[dpdk-dev] [PATCH v12 4/9] net/virtio-user: add vectorized devarg

[Marvin Liu]

Add new devarg for virtio user device vectorized path selection. By
default vectorized path is disabled.

Signed-off-by: Marvin Liu <yong.liu at intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin at redhat.com>

diff --git a/doc/guides/nics/virtio.rst b/doc/guides/nics/virtio.rst
index a67774e91..fdd0790e0 100644
--- a/doc/guides/nics/virtio.rst
+++ b/doc/guides/nics/virtio.rst
@@ -424,6 +424,12 @@ Below devargs are supported by the virtio-user vdev:
     rte_eth_link_get_nowait function.
     (Default: 10000 (10G))
 
+#.  ``vectorized``:
+
+    It is used to specify whether virtio device perfers to use vectorized path.
+    Afterwards, dependencies of vectorized path will be checked in path
+    election.
+    (Default: 0 (disabled))
 
 Virtio paths Selection and Usage
 --------------------------------
diff --git a/drivers/net/virtio/virtio_user_ethdev.c b/drivers/net/virtio/virtio_user_ethdev.c
index 150a8d987..40ad786cc 100644
--- a/drivers/net/virtio/virtio_user_ethdev.c
+++ b/drivers/net/virtio/virtio_user_ethdev.c
@@ -452,6 +452,8 @@ static const char *valid_args[] = {
 	VIRTIO_USER_ARG_PACKED_VQ,
 #define VIRTIO_USER_ARG_SPEED          "speed"
 	VIRTIO_USER_ARG_SPEED,
+#define VIRTIO_USER_ARG_VECTORIZED     "vectorized"
+	VIRTIO_USER_ARG_VECTORIZED,
 	NULL
 };
 
@@ -559,6 +561,7 @@ virtio_user_pmd_probe(struct rte_vdev_device *dev)
 	uint64_t mrg_rxbuf = 1;
 	uint64_t in_order = 1;
 	uint64_t packed_vq = 0;
+	uint64_t vectorized = 0;
 	char *path = NULL;
 	char *ifname = NULL;
 	char *mac_addr = NULL;
@@ -675,6 +678,15 @@ virtio_user_pmd_probe(struct rte_vdev_device *dev)
 		}
 	}
 
+	if (rte_kvargs_count(kvlist, VIRTIO_USER_ARG_VECTORIZED) == 1) {
+		if (rte_kvargs_process(kvlist, VIRTIO_USER_ARG_VECTORIZED,
+				       &get_integer_arg, &vectorized) < 0) {
+			PMD_INIT_LOG(ERR, "error to parse %s",
+				     VIRTIO_USER_ARG_VECTORIZED);
+			goto end;
+		}
+	}
+
 	if (queues > 1 && cq == 0) {
 		PMD_INIT_LOG(ERR, "multi-q requires ctrl-q");
 		goto end;
@@ -727,6 +739,9 @@ virtio_user_pmd_probe(struct rte_vdev_device *dev)
 		goto end;
 	}
 
+	if (vectorized)
+		hw->use_vec_rx = 1;
+
 	rte_eth_dev_probing_finish(eth_dev);
 	ret = 0;
 
@@ -785,4 +800,5 @@ RTE_PMD_REGISTER_PARAM_STRING(net_virtio_user,
 	"mrg_rxbuf=<0|1> "
 	"in_order=<0|1> "
 	"packed_vq=<0|1> "
-	"speed=<int>");
+	"speed=<int> "
+	"vectorized=<0|1>");
-- 
2.17.1