a02b9dc90d
Create sync_file->fence to abstract the type of fence we are using for each sync_file. If only one fence is present we use a normal struct fence but if there is more fences to be added to the sync_file a fence_array is created. This change cleans up sync_file a bit. We don't need to have sync_file_cb array anymore. Instead, as we always have one fence, only one fence callback is registered per sync_file. v2: Comments from Chris Wilson and Christian König - Not using fence_ops anymore - fence_is_array() was created to differentiate fence from fence_array - fence_array_teardown() is now exported and used under fence_is_array() - struct sync_file lost num_fences member v3: Comments from Chris Wilson and Christian König - struct sync_file lost status member in favor of fence_is_signaled() - drop use of fence_array_teardown() - use sizeof(*fence) to allocate only an array on fence pointers v4: Comments from Chris Wilson - use sizeof(*fence) to reallocate array - fix typo in comments - protect num_fences sum against overflows - use array->base instead of casting the to struct fence v5: fixes checkpatch warnings v6: fix case where all fences are signaled. Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Acked-by: Christian König <christian.koenig@amd.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/*
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* include/linux/sync_file.h
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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_FILE_H
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#define _LINUX_SYNC_FILE_H
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#include <linux/types.h>
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#include <linux/kref.h>
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#include <linux/ktime.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/fence-array.h>
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/**
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* struct sync_file - sync file to export to the userspace
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* @file: file representing this fence
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* @kref: reference count on fence.
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* @name: name of sync_file. Useful for debugging
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* @sync_file_list: membership in global file list
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* @wq: wait queue for fence signaling
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* @fence: fence with the fences in the sync_file
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* @cb: fence callback information
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*/
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struct sync_file {
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struct file *file;
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struct kref kref;
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char name[32];
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#ifdef CONFIG_DEBUG_FS
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struct list_head sync_file_list;
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#endif
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wait_queue_head_t wq;
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struct fence *fence;
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struct fence_cb cb;
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};
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struct sync_file *sync_file_create(struct fence *fence);
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#endif /* _LINUX_SYNC_H */
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