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

   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