1/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR Linux-OpenIB) */
2/*
3 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses. You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 *
15 * - Redistributions of source code must retain the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials
22 * provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34#ifndef RDMA_USER_RXE_H
35#define RDMA_USER_RXE_H
36
37#include <linux/types.h>
38#include <linux/socket.h>
39#include <linux/in.h>
40#include <linux/in6.h>
41
42enum {
43 RXE_NETWORK_TYPE_IPV4 = 1,
44 RXE_NETWORK_TYPE_IPV6 = 2,
45};
46
47union rxe_gid {
48 __u8 raw[16];
49 struct {
50 __be64 subnet_prefix;
51 __be64 interface_id;
52 } global;
53};
54
55struct rxe_global_route {
56 union rxe_gid dgid;
57 __u32 flow_label;
58 __u8 sgid_index;
59 __u8 hop_limit;
60 __u8 traffic_class;
61};
62
63struct rxe_av {
64 __u8 port_num;
65 /* From RXE_NETWORK_TYPE_* */
66 __u8 network_type;
67 __u8 dmac[6];
68 struct rxe_global_route grh;
69 union {
70 struct sockaddr_in _sockaddr_in;
71 struct sockaddr_in6 _sockaddr_in6;
72 } sgid_addr, dgid_addr;
73};
74
75struct rxe_send_wr {
76 __aligned_u64 wr_id;
77 __u32 reserved;
78 __u32 opcode;
79 __u32 send_flags;
80 union {
81 __be32 imm_data;
82 __u32 invalidate_rkey;
83 } ex;
84 union {
85 struct {
86 __aligned_u64 remote_addr;
87 __u32 length;
88 __u32 rkey;
89 __u8 type;
90 __u8 level;
91 } flush;
92 struct {
93 __aligned_u64 remote_addr;
94 __u32 rkey;
95 __u32 reserved;
96 } rdma;
97 struct {
98 __aligned_u64 remote_addr;
99 __aligned_u64 compare_add;
100 __aligned_u64 swap;
101 __u32 rkey;
102 __u32 reserved;
103 } atomic;
104 struct {
105 __u32 remote_qpn;
106 __u32 remote_qkey;
107 __u16 pkey_index;
108 __u16 reserved;
109 __u32 ah_num;
110 __u32 pad[4];
111 struct rxe_av av;
112 } ud;
113 struct {
114 __aligned_u64 addr;
115 __aligned_u64 length;
116 __u32 mr_lkey;
117 __u32 mw_rkey;
118 __u32 rkey;
119 __u32 access;
120 } mw;
121 /* reg is only used by the kernel and is not part of the uapi */
122#ifdef __KERNEL__
123 struct {
124 union {
125 struct ib_mr *mr;
126 __aligned_u64 reserved;
127 };
128 __u32 key;
129 __u32 access;
130 } reg;
131#endif
132 } wr;
133};
134
135struct rxe_sge {
136 __aligned_u64 addr;
137 __u32 length;
138 __u32 lkey;
139};
140
141struct mminfo {
142 __aligned_u64 offset;
143 __u32 size;
144 __u32 pad;
145};
146
147struct rxe_dma_info {
148 __u32 length;
149 __u32 resid;
150 __u32 cur_sge;
151 __u32 num_sge;
152 __u32 sge_offset;
153 __u32 reserved;
154 union {
155 __DECLARE_FLEX_ARRAY(__u8, inline_data);
156 __DECLARE_FLEX_ARRAY(__u8, atomic_wr);
157 __DECLARE_FLEX_ARRAY(struct rxe_sge, sge);
158 };
159};
160
161struct rxe_send_wqe {
162 struct rxe_send_wr wr;
163 __u32 status;
164 __u32 state;
165 __aligned_u64 iova;
166 __u32 mask;
167 __u32 first_psn;
168 __u32 last_psn;
169 __u32 ack_length;
170 __u32 ssn;
171 __u32 has_rd_atomic;
172 struct rxe_dma_info dma;
173};
174
175struct rxe_recv_wqe {
176 __aligned_u64 wr_id;
177 __u32 reserved;
178 __u32 padding;
179 struct rxe_dma_info dma;
180};
181
182struct rxe_create_ah_resp {
183 __u32 ah_num;
184 __u32 reserved;
185};
186
187struct rxe_create_cq_resp {
188 struct mminfo mi;
189};
190
191struct rxe_resize_cq_resp {
192 struct mminfo mi;
193};
194
195struct rxe_create_qp_resp {
196 struct mminfo rq_mi;
197 struct mminfo sq_mi;
198};
199
200struct rxe_create_srq_resp {
201 struct mminfo mi;
202 __u32 srq_num;
203 __u32 reserved;
204};
205
206struct rxe_modify_srq_cmd {
207 __aligned_u64 mmap_info_addr;
208};
209
210/* This data structure is stored at the base of work and
211 * completion queues shared between user space and kernel space.
212 * It contains the producer and consumer indices. Is also
213 * contains a copy of the queue size parameters for user space
214 * to use but the kernel must use the parameters in the
215 * rxe_queue struct. For performance reasons arrange to have
216 * producer and consumer indices in separate cache lines
217 * the kernel should always mask the indices to avoid accessing
218 * memory outside of the data area
219 */
220struct rxe_queue_buf {
221 __u32 log2_elem_size;
222 __u32 index_mask;
223 __u32 pad_1[30];
224 __u32 producer_index;
225 __u32 pad_2[31];
226 __u32 consumer_index;
227 __u32 pad_3[31];
228 __u8 data[];
229};
230
231#endif /* RDMA_USER_RXE_H */
232

source code of linux/include/uapi/rdma/rdma_user_rxe.h