Demistify some magic...

While here exclude the second variant of EASC from attaching.

No functional change intended.

mac68k/asc: Nix trailing whitespace.

No functional change intended.

branches: 1.58.40;
Exclude Enhanced Apple Sound Chip (EASC) without support for wavetable mode
used by asc(4).

Add d_discard to all struct cdevsw instances I could find.

All have been set to "nodiscard"; some should get a real implementation.

branches: 1.56.2;
Change (mostly mechanically) every cdevsw/bdevsw I can find to use
designated initializers.

I have not built every extant kernel so I have probably broken at
least one build; however I've also found and fixed some wrong
cdevsw/bdevsw entries so even if so I think we come out ahead.

Remove not yet used stuff

branches: 1.54.2;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.53.30; 1.53.40;
Make this compile (fix an unused variable).

use device_lookup_private to get softc

branches: 1.51.16; 1.51.18; 1.51.20; 1.51.22; 1.51.24;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

branches: 1.50.10;
Merge some of the less invasive changes from the vmlocking branch:

- kthread, callout, devsw API changes
- select()/poll() improvements
- miscellaneous MT safety improvements

branches: 1.49.2; 1.49.4; 1.49.10;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.48.2;
Remove duplicate #includes, patch contributed in private mail
by Slava Semushin <slava.semushin@gmail.com>.

To verify that no nasty side effects of duplicate includes (or their
removal) have an effect here, I've compiled an i386/ALL kernel with
and without the patch, and the only difference in the resulting .o
files was in shifted line numbers in some assert() calls.
The comparison of the .o files was based on the output of "objdump -D".

Thanks to martin@ for the input on testing.

branches: 1.47.20;
merge ktrace-lwp.

branches: 1.46.10;
de-__P, remove register, ansify, b* -> mem*.

__KERNEL_RCSID()

branches: 1.44.6;
merge kqueue branch into -current

kqueue provides a stateful and efficient event notification framework
currently supported events include socket, file, directory, fifo,
pipe, tty and device changes, and monitoring of processes and signals

kqueue is supported by all writable filesystems in NetBSD tree
(with exception of Coda) and all device drivers supporting poll(2)

based on work done by Jonathan Lemon for FreeBSD
initial NetBSD port done by Luke Mewburn and Jason Thorpe

replace the somewhat strange poll routine with standard nopoll() (a.k.a
seltrue())

Use CFATTACH_DECL().

Declare all cfattach structures const.

Merge the gehenna-devsw branch into the trunk.

This merge changes the device switch tables from static array to
dynamically generated by config(8).

- All device switches is defined as a constant structure in device drivers.

- The new grammer ``device-major'' is introduced to ``files''.

device-major <prefix> char <num> [block <num>] [<rules>]

- All device major numbers must be listed up in port dependent majors.<arch>
by using this grammer.

- Added the new naming convention.
The name of the device switch must be <prefix>_[bc]devsw for auto-generation
of device switch tables.

- The backward compatibility of loading block/character device
switch by LKM framework is broken. This is necessary to convert
from block/character device major to device name in runtime and vice versa.

- The restriction to assign device major by LKM is completely removed.
We don't need to reserve LKM entries for dynamic loading of device switch.

- In compile time, device major numbers list is packed into the kernel and
the LKM framework will refer it to assign device major number dynamically.

branches: 1.39.2; 1.39.4; 1.39.8; 1.39.16;
Fixup for bogus assumptions about bus_space_handle_t.

Avoid attaching on the Mac TV, as this system seems to not be
completely backward compatible to the II-series sound hardware.

remove include of <vm/vm.h>. <vm/vm.h> -> <uvm/uvm_extern.h>

remove redudant <vm/pmap.h> includes. <vm/pmap.h> -> <uvm/uvm_pmap.h>

Change the kernel mmap interface so that the offset to map is an
"off_t" and the return value is a "paddr_t" to allow mappings
at offsets past 2^31 bytes. Somewhat inspired by FreeBSD, which
only changed the offset to a "vm_offset_t".

Includes updates for the i386, pc532 and sh3 mmmmap from Jason Thorpe.

branches: 1.34.4;
New callout mechanism with two major improvements over the old
timeout()/untimeout() API:
- Clients supply callout handle storage, thus eliminating problems of
resource allocation.
- Insertion and removal of callouts is constant time, important as
this facility is used quite a lot in the kernel.

The old timeout()/untimeout() API has been removed from the kernel.

branches: 1.33.2;
Change the pmap_extract() interface to:
boolean_t pmap_extract(pmap_t, vaddr_t, paddr_t *);
This makes it possible for the pmap to map physical address 0.

Unfortunately, several changes that are intermingled:
- Add initial IOP support. ADB doesn't work yet for me, but it's here so
that others will be encouraged to work on it. ADB_HW_IOP basically
is configured as a NOP so that serial consoles will continue to work.
- Roll via1_intr and via2_intr into the intr.c scheme--this also required
changing rtclock_intr to grovel the stack differently so that hardclock
gets the right arguments and softclock() doesn't get all reentrant.
- Make via1 interrupts parallel to via2 interrupts--handlers get a pass-
through pointer and we can register handlers. Register via1 interrupt
with intr_establish()--normally level 1, level 6 for A/UX scheme.
- Use intr_establish() to set real via2 interrupt handler instead of the
hacked function pointer.
- Reorganize adb-direct interrupts so that a function call is removed.
- Implement A/UX interrupts for all Quadras right now. We may need to
special case some Quadras, but Linux folks are reporting success on
several models.
- Fix intrnames to be accurate for the normal, PSC, and A/UX interrupt
configurations.

Disable ASC interrupt enabling for now. We don't currently use it, and
it seems to be causing hangs at attach time on LCII's.

branches: 1.30.2; 1.30.4;
vm_offset_t -> {paddr_t, vaddr_t}

fix problems in many d_mmap routines:
- returned EOPNOTSUPP rather than -1.
- no check for negative offset.
many of these fix potential security problems in these drivers.


XXX XXX XXX
the d_mmap cdev routine should be changed to have a prototype like:
paddr_t (*d_mmap) __P((dev_t, off_t, int));

by someone!

Initialize and enable an interrupt handler, which currently doesn't
actually do anything.

Move on-board I/O and NuBus drivers to their own directories
via repository copy, and make the necessary adjustments to reflect
the moved files.

Update for bus.h changes.

Update for changes to config.

Remove advertising clause.

Set up base address of ASC for IIfx, per GtMFH.

Make #include directives consistent. All MD headers are of the form:

#include <mac68k/{dev,mac68k}/foo.h>

branches: 1.21.4;
s/mac68k_btop/m68k_btop/

Update copyright and license.

Remove redundant info from bus_space_map() diagnostic in ascattach()

Add a bus space tag field to obio_attach args, initialize it in
obio_search(), and use it in the ASC driver. Thanks to Jason for
pointing this out. Minor KNFing while I'm here.

Complete revamp of Apple Sound Chip support. The ASC can now be accessed
as a real device whose registers and buffers are available through mmap(2),
which makes further development of the driver considerably less painful.

branches: 1.16.2;
Convert to bus.h; this removes the need for the ASCBase global.

Convert all foo_match() functions to use a `struct cfdata *' for their
second argument. The NuBus autoconfig code had to be reorganized as a
result of this, and looks much more like a directly-attached bus now.
These changes eliminate __BROKEN_INDIRECT_CONFIG.

Check to make sure that ASCBase is accessable before claiming that we
have an Apple Sound Chip. Make sure that we have configured the device
before allowing accesses to ASC memory. Among other things, this
prevents the 660AV and 840AV from getting a kernel bus error when trying
to beep on the console.

backout previous kprintf change

printf -> kprintf, sprintf -> ksprintf

Prototype for -Wall -Wstrict-prototypes -Wmissing-prototypes -Wno-uninitialized
Also change the device probing scheme to use something a bit more rational.
A current side-effect is that nubus cards are double-mapped. I expect
to fix that shortly.
Also change splclock() to block everything but serial hardware interrupts.

New device attachment scheme:

- split softc size and match/attach out from cfdriver into
a new struct cfattach.

- new "attach" directive for files.*. May specify the name of
the cfattach structure, so that devices may be easily attached
to parents with different autoconfiguration semantics.

Remove bogus assignment.

Fix warning and use __P for prototypes.

First pass of KNFication. Needs more.

new RCS ID format.

Make this into more of a device so it can be probed and attached. Nuke
RCS/CVS Log. Make ASCBase an offset instead of an absolute.

branches: 1.4.2;
Minor mods. Get rid of constants, or update to use a better default
value.

Missed some warnings...

Clean up some warnings, mainly w/ timeout().

Add basic sound support and a beeping (instead of flashing) console...
from Brad Grantham.

Fix full duplex recording for the later version of the EASC.

The status reported for fifo a is inverted on the later version of the EASC.

Fix independent volumes when operating in full-duplex mode.

ascaudio(4) now works full duplex! :)

ASC (non enhanced) has only been tested in an emulation though.

Smaller recording block size.

Fixes an issue with audio blocks being skipped especially when the recording
samplerate did not match the hw capabilities.

Missing whitespace.

Rearrange.

Remove unused code.

Add support for 22kHz recording.

Add software volume scaling to recording.

Return initial block of silence when starting recording.

Set non compressed mode for recording.

Add code to configure the Digitally Filtered Audio Chip.

This was the missing puzzle piece to audio recording on the Macintosh.

It is currently experimental and use caution when testing!

It should work on most machines expecpt the PowerBook 5xx and similar
due to the fact they configure the dafc via the power manager.

Add independent audio recording volume control.

Move version identifiers to ascreg.h

No functional change intended.

mac68k/asc: Nix trailing whitespace.

