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 "cmsg.h" 38 39 #include <linux/circ_buf.h> 40 #include <linux/hashtable.h> 41 #include <linux/time64.h> 42 #include <linux/types.h> 43 #include <net/pkt_cls.h> 44 #include <linux/workqueue.h> 45 46 struct net_device; 47 struct nfp_app; 48 49 #define NFP_FL_STATS_ENTRY_RS BIT(20) 50 #define NFP_FL_STATS_ELEM_RS 4 51 #define NFP_FL_REPEATED_HASH_MAX BIT(17) 52 #define NFP_FLOWER_HASH_BITS 19 53 #define NFP_FLOWER_MASK_ENTRY_RS 256 54 #define NFP_FLOWER_MASK_ELEMENT_RS 1 55 #define NFP_FLOWER_MASK_HASH_BITS 10 56 57 #define NFP_FL_META_FLAG_MANAGE_MASK BIT(7) 58 59 #define NFP_FL_MASK_REUSE_TIME_NS 40000 60 #define NFP_FL_MASK_ID_LOCATION 1 61 62 #define NFP_FL_VXLAN_PORT 4789 63 #define NFP_FL_GENEVE_PORT 6081 64 65 /* Extra features bitmap. */ 66 #define NFP_FL_FEATS_GENEVE BIT(0) 67 68 struct nfp_fl_mask_id { 69 struct circ_buf mask_id_free_list; 70 struct timespec64 *last_used; 71 u8 init_unallocated; 72 }; 73 74 struct nfp_fl_stats_id { 75 struct circ_buf free_list; 76 u32 init_unalloc; 77 u8 repeated_em_count; 78 }; 79 80 /** 81 * struct nfp_flower_priv - Flower APP per-vNIC priv data 82 * @app: Back pointer to app 83 * @nn: Pointer to vNIC 84 * @mask_id_seed: Seed used for mask hash table 85 * @flower_version: HW version of flower 86 * @flower_ext_feats: Bitmap of extra features the HW supports 87 * @stats_ids: List of free stats ids 88 * @mask_ids: List of free mask ids 89 * @mask_table: Hash table used to store masks 90 * @flow_table: Hash table used to store flower rules 91 * @cmsg_work: Workqueue for control messages processing 92 * @cmsg_skbs: List of skbs for control message processing 93 * @nfp_mac_off_list: List of MAC addresses to offload 94 * @nfp_mac_index_list: List of unique 8-bit indexes for non NFP netdevs 95 * @nfp_ipv4_off_list: List of IPv4 addresses to offload 96 * @nfp_neigh_off_list: List of neighbour offloads 97 * @nfp_mac_off_lock: Lock for the MAC address list 98 * @nfp_mac_index_lock: Lock for the MAC index list 99 * @nfp_ipv4_off_lock: Lock for the IPv4 address list 100 * @nfp_neigh_off_lock: Lock for the neighbour address list 101 * @nfp_mac_off_ids: IDA to manage id assignment for offloaded macs 102 * @nfp_mac_off_count: Number of MACs in address list 103 * @nfp_tun_mac_nb: Notifier to monitor link state 104 * @nfp_tun_neigh_nb: Notifier to monitor neighbour state 105 */ 106 struct nfp_flower_priv { 107 struct nfp_app *app; 108 struct nfp_net *nn; 109 u32 mask_id_seed; 110 u64 flower_version; 111 u64 flower_ext_feats; 112 struct nfp_fl_stats_id stats_ids; 113 struct nfp_fl_mask_id mask_ids; 114 DECLARE_HASHTABLE(mask_table, NFP_FLOWER_MASK_HASH_BITS); 115 DECLARE_HASHTABLE(flow_table, NFP_FLOWER_HASH_BITS); 116 struct work_struct cmsg_work; 117 struct sk_buff_head cmsg_skbs; 118 struct list_head nfp_mac_off_list; 119 struct list_head nfp_mac_index_list; 120 struct list_head nfp_ipv4_off_list; 121 struct list_head nfp_neigh_off_list; 122 struct mutex nfp_mac_off_lock; 123 struct mutex nfp_mac_index_lock; 124 struct mutex nfp_ipv4_off_lock; 125 spinlock_t nfp_neigh_off_lock; 126 struct ida nfp_mac_off_ids; 127 int nfp_mac_off_count; 128 struct notifier_block nfp_tun_mac_nb; 129 struct notifier_block nfp_tun_neigh_nb; 130 }; 131 132 struct nfp_fl_key_ls { 133 u32 key_layer_two; 134 u8 key_layer; 135 int key_size; 136 }; 137 138 struct nfp_fl_rule_metadata { 139 u8 key_len; 140 u8 mask_len; 141 u8 act_len; 142 u8 flags; 143 __be32 host_ctx_id; 144 __be64 host_cookie __packed; 145 __be64 flow_version __packed; 146 __be32 shortcut; 147 }; 148 149 struct nfp_fl_stats { 150 u64 pkts; 151 u64 bytes; 152 u64 used; 153 }; 154 155 struct nfp_fl_payload { 156 struct nfp_fl_rule_metadata meta; 157 unsigned long tc_flower_cookie; 158 struct hlist_node link; 159 struct rcu_head rcu; 160 spinlock_t lock; /* lock stats */ 161 struct nfp_fl_stats stats; 162 __be32 nfp_tun_ipv4_addr; 163 char *unmasked_data; 164 char *mask_data; 165 char *action_data; 166 }; 167 168 struct nfp_fl_stats_frame { 169 __be32 stats_con_id; 170 __be32 pkt_count; 171 __be64 byte_count; 172 __be64 stats_cookie; 173 }; 174 175 int nfp_flower_metadata_init(struct nfp_app *app); 176 void nfp_flower_metadata_cleanup(struct nfp_app *app); 177 178 int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev, 179 enum tc_setup_type type, void *type_data); 180 int nfp_flower_compile_flow_match(struct tc_cls_flower_offload *flow, 181 struct nfp_fl_key_ls *key_ls, 182 struct net_device *netdev, 183 struct nfp_fl_payload *nfp_flow, 184 enum nfp_flower_tun_type tun_type); 185 int nfp_flower_compile_action(struct tc_cls_flower_offload *flow, 186 struct net_device *netdev, 187 struct nfp_fl_payload *nfp_flow); 188 int nfp_compile_flow_metadata(struct nfp_app *app, 189 struct tc_cls_flower_offload *flow, 190 struct nfp_fl_payload *nfp_flow); 191 int nfp_modify_flow_metadata(struct nfp_app *app, 192 struct nfp_fl_payload *nfp_flow); 193 194 struct nfp_fl_payload * 195 nfp_flower_search_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie); 196 struct nfp_fl_payload * 197 nfp_flower_remove_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie); 198 199 void nfp_flower_rx_flow_stats(struct nfp_app *app, struct sk_buff *skb); 200 201 int nfp_tunnel_config_start(struct nfp_app *app); 202 void nfp_tunnel_config_stop(struct nfp_app *app); 203 void nfp_tunnel_write_macs(struct nfp_app *app); 204 void nfp_tunnel_del_ipv4_off(struct nfp_app *app, __be32 ipv4); 205 void nfp_tunnel_add_ipv4_off(struct nfp_app *app, __be32 ipv4); 206 void nfp_tunnel_request_route(struct nfp_app *app, struct sk_buff *skb); 207 void nfp_tunnel_keep_alive(struct nfp_app *app, struct sk_buff *skb); 208 int nfp_flower_setup_tc_egress_cb(enum tc_setup_type type, void *type_data, 209 void *cb_priv); 210 211 #endif 212