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gcc/libgomp/oacc-mem.c
Jakub Jelinek 8d9254fc8a Update copyright years. 
From-SVN: r279813
2020-01-01 12:51:42 +01:00

1323 lines
32 KiB
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/* OpenACC Runtime initialization routines
Copyright (C) 2013-2020 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 "openacc.h"
#include "libgomp.h"
#include "gomp-constants.h"
#include "oacc-int.h"
#include <string.h>
#include <assert.h>
/* Return block containing [H->S), or NULL if not contained. The device lock
for DEV must be locked on entry, and remains locked on exit. */
static splay_tree_key
lookup_host (struct gomp_device_descr *dev, void *h, size_t s)
{
struct splay_tree_key_s node;
splay_tree_key key;
node.host_start = (uintptr_t) h;
node.host_end = (uintptr_t) h + s;
key = splay_tree_lookup (&dev->mem_map, &node);
return key;
}
/* Helper for lookup_dev. Iterate over splay tree. */
static splay_tree_key
lookup_dev_1 (splay_tree_node node, uintptr_t d, size_t s)
{
splay_tree_key key = &node->key;
if (d >= key->tgt->tgt_start && d + s <= key->tgt->tgt_end)
return key;
key = NULL;
if (node->left)
key = lookup_dev_1 (node->left, d, s);
if (!key && node->right)
key = lookup_dev_1 (node->right, d, s);
return key;
}
/* Return block containing [D->S), or NULL if not contained.
This iterates over the splay tree. This is not expected to be a common
operation.
The device lock associated with MEM_MAP must be locked on entry, and remains
locked on exit. */
static splay_tree_key
lookup_dev (splay_tree mem_map, void *d, size_t s)
{
if (!mem_map || !mem_map->root)
return NULL;
return lookup_dev_1 (mem_map->root, (uintptr_t) d, s);
}
/* OpenACC is silent on how memory exhaustion is indicated. We return
NULL. */
void *
acc_malloc (size_t s)
{
if (!s)
return NULL;
goacc_lazy_initialize ();
struct goacc_thread *thr = goacc_thread ();
assert (thr->dev);
if (thr->dev->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
return malloc (s);
acc_prof_info prof_info;
acc_api_info api_info;
bool profiling_p = GOACC_PROFILING_SETUP_P (thr, &prof_info, &api_info);
void *res = thr->dev->alloc_func (thr->dev->target_id, s);
if (profiling_p)
{
thr->prof_info = NULL;
thr->api_info = NULL;
}
return res;
}
void
acc_free (void *d)
{
splay_tree_key k;
if (!d)
return;
struct goacc_thread *thr = goacc_thread ();
assert (thr && thr->dev);
struct gomp_device_descr *acc_dev = thr->dev;
if (acc_dev->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
return free (d);
acc_prof_info prof_info;
acc_api_info api_info;
bool profiling_p = GOACC_PROFILING_SETUP_P (thr, &prof_info, &api_info);
gomp_mutex_lock (&acc_dev->lock);
/* We don't have to call lazy open here, as the ptr value must have
been returned by acc_malloc. It's not permitted to pass NULL in
(unless you got that null from acc_malloc). */
if ((k = lookup_dev (&acc_dev->mem_map, d, 1)))
{
void *offset = d - k->tgt->tgt_start + k->tgt_offset;
void *h = k->host_start + offset;
size_t h_size = k->host_end - k->host_start;
gomp_mutex_unlock (&acc_dev->lock);
/* PR92503 "[OpenACC] Behavior of 'acc_free' if the memory space is still
used in a mapping". */
gomp_fatal ("refusing to free device memory space at %p that is still"
" mapped at [%p,+%d]",
d, h, (int) h_size);
}
else
gomp_mutex_unlock (&acc_dev->lock);
if (!acc_dev->free_func (acc_dev->target_id, d))
gomp_fatal ("error in freeing device memory in %s", __FUNCTION__);
if (profiling_p)
{
thr->prof_info = NULL;
thr->api_info = NULL;
}
}
static void
memcpy_tofrom_device (bool from, void *d, void *h, size_t s, int async,
