1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright 2008-2017 Cisco Systems, Inc. All rights reserved. 3 * Copyright 2007 Nuova Systems, Inc. All rights reserved. 4 */ 5 6 #ifndef _RQ_ENET_DESC_H_ 7 #define _RQ_ENET_DESC_H_ 8 9 /* Ethernet receive queue descriptor: 16B */ 10 struct rq_enet_desc { 11 __le64 address; 12 __le16 length_type; 13 u8 reserved[6]; 14 }; 15 16 enum rq_enet_type_types { 17 RQ_ENET_TYPE_ONLY_SOP = 0, 18 RQ_ENET_TYPE_NOT_SOP = 1, 19 RQ_ENET_TYPE_RESV2 = 2, 20 RQ_ENET_TYPE_RESV3 = 3, 21 }; 22 23 #define RQ_ENET_ADDR_BITS 64 24 #define RQ_ENET_LEN_BITS 14 25 #define RQ_ENET_LEN_MASK ((1 << RQ_ENET_LEN_BITS) - 1) 26 #define RQ_ENET_TYPE_BITS 2 27 #define RQ_ENET_TYPE_MASK ((1 << RQ_ENET_TYPE_BITS) - 1) 28 29 static inline void rq_enet_desc_enc(volatile struct rq_enet_desc *desc, 30 u64 address, u8 type, u16 length) 31 { 32 desc->address = cpu_to_le64(address); 33 desc->length_type = cpu_to_le16((length & RQ_ENET_LEN_MASK) | 34 ((type & RQ_ENET_TYPE_MASK) << RQ_ENET_LEN_BITS)); 35 } 36 37 static inline void rq_enet_desc_dec(struct rq_enet_desc *desc, 38 u64 *address, u8 *type, u16 *length) 39 { 40 *address = le64_to_cpu(desc->address); 41 *length = le16_to_cpu(desc->length_type) & RQ_ENET_LEN_MASK; 42 *type = (u8)((le16_to_cpu(desc->length_type) >> RQ_ENET_LEN_BITS) & 43 RQ_ENET_TYPE_MASK); 44 } 45 46 #endif /* _RQ_ENET_DESC_H_ */ 47