projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| c3a57ed7 TT |
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_RPC_RDMA_H | |
| 41 | #define _LINUX_SUNRPC_RPC_RDMA_H | |
| 42 | ||
| 43 | struct rpcrdma_segment { | |
| 44 | uint32_t rs_handle; /* Registered memory handle */ | |
| 45 | uint32_t rs_length; /* Length of the chunk in bytes */ | |
| 46 | uint64_t rs_offset; /* Chunk virtual address or offset */ | |
| 47 | }; | |
| 48 | ||
| 49 | /* | |
| 50 | * read chunk(s), encoded as a linked list. | |
| 51 | */ | |
| 52 | struct rpcrdma_read_chunk { | |
| 53 | uint32_t rc_discrim; /* 1 indicates presence */ | |
| 54 | uint32_t rc_position; /* Position in XDR stream */ | |
| 55 | struct rpcrdma_segment rc_target; | |
| 56 | }; | |
| 57 | ||
| 58 | /* | |
| 59 | * write chunk, and reply chunk. | |
| 60 | */ | |
| 61 | struct rpcrdma_write_chunk { | |
| 62 | struct rpcrdma_segment wc_target; | |
| 63 | }; | |
| 64 | ||
| 65 | /* | |
| 66 | * write chunk(s), encoded as a counted array. | |
| 67 | */ | |
| 68 | struct rpcrdma_write_array { | |
| 69 | uint32_t wc_discrim; /* 1 indicates presence */ | |
| 70 | uint32_t wc_nchunks; /* Array count */ | |
| 71 | struct rpcrdma_write_chunk wc_array[0]; | |
| 72 | }; | |
| 73 | ||
| 74 | struct rpcrdma_msg { | |
| 75 | uint32_t rm_xid; /* Mirrors the RPC header xid */ | |
| 76 | uint32_t rm_vers; /* Version of this protocol */ | |
| 77 | uint32_t rm_credit; /* Buffers requested/granted */ | |
| 78 | uint32_t rm_type; /* Type of message (enum rpcrdma_proc) */ | |
| 79 | union { | |
| 80 | ||
| 81 | struct { /* no chunks */ | |
| 82 | uint32_t rm_empty[3]; /* 3 empty chunk lists */ | |
| 83 | } rm_nochunks; | |
| 84 | ||
| 85 | struct { /* no chunks and padded */ | |
| 86 | uint32_t rm_align; /* Padding alignment */ | |
| 87 | uint32_t rm_thresh; /* Padding threshold */ | |
| 88 | uint32_t rm_pempty[3]; /* 3 empty chunk lists */ | |
| 89 | } rm_padded; | |
| 90 | ||
| 91 | uint32_t rm_chunks[0]; /* read, write and reply chunks */ | |
| 92 | ||
| 93 | } rm_body; | |
| 94 | }; | |
| 95 | ||
| 96 | #define RPCRDMA_HDRLEN_MIN 28 | |
| 97 | ||
| 98 | enum rpcrdma_errcode { | |
| 99 | ERR_VERS = 1, | |
| 100 | ERR_CHUNK = 2 | |
| 101 | }; | |
| 102 | ||
| 103 | struct rpcrdma_err_vers { | |
| 104 | uint32_t rdma_vers_low; /* Version range supported by peer */ | |
| 105 | uint32_t rdma_vers_high; | |
| 106 | }; | |
| 107 | ||
| 108 | enum rpcrdma_proc { | |
| 109 | RDMA_MSG = 0, /* An RPC call or reply msg */ | |
| 110 | RDMA_NOMSG = 1, /* An RPC call or reply msg - separate body */ | |
| 111 | RDMA_MSGP = 2, /* An RPC call or reply msg with padding */ | |
| 112 | RDMA_DONE = 3, /* Client signals reply completion */ | |
| 113 | RDMA_ERROR = 4 /* An RPC RDMA encoding error */ | |
| 114 | }; | |
| 115 | ||
| 116 | #endif /* _LINUX_SUNRPC_RPC_RDMA_H */ |