const char *libfnname)
{
/* No need to call lazy open here, as the device pointer must have
been obtained from a routine that did that. */
struct goacc_thread *thr = goacc_thread ();
assert (thr && thr->dev);
if (thr->dev->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
{
if (from)
memmove (h, d, s);
else
memmove (d, h, s);
return;
}
acc_prof_info prof_info;
acc_api_info api_info;
bool profiling_p = GOACC_PROFILING_SETUP_P (thr, &prof_info, &api_info);
if (profiling_p)
{
prof_info.async = async;
prof_info.async_queue = prof_info.async;
}
goacc_aq aq = get_goacc_asyncqueue (async);
if (from)
gomp_copy_dev2host (thr->dev, aq, h, d, s);
else
gomp_copy_host2dev (thr->dev, aq, d, h, s, /* TODO: cbuf? */ NULL);
if (profiling_p)
{
thr->prof_info = NULL;
thr->api_info = NULL;
}
}
void
acc_memcpy_to_device (void *d, void *h, size_t s)
{
memcpy_tofrom_device (false, d, h, s, acc_async_sync, __FUNCTION__);
}
void
acc_memcpy_to_device_async (void *d, void *h, size_t s, int async)
{
memcpy_tofrom_device (false, d, h, s, async, __FUNCTION__);
}
void
acc_memcpy_from_device (void *h, void *d, size_t s)
{
memcpy_tofrom_device (true, d, h, s, acc_async_sync, __FUNCTION__);
}
void
acc_memcpy_from_device_async (void *h, void *d, size_t s, int async)
{
memcpy_tofrom_device (true, d, h, s, async, __FUNCTION__);
}
/* Return the device pointer that corresponds to host data H. Or NULL
if no mapping. */
void *
acc_deviceptr (void *h)
{
splay_tree_key n;
void *d;
void *offset;
goacc_lazy_initialize ();
struct goacc_thread *thr = goacc_thread ();
struct gomp_device_descr *dev = thr->dev;
if (thr->dev->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
return h;
/* In the following, no OpenACC Profiling Interface events can possibly be
generated. */
gomp_mutex_lock (&dev->lock);
n = lookup_host (dev, h, 1);
if (!n)
{
gomp_mutex_unlock (&dev->lock);
return NULL;
}
offset = h - n->host_start;
d = n->tgt->tgt_start + n->tgt_offset + offset;
gomp_mutex_unlock (&dev->lock);
return d;
}
/* Return the host pointer that corresponds to device data D. Or NULL
if no mapping. */
void *
acc_hostptr (void *d)
{
splay_tree_key n;
void *h;
void *offset;
goacc_lazy_initialize ();
struct goacc_thread *thr = goacc_thread ();
struct gomp_device_descr *acc_dev = thr->dev;
if (thr->dev->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
return d;
/* In the following, no OpenACC Profiling Interface events can possibly be
generated. */
gomp_mutex_lock (&acc_dev->lock);
n = lookup_dev (&acc_dev->mem_map, d, 1);
if (!n)
{
gomp_mutex_unlock (&acc_dev->lock);
return NULL;
}
offset = d - n->tgt->tgt_start + n->tgt_offset;
h = n->host_start + offset;
gomp_mutex_unlock (&acc_dev->lock);
return h;
}
/* Return 1 if host data [H,+S] is present on the device. */
int
acc_is_present (void *h, size_t s)
{
splay_tree_key n;
if (!s || !h)
return 0;
goacc_lazy_initialize ();
struct goacc_thread *thr = goacc_thread ();
struct gomp_device_descr *acc_dev = thr->dev;
if (thr->dev->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
return h != NULL;
/* In the following, no OpenACC Profiling Interface events can possibly be
generated. */
gomp_mutex_lock (&acc_dev->lock);
n = lookup_host (acc_dev, h, s);
if (n && ((uintptr_t)h < n->host_start
|| (uintptr_t)h + s > n->host_end
|| s > n->host_end - n->host_start))
n = NULL;
gomp_mutex_unlock (&acc_dev->lock);
return n != NULL;
}
/* Create a mapping for host [H,+S] -> device [D,+S] */
void
acc_map_data (void *h, void *d, size_t s)
{
struct target_mem_desc *tgt = NULL;
size_t mapnum = 1;
void *hostaddrs = h;
void *devaddrs = d;