No functional change intended.

Overhaul of ascaudio(4).

Simpler interrrupt function.
Volume control works properly on different variants of EASCs.
Alternate FIFOs identified for some EASCs.

Recording still does not work as yet as microphone audio needs to be routed
to the sound chip. However attempting to record should no longer cause a
lockup or panic.

Match against an EASC chip that reports a different version id.

branches: 1.1.2;
Apple Sound Chip audio support for 68k Macintoshoes.

This provies a sound device and support for wsbell(4).

Manual page to be added in a followup commit.

As posted to port-mac68k.

Add support for 22kHz recording.

Add independent audio recording volume control.

branches: 1.1.2;
Apple Sound Chip audio support for 68k Macintoshoes.

This provies a sound device and support for wsbell(4).

Manual page to be added in a followup commit.

As posted to port-mac68k.

Add code to configure the Digitally Filtered Audio Chip.

This was the missing puzzle piece to audio recording on the Macintosh.

It is currently experimental and use caution when testing!

It should work on most machines expecpt the PowerBook 5xx and similar
due to the fact they configure the dafc via the power manager.

Move version identifiers to ascreg.h

No functional change intended.

mac68k/asc: Nix trailing whitespace.

No functional change intended.

Overhaul of ascaudio(4).

Simpler interrrupt function.
Volume control works properly on different variants of EASCs.
Alternate FIFOs identified for some EASCs.

Recording still does not work as yet as microphone audio needs to be routed
to the sound chip. However attempting to record should no longer cause a
lockup or panic.

branches: 1.1.2;
Apple Sound Chip audio support for 68k Macintoshoes.

This provies a sound device and support for wsbell(4).

Manual page to be added in a followup commit.

As posted to port-mac68k.

split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.7.146; 1.7.156;
Merge the gehenna-devsw branch into the trunk.

This merge changes the device switch tables from static array to
dynamically generated by config(8).

- All device switches is defined as a constant structure in device drivers.

- The new grammer ``device-major'' is introduced to ``files''.

device-major <prefix> char <num> [block <num>] [<rules>]

- All device major numbers must be listed up in port dependent majors.<arch>
by using this grammer.

- Added the new naming convention.
The name of the device switch must be <prefix>_[bc]devsw for auto-generation
of device switch tables.

- The backward compatibility of loading block/character device
switch by LKM framework is broken. This is necessary to convert
from block/character device major to device name in runtime and vice versa.

- The restriction to assign device major by LKM is completely removed.
We don't need to reserve LKM entries for dynamic loading of device switch.

- In compile time, device major numbers list is packed into the kernel and
the LKM framework will refer it to assign device major number dynamically.

branches: 1.6.2; 1.6.4; 1.6.8; 1.6.16;
Change the kernel mmap interface so that the offset to map is an
"off_t" and the return value is a "paddr_t" to allow mappings
at offsets past 2^31 bytes. Somewhat inspired by FreeBSD, which
only changed the offset to a "vm_offset_t".

Includes updates for the i386, pc532 and sh3 mmmmap from Jason Thorpe.

branches: 1.5.4;
New callout mechanism with two major improvements over the old
timeout()/untimeout() API:
- Clients supply callout handle storage, thus eliminating problems of
resource allocation.
- Insertion and removal of callouts is constant time, important as
this facility is used quite a lot in the kernel.

The old timeout()/untimeout() API has been removed from the kernel.

branches: 1.4.16;
Remove advertising clause.

branches: 1.3.4;
Update copyright and license.

Complete revamp of Apple Sound Chip support. The ASC can now be accessed
as a real device whose registers and buffers are available through mmap(2),
which makes further development of the driver considerably less painful.

branches: 1.1.6;
Prototype for -Wall -Wstrict-prototypes -Wmissing-prototypes -Wno-uninitialized
Also change the device probing scheme to use something a bit more rational.
A current side-effect is that nubus cards are double-mapped. I expect
to fix that shortly.
Also change splclock() to block everything but serial hardware interrupts.

Rework avdma to fix PR port-mac68k/56131 as well as add synchronous
transfer support.

According to analysis by Michael Zucca, PSC (DMAC for Quadra/Centris AV)
seems to require that DMA buffer is
(1) aligned to 16-byte boundaries, and
(2) multiple of 16 bytes in size.
If the buffer does not satisfy these constraints, esp.c rev 1.63 and
prior carry out partial PIO to align or shave off it.

However, partial PIO does not always work correctly for combination of
NCR53C94 and PSC, which results in failures observed as port-mac68k/56131.

Also, PIO spoils synchronous transfer, which is timing critical.

Therefore, for buffers that do not satisfy the boundary conditions,
completely stop using PIO and use DMA with ``bounce'' buffers.

This fixes port-mac68k/56131 and enables sync transfer as a big bonus.

Note that bounce DMA does not hurt performance at all. For filesystem
and swap I/O, buffers always satisfy the constraints above, and bounce
DMA is necessary only
(a) when disk is attached, or
(b) for special utilities like fsck(8) or fdisk(8),
as far as I can tell.

Also:

- Stop providing ``DMA-friendly'' sc_imess and sc_omess; transfer for
MSGIN or MSGOUT does not almost certainly satisfy boundary condition
(2). Again, this does not affect performance at all.

- SCSI bus frequency is 20MHz (i.e., 5MB/s for sync transfer) for AV
models, according to ``Quadra 840AV Service Source''.

Remove stray newline. No binary changes.

For avdma, bus_dmamap_create(9) with nsegments = 1, as PSC supports
only one physically contiguous segment in a single DMA transaction.

Slightly improves performance.

Minor cosmetic changes. NFC.

- Use switch instead of if-else-if chain.
- Dedup codes a bit.

Elucidate why synchronous transfer is disabled for AV Macs.

Sync negotiation times out when drive advertises that capability:

----
sd1 at scsibus0 target 1 lun 0: <codesrc, SCSI2SD, 6.0> disk fixed
sd1: 16384 MB, 2088 cyl, 255 head, 63 sec, 512 bytes/sect x 33554432 sectors
sd1: sync (160.00ns offset 15), 8-bit (6.250MB/s) transfers
...
sd1(esp0:0:1:0): esp0: timed out [ecb 0x9f7fc4 (flags 0x1, dleft 8, stat 0)], <state 5, nexus 0x9f7fc4, phase(l 1, c 1, p 1), resid 8, msg(q 0,o 80) DMA active>
sd1(esp0:0:1:0): sync negotiation disabled
sd1(esp0:0:1:0): esp0: timed out [ecb 0x9f7fc4 (flags 0x41, dleft 8, stat 0)], <state 5, nexus 0x9f7fc4, phase(l 1, c 1, p 1), resid 8, msg(q 20,o 80) DMA active> AGAIN
sd1: async, 8-bit transfers
----

This is observed for real SCSI drives as well as SCSI2SD (rev 6.0).

Note that this is not a fallout from DMA patch for AV Macs; timeout
takes place even if ``avdma'' code is forcibly disabled.

No binary changes.

- Add missing \n's to printf(9).
- Whitespace fixes.

branches: 1.58.10;
PR port-mac68k/24883

Support DMA xfer for SCSI adapter of AV Mac (660/840AV), written by
Michael Zucca.

This improves disk I/O performance by nearly one order of magnitude.
In addition, interrupt storm due to heavy disk PIO is resolved.

I'm deeply grateful to Michael Zucca for his analysis of DMA engine
and submission of PR. I also thank Izumi Tsutsui (useful comments on
port-mac68k@) and Martin Husemann (test on 660AV).

PR port-mac68k/24883

Style-only changes in preparation to import AV DMA code:

- G/C unused from esp_softc
- clean up headers:
- prefer <sys/bus.h> over <machine/bus.h>
- G/C unused
- sort
- staticify private functions and variables
- stop using inline qualifier for functions called via function pointers
- use C99 initializer
- provide bus_space_vaddr(9) and use it, instead of using member of
bus_handle_t directly
- use uint*_t:
- u_char --> uint8_t
- u_int*_t --> uint*_t
- use proper names from ncr53c9xreg.h instead of magic numbers
- and some KNF, and etc.

No functional changes intended.

no need to include <machine/param.h> if <sys/param.h> already included

branches: 1.55.38; 1.55.40;
Replace few simple_lock(9) cases.

branches: 1.54.2; 1.54.6;
ncr53c9x was converted to use mutex(9), follow that. Fix DEBUG build too.

Include sys/simplelock.h to use simple_lock(); fix build.

Use lwp_getpcb() on m68k ports, clean from struct user usage.

esp_quick_dma_go() gets called from the MI ncr53c9x_intr() handler,
which protects itself against multiple invocation with a
simple_lock. Follow the example of ncr53c9x_poll() for servicing an
interrupt that came while we run in splhigh(), and 'manually' unlock
the MI handler for calling ncr53c9x_intr().

Fixes PR mac68k/38758.

branches: 1.50.2; 1.50.4; 1.50.6;
Split device_t/softc for MI ncr53c9x and some related devices,
with various cleanup.

branches: 1.49.16;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

branches: 1.48.10;
On my LC630 64KB DMA xfer causes timeout errors
so limit sc_maxxfer size to 63KB.

branches: 1.47.2; 1.47.4; 1.47.10;
Previous fix is not correct. sc_dmaaddr is actually
pointer against pointer, so just use proper casts
rather than bogus void pointers.

Add two instances of an overlooked indirection.

