2 * libata-scsi.c - helper library for ATA
4 * Maintained by: Tejun Heo <tj@kernel.org>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from
31 * - http://www.t10.org/
32 * - http://www.t13.org/
36 #include <linux/slab.h>
37 #include <linux/kernel.h>
38 #include <linux/blkdev.h>
39 #include <linux/spinlock.h>
40 #include <linux/export.h>
41 #include <scsi/scsi.h>
42 #include <scsi/scsi_host.h>
43 #include <scsi/scsi_cmnd.h>
44 #include <scsi/scsi_eh.h>
45 #include <scsi/scsi_device.h>
46 #include <scsi/scsi_tcq.h>
47 #include <scsi/scsi_transport.h>
48 #include <linux/libata.h>
49 #include <linux/hdreg.h>
50 #include <linux/uaccess.h>
51 #include <linux/suspend.h>
52 #include <asm/unaligned.h>
55 #include "libata-transport.h"
57 #define ATA_SCSI_RBUF_SIZE 4096
59 static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
60 static u8 ata_scsi_rbuf[ATA_SCSI_RBUF_SIZE];
62 typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc);
64 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
65 const struct scsi_device *scsidev);
66 static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
67 const struct scsi_device *scsidev);
69 #define RW_RECOVERY_MPAGE 0x1
70 #define RW_RECOVERY_MPAGE_LEN 12
71 #define CACHE_MPAGE 0x8
72 #define CACHE_MPAGE_LEN 20
73 #define CONTROL_MPAGE 0xa
74 #define CONTROL_MPAGE_LEN 12
75 #define ALL_MPAGES 0x3f
76 #define ALL_SUB_MPAGES 0xff
79 static const u8 def_rw_recovery_mpage[RW_RECOVERY_MPAGE_LEN] = {
81 RW_RECOVERY_MPAGE_LEN - 2,
83 0, /* read retry count */
85 0, /* write retry count */
89 static const u8 def_cache_mpage[CACHE_MPAGE_LEN] = {
92 0, /* contains WCE, needs to be 0 for logic */
93 0, 0, 0, 0, 0, 0, 0, 0, 0,
94 0, /* contains DRA, needs to be 0 for logic */
98 static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
100 CONTROL_MPAGE_LEN - 2,
101 2, /* DSENSE=0, GLTSD=1 */
102 0, /* [QAM+QERR may be 1, see 05-359r1] */
103 0, 0, 0, 0, 0xff, 0xff,
104 0, 30 /* extended self test time, see 05-359r1 */
107 static const char *ata_lpm_policy_names[] = {
108 [ATA_LPM_UNKNOWN] = "max_performance",
109 [ATA_LPM_MAX_POWER] = "max_performance",
110 [ATA_LPM_MED_POWER] = "medium_power",
111 [ATA_LPM_MIN_POWER] = "min_power",
114 static ssize_t ata_scsi_lpm_store(struct device *device,
115 struct device_attribute *attr,
116 const char *buf, size_t count)
118 struct Scsi_Host *shost = class_to_shost(device);
119 struct ata_port *ap = ata_shost_to_port(shost);
120 struct ata_link *link;
121 struct ata_device *dev;
122 enum ata_lpm_policy policy;
125 /* UNKNOWN is internal state, iterate from MAX_POWER */
126 for (policy = ATA_LPM_MAX_POWER;
127 policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
128 const char *name = ata_lpm_policy_names[policy];
130 if (strncmp(name, buf, strlen(name)) == 0)
133 if (policy == ARRAY_SIZE(ata_lpm_policy_names))
136 spin_lock_irqsave(ap->lock, flags);
138 ata_for_each_link(link, ap, EDGE) {
139 ata_for_each_dev(dev, &ap->link, ENABLED) {
140 if (dev->horkage & ATA_HORKAGE_NOLPM) {
147 ap->target_lpm_policy = policy;
148 ata_port_schedule_eh(ap);
150 spin_unlock_irqrestore(ap->lock, flags);
154 static ssize_t ata_scsi_lpm_show(struct device *dev,
155 struct device_attribute *attr, char *buf)
157 struct Scsi_Host *shost = class_to_shost(dev);
158 struct ata_port *ap = ata_shost_to_port(shost);
160 if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
163 return snprintf(buf, PAGE_SIZE, "%s\n",
164 ata_lpm_policy_names[ap->target_lpm_policy]);
166 DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
167 ata_scsi_lpm_show, ata_scsi_lpm_store);
168 EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);
170 static ssize_t ata_scsi_park_show(struct device *device,
171 struct device_attribute *attr, char *buf)
173 struct scsi_device *sdev = to_scsi_device(device);
175 struct ata_link *link;
176 struct ata_device *dev;
178 unsigned int uninitialized_var(msecs);
181 ap = ata_shost_to_port(sdev->host);
183 spin_lock_irq(ap->lock);
184 dev = ata_scsi_find_dev(ap, sdev);
189 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
196 if (ap->pflags & ATA_PFLAG_EH_IN_PROGRESS &&
197 link->eh_context.unloaded_mask & (1 << dev->devno) &&
198 time_after(dev->unpark_deadline, now))
199 msecs = jiffies_to_msecs(dev->unpark_deadline - now);
204 spin_unlock_irq(ap->lock);
206 return rc ? rc : snprintf(buf, 20, "%u\n", msecs);
209 static ssize_t ata_scsi_park_store(struct device *device,
210 struct device_attribute *attr,
211 const char *buf, size_t len)
213 struct scsi_device *sdev = to_scsi_device(device);
215 struct ata_device *dev;
220 rc = kstrtol(buf, 10, &input);
225 if (input > ATA_TMOUT_MAX_PARK) {
227 input = ATA_TMOUT_MAX_PARK;
230 ap = ata_shost_to_port(sdev->host);
232 spin_lock_irqsave(ap->lock, flags);
233 dev = ata_scsi_find_dev(ap, sdev);
234 if (unlikely(!dev)) {
238 if (dev->class != ATA_DEV_ATA &&
239 dev->class != ATA_DEV_ZAC) {
245 if (dev->flags & ATA_DFLAG_NO_UNLOAD) {
250 dev->unpark_deadline = ata_deadline(jiffies, input);
251 dev->link->eh_info.dev_action[dev->devno] |= ATA_EH_PARK;
252 ata_port_schedule_eh(ap);
253 complete(&ap->park_req_pending);
257 dev->flags &= ~ATA_DFLAG_NO_UNLOAD;
260 dev->flags |= ATA_DFLAG_NO_UNLOAD;
265 spin_unlock_irqrestore(ap->lock, flags);
267 return rc ? rc : len;
269 DEVICE_ATTR(unload_heads, S_IRUGO | S_IWUSR,
270 ata_scsi_park_show, ata_scsi_park_store);
271 EXPORT_SYMBOL_GPL(dev_attr_unload_heads);
273 void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
278 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
280 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
284 ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
285 const char *buf, size_t count)
287 struct Scsi_Host *shost = class_to_shost(dev);
288 struct ata_port *ap = ata_shost_to_port(shost);
289 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
290 return ap->ops->em_store(ap, buf, count);
295 ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
298 struct Scsi_Host *shost = class_to_shost(dev);
299 struct ata_port *ap = ata_shost_to_port(shost);
301 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
302 return ap->ops->em_show(ap, buf);
305 DEVICE_ATTR(em_message, S_IRUGO | S_IWUSR,
306 ata_scsi_em_message_show, ata_scsi_em_message_store);
307 EXPORT_SYMBOL_GPL(dev_attr_em_message);
310 ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
313 struct Scsi_Host *shost = class_to_shost(dev);
314 struct ata_port *ap = ata_shost_to_port(shost);
316 return snprintf(buf, 23, "%d\n", ap->em_message_type);
318 DEVICE_ATTR(em_message_type, S_IRUGO,
319 ata_scsi_em_message_type_show, NULL);
320 EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
323 ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
326 struct scsi_device *sdev = to_scsi_device(dev);
327 struct ata_port *ap = ata_shost_to_port(sdev->host);
328 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
330 if (atadev && ap->ops->sw_activity_show &&
331 (ap->flags & ATA_FLAG_SW_ACTIVITY))
332 return ap->ops->sw_activity_show(atadev, buf);
337 ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
338 const char *buf, size_t count)
340 struct scsi_device *sdev = to_scsi_device(dev);
341 struct ata_port *ap = ata_shost_to_port(sdev->host);
342 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
343 enum sw_activity val;
346 if (atadev && ap->ops->sw_activity_store &&
347 (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
348 val = simple_strtoul(buf, NULL, 0);
350 case OFF: case BLINK_ON: case BLINK_OFF:
351 rc = ap->ops->sw_activity_store(atadev, val);
360 DEVICE_ATTR(sw_activity, S_IWUSR | S_IRUGO, ata_scsi_activity_show,
361 ata_scsi_activity_store);
362 EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
364 struct device_attribute *ata_common_sdev_attrs[] = {
365 &dev_attr_unload_heads,
368 EXPORT_SYMBOL_GPL(ata_common_sdev_attrs);
370 static void ata_scsi_invalid_field(struct scsi_cmnd *cmd)
372 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x24, 0x0);
373 /* "Invalid field in cbd" */
378 * ata_std_bios_param - generic bios head/sector/cylinder calculator used by sd.
379 * @sdev: SCSI device for which BIOS geometry is to be determined
380 * @bdev: block device associated with @sdev
381 * @capacity: capacity of SCSI device
382 * @geom: location to which geometry will be output
384 * Generic bios head/sector/cylinder calculator
385 * used by sd. Most BIOSes nowadays expect a XXX/255/16 (CHS)
386 * mapping. Some situations may arise where the disk is not
387 * bootable if this is not used.
390 * Defined by the SCSI layer. We don't really care.
395 int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
396 sector_t capacity, int geom[])
400 sector_div(capacity, 255*63);
407 * ata_scsi_unlock_native_capacity - unlock native capacity
408 * @sdev: SCSI device to adjust device capacity for
410 * This function is called if a partition on @sdev extends beyond
411 * the end of the device. It requests EH to unlock HPA.
414 * Defined by the SCSI layer. Might sleep.
416 void ata_scsi_unlock_native_capacity(struct scsi_device *sdev)
418 struct ata_port *ap = ata_shost_to_port(sdev->host);
419 struct ata_device *dev;
422 spin_lock_irqsave(ap->lock, flags);
424 dev = ata_scsi_find_dev(ap, sdev);
425 if (dev && dev->n_sectors < dev->n_native_sectors) {
426 dev->flags |= ATA_DFLAG_UNLOCK_HPA;
427 dev->link->eh_info.action |= ATA_EH_RESET;
428 ata_port_schedule_eh(ap);
431 spin_unlock_irqrestore(ap->lock, flags);
432 ata_port_wait_eh(ap);
436 * ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
438 * @sdev: SCSI device to get identify data for
439 * @arg: User buffer area for identify data
442 * Defined by the SCSI layer. We don't really care.
445 * Zero on success, negative errno on error.
447 static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
450 struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
451 u16 __user *dst = arg;
457 if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
460 ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
461 if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
464 ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
465 if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
468 ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
469 if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
476 * ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
477 * @scsidev: Device to which we are issuing command
478 * @arg: User provided data for issuing command
481 * Defined by the SCSI layer. We don't really care.
484 * Zero on success, negative errno on error.
486 int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
489 u8 scsi_cmd[MAX_COMMAND_SIZE];
490 u8 args[4], *argbuf = NULL, *sensebuf = NULL;
492 enum dma_data_direction data_dir;
498 if (copy_from_user(args, arg, sizeof(args)))
501 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
505 memset(scsi_cmd, 0, sizeof(scsi_cmd));
508 argsize = ATA_SECT_SIZE * args[3];
509 argbuf = kmalloc(argsize, GFP_KERNEL);
510 if (argbuf == NULL) {
515 scsi_cmd[1] = (4 << 1); /* PIO Data-in */
516 scsi_cmd[2] = 0x0e; /* no off.line or cc, read from dev,
517 block count in sector count field */
518 data_dir = DMA_FROM_DEVICE;
520 scsi_cmd[1] = (3 << 1); /* Non-data */
521 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
525 scsi_cmd[0] = ATA_16;
527 scsi_cmd[4] = args[2];
528 if (args[0] == ATA_CMD_SMART) { /* hack -- ide driver does this too */
529 scsi_cmd[6] = args[3];
530 scsi_cmd[8] = args[1];
534 scsi_cmd[6] = args[1];
536 scsi_cmd[14] = args[0];
538 /* Good values for timeout and retries? Values below
539 from scsi_ioctl_send_command() for default case... */
540 cmd_result = scsi_execute(scsidev, scsi_cmd, data_dir, argbuf, argsize,
541 sensebuf, (10*HZ), 5, 0, NULL);
543 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
544 u8 *desc = sensebuf + 8;
545 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
547 /* If we set cc then ATA pass-through will cause a
548 * check condition even if no error. Filter that. */
549 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
550 struct scsi_sense_hdr sshdr;
551 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
553 if (sshdr.sense_key == RECOVERED_ERROR &&
554 sshdr.asc == 0 && sshdr.ascq == 0x1d)
555 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
558 /* Send userspace a few ATA registers (same as drivers/ide) */
559 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
560 desc[0] == 0x09) { /* code is "ATA Descriptor" */
561 args[0] = desc[13]; /* status */
562 args[1] = desc[3]; /* error */
563 args[2] = desc[5]; /* sector count (0:7) */
564 if (copy_to_user(arg, args, sizeof(args)))
576 && copy_to_user(arg + sizeof(args), argbuf, argsize))
585 * ata_task_ioctl - Handler for HDIO_DRIVE_TASK ioctl
586 * @scsidev: Device to which we are issuing command
587 * @arg: User provided data for issuing command
590 * Defined by the SCSI layer. We don't really care.
593 * Zero on success, negative errno on error.
