Root/drivers/gpu/drm/README.drm

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
44

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