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.44.14; 1.44.16;
Use the SI capitalization for "Hz", "kHz", and "MHz" in comments and strings.
Add a space between numbers and Hz unit.

branches: 1.43.4; 1.43.6; 1.43.8; 1.43.10;
__asm__ -> __asm
__const__ -> const
__inline__ -> inline
__volatile__ -> volatile

Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

branches: 1.40.2;
Fixes for volatile problems

use attach args instead of dv_unit, just like cf_unit.

branches: 1.38.2;
only one of the obio locators was actually used, so get rid of the others
and collapse the two variations of obio into one. use the remaining locator
("addr") to differentiate the two possible esp and sbc devices (instead of
using the unit number).

branches: 1.37.2;
really ansify.

de-__P, remove register, ansify, b* -> mem*.

__KERNEL_RCSID()

branches: 1.34.6;
Use CFATTACH_DECL().

Declare all cfattach structures const.

remove trailing \n in panic(). approved perry.

Don't use multi-line string literals.

branches: 1.30.8;
Correct operation of non-pseudo-DMA mode. Used on 660 & 840 AV models.
From Takeshi Shibagaki<ie9t-sbgk@asahi-net.or.jp>.

branches: 1.29.2; 1.29.8;
Pull up the thorpej_scsipi branch to main branch.
This is a completely rewritten scsipi_xfer execution engine, and the
associated changes to HBA drivers. Overview of changes & features:
- All xfers are queued in the mid-layer, rather than doing so in an
ad-hoc fashion in individual adapter drivers.
- Adapter/channel resource management in the mid-layer, avoids even trying
to start running an xfer if the adapter/channel doesn't have the resources.
- Better communication between the mid-layer and the adapters.
- Asynchronous event notification mechanism from adapter to mid-layer and
peripherals.
- Better peripheral queue management: freeze/thaw, sorted requeueing during
recovery, etc.
- Clean separation of peripherals, adapters, and adapter channels (no more
scsipi_link).
- Kernel thread for each scsipi_channel makes error recovery much easier
(no more dealing with interrupt context when recovering from an error).
- Mid-layer support for tagged queueing: commands can have the tag type
set explicitly, tag IDs are allocated in the mid-layer (thus eliminating
the need to use buggy tag ID allocation schemes in many adapter drivers).
- support for QUEUE FULL and CHECK CONDITION status in mid-layer; the command
will be requeued, or a REQUEST SENSE will be sent as appropriate.

Just before the merge syssrc has been tagged with thorpej_scsipi_beforemerge

branches: 1.28.2;
Handle the TRPAD case a little better.
Also, if the so-called DMA operation is a write and ends without target-
complete set, count the data in the FIFO as residual and add that to the
amount in the counters. Hauke Fath reports that this passes early testing
on his Quantum Viking.

Do not try to second-guess the ncr53c9x driver by setting *dmasize to 0
if it is 64k. TCL and TCM will be set properly if we just leave it alone.
Not only that, the ncr53c9x driver issues TRPAD or TRANS based on this
value. We do not want TRPAD in this case!

Rework the esp driver a little bit to improve performance. This requires
an ugly bit where we record the value of a2 while handling a "nofault" bus
error in locore.s in order to know how far the transaction got before a
disconnect (see esp.c comments for more details on this).
Also get rid of a loop (and delay()!) in the interrupt routine--hinted at
and researched by Chas Williams <chas@cmf.nrl.navy.mil>.

branches: 1.25.2;
Have MI ncr53c9x_attach() the 2nd and 3rd arguments for scsipi_adater
and scsipi_device respectively, with size reduction of ncr53c9x_softc.
Specifying NULL instructs the driver to use default adapter and default
device codes. Every target port has ncr53c9x_attach(sc, NULL, NULL) anyway.

branches: 1.24.4;
Program the 53c96's interrupt routing info into the VIA before doing
anything that might cause an interrupt (e.g. the SCSI bus reset in
ncr53c9x_attach()). If we don't do this, the initial interrupt is
lost, thus causing the state machine to never enter IDLE state, thus
causing SCSI commands to never be executed.

Fixes kern/8544, reported by Erik Bertelsen <erik@mediator.uni-c.dk>.

branches: 1.23.2; 1.23.4; 1.23.6;
Undo some of my recent changes that were misguided.

Remove some register declarations.
Get Q9x0 dual SCSI at least basically working.
Be paranoid about some register reads.

Raise spl4 to spl6 in quick_go--I am now experimenting with interrupts
at levels 5 (sound) and 6 (via1) on the Q700.
Raise splhigh when reading and writing registers. It's ugly, but it's
possible that we could get an interrupt from a higher-level source,
causing a re-read of a memory location.
This is not good when, e.g., we are reading the interrupt register.
Ideally, we would just raise splhigh() in ncr53c9x_readregs(), but
that's m.i. code, and it may be expensive on other architectures.

branches: 1.20.2; 1.20.6;
vm_offset_t -> {paddr_t, vaddr_t}

Adapt to the new scsipi_adapter interface.

Garbage-collect the open_target_lu and close_target_lu entry points from
struct scsipi_adapter; they were not used.

Add a scsipi_ioctl entry point to struct scsipi_adapter. This will be
used to issue ioctl commands to the host adapters.

Inspired by PR #6090, from Matt Jacob.

Relinquish my copyright claims on this file.

Get both SCSI busses operational on the Q900 and Q950.

Move on-board I/O and NuBus drivers to their own directories
via repository copy, and make the necessary adjustments to reflect
the moved files.

Update for changes to config.

* Disable parity checking on all devices until we find a better way to
deal with cheap CD-ROMs and other devices that do not appear to have
any way to enable parity generation. In the future, it might be nice
to have this configurable on a per-device basis with back-to-back
parity errors automatically disabling parity for the device. That
would require some MI changes.
* Handle unaligned and odd-length transfers.
This could probably be handled better in the future.

A first cut at faster SCSI for non-AV quadras. Could probably perform better,
but is a marked improvement. This takes advantage of a pseudo-DMA hardware
hack of Apple's that exposes a 16-bit register that the Apple-designed
memory controller acts like a DMA controller and handshakes into or out
of the FIFO. Wierd.

branches: 1.11.4;
Merge scsipi branch in the mainline. This add support for ATAPI devices
(currently only CD-ROM drives on i386). The sys/dev/scsipi system provides 2
busses to which devices can attach (scsibus and atapibus). This needed to
change some include files and structure names in the low level scsi drivers.

branches: 1.10.2; 1.10.4;
Copyright foo.

Fix prototype for espmatch()

Convert to generalized VIA interrupt registration

mac68k-specific portion of m.i. ncr53c9x driver.

branches: 1.6.6;
Convert all foo_match() functions to use a `struct cfdata *' for their
second argument. The NuBus autoconfig code had to be reorganized as a
result of this, and looks much more like a directly-attached bus now.
These changes eliminate __BROKEN_INDIRECT_CONFIG.

Fill in sc_link.max_target

- Move offset for 2nd scsi controller (Q900/Q950/WGS95) to 0x402
instead of 0x400.
- Restructure interrupt handling for more performance--continue to
read/write data as long as the device keeps us in a data xfer phase.
There is still a lot of room for speed improvement here. Perhaps it
lies is speeding up the interrupt path in general?

Improve reliability on my Q700, at least. Was getting the occasional
glitch--an extra byte on occasion.

macs with scsibase offset 0x10000 from iobase use a SCSI CLK of 16.5MHz
(off PrimeTime)--all others appear to use 25MHz.

Interrupt-driven, but slow, NCR 53c96 driver for the 040-based macs. Contains
some guesses for the machines that have two of these buggers (I don't have
such a machine). This driver is a copy of the sparc/alpha esp with a
minimum of changes--after we get it performing a bit more respectably,
we should see about re-normalizing the sources.

Rework avdma to fix PR port-mac68k/56131 as well as add synchronous
transfer support.

According to analysis by Michael Zucca, PSC (DMAC for Quadra/Centris AV)
seems to require that DMA buffer is
(1) aligned to 16-byte boundaries, and
(2) multiple of 16 bytes in size.
If the buffer does not satisfy these constraints, esp.c rev 1.63 and
prior carry out partial PIO to align or shave off it.

However, partial PIO does not always work correctly for combination of
NCR53C94 and PSC, which results in failures observed as port-mac68k/56131.

Also, PIO spoils synchronous transfer, which is timing critical.

Therefore, for buffers that do not satisfy the boundary conditions,
completely stop using PIO and use DMA with ``bounce'' buffers.

This fixes port-mac68k/56131 and enables sync transfer as a big bonus.

Note that bounce DMA does not hurt performance at all. For filesystem
and swap I/O, buffers always satisfy the constraints above, and bounce
DMA is necessary only
(a) when disk is attached, or
(b) for special utilities like fsck(8) or fdisk(8),
as far as I can tell.

Also:

- Stop providing ``DMA-friendly'' sc_imess and sc_omess; transfer for
MSGIN or MSGOUT does not almost certainly satisfy boundary condition
(2). Again, this does not affect performance at all.

- SCSI bus frequency is 20MHz (i.e., 5MB/s for sync transfer) for AV
models, according to ``Quadra 840AV Service Source''.

PR port-mac68k/24883

Support DMA xfer for SCSI adapter of AV Mac (660/840AV), written by
Michael Zucca.

This improves disk I/O performance by nearly one order of magnitude.
In addition, interrupt storm due to heavy disk PIO is resolved.

I'm deeply grateful to Michael Zucca for his analysis of DMA engine
and submission of PR. I also thank Izumi Tsutsui (useful comments on
port-mac68k@) and Martin Husemann (test on 660AV).

