drivers/gpu/drm/nouveau/nouveau_display.c

   1 /*
   2  * Copyright (C) 2008 Maarten Maathuis.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  */
  26
  27 #include "drmP.h"
  28 #include "drm_crtc_helper.h"
  29 #include "nouveau_drv.h"
  30 #include "nouveau_fb.h"
  31 #include "nouveau_fbcon.h"
  32
  33 static void
  34 nouveau_user_framebuffer_destroy(struct drm_framebuffer *drm_fb)
  35 {
  36         struct nouveau_framebuffer *fb = nouveau_framebuffer(drm_fb);
  37         struct drm_device *dev = drm_fb->dev;
  38
  39         if (drm_fb->fbdev)
  40                 nouveau_fbcon_remove(dev, drm_fb);
  41
  42         if (fb->nvbo) {
  43                 mutex_lock(&dev->struct_mutex);
  44                 drm_gem_object_unreference(fb->nvbo->gem);
  45                 mutex_unlock(&dev->struct_mutex);
  46         }
  47
  48         drm_framebuffer_cleanup(drm_fb);
  49         kfree(fb);
  50 }
  51
  52 static int
  53 nouveau_user_framebuffer_create_handle(struct drm_framebuffer *drm_fb,
  54                                        struct drm_file *file_priv,
  55                                        unsigned int *handle)
  56 {
  57         struct nouveau_framebuffer *fb = nouveau_framebuffer(drm_fb);
  58
  59         return drm_gem_handle_create(file_priv, fb->nvbo->gem, handle);
  60 }
  61
  62 static const struct drm_framebuffer_funcs nouveau_framebuffer_funcs = {
  63         .destroy = nouveau_user_framebuffer_destroy,
  64         .create_handle = nouveau_user_framebuffer_create_handle,
  65 };
  66
  67 struct drm_framebuffer *
  68 nouveau_framebuffer_create(struct drm_device *dev, struct nouveau_bo *nvbo,
  69                            struct drm_mode_fb_cmd *mode_cmd)
  70 {
  71         struct nouveau_framebuffer *fb;
  72         int ret;
  73
  74         fb = kzalloc(sizeof(struct nouveau_framebuffer), GFP_KERNEL);
  75         if (!fb)
  76                 return NULL;
  77
  78         ret = drm_framebuffer_init(dev, &fb->base, &nouveau_framebuffer_funcs);
  79         if (ret) {
  80                 kfree(fb);
  81                 return NULL;
  82         }
  83
  84         drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
  85
  86         fb->nvbo = nvbo;
  87         return &fb->base;
  88 }
  89
  90 static struct drm_framebuffer *
  91 nouveau_user_framebuffer_create(struct drm_device *dev,
  92                                 struct drm_file *file_priv,
  93                                 struct drm_mode_fb_cmd *mode_cmd)
  94 {
  95         struct drm_framebuffer *fb;
  96         struct drm_gem_object *gem;
  97
  98         gem = drm_gem_object_lookup(dev, file_priv, mode_cmd->handle);
  99         if (!gem)
 100                 return NULL;
 101
 102         fb = nouveau_framebuffer_create(dev, nouveau_gem_object(gem), mode_cmd);
 103         if (!fb) {
 104                 drm_gem_object_unreference(gem);
 105                 return NULL;
 106         }
 107
 108         return fb;
 109 }
 110
 111 const struct drm_mode_config_funcs nouveau_mode_config_funcs = {
 112         .fb_create = nouveau_user_framebuffer_create,
 113         .fb_changed = nouveau_fbcon_probe,
 114 };
 115