44 строки
1.7 KiB
Plaintext
44 строки
1.7 KiB
Plaintext
|
************************************************************
|
||
|
|
* For the very latest on DRI development, please see: *
|
||
|
* http://dri.freedesktop.org/ *
|
||
|
|
************************************************************
|
||
|
|
|
||
|
|
The Direct Rendering Manager (drm) is a device-independent kernel-level
|
||
|
|
device driver that provides support for the XFree86 Direct Rendering
|
||
|
|
Infrastructure (DRI).
|
||
|
|
|
||
|
|
The DRM supports the Direct Rendering Infrastructure (DRI) in four major
|
||
|
|
ways:
|
||
|
|
|
||
|
|
1. The DRM provides synchronized access to the graphics hardware via
|
||
|
|
the use of an optimized two-tiered lock.
|
||
|
|
|
||
|
|
2. The DRM enforces the DRI security policy for access to the graphics
|
||
|
|
hardware by only allowing authenticated X11 clients access to
|
||
|
|
restricted regions of memory.
|
||
|
|
|
||
|
|
3. The DRM provides a generic DMA engine, complete with multiple
|
||
|
|
queues and the ability to detect the need for an OpenGL context
|
||
|
|
switch.
|
||
|
|
|
||
|
|
4. The DRM is extensible via the use of small device-specific modules
|
||
|
|
that rely extensively on the API exported by the DRM module.
|
||
|
|
|
||
|
|
|
||
|
|
Documentation on the DRI is available from:
|
||
|
|
http://dri.freedesktop.org/wiki/Documentation
|
||
|
|
http://sourceforge.net/project/showfiles.php?group_id=387
|
||
|
|
http://dri.sourceforge.net/doc/
|
||
|
|
|
||
|
|
For specific information about kernel-level support, see:
|
||
|
|
|
||
|
|
The Direct Rendering Manager, Kernel Support for the Direct Rendering
|
||
|
|
Infrastructure
|
||
|
|
http://dri.sourceforge.net/doc/drm_low_level.html
|
||
|
|
|
||
|
|
Hardware Locking for the Direct Rendering Infrastructure
|
||
|
|
http://dri.sourceforge.net/doc/hardware_locking_low_level.html
|
||
|
|
|
||
|
|
A Security Analysis of the Direct Rendering Infrastructure
|
||
|
|
http://dri.sourceforge.net/doc/security_low_level.html
|