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/*
* drivers/video/tegra/host/gk20a/fence_gk20a.h
*
* GK20A Fences
*
* Copyright (c) 2014-2017, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#ifndef _GK20A_FENCE_H_
#define _GK20A_FENCE_H_
#include <nvgpu/kref.h>
struct platform_device;
struct sync_timeline;
struct sync_fence;
struct nvgpu_semaphore;
struct channel_gk20a;
struct gk20a;
struct gk20a_fence_ops;
struct gk20a_fence {
struct gk20a *g;
/* Valid for all fence types: */
bool valid;
struct nvgpu_ref ref;
bool wfi;
struct sync_fence *sync_fence;
const struct gk20a_fence_ops *ops;
/* Valid for fences created from semaphores: */
struct nvgpu_semaphore *semaphore;
struct nvgpu_cond *semaphore_wq;
/* Valid for fences created from syncpoints: */
struct nvgpu_nvhost_dev *nvhost_dev;
u32 syncpt_id;
u32 syncpt_value;
/* Valid for fences part of a pre-allocated fence pool */
struct nvgpu_allocator *allocator;
};
/* Fences can be created from semaphores or syncpoint (id, value) pairs */
int gk20a_fence_from_semaphore(
struct gk20a *g,
struct gk20a_fence *fence_out,
struct sync_timeline *timeline,
struct nvgpu_semaphore *semaphore,
struct nvgpu_cond *semaphore_wq,
bool wfi, bool need_sync_fence);
int gk20a_fence_from_syncpt(
struct gk20a_fence *fence_out,
struct nvgpu_nvhost_dev *nvhost_dev,
u32 id, u32 value, bool wfi,
bool need_sync_fence);
int gk20a_alloc_fence_pool(
struct channel_gk20a *c,
unsigned int count);
void gk20a_free_fence_pool(
struct channel_gk20a *c);
struct gk20a_fence *gk20a_alloc_fence(
struct channel_gk20a *c);
void gk20a_init_fence(struct gk20a_fence *f,
const struct gk20a_fence_ops *ops,
struct sync_fence *sync_fence, bool wfi);
/* Fence operations */
void gk20a_fence_put(struct gk20a_fence *f);
struct gk20a_fence *gk20a_fence_get(struct gk20a_fence *f);
int gk20a_fence_wait(struct gk20a *g, struct gk20a_fence *f,
unsigned long timeout);
bool gk20a_fence_is_expired(struct gk20a_fence *f);
int gk20a_fence_install_fd(struct gk20a_fence *f);
#endif
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