Define compat modules (but without dependencies yet).

branches: 1.3.150;
add compat_ossaudio

config.new => config

* Move the Linux audio emulation into its own directory and rename it
OSS (aka VoxWare) audio emulation.
* Use the OSS audio emulation for Linux and FreeBSD.
* Add mixer emulation to the OSS emulator.

compat_ossaudio: Zero-initialize idat before copyout.

Unclear if there are any paths to the copyout without initialization,
but let's play it safe to keep the auditing effort low.

XXX pullup-8
XXX pullup-9
XXX pullup-10

branches: 1.84.4;
sys/compat: Memset zero before copyout.

Just in case of uninitialized padding which would lead to kernel
stack disclosure. If the compiler can prove the memset redundant
then it can optimize it away; otherwise better safe than sorry.

ossaudio: Avoid giving userland uninitialized memory. Noticed by maxv.

The uninitalized field in this structure is `fillers`, an array that
simply reserves space for later changes in OSSv4, which this version
of the OSS compat layer (specifically for Linux applications) makes no
effort to implement.

ossaudio: Implement SNDCTL_DSP_(SET|GET)TRIGGER.

ossaudio: If the user's channel count is rejected, use the hardware count

ossaudio: Make SNDCTL_DSP_SETFMT conform with OSSv4.

The OSSv4 spec says we shouldn't really error if an invalid format is
chosen by an application. Things are especially likely to be confused
if we return MULAW, since in OSSv4 terms that means that's the native
hardware format. Instead, set and return the current hardware format
if an invalid format is chosen.

For the 24-bit sample formats, note that the NetBSD kernel currently
can't handle them in its default configuration, and will return an error
code if you attempt to use them. So, if an applicaton requests 24-bit PCM,
promote it to 32-bit PCM. According to the spec, this is valid and
applications should be checking the return value anyway.

In the Linux compat layer, we just use S16LE as a fallback. The OSSv3
headers that are still being shipped with Linux don't contain definitions
for fancier formats and we can reasonably expect all applications to
support S16LE.

ossaudio: Make SNDCTL_DSP_SPEED more robust when using invalid rates.

From the perspective of reading the OSSv4 specification, NetBSD's
behaviour when an invalid sample rate is set makes no sense at all:
AUDIO_SETINFO simply returns an error code, and then we immediately
fall through to getting the sample rate, which is still set to the
legacy default of 8000 Hz.

Instead, what OSS applications generally expect is that they will be
able to receive the actual hardware sample rate. This is very, very
unlikely to be 8000 Hz on a modern machine.

No functional change when setting a sample rate between the supported
rates of 1000 and 192000 Hz. When a rate outside this range is requested,
the hardware rate is returned (on modern hardware, generally always 48000
Hz or a multiple of 48000 Hz).

branches: 1.78.6;
Use record field for recording even on
SNDCTL_DSP_STEREO, SNDCTL_DSP_SETFMT, and SNDCTL_DSP_CHANNELS.

Use record.sample_rate for recording on SNDCTL_DSP_SPEED.
It's kernel side of PR lib/54667.

- "source" is u_long in the kernel (and int in userland). Cast -1 to u_long.
- make "s" unsigned since blocksize is too.

Fix error handling, returns an errno, not -1.

branches: 1.74.4;
- add or adjust /* FALLTHROUGH */ where appropriate
- add __unreachable() after functions that can return but won't in
this case, and thus can't be marked __dead easily

Correct debug messages.

Fix minor bugs of SNDCTL_DSP_GETISPACE.
- hiwat is playback-only parameter.
- 'bytes' should not be rounded down.

Revert a wrong OSS_SNDCTL_DSP_GETOSPACE part of rev1.70.
- 'fragments' is the number of full free blocks and should not be
negative value.
- 'bytes' should not be rounded down.

branches: 1.70.6; 1.70.14;
Update compat/ossaudio with GETISPACE/GETOSPACE corrections from
libossaudio.

branches: 1.69.2; 1.69.4; 1.69.6;
Try not to use f_data, use f_{vnode,socket,pipe,mqueue,kqueue,ksem} to get
a correctly typed pointer.

branches: 1.68.4; 1.68.10;
exec modules need to be of the exec kind

branches: 1.67.2; 1.67.12; 1.67.16;
Change the vnode locking protocol of VOP_GETATTR() to request at least
a shared lock. Make all calls outside of file systems respect it.

The calls from file systems need review.

No objections from tech-kern.

