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1 | /* SPDX-License-Identifier: BSD-3-Clause |
2 | * Copyright 2008-2017 Cisco Systems, Inc. All rights reserved. | |
7c673cae | 3 | * Copyright 2007 Nuova Systems, Inc. All rights reserved. |
7c673cae FG |
4 | */ |
5 | ||
6 | #ifndef _WQ_ENET_DESC_H_ | |
7 | #define _WQ_ENET_DESC_H_ | |
8 | ||
9 | /* Ethernet work queue descriptor: 16B */ | |
10 | struct wq_enet_desc { | |
11 | __le64 address; | |
12 | __le16 length; | |
13 | __le16 mss_loopback; | |
14 | __le16 header_length_flags; | |
15 | __le16 vlan_tag; | |
16 | }; | |
17 | ||
18 | #define WQ_ENET_ADDR_BITS 64 | |
19 | #define WQ_ENET_LEN_BITS 14 | |
20 | #define WQ_ENET_LEN_MASK ((1 << WQ_ENET_LEN_BITS) - 1) | |
21 | #define WQ_ENET_MSS_BITS 14 | |
22 | #define WQ_ENET_MSS_MASK ((1 << WQ_ENET_MSS_BITS) - 1) | |
23 | #define WQ_ENET_MSS_SHIFT 2 | |
24 | #define WQ_ENET_LOOPBACK_SHIFT 1 | |
25 | #define WQ_ENET_HDRLEN_BITS 10 | |
26 | #define WQ_ENET_HDRLEN_MASK ((1 << WQ_ENET_HDRLEN_BITS) - 1) | |
27 | #define WQ_ENET_FLAGS_OM_BITS 2 | |
28 | #define WQ_ENET_FLAGS_OM_MASK ((1 << WQ_ENET_FLAGS_OM_BITS) - 1) | |
29 | #define WQ_ENET_FLAGS_EOP_SHIFT 12 | |
30 | #define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT 13 | |
31 | #define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT 14 | |
32 | #define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT 15 | |
33 | ||
34 | #define WQ_ENET_OFFLOAD_MODE_CSUM 0 | |
35 | #define WQ_ENET_OFFLOAD_MODE_RESERVED 1 | |
36 | #define WQ_ENET_OFFLOAD_MODE_CSUM_L4 2 | |
37 | #define WQ_ENET_OFFLOAD_MODE_TSO 3 | |
38 | ||
39 | static inline void wq_enet_desc_enc(struct wq_enet_desc *desc, | |
40 | u64 address, u16 length, u16 mss, u16 header_length, | |
41 | u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap, | |
42 | u8 vlan_tag_insert, u16 vlan_tag, u8 loopback) | |
43 | { | |
44 | desc->address = cpu_to_le64(address); | |
45 | desc->length = cpu_to_le16(length & WQ_ENET_LEN_MASK); | |
46 | desc->mss_loopback = cpu_to_le16((mss & WQ_ENET_MSS_MASK) << | |
47 | WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT); | |
48 | desc->header_length_flags = cpu_to_le16( | |
49 | (header_length & WQ_ENET_HDRLEN_MASK) | | |
50 | (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS | | |
51 | (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT | | |
52 | (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT | | |
53 | (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT | | |
54 | (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT); | |
55 | desc->vlan_tag = cpu_to_le16(vlan_tag); | |
56 | } | |
57 | ||
58 | static inline void wq_enet_desc_dec(struct wq_enet_desc *desc, | |
59 | u64 *address, u16 *length, u16 *mss, u16 *header_length, | |
60 | u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap, | |
61 | u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback) | |
62 | { | |
63 | *address = le64_to_cpu(desc->address); | |
64 | *length = le16_to_cpu(desc->length) & WQ_ENET_LEN_MASK; | |
65 | *mss = (le16_to_cpu(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) & | |
66 | WQ_ENET_MSS_MASK; | |
67 | *loopback = (u8)((le16_to_cpu(desc->mss_loopback) >> | |
68 | WQ_ENET_LOOPBACK_SHIFT) & 1); | |
69 | *header_length = le16_to_cpu(desc->header_length_flags) & | |
70 | WQ_ENET_HDRLEN_MASK; | |
71 | *offload_mode = (u8)((le16_to_cpu(desc->header_length_flags) >> | |
72 | WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK); | |
73 | *eop = (u8)((le16_to_cpu(desc->header_length_flags) >> | |
74 | WQ_ENET_FLAGS_EOP_SHIFT) & 1); | |
75 | *cq_entry = (u8)((le16_to_cpu(desc->header_length_flags) >> | |
76 | WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1); | |
77 | *fcoe_encap = (u8)((le16_to_cpu(desc->header_length_flags) >> | |
78 | WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1); | |
79 | *vlan_tag_insert = (u8)((le16_to_cpu(desc->header_length_flags) >> | |
80 | WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1); | |
81 | *vlan_tag = le16_to_cpu(desc->vlan_tag); | |
82 | } | |
83 | ||
84 | #endif /* _WQ_ENET_DESC_H_ */ |