| // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
| /* Copyright (c) 2019 Mellanox Technologies. All rights reserved */ |
| |
| #include <linux/kernel.h> |
| #include <net/devlink.h> |
| #include <uapi/linux/devlink.h> |
| |
| #include "core.h" |
| #include "reg.h" |
| #include "spectrum.h" |
| |
| /* All driver-specific traps must be documented in |
| * Documentation/networking/devlink/mlxsw.rst |
| */ |
| enum { |
| DEVLINK_MLXSW_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX, |
| DEVLINK_MLXSW_TRAP_ID_IRIF_DISABLED, |
| DEVLINK_MLXSW_TRAP_ID_ERIF_DISABLED, |
| }; |
| |
| #define DEVLINK_MLXSW_TRAP_NAME_IRIF_DISABLED \ |
| "irif_disabled" |
| #define DEVLINK_MLXSW_TRAP_NAME_ERIF_DISABLED \ |
| "erif_disabled" |
| |
| #define MLXSW_SP_TRAP_METADATA DEVLINK_TRAP_METADATA_TYPE_F_IN_PORT |
| |
| static void mlxsw_sp_rx_drop_listener(struct sk_buff *skb, u8 local_port, |
| void *priv); |
| static void mlxsw_sp_rx_exception_listener(struct sk_buff *skb, u8 local_port, |
| void *trap_ctx); |
| |
| #define MLXSW_SP_TRAP_DROP(_id, _group_id) \ |
| DEVLINK_TRAP_GENERIC(DROP, DROP, _id, \ |
| DEVLINK_TRAP_GROUP_GENERIC(_group_id), \ |
| MLXSW_SP_TRAP_METADATA) |
| |
| #define MLXSW_SP_TRAP_DRIVER_DROP(_id, _group_id) \ |
| DEVLINK_TRAP_DRIVER(DROP, DROP, DEVLINK_MLXSW_TRAP_ID_##_id, \ |
| DEVLINK_MLXSW_TRAP_NAME_##_id, \ |
| DEVLINK_TRAP_GROUP_GENERIC(_group_id), \ |
| MLXSW_SP_TRAP_METADATA) |
| |
| #define MLXSW_SP_TRAP_EXCEPTION(_id, _group_id) \ |
| DEVLINK_TRAP_GENERIC(EXCEPTION, TRAP, _id, \ |
| DEVLINK_TRAP_GROUP_GENERIC(_group_id), \ |
| MLXSW_SP_TRAP_METADATA) |
| |
| #define MLXSW_SP_RXL_DISCARD(_id, _group_id) \ |
| MLXSW_RXL(mlxsw_sp_rx_drop_listener, DISCARD_##_id, SET_FW_DEFAULT, \ |
| false, SP_##_group_id, DISCARD) |
| |
| #define MLXSW_SP_RXL_EXCEPTION(_id, _group_id, _action) \ |
| MLXSW_RXL(mlxsw_sp_rx_exception_listener, _id, \ |
| _action, false, SP_##_group_id, DISCARD) |
| |
| static struct devlink_trap mlxsw_sp_traps_arr[] = { |
| MLXSW_SP_TRAP_DROP(SMAC_MC, L2_DROPS), |
| MLXSW_SP_TRAP_DROP(VLAN_TAG_MISMATCH, L2_DROPS), |
| MLXSW_SP_TRAP_DROP(INGRESS_VLAN_FILTER, L2_DROPS), |
| MLXSW_SP_TRAP_DROP(INGRESS_STP_FILTER, L2_DROPS), |
| MLXSW_SP_TRAP_DROP(EMPTY_TX_LIST, L2_DROPS), |
| MLXSW_SP_TRAP_DROP(PORT_LOOPBACK_FILTER, L2_DROPS), |
| MLXSW_SP_TRAP_DROP(BLACKHOLE_ROUTE, L3_DROPS), |
| MLXSW_SP_TRAP_DROP(NON_IP_PACKET, L3_DROPS), |
