/*
* drivers/video/tegra/host/gk20a/fence_gk20a.h
*
* GK20A Fences
*
* Copyright (c) 2014-2017, NVIDIA CORPORATION. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#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