595 int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
598 u8 scsi_cmd[MAX_COMMAND_SIZE];
599 u8 args[7], *sensebuf = NULL;
605 if (copy_from_user(args, arg, sizeof(args)))
608 sensebuf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_NOIO);
612 memset(scsi_cmd, 0, sizeof(scsi_cmd));
613 scsi_cmd[0] = ATA_16;
614 scsi_cmd[1] = (3 << 1); /* Non-data */
615 scsi_cmd[2] = 0x20; /* cc but no off.line or data xfer */
616 scsi_cmd[4] = args[1];
617 scsi_cmd[6] = args[2];
618 scsi_cmd[8] = args[3];
619 scsi_cmd[10] = args[4];
620 scsi_cmd[12] = args[5];
621 scsi_cmd[13] = args[6] & 0x4f;
622 scsi_cmd[14] = args[0];
624 /* Good values for timeout and retries? Values below
625 from scsi_ioctl_send_command() for default case... */
626 cmd_result = scsi_execute(scsidev, scsi_cmd, DMA_NONE, NULL, 0,
627 sensebuf, (10*HZ), 5, 0, NULL);
629 if (driver_byte(cmd_result) == DRIVER_SENSE) {/* sense data available */
630 u8 *desc = sensebuf + 8;
631 cmd_result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */
633 /* If we set cc then ATA pass-through will cause a
634 * check condition even if no error. Filter that. */
635 if (cmd_result & SAM_STAT_CHECK_CONDITION) {
636 struct scsi_sense_hdr sshdr;
637 scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE,
639 if (sshdr.sense_key == RECOVERED_ERROR &&
640 sshdr.asc == 0 && sshdr.ascq == 0x1d)
641 cmd_result &= ~SAM_STAT_CHECK_CONDITION;
644 /* Send userspace ATA registers */
645 if (sensebuf[0] == 0x72 && /* format is "descriptor" */
646 desc[0] == 0x09) {/* code is "ATA Descriptor" */
647 args[0] = desc[13]; /* status */
648 args[1] = desc[3]; /* error */
649 args[2] = desc[5]; /* sector count (0:7) */
650 args[3] = desc[7]; /* lbal */
651 args[4] = desc[9]; /* lbam */
652 args[5] = desc[11]; /* lbah */
653 args[6] = desc[12]; /* select */
654 if (copy_to_user(arg, args, sizeof(args)))
669 static int ata_ioc32(struct ata_port *ap)
671 if (ap->flags & ATA_FLAG_PIO_DMA)
673 if (ap->pflags & ATA_PFLAG_PIO32)
678 int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
679 int cmd, void __user *arg)
687 spin_lock_irqsave(ap->lock, flags);
689 spin_unlock_irqrestore(ap->lock, flags);
690 return put_user(val, (unsigned long __user *)arg);
693 val = (unsigned long) arg;
695 spin_lock_irqsave(ap->lock, flags);
696 if (ap->pflags & ATA_PFLAG_PIO32CHANGE) {
698 ap->pflags |= ATA_PFLAG_PIO32;
700 ap->pflags &= ~ATA_PFLAG_PIO32;
702 if (val != ata_ioc32(ap))
705 spin_unlock_irqrestore(ap->lock, flags);
708 case HDIO_GET_IDENTITY:
709 return ata_get_identity(ap, scsidev, arg);
712 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
714 return ata_cmd_ioctl(scsidev, arg);
716 case HDIO_DRIVE_TASK:
717 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
719 return ata_task_ioctl(scsidev, arg);
728 EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
730 int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
732 return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
735 EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
738 * ata_scsi_qc_new - acquire new ata_queued_cmd reference
739 * @dev: ATA device to which the new command is attached
740 * @cmd: SCSI command that originated this ATA command
742 * Obtain a reference to an unused ata_queued_cmd structure,
743 * which is the basic libata structure representing a single
744 * ATA command sent to the hardware.
746 * If a command was available, fill in the SCSI-specific
747 * portions of the structure with information on the
751 * spin_lock_irqsave(host lock)
754 * Command allocated, or %NULL if none available.
756 static struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
757 struct scsi_cmnd *cmd)
759 struct ata_queued_cmd *qc;
761 qc = ata_qc_new_init(dev, cmd->request->tag);
764 qc->scsidone = cmd->scsi_done;
766 qc->sg = scsi_sglist(cmd);
767 qc->n_elem = scsi_sg_count(cmd);
769 cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
776 static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
778 struct scsi_cmnd *scmd = qc->scsicmd;
780 qc->extrabytes = scmd->request->extra_len;
781 qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
785 * ata_dump_status - user friendly display of error info
786 * @id: id of the port in question
787 * @tf: ptr to filled out taskfile
789 * Decode and dump the ATA error/status registers for the user so
790 * that they have some idea what really happened at the non
791 * make-believe layer.
794 * inherited from caller
796 static void ata_dump_status(unsigned id, struct ata_taskfile *tf)
798 u8 stat = tf->command, err = tf->feature;
800 printk(KERN_WARNING "ata%u: status=0x%02x { ", id, stat);
801 if (stat & ATA_BUSY) {
802 printk("Busy }\n"); /* Data is not valid in this case */
804 if (stat & ATA_DRDY) printk("DriveReady ");
805 if (stat & ATA_DF) printk("DeviceFault ");
806 if (stat & ATA_DSC) printk("SeekComplete ");
807 if (stat & ATA_DRQ) printk("DataRequest ");
808 if (stat & ATA_CORR) printk("CorrectedError ");
809 if (stat & ATA_SENSE) printk("Sense ");
810 if (stat & ATA_ERR) printk("Error ");
814 printk(KERN_WARNING "ata%u: error=0x%02x { ", id, err);
815 if (err & ATA_ABORTED) printk("DriveStatusError ");
816 if (err & ATA_ICRC) {
817 if (err & ATA_ABORTED)
819 else printk("Sector ");
821 if (err & ATA_UNC) printk("UncorrectableError ");
822 if (err & ATA_IDNF) printk("SectorIdNotFound ");
823 if (err & ATA_TRK0NF) printk("TrackZeroNotFound ");
824 if (err & ATA_AMNF) printk("AddrMarkNotFound ");
831 * ata_to_sense_error - convert ATA error to SCSI error
832 * @id: ATA device number
833 * @drv_stat: value contained in ATA status register
834 * @drv_err: value contained in ATA error register
835 * @sk: the sense key we'll fill out
836 * @asc: the additional sense code we'll fill out
837 * @ascq: the additional sense code qualifier we'll fill out
838 * @verbose: be verbose
840 * Converts an ATA error into a SCSI error. Fill out pointers to
841 * SK, ASC, and ASCQ bytes for later use in fixed or descriptor
842 * format sense blocks.
845 * spin_lock_irqsave(host lock)
847 static void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk,
848 u8 *asc, u8 *ascq, int verbose)
852 /* Based on the 3ware driver translation table */
853 static const unsigned char sense_table[][4] = {
855 {0xd1, ABORTED_COMMAND, 0x00, 0x00},
856 // Device busy Aborted command
858 {0xd0, ABORTED_COMMAND, 0x00, 0x00},
859 // Device busy Aborted command
861 {0x61, HARDWARE_ERROR, 0x00, 0x00},
862 // Device fault Hardware error
863 /* ICRC|ABRT */ /* NB: ICRC & !ABRT is BBD */
864 {0x84, ABORTED_COMMAND, 0x47, 0x00},
865 // Data CRC error SCSI parity error
866 /* MC|ID|ABRT|TRK0|MARK */
867 {0x37, NOT_READY, 0x04, 0x00},
868 // Unit offline Not ready
870 {0x09, NOT_READY, 0x04, 0x00},
871 // Unrecovered disk error Not ready
872 /* Bad address mark */
873 {0x01, MEDIUM_ERROR, 0x13, 0x00},
874 // Address mark not found for data field
875 /* TRK0 - Track 0 not found */
876 {0x02, HARDWARE_ERROR, 0x00, 0x00},
878 /* Abort: 0x04 is not translated here, see below */
879 /* Media change request */
880 {0x08, NOT_READY, 0x04, 0x00},
881 // FIXME: faking offline
882 /* SRV/IDNF - ID not found */
883 {0x10, ILLEGAL_REQUEST, 0x21, 0x00},
884 // Logical address out of range
885 /* MC - Media Changed */
886 {0x20, UNIT_ATTENTION, 0x28, 0x00},
887 // Not ready to ready change, medium may have changed
888 /* ECC - Uncorrectable ECC error */
889 {0x40, MEDIUM_ERROR, 0x11, 0x04},
890 // Unrecovered read error
891 /* BBD - block marked bad */
892 {0x80, MEDIUM_ERROR, 0x11, 0x04},
893 // Block marked bad Medium error, unrecovered read error
894 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
896 static const unsigned char stat_table[][4] = {
897 /* Must be first because BUSY means no other bits valid */
898 {0x80, ABORTED_COMMAND, 0x47, 0x00},
899 // Busy, fake parity for now
900 {0x40, ILLEGAL_REQUEST, 0x21, 0x04},
901 // Device ready, unaligned write command
902 {0x20, HARDWARE_ERROR, 0x44, 0x00},
903 // Device fault, internal target failure
904 {0x08, ABORTED_COMMAND, 0x47, 0x00},
905 // Timed out in xfer, fake parity for now
906 {0x04, RECOVERED_ERROR, 0x11, 0x00},
907 // Recovered ECC error Medium error, recovered
908 {0xFF, 0xFF, 0xFF, 0xFF}, // END mark
912 * Is this an error we can process/parse
914 if (drv_stat & ATA_BUSY) {
915 drv_err = 0; /* Ignore the err bits, they're invalid */
919 /* Look for drv_err */
920 for (i = 0; sense_table[i][0] != 0xFF; i++) {
921 /* Look for best matches first */
922 if ((sense_table[i][0] & drv_err) ==
924 *sk = sense_table[i][1];
925 *asc = sense_table[i][2];
926 *ascq = sense_table[i][3];
933 * Fall back to interpreting status bits. Note that if the drv_err
934 * has only the ABRT bit set, we decode drv_stat. ABRT by itself
935 * is not descriptive enough.
937 for (i = 0; stat_table[i][0] != 0xFF; i++) {
938 if (stat_table[i][0] & drv_stat) {
939 *sk = stat_table[i][1];
940 *asc = stat_table[i][2];
941 *ascq = stat_table[i][3];
947 * We need a sensible error return here, which is tricky, and one
948 * that won't cause people to do things like return a disk wrongly.
950 *sk = ABORTED_COMMAND;
956 printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
957 "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
958 id, drv_stat, drv_err, *sk, *asc, *ascq);
963 * ata_gen_passthru_sense - Generate check condition sense block.
964 * @qc: Command that completed.
966 * This function is specific to the ATA descriptor format sense
967 * block specified for the ATA pass through commands. Regardless
968 * of whether the command errored or not, return a sense
969 * block. Copy all controller registers into the sense
970 * block. If there was no error, we get the request from an ATA
971 * passthrough command, so we use the following sense data:
972 * sk = RECOVERED ERROR
973 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
979 static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
981 struct scsi_cmnd *cmd = qc->scsicmd;
982 struct ata_taskfile *tf = &qc->result_tf;
983 unsigned char *sb = cmd->sense_buffer;
984 unsigned char *desc = sb + 8;
985 int verbose = qc->ap->ops->error_handler == NULL;
987 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
989 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
992 * Use ata_to_sense_error() to map status register bits
993 * onto sense key, asc & ascq.
996 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
997 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
998 &sb[1], &sb[2], &sb[3], verbose);
1001 sb[1] = RECOVERED_ERROR;
1007 * Sense data is current and format is descriptor.
1013 /* set length of additional sense data */
1018 * Copy registers into sense buffer.
1021 desc[3] = tf->feature; /* == error reg */
1022 desc[5] = tf->nsect;
1025 desc[11] = tf->lbah;
1026 desc[12] = tf->device;
1027 desc[13] = tf->command; /* == status reg */
1030 * Fill in Extend bit, and the high order bytes
1033 if (tf->flags & ATA_TFLAG_LBA48) {
1035 desc[4] = tf->hob_nsect;
1036 desc[6] = tf->hob_lbal;
1037 desc[8] = tf->hob_lbam;
1038 desc[10] = tf->hob_lbah;
1043 * ata_gen_ata_sense - generate a SCSI fixed sense block
1044 * @qc: Command that we are erroring out
1046 * Generate sense block for a failed ATA command @qc. Descriptor
1047 * format is used to accommodate LBA48 block address.
1052 static void ata_gen_ata_sense(struct ata_queued_cmd *qc)
1054 struct ata_device *dev = qc->dev;
1055 struct scsi_cmnd *cmd = qc->scsicmd;
1056 struct ata_taskfile *tf = &qc->result_tf;
1057 unsigned char *sb = cmd->sense_buffer;
1058 int verbose = qc->ap->ops->error_handler == NULL;
1061 memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
1063 cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
1065 /* sense data is current and format is descriptor */
1068 /* Use ata_to_sense_error() to map status register bits
1069 * onto sense key, asc & ascq.
1072 tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
1073 ata_to_sense_error(qc->ap->print_id, tf->command, tf->feature,
1074 &sb[1], &sb[2], &sb[3], verbose);
1077 /* Could not decode error */
1078 ata_dev_warn(dev, "could not decode error status 0x%x err_mask 0x%x\n",
1079 tf->command, qc->err_mask);
1080 ata_scsi_set_sense(cmd, ABORTED_COMMAND, 0, 0);
1084 block = ata_tf_read_block(&qc->result_tf, dev);
1085 if (block == U64_MAX)
1088 scsi_set_sense_information(sb, SCSI_SENSE_BUFFERSIZE, block);
1091 static void ata_scsi_sdev_config(struct scsi_device *sdev)
1093 sdev->use_10_for_rw = 1;
1094 sdev->use_10_for_ms = 1;
1095 sdev->no_report_opcodes = 1;
1096 sdev->no_write_same = 1;
1098 /* Schedule policy is determined by ->qc_defer() callback and
1099 * it needs to see every deferred qc. Set dev_blocked to 1 to
1100 * prevent SCSI midlayer from automatically deferring
1103 sdev->max_device_blocked = 1;
1107 * atapi_drain_needed - Check whether data transfer may overflow
1108 * @rq: request to be checked
1110 * ATAPI commands which transfer variable length data to host
1111 * might overflow due to application error or hardare bug. This
1112 * function checks whether overflow should be drained and ignored
1119 * 1 if ; otherwise, 0.
