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c3a57ed7 | 1 | /* |
62b56a67 | 2 | * Copyright (c) 2015-2017 Oracle. All rights reserved. |
c3a57ed7 TT |
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_RPC_RDMA_H | |
42 | #define _LINUX_SUNRPC_RPC_RDMA_H | |
43 | ||
a600ffcb | 44 | #include <linux/types.h> |
ff06bd19 | 45 | #include <linux/bitops.h> |
a600ffcb | 46 | |
284f4902 CL |
47 | #define RPCRDMA_VERSION 1 |
48 | #define rpcrdma_version cpu_to_be32(RPCRDMA_VERSION) | |
49 | ||
87cfb9a0 CL |
50 | enum { |
51 | RPCRDMA_V1_DEF_INLINE_SIZE = 1024, | |
52 | }; | |
53 | ||
cbaf5803 CL |
54 | /* |
55 | * XDR sizes, in quads | |
56 | */ | |
57 | enum { | |
58 | rpcrdma_fixed_maxsz = 4, | |
59 | rpcrdma_segment_maxsz = 4, | |
60 | rpcrdma_readchunk_maxsz = 2 + rpcrdma_segment_maxsz, | |
61 | }; | |
62 | ||
f2846481 CL |
63 | /* |
64 | * Smallest RPC/RDMA header: rm_xid through rm_type, then rm_nochunks | |
65 | */ | |
66 | #define RPCRDMA_HDRLEN_MIN (sizeof(__be32) * 7) | |
d8647f2d | 67 | #define RPCRDMA_HDRLEN_ERR (sizeof(__be32) * 5) |
c3a57ed7 TT |
68 | |
69 | enum rpcrdma_errcode { | |
70 | ERR_VERS = 1, | |
71 | ERR_CHUNK = 2 | |
72 | }; | |
73 | ||
c3a57ed7 TT |
74 | enum rpcrdma_proc { |
75 | RDMA_MSG = 0, /* An RPC call or reply msg */ | |
76 | RDMA_NOMSG = 1, /* An RPC call or reply msg - separate body */ | |
77 | RDMA_MSGP = 2, /* An RPC call or reply msg with padding */ | |
78 | RDMA_DONE = 3, /* Client signals reply completion */ | |
79 | RDMA_ERROR = 4 /* An RPC RDMA encoding error */ | |
80 | }; | |
81 | ||
284f4902 CL |
82 | #define rdma_msg cpu_to_be32(RDMA_MSG) |
83 | #define rdma_nomsg cpu_to_be32(RDMA_NOMSG) | |
84 | #define rdma_msgp cpu_to_be32(RDMA_MSGP) | |
85 | #define rdma_done cpu_to_be32(RDMA_DONE) | |
86 | #define rdma_error cpu_to_be32(RDMA_ERROR) | |
87 | ||
6b19cc5c CL |
88 | #define err_vers cpu_to_be32(ERR_VERS) |
89 | #define err_chunk cpu_to_be32(ERR_CHUNK) | |
90 | ||
ff06bd19 CL |
91 | /* |
92 | * Private extension to RPC-over-RDMA Version One. | |
93 | * Message passed during RDMA-CM connection set-up. | |
94 | * | |
95 | * Add new fields at the end, and don't permute existing | |
96 | * fields. | |
97 | */ | |
98 | struct rpcrdma_connect_private { | |
99 | __be32 cp_magic; | |
100 | u8 cp_version; | |
101 | u8 cp_flags; | |
102 | u8 cp_send_size; | |
103 | u8 cp_recv_size; | |
104 | } __packed; | |
105 | ||
106 | #define rpcrdma_cmp_magic __cpu_to_be32(0xf6ab0e18) | |
107 | ||
108 | enum { | |
109 | RPCRDMA_CMP_VERSION = 1, | |
110 | RPCRDMA_CMP_F_SND_W_INV_OK = BIT(0), | |
111 | }; | |
112 | ||
113 | static inline u8 | |
114 | rpcrdma_encode_buffer_size(unsigned int size) | |
115 | { | |
116 | return (size >> 10) - 1; | |
117 | } | |
118 | ||
119 | static inline unsigned int | |
120 | rpcrdma_decode_buffer_size(u8 val) | |
121 | { | |
122 | return ((unsigned int)val + 1) << 10; | |
123 | } | |
124 | ||
c3a57ed7 | 125 | #endif /* _LINUX_SUNRPC_RPC_RDMA_H */ |