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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 | */ | |
19 | ||
20 | #ifndef _WQ_ENET_DESC_H_ | |
21 | #define _WQ_ENET_DESC_H_ | |
22 | ||
23 | /* Ethernet work queue descriptor: 16B */ | |
24 | struct wq_enet_desc { | |
25 | __le64 address; | |
26 | __le16 length; | |
27 | __le16 mss_loopback; | |
28 | __le16 header_length_flags; | |
29 | __le16 vlan_tag; | |
30 | }; | |
31 | ||
32 | #define WQ_ENET_ADDR_BITS 64 | |
33 | #define WQ_ENET_LEN_BITS 14 | |
34 | #define WQ_ENET_LEN_MASK ((1 << WQ_ENET_LEN_BITS) - 1) | |
35 | #define WQ_ENET_MSS_BITS 14 | |
36 | #define WQ_ENET_MSS_MASK ((1 << WQ_ENET_MSS_BITS) - 1) | |
37 | #define WQ_ENET_MSS_SHIFT 2 | |
38 | #define WQ_ENET_LOOPBACK_SHIFT 1 | |
39 | #define WQ_ENET_HDRLEN_BITS 10 | |
40 | #define WQ_ENET_HDRLEN_MASK ((1 << WQ_ENET_HDRLEN_BITS) - 1) | |
41 | #define WQ_ENET_FLAGS_OM_BITS 2 | |
42 | #define WQ_ENET_FLAGS_OM_MASK ((1 << WQ_ENET_FLAGS_OM_BITS) - 1) | |
43 | #define WQ_ENET_FLAGS_EOP_SHIFT 12 | |
44 | #define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT 13 | |
45 | #define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT 14 | |
46 | #define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT 15 | |
47 | ||
48 | #define WQ_ENET_OFFLOAD_MODE_CSUM 0 | |
49 | #define WQ_ENET_OFFLOAD_MODE_RESERVED 1 | |
50 | #define WQ_ENET_OFFLOAD_MODE_CSUM_L4 2 | |
51 | #define WQ_ENET_OFFLOAD_MODE_TSO 3 | |
52 | ||
53 | static inline void wq_enet_desc_enc(struct wq_enet_desc *desc, | |
54 | u64 address, u16 length, u16 mss, u16 header_length, | |
55 | u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap, | |
56 | u8 vlan_tag_insert, u16 vlan_tag, u8 loopback) | |
57 | { | |
58 | desc->address = cpu_to_le64(address); | |
59 | desc->length = cpu_to_le16(length & WQ_ENET_LEN_MASK); | |
60 | desc->mss_loopback = cpu_to_le16((mss & WQ_ENET_MSS_MASK) << | |
61 | WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT); | |
62 | desc->header_length_flags = cpu_to_le16( | |
63 | (header_length & WQ_ENET_HDRLEN_MASK) | | |
64 | (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS | | |
65 | (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT | | |
66 | (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT | | |
67 | (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT | | |
68 | (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT); | |
69 | desc->vlan_tag = cpu_to_le16(vlan_tag); | |
70 | } | |
71 | ||
72 | static inline void wq_enet_desc_dec(struct wq_enet_desc *desc, | |
73 | u64 *address, u16 *length, u16 *mss, u16 *header_length, | |
74 | u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap, | |
75 | u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback) | |
76 | { | |
77 | *address = le64_to_cpu(desc->address); | |
78 | *length = le16_to_cpu(desc->length) & WQ_ENET_LEN_MASK; | |
79 | *mss = (le16_to_cpu(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) & | |
80 | WQ_ENET_MSS_MASK; | |
81 | *loopback = (u8)((le16_to_cpu(desc->mss_loopback) >> | |
82 | WQ_ENET_LOOPBACK_SHIFT) & 1); | |
83 | *header_length = le16_to_cpu(desc->header_length_flags) & | |
84 | WQ_ENET_HDRLEN_MASK; | |
85 | *offload_mode = (u8)((le16_to_cpu(desc->header_length_flags) >> | |
86 | WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK); | |
87 | *eop = (u8)((le16_to_cpu(desc->header_length_flags) >> | |
88 | WQ_ENET_FLAGS_EOP_SHIFT) & 1); | |
89 | *cq_entry = (u8)((le16_to_cpu(desc->header_length_flags) >> | |
90 | WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1); | |
91 | *fcoe_encap = (u8)((le16_to_cpu(desc->header_length_flags) >> | |
92 | WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1); | |
93 | *vlan_tag_insert = (u8)((le16_to_cpu(desc->header_length_flags) >> | |
94 | WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1); | |
95 | *vlan_tag = le16_to_cpu(desc->vlan_tag); | |
96 | } | |
97 | ||
98 | #endif /* _WQ_ENET_DESC_H_ */ |