1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ 2 /* 3 * Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the BSD-type 9 * license below: 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 15 * Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 18 * Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials provided 21 * with the distribution. 22 * 23 * Neither the name of the Network Appliance, Inc. nor the names of 24 * its contributors may be used to endorse or promote products 25 * derived from this software without specific prior written 26 * permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 */ 40 41 #ifndef _LINUX_SUNRPC_XPRTRDMA_H 42 #define _LINUX_SUNRPC_XPRTRDMA_H 43 44 /* 45 * Constants. Max RPC/NFS header is big enough to account for 46 * additional marshaling buffers passed down by Linux client. 47 * 48 * RDMA header is currently fixed max size, and is big enough for a 49 * fully-chunked NFS message (read chunks are the largest). Note only 50 * a single chunk type per message is supported currently. 51 */ 52 #define RPCRDMA_MIN_SLOT_TABLE (4U) 53 #define RPCRDMA_DEF_SLOT_TABLE (128U) 54 #define RPCRDMA_MAX_SLOT_TABLE (16384U) 55 56 #define RPCRDMA_MIN_INLINE (1024) /* min inline thresh */ 57 #define RPCRDMA_DEF_INLINE (4096) /* default inline thresh */ 58 #define RPCRDMA_MAX_INLINE (65536) /* max inline thresh */ 59 60 /* Memory registration strategies, by number. 61 * This is part of a kernel / user space API. Do not remove. */ 62 enum rpcrdma_memreg { 63 RPCRDMA_BOUNCEBUFFERS = 0, 64 RPCRDMA_REGISTER, 65 RPCRDMA_MEMWINDOWS, 66 RPCRDMA_MEMWINDOWS_ASYNC, 67 RPCRDMA_MTHCAFMR, 68 RPCRDMA_FRWR, 69 RPCRDMA_ALLPHYSICAL, 70 RPCRDMA_LAST 71 }; 72 73 #endif /* _LINUX_SUNRPC_XPRTRDMA_H */ 74