drivers/net/bnxt/tf_ulp/ulp_tun.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2014-2021 Broadcom
   3  * All rights reserved.
   4  */
   5
   6 #ifndef _BNXT_TUN_H_
   7 #define _BNXT_TUN_H_
   8
   9 #include <inttypes.h>
  10 #include <stdbool.h>
  11 #include <sys/queue.h>
  12
  13 #include "rte_ethdev.h"
  14
  15 #include "ulp_template_db_enum.h"
  16 #include "ulp_template_struct.h"
  17
  18 #define BNXT_OUTER_TUN_FLOW(l3_tun, params)             \
  19         ((l3_tun) &&                                    \
  20          ULP_BITMAP_ISSET((params)->act_bitmap.bits,    \
  21                           BNXT_ULP_ACTION_BIT_JUMP))
  22 #define BNXT_INNER_TUN_SIGNATURE(l3_tun, l3_tun_decap, params)          \
  23         ((l3_tun) && (l3_tun_decap) &&                                  \
  24          !ULP_BITMAP_ISSET((params)->hdr_bitmap.bits,                   \
  25                            BNXT_ULP_HDR_BIT_O_ETH))
  26
  27 #define BNXT_CACHE_INNER_TUN_FLOW(state, inner_tun_sig) \
  28         ((state) == BNXT_ULP_FLOW_STATE_NORMAL && (inner_tun_sig))
  29 #define BNXT_INNER_TUN_FLOW(state, inner_tun_sig)               \
  30         ((state) == BNXT_ULP_FLOW_STATE_TUN_O_OFFLD && (inner_tun_sig))
  31
  32 /* It is invalid to get another outer flow offload request
  33  * for the same tunnel, while the outer flow is already offloaded.
  34  */
  35 #define BNXT_REJECT_OUTER_TUN_FLOW(state, outer_tun_sig)        \
  36         ((state) == BNXT_ULP_FLOW_STATE_TUN_O_OFFLD && (outer_tun_sig))
  37
  38 #define ULP_TUN_O_DMAC_HDR_FIELD_INDEX  1
  39 #define ULP_TUN_O_IPV4_DIP_INDEX        19
  40 #define ULP_TUN_O_IPV6_DIP_INDEX        17
  41
  42 /* When a flow offload request comes the following state transitions
  43  * happen based on the order in which the outer & inner flow offload
  44  * requests arrive.
  45  *
  46  * If inner tunnel flow offload request arrives first then the flow
  47  * state will remain in BNXT_ULP_FLOW_STATE_NORMAL state.
  48  * The following outer tunnel flow offload request will change the
  49  * state of the flow to BNXT_ULP_FLOW_STATE_TUN_O_OFFLD from
  50  * BNXT_ULP_FLOW_STATE_NORMAL.
  51  *
  52  * If outer tunnel flow offload request arrives first then the flow state
  53  * will change from BNXT_ULP_FLOW_STATE_NORMAL to
  54  * BNXT_ULP_FLOW_STATE_TUN_O_OFFLD.
  55  *
  56  * Once the flow state is in BNXT_ULP_FLOW_STATE_TUN_O_OFFLD, any inner
  57  * tunnel flow offload requests after that point will be treated as a
  58  * normal flow and the tunnel flow state remains in
  59  * BNXT_ULP_FLOW_STATE_TUN_O_OFFLD
  60  */
  61 enum bnxt_ulp_tun_flow_state {
  62         BNXT_ULP_FLOW_STATE_NORMAL = 0,
  63         BNXT_ULP_FLOW_STATE_TUN_O_OFFLD,
  64 };
  65
  66 struct ulp_per_port_flow_info {
  67         enum bnxt_ulp_tun_flow_state            state;
  68         uint32_t                                tun_i_cnt;
  69         STAILQ_HEAD(, ulp_rte_parser_params)    tun_i_prms_list;
  70 };
  71
  72 struct bnxt_tun_cache_entry {
  73         bool                            t_dst_ip_valid;
  74         uint8_t                         t_dmac[RTE_ETHER_ADDR_LEN];
  75         union {
  76                 rte_be32_t              t_dst_ip;
  77                 uint8_t                 t_dst_ip6[16];
  78         };
  79         uint32_t                        outer_tun_flow_id;
  80         uint16_t                        outer_tun_rej_cnt;
  81         struct ulp_per_port_flow_info   tun_flow_info[RTE_MAX_ETHPORTS];
  82 };
  83
  84 void
  85 ulp_tun_tbl_init(struct bnxt_tun_cache_entry *tun_tbl);
  86
  87 void
  88 ulp_clear_tun_entry(struct bnxt_tun_cache_entry *tun_tbl, uint8_t tun_idx);
  89
  90 void
  91 ulp_clear_tun_inner_entry(struct bnxt_tun_cache_entry *tun_tbl, uint32_t fid);
  92
  93 #endif