blob: 4a4e1f8074565c32f94a2ee01d674531df772091 [file] [log] [blame]
/* Copyright (C) 2013-2021 Free Software Foundation, Inc.
Contributed by Jakub Jelinek <jakub@redhat.com>.
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/>. */
/* This file contains the support of offloading. */
#include "libgomp.h"
#include "oacc-plugin.h"
#include "oacc-int.h"
#include "gomp-constants.h"
#include <limits.h>
#include <stdbool.h>
#include <stdlib.h>
#ifdef HAVE_INTTYPES_H
# include <inttypes.h> /* For PRIu64. */
#endif
#include <string.h>
#include <assert.h>
#include <errno.h>
#ifdef PLUGIN_SUPPORT
#include <dlfcn.h>
#include "plugin-suffix.h"
#endif
#define FIELD_TGT_EMPTY (~(size_t) 0)
static void gomp_target_init (void);
/* The whole initialization code for offloading plugins is only run one. */
static pthread_once_t gomp_is_initialized = PTHREAD_ONCE_INIT;
/* Mutex for offload image registration. */
static gomp_mutex_t register_lock;
/* This structure describes an offload image.
It contains type of the target device, pointer to host table descriptor, and
pointer to target data. */
struct offload_image_descr {
unsigned version;
enum offload_target_type type;
const void *host_table;
const void *target_data;
};
/* Array of descriptors of offload images. */
static struct offload_image_descr *offload_images;
/* Total number of offload images. */
static int num_offload_images;
/* Array of descriptors for all available devices. */
static struct gomp_device_descr *devices;
/* Total number of available devices. */
static int num_devices;
/* Number of GOMP_OFFLOAD_CAP_OPENMP_400 devices. */
static int num_devices_openmp;
/* Similar to gomp_realloc, but release register_lock before gomp_fatal. */
static void *
gomp_realloc_unlock (void *old, size_t size)
{
void *ret = realloc (old, size);
if (ret == NULL)
{
gomp_mutex_unlock (&register_lock);
gomp_fatal ("Out of memory allocating %lu bytes", (unsigned long) size);
}
return ret;
}
attribute_hidden void
gomp_init_targets_once (void)
{
(void) pthread_once (&gomp_is_initialized, gomp_target_init);
}
attribute_hidden int
gomp_get_num_devices (void)
{
gomp_init_targets_once ();
return num_devices_openmp;
}
static struct gomp_device_descr *
resolve_device (int device_id)
{
if (device_id == GOMP_DEVICE_ICV)
{
struct gomp_task_icv *icv = gomp_icv (false);
device_id = icv->default_device_var;
}
if (device_id < 0 || device_id >= gomp_get_num_devices ())
{
if (gomp_target_offload_var == GOMP_TARGET_OFFLOAD_MANDATORY
&& device_id != GOMP_DEVICE_HOST_FALLBACK
&& device_id != num_devices_openmp)
gomp_fatal ("OMP_TARGET_OFFLOAD is set to MANDATORY, "
"but device not found");
return NULL;
}
gomp_mutex_lock (&devices[device_id].lock);
if (devices[device_id].state == GOMP_DEVICE_UNINITIALIZED)
gomp_init_device (&devices[device_id]);
else if (devices[device_id].state == GOMP_DEVICE_FINALIZED)
{
gomp_mutex_unlock (&devices[device_id].lock);
if (gomp_target_offload_var == GOMP_TARGET_OFFLOAD_MANDATORY)
gomp_fatal ("OMP_TARGET_OFFLOAD is set to MANDATORY, "
"but device is finalized");
return NULL;
}
gomp_mutex_unlock (&devices[device_id].lock);
return &devices[device_id];
}
static inline splay_tree_key
gomp_map_lookup (splay_tree mem_map, splay_tree_key key)
{
if (key->host_start != key->host_end)
return splay_tree_lookup (mem_map, key);
key->host_end++;
splay_tree_key n = splay_tree_lookup (mem_map, key);
key->host_end--;
if (n)
return n;
key->host_start--;
n = splay_tree_lookup (mem_map, key);
key->host_start++;
if (n)
return n;
return splay_tree_lookup (mem_map, key);
}
static inline splay_tree_key
gomp_map_0len_lookup (splay_tree mem_map, splay_tree_key key)
{
if (key->host_start != key->host_end)
return splay_tree_lookup (mem_map, key);
key->host_end++;
splay_tree_key n = splay_tree_lookup (mem_map, key);
key->host_end--;
return n;
}
static inline void
gomp_device_copy (struct gomp_device_descr *devicep,
bool (*copy_func) (int, void *, const void *, size_t),
const char *dst, void *dstaddr,
const char *src, const void *srcaddr,
size_t size)
{
if (!copy_func (devicep->target_id, dstaddr, srcaddr, size))
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("Copying of %s object [%p..%p) to %s object [%p..%p) failed",
src, srcaddr, srcaddr + size, dst, dstaddr, dstaddr + size);
}
}
static inline void
goacc_device_copy_async (struct gomp_device_descr *devicep,
bool (*copy_func) (int, void *, const void *, size_t,
struct goacc_asyncqueue *),
const char *dst, void *dstaddr,
const char *src, const void *srcaddr,
size_t size, struct goacc_asyncqueue *aq)
{
if (!copy_func (devicep->target_id, dstaddr, srcaddr, size, aq))
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("Copying of %s object [%p..%p) to %s object [%p..%p) failed",
src, srcaddr, srcaddr + size, dst, dstaddr, dstaddr + size);
}
}
/* Infrastructure for coalescing adjacent or nearly adjacent (in device addresses)
host to device memory transfers. */
struct gomp_coalesce_chunk
{
/* The starting and ending point of a coalesced chunk of memory. */
size_t start, end;
};
struct gomp_coalesce_buf
{
/* Buffer into which gomp_copy_host2dev will memcpy data and from which
it will be copied to the device. */
void *buf;
struct target_mem_desc *tgt;
/* Array with offsets, chunks[i].start is the starting offset and
chunks[i].end ending offset relative to tgt->tgt_start device address
of chunks which are to be copied to buf and later copied to device. */
struct gomp_coalesce_chunk *chunks;
/* Number of chunks in chunks array, or -1 if coalesce buffering should not
be performed. */
long chunk_cnt;
/* During construction of chunks array, how many memory regions are within
the last chunk. If there is just one memory region for a chunk, we copy
it directly to device rather than going through buf. */
long use_cnt;
};
/* Maximum size of memory region considered for coalescing. Larger copies
are performed directly. */
#define MAX_COALESCE_BUF_SIZE (32 * 1024)
/* Maximum size of a gap in between regions to consider them being copied
within the same chunk. All the device offsets considered are within
newly allocated device memory, so it isn't fatal if we copy some padding
in between from host to device. The gaps come either from alignment
padding or from memory regions which are not supposed to be copied from
host to device (e.g. map(alloc:), map(from:) etc.). */
#define MAX_COALESCE_BUF_GAP (4 * 1024)
/* Add region with device tgt_start relative offset and length to CBUF. */
static inline void
gomp_coalesce_buf_add (struct gomp_coalesce_buf *cbuf, size_t start, size_t len)
{
if (len > MAX_COALESCE_BUF_SIZE || len == 0)
return;
if (cbuf->chunk_cnt)
{
if (cbuf->chunk_cnt < 0)
return;
if (start < cbuf->chunks[cbuf->chunk_cnt - 1].end)
{
cbuf->chunk_cnt = -1;
return;
}
if (start < cbuf->chunks[cbuf->chunk_cnt - 1].end + MAX_COALESCE_BUF_GAP)
{
cbuf->chunks[cbuf->chunk_cnt - 1].end = start + len;
cbuf->use_cnt++;
return;
}
/* If the last chunk is only used by one mapping, discard it,
as it will be one host to device copy anyway and
memcpying it around will only waste cycles. */
if (cbuf->use_cnt == 1)
cbuf->chunk_cnt--;
}
cbuf->chunks[cbuf->chunk_cnt].start = start;
cbuf->chunks[cbuf->chunk_cnt].end = start + len;
cbuf->chunk_cnt++;
cbuf->use_cnt = 1;
}
/* Return true for mapping kinds which need to copy data from the
host to device for regions that weren't previously mapped. */
static inline bool
gomp_to_device_kind_p (int kind)
{
switch (kind)
{
case GOMP_MAP_ALLOC:
case GOMP_MAP_FROM:
case GOMP_MAP_FORCE_ALLOC:
case GOMP_MAP_FORCE_FROM:
case GOMP_MAP_ALWAYS_FROM:
return false;
default:
return true;
}
}
attribute_hidden void
gomp_copy_host2dev (struct gomp_device_descr *devicep,
struct goacc_asyncqueue *aq,
void *d, const void *h, size_t sz,
struct gomp_coalesce_buf *cbuf)
{
if (cbuf)
{
uintptr_t doff = (uintptr_t) d - cbuf->tgt->tgt_start;
if (doff < cbuf->chunks[cbuf->chunk_cnt - 1].end)
{
long first = 0;
long last = cbuf->chunk_cnt - 1;
while (first <= last)
{
long middle = (first + last) >> 1;
if (cbuf->chunks[middle].end <= doff)
first = middle + 1;
else if (cbuf->chunks[middle].start <= doff)
{
if (doff + sz > cbuf->chunks[middle].end)
gomp_fatal ("internal libgomp cbuf error");
memcpy ((char *) cbuf->buf + (doff - cbuf->chunks[0].start),
h, sz);
return;
}
else
last = middle - 1;
}
}
}
if (__builtin_expect (aq != NULL, 0))
goacc_device_copy_async (devicep, devicep->openacc.async.host2dev_func,
"dev", d, "host", h, sz, aq);
else
gomp_device_copy (devicep, devicep->host2dev_func, "dev", d, "host", h, sz);
}
attribute_hidden void
gomp_copy_dev2host (struct gomp_device_descr *devicep,
struct goacc_asyncqueue *aq,
void *h, const void *d, size_t sz)
{
if (__builtin_expect (aq != NULL, 0))
goacc_device_copy_async (devicep, devicep->openacc.async.dev2host_func,
"host", h, "dev", d, sz, aq);
else
gomp_device_copy (devicep, devicep->dev2host_func, "host", h, "dev", d, sz);
}
static void
gomp_free_device_memory (struct gomp_device_descr *devicep, void *devptr)
{
if (!devicep->free_func (devicep->target_id, devptr))
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("error in freeing device memory block at %p", devptr);
}
}
/* Handle the case where gomp_map_lookup, splay_tree_lookup or
gomp_map_0len_lookup found oldn for newn.