size_t sizes = s;
unsigned short kinds = GOMP_MAP_ALLOC;
goacc_lazy_initialize ();
struct goacc_thread *thr = goacc_thread ();
struct gomp_device_descr *acc_dev = thr->dev;
if (acc_dev->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
{
if (d != h)
gomp_fatal ("cannot map data on shared-memory system");
}
else
{
struct goacc_thread *thr = goacc_thread ();
if (!d || !h || !s)
gomp_fatal ("[%p,+%d]->[%p,+%d] is a bad map",
(void *)h, (int)s, (void *)d, (int)s);
acc_prof_info prof_info;
acc_api_info api_info;
bool profiling_p = GOACC_PROFILING_SETUP_P (thr, &prof_info, &api_info);
gomp_mutex_lock (&acc_dev->lock);
if (lookup_host (acc_dev, h, s))
{
gomp_mutex_unlock (&acc_dev->lock);
gomp_fatal ("host address [%p, +%d] is already mapped", (void *)h,
(int)s);
}
if (lookup_dev (&thr->dev->mem_map, d, s))
{
gomp_mutex_unlock (&acc_dev->lock);
gomp_fatal ("device address [%p, +%d] is already mapped", (void *)d,
(int)s);
}
gomp_mutex_unlock (&acc_dev->lock);
tgt = gomp_map_vars (acc_dev, mapnum, &hostaddrs, &devaddrs, &sizes,
&kinds, true, GOMP_MAP_VARS_ENTER_DATA);
assert (tgt);
splay_tree_key n = tgt->list[0].key;
assert (n->refcount == 1);
assert (n->virtual_refcount == 0);
/* Special reference counting behavior. */
n->refcount = REFCOUNT_INFINITY;
if (profiling_p)
{
thr->prof_info = NULL;
thr->api_info = NULL;
}
}
}
void
acc_unmap_data (void *h)
{
struct goacc_thread *thr = goacc_thread ();
struct gomp_device_descr *acc_dev = thr->dev;
/* No need to call lazy open, as the address must have been mapped. */
/* This is a no-op on shared-memory targets. */
if (acc_dev->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
return;
acc_prof_info prof_info;
acc_api_info api_info;
bool profiling_p = GOACC_PROFILING_SETUP_P (thr, &prof_info, &api_info);
gomp_mutex_lock (&acc_dev->lock);
splay_tree_key n = lookup_host (acc_dev, h, 1);
if (!n)
{
gomp_mutex_unlock (&acc_dev->lock);
gomp_fatal ("%p is not a mapped block", (void *)h);
}
size_t host_size = n->host_end - n->host_start;
if (n->host_start != (uintptr_t) h)
{
gomp_mutex_unlock (&acc_dev->lock);
gomp_fatal ("[%p,%d] surrounds %p",
(void *) n->host_start, (int) host_size, (void *) h);
}
/* TODO This currently doesn't catch 'REFCOUNT_INFINITY' usage different from
'acc_map_data'. Maybe 'virtual_refcount' can be used for disambiguating
the different 'REFCOUNT_INFINITY' cases, or simply separate
'REFCOUNT_INFINITY' values per different usage ('REFCOUNT_ACC_MAP_DATA'
etc.)? */
else if (n->refcount != REFCOUNT_INFINITY)
{
gomp_mutex_unlock (&acc_dev->lock);
gomp_fatal ("refusing to unmap block [%p,+%d] that has not been mapped"
" by 'acc_map_data'",
(void *) h, (int) host_size);
}
splay_tree_remove (&acc_dev->mem_map, n);
struct target_mem_desc *tgt = n->tgt;
if (tgt->refcount == REFCOUNT_INFINITY)
{
gomp_mutex_unlock (&acc_dev->lock);
gomp_fatal ("cannot unmap target block");
}
else if (tgt->refcount > 1)
tgt->refcount--;
else
{
free (tgt->array);
free (tgt);
}
gomp_mutex_unlock (&acc_dev->lock);
if (profiling_p)
{
thr->prof_info = NULL;
thr->api_info = NULL;
}
}
/* Enter dynamic mapping for a single datum. Return the device pointer. */
static void *
goacc_enter_datum (void **hostaddrs, size_t *sizes, void *kinds, int async)
{
void *d;
splay_tree_key n;
if (!hostaddrs[0] || !sizes[0])
gomp_fatal ("[%p,+%d] is a bad range", hostaddrs[0], (int) sizes[0]);
goacc_lazy_initialize ();
struct goacc_thread *thr = goacc_thread ();
struct gomp_device_descr *acc_dev = thr->dev;
if (acc_dev->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
return hostaddrs[0];
acc_prof_info prof_info;
