Line data    Source code

       1             : /* SPDX-License-Identifier: BSD-2-Clause
       2             :  * Copyright(c) HCL TECHNOLOGIES LTD
       3             :  * Submitted on behalf of a third-party: Intel Corporation, a
       4             :  * Delaware corporation, having its principal place of business
       5             :  * at 2200 Mission College Boulevard,
       6             :  * Santa Clara, California 95052, USA
       7             :  */
       8             : 
       9             : #ifndef __VR_DPDK_N3K_NEXTHOP_H__
      10             : #define __VR_DPDK_N3K_NEXTHOP_H__
      11             : 
      12             : #include <rte_byteorder.h>
      13             : #include "vr_defs.h"
      14             : #include "vr_nexthop.h"
      15             : #include "vr_packet.h"
      16             : 
      17             : /* validates whether nexthop satisfies all the preconditions required by the
      18             :  * n3k offload module.
      19             :  *
      20             :  * @return
      21             :  *   0 on success
      22             :  *   -EAGAIN on detected concurrent modification
      23             :  *   -ENOENT on nh==NULL
      24             :  *   -ENOTSUP on other conditions
      25             :  */
      26             : int vr_dpdk_n3k_offload_nexthop_validate(const struct vr_nexthop* nh);
      27             : 
      28             : /* Note: Do not persist the returned pointer across the callback boundary.
      29             :  *
      30             :  * Returns NULL if the nexthop doesn't exists or fails validation (see
      31             :  * vr_dpdk_n3k_offload_nexthop_validate) */
      32             : const struct vr_nexthop * vr_dpdk_n3k_offload_nexthop_get(uint32_t id);
      33             : 
      34             : extern const uint8_t vr_n3k_offload_zero_mac[VR_ETHER_ALEN];
      35             : 
      36         197 : static const uint8_t get_first_valid_ecmp_index(const struct vr_nexthop* nh) {
      37             :     int i;
      38         788 :     for (i = 0; i < VR_MAX_PHY_INF; ++i) {
      39         591 :         if (!nh->nh_encap_valid[i])
      40         591 :             continue;
      41           0 :         return i;
      42             :     }
      43         197 :     return 0;
      44             : }
      45             : 
      46         197 : static inline const uint8_t nh_validate_underlay_index(const struct vr_nexthop* nh, int8_t underlay_ecmp_index) {
      47         197 :     if( !(nh->nh_flags & NH_FLAG_TUNNEL_UNDERLAY_ECMP) ) {
      48         197 :         return get_first_valid_ecmp_index(nh);
      49             :     }
      50             : 
      51           0 :     if( underlay_ecmp_index < 0 ) {
      52           0 :         return get_first_valid_ecmp_index(nh);
      53             :     }
      54             : 
      55           0 :     if( underlay_ecmp_index >= VR_MAX_PHY_INF ) {
      56           0 :         return get_first_valid_ecmp_index(nh);
      57             :     }
      58             : 
      59           0 :     if( !nh->nh_encap_valid[underlay_ecmp_index] ) {
      60           0 :         return get_first_valid_ecmp_index(nh);
      61             :     }
      62             : 
      63           0 :     return underlay_ecmp_index;
      64             : }
      65             : 
      66          66 : static inline const uint8_t *nh_src_mac(const struct vr_nexthop* nh, int8_t underlay_ecmp_index) {
      67          66 :     uint8_t loc_ecmp_index = nh_validate_underlay_index(nh, underlay_ecmp_index);
      68             : 
      69          66 :     if (nh->nh_data_size >= ((2 * VR_ETHER_ALEN)+(loc_ecmp_index*VR_ETHER_HLEN))) {
      70          66 :         struct vr_eth *eth = (struct vr_eth *)(nh->nh_data + (loc_ecmp_index*(VR_ETHER_HLEN)));
      71          66 :         return eth->eth_smac;
      72             :     } else {
      73           0 :         return vr_n3k_offload_zero_mac;
      74             :     }
      75             : }
      76             : 
      77          69 : static inline const uint8_t *nh_dst_mac(const struct vr_nexthop* nh, int8_t underlay_ecmp_index) {
      78          69 :     uint8_t loc_ecmp_index = nh_validate_underlay_index(nh, underlay_ecmp_index);
      79             : 
      80          69 :     if (nh->nh_data_size >= ((2 * VR_ETHER_ALEN)+(loc_ecmp_index*VR_ETHER_HLEN))) {
      81          69 :         struct vr_eth *eth = (struct vr_eth *)(nh->nh_data + (loc_ecmp_index*(VR_ETHER_HLEN)));
      82          69 :         return eth->eth_dmac;
      83             :     } else {
      84           0 :         return vr_n3k_offload_zero_mac;
      85             :     }
      86             : }
      87             : 
      88          60 : static inline rte_be32_t nh_tunnel_src_ip(const struct vr_nexthop* nh) {
      89             :     _Static_assert(
      90             :             offsetof(struct vr_nexthop, nh_udp_tun_sip) ==
      91             :             offsetof(struct vr_nexthop, nh_vxlan_tun_sip) &&
      92             :             offsetof(struct vr_nexthop, nh_gre_tun_sip) ==
      93             :             offsetof(struct vr_nexthop, nh_vxlan_tun_sip),
      94             :             "nh_vxlan_tun_sip can be used regardless of tunnel type");
      95          60 :     return nh->nh_type == NH_TUNNEL ? nh->nh_vxlan_tun_sip : 0;
      96             : }
      97             : 
      98          60 : static inline rte_be32_t nh_tunnel_dst_ip(const struct vr_nexthop* nh) {
      99             :     _Static_assert(
     100             :             offsetof(struct vr_nexthop, nh_udp_tun_dip) ==
     101             :             offsetof(struct vr_nexthop, nh_vxlan_tun_dip) &&
     102             :             offsetof(struct vr_nexthop, nh_gre_tun_dip) ==
     103             :             offsetof(struct vr_nexthop, nh_vxlan_tun_dip),
     104             :             "nh_vxlan_tun_dip can be used regardless of tunnel type");
     105          60 :     return nh->nh_type == NH_TUNNEL ? nh->nh_vxlan_tun_dip : 0;
     106             : }
     107             : 
     108          62 : static inline uint16_t nh_interface_id(const struct vr_nexthop* nh, int8_t underlay_ecmp_index) {
     109          62 :     uint8_t loc_ecmp_index = nh_validate_underlay_index(nh, underlay_ecmp_index);
     110             : 
     111          62 :     return nh->nh_dev_arr[loc_ecmp_index] != NULL ? nh->nh_dev_arr[loc_ecmp_index]->vif_idx : -1;
     112             : }
     113             : 
     114             : int vr_dpdk_n3k_offload_nexthop_get_cnh_idx(
     115             :     const struct vr_nexthop *nh, uint16_t idx, uint32_t *nh_idx);
     116             : int vr_dpdk_n3k_offload_nexthop_get_cnh_label(
     117             :     const struct vr_nexthop *nh, uint16_t idx, uint32_t *label);
     118             : 
     119             : #endif // __VR_DPDK_N3K_NEXTHOP_H__