gpu: add device id label (#2186)

internal/headers/cfgmgr32/syscall.go

@@ -0,0 +1,94 @@
+// SPDX-License-Identifier: Apache-2.0
+//
+// Copyright The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cfgmgr32
+
+import (
+	"fmt"
+	"unsafe"
+
+	"github.com/prometheus-community/windows_exporter/internal/headers/win32"
+	"golang.org/x/sys/windows"
+)
+
+//nolint:gochecknoglobals
+var (
+	cfgmgr32 = windows.NewLazySystemDLL("cfgmgr32.dll")
+
+	procCMGetDeviceIDListW    = cfgmgr32.NewProc("CM_Get_Device_ID_ListW")
+	procCMGetDeviceIDListSize = cfgmgr32.NewProc("CM_Get_Device_ID_List_SizeW")
+	procCMGetDevNodePropertyW = cfgmgr32.NewProc("CM_Get_DevNode_PropertyW")
+	procCMLocateDevNodeW      = cfgmgr32.NewProc("CM_Locate_DevNodeW")
+)
+
+func CMGetDeviceIDListSize(filter *win32.LPWSTR, size *uint32) error {
+	ret, _, _ := procCMGetDeviceIDListSize.Call(
+		uintptr(unsafe.Pointer(size)),
+		filter.Pointer(),
+		uintptr(CM_GETIDLIST_FILTER_PRESENT|CM_GETIDLIST_FILTER_ENUMERATOR),
+	)
+
+	if ret != CR_SUCCESS {
+		return fmt.Errorf("CMGetDeviceIDListSize failed: 0x%02X", ret)
+	}
+
+	return nil
+}
+
+func CMGetDeviceIDList(filter *win32.LPWSTR, buf []uint16) error {
+	ret, _, _ := procCMGetDeviceIDListW.Call(
+		filter.Pointer(),
+		uintptr(unsafe.Pointer(&buf[0])),
+		uintptr(len(buf)),
+		uintptr(CM_GETIDLIST_FILTER_PRESENT|CM_GETIDLIST_FILTER_ENUMERATOR),
+	)
+
+	if ret != CR_SUCCESS {
+		return fmt.Errorf("CMGetDeviceIDList failed: 0x%02X", ret)
+	}
+
+	return nil
+}
+
+func CMLocateDevNode(devInst **windows.Handle, deviceID []uint16) error {
+	ret, _, _ := procCMLocateDevNodeW.Call(
+		uintptr(unsafe.Pointer(devInst)),
+		uintptr(unsafe.Pointer(&deviceID[0])),
+		0,
+	)
+
+	if ret != CR_SUCCESS {
+		return fmt.Errorf("CMLocateDevNode failed: 0x%02X", ret)
+	}
+
+	return nil
+}
+
+func CMGetDevNodeProperty(devInst *windows.Handle, propKey *DEVPROPKEY, propType *uint32, buf unsafe.Pointer, bufLen *uint32) error {
+	ret, _, _ := procCMGetDevNodePropertyW.Call(
+		uintptr(unsafe.Pointer(devInst)),
+		uintptr(unsafe.Pointer(propKey)),
+		uintptr(unsafe.Pointer(propType)),
+		uintptr(buf),
+		uintptr(unsafe.Pointer(bufLen)),
+		0,
+	)
+
+	if ret != CR_SUCCESS {
+		return fmt.Errorf("CMGetDevNodeProperty failed: 0x%02X", ret)
+	}
+
+	return nil
+}