1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | /* |
3 | * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved. |
4 | * Copyright 2007 Nuova Systems, Inc. All rights reserved. |
5 | */ |
6 | |
7 | #ifndef _RQ_ENET_DESC_H_ |
8 | #define _RQ_ENET_DESC_H_ |
9 | |
10 | /* Ethernet receive queue descriptor: 16B */ |
11 | struct rq_enet_desc { |
12 | __le64 address; |
13 | __le16 length_type; |
14 | u8 reserved[6]; |
15 | }; |
16 | |
17 | enum rq_enet_type_types { |
18 | RQ_ENET_TYPE_ONLY_SOP = 0, |
19 | RQ_ENET_TYPE_NOT_SOP = 1, |
20 | RQ_ENET_TYPE_RESV2 = 2, |
21 | RQ_ENET_TYPE_RESV3 = 3, |
22 | }; |
23 | |
24 | #define RQ_ENET_ADDR_BITS 64 |
25 | #define RQ_ENET_LEN_BITS 14 |
26 | #define RQ_ENET_LEN_MASK ((1 << RQ_ENET_LEN_BITS) - 1) |
27 | #define RQ_ENET_TYPE_BITS 2 |
28 | #define RQ_ENET_TYPE_MASK ((1 << RQ_ENET_TYPE_BITS) - 1) |
29 | |
30 | static inline void rq_enet_desc_enc(struct rq_enet_desc *desc, |
31 | u64 address, u8 type, u16 length) |
32 | { |
33 | desc->address = cpu_to_le64(address); |
34 | desc->length_type = cpu_to_le16((length & RQ_ENET_LEN_MASK) | |
35 | ((type & RQ_ENET_TYPE_MASK) << RQ_ENET_LEN_BITS)); |
36 | } |
37 | |
38 | static inline void rq_enet_desc_dec(struct rq_enet_desc *desc, |
39 | u64 *address, u8 *type, u16 *length) |
40 | { |
41 | *address = le64_to_cpu(desc->address); |
42 | *length = le16_to_cpu(desc->length_type) & RQ_ENET_LEN_MASK; |
43 | *type = (u8)((le16_to_cpu(desc->length_type) >> RQ_ENET_LEN_BITS) & |
44 | RQ_ENET_TYPE_MASK); |
45 | } |
46 | |
47 | #endif /* _RQ_ENET_DESC_H_ */ |
48 | |