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_version.h"
  14 #include "rte_ethdev.h"
  15
  16 #include "ulp_template_db_enum.h"
  17 #include "ulp_template_struct.h"
  18
  19 #if RTE_VERSION_NUM(17, 11, 10, 16) == RTE_VERSION
  20 #define RTE_ETHER_ADDR_LEN      ETHER_ADDR_LEN
  21 #endif
  22
  23 #define BNXT_OUTER_TUN_FLOW(l3_tun, params)             \
  24         ((l3_tun) &&                                    \
  25          ULP_BITMAP_ISSET((params)->act_bitmap.bits,    \
  26                           BNXT_ULP_ACT_BIT_JUMP))
  27 #define BNXT_INNER_TUN_SIGNATURE(l3_tun, l3_tun_decap, params)          \
  28         ((l3_tun) && (l3_tun_decap) &&                                  \
  29          !ULP_BITMAP_ISSET((params)->hdr_bitmap.bits,                   \
  30                            BNXT_ULP_HDR_BIT_O_ETH))
  31
  32 #define BNXT_CACHE_INNER_TUN_FLOW(state, inner_tun_sig) \
  33         ((state) == BNXT_ULP_FLOW_STATE_NORMAL && (inner_tun_sig))
  34 #define BNXT_INNER_TUN_FLOW(state, inner_tun_sig)               \
  35         ((state) == BNXT_ULP_FLOW_STATE_TUN_O_OFFLD && (inner_tun_sig))
  36
  37 /* It is invalid to get another outer flow offload request
  38  * for the same tunnel, while the outer flow is already offloaded.
  39  */
  40 #define BNXT_REJECT_OUTER_TUN_FLOW(state, outer_tun_sig)        \
  41         ((state) == BNXT_ULP_FLOW_STATE_TUN_O_OFFLD && (outer_tun_sig))
  42
  43 #define ULP_TUN_O_DMAC_HDR_FIELD_INDEX  1
  44 #define ULP_TUN_O_IPV4_DIP_INDEX        19
  45 #define ULP_TUN_O_IPV6_DIP_INDEX        17
  46
  47 /* When a flow offload request comes the following state transitions
  48  * happen based on the order in which the outer & inner flow offload
  49  * requests arrive.
  50  *
  51  * If inner tunnel flow offload request arrives first then the flow
  52  * state will remain in BNXT_ULP_FLOW_STATE_NORMAL state.
  53  * The following outer tunnel flow offload request will change the
  54  * state of the flow to BNXT_ULP_FLOW_STATE_TUN_O_OFFLD from
  55  * BNXT_ULP_FLOW_STATE_NORMAL.
  56  *
  57  * If outer tunnel flow offload request arrives first then the flow state
  58  * will change from BNXT_ULP_FLOW_STATE_NORMAL to
  59  * BNXT_ULP_FLOW_STATE_TUN_O_OFFLD.
  60  *
  61  * Once the flow state is in BNXT_ULP_FLOW_STATE_TUN_O_OFFLD, any inner
  62  * tunnel flow offload requests after that point will be treated as a
  63  * normal flow and the tunnel flow state remains in
  64  * BNXT_ULP_FLOW_STATE_TUN_O_OFFLD
  65  */
  66 enum bnxt_ulp_tun_flow_state {
  67         BNXT_ULP_FLOW_STATE_NORMAL = 0,
  68         BNXT_ULP_FLOW_STATE_TUN_O_OFFLD,
  69 };
  70
  71 struct ulp_per_port_flow_info {
  72         enum bnxt_ulp_tun_flow_state            state;
  73         uint32_t                                tun_i_cnt;
  74         STAILQ_HEAD(, ulp_rte_parser_params)    tun_i_prms_list;
  75 };
  76
  77 struct bnxt_tun_cache_entry {
  78         bool                            t_dst_ip_valid;
  79         uint8_t                         t_dmac[RTE_ETHER_ADDR_LEN];
  80         union {
  81                 rte_be32_t              t_dst_ip;
  82                 uint8_t                 t_dst_ip6[16];
  83         };
  84         uint32_t                        outer_tun_flow_id;
  85         uint16_t                        outer_tun_rej_cnt;
  86         struct ulp_per_port_flow_info   tun_flow_info[RTE_MAX_ETHPORTS];
  87 };
  88
  89 void
  90 ulp_tun_tbl_init(struct bnxt_tun_cache_entry *tun_tbl);
  91
  92 void
  93 ulp_clear_tun_entry(struct bnxt_tun_cache_entry *tun_tbl, uint8_t tun_idx);
  94
  95 void
  96 ulp_clear_tun_inner_entry(struct bnxt_tun_cache_entry *tun_tbl, uint32_t fid);
  97
  98 #endif