135 lines
3.1 KiB
C
135 lines
3.1 KiB
C
/*
|
|
* Copyright (C) 2018 Intel Corporation.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#ifndef COMMON_TIMER_H
|
|
#define COMMON_TIMER_H
|
|
|
|
#include <list.h>
|
|
#include <ticks.h>
|
|
|
|
/**
|
|
* @brief Timer
|
|
*
|
|
* @defgroup timer ACRN Timer
|
|
* @{
|
|
*/
|
|
|
|
typedef void (*timer_handle_t)(void *data);
|
|
|
|
/**
|
|
* @brief Definition of timer tick mode
|
|
*/
|
|
enum tick_mode {
|
|
TICK_MODE_ONESHOT = 0, /**< one-shot mode */
|
|
TICK_MODE_PERIODIC, /**< periodic mode */
|
|
};
|
|
|
|
/**
|
|
* @brief Definition of timers for per-cpu
|
|
*/
|
|
struct per_cpu_timers {
|
|
struct list_head timer_list; /**< it's for runtime active timer list */
|
|
};
|
|
|
|
/**
|
|
* @brief Definition of timer
|
|
*/
|
|
struct hv_timer {
|
|
struct list_head node; /**< link all timers */
|
|
enum tick_mode mode; /**< timer mode: one-shot or periodic */
|
|
uint64_t timeout; /**< tsc deadline to interrupt */
|
|
uint64_t period_in_cycle; /**< period of the periodic timer in CPU ticks */
|
|
timer_handle_t func; /**< callback if time reached */
|
|
void *priv_data; /**< func private data */
|
|
};
|
|
|
|
/* External Interfaces */
|
|
|
|
/**
|
|
* @brief Initialize a timer structure.
|
|
*
|
|
* @param[in] timer Pointer to timer.
|
|
* @param[in] func irq callback if time reached.
|
|
* @param[in] priv_data func private data.
|
|
* @param[in] timeout tsc deadline to interrupt.
|
|
* @param[in] period_in_cycle period of the periodic timer in unit of TSC cycles.
|
|
*
|
|
* @remark Don't initialize a timer twice if it has been added to the timer list
|
|
* after calling add_timer. If you want to, delete the timer from the list first.
|
|
*
|
|
* @return None
|
|
*/
|
|
void initialize_timer(struct hv_timer *timer,
|
|
timer_handle_t func, void *priv_data,
|
|
uint64_t timeout, uint64_t period_in_cycle);
|
|
|
|
/**
|
|
* @brief Check a timer whether expired.
|
|
*
|
|
* @param[in] timer Pointer to timer.
|
|
* @param[in] now to compare.
|
|
* @param[in] delta Pointer to return the delta (timeout - now) if timer is not expired.
|
|
*
|
|
* @retval true if the timer is expired, false otherwise.
|
|
*/
|
|
bool timer_expired(const struct hv_timer *timer, uint64_t now, uint64_t *delta);
|
|
|
|
/**
|
|
* @brief Check if a timer is active (in the timer list) or not.
|
|
*
|
|
* @param[in] timer Pointer to timer.
|
|
*
|
|
* @retval true if the timer is in timer list, false otherwise.
|
|
*/
|
|
bool timer_is_started(const struct hv_timer *timer);
|
|
|
|
/**
|
|
* @brief Update a timer.
|
|
*
|
|
* @param[in] timer Pointer to timer.
|
|
* @param[in] timeout deadline to interrupt.
|
|
* @param[in] period period of the periodic timer in unit of CPU ticks.
|
|
*
|
|
* @return None
|
|
*/
|
|
void update_timer(struct hv_timer *timer, uint64_t timeout, uint64_t period);
|
|
|
|
/**
|
|
* @brief Add a timer.
|
|
*
|
|
* @param[in] timer Pointer to timer.
|
|
*
|
|
* @retval 0 on success
|
|
* @retval -EINVAL timer has an invalid value
|
|
*
|
|
* @remark Don't call it in the timer callback function or interrupt content.
|
|
*/
|
|
int32_t add_timer(struct hv_timer *timer);
|
|
|
|
/**
|
|
* @brief Delete a timer.
|
|
*
|
|
* @param[in] timer Pointer to timer.
|
|
*
|
|
* @return None
|
|
*
|
|
* @remark Don't call it in the timer callback function or interrupt content.
|
|
*/
|
|
void del_timer(struct hv_timer *timer);
|
|
|
|
/**
|
|
* @brief Initialize timer.
|
|
*
|
|
* @return None
|
|
*/
|
|
void timer_init(void);
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
#endif /* COMMON_TIMER_H */
|