Helper function of gomp_map_vars. */
static inline void
gomp_map_vars_existing (struct gomp_device_descr *devicep,
struct goacc_asyncqueue *aq, splay_tree_key oldn,
splay_tree_key newn, struct target_var_desc *tgt_var,
unsigned char kind, bool always_to_flag,
struct gomp_coalesce_buf *cbuf)
{
assert (kind != GOMP_MAP_ATTACH);
tgt_var->key = oldn;
tgt_var->copy_from = GOMP_MAP_COPY_FROM_P (kind);
tgt_var->always_copy_from = GOMP_MAP_ALWAYS_FROM_P (kind);
tgt_var->is_attach = false;
tgt_var->offset = newn->host_start - oldn->host_start;
tgt_var->length = newn->host_end - newn->host_start;
if ((kind & GOMP_MAP_FLAG_FORCE)
|| oldn->host_start > newn->host_start
|| oldn->host_end < newn->host_end)
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("Trying to map into device [%p..%p) object when "
"[%p..%p) is already mapped",
(void *) newn->host_start, (void *) newn->host_end,
(void *) oldn->host_start, (void *) oldn->host_end);
}
if (GOMP_MAP_ALWAYS_TO_P (kind) || always_to_flag)
gomp_copy_host2dev (devicep, aq,
(void *) (oldn->tgt->tgt_start + oldn->tgt_offset
+ newn->host_start - oldn->host_start),
(void *) newn->host_start,
newn->host_end - newn->host_start, cbuf);
if (oldn->refcount != REFCOUNT_INFINITY)
oldn->refcount++;
}
static int
get_kind (bool short_mapkind, void *kinds, int idx)
{
return short_mapkind ? ((unsigned short *) kinds)[idx]
: ((unsigned char *) kinds)[idx];
}
static void
gomp_map_pointer (struct target_mem_desc *tgt, struct goacc_asyncqueue *aq,
uintptr_t host_ptr, uintptr_t target_offset, uintptr_t bias,
struct gomp_coalesce_buf *cbuf)
{
struct gomp_device_descr *devicep = tgt->device_descr;
struct splay_tree_s *mem_map = &devicep->mem_map;
struct splay_tree_key_s cur_node;
cur_node.host_start = host_ptr;
if (cur_node.host_start == (uintptr_t) NULL)
{
cur_node.tgt_offset = (uintptr_t) NULL;
gomp_copy_host2dev (devicep, aq,
(void *) (tgt->tgt_start + target_offset),
(void *) &cur_node.tgt_offset,
sizeof (void *), cbuf);
return;
}
/* Add bias to the pointer value. */
cur_node.host_start += bias;
cur_node.host_end = cur_node.host_start;
splay_tree_key n = gomp_map_lookup (mem_map, &cur_node);
if (n == NULL)
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("Pointer target of array section wasn't mapped");
}
cur_node.host_start -= n->host_start;
cur_node.tgt_offset
= n->tgt->tgt_start + n->tgt_offset + cur_node.host_start;
/* At this point tgt_offset is target address of the
array section. Now subtract bias to get what we want
to initialize the pointer with. */
cur_node.tgt_offset -= bias;
gomp_copy_host2dev (devicep, aq, (void *) (tgt->tgt_start + target_offset),
(void *) &cur_node.tgt_offset, sizeof (void *), cbuf);
}
static void
gomp_map_fields_existing (struct target_mem_desc *tgt,
struct goacc_asyncqueue *aq, splay_tree_key n,
size_t first, size_t i, void **hostaddrs,
size_t *sizes, void *kinds,
struct gomp_coalesce_buf *cbuf)
{
struct gomp_device_descr *devicep = tgt->device_descr;
struct splay_tree_s *mem_map = &devicep->mem_map;
struct splay_tree_key_s cur_node;
int kind;
const bool short_mapkind = true;
const int typemask = short_mapkind ? 0xff : 0x7;
cur_node.host_start = (uintptr_t) hostaddrs[i];
cur_node.host_end = cur_node.host_start + sizes[i];
splay_tree_key n2 = splay_tree_lookup (mem_map, &cur_node);
kind = get_kind (short_mapkind, kinds, i);
if (n2
&& n2->tgt == n->tgt
&& n2->host_start - n->host_start == n2->tgt_offset - n->tgt_offset)
{
gomp_map_vars_existing (devicep, aq, n2, &cur_node, &tgt->list[i],
kind & typemask, false, cbuf);
return;
}
if (sizes[i] == 0)
{
if (cur_node.host_start > (uintptr_t) hostaddrs[first - 1])
{
cur_node.host_start--;
n2 = splay_tree_lookup (mem_map, &cur_node);
cur_node.host_start++;
if (n2
&& n2->tgt == n->tgt
&& n2->host_start - n->host_start
== n2->tgt_offset - n->tgt_offset)
{
gomp_map_vars_existing (devicep, aq, n2, &cur_node, &tgt->list[i],
kind & typemask, false, cbuf);
return;
}
}
cur_node.host_end++;
n2 = splay_tree_lookup (mem_map, &cur_node);
cur_node.host_end--;
if (n2
&& n2->tgt == n->tgt
&& n2->host_start - n->host_start == n2->tgt_offset - n->tgt_offset)
{
gomp_map_vars_existing (devicep, aq, n2, &cur_node, &tgt->list[i],
kind & typemask, false, cbuf);
return;
}
}
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("Trying to map into device [%p..%p) structure element when "
"other mapped elements from the same structure weren't mapped "
"together with it", (void *) cur_node.host_start,
(void *) cur_node.host_end);
}
attribute_hidden void
gomp_attach_pointer (struct gomp_device_descr *devicep,
struct goacc_asyncqueue *aq, splay_tree mem_map,
splay_tree_key n, uintptr_t attach_to, size_t bias,
struct gomp_coalesce_buf *cbufp)
{
struct splay_tree_key_s s;
size_t size, idx;
if (n == NULL)
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("enclosing struct not mapped for attach");
}
size = (n->host_end - n->host_start + sizeof (void *) - 1) / sizeof (void *);
/* We might have a pointer in a packed struct: however we cannot have more
than one such pointer in each pointer-sized portion of the struct, so
this is safe. */
idx = (attach_to - n->host_start) / sizeof (void *);
if (!n->aux)
n->aux = gomp_malloc_cleared (sizeof (struct splay_tree_aux));
if (!n->aux->attach_count)
n->aux->attach_count
= gomp_malloc_cleared (sizeof (*n->aux->attach_count) * size);
if (n->aux->attach_count[idx] < UINTPTR_MAX)
n->aux->attach_count[idx]++;
else
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("attach count overflow");
}
if (n->aux->attach_count[idx] == 1)
{
uintptr_t devptr = n->tgt->tgt_start + n->tgt_offset + attach_to
- n->host_start;
uintptr_t target = (uintptr_t) *(void **) attach_to;
splay_tree_key tn;
uintptr_t data;
if ((void *) target == NULL)
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("attempt to attach null pointer");
}
s.host_start = target + bias;
s.host_end = s.host_start + 1;
tn = splay_tree_lookup (mem_map, &s);
if (!tn)
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("pointer target not mapped for attach");
}
data = tn->tgt->tgt_start + tn->tgt_offset + target - tn->host_start;
gomp_debug (1,
"%s: attaching host %p, target %p (struct base %p) to %p\n",
__FUNCTION__, (void *) attach_to, (void *) devptr,
(void *) (n->tgt->tgt_start + n->tgt_offset), (void *) data);
gomp_copy_host2dev (devicep, aq, (void *) devptr, (void *) &data,
sizeof (void *), cbufp);
}
else
gomp_debug (1, "%s: attach count for %p -> %u\n", __FUNCTION__,
(void *) attach_to, (int) n->aux->attach_count[idx]);
}
attribute_hidden void
gomp_detach_pointer (struct gomp_device_descr *devicep,
struct goacc_asyncqueue *aq, splay_tree_key n,
uintptr_t detach_from, bool finalize,
struct gomp_coalesce_buf *cbufp)
{
size_t idx;
if (n == NULL)
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("enclosing struct not mapped for detach");
}
idx = (detach_from - n->host_start) / sizeof (void *);
if (!n->aux || !n->aux->attach_count)
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("no attachment counters for struct");
}
if (finalize)
n->aux->attach_count[idx] = 1;
if (n->aux->attach_count[idx] == 0)
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("attach count underflow");
}
else
n->aux->attach_count[idx]--;
if (n->aux->attach_count[idx] == 0)
{
uintptr_t devptr = n->tgt->tgt_start + n->tgt_offset + detach_from
- n->host_start;
uintptr_t target = (uintptr_t) *(void **) detach_from;
gomp_debug (1,
"%s: detaching host %p, target %p (struct base %p) to %p\n",
__FUNCTION__, (void *) detach_from, (void *) devptr,
(void *) (n->tgt->tgt_start + n->tgt_offset),
(void *) target);
gomp_copy_host2dev (devicep, aq, (void *) devptr, (void *) &target,
sizeof (void *), cbufp);
}
else
gomp_debug (1, "%s: attach count for %p -> %u\n", __FUNCTION__,
(void *) detach_from, (int) n->aux->attach_count[idx]);
}
attribute_hidden uintptr_t
gomp_map_val (struct target_mem_desc *tgt, void **hostaddrs, size_t i)
{
if (tgt->list[i].key != NULL)
return tgt->list[i].key->tgt->tgt_start
+ tgt->list[i].key->tgt_offset
+ tgt->list[i].offset;
switch (tgt->list[i].offset)
{
case OFFSET_INLINED:
return (uintptr_t) hostaddrs[i];
case OFFSET_POINTER:
return 0;
case OFFSET_STRUCT:
return tgt->list[i + 1].key->tgt->tgt_start
+ tgt->list[i + 1].key->tgt_offset
+ tgt->list[i + 1].offset
+ (uintptr_t) hostaddrs[i]
- (uintptr_t) hostaddrs[i + 1];
default:
return tgt->tgt_start + tgt->list[i].offset;
}
}
static inline __attribute__((always_inline)) struct target_mem_desc *
gomp_map_vars_internal (struct gomp_device_descr *devicep,
struct goacc_asyncqueue *aq, size_t mapnum,
void **hostaddrs, void **devaddrs, size_t *sizes,
void *kinds, bool short_mapkind,
enum gomp_map_vars_kind pragma_kind)
{
size_t i, tgt_align, tgt_size, not_found_cnt = 0;
bool has_firstprivate = false;
bool has_always_ptrset = false;
const int rshift = short_mapkind ? 8 : 3;
const int typemask = short_mapkind ? 0xff : 0x7;
struct splay_tree_s *mem_map = &devicep->mem_map;
struct splay_tree_key_s cur_node;
struct target_mem_desc *tgt
= gomp_malloc (sizeof (*tgt) + sizeof (tgt->list[0]) * mapnum);
tgt->list_count = mapnum;
tgt->refcount = (pragma_kind & GOMP_MAP_VARS_ENTER_DATA) ? 0 : 1;
tgt->device_descr = devicep;
tgt->prev = NULL;
struct gomp_coalesce_buf cbuf, *cbufp = NULL;
if (mapnum == 0)
{
tgt->tgt_start = 0;
tgt->tgt_end = 0;
return tgt;
}
tgt_align = sizeof (void *);
tgt_size = 0;
cbuf.chunks = NULL;
cbuf.chunk_cnt = -1;
cbuf.use_cnt = 0;
cbuf.buf = NULL;
if (mapnum > 1 || pragma_kind == GOMP_MAP_VARS_TARGET)
{
size_t chunks_size = (mapnum + 1) * sizeof (struct gomp_coalesce_chunk);
cbuf.chunks = (struct gomp_coalesce_chunk *) gomp_alloca (chunks_size);
cbuf.chunk_cnt = 0;
}
if (pragma_kind == GOMP_MAP_VARS_TARGET)
{
size_t align = 4 * sizeof (void *);
tgt_align = align;
tgt_size = mapnum * sizeof (void *);
cbuf.chunk_cnt = 1;
cbuf.use_cnt = 1 + (mapnum > 1);
cbuf.chunks[0].start = 0;
cbuf.chunks[0].end = tgt_size;
}
gomp_mutex_lock (&devicep->lock);
if (devicep->state == GOMP_DEVICE_FINALIZED)
{
gomp_mutex_unlock (&devicep->lock);
free (tgt);
return NULL;
}
for (i = 0; i < mapnum; i++)
{
int kind = get_kind (short_mapkind, kinds, i);
if (hostaddrs[i] == NULL
|| (kind & typemask) == GOMP_MAP_FIRSTPRIVATE_INT)
{
tgt->list[i].key = NULL;
tgt->list[i].offset = OFFSET_INLINED;
continue;
}
else if ((kind & typemask) == GOMP_MAP_USE_DEVICE_PTR
|| (kind & typemask) == GOMP_MAP_USE_DEVICE_PTR_IF_PRESENT)
{
tgt->list[i].key = NULL;
if (!not_found_cnt)
{
/* In OpenMP < 5.0 and OpenACC the mapping has to be done
on a separate construct prior to using use_device_{addr,ptr}.
