include/rdma/ib_hdrs.h

   1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
   2 /*
   3  * Copyright(c) 2016 - 2018 Intel Corporation.
   4  */
   5
   6 #ifndef IB_HDRS_H
   7 #define IB_HDRS_H
   8
   9 #include <linux/types.h>
  10 #include <linux/unaligned.h>
  11 #include <rdma/ib_verbs.h>
  12
  13 #define IB_SEQ_NAK      (3 << 29)
  14
  15 /* AETH NAK opcode values */
  16 #define IB_RNR_NAK                      0x20
  17 #define IB_NAK_PSN_ERROR                0x60
  18 #define IB_NAK_INVALID_REQUEST          0x61
  19 #define IB_NAK_REMOTE_ACCESS_ERROR      0x62
  20 #define IB_NAK_REMOTE_OPERATIONAL_ERROR 0x63
  21 #define IB_NAK_INVALID_RD_REQUEST       0x64
  22
  23 #define IB_BTH_REQ_ACK          BIT(31)
  24 #define IB_BTH_SOLICITED        BIT(23)
  25 #define IB_BTH_MIG_REQ          BIT(22)
  26
  27 #define IB_GRH_VERSION          6
  28 #define IB_GRH_VERSION_MASK     0xF
  29 #define IB_GRH_VERSION_SHIFT    28
  30 #define IB_GRH_TCLASS_MASK      0xFF
  31 #define IB_GRH_TCLASS_SHIFT     20
  32 #define IB_GRH_FLOW_MASK        0xFFFFF
  33 #define IB_GRH_FLOW_SHIFT       0
  34 #define IB_GRH_NEXT_HDR         0x1B
  35 #define IB_FECN_SHIFT 31
  36 #define IB_FECN_MASK 1
  37 #define IB_FECN_SMASK BIT(IB_FECN_SHIFT)
  38 #define IB_BECN_SHIFT 30
  39 #define IB_BECN_MASK 1
  40 #define IB_BECN_SMASK BIT(IB_BECN_SHIFT)
  41
  42 #define IB_AETH_CREDIT_SHIFT    24
  43 #define IB_AETH_CREDIT_MASK     0x1F
  44 #define IB_AETH_CREDIT_INVAL    0x1F
  45 #define IB_AETH_NAK_SHIFT       29
  46 #define IB_MSN_MASK             0xFFFFFF
  47
  48 struct ib_reth {
  49         __be64 vaddr;        /* potentially unaligned */
  50         __be32 rkey;
  51         __be32 length;
  52 } __packed;
  53
  54 struct ib_atomic_eth {
  55         __be64 vaddr;        /* potentially unaligned */
  56         __be32 rkey;
  57         __be64 swap_data;    /* potentially unaligned */
  58         __be64 compare_data; /* potentially unaligned */
  59 } __packed;
  60
  61 #include <rdma/tid_rdma_defs.h>
  62
  63 union ib_ehdrs {
  64         struct {
  65                 __be32 deth[2];
  66                 __be32 imm_data;
  67         } ud;
  68         struct {
  69                 struct ib_reth reth;
  70                 __be32 imm_data;
  71         } rc;
  72         struct {
  73                 __be32 aeth;
  74                 __be64 atomic_ack_eth; /* potentially unaligned */
  75         } __packed at;
  76         __be32 imm_data;
  77         __be32 aeth;
  78         __be32 ieth;
  79         struct ib_atomic_eth atomic_eth;
  80         /* TID RDMA headers */
  81         union {
  82                 struct tid_rdma_read_req r_req;
  83                 struct tid_rdma_read_resp r_rsp;
  84                 struct tid_rdma_write_req w_req;
  85                 struct tid_rdma_write_resp w_rsp;
  86                 struct tid_rdma_write_data w_data;
  87                 struct tid_rdma_resync resync;
  88                 struct tid_rdma_ack ack;
  89         } tid_rdma;
  90 }  __packed;
  91
  92 struct ib_other_headers {
  93         __be32 bth[3];
  94         union ib_ehdrs u;
  95 } __packed;
  96
  97 struct ib_header {
