 & 0x1e) >> 1) {
2925 case 3: /* Non-data */
2926 return ATA_PROT_NODATA;
2929 case 10: /* UDMA Data-in */
2930 case 11: /* UDMA Data-Out */
2931 return ATA_PROT_DMA;
2933 case 4: /* PIO Data-in */
2934 case 5: /* PIO Data-out */
2935 return ATA_PROT_PIO;
2937 case 12: /* FPDMA */
2938 return ATA_PROT_NCQ;
2940 case 0: /* Hard Reset */
2942 case 8: /* Device Diagnostic */
2943 case 9: /* Device Reset */
2944 case 7: /* DMA Queued */
2945 case 15: /* Return Response Info */
2946 default: /* Reserved */
2950 return ATA_PROT_UNKNOWN;
2954 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2955 * @qc: command structure to be initialized
2957 * Handles either 12 or 16-byte versions of the CDB.
2960 * Zero on success, non-zero on failure.
2962 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2964 struct ata_taskfile *tf = &(qc->tf);
2965 struct scsi_cmnd *scmd = qc->scsicmd;
2966 struct ata_device *dev = qc->dev;
2967 const u8 *cdb = scmd->cmnd;
2969 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2973 tf->flags |= ATA_TFLAG_LBA;
2976 * 12 and 16 byte CDBs use different offsets to
2977 * provide the various register values.
2979 if (cdb[0] == ATA_16) {
2981 * 16-byte CDB - may contain extended commands.
2983 * If that is the case, copy the upper byte register values.
2985 if (cdb[1] & 0x01) {
2986 tf->hob_feature = cdb[3];
2987 tf->hob_nsect = cdb[5];
2988 tf->hob_lbal = cdb[7];
2989 tf->hob_lbam = cdb[9];
2990 tf->hob_lbah = cdb[11];
2991 tf->flags |= ATA_TFLAG_LBA48;
2993 tf->flags &= ~ATA_TFLAG_LBA48;
2996 * Always copy low byte, device and command registers.
2998 tf->feature = cdb[4];
3003 tf->device = cdb[13];
3004 tf->command = cdb[14];
3007 * 12-byte CDB - incapable of extended commands.
3009 tf->flags &= ~ATA_TFLAG_LBA48;
3011 tf->feature = cdb[3];
3016 tf->device = cdb[8];
3017 tf->command = cdb[9];
3020 /* For NCQ commands with FPDMA protocol, copy the tag value */
3021 if (tf->protocol == ATA_PROT_NCQ)
3022 tf->nsect = qc->tag << 3;
3024 /* enforce correct master/slave bit */
3025 tf->device = dev->devno ?
3026 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
3028 switch (tf->command) {
3029 /* READ/WRITE LONG use a non-standard sect_size */
3030 case ATA_CMD_READ_LONG:
3031 case ATA_CMD_READ_LONG_ONCE:
3032 case ATA_CMD_WRITE_LONG:
3033 case ATA_CMD_WRITE_LONG_ONCE:
3034 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
3036 qc->sect_size = scsi_bufflen(scmd);
3039 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3040 case ATA_CMD_CFA_WRITE_NE:
3041 case ATA_CMD_CFA_TRANS_SECT:
3042 case ATA_CMD_CFA_WRITE_MULT_NE:
3043 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3045 case ATA_CMD_READ_EXT:
3046 case ATA_CMD_READ_QUEUED:
3047 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3048 case ATA_CMD_FPDMA_READ:
3049 case ATA_CMD_READ_MULTI:
3050 case ATA_CMD_READ_MULTI_EXT:
3051 case ATA_CMD_PIO_READ:
3052 case ATA_CMD_PIO_READ_EXT:
3053 case ATA_CMD_READ_STREAM_DMA_EXT:
3054 case ATA_CMD_READ_STREAM_EXT:
3055 case ATA_CMD_VERIFY:
3056 case ATA_CMD_VERIFY_EXT:
3058 case ATA_CMD_WRITE_EXT:
3059 case ATA_CMD_WRITE_FUA_EXT:
3060 case ATA_CMD_WRITE_QUEUED:
3061 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
3062 case ATA_CMD_FPDMA_WRITE:
3063 case ATA_CMD_WRITE_MULTI:
3064 case ATA_CMD_WRITE_MULTI_EXT:
3065 case ATA_CMD_WRITE_MULTI_FUA_EXT:
3066 case ATA_CMD_PIO_WRITE:
3067 case ATA_CMD_PIO_WRITE_EXT:
3068 case ATA_CMD_WRITE_STREAM_DMA_EXT:
3069 case ATA_CMD_WRITE_STREAM_EXT:
3070 qc->sect_size = scmd->device->sector_size;
3073 /* Everything else uses 512 byte "sectors" */
3075 qc->sect_size = ATA_SECT_SIZE;
3079 * Set flags so that all registers will be written, pass on
3080 * write indication (used for PIO/DMA setup), result TF is
3081 * copied back and we don't whine too much about its failure.
