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authorDave Barach <dave@barachs.net>2017-06-29 09:30:15 -0400
committerFlorin Coras <florin.coras@gmail.com>2017-07-18 17:05:01 +0000
commit2c0a4f407f565d8dd33ff3a9fada346860d30ad2 (patch)
treefeef8e57bc4f7b434715bd04c9be218ce215bdd0 /src/plugins/dpdk
parent758137a7b70806dc9ec7a28fbe1bc01bc7df2586 (diff)
TCP/UDP checksum offload API
Change-Id: I2cb6ce4e29813f6602b14e6e61713fb381fbcef8 Signed-off-by: Dave Barach <dave@barachs.net>
Diffstat (limited to 'src/plugins/dpdk')
-rw-r--r--src/plugins/dpdk/device/device.c41
-rw-r--r--src/plugins/dpdk/device/dpdk.h3
-rwxr-xr-xsrc/plugins/dpdk/device/init.c8
3 files changed, 52 insertions, 0 deletions
diff --git a/src/plugins/dpdk/device/device.c b/src/plugins/dpdk/device/device.c
index 8801bfd3a25..c755060d658 100644
--- a/src/plugins/dpdk/device/device.c
+++ b/src/plugins/dpdk/device/device.c
@@ -335,6 +335,37 @@ dpdk_buffer_recycle (vlib_main_t * vm, vlib_node_runtime_t * node,
vec_add1 (dm->recycle[my_cpu], bi);
}
+static_always_inline void
+dpdk_buffer_tx_offload (dpdk_device_t * xd, vlib_buffer_t * b,
+ struct rte_mbuf *mb)
+{
+ u32 ip_cksum = b->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM;
+ u32 tcp_cksum = b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
+ u32 udp_cksum = b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
+ int is_ip4 = b->flags & VNET_BUFFER_F_IS_IP4;
+ u64 ol_flags;
+
+ /* Is there any work for us? */
+ if (PREDICT_TRUE ((ip_cksum | tcp_cksum | udp_cksum) == 0))
+ return;
+
+ mb->l2_len = vnet_buffer (b)->l3_hdr_offset - b->current_data;
+ mb->l3_len = vnet_buffer (b)->l4_hdr_offset -
+ vnet_buffer (b)->l3_hdr_offset;
+ mb->outer_l3_len = 0;
+ mb->outer_l2_len = 0;
+ ol_flags = is_ip4 ? PKT_TX_IPV4 : PKT_TX_IPV6;
+ ol_flags |= ip_cksum ? PKT_TX_IP_CKSUM : 0;
+ ol_flags |= tcp_cksum ? PKT_TX_TCP_CKSUM : 0;
+ ol_flags |= udp_cksum ? PKT_TX_UDP_CKSUM : 0;
+ mb->ol_flags |= ol_flags;
+
+ /* we are trying to help compiler here by using local ol_flags with known
+ state of all flags */
+ if (xd->flags & DPDK_DEVICE_FLAG_INTEL_PHDR_CKSUM)
+ rte_net_intel_cksum_flags_prepare (mb, ol_flags);
+}
+
/*
* Transmits the packets on the frame to the interface associated with the
* node. It first copies packets on the frame to a tx_vector containing the
@@ -455,6 +486,15 @@ dpdk_interface_tx (vlib_main_t * vm,
mb2 = rte_mbuf_from_vlib_buffer (b2);
mb3 = rte_mbuf_from_vlib_buffer (b3);
+ if (PREDICT_FALSE ((xd->flags & DPDK_DEVICE_FLAG_TX_OFFLOAD) &&
+ (or_flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)))
+ {
+ dpdk_buffer_tx_offload (xd, b0, mb0);
+ dpdk_buffer_tx_offload (xd, b1, mb1);
+ dpdk_buffer_tx_offload (xd, b2, mb2);
+ dpdk_buffer_tx_offload (xd, b3, mb3);
+ }
+
if (PREDICT_FALSE (or_flags & VLIB_BUFFER_RECYCLE))
{
dpdk_buffer_recycle (vm, node, b0, bi0, &mb0);
@@ -521,6 +561,7 @@ dpdk_interface_tx (vlib_main_t * vm,
dpdk_validate_rte_mbuf (vm, b0, 1);
mb0 = rte_mbuf_from_vlib_buffer (b0);
+ dpdk_buffer_tx_offload (xd, b0, mb0);
dpdk_buffer_recycle (vm, node, b0, bi0, &mb0);
if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE))
diff --git a/src/plugins/dpdk/device/dpdk.h b/src/plugins/dpdk/device/dpdk.h
index 55f63b37307..29a2c760e8d 100644
--- a/src/plugins/dpdk/device/dpdk.h
+++ b/src/plugins/dpdk/device/dpdk.h
@@ -38,6 +38,7 @@
#include <rte_version.h>
#include <rte_eth_bond.h>
#include <rte_sched.h>
+#include <rte_net.h>
#include <vnet/unix/pcap.h>
#include <vnet/devices/devices.h>
@@ -176,6 +177,8 @@ typedef struct
#define DPDK_DEVICE_FLAG_HQOS (1 << 6)
#define DPDK_DEVICE_FLAG_BOND_SLAVE (1 << 7)
#define DPDK_DEVICE_FLAG_BOND_SLAVE_UP (1 << 8)
+#define DPDK_DEVICE_FLAG_TX_OFFLOAD (1 << 9)
+#define DPDK_DEVICE_FLAG_INTEL_PHDR_CKSUM (1 << 10)
u16 nb_tx_desc;
CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
diff --git a/src/plugins/dpdk/device/init.c b/src/plugins/dpdk/device/init.c
index 7ca3d358403..8a7080352e7 100755
--- a/src/plugins/dpdk/device/init.c
+++ b/src/plugins/dpdk/device/init.c
@@ -351,6 +351,11 @@ dpdk_lib_init (dpdk_main_t * dm)
case VNET_DPDK_PMD_IGB:
case VNET_DPDK_PMD_IXGBE:
case VNET_DPDK_PMD_I40E:
+ xd->port_type = port_type_from_speed_capa (&dev_info);
+ xd->flags |= DPDK_DEVICE_FLAG_TX_OFFLOAD |
+ DPDK_DEVICE_FLAG_INTEL_PHDR_CKSUM;
+
+ break;
case VNET_DPDK_PMD_CXGBE:
case VNET_DPDK_PMD_MLX4:
case VNET_DPDK_PMD_MLX5:
@@ -575,6 +580,9 @@ dpdk_lib_init (dpdk_main_t * dm)
hi = vnet_get_hw_interface (dm->vnet_main, xd->hw_if_index);
+ if (xd->flags & DPDK_DEVICE_FLAG_TX_OFFLOAD)
+ hi->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD;
+
dpdk_device_setup (xd);
if (vec_len (xd->errors))