2 The Direct Rendering Manager (drm) is a device-independent kernel-level
3 device driver that provides support for the XFree86 Direct Rendering
6 The DRM supports the Direct Rendering Infrastructure (DRI) in four major
9 1. The DRM provides synchronized access to the graphics hardware via
10 the use of an optimized two-tiered lock.
12 2. The DRM enforces the DRI security policy for access to the graphics
13 hardware by only allowing authenticated X11 clients access to
14 restricted regions of memory.
16 3. The DRM provides a generic DMA engine, complete with multiple
17 queues and the ability to detect the need for an OpenGL context
20 4. The DRM is extensible via the use of small device-specific modules
21 that rely extensively on the API exported by the DRM module.
24 Documentation on the DRI is available from:
25 http://precisioninsight.com/piinsights.html
27 For specific information about kernel-level support, see:
29 The Direct Rendering Manager, Kernel Support for the Direct Rendering
31 http://precisioninsight.com/dr/drm.html
33 Hardware Locking for the Direct Rendering Infrastructure
34 http://precisioninsight.com/dr/locking.html
36 A Security Analysis of the Direct Rendering Infrastructure
37 http://precisioninsight.com/dr/security.html