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https://github.com/freebsd/freebsd-src
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9c067b844f
This driver is based of the enic (Cisco VIC) DPDK driver. It provides basic ethernet functionality. Has been run with various VIC cards to do UEFI PXE boot with NFS root.
47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
/* 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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