3083 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3084 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3085 tf->flags |= ATA_TFLAG_WRITE;
3087 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3090 * Set transfer length.
3092 * TODO: find out if we need to do more here to
3093 * cover scatter/gather case.
3095 ata_qc_set_pc_nbytes(qc);
3097 /* We may not issue DMA commands if no DMA mode is set */
3098 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
3101 /* sanity check for pio multi commands */
3102 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
3105 if (is_multi_taskfile(tf)) {
3106 unsigned int multi_count = 1 << (cdb[1] >> 5);
3108 /* compare the passed through multi_count
3109 * with the cached multi_count of libata
3111 if (multi_count != dev->multi_count)
3112 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3117 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3118 * SET_FEATURES - XFER MODE must be preceded/succeeded
3119 * by an update to hardware-specific registers for each
3120 * controller (i.e. the reason for ->set_piomode(),
3121 * ->set_dmamode(), and ->post_set_mode() hooks).
3123 if (tf->command == ATA_CMD_SET_FEATURES &&
3124 tf->feature == SETFEATURES_XFER)
3128 * Filter TPM commands by default. These provide an
3129 * essentially uncontrolled encrypted "back door" between
3130 * applications and the disk. Set libata.allow_tpm=1 if you
3131 * have a real reason for wanting to use them. This ensures
3132 * that installed software cannot easily mess stuff up without
3133 * user intent. DVR type users will probably ship with this enabled
3134 * for movie content management.
3136 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3137 * for this and should do in future but that it is not sufficient as
3138 * DCS is an optional feature set. Thus we also do the software filter
3139 * so that we comply with the TC consortium stated goal that the user
3140 * can turn off TC features of their system.
3142 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
3148 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3149 /* "Invalid field in cdb" */
3153 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3155 struct ata_taskfile *tf = &qc->tf;
3156 struct scsi_cmnd *scmd = qc->scsicmd;
3157 struct ata_device *dev = qc->dev;
3158 const u8 *cdb = scmd->cmnd;
3164 /* we may not issue DMA commands if no DMA mode is set */
3165 if (unlikely(!dev->dma_mode))
3168 if (unlikely(scmd->cmd_len < 16))
3170 scsi_16_lba_len(cdb, &block, &n_block);
3172 /* for now we only support WRITE SAME with the unmap bit set */
3173 if (unlikely(!(cdb[1] & 0x8)))
3177 * WRITE SAME always has a sector sized buffer as payload, this
3178 * should never be a multiple entry S/G list.
