Rename min/max -> uimin/uimax for better honesty.

These functions are defined on unsigned int. The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.

HOWEVER! Some subsystems have

#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))

even though our standard name for that is MIN/MAX. Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.

To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.

I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:

cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))

It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.

Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate. But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all. (Who knows, maybe in some cases integer
truncation is actually intended!)

branches: 1.44.16;
KNF. Remove extra spaces. No functional change.

branches: 1.43.14;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.42.8; 1.42.18;
Cleanup includes. Switch from <machine/XXX.h> to <sys/XXX.h> from
bus, cpu, and intr. Remove unneeded includes.

branches: 1.41.4;
- Use lwp_getpcb() on VAX, clean from struct user usage.
- Include sys/user.h in MD proc.h .

Remove clause 3 and 4 from TNF licenses

branches: 1.39.2; 1.39.4;
Split device_t/softc for MI ncr53c9x and some related devices,
with various cleanup.

Rototill the vax code. Switch to devicet/PRIV_ALLOC. Cleanup vax autoconf
code. Move to prototype definitions. staticfy, constify, avoid casting.
Use device_* accessors.

Allow KA53 to link, from Hans Rosenfeld. clk_page is used only if VAX46, VAX48
or VAX49 are defined.

branches: 1.36.2; 1.36.6;
Reorganize a bit to be able to support multiple sgmaps.

branches: 1.35.20; 1.35.26;
Fix caddr_t fallout.

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

branches: 1.33.16;
Use the SI capitalization for "Hz", "kHz", and "MHz" in comments and strings.
Add a space between numbers and Hz unit.

branches: 1.32.4; 1.32.6; 1.32.8; 1.32.10;
merge ktrace-lwp.

branches: 1.31.10;
use the generated macros in locators.h rather than hard-coded numbers
to index the cf_loc[] array. reviewed by allen briggs.

Fetch SCSI controller ID from nvram for VS4k90 also.

branches: 1.29.2;
DMA, not dma nor Dma.

Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Declare all cfattach structures const.

increase sc_maxxfer from 63K to 64K. otherwise fsck fails for
file systems with larger block sizes.

branches: 1.24.2; 1.24.8; 1.24.18;
Add a VAXANY type. Eventually to used in INSTALL / GENERIC to easily
include support for all VAX platforms

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: 1.22.2;
Giant update from Michael Kukat (michael@unixiron.org).
Fixes support for:
MicroVAX 3100m90
MicroVAX 3100m95
VAX 4000/100 (tested)
VAX 4000/105A (tested)
VAX 4000/108
VAX 4000/400 (tested)
VAX 4000/500 (tested)
VAX 4000/600

branches: 1.21.2;
Commit changes to SCSI working on the VS4000/9x. "Don't overthink the
plumbing! Duh!".

Un __P.

More ELF changes (a.out still works).

branches: 1.18.2;
We use opt_cputype.h now.

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.

Adjust to new evcnt stuff.

Add extra argument to scb_vecalloc (a struct evcnt *)
Move ivec_dsp from trap.h to scb.h
Add interrupt counting to asc, le, ze, ncr, dz interrupts.
add common support for counting interrupts to cnm_idisp so
it can be done very efficiently.

branches: 1.14.2;
Add some debug stuff. Disable SCSI on KA49 for now until I can figure out
why it doesn't work.

Preliminary support for the VS4000/90 SGMAP. Needed for SCSI. Does not
quite work right yet.

be a bit more defensive in the probe routines. only allow one attachment.

Extend asc driver to include support for the VS400/9x.
Add VS4000/9x support vsbus_dma.c

Remove autconf stuff. not needed and wrong.

Fetch the SCSI ID out of NVRAM instead, if possible.

DEC have the internal SCSI controller as ID6, and CDROM as ID7.

Add fix for VS4000 SCSI hangs on disk writes. Add a VAX_BUS_DMA_SPILLPAGE
and use it in the asc_vsbus driver.

disable scsi for ka49 until sgmap is adapted to it.

Chnage chip freq to 25MHZ. panic if dmaaddr is not in the kernel's
address space. fix some printfs. (reads now work!)

it is pretty close to working. the scsibus probes now.

it's closer to working now.

expunge vm_offset_t and vm_size_t.
add bus_dma support for the vs4000 dma translation map (sgmap).
enhance the vsbus for the lance to work with it.
remove the sgmap init code from ka46/48/49.c

First pass at NCR53c9x attachment for VS4000. It doesn't work yet.
But I want to save the work.

