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

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

mlx5ib: idiomatic use of preprocessor, in particular paths

MFC after: 1 week
Sponsored by: NVIDIA Networking

mlx5ib: normalize use of the opt_*.h files

MFC after: 1 week
Sponsored by: NVIDIA Networking

mlx5ib: Implement support for enabling and disabling RoCE ECN.

RoCE is short for Remote direct memory access over Converged Ethernet.
ECN is short for Explicit Congestion Notification.

MFC after: 1

mlx5ib: Implement support for enabling and disabling RoCE ECN.

RoCE is short for Remote direct memory access over Converged Ethernet.
ECN is short for Explicit Congestion Notification.

MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking

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Merge ^/head r358269 through r358399.

Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many)

r357614 added CTLFLAG_NEEDGIANT to make it easier to find nodes that are
still not MPSAFE (or already are but aren’t properly mark

Mark more nodes as CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT (17 of many)

r357614 added CTLFLAG_NEEDGIANT to make it easier to find nodes that are
still not MPSAFE (or already are but aren’t properly marked).
Use it in preparation for a general review of all nodes.

This is non-functional change that adds annotations to SYSCTL_NODE and
SYSCTL_PROC nodes using one of the soon-to-be-required flags.

Mark all obvious cases as MPSAFE. All entries that haven't been marked
as MPSAFE before are by default marked as NEEDGIANT

Approved by: kib (mentor, blanket)
Commented by: kib, gallatin, melifaro
Differential Revision: https://reviews.freebsd.org/D23718

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Merge r358179 through r358238.

PR: 244251

Fix broken MLX5_IB_INDEX() macro in mlx5ib(4).

The index should be computed as distance from arg[0] and not
the beginning of struct mlx5_ib_congestion .

While at it fix a use of zero length array t

Fix broken MLX5_IB_INDEX() macro in mlx5ib(4).

The index should be computed as distance from arg[0] and not
the beginning of struct mlx5_ib_congestion .

While at it fix a use of zero length array to avoid depending
on undefined compiler behaviour.

MFC after: 1 week
Sponsored by: Mellanox Technologies

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Merge ^/head r340918 through r341763.

mlx5ib: Make sure the congestion work timer does not escape the drain procedure.

If the mlx5_ib_read_cong_stats() function was running when mlx5ib was unloaded,
because this function unconditionally

mlx5ib: Make sure the congestion work timer does not escape the drain procedure.

If the mlx5_ib_read_cong_stats() function was running when mlx5ib was unloaded,
because this function unconditionally restarts the timer, the timer can still
be pending after the delayed work has been cancelled. To fix this simply loop
on the delayed work cancel procedure as long as it returns non-zero.

Submitted by: hselasky@
Approved by: hselasky (mentor)
MFC after: 1 week
Sponsored by: Mellanox Technologies

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Add support for explicit congestion notification, ECN, to mlx5ib(4).

ECN configuration and statistics is available through a set of sysctl(8)
nodes under sys.class.infiniband.mlx5_X.cong . The ECN c

Add support for explicit congestion notification, ECN, to mlx5ib(4).

ECN configuration and statistics is available through a set of sysctl(8)
nodes under sys.class.infiniband.mlx5_X.cong . The ECN configuration
nodes can also be used as loader tunables.

MFC after: 1 week
Sponsored by: Mellanox Technologies

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