1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* Copyright 2014 Cisco Systems, Inc. All rights reserved. */
3
4 #ifndef _WQ_ENET_DESC_H_
5 #define _WQ_ENET_DESC_H_
6
7 /* Ethernet work queue descriptor: 16B */
8 struct wq_enet_desc {
9 __le64 address;
10 __le16 length;
11 __le16 mss_loopback;
12 __le16 header_length_flags;
13 __le16 vlan_tag;
14 };
15
16 #define WQ_ENET_ADDR_BITS 64
17 #define WQ_ENET_LEN_BITS 14
18 #define WQ_ENET_LEN_MASK ((1 << WQ_ENET_LEN_BITS) - 1)
19 #define WQ_ENET_MSS_BITS 14
20 #define WQ_ENET_MSS_MASK ((1 << WQ_ENET_MSS_BITS) - 1)
21 #define WQ_ENET_MSS_SHIFT 2
22 #define WQ_ENET_LOOPBACK_SHIFT 1
23 #define WQ_ENET_HDRLEN_BITS 10
24 #define WQ_ENET_HDRLEN_MASK ((1 << WQ_ENET_HDRLEN_BITS) - 1)
25 #define WQ_ENET_FLAGS_OM_BITS 2
26 #define WQ_ENET_FLAGS_OM_MASK ((1 << WQ_ENET_FLAGS_OM_BITS) - 1)
27 #define WQ_ENET_FLAGS_EOP_SHIFT 12
28 #define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT 13
29 #define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT 14
30 #define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT 15
31
32 #define WQ_ENET_OFFLOAD_MODE_CSUM 0
33 #define WQ_ENET_OFFLOAD_MODE_RESERVED 1
34 #define WQ_ENET_OFFLOAD_MODE_CSUM_L4 2
35 #define WQ_ENET_OFFLOAD_MODE_TSO 3
36
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)37 static inline void wq_enet_desc_enc(struct wq_enet_desc *desc,
38 u64 address, u16 length, u16 mss, u16 header_length,
39 u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap,
40 u8 vlan_tag_insert, u16 vlan_tag, u8 loopback)
41 {
42 desc->address = cpu_to_le64(address);
43 desc->length = cpu_to_le16(length & WQ_ENET_LEN_MASK);
44 desc->mss_loopback = cpu_to_le16((mss & WQ_ENET_MSS_MASK) <<
45 WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT);
46 desc->header_length_flags = cpu_to_le16(
47 (header_length & WQ_ENET_HDRLEN_MASK) |
48 (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS |
49 (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT |
50 (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT |
51 (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT |
52 (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT);
53 desc->vlan_tag = cpu_to_le16(vlan_tag);
54 }
55
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)56 static inline void wq_enet_desc_dec(struct wq_enet_desc *desc,
57 u64 *address, u16 *length, u16 *mss, u16 *header_length,
58 u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap,
59 u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback)
60 {
61 *address = le64_to_cpu(desc->address);
62 *length = le16_to_cpu(desc->length) & WQ_ENET_LEN_MASK;
63 *mss = (le16_to_cpu(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) &
64 WQ_ENET_MSS_MASK;
65 *loopback = (u8)((le16_to_cpu(desc->mss_loopback) >>
66 WQ_ENET_LOOPBACK_SHIFT) & 1);
67 *header_length = le16_to_cpu(desc->header_length_flags) &
68 WQ_ENET_HDRLEN_MASK;
69 *offload_mode = (u8)((le16_to_cpu(desc->header_length_flags) >>
70 WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK);
71 *eop = (u8)((le16_to_cpu(desc->header_length_flags) >>
72 WQ_ENET_FLAGS_EOP_SHIFT) & 1);
73 *cq_entry = (u8)((le16_to_cpu(desc->header_length_flags) >>
74 WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1);
75 *fcoe_encap = (u8)((le16_to_cpu(desc->header_length_flags) >>
76 WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1);
77 *vlan_tag_insert = (u8)((le16_to_cpu(desc->header_length_flags) >>
78 WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1);
79 *vlan_tag = le16_to_cpu(desc->vlan_tag);
80 }
81
82 #endif /* _WQ_ENET_DESC_H_ */
83