Added P4Runtime-based Barefoot Tofino driver
Change-Id: I09ba8dd4468fa5a792ca481921e8a51dad49702e
diff --git a/drivers/barefoot/src/main/java/org/onosproject/drivers/barefoot/BarefootDriversLoader.java b/drivers/barefoot/src/main/java/org/onosproject/drivers/barefoot/BarefootDriversLoader.java
new file mode 100644
index 0000000..41ab063
--- /dev/null
+++ b/drivers/barefoot/src/main/java/org/onosproject/drivers/barefoot/BarefootDriversLoader.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * 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 org.onosproject.drivers.barefoot;
+
+import org.apache.felix.scr.annotations.Component;
+import org.onosproject.net.driver.AbstractDriverLoader;
+
+/**
+ * Loader for the Barefoot device drivers.
+ */
+@Component(immediate = true)
+public class BarefootDriversLoader extends AbstractDriverLoader {
+
+ public BarefootDriversLoader() {
+ super("/barefoot-drivers.xml");
+ }
+}
diff --git a/drivers/barefoot/src/main/java/org/onosproject/drivers/barefoot/TofinoPipelineProgrammable.java b/drivers/barefoot/src/main/java/org/onosproject/drivers/barefoot/TofinoPipelineProgrammable.java
new file mode 100644
index 0000000..197b681
--- /dev/null
+++ b/drivers/barefoot/src/main/java/org/onosproject/drivers/barefoot/TofinoPipelineProgrammable.java
@@ -0,0 +1,97 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * 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 org.onosproject.drivers.barefoot;
+
+import com.google.common.collect.Lists;
+import org.apache.commons.io.IOUtils;
+import org.onosproject.drivers.p4runtime.AbstractP4RuntimePipelineProgrammable;
+import org.onosproject.net.pi.model.PiPipeconf;
+import org.onosproject.net.pi.model.PiPipeconf.ExtensionType;
+
+import java.io.IOException;
+import java.nio.Buffer;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.charset.StandardCharsets;
+import java.util.List;
+import java.util.Optional;
+
+import static org.onosproject.net.pi.model.PiPipeconf.ExtensionType.TOFINO_BIN;
+import static org.onosproject.net.pi.model.PiPipeconf.ExtensionType.TOFINO_CONTEXT_JSON;
+
+/**
+ * Implementation of the PiPipelineProgrammable behaviour for a Tofino-based switch.
+ */
+public class TofinoPipelineProgrammable extends AbstractP4RuntimePipelineProgrammable {
+
+ @Override
+ public Optional<PiPipeconf> getDefaultPipeconf() {
+ return Optional.empty();
+ }
+
+ @Override
+ public ByteBuffer createDeviceDataBuffer(PiPipeconf pipeconf) {
+
+ List<ByteBuffer> buffers = Lists.newLinkedList();
+ try {
+ buffers.add(nameBuffer(pipeconf));
+ buffers.add(extensionBuffer(pipeconf, TOFINO_BIN));
+ buffers.add(extensionBuffer(pipeconf, TOFINO_CONTEXT_JSON));
+ } catch (ExtensionException e) {
+ return null;
+ }
+
+ // Concatenate buffers (flip so they can be read).
+ int len = buffers.stream().mapToInt(Buffer::limit).sum();
+ ByteBuffer deviceData = ByteBuffer.allocate(len);
+ buffers.forEach(b -> deviceData.put((ByteBuffer) b.flip()));
+ deviceData.flip();
+
+ return deviceData.asReadOnlyBuffer();
+ }
+
+ private ByteBuffer nameBuffer(PiPipeconf pipeconf) {
+ // Length of the name + name.
+ String name = pipeconf.id().toString();
+ return ByteBuffer.allocate(Integer.BYTES + name.length())
+ .order(ByteOrder.LITTLE_ENDIAN)
+ .putInt(name.length())
+ .put(name.getBytes(StandardCharsets.UTF_8));
+ }
+
+ private ByteBuffer extensionBuffer(PiPipeconf pipeconf, ExtensionType extType) {
+ if (!pipeconf.extension(extType).isPresent()) {
+ log.warn("Missing extension {} in pipeconf {}", extType, pipeconf.id());
+ throw new ExtensionException();
+ }
+ try {
+ byte[] bytes = IOUtils.toByteArray(pipeconf.extension(extType).get());
+ // Length of the extension + bytes.
+ return ByteBuffer.allocate(Integer.BYTES + bytes.length)
+ .order(ByteOrder.LITTLE_ENDIAN)
+ .putInt(bytes.length)
+ .put(bytes);
+ } catch (IOException ex) {
+ log.warn("Unable to read extension {} from pipeconf {}: {}",
+ extType, pipeconf.id(), ex.getMessage());
+ throw new ExtensionException();
+ }
+ }
+
+ private static class ExtensionException extends IllegalArgumentException {
+ }
+}
diff --git a/drivers/barefoot/src/main/java/org/onosproject/drivers/barefoot/package-info.java b/drivers/barefoot/src/main/java/org/onosproject/drivers/barefoot/package-info.java
new file mode 100644
index 0000000..649731e
--- /dev/null
+++ b/drivers/barefoot/src/main/java/org/onosproject/drivers/barefoot/package-info.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * 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 for Barefoot device drivers.
+ */
+package org.onosproject.drivers.barefoot;
\ No newline at end of file
diff --git a/drivers/barefoot/src/main/resources/barefoot-drivers.xml b/drivers/barefoot/src/main/resources/barefoot-drivers.xml
new file mode 100644
index 0000000..ee56455
--- /dev/null
+++ b/drivers/barefoot/src/main/resources/barefoot-drivers.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ ~ Copyright 2017-present Open Networking Laboratory
+ ~
+ ~ 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.
+ -->
+<drivers>
+ <driver name="tofino" manufacturer="Barefoot Networks" hwVersion="1.0" swVersion="1.0" extends="p4runtime">
+ <behaviour api="org.onosproject.net.pi.model.PiPipelineProgrammable"
+ impl="org.onosproject.drivers.barefoot.TofinoPipelineProgrammable"/>
+ </driver>
+</drivers>
+