602 lines
15 KiB
C
602 lines
15 KiB
C
/* Copyright (C) 2013-2016 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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/* This file handles OpenACC constructs. */
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#include "openacc.h"
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#include "libgomp.h"
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#include "libgomp_g.h"
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#include "gomp-constants.h"
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#include "oacc-int.h"
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#ifdef HAVE_INTTYPES_H
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# include <inttypes.h> /* For PRIu64. */
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#endif
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#include <string.h>
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#include <stdarg.h>
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#include <assert.h>
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static int
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find_pset (int pos, size_t mapnum, unsigned short *kinds)
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{
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if (pos + 1 >= mapnum)
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return 0;
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unsigned char kind = kinds[pos+1] & 0xff;
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return kind == GOMP_MAP_TO_PSET;
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}
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static void goacc_wait (int async, int num_waits, va_list *ap);
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/* Launch a possibly offloaded function on DEVICE. FN is the host fn
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address. MAPNUM, HOSTADDRS, SIZES & KINDS describe the memory
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blocks to be copied to/from the device. Varadic arguments are
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keyed optional parameters terminated with a zero. */
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void
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GOACC_parallel_keyed (int device, void (*fn) (void *),
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size_t mapnum, void **hostaddrs, size_t *sizes,
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unsigned short *kinds, ...)
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{
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bool host_fallback = device == GOMP_DEVICE_HOST_FALLBACK;
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va_list ap;
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struct goacc_thread *thr;
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struct gomp_device_descr *acc_dev;
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struct target_mem_desc *tgt;
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void **devaddrs;
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unsigned int i;
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struct splay_tree_key_s k;
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splay_tree_key tgt_fn_key;
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void (*tgt_fn);
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int async = GOMP_ASYNC_SYNC;
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unsigned dims[GOMP_DIM_MAX];
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unsigned tag;
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#ifdef HAVE_INTTYPES_H
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gomp_debug (0, "%s: mapnum=%"PRIu64", hostaddrs=%p, size=%p, kinds=%p\n",
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__FUNCTION__, (uint64_t) mapnum, hostaddrs, sizes, kinds);
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#else
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gomp_debug (0, "%s: mapnum=%lu, hostaddrs=%p, sizes=%p, kinds=%p\n",
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__FUNCTION__, (unsigned long) mapnum, hostaddrs, sizes, kinds);
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#endif
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goacc_lazy_initialize ();
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thr = goacc_thread ();
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acc_dev = thr->dev;
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/* Host fallback if "if" clause is false or if the current device is set to
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the host. */
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if (host_fallback)
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{
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goacc_save_and_set_bind (acc_device_host);
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fn (hostaddrs);
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goacc_restore_bind ();
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return;
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}
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else if (acc_device_type (acc_dev->type) == acc_device_host)
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{
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fn (hostaddrs);
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return;
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}
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va_start (ap, kinds);
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/* TODO: This will need amending when device_type is implemented. */
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while ((tag = va_arg (ap, unsigned)) != 0)
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{
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if (GOMP_LAUNCH_DEVICE (tag))
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gomp_fatal ("device_type '%d' offload parameters, libgomp is too old",
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GOMP_LAUNCH_DEVICE (tag));
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switch (GOMP_LAUNCH_CODE (tag))
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{
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case GOMP_LAUNCH_DIM:
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{
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unsigned mask = GOMP_LAUNCH_OP (tag);
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for (i = 0; i != GOMP_DIM_MAX; i++)
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if (mask & GOMP_DIM_MASK (i))
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dims[i] = va_arg (ap, unsigned);
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}
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break;
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case GOMP_LAUNCH_ASYNC:
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{
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/* Small constant values are encoded in the operand. */
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async = GOMP_LAUNCH_OP (tag);
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if (async == GOMP_LAUNCH_OP_MAX)
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async = va_arg (ap, unsigned);
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break;
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}
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case GOMP_LAUNCH_WAIT:
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{
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unsigned num_waits = GOMP_LAUNCH_OP (tag);
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if (num_waits)
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goacc_wait (async, num_waits, &ap);
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break;
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}
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default:
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gomp_fatal ("unrecognized offload code '%d',"
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" libgomp is too old", GOMP_LAUNCH_CODE (tag));
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}
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}
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va_end (ap);
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acc_dev->openacc.async_set_async_func (async);
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if (!(acc_dev->capabilities & GOMP_OFFLOAD_CAP_NATIVE_EXEC))
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{
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k.host_start = (uintptr_t) fn;
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k.host_end = k.host_start + 1;
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gomp_mutex_lock (&acc_dev->lock);
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tgt_fn_key = splay_tree_lookup (&acc_dev->mem_map, &k);
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gomp_mutex_unlock (&acc_dev->lock);
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if (tgt_fn_key == NULL)
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gomp_fatal ("target function wasn't mapped");
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tgt_fn = (void (*)) tgt_fn_key->tgt_offset;
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}
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else
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tgt_fn = (void (*)) fn;
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tgt = gomp_map_vars (acc_dev, mapnum, hostaddrs, NULL, sizes, kinds, true,
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GOMP_MAP_VARS_OPENACC);
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devaddrs = gomp_alloca (sizeof (void *) * mapnum);
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for (i = 0; i < mapnum; i++)
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devaddrs[i] = (void *) (tgt->list[i].key->tgt->tgt_start
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+ tgt->list[i].key->tgt_offset);
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acc_dev->openacc.exec_func (tgt_fn, mapnum, hostaddrs, devaddrs,
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async, dims, tgt);
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/* If running synchronously, unmap immediately. */
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if (async < acc_async_noval)
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gomp_unmap_vars (tgt, true);
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else
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{
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gomp_copy_from_async (tgt);
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acc_dev->openacc.register_async_cleanup_func (tgt);
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}
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acc_dev->openacc.async_set_async_func (acc_async_sync);
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}
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/* Legacy entry point, only provide host execution. */
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void
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GOACC_parallel (int device, void (*fn) (void *),
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size_t mapnum, void **hostaddrs, size_t *sizes,
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unsigned short *kinds,
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int num_gangs, int num_workers, int vector_length,
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int async, int num_waits, ...)
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{
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goacc_save_and_set_bind (acc_device_host);
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fn (hostaddrs);
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goacc_restore_bind ();
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}
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void
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GOACC_data_start (int device, size_t mapnum,
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void **hostaddrs, size_t *sizes, unsigned short *kinds)
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{
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bool host_fallback = device == GOMP_DEVICE_HOST_FALLBACK;
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struct target_mem_desc *tgt;
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#ifdef HAVE_INTTYPES_H
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gomp_debug (0, "%s: mapnum=%"PRIu64", hostaddrs=%p, size=%p, kinds=%p\n",
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__FUNCTION__, (uint64_t) mapnum, hostaddrs, sizes, kinds);
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#else
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gomp_debug (0, "%s: mapnum=%lu, hostaddrs=%p, sizes=%p, kinds=%p\n",
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__FUNCTION__, (unsigned long) mapnum, hostaddrs, sizes, kinds);
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#endif
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goacc_lazy_initialize ();
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struct goacc_thread *thr = goacc_thread ();
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struct gomp_device_descr *acc_dev = thr->dev;
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/* Host fallback or 'do nothing'. */
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if ((acc_dev->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
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|| host_fallback)
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{
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tgt = gomp_map_vars (NULL, 0, NULL, NULL, NULL, NULL, true,
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GOMP_MAP_VARS_OPENACC);
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tgt->prev = thr->mapped_data;
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thr->mapped_data = tgt;
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return;
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}
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gomp_debug (0, " %s: prepare mappings\n", __FUNCTION__);
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tgt = gomp_map_vars (acc_dev, mapnum, hostaddrs, NULL, sizes, kinds, true,
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GOMP_MAP_VARS_OPENACC);
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gomp_debug (0, " %s: mappings prepared\n", __FUNCTION__);
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tgt->prev = thr->mapped_data;
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thr->mapped_data = tgt;
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}
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void
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GOACC_data_end (void)
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{
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struct goacc_thread *thr = goacc_thread ();
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struct target_mem_desc *tgt = thr->mapped_data;
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gomp_debug (0, " %s: restore mappings\n", __FUNCTION__);
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thr->mapped_data = tgt->prev;
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gomp_unmap_vars (tgt, true);
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gomp_debug (0, " %s: mappings restored\n", __FUNCTION__);
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}
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void
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GOACC_enter_exit_data (int device, size_t mapnum,
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void **hostaddrs, size_t *sizes, unsigned short *kinds,
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int async, int num_waits, ...)
