1 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
2 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */
3 
4 #ifndef NFP_BPF_FW_H
5 #define NFP_BPF_FW_H 1
6 
7 #include <linux/bitops.h>
8 #include <linux/types.h>
9 #include "../ccm.h"
10 
11 /* Kernel's enum bpf_reg_type is not uABI so people may change it breaking
12  * our FW ABI.  In that case we will do translation in the driver.
13  */
14 #define NFP_BPF_SCALAR_VALUE		1
15 #define NFP_BPF_MAP_VALUE		4
16 #define NFP_BPF_STACK			6
17 #define NFP_BPF_PACKET_DATA		8
18 
19 enum bpf_cap_tlv_type {
20 	NFP_BPF_CAP_TYPE_FUNC		= 1,
21 	NFP_BPF_CAP_TYPE_ADJUST_HEAD	= 2,
22 	NFP_BPF_CAP_TYPE_MAPS		= 3,
23 	NFP_BPF_CAP_TYPE_RANDOM		= 4,
24 	NFP_BPF_CAP_TYPE_QUEUE_SELECT	= 5,
25 	NFP_BPF_CAP_TYPE_ADJUST_TAIL	= 6,
26 	NFP_BPF_CAP_TYPE_ABI_VERSION	= 7,
27 	NFP_BPF_CAP_TYPE_CMSG_MULTI_ENT	= 8,
28 };
29 
30 struct nfp_bpf_cap_tlv_func {
31 	__le32 func_id;
32 	__le32 func_addr;
33 };
34 
35 struct nfp_bpf_cap_tlv_adjust_head {
36 	__le32 flags;
37 	__le32 off_min;
38 	__le32 off_max;
39 	__le32 guaranteed_sub;
40 	__le32 guaranteed_add;
41 };
42 
43 #define NFP_BPF_ADJUST_HEAD_NO_META	BIT(0)
44 
45 struct nfp_bpf_cap_tlv_maps {
46 	__le32 types;
47 	__le32 max_maps;
48 	__le32 max_elems;
49 	__le32 max_key_sz;
50 	__le32 max_val_sz;
51 	__le32 max_elem_sz;
52 };
53 
54 /*
55  * Types defined for map related control messages
56  */
57 
58 /* BPF ABIv2 fixed-length control message fields */
59 #define CMSG_MAP_KEY_LW			16
60 #define CMSG_MAP_VALUE_LW		16
61 
62 enum nfp_bpf_cmsg_status {
63 	CMSG_RC_SUCCESS			= 0,
64 	CMSG_RC_ERR_MAP_FD		= 1,
65 	CMSG_RC_ERR_MAP_NOENT		= 2,
66 	CMSG_RC_ERR_MAP_ERR		= 3,
67 	CMSG_RC_ERR_MAP_PARSE		= 4,
68 	CMSG_RC_ERR_MAP_EXIST		= 5,
69 	CMSG_RC_ERR_MAP_NOMEM		= 6,
70 	CMSG_RC_ERR_MAP_E2BIG		= 7,
71 };
72 
73 struct cmsg_reply_map_simple {
74 	struct nfp_ccm_hdr hdr;
75 	__be32 rc;
76 };
77 
78 struct cmsg_req_map_alloc_tbl {
79 	struct nfp_ccm_hdr hdr;
80 	__be32 key_size;		/* in bytes */
81 	__be32 value_size;		/* in bytes */
82 	__be32 max_entries;
83 	__be32 map_type;
84 	__be32 map_flags;		/* reserved */
85 };
86 
87 struct cmsg_reply_map_alloc_tbl {
88 	struct cmsg_reply_map_simple reply_hdr;
89 	__be32 tid;
90 };
91 
92 struct cmsg_req_map_free_tbl {
93 	struct nfp_ccm_hdr hdr;
94 	__be32 tid;
95 };
96 
97 struct cmsg_reply_map_free_tbl {
98 	struct cmsg_reply_map_simple reply_hdr;
99 	__be32 count;
100 };
101 
102 struct cmsg_req_map_op {
103 	struct nfp_ccm_hdr hdr;
104 	__be32 tid;
105 	__be32 count;
106 	__be32 flags;
107 	u8 data[];
108 };
109 
110 struct cmsg_reply_map_op {
111 	struct cmsg_reply_map_simple reply_hdr;
112 	__be32 count;
113 	__be32 resv;
114 	u8 data[];
115 };
116 
117 struct cmsg_bpf_event {
118 	struct nfp_ccm_hdr hdr;
119 	__be32 cpu_id;
120 	__be64 map_ptr;
121 	__be32 data_size;
122 	__be32 pkt_size;
123 	u8 data[];
124 };
125 #endif
126