1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved. 4 * Copyright 2007 Nuova Systems, Inc. All rights reserved. 5 */ 6 7 #ifndef _RQ_ENET_DESC_H_ 8 #define _RQ_ENET_DESC_H_ 9 10 /* Ethernet receive queue descriptor: 16B */ 11 struct rq_enet_desc { 12 __le64 address; 13 __le16 length_type; 14 u8 reserved[6]; 15 }; 16 17 enum rq_enet_type_types { 18 RQ_ENET_TYPE_ONLY_SOP = 0, 19 RQ_ENET_TYPE_NOT_SOP = 1, 20 RQ_ENET_TYPE_RESV2 = 2, 21 RQ_ENET_TYPE_RESV3 = 3, 22 }; 23 24 #define RQ_ENET_ADDR_BITS 64 25 #define RQ_ENET_LEN_BITS 14 26 #define RQ_ENET_LEN_MASK ((1 << RQ_ENET_LEN_BITS) - 1) 27 #define RQ_ENET_TYPE_BITS 2 28 #define RQ_ENET_TYPE_MASK ((1 << RQ_ENET_TYPE_BITS) - 1) 29 30 static inline void rq_enet_desc_enc(struct rq_enet_desc *desc, 31 u64 address, u8 type, u16 length) 32 { 33 desc->address = cpu_to_le64(address); 34 desc->length_type = cpu_to_le16((length & RQ_ENET_LEN_MASK) | 35 ((type & RQ_ENET_TYPE_MASK) << RQ_ENET_LEN_BITS)); 36 } 37 38 static inline void rq_enet_desc_dec(struct rq_enet_desc *desc, 39 u64 *address, u8 *type, u16 *length) 40 { 41 *address = le64_to_cpu(desc->address); 42 *length = le16_to_cpu(desc->length_type) & RQ_ENET_LEN_MASK; 43 *type = (u8)((le16_to_cpu(desc->length_type) >> RQ_ENET_LEN_BITS) & 44 RQ_ENET_TYPE_MASK); 45 } 46 47 #endif /* _RQ_ENET_DESC_H_ */ 48