In OpenMP 5.0, map directives need to be ordered by the
middle-end before the use_device_* clauses. If
!not_found_cnt, all mappings requested (if any) are already
mapped, so use_device_{addr,ptr} can be resolved right away.
Otherwise, if not_found_cnt, gomp_map_lookup might fail
now but would succeed after performing the mappings in the
following loop. We can't defer this always to the second
loop, because it is not even invoked when !not_found_cnt
after the first loop. */
cur_node.host_start = (uintptr_t) hostaddrs[i];
cur_node.host_end = cur_node.host_start;
splay_tree_key n = gomp_map_lookup (mem_map, &cur_node);
if (n != NULL)
{
cur_node.host_start -= n->host_start;
hostaddrs[i]
= (void *) (n->tgt->tgt_start + n->tgt_offset
+ cur_node.host_start);
}
else if ((kind & typemask) == GOMP_MAP_USE_DEVICE_PTR)
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("use_device_ptr pointer wasn't mapped");
}
else if ((kind & typemask) == GOMP_MAP_USE_DEVICE_PTR_IF_PRESENT)
/* If not present, continue using the host address. */
;
else
__builtin_unreachable ();
tgt->list[i].offset = OFFSET_INLINED;
}
else
tgt->list[i].offset = 0;
continue;
}
else if ((kind & typemask) == GOMP_MAP_STRUCT)
{
size_t first = i + 1;
size_t last = i + sizes[i];
cur_node.host_start = (uintptr_t) hostaddrs[i];
cur_node.host_end = (uintptr_t) hostaddrs[last]
+ sizes[last];
tgt->list[i].key = NULL;
tgt->list[i].offset = OFFSET_STRUCT;
splay_tree_key n = splay_tree_lookup (mem_map, &cur_node);
if (n == NULL)
{
size_t align = (size_t) 1 << (kind >> rshift);
if (tgt_align < align)
tgt_align = align;
tgt_size -= (uintptr_t) hostaddrs[first] - cur_node.host_start;
tgt_size = (tgt_size + align - 1) & ~(align - 1);
tgt_size += cur_node.host_end - cur_node.host_start;
not_found_cnt += last - i;
for (i = first; i <= last; i++)
{
tgt->list[i].key = NULL;
if (gomp_to_device_kind_p (get_kind (short_mapkind, kinds, i)
& typemask))
gomp_coalesce_buf_add (&cbuf,
tgt_size - cur_node.host_end
+ (uintptr_t) hostaddrs[i],
sizes[i]);
}
i--;
continue;
}
for (i = first; i <= last; i++)
gomp_map_fields_existing (tgt, aq, n, first, i, hostaddrs,
sizes, kinds, NULL);
i--;
continue;
}
else if ((kind & typemask) == GOMP_MAP_ALWAYS_POINTER)
{
tgt->list[i].key = NULL;
tgt->list[i].offset = OFFSET_POINTER;
has_firstprivate = true;
continue;
}
else if ((kind & typemask) == GOMP_MAP_ATTACH)
{
tgt->list[i].key = NULL;
has_firstprivate = true;
continue;
}
cur_node.host_start = (uintptr_t) hostaddrs[i];
if (!GOMP_MAP_POINTER_P (kind & typemask))
cur_node.host_end = cur_node.host_start + sizes[i];
else
cur_node.host_end = cur_node.host_start + sizeof (void *);
if ((kind & typemask) == GOMP_MAP_FIRSTPRIVATE)
{
tgt->list[i].key = NULL;
size_t align = (size_t) 1 << (kind >> rshift);
if (tgt_align < align)
tgt_align = align;
tgt_size = (tgt_size + align - 1) & ~(align - 1);
gomp_coalesce_buf_add (&cbuf, tgt_size,
cur_node.host_end - cur_node.host_start);
tgt_size += cur_node.host_end - cur_node.host_start;
has_firstprivate = true;
continue;
}
splay_tree_key n;
if ((kind & typemask) == GOMP_MAP_ZERO_LEN_ARRAY_SECTION)
{
n = gomp_map_0len_lookup (mem_map, &cur_node);
if (!n)
{
tgt->list[i].key = NULL;
tgt->list[i].offset = OFFSET_POINTER;
continue;
}
}
else
n = splay_tree_lookup (mem_map, &cur_node);
if (n && n->refcount != REFCOUNT_LINK)
{
int always_to_cnt = 0;
if ((kind & typemask) == GOMP_MAP_TO_PSET)
{
bool has_nullptr = false;
size_t j;
for (j = 0; j < n->tgt->list_count; j++)
if (n->tgt->list[j].key == n)
{
has_nullptr = n->tgt->list[j].has_null_ptr_assoc;
break;
}
if (n->tgt->list_count == 0)
{
/* 'declare target'; assume has_nullptr; it could also be
statically assigned pointer, but that it should be to
the equivalent variable on the host. */
assert (n->refcount == REFCOUNT_INFINITY);
has_nullptr = true;
}
else
assert (j < n->tgt->list_count);
/* Re-map the data if there is an 'always' modifier or if it a
null pointer was there and non a nonnull has been found; that
permits transparent re-mapping for Fortran array descriptors
which were previously mapped unallocated. */
for (j = i + 1; j < mapnum; j++)
{
int ptr_kind = get_kind (short_mapkind, kinds, j) & typemask;
if (!GOMP_MAP_ALWAYS_POINTER_P (ptr_kind)
&& (!has_nullptr
|| !GOMP_MAP_POINTER_P (ptr_kind)
|| *(void **) hostaddrs[j] == NULL))
break;
else if ((uintptr_t) hostaddrs[j] < cur_node.host_start
|| ((uintptr_t) hostaddrs[j] + sizeof (void *)
> cur_node.host_end))
break;
else
{
has_always_ptrset = true;
++always_to_cnt;
}
}
}
gomp_map_vars_existing (devicep, aq, n, &cur_node, &tgt->list[i],
kind & typemask, always_to_cnt > 0, NULL);
i += always_to_cnt;
}
else
{
tgt->list[i].key = NULL;
if ((kind & typemask) == GOMP_MAP_IF_PRESENT)
{
/* Not present, hence, skip entry - including its MAP_POINTER,
when existing. */
tgt->list[i].offset = OFFSET_POINTER;
if (i + 1 < mapnum
&& ((typemask & get_kind (short_mapkind, kinds, i + 1))
== GOMP_MAP_POINTER))
{
++i;
tgt->list[i].key = NULL;
tgt->list[i].offset = 0;
}
continue;
}
size_t align = (size_t) 1 << (kind >> rshift);
not_found_cnt++;
if (tgt_align < align)
tgt_align = align;
tgt_size = (tgt_size + align - 1) & ~(align - 1);
if (gomp_to_device_kind_p (kind & typemask))
gomp_coalesce_buf_add (&cbuf, tgt_size,
cur_node.host_end - cur_node.host_start);
tgt_size += cur_node.host_end - cur_node.host_start;
if ((kind & typemask) == GOMP_MAP_TO_PSET)
{
size_t j;
int kind;
for (j = i + 1; j < mapnum; j++)
if (!GOMP_MAP_POINTER_P ((kind = (get_kind (short_mapkind,
kinds, j)) & typemask))
&& !GOMP_MAP_ALWAYS_POINTER_P (kind))
break;
else if ((uintptr_t) hostaddrs[j] < cur_node.host_start
|| ((uintptr_t) hostaddrs[j] + sizeof (void *)
> cur_node.host_end))
break;
else
{
tgt->list[j].key = NULL;
i++;
}
}
}
}
if (devaddrs)
{
if (mapnum != 1)
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("unexpected aggregation");
}
tgt->to_free = devaddrs[0];
tgt->tgt_start = (uintptr_t) tgt->to_free;
tgt->tgt_end = tgt->tgt_start + sizes[0];
}
else if (not_found_cnt || pragma_kind == GOMP_MAP_VARS_TARGET)
{
/* Allocate tgt_align aligned tgt_size block of memory. */
/* FIXME: Perhaps change interface to allocate properly aligned
memory. */
tgt->to_free = devicep->alloc_func (devicep->target_id,
tgt_size + tgt_align - 1);
if (!tgt->to_free)
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("device memory allocation fail");
}
tgt->tgt_start = (uintptr_t) tgt->to_free;
tgt->tgt_start = (tgt->tgt_start + tgt_align - 1) & ~(tgt_align - 1);
tgt->tgt_end = tgt->tgt_start + tgt_size;
if (cbuf.use_cnt == 1)
cbuf.chunk_cnt--;
if (cbuf.chunk_cnt > 0)
{
cbuf.buf
= malloc (cbuf.chunks[cbuf.chunk_cnt - 1].end - cbuf.chunks[0].start);
if (cbuf.buf)
{
cbuf.tgt = tgt;
cbufp = &cbuf;
}
}
}
else
{
tgt->to_free = NULL;
tgt->tgt_start = 0;
tgt->tgt_end = 0;
}
tgt_size = 0;
if (pragma_kind == GOMP_MAP_VARS_TARGET)
tgt_size = mapnum * sizeof (void *);
tgt->array = NULL;
if (not_found_cnt || has_firstprivate || has_always_ptrset)
{
if (not_found_cnt)
tgt->array = gomp_malloc (not_found_cnt * sizeof (*tgt->array));
splay_tree_node array = tgt->array;
size_t j, field_tgt_offset = 0, field_tgt_clear = FIELD_TGT_EMPTY;
uintptr_t field_tgt_base = 0;
for (i = 0; i < mapnum; i++)
if (has_always_ptrset
&& tgt->list[i].key
&& (get_kind (short_mapkind, kinds, i) & typemask)
== GOMP_MAP_TO_PSET)
{
splay_tree_key k = tgt->list[i].key;
bool has_nullptr = false;
size_t j;
for (j = 0; j < k->tgt->list_count; j++)
if (k->tgt->list[j].key == k)
{
has_nullptr = k->tgt->list[j].has_null_ptr_assoc;
break;
}
if (k->tgt->list_count == 0)
has_nullptr = true;
else
assert (j < k->tgt->list_count);
tgt->list[i].has_null_ptr_assoc = false;
for (j = i + 1; j < mapnum; j++)
{
int ptr_kind = get_kind (short_mapkind, kinds, j) & typemask;
if (!GOMP_MAP_ALWAYS_POINTER_P (ptr_kind)
&& (!has_nullptr
|| !GOMP_MAP_POINTER_P (ptr_kind)
|| *(void **) hostaddrs[j] == NULL))
break;
else if ((uintptr_t) hostaddrs[j] < k->host_start
|| ((uintptr_t) hostaddrs[j] + sizeof (void *)
> k->host_end))
break;
else
{
if (*(void **) hostaddrs[j] == NULL)
tgt->list[i].has_null_ptr_assoc = true;
tgt->list[j].key = k;
tgt->list[j].copy_from = false;
tgt->list[j].always_copy_from = false;
tgt->list[j].is_attach = false;
if (k->refcount != REFCOUNT_INFINITY)
k->refcount++;
gomp_map_pointer (k->tgt, aq,
(uintptr_t) *(void **) hostaddrs[j],
k->tgt_offset + ((uintptr_t) hostaddrs[j]
- k->host_start),
sizes[j], cbufp);
}
}
i = j - 1;
}
else if (tgt->list[i].key == NULL)
{
int kind = get_kind (short_mapkind, kinds, i);
if (hostaddrs[i] == NULL)
continue;
switch (kind & typemask)
{
size_t align, len, first, last;
splay_tree_key n;
case GOMP_MAP_FIRSTPRIVATE:
align = (size_t) 1 << (kind >> rshift);
tgt_size = (tgt_size + align - 1) & ~(align - 1);
tgt->list[i].offset = tgt_size;
len = sizes[i];
gomp_copy_host2dev (devicep, aq,
(void *) (tgt->tgt_start + tgt_size),
(void *) hostaddrs[i], len, cbufp);
tgt_size += len;
continue;
case GOMP_MAP_FIRSTPRIVATE_INT:
case GOMP_MAP_ZERO_LEN_ARRAY_SECTION:
continue;
case GOMP_MAP_USE_DEVICE_PTR_IF_PRESENT:
/* The OpenACC 'host_data' construct only allows 'use_device'
"mapping" clauses, so in the first loop, 'not_found_cnt'
