325 lines
7.8 KiB
C
325 lines
7.8 KiB
C
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/* OpenACC Runtime Library: acc_device_host.
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Copyright (C) 2013-2022 Free Software Foundation, Inc.
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Contributed by Mentor Embedded.
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This file is part of the GNU Offloading and Multi Processing Library
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(libgomp).
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Libgomp is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "libgomp.h"
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#include "oacc-int.h"
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#include "gomp-constants.h"
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#include <stdbool.h>
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#include <stddef.h>
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static struct gomp_device_descr host_dispatch;
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static const char *
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host_get_name (void)
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{
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return host_dispatch.name;
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}
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static unsigned int
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host_get_caps (void)
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{
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return host_dispatch.capabilities;
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}
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static int
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host_get_type (void)
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{
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return host_dispatch.type;
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}
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static int
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host_get_num_devices (void)
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{
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return 1;
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}
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static bool
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host_init_device (int n __attribute__ ((unused)))
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{
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return true;
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}
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static bool
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host_fini_device (int n __attribute__ ((unused)))
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{
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return true;
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}
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static unsigned
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host_version (void)
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{
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return GOMP_VERSION;
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}
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static int
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host_load_image (int n __attribute__ ((unused)),
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unsigned v __attribute__ ((unused)),
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const void *t __attribute__ ((unused)),
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struct addr_pair **r __attribute__ ((unused)))
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{
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return 0;
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}
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static bool
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host_unload_image (int n __attribute__ ((unused)),
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unsigned v __attribute__ ((unused)),
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const void *t __attribute__ ((unused)))
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{
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return true;
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}
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static void *
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host_alloc (int n __attribute__ ((unused)), size_t s)
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{
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return gomp_malloc (s);
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}
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static bool
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host_free (int n __attribute__ ((unused)), void *p)
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{
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free (p);
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return true;
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}
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static bool
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host_dev2host (int n __attribute__ ((unused)),
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void *h __attribute__ ((unused)),
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const void *d __attribute__ ((unused)),
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size_t s __attribute__ ((unused)))
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{
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return true;
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}
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static bool
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host_host2dev (int n __attribute__ ((unused)),
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void *d __attribute__ ((unused)),
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const void *h __attribute__ ((unused)),
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size_t s __attribute__ ((unused)))
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{
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return true;
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}
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static void
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host_run (int n __attribute__ ((unused)), void *fn_ptr, void *vars,
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void **args __attribute__((unused)))
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{
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void (*fn)(void *) = (void (*)(void *)) fn_ptr;
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fn (vars);
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}
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static void
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host_openacc_exec (void (*fn) (void *),
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size_t mapnum __attribute__ ((unused)),
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void **hostaddrs,
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void **devaddrs __attribute__ ((unused)),
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unsigned *dims __attribute__ ((unused)),
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void *targ_mem_desc __attribute__ ((unused)))
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{
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fn (hostaddrs);
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}
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static void
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host_openacc_async_exec (void (*fn) (void *),
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size_t mapnum __attribute__ ((unused)),
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void **hostaddrs,
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void **devaddrs __attribute__ ((unused)),
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unsigned *dims __attribute__ ((unused)),
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void *targ_mem_desc __attribute__ ((unused)),
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struct goacc_asyncqueue *aq __attribute__ ((unused)))
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{
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fn (hostaddrs);
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}
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static int
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host_openacc_async_test (struct goacc_asyncqueue *aq __attribute__ ((unused)))
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{
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return 1;
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}
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static bool
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host_openacc_async_synchronize (struct goacc_asyncqueue *aq
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__attribute__ ((unused)))
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{
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return true;
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}
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static bool
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host_openacc_async_serialize (struct goacc_asyncqueue *aq1
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__attribute__ ((unused)),
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struct goacc_asyncqueue *aq2
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__attribute__ ((unused)))
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{
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return true;
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}
