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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2017 Intel Corporation
*/
#include <errno.h>
#include <rte_log.h>
#include <rte_ethdev.h>
#include "rte_gso.h"
#include "gso_common.h"
#include "gso_tcp4.h"
#include "gso_tunnel_tcp4.h"
int
rte_gso_segment(struct rte_mbuf *pkt,
const struct rte_gso_ctx *gso_ctx,
struct rte_mbuf **pkts_out,
uint16_t nb_pkts_out)
{
struct rte_mempool *direct_pool, *indirect_pool;
struct rte_mbuf *pkt_seg;
uint64_t ol_flags;
uint16_t gso_size;
uint8_t ipid_delta;
int ret = 1;
if (pkt == NULL || pkts_out == NULL || gso_ctx == NULL ||
nb_pkts_out < 1 ||
gso_ctx->gso_size < RTE_GSO_SEG_SIZE_MIN ||
((gso_ctx->gso_types & (DEV_TX_OFFLOAD_TCP_TSO |
DEV_TX_OFFLOAD_VXLAN_TNL_TSO |
DEV_TX_OFFLOAD_GRE_TNL_TSO)) == 0))
return -EINVAL;
if (gso_ctx->gso_size >= pkt->pkt_len) {
pkt->ol_flags &= (~PKT_TX_TCP_SEG);
pkts_out[0] = pkt;
return 1;
}
direct_pool = gso_ctx->direct_pool;
indirect_pool = gso_ctx->indirect_pool;
gso_size = gso_ctx->gso_size;
ipid_delta = (gso_ctx->flag != RTE_GSO_FLAG_IPID_FIXED);
ol_flags = pkt->ol_flags;
if ((IS_IPV4_VXLAN_TCP4(pkt->ol_flags) &&
(gso_ctx->gso_types & DEV_TX_OFFLOAD_VXLAN_TNL_TSO)) ||
((IS_IPV4_GRE_TCP4(pkt->ol_flags) &&
(gso_ctx->gso_types & DEV_TX_OFFLOAD_GRE_TNL_TSO)))) {
pkt->ol_flags &= (~PKT_TX_TCP_SEG);
ret = gso_tunnel_tcp4_segment(pkt, gso_size, ipid_delta,
direct_pool, indirect_pool,
pkts_out, nb_pkts_out);
} else if (IS_IPV4_TCP(pkt->ol_flags) &&
(gso_ctx->gso_types & DEV_TX_OFFLOAD_TCP_TSO)) {
pkt->ol_flags &= (~PKT_TX_TCP_SEG);
ret = gso_tcp4_segment(pkt, gso_size, ipid_delta,
direct_pool, indirect_pool,
pkts_out, nb_pkts_out);
} else {
/* unsupported packet, skip */
pkts_out[0] = pkt;
RTE_LOG(DEBUG, GSO, "Unsupported packet type\n");
return 1;
}
if (ret > 1) {
pkt_seg = pkt;
while (pkt_seg) {
rte_mbuf_refcnt_update(pkt_seg, -1);
pkt_seg = pkt_seg->next;
}
} else if (ret < 0) {
/* Revert the ol_flags in the event of failure. */
pkt->ol_flags = ol_flags;
}
return ret;
}
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