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userspace: Support VXLAN and GENEVE TSO.

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For userspace datapath, this patch provides vxlan and geneve tunnel tso.
Only support userspace vxlan or geneve tunnel, meanwhile support
tunnel outter and inner csum offload. If netdev do not support offload
features, there is a software fallback.If netdev do not support vxlan
and geneve tso,packets will drop. Front-end devices can close offload
features by ethtool also.

Acked-by: Simon Horman <horms@ovn.org>
Signed-off-by: Dexia Li <dexia.li@jaguarmicro.com>
Co-authored-by: Mike Pattrick <mkp@redhat.com>
Signed-off-by: Mike Pattrick <mkp@redhat.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
This commit is contained in:
Dexia Li
2024-01-17 14:26:30 -05:00
committed by Ilya Maximets
parent 0edfe05e42
commit 084c808729
12 changed files with 461 additions and 54 deletions
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86
lib/netdev-dpdk.c
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@@ -416,6 +416,10 @@ enum dpdk_hw_ol_features {
NETDEV_TX_UDP_CKSUM_OFFLOAD = 1 << 5,
NETDEV_TX_SCTP_CKSUM_OFFLOAD = 1 << 6,
NETDEV_TX_TSO_OFFLOAD = 1 << 7,
NETDEV_TX_VXLAN_TNL_TSO_OFFLOAD = 1 << 8,
NETDEV_TX_GENEVE_TNL_TSO_OFFLOAD = 1 << 9,
NETDEV_TX_OUTER_IP_CKSUM_OFFLOAD = 1 << 10,
NETDEV_TX_OUTER_UDP_CKSUM_OFFLOAD = 1 << 11,
};
enum dpdk_rx_steer_flags {
@@ -1075,6 +1079,14 @@ netdev_dpdk_update_netdev_flags(struct netdev_dpdk *dev)
NETDEV_TX_OFFLOAD_SCTP_CKSUM);
netdev_dpdk_update_netdev_flag(dev, NETDEV_TX_TSO_OFFLOAD,
NETDEV_TX_OFFLOAD_TCP_TSO);
netdev_dpdk_update_netdev_flag(dev, NETDEV_TX_VXLAN_TNL_TSO_OFFLOAD,
NETDEV_TX_VXLAN_TNL_TSO);
netdev_dpdk_update_netdev_flag(dev, NETDEV_TX_GENEVE_TNL_TSO_OFFLOAD,
NETDEV_TX_GENEVE_TNL_TSO);
netdev_dpdk_update_netdev_flag(dev, NETDEV_TX_OUTER_IP_CKSUM_OFFLOAD,
NETDEV_TX_OFFLOAD_OUTER_IP_CKSUM);
netdev_dpdk_update_netdev_flag(dev, NETDEV_TX_OUTER_UDP_CKSUM_OFFLOAD,
NETDEV_TX_OFFLOAD_OUTER_UDP_CKSUM);
}
static int
@@ -1129,6 +1141,22 @@ dpdk_eth_dev_port_config(struct netdev_dpdk *dev, int n_rxq, int n_txq)
conf.txmode.offloads |= RTE_ETH_TX_OFFLOAD_TCP_TSO;
}
if (dev->hw_ol_features & NETDEV_TX_VXLAN_TNL_TSO_OFFLOAD) {
conf.txmode.offloads |= RTE_ETH_TX_OFFLOAD_VXLAN_TNL_TSO;
}
if (dev->hw_ol_features & NETDEV_TX_GENEVE_TNL_TSO_OFFLOAD) {
conf.txmode.offloads |= RTE_ETH_TX_OFFLOAD_GENEVE_TNL_TSO;
}
if (dev->hw_ol_features & NETDEV_TX_OUTER_IP_CKSUM_OFFLOAD) {
conf.txmode.offloads |= RTE_ETH_TX_OFFLOAD_OUTER_IPV4_CKSUM;
}
if (dev->hw_ol_features & NETDEV_TX_OUTER_UDP_CKSUM_OFFLOAD) {
conf.txmode.offloads |= RTE_ETH_TX_OFFLOAD_OUTER_UDP_CKSUM;
}
/* Limit configured rss hash functions to only those supported
* by the eth device. */
conf.rx_adv_conf.rss_conf.rss_hf &= info.flow_type_rss_offloads;
