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![Daniel Vetter](/assets/img/avatar_default.png)
It belongs right next to the addmap and rmmap functions really. And for OCD consistency name it drm_legacy_getmap_ioctl. Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1461691808-12414-4-git-send-email-daniel.vetter@ffwll.ch
765 lines
25 KiB
C
765 lines
25 KiB
C
/*
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* Created: Fri Jan 8 09:01:26 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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* All Rights Reserved.
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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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*
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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 <drm/drmP.h>
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#include <drm/drm_core.h>
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#include "drm_legacy.h"
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#include "drm_internal.h"
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#include "drm_crtc_internal.h"
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#include <linux/pci.h>
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#include <linux/export.h>
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static int drm_version(struct drm_device *dev, void *data,
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struct drm_file *file_priv);
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/*
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* Get the bus id.
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*
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* \param inode device inode.
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* \param file_priv DRM file private.
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* \param cmd command.
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* \param arg user argument, pointing to a drm_unique structure.
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* \return zero on success or a negative number on failure.
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*
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* Copies the bus id from drm_device::unique into user space.
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*/
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static int drm_getunique(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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struct drm_unique *u = data;
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struct drm_master *master = file_priv->master;
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if (u->unique_len >= master->unique_len) {
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if (copy_to_user(u->unique, master->unique, master->unique_len))
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return -EFAULT;
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}
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u->unique_len = master->unique_len;
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return 0;
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}
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static void
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drm_unset_busid(struct drm_device *dev,
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struct drm_master *master)
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{
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kfree(master->unique);
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master->unique = NULL;
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master->unique_len = 0;
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}
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/*
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* Set the bus id.
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*
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* \param inode device inode.
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* \param file_priv DRM file private.
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* \param cmd command.
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* \param arg user argument, pointing to a drm_unique structure.
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* \return zero on success or a negative number on failure.
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*
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* Copies the bus id from userspace into drm_device::unique, and verifies that
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* it matches the device this DRM is attached to (EINVAL otherwise). Deprecated
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* in interface version 1.1 and will return EBUSY when setversion has requested
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* version 1.1 or greater. Also note that KMS is all version 1.1 and later and
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* UMS was only ever supported on pci devices.
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*/
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static int drm_setunique(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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struct drm_unique *u = data;
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struct drm_master *master = file_priv->master;
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int ret;
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if (master->unique_len || master->unique)
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return -EBUSY;
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if (!u->unique_len || u->unique_len > 1024)
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return -EINVAL;
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if (drm_core_check_feature(dev, DRIVER_MODESET))
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return 0;
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if (WARN_ON(!dev->pdev))
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return -EINVAL;
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ret = drm_pci_set_unique(dev, master, u);
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if (ret)
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goto err;
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return 0;
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err:
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drm_unset_busid(dev, master);
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return ret;
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}
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static int drm_set_busid(struct drm_device *dev, struct drm_file *file_priv)
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{
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struct drm_master *master = file_priv->master;
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int ret;
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if (master->unique != NULL)
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drm_unset_busid(dev, master);
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if (dev->driver->set_busid) {
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ret = dev->driver->set_busid(dev, master);
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if (ret) {
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drm_unset_busid(dev, master);
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return ret;
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}
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} else {
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if (WARN(dev->unique == NULL,
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"No drm_driver.set_busid() implementation provided by "
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"%ps. Use drm_dev_set_unique() to set the unique "
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"name explicitly.", dev->driver))
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return -EINVAL;
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master->unique = kstrdup(dev->unique, GFP_KERNEL);
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if (master->unique)
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master->unique_len = strlen(dev->unique);
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}
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return 0;
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}
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/*
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* Get client information.
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*
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* \param inode device inode.
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* \param file_priv DRM file private.
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* \param cmd command.
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* \param arg user argument, pointing to a drm_client structure.
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*
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* \return zero on success or a negative number on failure.
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*
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* Searches for the client with the specified index and copies its information
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* into userspace
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*/
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static int drm_getclient(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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struct drm_client *client = data;
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/*
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* Hollowed-out getclient ioctl to keep some dead old drm tests/tools
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* not breaking completely. Userspace tools stop enumerating one they
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* get -EINVAL, hence this is the return value we need to hand back for
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* no clients tracked.