acc_api_info api_info;
bool profiling_p = GOACC_PROFILING_SETUP_P (thr, &prof_info, &api_info);
if (profiling_p)
{
prof_info.async = async;
prof_info.async_queue = prof_info.async;
}
gomp_mutex_lock (&acc_dev->lock);
n = lookup_host (acc_dev, hostaddrs[0], sizes[0]);
if (n)
{
void *h = hostaddrs[0];
size_t s = sizes[0];
/* Present. */
d = (void *) (n->tgt->tgt_start + n->tgt_offset + h - n->host_start);
if ((h + s) > (void *)n->host_end)
{
gomp_mutex_unlock (&acc_dev->lock);
gomp_fatal ("[%p,+%d] not mapped", (void *)h, (int)s);
}
assert (n->refcount != REFCOUNT_LINK);
if (n->refcount != REFCOUNT_INFINITY)
{
n->refcount++;
n->virtual_refcount++;
}
gomp_mutex_unlock (&acc_dev->lock);
}
else
{
const size_t mapnum = 1;
gomp_mutex_unlock (&acc_dev->lock);
goacc_aq aq = get_goacc_asyncqueue (async);
gomp_map_vars_async (acc_dev, aq, mapnum, hostaddrs, NULL, sizes, kinds,
true, GOMP_MAP_VARS_OPENACC_ENTER_DATA);
gomp_mutex_lock (&acc_dev->lock);
n = lookup_host (acc_dev, hostaddrs[0], sizes[0]);
assert (n != NULL);
assert (n->tgt_offset == 0);
assert ((uintptr_t) hostaddrs[0] == n->host_start);
d = (void *) n->tgt->tgt_start;
gomp_mutex_unlock (&acc_dev->lock);
}
if (profiling_p)
{
thr->prof_info = NULL;
thr->api_info = NULL;
}
return d;
}
void *
acc_create (void *h, size_t s)
{
unsigned short kinds[1] = { GOMP_MAP_ALLOC };
return goacc_enter_datum (&h, &s, &kinds, acc_async_sync);
}
void
acc_create_async (void *h, size_t s, int async)
{
unsigned short kinds[1] = { GOMP_MAP_ALLOC };
goacc_enter_datum (&h, &s, &kinds, async);
}
/* acc_present_or_create used to be what acc_create is now. */
/* acc_pcreate is acc_present_or_create by a different name. */
#ifdef HAVE_ATTRIBUTE_ALIAS
strong_alias (acc_create, acc_present_or_create)
strong_alias (acc_create, acc_pcreate)
#else
void *
acc_present_or_create (void *h, size_t s)
{
return acc_create (h, s);
}
void *
acc_pcreate (void *h, size_t s)
{
return acc_create (h, s);
}
#endif
void *
acc_copyin (void *h, size_t s)
{
unsigned short kinds[1] = { GOMP_MAP_TO };
return goacc_enter_datum (&h, &s, &kinds, acc_async_sync);
}
void
acc_copyin_async (void *h, size_t s, int async)
{
unsigned short kinds[1] = { GOMP_MAP_TO };
goacc_enter_datum (&h, &s, &kinds, async);
}
/* acc_present_or_copyin used to be what acc_copyin is now. */
/* acc_pcopyin is acc_present_or_copyin by a different name. */
#ifdef HAVE_ATTRIBUTE_ALIAS
strong_alias (acc_copyin, acc_present_or_copyin)
strong_alias (acc_copyin, acc_pcopyin)
#else
void *
acc_present_or_copyin (void *h, size_t s)
{
return acc_copyin (h, s);
}
void *
acc_pcopyin (void *h, size_t s)
{
return acc_copyin (h, s);
}
#endif
/* Exit a dynamic mapping for a single variable. */
static void
goacc_exit_datum (void *h, size_t s, unsigned short kind, int async)
{
/* No need to call lazy open, as the data must already have been
mapped. */
kind &= 0xff;
struct goacc_thread *thr = goacc_thread ();
struct gomp_device_descr *acc_dev = thr->dev;
if (acc_dev->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
return;
acc_prof_info prof_info;
acc_api_info api_info;
bool profiling_p = GOACC_PROFILING_SETUP_P (thr, &prof_info, &api_info);
if (profiling_p)
{
prof_info.async = async;
prof_info.async_queue = prof_info.async;
}
gomp_mutex_lock (&acc_dev->lock);
splay_tree_key n = lookup_host (acc_dev, h, s);
if (!n)
/* PR92726, RP92970, PR92984: no-op. */
goto out;
if ((uintptr_t) h < n->host_start || (uintptr_t) h + s > n->host_end)
{
size_t host_size = n->host_end - n->host_start;
gomp_mutex_unlock (&acc_dev->lock);
gomp_fatal ("[%p,+%d] outside mapped block [%p,+%d]",
