diff options
Diffstat (limited to 'drivers/net/ethernet/cisco/enic/rq_enet_desc.h')
| -rw-r--r-- | drivers/net/ethernet/cisco/enic/rq_enet_desc.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/net/ethernet/cisco/enic/rq_enet_desc.h b/drivers/net/ethernet/cisco/enic/rq_enet_desc.h new file mode 100644 index 000000000..0ab5fd6b8 --- /dev/null +++ b/drivers/net/ethernet/cisco/enic/rq_enet_desc.h @@ -0,0 +1,47 @@ +/* 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_ */ |