fix various typos in comments and log messages.

Merge thorpej-cfargs2.

branches: 1.39.8;
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: 1.38.10;
in many device attach paths, allocate memory with M_WAITOK instead of M_NOWAIT
and remove code to handle failures that can no longer happen.

branches: 1.37.18;
Fix device_t/softc split bug.

branches: 1.36.14;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.35.12; 1.35.22;
struct device * -> device_t, no functional changes intended.

struct cfdata * -> cfdata_t, no functional changes intended.

branches: 1.33.8;
Replace most gcc-specific __attribute__ uses with BSD-style sys/cdef.h
preprocessor macros.

branches: 1.32.2; 1.32.6;
Remove clause 3 and 4 from TNF licenses

branches: 1.31.2; 1.31.4;
use aprint_*_dev and device_xname

branches: 1.30.14;
Noisy printfs.

branches: 1.29.2;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.28.6; 1.28.8; 1.28.12;
- Merge changes from the vmlocking branch.
- Eliminate opt_i2o.h, since I2OVERBOSE is gone.

branches: 1.27.2; 1.27.4;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.26.2;
Replace some uses of lockmgr() / simplelocks.

__unused removal on arguments; approved by core.

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

branches: 1.23.8; 1.23.10;
Use device_private().

Use device_parent().

branches: 1.21.2; 1.21.4; 1.21.6; 1.21.8; 1.21.10;
Make almost everything #include <sys/bswap.h> instead of <machine/bswap.h>
The bswap.h and endian.h files are all rather incestuous, but I want to
get the constant folding stuff into one place - sys/bswap.h

branches: 1.20.2;
merge ktrace-lwp.

branches: 1.19.4;
nuke trailing whitespace

branches: 1.18.2; 1.18.10; 1.18.12;
Fix the way the scsipi adapter openings are adjusted when the array
controller adjusts our queue length.

- Handle DPT ioctls from native NetBSD binaries.
- SCSI targets could disapper mid-way through autoconfig if the board
notifed us of a changed LCT at the wrong time. Fix that.

Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Declare all cfattach structures const.

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

branches: 1.12.10;
Call malloc(9) with M_ZERO flag instead of memset() after malloc().

add RCSID

branches: 1.10.6;
Parameter group changes:

- Do FIELD_SET correctly for scalar types.
- Add some basic table ops.
- Push error reporting back into iop.c.
- Add some field index and (yet more) LAN defs to i2o.h.

Some changes from OpenBSD, and some of my own:

- More SCSI port defs.
- Nuke vtophys().
- Release resources in iop_init() upon failure.
- Don't use a message wrapper when initalising the outbound FIFO.
- A couple of field size/endian fixes.
- Just use iop_post() when we don't need special handling.
- IM_DISCARD is now pointless, since we don't queue at the driver level.
- Map data transfers from/to userspace directly.
- A few comment and stylistic changes.

branches: 1.8.2;
Make it compile with SCSIPI_DEBUG

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

- Allocate any private space that's requested.
- Fix a few bogons with the last update.
- Add some more LAN defs.

Major update; basically, improve performance somewhat and play nicer with
Intel and AMI IOPs. There still exists one nasty problem with Intel adapters
when under load, which I'm working on.

branches: 1.4.2;
FC peripherals on DPT/Adaptec boards only respond to private class messages.

- Only configure un-claimed devices. Implement re-configuration.
- Adhere to the spec better in some places. Also, work around some quirks
noted in the Linux I2O code.
- Register event handlers for the executive and RBS devices.
- Fix a number of buglets and tidy a little.
- Implement a message pass-through interface and some other useful ioctls.

branches: 1.2.2;
- A few minor changes (typos and the like).
- Use SPLs in iop_msg_send() and not the interrupt mask - it accesses
shared resources lower down.

Add support for I2O adapters and SCSI/FC-AL/BSA class devices. This needs
more testing with different configurations, and work in a number of areas
(which I'm not able to do for a little while), but is at least functional
and stable on i386 with DPT adapters.

