busdma: tidy bus_dma_run_filter() functions

After removing filter functionality, the naming doesn't clearly
represent what the function does, so try to address this. Include some
code clarity and st

busdma: tidy bus_dma_run_filter() functions

After removing filter functionality, the naming doesn't clearly
represent what the function does, so try to address this. Include some
code clarity and style improvements.

Create a common version in subr_busdma_bounce.c, used by most
implementations. powerpc still needs its own version of the function,
due to its dmat->iommu == NULL check.

No functional change intended.

Reviewed by: jhb
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D42896

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busdma: remove parent tag tracking

Without filter functions, we do not need to keep track of tag ancestry.
All inheritance of the parent tag's parameters occurs when creating the
new child tag.

Rev

busdma: remove parent tag tracking

Without filter functions, we do not need to keep track of tag ancestry.
All inheritance of the parent tag's parameters occurs when creating the
new child tag.

Reviewed by: jhb
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D42895

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busdma: kill filter functionality internally

Address filter functions are unused, unsupported, and now rejected.
Simplify some busdma code by removing filter functionality completely.

Note that the

busdma: kill filter functionality internally

Address filter functions are unused, unsupported, and now rejected.
Simplify some busdma code by removing filter functionality completely.

Note that the chains of parent tags become useless, and will be cleaned
up in the next commit.

No functional change intended.

Reviewed by: jhb
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D42894

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

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

bus_dma: Deduplicate locking helper functions.

- Move busdma_lock_mutex to subr_bus_dma.c.

- Move _busdma_lock_dflt to subr_bus_dma.c. This function was named a
couple of different things previo

bus_dma: Deduplicate locking helper functions.

- Move busdma_lock_mutex to subr_bus_dma.c.

- Move _busdma_lock_dflt to subr_bus_dma.c. This function was named a
couple of different things previously. It is not a public API but
an internal helper used in place of a NULL pointer. The prototype
is in <sys/bus_dma.h> as not all backends include
<sys/bus_dma_internal.h>.

Reviewed by: kib
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D33694

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Remove "All Rights Reserved" from FreeBSD Foundation sys/ copyrights

These ones were unambiguous cases where the Foundation was the only
listed copyright holder (in the associated license block).

S

Remove "All Rights Reserved" from FreeBSD Foundation sys/ copyrights

These ones were unambiguous cases where the Foundation was the only
listed copyright holder (in the associated license block).

Sponsored by: The FreeBSD Foundation

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MFHead @347527

Sponsored by: The FreeBSD Foundation

Provide a template for busdma code for RISC-V.

RISC-V ISA specifies no cache management instructions so leave cache
operations in cpufunc.h as no-op for now.

Note some new hardware comes with their

Provide a template for busdma code for RISC-V.

RISC-V ISA specifies no cache management instructions so leave cache
operations in cpufunc.h as no-op for now.

Note some new hardware comes with their own memory-mapped cache
management controller.

Tested on HiFive Unleashed board with cgem(4).

Reviewed by: markj
Obtained from: arm64
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D20126

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