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 /* Structs used for storing the filter/actions of the TC cmd.
  16  */
  17 struct bnxt_tc_l2_key {
  18         u8              dmac[ETH_ALEN];
  19         u8              smac[ETH_ALEN];
  20         __be16          inner_vlan_tpid;
  21         __be16          inner_vlan_tci;
  22         __be16          ether_type;
  23         u8              num_vlans;
  24 };
  25
  26 struct bnxt_tc_l3_key {
  27         union {
  28                 struct {
  29                         struct in_addr daddr;
  30                         struct in_addr saddr;
  31                 } ipv4;
  32                 struct {
  33                         struct in6_addr daddr;
  34                         struct in6_addr saddr;
  35                 } ipv6;
  36         };
  37 };
  38
  39 struct bnxt_tc_l4_key {
  40         u8  ip_proto;
  41         union {
  42                 struct {
  43                         __be16 sport;
  44                         __be16 dport;
  45                 } ports;
  46                 struct {
  47                         u8 type;
  48                         u8 code;
  49                 } icmp;
  50         };
  51 };
  52
  53 struct bnxt_tc_actions {
  54         u32                             flags;
  55 #define BNXT_TC_ACTION_FLAG_FWD                 BIT(0)
  56 #define BNXT_TC_ACTION_FLAG_FWD_VXLAN           BIT(1)
  57 #define BNXT_TC_ACTION_FLAG_PUSH_VLAN           BIT(3)
  58 #define BNXT_TC_ACTION_FLAG_POP_VLAN            BIT(4)
  59 #define BNXT_TC_ACTION_FLAG_DROP                BIT(5)
  60
  61         u16                             dst_fid;
  62         struct net_device               *dst_dev;
  63         __be16                          push_vlan_tpid;
  64         __be16                          push_vlan_tci;
  65 };
  66
  67 struct bnxt_tc_flow_stats {
  68         u64             packets;
  69         u64             bytes;
  70 };
  71
  72 struct bnxt_tc_flow {
  73         u32                             flags;
  74 #define BNXT_TC_FLOW_FLAGS_ETH_ADDRS            BIT(1)
  75 #define BNXT_TC_FLOW_FLAGS_IPV4_ADDRS           BIT(2)
  76 #define BNXT_TC_FLOW_FLAGS_IPV6_ADDRS           BIT(3)
  77 #define BNXT_TC_FLOW_FLAGS_PORTS                BIT(4)
  78 #define BNXT_TC_FLOW_FLAGS_ICMP                 BIT(5)
  79
  80         /* flow applicable to pkts ingressing on this fid */
  81         u16                             src_fid;
  82         struct bnxt_tc_l2_key           l2_key;
  83         struct bnxt_tc_l2_key           l2_mask;
  84         struct bnxt_tc_l3_key           l3_key;
  85         struct bnxt_tc_l3_key           l3_mask;
  86         struct bnxt_tc_l4_key           l4_key;
  87         struct bnxt_tc_l4_key           l4_mask;
  88
  89         struct bnxt_tc_actions          actions;
  90
  91         /* updated stats accounting for hw-counter wrap-around */
  92         struct bnxt_tc_flow_stats       stats;
  93         /* previous snap-shot of stats */
  94         struct bnxt_tc_flow_stats       prev_stats;
  95         unsigned long                   lastused; /* jiffies */
  96 };
  97
  98 /* L2 hash table
  99  * This data-struct is used for L2-flow table.
 100  * The L2 part of a flow is stored in a hash table.
 101  * A flow that shares the same L2 key/mask with an
 102  * already existing flow must refer to it's flow handle.
 103  */
 104 struct bnxt_tc_l2_node {
 105         /* hash key: first 16b of key */
 106 #define BNXT_TC_L2_KEY_LEN                      16
 107         struct bnxt_tc_l2_key   key;
 108         struct rhash_head       node;
 109
 110         /* a linked list of flows that share the same l2 key */
 111         struct list_head        common_l2_flows;
 112
 113         /* number of flows sharing the l2 key */
 114         u16                     refcount;
 115
 116         struct rcu_head         rcu;
 117 };
 118
 119 struct bnxt_tc_flow_node {
 120         /* hash key: provided by TC */
 121         unsigned long                   cookie;
 122         struct rhash_head               node;
 123
 124         struct bnxt_tc_flow             flow;
 125
 126         __le16                          flow_handle;
 127
 128         /* L2 node in l2 hashtable that shares flow's l2 key */
 129         struct bnxt_tc_l2_node          *l2_node;
 130         /* for the shared_flows list maintained in l2_node */
 131         struct list_head                l2_list_node;
 132
 133         struct rcu_head                 rcu;
 134 };
 135
 136 int bnxt_tc_setup_flower(struct bnxt *bp, u16 src_fid,
 137                          struct tc_cls_flower_offload *cls_flower);
 138 int bnxt_init_tc(struct bnxt *bp);
 139 void bnxt_shutdown_tc(struct bnxt *bp);
 140
 141 #else /* CONFIG_BNXT_FLOWER_OFFLOAD */
 142
 143 static inline int bnxt_tc_setup_flower(struct bnxt *bp, u16 src_fid,
 144                                        struct tc_cls_flower_offload *cls_flower)
 145 {
 146         return -EOPNOTSUPP;
 147 }
 148
 149 static inline int bnxt_init_tc(struct bnxt *bp)
 150 {
 151         return 0;
 152 }
 153
 154 static inline void bnxt_shutdown_tc(struct bnxt *bp)
 155 {
 156 }
 157 #endif /* CONFIG_BNXT_FLOWER_OFFLOAD */
 158 #endif /* BNXT_TC_H */