Merge thorpej-cfargs2.

branches: 1.39.8;
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: 1.38.10;
in many device attach paths, allocate memory with M_WAITOK instead of M_NOWAIT
and remove code to handle failures that can no longer happen.

branches: 1.37.18;
Fix device_t/softc split bug.

branches: 1.36.14;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.35.12; 1.35.22;
struct device * -> device_t, no functional changes intended.

struct cfdata * -> cfdata_t, no functional changes intended.

branches: 1.33.8;
Replace most gcc-specific __attribute__ uses with BSD-style sys/cdef.h
preprocessor macros.

branches: 1.32.2; 1.32.6;
Remove clause 3 and 4 from TNF licenses

branches: 1.31.2; 1.31.4;
use aprint_*_dev and device_xname

branches: 1.30.14;
Noisy printfs.

branches: 1.29.2;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.28.6; 1.28.8; 1.28.12;
- Merge changes from the vmlocking branch.
- Eliminate opt_i2o.h, since I2OVERBOSE is gone.

branches: 1.27.2; 1.27.4;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.26.2;
Replace some uses of lockmgr() / simplelocks.

__unused removal on arguments; approved by core.

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

branches: 1.23.8; 1.23.10;
Use device_private().

Use device_parent().

branches: 1.21.2; 1.21.4; 1.21.6; 1.21.8; 1.21.10;
Make almost everything #include <sys/bswap.h> instead of <machine/bswap.h>
The bswap.h and endian.h files are all rather incestuous, but I want to
get the constant folding stuff into one place - sys/bswap.h

branches: 1.20.2;
merge ktrace-lwp.

branches: 1.19.4;
nuke trailing whitespace

branches: 1.18.2; 1.18.10; 1.18.12;
Fix the way the scsipi adapter openings are adjusted when the array
controller adjusts our queue length.

- Handle DPT ioctls from native NetBSD binaries.
- SCSI targets could disapper mid-way through autoconfig if the board
notifed us of a changed LCT at the wrong time. Fix that.

Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Declare all cfattach structures const.

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

branches: 1.12.10;
Call malloc(9) with M_ZERO flag instead of memset() after malloc().

add RCSID

branches: 1.10.6;
Parameter group changes:

- Do FIELD_SET correctly for scalar types.
- Add some basic table ops.
- Push error reporting back into iop.c.
- Add some field index and (yet more) LAN defs to i2o.h.

Some changes from OpenBSD, and some of my own:

- More SCSI port defs.
- Nuke vtophys().
- Release resources in iop_init() upon failure.
- Don't use a message wrapper when initalising the outbound FIFO.
- A couple of field size/endian fixes.
- Just use iop_post() when we don't need special handling.
- IM_DISCARD is now pointless, since we don't queue at the driver level.
- Map data transfers from/to userspace directly.
- A few comment and stylistic changes.

branches: 1.8.2;
Make it compile with SCSIPI_DEBUG

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

- Allocate any private space that's requested.
- Fix a few bogons with the last update.
- Add some more LAN defs.

Major update; basically, improve performance somewhat and play nicer with
Intel and AMI IOPs. There still exists one nasty problem with Intel adapters
when under load, which I'm working on.

branches: 1.4.2;
FC peripherals on DPT/Adaptec boards only respond to private class messages.

- Only configure un-claimed devices. Implement re-configuration.
- Adhere to the spec better in some places. Also, work around some quirks
noted in the Linux I2O code.
- Register event handlers for the executive and RBS devices.
- Fix a number of buglets and tidy a little.
- Implement a message pass-through interface and some other useful ioctls.

branches: 1.2.2;
- A few minor changes (typos and the like).
- Use SPLs in iop_msg_send() and not the interrupt mask - it accesses
shared resources lower down.

Add support for I2O adapters and SCSI/FC-AL/BSA class devices. This needs
more testing with different configurations, and work in a number of areas
(which I'm not able to do for a little while), but is at least functional
and stable on i386 with DPT adapters.