must always have been zero, so all OpenACC 'use_device'
clauses have already been handled. (We can only easily test
'use_device' with 'if_present' clause here.) */
assert (tgt->list[i].offset == OFFSET_INLINED);
/* Nevertheless, FALLTHRU to the normal handling, to keep the
code conceptually simple, similar to the first loop. */
case GOMP_MAP_USE_DEVICE_PTR:
if (tgt->list[i].offset == 0)
{
cur_node.host_start = (uintptr_t) hostaddrs[i];
cur_node.host_end = cur_node.host_start;
n = gomp_map_lookup (mem_map, &cur_node);
if (n != NULL)
{
cur_node.host_start -= n->host_start;
hostaddrs[i]
= (void *) (n->tgt->tgt_start + n->tgt_offset
+ cur_node.host_start);
}
else if ((kind & typemask) == GOMP_MAP_USE_DEVICE_PTR)
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("use_device_ptr pointer wasn't mapped");
}
else if ((kind & typemask)
== GOMP_MAP_USE_DEVICE_PTR_IF_PRESENT)
/* If not present, continue using the host address. */
;
else
__builtin_unreachable ();
tgt->list[i].offset = OFFSET_INLINED;
}
continue;
case GOMP_MAP_STRUCT:
first = i + 1;
last = i + sizes[i];
cur_node.host_start = (uintptr_t) hostaddrs[i];
cur_node.host_end = (uintptr_t) hostaddrs[last]
+ sizes[last];
if (tgt->list[first].key != NULL)
continue;
n = splay_tree_lookup (mem_map, &cur_node);
if (n == NULL)
{
size_t align = (size_t) 1 << (kind >> rshift);
tgt_size -= (uintptr_t) hostaddrs[first]
- (uintptr_t) hostaddrs[i];
tgt_size = (tgt_size + align - 1) & ~(align - 1);
tgt_size += (uintptr_t) hostaddrs[first]
- (uintptr_t) hostaddrs[i];
field_tgt_base = (uintptr_t) hostaddrs[first];
field_tgt_offset = tgt_size;
field_tgt_clear = last;
tgt_size += cur_node.host_end
- (uintptr_t) hostaddrs[first];
continue;
}
for (i = first; i <= last; i++)
gomp_map_fields_existing (tgt, aq, n, first, i, hostaddrs,
sizes, kinds, cbufp);
i--;
continue;
case GOMP_MAP_ALWAYS_POINTER:
cur_node.host_start = (uintptr_t) hostaddrs[i];
cur_node.host_end = cur_node.host_start + sizeof (void *);
n = splay_tree_lookup (mem_map, &cur_node);
if (n == NULL
|| n->host_start > cur_node.host_start
|| n->host_end < cur_node.host_end)
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("always pointer not mapped");
}
if ((get_kind (short_mapkind, kinds, i - 1) & typemask)
!= GOMP_MAP_ALWAYS_POINTER)
cur_node.tgt_offset = gomp_map_val (tgt, hostaddrs, i - 1);
if (cur_node.tgt_offset)
cur_node.tgt_offset -= sizes[i];
gomp_copy_host2dev (devicep, aq,
(void *) (n->tgt->tgt_start
+ n->tgt_offset
+ cur_node.host_start
- n->host_start),
(void *) &cur_node.tgt_offset,
sizeof (void *), cbufp);
cur_node.tgt_offset = n->tgt->tgt_start + n->tgt_offset
+ cur_node.host_start - n->host_start;
continue;
case GOMP_MAP_IF_PRESENT:
/* Not present - otherwise handled above. Skip over its
MAP_POINTER as well. */
if (i + 1 < mapnum
&& ((typemask & get_kind (short_mapkind, kinds, i + 1))
== GOMP_MAP_POINTER))
++i;
continue;
case GOMP_MAP_ATTACH:
{
cur_node.host_start = (uintptr_t) hostaddrs[i];
cur_node.host_end = cur_node.host_start + sizeof (void *);
splay_tree_key n = splay_tree_lookup (mem_map, &cur_node);
if (n != NULL)
{
tgt->list[i].key = n;
tgt->list[i].offset = cur_node.host_start - n->host_start;
tgt->list[i].length = n->host_end - n->host_start;
tgt->list[i].copy_from = false;
tgt->list[i].always_copy_from = false;
tgt->list[i].is_attach = true;
/* OpenACC 'attach'/'detach' doesn't affect
structured/dynamic reference counts ('n->refcount',
'n->dynamic_refcount'). */
gomp_attach_pointer (devicep, aq, mem_map, n,
(uintptr_t) hostaddrs[i], sizes[i],
cbufp);
}
else if ((pragma_kind & GOMP_MAP_VARS_OPENACC) != 0)
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("outer struct not mapped for attach");
}
continue;
}
default:
break;
}
splay_tree_key k = &array->key;
k->host_start = (uintptr_t) hostaddrs[i];
if (!GOMP_MAP_POINTER_P (kind & typemask))
k->host_end = k->host_start + sizes[i];
else
k->host_end = k->host_start + sizeof (void *);
splay_tree_key n = splay_tree_lookup (mem_map, k);
if (n && n->refcount != REFCOUNT_LINK)
gomp_map_vars_existing (devicep, aq, n, k, &tgt->list[i],
kind & typemask, false, cbufp);
else
{
k->aux = NULL;
if (n && n->refcount == REFCOUNT_LINK)
{
/* Replace target address of the pointer with target address
of mapped object in the splay tree. */
splay_tree_remove (mem_map, n);
k->aux
= gomp_malloc_cleared (sizeof (struct splay_tree_aux));
k->aux->link_key = n;
}
size_t align = (size_t) 1 << (kind >> rshift);
tgt->list[i].key = k;
k->tgt = tgt;
if (field_tgt_clear != FIELD_TGT_EMPTY)
{
k->tgt_offset = k->host_start - field_tgt_base
+ field_tgt_offset;
if (i == field_tgt_clear)
field_tgt_clear = FIELD_TGT_EMPTY;
}
else
{
tgt_size = (tgt_size + align - 1) & ~(align - 1);
k->tgt_offset = tgt_size;
tgt_size += k->host_end - k->host_start;
}
tgt->list[i].copy_from = GOMP_MAP_COPY_FROM_P (kind & typemask);
tgt->list[i].always_copy_from
= GOMP_MAP_ALWAYS_FROM_P (kind & typemask);
tgt->list[i].is_attach = false;
tgt->list[i].offset = 0;
tgt->list[i].length = k->host_end - k->host_start;
k->refcount = 1;
k->dynamic_refcount = 0;
tgt->refcount++;
array->left = NULL;
array->right = NULL;
splay_tree_insert (mem_map, array);
switch (kind & typemask)
{
case GOMP_MAP_ALLOC:
case GOMP_MAP_FROM:
case GOMP_MAP_FORCE_ALLOC:
case GOMP_MAP_FORCE_FROM:
case GOMP_MAP_ALWAYS_FROM:
break;
case GOMP_MAP_TO:
case GOMP_MAP_TOFROM:
case GOMP_MAP_FORCE_TO:
case GOMP_MAP_FORCE_TOFROM:
case GOMP_MAP_ALWAYS_TO:
case GOMP_MAP_ALWAYS_TOFROM:
gomp_copy_host2dev (devicep, aq,
(void *) (tgt->tgt_start
+ k->tgt_offset),
(void *) k->host_start,
k->host_end - k->host_start, cbufp);
break;
case GOMP_MAP_POINTER:
gomp_map_pointer (tgt, aq,
(uintptr_t) *(void **) k->host_start,
k->tgt_offset, sizes[i], cbufp);
break;
case GOMP_MAP_TO_PSET:
gomp_copy_host2dev (devicep, aq,
(void *) (tgt->tgt_start
+ k->tgt_offset),
(void *) k->host_start,
k->host_end - k->host_start, cbufp);
tgt->list[i].has_null_ptr_assoc = false;
for (j = i + 1; j < mapnum; j++)
{
int ptr_kind = (get_kind (short_mapkind, kinds, j)
& typemask);
if (!GOMP_MAP_POINTER_P (ptr_kind)
&& !GOMP_MAP_ALWAYS_POINTER_P (ptr_kind))
break;
else if ((uintptr_t) hostaddrs[j] < k->host_start
|| ((uintptr_t) hostaddrs[j] + sizeof (void *)
> k->host_end))
break;
else
{
tgt->list[j].key = k;
tgt->list[j].copy_from = false;
tgt->list[j].always_copy_from = false;
tgt->list[j].is_attach = false;
tgt->list[i].has_null_ptr_assoc |= !(*(void **) hostaddrs[j]);
if (k->refcount != REFCOUNT_INFINITY)
k->refcount++;
gomp_map_pointer (tgt, aq,
(uintptr_t) *(void **) hostaddrs[j],
k->tgt_offset
+ ((uintptr_t) hostaddrs[j]
- k->host_start),
sizes[j], cbufp);
}
}
i = j - 1;
break;
case GOMP_MAP_FORCE_PRESENT:
{
/* We already looked up the memory region above and it
was missing. */
size_t size = k->host_end - k->host_start;
gomp_mutex_unlock (&devicep->lock);
#ifdef HAVE_INTTYPES_H
gomp_fatal ("present clause: !acc_is_present (%p, "
"%"PRIu64" (0x%"PRIx64"))",
(void *) k->host_start,
(uint64_t) size, (uint64_t) size);
#else
gomp_fatal ("present clause: !acc_is_present (%p, "
"%lu (0x%lx))", (void *) k->host_start,
(unsigned long) size, (unsigned long) size);
#endif
}
break;
case GOMP_MAP_FORCE_DEVICEPTR:
assert (k->host_end - k->host_start == sizeof (void *));
gomp_copy_host2dev (devicep, aq,
(void *) (tgt->tgt_start
+ k->tgt_offset),
(void *) k->host_start,
sizeof (void *), cbufp);
break;
default:
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("%s: unhandled kind 0x%.2x", __FUNCTION__,
kind);
}
if (k->aux && k->aux->link_key)
{
/* Set link pointer on target to the device address of the
mapped object. */
void *tgt_addr = (void *) (tgt->tgt_start + k->tgt_offset);
/* We intentionally do not use coalescing here, as it's not
data allocated by the current call to this function. */
gomp_copy_host2dev (devicep, aq, (void *) n->tgt_offset,
&tgt_addr, sizeof (void *), NULL);
}
array++;
}
}
}
if (pragma_kind == GOMP_MAP_VARS_TARGET)
{
for (i = 0; i < mapnum; i++)
{
cur_node.tgt_offset = gomp_map_val (tgt, hostaddrs, i);
gomp_copy_host2dev (devicep, aq,
(void *) (tgt->tgt_start + i * sizeof (void *)),
(void *) &cur_node.tgt_offset, sizeof (void *),
cbufp);
}
}
if (cbufp)
{
long c = 0;
for (c = 0; c < cbuf.chunk_cnt; ++c)
gomp_copy_host2dev (devicep, aq,
(void *) (tgt->tgt_start + cbuf.chunks[c].start),
(char *) cbuf.buf + (cbuf.chunks[c].start
- cbuf.chunks[0].start),
cbuf.chunks[c].end - cbuf.chunks[c].start, NULL);
free (cbuf.buf);
cbuf.buf = NULL;
cbufp = NULL;
}
/* If the variable from "omp target enter data" map-list was already mapped,
tgt is not needed. Otherwise tgt will be freed by gomp_unmap_vars or
gomp_exit_data. */
if ((pragma_kind & GOMP_MAP_VARS_ENTER_DATA) && tgt->refcount == 0)
{
free (tgt);
tgt = NULL;
}
gomp_mutex_unlock (&devicep->lock);
return tgt;
}
attribute_hidden struct target_mem_desc *
gomp_map_vars (struct gomp_device_descr *devicep, size_t mapnum,
void **hostaddrs, void **devaddrs, size_t *sizes, void *kinds,
bool short_mapkind, enum gomp_map_vars_kind pragma_kind)
{
return gomp_map_vars_internal (devicep, NULL, mapnum, hostaddrs, devaddrs,
sizes, kinds, short_mapkind, pragma_kind);
}
attribute_hidden struct target_mem_desc *
gomp_map_vars_async (struct gomp_device_descr *devicep,