(void *) h, (int) s, (void *) n->host_start, (int) host_size);
}
bool finalize = (kind == GOMP_MAP_DELETE
|| kind == GOMP_MAP_FORCE_FROM);
if (finalize)
{
if (n->refcount != REFCOUNT_INFINITY)
n->refcount -= n->virtual_refcount;
n->virtual_refcount = 0;
}
if (n->virtual_refcount > 0)
{
if (n->refcount != REFCOUNT_INFINITY)
n->refcount--;
n->virtual_refcount--;
}
else if (n->refcount > 0 && n->refcount != REFCOUNT_INFINITY)
n->refcount--;
if (n->refcount == 0)
{
goacc_aq aq = get_goacc_asyncqueue (async);
bool copyout = (kind == GOMP_MAP_FROM
|| kind == GOMP_MAP_FORCE_FROM);
if (copyout)
{
void *d = (void *) (n->tgt->tgt_start + n->tgt_offset
+ (uintptr_t) h - n->host_start);
gomp_copy_dev2host (acc_dev, aq, h, d, s);
}
if (aq)
/* TODO We can't do the 'is_tgt_unmapped' checking -- see the
'gomp_unref_tgt' comment in
<http://mid.mail-archive.com/878snl36eu.fsf@euler.schwinge.homeip.net>;
PR92881. */
gomp_remove_var_async (acc_dev, n, aq);
else
{
bool is_tgt_unmapped = gomp_remove_var (acc_dev, n);
assert (is_tgt_unmapped);
}
}
out:
gomp_mutex_unlock (&acc_dev->lock);
if (profiling_p)
{
thr->prof_info = NULL;
thr->api_info = NULL;
}
}
void
acc_delete (void *h , size_t s)
{
goacc_exit_datum (h, s, GOMP_MAP_RELEASE, acc_async_sync);
}
void
acc_delete_async (void *h , size_t s, int async)
{
goacc_exit_datum (h, s, GOMP_MAP_RELEASE, async);
}
void
acc_delete_finalize (void *h , size_t s)
{
goacc_exit_datum (h, s, GOMP_MAP_DELETE, acc_async_sync);
}
void
acc_delete_finalize_async (void *h , size_t s, int async)
{
goacc_exit_datum (h, s, GOMP_MAP_DELETE, async);
}
void
acc_copyout (void *h, size_t s)
{
goacc_exit_datum (h, s, GOMP_MAP_FROM, acc_async_sync);
}
void
acc_copyout_async (void *h, size_t s, int async)
{
goacc_exit_datum (h, s, GOMP_MAP_FROM, async);
}
void
acc_copyout_finalize (void *h, size_t s)
{
goacc_exit_datum (h, s, GOMP_MAP_FORCE_FROM, acc_async_sync);
}
void
acc_copyout_finalize_async (void *h, size_t s, int async)
{
goacc_exit_datum (h, s, GOMP_MAP_FORCE_FROM, async);
}
static void
update_dev_host (int is_dev, void *h, size_t s, int async)
{
splay_tree_key n;
void *d;
goacc_lazy_initialize ();
struct goacc_thread *thr = goacc_thread ();
struct gomp_device_descr *acc_dev = thr->dev;
if (acc_dev->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
return;
/* Fortran optional arguments that are non-present result in a
NULL host address here. This can safely be ignored as it is
not possible to 'update' a non-present optional argument. */
if (h == NULL)
return;
acc_prof_info prof_info;
acc_api_info api_info;
bool profiling_p = GOACC_PROFILING_SETUP_P (thr, &prof_info, &api_info);
if (profiling_p)
{
prof_info.async = async;
prof_info.async_queue = prof_info.async;
}
gomp_mutex_lock (&acc_dev->lock);
n = lookup_host (acc_dev, h, s);
if (!n)
{
gomp_mutex_unlock (&acc_dev->lock);
gomp_fatal ("[%p,%d] is not mapped", h, (int)s);
}
d = (void *) (n->tgt->tgt_start + n->tgt_offset
+ (uintptr_t) h - n->host_start);
goacc_aq aq = get_goacc_asyncqueue (async);
if (is_dev)
gomp_copy_host2dev (acc_dev, aq, d, h, s, /* TODO: cbuf? */ NULL);
else
gomp_copy_dev2host (acc_dev, aq, h, d, s);
gomp_mutex_unlock (&acc_dev->lock);
if (profiling_p)
{
thr->prof_info = NULL;
thr->api_info = NULL;
}
}
void
acc_update_device (void *h, size_t s)
{
update_dev_host (1, h, s, acc_async_sync);
}
void
acc_update_device_async (void *h, size_t s, int async)
{
update_dev_host (1, h, s, async);
}
void
acc_update_self (void *h, size_t s)
{
update_dev_host (0, h, s, acc_async_sync);
}
void
acc_update_self_async (void *h, size_t s, int async)
{
