LXR linux/drivers/gpu/drm/vboxvideo/vbox

   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        int ret;
  16        struct drm_device *dev = &vbox->ddev;
  17        struct pci_dev *pdev = to_pci_dev(dev->dev);
  18
  19        ret = drmm_vram_helper_init(dev, pci_resource_start(pdev, 0),
  20                                       vbox->available_vram_size);
  21        if (ret) {
  22                DRM_ERROR("Error initializing VRAM MM; %d\n", ret);
  23                return ret;
  24        }
  25
  26        vbox->fb_mtrr = arch_phys_wc_add(pci_resource_start(pdev, 0),
  27                                         pci_resource_len(pdev, 0));
  28        return 0;
  29}
  30
  31void vbox_mm_fini(struct vbox_private *vbox)
  32{
  33        arch_phys_wc_del(vbox->fb_mtrr);
  34}
  35