  98         __be16 lrh[4];
  99         union {
 100                 struct {
 101                         struct ib_grh grh;
 102                         struct ib_other_headers oth;
 103                 } l;
 104                 struct ib_other_headers oth;
 105         } u;
 106 } __packed;
 107
 108 /* accessors for unaligned __be64 items */
 109
 110 static inline u64 ib_u64_get(__be64 *p)
 111 {
 112         return get_unaligned_be64(p);
 113 }
 114
 115 static inline void ib_u64_put(u64 val, __be64 *p)
 116 {
 117         put_unaligned_be64(val, p);
 118 }
 119
 120 static inline u64 get_ib_reth_vaddr(struct ib_reth *reth)
 121 {
 122         return ib_u64_get(&reth->vaddr);
 123 }
 124
 125 static inline void put_ib_reth_vaddr(u64 val, struct ib_reth *reth)
 126 {
 127         ib_u64_put(val, &reth->vaddr);
 128 }
 129
 130 static inline u64 get_ib_ateth_vaddr(struct ib_atomic_eth *ateth)
 131 {
 132         return ib_u64_get(&ateth->vaddr);
 133 }
 134
 135 static inline void put_ib_ateth_vaddr(u64 val, struct ib_atomic_eth *ateth)
 136 {
 137         ib_u64_put(val, &ateth->vaddr);
 138 }
 139
 140 static inline u64 get_ib_ateth_swap(struct ib_atomic_eth *ateth)
 141 {
 142         return ib_u64_get(&ateth->swap_data);
 143 }
 144
 145 static inline void put_ib_ateth_swap(u64 val, struct ib_atomic_eth *ateth)
 146 {
 147         ib_u64_put(val, &ateth->swap_data);
 148 }
 149
 150 static inline u64 get_ib_ateth_compare(struct ib_atomic_eth *ateth)
 151 {
 152         return ib_u64_get(&ateth->compare_data);
 153 }
 154
 155 static inline void put_ib_ateth_compare(u64 val, struct ib_atomic_eth *ateth)
 156 {
 157         ib_u64_put(val, &ateth->compare_data);
 158 }
 159
 160 /*
 161  * 9B/IB Packet Format
 162  */
 163 #define IB_LNH_MASK             3
 164 #define IB_SC_MASK              0xf
 165 #define IB_SC_SHIFT             12
 166 #define IB_SC5_MASK             0x10
 167 #define IB_SL_MASK              0xf
 168 #define IB_SL_SHIFT             4
 169 #define IB_SL_SHIFT             4
 170 #define IB_LVER_MASK    0xf
 171 #define IB_LVER_SHIFT   8
 172
 173 static inline u8 ib_get_lnh(struct ib_header *hdr)
 174 {
 175         return (be16_to_cpu(hdr->lrh[0]) & IB_LNH_MASK);
 176 }
 177
 178 static inline u8 ib_get_sc(struct ib_header *hdr)
 179 {
 180         return ((be16_to_cpu(hdr->lrh[0]) >> IB_SC_SHIFT) & IB_SC_MASK);
 181 }
 182
 183 static inline bool ib_is_sc5(u16 sc5)
 184 {
 185         return !!(sc5 & IB_SC5_MASK);
 186 }
 187
 188 static inline u8 ib_get_sl(struct ib_header *hdr)
 189 {
 190         return ((be16_to_cpu(hdr->lrh[0]) >> IB_SL_SHIFT) & IB_SL_MASK);
 191 }
 192
 193 static inline u16 ib_get_dlid(struct ib_header *hdr)
 194 {
 195         return (be16_to_cpu(hdr->lrh[1]));
 196 }
 197
 198 static inline u16 ib_get_slid(struct ib_header *hdr)
 199 {
 200         return (be16_to_cpu(hdr->lrh[3]));
 201 }
 202
 203 static inline u8 ib_get_lver(struct ib_header *hdr)
 204 {
 205         return (u8)((be16_to_cpu(hdr->lrh[0]) >> IB_LVER_SHIFT) &
 206                    IB_LVER_MASK);
 207 }
 208
 209 static inline u32 ib_get_qkey(struct ib_other_headers *ohdr)
 210 {
 211         return be32_to_cpu(ohdr->u.ud.deth[0]);
