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 <net/tcp.h> 45 #include <linux/workqueue.h> 46 47 struct net_device; 48 struct nfp_app; 49 50 #define NFP_FL_STATS_ENTRY_RS BIT(20) 51 #define NFP_FL_STATS_ELEM_RS 4 52 #define NFP_FL_REPEATED_HASH_MAX BIT(17) 53 #define NFP_FLOWER_HASH_BITS 19 54 #define NFP_FLOWER_MASK_ENTRY_RS 256 55 #define NFP_FLOWER_MASK_ELEMENT_RS 1 56 #define NFP_FLOWER_MASK_HASH_BITS 10 57 58 #define NFP_FL_META_FLAG_MANAGE_MASK BIT(7) 59 60 #define NFP_FL_MASK_REUSE_TIME_NS 40000 61 #define NFP_FL_MASK_ID_LOCATION 1 62 63 #define NFP_FL_VXLAN_PORT 4789 64 #define NFP_FL_GENEVE_PORT 6081 65 66 /* Extra features bitmap. */ 67 #define NFP_FL_FEATS_GENEVE BIT(0) 68 #define NFP_FL_NBI_MTU_SETTING BIT(1) 69 70 struct nfp_fl_mask_id { 71 struct circ_buf mask_id_free_list; 72 struct timespec64 *last_used; 73 u8 init_unallocated; 74 }; 75 76 struct nfp_fl_stats_id { 77 struct circ_buf free_list; 78 u32 init_unalloc; 79 u8 repeated_em_count; 80 }; 81 82 /** 83 * struct nfp_mtu_conf - manage MTU setting 84 * @portnum: NFP port number of repr with requested MTU change 85 * @requested_val: MTU value requested for repr 86 * @ack: Received ack that MTU has been correctly set 87 * @wait_q: Wait queue for MTU acknowledgements 88 * @lock: Lock for setting/reading MTU variables 89 */ 90 struct nfp_mtu_conf { 91 u32 portnum; 92 unsigned int requested_val; 93 bool ack; 94 wait_queue_head_t wait_q; 95 spinlock_t lock; 96 }; 97 98 /** 99 * struct nfp_flower_priv - Flower APP per-vNIC priv data 100 * @app: Back pointer to app 101 * @nn: Pointer to vNIC 102 * @mask_id_seed: Seed used for mask hash table 103 * @flower_version: HW version of flower 104 * @flower_ext_feats: Bitmap of extra features the HW supports 105 * @stats_ids: List of free stats ids 106 * @mask_ids: List of free mask ids 107 * @mask_table: Hash table used to store masks 108 * @flow_table: Hash table used to store flower rules 109 * @cmsg_work: Workqueue for control messages processing 110 * @cmsg_skbs: List of skbs for control message processing 111 * @nfp_mac_off_list: List of MAC addresses to offload 112 * @nfp_mac_index_list: List of unique 8-bit indexes for non NFP netdevs 113 * @nfp_ipv4_off_list: List of IPv4 addresses to offload 114 * @nfp_neigh_off_list: List of neighbour offloads 115 * @nfp_mac_off_lock: Lock for the MAC address list 116 * @nfp_mac_index_lock: Lock for the MAC index list 117 * @nfp_ipv4_off_lock: Lock for the IPv4 address list 118 * @nfp_neigh_off_lock: Lock for the neighbour address list 119 * @nfp_mac_off_ids: IDA to manage id assignment for offloaded macs 120 * @nfp_mac_off_count: Number of MACs in address list 121 * @nfp_tun_mac_nb: Notifier to monitor link state 122 * @nfp_tun_neigh_nb: Notifier to monitor neighbour state 123 * @reify_replies: atomically stores the number of replies received 124 * from firmware for repr reify 125 * @reify_wait_queue: wait queue for repr reify response counting 126 * @mtu_conf: Configuration of repr MTU value 127 */ 128 struct nfp_flower_priv { 129 struct nfp_app *app; 130 struct nfp_net *nn; 131 u32 mask_id_seed; 132 u64 flower_version; 133 u64 flower_ext_feats; 134 struct nfp_fl_stats_id stats_ids; 135 struct nfp_fl_mask_id mask_ids; 136 DECLARE_HASHTABLE(mask_table, NFP_FLOWER_MASK_HASH_BITS); 