diff options
Diffstat (limited to 'ANDROID_3.4.5/include/linux/elevator.h')
| -rw-r--r-- | ANDROID_3.4.5/include/linux/elevator.h | 208 |
1 files changed, 0 insertions, 208 deletions
diff --git a/ANDROID_3.4.5/include/linux/elevator.h b/ANDROID_3.4.5/include/linux/elevator.h deleted file mode 100644 index 7d4e0356..00000000 --- a/ANDROID_3.4.5/include/linux/elevator.h +++ /dev/null @@ -1,208 +0,0 @@ -#ifndef _LINUX_ELEVATOR_H -#define _LINUX_ELEVATOR_H - -#include <linux/percpu.h> - -#ifdef CONFIG_BLOCK - -struct io_cq; - -typedef int (elevator_merge_fn) (struct request_queue *, struct request **, - struct bio *); - -typedef void (elevator_merge_req_fn) (struct request_queue *, struct request *, struct request *); - -typedef void (elevator_merged_fn) (struct request_queue *, struct request *, int); - -typedef int (elevator_allow_merge_fn) (struct request_queue *, struct request *, struct bio *); - -typedef void (elevator_bio_merged_fn) (struct request_queue *, - struct request *, struct bio *); - -typedef int (elevator_dispatch_fn) (struct request_queue *, int); - -typedef void (elevator_add_req_fn) (struct request_queue *, struct request *); -typedef struct request *(elevator_request_list_fn) (struct request_queue *, struct request *); -typedef void (elevator_completed_req_fn) (struct request_queue *, struct request *); -typedef int (elevator_may_queue_fn) (struct request_queue *, int); - -typedef void (elevator_init_icq_fn) (struct io_cq *); -typedef void (elevator_exit_icq_fn) (struct io_cq *); -typedef int (elevator_set_req_fn) (struct request_queue *, struct request *, gfp_t); -typedef void (elevator_put_req_fn) (struct request *); -typedef void (elevator_activate_req_fn) (struct request_queue *, struct request *); -typedef void (elevator_deactivate_req_fn) (struct request_queue *, struct request *); - -typedef void *(elevator_init_fn) (struct request_queue *); -typedef void (elevator_exit_fn) (struct elevator_queue *); - -struct elevator_ops -{ - elevator_merge_fn *elevator_merge_fn; - elevator_merged_fn *elevator_merged_fn; - elevator_merge_req_fn *elevator_merge_req_fn; - elevator_allow_merge_fn *elevator_allow_merge_fn; - elevator_bio_merged_fn *elevator_bio_merged_fn; - - elevator_dispatch_fn *elevator_dispatch_fn; - elevator_add_req_fn *elevator_add_req_fn; - elevator_activate_req_fn *elevator_activate_req_fn; - elevator_deactivate_req_fn *elevator_deactivate_req_fn; - - elevator_completed_req_fn *elevator_completed_req_fn; - - elevator_request_list_fn *elevator_former_req_fn; - elevator_request_list_fn *elevator_latter_req_fn; - - elevator_init_icq_fn *elevator_init_icq_fn; /* see iocontext.h */ - elevator_exit_icq_fn *elevator_exit_icq_fn; /* ditto */ - - elevator_set_req_fn *elevator_set_req_fn; - elevator_put_req_fn *elevator_put_req_fn; - - elevator_may_queue_fn *elevator_may_queue_fn; - - elevator_init_fn *elevator_init_fn; - elevator_exit_fn *elevator_exit_fn; -}; - -#define ELV_NAME_MAX (16) - -struct elv_fs_entry { - struct attribute attr; - ssize_t (*show)(struct elevator_queue *, char *); - ssize_t (*store)(struct elevator_queue *, const char *, size_t); -}; - -/* - * identifies an elevator type, such as AS or deadline - */ -struct elevator_type -{ - /* managed by elevator core */ - struct kmem_cache *icq_cache; - - /* fields provided by elevator implementation */ - struct elevator_ops ops; - size_t icq_size; /* see iocontext.h */ - size_t icq_align; /* ditto */ - struct elv_fs_entry *elevator_attrs; - char elevator_name[ELV_NAME_MAX]; - struct module *elevator_owner; - - /* managed by elevator core */ - char icq_cache_name[ELV_NAME_MAX + 5]; /* elvname + "_io_cq" */ - struct list_head list; -}; - -/* - * each queue has an elevator_queue associated with it - */ -struct elevator_queue -{ - struct elevator_type *type; - void *elevator_data; - struct kobject kobj; - struct mutex sysfs_lock; - struct hlist_head *hash; - unsigned int registered:1; -}; - -/* - * block elevator interface - */ -extern void elv_dispatch_sort(struct request_queue *, struct request *); -extern void elv_dispatch_add_tail(struct request_queue *, struct request *); -extern void elv_add_request(struct request_queue *, struct request *, int); -extern void __elv_add_request(struct request_queue *, struct request *, int); -extern int elv_merge(struct request_queue *, struct request **, struct bio *); -extern void elv_merge_requests(struct request_queue *, struct request *, - struct request *); -extern void elv_merged_request(struct request_queue *, struct request *, int); -extern void elv_bio_merged(struct request_queue *q, struct request *, - struct bio *); -extern void elv_requeue_request(struct request_queue *, struct request *); -extern struct request *elv_former_request(struct request_queue *, struct request *); -extern struct request *elv_latter_request(struct request_queue *, struct request *); -extern int elv_register_queue(struct request_queue *q); -extern void elv_unregister_queue(struct request_queue *q); -extern int elv_may_queue(struct request_queue *, int); -extern void elv_abort_queue(struct request_queue *); -extern void elv_completed_request(struct request_queue *, struct request *); -extern int elv_set_request(struct request_queue *, struct request *, gfp_t); -extern void elv_put_request(struct request_queue *, struct request *); -extern void elv_drain_elevator(struct request_queue *); - -/* - * io scheduler registration - */ -extern int elv_register(struct elevator_type *); -extern void elv_unregister(struct elevator_type *); - -/* - * io scheduler sysfs switching - */ -extern ssize_t elv_iosched_show(struct request_queue *, char *); -extern ssize_t elv_iosched_store(struct request_queue *, const char *, size_t); - -extern int elevator_init(struct request_queue *, char *); -extern void elevator_exit(struct elevator_queue *); -extern int elevator_change(struct request_queue *, const char *); -extern bool elv_rq_merge_ok(struct request *, struct bio *); - -/* - * Helper functions. - */ -extern struct request *elv_rb_former_request(struct request_queue *, struct request *); -extern struct request *elv_rb_latter_request(struct request_queue *, struct request *); - -/* - * rb support functions. - */ -extern void elv_rb_add(struct rb_root *, struct request *); -extern void elv_rb_del(struct rb_root *, struct request *); -extern struct request *elv_rb_find(struct rb_root *, sector_t); - -/* - * Return values from elevator merger - */ -#define ELEVATOR_NO_MERGE 0 -#define ELEVATOR_FRONT_MERGE 1 -#define ELEVATOR_BACK_MERGE 2 - -/* - * Insertion selection - */ -#define ELEVATOR_INSERT_FRONT 1 -#define ELEVATOR_INSERT_BACK 2 -#define ELEVATOR_INSERT_SORT 3 -#define ELEVATOR_INSERT_REQUEUE 4 -#define ELEVATOR_INSERT_FLUSH 5 -#define ELEVATOR_INSERT_SORT_MERGE 6 - -/* - * return values from elevator_may_queue_fn - */ -enum { - ELV_MQUEUE_MAY, - ELV_MQUEUE_NO, - ELV_MQUEUE_MUST, -}; - -#define rq_end_sector(rq) (blk_rq_pos(rq) + blk_rq_sectors(rq)) -#define rb_entry_rq(node) rb_entry((node), struct request, rb_node) - -/* - * Hack to reuse the csd.list list_head as the fifo time holder while - * the request is in the io scheduler. Saves an unsigned long in rq. - */ -#define rq_fifo_time(rq) ((unsigned long) (rq)->csd.list.next) -#define rq_set_fifo_time(rq,exp) ((rq)->csd.list.next = (void *) (exp)) -#define rq_entry_fifo(ptr) list_entry((ptr), struct request, queuelist) -#define rq_fifo_clear(rq) do { \ - list_del_init(&(rq)->queuelist); \ - INIT_LIST_HEAD(&(rq)->csd.list); \ - } while (0) - -#endif /* CONFIG_BLOCK */ -#endif |