compute-runtime/shared/source/os_interface/linux/device_time_drm.cpp

146 lines
3.7 KiB
C++

/*
* Copyright (C) 2017-2021 Intel Corporation
*
* SPDX-License-Identifier: MIT
*
*/
#include "shared/source/os_interface/linux/device_time_drm.h"
#include "shared/source/os_interface/linux/drm_neo.h"
#include "shared/source/os_interface/os_interface.h"
#include "drm/i915_drm.h"
#include <time.h>
namespace NEO {
DeviceTimeDrm::DeviceTimeDrm(OSInterface *osInterface) {
if (osInterface) {
pDrm = osInterface->getDriverModel()->as<Drm>();
}
timestampTypeDetect();
}
void DeviceTimeDrm::timestampTypeDetect() {
struct drm_i915_reg_read reg = {};
int err;
if (pDrm == nullptr)
return;
reg.offset = (TIMESTAMP_LOW_REG | 1);
err = pDrm->ioctl(DRM_IOCTL_I915_REG_READ, &reg);
if (err) {
reg.offset = TIMESTAMP_HIGH_REG;
err = pDrm->ioctl(DRM_IOCTL_I915_REG_READ, &reg);
if (err) {
getGpuTime = &DeviceTimeDrm::getGpuTime32;
timestampSizeInBits = OCLRT_NUM_TIMESTAMP_BITS_FALLBACK;
} else {
getGpuTime = &DeviceTimeDrm::getGpuTimeSplitted;
timestampSizeInBits = OCLRT_NUM_TIMESTAMP_BITS;
}
} else {
getGpuTime = &DeviceTimeDrm::getGpuTime36;
timestampSizeInBits = OCLRT_NUM_TIMESTAMP_BITS;
}
}
bool DeviceTimeDrm::getGpuTime32(uint64_t *timestamp) {
struct drm_i915_reg_read reg = {};
reg.offset = TIMESTAMP_LOW_REG;
if (pDrm->ioctl(DRM_IOCTL_I915_REG_READ, &reg)) {
return false;
}
*timestamp = reg.val >> 32;
return true;
}
bool DeviceTimeDrm::getGpuTime36(uint64_t *timestamp) {
struct drm_i915_reg_read reg = {};
reg.offset = TIMESTAMP_LOW_REG | 1;
if (pDrm->ioctl(DRM_IOCTL_I915_REG_READ, &reg)) {
return false;
}
*timestamp = reg.val;
return true;
}
bool DeviceTimeDrm::getGpuTimeSplitted(uint64_t *timestamp) {
struct drm_i915_reg_read reg_hi = {};
struct drm_i915_reg_read reg_lo = {};
uint64_t tmp_hi;
int err = 0, loop = 3;
reg_hi.offset = TIMESTAMP_HIGH_REG;
reg_lo.offset = TIMESTAMP_LOW_REG;
err += pDrm->ioctl(DRM_IOCTL_I915_REG_READ, &reg_hi);
do {
tmp_hi = reg_hi.val;
err += pDrm->ioctl(DRM_IOCTL_I915_REG_READ, &reg_lo);
err += pDrm->ioctl(DRM_IOCTL_I915_REG_READ, &reg_hi);
} while (err == 0 && reg_hi.val != tmp_hi && --loop);
if (err) {
return false;
}
*timestamp = reg_lo.val | (reg_hi.val << 32);
return true;
}
bool DeviceTimeDrm::getCpuGpuTime(TimeStampData *pGpuCpuTime, OSTime *osTime) {
if (nullptr == this->getGpuTime) {
return false;
}
if (!(this->*getGpuTime)(&pGpuCpuTime->GPUTimeStamp)) {
return false;
}
if (!osTime->getCpuTime(&pGpuCpuTime->CPUTimeinNS)) {
return false;
}
return true;
}
double DeviceTimeDrm::getDynamicDeviceTimerResolution(HardwareInfo const &hwInfo) const {
if (pDrm) {
drm_i915_getparam_t getParam = {};
int frequency = 0;
getParam.param = I915_PARAM_CS_TIMESTAMP_FREQUENCY;
getParam.value = &frequency;
auto error = pDrm->ioctl(DRM_IOCTL_I915_GETPARAM, &getParam);
if (!error) {
return 1000000000.0 / frequency;
}
}
return OSTime::getDeviceTimerResolution(hwInfo);
}
uint64_t DeviceTimeDrm::getDynamicDeviceTimerClock(HardwareInfo const &hwInfo) const {
if (pDrm) {
drm_i915_getparam_t getParam = {};
int frequency = 0;
getParam.param = I915_PARAM_CS_TIMESTAMP_FREQUENCY;
getParam.value = &frequency;
auto error = pDrm->ioctl(DRM_IOCTL_I915_GETPARAM, &getParam);
if (!error) {
return static_cast<uint64_t>(frequency);
}
}
return static_cast<uint64_t>(1000000000.0 / OSTime::getDeviceTimerResolution(hwInfo));
}
} // namespace NEO