tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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}