From 77b8301733c3cd946648ca4a1375e3db0a952216 Mon Sep 17 00:00:00 2001 From: Jijiang Liu Date: Thu, 23 Oct 2014 21:18:59 +0800 Subject: [PATCH] i40e: VXLAN Tx checksum offload Support VxLAN Tx checksum offload, which include - outer L3(IP) checksum offload - inner L3(IP) checksum offload - inner L4(UDP, TCP and SCTP) checksum offload Signed-off-by: Jijiang Liu Acked-by: Helin Zhang Tested-by: Yong Liu --- lib/librte_mbuf/rte_mbuf.h | 1 + lib/librte_pmd_i40e/i40e_rxtx.c | 46 ++++++++++++++++++++++++++++----- 2 files changed, 41 insertions(+), 6 deletions(-) diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h index 9af3bd9f02..a86dedf93a 100644 --- a/lib/librte_mbuf/rte_mbuf.h +++ b/lib/librte_mbuf/rte_mbuf.h @@ -96,6 +96,7 @@ extern "C" { #define PKT_TX_VLAN_PKT (1ULL << 55) /**< TX packet is a 802.1q VLAN packet. */ #define PKT_TX_IP_CKSUM (1ULL << 54) /**< IP cksum of TX pkt. computed by NIC. */ +#define PKT_TX_VXLAN_CKSUM (1ULL << 50) /**< TX checksum of VxLAN computed by NIC */ #define PKT_TX_IPV4_CSUM PKT_TX_IP_CKSUM /**< Alias of PKT_TX_IP_CKSUM. */ #define PKT_TX_IPV4 PKT_RX_IPV4_HDR /**< IPv4 with no IP checksum offload. */ #define PKT_TX_IPV6 PKT_RX_IPV6_HDR /**< IPv6 packet */ diff --git a/lib/librte_pmd_i40e/i40e_rxtx.c b/lib/librte_pmd_i40e/i40e_rxtx.c index 2108290f2b..7599df9698 100644 --- a/lib/librte_pmd_i40e/i40e_rxtx.c +++ b/lib/librte_pmd_i40e/i40e_rxtx.c @@ -411,11 +411,14 @@ i40e_rxd_ptype_to_pkt_flags(uint64_t qword) } static inline void -i40e_txd_enable_checksum(uint32_t ol_flags, +i40e_txd_enable_checksum(uint64_t ol_flags, uint32_t *td_cmd, uint32_t *td_offset, uint8_t l2_len, - uint8_t l3_len) + uint16_t l3_len, + uint8_t inner_l2_len, + uint16_t inner_l3_len, + uint32_t *cd_tunneling) { if (!l2_len) { PMD_DRV_LOG(DEBUG, "L2 length set to 0"); @@ -428,6 +431,27 @@ i40e_txd_enable_checksum(uint32_t ol_flags, return; } + /* VxLAN packet TX checksum offload */ + if (unlikely(ol_flags & PKT_TX_VXLAN_CKSUM)) { + uint8_t l4tun_len; + + l4tun_len = ETHER_VXLAN_HLEN + inner_l2_len; + + if (ol_flags & PKT_TX_IPV4_CSUM) + *cd_tunneling |= I40E_TX_CTX_EXT_IP_IPV4; + else if (ol_flags & PKT_TX_IPV6) + *cd_tunneling |= I40E_TX_CTX_EXT_IP_IPV6; + + /* Now set the ctx descriptor fields */ + *cd_tunneling |= (l3_len >> 2) << + I40E_TXD_CTX_QW0_EXT_IPLEN_SHIFT | + I40E_TXD_CTX_UDP_TUNNELING | + (l4tun_len >> 1) << + I40E_TXD_CTX_QW0_NATLEN_SHIFT; + + l3_len = inner_l3_len; + } + /* Enable L3 checksum offloads */ if (ol_flags & PKT_TX_IPV4_CSUM) { *td_cmd |= I40E_TX_DESC_CMD_IIPT_IPV4_CSUM; @@ -1077,7 +1101,10 @@ i40e_recv_scattered_pkts(void *rx_queue, static inline uint16_t i40e_calc_context_desc(uint64_t flags) { - uint16_t mask = 0; + uint64_t mask = 0ULL; + + if (flags | PKT_TX_VXLAN_CKSUM) + mask |= PKT_TX_VXLAN_CKSUM; #ifdef RTE_LIBRTE_IEEE1588 mask |= PKT_TX_IEEE1588_TMST; @@ -1098,6 +1125,7 @@ i40e_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts) volatile struct i40e_tx_desc *txr; struct rte_mbuf *tx_pkt; struct rte_mbuf *m_seg; + uint32_t cd_tunneling_params; uint16_t tx_id; uint16_t nb_tx; uint32_t td_cmd; @@ -1106,7 +1134,9 @@ i40e_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts) uint32_t td_tag; uint64_t ol_flags; uint8_t l2_len; - uint8_t l3_len; + uint16_t l3_len; + uint8_t inner_l2_len; + uint16_t inner_l3_len; uint16_t nb_used; uint16_t nb_ctx; uint16_t tx_last; @@ -1134,7 +1164,9 @@ i40e_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts) ol_flags = tx_pkt->ol_flags; l2_len = tx_pkt->l2_len; + inner_l2_len = tx_pkt->inner_l2_len; l3_len = tx_pkt->l3_len; + inner_l3_len = tx_pkt->inner_l3_len; /* Calculate the number of context descriptors needed. */ nb_ctx = i40e_calc_context_desc(ol_flags); @@ -1182,15 +1214,17 @@ i40e_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts) td_cmd |= I40E_TX_DESC_CMD_ICRC; /* Enable checksum offloading */ + cd_tunneling_params = 0; i40e_txd_enable_checksum(ol_flags, &td_cmd, &td_offset, - l2_len, l3_len); + l2_len, l3_len, inner_l2_len, + inner_l3_len, + &cd_tunneling_params); if (unlikely(nb_ctx)) { /* Setup TX context descriptor if required */ volatile struct i40e_tx_context_desc *ctx_txd = (volatile struct i40e_tx_context_desc *)\ &txr[tx_id]; - uint32_t cd_tunneling_params = 0; uint16_t cd_l2tag2 = 0; uint64_t cd_type_cmd_tso_mss = I40E_TX_DESC_DTYPE_CONTEXT; -- 2.20.1