xref: /kernel/linux/linux-5.10/drivers/gpu/drm/drm_legacy_misc.c

/*
 * \file drm_legacy_misc.c
 * Misc legacy support functions.
 *
 * \author Rickard E. (Rik) Faith <faith@valinux.com>
 * \author Gareth Hughes <gareth@valinux.com>
 */

/*
 * Created: Tue Feb  2 08:37:54 1999 by faith@valinux.com
 *
 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 * 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 (including the next
 * paragraph) 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
 * VA LINUX SYSTEMS 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.
 */

#include <drm/drm_agpsupport.h>
#include <drm/drm_device.h>
#include <drm/drm_drv.h>
#include <drm/drm_irq.h>
#include <drm/drm_print.h>

#include "drm_internal.h"
#include "drm_legacy.h"

void drm_legacy_init_members(struct drm_device *dev)
{
	INIT_LIST_HEAD(&dev->ctxlist);
	INIT_LIST_HEAD(&dev->vmalist);
	INIT_LIST_HEAD(&dev->maplist);
	spin_lock_init(&dev->buf_lock);
	mutex_init(&dev->ctxlist_mutex);
}

void drm_legacy_destroy_members(struct drm_device *dev)
{
	mutex_destroy(&dev->ctxlist_mutex);
}

int drm_legacy_setup(struct drm_device * dev)
{
	int ret;

	if (dev->driver->firstopen &&
	    drm_core_check_feature(dev, DRIVER_LEGACY)) {
		ret = dev->driver->firstopen(dev);
		if (ret != 0)
			return ret;
	}

	ret = drm_legacy_dma_setup(dev);
	if (ret < 0)
		return ret;


	DRM_DEBUG("\n");
	return 0;
}

void drm_legacy_dev_reinit(struct drm_device *dev)
{
	if (dev->irq_enabled)
		drm_irq_uninstall(dev);

	mutex_lock(&dev->struct_mutex);

	drm_legacy_agp_clear(dev);

	drm_legacy_sg_cleanup(dev);
	drm_legacy_vma_flush(dev);
	drm_legacy_dma_takedown(dev);

	mutex_unlock(&dev->struct_mutex);

	dev->sigdata.lock = NULL;

	dev->context_flag = 0;
	dev->last_context = 0;
	dev->if_version = 0;

	DRM_DEBUG("lastclose completed\n");
}

void drm_master_legacy_init(struct drm_master *master)
{
	spin_lock_init(&master->lock.spinlock);
	init_waitqueue_head(&master->lock.lock_queue);
}