--- /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_cycles.h>
+#include <rte_log.h>
+
+#include "rte_port_ras.h"
+
+#ifndef IPV4_RAS_N_BUCKETS
+#define IPV4_RAS_N_BUCKETS 4094
+#endif
+
+#ifndef IPV4_RAS_N_ENTRIES_PER_BUCKET
+#define IPV4_RAS_N_ENTRIES_PER_BUCKET 8
+#endif
+
+#ifndef IPV4_RAS_N_ENTRIES
+#define IPV4_RAS_N_ENTRIES (IPV4_RAS_N_BUCKETS * IPV4_RAS_N_ENTRIES_PER_BUCKET)
+#endif
+
+struct rte_port_ring_writer_ipv4_ras {
+ struct rte_mbuf *tx_buf[RTE_PORT_IN_BURST_SIZE_MAX];
+ struct rte_ring *ring;
+ uint32_t tx_burst_sz;
+ uint32_t tx_buf_count;
+ struct rte_ip_frag_tbl *frag_tbl;
+ struct rte_ip_frag_death_row death_row;
+};
+
+static void *
+rte_port_ring_writer_ipv4_ras_create(void *params, int socket_id)
+{
+ struct rte_port_ring_writer_ipv4_ras_params *conf =
+ (struct rte_port_ring_writer_ipv4_ras_params *) params;
+ struct rte_port_ring_writer_ipv4_ras *port;
+ uint64_t frag_cycles;
+
+ /* 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->tx_burst_sz == 0) ||
+ (conf->tx_burst_sz > RTE_PORT_IN_BURST_SIZE_MAX)) {
+ RTE_LOG(ERR, PORT, "%s: Parameter tx_burst_sz is invalid\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: Failed to allocate socket\n", __func__);
+ return NULL;
+ }
+
+ /* Create fragmentation table */
+ frag_cycles = (rte_get_tsc_hz() + MS_PER_S - 1) / MS_PER_S * MS_PER_S;
+ frag_cycles *= 100;
+
+ port->frag_tbl = rte_ip_frag_table_create(
+ IPV4_RAS_N_BUCKETS,
+ IPV4_RAS_N_ENTRIES_PER_BUCKET,
+ IPV4_RAS_N_ENTRIES,
+ frag_cycles,
+ socket_id);
+
+ if (port->frag_tbl == NULL) {
+ RTE_LOG(ERR, PORT, "%s: rte_ip_frag_table_create failed\n",
+ __func__);
+ rte_free(port);
+ return NULL;
+ }
+
+ /* Initialization */
+ port->ring = conf->ring;
+ port->tx_burst_sz = conf->tx_burst_sz;
+ port->tx_buf_count = 0;
+
+ return port;
+}
+
+static inline void
+send_burst(struct rte_port_ring_writer_ipv4_ras *p)
+{
+ uint32_t nb_tx;
+
+ nb_tx = rte_ring_sp_enqueue_burst(p->ring, (void **)p->tx_buf,
+ p->tx_buf_count);
+
+ for ( ; nb_tx < p->tx_buf_count; nb_tx++)
+ rte_pktmbuf_free(p->tx_buf[nb_tx]);
+
+ p->tx_buf_count = 0;
+}
+
+static inline void
+process_one(struct rte_port_ring_writer_ipv4_ras *p, struct rte_mbuf *pkt)
+{
+ /* Assume there is no ethernet header */
+ struct ipv4_hdr *pkt_hdr = (struct ipv4_hdr *)
+ (rte_pktmbuf_mtod(pkt, unsigned char *));
+
+ /* Get "Do not fragment" flag and fragment offset */
+ uint16_t frag_field = rte_be_to_cpu_16(pkt_hdr->fragment_offset);
+ uint16_t frag_offset = (uint16_t)(frag_field & IPV4_HDR_OFFSET_MASK);
+ uint16_t frag_flag = (uint16_t)(frag_field & IPV4_HDR_MF_FLAG);
+
+ /* If it is a fragmented packet, then try to reassemble */
+ if ((frag_flag == 0) && (frag_offset == 0))
+ p->tx_buf[p->tx_buf_count++] = pkt;
+ else {
+ struct rte_mbuf *mo;
+ struct rte_ip_frag_tbl *tbl = p->frag_tbl;
+ struct rte_ip_frag_death_row *dr = &p->death_row;
+
+ /* Process this fragment */
+ mo = rte_ipv4_frag_reassemble_packet(tbl, dr, pkt, rte_rdtsc(), pkt_hdr);
+ if (mo != NULL)
+ p->tx_buf[p->tx_buf_count++] = mo;
+
+ rte_ip_frag_free_death_row(&p->death_row, 3);
+ }
+}
+
+static int
+rte_port_ring_writer_ipv4_ras_tx(void *port, struct rte_mbuf *pkt)
+{
+ struct rte_port_ring_writer_ipv4_ras *p =
+ (struct rte_port_ring_writer_ipv4_ras *) port;
+
+ process_one(p, pkt);
+ if (p->tx_buf_count >= p->tx_burst_sz)
+ send_burst(p);
+
+ return 0;
+}
+
