mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-18 09:44:18 +08:00
5acc614ac4
No one looks at the major/minor versions except the unique/busid
stuff. If we protect that with the master_mutex (since it also affects
the unique of each master, oh well) we can mark these two IOCTL with
DRM_UNLOCKED.
While doing this I realized that the comment for the magic_map is
outdated, I've forgotten to update it in:
commit d2b34ee62b
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Fri Jun 17 09:33:21 2016 +0200
drm: Protect authmagic with master_mutex
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161210215255.7765-1-daniel.vetter@ffwll.ch
69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
/*
|
|
* Internal Header for the Direct Rendering Manager
|
|
*
|
|
* Copyright 2016 Intel Corporation
|
|
*
|
|
* Author: Daniel Vetter <daniel.vetter@ffwll.ch>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef _DRM_AUTH_H_
|
|
#define _DRM_AUTH_H_
|
|
|
|
/**
|
|
* struct drm_master - drm master structure
|
|
*
|
|
* @refcount: Refcount for this master object.
|
|
* @dev: Link back to the DRM device
|
|
* @lock: DRI1 lock information.
|
|
* @driver_priv: Pointer to driver-private information.
|
|
*
|
|
* Note that master structures are only relevant for the legacy/primary device
|
|
* nodes, hence there can only be one per device, not one per drm_minor.
|
|
*/
|
|
struct drm_master {
|
|
struct kref refcount;
|
|
struct drm_device *dev;
|
|
/**
|
|
* @unique: Unique identifier: e.g. busid. Protected by struct
|
|
* &drm_device master_mutex.
|
|
*/
|
|
char *unique;
|
|
/**
|
|
* @unique_len: Length of unique field. Protected by struct &drm_device
|
|
* master_mutex.
|
|
*/
|
|
int unique_len;
|
|
/**
|
|
* @magic_map: Map of used authentication tokens. Protected by struct
|
|
* &drm_device master_mutex.
|
|
*/
|
|
struct idr magic_map;
|
|
struct drm_lock_data lock;
|
|
void *driver_priv;
|
|
};
|
|
|
|
struct drm_master *drm_master_get(struct drm_master *master);
|
|
void drm_master_put(struct drm_master **master);
|
|
bool drm_is_current_master(struct drm_file *fpriv);
|
|
|
|
#endif
|