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.
6 #ifndef _WQ_ENET_DESC_H_
7 #define _WQ_ENET_DESC_H_
9 #include <rte_byteorder.h>
11 /* Ethernet work queue descriptor: 16B */
16 __le16 header_length_flags;
20 #define WQ_ENET_ADDR_BITS 64
21 #define WQ_ENET_LEN_BITS 14
22 #define WQ_ENET_LEN_MASK ((1 << WQ_ENET_LEN_BITS) - 1)
23 #define WQ_ENET_MSS_BITS 14
24 #define WQ_ENET_MSS_MASK ((1 << WQ_ENET_MSS_BITS) - 1)
25 #define WQ_ENET_MSS_SHIFT 2
26 #define WQ_ENET_LOOPBACK_SHIFT 1
27 #define WQ_ENET_HDRLEN_BITS 10
28 #define WQ_ENET_HDRLEN_MASK ((1 << WQ_ENET_HDRLEN_BITS) - 1)
29 #define WQ_ENET_FLAGS_OM_BITS 2
30 #define WQ_ENET_FLAGS_OM_MASK ((1 << WQ_ENET_FLAGS_OM_BITS) - 1)
31 #define WQ_ENET_FLAGS_EOP_SHIFT 12
32 #define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT 13
33 #define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT 14
34 #define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT 15
36 #define WQ_ENET_OFFLOAD_MODE_CSUM 0
37 #define WQ_ENET_OFFLOAD_MODE_RESERVED 1
38 #define WQ_ENET_OFFLOAD_MODE_CSUM_L4 2
39 #define WQ_ENET_OFFLOAD_MODE_TSO 3
41 static inline void wq_enet_desc_enc(struct wq_enet_desc *desc,
42 u64 address, u16 length, u16 mss, u16 header_length,
43 u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap,
44 u8 vlan_tag_insert, u16 vlan_tag, u8 loopback)
46 desc->address = rte_cpu_to_le_64(address);
47 desc->length = rte_cpu_to_le_16(length & WQ_ENET_LEN_MASK);
48 desc->mss_loopback = rte_cpu_to_le_16((mss & WQ_ENET_MSS_MASK) <<
49 WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT);
50 desc->header_length_flags = rte_cpu_to_le_16
51 ((header_length & WQ_ENET_HDRLEN_MASK) |
52 (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS |
53 (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT |
54 (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT |
55 (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT |
56 (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT);
57 desc->vlan_tag = rte_cpu_to_le_16(vlan_tag);
60 static inline void wq_enet_desc_dec(struct wq_enet_desc *desc,
61 u64 *address, u16 *length, u16 *mss, u16 *header_length,
62 u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap,
63 u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback)
65 *address = rte_le_to_cpu_64(desc->address);
66 *length = rte_le_to_cpu_16(desc->length) & WQ_ENET_LEN_MASK;
67 *mss = (rte_le_to_cpu_16(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) &
69 *loopback = (u8)((rte_le_to_cpu_16(desc->mss_loopback) >>
70 WQ_ENET_LOOPBACK_SHIFT) & 1);
71 *header_length = rte_le_to_cpu_16(desc->header_length_flags) &
73 *offload_mode = (u8)((rte_le_to_cpu_16(desc->header_length_flags) >>
74 WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK);
75 *eop = (u8)((rte_le_to_cpu_16(desc->header_length_flags) >>
76 WQ_ENET_FLAGS_EOP_SHIFT) & 1);
77 *cq_entry = (u8)((rte_le_to_cpu_16(desc->header_length_flags) >>
78 WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1);
79 *fcoe_encap = (u8)((rte_le_to_cpu_16(desc->header_length_flags) >>
80 WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1);
81 *vlan_tag_insert = (u8)((rte_le_to_cpu_16(desc->header_length_flags) >>
82 WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1);
83 *vlan_tag = rte_le_to_cpu_16(desc->vlan_tag);
86 #endif /* _WQ_ENET_DESC_H_ */