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{
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struct goacc_thread *thr;
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struct gomp_device_descr *acc_dev;
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bool host_fallback = device == GOMP_DEVICE_HOST_FALLBACK;
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bool data_enter = false;
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size_t i;
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goacc_lazy_initialize ();
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thr = goacc_thread ();
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acc_dev = thr->dev;
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if ((acc_dev->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
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|| host_fallback)
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return;
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if (num_waits)
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{
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va_list ap;
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va_start (ap, num_waits);
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goacc_wait (async, num_waits, &ap);
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va_end (ap);
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}
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acc_dev->openacc.async_set_async_func (async);
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/* Determine if this is an "acc enter data". */
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for (i = 0; i < mapnum; ++i)
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{
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unsigned char kind = kinds[i] & 0xff;
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if (kind == GOMP_MAP_POINTER || kind == GOMP_MAP_TO_PSET)
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continue;
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if (kind == GOMP_MAP_FORCE_ALLOC
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|| kind == GOMP_MAP_FORCE_PRESENT
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|| kind == GOMP_MAP_FORCE_TO)
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{
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data_enter = true;
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break;
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}
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if (kind == GOMP_MAP_FORCE_DEALLOC
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|| kind == GOMP_MAP_FORCE_FROM)
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break;
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gomp_fatal (">>>> GOACC_enter_exit_data UNHANDLED kind 0x%.2x",
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kind);
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}
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if (data_enter)
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{
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for (i = 0; i < mapnum; i++)
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{
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unsigned char kind = kinds[i] & 0xff;
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/* Scan for PSETs. */
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int psets = find_pset (i, mapnum, kinds);
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if (!psets)
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{
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switch (kind)
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{
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case GOMP_MAP_POINTER:
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gomp_acc_insert_pointer (1, &hostaddrs[i], &sizes[i],
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&kinds[i]);
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break;
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case GOMP_MAP_FORCE_ALLOC:
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acc_create (hostaddrs[i], sizes[i]);
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break;
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case GOMP_MAP_FORCE_PRESENT:
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acc_present_or_copyin (hostaddrs[i], sizes[i]);
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break;
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case GOMP_MAP_FORCE_TO:
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acc_present_or_copyin (hostaddrs[i], sizes[i]);
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break;
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default:
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gomp_fatal (">>>> GOACC_enter_exit_data UNHANDLED kind 0x%.2x",
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kind);
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break;
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}
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}
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else
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{
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gomp_acc_insert_pointer (3, &hostaddrs[i], &sizes[i], &kinds[i]);
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/* Increment 'i' by two because OpenACC requires fortran
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arrays to be contiguous, so each PSET is associated with
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one of MAP_FORCE_ALLOC/MAP_FORCE_PRESET/MAP_FORCE_TO, and
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one MAP_POINTER. */
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i += 2;
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}
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}
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}
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else
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for (i = 0; i < mapnum; ++i)
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{
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unsigned char kind = kinds[i] & 0xff;
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int psets = find_pset (i, mapnum, kinds);
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if (!psets)
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{
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switch (kind)
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{
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case GOMP_MAP_POINTER:
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gomp_acc_remove_pointer (hostaddrs[i], (kinds[i] & 0xff)
