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1/*2 * Copyright 2020 Red Hat Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR20 * OTHER DEALINGS IN THE SOFTWARE.21 */22#include <nvif/timer.h>23#include <nvif/device.h>24 25s6426nvif_timer_wait_test(struct nvif_timer_wait *wait)27{28 u64 time = nvif_device_time(wait->device);29 30 if (wait->reads == 0) {31 wait->time0 = time;32 wait->time1 = time;33 }34 35 if (wait->time1 == time) {36 if (WARN_ON(wait->reads++ == 16))37 return -ETIMEDOUT;38 } else {39 wait->time1 = time;40 wait->reads = 1;41 }42 43 if (wait->time1 - wait->time0 > wait->limit)44 return -ETIMEDOUT;45 46 return wait->time1 - wait->time0;47}48 49void50nvif_timer_wait_init(struct nvif_device *device, u64 nsec,51 struct nvif_timer_wait *wait)52{53 wait->device = device;54 wait->limit = nsec;55 wait->reads = 0;56}57