682 lines
12 KiB
Text
682 lines
12 KiB
Text
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" [
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<!ENTITY base CDATA "..">
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<!ENTITY date "$FreeBSD: www/en/projects/busdma/index.sgml,v 1.10 2002/12/09 22:48:21 rwatson Exp $">
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<!ENTITY title "FreeBSD busdma driver conversion project">
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<!ENTITY email 'mux'>
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<!ENTITY % includes SYSTEM "../../includes.sgml"> %includes;
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<!-- Status levels -->
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<!ENTITY status.done "<font color=green>Done</font>">
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<!ENTITY status.wip "<font color=blue>In progress</font>">
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<!ENTITY status.new "<font color=red>Not done</font>">
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<!ENTITY status.resolved "<font color=green>Resolved</font>">
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<!ENTITY status.unresolved "<font color=red>Unresolved</font>">
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<!-- The list of contributors was moved to a seperate file so that it can
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be used by other documents in the FreeBSD web site. -->
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<!ENTITY % developers SYSTEM "../../developers.sgml"> %developers;
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]>
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<html>
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&header;
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<h2>Contents</h2>
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<ul>
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<li><a href="#goal">Project Goal</a></li>
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<li><a href="#platform-status">Platform Support Status</a></li>
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<li><a href="#ifnet-status">Network Interface Driver Status</a></li>
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<li><a href="#storage-status">Storage Device Driver Status</a></li>
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<li><a href="#misc-status">Miscellaneous Device Driver Status</a></li>
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</ul>
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<a name="goal"></a>
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<h2>Project Goal</h2>
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<p>The busdma interfaces permit hardware device drivers to operate
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on a variety of platforms avoiding the encoding of platform-specific
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access methods into drivers. This lowers the maintenance costs
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for drivers across platforms, and improves the chances that a driver
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will "just work" on a new platform. Modifying a driver to make use
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of busdma is relatively straight forward, but does require
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familiarity with both the device driver and busdma primitives.
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For busdma to be used in FreeBSD, two sets of changes are generally
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required: adaptation of the busdma implementation to run on all
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platforms, and adaptation of drivers to use the framework. As such,
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status information on this project is broken down into platform
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support, and driver support (sorted by category). Completing
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this work requires a thorough audit of the system device drivers,
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then prioritized conversion of drivers.</p>
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<p>The task list below is not intended to be complete, but does
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represent a set of relevant and/or important components of the
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overall work. The "Responsible" field identifies a developer who
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has expressed willingness to be responsible for completing the
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identified task; this doesn't preclude others working on it,
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but suggests that coordination with the responsible party might
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be appropriate so as to avoid unnecessary duplication of work,
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and to maximize forward progress. If beginning work on a new
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area of substantial size, or one that appears unclaimed, it may
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be worth dropping an e-mail to &a.mux; to see if any progress
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has been made.</p>
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<p>The definition of the date field varies depending on the status
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of a task. For completed tasks, it refers to the date completed
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or reported completed. For in-progress tasks, it refers to the
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date of the last update of the entry. For stalled tasks, it
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refers to the date that the task was declared stalled. For
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new tasks, it refers to the date the task was added to the list.</p>
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<p>Tasks are sorted first by status, then by date.</p>
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<a name="platform-status"></a>
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<h2>Platform Support Status</h2>
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<table border=3>
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<tr>
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<th> Task </th>
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<th> Responsible </th>
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<th> Last updated </th>
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<th> Status </th>
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<th> Details </th>
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</tr>
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<tr>
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<td>alpha</td>
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<td></td>
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<td></td>
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<td>&status.wip;</td>
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<td></td>
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</tr>
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<tr>
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<td>ia64</td>
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<td></td>
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<td></td>
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<td>&status.new;</td>
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<td></td>
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</tr>
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<tr>
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<td>i386</td>
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<td>&a.sam;</td>
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<td>December 9, 2002</td>
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<td>&status.done;</td>
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<td>Fully supported.</td>
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</tr>
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<tr>
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<td>powerpc</td>
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<td></td>
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<td></td>
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<td>&status.new;</td>
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<td></td>
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</tr>
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<tr>
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<td>sparc64</td>
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<td>&a.mux;</td>
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<td>December 9, 2002</td>
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<td>&status.wip;</td>
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<td>Mbuf busdma interfaces not yet implemented.</td>
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</tr>
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</table>
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<a name="ifnet-status"></a>
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<h2>Network Interface Driver Status</h2>
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<table border=3>
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<tr>
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<th> Task </th>
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<th> Responsible </th>
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<th> Last updated </th>
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<th> Status </th>
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<th> Notes </th>
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</tr>
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<tr>
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<td> if_ar </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> kvtop() </td>
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</tr>
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<tr>
