Merge tag 'x86_cache_for_6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

[linux-block.git] / block / blk-mq.h

diff --git a/block/blk-mq.h b/block/blk-mq.h
index a7482d2cc82e721a4c1acf8a0884b22ae9e195ac..e876584d3516340920ab57ba98783de6f431c1cd 100644 (file)
--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -2,8 +2,8 @@
 #ifndef INT_BLK_MQ_H
 #define INT_BLK_MQ_H
 
+#include <linux/blk-mq.h>
 #include "blk-stat.h"
-#include "blk-mq-tag.h"
 
 struct blk_mq_tag_set;
 
@@ -30,6 +30,15 @@ struct blk_mq_ctx {
        struct kobject          kobj;
 } ____cacheline_aligned_in_smp;
 
+enum {
+       BLK_MQ_NO_TAG           = -1U,
+       BLK_MQ_TAG_MIN          = 1,
+       BLK_MQ_TAG_MAX          = BLK_MQ_NO_TAG - 1,
+};
+
+typedef unsigned int __bitwise blk_insert_t;
+#define BLK_MQ_INSERT_AT_HEAD          ((__force blk_insert_t)0x01)
+
 void blk_mq_submit_bio(struct bio *bio);
 int blk_mq_poll(struct request_queue *q, blk_qc_t cookie, struct io_comp_batch *iob,
                unsigned int flags);
@@ -38,8 +47,7 @@ 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 *hctx, struct list_head *,
                             unsigned int);
-void blk_mq_add_to_requeue_list(struct request *rq, bool at_head,
-                               bool kick_requeue_list);
+void blk_mq_add_to_requeue_list(struct request *rq, blk_insert_t insert_flags);
 void blk_mq_flush_busy_ctxs(struct blk_mq_hw_ctx *hctx, struct list_head *list);
 struct request *blk_mq_dequeue_from_ctx(struct blk_mq_hw_ctx *hctx,
                                        struct blk_mq_ctx *start);
@@ -59,14 +67,7 @@ void blk_mq_free_map_and_rqs(struct blk_mq_tag_set *set,
 /*
  * 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);
-void blk_mq_request_bypass_insert(struct request *rq, bool at_head,
-                                 bool run_queue);
-void blk_mq_insert_requests(struct blk_mq_hw_ctx *hctx, struct blk_mq_ctx *ctx,
-                               struct list_head *list);
-void blk_mq_try_issue_list_directly(struct blk_mq_hw_ctx *hctx,
-                                   struct list_head *list);
+void blk_mq_request_bypass_insert(struct request *rq, blk_insert_t flags);
 
 /*
  * CPU -> queue mappings
@@ -164,6 +165,60 @@ struct blk_mq_alloc_data {
        struct blk_mq_hw_ctx *hctx;
 };
 
+struct blk_mq_tags *blk_mq_init_tags(unsigned int nr_tags,
+               unsigned int reserved_tags, int node, int alloc_policy);
+void blk_mq_free_tags(struct blk_mq_tags *tags);
+int blk_mq_init_bitmaps(struct sbitmap_queue *bitmap_tags,
+               struct sbitmap_queue *breserved_tags, unsigned int queue_depth,
+               unsigned int reserved, int node, int alloc_policy);
+
+unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data);
+unsigned long blk_mq_get_tags(struct blk_mq_alloc_data *data, int nr_tags,
+               unsigned int *offset);
+void blk_mq_put_tag(struct blk_mq_tags *tags, struct blk_mq_ctx *ctx,
+               unsigned int tag);
+void blk_mq_put_tags(struct blk_mq_tags *tags, int *tag_array, int nr_tags);
+int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx,
+               struct blk_mq_tags **tags, unsigned int depth, bool can_grow);
+void blk_mq_tag_resize_shared_tags(struct blk_mq_tag_set *set,
+               unsigned int size);
+void blk_mq_tag_update_sched_shared_tags(struct request_queue *q);
+
+void blk_mq_tag_wakeup_all(struct blk_mq_tags *tags, bool);
+void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_tag_iter_fn *fn,
+               void *priv);
+void blk_mq_all_tag_iter(struct blk_mq_tags *tags, busy_tag_iter_fn *fn,
+               void *priv);
+
+static inline struct sbq_wait_state *bt_wait_ptr(struct sbitmap_queue *bt,
+                                                struct blk_mq_hw_ctx *hctx)
+{
+       if (!hctx)
+               return &bt->ws[0];
+       return sbq_wait_ptr(bt, &hctx->wait_index);
+}
+
+void __blk_mq_tag_busy(struct blk_mq_hw_ctx *);
+void __blk_mq_tag_idle(struct blk_mq_hw_ctx *);
+
+static inline void blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
+{
+       if (hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED)
+               __blk_mq_tag_busy(hctx);
+}
+
+static inline void blk_mq_tag_idle(struct blk_mq_hw_ctx *hctx)
+{
+       if (hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED)
+               __blk_mq_tag_idle(hctx);
+}
+
+static inline bool blk_mq_tag_is_reserved(struct blk_mq_tags *tags,
+                                         unsigned int tag)
+{
+       return tag < tags->nr_reserved_tags;
+}
+
 static inline bool blk_mq_is_shared_tags(unsigned int flags)
 {
        return flags & BLK_MQ_F_TAG_HCTX_SHARED;