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 int blk_mq_map_queues(struct blk_mq_tag_set
*set
);
46 extern int blk_mq_hw_queue_to_node(unsigned int *map
, unsigned int);
48 static inline struct blk_mq_hw_ctx
*blk_mq_map_queue(struct request_queue
*q
,
51 return q
->queue_hw_ctx
[q
->mq_map
[cpu
]];
57 extern int blk_mq_sysfs_register(struct request_queue
*q
);
58 extern void blk_mq_sysfs_unregister(struct request_queue
*q
);
59 extern void blk_mq_hctx_kobj_init(struct blk_mq_hw_ctx
*hctx
);
61 extern void blk_mq_rq_timed_out(struct request
*req
, bool reserved
);
63 void blk_mq_release(struct request_queue
*q
);
65 static inline struct blk_mq_ctx
*__blk_mq_get_ctx(struct request_queue
*q
,
68 return per_cpu_ptr(q
->queue_ctx
, cpu
);
72 * This assumes per-cpu software queueing queues. They could be per-node
73 * as well, for instance. For now this is hardcoded as-is. Note that we don't
74 * care about preemption, since we know the ctx's are persistent. This does
75 * mean that we can't rely on ctx always matching the currently running CPU.
77 static inline struct blk_mq_ctx
*blk_mq_get_ctx(struct request_queue
*q
)
79 return __blk_mq_get_ctx(q
, get_cpu());
82 static inline void blk_mq_put_ctx(struct blk_mq_ctx
*ctx
)
87 struct blk_mq_alloc_data
{
89 struct request_queue
*q
;
92 /* input & output parameter */
93 struct blk_mq_ctx
*ctx
;
94 struct blk_mq_hw_ctx
*hctx
;
97 static inline void blk_mq_set_alloc_data(struct blk_mq_alloc_data
*data
,
98 struct request_queue
*q
, unsigned int flags
,
99 struct blk_mq_ctx
*ctx
, struct blk_mq_hw_ctx
*hctx
)
107 static inline bool blk_mq_hctx_stopped(struct blk_mq_hw_ctx
*hctx
)
109 return test_bit(BLK_MQ_S_STOPPED
, &hctx
->state
);
112 static inline bool blk_mq_hw_queue_mapped(struct blk_mq_hw_ctx
*hctx
)
114 return hctx
->nr_ctx
&& hctx
->tags
;