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