ceph/src/spdk/lib/env_dpdk/threads.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright (c) Intel Corporation.
   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 "env_internal.h"
  35
  36 #include <rte_config.h>
  37 #include <rte_lcore.h>
  38
  39 uint32_t
  40 spdk_env_get_core_count(void)
  41 {
  42         return rte_lcore_count();
  43 }
  44
  45 uint32_t
  46 spdk_env_get_current_core(void)
  47 {
  48         return rte_lcore_id();
  49 }
  50
  51 uint32_t
  52 spdk_env_get_first_core(void)
  53 {
  54         return rte_get_next_lcore(-1, 0, 0);
  55 }
  56
  57 uint32_t
  58 spdk_env_get_last_core(void)
  59 {
  60         uint32_t i;
  61         uint32_t last_core = UINT32_MAX;
  62
  63         SPDK_ENV_FOREACH_CORE(i) {
  64                 last_core = i;
  65         }
  66
  67         assert(last_core != UINT32_MAX);
  68
  69         return last_core;
  70 }
  71
  72 uint32_t
  73 spdk_env_get_next_core(uint32_t prev_core)
  74 {
  75         unsigned lcore;
  76
  77         lcore = rte_get_next_lcore(prev_core, 0, 0);
  78         if (lcore == RTE_MAX_LCORE) {
  79                 return UINT32_MAX;
  80         }
  81         return lcore;
  82 }
  83
  84 uint32_t
  85 spdk_env_get_socket_id(uint32_t core)
  86 {
  87         if (core >= RTE_MAX_LCORE) {
  88                 return SPDK_ENV_SOCKET_ID_ANY;
  89         }
  90
  91         return rte_lcore_to_socket_id(core);
  92 }
  93
  94 int
  95 spdk_env_thread_launch_pinned(uint32_t core, thread_start_fn fn, void *arg)
  96 {
  97         int rc;
  98
  99         rc = rte_eal_remote_launch(fn, arg, core);
 100
 101         return rc;
 102 }
 103
 104 void
 105 spdk_env_thread_wait_all(void)
 106 {
 107         rte_eal_mp_wait_lcore();
 108 }