blk-mq-sched.h 2.4 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. #ifndef BLK_MQ_SCHED_H
  3. #define BLK_MQ_SCHED_H
  4. #include "blk-mq.h"
  5. #include "blk-mq-tag.h"
  6. void blk_mq_sched_assign_ioc(struct request *rq);
  7. void blk_mq_sched_request_inserted(struct request *rq);
  8. bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,
  9. unsigned int nr_segs, struct request **merged_request);
  10. bool __blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
  11. unsigned int nr_segs);
  12. bool blk_mq_sched_try_insert_merge(struct request_queue *q, struct request *rq);
  13. void blk_mq_sched_mark_restart_hctx(struct blk_mq_hw_ctx *hctx);
  14. void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx);
  15. void blk_mq_sched_insert_request(struct request *rq, bool at_head,
  16. bool run_queue, bool async);
  17. void blk_mq_sched_insert_requests(struct blk_mq_hw_ctx *hctx,
  18. struct blk_mq_ctx *ctx,
  19. struct list_head *list, bool run_queue_async);
  20. void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx);
  21. int blk_mq_init_sched(struct request_queue *q, struct elevator_type *e);
  22. void blk_mq_exit_sched(struct request_queue *q, struct elevator_queue *e);
  23. void blk_mq_sched_free_requests(struct request_queue *q);
  24. static inline bool
  25. blk_mq_sched_bio_merge(struct request_queue *q, struct bio *bio,
  26. unsigned int nr_segs)
  27. {
  28. if (blk_queue_nomerges(q) || !bio_mergeable(bio))
  29. return false;
  30. return __blk_mq_sched_bio_merge(q, bio, nr_segs);
  31. }
  32. static inline bool
  33. blk_mq_sched_allow_merge(struct request_queue *q, struct request *rq,
  34. struct bio *bio)
  35. {
  36. struct elevator_queue *e = q->elevator;
  37. if (e && e->type->ops.allow_merge)
  38. return e->type->ops.allow_merge(q, rq, bio);
  39. return true;
  40. }
  41. static inline void blk_mq_sched_completed_request(struct request *rq, u64 now)
  42. {
  43. struct elevator_queue *e = rq->q->elevator;
  44. if (e && e->type->ops.completed_request)
  45. e->type->ops.completed_request(rq, now);
  46. }
  47. static inline void blk_mq_sched_requeue_request(struct request *rq)
  48. {
  49. struct request_queue *q = rq->q;
  50. struct elevator_queue *e = q->elevator;
  51. if ((rq->rq_flags & RQF_ELVPRIV) && e && e->type->ops.requeue_request)
  52. e->type->ops.requeue_request(rq);
  53. }
  54. static inline bool blk_mq_sched_has_work(struct blk_mq_hw_ctx *hctx)
  55. {
  56. struct elevator_queue *e = hctx->queue->elevator;
  57. if (e && e->type->ops.has_work)
  58. return e->type->ops.has_work(hctx);
  59. return false;
  60. }
  61. static inline bool blk_mq_sched_needs_restart(struct blk_mq_hw_ctx *hctx)
  62. {
  63. return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
  64. }
  65. #endif