114 lines
4.4 KiB
C
114 lines
4.4 KiB
C
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/*
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* Copyright 2008-2010 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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* Copyright (c) 2014, Cisco Systems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef _WQ_ENET_DESC_H_
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#define _WQ_ENET_DESC_H_
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/* Ethernet work queue descriptor: 16B */
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struct wq_enet_desc {
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__le64 address;
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__le16 length;
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__le16 mss_loopback;
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__le16 header_length_flags;
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__le16 vlan_tag;
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};
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#define WQ_ENET_ADDR_BITS 64
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#define WQ_ENET_LEN_BITS 14
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#define WQ_ENET_LEN_MASK ((1 << WQ_ENET_LEN_BITS) - 1)
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#define WQ_ENET_MSS_BITS 14
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#define WQ_ENET_MSS_MASK ((1 << WQ_ENET_MSS_BITS) - 1)
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#define WQ_ENET_MSS_SHIFT 2
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#define WQ_ENET_LOOPBACK_SHIFT 1
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#define WQ_ENET_HDRLEN_BITS 10
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#define WQ_ENET_HDRLEN_MASK ((1 << WQ_ENET_HDRLEN_BITS) - 1)
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#define WQ_ENET_FLAGS_OM_BITS 2
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#define WQ_ENET_FLAGS_OM_MASK ((1 << WQ_ENET_FLAGS_OM_BITS) - 1)
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#define WQ_ENET_FLAGS_EOP_SHIFT 12
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#define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT 13
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#define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT 14
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#define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT 15
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#define WQ_ENET_OFFLOAD_MODE_CSUM 0
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#define WQ_ENET_OFFLOAD_MODE_RESERVED 1
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#define WQ_ENET_OFFLOAD_MODE_CSUM_L4 2
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#define WQ_ENET_OFFLOAD_MODE_TSO 3
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static inline void wq_enet_desc_enc(struct wq_enet_desc *desc,
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u64 address, u16 length, u16 mss, u16 header_length,
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u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap,
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u8 vlan_tag_insert, u16 vlan_tag, u8 loopback)
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{
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desc->address = cpu_to_le64(address);
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desc->length = cpu_to_le16(length & WQ_ENET_LEN_MASK);
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desc->mss_loopback = cpu_to_le16((mss & WQ_ENET_MSS_MASK) <<
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WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT);
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desc->header_length_flags = cpu_to_le16(
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(header_length & WQ_ENET_HDRLEN_MASK) |
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(offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS |
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(eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT |
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(cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT |
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(fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT |
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(vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT);
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desc->vlan_tag = cpu_to_le16(vlan_tag);
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}
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static inline void wq_enet_desc_dec(struct wq_enet_desc *desc,
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u64 *address, u16 *length, u16 *mss, u16 *header_length,
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u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap,
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u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback)
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{
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*address = le64_to_cpu(desc->address);
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*length = le16_to_cpu(desc->length) & WQ_ENET_LEN_MASK;
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*mss = (le16_to_cpu(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) &
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WQ_ENET_MSS_MASK;
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*loopback = (u8)((le16_to_cpu(desc->mss_loopback) >>
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WQ_ENET_LOOPBACK_SHIFT) & 1);
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*header_length = le16_to_cpu(desc->header_length_flags) &
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WQ_ENET_HDRLEN_MASK;
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*offload_mode = (u8)((le16_to_cpu(desc->header_length_flags) >>
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WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK);
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*eop = (u8)((le16_to_cpu(desc->header_length_flags) >>
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WQ_ENET_FLAGS_EOP_SHIFT) & 1);
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*cq_entry = (u8)((le16_to_cpu(desc->header_length_flags) >>
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WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1);
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*fcoe_encap = (u8)((le16_to_cpu(desc->header_length_flags) >>
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WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1);
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*vlan_tag_insert = (u8)((le16_to_cpu(desc->header_length_flags) >>
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WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1);
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*vlan_tag = le16_to_cpu(desc->vlan_tag);
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}
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#endif /* _WQ_ENET_DESC_H_ */
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