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 struct nfp_fl_mask_id { 62 struct circ_buf mask_id_free_list; 63 struct timespec64 *last_used; 64 u8 init_unallocated; 65 }; 66 67 struct 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 */ 86 struct 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 99 struct nfp_fl_key_ls { 100 u32 key_layer_two; 101 u8 key_layer; 102 int key_size; 103 }; 104 105 struct 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 }; 115 116 struct nfp_fl_stats { 117 u64 pkts; 118 u64 bytes; 119 u64 used; 120 }; 121 122 struct 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 }; 133 134 struct nfp_fl_stats_frame { 135 __be32 stats_con_id; 136 __be32 pkt_count; 137 __be64 byte_count; 138 __be64 stats_cookie; 139 }; 140 141 int nfp_flower_metadata_init(struct nfp_app *app); 142 void nfp_flower_metadata_cleanup(struct nfp_app *app); 143 144 int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev, 145 enum tc_setup_type type, void *type_data); 146 int 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); 150 int nfp_flower_compile_action(struct tc_cls_flower_offload *flow, 151 struct net_device *netdev, 152 struct nfp_fl_payload *nfp_flow); 153 int nfp_compile_flow_metadata(struct nfp_app *app, 154 struct tc_cls_flower_offload *flow, 155 struct nfp_fl_payload *nfp_flow); 156 int nfp_modify_flow_metadata(struct nfp_app *app, 157 struct nfp_fl_payload *nfp_flow); 158 159 struct nfp_fl_payload * 160 nfp_flower_search_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie); 161 struct nfp_fl_payload * 162 nfp_flower_remove_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie); 163 164 void nfp_flower_rx_flow_stats(struct nfp_app *app, struct sk_buff *skb); 165 166 #endif 167