update_dev_host (0, h, s, async);
}
void
acc_attach_async (void **hostaddr, int async)
{
struct goacc_thread *thr = goacc_thread ();
struct gomp_device_descr *acc_dev = thr->dev;
goacc_aq aq = get_goacc_asyncqueue (async);
struct splay_tree_key_s cur_node;
splay_tree_key n;
if (thr->dev->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
return;
gomp_mutex_lock (&acc_dev->lock);
cur_node.host_start = (uintptr_t) hostaddr;
cur_node.host_end = cur_node.host_start + sizeof (void *);
n = splay_tree_lookup (&acc_dev->mem_map, &cur_node);
if (n == NULL)
gomp_fatal ("struct not mapped for acc_attach");
gomp_attach_pointer (acc_dev, aq, &acc_dev->mem_map, n, (uintptr_t) hostaddr,
0, NULL);
gomp_mutex_unlock (&acc_dev->lock);
}
void
acc_attach (void **hostaddr)
{
acc_attach_async (hostaddr, acc_async_sync);
}
static void
goacc_detach_internal (void **hostaddr, int async, bool finalize)
{
struct goacc_thread *thr = goacc_thread ();
struct gomp_device_descr *acc_dev = thr->dev;
struct splay_tree_key_s cur_node;
splay_tree_key n;
struct goacc_asyncqueue *aq = get_goacc_asyncqueue (async);
if (thr->dev->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
return;
gomp_mutex_lock (&acc_dev->lock);
cur_node.host_start = (uintptr_t) hostaddr;
cur_node.host_end = cur_node.host_start + sizeof (void *);
n = splay_tree_lookup (&acc_dev->mem_map, &cur_node);
if (n == NULL)
gomp_fatal ("struct not mapped for acc_detach");
gomp_detach_pointer (acc_dev, aq, n, (uintptr_t) hostaddr, finalize, NULL);
gomp_mutex_unlock (&acc_dev->lock);
}
void
acc_detach (void **hostaddr)
{
goacc_detach_internal (hostaddr, acc_async_sync, false);
}
void
acc_detach_async (void **hostaddr, int async)
{
goacc_detach_internal (hostaddr, async, false);
}
void
acc_detach_finalize (void **hostaddr)
{
goacc_detach_internal (hostaddr, acc_async_sync, true);
}
void
acc_detach_finalize_async (void **hostaddr, int async)
{
goacc_detach_internal (hostaddr, async, true);
}
/* Some types of (pointer) variables use several consecutive mappings, which
must be treated as a group for enter/exit data directives. This function
returns the last mapping in such a group (inclusive), or POS for singleton
mappings. */
static int
find_group_last (int pos, size_t mapnum, size_t *sizes, unsigned short *kinds)
{
unsigned char kind0 = kinds[pos] & 0xff;
int first_pos = pos;
switch (kind0)
{
case GOMP_MAP_TO_PSET:
while (pos + 1 < mapnum && (kinds[pos + 1] & 0xff) == GOMP_MAP_POINTER)
pos++;
/* We expect at least one GOMP_MAP_POINTER after a GOMP_MAP_TO_PSET. */
assert (pos > first_pos);
break;
case GOMP_MAP_STRUCT:
pos += sizes[pos];
break;
case GOMP_MAP_POINTER:
case GOMP_MAP_ALWAYS_POINTER:
/* These mappings are only expected after some other mapping. If we
see one by itself, something has gone wrong. */
gomp_fatal ("unexpected mapping");
break;
default:
/* GOMP_MAP_ALWAYS_POINTER can only appear directly after some other
mapping. */
if (pos + 1 < mapnum)
{
unsigned char kind1 = kinds[pos + 1] & 0xff;
if (kind1 == GOMP_MAP_ALWAYS_POINTER)
return pos + 1;
}
/* We can have zero or more GOMP_MAP_POINTER mappings after a to/from
(etc.) mapping. */
while (pos + 1 < mapnum && (kinds[pos + 1] & 0xff) == GOMP_MAP_POINTER)
pos++;
}
return pos;
}
/* Map variables for OpenACC "enter data". We can't just call
gomp_map_vars_async once, because individual mapped variables might have
"exit data" called for them at different times. */
static void
goacc_enter_data_internal (struct gomp_device_descr *acc_dev, size_t mapnum,
void **hostaddrs, size_t *sizes,
unsigned short *kinds, goacc_aq aq)
{
for (size_t i = 0; i < mapnum; i++)