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: 1.38.10;
in many device attach paths, allocate memory with M_WAITOK instead of M_NOWAIT
and remove code to handle failures that can no longer happen.

branches: 1.37.18;
Fix device_t/softc split bug.

branches: 1.36.14;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.35.12; 1.35.22;
struct device * -> device_t, no functional changes intended.

struct cfdata * -> cfdata_t, no functional changes intended.

branches: 1.33.8;
Replace most gcc-specific __attribute__ uses with BSD-style sys/cdef.h
preprocessor macros.

branches: 1.32.2; 1.32.6;
Remove clause 3 and 4 from TNF licenses

branches: 1.31.2; 1.31.4;
use aprint_*_dev and device_xname

branches: 1.30.14;
Noisy printfs.

branches: 1.29.2;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.28.6; 1.28.8; 1.28.12;
- Merge changes from the vmlocking branch.
- Eliminate opt_i2o.h, since I2OVERBOSE is gone.

branches: 1.27.2; 1.27.4;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.26.2;
Replace some uses of lockmgr() / simplelocks.

__unused removal on arguments; approved by core.

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

branches: 1.23.8; 1.23.10;
Use device_private().

Use device_parent().

branches: 1.21.2; 1.21.4; 1.21.6; 1.21.8; 1.21.10;
Make almost everything #include <sys/bswap.h> instead of <machine/bswap.h>
The bswap.h and endian.h files are all rather incestuous, but I want to
get the constant folding stuff into one place - sys/bswap.h

branches: 1.20.2;
merge ktrace-lwp.

branches: 1.19.4;
nuke trailing whitespace

branches: 1.18.2; 1.18.10; 1.18.12;
Fix the way the scsipi adapter openings are adjusted when the array
controller adjusts our queue length.

- Handle DPT ioctls from native NetBSD binaries.
- SCSI targets could disapper mid-way through autoconfig if the board
notifed us of a changed LCT at the wrong time. Fix that.

Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Declare all cfattach structures const.

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

branches: 1.12.10;
Call malloc(9) with M_ZERO flag instead of memset() after malloc().

add RCSID

branches: 1.10.6;
Parameter group changes:

- Do FIELD_SET correctly for scalar types.
- Add some basic table ops.
- Push error reporting back into iop.c.
- Add some field index and (yet more) LAN defs to i2o.h.

Some changes from OpenBSD, and some of my own:

- More SCSI port defs.
- Nuke vtophys().
- Release resources in iop_init() upon failure.
- Don't use a message wrapper when initalising the outbound FIFO.
- A couple of field size/endian fixes.
- Just use iop_post() when we don't need special handling.
- IM_DISCARD is now pointless, since we don't queue at the driver level.
- Map data transfers from/to userspace directly.
- A few comment and stylistic changes.

branches: 1.8.2;
Make it compile with SCSIPI_DEBUG

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

- Allocate any private space that's requested.
- Fix a few bogons with the last update.
- Add some more LAN defs.

Major update; basically, improve performance somewhat and play nicer with
Intel and AMI IOPs. There still exists one nasty problem with Intel adapters
when under load, which I'm working on.

branches: 1.4.2;
FC peripherals on DPT/Adaptec boards only respond to private class messages.

- Only configure un-claimed devices. Implement re-configuration.
- Adhere to the spec better in some places. Also, work around some quirks
noted in the Linux I2O code.
- Register event handlers for the executive and RBS devices.
- Fix a number of buglets and tidy a little.
- Implement a message pass-through interface and some other useful ioctls.

branches: 1.2.2;
- A few minor changes (typos and the like).
- Use SPLs in iop_msg_send() and not the interrupt mask - it accesses
shared resources lower down.

Add support for I2O adapters and SCSI/FC-AL/BSA class devices. This needs
more testing with different configurations, and work in a number of areas
(which I'm not able to do for a little while), but is at least functional
and stable on i386 with DPT adapters.

in many device attach paths, allocate memory with M_WAITOK instead of M_NOWAIT
and remove code to handle failures that can no longer happen.

