| Abhijeet Joglekar | 5df6d73 | 2009-04-17 18:33:26 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2008 Cisco Systems, Inc. All rights reserved. |
| 3 | * Copyright 2007 Nuova Systems, Inc. All rights reserved. |
| 4 | * |
| 5 | * This program is free software; you may redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; version 2 of the License. |
| 8 | * |
| 9 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 10 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 11 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 12 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 13 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 14 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 15 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 16 | * SOFTWARE. |
| 17 | */ |
| 18 | #ifndef _WQ_ENET_DESC_H_ |
| 19 | #define _WQ_ENET_DESC_H_ |
| 20 | |
| 21 | /* Ethernet work queue descriptor: 16B */ |
| 22 | struct wq_enet_desc { |
| 23 | __le64 address; |
| 24 | __le16 length; |
| 25 | __le16 mss_loopback; |
| 26 | __le16 header_length_flags; |
| 27 | __le16 vlan_tag; |
| 28 | }; |
| 29 | |
| 30 | #define WQ_ENET_ADDR_BITS 64 |
| 31 | #define WQ_ENET_LEN_BITS 14 |
| 32 | #define WQ_ENET_LEN_MASK ((1 << WQ_ENET_LEN_BITS) - 1) |
| 33 | #define WQ_ENET_MSS_BITS 14 |
| 34 | #define WQ_ENET_MSS_MASK ((1 << WQ_ENET_MSS_BITS) - 1) |
| 35 | #define WQ_ENET_MSS_SHIFT 2 |
| 36 | #define WQ_ENET_LOOPBACK_SHIFT 1 |
| 37 | #define WQ_ENET_HDRLEN_BITS 10 |
| 38 | #define WQ_ENET_HDRLEN_MASK ((1 << WQ_ENET_HDRLEN_BITS) - 1) |
| 39 | #define WQ_ENET_FLAGS_OM_BITS 2 |
| 40 | #define WQ_ENET_FLAGS_OM_MASK ((1 << WQ_ENET_FLAGS_OM_BITS) - 1) |
| 41 | #define WQ_ENET_FLAGS_EOP_SHIFT 12 |
| 42 | #define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT 13 |
| 43 | #define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT 14 |
| 44 | #define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT 15 |
| 45 | |
| 46 | #define WQ_ENET_OFFLOAD_MODE_CSUM 0 |
| 47 | #define WQ_ENET_OFFLOAD_MODE_RESERVED 1 |
| 48 | #define WQ_ENET_OFFLOAD_MODE_CSUM_L4 2 |
| 49 | #define WQ_ENET_OFFLOAD_MODE_TSO 3 |
| 50 | |
| 51 | static inline void wq_enet_desc_enc(struct wq_enet_desc *desc, |
| 52 | u64 address, u16 length, u16 mss, u16 header_length, |
| 53 | u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap, |
| 54 | u8 vlan_tag_insert, u16 vlan_tag, u8 loopback) |
| 55 | { |
| 56 | desc->address = cpu_to_le64(address); |
| 57 | desc->length = cpu_to_le16(length & WQ_ENET_LEN_MASK); |
| 58 | desc->mss_loopback = cpu_to_le16((mss & WQ_ENET_MSS_MASK) << |
| 59 | WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT); |
| 60 | desc->header_length_flags = cpu_to_le16( |
| 61 | (header_length & WQ_ENET_HDRLEN_MASK) | |
| 62 | (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS | |
| 63 | (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT | |
| 64 | (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT | |
| 65 | (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT | |
| 66 | (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT); |
| 67 | desc->vlan_tag = cpu_to_le16(vlan_tag); |
| 68 | } |
| 69 | |
| 70 | static inline void wq_enet_desc_dec(struct wq_enet_desc *desc, |
| 71 | u64 *address, u16 *length, u16 *mss, u16 *header_length, |
| 72 | u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap, |
| 73 | u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback) |
| 74 | { |
| 75 | *address = le64_to_cpu(desc->address); |
| 76 | *length = le16_to_cpu(desc->length) & WQ_ENET_LEN_MASK; |
| 77 | *mss = (le16_to_cpu(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) & |
| 78 | WQ_ENET_MSS_MASK; |
| 79 | *loopback = (u8)((le16_to_cpu(desc->mss_loopback) >> |
| 80 | WQ_ENET_LOOPBACK_SHIFT) & 1); |
| 81 | *header_length = le16_to_cpu(desc->header_length_flags) & |
| 82 | WQ_ENET_HDRLEN_MASK; |
| 83 | *offload_mode = (u8)((le16_to_cpu(desc->header_length_flags) >> |
| 84 | WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK); |
| 85 | *eop = (u8)((le16_to_cpu(desc->header_length_flags) >> |
| 86 | WQ_ENET_FLAGS_EOP_SHIFT) & 1); |
| 87 | *cq_entry = (u8)((le16_to_cpu(desc->header_length_flags) >> |
| 88 | WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1); |
| 89 | *fcoe_encap = (u8)((le16_to_cpu(desc->header_length_flags) >> |
| 90 | WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1); |
| 91 | *vlan_tag_insert = (u8)((le16_to_cpu(desc->header_length_flags) >> |
| 92 | WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1); |
| 93 | *vlan_tag = le16_to_cpu(desc->vlan_tag); |
| 94 | } |
| 95 | |
| 96 | #endif /* _WQ_ENET_DESC_H_ */ |