cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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scsi_tcq.h (993B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _SCSI_SCSI_TCQ_H
      3#define _SCSI_SCSI_TCQ_H
      4
      5#include <linux/blkdev.h>
      6#include <scsi/scsi_cmnd.h>
      7#include <scsi/scsi_device.h>
      8#include <scsi/scsi_host.h>
      9
     10#define SCSI_NO_TAG	(-1)    /* identify no tag in use */
     11
     12
     13#ifdef CONFIG_BLOCK
     14/**
     15 * scsi_host_find_tag - find the tagged command by host
     16 * @shost:	pointer to scsi_host
     17 * @tag:	tag
     18 *
     19 * Note: for devices using multiple hardware queues tag must have been
     20 * generated by blk_mq_unique_tag().
     21 **/
     22static inline struct scsi_cmnd *scsi_host_find_tag(struct Scsi_Host *shost,
     23		int tag)
     24{
     25	struct request *req = NULL;
     26	u16 hwq;
     27
     28	if (tag == SCSI_NO_TAG)
     29		return NULL;
     30
     31	hwq = blk_mq_unique_tag_to_hwq(tag);
     32	if (hwq < shost->tag_set.nr_hw_queues) {
     33		req = blk_mq_tag_to_rq(shost->tag_set.tags[hwq],
     34					blk_mq_unique_tag_to_tag(tag));
     35	}
     36
     37	if (!req || !blk_mq_request_started(req))
     38		return NULL;
     39	return blk_mq_rq_to_pdu(req);
     40}
     41
     42#endif /* CONFIG_BLOCK */
     43#endif /* _SCSI_SCSI_TCQ_H */