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Ole André Vadla Ravnås 2022-05-07 01:01:45 +02:00
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drivers/net/ethernet/cisco/enic/rq_enet_desc.h Normal file
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/*
* Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
* Copyright 2007 Nuova Systems, Inc. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#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_ */