LXR linux/include/rdma/ib

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