d3862e44da
The sync_pt were not adding themselves atomically to the timeline lists, corruption imminent. Only a single list is required to track the unsignaled sync_pt, so reduce it and rename the lock more appropriately along with using idiomatic names to distinguish a list from links along it. v2: Prevent spinlock recursion on free during create (next patch) and fixup crossref in kerneldoc Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Sean Paul <seanpaul@chromium.org> Cc: Gustavo Padovan <gustavo@padovan.org> Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170629210532.5617-1-chris@chris-wilson.co.uk
79 lines
1.9 KiB
C
79 lines
1.9 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/dma-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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* @lock: lock protecting @pt_list and @value
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* @pt_list: 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 lock */
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u64 context;
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int value;
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struct list_head pt_list;
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spinlock_t lock;
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struct list_head sync_timeline_list;
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};
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static inline struct sync_timeline *dma_fence_parent(struct dma_fence *fence)
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{
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return container_of(fence->lock, struct sync_timeline, 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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* @link: link on the sync timeline's list
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*/
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struct sync_pt {
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struct dma_fence base;
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struct list_head link;
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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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