9 struct list_head rq_list;
10 } ____cacheline_aligned_in_smp;
13 unsigned int index_hw;
15 /* incremented at dispatch time */
16 unsigned long rq_dispatched[2];
17 unsigned long rq_merged;
19 /* incremented at completion time */
20 unsigned long ____cacheline_aligned_in_smp rq_completed[2];
22 struct request_queue *queue;
24 } ____cacheline_aligned_in_smp;
26 void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async);
27 void blk_mq_freeze_queue(struct request_queue *q);
28 void blk_mq_free_queue(struct request_queue *q);
29 int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr);
30 void blk_mq_wake_waiters(struct request_queue *q);
35 struct blk_mq_cpu_notifier;
36 void blk_mq_init_cpu_notifier(struct blk_mq_cpu_notifier *notifier,
37 int (*fn)(void *, unsigned long, unsigned int),
39 void blk_mq_register_cpu_notifier(struct blk_mq_cpu_notifier *notifier);
40 void blk_mq_unregister_cpu_notifier(struct blk_mq_cpu_notifier *notifier);
41 void blk_mq_cpu_init(void);
42 void blk_mq_enable_hotplug(void);
43 void blk_mq_disable_hotplug(void);
46 * CPU -> queue mappings
48 extern unsigned int *blk_mq_make_queue_map(struct blk_mq_tag_set *set);
49 extern int blk_mq_update_queue_map(unsigned int *map, unsigned int nr_queues,
50 const struct cpumask *online_mask);
51 extern int blk_mq_hw_queue_to_node(unsigned int *map, unsigned int);
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_hw_queue_mapped(struct blk_mq_hw_ctx *hctx)
108 return hctx->nr_ctx && hctx->tags;