Add support for AFMT_AC3

add a lot more debugging and error checking. Alas, skype seems to be happy
getting back our values, but still does not work.

compat_ossaudio module, so others can depend on it.

branches: 1.63.2; 1.63.6; 1.63.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.62.2; 1.62.4;
Catch up with descriptor handling changes. See kern_descrip.c revision
1.173 for details.

branches: 1.61.6;
Convert all the system call entry points from:
int foo(struct lwp *l, void *v, register_t *retval)
to:
int foo(struct lwp *l, const struct foo_args *uap, register_t *retval)
Fixup compat code to not write into 'uap' and (in some cases) to actually
pass a correctly formatted 'uap' structure with the right name to the
next routine.
A few 'compat' routines that just call standard ones have been deleted.
All the 'compat' code compiles (along with the kernels required to test
build it).
98% done by automated scripts.

branches: 1.60.4;
ANSIfy most of the function definitions in sys/compat (but not ndis).
All by the magic of sed ...

Remove all the __P

branches: 1.58.2;
Remove the "struct lwp *" argument from all VFS and VOP interfaces.
The general trend is to remove it from all kernel interfaces and
this is a start. In case the calling lwp is desired, curlwp should
be used.

quick consensus on tech-kern

branches: 1.57.6;
Implement OSS_SNDCTL_DSP_GETODELAY and provide a no-op function
for OSS_SNDCTL_DSP_PROFILE.

branches: 1.56.6; 1.56.8;
Add a new ioctl AUDIO_GETBUFINFO. It works like AUDIO_GETINFO, but
doesn't obtain the ports, gain and balance related parameters.
Those generally require reading from the hardware and therefore are much
more expensive to obtain. Modify OSS emulation to use the new ioctl
where possible.

This reduces CPU usage of mplayer during mp3 playback with my Thinkpad
from 20% to < 1% and from 50% to 20% during Xvid playback.

Review and comments from jmcneill@

branches: 1.55.2; 1.55.4;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.54.2;
Merge newlock2 to head.

branches: 1.53.2; 1.53.6; 1.53.8;
remove unneeded initializer.

Use the LWP cached credentials where sane.

integrate kauth.

branches: 1.50.2; 1.50.4; 1.50.6;
Instead of getting properties from calling ioctl with AUDIO_GETINFO, use
AUDIO_INITINFO(). Now the sound with the linux flash plugin works
properly.

From OpenBSD.

branches: 1.49.4; 1.49.6;
merge ktrace-lwp.

Fix problem in ioctl() handling in OSS audio emulation which caused
unintentional changes of the audio settings e.g. when running "kphone".

Patch submitted by George Michaelson on "tech-kern@NetBSD.org".

branches: 1.47.2; 1.47.4;
nuke trailing whitespace

branches: 1.46.4; 1.46.6;
getdevinfo():
If a mixer item does not match with AudioNsomething, check whether
it ends with '.' + AudioNsomething. PR#15441

branches: 1.45.2;
Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.

Pass lwp pointers throughtout the kernel, as required, so that the lwpid can
be inserted into ktrace records. The general change has been to replace
"struct proc *" with "struct lwp *" in various function prototypes, pass
the lwp through and use l_proc to get the process pointer when needed.

Bump the kernel rev up to 1.6V

Fix missing call to FILE_UNUSE. From kern/21946, from Todd Vierling.

Change 'data' argument to fo_ioctl and fo_fcntl from 'caddr_t' to 'void *'.
Avoids a lot of casting and removes the need for some line breaks.
Removed a load of (caddr_t) casts from calls to copyin/copyout as well.
(approved by christos - he has a plan to remove caddr_t...)

Merge the nathanw_sa branch.

add support for SNDCTL_DSP_SETDUPLEX ioctl to ossaudio emulation code
code provided by Andreas Wrede in PR kern/19793

branches: 1.39.10;
Make SNDCTL_DSP_POST a nop. It's explicitly *not* supposed to sleep, and as
it's merely advisory (and in fact is implemented as a nop in the OSS->ALSA
shim), it should be safe to ignore it.

add RCSIDs (including regeneration of files as appropriate)

branches: 1.37.2;
Map OSS mixer device "line1" to native mixer device "aux".

