drivers/net/ethernet/mellanox/mlxsw/spectrum_router.h

   1 /* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
   2 /* Copyright (c) 2017-2018 Mellanox Technologies. All rights reserved */
   3
   4 #ifndef _MLXSW_ROUTER_H_
   5 #define _MLXSW_ROUTER_H_
   6
   7 #include "spectrum.h"
   8 #include "reg.h"
   9
  10 struct mlxsw_sp_router_nve_decap {
  11         u32 ul_tb_id;
  12         u32 tunnel_index;
  13         enum mlxsw_sp_l3proto ul_proto;
  14         union mlxsw_sp_l3addr ul_sip;
  15         u8 valid:1;
  16 };
  17
  18 struct mlxsw_sp_fib_entry_op_ctx {
  19         u8 bulk_ok:1, /* Indicate to the low-level op it is ok to bulk
  20                        * the actual entry with the one that is the next
  21                        * in queue.
  22                        */
  23            initialized:1; /* Bit that the low-level op sets in case
  24                            * the context priv is initialized.
  25                            */
  26         struct list_head fib_entry_priv_list;
  27         unsigned long event;
  28         unsigned long ll_priv[];
  29 };
  30
  31 static inline void
  32 mlxsw_sp_fib_entry_op_ctx_clear(struct mlxsw_sp_fib_entry_op_ctx *op_ctx)
  33 {
  34         WARN_ON_ONCE(!list_empty(&op_ctx->fib_entry_priv_list));
  35         memset(op_ctx, 0, sizeof(*op_ctx));
  36         INIT_LIST_HEAD(&op_ctx->fib_entry_priv_list);
  37 }
  38
  39 struct mlxsw_sp_router {
  40         struct mlxsw_sp *mlxsw_sp;
  41         struct mlxsw_sp_rif **rifs;
  42         struct mlxsw_sp_vr *vrs;
  43         struct rhashtable neigh_ht;
  44         struct rhashtable nexthop_group_ht;
  45         struct rhashtable nexthop_ht;
  46         struct list_head nexthop_list;
  47         struct {
  48                 /* One tree for each protocol: IPv4 and IPv6 */
  49                 struct mlxsw_sp_lpm_tree *proto_trees[2];
  50                 struct mlxsw_sp_lpm_tree *trees;
  51                 unsigned int tree_count;
  52         } lpm;
  53         struct {
  54                 struct delayed_work dw;
  55                 unsigned long interval; /* ms */
  56         } neighs_update;
  57         struct delayed_work nexthop_probe_dw;
  58 #define MLXSW_SP_UNRESOLVED_NH_PROBE_INTERVAL 5000 /* ms */
  59         struct list_head nexthop_neighs_list;
  60         struct list_head ipip_list;
  61         bool aborted;
  62         struct notifier_block nexthop_nb;
  63         struct notifier_block fib_nb;
  64         struct notifier_block netevent_nb;
  65         struct notifier_block inetaddr_nb;
  66         struct notifier_block inet6addr_nb;
  67         const struct mlxsw_sp_rif_ops **rif_ops_arr;
  68         const struct mlxsw_sp_ipip_ops **ipip_ops_arr;
  69         u32 adj_discard_index;
  70         bool adj_discard_index_valid;
  71         struct mlxsw_sp_router_nve_decap nve_decap_config;
  72         struct mutex lock; /* Protects shared router resources */
  73         struct work_struct fib_event_work;
  74         struct list_head fib_event_queue;
  75         spinlock_t fib_event_queue_lock; /* Protects fib event queue list */
  76         /* One set of ops for each protocol: IPv4 and IPv6 */
  77         const struct mlxsw_sp_router_ll_ops *proto_ll_ops[MLXSW_SP_L3_PROTO_MAX];
  78         struct mlxsw_sp_fib_entry_op_ctx *ll_op_ctx;
  79         u16 lb_rif_index;
  80         struct mlxsw_sp_router_xm *xm;
  81         const struct mlxsw_sp_adj_grp_size_range *adj_grp_size_ranges;
  82         size_t adj_grp_size_ranges_count;
  83 };
  84
  85 struct mlxsw_sp_fib_entry_priv {
  86         refcount_t refcnt;
  87         struct list_head list; /* Member in op_ctx->fib_entry_priv_list */
  88         unsigned long priv[];
  89 };
  90
  91 enum mlxsw_sp_fib_entry_op {
  92         MLXSW_SP_FIB_ENTRY_OP_WRITE,
  93         MLXSW_SP_FIB_ENTRY_OP_UPDATE,
  94         MLXSW_SP_FIB_ENTRY_OP_DELETE,
  95 };
  96
  97 /* Low-level router ops. Basically this is to handle the different
  98  * register sets to work with ordinary and XM trees and FIB entries.