| MLXSW_SP_TRAP_DROP(UC_DIP_MC_DMAC, L3_DROPS), |
| MLXSW_SP_TRAP_DROP(DIP_LB, L3_DROPS), |
| MLXSW_SP_TRAP_DROP(SIP_MC, L3_DROPS), |
| MLXSW_SP_TRAP_DROP(SIP_LB, L3_DROPS), |
| MLXSW_SP_TRAP_DROP(CORRUPTED_IP_HDR, L3_DROPS), |
| MLXSW_SP_TRAP_DROP(IPV4_SIP_BC, L3_DROPS), |
| MLXSW_SP_TRAP_DROP(IPV6_MC_DIP_RESERVED_SCOPE, L3_DROPS), |
| MLXSW_SP_TRAP_DROP(IPV6_MC_DIP_INTERFACE_LOCAL_SCOPE, L3_DROPS), |
| MLXSW_SP_TRAP_EXCEPTION(MTU_ERROR, L3_DROPS), |
| MLXSW_SP_TRAP_EXCEPTION(TTL_ERROR, L3_DROPS), |
| MLXSW_SP_TRAP_EXCEPTION(RPF, L3_DROPS), |
| MLXSW_SP_TRAP_EXCEPTION(REJECT_ROUTE, L3_DROPS), |
| MLXSW_SP_TRAP_EXCEPTION(UNRESOLVED_NEIGH, L3_DROPS), |
| MLXSW_SP_TRAP_EXCEPTION(IPV4_LPM_UNICAST_MISS, L3_DROPS), |
| MLXSW_SP_TRAP_EXCEPTION(IPV6_LPM_UNICAST_MISS, L3_DROPS), |
| MLXSW_SP_TRAP_DRIVER_DROP(IRIF_DISABLED, L3_DROPS), |
| MLXSW_SP_TRAP_DRIVER_DROP(ERIF_DISABLED, L3_DROPS), |
| MLXSW_SP_TRAP_DROP(NON_ROUTABLE, L3_DROPS), |
| MLXSW_SP_TRAP_EXCEPTION(DECAP_ERROR, TUNNEL_DROPS), |
| MLXSW_SP_TRAP_DROP(OVERLAY_SMAC_MC, TUNNEL_DROPS), |
| }; |
| |
| static struct mlxsw_listener mlxsw_sp_listeners_arr[] = { |
| MLXSW_SP_RXL_DISCARD(ING_PACKET_SMAC_MC, L2_DISCARDS), |
| MLXSW_SP_RXL_DISCARD(ING_SWITCH_VTAG_ALLOW, L2_DISCARDS), |
| MLXSW_SP_RXL_DISCARD(ING_SWITCH_VLAN, L2_DISCARDS), |
| MLXSW_SP_RXL_DISCARD(ING_SWITCH_STP, L2_DISCARDS), |
| MLXSW_SP_RXL_DISCARD(LOOKUP_SWITCH_UC, L2_DISCARDS), |
| MLXSW_SP_RXL_DISCARD(LOOKUP_SWITCH_MC_NULL, L2_DISCARDS), |
| MLXSW_SP_RXL_DISCARD(LOOKUP_SWITCH_LB, L2_DISCARDS), |
| MLXSW_SP_RXL_DISCARD(ROUTER2, L3_DISCARDS), |
| MLXSW_SP_RXL_DISCARD(ING_ROUTER_NON_IP_PACKET, L3_DISCARDS), |
| MLXSW_SP_RXL_DISCARD(ING_ROUTER_UC_DIP_MC_DMAC, L3_DISCARDS), |
| MLXSW_SP_RXL_DISCARD(ING_ROUTER_DIP_LB, L3_DISCARDS), |
| MLXSW_SP_RXL_DISCARD(ING_ROUTER_SIP_MC, L3_DISCARDS), |
| MLXSW_SP_RXL_DISCARD(ING_ROUTER_SIP_LB, L3_DISCARDS), |
| MLXSW_SP_RXL_DISCARD(ING_ROUTER_CORRUPTED_IP_HDR, L3_DISCARDS), |
| MLXSW_SP_RXL_DISCARD(ING_ROUTER_IPV4_SIP_BC, L3_DISCARDS), |
| MLXSW_SP_RXL_DISCARD(IPV6_MC_DIP_RESERVED_SCOPE, L3_DISCARDS), |
| MLXSW_SP_RXL_DISCARD(IPV6_MC_DIP_INTERFACE_LOCAL_SCOPE, L3_DISCARDS), |
| MLXSW_SP_RXL_EXCEPTION(MTUERROR, ROUTER_EXP, TRAP_TO_CPU), |
| MLXSW_SP_RXL_EXCEPTION(TTLERROR, ROUTER_EXP, TRAP_TO_CPU), |
| MLXSW_SP_RXL_EXCEPTION(RPF, RPF, TRAP_TO_CPU), |
| MLXSW_SP_RXL_EXCEPTION(RTR_INGRESS1, REMOTE_ROUTE, TRAP_TO_CPU), |
