drivers/net/ethernet/broadcom/bnxt/bnxt_tc.h

   1 /* Broadcom NetXtreme-C/E network driver.
   2  *
   3  * Copyright (c) 2017 Broadcom Limited
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation.
   8  */
   9
  10 #ifndef BNXT_TC_H
  11 #define BNXT_TC_H
  12
  13 #ifdef CONFIG_BNXT_FLOWER_OFFLOAD
  14
  15 #include <net/ip_tunnels.h>
  16
  17 /* Structs used for storing the filter/actions of the TC cmd.
  18  */
  19 struct bnxt_tc_l2_key {
  20         u8              dmac[ETH_ALEN];
  21         u8              smac[ETH_ALEN];
  22         __be16          inner_vlan_tpid;
  23         __be16          inner_vlan_tci;
  24         __be16          ether_type;
  25         u8              num_vlans;
  26 };
  27
  28 struct bnxt_tc_l3_key {
  29         union {
  30                 struct {
  31                         struct in_addr daddr;
  32                         struct in_addr saddr;
  33                 } ipv4;
  34                 struct {
  35                         struct in6_addr daddr;
  36                         struct in6_addr saddr;
  37                 } ipv6;
  38         };
  39 };
  40
  41 struct bnxt_tc_l4_key {
  42         u8  ip_proto;
  43         union {
  44                 struct {
  45                         __be16 sport;
  46                         __be16 dport;
  47                 } ports;
  48                 struct {
  49                         u8 type;
  50                         u8 code;
  51                 } icmp;
  52         };
  53 };
  54
  55 struct bnxt_tc_tunnel_key {
  56         struct bnxt_tc_l2_key   l2;
  57         struct bnxt_tc_l3_key   l3;
  58         struct bnxt_tc_l4_key   l4;
  59         __be32                  id;
  60 };
  61
  62 struct bnxt_tc_actions {
  63         u32                             flags;
  64 #define BNXT_TC_ACTION_FLAG_FWD                 BIT(0)
  65 #define BNXT_TC_ACTION_FLAG_FWD_VXLAN           BIT(1)
  66 #define BNXT_TC_ACTION_FLAG_PUSH_VLAN           BIT(3)
  67 #define BNXT_TC_ACTION_FLAG_POP_VLAN            BIT(4)
  68 #define BNXT_TC_ACTION_FLAG_DROP                BIT(5)
  69 #define BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP        BIT(6)
  70 #define BNXT_TC_ACTION_FLAG_TUNNEL_DECAP        BIT(7)
  71
  72         u16                             dst_fid;
  73         struct net_device               *dst_dev;
  74         __be16                          push_vlan_tpid;
  75         __be16                          push_vlan_tci;
  76
  77         /* tunnel encap */
  78         struct ip_tunnel_key            tun_encap_key;
  79 };
  80
  81 struct bnxt_tc_flow {
  82         u32                             flags;
  83 #define BNXT_TC_FLOW_FLAGS_ETH_ADDRS            BIT(1)
  84 #define BNXT_TC_FLOW_FLAGS_IPV4_ADDRS           BIT(2)
  85 #define BNXT_TC_FLOW_FLAGS_IPV6_ADDRS           BIT(3)
  86 #define BNXT_TC_FLOW_FLAGS_PORTS                BIT(4)
  87 #define BNXT_TC_FLOW_FLAGS_ICMP                 BIT(5)
  88 #define BNXT_TC_FLOW_FLAGS_TUNL_ETH_ADDRS       BIT(6)
  89 #define BNXT_TC_FLOW_FLAGS_TUNL_IPV4_ADDRS      BIT(7)
  90 #define BNXT_TC_FLOW_FLAGS_TUNL_IPV6_ADDRS      BIT(8)
  91 #define BNXT_TC_FLOW_FLAGS_TUNL_PORTS           BIT(9)
  92 #define BNXT_TC_FLOW_FLAGS_TUNL_ID              BIT(10)
  93 #define BNXT_TC_FLOW_FLAGS_TUNNEL       (BNXT_TC_FLOW_FLAGS_TUNL_ETH_ADDRS | \
  94                                          BNXT_TC_FLOW_FLAGS_TUNL_IPV4_ADDRS | \
  95                                          BNXT_TC_FLOW_FLAGS_TUNL_IPV6_ADDRS |\
  96                                          BNXT_TC_FLOW_FLAGS_TUNL_PORTS |\
  97                                          BNXT_TC_FLOW_FLAGS_TUNL_ID)
  98
  99         /* flow applicable to pkts ingressing on this fid */
 100         u16                             src_fid;
 101         struct bnxt_tc_l2_key           l2_key;
 102         struct bnxt_tc_l2_key           l2_mask;
 103         struct bnxt_tc_l3_key           l3_key;
 104         struct bnxt_tc_l3_key           l3_mask;
 105         struct bnxt_tc_l4_key           l4_key;
 106         struct bnxt_tc_l4_key           l4_mask;
 107         struct ip_tunnel_key            tun_key;
 108         struct ip_tunnel_key            tun_mask;
 109
 110         struct bnxt_tc_actions          actions;
 111
 112         /* updated stats accounting for hw-counter wrap-around */
 113         struct bnxt_tc_flow_stats       stats;
 114         /* previous snap-shot of stats */
 115         struct bnxt_tc_flow_stats       prev_stats;
 116         unsigned long                   lastused; /* jiffies */
 117         /* for calculating delta from prev_stats and
 118          * updating prev_stats atomically.