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*
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* Unfortunately some clients (*cough* libva *cough*) use this in a fun
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* attempt to figure out whether they're authenticated or not. Since
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* that's the only thing they care about, give it to the directly
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* instead of walking one giant list.
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*/
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if (client->idx == 0) {
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client->auth = file_priv->authenticated;
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client->pid = pid_vnr(file_priv->pid);
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client->uid = from_kuid_munged(current_user_ns(),
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file_priv->uid);
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client->magic = 0;
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client->iocs = 0;
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return 0;
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} else {
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return -EINVAL;
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}
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}
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/*
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* Get statistics information.
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*
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* \param inode device inode.
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* \param file_priv DRM file private.
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* \param cmd command.
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* \param arg user argument, pointing to a drm_stats structure.
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*
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* \return zero on success or a negative number on failure.
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*/
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static int drm_getstats(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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struct drm_stats *stats = data;
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/* Clear stats to prevent userspace from eating its stack garbage. */
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memset(stats, 0, sizeof(*stats));
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return 0;
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}
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/*
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* Get device/driver capabilities
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*/
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static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
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{
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struct drm_get_cap *req = data;
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req->value = 0;
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switch (req->capability) {
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case DRM_CAP_DUMB_BUFFER:
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if (dev->driver->dumb_create)
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req->value = 1;
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break;
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case DRM_CAP_VBLANK_HIGH_CRTC:
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req->value = 1;
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break;
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case DRM_CAP_DUMB_PREFERRED_DEPTH:
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req->value = dev->mode_config.preferred_depth;
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break;
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case DRM_CAP_DUMB_PREFER_SHADOW:
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req->value = dev->mode_config.prefer_shadow;
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break;
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case DRM_CAP_PRIME:
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req->value |= dev->driver->prime_fd_to_handle ? DRM_PRIME_CAP_IMPORT : 0;
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req->value |= dev->driver->prime_handle_to_fd ? DRM_PRIME_CAP_EXPORT : 0;
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break;
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case DRM_CAP_TIMESTAMP_MONOTONIC:
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req->value = drm_timestamp_monotonic;
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break;
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case DRM_CAP_ASYNC_PAGE_FLIP:
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req->value = dev->mode_config.async_page_flip;
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break;
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case DRM_CAP_CURSOR_WIDTH:
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if (dev->mode_config.cursor_width)
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req->value = dev->mode_config.cursor_width;
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else
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req->value = 64;
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break;
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case DRM_CAP_CURSOR_HEIGHT:
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if (dev->mode_config.cursor_height)
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req->value = dev->mode_config.cursor_height;
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else
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req->value = 64;
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break;
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case DRM_CAP_ADDFB2_MODIFIERS:
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req->value = dev->mode_config.allow_fb_modifiers;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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/*
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* Set device/driver capabilities
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*/
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static int
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drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
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{
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struct drm_set_client_cap *req = data;
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switch (req->capability) {
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case DRM_CLIENT_CAP_STEREO_3D:
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if (req->value > 1)
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return -EINVAL;
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file_priv->stereo_allowed = req->value;
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break;
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case DRM_CLIENT_CAP_UNIVERSAL_PLANES:
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if (req->value > 1)
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return -EINVAL;
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file_priv->universal_planes = req->value;
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break;
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case DRM_CLIENT_CAP_ATOMIC:
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if (!drm_core_check_feature(dev, DRIVER_ATOMIC))
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return -EINVAL;
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if (req->value > 1)
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return -EINVAL;
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file_priv->atomic = req->value;
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file_priv->universal_planes = req->value;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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/*
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* Setversion ioctl.
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*
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* \param inode device inode.
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* \param file_priv DRM file private.
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* \param cmd command.
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* \param arg user argument, pointing to a drm_lock structure.
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* \return zero on success or negative number on failure.
