ib_hdrs.h revision 331769 
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
78struct ib_reth {
79	__be64 vaddr;        /* potentially unaligned */
80	__be32 rkey;
81	__be32 length;
82} __packed;
83
84struct 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
91union 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
110struct ib_other_headers {
111	__be32 bth[3];
112	union ib_ehdrs u;
113} __packed;
114
115struct 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
128static inline u64 ib_u64_get(__be64 *p)
129{
130	return get_unaligned_be64(p);
131}
132
133static inline void ib_u64_put(u64 val, __be64 *p)
134{
135	put_unaligned_be64(val, p);
136}
137
138static inline u64 get_ib_reth_vaddr(struct ib_reth *reth)
139{
140	return ib_u64_get(&reth->vaddr);
141}
142
143static inline void put_ib_reth_vaddr(u64 val, struct ib_reth *reth)
144{
145	ib_u64_put(val, &reth->vaddr);
146}
147
148static inline u64 get_ib_ateth_vaddr(struct ib_atomic_eth *ateth)
149{
150	return ib_u64_get(&ateth->vaddr);
151}
152
153static inline void put_ib_ateth_vaddr(u64 val, struct ib_atomic_eth *ateth)
154{
155	ib_u64_put(val, &ateth->vaddr);
156}
157
158static inline u64 get_ib_ateth_swap(struct ib_atomic_eth *ateth)
159{
160	return ib_u64_get(&ateth->swap_data);
161}
162
163static inline void put_ib_ateth_swap(u64 val, struct ib_atomic_eth *ateth)
164{
165	ib_u64_put(val, &ateth->swap_data);
166}
167
168static inline u64 get_ib_ateth_compare(struct ib_atomic_eth *ateth)
169{
170	return ib_u64_get(&ateth->compare_data);
171}
172
173static 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 */
179