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<td> if_bge </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> vtophys() </td>
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</tr>
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<tr>
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<td> if_cs </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> </td>
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</tr>
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<tr>
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<td> if_dc </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> </td>
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</tr>
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<tr>
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<td> if_ed </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> kvtop() </td>
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</tr>
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<tr>
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<td> if_em </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> vtophys() </td>
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</tr>
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<tr>
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<td> if_en </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> vtophys() </td>
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</tr>
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<tr>
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<td> if_fxp </td>
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<td> &a.mux; </td>
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<td> December 9, 2002 </td>
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<td> &status.wip; </td>
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<td> vtophys() </td>
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</tr>
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<tr>
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<td> if_fwe </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> </td>
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</tr>
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<tr>
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<td> if_gem </td>
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<td> &a.tmm; </td>
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<td> December 9, 2002 </td>
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<td> &status.wip; </td>
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<td> Uses old busdma interface. </td>
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</tr>
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<tr>
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<td> if_gx </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> vtophys() </td>
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</tr>
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<tr>
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<td> if_hme </td>
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<td> &a.tmm; </td>
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<td> December 9, 2002 </td>
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<td> &status.wip; </td>
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<td> Uses old busdma interface. </td>
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</tr>
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<tr>
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<td> if_idt </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> vtophys() </td>
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</tr>
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<tr>
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<td> if_ie </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> kvtop() </td>
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</tr>
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<tr>
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<td> if_lge </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> vtophys() </td>
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</tr>
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<tr>
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<td> if_lmc </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> vtophys() </td>
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</tr>
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<tr>
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<td> if_lnc </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> vtophys() </td>
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</tr>
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<tr>
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<td> if_my </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> vtophys() </td>
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</tr>
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<tr>
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<td> if_nge </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> vtophys() </td>
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</tr>
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<tr>
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<td> if_pdq </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> mostly busdma, except for vtophys() </td>
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</tr>
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<tr>
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<td> if_rl </td>
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<td> &a.wpaul; </td>
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<td> December 9, 2002 </td>
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<td> &status.done; </td>
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<td> </td>
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</tr>
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<tr>
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<td> if_sis </td>
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<td> &a.wpaul; </td>
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<td> December 9, 2002 </td>
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<td> &status.done; </td>
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<td> </td>
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</tr>
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<tr>
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<td> if_sr </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> vtophys() </td>
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</tr>
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<tr>
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<td> if_ti </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> </td>
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</tr>
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<tr>
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<td> if_tx </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> </td>
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</tr>
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<tr>
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<td> if_txp </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> </td>
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</tr>
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<tr>
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<td> if_xl </td>
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<td> &a.mux; </td>
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<td> December 9, 2002 </td>
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<td> &status.wip; </td>
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<td> </td>
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</tr>
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</table>
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<a name="storage-status"></a>
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<h2>Storage Device Driver Status</h2>
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<table border=3>
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<tr>
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<th> Task </th>
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<th> Responsible </th>
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<th> Last updated </th>
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<th> Status </th>
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<th> Notes </th>
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</tr>
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<tr>
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<td> aac </td>
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<td> </td>
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<td> December 9, 2002 </td>
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<td> &status.done; </td>
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<td> Not 64-bit-safe </td>
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</tr>
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<tr>
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<td> aha </td>
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<td> </td>
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<td> December 9, 2002 </td>
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<td> &status.done; </td>
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<td> </td>
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</tr>
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<tr>
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<td> adv </td>
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<td> </td>
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<td> December 9, 2002 </td>
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<td> &status.done; </td>
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<td> </td>
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</tr>
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<tr>
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<td> ahb </td>
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<td> </td>
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<td> December 9, 2002 </td>
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<td> &status.done; </td>
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<td> </td>
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</tr>
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<tr>
