drivers/net/enic/base/wq_enet_desc.h

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright 2008-2017 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  */
   5
   6 #ifndef _WQ_ENET_DESC_H_
   7 #define _WQ_ENET_DESC_H_
   8
   9 #include <rte_byteorder.h>
  10
  11 /* Ethernet work queue descriptor: 16B */
  12 struct wq_enet_desc {
  13         uint64_t address;
  14         uint16_t length;
  15         uint16_t mss_loopback;
  16         uint16_t header_length_flags;
  17         uint16_t vlan_tag;
  18 };
  19
  20 #define WQ_ENET_ADDR_BITS               64
  21 #define WQ_ENET_LEN_BITS                14
  22 #define WQ_ENET_LEN_MASK                ((1 << WQ_ENET_LEN_BITS) - 1)
  23 #define WQ_ENET_MSS_BITS                14
  24 #define WQ_ENET_MSS_MASK                ((1 << WQ_ENET_MSS_BITS) - 1)
  25 #define WQ_ENET_MSS_SHIFT               2
  26 #define WQ_ENET_LOOPBACK_SHIFT          1
  27 #define WQ_ENET_HDRLEN_BITS             10
  28 #define WQ_ENET_HDRLEN_MASK             ((1 << WQ_ENET_HDRLEN_BITS) - 1)
  29 #define WQ_ENET_FLAGS_OM_BITS           2
  30 #define WQ_ENET_FLAGS_OM_MASK           ((1 << WQ_ENET_FLAGS_OM_BITS) - 1)
  31 #define WQ_ENET_FLAGS_EOP_SHIFT         12
  32 #define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT    13
  33 #define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT  14
  34 #define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT     15
  35
  36 #define WQ_ENET_OFFLOAD_MODE_CSUM       0
  37 #define WQ_ENET_OFFLOAD_MODE_RESERVED   1
  38 #define WQ_ENET_OFFLOAD_MODE_CSUM_L4    2
  39 #define WQ_ENET_OFFLOAD_MODE_TSO        3
  40
  41 static inline void wq_enet_desc_enc(struct wq_enet_desc *desc,
  42         uint64_t address, uint16_t length, uint16_t mss, uint16_t header_length,
  43         uint8_t offload_mode, uint8_t eop, uint8_t cq_entry, uint8_t fcoe_encap,
  44         uint8_t vlan_tag_insert, uint16_t vlan_tag, uint8_t loopback)
  45 {
  46         desc->address = rte_cpu_to_le_64(address);
  47         desc->length = rte_cpu_to_le_16(length & WQ_ENET_LEN_MASK);
  48         desc->mss_loopback = rte_cpu_to_le_16((mss & WQ_ENET_MSS_MASK) <<
  49                 WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT);
  50         desc->header_length_flags = rte_cpu_to_le_16
  51                 ((header_length & WQ_ENET_HDRLEN_MASK) |
  52                 (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS |
  53                 (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT |
  54                 (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT |
  55                 (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT |
  56                 (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT);
  57         desc->vlan_tag = rte_cpu_to_le_16(vlan_tag);
  58 }
  59
  60 static inline void wq_enet_desc_dec(struct wq_enet_desc *desc,
  61         uint64_t *address, uint16_t *length, uint16_t *mss,
  62         uint16_t *header_length, uint8_t *offload_mode, uint8_t *eop,
  63         uint8_t *cq_entry, uint8_t *fcoe_encap, uint8_t *vlan_tag_insert,
  64         uint16_t *vlan_tag, uint8_t *loopback)
  65 {
  66         *address = rte_le_to_cpu_64(desc->address);
  67         *length = rte_le_to_cpu_16(desc->length) & WQ_ENET_LEN_MASK;
  68         *mss = (rte_le_to_cpu_16(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) &
  69                 WQ_ENET_MSS_MASK;
  70         *loopback = (uint8_t)((rte_le_to_cpu_16(desc->mss_loopback) >>
  71                 WQ_ENET_LOOPBACK_SHIFT) & 1);
  72         *header_length = rte_le_to_cpu_16(desc->header_length_flags) &
  73                 WQ_ENET_HDRLEN_MASK;
  74         *offload_mode =
  75                 (uint8_t)((rte_le_to_cpu_16(desc->header_length_flags) >>
  76                 WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK);
  77         *eop = (uint8_t)((rte_le_to_cpu_16(desc->header_length_flags) >>
  78                 WQ_ENET_FLAGS_EOP_SHIFT) & 1);
  79         *cq_entry = (uint8_t)((rte_le_to_cpu_16(desc->header_length_flags) >>
  80                 WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1);
  81         *fcoe_encap = (uint8_t)((rte_le_to_cpu_16(desc->header_length_flags) >>
  82                 WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1);
  83         *vlan_tag_insert =
  84                 (uint8_t)((rte_le_to_cpu_16(desc->header_length_flags) >>
  85                 WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1);
  86         *vlan_tag = rte_le_to_cpu_16(desc->vlan_tag);
  87 }
  88
  89 #endif /* _WQ_ENET_DESC_H_ */