1121 static int atapi_drain_needed(struct request *rq)
1123 if (likely(rq->cmd_type != REQ_TYPE_BLOCK_PC))
1126 if (!blk_rq_bytes(rq) || (rq->cmd_flags & REQ_WRITE))
1129 return atapi_cmd_type(rq->cmd[0]) == ATAPI_MISC;
1132 static int ata_scsi_dev_config(struct scsi_device *sdev,
1133 struct ata_device *dev)
1135 struct request_queue *q = sdev->request_queue;
1137 if (!ata_id_has_unload(dev->id))
1138 dev->flags |= ATA_DFLAG_NO_UNLOAD;
1140 /* configure max sectors */
1141 blk_queue_max_hw_sectors(q, dev->max_sectors);
1143 if (dev->class == ATA_DEV_ATAPI) {
1146 sdev->sector_size = ATA_SECT_SIZE;
1148 /* set DMA padding */
1149 blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
1151 /* configure draining */
1152 buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
1154 ata_dev_err(dev, "drain buffer allocation failed\n");
1158 blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
1160 sdev->sector_size = ata_id_logical_sector_size(dev->id);
1161 sdev->manage_start_stop = 1;
1165 * ata_pio_sectors() expects buffer for each sector to not cross
1166 * page boundary. Enforce it by requiring buffers to be sector
1167 * aligned, which works iff sector_size is not larger than
1168 * PAGE_SIZE. ATAPI devices also need the alignment as
1169 * IDENTIFY_PACKET is executed as ATA_PROT_PIO.
1171 if (sdev->sector_size > PAGE_SIZE)
1173 "sector_size=%u > PAGE_SIZE, PIO may malfunction\n",
1176 blk_queue_update_dma_alignment(q, sdev->sector_size - 1);
1178 if (dev->flags & ATA_DFLAG_AN)
1179 set_bit(SDEV_EVT_MEDIA_CHANGE, sdev->supported_events);
1181 if (dev->flags & ATA_DFLAG_NCQ) {
1184 depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
1185 depth = min(ATA_MAX_QUEUE - 1, depth);
1186 scsi_change_queue_depth(sdev, depth);
1189 blk_queue_flush_queueable(q, false);
1196 * ata_scsi_slave_config - Set SCSI device attributes
1197 * @sdev: SCSI device to examine
1199 * This is called before we actually start reading
1200 * and writing to the device, to configure certain
1201 * SCSI mid-layer behaviors.
1204 * Defined by SCSI layer. We don't really care.
1207 int ata_scsi_slave_config(struct scsi_device *sdev)
1209 struct ata_port *ap = ata_shost_to_port(sdev->host);
1210 struct ata_device *dev = __ata_scsi_find_dev(ap, sdev);
1213 ata_scsi_sdev_config(sdev);
1216 rc = ata_scsi_dev_config(sdev, dev);
1222 * ata_scsi_slave_destroy - SCSI device is about to be destroyed
1223 * @sdev: SCSI device to be destroyed
1225 * @sdev is about to be destroyed for hot/warm unplugging. If
1226 * this unplugging was initiated by libata as indicated by NULL
1227 * dev->sdev, this function doesn't have to do anything.
1228 * Otherwise, SCSI layer initiated warm-unplug is in progress.
1229 * Clear dev->sdev, schedule the device for ATA detach and invoke
1233 * Defined by SCSI layer. We don't really care.
1235 void ata_scsi_slave_destroy(struct scsi_device *sdev)
1237 struct ata_port *ap = ata_shost_to_port(sdev->host);
1238 struct request_queue *q = sdev->request_queue;
1239 unsigned long flags;
1240 struct ata_device *dev;
1242 if (!ap->ops->error_handler)
1245 spin_lock_irqsave(ap->lock, flags);
1246 dev = __ata_scsi_find_dev(ap, sdev);
1247 if (dev && dev->sdev) {
1248 /* SCSI device already in CANCEL state, no need to offline it */
1250 dev->flags |= ATA_DFLAG_DETACH;
1251 ata_port_schedule_eh(ap);
1253 spin_unlock_irqrestore(ap->lock, flags);
1255 kfree(q->dma_drain_buffer);
1256 q->dma_drain_buffer = NULL;
1257 q->dma_drain_size = 0;
1261 * __ata_change_queue_depth - helper for ata_scsi_change_queue_depth
1262 * @ap: ATA port to which the device change the queue depth
1263 * @sdev: SCSI device to configure queue depth for
1264 * @queue_depth: new queue depth
1266 * libsas and libata have different approaches for associating a sdev to
1270 int __ata_change_queue_depth(struct ata_port *ap, struct scsi_device *sdev,
1273 struct ata_device *dev;
1274 unsigned long flags;
1276 if (queue_depth < 1 || queue_depth == sdev->queue_depth)
1277 return sdev->queue_depth;
1279 dev = ata_scsi_find_dev(ap, sdev);
1280 if (!dev || !ata_dev_enabled(dev))
1281 return sdev->queue_depth;
1284 spin_lock_irqsave(ap->lock, flags);
1285 dev->flags &= ~ATA_DFLAG_NCQ_OFF;
1286 if (queue_depth == 1 || !ata_ncq_enabled(dev)) {
1287 dev->flags |= ATA_DFLAG_NCQ_OFF;
1290 spin_unlock_irqrestore(ap->lock, flags);
1292 /* limit and apply queue depth */
1293 queue_depth = min(queue_depth, sdev->host->can_queue);
1294 queue_depth = min(queue_depth, ata_id_queue_depth(dev->id));
1295 queue_depth = min(queue_depth, ATA_MAX_QUEUE - 1);
1297 if (sdev->queue_depth == queue_depth)
1300 return scsi_change_queue_depth(sdev, queue_depth);
1304 * ata_scsi_change_queue_depth - SCSI callback for queue depth config
1305 * @sdev: SCSI device to configure queue depth for
1306 * @queue_depth: new queue depth
1308 * This is libata standard hostt->change_queue_depth callback.
1309 * SCSI will call into this callback when user tries to set queue
1313 * SCSI layer (we don't care)
1316 * Newly configured queue depth.
1318 int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
1320 struct ata_port *ap = ata_shost_to_port(sdev->host);
1322 return __ata_change_queue_depth(ap, sdev, queue_depth);
1326 * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
1327 * @qc: Storage for translated ATA taskfile
1329 * Sets up an ATA taskfile to issue STANDBY (to stop) or READ VERIFY
1330 * (to start). Perhaps these commands should be preceded by
1331 * CHECK POWER MODE to see what power mode the device is already in.
1332 * [See SAT revision 5 at www.t10.org]
1335 * spin_lock_irqsave(host lock)
1338 * Zero on success, non-zero on error.
1340 static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
1342 struct scsi_cmnd *scmd = qc->scsicmd;
1343 struct ata_taskfile *tf = &qc->tf;
1344 const u8 *cdb = scmd->cmnd;
1346 if (scmd->cmd_len < 5)
1349 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1350 tf->protocol = ATA_PROT_NODATA;
1352 ; /* ignore IMMED bit, violates sat-r05 */
1355 goto invalid_fld; /* LOEJ bit set not supported */
1356 if (((cdb[4] >> 4) & 0xf) != 0)
1357 goto invalid_fld; /* power conditions not supported */
1360 tf->nsect = 1; /* 1 sector, lba=0 */
1362 if (qc->dev->flags & ATA_DFLAG_LBA) {
1363 tf->flags |= ATA_TFLAG_LBA;
1368 tf->device |= ATA_LBA;
1371 tf->lbal = 0x1; /* sect */
1372 tf->lbam = 0x0; /* cyl low */
1373 tf->lbah = 0x0; /* cyl high */
1376 tf->command = ATA_CMD_VERIFY; /* READ VERIFY */
1378 /* Some odd clown BIOSen issue spindown on power off (ACPI S4
1379 * or S5) causing some drives to spin up and down again.
1381 if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
1382 system_state == SYSTEM_POWER_OFF)
1385 if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
1386 system_entering_hibernation())
1389 /* Issue ATA STANDBY IMMEDIATE command */
1390 tf->command = ATA_CMD_STANDBYNOW1;
1394 * Standby and Idle condition timers could be implemented but that
1395 * would require libata to implement the Power condition mode page
1396 * and allow the user to change it. Changing mode pages requires
1397 * MODE SELECT to be implemented.
1403 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1404 /* "Invalid field in cbd" */
1407 scmd->result = SAM_STAT_GOOD;
1413 * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command
1414 * @qc: Storage for translated ATA taskfile
1416 * Sets up an ATA taskfile to issue FLUSH CACHE or
1420 * spin_lock_irqsave(host lock)
1423 * Zero on success, non-zero on error.
1425 static unsigned int ata_scsi_flush_xlat(struct ata_queued_cmd *qc)
1427 struct ata_taskfile *tf = &qc->tf;
1429 tf->flags |= ATA_TFLAG_DEVICE;
1430 tf->protocol = ATA_PROT_NODATA;
1432 if (qc->dev->flags & ATA_DFLAG_FLUSH_EXT)
1433 tf->command = ATA_CMD_FLUSH_EXT;
1435 tf->command = ATA_CMD_FLUSH;
1437 /* flush is critical for IO integrity, consider it an IO command */
1438 qc->flags |= ATA_QCFLAG_IO;
1444 * scsi_6_lba_len - Get LBA and transfer length
1445 * @cdb: SCSI command to translate
1447 * Calculate LBA and transfer length for 6-byte commands.
1451 * @plen: the transfer length
1453 static void scsi_6_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1458 VPRINTK("six-byte command\n");
1460 lba |= ((u64)(cdb[1] & 0x1f)) << 16;
1461 lba |= ((u64)cdb[2]) << 8;
1462 lba |= ((u64)cdb[3]);
1471 * scsi_10_lba_len - Get LBA and transfer length
1472 * @cdb: SCSI command to translate
1474 * Calculate LBA and transfer length for 10-byte commands.
1478 * @plen: the transfer length
1480 static void scsi_10_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1485 VPRINTK("ten-byte command\n");
1487 lba |= ((u64)cdb[2]) << 24;
1488 lba |= ((u64)cdb[3]) << 16;
1489 lba |= ((u64)cdb[4]) << 8;
1490 lba |= ((u64)cdb[5]);
1492 len |= ((u32)cdb[7]) << 8;
1493 len |= ((u32)cdb[8]);
1500 * scsi_16_lba_len - Get LBA and transfer length
1501 * @cdb: SCSI command to translate
1503 * Calculate LBA and transfer length for 16-byte commands.
1507 * @plen: the transfer length
1509 static void scsi_16_lba_len(const u8 *cdb, u64 *plba, u32 *plen)
1514 VPRINTK("sixteen-byte command\n");
1516 lba |= ((u64)cdb[2]) << 56;
1517 lba |= ((u64)cdb[3]) << 48;
1518 lba |= ((u64)cdb[4]) << 40;
1519 lba |= ((u64)cdb[5]) << 32;
1520 lba |= ((u64)cdb[6]) << 24;
1521 lba |= ((u64)cdb[7]) << 16;
1522 lba |= ((u64)cdb[8]) << 8;
1523 lba |= ((u64)cdb[9]);
1525 len |= ((u32)cdb[10]) << 24;
1526 len |= ((u32)cdb[11]) << 16;
1527 len |= ((u32)cdb[12]) << 8;
1528 len |= ((u32)cdb[13]);
1535 * ata_scsi_verify_xlat - Translate SCSI VERIFY command into an ATA one
1536 * @qc: Storage for translated ATA taskfile
1538 * Converts SCSI VERIFY command to an ATA READ VERIFY command.
1541 * spin_lock_irqsave(host lock)
1544 * Zero on success, non-zero on error.
1546 static unsigned int ata_scsi_verify_xlat(struct ata_queued_cmd *qc)
1548 struct scsi_cmnd *scmd = qc->scsicmd;
1549 struct ata_taskfile *tf = &qc->tf;
1550 struct ata_device *dev = qc->dev;
1551 u64 dev_sectors = qc->dev->n_sectors;
1552 const u8 *cdb = scmd->cmnd;
1556 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
1557 tf->protocol = ATA_PROT_NODATA;
1559 if (cdb[0] == VERIFY) {
1560 if (scmd->cmd_len < 10)
1562 scsi_10_lba_len(cdb, &block, &n_block);
1563 } else if (cdb[0] == VERIFY_16) {
1564 if (scmd->cmd_len < 16)
1566 scsi_16_lba_len(cdb, &block, &n_block);
1572 if (block >= dev_sectors)
1574 if ((block + n_block) > dev_sectors)
1577 if (dev->flags & ATA_DFLAG_LBA) {
1578 tf->flags |= ATA_TFLAG_LBA;
1580 if (lba_28_ok(block, n_block)) {
1582 tf->command = ATA_CMD_VERIFY;
1583 tf->device |= (block >> 24) & 0xf;
1584 } else if (lba_48_ok(block, n_block)) {
1585 if (!(dev->flags & ATA_DFLAG_LBA48))
1589 tf->flags |= ATA_TFLAG_LBA48;
1590 tf->command = ATA_CMD_VERIFY_EXT;
1592 tf->hob_nsect = (n_block >> 8) & 0xff;
1594 tf->hob_lbah = (block >> 40) & 0xff;
1595 tf->hob_lbam = (block >> 32) & 0xff;
1596 tf->hob_lbal = (block >> 24) & 0xff;
1598 /* request too large even for LBA48 */
1601 tf->nsect = n_block & 0xff;
1603 tf->lbah = (block >> 16) & 0xff;
1604 tf->lbam = (block >> 8) & 0xff;
1605 tf->lbal = block & 0xff;
1607 tf->device |= ATA_LBA;
1610 u32 sect, head, cyl, track;
1612 if (!lba_28_ok(block, n_block))
1615 /* Convert LBA to CHS */
1616 track = (u32)block / dev->sectors;
1617 cyl = track / dev->heads;
1618 head = track % dev->heads;
1619 sect = (u32)block % dev->sectors + 1;
1621 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
1622 (u32)block, track, cyl, head, sect);
1624 /* Check whether the converted CHS can fit.