PR port-mac68k/24883

Style-only changes in preparation to import AV DMA code:

- G/C unused from esp_softc
- clean up headers:
- prefer <sys/bus.h> over <machine/bus.h>
- G/C unused
- sort
- staticify private functions and variables
- stop using inline qualifier for functions called via function pointers
- use C99 initializer
- provide bus_space_vaddr(9) and use it, instead of using member of
bus_handle_t directly
- use uint*_t:
- u_char --> uint8_t
- u_int*_t --> uint*_t
- use proper names from ncr53c9xreg.h instead of magic numbers
- and some KNF, and etc.

No functional changes intended.

branches: 1.7.92;
Split device_t/softc for MI ncr53c9x and some related devices,
with various cleanup.

branches: 1.6.126;
Rework the esp driver a little bit to improve performance. This requires
an ugly bit where we record the value of a2 while handling a "nofault" bus
error in locore.s in order to know how far the transaction got before a
disconnect (see esp.c comments for more details on this).
Also get rid of a loop (and delay()!) in the interrupt routine--hinted at
and researched by Chas Williams <chas@cmf.nrl.navy.mil>.

branches: 1.5.16; 1.5.26;
Forgot a declaration in last change to esp.c.

A first cut at faster SCSI for non-AV quadras. Could probably perform better,
but is a marked improvement. This takes advantage of a pseudo-DMA hardware
hack of Apple's that exposes a 16-bit register that the Apple-designed
memory controller acts like a DMA controller and handshakes into or out
of the FIFO. Wierd.

branches: 1.3.8;
mac68k-specific portion of m.i. ncr53c9x driver.

branches: 1.2.6;
Improve reliability on my Q700, at least. Was getting the occasional
glitch--an extra byte on occasion.

Interrupt-driven, but slow, NCR 53c96 driver for the 040-based macs. Contains
some guesses for the machines that have two of these buggers (I don't have
such a machine). This driver is a copy of the sparc/alpha esp with a
minimum of changes--after we get it performing a bit more respectably,
we should see about re-normalizing the sources.

Add genfb(4) driver for mac68k grfbus.
1, 2, 4, 8, 15, and 32 color-depths are supported.

ANSI colors on console are functional for depth >= 4.

Graphic applications based on wsfb API should work, provided
they can correctly handle fbi_fboffset and your color depth.

wsfb driver of Xorg 1.20 and mlterm-fb (framebuffer version of
x11/mlterm) work fine for depth == 1 || depth >= 8.

For depth == 8 (256 colors), graphic applications require
colormap callback, which is currently supported for some
internal graphic adapters, and only Civic (found on Quadra
AV series) was tested. Register definition and its usage are
taken from Linux. You can easily support other adapters if
Linux supports that.

Have fun, and any problem reports are welcomed!

branches: 1.58.38;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.57.54; 1.57.64;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

Pack all global video-related variables into a structure for clarity.

A comment said that they weren't in a struct for speed reasons but...
this should not affect performance because these variables are mostly
used to set other variables (hence they are read few times).

Move the definition of multiple video-related variables into a new
header file (machine/video.h) so that we can kill all the "manual"
externs spread around the code (which were inconsistent among them).

Split the global videosize variable into videowidth and videoheight:
makes the code clearer and avoids multiple parts of it having to know
how videosize was encoded.

branches: 1.53.2; 1.53.10; 1.53.14; 1.53.18; 1.53.20;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.52.26;
merge ktrace-lwp.

branches: 1.51.10;
de-__P, remove register, ansify, b* -> mem*.

__KERNEL_RCSID()

branches: 1.49.6;
Use CFATTACH_DECL().

Declare all cfattach structures const.

branches: 1.47.4; 1.47.8;
Unmap the valkyrie register space when we're finished with it in
the match function. It's not like we can save that state for later,
and we don't use it anyway.

Fix PR 11000: The esp driver needs two longwords in DAFB register space to
implement pseudo-DMA transfers with the SCSI controller. This caused our
match to fail when we couldn't map the entire DAFB register/control space
for our own use. Instead, we map only (about) what we will need in two
separate regions.

As a consequence we no longer do Turbo SCSI configuration here; indeed, it
may have caused us trouble later on if we actually changed the values
stored in those registers in the esp driver.

Fixup for bogus assumptions about bus_space_handle_t.

branches: 1.44.4;
Merge wscons work onto the main development branch.

branches: 1.43.2;
The Quadra 605 and LC 47x apparently share the same logic board,
and hence need the same video hack. From Ken'ichi Ishizaka.

From Ken'ichi Ishizaka: correct the calculation of the frame buffer
offset by masking off garbage bits in the DAFB v7. This has been
tested at all resolutions and common color depths on the LC47x.

branches: 1.41.2; 1.41.4;
Add RBV monitor sense code (formerly commented out in rbv_vidstatus())
to the match function, and print out more detailed information when
attaching RBV video.

Remove an extraneous printf when attaching a Valkyrie.

Match grf_obio devices correctly for the 58x/63x.

Add a comment regarding the broken behavior of the DAFB v7.

The Performa/LC 58x have a Valkyrie, not the DAFB.

New and improved console framebuffer initialization and autoconfig. This
resolves a great many issues, including Performa 58x interrupt handling
and offset displays on some models.

Programs that depend on the old (pre-NetBSD 1.1) grf interface may break.
That's actually a separate issue uncovered by this code, not caused by it.

Add a GRF_COMPAT option so that old-style grf ioctl() code can be
removed from the kernel.

Kill unused variable that resulted from the last change.

Store the PA of the framebuffer in the softc. This eliminates the need
for the sc_phys callback; we can just store the PA in the grfbus attach
args, rather than a function pointer, which simplifies the code nicely.

Move on-board I/O and NuBus drivers to their own directories
via repository copy, and make the necessary adjustments to reflect
the moved files.

The monitor sense code we have is not reliable on DAFB-based machines with
certain 17" monitors. Change from Michael R. Zucca, PR 4988.

XXX - This can cause problems on system with the DAFB chip which currently
use only a NuBus-based video adapter. In particular, grf devices may not be
attached properly in this case. This unfortunate situation is less annoying
than not having a reasonable console, however. A reasonable, reliable
monitor sense algorithm for the DAFB would resolve the problem.

Disable Valkyrie interrupts on the Quadra 630. Part of a change
from Michael R. Zucca, PR 4988.

Update for bus.h changes.

Update for changes to config.

KNF: Fix some whitespace inconsistencies.

Force the probe to find the internal video for the 63x/575 models.

branches: 1.25.2;
Disable video interrupts on the AV machines. Thanks to Michael R. Zucca
(mrz5149@cs.rit.edu) for the addresses and hints as to how the interrupts
might be disabled, and thanks to Henry Hotz (h.b.hotz@jpl.nasa.gov) for
testing on the 840AV.
Unmap the DAFB regs on the other Quadras after attachment. They're not
used.

Fix grf{i,m}v_phys() prototypes.

Overhaul grf drivers to correct recent problems with X and dt
(address error faults), as well as other reported problems:

- Simplify grfmv_phys() to work like grfiv_phys(), and eliminate the
second argument to both, as we don't use it anyway.
- Handle fbbase and fboff consistently throughout. Closes PR 3862.
- Eliminate grfaddr() by pulling it into grfmmap(), which is the
only place it was used, previously.
- grfmap() now gets the physical address of the framebuffer from
the appropriate driver, rather than try to compute it by itself.
Be careful with aligning the base to a page address and increase
the length of the mapped region appropriately. Closes PR 2867.

branches: 1.22.2;
KNF

s/mac68k_trunc_page/m68k_trunc_page/

Take care when accessing DAFB--some quadra-class machines use other video
controllers.

Remove tag.

- Support DAFB machines mo' better. Actually detect if a monitor is
present and initialize a few things. No color support, yet.
- Properly disable interrupts for DAFB.
- Rearrange for better nubus display card interrupt support. Only register
an interrupt if we know how to clear it.
- Complain if we don't know about a given display card and can not install
an interrupt handler.
- Change MYSTERY stuff to cb264--still need to get the DrSW so we can
actually call the routine to clear an interrupt from this card.

We need bus.h now, due to recent nubus_attach_args change.

branches: 1.16.6;
Convert all foo_match() functions to use a `struct cfdata *' for their
second argument. The NuBus autoconfig code had to be reorganized as a
result of this, and looks much more like a directly-attached bus now.
These changes eliminate __BROKEN_INDIRECT_CONFIG.

backout previous kprintf change

printf -> kprintf, sprintf -> ksprintf

Add a way to tell grf_establish() that internal video doesn't actually
occupy a slot. This is necessary so that GRFIOCMAP can find the correct
physical address of the framebuffer. Fixes P550, some LC models, and
perhaps the PB520.

branches: 1.12.4;
New grf attachment code, mostly by Jason Thorpe with some cleanup by me.
This will allow dt and X to work with a generic kernel, rather than
compiling different kernels that attach grf0 to a NuBus adapter or
internal video.

Prototype for -Wall -Wstrict-prototypes -Wmissing-prototypes -Wno-uninitialized
Also change the device probing scheme to use something a bit more rational.
A current side-effect is that nubus cards are double-mapped. I expect
to fix that shortly.
Also change splclock() to block everything but serial hardware interrupts.

Don't fake these values.

Nuke int_video_start in favor of consistent use of mac68k_vidlog.
Don't find the internal video more than once.
Probe for internal video before nubus instead of after.

Be consistent and use mac68k_vidlog instead of int_video_start.

Fix the internal video probe again.

Don't show up in "slot" 0xe.\n

Add another routine for the grf display-specific drivers to return a physical
address.

First cut at a kludge for IIvx internal video.

Set and use new fboff element from grfmode structure.

Be a bit more careful on the probe... Make sure that the current slot's
addresses contain the int_video_start--or assume that internal video is
is "slot" 0xE.

