11 struct list_head rq_list;
12 } ____cacheline_aligned_in_smp;
15 unsigned int index_hw;
17 /* incremented at dispatch time */
18 unsigned long rq_dispatched[2];
19 unsigned long rq_merged;
21 /* incremented at completion time */
22 unsigned long ____cacheline_aligned_in_smp rq_completed[2];
23 struct blk_rq_stat stat[2];
25 struct request_queue *queue;
27 } ____cacheline_aligned_in_smp;
29 void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async);
30 void blk_mq_freeze_queue(struct request_queue *q);
31 void blk_mq_free_queue(struct request_queue *q);
32 int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr);
33 void blk_mq_wake_waiters(struct request_queue *q);
34 bool blk_mq_dispatch_rq_list(struct blk_mq_hw_ctx *, struct list_head *);
39 void blk_mq_enable_hotplug(void);
40 void blk_mq_disable_hotplug(void);
43 * CPU -> queue mappings
45 extern int blk_mq_hw_queue_to_node(unsigned int *map, unsigned int);
47 static inline struct blk_mq_hw_ctx *blk_mq_map_queue(struct request_queue *q,
50 return q->queue_hw_ctx[q->mq_map[cpu]];
56 extern int blk_mq_sysfs_register(struct request_queue *q);
57 extern void blk_mq_sysfs_unregister(struct request_queue *q);
58 extern void blk_mq_hctx_kobj_init(struct blk_mq_hw_ctx *hctx);
60 extern void blk_mq_rq_timed_out(struct request *req, bool reserved);
62 void blk_mq_release(struct request_queue *q);
64 static inline struct blk_mq_ctx *__blk_mq_get_ctx(struct request_queue *q,
67 return per_cpu_ptr(q->queue_ctx, cpu);
71 * This assumes per-cpu software queueing queues. They could be per-node
72 * as well, for instance. For now this is hardcoded as-is. Note that we don't
73 * care about preemption, since we know the ctx's are persistent. This does
74 * mean that we can't rely on ctx always matching the currently running CPU.
76 static inline struct blk_mq_ctx *blk_mq_get_ctx(struct request_queue *q)
78 return __blk_mq_get_ctx(q, get_cpu());
81 static inline void blk_mq_put_ctx(struct blk_mq_ctx *ctx)
86 struct blk_mq_alloc_data {
88 struct request_queue *q;
91 /* input & output parameter */
92 struct blk_mq_ctx *ctx;
93 struct blk_mq_hw_ctx *hctx;
96 static inline void blk_mq_set_alloc_data(struct blk_mq_alloc_data *data,
97 struct request_queue *q, unsigned int flags,
98 struct blk_mq_ctx *ctx, struct blk_mq_hw_ctx *hctx)
106 static inline bool blk_mq_hctx_stopped(struct blk_mq_hw_ctx *hctx)
108 return test_bit(BLK_MQ_S_STOPPED, &hctx->state);
111 static inline bool blk_mq_hw_queue_mapped(struct blk_mq_hw_ctx *hctx)
113 return hctx->nr_ctx && hctx->tags;