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 _RQ_ENET_DESC_H_
19*4882a593Smuzhiyun #define _RQ_ENET_DESC_H_
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun /* Ethernet receive queue descriptor: 16B */
22*4882a593Smuzhiyun struct rq_enet_desc {
23*4882a593Smuzhiyun __le64 address;
24*4882a593Smuzhiyun __le16 length_type;
25*4882a593Smuzhiyun u8 reserved[6];
26*4882a593Smuzhiyun };
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun enum rq_enet_type_types {
29*4882a593Smuzhiyun RQ_ENET_TYPE_ONLY_SOP = 0,
30*4882a593Smuzhiyun RQ_ENET_TYPE_NOT_SOP = 1,
31*4882a593Smuzhiyun RQ_ENET_TYPE_RESV2 = 2,
32*4882a593Smuzhiyun RQ_ENET_TYPE_RESV3 = 3,
33*4882a593Smuzhiyun };
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun #define RQ_ENET_ADDR_BITS 64
36*4882a593Smuzhiyun #define RQ_ENET_LEN_BITS 14
37*4882a593Smuzhiyun #define RQ_ENET_LEN_MASK ((1 << RQ_ENET_LEN_BITS) - 1)
38*4882a593Smuzhiyun #define RQ_ENET_TYPE_BITS 2
39*4882a593Smuzhiyun #define RQ_ENET_TYPE_MASK ((1 << RQ_ENET_TYPE_BITS) - 1)
40*4882a593Smuzhiyun
rq_enet_desc_enc(struct rq_enet_desc * desc,u64 address,u8 type,u16 length)41*4882a593Smuzhiyun static inline void rq_enet_desc_enc(struct rq_enet_desc *desc,
42*4882a593Smuzhiyun u64 address, u8 type, u16 length)
43*4882a593Smuzhiyun {
44*4882a593Smuzhiyun desc->address = cpu_to_le64(address);
45*4882a593Smuzhiyun desc->length_type = cpu_to_le16((length & RQ_ENET_LEN_MASK) |
46*4882a593Smuzhiyun ((type & RQ_ENET_TYPE_MASK) << RQ_ENET_LEN_BITS));
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun
rq_enet_desc_dec(struct rq_enet_desc * desc,u64 * address,u8 * type,u16 * length)49*4882a593Smuzhiyun static inline void rq_enet_desc_dec(struct rq_enet_desc *desc,
50*4882a593Smuzhiyun u64 *address, u8 *type, u16 *length)
51*4882a593Smuzhiyun {
52*4882a593Smuzhiyun *address = le64_to_cpu(desc->address);
53*4882a593Smuzhiyun *length = le16_to_cpu(desc->length_type) & RQ_ENET_LEN_MASK;
54*4882a593Smuzhiyun *type = (u8)((le16_to_cpu(desc->length_type) >> RQ_ENET_LEN_BITS) &
55*4882a593Smuzhiyun RQ_ENET_TYPE_MASK);
56*4882a593Smuzhiyun }
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun #endif /* _RQ_ENET_DESC_H_ */
59