3180 if (!scsi_sg_count(scmd))
3183 buf = page_address(sg_page(scsi_sglist(scmd)));
3184 size = ata_set_lba_range_entries(buf, 512, block, n_block);
3186 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3187 /* Newer devices support queued TRIM commands */
3188 tf->protocol = ATA_PROT_NCQ;
3189 tf->command = ATA_CMD_FPDMA_SEND;
3190 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3191 tf->nsect = qc->tag << 3;
3192 tf->hob_feature = (size / 512) >> 8;
3193 tf->feature = size / 512;
3197 tf->protocol = ATA_PROT_DMA;
3198 tf->hob_feature = 0;
3199 tf->feature = ATA_DSM_TRIM;
3200 tf->hob_nsect = (size / 512) >> 8;
3201 tf->nsect = size / 512;
3202 tf->command = ATA_CMD_DSM;
3205 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3208 ata_qc_set_pc_nbytes(qc);
3213 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3214 /* "Invalid field in cdb" */
3219 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3220 * @qc: Storage for translated ATA taskfile
3221 * @buf: input buffer
3222 * @len: number of valid bytes in the input buffer
3224 * Prepare a taskfile to modify caching information for the device.
3229 static int ata_mselect_caching(struct ata_queued_cmd *qc,
3230 const u8 *buf, int len)
3232 struct ata_taskfile *tf = &qc->tf;
3233 struct ata_device *dev = qc->dev;
3234 char mpage[CACHE_MPAGE_LEN];
3238 * The first two bytes of def_cache_mpage are a header, so offsets
3239 * in mpage are off by 2 compared to buf. Same for len.
3242 if (len != CACHE_MPAGE_LEN - 2)
3245 wce = buf[0] & (1 << 2);
3248 * Check that read-only bits are not modified.
3250 ata_msense_caching(dev->id, mpage, false);
3251 mpage[2] &= ~(1 << 2);
3253 if (memcmp(mpage + 2, buf, CACHE_MPAGE_LEN - 2) != 0)
3256 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3257 tf->protocol = ATA_PROT_NODATA;
3259 tf->command = ATA_CMD_SET_FEATURES;
3260 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3265 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
3266 * @qc: Storage for translated ATA taskfile
3268 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3269 * Assume this is invoked for direct access devices (e.g. disks) only.
3270 * There should be no block descriptor for other device types.
3273 * spin_lock_irqsave(host lock)
3275 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3277 struct scsi_cmnd *scmd = qc->scsicmd;
3278 const u8 *cdb = scmd->cmnd;
3281 unsigned six_byte, pg_len, hdr_len, bd_len;
3286 six_byte = (cdb[0] == MODE_SELECT);
3288 if (scmd->cmd_len < 5)
3294 if (scmd->cmd_len < 9)
3297 len = (cdb[7] << 8) + cdb[8];
3301 /* We only support PF=1, SP=0. */
3302 if ((cdb[1] & 0x11) != 0x10)
3305 /* Test early for possible overrun. */
3306 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
3307 goto invalid_param_len;
3309 p = page_address(sg_page(scsi_sglist(scmd)));
3311 /* Move past header and block descriptors. */
3313 goto invalid_param_len;
3318 bd_len = (p[6] << 8) + p[7];
3323 goto invalid_param_len;
3324 if (bd_len != 0 && bd_len != 8)
3332 /* Parse both possible formats for the mode page headers. */
3336 goto invalid_param_len;
3339 pg_len = (p[2] << 8) | p[3];
3344 goto invalid_param_len;
3353 * No mode subpages supported (yet) but asking for _all_
3354 * subpages may be valid
3356 if (spg && (spg != ALL_SUB_MPAGES))
3359 goto invalid_param_len;
3363 if (ata_mselect_caching(qc, p, pg_len) < 0)
3367 default: /* invalid page code */
3372 * Only one page has changeable data, so we only support setting one
3381 /* "Invalid field in CDB" */
3382 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
3386 /* "Invalid field in parameter list" */
3387 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x26, 0x0);
3391 /* "Parameter list length error" */
3392 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3396 scmd->result = SAM_STAT_GOOD;
3401 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3403 * @cmd: SCSI command opcode to consider
3405 * Look up the SCSI command given, and determine whether the
3406 * SCSI command is to be translated or simulated.
