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