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Done">
In progress">
Not done">
Resolved">
Unresolved">
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&header;
Contents
Project Goal
The busdma interfaces permit hardware device drivers to operate
on a variety of platforms avoiding the encoding of platform-specific
access methods into drivers. This lowers the maintenance costs
for drivers across platforms, and improves the chances that a driver
will "just work" on a new platform. Modifying a driver to make use
of busdma is relatively straight forward, but does require
familiarity with both the device driver and busdma primitives.
For busdma to be used in FreeBSD, two sets of changes are generally
required: adaptation of the busdma implementation to run on all
platforms, and adaptation of drivers to use the framework. As such,
status information on this project is broken down into platform
support, and driver support (sorted by category). Completing
this work requires a thorough audit of the system device drivers,
then prioritized conversion of drivers.
The task list below is not intended to be complete, but does
represent a set of relevant and/or important components of the
overall work. The "Responsible" field identifies a developer who
has expressed willingness to be responsible for completing the
identified task; this doesn't preclude others working on it,
but suggests that coordination with the responsible party might
be appropriate so as to avoid unnecessary duplication of work,
and to maximize forward progress. If beginning work on a new
area of substantial size, or one that appears unclaimed, it may
be worth dropping an e-mail to &a.mux; to see if any progress
has been made.
The definition of the date field varies depending on the status
of a task. For completed tasks, it refers to the date completed
or reported completed. For in-progress tasks, it refers to the
date of the last update of the entry. For stalled tasks, it
refers to the date that the task was declared stalled. For
new tasks, it refers to the date the task was added to the list.
Tasks are sorted first by status, then by date.
Platform Support Status
| Task |
Responsible |
Last updated |
Status |
Details |
| alpha |
&a.gallatin; |
December 10, 2002 |
&status.wip; |
Support for mbuf and uio load routines present, but
untested. Pending availability of mainstream network
interface drivers to perform testing. In addition,
there may be problems with large amounts of memory. |
| ia64 |
&a.marcel; |
December 10, 2002 |
&status.wip; |
All the primitives are in place, but network interface
drivers are required for testing the mbuf and uio load
routines. In addition, there may be problems for systems
with large amounts of memory. |
| i386 |
&a.sam; |
December 9, 2002 |
&status.done; |
Fully supported. |
| powerpc |
Hiten Pandya <hiten@unixdaemons.com> |
January 15, 2003 |
&status.done; |
Fully supported. |
| sparc64 |
&a.tmm; |
January 6, 2003 |
&status.done; |
Fully supported. |
Network Interface Driver Status
| Task |
Responsible |
Last updated |
Status |
Notes |
| if_ar |
|
|
&status.new; |
kvtop() |
| if_bge |
|
|
&status.new; |
vtophys() |
| if_cs |
|
|
&status.new; |
|
| if_dc |
|
|
&status.new; |
vtophys() |
| if_de |
|
|
&status.new; |
vtophys() |
| if_ed |
|
|
&status.new; |
kvtop() |
| if_em |
&a.pdeuskar; |
December 19, 2002 |
&status.wip; |
vtophys() |
| if_en |
|
|
&status.new; |
vtophys() |
| if_fxp |
&a.mux; |
December 9, 2002 |
&status.wip; |
vtophys() |
| if_fwe |
|
|
&status.new; |
|
| if_gem |
&a.tmm; |