struct goacc_asyncqueue *aq, size_t mapnum,
void **hostaddrs, void **devaddrs, size_t *sizes,
void *kinds, bool short_mapkind,
enum gomp_map_vars_kind pragma_kind)
{
return gomp_map_vars_internal (devicep, aq, mapnum, hostaddrs, devaddrs,
sizes, kinds, short_mapkind, pragma_kind);
}
static void
gomp_unmap_tgt (struct target_mem_desc *tgt)
{
/* Deallocate on target the tgt->tgt_start .. tgt->tgt_end region. */
if (tgt->tgt_end)
gomp_free_device_memory (tgt->device_descr, tgt->to_free);
free (tgt->array);
free (tgt);
}
static bool
gomp_unref_tgt (void *ptr)
{
bool is_tgt_unmapped = false;
struct target_mem_desc *tgt = (struct target_mem_desc *) ptr;
if (tgt->refcount > 1)
tgt->refcount--;
else
{
gomp_unmap_tgt (tgt);
is_tgt_unmapped = true;
}
return is_tgt_unmapped;
}
static void
gomp_unref_tgt_void (void *ptr)
{
(void) gomp_unref_tgt (ptr);
}
static inline __attribute__((always_inline)) bool
gomp_remove_var_internal (struct gomp_device_descr *devicep, splay_tree_key k,
struct goacc_asyncqueue *aq)
{
bool is_tgt_unmapped = false;
splay_tree_remove (&devicep->mem_map, k);
if (k->aux)
{
if (k->aux->link_key)
splay_tree_insert (&devicep->mem_map,
(splay_tree_node) k->aux->link_key);
if (k->aux->attach_count)
free (k->aux->attach_count);
free (k->aux);
k->aux = NULL;
}
if (aq)
devicep->openacc.async.queue_callback_func (aq, gomp_unref_tgt_void,
(void *) k->tgt);
else
is_tgt_unmapped = gomp_unref_tgt ((void *) k->tgt);
return is_tgt_unmapped;
}
attribute_hidden bool
gomp_remove_var (struct gomp_device_descr *devicep, splay_tree_key k)
{
return gomp_remove_var_internal (devicep, k, NULL);
}
/* Remove a variable asynchronously. This actually removes the variable
mapping immediately, but retains the linked target_mem_desc until the
asynchronous operation has completed (as it may still refer to target
memory). The device lock must be held before entry, and remains locked on
exit. */
attribute_hidden void
gomp_remove_var_async (struct gomp_device_descr *devicep, splay_tree_key k,
struct goacc_asyncqueue *aq)
{
(void) gomp_remove_var_internal (devicep, k, aq);
}
/* Unmap variables described by TGT. If DO_COPYFROM is true, copy relevant
variables back from device to host: if it is false, it is assumed that this
has been done already. */
static inline __attribute__((always_inline)) void
gomp_unmap_vars_internal (struct target_mem_desc *tgt, bool do_copyfrom,
struct goacc_asyncqueue *aq)
{
struct gomp_device_descr *devicep = tgt->device_descr;
if (tgt->list_count == 0)
{
free (tgt);
return;
}
gomp_mutex_lock (&devicep->lock);
if (devicep->state == GOMP_DEVICE_FINALIZED)
{
gomp_mutex_unlock (&devicep->lock);
free (tgt->array);
free (tgt);
return;
}
size_t i;
/* We must perform detachments before any copies back to the host. */
for (i = 0; i < tgt->list_count; i++)
{
splay_tree_key k = tgt->list[i].key;
if (k != NULL && tgt->list[i].is_attach)
gomp_detach_pointer (devicep, aq, k, tgt->list[i].key->host_start
+ tgt->list[i].offset,
false, NULL);
}
for (i = 0; i < tgt->list_count; i++)
{
splay_tree_key k = tgt->list[i].key;
if (k == NULL)
continue;
/* OpenACC 'attach'/'detach' doesn't affect structured/dynamic reference
counts ('n->refcount', 'n->dynamic_refcount'). */
if (tgt->list[i].is_attach)
continue;
bool do_unmap = false;
if (k->refcount > 1 && k->refcount != REFCOUNT_INFINITY)
k->refcount--;
else if (k->refcount == 1)
{
k->refcount--;
do_unmap = true;
}
if ((do_unmap && do_copyfrom && tgt->list[i].copy_from)
|| tgt->list[i].always_copy_from)
gomp_copy_dev2host (devicep, aq,
(void *) (k->host_start + tgt->list[i].offset),
(void *) (k->tgt->tgt_start + k->tgt_offset
+ tgt->list[i].offset),
tgt->list[i].length);
if (do_unmap)
{
struct target_mem_desc *k_tgt = k->tgt;
bool is_tgt_unmapped = gomp_remove_var (devicep, k);
/* It would be bad if TGT got unmapped while we're still iterating
over its LIST_COUNT, and also expect to use it in the following
code. */
assert (!is_tgt_unmapped
|| k_tgt != tgt);
}
}
if (aq)
devicep->openacc.async.queue_callback_func (aq, gomp_unref_tgt_void,
(void *) tgt);
else
gomp_unref_tgt ((void *) tgt);
gomp_mutex_unlock (&devicep->lock);
}
attribute_hidden void
gomp_unmap_vars (struct target_mem_desc *tgt, bool do_copyfrom)
{
gomp_unmap_vars_internal (tgt, do_copyfrom, NULL);
}
attribute_hidden void
gomp_unmap_vars_async (struct target_mem_desc *tgt, bool do_copyfrom,
struct goacc_asyncqueue *aq)
{
gomp_unmap_vars_internal (tgt, do_copyfrom, aq);
}
static void
gomp_update (struct gomp_device_descr *devicep, size_t mapnum, void **hostaddrs,
size_t *sizes, void *kinds, bool short_mapkind)
{
size_t i;
struct splay_tree_key_s cur_node;
const int typemask = short_mapkind ? 0xff : 0x7;
if (!devicep)
return;
if (mapnum == 0)
return;
gomp_mutex_lock (&devicep->lock);
if (devicep->state == GOMP_DEVICE_FINALIZED)
{
gomp_mutex_unlock (&devicep->lock);
return;
}
for (i = 0; i < mapnum; i++)
if (sizes[i])
{
cur_node.host_start = (uintptr_t) hostaddrs[i];
cur_node.host_end = cur_node.host_start + sizes[i];
splay_tree_key n = splay_tree_lookup (&devicep->mem_map, &cur_node);
if (n)
{
int kind = get_kind (short_mapkind, kinds, i);
if (n->host_start > cur_node.host_start
|| n->host_end < cur_node.host_end)
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("Trying to update [%p..%p) object when "
"only [%p..%p) is mapped",
(void *) cur_node.host_start,
(void *) cur_node.host_end,
(void *) n->host_start,
(void *) n->host_end);
}
void *hostaddr = (void *) cur_node.host_start;
void *devaddr = (void *) (n->tgt->tgt_start + n->tgt_offset
+ cur_node.host_start - n->host_start);
size_t size = cur_node.host_end - cur_node.host_start;
if (GOMP_MAP_COPY_TO_P (kind & typemask))
gomp_copy_host2dev (devicep, NULL, devaddr, hostaddr, size,
NULL);
if (GOMP_MAP_COPY_FROM_P (kind & typemask))
gomp_copy_dev2host (devicep, NULL, hostaddr, devaddr, size);
}
}
gomp_mutex_unlock (&devicep->lock);
}
/* Load image pointed by TARGET_DATA to the device, specified by DEVICEP.
And insert to splay tree the mapping between addresses from HOST_TABLE and
from loaded target image. We rely in the host and device compiler
emitting variable and functions in the same order. */
static void
gomp_load_image_to_device (struct gomp_device_descr *devicep, unsigned version,
const void *host_table, const void *target_data,
bool is_register_lock)
{
void **host_func_table = ((void ***) host_table)[0];
void **host_funcs_end = ((void ***) host_table)[1];
void **host_var_table = ((void ***) host_table)[2];
void **host_vars_end = ((void ***) host_table)[3];
/* The func table contains only addresses, the var table contains addresses
and corresponding sizes. */
int num_funcs = host_funcs_end - host_func_table;
int num_vars = (host_vars_end - host_var_table) / 2;
/* Load image to device and get target addresses for the image. */
struct addr_pair *target_table = NULL;
int i, num_target_entries;
num_target_entries
= devicep->load_image_func (devicep->target_id, version,
target_data, &target_table);
if (num_target_entries != num_funcs + num_vars)
{
gomp_mutex_unlock (&devicep->lock);
if (is_register_lock)
gomp_mutex_unlock (&register_lock);
gomp_fatal ("Cannot map target functions or variables"
" (expected %u, have %u)", num_funcs + num_vars,
num_target_entries);
}
/* Insert host-target address mapping into splay tree. */
struct target_mem_desc *tgt = gomp_malloc (sizeof (*tgt));
tgt->array = gomp_malloc ((num_funcs + num_vars) * sizeof (*tgt->array));
tgt->refcount = REFCOUNT_INFINITY;
tgt->tgt_start = 0;
tgt->tgt_end = 0;
tgt->to_free = NULL;
tgt->prev = NULL;
tgt->list_count = 0;
tgt->device_descr = devicep;
splay_tree_node array = tgt->array;
for (i = 0; i < num_funcs; i++)
{
splay_tree_key k = &array->key;
k->host_start = (uintptr_t) host_func_table[i];
k->host_end = k->host_start + 1;
k->tgt = tgt;
k->tgt_offset = target_table[i].start;
k->refcount = REFCOUNT_INFINITY;
k->dynamic_refcount = 0;
k->aux = NULL;
array->left = NULL;
array->right = NULL;
splay_tree_insert (&devicep->mem_map, array);
array++;
}
/* Most significant bit of the size in host and target tables marks
"omp declare target link" variables. */
const uintptr_t link_bit = 1ULL << (sizeof (uintptr_t) * __CHAR_BIT__ - 1);
const uintptr_t size_mask = ~link_bit;
for (i = 0; i < num_vars; i++)
{
struct addr_pair *target_var = &target_table[num_funcs + i];
uintptr_t target_size = target_var->end - target_var->start;
bool is_link_var = link_bit & (uintptr_t) host_var_table[i * 2 + 1];
if (!is_link_var && (uintptr_t) host_var_table[i * 2 + 1] != target_size)
{
gomp_mutex_unlock (&devicep->lock);
if (is_register_lock)
gomp_mutex_unlock (&register_lock);
gomp_fatal ("Cannot map target variables (size mismatch)");
}
splay_tree_key k = &array->key;
k->host_start = (uintptr_t) host_var_table[i * 2];
k->host_end
= k->host_start + (size_mask & (uintptr_t) host_var_table[i * 2 + 1]);
k->tgt = tgt;
k->tgt_offset = target_var->start;
k->refcount = is_link_var ? REFCOUNT_LINK : REFCOUNT_INFINITY;
k->dynamic_refcount = 0;
k->aux = NULL;
array->left = NULL;
array->right = NULL;
splay_tree_insert (&devicep->mem_map, array);
array++;
}
free (target_table);
}
/* Unload the mappings described by target_data from device DEVICE_P.