3409 * Pointer to translation function if possible, %NULL if not.
3412 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3422 return ata_scsi_rw_xlat;
3425 return ata_scsi_write_same_xlat;
3427 case SYNCHRONIZE_CACHE:
3428 if (ata_try_flush_cache(dev))
3429 return ata_scsi_flush_xlat;
3434 return ata_scsi_verify_xlat;
3438 return ata_scsi_pass_thru;
3441 case MODE_SELECT_10:
3442 return ata_scsi_mode_select_xlat;
3446 return ata_scsi_start_stop_xlat;
3453 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3454 * @ap: ATA port to which the command was being sent
3455 * @cmd: SCSI command to dump
3457 * Prints the contents of a SCSI command via printk().
3460 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3461 struct scsi_cmnd *cmd)
3464 struct scsi_device *scsidev = cmd->device;
3465 u8 *scsicmd = cmd->cmnd;
3467 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
3469 scsidev->channel, scsidev->id, scsidev->lun,
3470 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3471 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3476 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
3477 struct ata_device *dev)
3479 u8 scsi_op = scmd->cmnd[0];
3480 ata_xlat_func_t xlat_func;
3483 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
3484 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3487 xlat_func = ata_get_xlat_func(dev, scsi_op);
3489 if (unlikely(!scmd->cmd_len))
3493 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3494 /* relay SCSI command to ATAPI device */
3495 int len = COMMAND_SIZE(scsi_op);
3496 if (unlikely(len > scmd->cmd_len ||
3497 len > dev->cdb_len ||
3498 scmd->cmd_len > ATAPI_CDB_LEN))
3501 xlat_func = atapi_xlat;
3503 /* ATA_16 passthru, treat as an ATA command */
3504 if (unlikely(scmd->cmd_len > 16))
3507 xlat_func = ata_get_xlat_func(dev, scsi_op);
3512 rc = ata_scsi_translate(dev, scmd, xlat_func);
3514 ata_scsi_simulate(dev, scmd);
3519 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3520 scmd->cmd_len, scsi_op, dev->cdb_len);
3521 scmd->result = DID_ERROR << 16;
3522 scmd->scsi_done(scmd);
3527 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3528 * @shost: SCSI host of command to be sent
3529 * @cmd: SCSI command to be sent
3531 * In some cases, this function translates SCSI commands into
3532 * ATA taskfiles, and queues the taskfiles to be sent to
3533 * hardware. In other cases, this function simulates a
3534 * SCSI device by evaluating and responding to certain
3535 * SCSI commands. This creates the overall effect of
3536 * ATA and ATAPI devices appearing as SCSI devices.
3542 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3545 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
3547 struct ata_port *ap;
3548 struct ata_device *dev;
3549 struct scsi_device *scsidev = cmd->device;
3551 unsigned long irq_flags;
3553 ap = ata_shost_to_port(shost);
3555 spin_lock_irqsave(ap->lock, irq_flags);
3557 ata_scsi_dump_cdb(ap, cmd);
3559 dev = ata_scsi_find_dev(ap, scsidev);
3561 rc = __ata_scsi_queuecmd(cmd, dev);
3563 cmd->result = (DID_BAD_TARGET << 16);
3564 cmd->scsi_done(cmd);
3567 spin_unlock_irqrestore(ap->lock, irq_flags);
3573 * ata_scsi_simulate - simulate SCSI command on ATA device
3574 * @dev: the target device
3575 * @cmd: SCSI command being sent to device.
3577 * Interprets and directly executes a select list of SCSI commands
3578 * that can be handled internally.
