blk-mq: export some helpers we need to the scheduling framework

[mirror_ubuntu-artful-kernel.git] / block / blk-mq.h

diff --git a/block/blk-mq.h b/block/blk-mq.h
index 63e9116cddbd575c9ed85d716df0e4252f89d261..e59f5ca520a27372062a2866d38a48aad7c3db38 100644 (file)
--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -32,6 +32,21 @@ void blk_mq_free_queue(struct request_queue *q);
 int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr);
 void blk_mq_wake_waiters(struct request_queue *q);
 bool blk_mq_dispatch_rq_list(struct blk_mq_hw_ctx *, struct list_head *);
+void blk_mq_flush_busy_ctxs(struct blk_mq_hw_ctx *hctx, struct list_head *list);
+
+/*
+ * Internal helpers for allocating/freeing the request map
+ */
+void blk_mq_free_rq_map(struct blk_mq_tag_set *set, struct blk_mq_tags *tags,
+                       unsigned int hctx_idx);
+struct blk_mq_tags *blk_mq_init_rq_map(struct blk_mq_tag_set *set,
+                                       unsigned int hctx_idx);
+
+/*
+ * Internal helpers for request insertion into sw queues
+ */
+void __blk_mq_insert_request(struct blk_mq_hw_ctx *hctx, struct request *rq,
+                               bool at_head);
 
 /*
  * CPU hotplug helpers
@@ -103,6 +118,16 @@ static inline void blk_mq_set_alloc_data(struct blk_mq_alloc_data *data,
        data->hctx = hctx;
 }
 
+/*
+ * Internal helpers for request allocation/init/free
+ */
+void blk_mq_rq_ctx_init(struct request_queue *q, struct blk_mq_ctx *ctx,
+                       struct request *rq, unsigned int op);
+void __blk_mq_free_request(struct blk_mq_hw_ctx *hctx, struct blk_mq_ctx *ctx,
+                               struct request *rq);
+struct request *__blk_mq_alloc_request(struct blk_mq_alloc_data *data,
+                                       unsigned int op);
+
 static inline bool blk_mq_hctx_stopped(struct blk_mq_hw_ctx *hctx)
 {
        return test_bit(BLK_MQ_S_STOPPED, &hctx->state);