drivers/infiniband/hw/usnic/usnic_abi.h

   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
  45 enum 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
  52 struct 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
  64 struct 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 */
  69 struct 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 */