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42 lines
1.4 KiB
Text
42 lines
1.4 KiB
Text
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The Direct Rendering Manager (drm) is a device-independent kernel-level
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device driver that provides support for the XFree86 Direct Rendering
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Infrastructure (DRI).
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The DRM supports the Direct Rendering Infrastructure (DRI) in four major
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ways:
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1. The DRM provides synchronized access to the graphics hardware via
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the use of an optimized two-tiered lock.
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2. The DRM enforces the DRI security policy for access to the graphics
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hardware by only allowing authenticated X11 clients access to
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restricted regions of memory.
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3. The DRM provides a generic DMA engine, complete with multiple
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queues and the ability to detect the need for an OpenGL context
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switch.
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4. The DRM is extensible via the use of small device-specific modules
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that rely extensively on the API exported by the DRM module.
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Documentation on the DRI is available from:
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http://precisioninsight.com/piinsights.html
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For specific information about kernel-level support, see:
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The Direct Rendering Manager, Kernel Support for the Direct Rendering
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Infrastructure
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http://precisioninsight.com/dr/drm.html
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Hardware Locking for the Direct Rendering Infrastructure
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http://precisioninsight.com/dr/locking.html
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A Security Analysis of the Direct Rendering Infrastructure
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http://precisioninsight.com/dr/security.html
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$XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/README.drm,v 1.2 1999/09/27 14:59:24 dawes Exp $
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