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https://github.com/projectacrn/acrn-hypervisor.git
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5df2efad4a
make the timer list be ordered to speed up expried timer process and next timer event finding. Add timer would not schedule timer unless it's the next timer event. Signed-off-by: Li, Fei1 <fei1.li@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com>
85 lines
2.8 KiB
C
85 lines
2.8 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TIMER_H
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#define TIMER_H
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typedef int (*timer_handle_t)(void *);
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enum tick_mode {
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TICK_MODE_ONESHOT = 0,
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TICK_MODE_PERIODIC,
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};
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struct timer {
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struct list_head node; /* link all timers */
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int mode; /* timer mode: one-shot or periodic */
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uint64_t fire_tsc; /* tsc deadline to interrupt */
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uint64_t period_in_cycle; /* period of the periodic timer in unit of TSC cycles */
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timer_handle_t func; /* callback if time reached */
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void *priv_data; /* func private data */
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};
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/*
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* Don't initialize a timer twice if it has been add to the timer list
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* after call add_timer. If u want, delete the timer from the list first.
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*/
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static inline void initialize_timer(struct timer *timer,
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timer_handle_t func,
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void *priv_data,
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uint64_t fire_tsc,
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int mode,
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uint64_t period_in_cycle)
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{
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if (timer) {
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timer->func = func;
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timer->priv_data = priv_data;
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timer->fire_tsc = fire_tsc;
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timer->mode = mode;
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timer->period_in_cycle = period_in_cycle;
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INIT_LIST_HEAD(&timer->node);
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}
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}
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/*
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* Don't call add_timer/del_timer in the timer callback function.
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*/
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int add_timer(struct timer *timer);
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void del_timer(struct timer *timer);
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int timer_softirq(int pcpu_id);
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void timer_init(void);
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void timer_cleanup(void);
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void check_tsc(void);
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void calibrate_tsc(void);
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#endif /* TIMER_H */
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