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_CTX_DONT_CARE cpu_to_be32(0xffffffff) 51 #define NFP_FL_STATS_ENTRY_RS BIT(20) 52 #define NFP_FL_STATS_ELEM_RS 4 53 #define NFP_FL_REPEATED_HASH_MAX BIT(17) 54 #define NFP_FLOWER_HASH_BITS 19 55 #define NFP_FLOWER_MASK_ENTRY_RS 256 56 #define NFP_FLOWER_MASK_ELEMENT_RS 1 57 #define NFP_FLOWER_MASK_HASH_BITS 10 58 59 #define NFP_FL_META_FLAG_MANAGE_MASK BIT(7) 60 61 #define NFP_FL_MASK_REUSE_TIME_NS 40000 62 #define NFP_FL_MASK_ID_LOCATION 1 63 64 #define NFP_FL_VXLAN_PORT 4789 65 #define NFP_FL_GENEVE_PORT 6081 66 67 /* Extra features bitmap. */ 68 #define NFP_FL_FEATS_GENEVE BIT(0) 69 #define NFP_FL_NBI_MTU_SETTING BIT(1) 70 71 struct nfp_fl_mask_id { 72 struct circ_buf mask_id_free_list; 73 struct timespec64 *last_used; 74 u8 init_unallocated; 75 }; 76 77 struct nfp_fl_stats_id { 78 struct circ_buf free_list; 79 u32 init_unalloc; 80 u8 repeated_em_count; 81 }; 82 83 /** 84 * struct nfp_mtu_conf - manage MTU setting 85 * @portnum: NFP port number of repr with requested MTU change 86 * @requested_val: MTU value requested for repr 87 * @ack: Received ack that MTU has been correctly set 88 * @wait_q: Wait queue for MTU acknowledgements 89 * @lock: Lock for setting/reading MTU variables 90 */ 91 struct nfp_mtu_conf { 92 u32 portnum; 93 unsigned int requested_val; 94 bool ack; 95 wait_queue_head_t wait_q; 96 spinlock_t lock; 97 }; 98 99 /** 100 * struct nfp_flower_priv - Flower APP per-vNIC priv data 101 * @app: Back pointer to app 102 * @nn: Pointer to vNIC 103 * @mask_id_seed: Seed used for mask hash table 104 * @flower_version: HW version of flower 105 * @flower_ext_feats: Bitmap of extra features the HW supports 106 * @stats_ids: List of free stats ids 107 * @mask_ids: List of free mask ids 108 * @mask_table: Hash table used to store masks 109 * @flow_table: Hash table used to store flower rules 110 * @cmsg_work: Workqueue for control messages processing 111 * @cmsg_skbs_high: List of higher priority skbs for control message 112 * processing 113 * @cmsg_skbs_low: List of lower priority skbs for control message 114 * processing 115 * @nfp_mac_off_list: List of MAC addresses to offload 116 * @nfp_mac_index_list: List of unique 8-bit indexes for non NFP netdevs 117 * @nfp_ipv4_off_list: List of IPv4 addresses to offload 118 * @nfp_neigh_off_list: List of neighbour offloads 119 * @nfp_mac_off_lock: Lock for the MAC address list 120 * @nfp_mac_index_lock: Lock for the MAC index list 121 * @nfp_ipv4_off_lock: Lock for the IPv4 address list 122 * @nfp_neigh_off_lock: Lock for the neighbour address list 123 * @nfp_mac_off_ids: IDA to manage id assignment for offloaded macs 124 * @nfp_mac_off_count: Number of MACs in address list 125 * @nfp_tun_mac_nb: Notifier to monitor link state 126 * @nfp_tun_neigh_nb: Notifier to monitor neighbour state 127 * @reify_replies: atomically stores the number of replies received 128 * from firmware for repr reify 129 * @reify_wait_queue: wait queue for repr reify response counting 130 * @mtu_conf: Configuration of repr MTU value 131 */ 132 struct nfp_flower_priv { 133 struct nfp_app *app; 134 struct nfp_net *nn; 135 u32 mask_id_seed; 136 u64 flower_version; 137 u64 flower_ext_feats; 138 struct nfp_fl_stats_id stats_ids; 139 struct nfp_fl_mask_id mask_ids; 140 DECLARE_HASHTABLE(mask_table, NFP_FLOWER_MASK_HASH_BITS); 141 DECLARE_HASHTABLE(flow_table, NFP_FLOWER_HASH_BITS); 