3581 * spin_lock_irqsave(host lock)
3584 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
3586 struct ata_scsi_args args;
3587 const u8 *scsicmd = cmd->cmnd;
3593 args.done = cmd->scsi_done;
3595 switch(scsicmd[0]) {
3596 /* TODO: worth improving? */
3598 ata_scsi_invalid_field(cmd);
3602 if (scsicmd[1] & 2) /* is CmdDt set? */
3603 ata_scsi_invalid_field(cmd);
3604 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3605 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3606 else switch (scsicmd[2]) {
3608 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
3611 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
3614 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
3617 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3620 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3623 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3626 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
3629 ata_scsi_invalid_field(cmd);
3636 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3640 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3643 case SERVICE_ACTION_IN_16:
3644 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3645 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3647 ata_scsi_invalid_field(cmd);
3651 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3655 ata_scsi_set_sense(cmd, 0, 0, 0);
3656 cmd->result = (DRIVER_SENSE << 24);
3657 cmd->scsi_done(cmd);
3660 /* if we reach this, then writeback caching is disabled,
3661 * turning this into a no-op.
3663 case SYNCHRONIZE_CACHE:
3666 /* no-op's, complete with success */
3670 case TEST_UNIT_READY:
3671 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3674 case SEND_DIAGNOSTIC:
3675 tmp8 = scsicmd[1] & ~(1 << 3);
3676 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3677 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3679 ata_scsi_invalid_field(cmd);
3682 /* all other commands */
3684 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3685 /* "Invalid command operation code" */
3686 cmd->scsi_done(cmd);
3691 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3695 for (i = 0; i < host->n_ports; i++) {
3696 struct ata_port *ap = host->ports[i];
3697 struct Scsi_Host *shost;
3700 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3704 shost->eh_noresume = 1;
3705 *(struct ata_port **)&shost->hostdata[0] = ap;
3706 ap->scsi_host = shost;
3708 shost->transportt = ata_scsi_transport_template;
3709 shost->unique_id = ap->print_id;
3712 shost->max_channel = 1;
3713 shost->max_cmd_len = 16;
3714 shost->no_write_same = 1;
3716 /* Schedule policy is determined by ->qc_defer()
3717 * callback and it needs to see every deferred qc.
3718 * Set host_blocked to 1 to prevent SCSI midlayer from
3719 * automatically deferring requests.
3721 shost->max_host_blocked = 1;
3723 rc = scsi_add_host_with_dma(shost, &ap->tdev, ap->host->dev);
3732 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3734 /* scsi_host_put() is in ata_devres_release() */
3735 scsi_remove_host(shost);
3740 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3743 struct ata_device *last_failed_dev = NULL;
3744 struct ata_link *link;
3745 struct ata_device *dev;
3748 ata_for_each_link(link, ap, EDGE) {
3749 ata_for_each_dev(dev, link, ENABLED) {
3750 struct scsi_device *sdev;
3751 int channel = 0, id = 0;
3756 if (ata_is_host_link(link))
3759 channel = link->pmp;
3761 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3763 if (!IS_ERR(sdev)) {
3765 scsi_device_put(sdev);
3772 /* If we scanned while EH was in progress or allocation
3773 * failure occurred, scan would have failed silently. Check
3774 * whether all devices are attached.
3776 ata_for_each_link(link, ap, EDGE) {
3777 ata_for_each_dev(dev, link, ENABLED) {
3786 /* we're missing some SCSI devices */
3788 /* If caller requested synchrnous scan && we've made
3789 * any progress, sleep briefly and repeat.
3791 if (dev != last_failed_dev) {
3793 last_failed_dev = dev;
3797 /* We might be failing to detect boot device, give it
3798 * a few more chances.
3806 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
3809 queue_delayed_work(system_long_wq, &ap->hotplug_task,
3810 round_jiffies_relative(HZ));
3814 * ata_scsi_offline_dev - offline attached SCSI device
3815 * @dev: ATA device to offline attached SCSI device for
3817 * This function is called from ata_eh_hotplug() and responsible
3818 * for taking the SCSI device attached to @dev offline. This
3819 * function is called with host lock which protects dev->sdev
3823 * spin_lock_irqsave(host lock)
3826 * 1 if attached SCSI device exists, 0 otherwise.
