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target.c
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target.c
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/* Copyright (C) 2013-2017 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 "config.h"
#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
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 (®ister_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 ())
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);
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 void
gomp_copy_host2dev (struct gomp_device_descr *devicep,
void *d, const void *h, size_t sz)
{
gomp_device_copy (devicep, devicep->host2dev_func, "dev", d, "host", h, sz);
}
static void
gomp_copy_dev2host (struct gomp_device_descr *devicep,
void *h, const void *d, size_t sz)
{
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, splay_tree_key oldn,
splay_tree_key newn, struct target_var_desc *tgt_var,
unsigned char kind)
{
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->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))
gomp_copy_host2dev (devicep,
(void *) (oldn->tgt->tgt_start + oldn->tgt_offset
+ newn->host_start - oldn->host_start),
(void *) newn->host_start,
newn->host_end - newn->host_start);
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, uintptr_t host_ptr,
uintptr_t target_offset, uintptr_t bias)
{
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;
/* FIXME: see comment about coalescing host/dev transfers below. */
gomp_copy_host2dev (devicep,
(void *) (tgt->tgt_start + target_offset),
(void *) &cur_node.tgt_offset,
sizeof (void *));
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;
/* FIXME: see comment about coalescing host/dev transfers below. */
gomp_copy_host2dev (devicep, (void *) (tgt->tgt_start + target_offset),
(void *) &cur_node.tgt_offset, sizeof (void *));
}
static void
gomp_map_fields_existing (struct target_mem_desc *tgt, splay_tree_key n,
size_t first, size_t i, void **hostaddrs,
size_t *sizes, void *kinds)
{
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, n2, &cur_node,
&tgt->list[i], kind & typemask);
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, n2, &cur_node, &tgt->list[i],
kind & typemask);
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, n2, &cur_node, &tgt->list[i],
kind & typemask);
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);
}
static inline 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;
if (tgt->list[i].offset == ~(uintptr_t) 0)
return (uintptr_t) hostaddrs[i];
if (tgt->list[i].offset == ~(uintptr_t) 1)
return 0;
if (tgt->list[i].offset == ~(uintptr_t) 2)
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];
return tgt->tgt_start + tgt->list[i].offset;
}
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)
{
size_t i, tgt_align, tgt_size, not_found_cnt = 0;
bool has_firstprivate = 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;
if (mapnum == 0)
{
tgt->tgt_start = 0;
tgt->tgt_end = 0;
return tgt;
}
tgt_align = sizeof (void *);
tgt_size = 0;
if (pragma_kind == GOMP_MAP_VARS_TARGET)
{
size_t align = 4 * sizeof (void *);
tgt_align = align;
tgt_size = mapnum * sizeof (void *);
}
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 = ~(uintptr_t) 0;
continue;
}
else if ((kind & typemask) == GOMP_MAP_USE_DEVICE_PTR)
{
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)
{
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("use_device_ptr pointer wasn't mapped");
}
cur_node.host_start -= n->host_start;
hostaddrs[i]
= (void *) (n->tgt->tgt_start + n->tgt_offset
+ cur_node.host_start);
tgt->list[i].key = NULL;
tgt->list[i].offset = ~(uintptr_t) 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 = ~(uintptr_t) 2;
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]
- (uintptr_t) hostaddrs[i];
tgt_size = (tgt_size + align - 1) & ~(align - 1);
tgt_size += cur_node.host_end - (uintptr_t) hostaddrs[i];
not_found_cnt += last - i;
for (i = first; i <= last; i++)
tgt->list[i].key = NULL;
i--;
continue;
}
for (i = first; i <= last; i++)
gomp_map_fields_existing (tgt, n, first, i, hostaddrs,
sizes, kinds);
i--;
continue;
}
else if ((kind & typemask) == GOMP_MAP_ALWAYS_POINTER)
{
tgt->list[i].key = NULL;
tgt->list[i].offset = ~(uintptr_t) 1;
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);
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 = ~(uintptr_t) 1;
continue;
}
}
else
n = splay_tree_lookup (mem_map, &cur_node);
if (n && n->refcount != REFCOUNT_LINK)
gomp_map_vars_existing (devicep, n, &cur_node, &tgt->list[i],
