cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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wq_enet_desc.h (3780B)


      1/*
      2 * Copyright 2014 Cisco Systems, Inc.  All rights reserved.
      3 *
      4 * This program is free software; you may redistribute it and/or modify
      5 * it under the terms of the GNU General Public License as published by
      6 * the Free Software Foundation; version 2 of the License.
      7 *
      8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
      9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
     12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
     13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     15 * SOFTWARE.
     16 */
     17
     18#ifndef _WQ_ENET_DESC_H_
     19#define _WQ_ENET_DESC_H_
     20
     21/* Ethernet work queue descriptor: 16B */
     22struct 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
     51static 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
     70static 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_ */