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eec43f3684
We want to reuse the same increased sleep logic in other places. To avoid code duplication, move it to the helper. Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com> Reviewed-by: Matthew Brost <matthew.brost@intel.com> Link: https://patch.msgid.link/20260127193727.601-3-michal.wajdeczko@intel.com
58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2026 Intel Corporation
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*/
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#ifndef _XE_SLEEP_H_
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#define _XE_SLEEP_H_
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#include <linux/delay.h>
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#include <linux/math64.h>
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/**
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* xe_sleep_relaxed_ms() - Sleep for an approximate time.
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* @delay_ms: time in msec to sleep
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*
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* For smaller timeouts, sleep with 0.5ms accuracy.
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*/
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static inline void xe_sleep_relaxed_ms(unsigned int delay_ms)
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{
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unsigned long min_us, max_us;
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if (!delay_ms)
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return;
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if (delay_ms > 20) {
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msleep(delay_ms);
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return;
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}
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min_us = mul_u32_u32(delay_ms, 1000);
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max_us = min_us + 500;
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usleep_range(min_us, max_us);
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}
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/**
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* xe_sleep_exponential_ms() - Sleep for a exponentially increased time.
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* @sleep_period_ms: current time in msec to sleep
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* @max_sleep_ms: maximum time in msec to sleep
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*
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* Sleep for the @sleep_period_ms and exponentially increase this time for the
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* next loop, unless reaching the @max_sleep_ms limit.
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*
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* Return: approximate time in msec the task was delayed.
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*/
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static inline unsigned int xe_sleep_exponential_ms(unsigned int *sleep_period_ms,
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unsigned int max_sleep_ms)
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{
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unsigned int delay_ms = *sleep_period_ms;
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unsigned int next_delay_ms = 2 * delay_ms;
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xe_sleep_relaxed_ms(delay_ms);
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*sleep_period_ms = min(next_delay_ms, max_sleep_ms);
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return delay_ms;
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}
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#endif
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