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<td> aic7xxx </td>
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<td> </td>
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<td> December 9, 2002 </td>
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<td> &status.done; </td>
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<td> </td>
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</tr>
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<tr>
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<td> amr </td>
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<td> </td>
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<td> December 9, 2002 </td>
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<td> &status.done; </td>
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<td> </td>
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</tr>
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<tr>
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<td> asr </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> vtophys() </td>
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</tr>
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<tr>
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<td> ata </td>
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<td> </td>
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<td> December 9, 2002 </td>
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<td> &status.done; </td>
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<td> </td>
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</tr>
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<tr>
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<td> buslogic </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> vtophys() </td>
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</tr>
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<tr>
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<td> ciss </td>
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<td> </td>
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<td> December 9, 2002 </td>
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<td> &status.done; </td>
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<td> </td>
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</tr>
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<tr>
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<td> dpt </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> vtophys() </td>
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</tr>
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<tr>
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<td> ida </td>
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<td> </td>
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<td> December 9, 2002 </td>
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<td> &status.done; </td>
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<td> </td>
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</tr>
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<tr>
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<td> iir </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> vtophys() </td>
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</tr>
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<tr>
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<td> isp </td>
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<td> </td>
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<td> December 9, 2002 </td>
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<td> &status.done; </td>
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<td> </td>
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</tr>
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<tr>
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<td> mlx </td>
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<td> </td>
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<td> December 9, 2002 </td>
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<td> &status.done; </td>
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<td> </td>
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</tr>
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<tr>
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<td> mly </td>
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<td> </td>
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<td> December 9, 2002 </td>
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<td> &status.done; </td>
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<td> </td>
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</tr>
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<tr>
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<td> mpt </td>
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<td> </td>
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<td> December 9, 2002 </td>
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<td> &status.done; </td>
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<td> </td>
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</tr>
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<tr>
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<td> pst </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> vtophys() </td>
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</tr>
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<tr>
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<td> stg </td>
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<td> </td>
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<td> December 9, 2002 </td>
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<td> &status.done; </td>
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<td> At least, it looks like it may well be. </td>
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</tr>
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<tr>
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<td> sym </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> vtophys() </td>
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</tr>
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<tr>
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<td> trm </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> vtophys() </td>
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</tr>
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<tr>
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<td> twe </td>
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<td> </td>
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<td> December 9, 2002 </td>
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<td> &status.done; </td>
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<td> </td>
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</tr>
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</table>
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<a name="misc-status"></a>
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|
<h2>Miscellaneous Device Driver Status</h2>
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|
|
|
<table border=3>
|
|
<tr>
|
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<th> Task </th>
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<th> Responsible </th>
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<th> Last updated </th>
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<th> Status </th>
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<th> Notes </th>
|
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</tr>
|
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|
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<tr>
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<td> bktr </td>
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<td> </td>
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<td> </td>
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<td> &status.new; </td>
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<td> vtophys() </td>
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</tr>
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<tr>
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<td> ct </td>
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<td> </td>
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<td> </td>
|
|
<td> &status.new; </td>
|
|
<td> </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> cs </td>
|
|
<td> </td>
|
|
<td> </td>
|
|
<td> &status.new; </td>
|
|
<td> </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> digi </td>
|
|
<td> </td>
|
|
<td> </td>
|
|
<td> &status.new; </td>
|
|
<td> vtophys() </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> drm </td>
|
|
<td> </td>
|
|
<td> </td>
|
|
<td> &status.new; </td>
|
|
<td> vtophys() </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> exca </td>
|
|
<td> &a.imp; </td>
|
|
<td> December 9, 2002 </td>
|
|
<td> &status.done; </td>
|
|
<td> </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> fb </td>
|
|
<td> </td>
|
|
<td> </td>
|
|
<td> &status.new; </td>
|
|
<td> vtophys() </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> firewire </td>
|
|
<td> </td>
|
|
<td> </td>
|
|
<td> &status.new; </td>
|
|
<td> vtophys() </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> hea </td>
|
|
<td> </td>
|
|
<td> </td>
|
|
<td> &status.new; </td>
|
|
<td> vtophys() </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> hfa </td>
|
|
<td> </td>
|
|
<td> </td>
|
|
<td> &status.new; </td>
|
|
<td> vtophys() </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> hifn </td>
|
|
<td> </td>
|
|
<td> </td>
|
|
<td> &status.done; </td>
|
|
<td> </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> musycc </td>
|
|
<td> </td>
|
|
<td> </td>
|
|
<td> &status.new; </td>
|
|
<td> vtophys() </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> ubsec </td>
|
|
<td> &a.sam; </td>
|
|
<td> December 9, 2002</td>
|
|
<td> &status.done; </td>
|
|
<td> vtophys() is used in debugging printf </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> usb </td>
|
|
<td> </td>
|
|
<td> </td>
|
|
<td> &status.new; </td>
|
|
<td> vtophys() </td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td> wds </td>
|
|
<td> </td>
|
|
<td> December 9, 2002 </td>
|
|
<td> &status.done; </td>
|
|
<td> vtophys() </td>
|
|
</tr>
|
|
|
|
</table>
|
|
|
|
&footer;
|
|
</body>
|
|
</html>
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