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_queues(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_sched_setup(struct request_queue *q); 36 void blk_mq_sched_teardown(struct request_queue *q); 37 38 int blk_mq_sched_init(struct request_queue *q); 39 40 static inline bool 41 blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio) 42 { 43 struct elevator_queue *e = q->elevator; 44 45 if (!e || blk_queue_nomerges(q) || !bio_mergeable(bio)) 46 return false; 47 48 return __blk_mq_sched_bio_merge(q, bio); 49 } 50 51 static inline int blk_mq_sched_get_rq_priv(struct request_queue *q, 52 struct request *rq, 53 struct bio *bio) 54 { 55 struct elevator_queue *e = q->elevator; 56 57 if (e && e->type->ops.mq.get_rq_priv) 58 return e->type->ops.mq.get_rq_priv(q, rq, bio); 59 60 return 0; 61 } 62 63 static inline void blk_mq_sched_put_rq_priv(struct request_queue *q, 64 struct request *rq) 65 { 66 struct elevator_queue *e = q->elevator; 67 68 if (e && e->type->ops.mq.put_rq_priv) 69 e->type->ops.mq.put_rq_priv(q, rq); 70 } 71 72 static inline bool 73 blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq, 74 struct bio *bio) 75 { 76 struct elevator_queue *e = q->elevator; 77 78 if (e && e->type->ops.mq.allow_merge) 79 return e->type->ops.mq.allow_merge(q, rq, bio); 80 81 return true; 82 } 83 84 static inline void 85 blk_mq_sched_completed_request(struct blk_mq_hw_ctx *hctx, struct request *rq) 86 { 87 struct elevator_queue *e = hctx->queue->elevator; 88 89 if (e && e->type->ops.mq.completed_request) 90 e->type->ops.mq.completed_request(hctx, rq); 91 92 BUG_ON(rq->internal_tag == -1); 93 94 blk_mq_put_tag(hctx, hctx->sched_tags, rq->mq_ctx, rq->internal_tag); 95 } 96 97 static inline void blk_mq_sched_started_request(struct request *rq) 98 { 99 struct request_queue *q = rq->q; 100 struct elevator_queue *e = q->elevator; 101 102 if (e && e->type->ops.mq.started_request) 103 e->type->ops.mq.started_request(rq); 104 } 105 106 static inline void blk_mq_sched_requeue_request(struct request *rq) 107 { 108 struct request_queue *q = rq->q; 109 struct elevator_queue *e = q->elevator; 110 111 if (e && e->type->ops.mq.requeue_request) 112 e->type->ops.mq.requeue_request(rq); 113 } 114 115 static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx) 116 { 117 struct elevator_queue *e = hctx->queue->elevator; 118 119 if (e && e->type->ops.mq.has_work) 120 return e->type->ops.mq.has_work(hctx); 121 122 return false; 123 } 124 125 /* 126 * Mark a hardware queue as needing a restart. 127 */ 128 static inline void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx) 129 { 130 if (!test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state)) 131 set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state); 132 } 133 134 /* 135 * Mark a hardware queue and the request queue it belongs to as needing a 136 * restart. 137 */ 138 static inline void blk_mq_sched_mark_restart_queue(struct blk_mq_hw_ctx *hctx) 139 { 140 struct request_queue *q = hctx->queue; 141 142 if (!test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state)) 143 set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state); 144 if (!test_bit(QUEUE_FLAG_RESTART, &q->queue_flags)) 145 set_bit(QUEUE_FLAG_RESTART, &q->queue_flags); 146 } 147 148 static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx) 149 { 150 return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state); 151 } 152 153 #endif 154