From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- include/scsi/scsi_tcq.h | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 include/scsi/scsi_tcq.h (limited to 'include/scsi/scsi_tcq.h') diff --git a/include/scsi/scsi_tcq.h b/include/scsi/scsi_tcq.h new file mode 100644 index 000000000..ea7848e74 --- /dev/null +++ b/include/scsi/scsi_tcq.h @@ -0,0 +1,43 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _SCSI_SCSI_TCQ_H +#define _SCSI_SCSI_TCQ_H + +#include +#include +#include +#include + +#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 */ -- cgit v1.2.3