include/uapi/rdma/rdma_user_rxe.h

   1 /* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR Linux-OpenIB) */
   2 /*
   3  * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #ifndef RDMA_USER_RXE_H
  35 #define RDMA_USER_RXE_H
  36
  37 #include <linux/types.h>
  38 #include <linux/socket.h>
  39 #include <linux/in.h>
  40 #include <linux/in6.h>
  41
  42 enum {
  43         RXE_NETWORK_TYPE_IPV4 = 1,
  44         RXE_NETWORK_TYPE_IPV6 = 2,
  45 };
  46
  47 union rxe_gid {
  48         __u8    raw[16];
  49         struct {
  50                 __be64  subnet_prefix;
  51                 __be64  interface_id;
  52         } global;
  53 };
  54
  55 struct rxe_global_route {
  56         union rxe_gid   dgid;
  57         __u32           flow_label;
  58         __u8            sgid_index;
  59         __u8            hop_limit;
  60         __u8            traffic_class;
  61 };
  62
  63 struct rxe_av {
  64         __u8                    port_num;
  65         /* From RXE_NETWORK_TYPE_* */
  66         __u8                    network_type;
  67         __u8                    dmac[6];
  68         struct rxe_global_route grh;
  69         union {
  70                 struct sockaddr_in      _sockaddr_in;
  71                 struct sockaddr_in6     _sockaddr_in6;
  72         } sgid_addr, dgid_addr;
  73 };
  74
  75 struct rxe_send_wr {
  76         __aligned_u64           wr_id;
  77         __u32                   num_sge;
  78         __u32                   opcode;
  79         __u32                   send_flags;
  80         union {
  81                 __be32          imm_data;
  82                 __u32           invalidate_rkey;
  83         } ex;
  84         union {
  85                 struct {
  86                         __aligned_u64 remote_addr;
  87                         __u32   rkey;
  88                         __u32   reserved;
  89                 } rdma;
  90                 struct {
  91                         __aligned_u64 remote_addr;
  92                         __aligned_u64 compare_add;
  93                         __aligned_u64 swap;
  94                         __u32   rkey;
  95                         __u32   reserved;
  96                 } atomic;
  97                 struct {
  98                         __u32   remote_qpn;
  99                         __u32   remote_qkey;
 100                         __u16   pkey_index;
 101                 } ud;
 102                 /* reg is only used by the kernel and is not part of the uapi */
 103                 struct {
 104                         union {
 105                                 struct ib_mr *mr;
 106                                 __aligned_u64 reserved;
 107                         };
 108                         __u32        key;
 109                         __u32        access;
 110                 } reg;
 111         } wr;
 112 };
 113
 114 struct rxe_sge {
 115         __aligned_u64 addr;
 116         __u32   length;
 117         __u32   lkey;
 118 };
 119
 120 struct mminfo {
 121         __aligned_u64           offset;
 122         __u32                   size;
 123         __u32                   pad;
 124 };
 125
 126 struct rxe_dma_info {
 127         __u32                   length;
 128         __u32                   resid;
 129         __u32                   cur_sge;
 130         __u32                   num_sge;
 131         __u32                   sge_offset;
 132         __u32                   reserved;
 133         union {
 134                 __u8            inline_data[0];
 135                 struct rxe_sge  sge[0];
 136         };
 137 };
 138
 139 struct rxe_send_wqe {
 140         struct rxe_send_wr      wr;
 141         struct rxe_av           av;
 142         __u32                   status;
 143         __u32                   state;
 144         __aligned_u64           iova;
 145         __u32                   mask;
 146         __u32                   first_psn;
 147         __u32                   last_psn;
 148         __u32                   ack_length;
 149         __u32                   ssn;
 150         __u32                   has_rd_atomic;
 151         struct rxe_dma_info     dma;
 152 };
 153
 154 struct rxe_recv_wqe {
 155         __aligned_u64           wr_id;
 156         __u32                   num_sge;
 157         __u32                   padding;
 158         struct rxe_dma_info     dma;
 159 };
 160
 161 struct rxe_create_cq_resp {
 162         struct mminfo mi;
 163 };
 164
 165 struct rxe_resize_cq_resp {
 166         struct mminfo mi;
 167 };
 168
 169 struct rxe_create_qp_resp {
 170         struct mminfo rq_mi;
 171         struct mminfo sq_mi;
 172 };
 173
 174 struct rxe_create_srq_resp {
 175         struct mminfo mi;
 176         __u32 srq_num;
 177         __u32 reserved;
 178 };
 179
 180 struct rxe_modify_srq_cmd {
 181         __aligned_u64 mmap_info_addr;
 182 };
 183
 184 /* This data structure is stored at the base of work and
 185  * completion queues shared between user space and kernel space.
 186  * It contains the producer and consumer indices. Is also
 187  * contains a copy of the queue size parameters for user space
 188  * to use but the kernel must use the parameters in the
 189  * rxe_queue struct. For performance reasons arrange to have
 190  * producer and consumer indices in separate cache lines
 191  * the kernel should always mask the indices to avoid accessing
 192  * memory outside of the data area
 193  */
 194 struct rxe_queue_buf {
 195         __u32                   log2_elem_size;
 196         __u32                   index_mask;
 197         __u32                   pad_1[30];
 198         __u32                   producer_index;
 199         __u32                   pad_2[31];
 200         __u32                   consumer_index;
 201         __u32                   pad_3[31];
 202         __u8                    data[];
 203 };
 204
 205 #endif /* RDMA_USER_RXE_H */