linux/drivers/gpu/drm/radeon/radeon_sync.c

/*
 * Copyright 2014 Advanced Micro Devices, Inc.
 * 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, sub license, 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 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 NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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.
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 */
/*
 * Authors:
 *    Christian König <[email protected]>
 */

#include "radeon.h"
#include "radeon_trace.h"

/**
 * radeon_sync_create - zero init sync object
 *
 * @sync: sync object to initialize
 *
 * Just clear the sync object for now.
 */
void radeon_sync_create(struct radeon_sync *sync)
{ … }

/**
 * radeon_sync_fence - use the semaphore to sync to a fence
 *
 * @sync: sync object to add fence to
 * @fence: fence to sync to
 *
 * Sync to the fence using the semaphore objects
 */
void radeon_sync_fence(struct radeon_sync *sync,
		       struct radeon_fence *fence)
{ … }

/**
 * radeon_sync_resv - use the semaphores to sync to a reservation object
 *
 * @rdev: radeon_device pointer
 * @sync: sync object to add fences from reservation object to
 * @resv: reservation object with embedded fence
 * @shared: true if we should only sync to the exclusive fence
 *
 * Sync to the fence using the semaphore objects
 */
int radeon_sync_resv(struct radeon_device *rdev,
		     struct radeon_sync *sync,
		     struct dma_resv *resv,
		     bool shared)
{ … }

/**
 * radeon_sync_rings - sync ring to all registered fences
 *
 * @rdev: radeon_device pointer
 * @sync: sync object to use
 * @ring: ring that needs sync
 *
 * Ensure that all registered fences are signaled before letting
 * the ring continue. The caller must hold the ring lock.
 */
int radeon_sync_rings(struct radeon_device *rdev,
		      struct radeon_sync *sync,
		      int ring)
{ … }

/**
 * radeon_sync_free - free the sync object
 *
 * @rdev: radeon_device pointer
 * @sync: sync object to use
 * @fence: fence to use for the free
 *
 * Free the sync object by freeing all semaphores in it.
 */
void radeon_sync_free(struct radeon_device *rdev,
		      struct radeon_sync *sync,
		      struct radeon_fence *fence)
{ … }