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/*
* Copyright (c) 2011-2013 Sandia National Laboratories. All rights reserved.
* Copyright (c) 2014 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#include "ompi/mca/osc/base/base.h"
#include "ompi/mca/osc/base/osc_base_obj_convert.h"
#include "ompi/mca/osc/osc.h"
#include "osc_portals4.h"
enum locktype_t {
lock_nocheck,
lock_exclusive,
lock_shared
};
struct ompi_osc_portals4_outstanding_lock_t {
opal_list_item_t super;
int target;
enum locktype_t lock_type;
};
typedef struct ompi_osc_portals4_outstanding_lock_t ompi_osc_portals4_outstanding_lock_t;
OBJ_CLASS_INSTANCE(ompi_osc_portals4_outstanding_lock_t, opal_list_item_t,
NULL, NULL);
static inline int
lk_cas64(ompi_osc_portals4_module_t *module,
int target,
int64_t write_val,
int64_t comp_val,
int64_t *result_val)
{
int ret;
size_t offset = offsetof(ompi_osc_portals4_node_state_t, lock);
(void)opal_atomic_add_fetch_64(&module->opcount, 1);
ret = PtlSwap(module->md_h,
(ptl_size_t) result_val,
module->md_h,
(ptl_size_t) &write_val,
sizeof(int64_t),
ompi_osc_portals4_get_peer(module, target),
module->pt_idx,
module->match_bits | OSC_PORTALS4_MB_CONTROL,
offset,
NULL,
0,
&comp_val,
PTL_CSWAP,
PTL_INT64_T);
if (OMPI_SUCCESS != ret) {
return ret;
}
ret = ompi_osc_portals4_complete_all(module);
return ret;
}
static inline int
lk_write64(ompi_osc_portals4_module_t *module,
int target,
int64_t write_val)
{
int ret;
size_t offset = offsetof(ompi_osc_portals4_node_state_t, lock);
(void)opal_atomic_add_fetch_64(&module->opcount, 1);
ret = PtlPut(module->md_h,
(ptl_size_t) &write_val,
sizeof(int64_t),
PTL_ACK_REQ,
ompi_osc_portals4_get_peer(module, target),
module->pt_idx,
module->match_bits | OSC_PORTALS4_MB_CONTROL,
offset,
NULL,
0);
if (OMPI_SUCCESS != ret) {
return ret;
}
ret = ompi_osc_portals4_complete_all(module);
return ret;
}
static inline int
lk_add64(ompi_osc_portals4_module_t *module,
int target,
int64_t write_val,
int64_t *result_val)
{
int ret;
size_t offset = offsetof(ompi_osc_portals4_node_state_t, lock);
(void)opal_atomic_add_fetch_64(&module->opcount, 1);
ret = PtlFetchAtomic(module->md_h,
(ptl_size_t) result_val,
module->md_h,
(ptl_size_t) &write_val,
sizeof(int64_t),
ompi_osc_portals4_get_peer(module, target),
module->pt_idx,
module->match_bits | OSC_PORTALS4_MB_CONTROL,
offset,
NULL,
0,
PTL_SUM,
PTL_INT64_T);
if (OMPI_SUCCESS != ret) {
return ret;
}
ret = ompi_osc_portals4_complete_all(module);
return ret;
}
static inline int
start_exclusive(ompi_osc_portals4_module_t *module,
int target)
{
int64_t result;
int ret;
while (true) {
ret = lk_cas64(module, target, LOCK_EXCLUSIVE, 0, &result);
if (OMPI_SUCCESS != ret) return ret;
if (LOCK_ILLEGAL == (LOCK_ILLEGAL & result)) return OMPI_ERR_RMA_SYNC;
if (0 == result) break;
}
return OMPI_SUCCESS;
}
static inline int
end_exclusive(ompi_osc_portals4_module_t *module,
int target)
{
int ret;
ret = lk_write64(module, target, LOCK_UNLOCKED);
return ret;
}
static inline int
start_shared(ompi_osc_portals4_module_t *module,
int target)
{
int64_t result;
int ret;
while (true) {
ret = lk_add64(module, target, 1, &result);
if (OMPI_SUCCESS != ret) return ret;
if (result > (int64_t)LOCK_EXCLUSIVE) {
if (LOCK_ILLEGAL == (LOCK_ILLEGAL & result)) return OMPI_ERR_RMA_SYNC;
ret = lk_add64(module, target, -1, &result);
if (OMPI_SUCCESS != ret) return ret;
} else {
break;
}
}
return OMPI_SUCCESS;
}
static inline int
end_shared(ompi_osc_portals4_module_t *module,
int target)
{
int64_t result;
int ret;
ret = lk_add64(module, target, -1, &result);
return ret;
}
int
ompi_osc_portals4_lock(int lock_type,
int target,
int mpi_assert,
struct ompi_win_t *win)
{
ompi_osc_portals4_module_t *module =
(ompi_osc_portals4_module_t*) win->w_osc_module;
ompi_osc_portals4_outstanding_lock_t* lock;
int ret;
module->passive_target_access_epoch = true;
lock = OBJ_NEW(ompi_osc_portals4_outstanding_lock_t);
lock->target = target;
if (0 == (mpi_assert & MPI_MODE_NOCHECK)) {
if (MPI_LOCK_EXCLUSIVE == lock_type) {
lock->lock_type = lock_exclusive;
ret = start_exclusive(module, target);
} else {
lock->lock_type = lock_shared;
ret = start_shared(module, target);
