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 84 struct ib_reth { 85 __be64 vaddr; /* potentially unaligned */ 86 __be32 rkey; 87 __be32 length; 88 } __packed; 89 90 struct 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 97 union 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; 115 116 struct ib_other_headers { 117 __be32 bth[3]; 118 union ib_ehdrs u; 119 } __packed; 120 121 struct 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 */ 133 134 static inline u64 ib_u64_get(__be64 *p) 135 { 136 return get_unaligned_be64(p); 137 } 138 139 static inline void ib_u64_put(u64 val, __be64 *p) 140 { 141 put_unaligned_be64(val, p); 142 } 143 144 static inline u64 get_ib_reth_vaddr(struct ib_reth *reth) 145 { 146 return ib_u64_get(&reth->vaddr); 147 } 148 149 static inline void put_ib_reth_vaddr(u64 val, struct ib_reth *reth) 150 { 151 ib_u64_put(val, &reth->vaddr); 152 } 153 154 static inline u64 get_ib_ateth_vaddr(struct ib_atomic_eth *ateth) 155 { 156 return ib_u64_get(&ateth->vaddr); 157 } 158 159 static inline void put_ib_ateth_vaddr(u64 val, struct ib_atomic_eth *ateth) 160 { 161 ib_u64_put(val, &ateth->vaddr); 162 } 163 164 static inline u64 get_ib_ateth_swap(struct ib_atomic_eth *ateth) 165 { 166 return ib_u64_get(&ateth->swap_data); 167 } 168 169 static inline void put_ib_ateth_swap(u64 val, struct ib_atomic_eth *ateth) 170 { 171 ib_u64_put(val, &ateth->swap_data); 172 } 173 174 static inline u64 get_ib_ateth_compare(struct ib_atomic_eth *ateth) 175 { 176 return ib_u64_get(&ateth->compare_data); 177 } 178 179 static 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 */ 185