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1 | /* |
2 | * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved. | |
3 | * Copyright 2007 Nuova Systems, Inc. All rights reserved. | |
4 | * | |
5 | * Copyright (c) 2014, Cisco Systems, Inc. | |
6 | * All rights reserved. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * | |
15 | * 2. Redistributions in binary form must reproduce the above copyright | |
16 | * notice, this list of conditions and the following disclaimer in | |
17 | * the documentation and/or other materials provided with the | |
18 | * distribution. | |
19 | * | |
20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
23 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
24 | * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | |
25 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
26 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
27 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |
28 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN | |
30 | * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
31 | * POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
35 | #ifndef _RQ_ENET_DESC_H_ | |
36 | #define _RQ_ENET_DESC_H_ | |
37 | ||
38 | /* Ethernet receive queue descriptor: 16B */ | |
39 | struct rq_enet_desc { | |
40 | __le64 address; | |
41 | __le16 length_type; | |
42 | u8 reserved[6]; | |
43 | }; | |
44 | ||
45 | enum rq_enet_type_types { | |
46 | RQ_ENET_TYPE_ONLY_SOP = 0, | |
47 | RQ_ENET_TYPE_NOT_SOP = 1, | |
48 | RQ_ENET_TYPE_RESV2 = 2, | |
49 | RQ_ENET_TYPE_RESV3 = 3, | |
50 | }; | |
51 | ||
52 | #define RQ_ENET_ADDR_BITS 64 | |
53 | #define RQ_ENET_LEN_BITS 14 | |
54 | #define RQ_ENET_LEN_MASK ((1 << RQ_ENET_LEN_BITS) - 1) | |
55 | #define RQ_ENET_TYPE_BITS 2 | |
56 | #define RQ_ENET_TYPE_MASK ((1 << RQ_ENET_TYPE_BITS) - 1) | |
57 | ||
58 | static inline void rq_enet_desc_enc(volatile struct rq_enet_desc *desc, | |
59 | u64 address, u8 type, u16 length) | |
60 | { | |
61 | desc->address = cpu_to_le64(address); | |
62 | desc->length_type = cpu_to_le16((length & RQ_ENET_LEN_MASK) | | |
63 | ((type & RQ_ENET_TYPE_MASK) << RQ_ENET_LEN_BITS)); | |
64 | } | |
65 | ||
66 | static inline void rq_enet_desc_dec(struct rq_enet_desc *desc, | |
67 | u64 *address, u8 *type, u16 *length) | |
68 | { | |
69 | *address = le64_to_cpu(desc->address); | |
70 | *length = le16_to_cpu(desc->length_type) & RQ_ENET_LEN_MASK; | |
71 | *type = (u8)((le16_to_cpu(desc->length_type) >> RQ_ENET_LEN_BITS) & | |
72 | RQ_ENET_TYPE_MASK); | |
73 | } | |
74 | ||
75 | #endif /* _RQ_ENET_DESC_H_ */ |