1628 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
1631 tf->command = ATA_CMD_VERIFY;
1632 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
1635 tf->lbah = cyl >> 8;
1642 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1643 /* "Invalid field in cbd" */
1647 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1648 /* "Logical Block Address out of range" */
1652 scmd->result = SAM_STAT_GOOD;
1657 * ata_scsi_rw_xlat - Translate SCSI r/w command into an ATA one
1658 * @qc: Storage for translated ATA taskfile
1660 * Converts any of six SCSI read/write commands into the
1661 * ATA counterpart, including starting sector (LBA),
1662 * sector count, and taking into account the device's LBA48
1665 * Commands %READ_6, %READ_10, %READ_16, %WRITE_6, %WRITE_10, and
1666 * %WRITE_16 are currently supported.
1669 * spin_lock_irqsave(host lock)
1672 * Zero on success, non-zero on error.
1674 static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
1676 struct scsi_cmnd *scmd = qc->scsicmd;
1677 const u8 *cdb = scmd->cmnd;
1678 unsigned int tf_flags = 0;
1683 if (cdb[0] == WRITE_10 || cdb[0] == WRITE_6 || cdb[0] == WRITE_16)
1684 tf_flags |= ATA_TFLAG_WRITE;
1686 /* Calculate the SCSI LBA, transfer length and FUA. */
1690 if (unlikely(scmd->cmd_len < 10))
1692 scsi_10_lba_len(cdb, &block, &n_block);
1693 if (cdb[1] & (1 << 3))
1694 tf_flags |= ATA_TFLAG_FUA;
1698 if (unlikely(scmd->cmd_len < 6))
1700 scsi_6_lba_len(cdb, &block, &n_block);
1702 /* for 6-byte r/w commands, transfer length 0
1703 * means 256 blocks of data, not 0 block.
1710 if (unlikely(scmd->cmd_len < 16))
1712 scsi_16_lba_len(cdb, &block, &n_block);
1713 if (cdb[1] & (1 << 3))
1714 tf_flags |= ATA_TFLAG_FUA;
1717 DPRINTK("no-byte command\n");
1721 /* Check and compose ATA command */
1723 /* For 10-byte and 16-byte SCSI R/W commands, transfer
1724 * length 0 means transfer 0 block of data.
1725 * However, for ATA R/W commands, sector count 0 means
1726 * 256 or 65536 sectors, not 0 sectors as in SCSI.
1728 * WARNING: one or two older ATA drives treat 0 as 0...
1732 qc->flags |= ATA_QCFLAG_IO;
1733 qc->nbytes = n_block * scmd->device->sector_size;
1735 rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
1737 if (likely(rc == 0))
1742 /* treat all other errors as -EINVAL, fall through */
1744 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
1745 /* "Invalid field in cbd" */
1749 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x21, 0x0);
1750 /* "Logical Block Address out of range" */
1754 scmd->result = SAM_STAT_GOOD;
1758 static void ata_qc_done(struct ata_queued_cmd *qc)
1760 struct scsi_cmnd *cmd = qc->scsicmd;
1761 void (*done)(struct scsi_cmnd *) = qc->scsidone;
1767 static void ata_scsi_qc_complete(struct ata_queued_cmd *qc)
1769 struct ata_port *ap = qc->ap;
1770 struct scsi_cmnd *cmd = qc->scsicmd;
1771 u8 *cdb = cmd->cmnd;
1772 int need_sense = (qc->err_mask != 0);
1774 /* For ATA pass thru (SAT) commands, generate a sense block if
1775 * user mandated it or if there's an error. Note that if we
1776 * generate because the user forced us to [CK_COND =1], a check
1777 * condition is generated and the ATA register values are returned
1778 * whether the command completed successfully or not. If there
1779 * was no error, we use the following sense data:
1780 * sk = RECOVERED ERROR
1781 * asc,ascq = ATA PASS-THROUGH INFORMATION AVAILABLE
1783 if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
1784 ((cdb[2] & 0x20) || need_sense))
1785 ata_gen_passthru_sense(qc);
1786 else if (qc->flags & ATA_QCFLAG_SENSE_VALID)
1787 cmd->result = SAM_STAT_CHECK_CONDITION;
1788 else if (need_sense)
1789 ata_gen_ata_sense(qc);
1791 cmd->result = SAM_STAT_GOOD;
1793 if (need_sense && !ap->ops->error_handler)
1794 ata_dump_status(ap->print_id, &qc->result_tf);
1800 * ata_scsi_translate - Translate then issue SCSI command to ATA device
1801 * @dev: ATA device to which the command is addressed
1802 * @cmd: SCSI command to execute
1803 * @xlat_func: Actor which translates @cmd to an ATA taskfile
1805 * Our ->queuecommand() function has decided that the SCSI
1806 * command issued can be directly translated into an ATA
1807 * command, rather than handled internally.
1809 * This function sets up an ata_queued_cmd structure for the
1810 * SCSI command, and sends that ata_queued_cmd to the hardware.
1812 * The xlat_func argument (actor) returns 0 if ready to execute
1813 * ATA command, else 1 to finish translation. If 1 is returned
1814 * then cmd->result (and possibly cmd->sense_buffer) are assumed
1815 * to be set reflecting an error condition or clean (early)
1819 * spin_lock_irqsave(host lock)
1822 * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
1823 * needs to be deferred.
1825 static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
1826 ata_xlat_func_t xlat_func)
1828 struct ata_port *ap = dev->link->ap;
1829 struct ata_queued_cmd *qc;
1834 qc = ata_scsi_qc_new(dev, cmd);
1838 /* data is present; dma-map it */
1839 if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
1840 cmd->sc_data_direction == DMA_TO_DEVICE) {
1841 if (unlikely(scsi_bufflen(cmd) < 1)) {
1842 ata_dev_warn(dev, "WARNING: zero len r/w req\n");
1846 ata_sg_init(qc, scsi_sglist(cmd), scsi_sg_count(cmd));
1848 qc->dma_dir = cmd->sc_data_direction;
1851 qc->complete_fn = ata_scsi_qc_complete;
1856 if (ap->ops->qc_defer) {
1857 if ((rc = ap->ops->qc_defer(qc)))
1861 /* select device, send command to hardware */
1869 cmd->scsi_done(cmd);
1870 DPRINTK("EXIT - early finish (good or error)\n");
1875 cmd->result = (DID_ERROR << 16);
1876 cmd->scsi_done(cmd);
1878 DPRINTK("EXIT - internal\n");
1883 DPRINTK("EXIT - defer\n");
1884 if (rc == ATA_DEFER_LINK)
1885 return SCSI_MLQUEUE_DEVICE_BUSY;
1887 return SCSI_MLQUEUE_HOST_BUSY;
1891 * ata_scsi_rbuf_get - Map response buffer.
1892 * @cmd: SCSI command containing buffer to be mapped.
1893 * @flags: unsigned long variable to store irq enable status
1894 * @copy_in: copy in from user buffer
1896 * Prepare buffer for simulated SCSI commands.
1899 * spin_lock_irqsave(ata_scsi_rbuf_lock) on success
1902 * Pointer to response buffer.
1904 static void *ata_scsi_rbuf_get(struct scsi_cmnd *cmd, bool copy_in,
1905 unsigned long *flags)
1907 spin_lock_irqsave(&ata_scsi_rbuf_lock, *flags);
1909 memset(ata_scsi_rbuf, 0, ATA_SCSI_RBUF_SIZE);
1911 sg_copy_to_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1912 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1913 return ata_scsi_rbuf;
1917 * ata_scsi_rbuf_put - Unmap response buffer.
1918 * @cmd: SCSI command containing buffer to be unmapped.
1919 * @copy_out: copy out result
1920 * @flags: @flags passed to ata_scsi_rbuf_get()
1922 * Returns rbuf buffer. The result is copied to @cmd's buffer if
1923 * @copy_back is true.
1926 * Unlocks ata_scsi_rbuf_lock.
1928 static inline void ata_scsi_rbuf_put(struct scsi_cmnd *cmd, bool copy_out,
1929 unsigned long *flags)
1932 sg_copy_from_buffer(scsi_sglist(cmd), scsi_sg_count(cmd),
1933 ata_scsi_rbuf, ATA_SCSI_RBUF_SIZE);
1934 spin_unlock_irqrestore(&ata_scsi_rbuf_lock, *flags);
1938 * ata_scsi_rbuf_fill - wrapper for SCSI command simulators
1939 * @args: device IDENTIFY data / SCSI command of interest.
1940 * @actor: Callback hook for desired SCSI command simulator
1942 * Takes care of the hard work of simulating a SCSI command...
1943 * Mapping the response buffer, calling the command's handler,
1944 * and handling the handler's return value. This return value
1945 * indicates whether the handler wishes the SCSI command to be
1946 * completed successfully (0), or not (in which case cmd->result
1947 * and sense buffer are assumed to be set).
1950 * spin_lock_irqsave(host lock)
1952 static void ata_scsi_rbuf_fill(struct ata_scsi_args *args,
1953 unsigned int (*actor)(struct ata_scsi_args *args, u8 *rbuf))
1957 struct scsi_cmnd *cmd = args->cmd;
1958 unsigned long flags;
1960 rbuf = ata_scsi_rbuf_get(cmd, false, &flags);
1961 rc = actor(args, rbuf);
1962 ata_scsi_rbuf_put(cmd, rc == 0, &flags);
1965 cmd->result = SAM_STAT_GOOD;
1970 * ata_scsiop_inq_std - Simulate INQUIRY command
1971 * @args: device IDENTIFY data / SCSI command of interest.
1972 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
1974 * Returns standard device identification data associated
1975 * with non-VPD INQUIRY command output.
1978 * spin_lock_irqsave(host lock)
1980 static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf)
1982 const u8 versions[] = {
1984 0x60, /* SAM-3 (no version claimed) */
1987 0x20, /* SBC-2 (no version claimed) */
1990 0x60 /* SPC-3 (no version claimed) */
1992 const u8 versions_zbc[] = {
1994 0xA0, /* SAM-5 (no version claimed) */
1997 0xC0, /* SBC-3 (no version claimed) */
2000 0x60, /* SPC-4 (no version claimed) */
2003 0x20, /* ZBC (no version claimed) */
2009 0x5, /* claim SPC-3 version compatibility */
2016 /* set scsi removable (RMB) bit per ata bit, or if the
2017 * AHCI port says it's external (Hotplug-capable, eSATA).
2019 if (ata_id_removable(args->id) ||
2020 (args->dev->link->ap->pflags & ATA_PFLAG_EXTERNAL))
2023 if (args->dev->class == ATA_DEV_ZAC) {
2025 hdr[2] = 0x6; /* ZBC is defined in SPC-4 */
2028 memcpy(rbuf, hdr, sizeof(hdr));
2029 memcpy(&rbuf[8], "ATA ", 8);
2030 ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16);
2032 /* From SAT, use last 2 words from fw rev unless they are spaces */
2033 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV + 2, 4);
2034 if (strncmp(&rbuf[32], " ", 4) == 0)
2035 ata_id_string(args->id, &rbuf[32], ATA_ID_FW_REV, 4);
2037 if (rbuf[32] == 0 || rbuf[32] == ' ')
2038 memcpy(&rbuf[32], "n/a ", 4);
2040 if (args->dev->class == ATA_DEV_ZAC)
2041 memcpy(rbuf + 58, versions_zbc, sizeof(versions_zbc));
2043 memcpy(rbuf + 58, versions, sizeof(versions));
2049 * ata_scsiop_inq_00 - Simulate INQUIRY VPD page 0, list of pages
2050 * @args: device IDENTIFY data / SCSI command of interest.
2051 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2053 * Returns list of inquiry VPD pages available.
2056 * spin_lock_irqsave(host lock)
2058 static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
2060 const u8 pages[] = {
2061 0x00, /* page 0x00, this page */
2062 0x80, /* page 0x80, unit serial no page */
2063 0x83, /* page 0x83, device ident page */
2064 0x89, /* page 0x89, ata info page */
2065 0xb0, /* page 0xb0, block limits page */
2066 0xb1, /* page 0xb1, block device characteristics page */
2067 0xb2, /* page 0xb2, thin provisioning page */
2070 rbuf[3] = sizeof(pages); /* number of supported VPD pages */
2071 memcpy(rbuf + 4, pages, sizeof(pages));
2076 * ata_scsiop_inq_80 - Simulate INQUIRY VPD page 80, device serial number
2077 * @args: device IDENTIFY data / SCSI command of interest.
2078 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2080 * Returns ATA device serial number.
2083 * spin_lock_irqsave(host lock)
2085 static unsigned int ata_scsiop_inq_80(struct ata_scsi_args *args, u8 *rbuf)
2089 0x80, /* this page code */
2091 ATA_ID_SERNO_LEN, /* page len */
2094 memcpy(rbuf, hdr, sizeof(hdr));
2095 ata_id_string(args->id, (unsigned char *) &rbuf[4],
2096 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2101 * ata_scsiop_inq_83 - Simulate INQUIRY VPD page 83, device identity
2102 * @args: device IDENTIFY data / SCSI command of interest.
2103 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2105 * Yields two logical unit device identification designators:
2106 * - vendor specific ASCII containing the ATA serial number
2107 * - SAT defined "t10 vendor id based" containing ASCII vendor
2108 * name ("ATA "), model and serial numbers.
2111 * spin_lock_irqsave(host lock)
2113 static unsigned int ata_scsiop_inq_83(struct ata_scsi_args *args, u8 *rbuf)
2115 const int sat_model_serial_desc_len = 68;
2118 rbuf[1] = 0x83; /* this page code */
2121 /* piv=0, assoc=lu, code_set=ACSII, designator=vendor */
2123 rbuf[num + 3] = ATA_ID_SERNO_LEN;
2125 ata_id_string(args->id, (unsigned char *) rbuf + num,
2126 ATA_ID_SERNO, ATA_ID_SERNO_LEN);
2127 num += ATA_ID_SERNO_LEN;
2129 /* SAT defined lu model and serial numbers descriptor */
2130 /* piv=0, assoc=lu, code_set=ACSII, designator=t10 vendor id */
2133 rbuf[num + 3] = sat_model_serial_desc_len;
2135 memcpy(rbuf + num, "ATA ", 8);
2137 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_PROD,
2139 num += ATA_ID_PROD_LEN;
2140 ata_id_string(args->id, (unsigned char *) rbuf + num, ATA_ID_SERNO,
2142 num += ATA_ID_SERNO_LEN;
2144 if (ata_id_has_wwn(args->id)) {
2145 /* SAT defined lu world wide name */
2146 /* piv=0, assoc=lu, code_set=binary, designator=NAA */
2149 rbuf[num + 3] = ATA_ID_WWN_LEN;
2151 ata_id_string(args->id, (unsigned char *) rbuf + num,
2152 ATA_ID_WWN, ATA_ID_WWN_LEN);
2153 num += ATA_ID_WWN_LEN;
2155 rbuf[3] = num - 4; /* page len (assume less than 256 bytes) */
2160 * ata_scsiop_inq_89 - Simulate INQUIRY VPD page 89, ATA info
2161 * @args: device IDENTIFY data / SCSI command of interest.
