--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 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 <string.h>
+
+#include <rte_ether.h>
+#include <rte_ip_frag.h>
+
+#include "rte_port_frag.h"
+
+/* Default byte size for the IPv4 Maximum Transfer Unit (MTU).
+ * This value includes the size of IPv4 header. */
+#define IPV4_MTU_DEFAULT ETHER_MTU
+
+/* Max number of fragments per packet allowed */
+#define IPV4_MAX_FRAGS_PER_PACKET 0x80
+
+struct rte_port_ring_reader_ipv4_frag {
+ /* Input parameters */
+ struct rte_ring *ring;
+ uint32_t mtu;
+ uint32_t metadata_size;
+ struct rte_mempool *pool_direct;
+ struct rte_mempool *pool_indirect;
+
+ /* Internal buffers */
+ struct rte_mbuf *pkts[RTE_PORT_IN_BURST_SIZE_MAX];
+ struct rte_mbuf *frags[IPV4_MAX_FRAGS_PER_PACKET];
+ uint32_t n_pkts;
+ uint32_t pos_pkts;
+ uint32_t n_frags;
+ uint32_t pos_frags;
+} __rte_cache_aligned;
+
+static void *
+rte_port_ring_reader_ipv4_frag_create(void *params, int socket_id)
+{
+ struct rte_port_ring_reader_ipv4_frag_params *conf =
+ (struct rte_port_ring_reader_ipv4_frag_params *) params;
+ struct rte_port_ring_reader_ipv4_frag *port;
+
+ /* Check input parameters */
+ if (conf == NULL) {
+ RTE_LOG(ERR, PORT, "%s: Parameter conf is NULL\n", __func__);
+ return NULL;
+ }
+ if (conf->ring == NULL) {
+ RTE_LOG(ERR, PORT, "%s: Parameter ring is NULL\n", __func__);
+ return NULL;
+ }
+ if (conf->mtu == 0) {
+ RTE_LOG(ERR, PORT, "%s: Parameter mtu is invalid\n", __func__);
+ return NULL;
+ }
+ if (conf->pool_direct == NULL) {
+ RTE_LOG(ERR, PORT, "%s: Parameter pool_direct is NULL\n",
+ __func__);
+ return NULL;
+ }
+ if (conf->pool_indirect == NULL) {
+ RTE_LOG(ERR, PORT, "%s: Parameter pool_indirect is NULL\n",
+ __func__);
+ return NULL;
+ }
+
+ /* Memory allocation */
+ port = rte_zmalloc_socket("PORT", sizeof(*port), CACHE_LINE_SIZE,
+ socket_id);
+ if (port == NULL) {
+ RTE_LOG(ERR, PORT, "%s: port is NULL\n", __func__);
+ return NULL;
+ }
+
+ /* Initialization */
+ port->ring = conf->ring;
+ port->mtu = conf->mtu;
+ port->metadata_size = conf->metadata_size;
+ port->pool_direct = conf->pool_direct;
+ port->pool_indirect = conf->pool_indirect;
+
+ port->n_pkts = 0;
+ port->pos_pkts = 0;
+ port->n_frags = 0;
+ port->pos_frags = 0;
+
+ return port;
+}
+
+static int
+rte_port_ring_reader_ipv4_frag_rx(void *port,
+ struct rte_mbuf **pkts,
+ uint32_t n_pkts)
+{
+ struct rte_port_ring_reader_ipv4_frag *p =
+ (struct rte_port_ring_reader_ipv4_frag *) port;
+ uint32_t n_pkts_out;
+
+ n_pkts_out = 0;
+
+ /* Get packets from the "frag" buffer */
+ if (p->n_frags >= n_pkts) {
+ memcpy(pkts, &p->frags[p->pos_frags], n_pkts * sizeof(void *));
+ p->pos_frags += n_pkts;
+ p->n_frags -= n_pkts;
+
+ return n_pkts;
+ }
+
+ memcpy(pkts, &p->frags[p->pos_frags], p->n_frags * sizeof(void *));
+ n_pkts_out = p->n_frags;
+ p->n_frags = 0;
+
+ /* Look to "pkts" buffer to get more packets */
+ for ( ; ; ) {
+ struct rte_mbuf *pkt;
+ uint32_t n_pkts_to_provide, i;
+ int status;
+
+ /* If "pkts" buffer is empty, read packet burst from ring */
+ if (p->n_pkts == 0) {
+ p->n_pkts = rte_ring_sc_dequeue_burst(p->ring,
+ (void **) p->pkts, RTE_PORT_IN_BURST_SIZE_MAX);
+ if (p->n_pkts == 0)
+ return n_pkts_out;
+ p->pos_pkts = 0;
+ }
+
+ /* Read next packet from "pkts" buffer */
+ pkt = p->pkts[p->pos_pkts++];
+ p->n_pkts--;
+
+ /* If not jumbo, pass current packet to output */
+ if (pkt->pkt.pkt_len <= IPV4_MTU_DEFAULT) {
+ pkts[n_pkts_out++] = pkt;
+
+ n_pkts_to_provide = n_pkts - n_pkts_out;
+ if (n_pkts_to_provide == 0)
+ return n_pkts;
+
+ continue;
+ }
+
