1/** 2 * \file drm_drawable.c 3 * IOCTLs for drawables 4 * 5 * \author Rickard E. (Rik) Faith <faith@valinux.com> 6 * \author Gareth Hughes <gareth@valinux.com> 7 * \author Michel D��nzer <michel@tungstengraphics.com> 8 */ 9 10/* 11 * Created: Tue Feb 2 08:37:54 1999 by faith@valinux.com 12 * 13 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 14 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 15 * Copyright 2006 Tungsten Graphics, Inc., Bismarck, North Dakota. 16 * All Rights Reserved. 17 * 18 * Permission is hereby granted, free of charge, to any person obtaining a 19 * copy of this software and associated documentation files (the "Software"), 20 * to deal in the Software without restriction, including without limitation 21 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 22 * and/or sell copies of the Software, and to permit persons to whom the 23 * Software is furnished to do so, subject to the following conditions: 24 * 25 * The above copyright notice and this permission notice (including the next 26 * paragraph) shall be included in all copies or substantial portions of the 27 * Software. 28 * 29 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 30 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 31 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 32 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 33 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 34 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 35 * OTHER DEALINGS IN THE SOFTWARE. 36 */ 37 38#include "drmP.h" 39 40/** 41 * Allocate drawable ID and memory to store information about it. 42 */ 43int drm_adddraw(struct drm_device *dev, void *data, struct drm_file *file_priv) 44{ 45 unsigned long irqflags; 46 struct drm_draw *draw = data; 47 int new_id = 0; 48 int ret; 49 50again: 51 if (idr_pre_get(&dev->drw_idr, GFP_KERNEL) == 0) { 52 DRM_ERROR("Out of memory expanding drawable idr\n"); 53 return -ENOMEM; 54 } 55 56 spin_lock_irqsave(&dev->drw_lock, irqflags); 57 ret = idr_get_new_above(&dev->drw_idr, NULL, 1, &new_id); 58 if (ret == -EAGAIN) { 59 spin_unlock_irqrestore(&dev->drw_lock, irqflags); 60 goto again; 61 } 62 63 spin_unlock_irqrestore(&dev->drw_lock, irqflags); 64 65 draw->handle = new_id; 66 67 DRM_DEBUG("%d\n", draw->handle); 68 69 return 0; 70} 71 72/** 73 * Free drawable ID and memory to store information about it. 74 */ 75int drm_rmdraw(struct drm_device *dev, void *data, struct drm_file *file_priv) 76{ 77 struct drm_draw *draw = data; 78 unsigned long irqflags; 79 struct drm_drawable_info *info; 80 81 spin_lock_irqsave(&dev->drw_lock, irqflags); 82 83 info = drm_get_drawable_info(dev, draw->handle); 84 if (info == NULL) { 85 spin_unlock_irqrestore(&dev->drw_lock, irqflags); 86 return -EINVAL; 87 } 88 kfree(info->rects); 89 kfree(info); 90 91 idr_remove(&dev->drw_idr, draw->handle); 92 93 spin_unlock_irqrestore(&dev->drw_lock, irqflags); 94 DRM_DEBUG("%d\n", draw->handle); 95 return 0; 96} 97 98int drm_update_drawable_info(struct drm_device *dev, void *data, struct drm_file *file_priv) 99{ 100 struct drm_update_draw *update = data; 101 unsigned long irqflags; 102 struct drm_clip_rect *rects; 103 struct drm_drawable_info *info; 104 int err; 105 106 info = idr_find(&dev->drw_idr, update->handle); 107 if (!info) { 108 info = kzalloc(sizeof(*info), GFP_KERNEL); 109 if (!info) 110 return -ENOMEM; 111 if (IS_ERR(idr_replace(&dev->drw_idr, info, update->handle))) { 112 DRM_ERROR("No such drawable %d\n", update->handle); 113 kfree(info); 114 return -EINVAL; 115 } 116 } 117 118 switch (update->type) { 119 case DRM_DRAWABLE_CLIPRECTS: 120 if (update->num == 0) 121 rects = NULL; 122 else if (update->num != info->num_rects) { 123 rects = kmalloc(update->num * 124 sizeof(struct drm_clip_rect), 125 GFP_KERNEL); 126 } else 127 rects = info->rects; 128 129 if (update->num && !rects) { 130 DRM_ERROR("Failed to allocate cliprect memory\n"); 131 err = -ENOMEM; 132 goto error; 133 } 134 135 if (update->num && DRM_COPY_FROM_USER(rects, 136 (struct drm_clip_rect __user *) 137 (unsigned long)update->data, 138 update->num * 139 sizeof(*rects))) { 140 DRM_ERROR("Failed to copy cliprects from userspace\n"); 141 err = -EFAULT; 142 goto error; 143 } 144 145 spin_lock_irqsave(&dev->drw_lock, irqflags); 146 147 if (rects != info->rects) { 148 kfree(info->rects); 149 } 150 151 info->rects = rects; 152 info->num_rects = update->num; 153 154 spin_unlock_irqrestore(&dev->drw_lock, irqflags); 155 156 DRM_DEBUG("Updated %d cliprects for drawable %d\n", 157 info->num_rects, update->handle); 158 break; 159 default: 160 DRM_ERROR("Invalid update type %d\n", update->type); 161 return -EINVAL; 162 } 163 164 return 0; 165 166error: 167 if (rects != info->rects) 168 kfree(rects); 169 170 return err; 171} 172 173/** 174 * Caller must hold the drawable spinlock! 175 */ 176struct drm_drawable_info *drm_get_drawable_info(struct drm_device *dev, drm_drawable_t id) 177{ 178 return idr_find(&dev->drw_idr, id); 179} 180EXPORT_SYMBOL(drm_get_drawable_info); 181 182static int drm_drawable_free(int idr, void *p, void *data) 183{ 184 struct drm_drawable_info *info = p; 185 186 if (info) { 187 kfree(info->rects); 188 kfree(info); 189 } 190 191 return 0; 192} 193 194void drm_drawable_free_all(struct drm_device *dev) 195{ 196 idr_for_each(&dev->drw_idr, drm_drawable_free, NULL); 197 idr_remove_all(&dev->drw_idr); 198} 199