1/*	$NetBSD: vbox_ttm.c,v 1.2 2021/12/18 23:45:44 riastradh Exp $	*/
2
3// SPDX-License-Identifier: MIT
4/*
5 * Copyright (C) 2013-2017 Oracle Corporation
6 * This file is based on ast_ttm.c
7 * Copyright 2012 Red Hat Inc.
8 * Authors: Dave Airlie <airlied@redhat.com>
9 *          Michael Thayer <michael.thayer@oracle.com>
10 */
11#include <sys/cdefs.h>
12__KERNEL_RCSID(0, "$NetBSD: vbox_ttm.c,v 1.2 2021/12/18 23:45:44 riastradh Exp $");
13
14#include <linux/pci.h>
15#include <drm/drm_file.h>
16#include "vbox_drv.h"
17
18int vbox_mm_init(struct vbox_private *vbox)
19{
20	struct drm_vram_mm *vmm;
21	int ret;
22	struct drm_device *dev = &vbox->ddev;
23
24	vmm = drm_vram_helper_alloc_mm(dev, pci_resource_start(dev->pdev, 0),
25				       vbox->available_vram_size);
26	if (IS_ERR(vmm)) {
27		ret = PTR_ERR(vmm);
28		DRM_ERROR("Error initializing VRAM MM; %d\n", ret);
29		return ret;
30	}
31
32#ifdef DRM_MTRR_WC
33	vbox->fb_mtrr = drm_mtrr_add(pci_resource_start(dev->pdev, 0),
34				     pci_resource_len(dev->pdev, 0),
35				     DRM_MTRR_WC);
36#else
37	vbox->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
38					 pci_resource_len(dev->pdev, 0));
39#endif
40	return 0;
41}
42
43void vbox_mm_fini(struct vbox_private *vbox)
44{
45#ifdef DRM_MTRR_WC
46	drm_mtrr_del(vbox->fb_mtrr,
47		     pci_resource_start(vbox->ddev.pdev, 0),
48		     pci_resource_len(vbox->ddev.pdev, 0), DRM_MTRR_WC);
49#else
50	arch_phys_wc_del(vbox->fb_mtrr);
51#endif
52	drm_vram_helper_release_mm(&vbox->ddev);
53}
54