diff options
Diffstat (limited to 'block/blk-mq.h')
| -rw-r--r-- | block/blk-mq.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/block/blk-mq.h b/block/blk-mq.h new file mode 100644 index 000000000000..52bf1f96a2c2 --- /dev/null +++ b/block/blk-mq.h @@ -0,0 +1,52 @@ +#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); + +/* + * 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 |