net/vmxnet3: enable LRO

This change enables device LRO if requested.

The current implementation of jumbo frame Rx can be used for LRO
directly without changes.

Note that since jumbo frame uses both ring0 and ring1, it cannot
be enabled in UPT (VMDirectPath) mode.

Signed-off-by: Yong Wang <yongwang@vmware.com>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>

diff --git a/doc/guides/nics/features/vmxnet3.ini b/doc/guides/nics/features/vmxnet3.ini
index c5c75ad9279141c90404fe2830672586965b713d..ef95932ab54cc6a5d9f8b148515c8a21b8a1f840 100644 (file)
--- a/doc/guides/nics/features/vmxnet3.ini
+++ b/doc/guides/nics/features/vmxnet3.ini
@@ -9,6 +9,7 @@ Link status event    = Y
 Queue start/stop     = Y
 MTU update           = Y
 Jumbo frame          = Y
+LRO                  = Y
 TSO                  = Y
 Promiscuous mode     = Y
 Allmulticast mode    = Y

diff --git a/drivers/net/vmxnet3/vmxnet3_ethdev.c b/drivers/net/vmxnet3/vmxnet3_ethdev.c
index 3a4c777d1e2109548c4224619b5af61ab9e46442..51e2d4cf80c96ae62b791457b8090f55ff746001 100644 (file)
--- a/drivers/net/vmxnet3/vmxnet3_ethdev.c
+++ b/drivers/net/vmxnet3/vmxnet3_ethdev.c
@@ -527,6 +527,11 @@ vmxnet3_setup_driver_shared(struct rte_eth_dev *dev)
        if (dev->data->dev_conf.rxmode.hw_ip_checksum)
                devRead->misc.uptFeatures |= VMXNET3_F_RXCSUM;
 
+       if (dev->data->dev_conf.rxmode.enable_lro) {
+               devRead->misc.uptFeatures |= VMXNET3_F_LRO;
+               devRead->misc.maxNumRxSG = 0;
+       }
+
        if (port_conf.rxmode.mq_mode == ETH_MQ_RX_RSS) {
                ret = vmxnet3_rss_configure(dev);
                if (ret != VMXNET3_SUCCESS)
@@ -728,7 +733,8 @@ vmxnet3_dev_info_get(__rte_unused struct rte_eth_dev *dev,
        dev_info->rx_offload_capa =
                DEV_RX_OFFLOAD_VLAN_STRIP |
                DEV_RX_OFFLOAD_UDP_CKSUM |
-               DEV_RX_OFFLOAD_TCP_CKSUM;
+               DEV_RX_OFFLOAD_TCP_CKSUM |
+               DEV_RX_OFFLOAD_TCP_LRO;
 
        dev_info->tx_offload_capa =
                DEV_TX_OFFLOAD_VLAN_INSERT |