3828 int ata_scsi_offline_dev(struct ata_device *dev)
3831 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3838 * ata_scsi_remove_dev - remove attached SCSI device
3839 * @dev: ATA device to remove attached SCSI device for
3841 * This function is called from ata_eh_scsi_hotplug() and
3842 * responsible for removing the SCSI device attached to @dev.
3845 * Kernel thread context (may sleep).
3847 static void ata_scsi_remove_dev(struct ata_device *dev)
3849 struct ata_port *ap = dev->link->ap;
3850 struct scsi_device *sdev;
3851 unsigned long flags;
3853 /* Alas, we need to grab scan_mutex to ensure SCSI device
3854 * state doesn't change underneath us and thus
3855 * scsi_device_get() always succeeds. The mutex locking can
3856 * be removed if there is __scsi_device_get() interface which
3857 * increments reference counts regardless of device state.
3859 mutex_lock(&ap->scsi_host->scan_mutex);
3860 spin_lock_irqsave(ap->lock, flags);
3862 /* clearing dev->sdev is protected by host lock */
3867 /* If user initiated unplug races with us, sdev can go
3868 * away underneath us after the host lock and
3869 * scan_mutex are released. Hold onto it.
3871 if (scsi_device_get(sdev) == 0) {
3872 /* The following ensures the attached sdev is
3873 * offline on return from ata_scsi_offline_dev()
3874 * regardless it wins or loses the race
3875 * against this function.
3877 scsi_device_set_state(sdev, SDEV_OFFLINE);
3884 spin_unlock_irqrestore(ap->lock, flags);
3885 mutex_unlock(&ap->scsi_host->scan_mutex);
3888 ata_dev_info(dev, "detaching (SCSI %s)\n",
3889 dev_name(&sdev->sdev_gendev));
3891 scsi_remove_device(sdev);
3892 scsi_device_put(sdev);
3896 static void ata_scsi_handle_link_detach(struct ata_link *link)
3898 struct ata_port *ap = link->ap;
3899 struct ata_device *dev;
3901 ata_for_each_dev(dev, link, ALL) {
3902 unsigned long flags;
3904 if (!(dev->flags & ATA_DFLAG_DETACHED))
3907 spin_lock_irqsave(ap->lock, flags);
3908 dev->flags &= ~ATA_DFLAG_DETACHED;
3909 spin_unlock_irqrestore(ap->lock, flags);
3911 if (zpodd_dev_enabled(dev))
3914 ata_scsi_remove_dev(dev);
3919 * ata_scsi_media_change_notify - send media change event
3920 * @dev: Pointer to the disk device with media change event
3922 * Tell the block layer to send a media change notification
3926 * spin_lock_irqsave(host lock)
3928 void ata_scsi_media_change_notify(struct ata_device *dev)
3931 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3936 * ata_scsi_hotplug - SCSI part of hotplug
3937 * @work: Pointer to ATA port to perform SCSI hotplug on
3939 * Perform SCSI part of hotplug. It's executed from a separate
3940 * workqueue after EH completes. This is necessary because SCSI
3941 * hot plugging requires working EH and hot unplugging is
3942 * synchronized with hot plugging with a mutex.
3945 * Kernel thread context (may sleep).
3947 void ata_scsi_hotplug(struct work_struct *work)
3949 struct ata_port *ap =
3950 container_of(work, struct ata_port, hotplug_task.work);
3953 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3954 DPRINTK("ENTER/EXIT - unloading\n");
3961 * The block layer suspend/resume path is fundamentally broken due
3962 * to freezable kthreads and workqueue and may deadlock if a block
3963 * device gets removed while resume is in progress. I don't know
3964 * what the solution is short of removing freezable kthreads and
3965 * workqueues altogether.
3967 * The following is an ugly hack to avoid kicking off device
3968 * removal while freezer is active. This is a joke but does avoid
3969 * this particular deadlock scenario.
