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1/* SPDX-License-Identifier: GPL-2.0-only */2/* Copyright 2014 Cisco Systems, Inc. All rights reserved. */3 4#ifndef _WQ_ENET_DESC_H_5#define _WQ_ENET_DESC_H_6 7/* Ethernet work queue descriptor: 16B */8struct wq_enet_desc {9 __le64 address;10 __le16 length;11 __le16 mss_loopback;12 __le16 header_length_flags;13 __le16 vlan_tag;14};15 16#define WQ_ENET_ADDR_BITS 6417#define WQ_ENET_LEN_BITS 1418#define WQ_ENET_LEN_MASK ((1 << WQ_ENET_LEN_BITS) - 1)19#define WQ_ENET_MSS_BITS 1420#define WQ_ENET_MSS_MASK ((1 << WQ_ENET_MSS_BITS) - 1)21#define WQ_ENET_MSS_SHIFT 222#define WQ_ENET_LOOPBACK_SHIFT 123#define WQ_ENET_HDRLEN_BITS 1024#define WQ_ENET_HDRLEN_MASK ((1 << WQ_ENET_HDRLEN_BITS) - 1)25#define WQ_ENET_FLAGS_OM_BITS 226#define WQ_ENET_FLAGS_OM_MASK ((1 << WQ_ENET_FLAGS_OM_BITS) - 1)27#define WQ_ENET_FLAGS_EOP_SHIFT 1228#define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT 1329#define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT 1430#define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT 1531 32#define WQ_ENET_OFFLOAD_MODE_CSUM 033#define WQ_ENET_OFFLOAD_MODE_RESERVED 134#define WQ_ENET_OFFLOAD_MODE_CSUM_L4 235#define WQ_ENET_OFFLOAD_MODE_TSO 336 37static inline void wq_enet_desc_enc(struct wq_enet_desc *desc,38 u64 address, u16 length, u16 mss, u16 header_length,39 u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap,40 u8 vlan_tag_insert, u16 vlan_tag, u8 loopback)41{42 desc->address = cpu_to_le64(address);43 desc->length = cpu_to_le16(length & WQ_ENET_LEN_MASK);44 desc->mss_loopback = cpu_to_le16((mss & WQ_ENET_MSS_MASK) <<45 WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT);46 desc->header_length_flags = cpu_to_le16(47 (header_length & WQ_ENET_HDRLEN_MASK) |48 (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS |49 (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT |50 (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT |51 (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT |52 (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT);53 desc->vlan_tag = cpu_to_le16(vlan_tag);54}55 56static inline void wq_enet_desc_dec(struct wq_enet_desc *desc,57 u64 *address, u16 *length, u16 *mss, u16 *header_length,58 u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap,59 u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback)60{61 *address = le64_to_cpu(desc->address);62 *length = le16_to_cpu(desc->length) & WQ_ENET_LEN_MASK;63 *mss = (le16_to_cpu(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) &64 WQ_ENET_MSS_MASK;65 *loopback = (u8)((le16_to_cpu(desc->mss_loopback) >>66 WQ_ENET_LOOPBACK_SHIFT) & 1);67 *header_length = le16_to_cpu(desc->header_length_flags) &68 WQ_ENET_HDRLEN_MASK;69 *offload_mode = (u8)((le16_to_cpu(desc->header_length_flags) >>70 WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK);71 *eop = (u8)((le16_to_cpu(desc->header_length_flags) >>72 WQ_ENET_FLAGS_EOP_SHIFT) & 1);73 *cq_entry = (u8)((le16_to_cpu(desc->header_length_flags) >>74 WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1);75 *fcoe_encap = (u8)((le16_to_cpu(desc->header_length_flags) >>76 WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1);77 *vlan_tag_insert = (u8)((le16_to_cpu(desc->header_length_flags) >>78 WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1);79 *vlan_tag = le16_to_cpu(desc->vlan_tag);80}81 82#endif /* _WQ_ENET_DESC_H_ */83