2162 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2164 * Yields SAT-specified ATA VPD page.
2167 * spin_lock_irqsave(host lock)
2169 static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
2171 struct ata_taskfile tf;
2173 memset(&tf, 0, sizeof(tf));
2175 rbuf[1] = 0x89; /* our page code */
2176 rbuf[2] = (0x238 >> 8); /* page size fixed at 238h */
2177 rbuf[3] = (0x238 & 0xff);
2179 memcpy(&rbuf[8], "linux ", 8);
2180 memcpy(&rbuf[16], "libata ", 16);
2181 memcpy(&rbuf[32], DRV_VERSION, 4);
2183 /* we don't store the ATA device signature, so we fake it */
2185 tf.command = ATA_DRDY; /* really, this is Status reg */
2189 ata_tf_to_fis(&tf, 0, 1, &rbuf[36]); /* TODO: PMP? */
2190 rbuf[36] = 0x34; /* force D2H Reg FIS (34h) */
2192 rbuf[56] = ATA_CMD_ID_ATA;
2194 memcpy(&rbuf[60], &args->id[0], 512);
2198 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
2203 rbuf[3] = 0x3c; /* required VPD size with unmap support */
2206 * Optimal transfer length granularity.
2208 * This is always one physical block, but for disks with a smaller
2209 * logical than physical sector size we need to figure out what the
2212 min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
2213 put_unaligned_be16(min_io_sectors, &rbuf[6]);
2216 * Optimal unmap granularity.
2218 * The ATA spec doesn't even know about a granularity or alignment
2219 * for the TRIM command. We can leave away most of the unmap related
2220 * VPD page entries, but we have specifify a granularity to signal
2221 * that we support some form of unmap - in thise case via WRITE SAME
2222 * with the unmap bit set.
2224 if (ata_id_has_trim(args->id)) {
2225 put_unaligned_be64(65535 * 512 / 8, &rbuf[36]);
2226 put_unaligned_be32(1, &rbuf[28]);
2232 static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
2234 int form_factor = ata_id_form_factor(args->id);
2235 int media_rotation_rate = ata_id_rotation_rate(args->id);
2239 rbuf[4] = media_rotation_rate >> 8;
2240 rbuf[5] = media_rotation_rate;
2241 rbuf[7] = form_factor;
2246 static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
2248 /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
2251 rbuf[5] = 1 << 6; /* TPWS */
2257 * ata_scsiop_noop - Command handler that simply returns success.
2258 * @args: device IDENTIFY data / SCSI command of interest.
2259 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2261 * No operation. Simply returns success to caller, to indicate
2262 * that the caller should successfully complete this SCSI command.
2265 * spin_lock_irqsave(host lock)
2267 static unsigned int ata_scsiop_noop(struct ata_scsi_args *args, u8 *rbuf)
2274 * modecpy - Prepare response for MODE SENSE
2275 * @dest: output buffer
2276 * @src: data being copied
2277 * @n: length of mode page
2278 * @changeable: whether changeable parameters are requested
2280 * Generate a generic MODE SENSE page for either current or changeable
2286 static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
2289 memcpy(dest, src, 2);
2290 memset(dest + 2, 0, n - 2);
2292 memcpy(dest, src, n);
2297 * ata_msense_caching - Simulate MODE SENSE caching info page
2298 * @id: device IDENTIFY data
2299 * @buf: output buffer
2300 * @changeable: whether changeable parameters are requested
2302 * Generate a caching info page, which conditionally indicates
2303 * write caching to the SCSI layer, depending on device
2309 static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
2311 modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
2312 if (changeable || ata_id_wcache_enabled(id))
2313 buf[2] |= (1 << 2); /* write cache enable */
2314 if (!changeable && !ata_id_rahead_enabled(id))
2315 buf[12] |= (1 << 5); /* disable read ahead */
2316 return sizeof(def_cache_mpage);
2320 * ata_msense_ctl_mode - Simulate MODE SENSE control mode page
2321 * @buf: output buffer
2322 * @changeable: whether changeable parameters are requested
2324 * Generate a generic MODE SENSE control mode page.
2329 static unsigned int ata_msense_ctl_mode(u8 *buf, bool changeable)
2331 modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable);
2332 return sizeof(def_control_mpage);
2336 * ata_msense_rw_recovery - Simulate MODE SENSE r/w error recovery page
2337 * @buf: output buffer
2338 * @changeable: whether changeable parameters are requested
2340 * Generate a generic MODE SENSE r/w error recovery page.
2345 static unsigned int ata_msense_rw_recovery(u8 *buf, bool changeable)
2347 modecpy(buf, def_rw_recovery_mpage, sizeof(def_rw_recovery_mpage),
2349 return sizeof(def_rw_recovery_mpage);
2353 * We can turn this into a real blacklist if it's needed, for now just
2354 * blacklist any Maxtor BANC1G10 revision firmware
2356 static int ata_dev_supports_fua(u16 *id)
2358 unsigned char model[ATA_ID_PROD_LEN + 1], fw[ATA_ID_FW_REV_LEN + 1];
2362 if (!ata_id_has_fua(id))
2365 ata_id_c_string(id, model, ATA_ID_PROD, sizeof(model));
2366 ata_id_c_string(id, fw, ATA_ID_FW_REV, sizeof(fw));
2368 if (strcmp(model, "Maxtor"))
2370 if (strcmp(fw, "BANC1G10"))
2373 return 0; /* blacklisted */
2377 * ata_scsiop_mode_sense - Simulate MODE SENSE 6, 10 commands
2378 * @args: device IDENTIFY data / SCSI command of interest.
2379 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2381 * Simulate MODE SENSE commands. Assume this is invoked for direct
2382 * access devices (e.g. disks) only. There should be no block
2383 * descriptor for other device types.
2386 * spin_lock_irqsave(host lock)
2388 static unsigned int ata_scsiop_mode_sense(struct ata_scsi_args *args, u8 *rbuf)
2390 struct ata_device *dev = args->dev;
2391 u8 *scsicmd = args->cmd->cmnd, *p = rbuf;
2392 const u8 sat_blk_desc[] = {
2393 0, 0, 0, 0, /* number of blocks: sat unspecified */
2395 0, 0x2, 0x0 /* block length: 512 bytes */
2398 unsigned int ebd, page_control, six_byte;
2403 six_byte = (scsicmd[0] == MODE_SENSE);
2404 ebd = !(scsicmd[1] & 0x8); /* dbd bit inverted == edb */
2406 * LLBA bit in msense(10) ignored (compliant)
2409 page_control = scsicmd[2] >> 6;
2410 switch (page_control) {
2411 case 0: /* current */
2412 case 1: /* changeable */
2413 case 2: /* defaults */
2414 break; /* supported */
2416 goto saving_not_supp;
2422 p += 4 + (ebd ? 8 : 0);
2424 p += 8 + (ebd ? 8 : 0);
2426 pg = scsicmd[2] & 0x3f;
2429 * No mode subpages supported (yet) but asking for _all_
2430 * subpages may be valid
2432 if (spg && (spg != ALL_SUB_MPAGES))
2436 case RW_RECOVERY_MPAGE:
2437 p += ata_msense_rw_recovery(p, page_control == 1);
2441 p += ata_msense_caching(args->id, p, page_control == 1);
2445 p += ata_msense_ctl_mode(p, page_control == 1);
2449 p += ata_msense_rw_recovery(p, page_control == 1);
2450 p += ata_msense_caching(args->id, p, page_control == 1);
2451 p += ata_msense_ctl_mode(p, page_control == 1);
2454 default: /* invalid page code */
2459 if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
2460 (!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
2464 rbuf[0] = p - rbuf - 1;
2467 rbuf[3] = sizeof(sat_blk_desc);
2468 memcpy(rbuf + 4, sat_blk_desc, sizeof(sat_blk_desc));
2471 unsigned int output_len = p - rbuf - 2;
2473 rbuf[0] = output_len >> 8;
2474 rbuf[1] = output_len;
2477 rbuf[7] = sizeof(sat_blk_desc);
2478 memcpy(rbuf + 8, sat_blk_desc, sizeof(sat_blk_desc));
2484 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x24, 0x0);
2485 /* "Invalid field in cbd" */
2489 ata_scsi_set_sense(args->cmd, ILLEGAL_REQUEST, 0x39, 0x0);
2490 /* "Saving parameters not supported" */
2495 * ata_scsiop_read_cap - Simulate READ CAPACITY[ 16] commands
2496 * @args: device IDENTIFY data / SCSI command of interest.
2497 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2499 * Simulate READ CAPACITY commands.
2504 static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
2506 struct ata_device *dev = args->dev;
2507 u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
2508 u32 sector_size; /* physical sector size in bytes */
2512 sector_size = ata_id_logical_sector_size(dev->id);
2513 log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
2514 lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);
2518 if (args->cmd->cmnd[0] == READ_CAPACITY) {
2519 if (last_lba >= 0xffffffffULL)
2520 last_lba = 0xffffffff;
2522 /* sector count, 32-bit */
2523 rbuf[0] = last_lba >> (8 * 3);
2524 rbuf[1] = last_lba >> (8 * 2);
2525 rbuf[2] = last_lba >> (8 * 1);
2529 rbuf[4] = sector_size >> (8 * 3);
2530 rbuf[5] = sector_size >> (8 * 2);
2531 rbuf[6] = sector_size >> (8 * 1);
2532 rbuf[7] = sector_size;
2534 /* sector count, 64-bit */
2535 rbuf[0] = last_lba >> (8 * 7);
2536 rbuf[1] = last_lba >> (8 * 6);
2537 rbuf[2] = last_lba >> (8 * 5);
2538 rbuf[3] = last_lba >> (8 * 4);
2539 rbuf[4] = last_lba >> (8 * 3);
2540 rbuf[5] = last_lba >> (8 * 2);
2541 rbuf[6] = last_lba >> (8 * 1);
2545 rbuf[ 8] = sector_size >> (8 * 3);
2546 rbuf[ 9] = sector_size >> (8 * 2);
2547 rbuf[10] = sector_size >> (8 * 1);
2548 rbuf[11] = sector_size;
2551 rbuf[13] = log2_per_phys;
2552 rbuf[14] = (lowest_aligned >> 8) & 0x3f;
2553 rbuf[15] = lowest_aligned;
2555 if (ata_id_has_trim(args->id) &&
2556 !(dev->horkage & ATA_HORKAGE_NOTRIM)) {
2557 rbuf[14] |= 0x80; /* LBPME */
2559 if (ata_id_has_zero_after_trim(args->id) &&
2560 dev->horkage & ATA_HORKAGE_ZERO_AFTER_TRIM) {
2561 ata_dev_info(dev, "Enabling discard_zeroes_data\n");
2562 rbuf[14] |= 0x40; /* LBPRZ */
2570 * ata_scsiop_report_luns - Simulate REPORT LUNS command
2571 * @args: device IDENTIFY data / SCSI command of interest.
2572 * @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
2574 * Simulate REPORT LUNS command.
2577 * spin_lock_irqsave(host lock)
2579 static unsigned int ata_scsiop_report_luns(struct ata_scsi_args *args, u8 *rbuf)
2582 rbuf[3] = 8; /* just one lun, LUN 0, size 8 bytes */
2587 static void atapi_sense_complete(struct ata_queued_cmd *qc)
2589 if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) {
2590 /* FIXME: not quite right; we don't want the
2591 * translation of taskfile registers into
2592 * a sense descriptors, since that's only
2593 * correct for ATA, not ATAPI
2595 ata_gen_passthru_sense(qc);
2601 /* is it pointless to prefer PIO for "safety reasons"? */
2602 static inline int ata_pio_use_silly(struct ata_port *ap)
2604 return (ap->flags & ATA_FLAG_PIO_DMA);
2607 static void atapi_request_sense(struct ata_queued_cmd *qc)
2609 struct ata_port *ap = qc->ap;
2610 struct scsi_cmnd *cmd = qc->scsicmd;
2612 DPRINTK("ATAPI request sense\n");
2614 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
2616 #ifdef CONFIG_ATA_SFF
2617 if (ap->ops->sff_tf_read)
2618 ap->ops->sff_tf_read(ap, &qc->tf);
2621 /* fill these in, for the case where they are -not- overwritten */
2622 cmd->sense_buffer[0] = 0x70;
2623 cmd->sense_buffer[2] = qc->tf.feature >> 4;
2627 /* setup sg table and init transfer direction */
2628 sg_init_one(&qc->sgent, cmd->sense_buffer, SCSI_SENSE_BUFFERSIZE);
2629 ata_sg_init(qc, &qc->sgent, 1);
2630 qc->dma_dir = DMA_FROM_DEVICE;
2632 memset(&qc->cdb, 0, qc->dev->cdb_len);
2633 qc->cdb[0] = REQUEST_SENSE;
2634 qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
2636 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2637 qc->tf.command = ATA_CMD_PACKET;
2639 if (ata_pio_use_silly(ap)) {
2640 qc->tf.protocol = ATAPI_PROT_DMA;
2641 qc->tf.feature |= ATAPI_PKT_DMA;
2643 qc->tf.protocol = ATAPI_PROT_PIO;
2644 qc->tf.lbam = SCSI_SENSE_BUFFERSIZE;
2647 qc->nbytes = SCSI_SENSE_BUFFERSIZE;
2649 qc->complete_fn = atapi_sense_complete;
2656 static void atapi_qc_complete(struct ata_queued_cmd *qc)
2658 struct scsi_cmnd *cmd = qc->scsicmd;
2659 unsigned int err_mask = qc->err_mask;
2661 VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
2663 /* handle completion from new EH */
2664 if (unlikely(qc->ap->ops->error_handler &&
2665 (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
2667 if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
2668 /* FIXME: not quite right; we don't want the
2669 * translation of taskfile registers into a
2670 * sense descriptors, since that's only
2671 * correct for ATA, not ATAPI
2673 ata_gen_passthru_sense(qc);
2676 /* SCSI EH automatically locks door if sdev->locked is
2677 * set. Sometimes door lock request continues to
2678 * fail, for example, when no media is present. This
2679 * creates a loop - SCSI EH issues door lock which
2680 * fails and gets invoked again to acquire sense data
2681 * for the failed command.
