Merge branch 'add-numa-node-to-nvpci' into 'master'

Add numa node as a standard field in the nvpci struct

See merge request nvidia/cloud-native/go-nvlib!2

pkg/nvpci/mock.go

@@ -25,17 +25,13 @@ import (
 	"gitlab.com/nvidia/cloud-native/go-nvlib/pkg/nvpci/bytes"
 )
 
-type MockA100 struct {
+type MockNvpci struct {
 	*nvpci
 }
 
-func (m *MockA100) Cleanup() {
-	os.RemoveAll(m.pciDevicesRoot)
-}
+var _ Interface = (*MockNvpci)(nil)
 
-var _ Interface = (*MockA100)(nil)
-
-func NewMockA100() (mock *MockA100, rerr error) {
+func NewMockNvpci() (mock *MockNvpci, rerr error) {
 	rootDir, err := ioutil.TempDir("", "")
 	if err != nil {
 		return nil, err
@@ -46,42 +42,63 @@ func NewMockA100() (mock *MockA100, rerr error) {
 		}
 	}()
 
-	deviceDir := filepath.Join(rootDir, "0000:80:05.1")
-	err = os.MkdirAll(deviceDir, 0755)
+	mock = &MockNvpci{
+		&nvpci{rootDir},
+	}
+
+	return mock, nil
+}
+
+func (m *MockNvpci) Cleanup() {
+	os.RemoveAll(m.pciDevicesRoot)
+}
+
+func (m *MockNvpci) AddMockA100(address string, numaNode int) error {
+	deviceDir := filepath.Join(m.pciDevicesRoot, address)
+	err := os.MkdirAll(deviceDir, 0755)
 	if err != nil {
-		return nil, err
+		return err
 	}
 
 	vendor, err := os.Create(filepath.Join(deviceDir, "vendor"))
 	if err != nil {
-		return nil, err
+		return err
 	}
 	_, err = vendor.WriteString(fmt.Sprintf("0x%x", pciNvidiaVendorID))
 	if err != nil {
-		return nil, err
+		return err
 	}
 
 	class, err := os.Create(filepath.Join(deviceDir, "class"))
 	if err != nil {
-		return nil, err
+		return err
 	}
 	_, err = class.WriteString(fmt.Sprintf("0x%x", pci3dControllerClass))
 	if err != nil {
-		return nil, err
+		return err
 	}
 
 	device, err := os.Create(filepath.Join(deviceDir, "device"))
 	if err != nil {
-		return nil, err
+		return err
 	}
 	_, err = device.WriteString("0x20bf")
 	if err != nil {
-		return nil, err
+		return err
+	}
+
+	numa, err := os.Create(filepath.Join(deviceDir, "numa_node"))
+	if err != nil {
+		return err
+	}
+	_, err = numa.WriteString(fmt.Sprintf("%v", numaNode))
+	if err != nil {
+		return err
 	}
 
 	config, err := os.Create(filepath.Join(deviceDir, "config"))
 	if err != nil {
-		return nil, err
+		return err
 	}
 	_data := make([]byte, pciCfgSpaceStandardSize)
 	data := bytes.New(&_data)
@@ -89,32 +106,28 @@ func NewMockA100() (mock *MockA100, rerr error) {
 	data.Write16(2, uint16(0x20bf))
 	_, err = config.Write(*data.Raw())
 	if err != nil {
-		return nil, err
+		return err
 	}
 
 	bar0 := []uint64{0x00000000c2000000, 0x00000000c2ffffff, 0x0000000000040200}
 	resource, err := os.Create(filepath.Join(deviceDir, "resource"))
 	_, err = resource.WriteString(fmt.Sprintf("0x%x 0x%x 0x%x", bar0[0], bar0[1], bar0[2]))
 	if err != nil {
-		return nil, err
+		return err
 	}
 
 	pmcID := uint32(0x170000a1)
 	resource0, err := os.Create(filepath.Join(deviceDir, "resource0"))
 	if err != nil {
-		return nil, err
+		return err
 	}
 	_data = make([]byte, bar0[1]-bar0[0]+1)
 	data = bytes.New(&_data).LittleEndian()
 	data.Write32(0, pmcID)
 	_, err = resource0.Write(*data.Raw())
 	if err != nil {
-		return nil, err
+		return err
 	}
 
