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58 lines
1.9 KiB
58 lines
1.9 KiB
/* |
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* Copyright 2008 Cisco Systems, Inc. All rights reserved. |
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* Copyright 2007 Nuova Systems, Inc. All rights reserved. |
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* |
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* This program is free software; you may redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; version 2 of the License. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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#ifndef _RQ_ENET_DESC_H_ |
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#define _RQ_ENET_DESC_H_ |
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/* Ethernet receive queue descriptor: 16B */ |
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struct rq_enet_desc { |
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__le64 address; |
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__le16 length_type; |
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u8 reserved[6]; |
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}; |
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enum rq_enet_type_types { |
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RQ_ENET_TYPE_ONLY_SOP = 0, |
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RQ_ENET_TYPE_NOT_SOP = 1, |
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RQ_ENET_TYPE_RESV2 = 2, |
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RQ_ENET_TYPE_RESV3 = 3, |
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}; |
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#define RQ_ENET_ADDR_BITS 64 |
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#define RQ_ENET_LEN_BITS 14 |
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#define RQ_ENET_LEN_MASK ((1 << RQ_ENET_LEN_BITS) - 1) |
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#define RQ_ENET_TYPE_BITS 2 |
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#define RQ_ENET_TYPE_MASK ((1 << RQ_ENET_TYPE_BITS) - 1) |
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static inline void rq_enet_desc_enc(struct rq_enet_desc *desc, |
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u64 address, u8 type, u16 length) |
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{ |
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desc->address = cpu_to_le64(address); |
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desc->length_type = cpu_to_le16((length & RQ_ENET_LEN_MASK) | |
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((type & RQ_ENET_TYPE_MASK) << RQ_ENET_LEN_BITS)); |
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} |
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static inline void rq_enet_desc_dec(struct rq_enet_desc *desc, |
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u64 *address, u8 *type, u16 *length) |
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{ |
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*address = le64_to_cpu(desc->address); |
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*length = le16_to_cpu(desc->length_type) & RQ_ENET_LEN_MASK; |
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*type = (u8)((le16_to_cpu(desc->length_type) >> RQ_ENET_LEN_BITS) & |
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RQ_ENET_TYPE_MASK); |
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} |
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#endif /* _RQ_ENET_DESC_H_ */
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