| MLXSW_SP_RXL_EXCEPTION(HOST_MISS_IPV4, HOST_MISS, TRAP_TO_CPU), |
| MLXSW_SP_RXL_EXCEPTION(HOST_MISS_IPV6, HOST_MISS, TRAP_TO_CPU), |
| MLXSW_SP_RXL_EXCEPTION(DISCARD_ROUTER3, REMOTE_ROUTE, |
| TRAP_EXCEPTION_TO_CPU), |
| MLXSW_SP_RXL_EXCEPTION(DISCARD_ROUTER_LPM4, ROUTER_EXP, |
| TRAP_EXCEPTION_TO_CPU), |
| MLXSW_SP_RXL_EXCEPTION(DISCARD_ROUTER_LPM6, ROUTER_EXP, |
| TRAP_EXCEPTION_TO_CPU), |
| MLXSW_SP_RXL_DISCARD(ROUTER_IRIF_EN, L3_DISCARDS), |
| MLXSW_SP_RXL_DISCARD(ROUTER_ERIF_EN, L3_DISCARDS), |
| MLXSW_SP_RXL_DISCARD(NON_ROUTABLE, L3_DISCARDS), |
| MLXSW_SP_RXL_EXCEPTION(DECAP_ECN0, ROUTER_EXP, TRAP_EXCEPTION_TO_CPU), |
| MLXSW_SP_RXL_EXCEPTION(IPIP_DECAP_ERROR, ROUTER_EXP, |
| TRAP_EXCEPTION_TO_CPU), |
| MLXSW_SP_RXL_EXCEPTION(DISCARD_DEC_PKT, TUNNEL_DISCARDS, |
| TRAP_EXCEPTION_TO_CPU), |
| MLXSW_SP_RXL_DISCARD(OVERLAY_SMAC_MC, TUNNEL_DISCARDS), |
| }; |
| |
| /* Mapping between hardware trap and devlink trap. Multiple hardware traps can |
| * be mapped to the same devlink trap. Order is according to |
| * 'mlxsw_sp_listeners_arr'. |
| */ |
| static u16 mlxsw_sp_listener_devlink_map[] = { |
| DEVLINK_TRAP_GENERIC_ID_SMAC_MC, |
| DEVLINK_TRAP_GENERIC_ID_VLAN_TAG_MISMATCH, |
| DEVLINK_TRAP_GENERIC_ID_INGRESS_VLAN_FILTER, |
| DEVLINK_TRAP_GENERIC_ID_INGRESS_STP_FILTER, |
| DEVLINK_TRAP_GENERIC_ID_EMPTY_TX_LIST, |
| DEVLINK_TRAP_GENERIC_ID_EMPTY_TX_LIST, |
| DEVLINK_TRAP_GENERIC_ID_PORT_LOOPBACK_FILTER, |
| DEVLINK_TRAP_GENERIC_ID_BLACKHOLE_ROUTE, |
| DEVLINK_TRAP_GENERIC_ID_NON_IP_PACKET, |
| DEVLINK_TRAP_GENERIC_ID_UC_DIP_MC_DMAC, |
| DEVLINK_TRAP_GENERIC_ID_DIP_LB, |
| DEVLINK_TRAP_GENERIC_ID_SIP_MC, |
| DEVLINK_TRAP_GENERIC_ID_SIP_LB, |
| DEVLINK_TRAP_GENERIC_ID_CORRUPTED_IP_HDR, |
| DEVLINK_TRAP_GENERIC_ID_IPV4_SIP_BC, |
| DEVLINK_TRAP_GENERIC_ID_IPV6_MC_DIP_RESERVED_SCOPE, |
| DEVLINK_TRAP_GENERIC_ID_IPV6_MC_DIP_INTERFACE_LOCAL_SCOPE, |
| DEVLINK_TRAP_GENERIC_ID_MTU_ERROR, |
| DEVLINK_TRAP_GENERIC_ID_TTL_ERROR, |
| DEVLINK_TRAP_GENERIC_ID_RPF, |
| DEVLINK_TRAP_GENERIC_ID_REJECT_ROUTE, |
| DEVLINK_TRAP_GENERIC_ID_UNRESOLVED_NEIGH, |
| DEVLINK_TRAP_GENERIC_ID_UNRESOLVED_NEIGH, |
| DEVLINK_TRAP_GENERIC_ID_UNRESOLVED_NEIGH, |
| DEVLINK_TRAP_GENERIC_ID_IPV4_LPM_UNICAST_MISS, |
| DEVLINK_TRAP_GENERIC_ID_IPV6_LPM_UNICAST_MISS, |
| DEVLINK_MLXSW_TRAP_ID_IRIF_DISABLED, |
| DEVLINK_MLXSW_TRAP_ID_ERIF_DISABLED, |
| DEVLINK_TRAP_GENERIC_ID_NON_ROUTABLE, |