2683 * If door lock fails, always clear sdev->locked to
2684 * avoid this infinite loop.
2686 * This may happen before SCSI scan is complete. Make
2687 * sure qc->dev->sdev isn't NULL before dereferencing.
2689 if (qc->cdb[0] == ALLOW_MEDIUM_REMOVAL && qc->dev->sdev)
2690 qc->dev->sdev->locked = 0;
2692 qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
2697 /* successful completion or old EH failure path */
2698 if (unlikely(err_mask & AC_ERR_DEV)) {
2699 cmd->result = SAM_STAT_CHECK_CONDITION;
2700 atapi_request_sense(qc);
2702 } else if (unlikely(err_mask)) {
2703 /* FIXME: not quite right; we don't want the
2704 * translation of taskfile registers into
2705 * a sense descriptors, since that's only
2706 * correct for ATA, not ATAPI
2708 ata_gen_passthru_sense(qc);
2710 u8 *scsicmd = cmd->cmnd;
2712 if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) {
2713 unsigned long flags;
2716 buf = ata_scsi_rbuf_get(cmd, true, &flags);
2718 /* ATAPI devices typically report zero for their SCSI version,
2719 * and sometimes deviate from the spec WRT response data
2720 * format. If SCSI version is reported as zero like normal,
2721 * then we make the following fixups: 1) Fake MMC-5 version,
2722 * to indicate to the Linux scsi midlayer this is a modern
2723 * device. 2) Ensure response data format / ATAPI information
2724 * are always correct.
2731 ata_scsi_rbuf_put(cmd, true, &flags);
2734 cmd->result = SAM_STAT_GOOD;
2740 * atapi_xlat - Initialize PACKET taskfile
2741 * @qc: command structure to be initialized
2744 * spin_lock_irqsave(host lock)
2747 * Zero on success, non-zero on failure.
2749 static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
2751 struct scsi_cmnd *scmd = qc->scsicmd;
2752 struct ata_device *dev = qc->dev;
2753 int nodata = (scmd->sc_data_direction == DMA_NONE);
2754 int using_pio = !nodata && (dev->flags & ATA_DFLAG_PIO);
2755 unsigned int nbytes;
2757 memset(qc->cdb, 0, dev->cdb_len);
2758 memcpy(qc->cdb, scmd->cmnd, scmd->cmd_len);
2760 qc->complete_fn = atapi_qc_complete;
2762 qc->tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2763 if (scmd->sc_data_direction == DMA_TO_DEVICE) {
2764 qc->tf.flags |= ATA_TFLAG_WRITE;
2765 DPRINTK("direction: write\n");
2768 qc->tf.command = ATA_CMD_PACKET;
2769 ata_qc_set_pc_nbytes(qc);
2771 /* check whether ATAPI DMA is safe */
2772 if (!nodata && !using_pio && atapi_check_dma(qc))
2775 /* Some controller variants snoop this value for Packet
2776 * transfers to do state machine and FIFO management. Thus we
2777 * want to set it properly, and for DMA where it is
2778 * effectively meaningless.
2780 nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
2782 /* Most ATAPI devices which honor transfer chunk size don't
2783 * behave according to the spec when odd chunk size which
2784 * matches the transfer length is specified. If the number of
2785 * bytes to transfer is 2n+1. According to the spec, what
2786 * should happen is to indicate that 2n+1 is going to be
2787 * transferred and transfer 2n+2 bytes where the last byte is
2790 * In practice, this doesn't happen. ATAPI devices first
2791 * indicate and transfer 2n bytes and then indicate and
2792 * transfer 2 bytes where the last byte is padding.
2794 * This inconsistency confuses several controllers which
2795 * perform PIO using DMA such as Intel AHCIs and sil3124/32.
2796 * These controllers use actual number of transferred bytes to
2797 * update DMA poitner and transfer of 4n+2 bytes make those
2798 * controller push DMA pointer by 4n+4 bytes because SATA data
2799 * FISes are aligned to 4 bytes. This causes data corruption
2800 * and buffer overrun.
2802 * Always setting nbytes to even number solves this problem
2803 * because then ATAPI devices don't have to split data at 2n
2809 qc->tf.lbam = (nbytes & 0xFF);
2810 qc->tf.lbah = (nbytes >> 8);
2813 qc->tf.protocol = ATAPI_PROT_NODATA;
2815 qc->tf.protocol = ATAPI_PROT_PIO;
2818 qc->tf.protocol = ATAPI_PROT_DMA;
2819 qc->tf.feature |= ATAPI_PKT_DMA;
2821 if ((dev->flags & ATA_DFLAG_DMADIR) &&
2822 (scmd->sc_data_direction != DMA_TO_DEVICE))
2823 /* some SATA bridges need us to indicate data xfer direction */
2824 qc->tf.feature |= ATAPI_DMADIR;
2828 /* FIXME: We need to translate 0x05 READ_BLOCK_LIMITS to a MODE_SENSE
2829 as ATAPI tape drives don't get this right otherwise */
2833 static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
2835 if (!sata_pmp_attached(ap)) {
2836 if (likely(devno < ata_link_max_devices(&ap->link)))
2837 return &ap->link.device[devno];
2839 if (likely(devno < ap->nr_pmp_links))
2840 return &ap->pmp_link[devno].device[0];
2846 static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
2847 const struct scsi_device *scsidev)
2851 /* skip commands not addressed to targets we simulate */
2852 if (!sata_pmp_attached(ap)) {
2853 if (unlikely(scsidev->channel || scsidev->lun))
2855 devno = scsidev->id;
2857 if (unlikely(scsidev->id || scsidev->lun))
2859 devno = scsidev->channel;
2862 return ata_find_dev(ap, devno);
2866 * ata_scsi_find_dev - lookup ata_device from scsi_cmnd
2867 * @ap: ATA port to which the device is attached
2868 * @scsidev: SCSI device from which we derive the ATA device
2870 * Given various information provided in struct scsi_cmnd,
2871 * map that onto an ATA bus, and using that mapping
2872 * determine which ata_device is associated with the
2873 * SCSI command to be sent.
2876 * spin_lock_irqsave(host lock)
2879 * Associated ATA device, or %NULL if not found.
2881 static struct ata_device *
2882 ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
2884 struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
2886 if (unlikely(!dev || !ata_dev_enabled(dev)))
2893 * ata_scsi_map_proto - Map pass-thru protocol value to taskfile value.
2894 * @byte1: Byte 1 from pass-thru CDB.
2897 * ATA_PROT_UNKNOWN if mapping failed/unimplemented, protocol otherwise.
2900 ata_scsi_map_proto(u8 byte1)
2902 switch((byte1 & 0x1e) >> 1) {
2903 case 3: /* Non-data */
2904 return ATA_PROT_NODATA;
2907 case 10: /* UDMA Data-in */
2908 case 11: /* UDMA Data-Out */
2909 return ATA_PROT_DMA;
2911 case 4: /* PIO Data-in */
2912 case 5: /* PIO Data-out */
2913 return ATA_PROT_PIO;
2915 case 12: /* FPDMA */
2916 return ATA_PROT_NCQ;
2918 case 0: /* Hard Reset */
2920 case 8: /* Device Diagnostic */
2921 case 9: /* Device Reset */
2922 case 7: /* DMA Queued */
2923 case 15: /* Return Response Info */
2924 default: /* Reserved */
2928 return ATA_PROT_UNKNOWN;
2932 * ata_scsi_pass_thru - convert ATA pass-thru CDB to taskfile
2933 * @qc: command structure to be initialized
2935 * Handles either 12 or 16-byte versions of the CDB.
2938 * Zero on success, non-zero on failure.
2940 static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
2942 struct ata_taskfile *tf = &(qc->tf);
2943 struct scsi_cmnd *scmd = qc->scsicmd;
2944 struct ata_device *dev = qc->dev;
2945 const u8 *cdb = scmd->cmnd;
2947 if ((tf->protocol = ata_scsi_map_proto(cdb[1])) == ATA_PROT_UNKNOWN)
2951 tf->flags |= ATA_TFLAG_LBA;
2954 * 12 and 16 byte CDBs use different offsets to
2955 * provide the various register values.
2957 if (cdb[0] == ATA_16) {
2959 * 16-byte CDB - may contain extended commands.
2961 * If that is the case, copy the upper byte register values.
2963 if (cdb[1] & 0x01) {
2964 tf->hob_feature = cdb[3];
2965 tf->hob_nsect = cdb[5];
2966 tf->hob_lbal = cdb[7];
2967 tf->hob_lbam = cdb[9];
2968 tf->hob_lbah = cdb[11];
2969 tf->flags |= ATA_TFLAG_LBA48;
2971 tf->flags &= ~ATA_TFLAG_LBA48;
2974 * Always copy low byte, device and command registers.
2976 tf->feature = cdb[4];
2981 tf->device = cdb[13];
2982 tf->command = cdb[14];
2985 * 12-byte CDB - incapable of extended commands.
2987 tf->flags &= ~ATA_TFLAG_LBA48;
2989 tf->feature = cdb[3];
2994 tf->device = cdb[8];
2995 tf->command = cdb[9];
2998 /* For NCQ commands with FPDMA protocol, copy the tag value */
2999 if (tf->protocol == ATA_PROT_NCQ)
3000 tf->nsect = qc->tag << 3;
3002 /* enforce correct master/slave bit */
3003 tf->device = dev->devno ?
3004 tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;
3006 switch (tf->command) {
3007 /* READ/WRITE LONG use a non-standard sect_size */
3008 case ATA_CMD_READ_LONG:
3009 case ATA_CMD_READ_LONG_ONCE:
3010 case ATA_CMD_WRITE_LONG:
3011 case ATA_CMD_WRITE_LONG_ONCE:
3012 if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
3014 qc->sect_size = scsi_bufflen(scmd);
3017 /* commands using reported Logical Block size (e.g. 512 or 4K) */
3018 case ATA_CMD_CFA_WRITE_NE:
3019 case ATA_CMD_CFA_TRANS_SECT:
3020 case ATA_CMD_CFA_WRITE_MULT_NE:
3021 /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
3023 case ATA_CMD_READ_EXT:
3024 case ATA_CMD_READ_QUEUED:
3025 /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
3026 case ATA_CMD_FPDMA_READ:
3027 case ATA_CMD_READ_MULTI:
3028 case ATA_CMD_READ_MULTI_EXT:
3029 case ATA_CMD_PIO_READ:
3030 case ATA_CMD_PIO_READ_EXT:
3031 case ATA_CMD_READ_STREAM_DMA_EXT:
3032 case ATA_CMD_READ_STREAM_EXT:
3033 case ATA_CMD_VERIFY:
3034 case ATA_CMD_VERIFY_EXT:
3036 case ATA_CMD_WRITE_EXT:
3037 case ATA_CMD_WRITE_FUA_EXT:
3038 case ATA_CMD_WRITE_QUEUED:
3039 case ATA_CMD_WRITE_QUEUED_FUA_EXT:
3040 case ATA_CMD_FPDMA_WRITE:
3041 case ATA_CMD_WRITE_MULTI:
3042 case ATA_CMD_WRITE_MULTI_EXT:
3043 case ATA_CMD_WRITE_MULTI_FUA_EXT:
3044 case ATA_CMD_PIO_WRITE:
3045 case ATA_CMD_PIO_WRITE_EXT:
3046 case ATA_CMD_WRITE_STREAM_DMA_EXT:
3047 case ATA_CMD_WRITE_STREAM_EXT:
3048 qc->sect_size = scmd->device->sector_size;
3051 /* Everything else uses 512 byte "sectors" */
3053 qc->sect_size = ATA_SECT_SIZE;
3057 * Set flags so that all registers will be written, pass on
3058 * write indication (used for PIO/DMA setup), result TF is
3059 * copied back and we don't whine too much about its failure.
3061 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
3062 if (scmd->sc_data_direction == DMA_TO_DEVICE)
3063 tf->flags |= ATA_TFLAG_WRITE;
3065 qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
3068 * Set transfer length.
3070 * TODO: find out if we need to do more here to
3071 * cover scatter/gather case.
3073 ata_qc_set_pc_nbytes(qc);
3075 /* We may not issue DMA commands if no DMA mode is set */
3076 if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
3079 /* sanity check for pio multi commands */
3080 if ((cdb[1] & 0xe0) && !is_multi_taskfile(tf))
3083 if (is_multi_taskfile(tf)) {
3084 unsigned int multi_count = 1 << (cdb[1] >> 5);
3086 /* compare the passed through multi_count
3087 * with the cached multi_count of libata
3089 if (multi_count != dev->multi_count)
3090 ata_dev_warn(dev, "invalid multi_count %u ignored\n",
3095 * Filter SET_FEATURES - XFER MODE command -- otherwise,
3096 * SET_FEATURES - XFER MODE must be preceded/succeeded
3097 * by an update to hardware-specific registers for each
3098 * controller (i.e. the reason for ->set_piomode(),
3099 * ->set_dmamode(), and ->post_set_mode() hooks).
3101 if (tf->command == ATA_CMD_SET_FEATURES &&
3102 tf->feature == SETFEATURES_XFER)
3106 * Filter TPM commands by default. These provide an
3107 * essentially uncontrolled encrypted "back door" between
3108 * applications and the disk. Set libata.allow_tpm=1 if you
3109 * have a real reason for wanting to use them. This ensures
3110 * that installed software cannot easily mess stuff up without
3111 * user intent. DVR type users will probably ship with this enabled
3112 * for movie content management.
