dpdk: mask and warn if rx/tx offload is not available

Warning messsage is displayed in system log:
vpp# show log
1970/ 1/ 1 01:00:01:198 warn       dpdk       unsupported rx offloads requested on port 0: scatter

Change-Id: I40021066daf2d37ca5233e3adce55e412f0d3932
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/src/plugins/dpdk/device/common.c b/src/plugins/dpdk/device/common.c
index af1108f3d1e..c64f1d0246b 100644
--- a/src/plugins/dpdk/device/common.c
+++ b/src/plugins/dpdk/device/common.c
@@ -43,6 +43,8 @@ dpdk_device_setup (dpdk_device_t * xd)
   vnet_main_t *vnm = vnet_get_main ();
   vnet_sw_interface_t *sw = vnet_get_sw_interface (vnm, xd->sw_if_index);
   vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, xd->hw_if_index);
+  struct rte_eth_dev_info dev_info;
+  u64 bitmap;
   int rv;
   int j;
 
@@ -66,6 +68,24 @@ dpdk_device_setup (dpdk_device_t * xd)
 	xd->port_conf.fdir_conf.mode = RTE_FDIR_MODE_NONE;
     }
 
+  rte_eth_dev_info_get (xd->port_id, &dev_info);
+
+  bitmap = xd->port_conf.txmode.offloads & ~dev_info.tx_offload_capa;
+  if (bitmap)
+    {
+      dpdk_log_warn ("unsupported tx offloads requested on port %u: %U",
+		     xd->port_id, format_dpdk_tx_offload_caps, bitmap);
+      xd->port_conf.txmode.offloads ^= bitmap;
+    }
+
+  bitmap = xd->port_conf.rxmode.offloads & ~dev_info.rx_offload_capa;
+  if (bitmap)
+    {
+      dpdk_log_warn ("unsupported rx offloads requested on port %u: %U",
+		     xd->port_id, format_dpdk_rx_offload_caps, bitmap);
+      xd->port_conf.rxmode.offloads ^= bitmap;
+    }
+
   rv = rte_eth_dev_configure (xd->port_id, xd->rx_q_used,
 			      xd->tx_q_used, &xd->port_conf);