1/* 2 * Copyright 2008 Cisco Systems, Inc. All rights reserved. 3 * Copyright 2007 Nuova Systems, Inc. All rights reserved. 4 * 5 * This program is free software; you may redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; version 2 of the License. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 16 * SOFTWARE. 17 */ 18#ifndef _RQ_ENET_DESC_H_ 19#define _RQ_ENET_DESC_H_ 20 21/* Ethernet receive queue descriptor: 16B */ 22struct rq_enet_desc { 23 __le64 address; 24 __le16 length_type; 25 u8 reserved[6]; 26}; 27 28enum rq_enet_type_types { 29 RQ_ENET_TYPE_ONLY_SOP = 0, 30 RQ_ENET_TYPE_NOT_SOP = 1, 31 RQ_ENET_TYPE_RESV2 = 2, 32 RQ_ENET_TYPE_RESV3 = 3, 33}; 34 35#define RQ_ENET_ADDR_BITS 64 36#define RQ_ENET_LEN_BITS 14 37#define RQ_ENET_LEN_MASK ((1 << RQ_ENET_LEN_BITS) - 1) 38#define RQ_ENET_TYPE_BITS 2 39#define RQ_ENET_TYPE_MASK ((1 << RQ_ENET_TYPE_BITS) - 1) 40 41static inline void rq_enet_desc_enc(struct rq_enet_desc *desc, 42 u64 address, u8 type, u16 length) 43{ 44 desc->address = cpu_to_le64(address); 45 desc->length_type = cpu_to_le16((length & RQ_ENET_LEN_MASK) | 46 ((type & RQ_ENET_TYPE_MASK) << RQ_ENET_LEN_BITS)); 47} 48 49static inline void rq_enet_desc_dec(struct rq_enet_desc *desc, 50 u64 *address, u8 *type, u16 *length) 51{ 52 *address = le64_to_cpu(desc->address); 53 *length = le16_to_cpu(desc->length_type) & RQ_ENET_LEN_MASK; 54 *type = (u8)((le16_to_cpu(desc->length_type) >> RQ_ENET_LEN_BITS) & 55 RQ_ENET_TYPE_MASK); 56} 57 58#endif /* _RQ_ENET_DESC_H_ */ 59