/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
/* Copyright (C) 2017-2018 Netronome Systems, Inc. */

#ifndef NFP_BPF_FW_H
#define NFP_BPF_FW_H 1

#include <linux/bitops.h>
#include <linux/types.h>
#include "../ccm.h"

/* Kernel's enum bpf_reg_type is not uABI so people may change it breaking
 * our FW ABI.  In that case we will do translation in the driver.
 */
#define NFP_BPF_SCALAR_VALUE            1
#define NFP_BPF_MAP_VALUE               4
#define NFP_BPF_STACK                   6
#define NFP_BPF_PACKET_DATA             8

enum bpf_cap_tlv_type {
        NFP_BPF_CAP_TYPE_FUNC           = 1,
        NFP_BPF_CAP_TYPE_ADJUST_HEAD    = 2,
        NFP_BPF_CAP_TYPE_MAPS           = 3,
        NFP_BPF_CAP_TYPE_RANDOM         = 4,
        NFP_BPF_CAP_TYPE_QUEUE_SELECT   = 5,
        NFP_BPF_CAP_TYPE_ADJUST_TAIL    = 6,
        NFP_BPF_CAP_TYPE_ABI_VERSION    = 7,
        NFP_BPF_CAP_TYPE_CMSG_MULTI_ENT = 8,
};

struct nfp_bpf_cap_tlv_func {
        __le32 func_id;
        __le32 func_addr;
};

struct nfp_bpf_cap_tlv_adjust_head {
        __le32 flags;
        __le32 off_min;
        __le32 off_max;
        __le32 guaranteed_sub;
        __le32 guaranteed_add;
};

#define NFP_BPF_ADJUST_HEAD_NO_META     BIT(0)

struct nfp_bpf_cap_tlv_maps {
        __le32 types;
        __le32 max_maps;
        __le32 max_elems;
        __le32 max_key_sz;
        __le32 max_val_sz;
        __le32 max_elem_sz;
};

/*
 * Types defined for map related control messages
 */

/* BPF ABIv2 fixed-length control message fields */
#define CMSG_MAP_KEY_LW                 16
#define CMSG_MAP_VALUE_LW               16

enum nfp_bpf_cmsg_status {
        CMSG_RC_SUCCESS                 = 0,
        CMSG_RC_ERR_MAP_FD              = 1,
        CMSG_RC_ERR_MAP_NOENT           = 2,
        CMSG_RC_ERR_MAP_ERR             = 3,
        CMSG_RC_ERR_MAP_PARSE           = 4,
        CMSG_RC_ERR_MAP_EXIST           = 5,
        CMSG_RC_ERR_MAP_NOMEM           = 6,
        CMSG_RC_ERR_MAP_E2BIG           = 7,
};

struct cmsg_reply_map_simple {
        struct nfp_ccm_hdr hdr;
        __be32 rc;
};

struct cmsg_req_map_alloc_tbl {
        struct nfp_ccm_hdr hdr;
        __be32 key_size;                /* in bytes */
        __be32 value_size;              /* in bytes */
        __be32 max_entries;
        __be32 map_type;
        __be32 map_flags;               /* reserved */
};

struct cmsg_reply_map_alloc_tbl {
        struct cmsg_reply_map_simple reply_hdr;
        __be32 tid;
};

struct cmsg_req_map_free_tbl {
        struct nfp_ccm_hdr hdr;
        __be32 tid;
};

struct cmsg_reply_map_free_tbl {
        struct cmsg_reply_map_simple reply_hdr;
        __be32 count;
};

struct cmsg_req_map_op {
        struct nfp_ccm_hdr hdr;
        __be32 tid;
        __be32 count;
        __be32 flags;
        u8 data[];
};

struct cmsg_reply_map_op {
        struct cmsg_reply_map_simple reply_hdr;
        __be32 count;
        __be32 resv;
        u8 data[];
};

struct cmsg_bpf_event {
        struct nfp_ccm_hdr hdr;
        __be32 cpu_id;
        __be64 map_ptr;
        __be32 data_size;
        __be32 pkt_size;
        u8 data[];
};
#endif