  99  */
 100 struct mlxsw_sp_router_ll_ops {
 101         int (*init)(struct mlxsw_sp *mlxsw_sp, u16 vr_id,
 102                     enum mlxsw_sp_l3proto proto);
 103         int (*ralta_write)(struct mlxsw_sp *mlxsw_sp, char *xralta_pl);
 104         int (*ralst_write)(struct mlxsw_sp *mlxsw_sp, char *xralst_pl);
 105         int (*raltb_write)(struct mlxsw_sp *mlxsw_sp, char *xraltb_pl);
 106         size_t fib_entry_op_ctx_size;
 107         size_t fib_entry_priv_size;
 108         void (*fib_entry_pack)(struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
 109                                enum mlxsw_sp_l3proto proto, enum mlxsw_sp_fib_entry_op op,
 110                                u16 virtual_router, u8 prefix_len, unsigned char *addr,
 111                                struct mlxsw_sp_fib_entry_priv *priv);
 112         void (*fib_entry_act_remote_pack)(struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
 113                                           enum mlxsw_reg_ralue_trap_action trap_action,
 114                                           u16 trap_id, u32 adjacency_index, u16 ecmp_size);
 115         void (*fib_entry_act_local_pack)(struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
 116                                          enum mlxsw_reg_ralue_trap_action trap_action,
 117                                          u16 trap_id, u16 local_erif);
 118         void (*fib_entry_act_ip2me_pack)(struct mlxsw_sp_fib_entry_op_ctx *op_ctx);
 119         void (*fib_entry_act_ip2me_tun_pack)(struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
 120                                              u32 tunnel_ptr);
 121         int (*fib_entry_commit)(struct mlxsw_sp *mlxsw_sp,
 122                                 struct mlxsw_sp_fib_entry_op_ctx *op_ctx,
 123                                 bool *postponed_for_bulk);
 124         bool (*fib_entry_is_committed)(struct mlxsw_sp_fib_entry_priv *priv);
 125 };
 126
 127 struct mlxsw_sp_rif_ipip_lb;
 128 struct mlxsw_sp_rif_ipip_lb_config {
 129         enum mlxsw_reg_ritr_loopback_ipip_type lb_ipipt;
 130         u32 okey;
 131         enum mlxsw_sp_l3proto ul_protocol; /* Underlay. */
 132         union mlxsw_sp_l3addr saddr;
 133 };
 134
 135 enum mlxsw_sp_rif_counter_dir {
 136         MLXSW_SP_RIF_COUNTER_INGRESS,
 137         MLXSW_SP_RIF_COUNTER_EGRESS,
 138 };
 139
 140 struct mlxsw_sp_neigh_entry;
 141 struct mlxsw_sp_nexthop;
 142 struct mlxsw_sp_ipip_entry;
 143
 144 struct mlxsw_sp_rif *mlxsw_sp_rif_by_index(const struct mlxsw_sp *mlxsw_sp,
 145                                            u16 rif_index);
 146 u16 mlxsw_sp_rif_index(const struct mlxsw_sp_rif *rif);
 147 u16 mlxsw_sp_ipip_lb_rif_index(const struct mlxsw_sp_rif_ipip_lb *rif);
 148 u16 mlxsw_sp_ipip_lb_ul_vr_id(const struct mlxsw_sp_rif_ipip_lb *rif);
 149 u16 mlxsw_sp_ipip_lb_ul_rif_id(const struct mlxsw_sp_rif_ipip_lb *lb_rif);
 150 u32 mlxsw_sp_ipip_dev_ul_tb_id(const struct net_device *ol_dev);
 151 int mlxsw_sp_rif_dev_ifindex(const struct mlxsw_sp_rif *rif);
 152 const struct net_device *mlxsw_sp_rif_dev(const struct mlxsw_sp_rif *rif);
 153 int mlxsw_sp_rif_counter_value_get(struct mlxsw_sp *mlxsw_sp,
 154                                    struct mlxsw_sp_rif *rif,
 155                                    enum mlxsw_sp_rif_counter_dir dir,
 156                                    u64 *cnt);
 157 void mlxsw_sp_rif_counter_free(struct mlxsw_sp *mlxsw_sp,
 158                                struct mlxsw_sp_rif *rif,
 159                                enum mlxsw_sp_rif_counter_dir dir);
 160 int mlxsw_sp_rif_counter_alloc(struct mlxsw_sp *mlxsw_sp,
 161                                struct mlxsw_sp_rif *rif,
 162                                enum mlxsw_sp_rif_counter_dir dir);
 163 struct mlxsw_sp_neigh_entry *
 164 mlxsw_sp_rif_neigh_next(struct mlxsw_sp_rif *rif,
 165                         struct mlxsw_sp_neigh_entry *neigh_entry);
 166 int mlxsw_sp_neigh_entry_type(struct mlxsw_sp_neigh_entry *neigh_entry);
 167 unsigned char *
