/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
 */

#ifndef _RQ_ENET_DESC_H_
#define _RQ_ENET_DESC_H_

/* Ethernet receive queue descriptor: 16B */
struct rq_enet_desc {
        __le64 address;
        __le16 length_type;
        u8 reserved[6];
};

enum rq_enet_type_types {
        RQ_ENET_TYPE_ONLY_SOP = 0,
        RQ_ENET_TYPE_NOT_SOP = 1,
        RQ_ENET_TYPE_RESV2 = 2,
        RQ_ENET_TYPE_RESV3 = 3,
};

#define RQ_ENET_ADDR_BITS               64
#define RQ_ENET_LEN_BITS                14
#define RQ_ENET_LEN_MASK                ((1 << RQ_ENET_LEN_BITS) - 1)
#define RQ_ENET_TYPE_BITS               2
#define RQ_ENET_TYPE_MASK               ((1 << RQ_ENET_TYPE_BITS) - 1)

static inline void rq_enet_desc_enc(struct rq_enet_desc *desc,
        u64 address, u8 type, u16 length)
{
        desc->address = cpu_to_le64(address);
        desc->length_type = cpu_to_le16((length & RQ_ENET_LEN_MASK) |
                ((type & RQ_ENET_TYPE_MASK) << RQ_ENET_LEN_BITS));
}

static inline void rq_enet_desc_dec(struct rq_enet_desc *desc,
        u64 *address, u8 *type, u16 *length)
{
        *address = le64_to_cpu(desc->address);
        *length = le16_to_cpu(desc->length_type) & RQ_ENET_LEN_MASK;
        *type = (u8)((le16_to_cpu(desc->length_type) >> RQ_ENET_LEN_BITS) &
                RQ_ENET_TYPE_MASK);
}

#endif /* _RQ_ENET_DESC_H_ */