From: Steven Luong <sluong@cisco.com>
Date: Thu, 13 Feb 2020 02:45:09 +0000 (-0800)
Subject: dpdk: TSO does not work for Cisco VIC
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=6f171a77564981aa65148df03ba17cd94d663009;p=vpp.git

dpdk: TSO does not work for Cisco VIC

While TSO is supported for Intel NIC, Cisco VIC does not work.
The problem is due to txmode offloads is not properly set for
the Cisco VIC when enable-tcp-udp-checksum is configured.

Type: fix
Ticket: VPP-1838

Signed-off-by: Steven Luong <sluong@cisco.com>
Change-Id: I72c41db9b327ed8d08ef70d74e8cc6206d4a102f
(cherry picked from commit ac8bb9263438221cc93db62257ffd8db711530e2)
---

diff --git a/src/plugins/dpdk/device/init.c b/src/plugins/dpdk/device/init.c
index d0125e93936..34a1a82ef3c 100644
--- a/src/plugins/dpdk/device/init.c
+++ b/src/plugins/dpdk/device/init.c
@@ -199,6 +199,15 @@ check_l3cache ()
   return 0;
 }
 
+static void
+dpdk_enable_l4_csum_offload (dpdk_device_t * xd)
+{
+  xd->port_conf.txmode.offloads |= DEV_TX_OFFLOAD_TCP_CKSUM;
+  xd->port_conf.txmode.offloads |= DEV_TX_OFFLOAD_UDP_CKSUM;
+  xd->flags |= DPDK_DEVICE_FLAG_TX_OFFLOAD |
+    DPDK_DEVICE_FLAG_INTEL_PHDR_CKSUM;
+}
+
 static clib_error_t *
 dpdk_lib_init (dpdk_main_t * dm)
 {
@@ -496,6 +505,8 @@ dpdk_lib_init (dpdk_main_t * dm)
 	      /* Cisco VIC */
 	    case VNET_DPDK_PMD_ENIC:
 	      xd->port_type = port_type_from_link_speed (l.link_speed);
+	      if (dm->conf->enable_tcp_udp_checksum)
+		dpdk_enable_l4_csum_offload (xd);
 	      break;
 
 	      /* Intel Red Rock Canyon */