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 _WQ_ENET_DESC_H_ |
8 | #define _WQ_ENET_DESC_H_ |
9 | |
10 | /* Ethernet work queue descriptor: 16B */ |
11 | struct wq_enet_desc { |
12 | __le64 address; |
13 | __le16 length; |
14 | __le16 mss_loopback; |
15 | __le16 ; |
16 | __le16 vlan_tag; |
17 | }; |
18 | |
19 | #define WQ_ENET_ADDR_BITS 64 |
20 | #define WQ_ENET_LEN_BITS 14 |
21 | #define WQ_ENET_LEN_MASK ((1 << WQ_ENET_LEN_BITS) - 1) |
22 | #define WQ_ENET_MSS_BITS 14 |
23 | #define WQ_ENET_MSS_MASK ((1 << WQ_ENET_MSS_BITS) - 1) |
24 | #define WQ_ENET_MSS_SHIFT 2 |
25 | #define WQ_ENET_LOOPBACK_SHIFT 1 |
26 | #define WQ_ENET_HDRLEN_BITS 10 |
27 | #define WQ_ENET_HDRLEN_MASK ((1 << WQ_ENET_HDRLEN_BITS) - 1) |
28 | #define WQ_ENET_FLAGS_OM_BITS 2 |
29 | #define WQ_ENET_FLAGS_OM_MASK ((1 << WQ_ENET_FLAGS_OM_BITS) - 1) |
30 | #define WQ_ENET_FLAGS_EOP_SHIFT 12 |
31 | #define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT 13 |
32 | #define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT 14 |
33 | #define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT 15 |
34 | |
35 | #define WQ_ENET_OFFLOAD_MODE_CSUM 0 |
36 | #define WQ_ENET_OFFLOAD_MODE_RESERVED 1 |
37 | #define WQ_ENET_OFFLOAD_MODE_CSUM_L4 2 |
38 | #define WQ_ENET_OFFLOAD_MODE_TSO 3 |
39 | |
40 | static inline void wq_enet_desc_enc(struct wq_enet_desc *desc, |
41 | u64 address, u16 length, u16 mss, u16 , |
42 | u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap, |
43 | u8 vlan_tag_insert, u16 vlan_tag, u8 loopback) |
44 | { |
45 | desc->address = cpu_to_le64(address); |
46 | desc->length = cpu_to_le16(length & WQ_ENET_LEN_MASK); |
47 | desc->mss_loopback = cpu_to_le16((mss & WQ_ENET_MSS_MASK) << |
48 | WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT); |
49 | desc->header_length_flags = cpu_to_le16( |
50 | (header_length & WQ_ENET_HDRLEN_MASK) | |
51 | (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS | |
52 | (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT | |
53 | (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT | |
54 | (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT | |
55 | (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT); |
56 | desc->vlan_tag = cpu_to_le16(vlan_tag); |
57 | } |
58 | |
59 | static inline void wq_enet_desc_dec(struct wq_enet_desc *desc, |
60 | u64 *address, u16 *length, u16 *mss, u16 *, |
61 | u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap, |
62 | u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback) |
63 | { |
64 | *address = le64_to_cpu(desc->address); |
65 | *length = le16_to_cpu(desc->length) & WQ_ENET_LEN_MASK; |
66 | *mss = (le16_to_cpu(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) & |
67 | WQ_ENET_MSS_MASK; |
68 | *loopback = (u8)((le16_to_cpu(desc->mss_loopback) >> |
69 | WQ_ENET_LOOPBACK_SHIFT) & 1); |
70 | *header_length = le16_to_cpu(desc->header_length_flags) & |
71 | WQ_ENET_HDRLEN_MASK; |
72 | *offload_mode = (u8)((le16_to_cpu(desc->header_length_flags) >> |
73 | WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK); |
74 | *eop = (u8)((le16_to_cpu(desc->header_length_flags) >> |
75 | WQ_ENET_FLAGS_EOP_SHIFT) & 1); |
76 | *cq_entry = (u8)((le16_to_cpu(desc->header_length_flags) >> |
77 | WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1); |
78 | *fcoe_encap = (u8)((le16_to_cpu(desc->header_length_flags) >> |
79 | WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1); |
80 | *vlan_tag_insert = (u8)((le16_to_cpu(desc->header_length_flags) >> |
81 | WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1); |
82 | *vlan_tag = le16_to_cpu(desc->vlan_tag); |
83 | } |
84 | |
85 | #endif /* _WQ_ENET_DESC_H_ */ |
86 | |