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 44 struct net_device; 45 struct 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 61 #define NFP_FL_VXLAN_PORT 4789 62 63 struct nfp_fl_mask_id { 64 struct circ_buf mask_id_free_list; 65 struct timespec64 *last_used; 66 u8 init_unallocated; 67 }; 68 69 struct nfp_fl_stats_id { 70 struct circ_buf free_list; 71 u32 init_unalloc; 72 u8 repeated_em_count; 73 }; 74 75 /** 76 * struct nfp_flower_priv - Flower APP per-vNIC priv data 77 * @app: Back pointer to app 78 * @nn: Pointer to vNIC 79 * @mask_id_seed: Seed used for mask hash table 80 * @flower_version: HW version of flower 81 * @stats_ids: List of free stats ids 82 * @mask_ids: List of free mask ids 83 * @mask_table: Hash table used to store masks 84 * @flow_table: Hash table used to store flower rules 85 * @cmsg_work: Workqueue for control messages processing 86 * @cmsg_skbs: List of skbs for control message processing 87 * @nfp_mac_off_list: List of MAC addresses to offload 88 * @nfp_mac_index_list: List of unique 8-bit indexes for non NFP netdevs 89 * @nfp_ipv4_off_list: List of IPv4 addresses to offload 90 * @nfp_neigh_off_list: List of neighbour offloads 91 * @nfp_mac_off_lock: Lock for the MAC address list 92 * @nfp_mac_index_lock: Lock for the MAC index list 93 * @nfp_ipv4_off_lock: Lock for the IPv4 address list 94 * @nfp_neigh_off_lock: Lock for the neighbour address list 95 * @nfp_mac_off_ids: IDA to manage id assignment for offloaded macs 96 * @nfp_mac_off_count: Number of MACs in address list 97 * @nfp_tun_mac_nb: Notifier to monitor link state 98 * @nfp_tun_neigh_nb: Notifier to monitor neighbour state 99 */ 100 struct nfp_flower_priv { 101 struct nfp_app *app; 102 struct nfp_net *nn; 103 u32 mask_id_seed; 104 u64 flower_version; 105 struct nfp_fl_stats_id stats_ids; 106 struct nfp_fl_mask_id mask_ids; 107 DECLARE_HASHTABLE(mask_table, NFP_FLOWER_MASK_HASH_BITS); 108 DECLARE_HASHTABLE(flow_table, NFP_FLOWER_HASH_BITS); 109 struct work_struct cmsg_work; 110 struct sk_buff_head cmsg_skbs; 111 struct list_head nfp_mac_off_list; 112 struct list_head nfp_mac_index_list; 113 struct list_head nfp_ipv4_off_list; 114 struct list_head nfp_neigh_off_list; 115 struct mutex nfp_mac_off_lock; 116 struct mutex nfp_mac_index_lock; 117 struct mutex nfp_ipv4_off_lock; 118 struct mutex nfp_neigh_off_lock; 119 struct ida nfp_mac_off_ids; 120 int nfp_mac_off_count; 121 struct notifier_block nfp_tun_mac_nb; 122 struct notifier_block nfp_tun_neigh_nb; 123 }; 124 125 struct nfp_fl_key_ls { 126 u32 key_layer_two; 127 u8 key_layer; 128 int key_size; 129 }; 130 131 struct nfp_fl_rule_metadata { 132 u8 key_len; 133 u8 mask_len; 134 u8 act_len; 135 u8 flags; 136 __be32 host_ctx_id; 137 __be64 host_cookie __packed; 138 __be64 flow_version __packed; 139 __be32 shortcut; 140 }; 141 142 struct nfp_fl_stats { 143 u64 pkts; 144 u64 bytes; 145 u64 used; 146 }; 147 148 struct nfp_fl_payload { 149 struct nfp_fl_rule_metadata meta; 150 unsigned long tc_flower_cookie; 151 struct hlist_node link; 152 struct rcu_head rcu; 153 spinlock_t lock; /* lock stats */ 154 struct nfp_fl_stats stats; 155 __be32 nfp_tun_ipv4_addr; 156 char *unmasked_data; 157 char *mask_data; 158 char *action_data; 159 }; 160 161 struct nfp_fl_stats_frame { 162 __be32 stats_con_id; 163 __be32 pkt_count; 164 __be64 byte_count; 165 __be64 stats_cookie; 166 }; 167 168 int nfp_flower_metadata_init(struct nfp_app *app); 169 void nfp_flower_metadata_cleanup(struct nfp_app *app); 170 171 int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev, 172 enum tc_setup_type type, void *type_data); 173 int nfp_flower_compile_flow_match(struct tc_cls_flower_offload *flow, 174 struct nfp_fl_key_ls *key_ls, 175 struct net_device *netdev, 176 struct nfp_fl_payload *nfp_flow); 177 int nfp_flower_compile_action(struct tc_cls_flower_offload *flow, 178 struct net_device *netdev, 179 struct nfp_fl_payload *nfp_flow); 180 int nfp_compile_flow_metadata(struct nfp_app *app, 181 struct tc_cls_flower_offload *flow, 182 struct nfp_fl_payload *nfp_flow); 183 int nfp_modify_flow_metadata(struct nfp_app *app, 184 struct nfp_fl_payload *nfp_flow); 185 186 struct nfp_fl_payload * 187 nfp_flower_search_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie); 188 struct nfp_fl_payload * 189 nfp_flower_remove_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie); 190 191 void nfp_flower_rx_flow_stats(struct nfp_app *app, struct sk_buff *skb); 192 193 int nfp_tunnel_config_start(struct nfp_app *app); 194 void nfp_tunnel_config_stop(struct nfp_app *app); 195 void nfp_tunnel_write_macs(struct nfp_app *app); 196 void nfp_tunnel_del_ipv4_off(struct nfp_app *app, __be32 ipv4); 197 void nfp_tunnel_add_ipv4_off(struct nfp_app *app, __be32 ipv4); 198 void nfp_tunnel_request_route(struct nfp_app *app, struct sk_buff *skb); 199 void nfp_tunnel_keep_alive(struct nfp_app *app, struct sk_buff *skb); 200 201 #endif 202