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1 | /* |
2 | * Copyright(c) 2016 Intel Corporation. | |
3 | * | |
4 | * This file is provided under a dual BSD/GPLv2 license. When using or | |
5 | * redistributing this file, you may do so under either license. | |
6 | * | |
7 | * GPL LICENSE SUMMARY | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of version 2 of the GNU General Public License as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * BSD LICENSE | |
19 | * | |
20 | * Redistribution and use in source and binary forms, with or without | |
21 | * modification, are permitted provided that the following conditions | |
22 | * are met: | |
23 | * | |
24 | * - Redistributions of source code must retain the above copyright | |
25 | * notice, this list of conditions and the following disclaimer. | |
26 | * - Redistributions in binary form must reproduce the above copyright | |
27 | * notice, this list of conditions and the following disclaimer in | |
28 | * the documentation and/or other materials provided with the | |
29 | * distribution. | |
30 | * - Neither the name of Intel Corporation nor the names of its | |
31 | * contributors may be used to endorse or promote products derived | |
32 | * from this software without specific prior written permission. | |
33 | * | |
34 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
35 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
36 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
37 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
38 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
39 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
40 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
41 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
42 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
43 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
44 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
45 | * | |
46 | */ | |
47 | ||
48 | #ifndef IB_HDRS_H | |
49 | #define IB_HDRS_H | |
50 | ||
51 | #include <linux/types.h> | |
52 | #include <asm/unaligned.h> | |
53 | #include <rdma/ib_verbs.h> | |
54 | ||
55 | #define IB_SEQ_NAK (3 << 29) | |
56 | ||
57 | /* AETH NAK opcode values */ | |
58 | #define IB_RNR_NAK 0x20 | |
59 | #define IB_NAK_PSN_ERROR 0x60 | |
60 | #define IB_NAK_INVALID_REQUEST 0x61 | |
61 | #define IB_NAK_REMOTE_ACCESS_ERROR 0x62 | |
62 | #define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63 | |
63 | #define IB_NAK_INVALID_RD_REQUEST 0x64 | |
64 | ||
65 | #define IB_BTH_REQ_ACK BIT(31) | |
66 | #define IB_BTH_SOLICITED BIT(23) | |
67 | #define IB_BTH_MIG_REQ BIT(22) | |
68 | ||
69 | #define IB_GRH_VERSION 6 | |
70 | #define IB_GRH_VERSION_MASK 0xF | |
71 | #define IB_GRH_VERSION_SHIFT 28 | |
72 | #define IB_GRH_TCLASS_MASK 0xFF | |
73 | #define IB_GRH_TCLASS_SHIFT 20 | |
74 | #define IB_GRH_FLOW_MASK 0xFFFFF | |
75 | #define IB_GRH_FLOW_SHIFT 0 | |
76 | #define IB_GRH_NEXT_HDR 0x1B | |
77 | ||
78 | struct ib_reth { | |
79 | __be64 vaddr; /* potentially unaligned */ | |
80 | __be32 rkey; | |
81 | __be32 length; | |
82 | } __packed; | |
83 | ||
84 | struct ib_atomic_eth { | |
85 | __be64 vaddr; /* potentially unaligned */ | |
86 | __be32 rkey; | |
87 | __be64 swap_data; /* potentially unaligned */ | |
88 | __be64 compare_data; /* potentially unaligned */ | |
89 | } __packed; | |
90 | ||
91 | union ib_ehdrs { | |
92 | struct { | |
93 | __be32 deth[2]; | |
94 | __be32 imm_data; | |
95 | } ud; | |
96 | struct { | |
97 | struct ib_reth reth; | |
98 | __be32 imm_data; | |
99 | } rc; | |
100 | struct { | |
101 | __be32 aeth; | |
102 | __be64 atomic_ack_eth; /* potentially unaligned */ | |
103 | } __packed at; | |
104 | __be32 imm_data; | |
105 | __be32 aeth; | |
106 | __be32 ieth; | |
107 | struct ib_atomic_eth atomic_eth; | |
108 | } __packed; | |
109 | ||
110 | struct ib_other_headers { | |
111 | __be32 bth[3]; | |
112 | union ib_ehdrs u; | |
113 | } __packed; | |
114 | ||
115 | struct ib_header { | |
116 | __be16 lrh[4]; | |
117 | union { | |
118 | struct { | |
119 | struct ib_grh grh; | |
120 | struct ib_other_headers oth; | |
121 | } l; | |
122 | struct ib_other_headers oth; | |
123 | } u; | |
124 | } __packed; | |
125 | ||
126 | /* accessors for unaligned __be64 items */ | |
127 | ||
128 | static inline u64 ib_u64_get(__be64 *p) | |
129 | { | |
130 | return get_unaligned_be64(p); | |
131 | } | |
132 | ||
133 | static inline void ib_u64_put(u64 val, __be64 *p) | |
134 | { | |
135 | put_unaligned_be64(val, p); | |
136 | } | |
137 | ||
138 | static inline u64 get_ib_reth_vaddr(struct ib_reth *reth) | |
139 | { | |
140 | return ib_u64_get(&reth->vaddr); | |
141 | } | |
142 | ||
143 | static inline void put_ib_reth_vaddr(u64 val, struct ib_reth *reth) | |
144 | { | |
145 | ib_u64_put(val, &reth->vaddr); | |
146 | } | |
147 | ||
148 | static inline u64 get_ib_ateth_vaddr(struct ib_atomic_eth *ateth) | |
149 | { | |
150 | return ib_u64_get(&ateth->vaddr); | |
151 | } | |
152 | ||
153 | static inline void put_ib_ateth_vaddr(u64 val, struct ib_atomic_eth *ateth) | |
154 | { | |
155 | ib_u64_put(val, &ateth->vaddr); | |
156 | } | |
157 | ||
158 | static inline u64 get_ib_ateth_swap(struct ib_atomic_eth *ateth) | |
159 | { | |
160 | return ib_u64_get(&ateth->swap_data); | |
161 | } | |
162 | ||
163 | static inline void put_ib_ateth_swap(u64 val, struct ib_atomic_eth *ateth) | |
164 | { | |
165 | ib_u64_put(val, &ateth->swap_data); | |
166 | } | |
167 | ||
168 | static inline u64 get_ib_ateth_compare(struct ib_atomic_eth *ateth) | |
169 | { | |
170 | return ib_u64_get(&ateth->compare_data); | |
171 | } | |
172 | ||
173 | static inline void put_ib_ateth_compare(u64 val, struct ib_atomic_eth *ateth) | |
174 | { | |
175 | ib_u64_put(val, &ateth->compare_data); | |
176 | } | |
177 | ||
178 | #endif /* IB_HDRS_H */ |