Current File : //usr/src/linux-headers-5.15.0-125-generic/include/linux/sunrpc/xprtrdma.h
/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
/*
* Copyright (c) 2003-2007 Network Appliance, Inc. 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-type
* 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.
*
* Neither the name of the Network Appliance, Inc. nor the names of
* its contributors may be used to endorse or promote products
* derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _LINUX_SUNRPC_XPRTRDMA_H
#define _LINUX_SUNRPC_XPRTRDMA_H
/*
* Constants. Max RPC/NFS header is big enough to account for
* additional marshaling buffers passed down by Linux client.
*
* RDMA header is currently fixed max size, and is big enough for a
* fully-chunked NFS message (read chunks are the largest). Note only
* a single chunk type per message is supported currently.
*/
#define RPCRDMA_MIN_SLOT_TABLE (4U)
#define RPCRDMA_DEF_SLOT_TABLE (128U)
#define RPCRDMA_MAX_SLOT_TABLE (16384U)
#define RPCRDMA_MIN_INLINE (1024) /* min inline thresh */
#define RPCRDMA_DEF_INLINE (4096) /* default inline thresh */
#define RPCRDMA_MAX_INLINE (65536) /* max inline thresh */
/* Memory registration strategies, by number.
* This is part of a kernel / user space API. Do not remove. */
enum rpcrdma_memreg {
RPCRDMA_BOUNCEBUFFERS = 0,
RPCRDMA_REGISTER,
RPCRDMA_MEMWINDOWS,
RPCRDMA_MEMWINDOWS_ASYNC,
RPCRDMA_MTHCAFMR,
RPCRDMA_FRWR,
RPCRDMA_ALLPHYSICAL,
RPCRDMA_LAST
};
#endif /* _LINUX_SUNRPC_XPRTRDMA_H */
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