net/virtio-user: add parameter to enable vectorized path

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

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

diff --git a/doc/guides/nics/virtio.rst b/doc/guides/nics/virtio.rst
index aaa8176..2f91d47 100644 (file)
--- 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 prefers 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 150a8d9..40ad786 100644 (file)
--- 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>");