ceph/src/dpdk/examples/quota_watermark/qw/init.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <fcntl.h>
  35 #include <unistd.h>
  36 #include <sys/mman.h>
  37
  38 #include <rte_eal.h>
  39
  40 #include <rte_common.h>
  41 #include <rte_errno.h>
  42 #include <rte_ethdev.h>
  43 #include <rte_memzone.h>
  44 #include <rte_ring.h>
  45 #include <rte_string_fns.h>
  46
  47 #include "args.h"
  48 #include "init.h"
  49 #include "main.h"
  50 #include "../include/conf.h"
  51
  52
  53 static const struct rte_eth_conf port_conf = {
  54         .rxmode = {
  55                 .split_hdr_size = 0,
  56                 .header_split   = 0, /**< Header Split disabled */
  57                 .hw_ip_checksum = 0, /**< IP checksum offload disabled */
  58                 .hw_vlan_filter = 0, /**< VLAN filtering disabled */
  59                 .jumbo_frame    = 0, /**< Jumbo Frame Support disabled */
  60                 .hw_strip_crc   = 0, /**< CRC stripped by hardware */
  61         },
  62         .txmode = {
  63                 .mq_mode = ETH_DCB_NONE,
  64         },
  65 };
  66
  67 static struct rte_eth_fc_conf fc_conf = {
  68     .mode       = RTE_FC_TX_PAUSE,
  69     .high_water = 80 * 510 / 100,
  70     .low_water  = 60 * 510 / 100,
  71     .pause_time = 1337,
  72     .send_xon   = 0,
  73 };
  74
  75
  76 void configure_eth_port(uint8_t port_id)
  77 {
  78     int ret;
  79
  80     rte_eth_dev_stop(port_id);
  81
  82     ret = rte_eth_dev_configure(port_id, 1, 1, &port_conf);
  83     if (ret < 0)
  84         rte_exit(EXIT_FAILURE, "Cannot configure port %u (error %d)\n",
  85                                (unsigned) port_id, ret);
  86
  87     /* Initialize the port's RX queue */
  88     ret = rte_eth_rx_queue_setup(port_id, 0, RX_DESC_PER_QUEUE,
  89                                 rte_eth_dev_socket_id(port_id),
  90                                 NULL,
  91                                 mbuf_pool);
  92     if (ret < 0)
  93         rte_exit(EXIT_FAILURE, "Failed to setup RX queue on "
  94                                "port %u (error %d)\n", (unsigned) port_id, ret);
  95
  96     /* Initialize the port's TX queue */
  97     ret = rte_eth_tx_queue_setup(port_id, 0, TX_DESC_PER_QUEUE,
  98                                 rte_eth_dev_socket_id(port_id),
  99                                 NULL);
 100     if (ret < 0)
 101         rte_exit(EXIT_FAILURE, "Failed to setup TX queue on "
 102                                "port %u (error %d)\n", (unsigned) port_id, ret);
 103
 104     /* Initialize the port's flow control */
 105     ret = rte_eth_dev_flow_ctrl_set(port_id, &fc_conf);
 106     if (ret < 0)
 107         rte_exit(EXIT_FAILURE, "Failed to setup hardware flow control on "
 108                                "port %u (error %d)\n", (unsigned) port_id, ret);
 109
 110     /* Start the port */
 111     ret = rte_eth_dev_start(port_id);
 112     if (ret < 0)
 113         rte_exit(EXIT_FAILURE, "Failed to start port %u (error %d)\n",
 114                                (unsigned) port_id, ret);
 115
 116     /* Put it in promiscuous mode */
 117     rte_eth_promiscuous_enable(port_id);
 118 }
 119
 120 void
 121 init_dpdk(void)
 122 {
 123     if (rte_eth_dev_count() < 2)
 124         rte_exit(EXIT_FAILURE, "Not enough ethernet port available\n");
 125 }
 126
 127 void init_ring(int lcore_id, uint8_t port_id)
 128 {
 129     struct rte_ring *ring;
 130     char ring_name[RTE_RING_NAMESIZE];
 131
 132     snprintf(ring_name, RTE_RING_NAMESIZE,
 133                 "core%d_port%d", lcore_id, port_id);
 134     ring = rte_ring_create(ring_name, RING_SIZE, rte_socket_id(),
 135                            RING_F_SP_ENQ | RING_F_SC_DEQ);
 136
 137     if (ring == NULL)
 138         rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 139
 140     rte_ring_set_water_mark(ring, 80 * RING_SIZE / 100);
 141
 142     rings[lcore_id][port_id] = ring;
 143 }
 144
 145 void
 146 pair_ports(void)
 147 {
 148     uint8_t i, j;
 149
 150     /* Pair ports with their "closest neighbour" in the portmask */
 151     for (i = 0; i < RTE_MAX_ETHPORTS; i++)
 152         if (is_bit_set(i, portmask))
 153             for (j = (uint8_t) (i + 1); j < RTE_MAX_ETHPORTS; j++)
 154                 if (is_bit_set(j, portmask)) {
 155                     port_pairs[i] = j;
 156                     port_pairs[j] = i;
 157                     i = j;
 158                     break;
 159                 }
 160 }
 161
 162 void
 163 setup_shared_variables(void)
 164 {
 165     const struct rte_memzone *qw_memzone;
 166
 167     qw_memzone = rte_memzone_reserve(QUOTA_WATERMARK_MEMZONE_NAME, 2 * sizeof(int),
 168                                      rte_socket_id(), RTE_MEMZONE_2MB);
 169     if (qw_memzone == NULL)
 170         rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 171
 172     quota = qw_memzone->addr;
 173     low_watermark = (unsigned int *) qw_memzone->addr + 1;
 174 }