drm_drawable.c

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    1 /*-
    2  * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
    3  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
    4  * All Rights Reserved.
    5  *
    6  * Permission is hereby granted, free of charge, to any person obtaining a
    7  * copy of this software and associated documentation files (the "Software"),
    8  * to deal in the Software without restriction, including without limitation
    9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   10  * and/or sell copies of the Software, and to permit persons to whom the
   11  * Software is furnished to do so, subject to the following conditions:
   12  *
   13  * The above copyright notice and this permission notice (including the next
   14  * paragraph) shall be included in all copies or substantial portions of the
   15  * Software.
   16  *
   17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   20  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
   21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
   22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
   23  * OTHER DEALINGS IN THE SOFTWARE.
   24  *
   25  * Authors:
   26  *    Rickard E. (Rik) Faith <faith@valinux.com>
   27  *    Gareth Hughes <gareth@valinux.com>
   28  *
   29  */
   30 
   31 #include <sys/cdefs.h>
   32 __FBSDID("$FreeBSD: releng/9.0/sys/dev/drm/drm_drawable.c 183834 2008-10-13 18:06:33Z rnoland $");
   33 
   34 /** @file drm_drawable.c
   35  * This file implements ioctls to store information along with DRM drawables,
   36  * such as the current set of cliprects for vblank-synced buffer swaps.
   37  */
   38 
   39 #include "dev/drm/drmP.h"
   40 
   41 struct bsd_drm_drawable_info {
   42         struct drm_drawable_info info;
   43         int handle;
   44         RB_ENTRY(bsd_drm_drawable_info) tree;
   45 };
   46 
   47 static int
   48 drm_drawable_compare(struct bsd_drm_drawable_info *a,
   49     struct bsd_drm_drawable_info *b)
   50 {
   51         if (a->handle > b->handle)
   52                 return 1;
   53         if (a->handle < b->handle)
   54                 return -1;
   55         return 0;
   56 }
   57 
   58 RB_GENERATE_STATIC(drawable_tree, bsd_drm_drawable_info, tree,
   59     drm_drawable_compare);
   60 
   61 struct drm_drawable_info *
   62 drm_get_drawable_info(struct drm_device *dev, int handle)
   63 {
   64         struct bsd_drm_drawable_info find, *result;
   65 
   66         find.handle = handle;
   67         result = RB_FIND(drawable_tree, &dev->drw_head, &find);
   68 
   69         return &result->info;
   70 }
   71 
   72 int drm_adddraw(struct drm_device *dev, void *data, struct drm_file *file_priv)
   73 {
   74         struct drm_draw *draw = data;
   75         struct bsd_drm_drawable_info *info;
   76 
   77         info = malloc(sizeof(struct bsd_drm_drawable_info), DRM_MEM_DRAWABLE,
   78             M_NOWAIT | M_ZERO);
   79         if (info == NULL)
   80                 return ENOMEM;
   81 
   82         info->handle = alloc_unr(dev->drw_unrhdr);
   83         DRM_SPINLOCK(&dev->drw_lock);
   84         RB_INSERT(drawable_tree, &dev->drw_head, info);
   85         draw->handle = info->handle;
   86         DRM_SPINUNLOCK(&dev->drw_lock);
   87 
   88         DRM_DEBUG("%d\n", draw->handle);
   89 
   90         return 0;
   91 }
   92 
   93 int drm_rmdraw(struct drm_device *dev, void *data, struct drm_file *file_priv)
   94 {
   95         struct drm_draw *draw = (struct drm_draw *)data;
   96         struct drm_drawable_info *info;
   97 
   98         DRM_SPINLOCK(&dev->drw_lock);
   99         info = drm_get_drawable_info(dev, draw->handle);
  100         if (info != NULL) {
  101                 RB_REMOVE(drawable_tree, &dev->drw_head,
  102                     (struct bsd_drm_drawable_info *)info);
  103                 DRM_SPINUNLOCK(&dev->drw_lock);
  104                 free_unr(dev->drw_unrhdr, draw->handle);
  105                 free(info->rects, DRM_MEM_DRAWABLE);
  106                 free(info, DRM_MEM_DRAWABLE);
  107                 return 0;
  108         } else {
  109                 DRM_SPINUNLOCK(&dev->drw_lock);
  110                 return EINVAL;
  111         }
  112 }
  113 
  114 int drm_update_draw(struct drm_device *dev, void *data,
  115                     struct drm_file *file_priv)
  116 {
  117         struct drm_drawable_info *info;
  118         struct drm_update_draw *update = (struct drm_update_draw *)data;
  119         int ret;
  120 
  121         info = drm_get_drawable_info(dev, update->handle);
  122         if (info == NULL)
  123                 return EINVAL;
  124 
  125         switch (update->type) {
  126         case DRM_DRAWABLE_CLIPRECTS:
  127                 DRM_SPINLOCK(&dev->drw_lock);
  128                 if (update->num != info->num_rects) {
  129                         free(info->rects, DRM_MEM_DRAWABLE);
  130                         info->rects = NULL;
  131                         info->num_rects = 0;
  132                 }
  133                 if (update->num == 0) {
  134                         DRM_SPINUNLOCK(&dev->drw_lock);
  135                         return 0;
  136                 }
  137                 if (info->rects == NULL) {
  138                         info->rects = malloc(sizeof(*info->rects) *
  139                             update->num, DRM_MEM_DRAWABLE, M_NOWAIT);
  140                         if (info->rects == NULL) {
  141                                 DRM_SPINUNLOCK(&dev->drw_lock);
  142                                 return ENOMEM;
  143                         }
  144                         info->num_rects = update->num;
  145                 }
  146                 /* For some reason the pointer arg is unsigned long long. */
  147                 ret = copyin((void *)(intptr_t)update->data, info->rects,
  148                     sizeof(*info->rects) * info->num_rects);
  149                 DRM_SPINUNLOCK(&dev->drw_lock);
  150                 return ret;
  151         default:
  152                 return EINVAL;
  153         }
  154 }
  155 
  156 void drm_drawable_free_all(struct drm_device *dev)
  157 {
  158         struct bsd_drm_drawable_info *info, *next;
  159 
  160         DRM_SPINLOCK(&dev->drw_lock);
  161         for (info = RB_MIN(drawable_tree, &dev->drw_head);
  162             info != NULL ; info = next) {
  163                 next = RB_NEXT(drawable_tree, &dev->drw_head, info);
  164                 RB_REMOVE(drawable_tree, &dev->drw_head,
  165                     (struct bsd_drm_drawable_info *)info);
  166                 DRM_SPINUNLOCK(&dev->drw_lock);
  167                 free_unr(dev->drw_unrhdr, info->handle);
  168                 free(info->info.rects, DRM_MEM_DRAWABLE);
  169                 free(info, DRM_MEM_DRAWABLE);
  170                 DRM_SPINLOCK(&dev->drw_lock);
  171         }
  172         DRM_SPINUNLOCK(&dev->drw_lock);
  173 }

Cache object: 4ddb5fa2071d0e25f22346ce5114e379

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FreeBSD/Linux Kernel Cross Reference sys/dev/drm/drm_drawable.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/drm/drm_drawable.c