New upstream version 17.11-rc3

[deb_dpdk.git] / lib / librte_gso / rte_gso.c

diff --git a/lib/librte_gso/rte_gso.c b/lib/librte_gso/rte_gso.c
new file mode 100644 (file)
index 0000000..f86e654
--- /dev/null
+++ b/lib/librte_gso/rte_gso.c
@@ -0,0 +1,110 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2017 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#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;
+}