--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2016 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 <stdint.h>
+#include <stdio.h>
+#include <inttypes.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <sys/queue.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <string.h>
+
+#include <rte_common.h>
+#include <rte_malloc.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_eal.h>
+#include <rte_atomic.h>
+#include <rte_branch_prediction.h>
+#include <rte_log.h>
+#include <rte_per_lcore.h>
+#include <rte_launch.h>
+#include <rte_lcore.h>
+#include <rte_ring.h>
+#include <rte_launch.h>
+#include <rte_lcore.h>
+#include <rte_debug.h>
+#include <rte_mempool.h>
+#include <rte_mbuf.h>
+#include <rte_interrupts.h>
+#include <rte_pci.h>
+#include <rte_ether.h>
+#include <rte_ethdev.h>
+#include <rte_string_fns.h>
+
+#include "common.h"
+
+/* Number of packets to attempt to read from queue */
+#define PKT_READ_SIZE ((uint16_t)32)
+
+/* our client id number - tells us which rx queue to read, and NIC TX
+ * queue to write to. */
+static uint8_t client_id = 0;
+
+#define MBQ_CAPACITY 32
+
+/* maps input ports to output ports for packets */
+static uint8_t output_ports[RTE_MAX_ETHPORTS];
+
+/* buffers up a set of packet that are ready to send */
+struct rte_eth_dev_tx_buffer *tx_buffer[RTE_MAX_ETHPORTS];
+
+/* shared data from server. We update statistics here */
+static volatile struct tx_stats *tx_stats;
+
+
+/*
+ * print a usage message
+ */
+static void
+usage(const char *progname)
+{
+ printf("Usage: %s [EAL args] -- -n <client_id>\n\n", progname);
+}
+
+/*
+ * Convert the client id number from a string to an int.
+ */
+static int
+parse_client_num(const char *client)
+{
+ char *end = NULL;
+ unsigned long temp;
+
+ if (client == NULL || *client == '\0')
+ return -1;
+
+ temp = strtoul(client, &end, 10);
+ if (end == NULL || *end != '\0')
+ return -1;
+
+ client_id = (uint8_t)temp;
+ return 0;
+}
+
+/*
+ * Parse the application arguments to the client app.
+ */
+static int
+parse_app_args(int argc, char *argv[])
+{
+ int option_index, opt;
+ char **argvopt = argv;
+ const char *progname = NULL;
+ static struct option lgopts[] = { /* no long options */
+ {NULL, 0, 0, 0 }
+ };
+ progname = argv[0];
+
+ while ((opt = getopt_long(argc, argvopt, "n:", lgopts,
+ &option_index)) != EOF){
+ switch (opt){
+ case 'n':
+ if (parse_client_num(optarg) != 0){
+ usage(progname);
+ return -1;
+ }
+ break;
+ default:
+ usage(progname);
+ return -1;
+ }
+ }
+ return 0;
+}
+
+/*
+ * Tx buffer error callback
+ */
+static void
+flush_tx_error_callback(struct rte_mbuf **unsent, uint16_t count,
+ void *userdata) {
+ int i;
+ uint8_t port_id = (uintptr_t)userdata;
+
+ tx_stats->tx_drop[port_id] += count;
+
+ /* free the mbufs which failed from transmit */
+ for (i = 0; i < count; i++)
+ rte_pktmbuf_free(unsent[i]);
+
+}
+
+static void
+configure_tx_buffer(uint8_t port_id, uint16_t size)
+{
+ int ret;
+
+ /* Initialize TX buffers */
+ tx_buffer[port_id] = rte_zmalloc_socket("tx_buffer",
+ RTE_ETH_TX_BUFFER_SIZE(size), 0,
+ rte_eth_dev_socket_id(port_id));
+ if (tx_buffer[port_id] == NULL)
+ rte_exit(EXIT_FAILURE, "Cannot allocate buffer for tx on port %u\n",
+ (unsigned) port_id);
+
+ rte_eth_tx_buffer_init(tx_buffer[port_id], size);
+
+ ret = rte_eth_tx_buffer_set_err_callback(tx_buffer[port_id],
+ flush_tx_error_callback, (void *)(intptr_t)port_id);
+ if (ret < 0)
+ rte_exit(EXIT_FAILURE, "Cannot set error callback for "
+ "tx buffer on port %u\n", (unsigned) port_id);
+}
+
+/*
+ * set up output ports so that all traffic on port gets sent out
+ * its paired port. Index using actual port numbers since that is
+ * what comes in the mbuf structure.
