drivers/gpu/drm/vboxvideo/vbox_ttm.c

   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
  13 int 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         if (IS_ERR(vmm)) {
  22                 ret = PTR_ERR(vmm);
  23                 DRM_ERROR("Error initializing VRAM MM; %d\n", ret);
  24                 return ret;
  25         }
  26
  27 #ifdef DRM_MTRR_WC
  28         vbox->fb_mtrr = drm_mtrr_add(pci_resource_start(dev->pdev, 0),
  29                                      pci_resource_len(dev->pdev, 0),
  30                                      DRM_MTRR_WC);
  31 #else
  32         vbox->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
  33                                          pci_resource_len(dev->pdev, 0));
  34 #endif
  35         return 0;
  36 }
  37
  38 void vbox_mm_fini(struct vbox_private *vbox)
  39 {
  40 #ifdef DRM_MTRR_WC
  41         drm_mtrr_del(vbox->fb_mtrr,
  42                      pci_resource_start(vbox->ddev.pdev, 0),
  43                      pci_resource_len(vbox->ddev.pdev, 0), DRM_MTRR_WC);
  44 #else
  45         arch_phys_wc_del(vbox->fb_mtrr);
  46 #endif
  47         drm_vram_helper_release_mm(&vbox->ddev);
  48 }