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