[dpdk-dev] [PATCH v1 13/15] net/hinic: support inner L3 checksum offload

Ziyang Xuan xuanziyang2 at huawei.com
Fri Sep 6 14:55:04 CEST 2019


From: Xiaoyun Wang <cloud.wangxiaoyun at huawei.com>

This patch supports inner L3 checksum offload.

Signed-off-by: Ziyang Xuan <xuanziyang2 at huawei.com>
---
 drivers/net/hinic/hinic_pmd_tx.c | 192 ++++++++++++++++++++++++---------------
 1 file changed, 121 insertions(+), 71 deletions(-)

diff --git a/drivers/net/hinic/hinic_pmd_tx.c b/drivers/net/hinic/hinic_pmd_tx.c
index 0ef7add..155ea61 100644
--- a/drivers/net/hinic/hinic_pmd_tx.c
+++ b/drivers/net/hinic/hinic_pmd_tx.c
@@ -20,6 +20,9 @@
 #include "hinic_pmd_tx.h"
 
 /* packet header and tx offload info */
+#define ETHER_LEN_NO_VLAN		14
+#define ETHER_LEN_WITH_VLAN		18
+#define HEADER_LEN_OFFSET		2
 #define VXLANLEN			8
 #define MAX_PLD_OFFSET			221
 #define MAX_SINGLE_SGE_SIZE		65536
@@ -34,6 +37,9 @@
 #define HINIC_TSO_PKT_MAX_SGE			127	/* tso max sge 127 */
 #define HINIC_TSO_SEG_NUM_INVALID(num)		((num) > HINIC_TSO_PKT_MAX_SGE)
 
+#define HINIC_TX_OUTER_CHECKSUM_FLAG_SET       1
+#define HINIC_TX_OUTER_CHECKSUM_FLAG_NO_SET    0
+
 /* sizeof(struct hinic_sq_bufdesc) == 16, shift 4 */
 #define HINIC_BUF_DESC_SIZE(nr_descs)	(SIZE_8BYTES(((u32)nr_descs) << 4))
 
@@ -476,16 +482,16 @@ static inline bool hinic_is_tso_sge_valid(struct rte_mbuf *mbuf,
 hinic_set_l4_csum_info(struct hinic_sq_task *task,
 		u32 *queue_info, struct hinic_tx_offload_info *poff_info)
 {
-	u32 tcp_udp_cs, sctp;
+	u32 tcp_udp_cs, sctp = 0;
 	u16 l2hdr_len;
 
-	sctp = 0;
 	if (unlikely(poff_info->inner_l4_type == SCTP_OFFLOAD_ENABLE))
 		sctp = 1;
 
 	tcp_udp_cs = poff_info->inner_l4_tcp_udp;
 
-	if (poff_info->tunnel_type == TUNNEL_UDP_NO_CSUM) {
+	if (poff_info->tunnel_type == TUNNEL_UDP_CSUM ||
+	    poff_info->tunnel_type == TUNNEL_UDP_NO_CSUM) {
 		l2hdr_len =  poff_info->outer_l2_len;
 
 		task->pkt_info2 |=
@@ -665,50 +671,6 @@ static inline void hinic_xmit_mbuf_cleanup(struct hinic_txq *txq)
 	return (struct hinic_sq_wqe *)WQ_WQE_ADDR(wq, cur_pi);
 }
 
-static inline int
-hinic_validate_tx_offload(const struct rte_mbuf *m)
-{
-	uint64_t ol_flags = m->ol_flags;
-	uint64_t inner_l3_offset = m->l2_len;
-
-	/* just support vxlan offload */
-	if ((ol_flags & PKT_TX_TUNNEL_MASK) &&
-	    !(ol_flags & PKT_TX_TUNNEL_VXLAN))
-		return -ENOTSUP;
-
-	if (ol_flags & PKT_TX_OUTER_IP_CKSUM)
-		inner_l3_offset += m->outer_l2_len + m->outer_l3_len;
-
-	/* Headers are fragmented */
-	if (rte_pktmbuf_data_len(m) < inner_l3_offset + m->l3_len + m->l4_len)
-		return -ENOTSUP;
-
-	/* IP checksum can be counted only for IPv4 packet */
-	if ((ol_flags & PKT_TX_IP_CKSUM) && (ol_flags & PKT_TX_IPV6))
-		return -EINVAL;
-
-	/* IP type not set when required */
-	if (ol_flags & (PKT_TX_L4_MASK | PKT_TX_TCP_SEG)) {
-		if (!(ol_flags & (PKT_TX_IPV4 | PKT_TX_IPV6)))
-			return -EINVAL;
-	}
-
-	/* Check requirements for TSO packet */
-	if (ol_flags & PKT_TX_TCP_SEG) {
-		if (m->tso_segsz == 0 ||
-			((ol_flags & PKT_TX_IPV4) &&
-			!(ol_flags & PKT_TX_IP_CKSUM)))
-			return -EINVAL;
-	}
-
-	/* PKT_TX_OUTER_IP_CKSUM set for non outer IPv4 packet. */
-	if ((ol_flags & PKT_TX_OUTER_IP_CKSUM) &&
-		!(ol_flags & PKT_TX_OUTER_IPV4))
-		return -EINVAL;
-
-	return 0;
-}
-
 static inline uint16_t
 hinic_ipv4_phdr_cksum(const struct rte_ipv4_hdr *ipv4_hdr, uint64_t ol_flags)
 {
@@ -760,6 +722,67 @@ static inline void hinic_xmit_mbuf_cleanup(struct hinic_txq *txq)
 	return __rte_raw_cksum_reduce(sum);
 }
 
