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![Eric Anholt](/assets/img/avatar_default.png)
The data is now in kernel space, copied in/out as appropriate according to t This results in DRM_COPY_{TO,FROM}_USER going away, and error paths to deal with those failures. This also means that XFree86 4.2.0 support for i810 DR is lost. Signed-off-by: Dave Airlie <airlied@linux.ie>
192 lines
5.2 KiB
C
192 lines
5.2 KiB
C
/**
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* \file drm_drawable.c
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* IOCTLs for drawables
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*
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* \author Rickard E. (Rik) Faith <faith@valinux.com>
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* \author Gareth Hughes <gareth@valinux.com>
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* \author Michel Dänzer <michel@tungstengraphics.com>
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*/
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/*
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* Created: Tue Feb 2 08:37:54 1999 by faith@valinux.com
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*
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* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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* Copyright 2006 Tungsten Graphics, Inc., Bismarck, North Dakota.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "drmP.h"
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/**
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* Allocate drawable ID and memory to store information about it.
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*/
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int drm_adddraw(struct drm_device *dev, void *data, struct drm_file *file_priv)
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{
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unsigned long irqflags;
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struct drm_draw *draw = data;
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int new_id = 0;
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int ret;
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again:
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if (idr_pre_get(&dev->drw_idr, GFP_KERNEL) == 0) {
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DRM_ERROR("Out of memory expanding drawable idr\n");
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return -ENOMEM;
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}
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spin_lock_irqsave(&dev->drw_lock, irqflags);
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ret = idr_get_new_above(&dev->drw_idr, NULL, 1, &new_id);
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if (ret == -EAGAIN) {
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spin_unlock_irqrestore(&dev->drw_lock, irqflags);
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goto again;
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}
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spin_unlock_irqrestore(&dev->drw_lock, irqflags);
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draw->handle = new_id;
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DRM_DEBUG("%d\n", draw->handle);
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return 0;
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}
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/**
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* Free drawable ID and memory to store information about it.
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*/
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int drm_rmdraw(struct drm_device *dev, void *data, struct drm_file *file_priv)
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{
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struct drm_draw *draw = data;
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unsigned long irqflags;
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spin_lock_irqsave(&dev->drw_lock, irqflags);
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drm_free(drm_get_drawable_info(dev, draw->handle),
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sizeof(struct drm_drawable_info), DRM_MEM_BUFS);
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idr_remove(&dev->drw_idr, draw->handle);
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spin_unlock_irqrestore(&dev->drw_lock, irqflags);
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DRM_DEBUG("%d\n", draw->handle);
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return 0;
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}
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int drm_update_drawable_info(struct drm_device *dev, void *data, struct drm_file *file_priv)
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{
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struct drm_update_draw *update = data;
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unsigned long irqflags;
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struct drm_clip_rect *rects;
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struct drm_drawable_info *info;
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int err;
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info = idr_find(&dev->drw_idr, update->handle);
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if (!info) {
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info = drm_calloc(1, sizeof(*info), DRM_MEM_BUFS);
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if (!info)
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return -ENOMEM;
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if (IS_ERR(idr_replace(&dev->drw_idr, info, update->handle))) {
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DRM_ERROR("No such drawable %d\n", update->handle);
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drm_free(info, sizeof(*info), DRM_MEM_BUFS);
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return -EINVAL;
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}
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}
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switch (update->type) {
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case DRM_DRAWABLE_CLIPRECTS:
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if (update->num != info->num_rects) {
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rects = drm_alloc(update->num * sizeof(struct drm_clip_rect),
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DRM_MEM_BUFS);
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} else
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rects = info->rects;
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if (update->num && !rects) {
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DRM_ERROR("Failed to allocate cliprect memory\n");
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err = -ENOMEM;
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goto error;
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}
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if (update->num && DRM_COPY_FROM_USER(rects,
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(struct drm_clip_rect __user *)
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(unsigned long)update->data,
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update->num *
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sizeof(*rects))) {
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DRM_ERROR("Failed to copy cliprects from userspace\n");
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err = -EFAULT;
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goto error;
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}
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spin_lock_irqsave(&dev->drw_lock, irqflags);
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if (rects != info->rects) {
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drm_free(info->rects, info->num_rects *
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sizeof(struct drm_clip_rect), DRM_MEM_BUFS);
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}
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info->rects = rects;
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info->num_rects = update->num;
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spin_unlock_irqrestore(&dev->drw_lock, irqflags);
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DRM_DEBUG("Updated %d cliprects for drawable %d\n",
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info->num_rects, update->handle);
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break;
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default:
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DRM_ERROR("Invalid update type %d\n", update->type);
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return -EINVAL;
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}
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return 0;
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error:
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if (rects != info->rects)
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drm_free(rects, update->num * sizeof(struct drm_clip_rect),
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DRM_MEM_BUFS);
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return err;
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}
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/**
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* Caller must hold the drawable spinlock!
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*/
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struct drm_drawable_info *drm_get_drawable_info(struct drm_device *dev, drm_drawable_t id)
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{
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return idr_find(&dev->drw_idr, id);
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}
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EXPORT_SYMBOL(drm_get_drawable_info);
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static int drm_drawable_free(int idr, void *p, void *data)
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{
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struct drm_drawable_info *info = p;
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if (info) {
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drm_free(info->rects, info->num_rects *
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sizeof(struct drm_clip_rect), DRM_MEM_BUFS);
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drm_free(info, sizeof(*info), DRM_MEM_BUFS);
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}
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return 0;
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}
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void drm_drawable_free_all(struct drm_device *dev)
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{
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idr_for_each(&dev->drw_idr, drm_drawable_free, NULL);
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idr_remove_all(&dev->drw_idr);
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}
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