LXR linux/drivers/infiniband/core/cm

   1/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
   2/*
   3 * Copyright (c) 2004, 2011 Intel Corporation.  All rights reserved.
   4 * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
   5 * Copyright (c) 2004 Voltaire Corporation.  All rights reserved.
   6 * Copyright (c) 2019, Mellanox Technologies inc.  All rights reserved.
   7 */
   8#ifndef CM_MSGS_H
   9#define CM_MSGS_H
  10
  11#include <rdma/ibta_vol1_c12.h>
  12#include <rdma/ib_mad.h>
  13#include <rdma/ib_cm.h>
  14
  15/*
  16 * Parameters to routines below should be in network-byte order, and values
  17 * are returned in network-byte order.
  18 */
  19
  20#define IB_CM_CLASS_VERSION     2 /* IB specification 1.2 */
  21
  22static inline enum ib_qp_type cm_req_get_qp_type(struct cm_req_msg *req_msg)
  23{
  24        u8 transport_type = IBA_GET(CM_REQ_TRANSPORT_SERVICE_TYPE, req_msg);
  25        switch (transport_type) {
  26        case 0: return IB_QPT_RC;
  27        case 1: return IB_QPT_UC;
  28        case 3:
  29                switch (IBA_GET(CM_REQ_EXTENDED_TRANSPORT_TYPE, req_msg)) {
  30                case 1: return IB_QPT_XRC_TGT;
  31                default: return 0;
  32                }
  33        default: return 0;
  34        }
  35}
  36
  37static inline void cm_req_set_qp_type(struct cm_req_msg *req_msg,
  38                                      enum ib_qp_type qp_type)
  39{
  40        switch (qp_type) {
  41        case IB_QPT_UC:
  42                IBA_SET(CM_REQ_TRANSPORT_SERVICE_TYPE, req_msg, 1);
  43                break;
  44        case IB_QPT_XRC_INI:
  45                IBA_SET(CM_REQ_TRANSPORT_SERVICE_TYPE, req_msg, 3);
  46                IBA_SET(CM_REQ_EXTENDED_TRANSPORT_TYPE, req_msg, 1);
  47                break;
  48        default:
  49                IBA_SET(CM_REQ_TRANSPORT_SERVICE_TYPE, req_msg, 0);
  50        }
  51}
  52
  53/* Message REJected or MRAed */
  54enum cm_msg_response {
  55        CM_MSG_RESPONSE_REQ = 0x0,
  56        CM_MSG_RESPONSE_REP = 0x1,
  57        CM_MSG_RESPONSE_OTHER = 0x2
  58};
  59
  60static inline __be32 cm_rep_get_qpn(struct cm_rep_msg *rep_msg, enum ib_qp_type qp_type)
  61{
  62        return (qp_type == IB_QPT_XRC_INI) ?
  63                       cpu_to_be32(IBA_GET(CM_REP_LOCAL_EE_CONTEXT_NUMBER,
  64                                           rep_msg)) :
  65                       cpu_to_be32(IBA_GET(CM_REP_LOCAL_QPN, rep_msg));
  66}
  67
  68#endif /* CM_MSGS_H */
  69