+static inline void
+hinic_get_pld_offset(struct rte_mbuf *m, struct hinic_tx_offload_info *off_info,
+		     int outer_cs_flag)
+{
+	uint64_t ol_flags = m->ol_flags;
+
+	if (outer_cs_flag == 1) {
+		if ((ol_flags & PKT_TX_UDP_CKSUM) == PKT_TX_UDP_CKSUM) {
+			off_info->payload_offset = m->outer_l2_len +
+				m->outer_l3_len + m->l2_len + m->l3_len;
+		} else if ((ol_flags & PKT_TX_TCP_CKSUM) ||
+				(ol_flags & PKT_TX_TCP_SEG)) {
+			off_info->payload_offset = m->outer_l2_len +
+					m->outer_l3_len + m->l2_len +
+					m->l3_len + m->l4_len;
+		}
+	} else {
+		if ((ol_flags & PKT_TX_UDP_CKSUM) == PKT_TX_UDP_CKSUM) {
+			off_info->payload_offset = m->l2_len + m->l3_len;
+		} else if ((ol_flags & PKT_TX_TCP_CKSUM) ||
+			(ol_flags & PKT_TX_TCP_SEG)) {
+			off_info->payload_offset = m->l2_len + m->l3_len +
+						   m->l4_len;
+		}
+	}
+}
+
+static inline void
+hinic_analyze_tx_info(struct rte_mbuf *mbuf,
+		      struct hinic_tx_offload_info *off_info)
+{
+	struct rte_ether_hdr *eth_hdr;
+	struct rte_vlan_hdr *vlan_hdr;
+	struct rte_ipv4_hdr *ip4h;
+	u16 ethertype, l3_proto;
+	u8 *hdr;
+
+	hdr = (u8 *)rte_pktmbuf_mtod(mbuf, u8*);
+	eth_hdr = (struct rte_ether_hdr *)hdr;
+	ethertype = rte_be_to_cpu_16(eth_hdr->ether_type);
+
+	if (ethertype == RTE_ETHER_TYPE_VLAN) {
+		off_info->outer_l2_len = ETHER_LEN_WITH_VLAN;
+		vlan_hdr = (struct rte_vlan_hdr *)(hdr + 1);
+		ethertype = rte_be_to_cpu_16(vlan_hdr->eth_proto);
+	} else {
+		off_info->outer_l2_len = ETHER_LEN_NO_VLAN;
+	}
+
+	l3_proto = ethertype;
+
+	if (l3_proto == RTE_ETHER_TYPE_IPV4) {
+		ip4h = (struct rte_ipv4_hdr *)(hdr + off_info->outer_l2_len);
+		off_info->outer_l3_len = (ip4h->version_ihl & 0xf) <<
+					HEADER_LEN_OFFSET;
+	} else if (l3_proto == RTE_ETHER_TYPE_IPV6) {
+		/* not support ipv6 extension header */
+		off_info->outer_l3_len = sizeof(struct rte_ipv6_hdr);
+	}
+}
+
 static inline int
 hinic_tx_offload_pkt_prepare(struct rte_mbuf *m,
 				struct hinic_tx_offload_info *off_info)
@@ -771,42 +794,66 @@ static inline void hinic_xmit_mbuf_cleanup(struct hinic_txq *txq)
 	struct rte_ether_hdr *eth_hdr;
 	struct rte_vlan_hdr *vlan_hdr;
 	u16 eth_type = 0;
-	uint64_t inner_l3_offset = m->l2_len;
+	uint64_t inner_l3_offset;
 	uint64_t ol_flags = m->ol_flags;
 
-	/* Does packet set any of available offloads */
+	/* Check packet set any of available offloads */
 	if (!(ol_flags & HINIC_TX_CKSUM_OFFLOAD_MASK))
 		return 0;
 
-	if (unlikely(hinic_validate_tx_offload(m)))
+	/* just support vxlan offload */
+	if ((ol_flags & PKT_TX_TUNNEL_MASK) &&
+	    !(ol_flags & PKT_TX_TUNNEL_VXLAN))
+		return -ENOTSUP;
+
+#ifdef RTE_LIBRTE_ETHDEV_DEBUG
+	if (rte_validate_tx_offload(m) != 0)
 		return -EINVAL;
+#endif
 
