44 lines
993 B
C
44 lines
993 B
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
#ifndef _SCSI_SCSI_TCQ_H
|
||
|
|
#define _SCSI_SCSI_TCQ_H
|
||
|
|
|
||
|
|
#include <linux/blkdev.h>
|
||
|
|
#include <scsi/scsi_cmnd.h>
|
||
|
|
#include <scsi/scsi_device.h>
|
||
|
|
#include <scsi/scsi_host.h>
|
||
|
|
|
||
|
|
#define SCSI_NO_TAG (-1) /* identify no tag in use */
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef CONFIG_BLOCK
|
||
|
|
/**
|
||
|
|
* scsi_host_find_tag - find the tagged command by host
|
||
|
|
* @shost: pointer to scsi_host
|
||
|
|
* @tag: tag
|
||
|
|
*
|
||
|
|
* Note: for devices using multiple hardware queues tag must have been
|
||
|
|
* generated by blk_mq_unique_tag().
|
||
|
|
**/
|
||
|
|
static inline struct scsi_cmnd *scsi_host_find_tag(struct Scsi_Host *shost,
|
||
|
|
int tag)
|
||
|
|
{
|
||
|
|
struct request *req = NULL;
|
||
|
|
u16 hwq;
|
||
|
|
|
||
|
|
if (tag == SCSI_NO_TAG)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
hwq = blk_mq_unique_tag_to_hwq(tag);
|
||
|
|
if (hwq < shost->tag_set.nr_hw_queues) {
|
||
|
|
req = blk_mq_tag_to_rq(shost->tag_set.tags[hwq],
|
||
|
|
blk_mq_unique_tag_to_tag(tag));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!req || !blk_mq_request_started(req))
|
||
|
|
return NULL;
|
||
|
|
return blk_mq_rq_to_pdu(req);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* CONFIG_BLOCK */
|
||
|
|
#endif /* _SCSI_SCSI_TCQ_H */
|