KNF. Remove extra spaces. No functional change.

branches: 1.43.14;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.42.8; 1.42.18;
Cleanup includes. Switch from <machine/XXX.h> to <sys/XXX.h> from
bus, cpu, and intr. Remove unneeded includes.

branches: 1.41.4;
- Use lwp_getpcb() on VAX, clean from struct user usage.
- Include sys/user.h in MD proc.h .

Remove clause 3 and 4 from TNF licenses

branches: 1.39.2; 1.39.4;
Split device_t/softc for MI ncr53c9x and some related devices,
with various cleanup.

Rototill the vax code. Switch to devicet/PRIV_ALLOC. Cleanup vax autoconf
code. Move to prototype definitions. staticfy, constify, avoid casting.
Use device_* accessors.

Allow KA53 to link, from Hans Rosenfeld. clk_page is used only if VAX46, VAX48
or VAX49 are defined.

branches: 1.36.2; 1.36.6;
Reorganize a bit to be able to support multiple sgmaps.

branches: 1.35.20; 1.35.26;
Fix caddr_t fallout.

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

branches: 1.33.16;
Use the SI capitalization for "Hz", "kHz", and "MHz" in comments and strings.
Add a space between numbers and Hz unit.

branches: 1.32.4; 1.32.6; 1.32.8; 1.32.10;
merge ktrace-lwp.

branches: 1.31.10;
use the generated macros in locators.h rather than hard-coded numbers
to index the cf_loc[] array. reviewed by allen briggs.

Fetch SCSI controller ID from nvram for VS4k90 also.

branches: 1.29.2;
DMA, not dma nor Dma.

Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Declare all cfattach structures const.

increase sc_maxxfer from 63K to 64K. otherwise fsck fails for
file systems with larger block sizes.

branches: 1.24.2; 1.24.8; 1.24.18;
Add a VAXANY type. Eventually to used in INSTALL / GENERIC to easily
include support for all VAX platforms

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: 1.22.2;
Giant update from Michael Kukat (michael@unixiron.org).
Fixes support for:
MicroVAX 3100m90
MicroVAX 3100m95
VAX 4000/100 (tested)
VAX 4000/105A (tested)
VAX 4000/108
VAX 4000/400 (tested)
VAX 4000/500 (tested)
VAX 4000/600

branches: 1.21.2;
Commit changes to SCSI working on the VS4000/9x. "Don't overthink the
plumbing! Duh!".

Un __P.

More ELF changes (a.out still works).

branches: 1.18.2;
We use opt_cputype.h now.

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.

Adjust to new evcnt stuff.

Add extra argument to scb_vecalloc (a struct evcnt *)
Move ivec_dsp from trap.h to scb.h
Add interrupt counting to asc, le, ze, ncr, dz interrupts.
add common support for counting interrupts to cnm_idisp so
it can be done very efficiently.

branches: 1.14.2;
Add some debug stuff. Disable SCSI on KA49 for now until I can figure out
why it doesn't work.

Preliminary support for the VS4000/90 SGMAP. Needed for SCSI. Does not
quite work right yet.

be a bit more defensive in the probe routines. only allow one attachment.

Extend asc driver to include support for the VS400/9x.
Add VS4000/9x support vsbus_dma.c

Remove autconf stuff. not needed and wrong.

Fetch the SCSI ID out of NVRAM instead, if possible.

DEC have the internal SCSI controller as ID6, and CDROM as ID7.

Add fix for VS4000 SCSI hangs on disk writes. Add a VAX_BUS_DMA_SPILLPAGE
and use it in the asc_vsbus driver.

disable scsi for ka49 until sgmap is adapted to it.

Chnage chip freq to 25MHZ. panic if dmaaddr is not in the kernel's
address space. fix some printfs. (reads now work!)

it is pretty close to working. the scsibus probes now.

it's closer to working now.

expunge vm_offset_t and vm_size_t.
add bus_dma support for the vs4000 dma translation map (sgmap).
enhance the vsbus for the lance to work with it.
remove the sgmap init code from ka46/48/49.c

First pass at NCR53c9x attachment for VS4000. It doesn't work yet.
But I want to save the work.