raw/skeleton: add test cases

Patch introduces rawdev unit testcase for validation against the
Skeleton rawdev dummy PMD implementation.

Test cases are added along with the skeleton driver implementation.
It can be enabled by using vdev argument to any DPDK binary:

  --vdev="rawdev_skeleton,self_test=1"

In case 'self_test=1' is not provided, autotest doesn't execute the
test cases but the vdev is still available for application use.

Signed-off-by: Shreyansh Jain <shreyansh.jain@nxp.com>

drivers/raw/skeleton_rawdev/Makefile

@@ -24,5 +24,6 @@ LIBABIVER := 1
 # all source are stored in SRCS-y
 #
 SRCS-$(CONFIG_RTE_LIBRTE_PMD_SKELETON_RAWDEV) += skeleton_rawdev.c
+SRCS-$(CONFIG_RTE_LIBRTE_PMD_SKELETON_RAWDEV) += skeleton_rawdev_test.c
 
 include $(RTE_SDK)/mk/rte.lib.mk

drivers/raw/skeleton_rawdev/skeleton_rawdev.c

@@ -542,6 +542,8 @@ static const struct rte_rawdev_ops skeleton_rawdev_ops = {
 	.firmware_version_get = skeleton_rawdev_firmware_version_get,
 	.firmware_load = skeleton_rawdev_firmware_load,
 	.firmware_unload = skeleton_rawdev_firmware_unload,
+
+	.dev_selftest = test_rawdev_skeldev,
 };
 
 static int
@@ -631,11 +633,62 @@ skeleton_rawdev_destroy(const char *name)
 	return 0;
 }
 
+static int
+skeldev_get_selftest(const char *key __rte_unused,
+		     const char *value,
+		     void *opaque)
+{
+	int *flag = opaque;
+	*flag = atoi(value);
+	return 0;
+}
+
+static int
+skeldev_parse_vdev_args(struct rte_vdev_device *vdev)
+{
+	int selftest = 0;
+	const char *name;
+	const char *params;
+
+	static const char *const args[] = {
+		SKELETON_SELFTEST_ARG,
+		NULL
+	};
+
+	name = rte_vdev_device_name(vdev);
+
+	params = rte_vdev_device_args(vdev);
+	if (params != NULL && params[0] != '\0') {
+		struct rte_kvargs *kvlist = rte_kvargs_parse(params, args);
+
+		if (!kvlist) {
+			SKELETON_PMD_INFO(
+				"Ignoring unsupported params supplied '%s'",
+				name);
+		} else {
+			int ret = rte_kvargs_process(kvlist,
+					SKELETON_SELFTEST_ARG,
+					skeldev_get_selftest, &selftest);
+			if (ret != 0 || (selftest < 0 || selftest > 1)) {
+				SKELETON_PMD_ERR("%s: Error in parsing args",
+						 name);
+				rte_kvargs_free(kvlist);
+				ret = -1; /* enforce if selftest is invalid */
+				return ret;
+			}
+		}
+
+		rte_kvargs_free(kvlist);
+	}
+
+	return selftest;
+}
+
 static int
 skeleton_rawdev_probe(struct rte_vdev_device *vdev)
 {
 	const char *name;
-	int ret = 0;
+	int selftest = 0, ret = 0;
 
 
 	name = rte_vdev_device_name(vdev);
@@ -648,7 +701,18 @@ skeleton_rawdev_probe(struct rte_vdev_device *vdev)
 
 	SKELETON_PMD_INFO("Init %s on NUMA node %d", name, rte_socket_id());
 
+	selftest = skeldev_parse_vdev_args(vdev);
+	/* In case of invalid argument, selftest != 1; ignore other values */
+
 	ret = skeleton_rawdev_create(name, vdev, rte_socket_id());
+	if (!ret) {
+		/* In case command line argument for 'selftest' was passed;
+		 * if invalid arguments were passed, execution continues but
+		 * without selftest.
+		 */
+		if (selftest == 1)
+			test_rawdev_skeldev();
+	}
 
 	/* Device instance created; Second instance not possible */
 	skeldev_init_once = 1;