3971 * https://bugzilla.kernel.org/show_bug.cgi?id=62801
3972 * http://marc.info/?l=linux-kernel&m=138695698516487
3974 #ifdef CONFIG_FREEZER
3980 mutex_lock(&ap->scsi_scan_mutex);
3982 /* Unplug detached devices. We cannot use link iterator here
3983 * because PMP links have to be scanned even if PMP is
3984 * currently not attached. Iterate manually.
3986 ata_scsi_handle_link_detach(&ap->link);
3988 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3989 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3991 /* scan for new ones */
3992 ata_scsi_scan_host(ap, 0);
3994 mutex_unlock(&ap->scsi_scan_mutex);
3999 * ata_scsi_user_scan - indication for user-initiated bus scan
4000 * @shost: SCSI host to scan
4001 * @channel: Channel to scan
4005 * This function is called when user explicitly requests bus
4006 * scan. Set probe pending flag and invoke EH.
4009 * SCSI layer (we don't care)
4014 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
4015 unsigned int id, u64 lun)
4017 struct ata_port *ap = ata_shost_to_port(shost);
4018 unsigned long flags;
4021 if (!ap->ops->error_handler)
4024 if (lun != SCAN_WILD_CARD && lun)
4027 if (!sata_pmp_attached(ap)) {
4028 if (channel != SCAN_WILD_CARD && channel)
4032 if (id != SCAN_WILD_CARD && id)
4037 spin_lock_irqsave(ap->lock, flags);
4039 if (devno == SCAN_WILD_CARD) {
4040 struct ata_link *link;
4042 ata_for_each_link(link, ap, EDGE) {
4043 struct ata_eh_info *ehi = &link->eh_info;
4044 ehi->probe_mask |= ATA_ALL_DEVICES;
4045 ehi->action |= ATA_EH_RESET;
4048 struct ata_device *dev = ata_find_dev(ap, devno);
4051 struct ata_eh_info *ehi = &dev->link->eh_info;
4052 ehi->probe_mask |= 1 << dev->devno;
4053 ehi->action |= ATA_EH_RESET;
4059 ata_port_schedule_eh(ap);
4060 spin_unlock_irqrestore(ap->lock, flags);
4061 ata_port_wait_eh(ap);
4063 spin_unlock_irqrestore(ap->lock, flags);
4069 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4070 * @work: Pointer to ATA port to perform scsi_rescan_device()
4072 * After ATA pass thru (SAT) commands are executed successfully,
4073 * libata need to propagate the changes to SCSI layer.
4076 * Kernel thread context (may sleep).
4078 void ata_scsi_dev_rescan(struct work_struct *work)
4080 struct ata_port *ap =
4081 container_of(work, struct ata_port, scsi_rescan_task);
4082 struct ata_link *link;
4083 struct ata_device *dev;
4084 unsigned long flags;
4086 mutex_lock(&ap->scsi_scan_mutex);
4087 spin_lock_irqsave(ap->lock, flags);
4089 ata_for_each_link(link, ap, EDGE) {
4090 ata_for_each_dev(dev, link, ENABLED) {
4091 struct scsi_device *sdev = dev->sdev;
4095 if (scsi_device_get(sdev))
4098 spin_unlock_irqrestore(ap->lock, flags);
4099 scsi_rescan_device(&(sdev->sdev_gendev));
4100 scsi_device_put(sdev);
4101 spin_lock_irqsave(ap->lock, flags);
4105 spin_unlock_irqrestore(ap->lock, flags);
4106 mutex_unlock(&ap->scsi_scan_mutex);
4110 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4111 * @host: ATA host container for all SAS ports
4112 * @port_info: Information from low-level host driver
4113 * @shost: SCSI host that the scsi device is attached to
4116 * PCI/etc. bus probe sem.
4119 * ata_port pointer on success / NULL on failure.