 119          */
 120         spinlock_t                      stats_lock;
 121 };
 122
 123 /* Tunnel encap/decap hash table
 124  * This table is used to maintain a list of flows that use
 125  * the same tunnel encap/decap params (ip_daddrs, vni, udp_dport)
 126  * and the FW returned handle.
 127  * A separate table is maintained for encap and decap
 128  */
 129 struct bnxt_tc_tunnel_node {
 130         struct ip_tunnel_key            key;
 131         struct rhash_head               node;
 132
 133         /* tunnel l2 info */
 134         struct bnxt_tc_l2_key           l2_info;
 135
 136 #define INVALID_TUNNEL_HANDLE           cpu_to_le32(0xffffffff)
 137         /* tunnel handle returned by FW */
 138         __le32                          tunnel_handle;
 139
 140         u32                             refcount;
 141         struct rcu_head                 rcu;
 142 };
 143
 144 /* L2 hash table
 145  * The same data-struct is used for L2-flow table and L2-tunnel table.
 146  * The L2 part of a flow or tunnel is stored in a hash table.
 147  * A flow that shares the same L2 key/mask with an
 148  * already existing flow/tunnel must refer to it's flow handle or
 149  * decap_filter_id respectively.
 150  */
 151 struct bnxt_tc_l2_node {
 152         /* hash key: first 16b of key */
 153 #define BNXT_TC_L2_KEY_LEN                      16
 154         struct bnxt_tc_l2_key   key;
 155         struct rhash_head       node;
 156
 157         /* a linked list of flows that share the same l2 key */
 158         struct list_head        common_l2_flows;
 159
 160         /* number of flows/tunnels sharing the l2 key */
 161         u16                     refcount;
 162
 163         struct rcu_head         rcu;
 164 };
 165
 166 struct bnxt_tc_flow_node {
 167         /* hash key: provided by TC */
 168         unsigned long                   cookie;
 169         struct rhash_head               node;
 170
 171         struct bnxt_tc_flow             flow;
 172
 173         __le16                          flow_handle;
 174
 175         /* L2 node in l2 hashtable that shares flow's l2 key */
 176         struct bnxt_tc_l2_node          *l2_node;
 177         /* for the shared_flows list maintained in l2_node */
 178         struct list_head                l2_list_node;
 179
 180         /* tunnel encap related */
 181         struct bnxt_tc_tunnel_node      *encap_node;
 182
 183         /* tunnel decap related */
 184         struct bnxt_tc_tunnel_node      *decap_node;
 185         /* L2 node in tunnel-l2 hashtable that shares flow's tunnel l2 key */
 186         struct bnxt_tc_l2_node          *decap_l2_node;
 187         /* for the shared_flows list maintained in tunnel decap l2_node */
 188         struct list_head                decap_l2_list_node;
 189
 190         struct rcu_head                 rcu;
 191 };
 192
 193 int bnxt_tc_setup_flower(struct bnxt *bp, u16 src_fid,
 194                          struct tc_cls_flower_offload *cls_flower);
 195 int bnxt_init_tc(struct bnxt *bp);
 196 void bnxt_shutdown_tc(struct bnxt *bp);
 197 void bnxt_tc_flow_stats_work(struct bnxt *bp);
 198
 199 static inline bool bnxt_tc_flower_enabled(struct bnxt *bp)
 200 {
 201         return bp->tc_info && bp->tc_info->enabled;
 202 }
 203
 204 #else /* CONFIG_BNXT_FLOWER_OFFLOAD */
 205
 206 static inline int bnxt_tc_setup_flower(struct bnxt *bp, u16 src_fid,
 207                                        struct tc_cls_flower_offload *cls_flower)
 208 {
 209         return -EOPNOTSUPP;
 210 }
 211
 212 static inline int bnxt_init_tc(struct bnxt *bp)
 213 {
 214         return 0;
 215 }
 216
 217 static inline void bnxt_shutdown_tc(struct bnxt *bp)
 218 {
 219 }
 220
 221 static inline void bnxt_tc_flow_stats_work(struct bnxt *bp)
 222 {
 223 }
 224
 225 static inline bool bnxt_tc_flower_enabled(struct bnxt *bp)
 226 {
 227         return false;
 228 }
 229 #endif /* CONFIG_BNXT_FLOWER_OFFLOAD */
 230 #endif /* BNXT_TC_H */