diff options
Diffstat (limited to 'include/linux/blk-mq.h')
-rw-r--r-- | include/linux/blk-mq.h | 101 |
1 files changed, 61 insertions, 40 deletions
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 0120451545d8..0feedebfde48 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -8,7 +8,13 @@ struct blk_mq_tags; struct blk_mq_cpu_notifier { struct list_head list; void *data; - void (*notify)(void *data, unsigned long action, unsigned int cpu); + int (*notify)(void *data, unsigned long action, unsigned int cpu); +}; + +struct blk_mq_ctxmap { + unsigned int map_size; + unsigned int bits_per_word; + struct blk_align_bitmap *map; }; struct blk_mq_hw_ctx { @@ -18,7 +24,11 @@ struct blk_mq_hw_ctx { } ____cacheline_aligned_in_smp; unsigned long state; /* BLK_MQ_S_* flags */ - struct delayed_work delayed_work; + struct delayed_work run_work; + struct delayed_work delay_work; + cpumask_var_t cpumask; + int next_cpu; + int next_cpu_batch; unsigned long flags; /* BLK_MQ_F_* flags */ @@ -27,13 +37,13 @@ struct blk_mq_hw_ctx { void *driver_data; + struct blk_mq_ctxmap ctx_map; + unsigned int nr_ctx; struct blk_mq_ctx **ctxs; - unsigned int nr_ctx_map; - unsigned long *ctx_map; - struct request **rqs; - struct list_head page_list; + unsigned int wait_index; + struct blk_mq_tags *tags; unsigned long queued; @@ -41,31 +51,40 @@ struct blk_mq_hw_ctx { #define BLK_MQ_MAX_DISPATCH_ORDER 10 unsigned long dispatched[BLK_MQ_MAX_DISPATCH_ORDER]; - unsigned int queue_depth; unsigned int numa_node; unsigned int cmd_size; /* per-request extra data */ + atomic_t nr_active; + struct blk_mq_cpu_notifier cpu_notifier; struct kobject kobj; }; -struct blk_mq_reg { +struct blk_mq_tag_set { struct blk_mq_ops *ops; unsigned int nr_hw_queues; - unsigned int queue_depth; + unsigned int queue_depth; /* max hw supported */ unsigned int reserved_tags; unsigned int cmd_size; /* per-request extra data */ int numa_node; unsigned int timeout; unsigned int flags; /* BLK_MQ_F_* */ + void *driver_data; + + struct blk_mq_tags **tags; + + struct mutex tag_list_lock; + struct list_head tag_list; }; typedef int (queue_rq_fn)(struct blk_mq_hw_ctx *, struct request *); typedef struct blk_mq_hw_ctx *(map_queue_fn)(struct request_queue *, const int); -typedef struct blk_mq_hw_ctx *(alloc_hctx_fn)(struct blk_mq_reg *,unsigned int); -typedef void (free_hctx_fn)(struct blk_mq_hw_ctx *, unsigned int); typedef int (init_hctx_fn)(struct blk_mq_hw_ctx *, void *, unsigned int); typedef void (exit_hctx_fn)(struct blk_mq_hw_ctx *, unsigned int); +typedef int (init_request_fn)(void *, struct request *, unsigned int, + unsigned int, unsigned int); +typedef void (exit_request_fn)(void *, struct request *, unsigned int, + unsigned int); struct blk_mq_ops { /* @@ -86,18 +105,20 @@ struct blk_mq_ops { softirq_done_fn *complete; /* - * Override for hctx allocations (should probably go) - */ - alloc_hctx_fn *alloc_hctx; - free_hctx_fn *free_hctx; - - /* * Called when the block layer side of a hardware queue has been * set up, allowing the driver to allocate/init matching structures. * Ditto for exit/teardown. */ init_hctx_fn *init_hctx; exit_hctx_fn *exit_hctx; + + /* + * Called for every command allocated by the block layer to allow + * the driver to set up driver specific data. + * Ditto for exit/teardown. + */ + init_request_fn *init_request; + exit_request_fn *exit_request; }; enum { @@ -107,18 +128,24 @@ enum { BLK_MQ_F_SHOULD_MERGE = 1 << 0, BLK_MQ_F_SHOULD_SORT = 1 << 1, - BLK_MQ_F_SHOULD_IPI = 