LXR linux/drivers/net/ethernet/netronome/nfp/bpf/fw.h

   1/*
   2 * Copyright (C) 2017-2018 Netronome Systems, Inc.
   3 *
   4 * This software is dual licensed under the GNU General License Version 2,
   5 * June 1991 as shown in the file COPYING in the top-level directory of this
   6 * source tree or the BSD 2-Clause License provided below.  You have the
   7 * option to license this software under the complete terms of either license.
   8 *
   9 * The BSD 2-Clause License:
  10 *
  11 *     Redistribution and use in source and binary forms, with or
  12 *     without modification, are permitted provided that the following
  13 *     conditions are met:
  14 *
  15 *      1. Redistributions of source code must retain the above
  16 *         copyright notice, this list of conditions and the following
  17 *         disclaimer.
  18 *
  19 *      2. Redistributions in binary form must reproduce the above
  20 *         copyright notice, this list of conditions and the following
  21 *         disclaimer in the documentation and/or other materials
  22 *         provided with the distribution.
  23 *
  24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31 * SOFTWARE.
  32 */
  33
  34#ifndef NFP_BPF_FW_H
  35#define NFP_BPF_FW_H 1
  36
  37#include <linux/bitops.h>
  38#include <linux/types.h>
  39
  40/* Kernel's enum bpf_reg_type is not uABI so people may change it breaking
  41 * our FW ABI.  In that case we will do translation in the driver.
  42 */
  43#define NFP_BPF_SCALAR_VALUE            1
  44#define NFP_BPF_MAP_VALUE               4
  45#define NFP_BPF_STACK                   6
  46#define NFP_BPF_PACKET_DATA             8
  47
  48enum bpf_cap_tlv_type {
  49        NFP_BPF_CAP_TYPE_FUNC           = 1,
  50        NFP_BPF_CAP_TYPE_ADJUST_HEAD    = 2,
  51        NFP_BPF_CAP_TYPE_MAPS           = 3,
  52        NFP_BPF_CAP_TYPE_RANDOM         = 4,
  53        NFP_BPF_CAP_TYPE_QUEUE_SELECT   = 5,
  54        NFP_BPF_CAP_TYPE_ADJUST_TAIL    = 6,
  55};
  56
  57struct nfp_bpf_cap_tlv_func {
  58        __le32 func_id;
  59        __le32 func_addr;
  60};
  61
  62struct nfp_bpf_cap_tlv_adjust_head {
  63        __le32 flags;
  64        __le32 off_min;
  65        __le32 off_max;
  66        __le32 guaranteed_sub;
  67        __le32 guaranteed_add;
  68};
  69
  70#define NFP_BPF_ADJUST_HEAD_NO_META     BIT(0)
  71
  72struct nfp_bpf_cap_tlv_maps {
  73        __le32 types;
  74        __le32 max_maps;
  75        __le32 max_elems;
  76        __le32 max_key_sz;
  77        __le32 max_val_sz;
  78        __le32 max_elem_sz;
  79};
  80
  81/*
  82 * Types defined for map related control messages
  83 */
  84#define CMSG_MAP_ABI_VERSION            1
  85
  86enum nfp_bpf_cmsg_type {
  87        CMSG_TYPE_MAP_ALLOC     = 1,
  88        CMSG_TYPE_MAP_FREE      = 2,
  89        CMSG_TYPE_MAP_LOOKUP    = 3,
  90        CMSG_TYPE_MAP_UPDATE    = 4,
  91        CMSG_TYPE_MAP_DELETE    = 5,
  92        CMSG_TYPE_MAP_GETNEXT   = 6,
  93        CMSG_TYPE_MAP_GETFIRST  = 7,
  94        CMSG_TYPE_BPF_EVENT     = 8,
  95        __CMSG_TYPE_MAP_MAX,
  96};
  97
  98#define CMSG_TYPE_MAP_REPLY_BIT         7
  99#define __CMSG_REPLY(req)               (BIT(CMSG_TYPE_MAP_REPLY_BIT) | (req))
 100
 101#define CMSG_MAP_KEY_LW                 16
 102#define CMSG_MAP_VALUE_LW               16
 103
 104enum nfp_bpf_cmsg_status {
 105        CMSG_RC_SUCCESS                 = 0,
 106        CMSG_RC_ERR_MAP_FD              = 1,
 107        CMSG_RC_ERR_MAP_NOENT           = 2,
 108        CMSG_RC_ERR_MAP_ERR             = 3,
 109        CMSG_RC_ERR_MAP_PARSE           = 4,
 110        CMSG_RC_ERR_MAP_EXIST           = 5,
 111        CMSG_RC_ERR_MAP_NOMEM           = 6,
 112        CMSG_RC_ERR_MAP_E2BIG           = 7,
 113};
 114
 115struct cmsg_hdr {
 116        u8 type;
 117        u8 ver;
 118        __be16 tag;
 119};
 120
 121struct cmsg_reply_map_simple {
 122        struct cmsg_hdr hdr;
 123        __be32 rc;
 124};
 125
 126struct cmsg_req_map_alloc_tbl {
 127        struct cmsg_hdr hdr;
 128        __be32 key_size;                /* in bytes */
 129        __be32 value_size;              /* in bytes */
 130        __be32 max_entries;
 131        __be32 map_type;
 132        __be32 map_flags;               /* reserved */
 133};
 134
 135struct cmsg_reply_map_alloc_tbl {
 136        struct cmsg_reply_map_simple reply_hdr;
 137        __be32 tid;
 138};
 139
 140struct cmsg_req_map_free_tbl {
 141        struct cmsg_hdr hdr;
 142        __be32 tid;
 143};
 144
 145struct cmsg_reply_map_free_tbl {
 146        struct cmsg_reply_map_simple reply_hdr;
 147        __be32 count;
 148};
 149
 150struct cmsg_key_value_pair {
 151        __be32 key[CMSG_MAP_KEY_LW];
 152        __be32 value[CMSG_MAP_VALUE_LW];
 153};
 154
 155struct cmsg_req_map_op {
 156        struct cmsg_hdr hdr;
 157        __be32 tid;
 158        __be32 count;
 159        __be32 flags;
 160        struct cmsg_key_value_pair elem[0];
 161};
 162
 163struct cmsg_reply_map_op {
 164        struct cmsg_reply_map_simple reply_hdr;
 165        __be32 count;
 166        __be32 resv;
 167        struct cmsg_key_value_pair elem[0];
 168};
 169
 170struct cmsg_bpf_event {
 171        struct cmsg_hdr hdr;
 172        __be32 cpu_id;
 173        __be64 map_ptr;
 174        __be32 data_size;
 175        __be32 pkt_size;
 176        u8 data[0];
 177};
 178#endif
 179