1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright 2008-2017 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 */
5
6 #ifndef _RQ_ENET_DESC_H_
7 #define _RQ_ENET_DESC_H_
8
9 /* Ethernet receive queue descriptor: 16B */
10 struct rq_enet_desc {
11 __le64 address;
12 __le16 length_type;
13 u8 reserved[6];
14 };
15
16 enum 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
rq_enet_desc_enc(volatile struct rq_enet_desc * desc,u64 address,u8 type,u16 length)29 static inline void rq_enet_desc_enc(volatile 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
rq_enet_desc_dec(struct rq_enet_desc * desc,u64 * address,u8 * type,u16 * length)37 static 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_ */
47