{
int group_last = find_group_last (i, mapnum, sizes, kinds);
gomp_map_vars_async (acc_dev, aq,
(group_last - i) + 1,
&hostaddrs[i], NULL,
&sizes[i], &kinds[i], true,
GOMP_MAP_VARS_OPENACC_ENTER_DATA);
i = group_last;
}
}
/* Unmap variables for OpenACC "exit data". */
static void
goacc_exit_data_internal (struct gomp_device_descr *acc_dev, size_t mapnum,
void **hostaddrs, size_t *sizes,
unsigned short *kinds, goacc_aq aq)
{
gomp_mutex_lock (&acc_dev->lock);
/* Handle "detach" before copyback/deletion of mapped data. */
for (size_t i = 0; i < mapnum; ++i)
{
unsigned char kind = kinds[i] & 0xff;
bool finalize = false;
switch (kind)
{
case GOMP_MAP_FORCE_DETACH:
finalize = true;
/* Fallthrough. */
case GOMP_MAP_DETACH:
{
struct splay_tree_key_s cur_node;
uintptr_t hostaddr = (uintptr_t) hostaddrs[i];
cur_node.host_start = hostaddr;
cur_node.host_end = cur_node.host_start + sizeof (void *);
splay_tree_key n
= splay_tree_lookup (&acc_dev->mem_map, &cur_node);
if (n == NULL)
gomp_fatal ("struct not mapped for detach operation");
gomp_detach_pointer (acc_dev, aq, n, hostaddr, finalize, NULL);
}
break;
default:
;
}
}
for (size_t i = 0; i < mapnum; ++i)
{
unsigned char kind = kinds[i] & 0xff;
bool copyfrom = false;
bool finalize = false;
if (kind == GOMP_MAP_FORCE_FROM
|| kind == GOMP_MAP_DELETE
|| kind == GOMP_MAP_FORCE_DETACH)
finalize = true;
switch (kind)
{
case GOMP_MAP_FROM:
case GOMP_MAP_FORCE_FROM:
case GOMP_MAP_ALWAYS_FROM:
copyfrom = true;
/* Fallthrough. */
case GOMP_MAP_TO_PSET:
case GOMP_MAP_POINTER:
case GOMP_MAP_DELETE:
case GOMP_MAP_RELEASE:
case GOMP_MAP_DETACH:
case GOMP_MAP_FORCE_DETACH:
{
struct splay_tree_key_s cur_node;
size_t size;
if (kind == GOMP_MAP_POINTER
|| kind == GOMP_MAP_DETACH
|| kind == GOMP_MAP_FORCE_DETACH)
size = sizeof (void *);
else
size = sizes[i];
cur_node.host_start = (uintptr_t) hostaddrs[i];
cur_node.host_end = cur_node.host_start + size;
splay_tree_key n
= splay_tree_lookup (&acc_dev->mem_map, &cur_node);
if (n == NULL)
continue;
if (finalize)
{
if (n->refcount != REFCOUNT_INFINITY)
n->refcount -= n->virtual_refcount;
n->virtual_refcount = 0;
}
if (n->virtual_refcount > 0)
{
if (n->refcount != REFCOUNT_INFINITY)
n->refcount--;
n->virtual_refcount--;
}
else if (n->refcount > 0 && n->refcount != REFCOUNT_INFINITY)
n->refcount--;
if (copyfrom
&& (kind != GOMP_MAP_FROM || n->refcount == 0))
gomp_copy_dev2host (acc_dev, aq, (void *) cur_node.host_start,
(void *) (n->tgt->tgt_start + n->tgt_offset
+ cur_node.host_start
- n->host_start),
cur_node.host_end - cur_node.host_start);
if (n->refcount == 0)
gomp_remove_var_async (acc_dev, n, aq);
}
break;
case GOMP_MAP_STRUCT:
{
int elems = sizes[i];
for (int j = 1; j <= elems; j++)
{
struct splay_tree_key_s k;
k.host_start = (uintptr_t) hostaddrs[i + j];
k.host_end = k.host_start + sizes[i + j];
splay_tree_key str;
str = splay_tree_lookup (&acc_dev->mem_map, &k);
if (str)
{
if (finalize)
{
if (str->refcount != REFCOUNT_INFINITY)
str->refcount -= str->virtual_refcount;
str->virtual_refcount = 0;
}
if (str->virtual_refcount > 0)
{
if (str->refcount != REFCOUNT_INFINITY)
str->refcount--;
str->virtual_refcount--;
}
else if (str->refcount > 0
&& str->refcount != REFCOUNT_INFINITY)
str->refcount--;
if (str->refcount == 0)
gomp_remove_var_async (acc_dev, str, aq);
}
}
i += elems;
}
break;
default:
gomp_fatal (">>>> goacc_exit_data_internal UNHANDLED kind 0x%.2x",
kind);
}
}
gomp_mutex_unlock (&acc_dev->lock);
}
void
GOACC_enter_exit_data (int flags_m, size_t mapnum, void **hostaddrs,
size_t *sizes, unsigned short *kinds, int async,
int num_waits, ...)
