mirror of
https://github.com/torvalds/linux.git
synced 2024-11-18 01:51:53 +00:00
f664a3cc17
This removes the legacy (non-mq) IO path for SCSI. Cc: linux-scsi@vger.kernel.org Acked-by: Himanshu Madhani <himanshu.madhani@cavium.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Tested-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Omar Sandoval <osandov@fb.com> Acked-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
44 lines
961 B
C
44 lines
961 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)
|
|
return NULL;
|
|
return blk_mq_rq_to_pdu(req);
|
|
}
|
|
|
|
#endif /* CONFIG_BLOCK */
|
|
#endif /* _SCSI_SCSI_TCQ_H */
|