ceph/src/spdk/dpdk/lib/librte_eal/freebsd/eal/eal_timer.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4 #include <string.h>
   5 #include <stdio.h>
   6 #include <unistd.h>
   7 #include <inttypes.h>
   8 #include <sys/types.h>
   9 #include <sys/sysctl.h>
  10 #include <errno.h>
  11
  12 #include <rte_common.h>
  13 #include <rte_log.h>
  14 #include <rte_cycles.h>
  15 #include <rte_memory.h>
  16 #include <rte_eal.h>
  17 #include <rte_debug.h>
  18
  19 #include "eal_private.h"
  20 #include "eal_internal_cfg.h"
  21
  22 #ifdef RTE_LIBEAL_USE_HPET
  23 #warning HPET is not supported in FreeBSD
  24 #endif
  25
  26 enum timer_source eal_timer_source = EAL_TIMER_TSC;
  27
  28 uint64_t
  29 get_tsc_freq(void)
  30 {
  31         size_t sz;
  32         int tmp;
  33         uint64_t tsc_hz;
  34
  35         sz = sizeof(tmp);
  36         tmp = 0;
  37
  38         if (sysctlbyname("kern.timecounter.smp_tsc", &tmp, &sz, NULL, 0))
  39                 RTE_LOG(WARNING, EAL, "%s\n", strerror(errno));
  40         else if (tmp != 1)
  41                 RTE_LOG(WARNING, EAL, "TSC is not safe to use in SMP mode\n");
  42
  43         tmp = 0;
  44
  45         if (sysctlbyname("kern.timecounter.invariant_tsc", &tmp, &sz, NULL, 0))
  46                 RTE_LOG(WARNING, EAL, "%s\n", strerror(errno));
  47         else if (tmp != 1)
  48                 RTE_LOG(WARNING, EAL, "TSC is not invariant\n");
  49
  50         sz = sizeof(tsc_hz);
  51         if (sysctlbyname("machdep.tsc_freq", &tsc_hz, &sz, NULL, 0)) {
  52                 RTE_LOG(WARNING, EAL, "%s\n", strerror(errno));
  53                 return 0;
  54         }
  55
  56         return tsc_hz;
  57 }
  58
  59 int
  60 rte_eal_timer_init(void)
  61 {
  62         set_tsc_freq();
  63         return 0;
  64 }