 212 }
 213
 214 static inline u32 ib_get_sqpn(struct ib_other_headers *ohdr)
 215 {
 216         return ((be32_to_cpu(ohdr->u.ud.deth[1])) & IB_QPN_MASK);
 217 }
 218
 219 /*
 220  * BTH
 221  */
 222 #define IB_BTH_OPCODE_MASK      0xff
 223 #define IB_BTH_OPCODE_SHIFT     24
 224 #define IB_BTH_PAD_MASK 3
 225 #define IB_BTH_PKEY_MASK        0xffff
 226 #define IB_BTH_PAD_SHIFT        20
 227 #define IB_BTH_A_MASK           1
 228 #define IB_BTH_A_SHIFT          31
 229 #define IB_BTH_M_MASK           1
 230 #define IB_BTH_M_SHIFT          22
 231 #define IB_BTH_SE_MASK          1
 232 #define IB_BTH_SE_SHIFT 23
 233 #define IB_BTH_TVER_MASK        0xf
 234 #define IB_BTH_TVER_SHIFT       16
 235 #define IB_BTH_OPCODE_CNP       0x81
 236
 237 static inline u8 ib_bth_get_pad(struct ib_other_headers *ohdr)
 238 {
 239         return ((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_PAD_SHIFT) &
 240                    IB_BTH_PAD_MASK);
 241 }
 242
 243 static inline u16 ib_bth_get_pkey(struct ib_other_headers *ohdr)
 244 {
 245         return (be32_to_cpu(ohdr->bth[0]) & IB_BTH_PKEY_MASK);
 246 }
 247
 248 static inline u8 ib_bth_get_opcode(struct ib_other_headers *ohdr)
 249 {
 250         return ((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_OPCODE_SHIFT) &
 251                    IB_BTH_OPCODE_MASK);
 252 }
 253
 254 static inline u8 ib_bth_get_ackreq(struct ib_other_headers *ohdr)
 255 {
 256         return (u8)((be32_to_cpu(ohdr->bth[2]) >> IB_BTH_A_SHIFT) &
 257                    IB_BTH_A_MASK);
 258 }
 259
 260 static inline u8 ib_bth_get_migreq(struct ib_other_headers *ohdr)
 261 {
 262         return (u8)((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_M_SHIFT) &
 263                     IB_BTH_M_MASK);
 264 }
 265
 266 static inline u8 ib_bth_get_se(struct ib_other_headers *ohdr)
 267 {
 268         return (u8)((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_SE_SHIFT) &
 269                     IB_BTH_SE_MASK);
 270 }
 271
 272 static inline u32 ib_bth_get_psn(struct ib_other_headers *ohdr)
 273 {
 274         return (u32)(be32_to_cpu(ohdr->bth[2]));
 275 }
 276
 277 static inline u32 ib_bth_get_qpn(struct ib_other_headers *ohdr)
 278 {
 279         return (u32)((be32_to_cpu(ohdr->bth[1])) & IB_QPN_MASK);
 280 }
 281
 282 static inline bool ib_bth_get_becn(struct ib_other_headers *ohdr)
 283 {
 284         return (ohdr->bth[1]) & cpu_to_be32(IB_BECN_SMASK);
 285 }
 286
 287 static inline bool ib_bth_get_fecn(struct ib_other_headers *ohdr)
 288 {
 289         return (ohdr->bth[1]) & cpu_to_be32(IB_FECN_SMASK);
 290 }
 291
 292 static inline u8 ib_bth_get_tver(struct ib_other_headers *ohdr)
 293 {
 294         return (u8)((be32_to_cpu(ohdr->bth[0]) >> IB_BTH_TVER_SHIFT)  &
 295                     IB_BTH_TVER_MASK);
 296 }
 297
 298 static inline bool ib_bth_is_solicited(struct ib_other_headers *ohdr)
 299 {
 300         return ohdr->bth[0] & cpu_to_be32(IB_BTH_SOLICITED);
 301 }
 302
 303 static inline bool ib_bth_is_migration(struct ib_other_headers *ohdr)
 304 {
 305         return ohdr->bth[0] & cpu_to_be32(IB_BTH_MIG_REQ);
 306 }
 307 #endif                          /* IB_HDRS_H */