1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3*4882a593Smuzhiyun * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * This program is free software; you may redistribute it and/or modify
6*4882a593Smuzhiyun * it under the terms of the GNU General Public License as published by
7*4882a593Smuzhiyun * the Free Software Foundation; version 2 of the License.
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10*4882a593Smuzhiyun * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11*4882a593Smuzhiyun * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12*4882a593Smuzhiyun * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13*4882a593Smuzhiyun * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14*4882a593Smuzhiyun * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15*4882a593Smuzhiyun * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16*4882a593Smuzhiyun * SOFTWARE.
17*4882a593Smuzhiyun */
18*4882a593Smuzhiyun #ifndef _WQ_ENET_DESC_H_
19*4882a593Smuzhiyun #define _WQ_ENET_DESC_H_
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun /* Ethernet work queue descriptor: 16B */
22*4882a593Smuzhiyun struct wq_enet_desc {
23*4882a593Smuzhiyun __le64 address;
24*4882a593Smuzhiyun __le16 length;
25*4882a593Smuzhiyun __le16 mss_loopback;
26*4882a593Smuzhiyun __le16 header_length_flags;
27*4882a593Smuzhiyun __le16 vlan_tag;
28*4882a593Smuzhiyun };
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun #define WQ_ENET_ADDR_BITS 64
31*4882a593Smuzhiyun #define WQ_ENET_LEN_BITS 14
32*4882a593Smuzhiyun #define WQ_ENET_LEN_MASK ((1 << WQ_ENET_LEN_BITS) - 1)
33*4882a593Smuzhiyun #define WQ_ENET_MSS_BITS 14
34*4882a593Smuzhiyun #define WQ_ENET_MSS_MASK ((1 << WQ_ENET_MSS_BITS) - 1)
35*4882a593Smuzhiyun #define WQ_ENET_MSS_SHIFT 2
36*4882a593Smuzhiyun #define WQ_ENET_LOOPBACK_SHIFT 1
37*4882a593Smuzhiyun #define WQ_ENET_HDRLEN_BITS 10
38*4882a593Smuzhiyun #define WQ_ENET_HDRLEN_MASK ((1 << WQ_ENET_HDRLEN_BITS) - 1)
39*4882a593Smuzhiyun #define WQ_ENET_FLAGS_OM_BITS 2
40*4882a593Smuzhiyun #define WQ_ENET_FLAGS_OM_MASK ((1 << WQ_ENET_FLAGS_OM_BITS) - 1)
41*4882a593Smuzhiyun #define WQ_ENET_FLAGS_EOP_SHIFT 12
42*4882a593Smuzhiyun #define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT 13
43*4882a593Smuzhiyun #define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT 14
44*4882a593Smuzhiyun #define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT 15
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun #define WQ_ENET_OFFLOAD_MODE_CSUM 0
47*4882a593Smuzhiyun #define WQ_ENET_OFFLOAD_MODE_RESERVED 1
48*4882a593Smuzhiyun #define WQ_ENET_OFFLOAD_MODE_CSUM_L4 2
49*4882a593Smuzhiyun #define WQ_ENET_OFFLOAD_MODE_TSO 3
50*4882a593Smuzhiyun
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*4882a593Smuzhiyun static inline void wq_enet_desc_enc(struct wq_enet_desc *desc,
52*4882a593Smuzhiyun u64 address, u16 length, u16 mss, u16 header_length,
53*4882a593Smuzhiyun u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap,
54*4882a593Smuzhiyun u8 vlan_tag_insert, u16 vlan_tag, u8 loopback)
55*4882a593Smuzhiyun {
56*4882a593Smuzhiyun desc->address = cpu_to_le64(address);
57*4882a593Smuzhiyun desc->length = cpu_to_le16(length & WQ_ENET_LEN_MASK);
58*4882a593Smuzhiyun desc->mss_loopback = cpu_to_le16((mss & WQ_ENET_MSS_MASK) <<
59*4882a593Smuzhiyun WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT);
60*4882a593Smuzhiyun desc->header_length_flags = cpu_to_le16(
61*4882a593Smuzhiyun (header_length & WQ_ENET_HDRLEN_MASK) |
62*4882a593Smuzhiyun (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS |
63*4882a593Smuzhiyun (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT |
64*4882a593Smuzhiyun (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT |
65*4882a593Smuzhiyun (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT |
66*4882a593Smuzhiyun (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT);
67*4882a593Smuzhiyun desc->vlan_tag = cpu_to_le16(vlan_tag);
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun
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*4882a593Smuzhiyun static inline void wq_enet_desc_dec(struct wq_enet_desc *desc,
71*4882a593Smuzhiyun u64 *address, u16 *length, u16 *mss, u16 *header_length,
72*4882a593Smuzhiyun u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap,
73*4882a593Smuzhiyun u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback)
74*4882a593Smuzhiyun {
75*4882a593Smuzhiyun *address = le64_to_cpu(desc->address);
76*4882a593Smuzhiyun *length = le16_to_cpu(desc->length) & WQ_ENET_LEN_MASK;
77*4882a593Smuzhiyun *mss = (le16_to_cpu(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) &
78*4882a593Smuzhiyun WQ_ENET_MSS_MASK;
79*4882a593Smuzhiyun *loopback = (u8)((le16_to_cpu(desc->mss_loopback) >>
80*4882a593Smuzhiyun WQ_ENET_LOOPBACK_SHIFT) & 1);
81*4882a593Smuzhiyun *header_length = le16_to_cpu(desc->header_length_flags) &
82*4882a593Smuzhiyun WQ_ENET_HDRLEN_MASK;
83*4882a593Smuzhiyun *offload_mode = (u8)((le16_to_cpu(desc->header_length_flags) >>
84*4882a593Smuzhiyun WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK);
85*4882a593Smuzhiyun *eop = (u8)((le16_to_cpu(desc->header_length_flags) >>
86*4882a593Smuzhiyun WQ_ENET_FLAGS_EOP_SHIFT) & 1);
87*4882a593Smuzhiyun *cq_entry = (u8)((le16_to_cpu(desc->header_length_flags) >>
88*4882a593Smuzhiyun WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1);
89*4882a593Smuzhiyun *fcoe_encap = (u8)((le16_to_cpu(desc->header_length_flags) >>
90*4882a593Smuzhiyun WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1);
91*4882a593Smuzhiyun *vlan_tag_insert = (u8)((le16_to_cpu(desc->header_length_flags) >>
92*4882a593Smuzhiyun WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1);
93*4882a593Smuzhiyun *vlan_tag = le16_to_cpu(desc->vlan_tag);
94*4882a593Smuzhiyun }
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun #endif /* _WQ_ENET_DESC_H_ */
97