1/* SPDX-License-Identifier: (GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause */
2
3/* Authors: Bernard Metzler <bmt@zurich.ibm.com> */
4/* Copyright (c) 2008-2019, IBM Corporation */
5
6#ifndef _SIW_USER_H
7#define _SIW_USER_H
8
9#include <linux/types.h>
10
11#define SIW_NODE_DESC_COMMON "Software iWARP stack"
12#define SIW_ABI_VERSION 1
13#define SIW_MAX_SGE 6
14#define SIW_UOBJ_MAX_KEY 0x08FFFF
15#define SIW_INVAL_UOBJ_KEY (SIW_UOBJ_MAX_KEY + 1)
16
17struct siw_uresp_create_cq {
18 __u32 cq_id;
19 __u32 num_cqe;
20 __aligned_u64 cq_key;
21};
22
23struct siw_uresp_create_qp {
24 __u32 qp_id;
25 __u32 num_sqe;
26 __u32 num_rqe;
27 __u32 pad;
28 __aligned_u64 sq_key;
29 __aligned_u64 rq_key;
30};
31
32struct siw_ureq_reg_mr {
33 __u8 stag_key;
34 __u8 reserved[3];
35 __u32 pad;
36};
37
38struct siw_uresp_reg_mr {
39 __u32 stag;
40 __u32 pad;
41};
42
43struct siw_uresp_create_srq {
44 __u32 num_rqe;
45 __u32 pad;
46 __aligned_u64 srq_key;
47};
48
49struct siw_uresp_alloc_ctx {
50 __u32 dev_id;
51 __u32 pad;
52};
53
54enum siw_opcode {
55 SIW_OP_WRITE,
56 SIW_OP_READ,
57 SIW_OP_READ_LOCAL_INV,
58 SIW_OP_SEND,
59 SIW_OP_SEND_WITH_IMM,
60 SIW_OP_SEND_REMOTE_INV,
61
62 /* Unsupported */
63 SIW_OP_FETCH_AND_ADD,
64 SIW_OP_COMP_AND_SWAP,
65
66 SIW_OP_RECEIVE,
67 /* provider internal SQE */
68 SIW_OP_READ_RESPONSE,
69 /*
70 * below opcodes valid for
71 * in-kernel clients only
72 */
73 SIW_OP_INVAL_STAG,
74 SIW_OP_REG_MR,
75 SIW_NUM_OPCODES
76};
77
78/* Keep it same as ibv_sge to allow for memcpy */
79struct siw_sge {
80 __aligned_u64 laddr;
81 __u32 length;
82 __u32 lkey;
83};
84
85/*
86 * Inline data are kept within the work request itself occupying
87 * the space of sge[1] .. sge[n]. Therefore, __inline__ data cannot be
88 * supported if SIW_MAX_SGE is below 2 elements.
89 */
90#define SIW_MAX_INLINE (sizeof(struct siw_sge) * (SIW_MAX_SGE - 1))
91
92#if SIW_MAX_SGE < 2
93#error "SIW_MAX_SGE must be at least 2"
94#endif
95
96enum siw_wqe_flags {
97 SIW_WQE_VALID = 1,
98 SIW_WQE_INLINE = (1 << 1),
99 SIW_WQE_SIGNALLED = (1 << 2),
100 SIW_WQE_SOLICITED = (1 << 3),
101 SIW_WQE_READ_FENCE = (1 << 4),
102 SIW_WQE_REM_INVAL = (1 << 5),
103 SIW_WQE_COMPLETED = (1 << 6)
104};
105
106/* Send Queue Element */
107struct siw_sqe {
108 __aligned_u64 id;
109 __u16 flags;
110 __u8 num_sge;
111 /* Contains enum siw_opcode values */
112 __u8 opcode;
113 __u32 rkey;
114 union {
115 __aligned_u64 raddr;
116 __aligned_u64 base_mr;
117 };
118 union {
119 struct siw_sge sge[SIW_MAX_SGE];
120 __aligned_u64 access;
121 };
122};
123
124/* Receive Queue Element */
125struct siw_rqe {
126 __aligned_u64 id;
127 __u16 flags;
128 __u8 num_sge;
129 /*
130 * only used by kernel driver,
131 * ignored if set by user
132 */
133 __u8 opcode;
134 __u32 unused;
135 struct siw_sge sge[SIW_MAX_SGE];
136};
137
138enum siw_notify_flags {
139 SIW_NOTIFY_NOT = (0),
140 SIW_NOTIFY_SOLICITED = (1 << 0),
141 SIW_NOTIFY_NEXT_COMPLETION = (1 << 1),
142 SIW_NOTIFY_MISSED_EVENTS = (1 << 2),
143 SIW_NOTIFY_ALL = SIW_NOTIFY_SOLICITED | SIW_NOTIFY_NEXT_COMPLETION |
144 SIW_NOTIFY_MISSED_EVENTS
145};
146
147enum siw_wc_status {
148 SIW_WC_SUCCESS,
149 SIW_WC_LOC_LEN_ERR,
150 SIW_WC_LOC_PROT_ERR,
151 SIW_WC_LOC_QP_OP_ERR,
152 SIW_WC_WR_FLUSH_ERR,
153 SIW_WC_BAD_RESP_ERR,
154 SIW_WC_LOC_ACCESS_ERR,
155 SIW_WC_REM_ACCESS_ERR,
156 SIW_WC_REM_INV_REQ_ERR,
157 SIW_WC_GENERAL_ERR,
158 SIW_NUM_WC_STATUS
159};
160
161struct siw_cqe {
162 __aligned_u64 id;
163 __u8 flags;
164 __u8 opcode;
165 __u16 status;
166 __u32 bytes;
167 union {
168 __aligned_u64 imm_data;
169 __u32 inval_stag;
170 };
171 /* QP number or QP pointer */
172 union {
173 struct ib_qp *base_qp;
174 __aligned_u64 qp_id;
175 };
176};
177
178/*
179 * Shared structure between user and kernel
180 * to control CQ arming.
181 */
182struct siw_cq_ctrl {
183 __u32 flags;
184 __u32 pad;
185};
186#endif