| DEVLINK_TRAP_GENERIC_ID_DECAP_ERROR, |
| DEVLINK_TRAP_GENERIC_ID_DECAP_ERROR, |
| DEVLINK_TRAP_GENERIC_ID_DECAP_ERROR, |
| DEVLINK_TRAP_GENERIC_ID_OVERLAY_SMAC_MC, |
| }; |
| |
| static int mlxsw_sp_rx_listener(struct mlxsw_sp *mlxsw_sp, struct sk_buff *skb, |
| u8 local_port, |
| struct mlxsw_sp_port *mlxsw_sp_port) |
| { |
| struct mlxsw_sp_port_pcpu_stats *pcpu_stats; |
| |
| if (unlikely(!mlxsw_sp_port)) { |
| dev_warn_ratelimited(mlxsw_sp->bus_info->dev, "Port %d: skb received for non-existent port\n", |
| local_port); |
| kfree_skb(skb); |
| return -EINVAL; |
| } |
| |
| skb->dev = mlxsw_sp_port->dev; |
| |
| pcpu_stats = this_cpu_ptr(mlxsw_sp_port->pcpu_stats); |
| u64_stats_update_begin(&pcpu_stats->syncp); |
| pcpu_stats->rx_packets++; |
| pcpu_stats->rx_bytes += skb->len; |
| u64_stats_update_end(&pcpu_stats->syncp); |
| |
| skb->protocol = eth_type_trans(skb, skb->dev); |
| |
| return 0; |
| } |
| |
| static void mlxsw_sp_rx_drop_listener(struct sk_buff *skb, u8 local_port, |
| void *trap_ctx) |
| { |
| struct devlink_port *in_devlink_port; |
| struct mlxsw_sp_port *mlxsw_sp_port; |
| struct mlxsw_sp *mlxsw_sp; |
| struct devlink *devlink; |
| |
| mlxsw_sp = devlink_trap_ctx_priv(trap_ctx); |
| mlxsw_sp_port = mlxsw_sp->ports[local_port]; |
| |
| if (mlxsw_sp_rx_listener(mlxsw_sp, skb, local_port, mlxsw_sp_port)) |
| return; |
| |
| devlink = priv_to_devlink(mlxsw_sp->core); |
| in_devlink_port = mlxsw_core_port_devlink_port_get(mlxsw_sp->core, |
| local_port); |
| skb_push(skb, ETH_HLEN); |
| devlink_trap_report(devlink, skb, trap_ctx, in_devlink_port); |
| consume_skb(skb); |
| } |
| |
| static void mlxsw_sp_rx_exception_listener(struct sk_buff *skb, u8 local_port, |
| void *trap_ctx) |
| { |
| struct devlink_port *in_devlink_port; |
| struct mlxsw_sp_port *mlxsw_sp_port; |
| struct mlxsw_sp *mlxsw_sp; |
| struct devlink *devlink; |
| |
| mlxsw_sp = devlink_trap_ctx_priv(trap_ctx); |
| mlxsw_sp_port = mlxsw_sp->ports[local_port]; |
| |
| if (mlxsw_sp_rx_listener(mlxsw_sp, skb, local_port, mlxsw_sp_port)) |
| return; |
| |
| devlink = priv_to_devlink(mlxsw_sp->core); |
| in_devlink_port = mlxsw_core_port_devlink_port_get(mlxsw_sp->core, |
| local_port); |
| skb_push(skb, ETH_HLEN); |
| devlink_trap_report(devlink, skb, trap_ctx, in_devlink_port); |
| skb_pull(skb, ETH_HLEN); |
| skb->offload_fwd_mark = 1; |
| netif_receive_skb(skb); |
| } |
| |