Fix a partial construction problem that can cause race conditions
between creation of a file descriptor and close(2) when using kernel
assisted threads. What we do is stick descriptors in the table, but
mark them as "larval". This causes essentially everything to treat
it as a non-existent descriptor, except for fdalloc(), which sees a
filled slot so that it won't (incorrectly) allocate it again. When
a descriptor is fully constructed, the code that has constructed it
marks it as "mature" (which actually clears the "larval" flag), and
things continue to work as normal.

While here, gather all the code that gets a descriptor from the table
into a fd_getfile() function, and call it, rather than having the
same (sometimes incorrect) code copied all over the place.

Improved fix of PR12796, from Frederick Bruckman <fb@enteract.com>

Apply patch in PR lib/12796 from Frederick Bruckman <fb@enteract.com>

branches: 1.33.2;
constify

Use accurate rounding in conversion between OSS and NetBSD volume values.
The optimized integer formula was supplied by Wolfgang Solfrank on
"tech-kern@netbsd.org". This fixes problems with e.g FreeBSD TV (fxtv),
RealPlayer-7.0 Beta 2 (PR pkg/10818) and KDE's "kscd".

Implement OSS_GETVERSION.
Accept mixer values above max (100).
Handle the info from AUDIO_MIXER_DEVINFO properly, parts of it is opaque.

branches: 1.30.4;
Implement OSS_SOUND_MIXER_INFO.

branches: 1.29.2; 1.29.8;
Per discussion with Lennart Augustsson, change the behaviour to report emulated
encodings, too. (This is currently an issue with the eso(4) driver, which,
due to different byte orders in playing and recording directions, sets the
emulated flag for all 16-bit encodings, although it could be argued that this
is an unfortunate weakness of the query_encoding() interface.)

Add "use counting" to file entries. When closing a file, and it's reference
count is 0, wait for use count to drain before finishing the close.

This is necessary in order for multiple processes to safely share file
descriptor tables.

Make copyright conform.

branches: 1.26.6;
Add MIDI support. The MIDI devices can be accessed as ``raw'' through
the /dev/rmidiN devices, or with a sequencer interface via /dev/music.
So far the only supported MIDI device is the MPU401 port on SoundBlaster
(and only on SB on isapnp, since we do not have locators with multiple
values yet).

Fix off by 1 error

SETFRAGMENT ignores the high bit.

branches: 1.23.2;
Make the audio API (almost) SunOS compatible.
The changes is to allow some limited mixer manipulation through
the audio device (instead of the mixer device).
This rendered 4 methods in audio_hw_if unused so garbage collect these.

Insert missing NetBSD copyright notices.

Emulate setting the hiwater mark with SETFRAGMENT the right way.
Get rid of some 'register'.

Increase the number of mixer devices the emulation looks at.

Oops, forgot two lines in last commit.

Implement OSS_SNDCTL_DSP_NONBLOCK.

Some more debugging output.

Make sure OSS_SNDCTL_DSP_GETFMTS returns the formats the audio driver
can handle and not just some random guess.
Also add some debugging stuff.

Improve ioctl decoding.
Change mixer name mappings.

branches: 1.14.2;
Make sure the blocksize is always a power of 2 when inspected.
OSS only uses powers of 2 so some programs expect this.
Now Quake works!

Changes to the sudio system:
- It is now possible to handle devices that want "looping" DMA,
e.g. the SoundBlaster correctly. The WSS and SB drivers use this.
To do this several new methods were introduced in audio_hw_if.
- Different silence handling (forced by previous change).
- The audio driver can now be mmap()-ed, but due to problems in
the VM system only for writing for now.
- The OSS (Linux) audio emulation takes advantage of some of the
new features.

In the name of backwards compatibility AUDIO_ENCODING_LINEAR has been
renamed AUDIO_ENCODING_SLINEAR and AUDIO_ENCODING_LINEAR reverts to the
NetBSD 1.2 sematics. A kernel with COMPAT_12 defined will accept
AUDIO_ENCODING_LINEAR and treat it as before, without COMPAT_12 it
will be rejected.

Add missing initialization.

Fix recording source selection bug.

Return audio buffer size in audio_info_t with ioctl() AUDIO_GETINFO.
Use the buffer size to implement one more OSS ioctl().

Convert to new orthogonal audio encoding scheme and implement
some of the new encodings. The change to ioctl AUDIO_GETENC is
NOT backwards compatible.

Improve setting of record source.

* Move the Linux audio emulation into its own directory and rename it
OSS (aka VoxWare) audio emulation.
* Use the OSS audio emulation for Linux and FreeBSD.
* Add mixer emulation to the OSS emulator.