The device must be locked. */
static void
gomp_unload_image_from_device (struct gomp_device_descr *devicep,
unsigned version,
const void *host_table, const void *target_data)
{
void **host_func_table = ((void ***) host_table)[0];
void **host_funcs_end = ((void ***) host_table)[1];
void **host_var_table = ((void ***) host_table)[2];
void **host_vars_end = ((void ***) host_table)[3];
/* The func table contains only addresses, the var table contains addresses
and corresponding sizes. */
int num_funcs = host_funcs_end - host_func_table;
int num_vars = (host_vars_end - host_var_table) / 2;
struct splay_tree_key_s k;
splay_tree_key node = NULL;
/* Find mapping at start of node array */
if (num_funcs || num_vars)
{
k.host_start = (num_funcs ? (uintptr_t) host_func_table[0]
: (uintptr_t) host_var_table[0]);
k.host_end = k.host_start + 1;
node = splay_tree_lookup (&devicep->mem_map, &k);
}
if (!devicep->unload_image_func (devicep->target_id, version, target_data))
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("image unload fail");
}
/* Remove mappings from splay tree. */
int i;
for (i = 0; i < num_funcs; i++)
{
k.host_start = (uintptr_t) host_func_table[i];
k.host_end = k.host_start + 1;
splay_tree_remove (&devicep->mem_map, &k);
}
/* Most significant bit of the size in host and target tables marks
"omp declare target link" variables. */
const uintptr_t link_bit = 1ULL << (sizeof (uintptr_t) * __CHAR_BIT__ - 1);
const uintptr_t size_mask = ~link_bit;
bool is_tgt_unmapped = false;
for (i = 0; i < num_vars; i++)
{
k.host_start = (uintptr_t) host_var_table[i * 2];
k.host_end
= k.host_start + (size_mask & (uintptr_t) host_var_table[i * 2 + 1]);
if (!(link_bit & (uintptr_t) host_var_table[i * 2 + 1]))
splay_tree_remove (&devicep->mem_map, &k);
else
{
splay_tree_key n = splay_tree_lookup (&devicep->mem_map, &k);
is_tgt_unmapped = gomp_remove_var (devicep, n);
}
}
if (node && !is_tgt_unmapped)
{
free (node->tgt);
free (node);
}
}
/* This function should be called from every offload image while loading.
It gets the descriptor of the host func and var tables HOST_TABLE, TYPE of
the target, and TARGET_DATA needed by target plugin. */
void
GOMP_offload_register_ver (unsigned version, const void *host_table,
int target_type, const void *target_data)
{
int i;
if (GOMP_VERSION_LIB (version) > GOMP_VERSION)
gomp_fatal ("Library too old for offload (version %u < %u)",
GOMP_VERSION, GOMP_VERSION_LIB (version));
gomp_mutex_lock (&register_lock);
/* Load image to all initialized devices. */
for (i = 0; i < num_devices; i++)
{
struct gomp_device_descr *devicep = &devices[i];
gomp_mutex_lock (&devicep->lock);
if (devicep->type == target_type
&& devicep->state == GOMP_DEVICE_INITIALIZED)
gomp_load_image_to_device (devicep, version,
host_table, target_data, true);
gomp_mutex_unlock (&devicep->lock);
}
/* Insert image to array of pending images. */
offload_images
= gomp_realloc_unlock (offload_images,
(num_offload_images + 1)
* sizeof (struct offload_image_descr));
offload_images[num_offload_images].version = version;
offload_images[num_offload_images].type = target_type;
offload_images[num_offload_images].host_table = host_table;
offload_images[num_offload_images].target_data = target_data;
num_offload_images++;
gomp_mutex_unlock (&register_lock);
}
void
GOMP_offload_register (const void *host_table, int target_type,
const void *target_data)
{
GOMP_offload_register_ver (0, host_table, target_type, target_data);
}
/* This function should be called from every offload image while unloading.
It gets the descriptor of the host func and var tables HOST_TABLE, TYPE of
the target, and TARGET_DATA needed by target plugin. */
void
GOMP_offload_unregister_ver (unsigned version, const void *host_table,
int target_type, const void *target_data)
{
int i;
gomp_mutex_lock (&register_lock);
/* Unload image from all initialized devices. */
for (i = 0; i < num_devices; i++)
{
struct gomp_device_descr *devicep = &devices[i];
gomp_mutex_lock (&devicep->lock);
if (devicep->type == target_type
&& devicep->state == GOMP_DEVICE_INITIALIZED)
gomp_unload_image_from_device (devicep, version,
host_table, target_data);
gomp_mutex_unlock (&devicep->lock);
}
/* Remove image from array of pending images. */
for (i = 0; i < num_offload_images; i++)
if (offload_images[i].target_data == target_data)
{
offload_images[i] = offload_images[--num_offload_images];
break;
}
gomp_mutex_unlock (&register_lock);
}
void
GOMP_offload_unregister (const void *host_table, int target_type,
const void *target_data)
{
GOMP_offload_unregister_ver (0, host_table, target_type, target_data);
}
/* This function initializes the target device, specified by DEVICEP. DEVICEP
must be locked on entry, and remains locked on return. */
attribute_hidden void
gomp_init_device (struct gomp_device_descr *devicep)
{
int i;
if (!devicep->init_device_func (devicep->target_id))
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("device initialization failed");
}
/* Load to device all images registered by the moment. */
for (i = 0; i < num_offload_images; i++)
{
struct offload_image_descr *image = &offload_images[i];
if (image->type == devicep->type)
gomp_load_image_to_device (devicep, image->version,
image->host_table, image->target_data,
false);
}
/* Initialize OpenACC asynchronous queues. */
goacc_init_asyncqueues (devicep);
devicep->state = GOMP_DEVICE_INITIALIZED;
}
/* This function finalizes the target device, specified by DEVICEP. DEVICEP
must be locked on entry, and remains locked on return. */
attribute_hidden bool
gomp_fini_device (struct gomp_device_descr *devicep)
{
bool ret = goacc_fini_asyncqueues (devicep);
ret &= devicep->fini_device_func (devicep->target_id);
devicep->state = GOMP_DEVICE_FINALIZED;
return ret;
}
attribute_hidden void
gomp_unload_device (struct gomp_device_descr *devicep)
{
if (devicep->state == GOMP_DEVICE_INITIALIZED)
{
unsigned i;
/* Unload from device all images registered at the moment. */
for (i = 0; i < num_offload_images; i++)
{
struct offload_image_descr *image = &offload_images[i];
if (image->type == devicep->type)
gomp_unload_image_from_device (devicep, image->version,
image->host_table,
image->target_data);
}
}
}
/* Host fallback for GOMP_target{,_ext} routines. */
static void
gomp_target_fallback (void (*fn) (void *), void **hostaddrs,
struct gomp_device_descr *devicep)
{
struct gomp_thread old_thr, *thr = gomp_thread ();
if (gomp_target_offload_var == GOMP_TARGET_OFFLOAD_MANDATORY
&& devicep != NULL)
gomp_fatal ("OMP_TARGET_OFFLOAD is set to MANDATORY, but device cannot "
"be used for offloading");
old_thr = *thr;
memset (thr, '\0', sizeof (*thr));
if (gomp_places_list)
{
thr->place = old_thr.place;
thr->ts.place_partition_len = gomp_places_list_len;
}
fn (hostaddrs);
gomp_free_thread (thr);
*thr = old_thr;
}
/* Calculate alignment and size requirements of a private copy of data shared
as GOMP_MAP_FIRSTPRIVATE and store them to TGT_ALIGN and TGT_SIZE. */
static inline void
calculate_firstprivate_requirements (size_t mapnum, size_t *sizes,
unsigned short *kinds, size_t *tgt_align,
size_t *tgt_size)
{
size_t i;
for (i = 0; i < mapnum; i++)
if ((kinds[i] & 0xff) == GOMP_MAP_FIRSTPRIVATE)
{
size_t align = (size_t) 1 << (kinds[i] >> 8);
if (*tgt_align < align)
*tgt_align = align;
*tgt_size = (*tgt_size + align - 1) & ~(align - 1);
*tgt_size += sizes[i];
}
}
/* Copy data shared as GOMP_MAP_FIRSTPRIVATE to DST. */
static inline void
copy_firstprivate_data (char *tgt, size_t mapnum, void **hostaddrs,
size_t *sizes, unsigned short *kinds, size_t tgt_align,
size_t tgt_size)
{
uintptr_t al = (uintptr_t) tgt & (tgt_align - 1);
if (al)
tgt += tgt_align - al;
tgt_size = 0;
size_t i;
for (i = 0; i < mapnum; i++)
if ((kinds[i] & 0xff) == GOMP_MAP_FIRSTPRIVATE)
{
size_t align = (size_t) 1 << (kinds[i] >> 8);
tgt_size = (tgt_size + align - 1) & ~(align - 1);
memcpy (tgt + tgt_size, hostaddrs[i], sizes[i]);
hostaddrs[i] = tgt + tgt_size;
tgt_size = tgt_size + sizes[i];
}
}
/* Helper function of GOMP_target{,_ext} routines. */
static void *
gomp_get_target_fn_addr (struct gomp_device_descr *devicep,
void (*host_fn) (void *))
{
if (devicep->capabilities & GOMP_OFFLOAD_CAP_NATIVE_EXEC)
return (void *) host_fn;
else
{
gomp_mutex_lock (&devicep->lock);
if (devicep->state == GOMP_DEVICE_FINALIZED)
{
gomp_mutex_unlock (&devicep->lock);
return NULL;
}
struct splay_tree_key_s k;
k.host_start = (uintptr_t) host_fn;
k.host_end = k.host_start + 1;
splay_tree_key tgt_fn = splay_tree_lookup (&devicep->mem_map, &k);
gomp_mutex_unlock (&devicep->lock);
if (tgt_fn == NULL)
return NULL;
return (void *) tgt_fn->tgt_offset;
}
}
/* Called when encountering a target directive. If DEVICE
is GOMP_DEVICE_ICV, it means use device-var ICV. If it is
GOMP_DEVICE_HOST_FALLBACK (or any value
larger than last available hw device), use host fallback.
FN is address of host code, UNUSED is part of the current ABI, but
we're not actually using it. HOSTADDRS, SIZES and KINDS are arrays
with MAPNUM entries, with addresses of the host objects,
sizes of the host objects (resp. for pointer kind pointer bias
and assumed sizeof (void *) size) and kinds. */
void
GOMP_target (int device, void (*fn) (void *), const void *unused,
size_t mapnum, void **hostaddrs, size_t *sizes,
unsigned char *kinds)
{
struct gomp_device_descr *devicep = resolve_device (device);
void *fn_addr;
if (devicep == NULL
|| !(devicep->capabilities & GOMP_OFFLOAD_CAP_OPENMP_400)
/* All shared memory devices should use the GOMP_target_ext function. */
|| devicep->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM
|| !(fn_addr = gomp_get_target_fn_addr (devicep, fn)))
return gomp_target_fallback (fn, hostaddrs, devicep);
struct target_mem_desc *tgt_vars
= gomp_map_vars (devicep, mapnum, hostaddrs, NULL, sizes, kinds, false,
GOMP_MAP_VARS_TARGET);
devicep->run_func (devicep->target_id, fn_addr, (void *) tgt_vars->tgt_start,
NULL);
gomp_unmap_vars (tgt_vars, true);
}
static inline unsigned int
clear_unsupported_flags (struct gomp_device_descr *devicep, unsigned int flags)
{
/* If we cannot run asynchronously, simply ignore nowait. */
if (devicep != NULL && devicep->async_run_func == NULL)
flags &= ~GOMP_TARGET_FLAG_NOWAIT;
return flags;
}
/* Like GOMP_target, but KINDS is 16-bit, UNUSED is no longer present,
and several arguments have been added:
FLAGS is a bitmask, see GOMP_TARGET_FLAG_* in gomp-constants.h.