| int mlxsw_sp_devlink_traps_init(struct mlxsw_sp *mlxsw_sp) |
| { |
| struct devlink *devlink = priv_to_devlink(mlxsw_sp->core); |
| |
| if (WARN_ON(ARRAY_SIZE(mlxsw_sp_listener_devlink_map) != |
| ARRAY_SIZE(mlxsw_sp_listeners_arr))) |
| return -EINVAL; |
| |
| return devlink_traps_register(devlink, mlxsw_sp_traps_arr, |
| ARRAY_SIZE(mlxsw_sp_traps_arr), |
| mlxsw_sp); |
| } |
| |
| void mlxsw_sp_devlink_traps_fini(struct mlxsw_sp *mlxsw_sp) |
| { |
| struct devlink *devlink = priv_to_devlink(mlxsw_sp->core); |
| |
| devlink_traps_unregister(devlink, mlxsw_sp_traps_arr, |
| ARRAY_SIZE(mlxsw_sp_traps_arr)); |
| } |
| |
| int mlxsw_sp_trap_init(struct mlxsw_core *mlxsw_core, |
| const struct devlink_trap *trap, void *trap_ctx) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(mlxsw_sp_listener_devlink_map); i++) { |
| struct mlxsw_listener *listener; |
| int err; |
| |
| if (mlxsw_sp_listener_devlink_map[i] != trap->id) |
| continue; |
| listener = &mlxsw_sp_listeners_arr[i]; |
| |
| err = mlxsw_core_trap_register(mlxsw_core, listener, trap_ctx); |
| if (err) |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| void mlxsw_sp_trap_fini(struct mlxsw_core *mlxsw_core, |
| const struct devlink_trap *trap, void *trap_ctx) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(mlxsw_sp_listener_devlink_map); i++) { |
| struct mlxsw_listener *listener; |
| |
| if (mlxsw_sp_listener_devlink_map[i] != trap->id) |
| continue; |
| listener = &mlxsw_sp_listeners_arr[i]; |
| |
| mlxsw_core_trap_unregister(mlxsw_core, listener, trap_ctx); |
| } |
| } |
| |
| int mlxsw_sp_trap_action_set(struct mlxsw_core *mlxsw_core, |
| const struct devlink_trap *trap, |
| enum devlink_trap_action action) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(mlxsw_sp_listener_devlink_map); i++) { |
| enum mlxsw_reg_hpkt_action hw_action; |
| struct mlxsw_listener *listener; |
| int err; |
| |
| if (mlxsw_sp_listener_devlink_map[i] != trap->id) |
| continue; |
| listener = &mlxsw_sp_listeners_arr[i]; |
| |
| switch (action) { |
| case DEVLINK_TRAP_ACTION_DROP: |
| hw_action = MLXSW_REG_HPKT_ACTION_SET_FW_DEFAULT; |
| break; |
| case DEVLINK_TRAP_ACTION_TRAP: |
| hw_action = MLXSW_REG_HPKT_ACTION_TRAP_EXCEPTION_TO_CPU; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| err = mlxsw_core_trap_action_set(mlxsw_core, listener, |
| hw_action); |
| if (err) |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| #define MLXSW_SP_DISCARD_POLICER_ID (MLXSW_REG_HTGT_TRAP_GROUP_MAX + 1) |
