git://bbs.cooldavid.org / net-next-2.6.git / blame
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|---|---|---|
| 1da177e4 LT |
1 | ************************************************************ |
| 2 | * For the very latest on DRI development, please see: * | |
| f54d1e40 | 3 | * http://dri.freedesktop.org/ * |
| 1da177e4 LT |
4 | ************************************************************ |
| 5 | ||
| 6 | The Direct Rendering Manager (drm) is a device-independent kernel-level | |
| 7 | device driver that provides support for the XFree86 Direct Rendering | |
| 8 | Infrastructure (DRI). | |
| 9 | ||
| 10 | The DRM supports the Direct Rendering Infrastructure (DRI) in four major | |
| 11 | ways: | |
| 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 | ||
| 28 | Documentation on the DRI is available from: | |
| f54d1e40 RD |
29 | http://dri.freedesktop.org/wiki/Documentation |
| 30 | http://sourceforge.net/project/showfiles.php?group_id=387 | |
| 31 | http://dri.sourceforge.net/doc/ | |
| 1da177e4 LT |
32 | |
| 33 | For specific information about kernel-level support, see: | |
| 34 | ||
| 35 | The Direct Rendering Manager, Kernel Support for the Direct Rendering | |
| 36 | Infrastructure | |
| f54d1e40 | 37 | http://dri.sourceforge.net/doc/drm_low_level.html |
| 1da177e4 LT |
38 | |
| 39 | Hardware Locking for the Direct Rendering Infrastructure | |
| f54d1e40 | 40 | http://dri.sourceforge.net/doc/hardware_locking_low_level.html |
| 1da177e4 LT |
41 | |
| 42 | A Security Analysis of the Direct Rendering Infrastructure | |
| f54d1e40 | 43 | http://dri.sourceforge.net/doc/security_low_level.html |