@@ -1346,6 +1374,18 @@ dpdk_eth_dev_init(struct netdev_dpdk *dev)
dev->hw_ol_features &= ~NETDEV_TX_SCTP_CKSUM_OFFLOAD;
}
if (info.tx_offload_capa & RTE_ETH_TX_OFFLOAD_OUTER_IPV4_CKSUM) {
dev->hw_ol_features |= NETDEV_TX_OUTER_IP_CKSUM_OFFLOAD;
} else {
dev->hw_ol_features &= ~NETDEV_TX_OUTER_IP_CKSUM_OFFLOAD;
}
if (info.tx_offload_capa & RTE_ETH_TX_OFFLOAD_OUTER_UDP_CKSUM) {
dev->hw_ol_features |= NETDEV_TX_OUTER_UDP_CKSUM_OFFLOAD;
} else {
dev->hw_ol_features &= ~NETDEV_TX_OUTER_UDP_CKSUM_OFFLOAD;
}
dev->hw_ol_features &= ~NETDEV_TX_TSO_OFFLOAD;
if (userspace_tso_enabled()) {
if (info.tx_offload_capa & RTE_ETH_TX_OFFLOAD_TCP_TSO) {
@@ -1354,6 +1394,20 @@ dpdk_eth_dev_init(struct netdev_dpdk *dev)
VLOG_WARN("%s: Tx TSO offload is not supported.",
netdev_get_name(&dev->up));
}
if (info.tx_offload_capa & RTE_ETH_TX_OFFLOAD_VXLAN_TNL_TSO) {
dev->hw_ol_features |= NETDEV_TX_VXLAN_TNL_TSO_OFFLOAD;
} else {
VLOG_WARN("%s: Tx Vxlan tunnel TSO offload is not supported.",
netdev_get_name(&dev->up));
}
if (info.tx_offload_capa & RTE_ETH_TX_OFFLOAD_GENEVE_TNL_TSO) {
dev->hw_ol_features |= NETDEV_TX_GENEVE_TNL_TSO_OFFLOAD;
} else {
VLOG_WARN("%s: Tx Geneve tunnel TSO offload is not supported.",
netdev_get_name(&dev->up));
}
}
n_rxq = MIN(info.max_rx_queues, dev->up.n_rxq);
@@ -2479,11 +2533,23 @@ netdev_dpdk_prep_hwol_packet(struct netdev_dpdk *dev, struct rte_mbuf *mbuf)
return true;
}
mbuf->l2_len = (char *) dp_packet_l3(pkt) - (char *) dp_packet_eth(pkt);
mbuf->l3_len = (char *) dp_packet_l4(pkt) - (char *) dp_packet_l3(pkt);
mbuf->l4_len = 0;
mbuf->outer_l2_len = 0;
mbuf->outer_l3_len = 0;
/* If packet is vxlan or geneve tunnel packet, calculate outer
* l2 len and outer l3 len. Inner l2/l3/l4 len are calculated
* before. */
if (mbuf->ol_flags &
(RTE_MBUF_F_TX_TUNNEL_GENEVE | RTE_MBUF_F_TX_TUNNEL_VXLAN)) {
mbuf->outer_l2_len = (char *) dp_packet_l3(pkt) -
(char *) dp_packet_eth(pkt);
mbuf->outer_l3_len = (char *) dp_packet_l4(pkt) -
(char *) dp_packet_l3(pkt);
} else {
mbuf->l2_len = (char *) dp_packet_l3(pkt) -
(char *) dp_packet_eth(pkt);
mbuf->l3_len = (char *) dp_packet_l4(pkt) -
(char *) dp_packet_l3(pkt);
mbuf->outer_l2_len = 0;
mbuf->outer_l3_len = 0;
}
th = dp_packet_l4(pkt);
if (mbuf->ol_flags & RTE_MBUF_F_TX_TCP_SEG) {
@@ -2501,8 +2567,14 @@ netdev_dpdk_prep_hwol_packet(struct netdev_dpdk *dev, struct rte_mbuf *mbuf)
return false;
}
mbuf->l4_len = TCP_OFFSET(th->tcp_ctl) * 4;
mbuf->tso_segsz = dev->mtu - mbuf->l3_len - mbuf->l4_len;
if (mbuf->ol_flags & (RTE_MBUF_F_TX_TUNNEL_GENEVE |
RTE_MBUF_F_TX_TUNNEL_VXLAN)) {
mbuf->tso_segsz = dev->mtu - mbuf->l2_len - mbuf->l3_len -
mbuf->l4_len - mbuf->outer_l3_len;
} else {
mbuf->l4_len = TCP_OFFSET(th->tcp_ctl) * 4;
mbuf->tso_segsz = dev->mtu - mbuf->l3_len - mbuf->l4_len;
}
if (mbuf->ol_flags & RTE_MBUF_F_TX_TCP_SEG) {
int hdr_len = mbuf->l2_len + mbuf->l3_len + mbuf->l4_len;