drivers/net/ipn3ke/ipn3ke_flow.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2019 Intel Corporation
   3  */
   4
   5 #ifndef _IPN3KE_FLOW_H_
   6 #define _IPN3KE_FLOW_H_
   7
   8 /**
   9  * Expand the length to DWORD alignment with 'Unused' field.
  10  *
  11  * FLOW KEY:
  12  *  | Unused |Ruler id (id)  | Key1 Key2 … (data) |
  13  *  |--------+---------------+--------------------|
  14  *  | 17bits |    3 bits     |   Total 108 bits   |
  15  * MSB                 --->                      LSB
  16  *
  17  * Note: And the MSb of key data is filled to 0 when it is less
  18  *       than 108 bit.
  19  */
  20 #define IPN3KE_FLOW_KEY_UNUSED_BITS  17
  21 #define IPN3KE_FLOW_KEY_ID_BITS      3
  22 #define IPN3KE_FLOW_KEY_DATA_BITS    108
  23
  24 #define IPN3KE_FLOW_KEY_TOTAL_BITS \
  25                 (IPN3KE_FLOW_KEY_UNUSED_BITS + \
  26                 IPN3KE_FLOW_KEY_ID_BITS + \
  27                 IPN3KE_FLOW_KEY_DATA_BITS)
  28
  29 #define IPN3KE_FLOW_KEY_ID_OFFSET \
  30                 (IPN3KE_FLOW_KEY_UNUSED_BITS)
  31
  32 #define IPN3KE_FLOW_KEY_DATA_OFFSET \
  33                 (IPN3KE_FLOW_KEY_ID_OFFSET + IPN3KE_FLOW_KEY_ID_BITS)
  34
  35 /**
  36  * Expand the length to DWORD alignment with 'Unused' field.
  37  *
  38  * FLOW RESULT:
  39  *  |  Unused | enable (acl) |    uid       |
  40  *  |---------+--------------+--------------|
  41  *  | 15 bits |    1 bit     |   16 bits    |
  42  * MSB              --->                   LSB
  43  */
  44
  45 #define IPN3KE_FLOW_RESULT_UNUSED_BITS 15
  46 #define IPN3KE_FLOW_RESULT_ACL_BITS    1
  47 #define IPN3KE_FLOW_RESULT_UID_BITS    16
  48
  49 #define IPN3KE_FLOW_RESULT_TOTAL_BITS \
  50                 (IPN3KE_FLOW_RESULT_UNUSED_BITS + \
  51                 IPN3KE_FLOW_RESULT_ACL_BITS + \
  52                 IPN3KE_FLOW_RESULT_UID_BITS)
  53
  54 #define IPN3KE_FLOW_RESULT_ACL_OFFSET \
  55                 (IPN3KE_FLOW_RESULT_UNUSED_BITS)
  56
  57 #define IPN3KE_FLOW_RESULT_UID_OFFSET \
  58                 (IPN3KE_FLOW_RESULT_ACL_OFFSET + IPN3KE_FLOW_RESULT_ACL_BITS)
  59
  60 #define IPN3KE_FLOW_RESULT_UID_MAX \
  61                 ((1UL << IPN3KE_FLOW_RESULT_UID_BITS) - 1)
  62
  63 #ifndef BITS_PER_BYTE
  64 #define BITS_PER_BYTE    8
  65 #endif
  66 #define BITS_TO_BYTES(bits) \
  67         (((bits) + BITS_PER_BYTE - 1) / BITS_PER_BYTE)
  68
  69 struct ipn3ke_flow_rule {
  70         uint8_t key[BITS_TO_BYTES(IPN3KE_FLOW_KEY_TOTAL_BITS)];
  71         uint8_t result[BITS_TO_BYTES(IPN3KE_FLOW_RESULT_TOTAL_BITS)];
  72 };
  73
  74 struct rte_flow {
  75         TAILQ_ENTRY(rte_flow) next; /**< Pointer to the next flow structure. */
  76
  77         struct ipn3ke_flow_rule rule;
  78 };
  79
  80 TAILQ_HEAD(ipn3ke_flow_list, rte_flow);
  81
  82 static inline uint16_t ipn3ke_swap16(uint16_t x)
  83 {
  84         return ((x & 0xff) << 8) | ((x >> 8) & 0xff);
  85 }
  86
  87 static inline uint32_t ipn3ke_swap32(uint32_t x)
  88 {
  89         uint32_t high, low;
  90         uint32_t high1, low1;
  91
  92         high = (x >> 16) & 0xffff;
  93         low = x & 0xffff;
  94         high1 = ipn3ke_swap16(low);
  95         high1 = high1 << 16;
  96         low1 = ipn3ke_swap16(high);
  97         low1 = low1 & 0xffff;
  98
  99         return high1 | low1;
 100 }
 101
 102 extern const struct rte_flow_ops ipn3ke_flow_ops;
 103
 104 int ipn3ke_flow_init(void *dev);
 105
 106 #endif /* _IPN3KE_FLOW_H_ */