Add new nubus handling that's much more robust.
Update via, if_ae, and grf accordingly.
Revamp grf.

branches: 1.1.10;
Add genfb(4) driver for mac68k grfbus.
1, 2, 4, 8, 15, and 32 color-depths are supported.

ANSI colors on console are functional for depth >= 4.

Graphic applications based on wsfb API should work, provided
they can correctly handle fbi_fboffset and your color depth.

wsfb driver of Xorg 1.20 and mlterm-fb (framebuffer version of
x11/mlterm) work fine for depth == 1 || depth >= 8.

For depth == 8 (256 colors), graphic applications require
colormap callback, which is currently supported for some
internal graphic adapters, and only Civic (found on Quadra
AV series) was tested. Register definition and its usage are
taken from Linux. You can easily support other adapters if
Linux supports that.

Have fun, and any problem reports are welcomed!

Remove unnecessary <sys/malloc.h> include.

Add rnd(9) support.

branches: 1.18.50;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.17.78; 1.17.88;
Fix this so that it builds after sc_txbuf and sc_rxbuf no longer are void*.

branches: 1.16.2;
Convert DMA memory allocation to bus_dmamem_alloc. From Dave Huang.

branches: 1.15.20; 1.15.22; 1.15.24;
merge ktrace-lwp.

branches: 1.14.10;
de-__P, remove register, ansify, b* -> mem*.

Update David Huang's email address in the license
per his request in PR 24907.

__KERNEL_RCSID()

branches: 1.11.2;
Use PAGE_SIZE rather than NBPG.

merge the 12 copies of vm_machdep.c on the m68k platforms.
clean up some other stuff along the way, including:
- use m68k/cacheops.*, remove duplicates from cpu.h.
- centralize a few declarations in (all the copies of) cpu.h.
- define M68K_VAC on platforms which have a VAC.
- switch the sun platforms to the (now common) proc_trampoline().
- do the phys_map thang on the sun platforms too, no reason not to.

Use CFATTACH_DECL().

Declare all cfattach structures const.

branches: 1.7.4; 1.7.8;
remove include of <vm/vm.h>. <vm/vm.h> -> <uvm/uvm_extern.h>

branches: 1.6.16;
mac68k/obio/if_mc_obio.c needs hide/integrate defines, too. Moved back to
if_mcvar.h.

Move on-board I/O and NuBus drivers to their own directories
via repository copy, and make the necessary adjustments to reflect
the moved files.

Update for bus.h changes.

NetBSD RCSIds.

Check for machine class, not for PSCBase as initial check in mc_obio_match().

branches: 1.1.2;
Add in the if_mc ethernet driver for the AMD "MACE" part. This is the
internal ethernet on the Quadra/Centris 660av/840av.
Add initial support for the PSC (DMA controller) to support the above
(DMA SCSI remains unsupported). This involved also changing the way
that several interrupts are handled.
Above from David Huang <khym@bga.com>
Since the interrupts changed somewhat, we must also make the ipls
dynamic, defaulting to their prior levels and adjusted for the AVs.
I modelled this on the hp300.

sn(4): Add rnd(9) support.

branches: 1.28.102;
Split softc/device_t and misc cleanup for sn(4).

branches: 1.27.16; 1.27.18;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

branches: 1.26.10;
Switch mac68k's sn(4) Ethernet to MI SONIC driver.

Tested with Apple Ethernet CS Twisted-Pare Card on LC630 by me
and Quadra 650 on-board Ethernet by hauke@.
NuBus based cards and PowerBook variants are still untested.

branches: 1.25.30; 1.25.32; 1.25.38;
merge ktrace-lwp.

branches: 1.24.10;
de-__P, remove register, ansify, b* -> mem*.

__KERNEL_RCSID()

branches: 1.22.2;
Use PAGE_SIZE rather than NBPG.

Use CFATTACH_DECL().

Declare all cfattach structures const.

branches: 1.19.16; 1.19.20;
Normalize autoconfig output.

Unfortunately, several changes that are intermingled:
- Add initial IOP support. ADB doesn't work yet for me, but it's here so
that others will be encouraged to work on it. ADB_HW_IOP basically
is configured as a NOP so that serial consoles will continue to work.
- Roll via1_intr and via2_intr into the intr.c scheme--this also required
changing rtclock_intr to grovel the stack differently so that hardclock
gets the right arguments and softclock() doesn't get all reentrant.
- Make via1 interrupts parallel to via2 interrupts--handlers get a pass-
through pointer and we can register handlers. Register via1 interrupt
with intr_establish()--normally level 1, level 6 for A/UX scheme.
- Use intr_establish() to set real via2 interrupt handler instead of the
hacked function pointer.
- Reorganize adb-direct interrupts so that a function call is removed.
- Implement A/UX interrupts for all Quadras right now. We may need to
special case some Quadras, but Linux folks are reporting success on
several models.
- Fix intrnames to be accurate for the normal, PSC, and A/UX interrupt
configurations.

branches: 1.17.8; 1.17.12;
defopt INET, NETATALK.

The Performa 58x comm slot SONIC cards behave the same way as in
the LC/Performa 57x. From Yasuhiro Endoh.

Move on-board I/O and NuBus drivers to their own directories
via repository copy, and make the necessary adjustments to reflect
the moved files.

Update for bus.h changes.

For the LC575/Q630 (comm-slot machines), try to derive the card settings.
Unfortunately, there does not seem to be a good way to determine what
variety of comm-slot card is present in a machine. There is still an
interrupt issue preventing these cards from working--hopefully that will
be ironed out shortly.

branches: 1.12.2;
Probe for the SONIC before saying that we found it. Some early Centris
models (low-end) shipped without ethernet installed.

Make #include directives consistent. All MD headers are of the form:

#include <mac68k/{dev,mac68k}/foo.h>

branches: 1.10.4;
Update from Denny Gentry <denny1@home.com>, PR 3685:

Simplify the way transmit buffers are managed, remove assumptions about
NBPG, simplify sonic_get handling, update snioctl to be more like other
current drivers, and probably a few other changes I've now forgotten about.

If we can't map SONIC register space, just print a diagnostic message and
continue. Make formatting consistent and KNF while here.

Some updates based on information from Bob Nestor <rnestor@metronet.com>
about his SONIC-T LC/PDS card.

Changes from Denny Gentry <denny1@home.com>:
Change in the way receive buffer areas are handled. Before we gave
the chip 16 buffers, each 1536 bytes (big enough for one packet).
Now we're handing the chip 8 buffers, each 4 Kbytes, and letting
the chip fit as many packets as it can in each one. This should
help keep it from running out of buffer space. Also make some of
the performance-crucial routines inline. It made no measurable
difference except to make me feel better

Changes from Bob Nestor <rnestor@metronet.com> to get closer to support
for his Apple SONIC-based nubus card.

Changes from me to try to get SONIC's MAC address from MacOS settings if
we can't read the PROM space.

Do not set DCR_SYNC for the C/Q[68]xx systems.
Thanks to Steve Brown <sbrown@best.com> for working with me to find this.

Some new SONIC code from Denny Gentry <denny1@home.com> with a couple of
tweaks and bug fixes by yours truly.

Here's what Denny had to say:

nubus.h:
- add a drsw entry for my card
[ I also added a couple of constants for more display cards ]
if_sn.c:
- allocate sc->space using malloc (Scott wanted this).
- make csr accesses use NIC_PUT/GET, remove sc->sc_csr.
- add multicast and IFF_PROMISC support. multicast isn't
well tested, but I made sure the unicast case still
works.
- finish the new arp interface, remove sc->sc_enaddr
if_snreg.h:
- remove struct sonic_reg
if_snvar.h:
- add NIC_PUT and NIC_GET macros a la if_ae
- remove sc_txhead, it isn't used.
if_sn_nubus.c:
- clean up support for my SE/30 card.
- Move add_nubus_intr from if_sn.c (to keep if_sn.c MI)
if_sn_obio.c:
- make Q610, C610, Q650, C650, Q800 use EXBUS.
- PB500 had a "return" where "break" was intended. PB500
probably wasn't working.
- move add_nubus_intr from if_sn.c.
- add an "explanation" why Apple's ethernet addr is encoded
in token ring format in the PROM.

Fix bug that would have prevented PB5xx series from detecting the SONIC.
Bug noticed by Denny Gentry.

Make this compile again. XXX - save ethernet address in softc until multicast is supported.

On request from Allen Briggs, converted this to new ARP
system. Somebody should actually test if this compiles (and works) on
Mac68k... I only carefully checked cvs diff -u.

SONIC driver--originally from pica. Much work done by Dennis Gentry and
Takeshi Yanagisawa to get it working. Some minor hacking by me here and
there.

When checking the sector header don't bypass the retry counter.

branches: 1.7.54;
avoid trigraph

branches: 1.6.18; 1.6.36;
Fix an embarassing tyop. gcc should run aspell over the comments...

branches: 1.5.20;
Switch files I authored to two-clause BSD license.

branches: 1.4.108; 1.4.110; 1.4.112; 1.4.114;
Get rid of error -66 (sector not found).

From Hauke Fath <hauke@Espresso.Rhein-Neckar.DE>

branches: 1.3.8;
prepare for ELF:
- add "%" prefix to register names in assembly code.
- use _C_LABEL() where necessary.
- use packed structures where necessary to match the old ABI.

branches: 1.2.22; 1.2.26;
Update from Hauke to resolve some relatively severe performance problems.

branches: 1.1.2;
First cut at a floppy disk device driver, for IWM and IWM-compatible
controllers. Supports GCR-encoded disks only (400K and 800K); neither
of the 1.44M formats will work until someone figures out how to drive
the SWIM and its descendants.

