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SW_SYNC allows to run tests on the sync_file framework via debugfs on <debugfs>/sync/sw_sync Opening and closing the file triggers creation and release of a sync timeline. To create fences on this timeline the SW_SYNC_IOC_CREATE_FENCE ioctl should be used. To increment the timeline value use SW_SYNC_IOC_INC. Also it exports Sync information on <debugfs>/sync/info Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
/*
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* Sync File validation framework and debug infomation
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*
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* Copyright (C) 2012 Google, Inc.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#ifndef _LINUX_SYNC_H
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#define _LINUX_SYNC_H
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#include <linux/list.h>
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#include <linux/spinlock.h>
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#include <linux/fence.h>
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#include <linux/sync_file.h>
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#include <uapi/linux/sync_file.h>
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/**
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* struct sync_timeline - sync object
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* @kref: reference count on fence.
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* @name: name of the sync_timeline. Useful for debugging
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* @child_list_head: list of children sync_pts for this sync_timeline
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* @child_list_lock: lock protecting @child_list_head and fence.status
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* @active_list_head: list of active (unsignaled/errored) sync_pts
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* @sync_timeline_list: membership in global sync_timeline_list
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*/
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struct sync_timeline {
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struct kref kref;
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char name[32];
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/* protected by child_list_lock */
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u64 context;
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int value;
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struct list_head child_list_head;
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spinlock_t child_list_lock;
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struct list_head active_list_head;
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struct list_head sync_timeline_list;
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};
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static inline struct sync_timeline *fence_parent(struct fence *fence)
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{
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return container_of(fence->lock, struct sync_timeline,
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child_list_lock);
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}
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/**
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* struct sync_pt - sync_pt object
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* @base: base fence object
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* @child_list: sync timeline child's list
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* @active_list: sync timeline active child's list
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*/
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struct sync_pt {
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struct fence base;
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struct list_head child_list;
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struct list_head active_list;
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};
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#ifdef CONFIG_SW_SYNC
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extern const struct file_operations sw_sync_debugfs_fops;
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void sync_timeline_debug_add(struct sync_timeline *obj);
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void sync_timeline_debug_remove(struct sync_timeline *obj);
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void sync_file_debug_add(struct sync_file *fence);
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void sync_file_debug_remove(struct sync_file *fence);
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void sync_dump(void);
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#else
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# define sync_timeline_debug_add(obj)
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# define sync_timeline_debug_remove(obj)
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# define sync_file_debug_add(fence)
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# define sync_file_debug_remove(fence)
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# define sync_dump()
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#endif
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#endif /* _LINUX_SYNC_H */
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