| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | ************************************************************ |
| 2 | * For the very latest on DRI development, please see: * |
| Randy Dunlap | f54d1e4 | 2007-02-09 10:28:21 +1100 | [diff] [blame] | 3 | * http://dri.freedesktop.org/ * |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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: |
| Randy Dunlap | f54d1e4 | 2007-02-09 10:28:21 +1100 | [diff] [blame] | 29 | http://dri.freedesktop.org/wiki/Documentation |
| 30 | http://sourceforge.net/project/showfiles.php?group_id=387 |
| 31 | http://dri.sourceforge.net/doc/ |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
| 33 | For specific information about kernel-level support, see: |
| 34 | |
| 35 | The Direct Rendering Manager, Kernel Support for the Direct Rendering |
| 36 | Infrastructure |
| Randy Dunlap | f54d1e4 | 2007-02-09 10:28:21 +1100 | [diff] [blame] | 37 | http://dri.sourceforge.net/doc/drm_low_level.html |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
| 39 | Hardware Locking for the Direct Rendering Infrastructure |
| Randy Dunlap | f54d1e4 | 2007-02-09 10:28:21 +1100 | [diff] [blame] | 40 | http://dri.sourceforge.net/doc/hardware_locking_low_level.html |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
| 42 | A Security Analysis of the Direct Rendering Infrastructure |
| Randy Dunlap | f54d1e4 | 2007-02-09 10:28:21 +1100 | [diff] [blame] | 43 | http://dri.sourceforge.net/doc/security_low_level.html |