LCOV - code coverage report
Current view: top level - drivers/scsi/snic - wq_enet_desc.h (source / functions) Hit Total Coverage
Test: combined.info Lines: 0 6 0.0 %
Date: 2022-04-01 14:17:54 Functions: 0 0 -
Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : /*
       2                 :            :  * Copyright 2014 Cisco Systems, Inc.  All rights reserved.
       3                 :            :  *
       4                 :            :  * This program is free software; you may redistribute it and/or modify
       5                 :            :  * it under the terms of the GNU General Public License as published by
       6                 :            :  * the Free Software Foundation; version 2 of the License.
       7                 :            :  *
       8                 :            :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
       9                 :            :  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
      10                 :            :  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
      11                 :            :  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
      12                 :            :  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
      13                 :            :  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
      14                 :            :  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
      15                 :            :  * SOFTWARE.
      16                 :            :  */
      17                 :            : 
      18                 :            : #ifndef _WQ_ENET_DESC_H_
      19                 :            : #define _WQ_ENET_DESC_H_
      20                 :            : 
      21                 :            : /* Ethernet work queue descriptor: 16B */
      22                 :            : struct wq_enet_desc {
      23                 :            :         __le64 address;
      24                 :            :         __le16 length;
      25                 :            :         __le16 mss_loopback;
      26                 :            :         __le16 header_length_flags;
      27                 :            :         __le16 vlan_tag;
      28                 :            : };
      29                 :            : 
      30                 :            : #define WQ_ENET_ADDR_BITS               64
      31                 :            : #define WQ_ENET_LEN_BITS                14
      32                 :            : #define WQ_ENET_LEN_MASK                ((1 << WQ_ENET_LEN_BITS) - 1)
      33                 :            : #define WQ_ENET_MSS_BITS                14
      34                 :            : #define WQ_ENET_MSS_MASK                ((1 << WQ_ENET_MSS_BITS) - 1)
      35                 :            : #define WQ_ENET_MSS_SHIFT               2
      36                 :            : #define WQ_ENET_LOOPBACK_SHIFT          1
      37                 :            : #define WQ_ENET_HDRLEN_BITS             10
      38                 :            : #define WQ_ENET_HDRLEN_MASK             ((1 << WQ_ENET_HDRLEN_BITS) - 1)
      39                 :            : #define WQ_ENET_FLAGS_OM_BITS           2
      40                 :            : #define WQ_ENET_FLAGS_OM_MASK           ((1 << WQ_ENET_FLAGS_OM_BITS) - 1)
      41                 :            : #define WQ_ENET_FLAGS_EOP_SHIFT         12
      42                 :            : #define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT    13
      43                 :            : #define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT  14
      44                 :            : #define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT     15
      45                 :            : 
      46                 :            : #define WQ_ENET_OFFLOAD_MODE_CSUM       0
      47                 :            : #define WQ_ENET_OFFLOAD_MODE_RESERVED   1
      48                 :            : #define WQ_ENET_OFFLOAD_MODE_CSUM_L4    2
      49                 :            : #define WQ_ENET_OFFLOAD_MODE_TSO        3
      50                 :            : 
      51                 :          0 : static inline void wq_enet_desc_enc(struct wq_enet_desc *desc,
      52                 :            :         u64 address, u16 length, u16 mss, u16 header_length,
      53                 :            :         u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap,
      54                 :            :         u8 vlan_tag_insert, u16 vlan_tag, u8 loopback)
      55                 :            : {
      56                 :          0 :         desc->address = cpu_to_le64(address);
      57                 :          0 :         desc->length = cpu_to_le16(length & WQ_ENET_LEN_MASK);
      58                 :          0 :         desc->mss_loopback = cpu_to_le16((mss & WQ_ENET_MSS_MASK) <<
      59                 :            :                 WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT);
      60                 :          0 :         desc->header_length_flags = cpu_to_le16(
      61                 :            :                 (header_length & WQ_ENET_HDRLEN_MASK) |
      62                 :            :                 (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS |
      63                 :            :                 (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT |
      64                 :            :                 (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT |
      65                 :            :                 (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT |
      66                 :            :                 (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT);
      67                 :          0 :         desc->vlan_tag = cpu_to_le16(vlan_tag);
      68                 :            : }
      69                 :            : 
      70                 :            : static inline void wq_enet_desc_dec(struct wq_enet_desc *desc,
      71                 :            :         u64 *address, u16 *length, u16 *mss, u16 *header_length,
      72                 :            :         u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap,
      73                 :            :         u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback)
      74                 :            : {
      75                 :            :         *address = le64_to_cpu(desc->address);
      76                 :            :         *length = le16_to_cpu(desc->length) & WQ_ENET_LEN_MASK;
      77                 :            :         *mss = (le16_to_cpu(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) &
      78                 :            :                 WQ_ENET_MSS_MASK;
      79                 :            :         *loopback = (u8)((le16_to_cpu(desc->mss_loopback) >>
      80                 :            :                 WQ_ENET_LOOPBACK_SHIFT) & 1);
      81                 :            :         *header_length = le16_to_cpu(desc->header_length_flags) &
      82                 :            :                 WQ_ENET_HDRLEN_MASK;
      83                 :            :         *offload_mode = (u8)((le16_to_cpu(desc->header_length_flags) >>
      84                 :            :                 WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK);
      85                 :            :         *eop = (u8)((le16_to_cpu(desc->header_length_flags) >>
      86                 :            :                 WQ_ENET_FLAGS_EOP_SHIFT) & 1);
      87                 :            :         *cq_entry = (u8)((le16_to_cpu(desc->header_length_flags) >>
      88                 :            :                 WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1);
      89                 :            :         *fcoe_encap = (u8)((le16_to_cpu(desc->header_length_flags) >>
      90                 :            :                 WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1);
      91                 :            :         *vlan_tag_insert = (u8)((le16_to_cpu(desc->header_length_flags) >>
      92                 :            :                 WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1);
      93                 :            :         *vlan_tag = le16_to_cpu(desc->vlan_tag);
      94                 :            : }
      95                 :            : 
      96                 :            : #endif /* _WQ_ENET_DESC_H_ */

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