LXR linux/drivers/infiniband/hw/usnic/usnic

   1/*
   2 * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
   3 *
   4 * This software is available to you under a choice of one of two
   5 * licenses.  You may choose to be licensed under the terms of the GNU
   6 * General Public License (GPL) Version 2, available from the file
   7 * COPYING in the main directory of this source tree, or the
   8 * BSD license below:
   9 *
  10 *     Redistribution and use in source and binary forms, with or
  11 *     without modification, are permitted provided that the following
  12 *     conditions are met:
  13 *
  14 *      - Redistributions of source code must retain the above
  15 *        copyright notice, this list of conditions and the following
  16 *        disclaimer.
  17 *
  18 *      - Redistributions in binary form must reproduce the above
  19 *        copyright notice, this list of conditions and the following
  20 *        disclaimer in the documentation and/or other materials
  21 *        provided with the distribution.
  22 *
  23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30 * SOFTWARE.
  31 *
  32 */
  33
  34
  35#ifndef USNIC_ABI_H
  36#define USNIC_ABI_H
  37
  38/* ABI between userspace and kernel */
  39#define USNIC_UVERBS_ABI_VERSION        4
  40
  41#define USNIC_QP_GRP_MAX_WQS            8
  42#define USNIC_QP_GRP_MAX_RQS            8
  43#define USNIC_QP_GRP_MAX_CQS            16
  44
  45enum usnic_transport_type {
  46        USNIC_TRANSPORT_UNKNOWN         = 0,
  47        USNIC_TRANSPORT_ROCE_CUSTOM     = 1,
  48        USNIC_TRANSPORT_IPV4_UDP        = 2,
  49        USNIC_TRANSPORT_MAX             = 3,
  50};
  51
  52struct usnic_transport_spec {
  53        enum usnic_transport_type       trans_type;
  54        union {
  55                struct {
  56                        uint16_t        port_num;
  57                } usnic_roce;
  58                struct {
  59                        uint32_t        sock_fd;
  60                } udp;
  61        };
  62};
  63
  64struct usnic_ib_create_qp_cmd {
  65        struct usnic_transport_spec     spec;
  66};
  67
  68/*TODO: Future - usnic_modify_qp needs to pass in generic filters */
  69struct usnic_ib_create_qp_resp {
  70        u32                             vfid;
  71        u32                             qp_grp_id;
  72        u64                             bar_bus_addr;
  73        u32                             bar_len;
  74/*
  75 * WQ, RQ, CQ are explicity specified bc exposing a generic resources inteface
  76 * expands the scope of ABI to many files.
  77 */
  78        u32                             wq_cnt;
  79        u32                             rq_cnt;
  80        u32                             cq_cnt;
  81        u32                             wq_idx[USNIC_QP_GRP_MAX_WQS];
  82        u32                             rq_idx[USNIC_QP_GRP_MAX_RQS];
  83        u32                             cq_idx[USNIC_QP_GRP_MAX_CQS];
  84        u32                             transport;
  85        u32                             reserved[9];
  86};
  87
  88#endif /* USNIC_ABI_H */
  89