DEPEND is array of dependencies, see GOMP_task for details.
ARGS is a pointer to an array consisting of a variable number of both
device-independent and device-specific arguments, which can take one two
elements where the first specifies for which device it is intended, the type
and optionally also the value. If the value is not present in the first
one, the whole second element the actual value. The last element of the
array is a single NULL. Among the device independent can be for example
NUM_TEAMS and THREAD_LIMIT.
NUM_TEAMS is positive if GOMP_teams will be called in the body with
that value, or 1 if teams construct is not present, or 0, if
teams construct does not have num_teams clause and so the choice is
implementation defined, and -1 if it can't be determined on the host
what value will GOMP_teams have on the device.
THREAD_LIMIT similarly is positive if GOMP_teams will be called in the
body with that value, or 0, if teams construct does not have thread_limit
clause or the teams construct is not present, or -1 if it can't be
determined on the host what value will GOMP_teams have on the device. */
void
GOMP_target_ext (int device, void (*fn) (void *), size_t mapnum,
void **hostaddrs, size_t *sizes, unsigned short *kinds,
unsigned int flags, void **depend, void **args)
{
struct gomp_device_descr *devicep = resolve_device (device);
size_t tgt_align = 0, tgt_size = 0;
bool fpc_done = false;
flags = clear_unsupported_flags (devicep, flags);
if (flags & GOMP_TARGET_FLAG_NOWAIT)
{
struct gomp_thread *thr = gomp_thread ();
/* Create a team if we don't have any around, as nowait
target tasks make sense to run asynchronously even when
outside of any parallel. */
if (__builtin_expect (thr->ts.team == NULL, 0))
{
struct gomp_team *team = gomp_new_team (1);
struct gomp_task *task = thr->task;
struct gomp_task_icv *icv = task ? &task->icv : &gomp_global_icv;
team->prev_ts = thr->ts;
thr->ts.team = team;
thr->ts.team_id = 0;
thr->ts.work_share = &team->work_shares[0];
thr->ts.last_work_share = NULL;
#ifdef HAVE_SYNC_BUILTINS
thr->ts.single_count = 0;
#endif
thr->ts.static_trip = 0;
thr->task = &team->implicit_task[0];
gomp_init_task (thr->task, NULL, icv);
if (task)
{
thr->task = task;
gomp_end_task ();
free (task);
thr->task = &team->implicit_task[0];
}
else
pthread_setspecific (gomp_thread_destructor, thr);
}
if (thr->ts.team
&& !thr->task->final_task)
{
gomp_create_target_task (devicep, fn, mapnum, hostaddrs,
sizes, kinds, flags, depend, args,
GOMP_TARGET_TASK_BEFORE_MAP);
return;
}
}
/* If there are depend clauses, but nowait is not present
(or we are in a final task), block the parent task until the
dependencies are resolved and then just continue with the rest
of the function as if it is a merged task. */
if (depend != NULL)
{
struct gomp_thread *thr = gomp_thread ();
if (thr->task && thr->task->depend_hash)
{
/* If we might need to wait, copy firstprivate now. */
calculate_firstprivate_requirements (mapnum, sizes, kinds,
&tgt_align, &tgt_size);
if (tgt_align)
{
char *tgt = gomp_alloca (tgt_size + tgt_align - 1);
copy_firstprivate_data (tgt, mapnum, hostaddrs, sizes, kinds,
tgt_align, tgt_size);
}
fpc_done = true;
gomp_task_maybe_wait_for_dependencies (depend);
}
}
void *fn_addr;
if (devicep == NULL
|| !(devicep->capabilities & GOMP_OFFLOAD_CAP_OPENMP_400)
|| !(fn_addr = gomp_get_target_fn_addr (devicep, fn))
|| (devicep->can_run_func && !devicep->can_run_func (fn_addr)))
{
if (!fpc_done)
{
calculate_firstprivate_requirements (mapnum, sizes, kinds,
&tgt_align, &tgt_size);
if (tgt_align)
{
char *tgt = gomp_alloca (tgt_size + tgt_align - 1);
copy_firstprivate_data (tgt, mapnum, hostaddrs, sizes, kinds,
tgt_align, tgt_size);
}
}
gomp_target_fallback (fn, hostaddrs, devicep);
return;
}
struct target_mem_desc *tgt_vars;
if (devicep->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
{
if (!fpc_done)
{
calculate_firstprivate_requirements (mapnum, sizes, kinds,
&tgt_align, &tgt_size);
if (tgt_align)
{
char *tgt = gomp_alloca (tgt_size + tgt_align - 1);
copy_firstprivate_data (tgt, mapnum, hostaddrs, sizes, kinds,
tgt_align, tgt_size);
}
}
tgt_vars = NULL;
}
else
tgt_vars = gomp_map_vars (devicep, mapnum, hostaddrs, NULL, sizes, kinds,
true, GOMP_MAP_VARS_TARGET);
devicep->run_func (devicep->target_id, fn_addr,
tgt_vars ? (void *) tgt_vars->tgt_start : hostaddrs,
args);
if (tgt_vars)
gomp_unmap_vars (tgt_vars, true);
}
/* Host fallback for GOMP_target_data{,_ext} routines. */
static void
gomp_target_data_fallback (struct gomp_device_descr *devicep)
{
struct gomp_task_icv *icv = gomp_icv (false);
if (gomp_target_offload_var == GOMP_TARGET_OFFLOAD_MANDATORY
&& devicep != NULL)
gomp_fatal ("OMP_TARGET_OFFLOAD is set to MANDATORY, but device cannot "
"be used for offloading");
if (icv->target_data)
{
/* Even when doing a host fallback, if there are any active
#pragma omp target data constructs, need to remember the
new #pragma omp target data, otherwise GOMP_target_end_data
would get out of sync. */
struct target_mem_desc *tgt
= gomp_map_vars (NULL, 0, NULL, NULL, NULL, NULL, false,
GOMP_MAP_VARS_DATA);
tgt->prev = icv->target_data;
icv->target_data = tgt;
}
}
void
GOMP_target_data (int device, const void *unused, size_t mapnum,
void **hostaddrs, size_t *sizes, unsigned char *kinds)
{
struct gomp_device_descr *devicep = resolve_device (device);
if (devicep == NULL
|| !(devicep->capabilities & GOMP_OFFLOAD_CAP_OPENMP_400)
|| (devicep->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM))
return gomp_target_data_fallback (devicep);
struct target_mem_desc *tgt
= gomp_map_vars (devicep, mapnum, hostaddrs, NULL, sizes, kinds, false,
GOMP_MAP_VARS_DATA);
struct gomp_task_icv *icv = gomp_icv (true);
tgt->prev = icv->target_data;
icv->target_data = tgt;
}
void
GOMP_target_data_ext (int device, size_t mapnum, void **hostaddrs,
size_t *sizes, unsigned short *kinds)
{
struct gomp_device_descr *devicep = resolve_device (device);
if (devicep == NULL
|| !(devicep->capabilities & GOMP_OFFLOAD_CAP_OPENMP_400)
|| devicep->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
return gomp_target_data_fallback (devicep);
struct target_mem_desc *tgt
= gomp_map_vars (devicep, mapnum, hostaddrs, NULL, sizes, kinds, true,
GOMP_MAP_VARS_DATA);
struct gomp_task_icv *icv = gomp_icv (true);
tgt->prev = icv->target_data;
icv->target_data = tgt;
}
void
GOMP_target_end_data (void)
{
struct gomp_task_icv *icv = gomp_icv (false);
if (icv->target_data)
{
struct target_mem_desc *tgt = icv->target_data;
icv->target_data = tgt->prev;
gomp_unmap_vars (tgt, true);
}
}
void
GOMP_target_update (int device, const void *unused, size_t mapnum,
void **hostaddrs, size_t *sizes, unsigned char *kinds)
{
struct gomp_device_descr *devicep = resolve_device (device);
if (devicep == NULL
|| !(devicep->capabilities & GOMP_OFFLOAD_CAP_OPENMP_400)
|| devicep->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
return;
gomp_update (devicep, mapnum, hostaddrs, sizes, kinds, false);
}
void
GOMP_target_update_ext (int device, size_t mapnum, void **hostaddrs,
size_t *sizes, unsigned short *kinds,
unsigned int flags, void **depend)
{
struct gomp_device_descr *devicep = resolve_device (device);
/* If there are depend clauses, but nowait is not present,
block the parent task until the dependencies are resolved
and then just continue with the rest of the function as if it
is a merged task. Until we are able to schedule task during
variable mapping or unmapping, ignore nowait if depend clauses
are not present. */
if (depend != NULL)
{
struct gomp_thread *thr = gomp_thread ();
if (thr->task && thr->task->depend_hash)
{
if ((flags & GOMP_TARGET_FLAG_NOWAIT)
&& thr->ts.team
&& !thr->task->final_task)
{
if (gomp_create_target_task (devicep, (void (*) (void *)) NULL,
mapnum, hostaddrs, sizes, kinds,
flags | GOMP_TARGET_FLAG_UPDATE,
depend, NULL, GOMP_TARGET_TASK_DATA))
return;
}
else
{
struct gomp_team *team = thr->ts.team;
/* If parallel or taskgroup has been cancelled, don't start new
tasks. */
if (__builtin_expect (gomp_cancel_var, 0) && team)
{
if (gomp_team_barrier_cancelled (&team->barrier))
return;
if (thr->task->taskgroup)
{
if (thr->task->taskgroup->cancelled)
return;
if (thr->task->taskgroup->workshare
&& thr->task->taskgroup->prev
&& thr->task->taskgroup->prev->cancelled)
return;
}
}
gomp_task_maybe_wait_for_dependencies (depend);
}
}
}
if (devicep == NULL
|| !(devicep->capabilities & GOMP_OFFLOAD_CAP_OPENMP_400)
|| devicep->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
return;
struct gomp_thread *thr = gomp_thread ();
struct gomp_team *team = thr->ts.team;
/* If parallel or taskgroup has been cancelled, don't start new tasks. */
if (__builtin_expect (gomp_cancel_var, 0) && team)
{
if (gomp_team_barrier_cancelled (&team->barrier))
return;
if (thr->task->taskgroup)
{
if (thr->task->taskgroup->cancelled)
return;
if (thr->task->taskgroup->workshare
&& thr->task->taskgroup->prev
&& thr->task->taskgroup->prev->cancelled)
return;
}
}
gomp_update (devicep, mapnum, hostaddrs, sizes, kinds, true);
}
static void
gomp_exit_data (struct gomp_device_descr *devicep, size_t mapnum,
void **hostaddrs, size_t *sizes, unsigned short *kinds)
{
const int typemask = 0xff;
size_t i;
gomp_mutex_lock (&devicep->lock);
if (devicep->state == GOMP_DEVICE_FINALIZED)
{
