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 */ 8 struct 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 64 17 #define WQ_ENET_LEN_BITS 14 18 #define WQ_ENET_LEN_MASK ((1 << WQ_ENET_LEN_BITS) - 1) 19 #define WQ_ENET_MSS_BITS 14 20 #define WQ_ENET_MSS_MASK ((1 << WQ_ENET_MSS_BITS) - 1) 21 #define WQ_ENET_MSS_SHIFT 2 22 #define WQ_ENET_LOOPBACK_SHIFT 1 23 #define WQ_ENET_HDRLEN_BITS 10 24 #define WQ_ENET_HDRLEN_MASK ((1 << WQ_ENET_HDRLEN_BITS) - 1) 25 #define WQ_ENET_FLAGS_OM_BITS 2 26 #define WQ_ENET_FLAGS_OM_MASK ((1 << WQ_ENET_FLAGS_OM_BITS) - 1) 27 #define WQ_ENET_FLAGS_EOP_SHIFT 12 28 #define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT 13 29 #define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT 14 30 #define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT 15 31 32 #define WQ_ENET_OFFLOAD_MODE_CSUM 0 33 #define WQ_ENET_OFFLOAD_MODE_RESERVED 1 34 #define WQ_ENET_OFFLOAD_MODE_CSUM_L4 2 35 #define WQ_ENET_OFFLOAD_MODE_TSO 3 36 37 static 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 56 static 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