This code was written by Hauke Fath, and had only minor touchup (mostly
KNF) by me.

Sync the iwm_match() code with the comments (and intentions), and fix
the conditions to match the right machines.

For matched hardware, we set IWMBase and break out of the case block; the
default is no match.

Merge thorpej-cfargs2.

branches: 1.60.4;
We do not match machines whose SWIM does not support the IWM register
set used by this driver (SWIM II/III, SWIM behind IOP, AV models' DMA
based controllers). Unfortunately, this distinction does not run
cleanly along MACH_CLASS* lines, and we have to look at MACH_MAC{model} tags.

branches: 1.59.2; 1.59.4;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.58.2;
malloc(9) -> kmem(9)

branches: 1.57.8;
Add missing initialization of sc_dev.

branches: 1.56.10; 1.56.18; 1.56.22;
Use C99-style initializers for struct dkdriver.

fix typo

We have three sets of DTYPE_ constants in the kernel:
altq Drop Type
disklabel Disk Type
file Descriptor Type
(not to mention constants that contain the string DTYPE).
Let's make them two, by changing the disklabel one to be DisK TYPE since the
other disklabel constants seem to do that. Not many userland programs use
these constants (and the ones that they do are mostly in ifdefs). They will
be fixed shortly.

name the flag ioctl argument "flag" like most other drivers.

declare error

make more drivers use disk_ioctl, and add a dev parameter to it so that
we can merge the "easy" disklabel ioctls to it. Ultimately all this will
go do dk_ioctl once all the drivers have been converted.

branches: 1.50.4;
Add d_discard to all struct cdevsw instances I could find.

All have been set to "nodiscard"; some should get a real implementation.

Add d_discard to all struct bdevsw instances I could find.

I've set them all to nodiscard. Some of them (wd, dk, vnd, ld,
raidframe, maybe cgd) should be implemented for real.

branches: 1.48.2;
Change (mostly mechanically) every cdevsw/bdevsw I can find to use
designated initializers.

I have not built every extant kernel so I have probably broken at
least one build; however I've also found and fixed some wrong
cdevsw/bdevsw entries so even if so I think we come out ahead.

branches: 1.47.2;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.46.14; 1.46.24;
g/c BUFQ_FOO() macros and use bufq_foo() directly.

Deal with new dev_t build lossage. Fix from lukem.

Remove LKMs and switch to the module framework, pass 1.

Proposed on tech-kern@.

branches: 1.43.2; 1.43.4;
Don't pass fdUnit to lookup softc of iwm. It's a parent of fd, not fd itself.

use device_lookup_private to get softc

branches: 1.41.2;
Switch files I authored to two-clause BSD license.

branches: 1.40.16; 1.40.18; 1.40.20; 1.40.22;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

Merge disk init changes from the vmlocking branch. These seperate init /
destroy of 'struct disk' from attach / detach.

branches: 1.38.4; 1.38.6; 1.38.8;
It's not a good idea for device drivers to modify b_flags, as they don't
need to understand the locking around that field. Instead of setting
B_ERROR, set b_error instead. b_error is 'owned' by whoever completes
the I/O request.

branches: 1.37.2; 1.37.4;
Merge some of the less invasive changes from the vmlocking branch:

- kthread, callout, devsw API changes
- select()/poll() improvements
- miscellaneous MT safety improvements

branches: 1.36.2; 1.36.4; 1.36.10;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.35.26;
merge ktrace-lwp.

- change the way to specify a bufq strategy. (by string rather than by number)
- rather than embedding bufq_state in driver softc,
have a pointer to the former.
- move bufq related functions from kern/subr_disk.c to kern/subr_bufq.c.
- rename method to strategy for consistency.
- move some definitions which don't need to be exposed to the rest of kernel
from sys/bufq.h to sys/bufq_impl.h.
(is it better to move it to kern/ or somewhere?)
- fix some obvious breakage in dev/qbus/ts.c. (not tested)

branches: 1.33.2;
Shadowing and const fixes.

branches: 1.32.2;
handle lack of locators in LKM context differently.

de-__P, remove register, ansify, b* -> mem*.

If LKM deal w. locators different

use the generated macros in locators.h rather than hard-coded numbers
to index the cf_loc[] array. reviewed by allen briggs.

move buffer queue related stuffs from buf.h to their own header, bufq.h.

fix printf formats to match with sys/buf.h 1.75.

use config_found() instead of config_found_sm() if no submatch
function is used

Initialize some "might (not) be used uninitialized" variables.

__KERNEL_RCSID()

branches: 1.23.2;
Change return type of readdisklabel() to const char *
I hope I've found all the correct places!

attempt to fix compilationg errors for printf formats due to 64bit daddr_t
adresses PR port-mac68k/20188 by Hauke Fath

writable, not writeable.

Use aprint_normal() for cfprint routines.

implement separate read/write disk statistics:
- disk_unbusy() gets a new parameter to tell the IO direction.
- struct disk_sysctl gets 4 new members for read/write bytes/transfers.
when processing hw.diskstats, add the read&write bytes/transfers for
the old combined stats to attempt to keep backwards compatibility.

unfortunately, due to multiple bugs, this will cause new kernels and old
vmstat/iostat/systat programs to fail. however, the next time this is
change it will not fail again.

this is just the kernel portion.

merge kqueue branch into -current

kqueue provides a stateful and efficient event notification framework
currently supported events include socket, file, directory, fifo,
pipe, tty and device changes, and monitoring of processes and signals

kqueue is supported by all writable filesystems in NetBSD tree
(with exception of Coda) and all device drivers supporting poll(2)

based on work done by Jonathan Lemon for FreeBSD
initial NetBSD port done by Luke Mewburn and Jason Thorpe

remove local declaration of iwm_cd and fd_cd for LKM case; it's superfluous
and doesn't even compile after latest autoconf changes

Use CFATTACH_DECL().

Declare all cfattach structures const.

make this compile with _LKM.

Merge the gehenna-devsw branch into the trunk.

This merge changes the device switch tables from static array to
dynamically generated by config(8).

- All device switches is defined as a constant structure in device drivers.

- The new grammer ``device-major'' is introduced to ``files''.

device-major <prefix> char <num> [block <num>] [<rules>]

- All device major numbers must be listed up in port dependent majors.<arch>
by using this grammer.

- Added the new naming convention.
The name of the device switch must be <prefix>_[bc]devsw for auto-generation
of device switch tables.

- The backward compatibility of loading block/character device
switch by LKM framework is broken. This is necessary to convert
from block/character device major to device name in runtime and vice versa.

- The restriction to assign device major by LKM is completely removed.
We don't need to reserve LKM entries for dynamic loading of device switch.

- In compile time, device major numbers list is packed into the kernel and
the LKM framework will refer it to assign device major number dynamically.

Convert to new device buffer queue interface.

Tested with help from Hauke Fath <hauke@Espresso.Rhein-Neckar.DE>
on Performa 600 and Quadra 700.

branches: 1.11.6; 1.11.8; 1.11.12; 1.11.20;
fix prototype for fd_mod_free() - should fix port-mac68k/10063

A foolish consistency; most parts of the kernel use bp->b_data, so
change these from bp->b_un.b_addr to bp->b_data, as well. This also
allows us more flexibility to experiment with other data buffer types
hung off of struct buf.

LKM fixes:
* fix a typo in callout_stop() call
* prototype fd_mod_init(), fd_mod_free() to avoid warnings
* include iwm_mod.h

Fix sent in port-mac68k/9787 by Dave Huang.

New callout mechanism with two major improvements over the old
timeout()/untimeout() API:
- Clients supply callout handle storage, thus eliminating problems of
resource allocation.
- Insertion and removal of callouts is constant time, important as
this facility is used quite a lot in the kernel.

The old timeout()/untimeout() API has been removed from the kernel.

Turn off some noise during autoconfig on the IIfx/Q9x0, making it
conditional on the TRACE_CONFIG debugging flag.

Fix a bug in disksort_*() which caused non-optimal ordering when multiple
active partitions were on a single spindle. Add a b_rawblkno member to
struct buf which contains the non-partition-relative block number to sort
by.

Fix PR 9302. Fix provided by Hauke Fath (hauke@Espresso.Rhein-Neckar.DE).

Update for sys/buf.h/disksort_*() changes.

Wrap an otherwise unused variable inside #ifdef DIAGNOSTIC; from Ben Mesander
in PR port-mac68k/8513.

branches: 1.2.8; 1.2.10; 1.2.12;
Update from Hauke to resolve some relatively severe performance problems.

branches: 1.1.2;
First cut at a floppy disk device driver, for IWM and IWM-compatible
controllers. Supports GCR-encoded disks only (400K and 800K); neither
of the 1.44M formats will work until someone figures out how to drive
the SWIM and its descendants.

This code was written by Hauke Fath, and had only minor touchup (mostly
KNF) by me.

Clean up _LKM --> _MODULE leftovers.

Note that _KERNEL is always defined for modules.

split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.14.32; 1.14.42;
Switch files I authored to two-clause BSD license.

branches: 1.13.40; 1.13.42; 1.13.44; 1.13.46;
Need char* for pointer arithmetic done in iwm_fd.c.

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.11.26;
merge ktrace-lwp.

- change the way to specify a bufq strategy. (by string rather than by number)
- rather than embedding bufq_state in driver softc,
have a pointer to the former.
- move bufq related functions from kern/subr_disk.c to kern/subr_bufq.c.
- rename method to strategy for consistency.
- move some definitions which don't need to be exposed to the rest of kernel
from sys/bufq.h to sys/bufq_impl.h.
(is it better to move it to kern/ or somewhere?)
- fix some obvious breakage in dev/qbus/ts.c. (not tested)

branches: 1.9.2;
Shadowing and const fixes.

de-__P, remove register, ansify, b* -> mem*.

branches: 1.7.6;
Merge the gehenna-devsw branch into the trunk.

