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 } 49