+static int
+rte_port_ring_writer_ipv4_ras_tx_bulk(void *port,
+ struct rte_mbuf **pkts,
+ uint64_t pkts_mask)
+{
+ struct rte_port_ring_writer_ipv4_ras *p =
+ (struct rte_port_ring_writer_ipv4_ras *) port;
+
+ if ((pkts_mask & (pkts_mask + 1)) == 0) {
+ uint64_t n_pkts = __builtin_popcountll(pkts_mask);
+ uint32_t i;
+
+ for (i = 0; i < n_pkts; i++) {
+ struct rte_mbuf *pkt = pkts[i];
+
+ process_one(p, pkt);
+ if (p->tx_buf_count >= p->tx_burst_sz)
+ send_burst(p);
+ }
+ } else {
+ for ( ; pkts_mask; ) {
+ uint32_t pkt_index = __builtin_ctzll(pkts_mask);
+ uint64_t pkt_mask = 1LLU << pkt_index;
+ struct rte_mbuf *pkt = pkts[pkt_index];
+
+ process_one(p, pkt);
+ if (p->tx_buf_count >= p->tx_burst_sz)
+ send_burst(p);
+
+ pkts_mask &= ~pkt_mask;
+ }
+ }
+
+ return 0;
+}
+
+static int
+rte_port_ring_writer_ipv4_ras_flush(void *port)
+{
+ struct rte_port_ring_writer_ipv4_ras *p =
+ (struct rte_port_ring_writer_ipv4_ras *) port;
+
+ if (p->tx_buf_count > 0)
+ send_burst(p);
+
+ return 0;
+}
+
+static int
+rte_port_ring_writer_ipv4_ras_free(void *port)
+{
+ struct rte_port_ring_writer_ipv4_ras *p =
+ (struct rte_port_ring_writer_ipv4_ras *) port;
+
+ if (port == NULL) {
+ RTE_LOG(ERR, PORT, "%s: Parameter port is NULL\n", __func__);
+ return -1;
+ }
+
+ rte_port_ring_writer_ipv4_ras_flush(port);
+ rte_ip_frag_table_destroy(p->frag_tbl);
+ rte_free(port);
+
+ return 0;
+}
+
+/*
+ * Summary of port operations
+ */
+struct rte_port_out_ops rte_port_ring_writer_ipv4_ras_ops = {
+ .f_create = rte_port_ring_writer_ipv4_ras_create,
+ .f_free = rte_port_ring_writer_ipv4_ras_free,
+ .f_tx = rte_port_ring_writer_ipv4_ras_tx,
+ .f_tx_bulk = rte_port_ring_writer_ipv4_ras_tx_bulk,
+ .f_flush = rte_port_ring_writer_ipv4_ras_flush,
+};
--- /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_RAS_H__
+#define __INCLUDE_RTE_PORT_RAS_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @file
+ * RTE Port for IPv4 Reassembly
+ *
+ * This port is built on top of pre-initialized single producer rte_ring. In
+ * order to minimize the amount of packets stored in the ring at any given
+ * time, the IP reassembly functionality is executed on ring write operation,
+ * hence this port is implemented as an output port. A regular ring_reader port
+ * can be created to read from the same ring.
+ *
+ * The packets written to the ring are either complete IP datagrams or IP
+ * fragments. The packets read from the ring are all complete IP datagrams,
+ * either jumbo frames (i.e. IP packets with length bigger than MTU) or not.
+ * The complete IP datagrams written to the ring are not changed. The IP
+ * fragments written to the ring are first reassembled and into complete IP
+ * datagrams or dropped on error or IP reassembly time-out.
+ *
+ ***/
+
+#include <stdint.h>
+
+#include <rte_ring.h>
+
+#include "rte_port.h"
+
+/** ring_writer_ipv4_ras port parameters */
+struct rte_port_ring_writer_ipv4_ras_params {
+ /** Underlying single consumer ring that has to be pre-initialized. */
+ struct rte_ring *ring;
+
+ /** Recommended burst size to ring. The actual burst size can be bigger
+ or smaller than this value. */
+ uint32_t tx_burst_sz;
+};
+
+/** ring_writer_ipv4_ras port operations */
+extern struct rte_port_out_ops rte_port_ring_writer_ipv4_ras_ops;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
git.droids-corp.org / dpdk.git / commitdiff