1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _BCACHEFS_CLOCK_TYPES_H
 3#define _BCACHEFS_CLOCK_TYPES_H
 4
 5#include "util.h"
 6
 7#define NR_IO_TIMERS		(BCH_SB_MEMBERS_MAX * 3)
 8
 9/*
10 * Clocks/timers in units of sectors of IO:
11 *
12 * Note - they use percpu batching, so they're only approximate.
13 */
14
15struct io_timer;
16typedef void (*io_timer_fn)(struct io_timer *);
17
18struct io_timer {
19	io_timer_fn		fn;
20	unsigned long		expire;
21};
22
23/* Amount to buffer up on a percpu counter */
24#define IO_CLOCK_PCPU_SECTORS	128
25
26typedef HEAP(struct io_timer *)	io_timer_heap;
27
28struct io_clock {
29	atomic64_t		now;
30	u16 __percpu		*pcpu_buf;
31	unsigned		max_slop;
32
33	spinlock_t		timer_lock;
34	io_timer_heap		timers;
35};
36
37#endif /* _BCACHEFS_CLOCK_TYPES_H */