1/* 2 * Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the BSD-type 8 * license below: 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 17 * Redistributions in binary form must reproduce the above 18 * copyright notice, this list of conditions and the following 19 * disclaimer in the documentation and/or other materials provided 20 * with the distribution. 21 * 22 * Neither the name of the Network Appliance, Inc. nor the names of 23 * its contributors may be used to endorse or promote products 24 * derived from this software without specific prior written 25 * permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 31 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 32 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 33 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 34 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 35 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 36 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 37 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40#ifndef _LINUX_SUNRPC_XPRTRDMA_H 41#define _LINUX_SUNRPC_XPRTRDMA_H 42 43/* 44 * rpcbind (v3+) RDMA netid. 45 */ 46#define RPCBIND_NETID_RDMA "rdma" 47 48/* 49 * Constants. Max RPC/NFS header is big enough to account for 50 * additional marshaling buffers passed down by Linux client. 51 * 52 * RDMA header is currently fixed max size, and is big enough for a 53 * fully-chunked NFS message (read chunks are the largest). Note only 54 * a single chunk type per message is supported currently. 55 */ 56#define RPCRDMA_MIN_SLOT_TABLE (2U) 57#define RPCRDMA_DEF_SLOT_TABLE (32U) 58#define RPCRDMA_MAX_SLOT_TABLE (256U) 59 60#define RPCRDMA_DEF_INLINE (1024) /* default inline max */ 61 62#define RPCRDMA_INLINE_PAD_THRESH (512)/* payload threshold to pad (bytes) */ 63 64/* memory registration strategies */ 65#define RPCRDMA_PERSISTENT_REGISTRATION (1) 66 67enum rpcrdma_memreg { 68 RPCRDMA_BOUNCEBUFFERS = 0, 69 RPCRDMA_REGISTER, 70 RPCRDMA_MEMWINDOWS, 71 RPCRDMA_MEMWINDOWS_ASYNC, 72 RPCRDMA_MTHCAFMR, 73 RPCRDMA_FRMR, 74 RPCRDMA_ALLPHYSICAL, 75 RPCRDMA_LAST 76}; 77 78#endif /* _LINUX_SUNRPC_XPRTRDMA_H */ 79