libgomp/oacc-cuda.c

   1 /* OpenACC Runtime Library: CUDA support glue.
   2
   3    Copyright (C) 2014-2021 Free Software Foundation, Inc.
   4
   5    Contributed by Mentor Embedded.
   6
   7    This file is part of the GNU Offloading and Multi Processing Library
   8    (libgomp).
   9
  10    Libgomp is free software; you can redistribute it and/or modify it
  11    under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3, or (at your option)
  13    any later version.
  14
  15    Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
  16    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  17    FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  18    more details.
  19
  20    Under Section 7 of GPL version 3, you are granted additional
  21    permissions described in the GCC Runtime Library Exception, version
  22    3.1, as published by the Free Software Foundation.
  23
  24    You should have received a copy of the GNU General Public License and
  25    a copy of the GCC Runtime Library Exception along with this program;
  26    see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  27    <http://www.gnu.org/licenses/>.  */
  28
  29 #include "openacc.h"
  30 #include "libgomp.h"
  31 #include "oacc-int.h"
  32 #include <assert.h>
  33
  34 void *
  35 acc_get_current_cuda_device (void)
  36 {
  37   struct goacc_thread *thr = goacc_thread ();
  38
  39   void *ret = NULL;
  40   if (thr && thr->dev && thr->dev->openacc.cuda.get_current_device_func)
  41     {
  42       acc_prof_info prof_info;
  43       acc_api_info api_info;
  44       bool profiling_p = GOACC_PROFILING_SETUP_P (thr, &prof_info, &api_info);
  45
  46       ret = thr->dev->openacc.cuda.get_current_device_func ();
  47
  48       if (profiling_p)
  49         {
  50           thr->prof_info = NULL;
  51           thr->api_info = NULL;
  52         }
  53     }
  54
  55   return ret;
  56 }
  57
  58 void *
  59 acc_get_current_cuda_context (void)
  60 {
  61   struct goacc_thread *thr = goacc_thread ();
  62
  63   void *ret = NULL;
  64   if (thr && thr->dev && thr->dev->openacc.cuda.get_current_context_func)
  65     {
  66       acc_prof_info prof_info;
  67       acc_api_info api_info;
  68       bool profiling_p = GOACC_PROFILING_SETUP_P (thr, &prof_info, &api_info);
  69
  70       ret = thr->dev->openacc.cuda.get_current_context_func ();
  71
  72       if (profiling_p)
  73         {
  74           thr->prof_info = NULL;
  75           thr->api_info = NULL;
  76         }
  77     }
  78
  79   return ret;
  80 }
  81
  82 void *
  83 acc_get_cuda_stream (int async)
  84 {
  85   struct goacc_thread *thr = goacc_thread ();
  86
  87   if (!async_valid_p (async))
  88     return NULL;
  89
  90   void *ret = NULL;
  91   if (thr && thr->dev && thr->dev->openacc.cuda.get_stream_func)
  92     {
  93       goacc_aq aq = lookup_goacc_asyncqueue (thr, false, async);
  94       if (!aq)
  95         return ret;
  96
  97       acc_prof_info prof_info;
  98       acc_api_info api_info;
  99       bool profiling_p = GOACC_PROFILING_SETUP_P (thr, &prof_info, &api_info);
 100       if (profiling_p)
 101         {
 102           prof_info.async = async;
 103           prof_info.async_queue = prof_info.async;
 104         }
 105
 106       ret = thr->dev->openacc.cuda.get_stream_func (aq);
 107
 108       if (profiling_p)
 109         {
 110           thr->prof_info = NULL;
 111           thr->api_info = NULL;
 112         }
 113     }
 114
 115   return ret;
 116 }
 117
 118 int
 119 acc_set_cuda_stream (int async, void *stream)
 120 {
 121   struct goacc_thread *thr;
 122
 123   if (!async_valid_p (async) || stream == NULL)
 124     return 0;
 125
 126   goacc_lazy_initialize ();
 127
 128   thr = goacc_thread ();
 129
 130   int ret = -1;
 131   if (thr && thr->dev && thr->dev->openacc.cuda.set_stream_func)
 132     {
 133       acc_prof_info prof_info;
 134       acc_api_info api_info;
 135       bool profiling_p = GOACC_PROFILING_SETUP_P (thr, &prof_info, &api_info);
 136       if (profiling_p)
 137         {
 138           prof_info.async = async;
 139           prof_info.async_queue = prof_info.async;
 140         }
 141
 142       goacc_aq aq = get_goacc_asyncqueue (async);
 143       /* Due to not using an asyncqueue for "acc_async_sync", this cannot be
 144          used to change the CUDA stream associated with "acc_async_sync".  */
 145       if (!aq)
 146         {
 147           assert (async == acc_async_sync);
 148           gomp_debug (0, "Refusing request to set CUDA stream associated"
 149                       " with \"acc_async_sync\"\n");
 150           ret = 0;
 151           goto out_prof;
 152         }
 153       gomp_mutex_lock (&thr->dev->openacc.async.lock);
 154       ret = thr->dev->openacc.cuda.set_stream_func (aq, stream);
 155       gomp_mutex_unlock (&thr->dev->openacc.async.lock);
 156
 157     out_prof:
 158       if (profiling_p)
 159         {
 160           thr->prof_info = NULL;
 161           thr->api_info = NULL;
 162         }
 163     }
 164
 165   return ret;
 166 }