1 /*- 2 * BSD LICENSE 3 * 4 * Copyright(c) 2017 Intel Corporation. All rights reserved. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of Intel Corporation nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <errno.h> 35 36 #include <rte_log.h> 37 #include <rte_ethdev.h> 38 39 #include "rte_gso.h" 40 #include "gso_common.h" 41 #include "gso_tcp4.h" 42 #include "gso_tunnel_tcp4.h" 43 44 int 45 rte_gso_segment(struct rte_mbuf *pkt, 46 const struct rte_gso_ctx *gso_ctx, 47 struct rte_mbuf **pkts_out, 48 uint16_t nb_pkts_out) 49 { 50 struct rte_mempool *direct_pool, *indirect_pool; 51 struct rte_mbuf *pkt_seg; 52 uint64_t ol_flags; 53 uint16_t gso_size; 54 uint8_t ipid_delta; 55 int ret = 1; 56 57 if (pkt == NULL || pkts_out == NULL || gso_ctx == NULL || 58 nb_pkts_out < 1 || 59 gso_ctx->gso_size < RTE_GSO_SEG_SIZE_MIN || 60 ((gso_ctx->gso_types & (DEV_TX_OFFLOAD_TCP_TSO | 61 DEV_TX_OFFLOAD_VXLAN_TNL_TSO | 62 DEV_TX_OFFLOAD_GRE_TNL_TSO)) == 0)) 63 return -EINVAL; 64 65 if (gso_ctx->gso_size >= pkt->pkt_len) { 66 pkt->ol_flags &= (~PKT_TX_TCP_SEG); 67 pkts_out[0] = pkt; 68 return 1; 69 } 70 71 direct_pool = gso_ctx->direct_pool; 72 indirect_pool = gso_ctx->indirect_pool; 73 gso_size = gso_ctx->gso_size; 74 ipid_delta = (gso_ctx->flag != RTE_GSO_FLAG_IPID_FIXED); 75 ol_flags = pkt->ol_flags; 76 77 if ((IS_IPV4_VXLAN_TCP4(pkt->ol_flags) && 78 (gso_ctx->gso_types & DEV_TX_OFFLOAD_VXLAN_TNL_TSO)) || 79 ((IS_IPV4_GRE_TCP4(pkt->ol_flags) && 80 (gso_ctx->gso_types & DEV_TX_OFFLOAD_GRE_TNL_TSO)))) { 81 pkt->ol_flags &= (~PKT_TX_TCP_SEG); 82 ret = gso_tunnel_tcp4_segment(pkt, gso_size, ipid_delta, 83 direct_pool, indirect_pool, 84 pkts_out, nb_pkts_out); 85 } else if (IS_IPV4_TCP(pkt->ol_flags) && 86 (gso_ctx->gso_types & DEV_TX_OFFLOAD_TCP_TSO)) { 87 pkt->ol_flags &= (~PKT_TX_TCP_SEG); 88 ret = gso_tcp4_segment(pkt, gso_size, ipid_delta, 89 direct_pool, indirect_pool, 90 pkts_out, nb_pkts_out); 91 } else { 92 /* unsupported packet, skip */ 93 pkts_out[0] = pkt; 94 RTE_LOG(DEBUG, GSO, "Unsupported packet type\n"); 95 return 1; 96 } 97 98 if (ret > 1) { 99 pkt_seg = pkt; 100 while (pkt_seg) { 101 rte_mbuf_refcnt_update(pkt_seg, -1); 102 pkt_seg = pkt_seg->next; 103 } 104 } else if (ret < 0) { 105 /* Revert the ol_flags in the event of failure. */ 106 pkt->ol_flags = ol_flags; 107 } 108 109 return ret; 110 } 111