ceph/src/dpdk/drivers/net/enic/base/rq_enet_desc.h

   1 /*
   2  * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * Copyright (c) 2014, Cisco Systems, Inc.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  * notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  * notice, this list of conditions and the following disclaimer in
  17  * the documentation and/or other materials provided with the
  18  * distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  23  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  24  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  26  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  28  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  30  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  31  * POSSIBILITY OF SUCH DAMAGE.
  32  *
  33  */
  34
  35 #ifndef _RQ_ENET_DESC_H_
  36 #define _RQ_ENET_DESC_H_
  37
  38 /* Ethernet receive queue descriptor: 16B */
  39 struct rq_enet_desc {
  40         __le64 address;
  41         __le16 length_type;
  42         u8 reserved[6];
  43 };
  44
  45 enum rq_enet_type_types {
  46         RQ_ENET_TYPE_ONLY_SOP = 0,
  47         RQ_ENET_TYPE_NOT_SOP = 1,
  48         RQ_ENET_TYPE_RESV2 = 2,
  49         RQ_ENET_TYPE_RESV3 = 3,
  50 };
  51
  52 #define RQ_ENET_ADDR_BITS               64
  53 #define RQ_ENET_LEN_BITS                14
  54 #define RQ_ENET_LEN_MASK                ((1 << RQ_ENET_LEN_BITS) - 1)
  55 #define RQ_ENET_TYPE_BITS               2
  56 #define RQ_ENET_TYPE_MASK               ((1 << RQ_ENET_TYPE_BITS) - 1)
  57
  58 static inline void rq_enet_desc_enc(volatile struct rq_enet_desc *desc,
  59         u64 address, u8 type, u16 length)
  60 {
  61         desc->address = cpu_to_le64(address);
  62         desc->length_type = cpu_to_le16((length & RQ_ENET_LEN_MASK) |
  63                 ((type & RQ_ENET_TYPE_MASK) << RQ_ENET_LEN_BITS));
  64 }
  65
  66 static inline void rq_enet_desc_dec(struct rq_enet_desc *desc,
  67         u64 *address, u8 *type, u16 *length)
  68 {
  69         *address = le64_to_cpu(desc->address);
  70         *length = le16_to_cpu(desc->length_type) & RQ_ENET_LEN_MASK;
  71         *type = (u8)((le16_to_cpu(desc->length_type) >> RQ_ENET_LEN_BITS) &
  72                 RQ_ENET_TYPE_MASK);
  73 }
  74
  75 #endif /* _RQ_ENET_DESC_H_ */