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 void blk_mq_enable_hotplug(void);
36 void blk_mq_disable_hotplug(void);
39 * CPU -> queue mappings
41 int blk_mq_map_queues(struct blk_mq_tag_set
*set
);
42 extern int blk_mq_hw_queue_to_node(unsigned int *map
, unsigned int);
44 static inline struct blk_mq_hw_ctx
*blk_mq_map_queue(struct request_queue
*q
,
47 return q
->queue_hw_ctx
[q
->mq_map
[cpu
]];
53 extern void blk_mq_sysfs_init(struct request_queue
*q
);
54 extern int blk_mq_sysfs_register(struct request_queue
*q
);
55 extern void blk_mq_sysfs_unregister(struct request_queue
*q
);
56 extern void blk_mq_hctx_kobj_init(struct blk_mq_hw_ctx
*hctx
);
58 extern void blk_mq_rq_timed_out(struct request
*req
, bool reserved
);
60 void blk_mq_release(struct request_queue
*q
);
62 static inline struct blk_mq_ctx
*__blk_mq_get_ctx(struct request_queue
*q
,
65 return per_cpu_ptr(q
->queue_ctx
, cpu
);
69 * This assumes per-cpu software queueing queues. They could be per-node
70 * as well, for instance. For now this is hardcoded as-is. Note that we don't
71 * care about preemption, since we know the ctx's are persistent. This does
72 * mean that we can't rely on ctx always matching the currently running CPU.
74 static inline struct blk_mq_ctx
*blk_mq_get_ctx(struct request_queue
*q
)
76 return __blk_mq_get_ctx(q
, get_cpu());
79 static inline void blk_mq_put_ctx(struct blk_mq_ctx
*ctx
)
84 struct blk_mq_alloc_data
{
86 struct request_queue
*q
;
89 /* input & output parameter */
90 struct blk_mq_ctx
*ctx
;
91 struct blk_mq_hw_ctx
*hctx
;
94 static inline void blk_mq_set_alloc_data(struct blk_mq_alloc_data
*data
,
95 struct request_queue
*q
, unsigned int flags
,
96 struct blk_mq_ctx
*ctx
, struct blk_mq_hw_ctx
*hctx
)
104 static inline bool blk_mq_hw_queue_mapped(struct blk_mq_hw_ctx
*hctx
)
106 return hctx
->nr_ctx
&& hctx
->tags
;