186 lines
6.2 KiB
C
186 lines
6.2 KiB
C
/*
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* Internal Header for the Direct Rendering Manager
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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 (c) 2009-2010, Code Aurora Forum.
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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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#ifndef _DRM_IOCTL_H_
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#define _DRM_IOCTL_H_
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#include <linux/types.h>
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#include <linux/bitops.h>
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#include <asm/ioctl.h>
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struct drm_device;
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struct drm_file;
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struct file;
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/**
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* drm_ioctl_t - DRM ioctl function type.
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* @dev: DRM device inode
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* @data: private pointer of the ioctl call
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* @file_priv: DRM file this ioctl was made on
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*
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* This is the DRM ioctl typedef. Note that drm_ioctl() has alrady copied @data
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* into kernel-space, and will also copy it back, depending upon the read/write
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* settings in the ioctl command code.
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*/
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typedef int drm_ioctl_t(struct drm_device *dev, void *data,
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struct drm_file *file_priv);
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/**
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* drm_ioctl_compat_t - compatibility DRM ioctl function type.
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* @filp: file pointer
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* @cmd: ioctl command code
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* @arg: DRM file this ioctl was made on
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*
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* Just a typedef to make declaring an array of compatibility handlers easier.
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* New drivers shouldn't screw up the structure layout for their ioctl
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* structures and hence never need this.
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*/
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typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
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unsigned long arg);
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#define DRM_IOCTL_NR(n) _IOC_NR(n)
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#define DRM_MAJOR 226
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/**
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* enum drm_ioctl_flags - DRM ioctl flags
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*
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* Various flags that can be set in &drm_ioctl_desc.flags to control how
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* userspace can use a given ioctl.
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*/
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enum drm_ioctl_flags {
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/**
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* @DRM_AUTH:
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*
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* This is for ioctl which are used for rendering, and require that the
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* file descriptor is either for a render node, or if it's a
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* legacy/primary node, then it must be authenticated.
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*/
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DRM_AUTH = BIT(0),
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/**
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* @DRM_MASTER:
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*
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* This must be set for any ioctl which can change the modeset or
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* display state. Userspace must call the ioctl through a primary node,
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* while it is the active master.
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*
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* Note that read-only modeset ioctl can also be called by
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* unauthenticated clients, or when a master is not the currently active
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* one.
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*/
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DRM_MASTER = BIT(1),
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/**
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* @DRM_ROOT_ONLY:
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*
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* Anything that could potentially wreak a master file descriptor needs
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* to have this flag set. Current that's only for the SETMASTER and
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* DROPMASTER ioctl, which e.g. logind can call to force a non-behaving
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* master (display compositor) into compliance.
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*
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* This is equivalent to callers with the SYSADMIN capability.
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*/
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DRM_ROOT_ONLY = BIT(2),
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/**
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* @DRM_UNLOCKED:
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*
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* Whether &drm_ioctl_desc.func should be called with the DRM BKL held
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* or not. Enforced as the default for all modern drivers, hence there
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* should never be a need to set this flag.
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*
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* Do not use anywhere else than for the VBLANK_WAIT IOCTL, which is the
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* only legacy IOCTL which needs this.
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*/
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DRM_UNLOCKED = BIT(4),
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/**
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* @DRM_RENDER_ALLOW:
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*
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* This is used for all ioctl needed for rendering only, for drivers
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* which support render nodes. This should be all new render drivers,
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* and hence it should be always set for any ioctl with DRM_AUTH set.
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* Note though that read-only query ioctl might have this set, but have
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* not set DRM_AUTH because they do not require authentication.
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*/
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DRM_RENDER_ALLOW = BIT(5),
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};
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/**
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* struct drm_ioctl_desc - DRM driver ioctl entry
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* @cmd: ioctl command number, without flags
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* @flags: a bitmask of &enum drm_ioctl_flags
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* @func: handler for this ioctl
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* @name: user-readable name for debug output
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*
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* For convenience it's easier to create these using the DRM_IOCTL_DEF_DRV()
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* macro.
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*/
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struct drm_ioctl_desc {
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unsigned int cmd;
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enum drm_ioctl_flags flags;
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drm_ioctl_t *func;
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const char *name;
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};
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/**
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* DRM_IOCTL_DEF_DRV() - helper macro to fill out a &struct drm_ioctl_desc
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* @ioctl: ioctl command suffix
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* @_func: handler for the ioctl
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* @_flags: a bitmask of &enum drm_ioctl_flags
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*
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* Small helper macro to create a &struct drm_ioctl_desc entry. The ioctl
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* command number is constructed by prepending ``DRM_IOCTL\_`` and passing that
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* to DRM_IOCTL_NR().
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*/
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#define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags) \
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[DRM_IOCTL_NR(DRM_IOCTL_##ioctl) - DRM_COMMAND_BASE] = { \
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.cmd = DRM_IOCTL_##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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int drm_ioctl_permit(u32 flags, struct drm_file *file_priv);
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long drm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
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long drm_ioctl_kernel(struct file *, drm_ioctl_t, void *, u32);
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#ifdef CONFIG_COMPAT
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long drm_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
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#else
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/* Let drm_compat_ioctl be assigned to .compat_ioctl unconditionally */
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#define drm_compat_ioctl NULL
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#endif
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bool drm_ioctl_flags(unsigned int nr, unsigned int *flags);
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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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int drm_invalid_op(struct drm_device *dev, void *data,
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struct drm_file *file_priv);
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#endif /* _DRM_IOCTL_H_ */
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