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/sys/bus/pci/devices doesn't exist as kms-drm exports sysfs via sysctl
$ clinfo | fgrep clock
Max clock frequency 0MHz
--- shared/source/os_interface/linux/drm_neo.cpp.orig 2021-09-10 14:22:47 UTC
+++ shared/source/os_interface/linux/drm_neo.cpp
@@ -34,6 +34,13 @@
#include <cstdio>
#include <cstring>
+#if defined(__FreeBSD__)
+#include <sys/param.h>
+#include <sys/sysctl.h>
+#include <cstdio>
+#include <cstdlib>
+#endif
+
namespace NEO {
namespace IoctlHelper {
@@ -800,6 +807,26 @@ bool Drm::sysmanQueryEngineInfo() {
int getMaxGpuFrequencyOfDevice(Drm &drm, std::string &sysFsPciPath, int &maxGpuFrequency) {
maxGpuFrequency = 0;
+#if defined(__FreeBSD__)
+ char name[SPECNAMELEN + 1];
+ if (!fdevname_r(drm.getFileDescriptor(), name, sizeof(name))) {
+ return 0;
+ }
+ int id;
+ if (!sscanf(name, "drm/%d", &id) && !sscanf(name, "dri/renderD%d", &id)) {
+ return 0;
+ }
+
+ char oid[MAXPATHLEN + 1];
+ char max_freq[PAGE_SIZE];
+ size_t len = sizeof(max_freq);
+ snprintf(oid, sizeof(oid), "sys.class.drm.card%d.gt_max_freq_mhz", id - 128);
+ if (sysctlbyname(oid, &max_freq, &len, NULL, 0)) {
+ return 0;
+ }
+
+ maxGpuFrequency = std::stoi(max_freq);
+#else
std::string clockSysFsPath = sysFsPciPath + "/gt_max_freq_mhz";
std::ifstream ifs(clockSysFsPath.c_str(), std::ifstream::in);
@@ -809,6 +836,7 @@ int getMaxGpuFrequencyOfDevice(Drm &drm, std::string &
ifs >> maxGpuFrequency;
ifs.close();
+#endif
return 0;
}
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