1 << 2, + BLK_MQ_F_TAG_SHARED = 1 << 2, + BLK_MQ_F_SG_MERGE = 1 << 3, + BLK_MQ_F_SYSFS_UP = 1 << 4, BLK_MQ_S_STOPPED = 0, + BLK_MQ_S_TAG_ACTIVE = 1, BLK_MQ_MAX_DEPTH = 2048, + + BLK_MQ_CPU_WORK_BATCH = 8, }; -struct request_queue *blk_mq_init_queue(struct blk_mq_reg *, void *); +struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *); int blk_mq_register_disk(struct gendisk *); void blk_mq_unregister_disk(struct gendisk *); -int blk_mq_init_commands(struct request_queue *, int (*init)(void *data, struct blk_mq_hw_ctx *, struct request *, unsigned int), void *data); -void blk_mq_free_commands(struct request_queue *, void (*free)(void *data, struct blk_mq_hw_ctx *, struct request *, unsigned int), void *data); + +int blk_mq_alloc_tag_set(struct blk_mq_tag_set *set); +void blk_mq_free_tag_set(struct blk_mq_tag_set *set); void blk_mq_flush_plug_list(struct blk_plug *plug, bool from_schedule); @@ -126,28 +153,28 @@ void blk_mq_insert_request(struct request *, bool, bool, bool); void blk_mq_run_queues(struct request_queue *q, bool async); void blk_mq_free_request(struct request *rq); bool blk_mq_can_queue(struct blk_mq_hw_ctx *); -struct request *blk_mq_alloc_request(struct request_queue *q, int rw, gfp_t gfp); -struct request *blk_mq_alloc_reserved_request(struct request_queue *q, int rw, gfp_t gfp); -struct request *blk_mq_rq_from_tag(struct request_queue *q, unsigned int tag); +struct request *blk_mq_alloc_request(struct request_queue *q, int rw, + gfp_t gfp, bool reserved); +struct request *blk_mq_tag_to_rq(struct blk_mq_tags *tags, unsigned int tag); struct blk_mq_hw_ctx *blk_mq_map_queue(struct request_queue *, const int ctx_index); -struct blk_mq_hw_ctx *blk_mq_alloc_single_hw_queue(struct blk_mq_reg *, unsigned int); -void blk_mq_free_single_hw_queue(struct blk_mq_hw_ctx *, unsigned int); +struct blk_mq_hw_ctx *blk_mq_alloc_single_hw_queue(struct blk_mq_tag_set *, unsigned int, int); -bool blk_mq_end_io_partial(struct request *rq, int error, - unsigned int nr_bytes); -static inline void blk_mq_end_io(struct request *rq, int error) -{ - bool done = !blk_mq_end_io_partial(rq, error, blk_rq_bytes(rq)); - BUG_ON(!done); -} +void blk_mq_end_io(struct request *rq, int error); +void __blk_mq_end_io(struct request *rq, int error); +void blk_mq_requeue_request(struct request *rq); +void blk_mq_add_to_requeue_list(struct request *rq, bool at_head); +void blk_mq_kick_requeue_list(struct request_queue *q); void blk_mq_complete_request(struct request *rq); void blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx); void blk_mq_start_hw_queue(struct blk_mq_hw_ctx *hctx); void blk_mq_stop_hw_queues(struct request_queue *q); -void blk_mq_start_stopped_hw_queues(struct request_queue *q); +void blk_mq_start_hw_queues(struct request_queue *q); +void blk_mq_start_stopped_hw_queues(struct request_queue *q, bool async); +void blk_mq_delay_queue(struct blk_mq_hw_ctx *hctx, unsigned long msecs); +void blk_mq_tag_busy_iter(struct blk_mq_tags *tags, void (*fn)(void *data, unsigned long *), void *data); /* * Driver command data is immediately after the request. So subtract request @@ -162,12 +189,6 @@ static inline void *blk_mq_rq_to_pdu(struct request *rq) return (void *) rq + sizeof(*rq); } -static inline struct request *blk_mq_tag_to_rq(struct blk_mq_hw_ctx *hctx, - unsigned int tag) -{ - return hctx->rqs[tag]; -} - #define queue_for_each_hw_ctx(q, hctx, i) \ for ((i) = 0; (i) < (q)->nr_hw_queues && \ ({ hctx = (q)->queue_hw_ctx[i]; 1; }); (i)++) |