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#include "gpu.h"
#include "common/io.h"
#include <hurd.h>
#include <hurd/pci.h>
#include <hurd/paths.h>
enum {
PCI_VENDOR_ID = 0x00,
PCI_DEVICE_ID = 0x02,
PCI_REVISION_ID = 0x08,
PCI_CLASS_PROG = 0x09,
PCI_SUBCLASS = 0x0a,
PCI_CLASS_DEVICE = 0x0b,
PCI_CONF_SIZE = 0x40,
};
const char* ffDetectGPUImpl(FF_A_UNUSED const FFGPUOptions* options, FFlist* gpus) {
int dDomainFd = open(_SERVERS_BUS "/pci/0000", O_RDONLY | O_CLOEXEC);
if (dDomainFd < 0) {
return "open(_SERVERS_BUS \"/pci/0000\") failed";
}
FF_AUTO_CLOSE_DIR DIR* dirDomain = fdopendir(dDomainFd);
if (dirDomain == NULL) {
return "fdopendir(domain) failed";
}
struct dirent* busEntry;
while ((busEntry = readdir(dirDomain)) != NULL) {
if (busEntry->d_type != DT_DIR || busEntry->d_name[0] == '.') {
continue;
}
char* endptr;
uint16_t pciBus = (uint16_t) strtoul(busEntry->d_name, &endptr, 16);
if (*endptr != '\0') {
continue;
}
int dBusFd = openat(dDomainFd, busEntry->d_name, O_RDONLY | O_CLOEXEC);
if (dBusFd < 0) {
continue;
}
FF_AUTO_CLOSE_DIR DIR* dirBus = fdopendir(dBusFd);
if (dirBus == NULL) {
continue;
}
struct dirent* devEntry;
while ((devEntry = readdir(dirBus)) != NULL) {
if (devEntry->d_type != DT_DIR || devEntry->d_name[0] == '.') {
continue;
}
uint8_t pciDev = (uint8_t) strtoul(devEntry->d_name, &endptr, 16);
if (*endptr != '\0') {
continue;
}
int dDevFd = openat(dBusFd, devEntry->d_name, O_RDONLY | O_CLOEXEC);
if (dDevFd < 0) {
continue;
}
FF_AUTO_CLOSE_DIR DIR* dirDev = fdopendir(dDevFd);
if (dirDev == NULL) {
continue;
}
struct dirent* funcEntry;
while ((funcEntry = readdir(dirDev)) != NULL) {
if (funcEntry->d_type != DT_DIR || funcEntry->d_name[0] == '.') {
continue;
}
uint8_t pciFunc = (uint8_t) strtoul(funcEntry->d_name, &endptr, 16);
if (*endptr != '\0') {
continue;
}
char subpath[PATH_MAX];
snprintf(subpath, ARRAY_SIZE(subpath), "%s/%s/%s/%s/config", _SERVERS_BUS "/pci/0000", busEntry->d_name, devEntry->d_name, funcEntry->d_name);
mach_port_t devicePort = file_name_lookup(subpath, 0, 0);
if (devicePort == MACH_PORT_NULL) {
continue;
}
mach_msg_type_number_t nread = 0;
uint8_t data[PCI_CONF_SIZE];
data_t pData = (data_t) data;
kern_return_t kr = pci_conf_read(devicePort, 0, &pData, &nread, PCI_CONF_SIZE);
mach_port_deallocate(mach_task_self(), devicePort);
if (kr != KERN_SUCCESS || nread < PCI_CONF_SIZE) {
continue;
}
if (pData != (data_t) data) {
memcpy(data, pData, PCI_CONF_SIZE);
vm_deallocate(mach_task_self(), (vm_address_t) pData, nread);
}
uint8_t classBase = data[PCI_CLASS_DEVICE];
if (classBase != 0x03 /*PCI_BASE_CLASS_DISPLAY*/) {
continue;
}
uint8_t classSub = data[PCI_SUBCLASS];
if (pciFunc > 0 && classSub == 0x80 /*PCI_CLASS_DISPLAY_OTHER*/) { // Likely an auxiliary display controller (#2034)
continue;
}
uint8_t revision = data[PCI_REVISION_ID];
uint16_t vendorId = data[PCI_VENDOR_ID] | (data[PCI_VENDOR_ID + 1] << 8);
uint16_t deviceId = data[PCI_DEVICE_ID] | (data[PCI_DEVICE_ID + 1] << 8);
FFGPUResult* gpu = FF_LIST_ADD(FFGPUResult, *gpus);
ffStrbufInitStatic(&gpu->vendor, ffGPUGetVendorString(vendorId));
ffStrbufInit(&gpu->name);
ffStrbufInit(&gpu->driver);
ffStrbufInitStatic(&gpu->platformApi, "/servers/bus/pci");
ffStrbufInit(&gpu->memoryType);
gpu->temperature = FF_GPU_TEMP_UNSET;
gpu->coreCount = FF_GPU_CORE_COUNT_UNSET;
gpu->coreUsage = FF_GPU_CORE_USAGE_UNSET;
gpu->type = FF_GPU_TYPE_UNKNOWN;
gpu->dedicated.total = gpu->dedicated.used = gpu->shared.total = gpu->shared.used = FF_GPU_VMEM_SIZE_UNSET;
gpu->deviceId = ffGPUPciAddr2Id(0, pciBus, pciDev, pciFunc);
gpu->frequency = FF_GPU_FREQUENCY_UNSET;
if (gpu->vendor.chars == FF_GPU_VENDOR_NAME_AMD) {
ffGPUQueryAmdGpuName(deviceId, revision, gpu);
}
if (gpu->name.length == 0) {
ffGPUFillVendorAndName(classSub, vendorId, deviceId, gpu);
}
}
}
}
return NULL;
}
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