Revert r330897:

This was intended to be a non-functional change. It wasn't. The commit
message was thus wrong. In addition it broke arm, and merged crypto
related code.

Revert with prejudice.

This revert skips files touched in r316370 since that commit was since
MFCed. This revert also skips files that require $FreeBSD$ property
changes.

Thank you to those who helped me get out of this mess including but not
limited to gonzo, kevans, rgrimes.

Requested by: gjb (re)

Partial merge of the SPDX changes

These changes are incomplete but are making it difficult
to determine what other changes can/should be merged.

No objections from: pfg

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Improve portability #defines for compiling aicasm on other systems.

Submitted by: Robert Millan rmh debian.org
Obtained from: Debian GNU/kFreeBSD

Start each of the license/copyright comments with /*-, minor shuffle of lines

Update assembler syntax and assembler to allow generation of register
description tables used for diagnostic "pretty printing".

Silence GCC warnings about multi-line strings.

Sync Perforce IDs.

Add macro functionality.

Staticize and allow unique naming of data structures so that more
than on sequencer program can be statically compiled into the kernel
at a time.

Add support for parsing version strings out of assembler source files
and outputing them in generated files.

Fixed a few other scanner bugs that for some reason didn't show up until
these modifications were made.

MFC after: 10 days

Sync perforce IDs.

Add Perforce RCSIDs for easy revision correlation to my local tree.

Add support for constructing a table of critical section regions in
the firmware image. The kernel driver will soon have support for
single stepping the sequencer outside of a critical region prior
to starting exception handling.

Move aicasm to its own subdirectory.

o Convert to <inttypes.h> style fixed sized types to facilitate porting to
other systems.

o Normalize copyright text.

o Clean up probe code function interfaces by passing around a single
structure of common arguments instead of passing "too many" args
in each function call.

o Add support for the AAA-131 as a SCSI adapter.

o Add support for the AHA-4944 courtesy of "Matthew N. Dodd" <winter@jurai.net

o Correct manual termination support for PCI cards. The bit definitions
for manual termination control in the SEEPROM were incorrect.

o Add support for extracting NVRAM information from SCB 2 for BIOSen
that use this mechanism to pass this data to OS drivers.

o Properly set the STPWLEVEL bit in PCI config space based on the
setting in an SEEPROM.

o Go back to useing 32byte SCBs for all controllers. The current
firmware allows us to embed 12byte cdbs on all controllers in
a 32byte SCB, and larger cdbs are rarely used, so it is a
better use of this space to offer more SCBs (32).

o Add support for U160 transfers.

o Add an idle loop executed during data transfers that prefetches
S/G segments on controllers that have a secondary DMA engine
(aic789X).

o Improve the performance of reselections by avoiding an extra
one byte DMA in the case of an SCB lookup miss for the reselecting
target. We now keep a 16byte "untagged target" array on the card
for dealing with untagged reselections. If the controller has
external SCB ram and can support 64byte SCBs, then we use an
"untagged target/lun" array to maximize concurrency. Without
external SCB ram, the controller is limited to one untagged
transaction per target, auto-request sense operations excluded.

o Correct the setup of the STPWEN bit in SXFRCTL1. This control
line is tri-stated until set to one, so set it to one and then
set it to the desired value.

o Add tagged queuing support to our target role implementation.

o Handle the common cases of the ignore wide residue message
in firmware.

o Add preliminary support for 39bit addressing.

o Add support for assembling on big-endian machines. Big-endian
support is not complete in the driver.

o Correctly remove SCBs in the waiting for selection queue when
freezing a device queue.

o Now that we understand more about the autoflush bug on the
aic7890, only use the workaround on devices that need it.

o Add a workaround for the "aic7890 hangs the system when you
attempt to pause it" problem. We can now pause the aic7890
safely regardless of what instruction it is executing.

Back out the previous change to the queue(3) interface.
It was not discussed and should probably not happen.

Requested by: msmith and others

Change the way that the queue(3) structures are declared; don't assume that
the type argument to *_HEAD and *_ENTRY is a struct.

Suggested by: phk
Reviewed by: phk
Approved by: mdodd

Simplify my copyright license terms.

aic7xxx.c:
Add a function for sucking firmware out of the controller
prior to reset.

Remove some inline bloat from functions that should not have
been inlined.

During initialization, wait 1ms after the chip reset before
touching any registers. You can get machine checks on certain
architectures (Atari I think?) without the delay.

Return CAM_REQ_CMP for external BDR requests instead
of CAM_BDR_SENT.

Bump some messages to bootverbose levels above 1.

Don't clear any negotiated sync rate if the target rejects
a WDTR message. The sync rate is only cleared if the target
accepts a WDTR message.

Fix a small bug in the mesgin handling code that could cause
us to believe that we had recieved a message that was actually
received by another target. This could only confuse us in
some very rare transmission negotiation scenarios.

Remove some unecessary cleanup of residual information after
a residual is reported. The sequencer does this when the
command is queued now.

$Id$ -> $FreeBSD$

Massive overhaul of the aic7xxx driver:
- Convert to CAM
- Use a new DMA based queuing and paging scheme
- Add preliminary target mode support
- Add support for the aic789X chips
- Take advantage of external SRAM on more controllers.
- Numerous bug fixes and performance improvements.

Modify my copyright notice to allow the sequencer to be used with GPLed
software (aka Linux).

Fix a few bugs in the sequencer assembler.

Make it easy to compiler the assembler with debugging turned on.

Missed one.