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  * $DragonFly: src/sys/dev/drm/drm_drawable.c,v 1.1 2008/04/05 18:12:29 hasso 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 "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 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(drm_device_t *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(drm_device_t *dev, void *data, struct drm_file *file_priv)
  72 {
  73         drm_draw_t *draw = data;
  74         struct bsd_drm_drawable_info *info;
  75
  76         info = drm_calloc(1, sizeof(struct bsd_drm_drawable_info),
  77             DRM_MEM_DRAWABLE);
  78         if (info == NULL)
  79                 return ENOMEM;
  80
  81 #ifdef __FreeBSD__
  82         info->handle = alloc_unr(dev->drw_unrhdr);
  83 #else
  84         /*
  85          * XXX Only valid for sizeof(int) == sizeof(void *)
  86          */
  87         info->handle = (int)info;
  88 #endif
  89         DRM_SPINLOCK(&dev->drw_lock);
  90         RB_INSERT(drawable_tree, &dev->drw_head, info);
  91         draw->handle = info->handle;
  92         DRM_SPINUNLOCK(&dev->drw_lock);
  93
  94         DRM_DEBUG("%d\n", draw->handle);
  95
  96         return 0;
  97 }
  98
  99 int drm_rmdraw(drm_device_t *dev, void *data, struct drm_file *file_priv)
 100 {
 101         drm_draw_t *draw = (drm_draw_t *)data;
 102         struct drm_drawable_info *info;
 103
 104         DRM_SPINLOCK(&dev->drw_lock);
 105         info = drm_get_drawable_info(dev, draw->handle);
 106         if (info != NULL) {
 107                 RB_REMOVE(drawable_tree, &dev->drw_head,
 108                     (struct bsd_drm_drawable_info *)info);
 109                 DRM_SPINUNLOCK(&dev->drw_lock);
 110 #ifdef __FreeBSD__
 111                 free_unr(dev->drw_unrhdr, draw->handle);
 112 #endif
 113                 drm_free(info, sizeof(struct bsd_drm_drawable_info),
 114                     DRM_MEM_DRAWABLE);
 115                 return 0;
 116         } else {
 117                 DRM_SPINUNLOCK(&dev->drw_lock);
 118                 return EINVAL;
 119         }
 120 }
 121
 122 int drm_update_draw(drm_device_t *dev, void *data, struct drm_file *file_priv)
 123 {
 124         struct drm_drawable_info *info;
 125         struct drm_update_draw *update = (struct drm_update_draw *)data;
 126         int ret;
 127
 128         info = drm_get_drawable_info(dev, update->handle);
 129         if (info == NULL)
 130                 return EINVAL;
 131
 132         switch (update->type) {
 133         case DRM_DRAWABLE_CLIPRECTS:
 134                 DRM_SPINLOCK(&dev->drw_lock);
 135                 if (update->num != info->num_rects) {
 136                         drm_free(info->rects,
 137                             sizeof(*info->rects) * info->num_rects,
 138                             DRM_MEM_DRAWABLE);
 139                         info->rects = NULL;
 140                         info->num_rects = 0;
 141                 }
 142                 if (update->num == 0) {
 143                         DRM_SPINUNLOCK(&dev->drw_lock);
 144                         return 0;
 145                 }
 146                 if (info->rects == NULL) {
 147                         info->rects = drm_alloc(sizeof(*info->rects) *
 148                             update->num, DRM_MEM_DRAWABLE);
 149                         if (info->rects == NULL)
 150                                 return ENOMEM;
 151                         info->num_rects = update->num;
 152                 }
 153                 /* For some reason the pointer arg is unsigned long long. */
 154                 ret = copyin((void *)(intptr_t)update->data, info->rects,
 155                     sizeof(*info->rects) * info->num_rects);
 156                 DRM_SPINUNLOCK(&dev->drw_lock);
 157                 return ret;
 158         default:
 159                 return EINVAL;
 160         }
 161 }