ciss: Add max physical target

Add support for tracking the maximum physical target and using that to
override the maximum logical target.

PR: 246279
Reviewed by: imp
Tested by: Marek Zarychta
Diffe

ciss: Add max physical target

Add support for tracking the maximum physical target and using that to
override the maximum logical target.

PR: 246279
Reviewed by: imp
Tested by: Marek Zarychta
Differential Revision: https://reviews.freebsd.org/D25155

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ciss: Minor formatting nit.

PR: 246279
Reviewed by: imp
Tested by: Marek Zarychta
Differential Revision: https://reviews.freebsd.org/D25155

sys: Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

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ciss: clean up empty lines in .c and .h files

sys/dev: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error

sys/dev: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

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sys/dev: minor spelling fixes.

Most affect comments, very few have user-visible effects.

Merge sync of head

MFhead @ r277403

Reintegrate head: r274132-r277384

Sponsored by: The FreeBSD Foundation

Reintegrate head revisions r273096-r277147

Sponsored by: The FreeBSD Foundation

Remove compat shims for FreeBSD versions older than 6 (really early 5).
The only diffs in the disassembly were different line numbers passed to
lock functions.

Merge fresh head.

sync from head

IFC @247348.

Reform the busdma API so that new types may be added without modifying
every architecture's busdma_machdep.c. It is done by unifying the
bus_dmamap_load_buffer() routines so that they may be called

Reform the busdma API so that new types may be added without modifying
every architecture's busdma_machdep.c. It is done by unifying the
bus_dmamap_load_buffer() routines so that they may be called from MI
code. The MD busdma is then given a chance to do any final processing
in the complete() callback.

The cam changes unify the bus_dmamap_load* handling in cam drivers.

The arm and mips implementations are updated to track virtual
addresses for sync(). Previously this was done in a type specific
way. Now it is done in a generic way by recording the list of
virtuals in the map.

Submitted by: jeff (sponsored by EMC/Isilon)
Reviewed by: kan (previous version), scottl,
mjacob (isp(4), no objections for target mode changes)
Discussed with: ian (arm changes)
Tested by: marius (sparc64), mips (jmallet), isci(4) on x86 (jharris),
amd64 (Fabian Keil <freebsd-listen@fabiankeil.de>)

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Sync with HEAD.

IFC @ r245509

Satisfy the intent of kern/151564: [ciss] ciss(4) should increase
CISS_MAX_LOGICAL to 107

Submitter wanted to increase the number of logical disks supported by ciss(4)
by simply raising the CISS_MAX

Satisfy the intent of kern/151564: [ciss] ciss(4) should increase
CISS_MAX_LOGICAL to 107

Submitter wanted to increase the number of logical disks supported by ciss(4)
by simply raising the CISS_MAX_LOGICAL value even higher. Instead, consult
the documentation for the raid controller (OPENCISS) and poke the controller
bits to ask it for how many logical/physical disks it can handle.

Revert svn R242089 that raised CISS_MAX_LOGICAL to 64 for all controllers.

For older controllers that don't support this mechanism, fallback to the old
value of 16 logical disks. Tested on P420, P410, P400 and 6i model ciss(4)
controllers.

This should will be MFC'd back to stable/9 stable/8 and stable/7 after the MFC
period.

PR: kern/151564
Reviewed by: scottl@freebsd.org
MFC after: 2 weeks

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MFC

IFC @ r242684

Sync from head

Increase the driver-side limit on the number of logical volumes that
the driver will recognize. I've tested this as far as 25 volumes.

Update to current version of head.

MFC r204648:
Several changes to fix livelock under high load, introduced by r203489:
- change the way in which command queue overflow is handled;
- do not expose to CAM two command slots, used for

MFC r204648:
Several changes to fix livelock under high load, introduced by r203489:
- change the way in which command queue overflow is handled;
- do not expose to CAM two command slots, used for driver's internal purposes;
- allow driver to use up to 1024 command slots, instead of 256 before.

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