diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/blk-mq.h | 10 | ||||
| -rw-r--r-- | include/linux/blkdev.h | 3 |
2 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 83cc9d4e5455..daf17d70aeca 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -59,6 +59,9 @@ struct blk_mq_hw_ctx { struct blk_mq_cpu_notifier cpu_notifier; struct kobject kobj; + + unsigned long poll_invoked; + unsigned long poll_success; }; struct blk_mq_tag_set { @@ -97,6 +100,8 @@ typedef void (exit_request_fn)(void *, struct request *, unsigned int, typedef void (busy_iter_fn)(struct blk_mq_hw_ctx *, struct request *, void *, bool); typedef void (busy_tag_iter_fn)(struct request *, void *, bool); +typedef int (poll_fn)(struct blk_mq_hw_ctx *, unsigned int); + struct blk_mq_ops { /* @@ -114,6 +119,11 @@ struct blk_mq_ops { */ timeout_fn *timeout; + /* + * Called to poll for completion of a specific tag. + */ + poll_fn *poll; + softirq_done_fn *complete; /* diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 5ee0f5243025..3fe27f8d91f0 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -487,6 +487,7 @@ struct request_queue { #define QUEUE_FLAG_DEAD 19 /* queue tear-down finished */ #define QUEUE_FLAG_INIT_DONE 20 /* queue is initialized */ #define QUEUE_FLAG_NO_SG_MERGE 21 /* don't attempt to merge SG segments*/ +#define QUEUE_FLAG_POLL 22 /* IO polling enabled if set */ #define QUEUE_FLAG_DEFAULT ((1 << QUEUE_FLAG_IO_STAT) | \ (1 << QUEUE_FLAG_STACKABLE) | \ @@ -814,6 +815,8 @@ extern int blk_execute_rq(struct request_queue *, struct gendisk *, extern void blk_execute_rq_nowait(struct request_queue *, struct gendisk *, struct request *, int, rq_end_io_fn *); +bool blk_poll(struct request_queue *q, blk_qc_t cookie); + static inline struct request_queue *bdev_get_queue(struct block_device *bdev) { return bdev->bd_disk->queue; /* this is never NULL */ |