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/**
* \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(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
unsigned long irqflags;
struct drm_draw draw;
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);
DRM_COPY_TO_USER_IOCTL((struct drm_draw __user *)data, draw, sizeof(draw));
return 0;
}
/**
* Free drawable ID and memory to store information about it.
*/
int drm_rmdraw(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
struct drm_draw draw;
unsigned long irqflags;
DRM_COPY_FROM_USER_IOCTL(draw, (struct drm_draw __user *) data,
sizeof(draw));
spin_lock_irqsave(&dev->drw_lock, irqflags);
drm_free(drm_get_drawable_info(dev, draw.handle),
sizeof(struct drm_drawable_info), DRM_MEM_BUFS);
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(DRM_IOCTL_ARGS)
{
DRM_DEVICE;
struct drm_update_draw update;
unsigned long irqflags;
struct drm_clip_rect *rects;
struct drm_drawable_info *info;
int err;
DRM_COPY_FROM_USER_IOCTL(update, (struct drm_update_draw __user *) data,
sizeof(update));
info = idr_find(&dev->drw_idr, update.handle);
if (!info) {
info = drm_calloc(1, sizeof(*info), DRM_MEM_BUFS);
if (!info)
return -ENOMEM;
if (IS_ERR(idr_replace(&dev->drw_idr, info, update.handle))) {
DRM_ERROR("No such drawable %d\n", update.handle);
drm_free(info, sizeof(*info), DRM_MEM_BUFS);
return -EINVAL;
}
}
switch (update.type) {
case DRM_DRAWABLE_CLIPRECTS:
if (update.num != info->num_rects) {
rects = drm_alloc(update.num * sizeof(struct drm_clip_rect),
DRM_MEM_BUFS);
} 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) {
drm_free(info->rects, info->num_rects *
sizeof(struct drm_clip_rect), DRM_MEM_BUFS);
}
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)
drm_free(rects, update.num * sizeof(struct drm_clip_rect),
DRM_MEM_BUFS);
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) {
drm_free(info->rects, info->num_rects *
sizeof(struct drm_clip_rect), DRM_MEM_BUFS);
drm_free(info, sizeof(*info), DRM_MEM_BUFS);
}
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);
}
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