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*
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* Sets the requested interface version
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*/
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static int drm_setversion(struct drm_device *dev, void *data, struct drm_file *file_priv)
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{
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struct drm_set_version *sv = data;
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int if_version, retcode = 0;
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if (sv->drm_di_major != -1) {
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if (sv->drm_di_major != DRM_IF_MAJOR ||
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sv->drm_di_minor < 0 || sv->drm_di_minor > DRM_IF_MINOR) {
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retcode = -EINVAL;
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goto done;
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}
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if_version = DRM_IF_VERSION(sv->drm_di_major,
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sv->drm_di_minor);
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dev->if_version = max(if_version, dev->if_version);
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if (sv->drm_di_minor >= 1) {
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/*
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* Version 1.1 includes tying of DRM to specific device
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* Version 1.4 has proper PCI domain support
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*/
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retcode = drm_set_busid(dev, file_priv);
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if (retcode)
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goto done;
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}
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}
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if (sv->drm_dd_major != -1) {
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if (sv->drm_dd_major != dev->driver->major ||
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sv->drm_dd_minor < 0 || sv->drm_dd_minor >
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dev->driver->minor) {
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retcode = -EINVAL;
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goto done;
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}
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}
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done:
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sv->drm_di_major = DRM_IF_MAJOR;
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sv->drm_di_minor = DRM_IF_MINOR;
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sv->drm_dd_major = dev->driver->major;
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sv->drm_dd_minor = dev->driver->minor;
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return retcode;
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}
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/**
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* drm_noop - DRM no-op ioctl implemntation
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* @dev: DRM device for the ioctl
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* @data: data pointer for the ioctl
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* @file_priv: DRM file for the ioctl call
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*
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* This no-op implementation for drm ioctls is useful for deprecated
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* functionality where we can't return a failure code because existing userspace
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* checks the result of the ioctl, but doesn't care about the action.
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*
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* Always returns successfully with 0.
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*/
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int drm_noop(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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DRM_DEBUG("\n");
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return 0;
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}
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EXPORT_SYMBOL(drm_noop);
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/**
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* drm_invalid_op - DRM invalid ioctl implemntation
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* @dev: DRM device for the ioctl
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* @data: data pointer for the ioctl
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* @file_priv: DRM file for the ioctl call
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*
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* This no-op implementation for drm ioctls is useful for deprecated
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* functionality where we really don't want to allow userspace to call the ioctl
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* any more. This is the case for old ums interfaces for drivers that
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* transitioned to kms gradually and so kept the old legacy tables around. This
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* only applies to radeon and i915 kms drivers, other drivers shouldn't need to
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* use this function.
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*
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* Always fails with a return value of -EINVAL.
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*/
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int drm_invalid_op(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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return -EINVAL;
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}
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EXPORT_SYMBOL(drm_invalid_op);
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/*
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* Copy and IOCTL return string to user space
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*/
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static int drm_copy_field(char __user *buf, size_t *buf_len, const char *value)
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{
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int len;
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/* don't overflow userbuf */
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len = strlen(value);
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if (len > *buf_len)
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len = *buf_len;
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/* let userspace know exact length of driver value (which could be
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* larger than the userspace-supplied buffer) */
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*buf_len = strlen(value);
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/* finally, try filling in the userbuf */
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if (len && buf)
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if (copy_to_user(buf, value, len))
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return -EFAULT;
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return 0;
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}
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/*
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* Get version information
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*
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* \param inode device inode.
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* \param filp file pointer.
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* \param cmd command.
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* \param arg user argument, pointing to a drm_version structure.
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* \return zero on success or negative number on failure.
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*
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* Fills in the version information in \p arg.
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*/
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static int drm_version(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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struct drm_version *version = data;
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int err;
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version->version_major = dev->driver->major;
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version->version_minor = dev->driver->minor;
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version->version_patchlevel = dev->driver->patchlevel;
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err = drm_copy_field(version->name, &version->name_len,
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dev->driver->name);
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if (!err)
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err = drm_copy_field(version->date, &version->date_len,
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dev->driver->date);
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if (!err)
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err = drm_copy_field(version->desc, &version->desc_len,
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dev->driver->desc);
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return err;
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}
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/*
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* drm_ioctl_permit - Check ioctl permissions against caller
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*
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* @flags: ioctl permission flags.
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* @file_priv: Pointer to struct drm_file identifying the caller.
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*
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* Checks whether the caller is allowed to run an ioctl with the
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* indicated permissions. If so, returns zero. Otherwise returns an
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* error code suitable for ioctl return.
