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

   1 /*
   2  * Copyright (C) 2017 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 enum bpf_cap_tlv_type {
  41         NFP_BPF_CAP_TYPE_FUNC           = 1,
  42         NFP_BPF_CAP_TYPE_ADJUST_HEAD    = 2,
  43         NFP_BPF_CAP_TYPE_MAPS           = 3,
  44 };
  45
  46 struct nfp_bpf_cap_tlv_func {
  47         __le32 func_id;
  48         __le32 func_addr;
  49 };
  50
  51 struct nfp_bpf_cap_tlv_adjust_head {
  52         __le32 flags;
  53         __le32 off_min;
  54         __le32 off_max;
  55         __le32 guaranteed_sub;
  56         __le32 guaranteed_add;
  57 };
  58
  59 #define NFP_BPF_ADJUST_HEAD_NO_META     BIT(0)
  60
  61 struct nfp_bpf_cap_tlv_maps {
  62         __le32 types;
  63         __le32 max_maps;
  64         __le32 max_elems;
  65         __le32 max_key_sz;
  66         __le32 max_val_sz;
  67         __le32 max_elem_sz;
  68 };
  69
  70 /*
  71  * Types defined for map related control messages
  72  */
  73 #define CMSG_MAP_ABI_VERSION            1
  74
  75 enum nfp_bpf_cmsg_type {
  76         CMSG_TYPE_MAP_ALLOC     = 1,
  77         CMSG_TYPE_MAP_FREE      = 2,
  78         CMSG_TYPE_MAP_LOOKUP    = 3,
  79         CMSG_TYPE_MAP_UPDATE    = 4,
  80         CMSG_TYPE_MAP_DELETE    = 5,
  81         CMSG_TYPE_MAP_GETNEXT   = 6,
  82         CMSG_TYPE_MAP_GETFIRST  = 7,
  83         __CMSG_TYPE_MAP_MAX,
  84 };
  85
  86 #define CMSG_TYPE_MAP_REPLY_BIT         7
  87 #define __CMSG_REPLY(req)               (BIT(CMSG_TYPE_MAP_REPLY_BIT) | (req))
  88
  89 #define CMSG_MAP_KEY_LW                 16
  90 #define CMSG_MAP_VALUE_LW               16
  91
  92 enum nfp_bpf_cmsg_status {
  93         CMSG_RC_SUCCESS                 = 0,
  94         CMSG_RC_ERR_MAP_FD              = 1,
  95         CMSG_RC_ERR_MAP_NOENT           = 2,
  96         CMSG_RC_ERR_MAP_ERR             = 3,
  97         CMSG_RC_ERR_MAP_PARSE           = 4,
  98         CMSG_RC_ERR_MAP_EXIST           = 5,
  99         CMSG_RC_ERR_MAP_NOMEM           = 6,
 100         CMSG_RC_ERR_MAP_E2BIG           = 7,
 101 };
 102
 103 struct cmsg_hdr {
 104         u8 type;
 105         u8 ver;
 106         __be16 tag;
 107 };
 108
 109 struct cmsg_reply_map_simple {
 110         struct cmsg_hdr hdr;
 111         __be32 rc;
 112 };
 113
 114 struct cmsg_req_map_alloc_tbl {
 115         struct cmsg_hdr hdr;
 116         __be32 key_size;                /* in bytes */
 117         __be32 value_size;              /* in bytes */
 118         __be32 max_entries;
 119         __be32 map_type;
 120         __be32 map_flags;               /* reserved */
 121 };
 122
 123 struct cmsg_reply_map_alloc_tbl {
 124         struct cmsg_reply_map_simple reply_hdr;
 125         __be32 tid;
 126 };
 127
 128 struct cmsg_req_map_free_tbl {
 129         struct cmsg_hdr hdr;
 130         __be32 tid;
 131 };
 132
 133 struct cmsg_reply_map_free_tbl {
 134         struct cmsg_reply_map_simple reply_hdr;
 135         __be32 count;
 136 };
 137
 138 struct cmsg_key_value_pair {
 139         __be32 key[CMSG_MAP_KEY_LW];
 140         __be32 value[CMSG_MAP_VALUE_LW];
 141 };
 142
 143 struct cmsg_req_map_op {
 144         struct cmsg_hdr hdr;
 145         __be32 tid;
 146         __be32 count;
 147         __be32 flags;
 148         struct cmsg_key_value_pair elem[0];
 149 };
 150
 151 struct cmsg_reply_map_op {
 152         struct cmsg_reply_map_simple reply_hdr;
 153         __be32 count;
 154         __be32 resv;
 155         struct cmsg_key_value_pair elem[0];
 156 };
 157 #endif