/** * \file drm_drawable.c * IOCTLs for drawables * * \author Rickard E. (Rik) Faith <faith@valinux.com> * \author Gareth Hughes <gareth@valinux.com> * \author Michel Dänzer <michel@tungstengraphics.com> */ /* * Created: Tue Feb 2 08:37:54 1999 by faith@valinux.com * * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. * Copyright 2006 Tungsten Graphics, Inc., Bismarck, North Dakota. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. */ #include "drmP.h" /** * Allocate drawable ID and memory to store information about it. */ int drm_adddraw(struct drm_device *dev, void *data, struct drm_file *file_priv) { unsigned long irqflags; struct drm_draw *draw = data; int new_id = 0; int ret; again: if (idr_pre_get(&dev->drw_idr, GFP_KERNEL) == 0) { DRM_ERROR("Out of memory expanding drawable idr\n"); return -ENOMEM; } spin_lock_irqsave(&dev->drw_lock, irqflags); ret = idr_get_new_above(&dev->drw_idr, NULL, 1, &new_id); if (ret == -EAGAIN) { spin_unlock_irqrestore(&dev->drw_lock, irqflags); goto again; } spin_unlock_irqrestore(&dev->drw_lock, irqflags); draw->handle = new_id; DRM_DEBUG("%d\n", draw->handle); return 0; } /** * Free drawable ID and memory to store information about it. */ int drm_rmdraw(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_draw *draw = data; unsigned long irqflags; struct drm_drawable_info *info; spin_lock_irqsave(&dev->drw_lock, irqflags); info = drm_get_drawable_info(dev, draw->handle); if (info == NULL) { spin_unlock_irqrestore(&dev->drw_lock, irqflags); return -EINVAL; } kfree(info->rects); kfree(info); idr_remove(&dev->drw_idr, draw->handle); spin_unlock_irqrestore(&dev->drw_lock, irqflags); DRM_DEBUG("%d\n", draw->handle); return 0; } int drm_update_drawable_info(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_update_draw *update = data; unsigned long irqflags; struct drm_clip_rect *rects; struct drm_drawable_info *info; int err; info = idr_find(&dev->drw_idr, update->handle); if (!info) { info = kzalloc(sizeof(*info), GFP_KERNEL); if (!info) return -ENOMEM; if (IS_ERR(idr_replace(&dev->drw_idr, info, update->handle))) { DRM_ERROR("No such drawable %d\n", update->handle); kfree(info); return -EINVAL; } } switch (update->type) { case DRM_DRAWABLE_CLIPRECTS: if (update->num == 0) rects = NULL; else if (update->num != info->num_rects) { rects = kmalloc(update->num * sizeof(struct drm_clip_rect), GFP_KERNEL); } else rects = info->rects; if (update->num && !rects) { DRM_ERROR("Failed to allocate cliprect memory\n"); err = -ENOMEM; goto error; } if (update->num && DRM_COPY_FROM_USER(rects, (struct drm_clip_rect __user *) (unsigned long)update->data, update->num * sizeof(*rects))) { DRM_ERROR("Failed to copy cliprects from userspace\n"); err = -EFAULT; goto error; } spin_lock_irqsave(&dev->drw_lock, irqflags); if (rects != info->rects) { kfree(info->rects); } info->rects = rects; info->num_rects = update->num; spin_unlock_irqrestore(&dev->drw_lock, irqflags); DRM_DEBUG("Updated %d cliprects for drawable %d\n", info->num_rects, update->handle); break; default: DRM_ERROR("Invalid update type %d\n", update->type); return -EINVAL; } return 0; error: if (rects != info->rects) kfree(rects); return err; } /** * Caller must hold the drawable spinlock! */ struct drm_drawable_info *drm_get_drawable_info(struct drm_device *dev, drm_drawable_t id) { return idr_find(&dev->drw_idr, id); } EXPORT_SYMBOL(drm_get_drawable_info); static int drm_drawable_free(int idr, void *p, void *data) { struct drm_drawable_info *info = p; if (info) { kfree(info->rects); kfree(info); } return 0; } void drm_drawable_free_all(struct drm_device *dev) { idr_for_each(&dev->drw_idr, drm_drawable_free, NULL); idr_remove_all(&dev->drw_idr); }