| Jens Axboe | 5e605b6 | 2009-08-05 09:07:21 +0200 | [diff] [blame^] | 1 | #ifndef BLK_IOPOLL_H |
| 2 | #define BLK_IOPOLL_H |
| 3 | |
| 4 | struct blk_iopoll; |
| 5 | typedef int (blk_iopoll_fn)(struct blk_iopoll *, int); |
| 6 | |
| 7 | struct blk_iopoll { |
| 8 | struct list_head list; |
| 9 | unsigned long state; |
| 10 | unsigned long data; |
| 11 | int weight; |
| 12 | int max; |
| 13 | blk_iopoll_fn *poll; |
| 14 | }; |
| 15 | |
| 16 | enum { |
| 17 | IOPOLL_F_SCHED = 0, |
| 18 | IOPOLL_F_DISABLE = 1, |
| 19 | }; |
| 20 | |
| 21 | static inline int blk_iopoll_sched_prep(struct blk_iopoll *iop) |
| 22 | { |
| 23 | return !test_bit(IOPOLL_F_DISABLE, &iop->state) && |
| 24 | !test_and_set_bit(IOPOLL_F_SCHED, &iop->state); |
| 25 | } |
| 26 | |
| 27 | static inline int blk_iopoll_disable_pending(struct blk_iopoll *iop) |
| 28 | { |
| 29 | return test_bit(IOPOLL_F_DISABLE, &iop->state); |
| 30 | } |
| 31 | |
| 32 | extern void blk_iopoll_sched(struct blk_iopoll *); |
| 33 | extern void blk_iopoll_init(struct blk_iopoll *, int, blk_iopoll_fn *); |
| 34 | extern void blk_iopoll_complete(struct blk_iopoll *); |
| 35 | extern void __blk_iopoll_complete(struct blk_iopoll *); |
| 36 | extern void blk_iopoll_enable(struct blk_iopoll *); |
| 37 | extern void blk_iopoll_disable(struct blk_iopoll *); |
| 38 | |
| 39 | extern int blk_iopoll_enabled; |
| 40 | |
| 41 | #endif |