{
int flags = GOACC_FLAGS_UNMARSHAL (flags_m);
struct goacc_thread *thr;
struct gomp_device_descr *acc_dev;
bool data_enter = false;
size_t i;
goacc_lazy_initialize ();
thr = goacc_thread ();
acc_dev = thr->dev;
/* Determine if this is an "acc enter data". */
for (i = 0; i < mapnum; ++i)
{
unsigned char kind = kinds[i] & 0xff;
if (kind == GOMP_MAP_POINTER
|| kind == GOMP_MAP_TO_PSET
|| kind == GOMP_MAP_STRUCT)
continue;
if (kind == GOMP_MAP_FORCE_ALLOC
|| kind == GOMP_MAP_FORCE_PRESENT
|| kind == GOMP_MAP_ATTACH
|| kind == GOMP_MAP_FORCE_TO
|| kind == GOMP_MAP_TO
|| kind == GOMP_MAP_ALLOC)
{
data_enter = true;
break;
}
if (kind == GOMP_MAP_RELEASE
|| kind == GOMP_MAP_DELETE
|| kind == GOMP_MAP_DETACH
|| kind == GOMP_MAP_FORCE_DETACH
|| kind == GOMP_MAP_FROM
|| kind == GOMP_MAP_FORCE_FROM)
break;
gomp_fatal (">>>> GOACC_enter_exit_data UNHANDLED kind 0x%.2x",
kind);
}
bool profiling_p = GOACC_PROFILING_DISPATCH_P (true);
acc_prof_info prof_info;
if (profiling_p)
{
thr->prof_info = &prof_info;
prof_info.event_type
= data_enter ? acc_ev_enter_data_start : acc_ev_exit_data_start;
prof_info.valid_bytes = _ACC_PROF_INFO_VALID_BYTES;
prof_info.version = _ACC_PROF_INFO_VERSION;
prof_info.device_type = acc_device_type (acc_dev->type);
prof_info.device_number = acc_dev->target_id;
prof_info.thread_id = -1;
prof_info.async = async;
prof_info.async_queue = prof_info.async;
prof_info.src_file = NULL;
prof_info.func_name = NULL;
prof_info.line_no = -1;
prof_info.end_line_no = -1;
prof_info.func_line_no = -1;
prof_info.func_end_line_no = -1;
}
acc_event_info enter_exit_data_event_info;
if (profiling_p)
{
enter_exit_data_event_info.other_event.event_type
= prof_info.event_type;
enter_exit_data_event_info.other_event.valid_bytes
= _ACC_OTHER_EVENT_INFO_VALID_BYTES;
enter_exit_data_event_info.other_event.parent_construct
= data_enter ? acc_construct_enter_data : acc_construct_exit_data;
enter_exit_data_event_info.other_event.implicit = 0;
enter_exit_data_event_info.other_event.tool_info = NULL;
}
acc_api_info api_info;
if (profiling_p)
{
thr->api_info = &api_info;
api_info.device_api = acc_device_api_none;
api_info.valid_bytes = _ACC_API_INFO_VALID_BYTES;
api_info.device_type = prof_info.device_type;
api_info.vendor = -1;
api_info.device_handle = NULL;
api_info.context_handle = NULL;
api_info.async_handle = NULL;
}
if (profiling_p)
goacc_profiling_dispatch (&prof_info, &enter_exit_data_event_info,
&api_info);
if ((acc_dev->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
|| (flags & GOACC_FLAG_HOST_FALLBACK))
{
prof_info.device_type = acc_device_host;
api_info.device_type = prof_info.device_type;
goto out_prof;
}
if (num_waits)
{
va_list ap;
va_start (ap, num_waits);
goacc_wait (async, num_waits, &ap);
va_end (ap);
}
goacc_aq aq = get_goacc_asyncqueue (async);
if (data_enter)
goacc_enter_data_internal (acc_dev, mapnum, hostaddrs, sizes, kinds, aq);
else
goacc_exit_data_internal (acc_dev, mapnum, hostaddrs, sizes, kinds, aq);
out_prof:
if (profiling_p)
{
prof_info.event_type
= data_enter ? acc_ev_enter_data_end : acc_ev_exit_data_end;
enter_exit_data_event_info.other_event.event_type = prof_info.event_type;
goacc_profiling_dispatch (&prof_info, &enter_exit_data_event_info,
&api_info);
thr->prof_info = NULL;
thr->api_info = NULL;
}
}
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