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 81 struct ib_reth { 82 __be64 vaddr; /* potentially unaligned */ 83 __be32 rkey; 84 __be32 length; 85 } __packed; 86 87 struct 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 94 union 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; 112 113 struct ib_other_headers { 114 __be32 bth[3]; 115 union ib_ehdrs u; 116 } __packed; 117 118 struct 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 */ 130 131 static inline u64 ib_u64_get(__be64 *p) 132 { 133 return get_unaligned_be64(p); 134 } 135 136 static inline void ib_u64_put(u64 val, __be64 *p) 137 { 138 put_unaligned_be64(val, p); 139 } 140 141 static inline u64 get_ib_reth_vaddr(struct ib_reth *reth) 142 { 143 return ib_u64_get(&reth->vaddr); 144 } 145 146 static inline void put_ib_reth_vaddr(u64 val, struct ib_reth *reth) 147 { 148 ib_u64_put(val, &reth->vaddr); 149 } 150 151 static inline u64 get_ib_ateth_vaddr(struct ib_atomic_eth *ateth) 152 { 153 return ib_u64_get(&ateth->vaddr); 154 } 155 156 static inline void put_ib_ateth_vaddr(u64 val, struct ib_atomic_eth *ateth) 157 { 158 ib_u64_put(val, &ateth->vaddr); 159 } 160 161 static inline u64 get_ib_ateth_swap(struct ib_atomic_eth *ateth) 162 { 163 return ib_u64_get(&ateth->swap_data); 164 } 165 166 static inline void put_ib_ateth_swap(u64 val, struct ib_atomic_eth *ateth) 167 { 168 ib_u64_put(val, &ateth->swap_data); 169 } 170 171 static inline u64 get_ib_ateth_compare(struct ib_atomic_eth *ateth) 172 { 173 return ib_u64_get(&ateth->compare_data); 174 } 175 176 static 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