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        2
  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_MAX             = 2,
  34 };
  35
  36 struct usnic_transport_spec {
  37         enum usnic_transport_type       trans_type;
  38         union {
  39                 struct {
  40                         uint16_t        port_num;
  41                 } usnic_roce;
  42         };
  43 };
  44
  45 /*TODO: Future - usnic_modify_qp needs to pass in generic filters */
  46 struct usnic_ib_create_qp_resp {
  47         u32                             vfid;
  48         u32                             qp_grp_id;
  49         u64                             bar_bus_addr;
  50         u32                             bar_len;
  51 /*
  52  * WQ, RQ, CQ are explicity specified bc exposing a generic resources inteface
  53  * expands the scope of ABI to many files.
  54  */
  55         u32                             wq_cnt;
  56         u32                             rq_cnt;
  57         u32                             cq_cnt;
  58         u32                             wq_idx[USNIC_QP_GRP_MAX_WQS];
  59         u32                             rq_idx[USNIC_QP_GRP_MAX_RQS];
  60         u32                             cq_idx[USNIC_QP_GRP_MAX_CQS];
  61         u32                             transport;
  62         u32                             reserved[9];
  63 };
  64
  65 #endif /* USNIC_ABI_H */