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drm: replace drawable ioctl by noops 

The information supplied by userspace through these ioctls is only
accessible by dev->drw_idr. But there's no in-tree user of that.
Also userspace does not really care about return values of these ioctls,
either. Only hw/xfree86/dri/dri.c from the xserver actually checks the
return from adddraw and keeps on trying to create a kernel drawable
every time somebody creates a dri drawable. But since that's now a noop,
who cares.

Therefore it's safe to replace these three ioctls with noops and rip
out the implementation.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>
Reviewed-by: Michel Dänzer <michel@daenzer.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Daniel Vetter 2010-08-23 22:53:31 +02:00 committed by Dave Airlie
parent 4ac5ec40ec
commit 8f879194f8
5 changed files with 4 additions and 221 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/Makefile
View File

@ -5,7 +5,7 @@
ccflags-y := -Iinclude/drm
drm-y := drm_auth.o drm_buffer.o drm_bufs.o drm_cache.o \
drm_context.o drm_dma.o drm_drawable.o \
drm_context.o drm_dma.o \
drm_drv.o drm_fops.o drm_gem.o drm_ioctl.o drm_irq.o \
drm_lock.o drm_memory.o drm_proc.o drm_stub.o drm_vm.o \
drm_agpsupport.o drm_scatter.o ati_pcigart.o drm_pci.o \

197
drivers/gpu/drm/drm_drawable.c
View File

@ -1,197 +0,0 @@
/**
* \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!
*/
static struct drm_drawable_info *drm_get_drawable_info(struct drm_device *dev, drm_drawable_t id)
{
return idr_find(&dev->drw_idr, id);
}
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);
}

8
drivers/gpu/drm/drm_drv.c
View File

@ -91,8 +91,8 @@ static struct drm_ioctl_desc drm_ioctls[] = {
DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_adddraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_rmdraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
@ -127,7 +127,7 @@ static struct drm_ioctl_desc drm_ioctls[] = {
DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_update_drawable_info, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED),
DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
@ -180,8 +180,6 @@ int drm_lastclose(struct drm_device * dev)
mutex_lock(&dev->struct_mutex);
/* Free drawable information memory */
drm_drawable_free_all(dev);
del_timer(&dev->timer);
/* Clear AGP information */

3
drivers/gpu/drm/drm_stub.c
View File

@ -240,14 +240,11 @@ int drm_fill_in_dev(struct drm_device *dev,
INIT_LIST_HEAD(&dev->vblank_event_list);
spin_lock_init(&dev->count_lock);
spin_lock_init(&dev->drw_lock);
spin_lock_init(&dev->event_lock);
init_timer(&dev->timer);
mutex_init(&dev->struct_mutex);
mutex_init(&dev->ctxlist_mutex);
idr_init(&dev->drw_idr);
if (drm_ht_create(&dev->map_hash, 12)) {
return -ENOMEM;
}

15
include/drm/drmP.h
View File

@ -1037,12 +1037,6 @@ struct drm_device {
struct drm_minor *control; /**< Control node for card */
struct drm_minor *primary; /**< render type primary screen head */
/** \name Drawable information */
/*@{ */
spinlock_t drw_lock;
struct idr drw_idr;
/*@} */
struct drm_mode_config mode_config; /**< Current mode config */
/** \name GEM information */
@ -1229,15 +1223,6 @@ extern int drm_setsareactx(struct drm_device *dev, void *data,
extern int drm_getsareactx(struct drm_device *dev, void *data,
struct drm_file *file_priv);
/* Drawable IOCTL support (drm_drawable.h) */
extern int drm_adddraw(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int drm_rmdraw(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int drm_update_drawable_info(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern void drm_drawable_free_all(struct drm_device *dev);
/* Authentication IOCTL support (drm_auth.h) */
extern int drm_getmagic(struct drm_device *dev, void *data,
struct drm_file *file_priv);