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  * $FreeBSD: src/sys/dev/drm2/drm_drawable.c,v 1.1 2012/05/22 11:07:44 kib Exp $
  30  */
  31
  32 /** @file drm_drawable.c
  33  * This file implements ioctls to store information along with DRM drawables,
  34  * such as the current set of cliprects for vblank-synced buffer swaps.
  35  */
  36
  37 #include <drm/drmP.h>
  38
  39 struct bsd_drm_drawable_info {
  40         struct drm_drawable_info info;
  41         int handle;
  42         RB_ENTRY(bsd_drm_drawable_info) tree;
  43 };
  44
  45 static int
  46 drm_drawable_compare(struct bsd_drm_drawable_info *a,
  47     struct bsd_drm_drawable_info *b)
  48 {
  49         if (a->handle > b->handle)
  50                 return 1;
  51         if (a->handle < b->handle)
  52                 return -1;
  53         return 0;
  54 }
  55
  56 RB_PROTOTYPE_STATIC(drawable_tree, bsd_drm_drawable_info, tree,
  57     drm_drawable_compare);
  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 = kmalloc(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         spin_lock(&dev->drw_lock);
  84         RB_INSERT(drawable_tree, &dev->drw_head, info);
  85         draw->handle = info->handle;
  86         spin_unlock(&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         spin_lock(&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                 spin_unlock(&dev->drw_lock);
 104                 free_unr(dev->drw_unrhdr, draw->handle);
 105                 drm_free(info->rects, DRM_MEM_DRAWABLE);
 106                 drm_free(info, DRM_MEM_DRAWABLE);
 107                 return 0;
 108         } else {
 109                 spin_unlock(&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                 spin_lock(&dev->drw_lock);
 128                 if (update->num != info->num_rects) {
 129                         drm_free(info->rects, DRM_MEM_DRAWABLE);
 130                         info->rects = NULL;
 131                         info->num_rects = 0;
 132                 }
 133                 if (update->num == 0) {
 134                         spin_unlock(&dev->drw_lock);
 135                         return 0;
 136                 }
 137                 if (info->rects == NULL) {
 138                         info->rects = kmalloc(sizeof(*info->rects) *
 139                             update->num, DRM_MEM_DRAWABLE, M_NOWAIT);
 140                         if (info->rects == NULL) {
 141                                 spin_unlock(&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                 spin_unlock(&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         spin_lock(&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                 spin_unlock(&dev->drw_lock);
 167                 free_unr(dev->drw_unrhdr, info->handle);
 168                 drm_free(info->info.rects, DRM_MEM_DRAWABLE);
 169                 drm_free(info, DRM_MEM_DRAWABLE);
 170                 spin_lock(&dev->drw_lock);
 171         }
 172         spin_unlock(&dev->drw_lock);
 173 }