+ /* Fragment current packet into the "frags" buffer */
+ status = rte_ipv4_fragment_packet(
+ pkt,
+ p->frags,
+ IPV4_MAX_FRAGS_PER_PACKET,
+ p->mtu,
+ p->pool_direct,
+ p->pool_indirect
+ );
+
+ if (status < 0) {
+ rte_pktmbuf_free(pkt);
+ continue;
+ }
+
+ p->n_frags = (uint32_t) status;
+ p->pos_frags = 0;
+
+ /* Copy meta-data from input jumbo packet to its fragments */
+ for (i = 0; i < p->n_frags; i++) {
+ uint8_t *src = RTE_MBUF_METADATA_UINT8_PTR(pkt, 0);
+ uint8_t *dst =
+ RTE_MBUF_METADATA_UINT8_PTR(p->frags[i], 0);
+
+ memcpy(dst, src, p->metadata_size);
+ }
+
+ /* Free input jumbo packet */
+ rte_pktmbuf_free(pkt);
+
+ /* Get packets from "frag" buffer */
+ n_pkts_to_provide = n_pkts - n_pkts_out;
+ if (p->n_frags >= n_pkts_to_provide) {
+ memcpy(&pkts[n_pkts_out], p->frags,
+ n_pkts_to_provide * sizeof(void *));
+ p->n_frags -= n_pkts_to_provide;
+ p->pos_frags += n_pkts_to_provide;
+
+ return n_pkts;
+ }
+
+ memcpy(&pkts[n_pkts_out], p->frags,
+ p->n_frags * sizeof(void *));
+ n_pkts_out += p->n_frags;
+ p->n_frags = 0;
+ }
+}
+
+static int
+rte_port_ring_reader_ipv4_frag_free(void *port)
+{
+ if (port == NULL) {
+ RTE_LOG(ERR, PORT, "%s: Parameter port is NULL\n", __func__);
+ return -1;
+ }
+
+ rte_free(port);
+
+ return 0;
+}
+
+/*
+ * Summary of port operations
+ */
+struct rte_port_in_ops rte_port_ring_reader_ipv4_frag_ops = {
+ .f_create = rte_port_ring_reader_ipv4_frag_create,
+ .f_free = rte_port_ring_reader_ipv4_frag_free,
+ .f_rx = rte_port_ring_reader_ipv4_frag_rx,
+};
--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 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.
+ */
+
+#ifndef __INCLUDE_RTE_PORT_IP_FRAG_H__
+#define __INCLUDE_RTE_PORT_IP_FRAG_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @file
+ * RTE Port for IPv4 Fragmentation
+ *
+ * This port is built on top of pre-initialized single consumer rte_ring. In
+ * order to minimize the amount of packets stored in the ring at any given
+ * time, the IP fragmentation functionality is executed on ring read operation,
+ * hence this port is implemented as an input port. A regular ring_writer port
+ * can be created to write to the same ring.
+ *
+ * The packets written to the ring are either complete IP datagrams or jumbo
+ * frames (i.e. IP packets with length bigger than provided MTU value). The
+ * packets read from the ring are all non-jumbo frames. The complete IP
+ * datagrams written to the ring are not changed. The jumbo frames are
+ * fragmented into several IP packets with length less or equal to MTU.
+ *
+ ***/
+
+#include <stdint.h>
+
+#include <rte_ring.h>
+
+#include "rte_port.h"
+
+/** ring_reader_ipv4_frag port parameters */
+struct rte_port_ring_reader_ipv4_frag_params {
+ /** Underlying single consumer ring that has to be pre-initialized. */
+ struct rte_ring *ring;
+
+ /** Maximum Transfer Unit (MTU). Maximum IP packet size (in bytes). */
+ uint32_t mtu;
+
+ /** Size of application dependent meta-data stored per each input packet
+ that has to be copied to each of the fragments originating from the
+ same input IP datagram. */
+ uint32_t metadata_size;
+
+ /** Pre-initialized buffer pool used for allocating direct buffers for
+ the output fragments. */
+ struct rte_mempool *pool_direct;
+
+ /** Pre-initialized buffer pool used for allocating indirect buffers for
+ the output fragments. */
+ struct rte_mempool *pool_indirect;
+};
+
+/** ring_reader_ipv4_frag port operations */
+extern struct rte_port_in_ops rte_port_ring_reader_ipv4_frag_ops;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
git.droids-corp.org / dpdk.git / commitdiff