mirror of https://github.com/F-Stack/f-stack.git
76 lines
2.6 KiB
C
76 lines
2.6 KiB
C
/*
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* Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
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* Copyright 2007 Nuova Systems, Inc. All rights reserved.
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*
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* Copyright (c) 2014, Cisco Systems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef _RQ_ENET_DESC_H_
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#define _RQ_ENET_DESC_H_
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/* Ethernet receive queue descriptor: 16B */
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struct rq_enet_desc {
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__le64 address;
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__le16 length_type;
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u8 reserved[6];
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};
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enum rq_enet_type_types {
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RQ_ENET_TYPE_ONLY_SOP = 0,
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RQ_ENET_TYPE_NOT_SOP = 1,
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RQ_ENET_TYPE_RESV2 = 2,
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RQ_ENET_TYPE_RESV3 = 3,
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};
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#define RQ_ENET_ADDR_BITS 64
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#define RQ_ENET_LEN_BITS 14
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#define RQ_ENET_LEN_MASK ((1 << RQ_ENET_LEN_BITS) - 1)
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#define RQ_ENET_TYPE_BITS 2
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#define RQ_ENET_TYPE_MASK ((1 << RQ_ENET_TYPE_BITS) - 1)
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static inline void rq_enet_desc_enc(volatile struct rq_enet_desc *desc,
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u64 address, u8 type, u16 length)
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{
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desc->address = cpu_to_le64(address);
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desc->length_type = cpu_to_le16((length & RQ_ENET_LEN_MASK) |
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((type & RQ_ENET_TYPE_MASK) << RQ_ENET_LEN_BITS));
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}
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static inline void rq_enet_desc_dec(struct rq_enet_desc *desc,
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u64 *address, u8 *type, u16 *length)
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{
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*address = le64_to_cpu(desc->address);
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*length = le16_to_cpu(desc->length_type) & RQ_ENET_LEN_MASK;
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*type = (u8)((le16_to_cpu(desc->length_type) >> RQ_ENET_LEN_BITS) &
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RQ_ENET_TYPE_MASK);
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}
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#endif /* _RQ_ENET_DESC_H_ */
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