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== GOMP_MAP_FORCE_FROM,
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async, 1);
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break;
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case GOMP_MAP_FORCE_DEALLOC:
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acc_delete (hostaddrs[i], sizes[i]);
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break;
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case GOMP_MAP_FORCE_FROM:
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acc_copyout (hostaddrs[i], sizes[i]);
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break;
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default:
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gomp_fatal (">>>> GOACC_enter_exit_data UNHANDLED kind 0x%.2x",
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kind);
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break;
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}
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}
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else
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{
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gomp_acc_remove_pointer (hostaddrs[i], (kinds[i] & 0xff)
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== GOMP_MAP_FORCE_FROM, async, 3);
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/* See the above comment. */
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i += 2;
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}
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}
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acc_dev->openacc.async_set_async_func (acc_async_sync);
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}
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static void
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goacc_wait (int async, int num_waits, va_list *ap)
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{
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struct goacc_thread *thr = goacc_thread ();
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struct gomp_device_descr *acc_dev = thr->dev;
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while (num_waits--)
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{
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int qid = va_arg (*ap, int);
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if (acc_async_test (qid))
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continue;
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if (async == acc_async_sync)
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acc_wait (qid);
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else if (qid == async)
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;/* If we're waiting on the same asynchronous queue as we're
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launching on, the queue itself will order work as
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required, so there's no need to wait explicitly. */
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else
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acc_dev->openacc.async_wait_async_func (qid, async);
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}
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}
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void
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GOACC_update (int device, size_t mapnum,
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void **hostaddrs, size_t *sizes, unsigned short *kinds,
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int async, int num_waits, ...)
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{
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bool host_fallback = device == GOMP_DEVICE_HOST_FALLBACK;
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size_t i;
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goacc_lazy_initialize ();
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struct goacc_thread *thr = goacc_thread ();
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struct gomp_device_descr *acc_dev = thr->dev;
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if ((acc_dev->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
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|| host_fallback)
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return;
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if (num_waits)
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{
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va_list ap;
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va_start (ap, num_waits);
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goacc_wait (async, num_waits, &ap);
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va_end (ap);
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}
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acc_dev->openacc.async_set_async_func (async);
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for (i = 0; i < mapnum; ++i)
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{
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unsigned char kind = kinds[i] & 0xff;
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switch (kind)
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{
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case GOMP_MAP_POINTER:
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case GOMP_MAP_TO_PSET:
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break;
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case GOMP_MAP_FORCE_TO:
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acc_update_device (hostaddrs[i], sizes[i]);
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break;
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case GOMP_MAP_FORCE_FROM:
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acc_update_self (hostaddrs[i], sizes[i]);
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break;
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default:
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gomp_fatal (">>>> GOACC_update UNHANDLED kind 0x%.2x", kind);
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break;
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}
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}
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acc_dev->openacc.async_set_async_func (acc_async_sync);
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}
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void
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GOACC_wait (int async, int num_waits, ...)