 168 mlxsw_sp_neigh_entry_ha(struct mlxsw_sp_neigh_entry *neigh_entry);
 169 u32 mlxsw_sp_neigh4_entry_dip(struct mlxsw_sp_neigh_entry *neigh_entry);
 170 struct in6_addr *
 171 mlxsw_sp_neigh6_entry_dip(struct mlxsw_sp_neigh_entry *neigh_entry);
 172
 173 #define mlxsw_sp_rif_neigh_for_each(neigh_entry, rif)                           \
 174         for (neigh_entry = mlxsw_sp_rif_neigh_next(rif, NULL); neigh_entry;     \
 175              neigh_entry = mlxsw_sp_rif_neigh_next(rif, neigh_entry))
 176 int mlxsw_sp_neigh_counter_get(struct mlxsw_sp *mlxsw_sp,
 177                                struct mlxsw_sp_neigh_entry *neigh_entry,
 178                                u64 *p_counter);
 179 void
 180 mlxsw_sp_neigh_entry_counter_update(struct mlxsw_sp *mlxsw_sp,
 181                                     struct mlxsw_sp_neigh_entry *neigh_entry,
 182                                     bool adding);
 183 bool mlxsw_sp_neigh_ipv6_ignore(struct mlxsw_sp_neigh_entry *neigh_entry);
 184 int __mlxsw_sp_ipip_entry_update_tunnel(struct mlxsw_sp *mlxsw_sp,
 185                                         struct mlxsw_sp_ipip_entry *ipip_entry,
 186                                         bool recreate_loopback,
 187                                         bool keep_encap,
 188                                         bool update_nexthops,
 189                                         struct netlink_ext_ack *extack);
 190 void mlxsw_sp_ipip_entry_demote_tunnel(struct mlxsw_sp *mlxsw_sp,
 191                                        struct mlxsw_sp_ipip_entry *ipip_entry);
 192 bool
 193 mlxsw_sp_ipip_demote_tunnel_by_saddr(struct mlxsw_sp *mlxsw_sp,
 194                                      enum mlxsw_sp_l3proto ul_proto,
 195                                      union mlxsw_sp_l3addr saddr,
 196                                      u32 ul_tb_id,
 197                                      const struct mlxsw_sp_ipip_entry *except);
 198 struct mlxsw_sp_nexthop *mlxsw_sp_nexthop_next(struct mlxsw_sp_router *router,
 199                                                struct mlxsw_sp_nexthop *nh);
 200 bool mlxsw_sp_nexthop_is_forward(const struct mlxsw_sp_nexthop *nh);
 201 unsigned char *mlxsw_sp_nexthop_ha(struct mlxsw_sp_nexthop *nh);
 202 int mlxsw_sp_nexthop_indexes(struct mlxsw_sp_nexthop *nh, u32 *p_adj_index,
 203                              u32 *p_adj_size, u32 *p_adj_hash_index);
 204 struct mlxsw_sp_rif *mlxsw_sp_nexthop_rif(struct mlxsw_sp_nexthop *nh);
 205 bool mlxsw_sp_nexthop_group_has_ipip(struct mlxsw_sp_nexthop *nh);
 206 #define mlxsw_sp_nexthop_for_each(nh, router)                           \
 207         for (nh = mlxsw_sp_nexthop_next(router, NULL); nh;              \
 208              nh = mlxsw_sp_nexthop_next(router, nh))
 209 int mlxsw_sp_nexthop_counter_get(struct mlxsw_sp *mlxsw_sp,
 210                                  struct mlxsw_sp_nexthop *nh, u64 *p_counter);
 211 int mlxsw_sp_nexthop_eth_update(struct mlxsw_sp *mlxsw_sp, u32 adj_index,
 212                                 struct mlxsw_sp_nexthop *nh, bool force);
 213 void mlxsw_sp_nexthop_counter_alloc(struct mlxsw_sp *mlxsw_sp,
 214                                     struct mlxsw_sp_nexthop *nh);
 215 void mlxsw_sp_nexthop_counter_free(struct mlxsw_sp *mlxsw_sp,
 216                                    struct mlxsw_sp_nexthop *nh);
 217
 218 static inline bool mlxsw_sp_l3addr_eq(const union mlxsw_sp_l3addr *addr1,
 219                                       const union mlxsw_sp_l3addr *addr2)
 220 {
 221         return !memcmp(addr1, addr2, sizeof(*addr1));
 222 }
 223
 224 int mlxsw_sp_ipip_ecn_encap_init(struct mlxsw_sp *mlxsw_sp);
 225 int mlxsw_sp_ipip_ecn_decap_init(struct mlxsw_sp *mlxsw_sp);
 226
 227 extern const struct mlxsw_sp_router_ll_ops mlxsw_sp_router_ll_xm_ops;
 228
 229 int mlxsw_sp_router_xm_init(struct mlxsw_sp *mlxsw_sp);
 230 void mlxsw_sp_router_xm_fini(struct mlxsw_sp *mlxsw_sp);
 231 bool mlxsw_sp_router_xm_ipv4_is_supported(const struct mlxsw_sp *mlxsw_sp);
 232
 233 #endif /* _MLXSW_ROUTER_H_*/