1 /*
2  * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
3  *
4  * This software is available to you under a choice of one of two
5  * licenses.  You may choose to be licensed under the terms of the GNU
6  * General Public License (GPL) Version 2, available from the file
7  * COPYING in the main directory of this source tree, or the
8  * BSD license below:
9  *
10  *     Redistribution and use in source and binary forms, with or
11  *     without modification, are permitted provided that the following
12  *     conditions are met:
13  *
14  *      - Redistributions of source code must retain the above
15  *        copyright notice, this list of conditions and the following
16  *        disclaimer.
17  *
18  *      - Redistributions in binary form must reproduce the above
19  *        copyright notice, this list of conditions and the following
20  *        disclaimer in the documentation and/or other materials
21  *        provided with the distribution.
22  *
23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30  * SOFTWARE.
31  *
32  */
33 
34 
35 #ifndef USNIC_ABI_H
36 #define USNIC_ABI_H
37 
38 /* ABI between userspace and kernel */
39 #define USNIC_UVERBS_ABI_VERSION	4
40 
41 #define USNIC_QP_GRP_MAX_WQS		8
42 #define USNIC_QP_GRP_MAX_RQS		8
43 #define USNIC_QP_GRP_MAX_CQS		16
44 
45 enum usnic_transport_type {
46 	USNIC_TRANSPORT_UNKNOWN		= 0,
47 	USNIC_TRANSPORT_ROCE_CUSTOM	= 1,
48 	USNIC_TRANSPORT_IPV4_UDP	= 2,
49 	USNIC_TRANSPORT_MAX		= 3,
50 };
51 
52 struct usnic_transport_spec {
53 	enum usnic_transport_type	trans_type;
54 	union {
55 		struct {
56 			uint16_t	port_num;
57 		} usnic_roce;
58 		struct {
59 			uint32_t	sock_fd;
60 		} udp;
61 	};
62 };
63 
64 struct usnic_ib_create_qp_cmd {
65 	struct usnic_transport_spec	spec;
66 };
67 
68 /*TODO: Future - usnic_modify_qp needs to pass in generic filters */
69 struct usnic_ib_create_qp_resp {
70 	u32				vfid;
71 	u32				qp_grp_id;
72 	u64				bar_bus_addr;
73 	u32				bar_len;
74 /*
75  * WQ, RQ, CQ are explicity specified bc exposing a generic resources inteface
76  * expands the scope of ABI to many files.
77  */
78 	u32				wq_cnt;
79 	u32				rq_cnt;
80 	u32				cq_cnt;
81 	u32				wq_idx[USNIC_QP_GRP_MAX_WQS];
82 	u32				rq_idx[USNIC_QP_GRP_MAX_RQS];
83 	u32				cq_idx[USNIC_QP_GRP_MAX_CQS];
84 	u32				transport;
85 	u32				reserved[9];
86 };
87 
88 #endif /* USNIC_ABI_H */
89