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When moving compression state tracking and compbit management ops to kernel, we need to attach a fence to dma-buf metadata, along with the compbit state. To make in-kernel fence management easier, introduce a new gk20a_fence abstraction. A gk20a_fence may be backed by a semaphore or a syncpoint (id, value) pair. If the kernel is configured with CONFIG_SYNC, it will also contain a sync_fence. The gk20a_fence can easily be converted back to a syncpoint (id, value) parir or sync FD when we need to return it to user space. Change gk20a_submit_channel_gpfifo to return a gk20a_fence instead of nvhost_fence. This is to facilitate work submission initiated from kernel. Bug 1509620 Change-Id: I6154764a279dba83f5e91ba9e0cb5e227ca08e1b Signed-off-by: Lauri Peltonen <lpeltonen@nvidia.com> Reviewed-on: http://git-master/r/439846 Reviewed-by: Automatic_Commit_Validation_User Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com> Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>
47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/*
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* drivers/video/tegra/host/gk20a/sync_gk20a.h
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*
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* GK20A Sync Framework Integration
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*
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* Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#ifndef _GK20A_SYNC_H_
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#define _GK20A_SYNC_H_
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#include <linux/types.h>
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struct sync_timeline;
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struct sync_fence;
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struct sync_pt;
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struct gk20a_semaphore;
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#ifdef CONFIG_SYNC
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struct sync_timeline *gk20a_sync_timeline_create(const char *fmt, ...);
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void gk20a_sync_timeline_destroy(struct sync_timeline *);
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void gk20a_sync_timeline_signal(struct sync_timeline *);
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struct sync_fence *gk20a_sync_fence_create(struct sync_timeline *,
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struct gk20a_semaphore *,
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struct sync_fence *dependency,
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const char *fmt, ...);
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struct sync_fence *gk20a_sync_fence_fdget(int fd);
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#else
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static inline void gk20a_sync_timeline_destroy(struct sync_timeline *obj) {}
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static inline void gk20a_sync_timeline_signal(struct sync_timeline *obj) {}
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static inline struct sync_fence *gk20a_sync_fence_fdget(int fd)
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{
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return NULL;
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}
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#endif
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#endif
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