gomp_mutex_unlock (&devicep->lock);
return;
}
for (i = 0; i < mapnum; i++)
if ((kinds[i] & typemask) == GOMP_MAP_DETACH)
{
struct splay_tree_key_s cur_node;
cur_node.host_start = (uintptr_t) hostaddrs[i];
cur_node.host_end = cur_node.host_start + sizeof (void *);
splay_tree_key n = splay_tree_lookup (&devicep->mem_map, &cur_node);
if (n)
gomp_detach_pointer (devicep, NULL, n, (uintptr_t) hostaddrs[i],
false, NULL);
}
for (i = 0; i < mapnum; i++)
{
struct splay_tree_key_s cur_node;
unsigned char kind = kinds[i] & typemask;
switch (kind)
{
case GOMP_MAP_FROM:
case GOMP_MAP_ALWAYS_FROM:
case GOMP_MAP_DELETE:
case GOMP_MAP_RELEASE:
case GOMP_MAP_ZERO_LEN_ARRAY_SECTION:
case GOMP_MAP_DELETE_ZERO_LEN_ARRAY_SECTION:
cur_node.host_start = (uintptr_t) hostaddrs[i];
cur_node.host_end = cur_node.host_start + sizes[i];
splay_tree_key k = (kind == GOMP_MAP_DELETE_ZERO_LEN_ARRAY_SECTION
|| kind == GOMP_MAP_ZERO_LEN_ARRAY_SECTION)
? gomp_map_0len_lookup (&devicep->mem_map, &cur_node)
: splay_tree_lookup (&devicep->mem_map, &cur_node);
if (!k)
continue;
if (k->refcount > 0 && k->refcount != REFCOUNT_INFINITY)
k->refcount--;
if ((kind == GOMP_MAP_DELETE
|| kind == GOMP_MAP_DELETE_ZERO_LEN_ARRAY_SECTION)
&& k->refcount != REFCOUNT_INFINITY)
k->refcount = 0;
if ((kind == GOMP_MAP_FROM && k->refcount == 0)
|| kind == GOMP_MAP_ALWAYS_FROM)
gomp_copy_dev2host (devicep, NULL, (void *) cur_node.host_start,
(void *) (k->tgt->tgt_start + k->tgt_offset
+ cur_node.host_start
- k->host_start),
cur_node.host_end - cur_node.host_start);
if (k->refcount == 0)
gomp_remove_var (devicep, k);
break;
case GOMP_MAP_DETACH:
break;
default:
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("GOMP_target_enter_exit_data unhandled kind 0x%.2x",
kind);
}
}
gomp_mutex_unlock (&devicep->lock);
}
void
GOMP_target_enter_exit_data (int device, size_t mapnum, void **hostaddrs,
size_t *sizes, unsigned short *kinds,
unsigned int flags, void **depend)
{
struct gomp_device_descr *devicep = resolve_device (device);
/* If there are depend clauses, but nowait is not present,
block the parent task until the dependencies are resolved
and then just continue with the rest of the function as if it
is a merged task. Until we are able to schedule task during
variable mapping or unmapping, ignore nowait if depend clauses
are not present. */
if (depend != NULL)
{
struct gomp_thread *thr = gomp_thread ();
if (thr->task && thr->task->depend_hash)
{
if ((flags & GOMP_TARGET_FLAG_NOWAIT)
&& thr->ts.team
&& !thr->task->final_task)
{
if (gomp_create_target_task (devicep, (void (*) (void *)) NULL,
mapnum, hostaddrs, sizes, kinds,
flags, depend, NULL,
GOMP_TARGET_TASK_DATA))
return;
}
else
{
struct gomp_team *team = thr->ts.team;
/* If parallel or taskgroup has been cancelled, don't start new
tasks. */
if (__builtin_expect (gomp_cancel_var, 0) && team)
{
if (gomp_team_barrier_cancelled (&team->barrier))
return;
if (thr->task->taskgroup)
{
if (thr->task->taskgroup->cancelled)
return;
if (thr->task->taskgroup->workshare
&& thr->task->taskgroup->prev
&& thr->task->taskgroup->prev->cancelled)
return;
}
}
gomp_task_maybe_wait_for_dependencies (depend);
}
}
}
if (devicep == NULL
|| !(devicep->capabilities & GOMP_OFFLOAD_CAP_OPENMP_400)
|| devicep->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
return;
struct gomp_thread *thr = gomp_thread ();
struct gomp_team *team = thr->ts.team;
/* If parallel or taskgroup has been cancelled, don't start new tasks. */
if (__builtin_expect (gomp_cancel_var, 0) && team)
{
if (gomp_team_barrier_cancelled (&team->barrier))
return;
if (thr->task->taskgroup)
{
if (thr->task->taskgroup->cancelled)
return;
if (thr->task->taskgroup->workshare
&& thr->task->taskgroup->prev
&& thr->task->taskgroup->prev->cancelled)
return;
}
}
/* The variables are mapped separately such that they can be released
independently. */
size_t i, j;
if ((flags & GOMP_TARGET_FLAG_EXIT_DATA) == 0)
for (i = 0; i < mapnum; i++)
if ((kinds[i] & 0xff) == GOMP_MAP_STRUCT)
{
gomp_map_vars (devicep, sizes[i] + 1, &hostaddrs[i], NULL, &sizes[i],
&kinds[i], true, GOMP_MAP_VARS_ENTER_DATA);
i += sizes[i];
}
else if ((kinds[i] & 0xff) == GOMP_MAP_TO_PSET)
{
for (j = i + 1; j < mapnum; j++)
if (!GOMP_MAP_POINTER_P (get_kind (true, kinds, j) & 0xff)
&& !GOMP_MAP_ALWAYS_POINTER_P (get_kind (true, kinds, j) & 0xff))
break;
gomp_map_vars (devicep, j-i, &hostaddrs[i], NULL, &sizes[i],
&kinds[i], true, GOMP_MAP_VARS_ENTER_DATA);
i += j - i - 1;
}
else if (i + 1 < mapnum && (kinds[i + 1] & 0xff) == GOMP_MAP_ATTACH)
{
/* An attach operation must be processed together with the mapped
base-pointer list item. */
gomp_map_vars (devicep, 2, &hostaddrs[i], NULL, &sizes[i], &kinds[i],
true, GOMP_MAP_VARS_ENTER_DATA);
i += 1;
}
else
gomp_map_vars (devicep, 1, &hostaddrs[i], NULL, &sizes[i], &kinds[i],
true, GOMP_MAP_VARS_ENTER_DATA);
else
gomp_exit_data (devicep, mapnum, hostaddrs, sizes, kinds);
}
bool
gomp_target_task_fn (void *data)
{
struct gomp_target_task *ttask = (struct gomp_target_task *) data;
struct gomp_device_descr *devicep = ttask->devicep;
if (ttask->fn != NULL)
{
void *fn_addr;
if (devicep == NULL
|| !(devicep->capabilities & GOMP_OFFLOAD_CAP_OPENMP_400)
|| !(fn_addr = gomp_get_target_fn_addr (devicep, ttask->fn))
|| (devicep->can_run_func && !devicep->can_run_func (fn_addr)))
{
ttask->state = GOMP_TARGET_TASK_FALLBACK;
gomp_target_fallback (ttask->fn, ttask->hostaddrs, devicep);
return false;
}
if (ttask->state == GOMP_TARGET_TASK_FINISHED)
{
if (ttask->tgt)
gomp_unmap_vars (ttask->tgt, true);
return false;
}
void *actual_arguments;
if (devicep->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
{
ttask->tgt = NULL;
actual_arguments = ttask->hostaddrs;
}
else
{
ttask->tgt = gomp_map_vars (devicep, ttask->mapnum, ttask->hostaddrs,
NULL, ttask->sizes, ttask->kinds, true,
GOMP_MAP_VARS_TARGET);
actual_arguments = (void *) ttask->tgt->tgt_start;
}
ttask->state = GOMP_TARGET_TASK_READY_TO_RUN;
assert (devicep->async_run_func);
devicep->async_run_func (devicep->target_id, fn_addr, actual_arguments,
ttask->args, (void *) ttask);
return true;
}
else if (devicep == NULL
|| !(devicep->capabilities & GOMP_OFFLOAD_CAP_OPENMP_400)
|| devicep->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
return false;
size_t i;
if (ttask->flags & GOMP_TARGET_FLAG_UPDATE)
gomp_update (devicep, ttask->mapnum, ttask->hostaddrs, ttask->sizes,
ttask->kinds, true);
else if ((ttask->flags & GOMP_TARGET_FLAG_EXIT_DATA) == 0)
for (i = 0; i < ttask->mapnum; i++)
if ((ttask->kinds[i] & 0xff) == GOMP_MAP_STRUCT)
{
gomp_map_vars (devicep, ttask->sizes[i] + 1, &ttask->hostaddrs[i],
NULL, &ttask->sizes[i], &ttask->kinds[i], true,
GOMP_MAP_VARS_ENTER_DATA);
i += ttask->sizes[i];
}
else
gomp_map_vars (devicep, 1, &ttask->hostaddrs[i], NULL, &ttask->sizes[i],
&ttask->kinds[i], true, GOMP_MAP_VARS_ENTER_DATA);
else
gomp_exit_data (devicep, ttask->mapnum, ttask->hostaddrs, ttask->sizes,
ttask->kinds);
return false;
}
void
GOMP_teams (unsigned int num_teams, unsigned int thread_limit)
{
if (thread_limit)
{
struct gomp_task_icv *icv = gomp_icv (true);
icv->thread_limit_var
= thread_limit > INT_MAX ? UINT_MAX : thread_limit;
}
(void) num_teams;
}
void *
omp_target_alloc (size_t size, int device_num)
{
if (device_num == gomp_get_num_devices ())
return malloc (size);
if (device_num < 0)
return NULL;
struct gomp_device_descr *devicep = resolve_device (device_num);
if (devicep == NULL)
return NULL;
if (!(devicep->capabilities & GOMP_OFFLOAD_CAP_OPENMP_400)
|| devicep->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
return malloc (size);
gomp_mutex_lock (&devicep->lock);
void *ret = devicep->alloc_func (devicep->target_id, size);
gomp_mutex_unlock (&devicep->lock);
return ret;
}
void
omp_target_free (void *device_ptr, int device_num)
{
if (device_ptr == NULL)
return;
if (device_num == gomp_get_num_devices ())
{
free (device_ptr);
return;
}
if (device_num < 0)
return;
struct gomp_device_descr *devicep = resolve_device (device_num);
if (devicep == NULL)
return;
if (!(devicep->capabilities & GOMP_OFFLOAD_CAP_OPENMP_400)
|| devicep->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
{
free (device_ptr);
return;
}
gomp_mutex_lock (&devicep->lock);
gomp_free_device_memory (devicep, device_ptr);
gomp_mutex_unlock (&devicep->lock);
}
int
omp_target_is_present (const void *ptr, int device_num)
{
if (ptr == NULL)
return 1;
if (device_num == gomp_get_num_devices ())
return 1;
if (device_num < 0)
return 0;
struct gomp_device_descr *devicep = resolve_device (device_num);
if (devicep == NULL)
return 0;
if (!(devicep->capabilities & GOMP_OFFLOAD_CAP_OPENMP_400)
|| devicep->capabilities & GOMP_OFFLOAD_CAP_SHARED_MEM)
return 1;
gomp_mutex_lock (&devicep->lock);
struct splay_tree_s *mem_map = &devicep->mem_map;
struct splay_tree_key_s cur_node;
cur_node.host_start = (uintptr_t) ptr;
cur_node.host_end = cur_node.host_start;
splay_tree_key n = gomp_map_0len_lookup (mem_map, &cur_node);
int ret = n != NULL;
gomp_mutex_unlock (&devicep->lock);
return ret;
}
int
omp_target_memcpy (void *dst, const void *src, size_t length,
size_t dst_offset, size_t src_offset, int dst_device_num,
int src_device_num)
{
struct gomp_device_descr *dst_devicep = NULL, *src_devicep = NULL;
bool ret;
if (dst_device_num != gomp_get_num_devices ())
{