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*/
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int drm_ioctl_permit(u32 flags, struct drm_file *file_priv)
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{
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/* ROOT_ONLY is only for CAP_SYS_ADMIN */
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if (unlikely((flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)))
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return -EACCES;
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/* AUTH is only for authenticated or render client */
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if (unlikely((flags & DRM_AUTH) && !drm_is_render_client(file_priv) &&
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!file_priv->authenticated))
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return -EACCES;
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/* MASTER is only for master or control clients */
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if (unlikely((flags & DRM_MASTER) && !file_priv->is_master &&
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!drm_is_control_client(file_priv)))
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return -EACCES;
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/* Control clients must be explicitly allowed */
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if (unlikely(!(flags & DRM_CONTROL_ALLOW) &&
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drm_is_control_client(file_priv)))
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return -EACCES;
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/* Render clients must be explicitly allowed */
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if (unlikely(!(flags & DRM_RENDER_ALLOW) &&
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drm_is_render_client(file_priv)))
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return -EACCES;
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return 0;
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}
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EXPORT_SYMBOL(drm_ioctl_permit);
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#define DRM_IOCTL_DEF(ioctl, _func, _flags) \
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[DRM_IOCTL_NR(ioctl)] = { \
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.cmd = ioctl, \
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.func = _func, \
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.flags = _flags, \
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.name = #ioctl \
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}
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/* Ioctl table */
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static const struct drm_ioctl_desc drm_ioctls[] = {
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DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version,
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DRM_UNLOCKED|DRM_RENDER_ALLOW|DRM_CONTROL_ALLOW),
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DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
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DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_legacy_getmap_ioctl, DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_legacy_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_legacy_rmmap_ioctl, DRM_AUTH),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_legacy_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_legacy_getsareactx, DRM_AUTH),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_legacy_addctx, DRM_AUTH|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_legacy_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_legacy_getctx, DRM_AUTH),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_legacy_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_legacy_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_legacy_resctx, DRM_AUTH),
|
|
|
|
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_legacy_lock, DRM_AUTH),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_legacy_unlock, DRM_AUTH),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_legacy_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_legacy_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_legacy_infobufs, DRM_AUTH),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_legacy_mapbufs, DRM_AUTH),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_legacy_freebufs, DRM_AUTH),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_legacy_dma_ioctl, DRM_AUTH),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
|
|
#if IS_ENABLED(CONFIG_AGP)
|
|
DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
#endif
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_legacy_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_legacy_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
|
|
|
|
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_RENDER_ALLOW),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATOMIC, drm_mode_atomic_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATEPROPBLOB, drm_mode_createblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROYPROPBLOB, drm_mode_destroyblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
};
|
|
|
|
#define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
|
|
|
|
/**
|
|
* drm_ioctl - ioctl callback implementation for DRM drivers
|
|
* @filp: file this ioctl is called on
|
|
* @cmd: ioctl cmd number
|
|
* @arg: user argument
|
|
*
|
|
* Looks up the ioctl function in the ::ioctls table, checking for root
|
|
* previleges if so required, and dispatches to the respective function.
|
|
*
|
|
* Returns:
|
|
* Zero on success, negative error code on failure.
