mirror of
https://github.com/FeralInteractive/gamemode.git
synced 2025-06-06 23:57:22 +02:00
247 lines
6.9 KiB
C
247 lines
6.9 KiB
C
/*
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Copyright (c) 2017-2018, Feral Interactive
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All rights reserved.
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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 are met:
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* Redistributions of source code must retain the above copyright notice,
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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 the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Feral Interactive nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#define _GNU_SOURCE
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#include "logging.h"
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#include "external-helper.h"
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#include "gpu-control.h"
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/* Plausible extras to add:
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* Intel support - https://blog.ffwll.ch/2013/03/overclocking-your-intel-gpu-on-linux.html
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* AMD - Allow setting fan speed as well
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* Store baseline values with get_gpu_state to apply when leaving gamemode
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*/
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/* Helper to quit with usage */
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static const char *usage_text =
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"usage: gpuclockctl PCI_ID DEVICE [get] [set CORE MEM [PERF_LEVEL]]]";
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static void print_usage_and_exit(void)
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{
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fprintf(stderr, "%s\n", usage_text);
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exit(EXIT_FAILURE);
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}
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/**
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* Get the gpu state
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* Populates the struct with the GPU info on the system
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*/
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int get_gpu_state(struct GameModeGPUInfo *info)
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{
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fprintf(stderr, "Fetching GPU state is currently unimplemented!\n");
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return info != NULL;
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}
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/**
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* Set the gpu state based on input parameters on Nvidia
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*/
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int set_gpu_state_nv(struct GameModeGPUInfo *info)
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{
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if (info->vendor != Vendor_NVIDIA)
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return -1;
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// These commands don't technically even need root
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/* Set the GPUGraphicsClockOffset parameter */
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char core_arg[128];
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snprintf(core_arg,
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128,
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"[gpu:%ld]/GPUGraphicsClockOffset[%ld]=%ld",
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info->device,
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info->nv_perf_level,
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info->core);
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const char *exec_args_core[] = { "/usr/bin/nvidia-settings", "-a", core_arg, NULL };
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if (run_external_process(exec_args_core) != 0) {
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LOG_ERROR("Failed to set %s!\n", core_arg);
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return -1;
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}
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/* Set the GPUMemoryTransferRateOffset parameter */
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char mem_arg[128];
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snprintf(mem_arg,
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128,
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"[gpu:%ld]/GPUMemoryTransferRateOffset[%ld]=%ld",
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info->device,
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info->nv_perf_level,
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info->mem);
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const char *exec_args_mem[] = { "/usr/bin/nvidia-settings", "-a", mem_arg, NULL };
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if (run_external_process(exec_args_mem) != 0) {
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LOG_ERROR("Failed to set %s!\n", mem_arg);
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return -1;
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}
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return 0;
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}
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/*
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* Sets the value in a file in the AMDGPU driver config
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* Files are:
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* /sys/class/drm/card0/device/pp_sclk_od
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* /sys/class/drm/card0/device/pp_mclk_od
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*/
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static int set_gpu_state_amd_file(const char *filename, long device, long value)
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{
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const char *drm_path = "/sys/class/drm/card%ld/device/%s";
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char path[64];
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snprintf(path, 64, drm_path, device, filename);
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FILE *file = fopen(path, "w");
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if (!file) {
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LOG_ERROR("Could not open %s for write (%s)!\n", path, strerror(errno));
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return -1;
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}
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if (fprintf(file, "%ld", value) < 0) {
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LOG_ERROR("Could not write to %s (%s)!\n", path, strerror(errno));
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return -1;
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}
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if (fclose(file) != 0) {
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LOG_ERROR("Could not close %s after writing (%s)!\n", path, strerror(errno));
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return -1;
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}
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return 0;
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}
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/**
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* Set the gpu state based on input parameters on amd
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*/
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int set_gpu_state_amd(struct GameModeGPUInfo *info)
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{
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if (info->vendor != Vendor_AMD)
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return -1;
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// Set the the core and mem clock speeds using the OverDrive files
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if (set_gpu_state_amd_file("pp_sclk_od", info->device, info->core) != 0)
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return -1;
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if (set_gpu_state_amd_file("pp_mclk_od", info->device, info->mem) != 0)
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return -1;
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return 0;
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}
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/* Helper to get and verify vendor value */
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static long get_vendor(const char *val)
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{
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char *end;
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long ret = strtol(val, &end, 0);
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if (!GPUVendorValid(ret) || end == val) {
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LOG_ERROR("Invalid GPU Vendor passed (0x%04x)!\n", (unsigned short)ret);
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print_usage_and_exit();
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}
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return ret;
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}
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/* Helper to get and verify device value */
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static long get_device(const char *val)
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{
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char *end;
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long ret = strtol(val, &end, 10);
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if (ret < 0 || end == val) {
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LOG_ERROR("Invalid GPU device passed (%ld)!\n", ret);
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print_usage_and_exit();
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}
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return ret;
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}
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/* Helper to get and verify core and mem value */
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static long get_generic_value(const char *val)
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{
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char *end;
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long ret = strtol(val, &end, 10);
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if (ret < 0 || end == val) {
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LOG_ERROR("Invalid value passed (%ld)!\n", ret);
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print_usage_and_exit();
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}
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return ret;
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}
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/**
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* Main entry point, dispatch to the appropriate helper
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*/
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int main(int argc, char *argv[])
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{
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if (argc == 4 && strncmp(argv[3], "get", 3) == 0) {
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/* Get and verify the vendor and device */
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struct GameModeGPUInfo info;
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memset(&info, 0, sizeof(info));
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info.vendor = get_vendor(argv[1]);
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info.device = get_device(argv[2]);
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/* Fetch the state and print it out */
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get_gpu_state(&info);
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printf("%ld %ld\n", info.core, info.mem);
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} else if (argc >= 6 && argc <= 7 && strncmp(argv[3], "set", 3) == 0) {
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/* Must be root to set the state */
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if (geteuid() != 0) {
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fprintf(stderr, "gpuclockctl must be run as root to set values\n");
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print_usage_and_exit();
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}
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/* Get and verify the vendor and device */
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struct GameModeGPUInfo info;
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memset(&info, 0, sizeof(info));
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info.vendor = get_vendor(argv[1]);
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info.device = get_device(argv[2]);
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info.core = get_generic_value(argv[4]);
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info.mem = get_generic_value(argv[5]);
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if (info.vendor == Vendor_NVIDIA)
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info.nv_perf_level = get_generic_value(argv[6]);
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printf("gpuclockctl setting core:%ld mem:%ld on device:%ld with vendor 0x%04x\n",
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info.core,
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info.mem,
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info.device,
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(unsigned short)info.vendor);
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if (info.vendor == Vendor_NVIDIA)
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printf("on Performance Level %ld\n", info.nv_perf_level);
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switch (info.vendor) {
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case Vendor_NVIDIA:
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return set_gpu_state_nv(&info);
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case Vendor_AMD:
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return set_gpu_state_amd(&info);
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default:
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printf("Currently unsupported GPU vendor 0x%04x, doing nothing!\n", (short)info.vendor);
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break;
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}
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} else {
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print_usage_and_exit();
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}
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return EXIT_SUCCESS;
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}
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