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
vbox_mm_init(struct vbox_private * vbox)18 int 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
vbox_mm_fini(struct vbox_private * vbox)43 void 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