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scsi: blk-mq: Add callbacks for storing & retrieving budget token

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Since SCSI is the only driver which requires dispatch budget move the token
from struct request to struct scsi_cmnd.

Link: https://lore.kernel.org/r/20210122023317.687987-8-ming.lei@redhat.com
Cc: Omar Sandoval <osandov@fb.com>
Cc: Kashyap Desai <kashyap.desai@broadcom.com>
Cc: Sumanesh Samanta <sumanesh.samanta@broadcom.com>
Cc: Ewan D. Milne <emilne@redhat.com>
Cc: Hannes Reinecke <hare@suse.de>
Tested-by: Sumanesh Samanta <sumanesh.samanta@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Ming Lei
2021-01-22 10:33:11 +08:00
committed by Martin K. Petersen
parent 2d13b1ea9f
commit d022d18c04
3 changed files with 29 additions and 0 deletions
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9
include/linux/blk-mq.h
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@@ -313,6 +313,15 @@ struct blk_mq_ops {
*/
void (*put_budget)(struct request_queue *);
/*
* @set_rq_budget_toekn: store rq's budget token
*/
void (*set_rq_budget_token)(struct request *, int);
/*
* @get_rq_budget_toekn: retrieve rq's budget token
*/
int (*get_rq_budget_token)(struct request *);
/**
* @timeout: Called on request timeout.
*/