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static bool
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host_openacc_async_host2dev (int ord __attribute__ ((unused)),
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void *dst __attribute__ ((unused)),
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const void *src __attribute__ ((unused)),
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size_t n __attribute__ ((unused)),
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struct goacc_asyncqueue *aq
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__attribute__ ((unused)))
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{
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return true;
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}
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static bool
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host_openacc_async_dev2host (int ord __attribute__ ((unused)),
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void *dst __attribute__ ((unused)),
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const void *src __attribute__ ((unused)),
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size_t n __attribute__ ((unused)),
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struct goacc_asyncqueue *aq
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__attribute__ ((unused)))
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{
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return true;
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}
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static void
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host_openacc_async_queue_callback (struct goacc_asyncqueue *aq
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__attribute__ ((unused)),
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void (*callback_fn)(void *)
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__attribute__ ((unused)),
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void *userptr __attribute__ ((unused)))
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{
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}
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static struct goacc_asyncqueue *
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host_openacc_async_construct (int device __attribute__((unused)))
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{
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/* Non-NULL 0xffff... value as opaque dummy. */
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return (struct goacc_asyncqueue *) -1;
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}
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static bool
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host_openacc_async_destruct (struct goacc_asyncqueue *aq
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__attribute__ ((unused)))
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{
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return true;
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}
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static union goacc_property_value
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host_openacc_get_property (int n, enum goacc_property prop)
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{
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union goacc_property_value nullval = { .val = 0 };
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if (n >= host_get_num_devices ())
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return nullval;
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switch (prop)
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{
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case GOACC_PROPERTY_NAME:
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return (union goacc_property_value) { .ptr = "GOMP" };
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case GOACC_PROPERTY_VENDOR:
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return (union goacc_property_value) { .ptr = "GNU" };
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case GOACC_PROPERTY_DRIVER:
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return (union goacc_property_value) { .ptr = VERSION };
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case GOACC_PROPERTY_MEMORY:
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case GOACC_PROPERTY_FREE_MEMORY:
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default:
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return nullval;
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}
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}
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static void *
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host_openacc_create_thread_data (int ord __attribute__ ((unused)))
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{
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return NULL;
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}
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static void
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host_openacc_destroy_thread_data (void *tls_data __attribute__ ((unused)))
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{
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}
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static struct gomp_device_descr host_dispatch =
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{
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.name = "host",
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.capabilities = (GOMP_OFFLOAD_CAP_SHARED_MEM
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| GOMP_OFFLOAD_CAP_NATIVE_EXEC
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| GOMP_OFFLOAD_CAP_OPENACC_200),
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.target_id = 0,
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.type = OFFLOAD_TARGET_TYPE_HOST,
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.get_name_func = host_get_name,
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.get_caps_func = host_get_caps,
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.get_type_func = host_get_type,
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.get_num_devices_func = host_get_num_devices,
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.init_device_func = host_init_device,
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.fini_device_func = host_fini_device,
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.version_func = host_version,
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.load_image_func = host_load_image,
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.unload_image_func = host_unload_image,
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.alloc_func = host_alloc,
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.free_func = host_free,
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.dev2host_func = host_dev2host,
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.host2dev_func = host_host2dev,
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.run_func = host_run,
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.mem_map = { NULL },
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/* .lock initialized in goacc_host_init. */
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.state = GOMP_DEVICE_UNINITIALIZED,
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.openacc = {
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.exec_func = host_openacc_exec,
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.create_thread_data_func = host_openacc_create_thread_data,
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.destroy_thread_data_func = host_openacc_destroy_thread_data,
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.async = {
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.construct_func = host_openacc_async_construct,
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.destruct_func = host_openacc_async_destruct,
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.test_func = host_openacc_async_test,
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.synchronize_func = host_openacc_async_synchronize,
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.serialize_func = host_openacc_async_serialize,
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.queue_callback_func = host_openacc_async_queue_callback,
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.exec_func = host_openacc_async_exec,
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.dev2host_func = host_openacc_async_dev2host,
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.host2dev_func = host_openacc_async_host2dev,
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},
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.get_property_func = host_openacc_get_property,
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.cuda = {
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.get_current_device_func = NULL,
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.get_current_context_func = NULL,
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.get_stream_func = NULL,
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.set_stream_func = NULL,
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}
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}
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};
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/* Initialize and register this device type. */
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void
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goacc_host_init (void)
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{
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gomp_mutex_init (&host_dispatch.lock);
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goacc_register (&host_dispatch);
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}
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