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1 | /* |
2 | * Copyright 2008 Cisco Systems, Inc. All rights reserved. | |
3 | * Copyright 2007 Nuova Systems, Inc. All rights reserved. | |
4 | * | |
5 | * This program is free software; you may redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; version 2 of the License. | |
8 | * | |
9 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
10 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
11 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
12 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
13 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
14 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
15 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
16 | * SOFTWARE. | |
17 | */ | |
18 | #ifndef _RQ_ENET_DESC_H_ | |
19 | #define _RQ_ENET_DESC_H_ | |
20 | ||
21 | /* Ethernet receive queue descriptor: 16B */ | |
22 | struct rq_enet_desc { | |
23 | __le64 address; | |
24 | __le16 length_type; | |
25 | u8 reserved[6]; | |
26 | }; | |
27 | ||
28 | enum rq_enet_type_types { | |
29 | RQ_ENET_TYPE_ONLY_SOP = 0, | |
30 | RQ_ENET_TYPE_NOT_SOP = 1, | |
31 | RQ_ENET_TYPE_RESV2 = 2, | |
32 | RQ_ENET_TYPE_RESV3 = 3, | |
33 | }; | |
34 | ||
35 | #define RQ_ENET_ADDR_BITS 64 | |
36 | #define RQ_ENET_LEN_BITS 14 | |
37 | #define RQ_ENET_LEN_MASK ((1 << RQ_ENET_LEN_BITS) - 1) | |
38 | #define RQ_ENET_TYPE_BITS 2 | |
39 | #define RQ_ENET_TYPE_MASK ((1 << RQ_ENET_TYPE_BITS) - 1) | |
40 | ||
41 | static inline void rq_enet_desc_enc(struct rq_enet_desc *desc, | |
42 | u64 address, u8 type, u16 length) | |
43 | { | |
44 | desc->address = cpu_to_le64(address); | |
45 | desc->length_type = cpu_to_le16((length & RQ_ENET_LEN_MASK) | | |
46 | ((type & RQ_ENET_TYPE_MASK) << RQ_ENET_LEN_BITS)); | |
47 | } | |
48 | ||
49 | static inline void rq_enet_desc_dec(struct rq_enet_desc *desc, | |
50 | u64 *address, u8 *type, u16 *length) | |
51 | { | |
52 | *address = le64_to_cpu(desc->address); | |
53 | *length = le16_to_cpu(desc->length_type) & RQ_ENET_LEN_MASK; | |
54 | *type = (u8)((le16_to_cpu(desc->length_type) >> RQ_ENET_LEN_BITS) & | |
55 | RQ_ENET_TYPE_MASK); | |
56 | } | |
57 | ||
58 | #endif /* _RQ_ENET_DESC_H_ */ |