}
} else {
lock->lock_type = lock_nocheck;
ret = OMPI_SUCCESS;
}
if (OMPI_SUCCESS == ret) {
opal_list_append(&module->outstanding_locks, &lock->super);
} else {
OBJ_RELEASE(lock);
}
return ret;
}
int
ompi_osc_portals4_unlock(int target,
struct ompi_win_t *win)
{
ompi_osc_portals4_module_t *module =
(ompi_osc_portals4_module_t*) win->w_osc_module;
ompi_osc_portals4_outstanding_lock_t *lock = NULL, *item;
int ret;
OPAL_LIST_FOREACH(item, &module->outstanding_locks,
ompi_osc_portals4_outstanding_lock_t) {
if (item->target == target) {
lock = item;
break;
}
}
if (NULL != item) {
opal_list_remove_item(&module->outstanding_locks, &lock->super);
} else {
return OMPI_ERR_RMA_SYNC;
}
ret = ompi_osc_portals4_complete_all(module);
if (ret != OMPI_SUCCESS) return ret;
if (lock->lock_type == lock_exclusive) {
ret = end_exclusive(module, target);
} else if (lock->lock_type == lock_shared) {
ret = end_shared(module, target);
} else {
ret = OMPI_SUCCESS;
}
module->passive_target_access_epoch = false;
OBJ_RELEASE(lock);
return ret;
}
int
ompi_osc_portals4_lock_all(int mpi_assert,
struct ompi_win_t *win)
{
ompi_osc_portals4_module_t *module =
(ompi_osc_portals4_module_t*) win->w_osc_module;
ompi_osc_portals4_outstanding_lock_t* lock;
int ret = OMPI_SUCCESS;
module->passive_target_access_epoch = true;
lock = OBJ_NEW(ompi_osc_portals4_outstanding_lock_t);
lock->target = -1;
if (0 == (mpi_assert & MPI_MODE_NOCHECK)) {
int i, comm_size;
lock->lock_type = lock_shared;
comm_size = ompi_comm_size(module->comm);
for (i = 0 ; i < comm_size ; ++i) {
ret |= start_shared(module, i);
}
} else {
lock->lock_type = lock_nocheck;
ret = OMPI_SUCCESS;
}
if (OMPI_SUCCESS == ret) {
opal_list_append(&module->outstanding_locks, &lock->super);
} else {
OBJ_RELEASE(lock);
}
return ret;
}
int
ompi_osc_portals4_unlock_all(struct ompi_win_t *win)
{
ompi_osc_portals4_module_t *module =
(ompi_osc_portals4_module_t*) win->w_osc_module;
ompi_osc_portals4_outstanding_lock_t *lock = NULL, *item;
int ret;
OPAL_LIST_FOREACH(item, &module->outstanding_locks,
ompi_osc_portals4_outstanding_lock_t) {
if (item->target == -1) {
lock = item;
break;
}
}
if (NULL != item) {
opal_list_remove_item(&module->outstanding_locks, &lock->super);
} else {
return OMPI_ERR_RMA_SYNC;
}
ret = ompi_osc_portals4_complete_all(module);
if (ret != OMPI_SUCCESS) return ret;
if (lock->lock_type == lock_shared) {
int i, comm_size;
comm_size = ompi_comm_size(module->comm);
for (i = 0 ; i < comm_size ; ++i) {
ret |= end_shared(module, i);
}
}
module->passive_target_access_epoch = false;
OBJ_RELEASE(lock);
return OMPI_SUCCESS;
}
int
ompi_osc_portals4_sync(struct ompi_win_t *win)
{
/* Not sure this is strictly necessary, but why not? */
opal_atomic_mb();
PtlAtomicSync();
return OMPI_SUCCESS;
}
int
ompi_osc_portals4_flush(int target,
struct ompi_win_t *win)
{
ompi_osc_portals4_module_t *module =
(ompi_osc_portals4_module_t*) win->w_osc_module;
/* flush is only allowed from within a passive target epoch */
if (!module->passive_target_access_epoch) {
return OMPI_ERR_RMA_SYNC;
}
return ompi_osc_portals4_complete_all(module);
}
int
ompi_osc_portals4_flush_all(struct ompi_win_t *win)
{
ompi_osc_portals4_module_t *module =
(ompi_osc_portals4_module_t*) win->w_osc_module;
/* flush is only allowed from within a passive target epoch */
if (!module->passive_target_access_epoch) {
return OMPI_ERR_RMA_SYNC;
}
return ompi_osc_portals4_complete_all(module);
}
int
ompi_osc_portals4_flush_local(int target,
struct ompi_win_t *win)
{
ompi_osc_portals4_module_t *module =
(ompi_osc_portals4_module_t*) win->w_osc_module;
/* flush is only allowed from within a passive target epoch */
if (!module->passive_target_access_epoch) {
return OMPI_ERR_RMA_SYNC;
}
return ompi_osc_portals4_complete_all(module);
}
int
ompi_osc_portals4_flush_local_all(struct ompi_win_t *win)
{
ompi_osc_portals4_module_t *module =
(ompi_osc_portals4_module_t*) win->w_osc_module;
/* flush is only allowed from within a passive target epoch */
if (!module->passive_target_access_epoch) {
return OMPI_ERR_RMA_SYNC;
}
return ompi_osc_portals4_complete_all(module);
}
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