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1************************************************************
2* For the very latest on DRI development, please see: *
3* http://dri.freedesktop.org/ *
4************************************************************
5
6The Direct Rendering Manager (drm) is a device-independent kernel-level
7device driver that provides support for the XFree86 Direct Rendering
8Infrastructure (DRI).
9
10The DRM supports the Direct Rendering Infrastructure (DRI) in four major
11ways:
12
13 1. The DRM provides synchronized access to the graphics hardware via
14 the use of an optimized two-tiered lock.
15
16 2. The DRM enforces the DRI security policy for access to the graphics
17 hardware by only allowing authenticated X11 clients access to
18 restricted regions of memory.
19
20 3. The DRM provides a generic DMA engine, complete with multiple
21 queues and the ability to detect the need for an OpenGL context
22 switch.
23
24 4. The DRM is extensible via the use of small device-specific modules
25 that rely extensively on the API exported by the DRM module.
26
27
28Documentation on the DRI is available from:
29 http://dri.freedesktop.org/wiki/Documentation
30 http://sourceforge.net/project/showfiles.php?group_id=387
31 http://dri.sourceforge.net/doc/
32
33For specific information about kernel-level support, see:
34
35 The Direct Rendering Manager, Kernel Support for the Direct Rendering
36 Infrastructure
37 http://dri.sourceforge.net/doc/drm_low_level.html
38
39 Hardware Locking for the Direct Rendering Infrastructure
40 http://dri.sourceforge.net/doc/hardware_locking_low_level.html
41
42 A Security Analysis of the Direct Rendering Infrastructure
43 http://dri.sourceforge.net/doc/security_low_level.html