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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if_rmnet.h (2084B)

      1/* SPDX-License-Identifier: GPL-2.0-only
      2 * Copyright (c) 2013-2019, 2021 The Linux Foundation. All rights reserved.
      3 */
      4
      5#ifndef _LINUX_IF_RMNET_H_
      6#define _LINUX_IF_RMNET_H_
      7
      8struct rmnet_map_header {
      9	u8 flags;			/* MAP_CMD_FLAG, MAP_PAD_LEN_MASK */
     10	u8 mux_id;
     11	__be16 pkt_len;			/* Length of packet, including pad */
     12}  __aligned(1);
     13
     14/* rmnet_map_header flags field:
     15 *  PAD_LEN:	  number of pad bytes following packet data
     16 *  CMD:	  1 = packet contains a MAP command; 0 = packet contains data
     17 *  NEXT_HEADER: 1 = packet contains V5 CSUM header 0 = no V5 CSUM header
     18 */
     19#define MAP_PAD_LEN_MASK		GENMASK(5, 0)
     20#define MAP_NEXT_HEADER_FLAG		BIT(6)
     21#define MAP_CMD_FLAG			BIT(7)
     22
     23struct rmnet_map_dl_csum_trailer {
     24	u8 reserved1;
     25	u8 flags;			/* MAP_CSUM_DL_VALID_FLAG */
     26	__be16 csum_start_offset;
     27	__be16 csum_length;
     28	__sum16 csum_value;
     29} __aligned(1);
     30
     31/* rmnet_map_dl_csum_trailer flags field:
     32 *  VALID:	1 = checksum and length valid; 0 = ignore them
     33 */
     34#define MAP_CSUM_DL_VALID_FLAG		BIT(0)
     35
     36struct rmnet_map_ul_csum_header {
     37	__be16 csum_start_offset;
     38	__be16 csum_info;		/* MAP_CSUM_UL_* */
     39} __aligned(1);
     40
     41/* csum_info field:
     42 *  OFFSET:	where (offset in bytes) to insert computed checksum
     43 *  UDP:	1 = UDP checksum (zero checkum means no checksum)
     44 *  ENABLED:	1 = checksum computation requested
     45 */
     46#define MAP_CSUM_UL_OFFSET_MASK		GENMASK(13, 0)
     47#define MAP_CSUM_UL_UDP_FLAG		BIT(14)
     48#define MAP_CSUM_UL_ENABLED_FLAG	BIT(15)
     49
     50/* MAP CSUM headers */
     51struct rmnet_map_v5_csum_header {
     52	u8 header_info;
     53	u8 csum_info;
     54	__be16 reserved;
     55} __aligned(1);
     56
     57/* v5 header_info field
     58 * NEXT_HEADER: represents whether there is any next header
     59 * HEADER_TYPE: represents the type of this header
     60 *
     61 * csum_info field
     62 * CSUM_VALID_OR_REQ:
     63 * 1 = for UL, checksum computation is requested.
     64 * 1 = for DL, validated the checksum and has found it valid
     65 */
     66
     67#define MAPV5_HDRINFO_NXT_HDR_FLAG	BIT(0)
     68#define MAPV5_HDRINFO_HDR_TYPE_FMASK	GENMASK(7, 1)
     69#define MAPV5_CSUMINFO_VALID_FLAG	BIT(7)
     70
     71#define RMNET_MAP_HEADER_TYPE_CSUM_OFFLOAD 2
     72#endif /* !(_LINUX_IF_RMNET_H_) */