97 lines
3.7 KiB
C
97 lines
3.7 KiB
C
/*
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* Copyright 2014 Cisco 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 _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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