drivers/gpu/drm/ast/ast_ttm.c

   1 /*
   2  * Copyright 2012 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the
   6  * "Software"), to deal in the Software without restriction, including
   7  * without limitation the rights to use, copy, modify, merge, publish,
   8  * distribute, sub license, and/or sell copies of the Software, and to
   9  * permit persons to whom the Software is furnished to do so, subject to
  10  * the following conditions:
  11  *
  12  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  13  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  14  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  15  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  16  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  17  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  18  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  19  *
  20  * The above copyright notice and this permission notice (including the
  21  * next paragraph) shall be included in all copies or substantial portions
  22  * of the Software.
  23  *
  24  */
  25 /*
  26  * Authors: Dave Airlie <airlied@redhat.com>
  27  */
  28
  29 #include <linux/pci.h>
  30
  31 #include <drm/drm_print.h>
  32 #include <drm/drm_gem_vram_helper.h>
  33
  34 #include "ast_drv.h"
  35
  36 int ast_mm_init(struct ast_private *ast)
  37 {
  38         struct drm_vram_mm *vmm;
  39         int ret;
  40         struct drm_device *dev = ast->dev;
  41
  42         vmm = drm_vram_helper_alloc_mm(
  43                 dev, pci_resource_start(dev->pdev, 0),
  44                 ast->vram_size);
  45         if (IS_ERR(vmm)) {
  46                 ret = PTR_ERR(vmm);
  47                 DRM_ERROR("Error initializing VRAM MM; %d\n", ret);
  48                 return ret;
  49         }
  50
  51         arch_io_reserve_memtype_wc(pci_resource_start(dev->pdev, 0),
  52                                    pci_resource_len(dev->pdev, 0));
  53         ast->fb_mtrr = arch_phys_wc_add(pci_resource_start(dev->pdev, 0),
  54                                         pci_resource_len(dev->pdev, 0));
  55
  56         return 0;
  57 }
  58
  59 void ast_mm_fini(struct ast_private *ast)
  60 {
  61         struct drm_device *dev = ast->dev;
  62
  63         drm_vram_helper_release_mm(dev);
  64
  65         arch_phys_wc_del(ast->fb_mtrr);
  66         arch_io_free_memtype_wc(pci_resource_start(dev->pdev, 0),
  67                                 pci_resource_len(dev->pdev, 0));
  68 }