This merge changes the device switch tables from static array to
dynamically generated by config(8).

- All device switches is defined as a constant structure in device drivers.

- The new grammer ``device-major'' is introduced to ``files''.

device-major <prefix> char <num> [block <num>] [<rules>]

- All device major numbers must be listed up in port dependent majors.<arch>
by using this grammer.

- Added the new naming convention.
The name of the device switch must be <prefix>_[bc]devsw for auto-generation
of device switch tables.

- The backward compatibility of loading block/character device
switch by LKM framework is broken. This is necessary to convert
from block/character device major to device name in runtime and vice versa.

- The restriction to assign device major by LKM is completely removed.
We don't need to reserve LKM entries for dynamic loading of device switch.

- In compile time, device major numbers list is packed into the kernel and
the LKM framework will refer it to assign device major number dynamically.

Convert to new device buffer queue interface.

Tested with help from Hauke Fath <hauke@Espresso.Rhein-Neckar.DE>
on Performa 600 and Quadra 700.

branches: 1.5.8; 1.5.12; 1.5.20;
New callout mechanism with two major improvements over the old
timeout()/untimeout() API:
- Clients supply callout handle storage, thus eliminating problems of
resource allocation.
- Insertion and removal of callouts is constant time, important as
this facility is used quite a lot in the kernel.

The old timeout()/untimeout() API has been removed from the kernel.

Update for sys/buf.h/disksort_*() changes.

branches: 1.3.8;
Update from Hauke to resolve some relatively severe performance problems.

branches: 1.2.2;
Er, function prototypes don't belong in fooreg.h.

First cut at a floppy disk device driver, for IWM and IWM-compatible
controllers. Supports GCR-encoded disks only (400K and 800K); neither
of the 1.44M formats will work until someone figures out how to drive
the SWIM and its descendants.

This code was written by Hauke Fath, and had only minor touchup (mostly
KNF) by me.

This file is no longer used by anything.

Update from Hauke to resolve some relatively severe performance problems.

branches: 1.1.2;
First cut at a floppy disk device driver, for IWM and IWM-compatible
controllers. Supports GCR-encoded disks only (400K and 800K); neither
of the 1.44M formats will work until someone figures out how to drive
the SWIM and its descendants.

This code was written by Hauke Fath, and had only minor touchup (mostly
KNF) by me.

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.7.26;
merge ktrace-lwp.

branches: 1.6.6;
remove some leftover references to a.out symbol names.

branches: 1.5.2; 1.5.4;
de-__P, remove register, ansify, b* -> mem*.

branches: 1.4.2;
writable, not writeable.

branches: 1.3.26;
Update from Hauke to resolve some relatively severe performance problems.

branches: 1.2.2;
Er, function prototypes don't belong in fooreg.h.

First cut at a floppy disk device driver, for IWM and IWM-compatible
controllers. Supports GCR-encoded disks only (400K and 800K); neither
of the 1.44M formats will work until someone figures out how to drive
the SWIM and its descendants.

This code was written by Hauke Fath, and had only minor touchup (mostly
KNF) by me.

Merge thorpej-cfargs2.

branches: 1.26.8;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.25.68;
CFATTACH_DECL(..., sizeof(struct device), -> CFATTACH_DECL_NEW(..., 0
struct device * -> device_t
struct cfdata * -> cfdata_t
use bool when appropriate

branches: 1.24.22; 1.24.32;
Remove clause 3 and 4 from TNF licenses

branches: 1.23.74; 1.23.76; 1.23.78;
merge ktrace-lwp.

s/locdesc_t/int/g

branches: 1.21.2;
adaptions to config_search() change, and minor autoconf fixes, mostly from Havard Eidnes

only one of the obio locators was actually used, so get rid of the others
and collapse the two variations of obio into one. use the remaining locator
("addr") to differentiate the two possible esp and sbc devices (instead of
using the unit number).

branches: 1.19.2;
de-__P, remove register, ansify, b* -> mem*.

Use correct locator name

use the generated macros in locators.h rather than hard-coded numbers
to index the cf_loc[] array. reviewed by allen briggs.

__KERNEL_RCSID()

branches: 1.15.2;
Use aprint_normal() for cfprint routines.

Use CFATTACH_DECL().

Declare all cfattach structures const.

Introduce a new routine, config_match(), which invokes the
cfattach->ca_match function in behalf of the caller. Use it
rather than invoking cfattach->ca_match directly.

Accept the bus_dma_tag_t for obio, too.

branches: 1.10.30; 1.10.34;
Move on-board I/O and NuBus drivers to their own directories
via repository copy, and make the necessary adjustments to reflect
the moved files.

Update for changes to config.

Fix tipo inherited from old version of TNF copyright template.

branches: 1.7.4;
Add hsk and drq locators, which will be used only by SCSI devices.

Add a bus space tag field to obio_attach args, initialize it in
obio_search(), and use it in the ASC driver. Thanks to Jason for
pointing this out. Minor KNFing while I'm here.

branches: 1.5.4;
Revamp mainbus and obio autoconfiguration, with some direction (and the
indirect bus code framework) from Jason Thorpe. This allows us to dump
bus_scan() and bus_print(), and move bus_peek() and bus_mapin() to the
NuBus code (since they'll eventually go away, anyway).

Convert all foo_match() functions to use a `struct cfdata *' for their
second argument. The NuBus autoconfig code had to be reorganized as a
result of this, and looks much more like a directly-attached bus now.
These changes eliminate __BROKEN_INDIRECT_CONFIG.

backout previous kprintf change

printf -> kprintf, sprintf -> ksprintf

Prototype for -Wall -Wstrict-prototypes -Wmissing-prototypes -Wno-uninitialized
Also change the device probing scheme to use something a bit more rational.
A current side-effect is that nubus cards are double-mapped. I expect
to fix that shortly.
Also change splclock() to block everything but serial hardware interrupts.

Remove clause 3 and 4 from TNF licenses

branches: 1.7.74; 1.7.76; 1.7.78;
merge ktrace-lwp.

use the generated macros in locators.h rather than hard-coded numbers
to index the cf_loc[] array. reviewed by allen briggs.

branches: 1.5.10;
Accept the bus_dma_tag_t for obio, too.

branches: 1.4.30; 1.4.34;
Fix tipo inherited from old version of TNF copyright template.

branches: 1.3.4;
Add hsk and drq locators, which will be used only by SCSI devices.

Add a bus space tag field to obio_attach args, initialize it in
obio_search(), and use it in the ASC driver. Thanks to Jason for
pointing this out. Minor KNFing while I'm here.

branches: 1.1.4;
Revamp mainbus and obio autoconfiguration, with some direction (and the
indirect bus code framework) from Jason Thorpe. This allows us to dump
bus_scan() and bus_print(), and move bus_peek() and bus_mapin() to the
NuBus code (since they'll eventually go away, anyway).

Default to sbc drq_intr on the PowerBook 1xx.

I was faced with two options:

1) Downgrade pdma with PDMA_NOWRITE for the PowerBook 1xx. (much slower)

2) Use sbc drq intr (much faster and well tested).

I chose the later...much faster and compatible with more scsi peripherals.

Fallback to the faster option.

Tested thouroughly on my PowerBook 520c for many months.

We have many locks? Choose the right one.
(It was meant to be a spinlock as it can run in an interrupt context).

Serialize drq interrupt.

This results in error free transfers between disks.

Part of PR kern/58452.

branches: 1.25.100;
Use lwp_getpcb() on m68k ports, clean from struct user usage.

replace bitmask_snprintf(9) with snprintb(3)

branches: 1.23.4; 1.23.12;
Split devict_t/softc for ncr5380sbc SCSI, and misc cosmetic changes.

branches: 1.22.62;
Use device_cfdata().

branches: 1.21.4; 1.21.6; 1.21.8; 1.21.10; 1.21.12;
merge ktrace-lwp.

branches: 1.20.4;
use attach args instead of dv_unit, just like cf_unit.

branches: 1.19.2;
only one of the obio locators was actually used, so get rid of the others
and collapse the two variations of obio into one. use the remaining locator
("addr") to differentiate the two possible esp and sbc devices (instead of
using the unit number).

branches: 1.18.2;
de-__P, remove register, ansify, b* -> mem*.

__KERNEL_RCSID()

branches: 1.16.6;
Use CFATTACH_DECL().

Declare all cfattach structures const.

branches: 1.14.2; 1.14.8;
Pull up the thorpej_scsipi branch to main branch.
This is a completely rewritten scsipi_xfer execution engine, and the
associated changes to HBA drivers. Overview of changes & features:
- All xfers are queued in the mid-layer, rather than doing so in an
ad-hoc fashion in individual adapter drivers.
- Adapter/channel resource management in the mid-layer, avoids even trying
to start running an xfer if the adapter/channel doesn't have the resources.
- Better communication between the mid-layer and the adapters.
- Asynchronous event notification mechanism from adapter to mid-layer and
peripherals.
- Better peripheral queue management: freeze/thaw, sorted requeueing during
recovery, etc.
- Clean separation of peripherals, adapters, and adapter channels (no more
scsipi_link).
- Kernel thread for each scsipi_channel makes error recovery much easier
(no more dealing with interrupt context when recovering from an error).
- Mid-layer support for tagged queueing: commands can have the tag type
set explicitly, tag IDs are allocated in the mid-layer (thus eliminating
the need to use buggy tag ID allocation schemes in many adapter drivers).
- support for QUEUE FULL and CHECK CONDITION status in mid-layer; the command
will be requeued, or a REQUEST SENSE will be sent as appropriate.