|
|
*/
|
|
long drm_ioctl(struct file *filp,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct drm_file *file_priv = filp->private_data;
|
|
struct drm_device *dev;
|
|
const struct drm_ioctl_desc *ioctl = NULL;
|
|
drm_ioctl_t *func;
|
|
unsigned int nr = DRM_IOCTL_NR(cmd);
|
|
int retcode = -EINVAL;
|
|
char stack_kdata[128];
|
|
char *kdata = NULL;
|
|
unsigned int usize, asize, drv_size;
|
|
bool is_driver_ioctl;
|
|
|
|
dev = file_priv->minor->dev;
|
|
|
|
if (drm_device_is_unplugged(dev))
|
|
return -ENODEV;
|
|
|
|
is_driver_ioctl = nr >= DRM_COMMAND_BASE && nr < DRM_COMMAND_END;
|
|
|
|
if (is_driver_ioctl) {
|
|
/* driver ioctl */
|
|
if (nr - DRM_COMMAND_BASE >= dev->driver->num_ioctls)
|
|
goto err_i1;
|
|
ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
|
|
} else {
|
|
/* core ioctl */
|
|
if (nr >= DRM_CORE_IOCTL_COUNT)
|
|
goto err_i1;
|
|
ioctl = &drm_ioctls[nr];
|
|
}
|
|
|
|
drv_size = _IOC_SIZE(ioctl->cmd);
|
|
usize = _IOC_SIZE(cmd);
|
|
asize = max(usize, drv_size);
|
|
cmd = ioctl->cmd;
|
|
|
|
DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
|
|
task_pid_nr(current),
|
|
(long)old_encode_dev(file_priv->minor->kdev->devt),
|
|
file_priv->authenticated, ioctl->name);
|
|
|
|
/* Do not trust userspace, use our own definition */
|
|
func = ioctl->func;
|
|
|
|
if (unlikely(!func)) {
|
|
DRM_DEBUG("no function\n");
|
|
retcode = -EINVAL;
|
|
goto err_i1;
|
|
}
|
|
|
|
retcode = drm_ioctl_permit(ioctl->flags, file_priv);
|
|
if (unlikely(retcode))
|
|
goto err_i1;
|
|
|
|
if (cmd & (IOC_IN | IOC_OUT)) {
|
|
if (asize <= sizeof(stack_kdata)) {
|
|
kdata = stack_kdata;
|
|
} else {
|
|
kdata = kmalloc(asize, GFP_KERNEL);
|
|
if (!kdata) {
|
|
retcode = -ENOMEM;
|
|
goto err_i1;
|
|
}
|
|
}
|
|
if (asize > usize)
|
|
memset(kdata + usize, 0, asize - usize);
|
|
}
|
|
|
|
if (cmd & IOC_IN) {
|
|
if (copy_from_user(kdata, (void __user *)arg,
|
|
usize) != 0) {
|
|
retcode = -EFAULT;
|
|
goto err_i1;
|
|
}
|
|
} else if (cmd & IOC_OUT) {
|
|
memset(kdata, 0, usize);
|
|
}
|
|
|
|
/* Enforce sane locking for kms driver ioctls. Core ioctls are
|
|
* too messy still. */
|
|
if ((drm_core_check_feature(dev, DRIVER_MODESET) && is_driver_ioctl) ||
|
|
(ioctl->flags & DRM_UNLOCKED))
|
|
retcode = func(dev, kdata, file_priv);
|
|
else {
|
|
mutex_lock(&drm_global_mutex);
|
|
retcode = func(dev, kdata, file_priv);
|
|
mutex_unlock(&drm_global_mutex);
|
|
}
|
|
|
|
if (cmd & IOC_OUT) {
|
|
if (copy_to_user((void __user *)arg, kdata,
|
|
usize) != 0)
|
|
retcode = -EFAULT;
|
|
}
|
|
|
|
err_i1:
|
|
if (!ioctl)
|
|
DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n",
|
|
task_pid_nr(current),
|
|
(long)old_encode_dev(file_priv->minor->kdev->devt),
|
|
file_priv->authenticated, cmd, nr);
|
|
|
|
if (kdata != stack_kdata)
|
|
kfree(kdata);
|
|
if (retcode)
|
|
DRM_DEBUG("ret = %d\n", retcode);
|
|
return retcode;
|
|
}
|
|
EXPORT_SYMBOL(drm_ioctl);
|
|
|
|
/**
|
|
* drm_ioctl_flags - Check for core ioctl and return ioctl permission flags
|
|
* @nr: ioctl number
|
|
* @flags: where to return the ioctl permission flags
|
|
*
|
|
* This ioctl is only used by the vmwgfx driver to augment the access checks
|
|
* done by the drm core and insofar a pretty decent layering violation. This
|
|
* shouldn't be used by any drivers.
|
|
*
|
|
* Returns:
|
|
* True if the @nr corresponds to a DRM core ioctl numer, false otherwise.
|
|
*/
|
|
bool drm_ioctl_flags(unsigned int nr, unsigned int *flags)
|
|
{
|
|
if (nr >= DRM_COMMAND_BASE && nr < DRM_COMMAND_END)
|
|
return false;
|
|
|
|
if (nr >= DRM_CORE_IOCTL_COUNT)
|
|
return false;
|
|
|
|
*flags = drm_ioctls[nr].flags;
|
|
return true;
|
|
}
|
|
EXPORT_SYMBOL(drm_ioctl_flags);
|