1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
3 *
4 * Copyright(c) 2016 Intel Corporation.
5 *
6 * This file is provided under a dual BSD/GPLv2 license. When using or
7 * redistributing this file, you may do so under either license.
8 *
9 * GPL LICENSE SUMMARY
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * BSD LICENSE
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 *
26 * - Redistributions of source code must retain the above copyright
27 * notice, this list of conditions and the following disclaimer.
28 * - Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in
30 * the documentation and/or other materials provided with the
31 * distribution.
32 * - Neither the name of Intel Corporation nor the names of its
33 * contributors may be used to endorse or promote products derived
34 * from this software without specific prior written permission.
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
37 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
38 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
39 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
40 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
42 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
43 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
44 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
45 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
46 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
47 */
48
49 #ifndef IB_HDRS_H
50 #define IB_HDRS_H
51
52 #include <linux/types.h>
53 #include <asm/unaligned.h>
54 #include <rdma/ib_verbs.h>
55
56 #define IB_SEQ_NAK (3 << 29)
57
58 /* AETH NAK opcode values */
59 #define IB_RNR_NAK 0x20
60 #define IB_NAK_PSN_ERROR 0x60
61 #define IB_NAK_INVALID_REQUEST 0x61
62 #define IB_NAK_REMOTE_ACCESS_ERROR 0x62
63 #define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63
64 #define IB_NAK_INVALID_RD_REQUEST 0x64
65
66 #define IB_BTH_REQ_ACK BIT(31)
67 #define IB_BTH_SOLICITED BIT(23)
68 #define IB_BTH_MIG_REQ BIT(22)
69
70 #define IB_GRH_VERSION 6
71 #define IB_GRH_VERSION_MASK 0xF
72 #define IB_GRH_VERSION_SHIFT 28
73 #define IB_GRH_TCLASS_MASK 0xFF
74 #define IB_GRH_TCLASS_SHIFT 20
75 #define IB_GRH_FLOW_MASK 0xFFFFF
76 #define IB_GRH_FLOW_SHIFT 0
77 #define IB_GRH_NEXT_HDR 0x1B
78
79 struct ib_reth {
80 __be64 vaddr; /* potentially unaligned */
81 __be32 rkey;
82 __be32 length;
83 } __packed;
84
85 struct ib_atomic_eth {
86 __be64 vaddr; /* potentially unaligned */
87 __be32 rkey;
88 __be64 swap_data; /* potentially unaligned */
89 __be64 compare_data; /* potentially unaligned */
90 } __packed;
91
92 union ib_ehdrs {
93 struct {
94 __be32 deth[2];
95 __be32 imm_data;
96 } ud;
97 struct {
98 struct ib_reth reth;
99 __be32 imm_data;
100 } rc;
101 struct {
102 __be32 aeth;
103 __be64 atomic_ack_eth; /* potentially unaligned */
104 } __packed at;
105 __be32 imm_data;
106 __be32 aeth;
107 __be32 ieth;
108 struct ib_atomic_eth atomic_eth;
109 } __packed;
110
111 struct ib_other_headers {
112 __be32 bth[3];
113 union ib_ehdrs u;
114 } __packed;
115
116 struct ib_header {
117 __be16 lrh[4];
118 union {
119 struct {
120 struct ib_grh grh;
121 struct ib_other_headers oth;
122 } l;
123 struct ib_other_headers oth;
124 } u;
125 } __packed;
126
127 /* accessors for unaligned __be64 items */
128
ib_u64_get(__be64 * p)129 static inline u64 ib_u64_get(__be64 *p)
130 {
131 return get_unaligned_be64(p);
132 }
133
ib_u64_put(u64 val,__be64 * p)134 static inline void ib_u64_put(u64 val, __be64 *p)
135 {
136 put_unaligned_be64(val, p);
137 }
138
get_ib_reth_vaddr(struct ib_reth * reth)139 static inline u64 get_ib_reth_vaddr(struct ib_reth *reth)
140 {
141 return ib_u64_get(&reth->vaddr);
142 }
143
put_ib_reth_vaddr(u64 val,struct ib_reth * reth)144 static inline void put_ib_reth_vaddr(u64 val, struct ib_reth *reth)
145 {
146 ib_u64_put(val, &reth->vaddr);
147 }
148
get_ib_ateth_vaddr(struct ib_atomic_eth * ateth)149 static inline u64 get_ib_ateth_vaddr(struct ib_atomic_eth *ateth)
150 {
151 return ib_u64_get(&ateth->vaddr);
152 }
153
put_ib_ateth_vaddr(u64 val,struct ib_atomic_eth * ateth)154 static inline void put_ib_ateth_vaddr(u64 val, struct ib_atomic_eth *ateth)
155 {
156 ib_u64_put(val, &ateth->vaddr);
157 }
158
get_ib_ateth_swap(struct ib_atomic_eth * ateth)159 static inline u64 get_ib_ateth_swap(struct ib_atomic_eth *ateth)
160 {
161 return ib_u64_get(&ateth->swap_data);
162 }
163
put_ib_ateth_swap(u64 val,struct ib_atomic_eth * ateth)164 static inline void put_ib_ateth_swap(u64 val, struct ib_atomic_eth *ateth)
165 {
166 ib_u64_put(val, &ateth->swap_data);
167 }
168
get_ib_ateth_compare(struct ib_atomic_eth * ateth)169 static inline u64 get_ib_ateth_compare(struct ib_atomic_eth *ateth)
170 {
171 return ib_u64_get(&ateth->compare_data);
172 }
173
put_ib_ateth_compare(u64 val,struct ib_atomic_eth * ateth)174 static inline void put_ib_ateth_compare(u64 val, struct ib_atomic_eth *ateth)
175 {
176 ib_u64_put(val, &ateth->compare_data);
177 }
178
179 #endif /* IB_HDRS_H */
180