-	if ((ol_flags & PKT_TX_OUTER_IP_CKSUM) ||
-			(ol_flags & PKT_TX_OUTER_IPV6) ||
-			(ol_flags & PKT_TX_TUNNEL_VXLAN)) {
-		inner_l3_offset += m->outer_l2_len + m->outer_l3_len;
-		off_info->outer_l2_len = m->outer_l2_len;
-		off_info->outer_l3_len = m->outer_l3_len;
-		/* just support vxlan tunneling pkt */
-		off_info->inner_l2_len = m->l2_len - VXLANLEN -
-						sizeof(struct rte_udp_hdr);
-		off_info->inner_l3_len = m->l3_len;
-		off_info->inner_l4_len = m->l4_len;
-		off_info->tunnel_length = m->l2_len;
-		off_info->payload_offset = m->outer_l2_len +
-				m->outer_l3_len + m->l2_len + m->l3_len;
-		off_info->tunnel_type = TUNNEL_UDP_NO_CSUM;
+	if (ol_flags & PKT_TX_TUNNEL_VXLAN) {
+		if ((ol_flags & PKT_TX_OUTER_IP_CKSUM) ||
+		    (ol_flags & PKT_TX_OUTER_IPV6)) {
+			inner_l3_offset = m->l2_len + m->outer_l2_len +
+				m->outer_l3_len;
+			off_info->outer_l2_len = m->outer_l2_len;
+			off_info->outer_l3_len = m->outer_l3_len;
+			/* just support vxlan tunneling pkt */
+			off_info->inner_l2_len = m->l2_len - VXLANLEN -
+				sizeof(*udp_hdr);
+			off_info->inner_l3_len = m->l3_len;
+			off_info->inner_l4_len = m->l4_len;
+			off_info->tunnel_length = m->l2_len;
+			off_info->tunnel_type = TUNNEL_UDP_NO_CSUM;
+
+			hinic_get_pld_offset(m, off_info,
+					     HINIC_TX_OUTER_CHECKSUM_FLAG_SET);
+		} else {
+			inner_l3_offset = m->l2_len;
+			hinic_analyze_tx_info(m, off_info);
+			/* just support vxlan tunneling pkt */
+			off_info->inner_l2_len = m->l2_len - VXLANLEN -
+				sizeof(*udp_hdr) - off_info->outer_l2_len -
+				off_info->outer_l3_len;
+			off_info->inner_l3_len = m->l3_len;
+			off_info->inner_l4_len = m->l4_len;
+			off_info->tunnel_length = m->l2_len -
+				off_info->outer_l2_len - off_info->outer_l3_len;
+			off_info->tunnel_type = TUNNEL_UDP_NO_CSUM;
+
+			hinic_get_pld_offset(m, off_info,
+				HINIC_TX_OUTER_CHECKSUM_FLAG_NO_SET);
+		}
 	} else {
+		inner_l3_offset = m->l2_len;
 		off_info->inner_l2_len = m->l2_len;
 		off_info->inner_l3_len = m->l3_len;
 		off_info->inner_l4_len = m->l4_len;
 		off_info->tunnel_type = NOT_TUNNEL;
-		off_info->payload_offset = m->l2_len + m->l3_len;
-	}
 
-	if (((ol_flags & PKT_TX_L4_MASK) != PKT_TX_SCTP_CKSUM) &&
-	    ((ol_flags & PKT_TX_L4_MASK) != PKT_TX_UDP_CKSUM))
-		off_info->payload_offset += m->l4_len;
+		hinic_get_pld_offset(m, off_info,
+				     HINIC_TX_OUTER_CHECKSUM_FLAG_NO_SET);
+	}
 
 	/* invalid udp or tcp header */
 	if (unlikely(off_info->payload_offset > MAX_PLD_OFFSET))
@@ -855,6 +902,10 @@ static inline void hinic_xmit_mbuf_cleanup(struct hinic_txq *txq)
 			udp_hdr->dgram_cksum =
 				hinic_ipv6_phdr_cksum(ipv6_hdr, ol_flags);
 		}
+	} else if (ol_flags & PKT_TX_OUTER_IPV4) {
+		off_info->tunnel_type = TUNNEL_UDP_NO_CSUM;
+		off_info->inner_l4_tcp_udp = 1;
+		off_info->outer_l3_type = IPV4_PKT_NO_CHKSUM_OFFLOAD;
 	}
 
 	if (ol_flags & PKT_TX_IPV4)
@@ -892,7 +943,6 @@ static inline void hinic_xmit_mbuf_cleanup(struct hinic_txq *txq)
 
 		off_info->inner_l4_type = UDP_OFFLOAD_ENABLE;
 		off_info->inner_l4_tcp_udp = 1;
-		off_info->inner_l4_len = sizeof(struct rte_udp_hdr);
 	} else if (((ol_flags & PKT_TX_L4_MASK) == PKT_TX_TCP_CKSUM) ||
 			(ol_flags & PKT_TX_TCP_SEG)) {
 		if (ol_flags & PKT_TX_IPV4) {
-- 
1.8.3.1



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