1*e6550b3eSThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-only */
2a6a5580cSJeff Kirsher /*
3a6a5580cSJeff Kirsher * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
4a6a5580cSJeff Kirsher * Copyright 2007 Nuova Systems, Inc. All rights reserved.
5a6a5580cSJeff Kirsher */
6a6a5580cSJeff Kirsher
7a6a5580cSJeff Kirsher #ifndef _WQ_ENET_DESC_H_
8a6a5580cSJeff Kirsher #define _WQ_ENET_DESC_H_
9a6a5580cSJeff Kirsher
10a6a5580cSJeff Kirsher /* Ethernet work queue descriptor: 16B */
11a6a5580cSJeff Kirsher struct wq_enet_desc {
12a6a5580cSJeff Kirsher __le64 address;
13a6a5580cSJeff Kirsher __le16 length;
14a6a5580cSJeff Kirsher __le16 mss_loopback;
15a6a5580cSJeff Kirsher __le16 header_length_flags;
16a6a5580cSJeff Kirsher __le16 vlan_tag;
17a6a5580cSJeff Kirsher };
18a6a5580cSJeff Kirsher
19a6a5580cSJeff Kirsher #define WQ_ENET_ADDR_BITS 64
20a6a5580cSJeff Kirsher #define WQ_ENET_LEN_BITS 14
21a6a5580cSJeff Kirsher #define WQ_ENET_LEN_MASK ((1 << WQ_ENET_LEN_BITS) - 1)
22a6a5580cSJeff Kirsher #define WQ_ENET_MSS_BITS 14
23a6a5580cSJeff Kirsher #define WQ_ENET_MSS_MASK ((1 << WQ_ENET_MSS_BITS) - 1)
24a6a5580cSJeff Kirsher #define WQ_ENET_MSS_SHIFT 2
25a6a5580cSJeff Kirsher #define WQ_ENET_LOOPBACK_SHIFT 1
26a6a5580cSJeff Kirsher #define WQ_ENET_HDRLEN_BITS 10
27a6a5580cSJeff Kirsher #define WQ_ENET_HDRLEN_MASK ((1 << WQ_ENET_HDRLEN_BITS) - 1)
28a6a5580cSJeff Kirsher #define WQ_ENET_FLAGS_OM_BITS 2
29a6a5580cSJeff Kirsher #define WQ_ENET_FLAGS_OM_MASK ((1 << WQ_ENET_FLAGS_OM_BITS) - 1)
30a6a5580cSJeff Kirsher #define WQ_ENET_FLAGS_EOP_SHIFT 12
31a6a5580cSJeff Kirsher #define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT 13
32a6a5580cSJeff Kirsher #define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT 14
33a6a5580cSJeff Kirsher #define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT 15
34a6a5580cSJeff Kirsher
35a6a5580cSJeff Kirsher #define WQ_ENET_OFFLOAD_MODE_CSUM 0
36a6a5580cSJeff Kirsher #define WQ_ENET_OFFLOAD_MODE_RESERVED 1
37a6a5580cSJeff Kirsher #define WQ_ENET_OFFLOAD_MODE_CSUM_L4 2
38a6a5580cSJeff Kirsher #define WQ_ENET_OFFLOAD_MODE_TSO 3
39a6a5580cSJeff Kirsher
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)40a6a5580cSJeff Kirsher static inline void wq_enet_desc_enc(struct wq_enet_desc *desc,
41a6a5580cSJeff Kirsher u64 address, u16 length, u16 mss, u16 header_length,
42a6a5580cSJeff Kirsher u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap,
43a6a5580cSJeff Kirsher u8 vlan_tag_insert, u16 vlan_tag, u8 loopback)
44a6a5580cSJeff Kirsher {
45a6a5580cSJeff Kirsher desc->address = cpu_to_le64(address);
46a6a5580cSJeff Kirsher desc->length = cpu_to_le16(length & WQ_ENET_LEN_MASK);
47a6a5580cSJeff Kirsher desc->mss_loopback = cpu_to_le16((mss & WQ_ENET_MSS_MASK) <<
48a6a5580cSJeff Kirsher WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT);
49a6a5580cSJeff Kirsher desc->header_length_flags = cpu_to_le16(
50a6a5580cSJeff Kirsher (header_length & WQ_ENET_HDRLEN_MASK) |
51a6a5580cSJeff Kirsher (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS |
52a6a5580cSJeff Kirsher (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT |
53a6a5580cSJeff Kirsher (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT |
54a6a5580cSJeff Kirsher (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT |
55a6a5580cSJeff Kirsher (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT);
56a6a5580cSJeff Kirsher desc->vlan_tag = cpu_to_le16(vlan_tag);
57a6a5580cSJeff Kirsher }
58a6a5580cSJeff Kirsher
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)59a6a5580cSJeff Kirsher static inline void wq_enet_desc_dec(struct wq_enet_desc *desc,
60a6a5580cSJeff Kirsher u64 *address, u16 *length, u16 *mss, u16 *header_length,
61a6a5580cSJeff Kirsher u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap,
62a6a5580cSJeff Kirsher u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback)
63a6a5580cSJeff Kirsher {
64a6a5580cSJeff Kirsher *address = le64_to_cpu(desc->address);
65a6a5580cSJeff Kirsher *length = le16_to_cpu(desc->length) & WQ_ENET_LEN_MASK;
66a6a5580cSJeff Kirsher *mss = (le16_to_cpu(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) &
67a6a5580cSJeff Kirsher WQ_ENET_MSS_MASK;
68a6a5580cSJeff Kirsher *loopback = (u8)((le16_to_cpu(desc->mss_loopback) >>
69a6a5580cSJeff Kirsher WQ_ENET_LOOPBACK_SHIFT) & 1);
70a6a5580cSJeff Kirsher *header_length = le16_to_cpu(desc->header_length_flags) &
71a6a5580cSJeff Kirsher WQ_ENET_HDRLEN_MASK;
72a6a5580cSJeff Kirsher *offload_mode = (u8)((le16_to_cpu(desc->header_length_flags) >>
73a6a5580cSJeff Kirsher WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK);
74a6a5580cSJeff Kirsher *eop = (u8)((le16_to_cpu(desc->header_length_flags) >>
75a6a5580cSJeff Kirsher WQ_ENET_FLAGS_EOP_SHIFT) & 1);
76a6a5580cSJeff Kirsher *cq_entry = (u8)((le16_to_cpu(desc->header_length_flags) >>
77a6a5580cSJeff Kirsher WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1);
78a6a5580cSJeff Kirsher *fcoe_encap = (u8)((le16_to_cpu(desc->header_length_flags) >>
79a6a5580cSJeff Kirsher WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1);
80a6a5580cSJeff Kirsher *vlan_tag_insert = (u8)((le16_to_cpu(desc->header_length_flags) >>
81a6a5580cSJeff Kirsher WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1);
82a6a5580cSJeff Kirsher *vlan_tag = le16_to_cpu(desc->vlan_tag);
83a6a5580cSJeff Kirsher }
84a6a5580cSJeff Kirsher
85a6a5580cSJeff Kirsher #endif /* _WQ_ENET_DESC_H_ */
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