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
rq_enet_desc_enc(struct rq_enet_desc * desc,u64 address,u8 type,u16 length)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
rq_enet_desc_dec(struct rq_enet_desc * desc,u64 * address,u8 * type,u16 * length)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