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 42 struct tc_to_netdev; 43 struct net_device; 44 struct nfp_app; 45 46 #define NFP_FL_STATS_ENTRY_RS BIT(20) 47 #define NFP_FL_STATS_ELEM_RS 4 48 #define NFP_FL_REPEATED_HASH_MAX BIT(17) 49 #define NFP_FLOWER_HASH_BITS 19 50 #define NFP_FLOWER_MASK_ENTRY_RS 256 51 #define NFP_FLOWER_MASK_ELEMENT_RS 1 52 #define NFP_FLOWER_MASK_HASH_BITS 10 53 54 #define NFP_FL_META_FLAG_NEW_MASK 128 55 #define NFP_FL_META_FLAG_LAST_MASK 1 56 57 #define NFP_FL_MASK_REUSE_TIME_NS 40000 58 #define NFP_FL_MASK_ID_LOCATION 1 59 60 struct nfp_fl_mask_id { 61 struct circ_buf mask_id_free_list; 62 struct timespec64 *last_used; 63 u8 init_unallocated; 64 }; 65 66 struct nfp_fl_stats_id { 67 struct circ_buf free_list; 68 u32 init_unalloc; 69 u8 repeated_em_count; 70 }; 71 72 /** 73 * struct nfp_flower_priv - Flower APP per-vNIC priv data 74 * @nn: Pointer to vNIC 75 * @mask_id_seed: Seed used for mask hash table 76 * @flower_version: HW version of flower 77 * @stats_ids: List of free stats ids 78 * @mask_ids: List of free mask ids 79 * @mask_table: Hash table used to store masks 80 * @flow_table: Hash table used to store flower rules 81 */ 82 struct nfp_flower_priv { 83 struct nfp_net *nn; 84 u32 mask_id_seed; 85 u64 flower_version; 86 struct nfp_fl_stats_id stats_ids; 87 struct nfp_fl_mask_id mask_ids; 88 DECLARE_HASHTABLE(mask_table, NFP_FLOWER_MASK_HASH_BITS); 89 DECLARE_HASHTABLE(flow_table, NFP_FLOWER_HASH_BITS); 90 }; 91 92 struct nfp_fl_key_ls { 93 u32 key_layer_two; 94 u8 key_layer; 95 int key_size; 96 }; 97 98 struct nfp_fl_rule_metadata { 99 u8 key_len; 100 u8 mask_len; 101 u8 act_len; 102 u8 flags; 103 __be32 host_ctx_id; 104 __be64 host_cookie __packed; 105 __be64 flow_version __packed; 106 __be32 shortcut; 107 }; 108 109 struct nfp_fl_stats { 110 u64 pkts; 111 u64 bytes; 112 u64 used; 113 }; 114 115 struct nfp_fl_payload { 116 struct nfp_fl_rule_metadata meta; 117 unsigned long tc_flower_cookie; 118 struct hlist_node link; 119 struct rcu_head rcu; 120 spinlock_t lock; /* lock stats */ 121 struct nfp_fl_stats stats; 122 char *unmasked_data; 123 char *mask_data; 124 char *action_data; 125 }; 126 127 struct nfp_fl_stats_frame { 128 __be32 stats_con_id; 129 __be32 pkt_count; 130 __be64 byte_count; 131 __be64 stats_cookie; 132 }; 133 134 int nfp_flower_metadata_init(struct nfp_app *app); 135 void nfp_flower_metadata_cleanup(struct nfp_app *app); 136 137 int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev, 138 u32 handle, __be16 proto, struct tc_to_netdev *tc); 139 int nfp_flower_compile_flow_match(struct tc_cls_flower_offload *flow, 140 struct nfp_fl_key_ls *key_ls, 141 struct net_device *netdev, 142 struct nfp_fl_payload *nfp_flow); 143 int nfp_flower_compile_action(struct tc_cls_flower_offload *flow, 144 struct net_device *netdev, 145 struct nfp_fl_payload *nfp_flow); 146 int nfp_compile_flow_metadata(struct nfp_app *app, 147 struct tc_cls_flower_offload *flow, 148 struct nfp_fl_payload *nfp_flow); 149 int nfp_modify_flow_metadata(struct nfp_app *app, 150 struct nfp_fl_payload *nfp_flow); 151 152 struct nfp_fl_payload * 153 nfp_flower_search_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie); 154 struct nfp_fl_payload * 155 nfp_flower_remove_fl_table(struct nfp_app *app, unsigned long tc_flower_cookie); 156 157 void nfp_flower_rx_flow_stats(struct nfp_app *app, struct sk_buff *skb); 158 159 #endif 160