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                 drm_gem_object_unreference_unlocked(fb->nvbo->gem);
  44
  45         drm_framebuffer_cleanup(drm_fb);
  46         kfree(fb);
  47 }
  48
  49 static int
  50 nouveau_user_framebuffer_create_handle(struct drm_framebuffer *drm_fb,
  51                                        struct drm_file *file_priv,
  52                                        unsigned int *handle)
  53 {
  54         struct nouveau_framebuffer *fb = nouveau_framebuffer(drm_fb);
  55
  56         return drm_gem_handle_create(file_priv, fb->nvbo->gem, handle);
  57 }
  58
  59 static const struct drm_framebuffer_funcs nouveau_framebuffer_funcs = {
  60         .destroy = nouveau_user_framebuffer_destroy,
  61         .create_handle = nouveau_user_framebuffer_create_handle,
  62 };
  63
  64 struct drm_framebuffer *
  65 nouveau_framebuffer_create(struct drm_device *dev, struct nouveau_bo *nvbo,
  66                            struct drm_mode_fb_cmd *mode_cmd)
  67 {
  68         struct nouveau_framebuffer *fb;
  69         int ret;
  70
  71         fb = kzalloc(sizeof(struct nouveau_framebuffer), GFP_KERNEL);
  72         if (!fb)
  73                 return NULL;
  74
  75         ret = drm_framebuffer_init(dev, &fb->base, &nouveau_framebuffer_funcs);
  76         if (ret) {
  77                 kfree(fb);
  78                 return NULL;
  79         }
  80
  81         drm_helper_mode_fill_fb_struct(&fb->base, mode_cmd);
  82
  83         fb->nvbo = nvbo;
  84         return &fb->base;
  85 }
  86
  87 static struct drm_framebuffer *
  88 nouveau_user_framebuffer_create(struct drm_device *dev,
  89                                 struct drm_file *file_priv,
  90                                 struct drm_mode_fb_cmd *mode_cmd)
  91 {
  92         struct drm_framebuffer *fb;
  93         struct drm_gem_object *gem;
  94
  95         gem = drm_gem_object_lookup(dev, file_priv, mode_cmd->handle);
  96         if (!gem)
  97                 return NULL;
  98
  99         fb = nouveau_framebuffer_create(dev, nouveau_gem_object(gem), mode_cmd);
 100         if (!fb) {
 101                 drm_gem_object_unreference(gem);
 102                 return NULL;
 103         }
 104
 105         return fb;
 106 }
 107
 108 const struct drm_mode_config_funcs nouveau_mode_config_funcs = {
 109         .fb_create = nouveau_user_framebuffer_create,
 110         .fb_changed = nouveau_fbcon_probe,
 111 };
 112