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/*
* (C) Copyright 2023 UT-Battelle, LLC. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef OFI_XPMEM_H
#define OFI_XPMEM_H
#include <ofi_mr.h>
#include <ofi_util.h>
#if HAVE_XPMEM
#include <xpmem.h>
#else
/* define XPMEM specific types to allow the code to
* compile on different platforms and to allow smr_region to compile
* without xpmem available.
*/
typedef int64_t xpmem_apid_t;
typedef int64_t xpmem_segid_t;
#endif /* HAVE_XPMEM */
struct xpmem_client {
uint8_t cap;
xpmem_apid_t apid;
uintptr_t addr_max;
};
struct xpmem_pinfo {
/* XPMEM segment id for this process */
xpmem_segid_t seg_id;
/* maximum attachment address for this process. attempts to attach
* past this value may fail. */
uintptr_t address_max;
};
struct xpmem {
struct xpmem_pinfo pinfo;
/* maximum size that will be used with a single memcpy call.
* On some systems we see better peformance if we chunk the
* copy into multiple memcpy calls. */
uint64_t memcpy_chunk_size;
};
extern struct xpmem *xpmem;
int ofi_xpmem_cache_search(struct ofi_mr_cache *cache,
struct iovec *iov, uint64_t peer_id,
struct ofi_mr_entry **mr_entry,
struct xpmem_client *xpmem);
int ofi_xpmem_cache_open(struct ofi_mr_cache **cache);
void ofi_xpmem_cache_destroy(struct ofi_mr_cache *cache);
int xpmem_init(void);
int xpmem_cleanup(void);
int xpmem_copy(struct iovec *local, unsigned long local_cnt,
struct iovec *remote, unsigned long remote_cnt,
size_t total, pid_t pid, bool write, void *user_data);
int ofi_xpmem_enable(struct xpmem_pinfo *peer,
struct xpmem_client *xpmem);
void ofi_xpmem_release(struct xpmem_client *xpmem);
#endif /* OFI_XPMEM_H */
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