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47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
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/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright 2008-2017 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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#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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