kind & typemask);
else
{
tgt->list[i].key = NULL;
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);
tgt_size += cur_node.host_end - cur_node.host_start;
if ((kind & typemask) == GOMP_MAP_TO_PSET)
{
size_t j;
for (j = i + 1; j < mapnum; j++)
if (!GOMP_MAP_POINTER_P (get_kind (short_mapkind, kinds, j)
& typemask))
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;
}
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)
{
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 = ~(size_t) 0;
uintptr_t field_tgt_base = 0;
for (i = 0; i < mapnum; i++)
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,
(void *) (tgt->tgt_start + tgt_size),
(void *) hostaddrs[i], len);
tgt_size += len;
continue;
case GOMP_MAP_FIRSTPRIVATE_INT:
case GOMP_MAP_USE_DEVICE_PTR:
case GOMP_MAP_ZERO_LEN_ARRAY_SECTION:
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, n, first, i, hostaddrs,
sizes, kinds);
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,
(void *) (n->tgt->tgt_start
+ n->tgt_offset
+ cur_node.host_start
- n->host_start),
(void *) &cur_node.tgt_offset,
sizeof (void *));
cur_node.tgt_offset = n->tgt->tgt_start + n->tgt_offset
+ cur_node.host_start - n->host_start;
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, n, k, &tgt->list[i],
kind & typemask);
else
{
k->link_key = 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->link_key = n;
}
size_t align = (size_t) 1 << (kind >> rshift);
tgt->list[i].key = k;
k->tgt = tgt;
if (field_tgt_clear != ~(size_t) 0)
{
k->tgt_offset = k->host_start - field_tgt_base
+ field_tgt_offset;
if (i == field_tgt_clear)
field_tgt_clear = ~(size_t) 0;
}
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].offset = 0;
tgt->list[i].length = k->host_end - k->host_start;
k->refcount = 1;
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:
/* FIXME: Perhaps add some smarts, like if copying
several adjacent fields from host to target, use some
host buffer to avoid sending each var individually. */
gomp_copy_host2dev (devicep,
(void *) (tgt->tgt_start
+ k->tgt_offset),
(void *) k->host_start,
k->host_end - k->host_start);
break;
case GOMP_MAP_POINTER:
gomp_map_pointer (tgt, (uintptr_t) *(void **) k->host_start,
k->tgt_offset, sizes[i]);
break;
case GOMP_MAP_TO_PSET:
/* FIXME: see above FIXME comment. */
gomp_copy_host2dev (devicep,
(void *) (tgt->tgt_start
+ k->tgt_offset),
(void *) k->host_start,
k->host_end - k->host_start);
for (j = i + 1; j < mapnum; j++)
if (!GOMP_MAP_POINTER_P (get_kind (short_mapkind, kinds,
j)
& typemask))
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;
if (k->refcount != REFCOUNT_INFINITY)
k->refcount++;
gomp_map_pointer (tgt,
(uintptr_t) *(void **) hostaddrs[j],
k->tgt_offset
+ ((uintptr_t) hostaddrs[j]
- k->host_start),
sizes[j]);
i++;
}
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,
(void *) (tgt->tgt_start
+ k->tgt_offset),
(void *) k->host_start,
sizeof (void *));
break;
default:
gomp_mutex_unlock (&devicep->lock);
gomp_fatal ("%s: unhandled kind 0x%.2x", __FUNCTION__,
kind);
}
if (k->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);
devicep->host2dev_func (devicep->target_id,
(void *) n->tgt_offset,
&tgt_addr, sizeof (void *));
}
array++;
}
}
}
if (pragma_kind == GOMP_MAP_VARS_TARGET)
{
for (i = 0; i < mapnum; i++)
{
cur_node.tgt_offset = gomp_map_val (tgt, hostaddrs, i);
/* FIXME: see above FIXME comment. */
gomp_copy_host2dev (devicep,
(void *) (tgt->tgt_start + i * sizeof (void *)),
(void *) &cur_node.tgt_offset, sizeof (void *));
}
}
/* 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;
}
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);
}
/* 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. */
attribute_hidden void
gomp_unmap_vars (struct target_mem_desc *tgt, bool do_copyfrom)
{
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;
for (i = 0; i < tgt->list_count; i++)
{
splay_tree_key k = tgt->list[i].key;
if (k == NULL)
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,
(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)
{
splay_tree_remove (&devicep->mem_map, k);
if (k->link_key)
splay_tree_insert (&devicep->mem_map,
(splay_tree_node) k->link_key);
if (k->tgt->refcount > 1)
k->tgt->refcount--;
else
gomp_unmap_tgt (k->tgt);
}
}
if (tgt->refcount > 1)
tgt->refcount--;
else
gomp_unmap_tgt (tgt);
gomp_mutex_unlock (&devicep->lock);
}
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, devaddr, hostaddr, size);
if (GOMP_MAP_COPY_FROM_P (kind & typemask))
gomp_copy_dev2host (devicep, 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;