sys: Remove $FreeBSD$: one-line .c comment pattern

Remove /^/[*/]\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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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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Use more standard types for manipulating pointers.

- Use a uintptr_t cast to get the virtual address of a pointer in
USB_P2U() instead of a ptrdiff_t.

- Add offsets to a char * pointer directly w

Use more standard types for manipulating pointers.

- Use a uintptr_t cast to get the virtual address of a pointer in
USB_P2U() instead of a ptrdiff_t.

- Add offsets to a char * pointer directly without roundtripping the
pointer through a ptrdiff_t in USB_ADD_BYTES().

Reviewed by: imp, hselasky
Obtained from: CheriBSD
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D27581

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usb: 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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Merge ^/head r305687 through r305890.

Improve USB polling mode by not locking any mutexes, asserting any
mutexes or using any callouts when active.

Trying to lock a mutex when KDB is active or the scheduler is stopped
can result in infi

Improve USB polling mode by not locking any mutexes, asserting any
mutexes or using any callouts when active.

Trying to lock a mutex when KDB is active or the scheduler is stopped
can result in infinite wait loops. The same goes for calling callout
related functions which in turn lock mutexes.

If the USB controller at which a USB keyboard is connected is idle
when KDB is entered, polling the USB keyboard via USB will always
succeed. Else polling may fail depending on which state the USB
subsystem and USB interrupt handler is in. This is unavoidable unless
KDB can wait for USB interrupt threads to complete before stalling the
CPU(s).

Tested by: Bruce Evans <bde@freebsd.org>
MFC after: 4 weeks

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Merge sync of head

Merge from HEAD

Merge ^/head r278005 through r278109.

Section 3.2.9 in the XHCI specification about control transfers says
that we should use a normal-TRB if there are more TRBs extending the
data-stage TRB. Add a dedicated state bit to the internal USB

Section 3.2.9 in the XHCI specification about control transfers says
that we should use a normal-TRB if there are more TRBs extending the
data-stage TRB. Add a dedicated state bit to the internal USB transfer
flags to handle this case.

Reported by: Kohji Okuno <okuno.kohji@jp.panasonic.com>
MFC after: 1 week

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Merge head from 7/28

MFC @ r266724

An SVM update will follow this.

IFC @266473

- Add softc pointer argument to FIFO functions as an optimisation.
- Implement support for interrupt filters in the DWC OTG driver, to
reduce the amount of CPU task switching when only feeding the FI

- Add softc pointer argument to FIFO functions as an optimisation.
- Implement support for interrupt filters in the DWC OTG driver, to
reduce the amount of CPU task switching when only feeding the FIFOs.
- Add common spinlock to the USB bus structure.

MFC after: 2 weeks

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Merge head

IFC @264767

Merge head up to r263906.

Workaround for USB MIDI adapters which use non-supported values of
wMaxPacketSize for BULK endpoints.

MFC after: 1 week

Merge fresh head.

IFC @247348.

Sync with HEAD.

Provide one global language string descriptor for
american english instead of giving each module its
own.

Submitted by: Christoph Mallon

MFC @ r241285

IFC @ r242684