| |
| static int |
| mlxsw_sp_trap_group_policer_init(struct mlxsw_sp *mlxsw_sp, |
| const struct devlink_trap_group *group) |
| { |
| enum mlxsw_reg_qpcr_ir_units ir_units; |
| char qpcr_pl[MLXSW_REG_QPCR_LEN]; |
| u16 policer_id; |
| u8 burst_size; |
| bool is_bytes; |
| u32 rate; |
| |
| switch (group->id) { |
| case DEVLINK_TRAP_GROUP_GENERIC_ID_L2_DROPS: /* fall through */ |
| case DEVLINK_TRAP_GROUP_GENERIC_ID_L3_DROPS: /* fall through */ |
| case DEVLINK_TRAP_GROUP_GENERIC_ID_TUNNEL_DROPS: |
| policer_id = MLXSW_SP_DISCARD_POLICER_ID; |
| ir_units = MLXSW_REG_QPCR_IR_UNITS_M; |
| is_bytes = false; |
| rate = 10 * 1024; /* 10Kpps */ |
| burst_size = 7; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| mlxsw_reg_qpcr_pack(qpcr_pl, policer_id, ir_units, is_bytes, rate, |
| burst_size); |
| return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(qpcr), qpcr_pl); |
| } |
| |
| static int |
| __mlxsw_sp_trap_group_init(struct mlxsw_sp *mlxsw_sp, |
| const struct devlink_trap_group *group) |
| { |
| char htgt_pl[MLXSW_REG_HTGT_LEN]; |
| u8 priority, tc, group_id; |
| u16 policer_id; |
| |
| switch (group->id) { |
| case DEVLINK_TRAP_GROUP_GENERIC_ID_L2_DROPS: |
| group_id = MLXSW_REG_HTGT_TRAP_GROUP_SP_L2_DISCARDS; |
| policer_id = MLXSW_SP_DISCARD_POLICER_ID; |
| priority = 0; |
| tc = 1; |
| break; |
| case DEVLINK_TRAP_GROUP_GENERIC_ID_L3_DROPS: |
| group_id = MLXSW_REG_HTGT_TRAP_GROUP_SP_L3_DISCARDS; |
| policer_id = MLXSW_SP_DISCARD_POLICER_ID; |
| priority = 0; |
| tc = 1; |
| break; |
| case DEVLINK_TRAP_GROUP_GENERIC_ID_TUNNEL_DROPS: |
| group_id = MLXSW_REG_HTGT_TRAP_GROUP_SP_TUNNEL_DISCARDS; |
| policer_id = MLXSW_SP_DISCARD_POLICER_ID; |
| priority = 0; |
| tc = 1; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| mlxsw_reg_htgt_pack(htgt_pl, group_id, policer_id, priority, tc); |
| return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(htgt), htgt_pl); |
| } |
| |
| int mlxsw_sp_trap_group_init(struct mlxsw_core *mlxsw_core, |
| const struct devlink_trap_group *group) |
| { |
| struct mlxsw_sp *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core); |
| int err; |
| |
| err = mlxsw_sp_trap_group_policer_init(mlxsw_sp, group); |
| if (err) |
| return err; |
| |
| err = __mlxsw_sp_trap_group_init(mlxsw_sp, group); |
| if (err) |
| return err; |
| |
| return 0; |
| } |
