drivers/infiniband/core/cm_msgs.h

   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
  22 static 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
  37 static 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 */
  54 enum cm_msg_response {
  55         CM_MSG_RESPONSE_REQ = 0x0,
  56         CM_MSG_RESPONSE_REP = 0x1,
  57         CM_MSG_RESPONSE_OTHER = 0x2
  58 };
  59
  60 static 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 */