Just before the merge syssrc has been tagged with thorpej_scsipi_beforemerge

branches: 1.13.6;
Add a "sc_rev" member to ncr5380_softc and handle CXD1180 quirk
in MI ncr5380sbc.

Fix pasto in previous.

Add a ncr5380_attach() routine which does part of the initialization, attaches
the scsibus, and does the addref/delref dance.

branches: 1.10.10;
vm_offset_t -> {paddr_t, vaddr_t}

Adapt to the new scsipi_adapter interface.

Move on-board I/O and NuBus drivers to their own directories
via repository copy, and make the necessary adjustments to reflect
the moved files.

Don't enable interrupts unless we are using reselect or interrupt-
driven PDMA modes.

branches: 1.6.2;
Remove advertising clause.

Merge scsipi branch in the mainline. This add support for ATAPI devices
(currently only CD-ROM drives on i386). The sys/dev/scsipi system provides 2
busses to which devices can attach (scsibus and atapibus). This needed to
change some include files and structure names in the low level scsi drivers.

Make #include directives consistent. All MD headers are of the form:

#include <mac68k/{dev,mac68k}/foo.h>

branches: 1.3.2; 1.3.4;
Always enable SCSI IRQ interrupt; the SBC_INTR flag now controls only
the SCSI DRQ interrupt, for "blind" transfers.

New ARP system, supports IPv4 over any hardware link.

Some of the stuff (e.g., rarpd, bootpd, dhcpd etc., libsa) still will
only support Ethernet. Tcpdump itself should be ok, but libpcap needs
lot of work.

For the detailed change history, look at the commit log entries for
the is-newarp branch.

branches: 1.1.2;
Split bus-dependent autoconfig code from the driver. This allows for
the future addition of a Duo Dock front end.

Unmap resources and print error messages properly in error paths.

KNF and misc style fixes.

For wdc_obio_match(), struct wdc_regs is too large for stack.
Use kmem_alloc(9) instead.

Frame size becomes:
3088 --> 0

move ata_queue_alloc(1) and ata_queue_free() calls to ata_channel_init()
and ata_channel_destroy() respectively, to make attachment code simpler,
and to make it easier to spot special queue manipulation like cmdide(4)

on topic of PR kern/52606

Merge support for SATA NCQ (Native Command Queueing) from jdolecek-ncq branch

ATA subsystem was changed to support several outstanding commands, and use
NCQ xfers if supported by both the controller and the disk, including NCQ
error recovery. Set NCQ high priority for BPRIO_TIMECRITICAL xfers
if supported. Added FUA support.

Done some work towards MP-safe, all ATA code tsleep()/wakeup() replaced
by condvars, and switched most code from spl* to mutexes (separate
wd(4) and ata channel lock).

Introduced new option WD_CHAOS_MONKEY to facilitate testing of error
handling, fixed several uncovered issues. Also fixed several problems
with kernel dump to wd(4) disk.

Tested with ahcisata(4), mvsata(4), siisata(4), piixide(4) on amd64,
with and without port multiplier, both disk and ATAPI devices; other
drivers and archs mechanically adjusted and compile-tested. NCQ is
supported for ahcisata(4) and siisata(4) for any controller, for
mvsata(4) only Gen IIe ones for now. Also enabled ATAPI support in
mvsata(4).

Thanks to Matt Thomas for initial ATA infrastructure patch, and
Jonathan A.Kollasch for siisata(4) NCQ changes and general testing.

Also fixes PR kern/43169 (wd(4)); and PR kern/11811, PR kern/47041,
PR kern/51979 (kernel dump)

branches: 1.27.18;
Simplify

branches: 1.26.2; 1.26.4;
Apply back changes that were reverted on Jul 24 and Jul 26 (general ata/wdc
cleanup and SATA PMP support), now that I'm back to fix the fallouts.

Revert, with intention of restoring in a less invasive way, the SATA Port
Multiplier code.

ok christos@

Add sata Port MultiPlier (PMP) support to the ata bus layer,
as described in
http://mail-index.netbsd.org/tech-kern/2012/06/23/msg013442.html
PMP support in integrated to the atabus layer.
struct ata_channel's ch_drive[] is not dynamically allocated, and ch_ndrive
(renamed to ch_ndrives) closely reflects the size of the ch_drive[] array.
Add helper functions atabus_alloc_drives() and atabus_free_drives()
to manage ch_drive[]/ch_ndrives.
Add wdc_maxdrives to struct wdc_softc so that bus front-end can specify
how much drive they really support (master/slave or single).
ata_reset_drive() callback gains a uint32_t *sigp argument which,
when not NULL, will contain the signature of the device being reset.
While there, some cosmetic changes:
- added a drive_type enum to ata_drive_datas, and stop encoding the
probed drive type in drive_flags (we were out of drive flags anyway).
- rename DRIVE_ATAPIST to DRIVE_ATAPIDSCW to better reflect what this
really is
- remove ata_channel->ata_drives, it's redundant with the pointer in
ata_drive_datas
- factor out the interpretation of SATA signatures in sata_interpet_sig()

propagate these changes to the ATA HBA drivers, and add support for PMP
to ahcisata(4) and siisata(4).

Thanks to:
- Protocase (http://www.protocase.com/) which provided a system
with lots of controllers, SATA PMP and drive slots
- Conservation Genomics Laboratory, Department of Biology, New Mexico State
University for hosting the above system
- Brook Milligan, who set up remote access and has been very responsive
when SATA cable move was needed

branches: 1.23.38;
Split device_t and softc for ATA devices, as well as wd(4). Other
cosmetic changes where appropriate.

branches: 1.22.28; 1.22.48; 1.22.52;
Don't call wdc_init_shadow_regs() before struct ata_channel is
properly initilized in wdc_obio_attach().
Fixes NULL pointer deref during boot.

branches: 1.21.8; 1.21.10;
Use device_cfdata().

branches: 1.20.2; 1.20.4; 1.20.6; 1.20.8; 1.20.10;
properly use ata_channel->ch_ndrive:
- initialize it properly in the bus front-ends (all 2, exept in wdc_pcmcia.c
for the "Sandisk CompactFlash Card" where it's set to 1)
- remplace hardcoded '2' by ata_channel->ch_ndrive in MI IDE drivers.

From Christos Zoulas in kern/32501.

branches: 1.19.2;
merge ktrace-lwp.

branches: 1.18.8; 1.18.10;
de-__P, remove register, ansify, b* -> mem*.

Move most of wdc_softc into a new atac_softc structure that contains
info common to all types of ATA controllers.

- Split the register handles out of struct wdc_channel into a separate
wdc_regs structure, and array of which (indexed per channel) is pointed
to by struct wdc_softc.
- Move the resulting wdc_channel structure to atavar.h and rename it to
ata_channel. Rename the corresponding flags.
- Add a "ch_ndrive" member to struct ata_channel, which indicates the
maximum number of drives that can be present on the channel. For now,
this is always 2. Add an ATA_MAXDRIVES constant that places an upper
limit on this value, also currently 2.

Add the notion of "shadow registers" to the wdc driver. These shadow
registers are registers that overlap with others on many controllers, but
which may actually be distinct on some controllers. Right now, the two
shadows are:

- wd_status (usually overlaps wd_command)
- wd_features (usually overlaps wd_error)

Add a new helper function, wdc_init_shadow_regs(), used to initialize
the shadow register handles on controllers where they do actually overlap.

Partially from Jordan Rhody @ Wasabi Systems, Inc.

Back out CVS fallout from last commit. Really make this build again.

Make these compile again after the latest adjustments.

More wdc_channel structure member namespace cleanup:
- channel -> ch_channel
- wdc -> ch_wdc

Rename "struct channel_softc" to "struct wdc_channel".

Rename:
- wdc_xfer to ata_xfer
- channel_queue to ata_queue
and move them to <dev/ata/atavar.h> so they can be used by non-wdc ATA
controllers. Clean up the member names of these structures while at it.

Simplify allocation of the channel queue.

Adapt to MI ATA/wdc changes. Especially, now that the address of
each individual ATA register is in the attachment structure, we
can dispense with the custom bus_space mapping hack which set the
stride, then unset it for particular bus_space functions. (There
is really no stride; the data register is read and written to
consecutive bytes. The control register mappings just happen to
be separated by four bytes.) While we're here, de-__P(), and lose
a confusing shift.

This has been tested on Quadra 630. Reviewed by bouyer.

Adapt for wdcattach() prototype change.

Hide the use of config_interrupts() in one place.

1) Use config_interrupts() to attach IDE and ATAPI drives. This eliminates
most polling.
2) Clean up some goofiness in pciide -- get rid of the whole "candisable" path
(it's gratuitous) and simplify the code by calling pciide_map_compat_intr(),
*_set_modes() and wdc_print_modes() from central locations.
3) Add a register writability and register ghost test to eliminate phantom
drives more quickly.

__KERNEL_RCSID()

branches: 1.3.6;
Use CFATTACH_DECL().

Declare all cfattach structures const.

branches: 1.1.6; 1.1.8;
Add IDE drive support.

Note:
(1) Character device major number chages to 49 from 48(in my original
code). So it is necessary to rebuild device files.
(2) Must use Booter 2.0.0a10 or later.
(3) Default mode is cpu busy wait. It is defined by flags 0x1000.
It will be more slow than before.
No flags means hardware interrupt mode. But it might be able to
get no interrupts.

Support machines:
(1) Quadra 630 series
(2) PowerBook 150

Non tested machine:
(1) PowerBook 190 series

Approved by: briggs