sys/external/bsd/drm/dist/bsd-core/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 "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_GENERATE_STATIC(drawable_tree, bsd_drm_drawable_info, tree,
  56     drm_drawable_compare);
  57
  58 struct drm_drawable_info *
  59 drm_get_drawable_info(struct drm_device *dev, int handle)
  60 {
  61         struct bsd_drm_drawable_info find, *result;
  62
  63         find.handle = handle;
  64         result = RB_FIND(drawable_tree, &dev->drw_head, &find);
  65
  66         return &result->info;
  67 }
  68
  69 int drm_adddraw(struct drm_device *dev, void *data, struct drm_file *file_priv)
  70 {
  71         struct drm_draw *draw = data;
  72         struct bsd_drm_drawable_info *info;
  73
  74         info = malloc(sizeof(struct bsd_drm_drawable_info), DRM_MEM_DRAWABLE,
  75             M_NOWAIT | M_ZERO);
  76         if (info == NULL)
  77                 return ENOMEM;
  78
  79 #if defined(__FreeBSD__)
  80         info->handle = alloc_unr(dev->drw_unrhdr);
  81 #endif
  82         DRM_SPINLOCK(&dev->drw_lock);
  83 #if defined(__NetBSD__)
  84         info->handle = ++dev->drw_no;
  85 #endif
  86         RB_INSERT(drawable_tree, &dev->drw_head, info);
  87         draw->handle = info->handle;
  88         DRM_SPINUNLOCK(&dev->drw_lock);
  89
  90         DRM_DEBUG("%d\n", draw->handle);
  91
  92         return 0;
  93 }
  94
  95 int drm_rmdraw(struct drm_device *dev, void *data, struct drm_file *file_priv)
  96 {
  97         struct drm_draw *draw = (struct drm_draw *)data;
  98         struct drm_drawable_info *info;
  99
 100         DRM_SPINLOCK(&dev->drw_lock);
 101         info = drm_get_drawable_info(dev, draw->handle);
 102         if (info != NULL) {
 103                 RB_REMOVE(drawable_tree, &dev->drw_head,
 104                     (struct bsd_drm_drawable_info *)info);
 105                 DRM_SPINUNLOCK(&dev->drw_lock);
 106 #if defined(__FreeBSD__)
 107                 free_unr(dev->drw_unrhdr, draw->handle);
 108 #endif
 109                 if (info->rects)
 110                         free(info->rects, DRM_MEM_DRAWABLE);
 111                 free(info, DRM_MEM_DRAWABLE);
 112                 return 0;
 113         } else {
 114                 DRM_SPINUNLOCK(&dev->drw_lock);
 115                 return EINVAL;
 116         }
 117 }
 118
 119 int drm_update_draw(struct drm_device *dev, void *data,
 120                     struct drm_file *file_priv)
 121 {
 122         struct drm_drawable_info *info;
 123         struct drm_update_draw *update = (struct drm_update_draw *)data;
 124         int ret;
 125
 126         info = drm_get_drawable_info(dev, update->handle);
 127         if (info == NULL)
 128                 return EINVAL;
 129
 130         switch (update->type) {
 131         case DRM_DRAWABLE_CLIPRECTS:
 132                 DRM_SPINLOCK(&dev->drw_lock);
 133                 if (update->num != info->num_rects) {
 134                         if (info->rects)
 135                                 free(info->rects, DRM_MEM_DRAWABLE);
 136                         info->rects = NULL;
 137                         info->num_rects = 0;
 138                 }
 139                 if (update->num == 0) {
 140                         DRM_SPINUNLOCK(&dev->drw_lock);
 141                         return 0;
 142                 }
 143                 if (info->rects == NULL) {
 144                         info->rects = malloc(sizeof(*info->rects) *
 145                             update->num, DRM_MEM_DRAWABLE, M_NOWAIT);
 146                         if (info->rects == NULL) {
 147                                 DRM_SPINUNLOCK(&dev->drw_lock);
 148                                 return ENOMEM;
 149                         }
 150                         info->num_rects = update->num;
 151                 }
 152                 /* For some reason the pointer arg is unsigned long long. */
 153                 ret = copyin((void *)(intptr_t)update->data, info->rects,
 154                     sizeof(*info->rects) * info->num_rects);
 155                 DRM_SPINUNLOCK(&dev->drw_lock);
 156                 return ret;
 157         default:
 158                 return EINVAL;
 159         }
 160 }
 161
 162 void drm_drawable_free_all(struct drm_device *dev)
 163 {
 164         struct bsd_drm_drawable_info *info, *next;
 165
 166         DRM_SPINLOCK(&dev->drw_lock);
 167         for (info = RB_MIN(drawable_tree, &dev->drw_head);
 168             info != NULL ; info = next) {
 169                 next = RB_NEXT(drawable_tree, &dev->drw_head, info);
 170                 RB_REMOVE(drawable_tree, &dev->drw_head,
 171                     (struct bsd_drm_drawable_info *)info);
 172                 DRM_SPINUNLOCK(&dev->drw_lock);
 173 #if defined(__FreeBSD__)
 174                 free_unr(dev->drw_unrhdr, info->handle);
 175 #endif
 176                 if (info->info.rects)
 177                         free(info->info.rects, DRM_MEM_DRAWABLE);
 178                 free(info, DRM_MEM_DRAWABLE);
 179                 DRM_SPINLOCK(&dev->drw_lock);
 180         }
 181         DRM_SPINUNLOCK(&dev->drw_lock);
 182 }