1 /* SPDX-License-Identifier: BSD-3-Clause
3 * Copyright(c) 2019-2020 Xilinx, Inc.
4 * Copyright(c) 2018-2019 Solarflare Communications Inc.
6 * This software was jointly developed between OKTET Labs (under contract
7 * for Solarflare) and Solarflare Communications, Inc.
17 /** Standard TSO header length */
18 #define SFC_TSOH_STD_LEN 256
20 /** The number of TSO option descriptors that precede the packet descriptors */
21 #define SFC_EF10_TSO_OPT_DESCS_NUM 2
24 * The number of DMA descriptors for TSO header that may or may not precede the
25 * packet's payload descriptors
27 #define SFC_EF10_TSO_HDR_DESCS_NUM 1
29 static inline uint16_t
30 sfc_tso_ip4_get_ipid(const uint8_t *pkt_hdrp, size_t ip_hdr_off)
32 const struct rte_ipv4_hdr *ip_hdrp;
35 ip_hdrp = (const struct rte_ipv4_hdr *)(pkt_hdrp + ip_hdr_off);
36 rte_memcpy(&ipid, &ip_hdrp->packet_id, sizeof(ipid));
38 return rte_be_to_cpu_16(ipid);
42 sfc_tso_outer_udp_fix_len(const struct rte_mbuf *m, uint8_t *tsoh)
44 rte_be16_t len = rte_cpu_to_be_16(m->l2_len + m->l3_len + m->l4_len +
47 rte_memcpy(tsoh + m->outer_l2_len + m->outer_l3_len +
48 offsetof(struct rte_udp_hdr, dgram_len),
53 sfc_tso_innermost_ip_fix_len(const struct rte_mbuf *m, uint8_t *tsoh,
56 size_t ip_payload_len = m->l4_len + m->tso_segsz;
60 if (m->ol_flags & PKT_TX_IPV4) {
61 field_ofst = offsetof(struct rte_ipv4_hdr, total_length);
62 len = rte_cpu_to_be_16(m->l3_len + ip_payload_len);
64 field_ofst = offsetof(struct rte_ipv6_hdr, payload_len);
65 len = rte_cpu_to_be_16(ip_payload_len);
68 rte_memcpy(tsoh + iph_ofst + field_ofst, &len, sizeof(len));
71 unsigned int sfc_tso_prepare_header(uint8_t *tsoh, size_t header_len,
72 struct rte_mbuf **in_seg, size_t *in_off);
78 #endif /* _SFC_TSO_H */