sys/dev/drm/drm_drawable.c

   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 /** @file drm_drawable.c
  32  * This file implements ioctls to store information along with DRM drawables,
  33  * such as the current set of cliprects for vblank-synced buffer swaps.
  34  */
  35
  36 #include "dev/drm/drmP.h"
  37
  38 struct bsd_drm_drawable_info {
  39         struct drm_drawable_info info;
  40         int handle;
  41         RB_ENTRY(bsd_drm_drawable_info) tree;
  42 };
  43
  44 static int
  45 drm_drawable_compare(struct bsd_drm_drawable_info *a,
  46     struct bsd_drm_drawable_info *b)
  47 {
  48         if (a->handle > b->handle)
  49                 return 1;
  50         if (a->handle < b->handle)
  51                 return -1;
  52         return 0;
  53 }
  54
  55 RB_PROTOTYPE_STATIC(drawable_tree, bsd_drm_drawable_info, tree,
  56     drm_drawable_compare);
  57 RB_GENERATE_STATIC(drawable_tree, bsd_drm_drawable_info, tree,
  58     drm_drawable_compare);
  59
  60 struct drm_drawable_info *
  61 drm_get_drawable_info(struct drm_device *dev, int handle)
  62 {
  63         struct bsd_drm_drawable_info find, *result;
  64
  65         find.handle = handle;
  66         result = RB_FIND(drawable_tree, &dev->drw_head, &find);
  67
  68         return &result->info;
  69 }
  70
  71 int drm_adddraw(struct drm_device *dev, void *data, struct drm_file *file_priv)
  72 {
  73         struct drm_draw *draw = data;
  74         struct bsd_drm_drawable_info *info;
  75
  76         info = malloc(sizeof(struct bsd_drm_drawable_info), DRM_MEM_DRAWABLE,
  77             M_NOWAIT | M_ZERO);
  78         if (info == NULL)
  79                 return ENOMEM;
  80
  81         /*
  82          * XXX Only valid for sizeof(int) == sizeof(void *)
  83          */
  84         info->handle = (intptr_t)info;
  85
  86         DRM_SPINLOCK(&dev->drw_lock);
  87         RB_INSERT(drawable_tree, &dev->drw_head, info);
  88         draw->handle = info->handle;
  89         DRM_SPINUNLOCK(&dev->drw_lock);
  90
  91         DRM_DEBUG("%d\n", draw->handle);
  92
  93         return 0;
  94 }
  95
  96 int drm_rmdraw(struct drm_device *dev, void *data, struct drm_file *file_priv)
  97 {
  98         struct drm_draw *draw = (struct drm_draw *)data;
  99         struct drm_drawable_info *info;
 100
 101         DRM_SPINLOCK(&dev->drw_lock);
 102         info = drm_get_drawable_info(dev, draw->handle);
 103         if (info != NULL) {
 104                 RB_REMOVE(drawable_tree, &dev->drw_head,
 105                     (struct bsd_drm_drawable_info *)info);
 106                 DRM_SPINUNLOCK(&dev->drw_lock);
 107                 free(info->rects, DRM_MEM_DRAWABLE);
 108                 free(info, DRM_MEM_DRAWABLE);
 109                 return 0;
 110         } else {
 111                 DRM_SPINUNLOCK(&dev->drw_lock);
 112                 return EINVAL;
 113         }
 114 }
 115
 116 int drm_update_draw(struct drm_device *dev, void *data,
 117                     struct drm_file *file_priv)
 118 {
 119         struct drm_drawable_info *info;
 120         struct drm_update_draw *update = (struct drm_update_draw *)data;
 121         int ret;
 122
 123         info = drm_get_drawable_info(dev, update->handle);
 124         if (info == NULL)
 125                 return EINVAL;
 126
 127         switch (update->type) {
 128         case DRM_DRAWABLE_CLIPRECTS:
 129                 DRM_SPINLOCK(&dev->drw_lock);
 130                 if (update->num != info->num_rects) {
 131                         free(info->rects, DRM_MEM_DRAWABLE);
 132                         info->rects = NULL;
 133                         info->num_rects = 0;
 134                 }
 135                 if (update->num == 0) {
 136                         DRM_SPINUNLOCK(&dev->drw_lock);
 137                         return 0;
 138                 }
 139                 if (info->rects == NULL) {
 140                         info->rects = malloc(sizeof(*info->rects) *
 141                             update->num, DRM_MEM_DRAWABLE, M_NOWAIT);
 142                         if (info->rects == NULL) {
 143                                 DRM_SPINUNLOCK(&dev->drw_lock);
 144                                 return ENOMEM;
 145                         }
 146                         info->num_rects = update->num;
 147                 }
 148                 /* For some reason the pointer arg is unsigned long long. */
 149                 ret = copyin((void *)(intptr_t)update->data, info->rects,
 150                     sizeof(*info->rects) * info->num_rects);
 151                 DRM_SPINUNLOCK(&dev->drw_lock);
 152                 return ret;
 153         default:
 154                 return EINVAL;
 155         }
 156 }
 157
 158 void drm_drawable_free_all(struct drm_device *dev)
 159 {
 160         struct bsd_drm_drawable_info *info, *next;
 161
 162         DRM_SPINLOCK(&dev->drw_lock);
 163         for (info = RB_MIN(drawable_tree, &dev->drw_head);
 164             info != NULL ; info = next) {
 165                 next = RB_NEXT(drawable_tree, &dev->drw_head, info);
 166                 RB_REMOVE(drawable_tree, &dev->drw_head,
 167                     (struct bsd_drm_drawable_info *)info);
 168                 DRM_SPINUNLOCK(&dev->drw_lock);
 169                 free(info->info.rects, DRM_MEM_DRAWABLE);
 170                 free(info, DRM_MEM_DRAWABLE);
 171                 DRM_SPINLOCK(&dev->drw_lock);
 172         }
 173         DRM_SPINUNLOCK(&dev->drw_lock);
 174 }