xref: /openbmc/linux/include/uapi/rdma/efa-abi.h (revision 531094dc)
1 /* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) */
2 /*
3  * Copyright 2018-2023 Amazon.com, Inc. or its affiliates. All rights reserved.
4  */
5 
6 #ifndef EFA_ABI_USER_H
7 #define EFA_ABI_USER_H
8 
9 #include <linux/types.h>
10 
11 /*
12  * Increment this value if any changes that break userspace ABI
13  * compatibility are made.
14  */
15 #define EFA_UVERBS_ABI_VERSION 1
16 
17 /*
18  * Keep structs aligned to 8 bytes.
19  * Keep reserved fields as arrays of __u8 named reserved_XXX where XXX is the
20  * hex bit offset of the field.
21  */
22 
23 enum {
24 	EFA_ALLOC_UCONTEXT_CMD_COMP_TX_BATCH  = 1 << 0,
25 	EFA_ALLOC_UCONTEXT_CMD_COMP_MIN_SQ_WR = 1 << 1,
26 };
27 
28 struct efa_ibv_alloc_ucontext_cmd {
29 	__u32 comp_mask;
30 	__u8 reserved_20[4];
31 };
32 
33 enum efa_ibv_user_cmds_supp_udata {
34 	EFA_USER_CMDS_SUPP_UDATA_QUERY_DEVICE = 1 << 0,
35 	EFA_USER_CMDS_SUPP_UDATA_CREATE_AH    = 1 << 1,
36 };
37 
38 struct efa_ibv_alloc_ucontext_resp {
39 	__u32 comp_mask;
40 	__u32 cmds_supp_udata_mask;
41 	__u16 sub_cqs_per_cq;
42 	__u16 inline_buf_size;
43 	__u32 max_llq_size; /* bytes */
44 	__u16 max_tx_batch; /* units of 64 bytes */
45 	__u16 min_sq_wr;
46 	__u8 reserved_a0[4];
47 };
48 
49 struct efa_ibv_alloc_pd_resp {
50 	__u32 comp_mask;
51 	__u16 pdn;
52 	__u8 reserved_30[2];
53 };
54 
55 enum {
56 	EFA_CREATE_CQ_WITH_COMPLETION_CHANNEL = 1 << 0,
57 	EFA_CREATE_CQ_WITH_SGID               = 1 << 1,
58 };
59 
60 struct efa_ibv_create_cq {
61 	__u32 comp_mask;
62 	__u32 cq_entry_size;
63 	__u16 num_sub_cqs;
64 	__u8 flags;
65 	__u8 reserved_58[5];
66 };
67 
68 enum {
69 	EFA_CREATE_CQ_RESP_DB_OFF = 1 << 0,
70 };
71 
72 struct efa_ibv_create_cq_resp {
73 	__u32 comp_mask;
74 	__u8 reserved_20[4];
75 	__aligned_u64 q_mmap_key;
76 	__aligned_u64 q_mmap_size;
77 	__u16 cq_idx;
78 	__u8 reserved_d0[2];
79 	__u32 db_off;
80 	__aligned_u64 db_mmap_key;
81 };
82 
83 enum {
84 	EFA_QP_DRIVER_TYPE_SRD = 0,
85 };
86 
87 struct efa_ibv_create_qp {
88 	__u32 comp_mask;
89 	__u32 rq_ring_size; /* bytes */
90 	__u32 sq_ring_size; /* bytes */
91 	__u32 driver_qp_type;
92 };
93 
94 struct efa_ibv_create_qp_resp {
95 	__u32 comp_mask;
96 	/* the offset inside the page of the rq db */
97 	__u32 rq_db_offset;
98 	/* the offset inside the page of the sq db */
99 	__u32 sq_db_offset;
100 	/* the offset inside the page of descriptors buffer */
101 	__u32 llq_desc_offset;
102 	__aligned_u64 rq_mmap_key;
103 	__aligned_u64 rq_mmap_size;
104 	__aligned_u64 rq_db_mmap_key;
105 	__aligned_u64 sq_db_mmap_key;
106 	__aligned_u64 llq_desc_mmap_key;
107 	__u16 send_sub_cq_idx;
108 	__u16 recv_sub_cq_idx;
109 	__u8 reserved_1e0[4];
110 };
111 
112 struct efa_ibv_create_ah_resp {
113 	__u32 comp_mask;
114 	__u16 efa_address_handle;
115 	__u8 reserved_30[2];
116 };
117 
118 enum {
119 	EFA_QUERY_DEVICE_CAPS_RDMA_READ = 1 << 0,
120 	EFA_QUERY_DEVICE_CAPS_RNR_RETRY = 1 << 1,
121 	EFA_QUERY_DEVICE_CAPS_CQ_NOTIFICATIONS = 1 << 2,
122 	EFA_QUERY_DEVICE_CAPS_CQ_WITH_SGID     = 1 << 3,
123 	EFA_QUERY_DEVICE_CAPS_DATA_POLLING_128 = 1 << 4,
124 	EFA_QUERY_DEVICE_CAPS_RDMA_WRITE = 1 << 5,
125 };
126 
127 struct efa_ibv_ex_query_device_resp {
128 	__u32 comp_mask;
129 	__u32 max_sq_wr;
130 	__u32 max_rq_wr;
131 	__u16 max_sq_sge;
132 	__u16 max_rq_sge;
133 	__u32 max_rdma_size;
134 	__u32 device_caps;
135 };
136 
137 #endif /* EFA_ABI_USER_H */
138