add regiondevel mode to fpga_plugin

In the `af` mode the plugin announces AFUs and tells kubelet
to pass only AFU ports to containers.

In the `region` mode the plugin announces region interfaces and tells
kubelet to pass only AFU ports to containers.

In the `regiondevel` mode the plugin announces region interfaces and
tells kubelet to pass AFU ports and FME devices to containers, so the
conteainers have full access to the regions.

cmd/fpga_plugin/devicecache/devicecache.go

@@ -33,8 +33,9 @@ import (
 
 // Device Cache's mode of operation
 const (
-	AfMode     = "af"
-	RegionMode = "region"
+	AfMode          = "af"
+	RegionMode      = "region"
+	RegionDevelMode = "regiondevel"
 )
 
 const (
@@ -54,7 +55,8 @@ type UpdateInfo struct {
 
 type getDevMapFunc func(devices []device) map[string]map[string]deviceplugin.DeviceInfo
 
-func getRegionMap(devices []device) map[string]map[string]deviceplugin.DeviceInfo {
+// getRegionMap returns mapping of region interface IDs to AF ports and FME devices
+func getRegionDevelMap(devices []device) map[string]map[string]deviceplugin.DeviceInfo {
 	regionMap := make(map[string]map[string]deviceplugin.DeviceInfo)
 
 	for _, dev := range devices {
@@ -77,6 +79,30 @@ func getRegionMap(devices []device) map[string]map[string]deviceplugin.DeviceInf
 	return regionMap
 }
 
+// getRegionMap returns mapping of region interface IDs to AF ports only
+func getRegionMap(devices []device) map[string]map[string]deviceplugin.DeviceInfo {
+	regionMap := make(map[string]map[string]deviceplugin.DeviceInfo)
+
+	for _, dev := range devices {
+		for _, region := range dev.regions {
+			if _, present := regionMap[region.interfaceID]; !present {
+				regionMap[region.interfaceID] = make(map[string]deviceplugin.DeviceInfo)
+			}
+			devNodes := make([]string, len(region.afus))
+			for num, afu := range region.afus {
+				devNodes[num] = afu.devNode
+			}
+			regionMap[region.interfaceID][region.id] = deviceplugin.DeviceInfo{
+				State: pluginapi.Healthy,
+				Nodes: devNodes,
+			}
+		}
+	}
+
+	return regionMap
+}
+
+// getAfuMap returns mapping of AFU IDs to AF ports
 func getAfuMap(devices []device) map[string]map[string]deviceplugin.DeviceInfo {
 	afuMap := make(map[string]map[string]deviceplugin.DeviceInfo)
 
@@ -138,6 +164,8 @@ func NewCache(sysfsDir string, devfsDir string, mode string, ch chan<- UpdateInf
 		getDevMap = getAfuMap
 	case RegionMode:
 		getDevMap = getRegionMap
+	case RegionDevelMode:
+		getDevMap = getRegionDevelMap
 	default:
 		return nil, fmt.Errorf("Wrong mode: '%s'", mode)
 	}

cmd/fpga_plugin/devicecache/devicecache_test.go

@@ -65,6 +65,9 @@ func TestNewCache(t *testing.T) {
 		{
 			mode: RegionMode,
 		},
+		{
+			mode: RegionDevelMode,
+		},
 		{
 			mode:        "unparsable",
 			expectedErr: true,
@@ -119,7 +122,7 @@ func getDevices() []device {
 	}
 }
 
-func TestGetRegionMap(t *testing.T) {
+func TestGetRegionDevelMap(t *testing.T) {
 	expected := map[string]map[string]deviceplugin.DeviceInfo{
 		"ce48969398f05f33946d560708be108a": {
 			"intel-fpga-fme.0": {
@@ -133,6 +136,26 @@ func TestGetRegionMap(t *testing.T) {
 		},
 	}
 
+	result := getRegionDevelMap(getDevices())
+	if !reflect.DeepEqual(result, expected) {
+		t.Error("Got unexpected result: ", result)
+	}
+}
+
+func TestGetRegionMap(t *testing.T) {
+	expected := map[string]map[string]deviceplugin.DeviceInfo{
+		"ce48969398f05f33946d560708be108a": {
+			"intel-fpga-fme.0": {
+				State: pluginapi.Healthy,
+				Nodes: []string{"/dev/intel-fpga-port.0"},
+			},
+			"intel-fpga-fme.1": {
+				State: pluginapi.Healthy,
+				Nodes: []string{"/dev/intel-fpga-port.1"},
+			},
+		},
+	}
+
 	result := getRegionMap(getDevices())
 	if !reflect.DeepEqual(result, expected) {
 		t.Error("Got unexpected result: ", result)

cmd/fpga_plugin/fpga_plugin.go

@@ -119,7 +119,8 @@ func handleUpdate(dms map[string]*deviceManager, updateInfo devicecache.UpdateIn
 func main() {
 	var mode string
 
-	flag.StringVar(&mode, "mode", string(devicecache.AfMode), fmt.Sprintf("device plugin mode: '%s' (default) or '%s'", devicecache.AfMode, devicecache.RegionMode))
+	flag.StringVar(&mode, "mode", string(devicecache.AfMode),
+		fmt.Sprintf("device plugin mode: '%s' (default), '%s' or '%s'", devicecache.AfMode, devicecache.RegionMode, devicecache.RegionDevelMode))
 	flag.Parse()
 
 	updatesCh := make(chan devicecache.UpdateInfo)