1 /* 2 * Copyright 2008-2010 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 */ 19 20 #ifndef _RQ_ENET_DESC_H_ 21 #define _RQ_ENET_DESC_H_ 22 23 /* Ethernet receive queue descriptor: 16B */ 24 struct rq_enet_desc { 25 __le64 address; 26 __le16 length_type; 27 u8 reserved[6]; 28 }; 29 30 enum rq_enet_type_types { 31 RQ_ENET_TYPE_ONLY_SOP = 0, 32 RQ_ENET_TYPE_NOT_SOP = 1, 33 RQ_ENET_TYPE_RESV2 = 2, 34 RQ_ENET_TYPE_RESV3 = 3, 35 }; 36 37 #define RQ_ENET_ADDR_BITS 64 38 #define RQ_ENET_LEN_BITS 14 39 #define RQ_ENET_LEN_MASK ((1 << RQ_ENET_LEN_BITS) - 1) 40 #define RQ_ENET_TYPE_BITS 2 41 #define RQ_ENET_TYPE_MASK ((1 << RQ_ENET_TYPE_BITS) - 1) 42 43 static inline void rq_enet_desc_enc(struct rq_enet_desc *desc, 44 u64 address, u8 type, u16 length) 45 { 46 desc->address = cpu_to_le64(address); 47 desc->length_type = cpu_to_le16((length & RQ_ENET_LEN_MASK) | 48 ((type & RQ_ENET_TYPE_MASK) << RQ_ENET_LEN_BITS)); 49 } 50 51 static inline void rq_enet_desc_dec(struct rq_enet_desc *desc, 52 u64 *address, u8 *type, u16 *length) 53 { 54 *address = le64_to_cpu(desc->address); 55 *length = le16_to_cpu(desc->length_type) & RQ_ENET_LEN_MASK; 56 *type = (u8)((le16_to_cpu(desc->length_type) >> RQ_ENET_LEN_BITS) & 57 RQ_ENET_TYPE_MASK); 58 } 59 60 #endif /* _RQ_ENET_DESC_H_ */ 61