| \"Talpey, Thomas\ | c3a57ed | 2007-09-10 13:49:15 -0400 | [diff] [blame] | 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 | * RPC transport identifier for RDMA |
| 45 | */ |
| 46 | #define XPRT_TRANSPORT_RDMA 256 |
| 47 | |
| 48 | /* |
| 49 | * rpcbind (v3+) RDMA netid. |
| 50 | */ |
| 51 | #define RPCBIND_NETID_RDMA "rdma" |
| 52 | |
| 53 | /* |
| 54 | * Constants. Max RPC/NFS header is big enough to account for |
| 55 | * additional marshaling buffers passed down by Linux client. |
| 56 | * |
| 57 | * RDMA header is currently fixed max size, and is big enough for a |
| 58 | * fully-chunked NFS message (read chunks are the largest). Note only |
| 59 | * a single chunk type per message is supported currently. |
| 60 | */ |
| 61 | #define RPCRDMA_MIN_SLOT_TABLE (2U) |
| 62 | #define RPCRDMA_DEF_SLOT_TABLE (32U) |
| 63 | #define RPCRDMA_MAX_SLOT_TABLE (256U) |
| 64 | |
| 65 | #define RPCRDMA_DEF_INLINE (1024) /* default inline max */ |
| 66 | |
| 67 | #define RPCRDMA_INLINE_PAD_THRESH (512)/* payload threshold to pad (bytes) */ |
| 68 | |
| 69 | #define RDMA_RESOLVE_TIMEOUT (5*HZ) /* TBD 5 seconds */ |
| 70 | #define RDMA_CONNECT_RETRY_MAX (2) /* retries if no listener backlog */ |
| 71 | |
| 72 | /* memory registration strategies */ |
| 73 | #define RPCRDMA_PERSISTENT_REGISTRATION (1) |
| 74 | |
| 75 | enum rpcrdma_memreg { |
| 76 | RPCRDMA_BOUNCEBUFFERS = 0, |
| 77 | RPCRDMA_REGISTER, |
| 78 | RPCRDMA_MEMWINDOWS, |
| 79 | RPCRDMA_MEMWINDOWS_ASYNC, |
| 80 | RPCRDMA_MTHCAFMR, |
| 81 | RPCRDMA_ALLPHYSICAL, |
| 82 | RPCRDMA_LAST |
| 83 | }; |
| 84 | |
| 85 | #endif /* _LINUX_SUNRPC_XPRTRDMA_H */ |