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gerrit-public.fairphone.software / kernel / msm-4.9 / 3de0ef8d0d3350964720cad2a0a72984f1bb81ba / . / block / blk-mq.h
blob: de7b3bbd5bd61d203799cc24af2f8af3f2c6e396 [file] [log] [blame]
Jens Axboe320ae512013-10-24 09:20:05 +0100[diff] [blame]1#ifndef INT_BLK_MQ_H
2#define INT_BLK_MQ_H
3
Christoph Hellwig24d2f902014-04-15 14:14:00 -0600[diff] [blame]4struct blk_mq_tag_set;
5
Jens Axboe320ae512013-10-24 09:20:05 +0100[diff] [blame]6struct blk_mq_ctx {
7 struct {
8 spinlock_t lock;
9 struct list_head rq_list;
10 } ____cacheline_aligned_in_smp;
11
12 unsigned int cpu;
13 unsigned int index_hw;
Jens Axboe320ae512013-10-24 09:20:05 +0100[diff] [blame]14
Jens Axboe4bb659b2014-05-09 09:36:49 -0600[diff] [blame]15 unsigned int last_tag ____cacheline_aligned_in_smp;
16
Jens Axboe320ae512013-10-24 09:20:05 +0100[diff] [blame]17 /* incremented at dispatch time */
18 unsigned long rq_dispatched[2];
19 unsigned long rq_merged;
20
21 /* incremented at completion time */
22 unsigned long ____cacheline_aligned_in_smp rq_completed[2];
23
24 struct request_queue *queue;
25 struct kobject kobj;
Jens Axboe4bb659b2014-05-09 09:36:49 -0600[diff] [blame]26} ____cacheline_aligned_in_smp;
Jens Axboe320ae512013-10-24 09:20:05 +0100[diff] [blame]27
Christoph Hellwig30a91cb2014-02-10 03:24:38 -0800[diff] [blame]28void __blk_mq_complete_request(struct request *rq);
Jens Axboe320ae512013-10-24 09:20:05 +0100[diff] [blame]29void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async);
30void blk_mq_init_flush(struct request_queue *q);
Ming Lei43a5e4e2013-12-26 21:31:35 +0800[diff] [blame]31void blk_mq_drain_queue(struct request_queue *q);
Ming Lei3edcc0c2013-12-26 21:31:38 +0800[diff] [blame]32void blk_mq_free_queue(struct request_queue *q);
Christoph Hellwig8727af42014-04-14 10:30:08 +0200[diff] [blame]33void blk_mq_clone_flush_request(struct request *flush_rq,
34 struct request *orig_rq);
Jens Axboee3a2b3f2014-05-20 11:49:02 -0600[diff] [blame]35int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr);
Jens Axboe320ae512013-10-24 09:20:05 +0100[diff] [blame]36
37/*
38 * CPU hotplug helpers
39 */
40struct blk_mq_cpu_notifier;
41void blk_mq_init_cpu_notifier(struct blk_mq_cpu_notifier *notifier,
Jens Axboee814e712014-05-21 13:59:08 -0600[diff] [blame]42 int (*fn)(void *, unsigned long, unsigned int),
Jens Axboe320ae512013-10-24 09:20:05 +0100[diff] [blame]43 void *data);
44void blk_mq_register_cpu_notifier(struct blk_mq_cpu_notifier *notifier);
45void blk_mq_unregister_cpu_notifier(struct blk_mq_cpu_notifier *notifier);
46void blk_mq_cpu_init(void);
Jens Axboe676141e2014-03-20 13:29:18 -0600[diff] [blame]47void blk_mq_enable_hotplug(void);
48void blk_mq_disable_hotplug(void);
Jens Axboe320ae512013-10-24 09:20:05 +0100[diff] [blame]49
50/*
51 * CPU -> queue mappings
52 */
Christoph Hellwig24d2f902014-04-15 14:14:00 -0600[diff] [blame]53extern unsigned int *blk_mq_make_queue_map(struct blk_mq_tag_set *set);
Jens Axboe320ae512013-10-24 09:20:05 +0100[diff] [blame]54extern int blk_mq_update_queue_map(unsigned int *map, unsigned int nr_queues);
Jens Axboef14bbe72014-05-27 12:06:53 -0600[diff] [blame]55extern int blk_mq_hw_queue_to_node(unsigned int *map, unsigned int);
Jens Axboe320ae512013-10-24 09:20:05 +0100[diff] [blame]56
Jens Axboee93ecf62014-05-19 09:17:48 -0600[diff] [blame]57/*
Jens Axboe67aec142014-05-30 08:25:36 -0600[diff] [blame]58 * sysfs helpers
59 */
60extern int blk_mq_sysfs_register(struct request_queue *q);
61extern void blk_mq_sysfs_unregister(struct request_queue *q);
62
63/*
Jens Axboee93ecf62014-05-19 09:17:48 -0600[diff] [blame]64 * Basic implementation of sparser bitmap, allowing the user to spread
65 * the bits over more cachelines.
66 */
67struct blk_align_bitmap {
68 unsigned long word;
69 unsigned long depth;
70} ____cacheline_aligned_in_smp;
71
Jens Axboe320ae512013-10-24 09:20:05 +0100[diff] [blame]72#endif