Fix device_t/softc split bug.

branches: 1.36.14;
split device_t/softc for all remaining drivers.
replace "struct device *" with "device_t".
use device_xname(), device_unit(), etc.

branches: 1.35.12; 1.35.22;
struct device * -> device_t, no functional changes intended.

struct cfdata * -> cfdata_t, no functional changes intended.

branches: 1.33.8;
Replace most gcc-specific __attribute__ uses with BSD-style sys/cdef.h
preprocessor macros.

branches: 1.32.2; 1.32.6;
Remove clause 3 and 4 from TNF licenses

branches: 1.31.2; 1.31.4;
use aprint_*_dev and device_xname

branches: 1.30.14;
Noisy printfs.

branches: 1.29.2;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.28.6; 1.28.8; 1.28.12;
- Merge changes from the vmlocking branch.
- Eliminate opt_i2o.h, since I2OVERBOSE is gone.

branches: 1.27.2; 1.27.4;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.26.2;
Replace some uses of lockmgr() / simplelocks.

__unused removal on arguments; approved by core.

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

branches: 1.23.8; 1.23.10;
Use device_private().

Use device_parent().

branches: 1.21.2; 1.21.4; 1.21.6; 1.21.8; 1.21.10;
Make almost everything #include <sys/bswap.h> instead of <machine/bswap.h>
The bswap.h and endian.h files are all rather incestuous, but I want to
get the constant folding stuff into one place - sys/bswap.h

branches: 1.20.2;
merge ktrace-lwp.

branches: 1.19.4;
nuke trailing whitespace

branches: 1.18.2; 1.18.10; 1.18.12;
Fix the way the scsipi adapter openings are adjusted when the array
controller adjusts our queue length.

- Handle DPT ioctls from native NetBSD binaries.
- SCSI targets could disapper mid-way through autoconfig if the board
notifed us of a changed LCT at the wrong time. Fix that.

Add trailing ; to CFATTACH_DECL.

Use CFATTACH_DECL().

Declare all cfattach structures const.

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

branches: 1.12.10;
Call malloc(9) with M_ZERO flag instead of memset() after malloc().

add RCSID

branches: 1.10.6;
Parameter group changes:

- Do FIELD_SET correctly for scalar types.
- Add some basic table ops.
- Push error reporting back into iop.c.
- Add some field index and (yet more) LAN defs to i2o.h.

Some changes from OpenBSD, and some of my own:

- More SCSI port defs.
- Nuke vtophys().
- Release resources in iop_init() upon failure.
- Don't use a message wrapper when initalising the outbound FIFO.
- A couple of field size/endian fixes.
- Just use iop_post() when we don't need special handling.
- IM_DISCARD is now pointless, since we don't queue at the driver level.
- Map data transfers from/to userspace directly.
- A few comment and stylistic changes.

branches: 1.8.2;
Make it compile with SCSIPI_DEBUG

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

- Allocate any private space that's requested.
- Fix a few bogons with the last update.
- Add some more LAN defs.

Major update; basically, improve performance somewhat and play nicer with
Intel and AMI IOPs. There still exists one nasty problem with Intel adapters
when under load, which I'm working on.

branches: 1.4.2;
FC peripherals on DPT/Adaptec boards only respond to private class messages.

- Only configure un-claimed devices. Implement re-configuration.
- Adhere to the spec better in some places. Also, work around some quirks
noted in the Linux I2O code.
- Register event handlers for the executive and RBS devices.
- Fix a number of buglets and tidy a little.
- Implement a message pass-through interface and some other useful ioctls.

branches: 1.2.2;
- A few minor changes (typos and the like).
- Use SPLs in iop_msg_send() and not the interrupt mask - it accesses
shared resources lower down.

Add support for I2O adapters and SCSI/FC-AL/BSA class devices. This needs
more testing with different configurations, and work in a number of areas
(which I'm not able to do for a little while), but is at least functional
and stable on i386 with DPT adapters.