1 /*
2 * Copyright 2014 Cisco Systems, Inc. All rights reserved.
3 *
4 * This program is free software; you may redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
15 * SOFTWARE.
16 */
17
18 #ifndef _WQ_ENET_DESC_H_
19 #define _WQ_ENET_DESC_H_
20
21 /* Ethernet work queue descriptor: 16B */
22 struct wq_enet_desc {
23 __le64 address;
24 __le16 length;
25 __le16 mss_loopback;
26 __le16 header_length_flags;
27 __le16 vlan_tag;
28 };
29
30 #define WQ_ENET_ADDR_BITS 64
31 #define WQ_ENET_LEN_BITS 14
32 #define WQ_ENET_LEN_MASK ((1 << WQ_ENET_LEN_BITS) - 1)
33 #define WQ_ENET_MSS_BITS 14
34 #define WQ_ENET_MSS_MASK ((1 << WQ_ENET_MSS_BITS) - 1)
35 #define WQ_ENET_MSS_SHIFT 2
36 #define WQ_ENET_LOOPBACK_SHIFT 1
37 #define WQ_ENET_HDRLEN_BITS 10
38 #define WQ_ENET_HDRLEN_MASK ((1 << WQ_ENET_HDRLEN_BITS) - 1)
39 #define WQ_ENET_FLAGS_OM_BITS 2
40 #define WQ_ENET_FLAGS_OM_MASK ((1 << WQ_ENET_FLAGS_OM_BITS) - 1)
41 #define WQ_ENET_FLAGS_EOP_SHIFT 12
42 #define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT 13
43 #define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT 14
44 #define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT 15
45
46 #define WQ_ENET_OFFLOAD_MODE_CSUM 0
47 #define WQ_ENET_OFFLOAD_MODE_RESERVED 1
48 #define WQ_ENET_OFFLOAD_MODE_CSUM_L4 2
49 #define WQ_ENET_OFFLOAD_MODE_TSO 3
50
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)51 static inline void wq_enet_desc_enc(struct wq_enet_desc *desc,
52 u64 address, u16 length, u16 mss, u16 header_length,
53 u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap,
54 u8 vlan_tag_insert, u16 vlan_tag, u8 loopback)
55 {
56 desc->address = cpu_to_le64(address);
57 desc->length = cpu_to_le16(length & WQ_ENET_LEN_MASK);
58 desc->mss_loopback = cpu_to_le16((mss & WQ_ENET_MSS_MASK) <<
59 WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT);
60 desc->header_length_flags = cpu_to_le16(
61 (header_length & WQ_ENET_HDRLEN_MASK) |
62 (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS |
63 (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT |
64 (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT |
65 (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT |
66 (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT);
67 desc->vlan_tag = cpu_to_le16(vlan_tag);
68 }
69
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)70 static inline void wq_enet_desc_dec(struct wq_enet_desc *desc,
71 u64 *address, u16 *length, u16 *mss, u16 *header_length,
72 u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap,
73 u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback)
74 {
75 *address = le64_to_cpu(desc->address);
76 *length = le16_to_cpu(desc->length) & WQ_ENET_LEN_MASK;
77 *mss = (le16_to_cpu(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) &
78 WQ_ENET_MSS_MASK;
79 *loopback = (u8)((le16_to_cpu(desc->mss_loopback) >>
80 WQ_ENET_LOOPBACK_SHIFT) & 1);
81 *header_length = le16_to_cpu(desc->header_length_flags) &
82 WQ_ENET_HDRLEN_MASK;
83 *offload_mode = (u8)((le16_to_cpu(desc->header_length_flags) >>
84 WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK);
85 *eop = (u8)((le16_to_cpu(desc->header_length_flags) >>
86 WQ_ENET_FLAGS_EOP_SHIFT) & 1);
87 *cq_entry = (u8)((le16_to_cpu(desc->header_length_flags) >>
88 WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1);
89 *fcoe_encap = (u8)((le16_to_cpu(desc->header_length_flags) >>
90 WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1);
91 *vlan_tag_insert = (u8)((le16_to_cpu(desc->header_length_flags) >>
92 WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1);
93 *vlan_tag = le16_to_cpu(desc->vlan_tag);
94 }
95
96 #endif /* _WQ_ENET_DESC_H_ */
97
