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 */ 128 129 static inline u64 ib_u64_get(__be64 *p) 130 { 131 return get_unaligned_be64(p); 132 } 133 134 static inline void ib_u64_put(u64 val, __be64 *p) 135 { 136 put_unaligned_be64(val, p); 137 } 138 139 static inline u64 get_ib_reth_vaddr(struct ib_reth *reth) 140 { 141 return ib_u64_get(&reth->vaddr); 142 } 143 144 static inline void put_ib_reth_vaddr(u64 val, struct ib_reth *reth) 145 { 146 ib_u64_put(val, &reth->vaddr); 147 } 148 149 static inline u64 get_ib_ateth_vaddr(struct ib_atomic_eth *ateth) 150 { 151 return ib_u64_get(&ateth->vaddr); 152 } 153 154 static inline void put_ib_ateth_vaddr(u64 val, struct ib_atomic_eth *ateth) 155 { 156 ib_u64_put(val, &ateth->vaddr); 157 } 158 159 static inline u64 get_ib_ateth_swap(struct ib_atomic_eth *ateth) 160 { 161 return ib_u64_get(&ateth->swap_data); 162 } 163 164 static inline void put_ib_ateth_swap(u64 val, struct ib_atomic_eth *ateth) 165 { 166 ib_u64_put(val, &ateth->swap_data); 167 } 168 169 static inline u64 get_ib_ateth_compare(struct ib_atomic_eth *ateth) 170 { 171 return ib_u64_get(&ateth->compare_data); 172 } 173 174 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