nfp/bpf/fw.h

0001 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
0002 /* Copyright (C) 2017-2018 Netronome Systems, Inc. */
0003
0004 #ifndef NFP_BPF_FW_H
0005 #define NFP_BPF_FW_H 1
0006
0007 #include <linux/bitops.h>
0008 #include <linux/types.h>
0009 #include "../ccm.h"
0010
0011 /* Kernel's enum bpf_reg_type is not uABI so people may change it breaking
0012  * our FW ABI.  In that case we will do translation in the driver.
0013  */
0014 #define NFP_BPF_SCALAR_VALUE        1
0015 #define NFP_BPF_MAP_VALUE       4
0016 #define NFP_BPF_STACK           6
0017 #define NFP_BPF_PACKET_DATA     8
0018
0019 enum bpf_cap_tlv_type {
0020     NFP_BPF_CAP_TYPE_FUNC       = 1,
0021     NFP_BPF_CAP_TYPE_ADJUST_HEAD    = 2,
0022     NFP_BPF_CAP_TYPE_MAPS       = 3,
0023     NFP_BPF_CAP_TYPE_RANDOM     = 4,
0024     NFP_BPF_CAP_TYPE_QUEUE_SELECT   = 5,
0025     NFP_BPF_CAP_TYPE_ADJUST_TAIL    = 6,
0026     NFP_BPF_CAP_TYPE_ABI_VERSION    = 7,
0027     NFP_BPF_CAP_TYPE_CMSG_MULTI_ENT = 8,
0028 };
0029
0030 struct nfp_bpf_cap_tlv_func {
0031     __le32 func_id;
0032     __le32 func_addr;
0033 };
0034
0035 struct nfp_bpf_cap_tlv_adjust_head {
0036     __le32 flags;
0037     __le32 off_min;
0038     __le32 off_max;
0039     __le32 guaranteed_sub;
0040     __le32 guaranteed_add;
0041 };
0042
0043 #define NFP_BPF_ADJUST_HEAD_NO_META BIT(0)
0044
0045 struct nfp_bpf_cap_tlv_maps {
0046     __le32 types;
0047     __le32 max_maps;
0048     __le32 max_elems;
0049     __le32 max_key_sz;
0050     __le32 max_val_sz;
0051     __le32 max_elem_sz;
0052 };
0053
0054 /*
0055  * Types defined for map related control messages
0056  */
0057
0058 /* BPF ABIv2 fixed-length control message fields */
0059 #define CMSG_MAP_KEY_LW         16
0060 #define CMSG_MAP_VALUE_LW       16
0061
0062 enum nfp_bpf_cmsg_status {
0063     CMSG_RC_SUCCESS         = 0,
0064     CMSG_RC_ERR_MAP_FD      = 1,
0065     CMSG_RC_ERR_MAP_NOENT       = 2,
0066     CMSG_RC_ERR_MAP_ERR     = 3,
0067     CMSG_RC_ERR_MAP_PARSE       = 4,
0068     CMSG_RC_ERR_MAP_EXIST       = 5,
0069     CMSG_RC_ERR_MAP_NOMEM       = 6,
0070     CMSG_RC_ERR_MAP_E2BIG       = 7,
0071 };
0072
0073 struct cmsg_reply_map_simple {
0074     struct nfp_ccm_hdr hdr;
0075     __be32 rc;
0076 };
0077
0078 struct cmsg_req_map_alloc_tbl {
0079     struct nfp_ccm_hdr hdr;
0080     __be32 key_size;        /* in bytes */
0081     __be32 value_size;      /* in bytes */
0082     __be32 max_entries;
0083     __be32 map_type;
0084     __be32 map_flags;       /* reserved */
0085 };
0086
0087 struct cmsg_reply_map_alloc_tbl {
0088     struct cmsg_reply_map_simple reply_hdr;
0089     __be32 tid;
0090 };
0091
0092 struct cmsg_req_map_free_tbl {
0093     struct nfp_ccm_hdr hdr;
0094     __be32 tid;
0095 };
0096
0097 struct cmsg_reply_map_free_tbl {
0098     struct cmsg_reply_map_simple reply_hdr;
0099     __be32 count;
0100 };
0101
0102 struct cmsg_req_map_op {
0103     struct nfp_ccm_hdr hdr;
0104     __be32 tid;
0105     __be32 count;
0106     __be32 flags;
0107     u8 data[];
0108 };
0109
0110 struct cmsg_reply_map_op {
0111     struct cmsg_reply_map_simple reply_hdr;
0112     __be32 count;
0113     __be32 resv;
0114     u8 data[];
0115 };
0116
0117 struct cmsg_bpf_event {
0118     struct nfp_ccm_hdr hdr;
0119     __be32 cpu_id;
0120     __be64 map_ptr;
0121     __be32 data_size;
0122     __be32 pkt_size;
0123     u8 data[];
0124 };
0125 #endif