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blk-mq: abstract out queue map

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This is in preparation for allowing multiple sets of maps per
queue, if so desired.

Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe
2018-10-29 13:06:14 -06:00
parent a8908939af
commit ed76e329d7
15 changed files with 64 additions and 50 deletions
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15
include/linux/blk-mq.h
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@@ -74,10 +74,19 @@ struct blk_mq_hw_ctx {
struct srcu_struct srcu[0];
};
struct blk_mq_queue_map {
unsigned int *mq_map;
unsigned int nr_queues;
};
enum {
HCTX_MAX_TYPES = 1,
};
struct blk_mq_tag_set {
unsigned int *mq_map;
struct blk_mq_queue_map map[HCTX_MAX_TYPES];
const struct blk_mq_ops *ops;
unsigned int nr_hw_queues;
unsigned int nr_hw_queues; /* nr hw queues across maps */
unsigned int queue_depth; /* max hw supported */
unsigned int reserved_tags;
unsigned int cmd_size; /* per-request extra data */
@@ -295,7 +304,7 @@ void blk_mq_freeze_queue_wait(struct request_queue *q);
int blk_mq_freeze_queue_wait_timeout(struct request_queue *q,
unsigned long timeout);
int blk_mq_map_queues(struct blk_mq_tag_set *set);
int blk_mq_map_queues(struct blk_mq_queue_map *qmap);
void blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set, int nr_hw_queues);
void blk_mq_quiesce_queue_nowait(struct request_queue *q);