workbench/hidds/nouveau/drm/libdrm/arosdrm_nouveau.c

   1 /*
   2     Copyright 2010, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #include "arosdrm.h"
   7 #include "drmP.h"
   8
   9 extern struct drm_driver * current_drm_driver;
  10
  11 /* FIXME: Array for now, list maybe in future */
  12 extern struct drm_file * drm_files[128];
  13
  14 /* FIXME: this should be generic, not nouveau specific */
  15 #include "nouveau_drv.h"
  16 void * drmMMap(int fd, uint32_t handle)
  17 {
  18     struct drm_file * f = drm_files[fd];
  19     struct drm_gem_object * gem_object = NULL;
  20     struct nouveau_bo * nvbo = NULL;
  21     void * addr = NULL;
  22
  23     if (!f)
  24         return NULL;
  25
  26     /* Get GEM objects from handle */
  27     gem_object = drm_gem_object_lookup(current_drm_driver->dev, f, handle);
  28     if (!gem_object)
  29         return NULL;
  30
  31     /* Translate to nouveau_bo */
  32     nvbo = nouveau_gem_object(gem_object);
  33
  34     if (nvbo)
  35     {
  36         /* Perform mapping if not already done */
  37         if (!nvbo->kmap.virtual)
  38             nouveau_bo_map(nvbo);
  39
  40         addr = nvbo->kmap.virtual;
  41     }
  42
  43     /* Release the acquired reference */
  44     mutex_lock(&current_drm_driver->dev->struct_mutex);
  45     drm_gem_object_unreference(gem_object);
  46     mutex_unlock(&current_drm_driver->dev->struct_mutex);
  47
  48     /* Return virtual address */
  49     return addr;
  50 }
  51
  52 void drmMUnmap(int fd, uint32_t handle)
  53 {
  54     struct drm_file * f = drm_files[fd];
  55     struct drm_gem_object * gem_object = NULL;
  56     struct nouveau_bo * nvbo = NULL;
  57
  58     if (!f) return ;
  59
  60     /* Get GEM objects from handle */
  61     gem_object = drm_gem_object_lookup(current_drm_driver->dev, f, handle);
  62     if (!gem_object) return;
  63
  64     /* Translate to nouveau_bo */
  65     nvbo = nouveau_gem_object(gem_object);
  66     if (nvbo)
  67     {
  68         /* Perform unmapping if not already done */
  69         if (nvbo->kmap.virtual)
  70             nouveau_bo_unmap(nvbo);
  71     }
  72
  73     /* Release the acquired reference */
  74     mutex_lock(&current_drm_driver->dev->struct_mutex);
  75     drm_gem_object_unreference(gem_object);
  76     mutex_unlock(&current_drm_driver->dev->struct_mutex);
  77 }
  78