January 6, 2003 |
&status.done; |
|
| if_gx |
|
|
&status.new; |
vtophys() |
| if_hme |
&a.tmm; |
January 6, 2003 |
&status.done; |
|
| if_idt |
|
|
&status.new; |
vtophys() |
| if_lge |
|
|
&status.new; |
vtophys() |
| if_lmc |
|
|
&status.new; |
vtophys() |
| if_lnc |
|
|
&status.new; |
vtophys() |
| if_mn |
|
|
&status.new; |
vtophys() |
| if_my |
|
|
&status.new; |
vtophys() |
| if_nge |
|
|
&status.new; |
vtophys() |
| if_pcn |
|
|
&status.new; |
vtophys() |
| if_pdq |
|
|
&status.new; |
mostly busdma, except for vtophys() |
| if_rl |
&a.wpaul; |
December 9, 2002 |
&status.done; |
|
| if_sf |
|
|
&status.new; |
vtophys() |
| if_sis |
&a.wpaul; |
December 9, 2002 |
&status.done; |
|
| if_sk |
|
|
&status.new; |
vtophys() |
| if_sr |
|
|
&status.new; |
vtophys() |
| if_ste |
|
|
&status.new; |
vtophys() |
| if_ti |
|
|
&status.new; |
|
| if_tl |
|
|
&status.new; |
|
| if_tx |
|
|
&status.new; |
|
| if_txp |
|
|
&status.new; |
|
| if_vr |
Christian S.J. Peron <maneo@bsdpro.com> |
January 20, 2003 |
&status.wip; |
|
| if_wb |
|
|
&status.new; |
|
| if_xl |
&a.mux; |
December 17, 2002 |
&status.done; |
|
Storage Device Driver Status
| Task |
Responsible |
Last updated |
Status |
Notes |
| aac |
|
December 9, 2002 |
&status.done; |
Not 64-bit-safe |
| adv |
|
December 9, 2002 |
&status.done; |
|
| aha |
|
December 9, 2002 |
&status.done; |
|
| ahb |
|
December 9, 2002 |
&status.done; |
|
| aic7xxx |
|
December 9, 2002 |
&status.done; |
|
| amd |
|
December 14, 2002 |
&status.done; |
|
| amr |
|
December 9, 2002 |
&status.done; |
|
| asr |
&a.obrien; |
January 4, 2003 |
&status.new; |
vtophys() |
| ata |
|
December 9, 2002 |
&status.done; |
|
| buslogic |
|
|
&status.new; |
vtophys() |
| ciss |
|
December 9, 2002 |
&status.done; |
|
| ct |
|
|
&status.new; |
|
| dpt |
|
|
&status.new; |
vtophys() |
| ida |
|
December 9, 2002 |
&status.done; |
|
| iir |
|
|
&status.new; |
vtophys() |
| isp |
|
December 9, 2002 |
&status.done; |
|
| mlx |
|
December 9, 2002 |
&status.done; |
|
| mly |
|
December 9, 2002 |
&status.done; |
|
| mpt |
|
December 9, 2002 |
&status.done; |
|
| ncr |
|
|
&status.new; |
vtophys() |
| pst |
|
|
&status.new; |
vtophys() |
| stg |
|
December 9, 2002 |
&status.done; |
At least, it looks like it may well be. |
| sym |
|
December 19, 2002 |
&status.done; |
|
| trm |
&a.cognet; |
December 9, 2002 |
&status.wip; |
vtophys() |
| twe |
|
December 9, 2002 |
&status.done; |
|
Miscellaneous Device Driver Status
| Task |
Responsible |
Last updated |
Status |
Notes |
| agp |
- |
- |
- &status.done; |
+ &a.cognet; |
+ January 23, 2003 |
+ &status.wip; |
vtophys() |
| bktr |
&a.cognet; |
January 15, 2003 |
&status.wip; |
vtophys() |
| cs |
|
|
&status.new; |
|
| digi |
|
|
&status.new; |
vtophys() |
| drm |
|
|
&status.new; |
vtophys() |
| exca |
&a.imp; |
December 9, 2002 |
&status.done; |
|
| fb |
|
|
&status.new; |
vtophys() |
| firewire |
|
|
&status.new; |
vtophys() |
| hea |
|
|
&status.new; |
vtophys() |
| hfa |
|
|
&status.new; |
vtophys() |
| hifn |
&a.sam; |
December 9, 2002 |
&status.done; |
|
| meteor |
|
|
&status.new; |
vtophys() |
| musycc |
|
|
&status.new; |
vtophys() |
| ubsec |
&a.sam; |
December 9, 2002 |
&status.done; |
vtophys() is used in debugging printf |
| usb |
&a.joe; |
December 10, 2002 |
&status.new; |
vtophys() |
| wds |
|
December 9, 2002 |
&status.done; |
|
Documentation Status
| Task |
Responsible |
Last updated |
Status |
Notes |
| manpages for the busdma API |
Hiten Pandya <hiten@unixdaemons.com> |
January 15, 2003 |
&status.wip; |
|
&footer;