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{
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if (num_waits)
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{
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va_list ap;
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va_start (ap, num_waits);
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goacc_wait (async, num_waits, &ap);
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va_end (ap);
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}
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else if (async == acc_async_sync)
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acc_wait_all ();
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else if (async == acc_async_noval)
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goacc_thread ()->dev->openacc.async_wait_all_async_func (acc_async_noval);
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}
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void
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GOACC_host_data (int device, size_t mapnum,
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void **hostaddrs, size_t *sizes, unsigned short *kinds)
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{
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bool host_fallback = device == GOMP_DEVICE_HOST_FALLBACK;
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struct target_mem_desc *tgt;
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#ifdef HAVE_INTTYPES_H
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gomp_debug (0, "%s: mapnum=%"PRIu64", hostaddrs=%p, size=%p, kinds=%p\n",
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__FUNCTION__, (uint64_t) mapnum, hostaddrs, sizes, kinds);
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#else
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gomp_debug (0, "%s: mapnum=%lu, hostaddrs=%p, sizes=%p, kinds=%p\n",
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__FUNCTION__, (unsigned long) mapnum, hostaddrs, sizes, kinds);
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#endif
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goacc_lazy_initialize ();
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struct goacc_thread *thr = goacc_thread ();
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struct gomp_device_descr *acc_dev = thr->dev;
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/* Host fallback or 'do nothing'. */
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if ((acc_dev->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
|
|
|| host_fallback)
|
|
{
|
|
tgt = gomp_map_vars (NULL, 0, NULL, NULL, NULL, NULL, true,
|
|
GOMP_MAP_VARS_OPENACC);
|
|
tgt->prev = thr->mapped_data;
|
|
thr->mapped_data = tgt;
|
|
|
|
return;
|
|
}
|
|
|
|
gomp_debug (0, " %s: prepare mappings\n", __FUNCTION__);
|
|
tgt = gomp_map_vars (acc_dev, mapnum, hostaddrs, NULL, sizes, kinds, true,
|
|
GOMP_MAP_VARS_OPENACC);
|
|
gomp_debug (0, " %s: mappings prepared\n", __FUNCTION__);
|
|
tgt->prev = thr->mapped_data;
|
|
thr->mapped_data = tgt;
|
|
}
|
|
|
|
int
|
|
GOACC_get_num_threads (void)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
GOACC_get_thread_num (void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
GOACC_declare (int device, size_t mapnum,
|
|
void **hostaddrs, size_t *sizes, unsigned short *kinds)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < mapnum; i++)
|
|
{
|
|
unsigned char kind = kinds[i] & 0xff;
|
|
|
|
if (kind == GOMP_MAP_POINTER || kind == GOMP_MAP_TO_PSET)
|
|
continue;
|
|
|
|
switch (kind)
|
|
{
|
|
case GOMP_MAP_FORCE_ALLOC:
|
|
case GOMP_MAP_FORCE_DEALLOC:
|
|
case GOMP_MAP_FORCE_FROM:
|
|
case GOMP_MAP_FORCE_TO:
|
|
case GOMP_MAP_POINTER:
|
|
GOACC_enter_exit_data (device, 1, &hostaddrs[i], &sizes[i],
|
|
&kinds[i], 0, 0);
|
|
break;
|
|
|
|
case GOMP_MAP_FORCE_DEVICEPTR:
|
|
break;
|
|
|
|
case GOMP_MAP_ALLOC:
|
|
if (!acc_is_present (hostaddrs[i], sizes[i]))
|
|
GOACC_enter_exit_data (device, 1, &hostaddrs[i], &sizes[i],
|
|
&kinds[i], 0, 0);
|
|
break;
|
|
|
|
case GOMP_MAP_TO:
|
|
GOACC_enter_exit_data (device, 1, &hostaddrs[i], &sizes[i],
|
|
&kinds[i], 0, 0);
|
|
|
|
break;
|
|
|
|
case GOMP_MAP_FROM:
|
|
kinds[i] = GOMP_MAP_FORCE_FROM;
|
|
GOACC_enter_exit_data (device, 1, &hostaddrs[i], &sizes[i],
|
|
&kinds[i], 0, 0);
|
|
break;
|
|
|
|
case GOMP_MAP_FORCE_PRESENT:
|
|
if (!acc_is_present (hostaddrs[i], sizes[i]))
|
|
gomp_fatal ("[%p,%ld] is not mapped", hostaddrs[i],
|
|
(unsigned long) sizes[i]);
|
|
break;
|
|
|
|
default:
|
|
assert (0);
|
|
break;
|
|
}
|
|
}
|
|
}
|