ceph/src/seastar/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 csum offload disabled */
  58                         .hw_vlan_filter = 0, /**< VLAN filtering disabled */
  59                         .jumbo_frame    = 0, /**< Jumbo Frame disabled */
  60                         .hw_strip_crc   = 1, /**< 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 int) 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,
  94                                 "Failed to setup RX queue on port %u (error %d)\n",
  95                                 (unsigned int) port_id, ret);
  96
  97         /* Initialize the port's TX queue */
  98         ret = rte_eth_tx_queue_setup(port_id, 0, TX_DESC_PER_QUEUE,
  99                         rte_eth_dev_socket_id(port_id),
 100                         NULL);
 101         if (ret < 0)
 102                 rte_exit(EXIT_FAILURE,
 103                                 "Failed to setup TX queue on port %u (error %d)\n",
 104                                 (unsigned int) port_id, ret);
 105
 106         /* Initialize the port's flow control */
 107         ret = rte_eth_dev_flow_ctrl_set(port_id, &fc_conf);
 108         if (ret < 0)
 109                 rte_exit(EXIT_FAILURE,
 110                                 "Failed to setup hardware flow control on port %u (error %d)\n",
 111                                 (unsigned int) port_id, ret);
 112
 113         /* Start the port */
 114         ret = rte_eth_dev_start(port_id);
 115         if (ret < 0)
 116                 rte_exit(EXIT_FAILURE, "Failed to start port %u (error %d)\n",
 117                                 (unsigned int) port_id, ret);
 118
 119         /* Put it in promiscuous mode */
 120         rte_eth_promiscuous_enable(port_id);
 121 }
 122
 123 void
 124 init_dpdk(void)
 125 {
 126         if (rte_eth_dev_count() < 2)
 127                 rte_exit(EXIT_FAILURE, "Not enough ethernet port available\n");
 128 }
 129
 130 void init_ring(int lcore_id, uint8_t port_id)
 131 {
 132         struct rte_ring *ring;
 133         char ring_name[RTE_RING_NAMESIZE];
 134
 135         snprintf(ring_name, RTE_RING_NAMESIZE,
 136                         "core%d_port%d", lcore_id, port_id);
 137         ring = rte_ring_create(ring_name, RING_SIZE, rte_socket_id(),
 138                         RING_F_SP_ENQ | RING_F_SC_DEQ);
 139
 140         if (ring == NULL)
 141                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 142
 143         *high_watermark = 80 * RING_SIZE / 100;
 144
 145         rings[lcore_id][port_id] = ring;
 146 }
 147
 148 void
 149 pair_ports(void)
 150 {
 151         uint8_t i, j;
 152
 153         /* Pair ports with their "closest neighbour" in the portmask */
 154         for (i = 0; i < RTE_MAX_ETHPORTS; i++)
 155                 if (is_bit_set(i, portmask))
 156                         for (j = (uint8_t) (i + 1); j < RTE_MAX_ETHPORTS; j++)
 157                                 if (is_bit_set(j, portmask)) {
 158                                         port_pairs[i] = j;
 159                                         port_pairs[j] = i;
 160                                         i = j;
 161                                         break;
 162                                 }
 163 }
 164
 165 void
 166 setup_shared_variables(void)
 167 {
 168         const struct rte_memzone *qw_memzone;
 169
 170         qw_memzone = rte_memzone_reserve(QUOTA_WATERMARK_MEMZONE_NAME,
 171                         3 * sizeof(int), rte_socket_id(), 0);
 172         if (qw_memzone == NULL)
 173                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
 174
 175         quota = qw_memzone->addr;
 176         low_watermark = (unsigned int *) qw_memzone->addr + 1;
 177         high_watermark = (unsigned int *) qw_memzone->addr + 2;
 178 }