LXR linux/drivers/net/ethernet/netronome/nfp/flower/main.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_FLOWER_H__
  35#define __NFP_FLOWER_H__ 1
  36
  37#include <linux/circ_buf.h>
  38#include <linux/hashtable.h>
  39#include <linux/time64.h>
  40#include <linux/types.h>
  41#include <net/pkt_cls.h>
  42#include <linux/workqueue.h>
  43
  44struct net_device;
  45struct nfp_app;
  46
  47#define NFP_FL_STATS_ENTRY_RS           BIT(20)
  48#define NFP_FL_STATS_ELEM_RS            4
  49#define NFP_FL_REPEATED_HASH_MAX        BIT(17)
  50#define NFP_FLOWER_HASH_BITS            19
  51#define NFP_FLOWER_MASK_ENTRY_RS        256
  52#define NFP_FLOWER_MASK_ELEMENT_RS      1
  53#define NFP_FLOWER_MASK_HASH_BITS       10
  54
  55#define NFP_FL_META_FLAG_NEW_MASK       128
  56#define NFP_FL_META_FLAG_LAST_MASK      1
  57
  58#define NFP_FL_MASK_REUSE_TIME_NS       40000
  59#define NFP_FL_MASK_ID_LOCATION         1
  60
  61struct nfp_fl_mask_id {
  62        struct circ_buf mask_id_free_list;
  63        struct timespec64 *last_used;
  64        u8 init_unallocated;
  65};
  66
  67struct nfp_fl_stats_id {
  68        struct circ_buf free_list;
  69        u32 init_unalloc;
  70        u8 repeated_em_count;
  71};
  72
  73/**
  74 * struct nfp_flower_priv - Flower APP per-vNIC priv data
  75 * @app:                Back pointer to app
  76 * @nn:                 Pointer to vNIC
  77 * @mask_id_seed:       Seed used for mask hash table
  78 * @flower_version:     HW version of flower
  79 * @stats_ids:          List of free stats ids
  80 * @mask_ids:           List of free mask ids
  81 * @mask_table:         Hash table used to store masks
  82 * @flow_table:         Hash table used to store flower rules
  83 * @cmsg_work:          Workqueue for control messages processing
  84 * @cmsg_skbs:          List of skbs for control message processing
  85 */
  86struct nfp_flower_priv {
  87        struct nfp_app *app;
  88        struct nfp_net *nn;
  89        u32 mask_id_seed;
  90        u64 flower_version;
  91        struct nfp_fl_stats_id stats_ids;
  92        struct nfp_fl_mask_id mask_ids;
  93        DECLARE_HASHTABLE(mask_table, NFP_FLOWER_MASK_HASH_BITS);
  94        DECLARE_HASHTABLE(flow_table, NFP_FLOWER_HASH_BITS);
  95        struct work_struct cmsg_work;
  96        struct sk_buff_head cmsg_skbs;
  97};
  98
  99struct nfp_fl_key_ls {
 100        u32 key_layer_two;
 101        u8 key_layer;
 102        int key_size;
 103};
 104
 105struct nfp_fl_rule_metadata {
 106        u8 key_len;
 107        u8 mask_len;
 108        u8 act_len;
 109        u8 flags;
 110        __be32 host_ctx_id;
 111        __be64 host_cookie __packed;
 112        __be64 flow_version __packed;
 113        __be32 shortcut;
 114};
 115
 116struct nfp_fl_stats {
 117        u64 pkts;
 118        u64 bytes;
 119        u64 used;
 120};
 121
 122struct nfp_fl_payload {
 123        struct nfp_fl_rule_metadata meta;
 124        unsigned long tc_flower_cookie;
 125        struct hlist_node link;
 126        struct rcu_head rcu;
 127        spinlock_t lock; /* lock stats */
 128        struct nfp_fl_stats stats;
 129        char *unmasked_data;
 130        char *mask_data;
 131        char *action_data;
 132};
 133
 134struct nfp_fl_stats_frame {
 135        __be32 stats_con_id;
 136        __be32 pkt_count;
 137        __be64 byte_count;
 138        __be64 stats_cookie;
 139};
 140
 141int nfp_flower_metadata_init(struct nfp_app *app);
 142void nfp_flower_metadata_cleanup(struct nfp_app *app);
 143
 144int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev,
 145                        enum tc_setup_type type, void *type_data);
 146int nfp_flower_compile_flow_match(struct tc_cls_flower_offload *flow,
 147                                  struct nfp_fl_key_ls *key_ls,
 148                                  struct net_device *netdev,
 149                                  struct nfp_fl_payload *nfp_flow);
 150int nfp_flower_compile_action(struct tc_cls_flower_offload *flow,
 151                              struct net_device *netdev,
 152                              struct nfp_fl_payload *nfp_flow);
 153int nfp_compile_flow_metadata(struct nfp_app *app,
 154                              struct tc_cls_flower_offload *flow,
 155                              struct nfp_fl_payload *nfp_flow);
 156int nfp_modify_flow_metadata(struct nfp_app *app,
 157                             struct nfp_fl_payload *nfp_flow);
 158
 159struct nfp_fl_payload *
 160nfp_flower_search_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie);
 161struct nfp_fl_payload *
 162nfp_flower_remove_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie);
 163
 164void nfp_flower_rx_flow_stats(struct nfp_app *app, struct sk_buff *skb);
 165
 166#endif
 167