Line data    Source code

       1             : /*
       2             :  * Copyright (c) 2019 Cisco and/or its affiliates.
       3             :  * Licensed under the Apache License, Version 2.0 (the "License");
       4             :  * you may not use this file except in compliance with the License.
       5             :  * You may obtain a copy of the License at:
       6             :  *
       7             :  *     http://www.apache.org/licenses/LICENSE-2.0
       8             :  *
       9             :  * Unless required by applicable law or agreed to in writing, software
      10             :  * distributed under the License is distributed on an "AS IS" BASIS,
      11             :  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12             :  * See the License for the specific language governing permissions and
      13             :  * limitations under the License.
      14             :  */
      15             : 
      16             : #ifndef __PW_CW_DPO_H__
      17             : #define __PW_CW_DPO_H__
      18             : 
      19             : #include <vnet/vnet.h>
      20             : #include <vnet/mpls/packet.h>
      21             : #include <vnet/dpo/dpo.h>
      22             : 
      23             : /**
      24             :  * A Psuedo Wire Control Word is 4 bytes
      25             :  */
      26             : typedef u32 pw_cw_t;
      27             : 
      28             : /**
      29             :  * A representation of a Psuedo Wire Control Word pop DPO
      30             :  */
      31             : typedef struct pw_cw_dpo_t
      32             : {
      33             :     /**
      34             :      * Next DPO in the graph
      35             :      */
      36             :     dpo_id_t pwcw_parent;
      37             : 
      38             :     /**
      39             :      * Number of locks/users of the label
      40             :      */
      41             :     u16 pwcw_locks;
      42             : } pw_cw_dpo_t;
      43             : 
      44             : /**
      45             :  * @brief Assert that the MPLS label object is less than a cache line in size.
      46             :  * Should this get any bigger then we will need to reconsider how many labels
      47             :  * can be pushed in one object.
      48             :  */
      49             : STATIC_ASSERT_SIZEOF(pw_cw_dpo_t, 2 * sizeof(u64));
      50             : 
      51             : /* #define STATIC_ASSERT_ALIGNOF(d, s)                                      \ */
      52             : /*     STATIC_ASSERT (alignof (d) == sizeof(s), "Align of " #d " must be " # s " bytes") */
      53             : 
      54             : /* STATIC_ASSERT_AIGNOF(pw_cw_dpo_t, u64); */
      55             : 
      56             : /**
      57             :  * @brief Create an PW CW pop
      58             :  *
      59             :  * @param parent The parent of the created MPLS label object
      60             :  * @param dpo The PW CW DPO created
      61             :  */
      62             : extern void pw_cw_dpo_create(const dpo_id_t *paremt,
      63             :                              dpo_id_t *dpo);
      64             : 
      65             : extern u8* format_pw_cw_dpo(u8 *s, va_list *args);
      66             : 
      67             : /*
      68             :  * Encapsulation violation for fast data-path access
      69             :  */
      70             : extern pw_cw_dpo_t *pw_cw_dpo_pool;
      71             : 
      72             : static inline pw_cw_dpo_t *
      73          75 : pw_cw_dpo_get (index_t index)
      74             : {
      75          75 :     return (pool_elt_at_index(pw_cw_dpo_pool, index));
      76             : }
      77             : 
      78             : extern void pw_cw_dpo_module_init(void);
      79             : 
      80             : #endif