3114 * Note that for ATA8 we can issue a DCS change and DCS freeze lock
3115 * for this and should do in future but that it is not sufficient as
3116 * DCS is an optional feature set. Thus we also do the software filter
3117 * so that we comply with the TC consortium stated goal that the user
3118 * can turn off TC features of their system.
3120 if (tf->command >= 0x5C && tf->command <= 0x5F && !libata_allow_tpm)
3126 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3127 /* "Invalid field in cdb" */
3131 static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
3133 struct ata_taskfile *tf = &qc->tf;
3134 struct scsi_cmnd *scmd = qc->scsicmd;
3135 struct ata_device *dev = qc->dev;
3136 const u8 *cdb = scmd->cmnd;
3142 /* we may not issue DMA commands if no DMA mode is set */
3143 if (unlikely(!dev->dma_mode))
3146 if (unlikely(scmd->cmd_len < 16))
3148 scsi_16_lba_len(cdb, &block, &n_block);
3150 /* for now we only support WRITE SAME with the unmap bit set */
3151 if (unlikely(!(cdb[1] & 0x8)))
3155 * WRITE SAME always has a sector sized buffer as payload, this
3156 * should never be a multiple entry S/G list.
3158 if (!scsi_sg_count(scmd))
3161 buf = page_address(sg_page(scsi_sglist(scmd)));
3162 size = ata_set_lba_range_entries(buf, 512, block, n_block);
3164 if (ata_ncq_enabled(dev) && ata_fpdma_dsm_supported(dev)) {
3165 /* Newer devices support queued TRIM commands */
3166 tf->protocol = ATA_PROT_NCQ;
3167 tf->command = ATA_CMD_FPDMA_SEND;
3168 tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f;
3169 tf->nsect = qc->tag << 3;
3170 tf->hob_feature = (size / 512) >> 8;
3171 tf->feature = size / 512;
3175 tf->protocol = ATA_PROT_DMA;
3176 tf->hob_feature = 0;
3177 tf->feature = ATA_DSM_TRIM;
3178 tf->hob_nsect = (size / 512) >> 8;
3179 tf->nsect = size / 512;
3180 tf->command = ATA_CMD_DSM;
3183 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 |
3186 ata_qc_set_pc_nbytes(qc);
3191 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x00);
3192 /* "Invalid field in cdb" */
3197 * ata_mselect_caching - Simulate MODE SELECT for caching info page
3198 * @qc: Storage for translated ATA taskfile
3199 * @buf: input buffer
3200 * @len: number of valid bytes in the input buffer
3202 * Prepare a taskfile to modify caching information for the device.
3207 static int ata_mselect_caching(struct ata_queued_cmd *qc,
3208 const u8 *buf, int len)
3210 struct ata_taskfile *tf = &qc->tf;
3211 struct ata_device *dev = qc->dev;
3212 char mpage[CACHE_MPAGE_LEN];
3216 * The first two bytes of def_cache_mpage are a header, so offsets
3217 * in mpage are off by 2 compared to buf. Same for len.
3220 if (len != CACHE_MPAGE_LEN - 2)
3223 wce = buf[0] & (1 << 2);
3226 * Check that read-only bits are not modified.
3228 ata_msense_caching(dev->id, mpage, false);
3229 mpage[2] &= ~(1 << 2);
3231 if (memcmp(mpage + 2, buf, CACHE_MPAGE_LEN - 2) != 0)
3234 tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
3235 tf->protocol = ATA_PROT_NODATA;
3237 tf->command = ATA_CMD_SET_FEATURES;
3238 tf->feature = wce ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF;
3243 * ata_scsiop_mode_select - Simulate MODE SELECT 6, 10 commands
3244 * @qc: Storage for translated ATA taskfile
3246 * Converts a MODE SELECT command to an ATA SET FEATURES taskfile.
3247 * Assume this is invoked for direct access devices (e.g. disks) only.
3248 * There should be no block descriptor for other device types.
3251 * spin_lock_irqsave(host lock)
3253 static unsigned int ata_scsi_mode_select_xlat(struct ata_queued_cmd *qc)
3255 struct scsi_cmnd *scmd = qc->scsicmd;
3256 const u8 *cdb = scmd->cmnd;
3259 unsigned six_byte, pg_len, hdr_len, bd_len;
3264 six_byte = (cdb[0] == MODE_SELECT);
3266 if (scmd->cmd_len < 5)
3272 if (scmd->cmd_len < 9)
3275 len = (cdb[7] << 8) + cdb[8];
3279 /* We only support PF=1, SP=0. */
3280 if ((cdb[1] & 0x11) != 0x10)
3283 /* Test early for possible overrun. */
3284 if (!scsi_sg_count(scmd) || scsi_sglist(scmd)->length < len)
3285 goto invalid_param_len;
3287 p = page_address(sg_page(scsi_sglist(scmd)));
3289 /* Move past header and block descriptors. */
3291 goto invalid_param_len;
3296 bd_len = (p[6] << 8) + p[7];
3301 goto invalid_param_len;
3302 if (bd_len != 0 && bd_len != 8)
3310 /* Parse both possible formats for the mode page headers. */
3314 goto invalid_param_len;
3317 pg_len = (p[2] << 8) | p[3];
3322 goto invalid_param_len;
3331 * No mode subpages supported (yet) but asking for _all_
3332 * subpages may be valid
3334 if (spg && (spg != ALL_SUB_MPAGES))
3337 goto invalid_param_len;
3341 if (ata_mselect_caching(qc, p, pg_len) < 0)
3345 default: /* invalid page code */
3350 * Only one page has changeable data, so we only support setting one
3359 /* "Invalid field in CDB" */
3360 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
3364 /* "Invalid field in parameter list" */
3365 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x26, 0x0);
3369 /* "Parameter list length error" */
3370 ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
3374 scmd->result = SAM_STAT_GOOD;
3379 * ata_get_xlat_func - check if SCSI to ATA translation is possible
3381 * @cmd: SCSI command opcode to consider
3383 * Look up the SCSI command given, and determine whether the
3384 * SCSI command is to be translated or simulated.
3387 * Pointer to translation function if possible, %NULL if not.
3390 static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
3400 return ata_scsi_rw_xlat;
3403 return ata_scsi_write_same_xlat;
3405 case SYNCHRONIZE_CACHE:
3406 if (ata_try_flush_cache(dev))
3407 return ata_scsi_flush_xlat;
3412 return ata_scsi_verify_xlat;
3416 return ata_scsi_pass_thru;
3419 case MODE_SELECT_10:
3420 return ata_scsi_mode_select_xlat;
3424 return ata_scsi_start_stop_xlat;
3431 * ata_scsi_dump_cdb - dump SCSI command contents to dmesg
3432 * @ap: ATA port to which the command was being sent
3433 * @cmd: SCSI command to dump
3435 * Prints the contents of a SCSI command via printk().
3438 static inline void ata_scsi_dump_cdb(struct ata_port *ap,
3439 struct scsi_cmnd *cmd)
3442 struct scsi_device *scsidev = cmd->device;
3443 u8 *scsicmd = cmd->cmnd;
3445 DPRINTK("CDB (%u:%d,%d,%d) %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
3447 scsidev->channel, scsidev->id, scsidev->lun,
3448 scsicmd[0], scsicmd[1], scsicmd[2], scsicmd[3],
3449 scsicmd[4], scsicmd[5], scsicmd[6], scsicmd[7],
3454 static inline int __ata_scsi_queuecmd(struct scsi_cmnd *scmd,
3455 struct ata_device *dev)
3457 u8 scsi_op = scmd->cmnd[0];
3458 ata_xlat_func_t xlat_func;
3461 if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
3462 if (unlikely(!scmd->cmd_len || scmd->cmd_len > dev->cdb_len))
3465 xlat_func = ata_get_xlat_func(dev, scsi_op);
3467 if (unlikely(!scmd->cmd_len))
3471 if (likely((scsi_op != ATA_16) || !atapi_passthru16)) {
3472 /* relay SCSI command to ATAPI device */
3473 int len = COMMAND_SIZE(scsi_op);
3474 if (unlikely(len > scmd->cmd_len || len > dev->cdb_len))
3477 xlat_func = atapi_xlat;
3479 /* ATA_16 passthru, treat as an ATA command */
3480 if (unlikely(scmd->cmd_len > 16))
3483 xlat_func = ata_get_xlat_func(dev, scsi_op);
3488 rc = ata_scsi_translate(dev, scmd, xlat_func);
3490 ata_scsi_simulate(dev, scmd);
3495 DPRINTK("bad CDB len=%u, scsi_op=0x%02x, max=%u\n",
3496 scmd->cmd_len, scsi_op, dev->cdb_len);
3497 scmd->result = DID_ERROR << 16;
3498 scmd->scsi_done(scmd);
3503 * ata_scsi_queuecmd - Issue SCSI cdb to libata-managed device
3504 * @shost: SCSI host of command to be sent
3505 * @cmd: SCSI command to be sent
3507 * In some cases, this function translates SCSI commands into
3508 * ATA taskfiles, and queues the taskfiles to be sent to
3509 * hardware. In other cases, this function simulates a
3510 * SCSI device by evaluating and responding to certain
3511 * SCSI commands. This creates the overall effect of
3512 * ATA and ATAPI devices appearing as SCSI devices.
3518 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
3521 int ata_scsi_queuecmd(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
3523 struct ata_port *ap;
3524 struct ata_device *dev;
3525 struct scsi_device *scsidev = cmd->device;
3527 unsigned long irq_flags;
3529 ap = ata_shost_to_port(shost);
3531 spin_lock_irqsave(ap->lock, irq_flags);
3533 ata_scsi_dump_cdb(ap, cmd);
3535 dev = ata_scsi_find_dev(ap, scsidev);
3537 rc = __ata_scsi_queuecmd(cmd, dev);
3539 cmd->result = (DID_BAD_TARGET << 16);
3540 cmd->scsi_done(cmd);
3543 spin_unlock_irqrestore(ap->lock, irq_flags);
3549 * ata_scsi_simulate - simulate SCSI command on ATA device
3550 * @dev: the target device
3551 * @cmd: SCSI command being sent to device.
3553 * Interprets and directly executes a select list of SCSI commands
3554 * that can be handled internally.
3557 * spin_lock_irqsave(host lock)
3560 void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
3562 struct ata_scsi_args args;
3563 const u8 *scsicmd = cmd->cmnd;
3569 args.done = cmd->scsi_done;
3571 switch(scsicmd[0]) {
3572 /* TODO: worth improving? */
3574 ata_scsi_invalid_field(cmd);
3578 if (scsicmd[1] & 2) /* is CmdDt set? */
3579 ata_scsi_invalid_field(cmd);
3580 else if ((scsicmd[1] & 1) == 0) /* is EVPD clear? */
3581 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_std);
3582 else switch (scsicmd[2]) {
3584 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_00);
3587 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_80);
3590 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_83);
3593 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_89);
3596 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b0);
3599 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
3602 ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
3605 ata_scsi_invalid_field(cmd);
3612 ata_scsi_rbuf_fill(&args, ata_scsiop_mode_sense);
3616 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3619 case SERVICE_ACTION_IN_16:
3620 if ((scsicmd[1] & 0x1f) == SAI_READ_CAPACITY_16)
3621 ata_scsi_rbuf_fill(&args, ata_scsiop_read_cap);
3623 ata_scsi_invalid_field(cmd);
3627 ata_scsi_rbuf_fill(&args, ata_scsiop_report_luns);
3631 ata_scsi_set_sense(cmd, 0, 0, 0);
3632 cmd->result = (DRIVER_SENSE << 24);
3633 cmd->scsi_done(cmd);
3636 /* if we reach this, then writeback caching is disabled,
3637 * turning this into a no-op.
3639 case SYNCHRONIZE_CACHE:
3642 /* no-op's, complete with success */
3646 case TEST_UNIT_READY:
3647 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3650 case SEND_DIAGNOSTIC:
3651 tmp8 = scsicmd[1] & ~(1 << 3);
3652 if ((tmp8 == 0x4) && (!scsicmd[3]) && (!scsicmd[4]))
3653 ata_scsi_rbuf_fill(&args, ata_scsiop_noop);
3655 ata_scsi_invalid_field(cmd);
3658 /* all other commands */
3660 ata_scsi_set_sense(cmd, ILLEGAL_REQUEST, 0x20, 0x0);
3661 /* "Invalid command operation code" */
3662 cmd->scsi_done(cmd);
3667 int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
3671 for (i = 0; i < host->n_ports; i++) {
3672 struct ata_port *ap = host->ports[i];
3673 struct Scsi_Host *shost;
3676 shost = scsi_host_alloc(sht, sizeof(struct ata_port *));
3680 shost->eh_noresume = 1;
3681 *(struct ata_port **)&shost->hostdata[0] = ap;
3682 ap->scsi_host = shost;
3684 shost->transportt = ata_scsi_transport_template;
3685 shost->unique_id = ap->print_id;
3688 shost->max_channel = 1;
3689 shost->max_cmd_len = 16;
3690 shost->no_write_same = 1;
3692 /* Schedule policy is determined by ->qc_defer()
3693 * callback and it needs to see every deferred qc.
3694 * Set host_blocked to 1 to prevent SCSI midlayer from
3695 * automatically deferring requests.
3697 shost->max_host_blocked = 1;
3699 rc = scsi_add_host_with_dma(ap->scsi_host,
3700 &ap->tdev, ap->host->dev);
3708 scsi_host_put(host->ports[i]->scsi_host);
3711 struct Scsi_Host *shost = host->ports[i]->scsi_host;
3713 scsi_remove_host(shost);
3714 scsi_host_put(shost);
3719 void ata_scsi_scan_host(struct ata_port *ap, int sync)
3722 struct ata_device *last_failed_dev = NULL;
3723 struct ata_link *link;
3724 struct ata_device *dev;
3727 ata_for_each_link(link, ap, EDGE) {
3728 ata_for_each_dev(dev, link, ENABLED) {
3729 struct scsi_device *sdev;
3730 int channel = 0, id = 0;
3735 if (ata_is_host_link(link))
3738 channel = link->pmp;
3740 sdev = __scsi_add_device(ap->scsi_host, channel, id, 0,
3742 if (!IS_ERR(sdev)) {
3744 scsi_device_put(sdev);
3751 /* If we scanned while EH was in progress or allocation
3752 * failure occurred, scan would have failed silently. Check
3753 * whether all devices are attached.
