drivers/infiniband/hw/usnic/usnic_abi.h

   1 /*
   2  * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
   3  *
   4  * This program is free software; you may redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   9  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  10  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  11  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  12  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  13  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  14  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  15  * SOFTWARE.
  16  *
  17  */
  18
  19
  20 #ifndef USNIC_ABI_H
  21 #define USNIC_ABI_H
  22
  23 /* ABI between userspace and kernel */
  24 #define USNIC_UVERBS_ABI_VERSION        4
  25
  26 #define USNIC_QP_GRP_MAX_WQS            8
  27 #define USNIC_QP_GRP_MAX_RQS            8
  28 #define USNIC_QP_GRP_MAX_CQS            16
  29
  30 enum usnic_transport_type {
  31         USNIC_TRANSPORT_UNKNOWN         = 0,
  32         USNIC_TRANSPORT_ROCE_CUSTOM     = 1,
  33         USNIC_TRANSPORT_IPV4_UDP        = 2,
  34         USNIC_TRANSPORT_MAX             = 3,
  35 };
  36
  37 struct usnic_transport_spec {
  38         enum usnic_transport_type       trans_type;
  39         union {
  40                 struct {
  41                         uint16_t        port_num;
  42                 } usnic_roce;
  43                 struct {
  44                         uint32_t        sock_fd;
  45                 } udp;
  46         };
  47 };
  48
  49 struct usnic_ib_create_qp_cmd {
  50         struct usnic_transport_spec     spec;
  51 };
  52
  53 /*TODO: Future - usnic_modify_qp needs to pass in generic filters */
  54 struct usnic_ib_create_qp_resp {
  55         u32                             vfid;
  56         u32                             qp_grp_id;
  57         u64                             bar_bus_addr;
  58         u32                             bar_len;
  59 /*
  60  * WQ, RQ, CQ are explicity specified bc exposing a generic resources inteface
  61  * expands the scope of ABI to many files.
  62  */
  63         u32                             wq_cnt;
  64         u32                             rq_cnt;
  65         u32                             cq_cnt;
  66         u32                             wq_idx[USNIC_QP_GRP_MAX_WQS];
  67         u32                             rq_idx[USNIC_QP_GRP_MAX_RQS];
  68         u32                             cq_idx[USNIC_QP_GRP_MAX_CQS];
  69         u32                             transport;
  70         u32                             reserved[9];
  71 };
  72
  73 #endif /* USNIC_ABI_H */