137 DECLARE_HASHTABLE(flow_table, NFP_FLOWER_HASH_BITS); 138 struct work_struct cmsg_work; 139 struct sk_buff_head cmsg_skbs; 140 struct list_head nfp_mac_off_list; 141 struct list_head nfp_mac_index_list; 142 struct list_head nfp_ipv4_off_list; 143 struct list_head nfp_neigh_off_list; 144 struct mutex nfp_mac_off_lock; 145 struct mutex nfp_mac_index_lock; 146 struct mutex nfp_ipv4_off_lock; 147 spinlock_t nfp_neigh_off_lock; 148 struct ida nfp_mac_off_ids; 149 int nfp_mac_off_count; 150 struct notifier_block nfp_tun_mac_nb; 151 struct notifier_block nfp_tun_neigh_nb; 152 atomic_t reify_replies; 153 wait_queue_head_t reify_wait_queue; 154 struct nfp_mtu_conf mtu_conf; 155 }; 156 157 struct nfp_fl_key_ls { 158 u32 key_layer_two; 159 u8 key_layer; 160 int key_size; 161 }; 162 163 struct nfp_fl_rule_metadata { 164 u8 key_len; 165 u8 mask_len; 166 u8 act_len; 167 u8 flags; 168 __be32 host_ctx_id; 169 __be64 host_cookie __packed; 170 __be64 flow_version __packed; 171 __be32 shortcut; 172 }; 173 174 struct nfp_fl_stats { 175 u64 pkts; 176 u64 bytes; 177 u64 used; 178 }; 179 180 struct nfp_fl_payload { 181 struct nfp_fl_rule_metadata meta; 182 unsigned long tc_flower_cookie; 183 struct hlist_node link; 184 struct rcu_head rcu; 185 spinlock_t lock; /* lock stats */ 186 struct nfp_fl_stats stats; 187 __be32 nfp_tun_ipv4_addr; 188 char *unmasked_data; 189 char *mask_data; 190 char *action_data; 191 }; 192 193 struct nfp_fl_stats_frame { 194 __be32 stats_con_id; 195 __be32 pkt_count; 196 __be64 byte_count; 197 __be64 stats_cookie; 198 }; 199 200 int nfp_flower_metadata_init(struct nfp_app *app); 201 void nfp_flower_metadata_cleanup(struct nfp_app *app); 202 203 int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev, 204 enum tc_setup_type type, void *type_data); 205 int nfp_flower_compile_flow_match(struct tc_cls_flower_offload *flow, 206 struct nfp_fl_key_ls *key_ls, 207 struct net_device *netdev, 208 struct nfp_fl_payload *nfp_flow, 209 enum nfp_flower_tun_type tun_type); 210 int nfp_flower_compile_action(struct tc_cls_flower_offload *flow, 211 struct net_device *netdev, 212 struct nfp_fl_payload *nfp_flow); 213 int nfp_compile_flow_metadata(struct nfp_app *app, 214 struct tc_cls_flower_offload *flow, 215 struct nfp_fl_payload *nfp_flow); 216 int nfp_modify_flow_metadata(struct nfp_app *app, 217 struct nfp_fl_payload *nfp_flow); 218 219 struct nfp_fl_payload * 220 nfp_flower_search_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie); 221 struct nfp_fl_payload * 222 nfp_flower_remove_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie); 223 224 void nfp_flower_rx_flow_stats(struct nfp_app *app, struct sk_buff *skb); 225 226 int nfp_tunnel_config_start(struct nfp_app *app); 227 void nfp_tunnel_config_stop(struct nfp_app *app); 228 void nfp_tunnel_write_macs(struct nfp_app *app); 229 void nfp_tunnel_del_ipv4_off(struct nfp_app *app, __be32 ipv4); 230 void nfp_tunnel_add_ipv4_off(struct nfp_app *app, __be32 ipv4); 231 void nfp_tunnel_request_route(struct nfp_app *app, struct sk_buff *skb); 232 void nfp_tunnel_keep_alive(struct nfp_app *app, struct sk_buff *skb); 233 int nfp_flower_setup_tc_egress_cb(enum tc_setup_type type, void *type_data, 234 void *cb_priv); 235 236 #endif 237