cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

sync_file.h (2898B)

      1/* SPDX-License-Identifier: GPL-1.0+ WITH Linux-syscall-note */
      2/*
      3 * Copyright (C) 2012 Google, Inc.
      4 *
      5 * This program is distributed in the hope that it will be useful,
      6 * but WITHOUT ANY WARRANTY; without even the implied warranty of
      7 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      8 * GNU General Public License for more details.
      9 *
     10 */
     11
     12#ifndef _UAPI_LINUX_SYNC_H
     13#define _UAPI_LINUX_SYNC_H
     14
     15#include <linux/ioctl.h>
     16#include <linux/types.h>
     17
     18/**
     19 * struct sync_merge_data - data passed to merge ioctl
     20 * @name:	name of new fence
     21 * @fd2:	file descriptor of second fence
     22 * @fence:	returns the fd of the new fence to userspace
     23 * @flags:	merge_data flags
     24 * @pad:	padding for 64-bit alignment, should always be zero
     25 */
     26struct sync_merge_data {
     27	char	name[32];
     28	__s32	fd2;
     29	__s32	fence;
     30	__u32	flags;
     31	__u32	pad;
     32};
     33
     34/**
     35 * struct sync_fence_info - detailed fence information
     36 * @obj_name:		name of parent sync_timeline
     37* @driver_name:	name of driver implementing the parent
     38* @status:		status of the fence 0:active 1:signaled <0:error
     39 * @flags:		fence_info flags
     40 * @timestamp_ns:	timestamp of status change in nanoseconds
     41 */
     42struct sync_fence_info {
     43	char	obj_name[32];
     44	char	driver_name[32];
     45	__s32	status;
     46	__u32	flags;
     47	__u64	timestamp_ns;
     48};
     49
     50/**
     51 * struct sync_file_info - data returned from fence info ioctl
     52 * @name:	name of fence
     53 * @status:	status of fence. 1: signaled 0:active <0:error
     54 * @flags:	sync_file_info flags
     55 * @num_fences	number of fences in the sync_file
     56 * @pad:	padding for 64-bit alignment, should always be zero
     57 * @sync_fence_info: pointer to array of structs sync_fence_info with all
     58 *		 fences in the sync_file
     59 */
     60struct sync_file_info {
     61	char	name[32];
     62	__s32	status;
     63	__u32	flags;
     64	__u32	num_fences;
     65	__u32	pad;
     66
     67	__u64	sync_fence_info;
     68};
     69
     70#define SYNC_IOC_MAGIC		'>'
     71
     72/**
     73 * Opcodes  0, 1 and 2 were burned during a API change to avoid users of the
     74 * old API to get weird errors when trying to handling sync_files. The API
     75 * change happened during the de-stage of the Sync Framework when there was
     76 * no upstream users available.
     77 */
     78
     79/**
     80 * DOC: SYNC_IOC_MERGE - merge two fences
     81 *
     82 * Takes a struct sync_merge_data.  Creates a new fence containing copies of
     83 * the sync_pts in both the calling fd and sync_merge_data.fd2.  Returns the
     84 * new fence's fd in sync_merge_data.fence
     85 */
     86#define SYNC_IOC_MERGE		_IOWR(SYNC_IOC_MAGIC, 3, struct sync_merge_data)
     87
     88/**
     89 * DOC: SYNC_IOC_FILE_INFO - get detailed information on a sync_file
     90 *
     91 * Takes a struct sync_file_info. If num_fences is 0, the field is updated
     92 * with the actual number of fences. If num_fences is > 0, the system will
     93 * use the pointer provided on sync_fence_info to return up to num_fences of
     94 * struct sync_fence_info, with detailed fence information.
     95 */
     96#define SYNC_IOC_FILE_INFO	_IOWR(SYNC_IOC_MAGIC, 4, struct sync_file_info)
     97
     98#endif /* _UAPI_LINUX_SYNC_H */