1 #ifndef BLK_MQ_SCHED_H 2 #define BLK_MQ_SCHED_H 3 4 #include "blk-mq.h" 5 #include "blk-mq-tag.h" 6 7 int blk_mq_sched_init_hctx_data(struct request_queue *q, size_t size, 8 int (*init)(struct blk_mq_hw_ctx *), 9 void (*exit)(struct blk_mq_hw_ctx *)); 10 11 void blk_mq_sched_free_hctx_data(struct request_queue *q, 12 void (*exit)(struct blk_mq_hw_ctx *)); 13 14 struct request *blk_mq_sched_get_request(struct request_queue *q, struct bio *bio, unsigned int op, struct blk_mq_alloc_data *data); 15 void blk_mq_sched_put_request(struct request *rq); 16 17 void blk_mq_sched_request_inserted(struct request *rq); 18 bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio, 19 struct request **merged_request); 20 bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio); 21 bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq); 22 void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx); 23 24 void blk_mq_sched_insert_request(struct request *rq, bool at_head, 25 bool run_queue, bool async, bool can_block); 26 void blk_mq_sched_insert_requests(struct request_queue *q, 27 struct blk_mq_ctx *ctx, 28 struct list_head *list, bool run_queue_async); 29 30 void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx); 31 void blk_mq_sched_move_to_dispatch(struct blk_mq_hw_ctx *hctx, 32 struct list_head *rq_list, 33 struct request *(*get_rq)(struct blk_mq_hw_ctx *)); 34 35 int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e); 36 void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e); 37 38 int blk_mq_sched_init_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx, 39 unsigned int hctx_idx); 40 void blk_mq_sched_exit_hctx(struct request_queue *q, struct blk_mq_hw_ctx *hctx, 41 unsigned int hctx_idx); 42 43 int blk_mq_sched_init(struct request_queue *q); 44 45 static inline bool 46 blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio) 47 { 48 struct elevator_queue *e = q->elevator; 49 50 if (!e || blk_queue_nomerges(q) || !bio_mergeable(bio)) 51 return false; 52 53 return __blk_mq_sched_bio_merge(q, bio); 54 } 55 56 static inline int blk_mq_sched_get_rq_priv(struct request_queue *q, 57 struct request *rq, 58 struct bio *bio) 59 { 60 struct elevator_queue *e = q->elevator; 61 62 if (e && e->type->ops.mq.get_rq_priv) 63 return e->type->ops.mq.get_rq_priv(q, rq, bio); 64 65 return 0; 66 } 67 68 static inline void blk_mq_sched_put_rq_priv(struct request_queue *q, 69 struct request *rq) 70 { 71 struct elevator_queue *e = q->elevator; 72 73 if (e && e->type->ops.mq.put_rq_priv) 74 e->type->ops.mq.put_rq_priv(q, rq); 75 } 76 77 static inline bool 78 blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq, 79 struct bio *bio) 80 { 81 struct elevator_queue *e = q->elevator; 82 83 if (e && e->type->ops.mq.allow_merge) 84 return e->type->ops.mq.allow_merge(q, rq, bio); 85 86 return true; 87 } 88 89 static inline void 90 blk_mq_sched_completed_request(struct blk_mq_hw_ctx *hctx, struct request *rq) 91 { 92 struct elevator_queue *e = hctx->queue->elevator; 93 94 if (e && e->type->ops.mq.completed_request) 95 e->type->ops.mq.completed_request(hctx, rq); 96 97 BUG_ON(rq->internal_tag == -1); 98 99 blk_mq_put_tag(hctx, hctx->sched_tags, rq->mq_ctx, rq->internal_tag); 100 } 101 102 static inline void blk_mq_sched_started_request(struct request *rq) 103 { 104 struct request_queue *q = rq->q; 105 struct elevator_queue *e = q->elevator; 106 107 if (e && e->type->ops.mq.started_request) 108 e->type->ops.mq.started_request(rq); 109 } 110 111 static inline void blk_mq_sched_requeue_request(struct request *rq) 112 { 113 struct request_queue *q = rq->q; 114 struct elevator_queue *e = q->elevator; 115 116 if (e && e->type->ops.mq.requeue_request) 117 e->type->ops.mq.requeue_request(rq); 118 } 119 120 static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx) 121 { 122 struct elevator_queue *e = hctx->queue->elevator; 123 124 if (e && e->type->ops.mq.has_work) 125 return e->type->ops.mq.has_work(hctx); 126 127 return false; 128 } 129 130 /* 131 * Mark a hardware queue as needing a restart. 132 */ 133 static inline void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx) 134 { 135 if (!test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state)) 136 set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state); 137 } 138 139 static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx) 140 { 141 return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state); 142 } 143 144 #endif 145