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 * $FreeBSD$
49 */
50
51#ifndef IB_HDRS_H
52#define IB_HDRS_H
53
54#include <linux/types.h>
55#include <asm/unaligned.h>
56#include <rdma/ib_verbs.h>
57
58#define IB_SEQ_NAK	(3 << 29)
59
60/* AETH NAK opcode values */
61#define IB_RNR_NAK                      0x20
62#define IB_NAK_PSN_ERROR                0x60
63#define IB_NAK_INVALID_REQUEST          0x61
64#define IB_NAK_REMOTE_ACCESS_ERROR      0x62
65#define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63
66#define IB_NAK_INVALID_RD_REQUEST       0x64
67
68#define IB_BTH_REQ_ACK		BIT(31)
69#define IB_BTH_SOLICITED	BIT(23)
70#define IB_BTH_MIG_REQ		BIT(22)
71
72#define IB_GRH_VERSION		6
73#define IB_GRH_VERSION_MASK	0xF
74#define IB_GRH_VERSION_SHIFT	28
75#define IB_GRH_TCLASS_MASK	0xFF
76#define IB_GRH_TCLASS_SHIFT	20
77#define IB_GRH_FLOW_MASK	0xFFFFF
78#define IB_GRH_FLOW_SHIFT	0
79#define IB_GRH_NEXT_HDR		0x1B
80
81struct ib_reth {
82	__be64 vaddr;        /* potentially unaligned */
83	__be32 rkey;
84	__be32 length;
85} __packed;
86
87struct ib_atomic_eth {
88	__be64 vaddr;        /* potentially unaligned */
89	__be32 rkey;
90	__be64 swap_data;    /* potentially unaligned */
91	__be64 compare_data; /* potentially unaligned */
92} __packed;
93
94union ib_ehdrs {
95	struct {
96		__be32 deth[2];
97		__be32 imm_data;
98	} ud;
99	struct {
100		struct ib_reth reth;
101		__be32 imm_data;
102	} rc;
103	struct {
104		__be32 aeth;
105		__be64 atomic_ack_eth; /* potentially unaligned */
106	} __packed at;
107	__be32 imm_data;
108	__be32 aeth;
109	__be32 ieth;
110	struct ib_atomic_eth atomic_eth;
111}  __packed;
112
113struct ib_other_headers {
114	__be32 bth[3];
115	union ib_ehdrs u;
116} __packed;
117
118struct ib_header {
119	__be16 lrh[4];
120	union {
121		struct {
122			struct ib_grh grh;
123			struct ib_other_headers oth;
124		} l;
125		struct ib_other_headers oth;
126	} u;
127} __packed;
128
129/* accessors for unaligned __be64 items */
130
131static inline u64 ib_u64_get(__be64 *p)
132{
133	return get_unaligned_be64(p);
134}
135
136static inline void ib_u64_put(u64 val, __be64 *p)
137{
138	put_unaligned_be64(val, p);
139}
140
141static inline u64 get_ib_reth_vaddr(struct ib_reth *reth)
142{
143	return ib_u64_get(&reth->vaddr);
144}
145
146static inline void put_ib_reth_vaddr(u64 val, struct ib_reth *reth)
147{
148	ib_u64_put(val, &reth->vaddr);
149}
150
151static inline u64 get_ib_ateth_vaddr(struct ib_atomic_eth *ateth)
152{
153	return ib_u64_get(&ateth->vaddr);
154}
155
156static inline void put_ib_ateth_vaddr(u64 val, struct ib_atomic_eth *ateth)
157{
158	ib_u64_put(val, &ateth->vaddr);
159}
160
161static inline u64 get_ib_ateth_swap(struct ib_atomic_eth *ateth)
162{
163	return ib_u64_get(&ateth->swap_data);
164}
165
166static inline void put_ib_ateth_swap(u64 val, struct ib_atomic_eth *ateth)
167{
168	ib_u64_put(val, &ateth->swap_data);
169}
170
171static inline u64 get_ib_ateth_compare(struct ib_atomic_eth *ateth)
172{
173	return ib_u64_get(&ateth->compare_data);
174}
175
176static inline void put_ib_ateth_compare(u64 val, struct ib_atomic_eth *ateth)
177{
178	ib_u64_put(val, &ateth->compare_data);
179}
180
181#endif                          /* IB_HDRS_H */
182