tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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#define IB_AETH_CREDIT_SHIFT 24
79#define IB_AETH_CREDIT_MASK 0x1F
80#define IB_AETH_CREDIT_INVAL 0x1F
81#define IB_AETH_NAK_SHIFT 29
82#define IB_MSN_MASK 0xFFFFFF
83
84struct ib_reth {
85 __be64 vaddr; /* potentially unaligned */
86 __be32 rkey;
87 __be32 length;
88} __packed;
89
90struct ib_atomic_eth {
91 __be64 vaddr; /* potentially unaligned */
92 __be32 rkey;
93 __be64 swap_data; /* potentially unaligned */
94 __be64 compare_data; /* potentially unaligned */
95} __packed;
96
97union ib_ehdrs {
98 struct {
99 __be32 deth[2];
100 __be32 imm_data;
101 } ud;
102 struct {
103 struct ib_reth reth;
104 __be32 imm_data;
105 } rc;
106 struct {
107 __be32 aeth;
108 __be64 atomic_ack_eth; /* potentially unaligned */
109 } __packed at;
110 __be32 imm_data;
111 __be32 aeth;
112 __be32 ieth;
113 struct ib_atomic_eth atomic_eth;
114} __packed;
115
116struct ib_other_headers {
117 __be32 bth[3];
118 union ib_ehdrs u;
119} __packed;
120
121struct ib_header {
122 __be16 lrh[4];
123 union {
124 struct {
125 struct ib_grh grh;
126 struct ib_other_headers oth;
127 } l;
128 struct ib_other_headers oth;
129 } u;
130} __packed;
131
132/* accessors for unaligned __be64 items */
133
134static inline u64 ib_u64_get(__be64 *p)
135{
136 return get_unaligned_be64(p);
137}
138
139static inline void ib_u64_put(u64 val, __be64 *p)
140{
141 put_unaligned_be64(val, p);
142}
143
144static inline u64 get_ib_reth_vaddr(struct ib_reth *reth)
145{
146 return ib_u64_get(&reth->vaddr);
147}
148
149static inline void put_ib_reth_vaddr(u64 val, struct ib_reth *reth)
150{
151 ib_u64_put(val, &reth->vaddr);
152}
153
154static inline u64 get_ib_ateth_vaddr(struct ib_atomic_eth *ateth)
155{
156 return ib_u64_get(&ateth->vaddr);
157}
158
159static inline void put_ib_ateth_vaddr(u64 val, struct ib_atomic_eth *ateth)
160{
161 ib_u64_put(val, &ateth->vaddr);
162}
163
164static inline u64 get_ib_ateth_swap(struct ib_atomic_eth *ateth)
165{
166 return ib_u64_get(&ateth->swap_data);
167}
168
169static inline void put_ib_ateth_swap(u64 val, struct ib_atomic_eth *ateth)
170{
171 ib_u64_put(val, &ateth->swap_data);
172}
173
174static inline u64 get_ib_ateth_compare(struct ib_atomic_eth *ateth)
175{
176 return ib_u64_get(&ateth->compare_data);
177}
178
179static inline void put_ib_ateth_compare(u64 val, struct ib_atomic_eth *ateth)
180{
181 ib_u64_put(val, &ateth->compare_data);
182}
183
184#endif /* IB_HDRS_H */