rq_enet_desc.h

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
 4 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 5 */
 6#ifndef _RQ_ENET_DESC_H_
 7#define _RQ_ENET_DESC_H_
 8
 9/* Ethernet receive queue descriptor: 16B */
10struct rq_enet_desc {
11	__le64 address;
12	__le16 length_type;
13	u8 reserved[6];
14};
15
16enum rq_enet_type_types {
17	RQ_ENET_TYPE_ONLY_SOP = 0,
18	RQ_ENET_TYPE_NOT_SOP = 1,
19	RQ_ENET_TYPE_RESV2 = 2,
20	RQ_ENET_TYPE_RESV3 = 3,
21};
22
23#define RQ_ENET_ADDR_BITS		64
24#define RQ_ENET_LEN_BITS		14
25#define RQ_ENET_LEN_MASK		((1 << RQ_ENET_LEN_BITS) - 1)
26#define RQ_ENET_TYPE_BITS		2
27#define RQ_ENET_TYPE_MASK		((1 << RQ_ENET_TYPE_BITS) - 1)
28
29static inline void rq_enet_desc_enc(struct rq_enet_desc *desc,
30	u64 address, u8 type, u16 length)
31{
32	desc->address = cpu_to_le64(address);
33	desc->length_type = cpu_to_le16((length & RQ_ENET_LEN_MASK) |
34		((type & RQ_ENET_TYPE_MASK) << RQ_ENET_LEN_BITS));
35}
36
37static inline void rq_enet_desc_dec(struct rq_enet_desc *desc,
38	u64 *address, u8 *type, u16 *length)
39{
40	*address = le64_to_cpu(desc->address);
41	*length = le16_to_cpu(desc->length_type) & RQ_ENET_LEN_MASK;
42	*type = (u8)((le16_to_cpu(desc->length_type) >> RQ_ENET_LEN_BITS) &
43		RQ_ENET_TYPE_MASK);
44}
45
46#endif /* _RQ_ENET_DESC_H_ */