1*dfb99b05SThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-only */
2*dfb99b05SThomas Gleixner /* Copyright 2014 Cisco Systems, Inc. All rights reserved. */
3c8806b6cSNarsimhulu Musini
4c8806b6cSNarsimhulu Musini #ifndef _WQ_ENET_DESC_H_
5c8806b6cSNarsimhulu Musini #define _WQ_ENET_DESC_H_
6c8806b6cSNarsimhulu Musini
7c8806b6cSNarsimhulu Musini /* Ethernet work queue descriptor: 16B */
8c8806b6cSNarsimhulu Musini struct wq_enet_desc {
9c8806b6cSNarsimhulu Musini __le64 address;
10c8806b6cSNarsimhulu Musini __le16 length;
11c8806b6cSNarsimhulu Musini __le16 mss_loopback;
12c8806b6cSNarsimhulu Musini __le16 header_length_flags;
13c8806b6cSNarsimhulu Musini __le16 vlan_tag;
14c8806b6cSNarsimhulu Musini };
15c8806b6cSNarsimhulu Musini
16c8806b6cSNarsimhulu Musini #define WQ_ENET_ADDR_BITS 64
17c8806b6cSNarsimhulu Musini #define WQ_ENET_LEN_BITS 14
18c8806b6cSNarsimhulu Musini #define WQ_ENET_LEN_MASK ((1 << WQ_ENET_LEN_BITS) - 1)
19c8806b6cSNarsimhulu Musini #define WQ_ENET_MSS_BITS 14
20c8806b6cSNarsimhulu Musini #define WQ_ENET_MSS_MASK ((1 << WQ_ENET_MSS_BITS) - 1)
21c8806b6cSNarsimhulu Musini #define WQ_ENET_MSS_SHIFT 2
22c8806b6cSNarsimhulu Musini #define WQ_ENET_LOOPBACK_SHIFT 1
23c8806b6cSNarsimhulu Musini #define WQ_ENET_HDRLEN_BITS 10
24c8806b6cSNarsimhulu Musini #define WQ_ENET_HDRLEN_MASK ((1 << WQ_ENET_HDRLEN_BITS) - 1)
25c8806b6cSNarsimhulu Musini #define WQ_ENET_FLAGS_OM_BITS 2
26c8806b6cSNarsimhulu Musini #define WQ_ENET_FLAGS_OM_MASK ((1 << WQ_ENET_FLAGS_OM_BITS) - 1)
27c8806b6cSNarsimhulu Musini #define WQ_ENET_FLAGS_EOP_SHIFT 12
28c8806b6cSNarsimhulu Musini #define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT 13
29c8806b6cSNarsimhulu Musini #define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT 14
30c8806b6cSNarsimhulu Musini #define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT 15
31c8806b6cSNarsimhulu Musini
32c8806b6cSNarsimhulu Musini #define WQ_ENET_OFFLOAD_MODE_CSUM 0
33c8806b6cSNarsimhulu Musini #define WQ_ENET_OFFLOAD_MODE_RESERVED 1
34c8806b6cSNarsimhulu Musini #define WQ_ENET_OFFLOAD_MODE_CSUM_L4 2
35c8806b6cSNarsimhulu Musini #define WQ_ENET_OFFLOAD_MODE_TSO 3
36c8806b6cSNarsimhulu Musini
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)37c8806b6cSNarsimhulu Musini static inline void wq_enet_desc_enc(struct wq_enet_desc *desc,
38c8806b6cSNarsimhulu Musini u64 address, u16 length, u16 mss, u16 header_length,
39c8806b6cSNarsimhulu Musini u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap,
40c8806b6cSNarsimhulu Musini u8 vlan_tag_insert, u16 vlan_tag, u8 loopback)
41c8806b6cSNarsimhulu Musini {
42c8806b6cSNarsimhulu Musini desc->address = cpu_to_le64(address);
43c8806b6cSNarsimhulu Musini desc->length = cpu_to_le16(length & WQ_ENET_LEN_MASK);
44c8806b6cSNarsimhulu Musini desc->mss_loopback = cpu_to_le16((mss & WQ_ENET_MSS_MASK) <<
45c8806b6cSNarsimhulu Musini WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT);
46c8806b6cSNarsimhulu Musini desc->header_length_flags = cpu_to_le16(
47c8806b6cSNarsimhulu Musini (header_length & WQ_ENET_HDRLEN_MASK) |
48c8806b6cSNarsimhulu Musini (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS |
49c8806b6cSNarsimhulu Musini (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT |
50c8806b6cSNarsimhulu Musini (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT |
51c8806b6cSNarsimhulu Musini (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT |
52c8806b6cSNarsimhulu Musini (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT);
53c8806b6cSNarsimhulu Musini desc->vlan_tag = cpu_to_le16(vlan_tag);
54c8806b6cSNarsimhulu Musini }
55c8806b6cSNarsimhulu Musini
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)56c8806b6cSNarsimhulu Musini static inline void wq_enet_desc_dec(struct wq_enet_desc *desc,
57c8806b6cSNarsimhulu Musini u64 *address, u16 *length, u16 *mss, u16 *header_length,
58c8806b6cSNarsimhulu Musini u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap,
59c8806b6cSNarsimhulu Musini u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback)
60c8806b6cSNarsimhulu Musini {
61c8806b6cSNarsimhulu Musini *address = le64_to_cpu(desc->address);
62c8806b6cSNarsimhulu Musini *length = le16_to_cpu(desc->length) & WQ_ENET_LEN_MASK;
63c8806b6cSNarsimhulu Musini *mss = (le16_to_cpu(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) &
64c8806b6cSNarsimhulu Musini WQ_ENET_MSS_MASK;
65c8806b6cSNarsimhulu Musini *loopback = (u8)((le16_to_cpu(desc->mss_loopback) >>
66c8806b6cSNarsimhulu Musini WQ_ENET_LOOPBACK_SHIFT) & 1);
67c8806b6cSNarsimhulu Musini *header_length = le16_to_cpu(desc->header_length_flags) &
68c8806b6cSNarsimhulu Musini WQ_ENET_HDRLEN_MASK;
69c8806b6cSNarsimhulu Musini *offload_mode = (u8)((le16_to_cpu(desc->header_length_flags) >>
70c8806b6cSNarsimhulu Musini WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK);
71c8806b6cSNarsimhulu Musini *eop = (u8)((le16_to_cpu(desc->header_length_flags) >>
72c8806b6cSNarsimhulu Musini WQ_ENET_FLAGS_EOP_SHIFT) & 1);
73c8806b6cSNarsimhulu Musini *cq_entry = (u8)((le16_to_cpu(desc->header_length_flags) >>
74c8806b6cSNarsimhulu Musini WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1);
75c8806b6cSNarsimhulu Musini *fcoe_encap = (u8)((le16_to_cpu(desc->header_length_flags) >>
76c8806b6cSNarsimhulu Musini WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1);
77c8806b6cSNarsimhulu Musini *vlan_tag_insert = (u8)((le16_to_cpu(desc->header_length_flags) >>
78c8806b6cSNarsimhulu Musini WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1);
79c8806b6cSNarsimhulu Musini *vlan_tag = le16_to_cpu(desc->vlan_tag);
80c8806b6cSNarsimhulu Musini }
81c8806b6cSNarsimhulu Musini
82c8806b6cSNarsimhulu Musini #endif /* _WQ_ENET_DESC_H_ */
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