1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright 2008-2017 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
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
wq_enet_desc_enc(struct wq_enet_desc * desc,u64 address,u16 length,u16 mss,u16 header_length,u8 offload_mode,u8 eop,u8 cq_entry,u8 fcoe_encap,u8 vlan_tag_insert,u16 vlan_tag,u8 loopback)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
wq_enet_desc_dec(struct wq_enet_desc * desc,u64 * address,u16 * length,u16 * mss,u16 * header_length,u8 * offload_mode,u8 * eop,u8 * cq_entry,u8 * fcoe_encap,u8 * vlan_tag_insert,u16 * vlan_tag,u8 * loopback)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_ */
85