Copy back the format we set in SNDCTL_DSP_SETFMT.

SOUND_PCM_WRITE_CHANNELS -> SNDCTL_DSP_CHANNELS, to match current Linux code.

Emulate the SOUND_PCM_WRITE_CHANNELS ioctl. From PR 3356, by Lennart
Augustsson. Also add hooks for mixer ioctls.

Add RCS Id.

Separate ioctl emulation by group. Add (minimal) audio emulation.

Remove clause 3 and 4 from TNF licenses

branches: 1.11.6; 1.11.8; 1.11.10;
Convert all the system call entry points from:
int foo(struct lwp *l, void *v, register_t *retval)
to:
int foo(struct lwp *l, const struct foo_args *uap, register_t *retval)
Fixup compat code to not write into 'uap' and (in some cases) to actually
pass a correctly formatted 'uap' structure with the right name to the
next routine.
A few 'compat' routines that just call standard ones have been deleted.
All the 'compat' code compiles (along with the kernels required to test
build it).
98% done by automated scripts.

branches: 1.10.4;
Remove all the __P

branches: 1.9.44; 1.9.46; 1.9.52; 1.9.56;
merge ktrace-lwp.

branches: 1.8.2; 1.8.18;
Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.

Pass lwp pointers throughtout the kernel, as required, so that the lwpid can
be inserted into ktrace records. The general change has been to replace
"struct proc *" with "struct lwp *" in various function prototypes, pass
the lwp through and use l_proc to get the process pointer when needed.

Bump the kernel rev up to 1.6V

Make copyright conform.

branches: 1.5.10;
Insert missing NetBSD copyright notices.

* Move the Linux audio emulation into its own directory and rename it
OSS (aka VoxWare) audio emulation.
* Use the OSS audio emulation for Linux and FreeBSD.
* Add mixer emulation to the OSS emulator.

SOUND_PCM_WRITE_CHANNELS -> SNDCTL_DSP_CHANNELS, to match current Linux code.

Emulate the SOUND_PCM_WRITE_CHANNELS ioctl. From PR 3356, by Lennart
Augustsson. Also add hooks for mixer ioctls.

Separate ioctl emulation by group. Add (minimal) audio emulation.

Add support for AFMT_AC3

Remove clause 3 and 4 from TNF licenses

branches: 1.14.6; 1.14.8; 1.14.10;
Add ossaudio support for COMPAT_LINUX32, with help from mrg. With this
change, audio now works on amd64 with native firefox, nspluginwrapper, and
the 32-bit linux flash binaries.

branches: 1.13.6; 1.13.12;
Implement OSS_SNDCTL_DSP_GETODELAY and provide a no-op function
for OSS_SNDCTL_DSP_PROFILE.

branches: 1.12.2; 1.12.14; 1.12.16;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.11.24; 1.11.26; 1.11.30;
merge ktrace-lwp.

branches: 1.10.4;
nuke trailing whitespace

branches: 1.9.24; 1.9.32; 1.9.34;
Implement OSS_GETVERSION.
Accept mixer values above max (100).
Handle the info from AUDIO_MIXER_DEVINFO properly, parts of it is opaque.

branches: 1.8.4;
Fix typo in comment. From Brad <brad@openbsd.org>

Implement OSS_SOUND_MIXER_INFO.

branches: 1.6.2; 1.6.8;
Make copyright conform.

branches: 1.5.6;
Add MIDI support. The MIDI devices can be accessed as ``raw'' through
the /dev/rmidiN devices, or with a sequencer interface via /dev/music.
So far the only supported MIDI device is the MPU401 port on SoundBlaster
(and only on SB on isapnp, since we do not have locators with multiple
values yet).

Insert missing NetBSD copyright notices.

Improve ioctl decoding.
Change mixer name mappings.

branches: 1.2.2;
Changes to the sudio system:
- It is now possible to handle devices that want "looping" DMA,
e.g. the SoundBlaster correctly. The WSS and SB drivers use this.
To do this several new methods were introduced in audio_hw_if.
- Different silence handling (forced by previous change).
- The audio driver can now be mmap()-ed, but due to problems in
the VM system only for writing for now.
- The OSS (Linux) audio emulation takes advantage of some of the
new features.

* Move the Linux audio emulation into its own directory and rename it
OSS (aka VoxWare) audio emulation.
* Use the OSS audio emulation for Linux and FreeBSD.
* Add mixer emulation to the OSS emulator.