1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright 2008-2017 Cisco Systems, Inc. All rights reserved. 3 * Copyright 2007 Nuova Systems, Inc. All rights reserved. 4 */ 5 6 #ifndef _WQ_ENET_DESC_H_ 7 #define _WQ_ENET_DESC_H_ 8 9 /* Ethernet work queue descriptor: 16B */ 10 struct wq_enet_desc { 11 __le64 address; 12 __le16 length; 13 __le16 mss_loopback; 14 __le16 header_length_flags; 15 __le16 vlan_tag; 16 }; 17 18 #define WQ_ENET_ADDR_BITS 64 19 #define WQ_ENET_LEN_BITS 14 20 #define WQ_ENET_LEN_MASK ((1 << WQ_ENET_LEN_BITS) - 1) 21 #define WQ_ENET_MSS_BITS 14 22 #define WQ_ENET_MSS_MASK ((1 << WQ_ENET_MSS_BITS) - 1) 23 #define WQ_ENET_MSS_SHIFT 2 24 #define WQ_ENET_LOOPBACK_SHIFT 1 25 #define WQ_ENET_HDRLEN_BITS 10 26 #define WQ_ENET_HDRLEN_MASK ((1 << WQ_ENET_HDRLEN_BITS) - 1) 27 #define WQ_ENET_FLAGS_OM_BITS 2 28 #define WQ_ENET_FLAGS_OM_MASK ((1 << WQ_ENET_FLAGS_OM_BITS) - 1) 29 #define WQ_ENET_FLAGS_EOP_SHIFT 12 30 #define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT 13 31 #define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT 14 32 #define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT 15 33 34 #define WQ_ENET_OFFLOAD_MODE_CSUM 0 35 #define WQ_ENET_OFFLOAD_MODE_RESERVED 1 36 #define WQ_ENET_OFFLOAD_MODE_CSUM_L4 2 37 #define WQ_ENET_OFFLOAD_MODE_TSO 3 38 39 static inline void wq_enet_desc_enc(struct wq_enet_desc *desc, 40 u64 address, u16 length, u16 mss, u16 header_length, 41 u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap, 42 u8 vlan_tag_insert, u16 vlan_tag, u8 loopback) 43 { 44 desc->address = cpu_to_le64(address); 45 desc->length = cpu_to_le16(length & WQ_ENET_LEN_MASK); 46 desc->mss_loopback = cpu_to_le16((mss & WQ_ENET_MSS_MASK) << 47 WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT); 48 desc->header_length_flags = cpu_to_le16( 49 (header_length & WQ_ENET_HDRLEN_MASK) | 50 (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS | 51 (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT | 52 (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT | 53 (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT | 54 (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT); 55 desc->vlan_tag = cpu_to_le16(vlan_tag); 56 } 57 58 static inline void wq_enet_desc_dec(struct wq_enet_desc *desc, 59 u64 *address, u16 *length, u16 *mss, u16 *header_length, 60 u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap, 61 u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback) 62 { 63 *address = le64_to_cpu(desc->address); 64 *length = le16_to_cpu(desc->length) & WQ_ENET_LEN_MASK; 65 *mss = (le16_to_cpu(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) & 66 WQ_ENET_MSS_MASK; 67 *loopback = (u8)((le16_to_cpu(desc->mss_loopback) >> 68 WQ_ENET_LOOPBACK_SHIFT) & 1); 69 *header_length = le16_to_cpu(desc->header_length_flags) & 70 WQ_ENET_HDRLEN_MASK; 71 *offload_mode = (u8)((le16_to_cpu(desc->header_length_flags) >> 72 WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK); 73 *eop = (u8)((le16_to_cpu(desc->header_length_flags) >> 74 WQ_ENET_FLAGS_EOP_SHIFT) & 1); 75 *cq_entry = (u8)((le16_to_cpu(desc->header_length_flags) >> 76 WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1); 77 *fcoe_encap = (u8)((le16_to_cpu(desc->header_length_flags) >> 78 WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1); 79 *vlan_tag_insert = (u8)((le16_to_cpu(desc->header_length_flags) >> 80 WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1); 81 *vlan_tag = le16_to_cpu(desc->vlan_tag); 82 } 83 84 #endif /* _WQ_ENET_DESC_H_ */ 85