3755 ata_for_each_link(link, ap, EDGE) {
3756 ata_for_each_dev(dev, link, ENABLED) {
3765 /* we're missing some SCSI devices */
3767 /* If caller requested synchrnous scan && we've made
3768 * any progress, sleep briefly and repeat.
3770 if (dev != last_failed_dev) {
3772 last_failed_dev = dev;
3776 /* We might be failing to detect boot device, give it
3777 * a few more chances.
3785 "WARNING: synchronous SCSI scan failed without making any progress, switching to async\n");
3788 queue_delayed_work(system_long_wq, &ap->hotplug_task,
3789 round_jiffies_relative(HZ));
3793 * ata_scsi_offline_dev - offline attached SCSI device
3794 * @dev: ATA device to offline attached SCSI device for
3796 * This function is called from ata_eh_hotplug() and responsible
3797 * for taking the SCSI device attached to @dev offline. This
3798 * function is called with host lock which protects dev->sdev
3802 * spin_lock_irqsave(host lock)
3805 * 1 if attached SCSI device exists, 0 otherwise.
3807 int ata_scsi_offline_dev(struct ata_device *dev)
3810 scsi_device_set_state(dev->sdev, SDEV_OFFLINE);
3817 * ata_scsi_remove_dev - remove attached SCSI device
3818 * @dev: ATA device to remove attached SCSI device for
3820 * This function is called from ata_eh_scsi_hotplug() and
3821 * responsible for removing the SCSI device attached to @dev.
3824 * Kernel thread context (may sleep).
3826 static void ata_scsi_remove_dev(struct ata_device *dev)
3828 struct ata_port *ap = dev->link->ap;
3829 struct scsi_device *sdev;
3830 unsigned long flags;
3832 /* Alas, we need to grab scan_mutex to ensure SCSI device
3833 * state doesn't change underneath us and thus
3834 * scsi_device_get() always succeeds. The mutex locking can
3835 * be removed if there is __scsi_device_get() interface which
3836 * increments reference counts regardless of device state.
3838 mutex_lock(&ap->scsi_host->scan_mutex);
3839 spin_lock_irqsave(ap->lock, flags);
3841 /* clearing dev->sdev is protected by host lock */
3846 /* If user initiated unplug races with us, sdev can go
3847 * away underneath us after the host lock and
3848 * scan_mutex are released. Hold onto it.
3850 if (scsi_device_get(sdev) == 0) {
3851 /* The following ensures the attached sdev is
3852 * offline on return from ata_scsi_offline_dev()
3853 * regardless it wins or loses the race
3854 * against this function.
3856 scsi_device_set_state(sdev, SDEV_OFFLINE);
3863 spin_unlock_irqrestore(ap->lock, flags);
3864 mutex_unlock(&ap->scsi_host->scan_mutex);
3867 ata_dev_info(dev, "detaching (SCSI %s)\n",
3868 dev_name(&sdev->sdev_gendev));
3870 scsi_remove_device(sdev);
3871 scsi_device_put(sdev);
3875 static void ata_scsi_handle_link_detach(struct ata_link *link)
3877 struct ata_port *ap = link->ap;
3878 struct ata_device *dev;
3880 ata_for_each_dev(dev, link, ALL) {
3881 unsigned long flags;
3883 if (!(dev->flags & ATA_DFLAG_DETACHED))
3886 spin_lock_irqsave(ap->lock, flags);
3887 dev->flags &= ~ATA_DFLAG_DETACHED;
3888 spin_unlock_irqrestore(ap->lock, flags);
3890 if (zpodd_dev_enabled(dev))
3893 ata_scsi_remove_dev(dev);
3898 * ata_scsi_media_change_notify - send media change event
3899 * @dev: Pointer to the disk device with media change event
3901 * Tell the block layer to send a media change notification
3905 * spin_lock_irqsave(host lock)
3907 void ata_scsi_media_change_notify(struct ata_device *dev)
3910 sdev_evt_send_simple(dev->sdev, SDEV_EVT_MEDIA_CHANGE,
3915 * ata_scsi_hotplug - SCSI part of hotplug
3916 * @work: Pointer to ATA port to perform SCSI hotplug on
3918 * Perform SCSI part of hotplug. It's executed from a separate
3919 * workqueue after EH completes. This is necessary because SCSI
3920 * hot plugging requires working EH and hot unplugging is
3921 * synchronized with hot plugging with a mutex.
3924 * Kernel thread context (may sleep).
3926 void ata_scsi_hotplug(struct work_struct *work)
3928 struct ata_port *ap =
3929 container_of(work, struct ata_port, hotplug_task.work);
3932 if (ap->pflags & ATA_PFLAG_UNLOADING) {
3933 DPRINTK("ENTER/EXIT - unloading\n");
3940 * The block layer suspend/resume path is fundamentally broken due
3941 * to freezable kthreads and workqueue and may deadlock if a block
3942 * device gets removed while resume is in progress. I don't know
3943 * what the solution is short of removing freezable kthreads and
3944 * workqueues altogether.
3946 * The following is an ugly hack to avoid kicking off device
3947 * removal while freezer is active. This is a joke but does avoid
3948 * this particular deadlock scenario.
3950 * https://bugzilla.kernel.org/show_bug.cgi?id=62801
3951 * http://marc.info/?l=linux-kernel&m=138695698516487
3953 #ifdef CONFIG_FREEZER
3959 mutex_lock(&ap->scsi_scan_mutex);
3961 /* Unplug detached devices. We cannot use link iterator here
3962 * because PMP links have to be scanned even if PMP is
3963 * currently not attached. Iterate manually.
3965 ata_scsi_handle_link_detach(&ap->link);
3967 for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
3968 ata_scsi_handle_link_detach(&ap->pmp_link[i]);
3970 /* scan for new ones */
3971 ata_scsi_scan_host(ap, 0);
3973 mutex_unlock(&ap->scsi_scan_mutex);
3978 * ata_scsi_user_scan - indication for user-initiated bus scan
3979 * @shost: SCSI host to scan
3980 * @channel: Channel to scan
3984 * This function is called when user explicitly requests bus
3985 * scan. Set probe pending flag and invoke EH.
3988 * SCSI layer (we don't care)
3993 int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
3994 unsigned int id, u64 lun)
3996 struct ata_port *ap = ata_shost_to_port(shost);
3997 unsigned long flags;
4000 if (!ap->ops->error_handler)
4003 if (lun != SCAN_WILD_CARD && lun)
4006 if (!sata_pmp_attached(ap)) {
4007 if (channel != SCAN_WILD_CARD && channel)
4011 if (id != SCAN_WILD_CARD && id)
4016 spin_lock_irqsave(ap->lock, flags);
4018 if (devno == SCAN_WILD_CARD) {
4019 struct ata_link *link;
4021 ata_for_each_link(link, ap, EDGE) {
4022 struct ata_eh_info *ehi = &link->eh_info;
4023 ehi->probe_mask |= ATA_ALL_DEVICES;
4024 ehi->action |= ATA_EH_RESET;
4027 struct ata_device *dev = ata_find_dev(ap, devno);
4030 struct ata_eh_info *ehi = &dev->link->eh_info;
4031 ehi->probe_mask |= 1 << dev->devno;
4032 ehi->action |= ATA_EH_RESET;
4038 ata_port_schedule_eh(ap);
4039 spin_unlock_irqrestore(ap->lock, flags);
4040 ata_port_wait_eh(ap);
4042 spin_unlock_irqrestore(ap->lock, flags);
4048 * ata_scsi_dev_rescan - initiate scsi_rescan_device()
4049 * @work: Pointer to ATA port to perform scsi_rescan_device()
4051 * After ATA pass thru (SAT) commands are executed successfully,
4052 * libata need to propagate the changes to SCSI layer.
4055 * Kernel thread context (may sleep).
4057 void ata_scsi_dev_rescan(struct work_struct *work)
4059 struct ata_port *ap =
4060 container_of(work, struct ata_port, scsi_rescan_task);
4061 struct ata_link *link;
4062 struct ata_device *dev;
4063 unsigned long flags;
4065 mutex_lock(&ap->scsi_scan_mutex);
4066 spin_lock_irqsave(ap->lock, flags);
4068 ata_for_each_link(link, ap, EDGE) {
4069 ata_for_each_dev(dev, link, ENABLED) {
4070 struct scsi_device *sdev = dev->sdev;
4074 if (scsi_device_get(sdev))
4077 spin_unlock_irqrestore(ap->lock, flags);
4078 scsi_rescan_device(&(sdev->sdev_gendev));
4079 scsi_device_put(sdev);
4080 spin_lock_irqsave(ap->lock, flags);
4084 spin_unlock_irqrestore(ap->lock, flags);
4085 mutex_unlock(&ap->scsi_scan_mutex);
4089 * ata_sas_port_alloc - Allocate port for a SAS attached SATA device
4090 * @host: ATA host container for all SAS ports
4091 * @port_info: Information from low-level host driver
4092 * @shost: SCSI host that the scsi device is attached to
4095 * PCI/etc. bus probe sem.
4098 * ata_port pointer on success / NULL on failure.
4101 struct ata_port *ata_sas_port_alloc(struct ata_host *host,
4102 struct ata_port_info *port_info,
4103 struct Scsi_Host *shost)
4105 struct ata_port *ap;
4107 ap = ata_port_alloc(host);
4112 ap->lock = &host->lock;
4113 ap->pio_mask = port_info->pio_mask;
4114 ap->mwdma_mask = port_info->mwdma_mask;
4115 ap->udma_mask = port_info->udma_mask;
4116 ap->flags |= port_info->flags;
4117 ap->ops = port_info->port_ops;
4118 ap->cbl = ATA_CBL_SATA;
4122 EXPORT_SYMBOL_GPL(ata_sas_port_alloc);
4125 * ata_sas_port_start - Set port up for dma.
4126 * @ap: Port to initialize
4128 * Called just after data structures for each port are
4131 * May be used as the port_start() entry in ata_port_operations.
4134 * Inherited from caller.
4136 int ata_sas_port_start(struct ata_port *ap)
4139 * the port is marked as frozen at allocation time, but if we don't
4140 * have new eh, we won't thaw it
4142 if (!ap->ops->error_handler)
4143 ap->pflags &= ~ATA_PFLAG_FROZEN;
4146 EXPORT_SYMBOL_GPL(ata_sas_port_start);
4149 * ata_port_stop - Undo ata_sas_port_start()
4150 * @ap: Port to shut down
4152 * May be used as the port_stop() entry in ata_port_operations.
4155 * Inherited from caller.
4158 void ata_sas_port_stop(struct ata_port *ap)
4161 EXPORT_SYMBOL_GPL(ata_sas_port_stop);
4164 * ata_sas_async_probe - simply schedule probing and return
4165 * @ap: Port to probe
4167 * For batch scheduling of probe for sas attached ata devices, assumes
4168 * the port has already been through ata_sas_port_init()
4170 void ata_sas_async_probe(struct ata_port *ap)
4172 __ata_port_probe(ap);
4174 EXPORT_SYMBOL_GPL(ata_sas_async_probe);
4176 int ata_sas_sync_probe(struct ata_port *ap)
4178 return ata_port_probe(ap);
4180 EXPORT_SYMBOL_GPL(ata_sas_sync_probe);
4184 * ata_sas_port_init - Initialize a SATA device
4185 * @ap: SATA port to initialize
4188 * PCI/etc. bus probe sem.
4191 * Zero on success, non-zero on error.
4194 int ata_sas_port_init(struct ata_port *ap)
4196 int rc = ap->ops->port_start(ap);
4200 ap->print_id = atomic_inc_return(&ata_print_id);
4203 EXPORT_SYMBOL_GPL(ata_sas_port_init);
4206 * ata_sas_port_destroy - Destroy a SATA port allocated by ata_sas_port_alloc
4207 * @ap: SATA port to destroy
4211 void ata_sas_port_destroy(struct ata_port *ap)
4213 if (ap->ops->port_stop)
4214 ap->ops->port_stop(ap);
4217 EXPORT_SYMBOL_GPL(ata_sas_port_destroy);
4220 * ata_sas_slave_configure - Default slave_config routine for libata devices
4221 * @sdev: SCSI device to configure
4222 * @ap: ATA port to which SCSI device is attached
4228 int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap)
4230 ata_scsi_sdev_config(sdev);
4231 ata_scsi_dev_config(sdev, ap->link.device);
4234 EXPORT_SYMBOL_GPL(ata_sas_slave_configure);
4237 * ata_sas_queuecmd - Issue SCSI cdb to libata-managed device
4238 * @cmd: SCSI command to be sent
4239 * @ap: ATA port to which the command is being sent
4242 * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
4246 int ata_sas_queuecmd(struct scsi_cmnd *cmd, struct ata_port *ap)
4250 ata_scsi_dump_cdb(ap, cmd);
4252 if (likely(ata_dev_enabled(ap->link.device)))
4253 rc = __ata_scsi_queuecmd(cmd, ap->link.device);
4255 cmd->result = (DID_BAD_TARGET << 16);
4256 cmd->scsi_done(cmd);
4260 EXPORT_SYMBOL_GPL(ata_sas_queuecmd);
4262 int ata_sas_allocate_tag(struct ata_port *ap)
4264 unsigned int max_queue = ap->host->n_tags;
4265 unsigned int i, tag;
4267 for (i = 0, tag = ap->sas_last_tag + 1; i < max_queue; i++, tag++) {
4268 tag = tag < max_queue ? tag : 0;
4270 /* the last tag is reserved for internal command. */
4271 if (tag == ATA_TAG_INTERNAL)
4274 if (!test_and_set_bit(tag, &ap->sas_tag_allocated)) {
4275 ap->sas_last_tag = tag;
4282 void ata_sas_free_tag(unsigned int tag, struct ata_port *ap)
4284 clear_bit(tag, &ap->sas_tag_allocated);