4122 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
4123 struct ata_port_info *port_info,
4124 struct Scsi_Host *shost)
4126 struct ata_port *ap;
4128 ap = ata_port_alloc(host);
4133 ap->lock = &host->lock;
4134 ap->pio_mask = port_info->pio_mask;
4135 ap->mwdma_mask = port_info->mwdma_mask;
4136 ap->udma_mask = port_info->udma_mask;
4137 ap->flags |= port_info->flags;
4138 ap->ops = port_info->port_ops;
4139 ap->cbl = ATA_CBL_SATA;
4143 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
4146 * ata_sas_port_start - Set port up for dma.
4147 * @ap: Port to initialize
4149 * Called just after data structures for each port are
4152 * May be used as the port_start() entry in ata_port_operations.
4155 * Inherited from caller.
4157 int ata_sas_port_start(struct ata_port *ap)
4160 * the port is marked as frozen at allocation time, but if we don't
4161 * have new eh, we won't thaw it
4163 if (!ap->ops->error_handler)
4164 ap->pflags &= ~ATA_PFLAG_FROZEN;
4167 EXPORT_SYMBOL_GPL(ata_sas_port_start);
4170 * ata_port_stop - Undo ata_sas_port_start()
4171 * @ap: Port to shut down
4173 * May be used as the port_stop() entry in ata_port_operations.
4176 * Inherited from caller.
4179 void ata_sas_port_stop(struct ata_port *ap)
4182 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
4185 * ata_sas_async_probe - simply schedule probing and return
4186 * @ap: Port to probe
4188 * For batch scheduling of probe for sas attached ata devices, assumes
4189 * the port has already been through ata_sas_port_init()
4191 void ata_sas_async_probe(struct ata_port *ap)
4193 __ata_port_probe(ap);
4195 EXPORT_SYMBOL_GPL(ata_sas_async_probe);
4197 int ata_sas_sync_probe(struct ata_port *ap)
4199 return ata_port_probe(ap);
4201 EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
4205 * ata_sas_port_init - Initialize a SATA device
4206 * @ap: SATA port to initialize
4209 * PCI/etc. bus probe sem.
4212 * Zero on success, non-zero on error.
4215 int ata_sas_port_init(struct ata_port *ap)
4217 int rc = ap->ops->port_start(ap);
4221 ap->print_id = atomic_inc_return(&ata_print_id);
4224 EXPORT_SYMBOL_GPL(ata_sas_port_init);
4227 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
4228 * @ap: SATA port to destroy
4232 void ata_sas_port_destroy(struct ata_port *ap)
4234 if (ap->ops->port_stop)
4235 ap->ops->port_stop(ap);
4238 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
4241 * ata_sas_slave_configure - Default slave_config routine for libata devices
4242 * @sdev: SCSI device to configure
4243 * @ap: ATA port to which SCSI device is attached
4249 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
4251 ata_scsi_sdev_config(sdev);
4252 ata_scsi_dev_config(sdev, ap->link.device);
4255 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
4258 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
4259 * @cmd: SCSI command to be sent
4260 * @ap: ATA port to which the command is being sent
4263 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4267 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
4271 ata_scsi_dump_cdb(ap, cmd);
4273 if (likely(ata_dev_enabled(ap->link.device)))
4274 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
4276 cmd->result = (DID_BAD_TARGET << 16);
4277 cmd->scsi_done(cmd);
4281 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
4283 int ata_sas_allocate_tag(struct ata_port *ap)
4285 unsigned int max_queue = ap->host->n_tags;
4286 unsigned int i, tag;
4288 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) {
4289 tag = tag < max_queue ? tag : 0;
4291 /* the last tag is reserved for internal command. */
4292 if (tag == ATA_TAG_INTERNAL)
4295 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) {
4296 ap->sas_last_tag = tag;
4303 void ata_sas_free_tag(unsigned int tag, struct ata_port *ap)
4305 clear_bit(tag, &ap->sas_tag_allocated);