[mirror_ubuntu-zesty-kernel.git] / block / blk-mq.h

#ifndef INT_BLK_MQ_H
#define INT_BLK_MQ_H

struct blk_mq_ctx {
	struct {
		spinlock_t		lock;
		struct list_head	rq_list;
	}  ____cacheline_aligned_in_smp;

	unsigned int		cpu;
	unsigned int		index_hw;
	unsigned int		ipi_redirect;

	/* incremented at dispatch time */
	unsigned long		rq_dispatched[2];
	unsigned long		rq_merged;

	/* incremented at completion time */
	unsigned long		____cacheline_aligned_in_smp rq_completed[2];

	struct request_queue	*queue;
	struct kobject		kobj;
};

void __blk_mq_end_io(struct request *rq, int error);
void blk_mq_complete_request(struct request *rq, int error);
void blk_mq_run_request(struct request *rq, bool run_queue, bool async);
void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async);
void blk_mq_init_flush(struct request_queue *q);
void blk_mq_drain_queue(struct request_queue *q);

/*
 * CPU hotplug helpers
 */
struct blk_mq_cpu_notifier;
void blk_mq_init_cpu_notifier(struct blk_mq_cpu_notifier *notifier,
			      void (*fn)(void *, unsigned long, unsigned int),
			      void *data);
void blk_mq_register_cpu_notifier(struct blk_mq_cpu_notifier *notifier);
void blk_mq_unregister_cpu_notifier(struct blk_mq_cpu_notifier *notifier);
void blk_mq_cpu_init(void);
DECLARE_PER_CPU(struct llist_head, ipi_lists);

/*
 * CPU -> queue mappings
 */
struct blk_mq_reg;
extern unsigned int *blk_mq_make_queue_map(struct blk_mq_reg *reg);
extern int blk_mq_update_queue_map(unsigned int *map, unsigned int nr_queues);

void blk_mq_add_timer(struct request *rq);

#endif
Commit	Line	Data
320ae51f JA	1	#ifndef INT_BLK_MQ_H
	2	#define INT_BLK_MQ_H
	3
	4	struct blk_mq_ctx {
	5	struct {
	6	spinlock_t lock;
	7	struct list_head rq_list;
	8	} ____cacheline_aligned_in_smp;
	9
	10	unsigned int cpu;
	11	unsigned int index_hw;
	12	unsigned int ipi_redirect;
	13
	14	/* incremented at dispatch time */
	15	unsigned long rq_dispatched[2];
	16	unsigned long rq_merged;
	17
	18	/* incremented at completion time */
	19	unsigned long ____cacheline_aligned_in_smp rq_completed[2];
	20
	21	struct request_queue *queue;
	22	struct kobject kobj;
	23	};
	24
	25	void __blk_mq_end_io(struct request *rq, int error);
	26	void blk_mq_complete_request(struct request *rq, int error);
	27	void blk_mq_run_request(struct request *rq, bool run_queue, bool async);
	28	void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async);
	29	void blk_mq_init_flush(struct request_queue *q);
43a5e4e2	30	void blk_mq_drain_queue(struct request_queue *q);
320ae51f JA	31
	32	/*
	33	* CPU hotplug helpers
	34	*/
	35	struct blk_mq_cpu_notifier;
	36	void blk_mq_init_cpu_notifier(struct blk_mq_cpu_notifier *notifier,
	37	void (fn)(void , unsigned long, unsigned int),
	38	void *data);
	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	DECLARE_PER_CPU(struct llist_head, ipi_lists);
	43
	44	/*
	45	* CPU -> queue mappings
	46	*/
	47	struct blk_mq_reg;
	48	extern unsigned int blk_mq_make_queue_map(struct blk_mq_reg reg);
	49	extern int blk_mq_update_queue_map(unsigned int *map, unsigned int nr_queues);
	50
	51	void blk_mq_add_timer(struct request *rq);
	52
	53	#endif