+ */
+static void
+configure_output_ports(const struct port_info *ports)
+{
+ int i;
+ if (ports->num_ports > RTE_MAX_ETHPORTS)
+ rte_exit(EXIT_FAILURE, "Too many ethernet ports. RTE_MAX_ETHPORTS = %u\n",
+ (unsigned)RTE_MAX_ETHPORTS);
+ for (i = 0; i < ports->num_ports - 1; i+=2){
+ uint8_t p1 = ports->id[i];
+ uint8_t p2 = ports->id[i+1];
+ output_ports[p1] = p2;
+ output_ports[p2] = p1;
+
+ configure_tx_buffer(p1, MBQ_CAPACITY);
+ configure_tx_buffer(p2, MBQ_CAPACITY);
+
+ }
+}
+
+/*
+ * This function performs routing of packets
+ * Just sends each input packet out an output port based solely on the input
+ * port it arrived on.
+ */
+static void
+handle_packet(struct rte_mbuf *buf)
+{
+ int sent;
+ const uint8_t in_port = buf->port;
+ const uint8_t out_port = output_ports[in_port];
+ struct rte_eth_dev_tx_buffer *buffer = tx_buffer[out_port];
+
+ sent = rte_eth_tx_buffer(out_port, client_id, buffer, buf);
+ if (sent)
+ tx_stats->tx[out_port] += sent;
+
+}
+
+/*
+ * Application main function - loops through
+ * receiving and processing packets. Never returns
+ */
+int
+main(int argc, char *argv[])
+{
+ const struct rte_memzone *mz;
+ struct rte_ring *rx_ring;
+ struct rte_mempool *mp;
+ struct port_info *ports;
+ int need_flush = 0; /* indicates whether we have unsent packets */
+ int retval;
+ void *pkts[PKT_READ_SIZE];
+ uint16_t sent;
+
+ if ((retval = rte_eal_init(argc, argv)) < 0)
+ return -1;
+ argc -= retval;
+ argv += retval;
+
+ if (parse_app_args(argc, argv) < 0)
+ rte_exit(EXIT_FAILURE, "Invalid command-line arguments\n");
+
+ if (rte_eth_dev_count() == 0)
+ rte_exit(EXIT_FAILURE, "No Ethernet ports - bye\n");
+
+ rx_ring = rte_ring_lookup(get_rx_queue_name(client_id));
+ if (rx_ring == NULL)
+ rte_exit(EXIT_FAILURE, "Cannot get RX ring - is server process running?\n");
+
+ mp = rte_mempool_lookup(PKTMBUF_POOL_NAME);
+ if (mp == NULL)
+ rte_exit(EXIT_FAILURE, "Cannot get mempool for mbufs\n");
+
+ mz = rte_memzone_lookup(MZ_PORT_INFO);
+ if (mz == NULL)
+ rte_exit(EXIT_FAILURE, "Cannot get port info structure\n");
+ ports = mz->addr;
+ tx_stats = &(ports->tx_stats[client_id]);
+
+ configure_output_ports(ports);
+
+ RTE_LOG(INFO, APP, "Finished Process Init.\n");
+
+ printf("\nClient process %d handling packets\n", client_id);
+ printf("[Press Ctrl-C to quit ...]\n");
+
+ for (;;) {
+ uint16_t i, rx_pkts = PKT_READ_SIZE;
+ uint8_t port;
+
+ /* try dequeuing max possible packets first, if that fails, get the
+ * most we can. Loop body should only execute once, maximum */
+ while (rx_pkts > 0 &&
+ unlikely(rte_ring_dequeue_bulk(rx_ring, pkts, rx_pkts) != 0))
+ rx_pkts = (uint16_t)RTE_MIN(rte_ring_count(rx_ring), PKT_READ_SIZE);
+
+ if (unlikely(rx_pkts == 0)){
+ if (need_flush)
+ for (port = 0; port < ports->num_ports; port++) {
+ sent = rte_eth_tx_buffer_flush(ports->id[port], client_id,
+ tx_buffer[port]);
+ if (unlikely(sent))
+ tx_stats->tx[port] += sent;
+ }
+ need_flush = 0;
+ continue;
+ }
+
+ for (i = 0; i < rx_pkts; i++)
+ handle_packet(pkts[i]);
+
+ need_flush = 1;
+ }
+}
Code Review / deb_dpdk.git / blobdiff