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