142 struct work_struct cmsg_work; 143 struct sk_buff_head cmsg_skbs_high; 144 struct sk_buff_head cmsg_skbs_low; 145 struct list_head nfp_mac_off_list; 146 struct list_head nfp_mac_index_list; 147 struct list_head nfp_ipv4_off_list; 148 struct list_head nfp_neigh_off_list; 149 struct mutex nfp_mac_off_lock; 150 struct mutex nfp_mac_index_lock; 151 struct mutex nfp_ipv4_off_lock; 152 spinlock_t nfp_neigh_off_lock; 153 struct ida nfp_mac_off_ids; 154 int nfp_mac_off_count; 155 struct notifier_block nfp_tun_mac_nb; 156 struct notifier_block nfp_tun_neigh_nb; 157 atomic_t reify_replies; 158 wait_queue_head_t reify_wait_queue; 159 struct nfp_mtu_conf mtu_conf; 160 }; 161 162 struct nfp_fl_key_ls { 163 u32 key_layer_two; 164 u8 key_layer; 165 int key_size; 166 }; 167 168 struct nfp_fl_rule_metadata { 169 u8 key_len; 170 u8 mask_len; 171 u8 act_len; 172 u8 flags; 173 __be32 host_ctx_id; 174 __be64 host_cookie __packed; 175 __be64 flow_version __packed; 176 __be32 shortcut; 177 }; 178 179 struct nfp_fl_stats { 180 u64 pkts; 181 u64 bytes; 182 u64 used; 183 }; 184 185 struct nfp_fl_payload { 186 struct nfp_fl_rule_metadata meta; 187 unsigned long tc_flower_cookie; 188 struct hlist_node link; 189 struct rcu_head rcu; 190 spinlock_t lock; /* lock stats */ 191 struct nfp_fl_stats stats; 192 __be32 nfp_tun_ipv4_addr; 193 struct net_device *ingress_dev; 194 char *unmasked_data; 195 char *mask_data; 196 char *action_data; 197 bool ingress_offload; 198 }; 199 200 struct nfp_fl_stats_frame { 201 __be32 stats_con_id; 202 __be32 pkt_count; 203 __be64 byte_count; 204 __be64 stats_cookie; 205 }; 206 207 int nfp_flower_metadata_init(struct nfp_app *app); 208 void nfp_flower_metadata_cleanup(struct nfp_app *app); 209 210 int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev, 211 enum tc_setup_type type, void *type_data); 212 int nfp_flower_compile_flow_match(struct tc_cls_flower_offload *flow, 213 struct nfp_fl_key_ls *key_ls, 214 struct net_device *netdev, 215 struct nfp_fl_payload *nfp_flow, 216 enum nfp_flower_tun_type tun_type); 217 int nfp_flower_compile_action(struct tc_cls_flower_offload *flow, 218 struct net_device *netdev, 219 struct nfp_fl_payload *nfp_flow); 220 int nfp_compile_flow_metadata(struct nfp_app *app, 221 struct tc_cls_flower_offload *flow, 222 struct nfp_fl_payload *nfp_flow, 223 struct net_device *netdev); 224 int nfp_modify_flow_metadata(struct nfp_app *app, 225 struct nfp_fl_payload *nfp_flow); 226 227 struct nfp_fl_payload * 228 nfp_flower_search_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie, 229 struct net_device *netdev, __be32 host_ctx); 230 struct nfp_fl_payload * 231 nfp_flower_remove_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie); 232 233 void nfp_flower_rx_flow_stats(struct nfp_app *app, struct sk_buff *skb); 234 235 int nfp_tunnel_config_start(struct nfp_app *app); 236 void nfp_tunnel_config_stop(struct nfp_app *app); 237 void nfp_tunnel_write_macs(struct nfp_app *app); 238 void nfp_tunnel_del_ipv4_off(struct nfp_app *app, __be32 ipv4); 239 void nfp_tunnel_add_ipv4_off(struct nfp_app *app, __be32 ipv4); 240 void nfp_tunnel_request_route(struct nfp_app *app, struct sk_buff *skb); 241 void nfp_tunnel_keep_alive(struct nfp_app *app, struct sk_buff *skb); 242 int nfp_flower_setup_tc_egress_cb(enum tc_setup_type type, void *type_data, 243 void *cb_priv); 244 245 #endif 246