xref: /src/sys/external/bsd/drm2/i915drm/i915_gem_userptr.c

/*	$NetBSD: i915_gem_userptr.c,v 1.5 2021/12/19 12:10:34 riastradh Exp $	*/

/*-
 * Copyright (c) 2018 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Taylor R. Campbell.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: i915_gem_userptr.c,v 1.5 2021/12/19 12:10:34 riastradh Exp $");

#include "i915_drv.h"
#include "../dist/drm/i915/gem/i915_gem_ioctls.h"

#include <linux/nbsd-namespace.h>

/*
 * XXX this file is dumb and maybe shouldn't exist; it exists because
 * riastradh is a lazybones
 */

int
i915_gem_init_userptr(struct drm_i915_private *dev_priv)
{
	mutex_init(&dev_priv->mm_lock);
	hash_init(dev_priv->mm_structs);

	dev_priv->mm.userptr_wq =
		alloc_workqueue("i915-userptr-acquire",
				WQ_HIGHPRI | WQ_UNBOUND,
				0);
	if (!dev_priv->mm.userptr_wq)
		return -ENOMEM;

	return 0;
}

void
i915_gem_cleanup_userptr(struct drm_i915_private *dev_priv)
{
	destroy_workqueue(dev_priv->mm.userptr_wq);
	mutex_destroy(&dev_priv->mm_lock);
}

int
i915_gem_userptr_ioctl(struct drm_device *dev, void *data,
    struct drm_file *file)
{
	return -ENODEV;
}