-	mock = &MockA100{
-		&nvpci{rootDir},
-	}
-
-	return mock, nil
+	return nil
 }

pkg/nvpci/nvpci.go

@@ -61,6 +61,7 @@ type NvidiaPCIDevice struct {
 	Vendor    uint16
 	Class     uint32
 	Device    uint16
+	NumaNode  int
 	Config    *ConfigSpace
 	Resources map[int]*MemoryResource
 }
@@ -147,6 +148,16 @@ func (p *nvpci) GetAllDevices() ([]*NvidiaPCIDevice, error) {
 			return nil, fmt.Errorf("unable to convert device string to uint16: %v", deviceStr)
 		}
 
+		numa, err := ioutil.ReadFile(path.Join(devicePath, "numa_node"))
+		if err != nil {
+			return nil, fmt.Errorf("unable to read PCI NUMA node for %s: %v", address, err)
+		}
+		numaStr := strings.TrimSpace(string(numa))
+		numaNode, err := strconv.ParseInt(numaStr, 0, 64)
+		if err != nil {
+			return nil, fmt.Errorf("unable to convert NUMA node string to int64: %v", numaNode)
+		}
+
 		config := &ConfigSpace{
 			Path: path.Join(devicePath, "config"),
 		}
@@ -183,6 +194,7 @@ func (p *nvpci) GetAllDevices() ([]*NvidiaPCIDevice, error) {
 			Vendor:    uint16(vendorID),
 			Class:     uint32(classID),
 			Device:    uint16(deviceID),
+			NumaNode:  int(numaNode),
 			Config:    config,
 			Resources: resources,
 		}

pkg/nvpci/nvpci_test.go

@@ -27,14 +27,19 @@ const (
 )
 
 func TestNvpci(t *testing.T) {
-	nvpci, err := NewMockA100()
-	require.Nil(t, err, "Error creating NewMockA100")
+	nvpci, err := NewMockNvpci()
+	require.Nil(t, err, "Error creating NewMockNvpci")
 	defer nvpci.Cleanup()
 
+	err = nvpci.AddMockA100("0000:80:05.1", 0)
+	require.Nil(t, err, "Error adding Mock A100 device to MockNvpci")
+
 	devices, err := nvpci.GetGPUs()
 	require.Nil(t, err, "Error getting GPUs")
 	require.Equal(t, 1, len(devices), "Wrong number of GPU devices")
 	require.Equal(t, 1, len(devices[0].Resources), "Wrong number GPU resources found")
+	require.Equal(t, "0000:80:05.1", devices[0].Address, "Wrong Address found for device")
+	require.Equal(t, 0, devices[0].NumaNode, "Wrong NUMA node found for device")
 
 	config, err := devices[0].Config.Read()
 	require.Nil(t, err, "Error reading config")
@@ -58,3 +63,39 @@ func TestNvpci(t *testing.T) {
 	require.Equal(t, int(resource0.End-resource0.Start+1), bar0.Len())
 	require.Equal(t, ga100PmcID, bar0.Read32(0))
 }
+
+func TestNvpciNUMANode(t *testing.T) {
+	testCases := []struct {
+		Description string
+		NumaNode    int
+	}{
+		{
+			Description: "Numa Node -1",
+			NumaNode:    -1,
+		},
+		{
+			Description: "Numa Node 0",
+			NumaNode:    0,
+		},
+		{
+			Description: "Numa Node 1",
+			NumaNode:    1,
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.Description, func(t *testing.T) {
+			nvpci, err := NewMockNvpci()
+			require.Nil(t, err, "Error creating NewMockNvpci")
+			defer nvpci.Cleanup()
+
+			err = nvpci.AddMockA100("0000:80:05.1", tc.NumaNode)
+			require.Nil(t, err, "Error adding Mock A100 device to MockNvpci")
+
+			devices, err := nvpci.GetGPUs()
+			require.Nil(t, err, "Error getting GPUs")
+			require.Equal(t, 1, len(devices), "Wrong number of GPU devices")
+			require.Equal(t, tc.NumaNode, devices[0].NumaNode, "Wrong NUMA node found for device")
+		})
+	}
+}