ena: Update license signatures to 2024

This commit updates all the license signatures to 2024.

Approved by: cperciva (mentor)
MFC after: 2 weeks
Sponsored by: Amazon, Inc.

ena: Update the license dating to 2023

Some of the files are using outdated linceses.
Update the license to be 2023.

Approved by: cperciva (mentor)
MFC after: 2 weeks
Sponsored by: Amazon, Inc.

sys: Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

ena: Move RSS logic into its own source files

Delegate RSS related functionality into separate .c/.h files in
preparation for the full RSS support.

While at it, reorder functions and remove prototy

ena: Move RSS logic into its own source files

Delegate RSS related functionality into separate .c/.h files in
preparation for the full RSS support.

While at it, reorder functions and remove prototypes for ones with
internal linkage.

Obtained from: Semihalf
MFC after: 2 weeks
Sponsored by: Amazon, Inc.

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Add SPDX license tag to the ENA driver files

Refering to guide: https://wiki.freebsd.org/SPDX the SPDX tag should not
replace the standard license text, however it should be added over the
standard

Add SPDX license tag to the ENA driver files

Refering to guide: https://wiki.freebsd.org/SPDX the SPDX tag should not
replace the standard license text, however it should be added over the
standard license text to make the automation easier.

Because of that, the old license was kept, but the SPDX tag was added
on top of every ENA driver file.

Submited by: Michal Krawczyk <mk@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D27117

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ena: fix module build after r362530

Somehow I missed the makefile when moving the change from phabricator to
svn.

MFC after: 1 week
X-MFC with: r362530

Introduce NETMAP support in ENA

Mock implementation of NETMAP routines is located in ena_netmap.c/.h
files. All code is protected under the DEV_NETMAP macro. Makefile was
updated with files and flag

Introduce NETMAP support in ENA

Mock implementation of NETMAP routines is located in ena_netmap.c/.h
files. All code is protected under the DEV_NETMAP macro. Makefile was
updated with files and flag.

As ENA driver provide own implementations of (un)likely it must be
undefined before including NETMAP headers.

ena_netmap_attach function is called on the end of NIC attach. It fills
structure with NIC configuration and callbacks. Then provides it to
netmap_attach. Similarly netmap_detach is called during ena_detach.

Three callbacks are used.
nm_register is implemented by ena_netmap_reg. It is called when user
space application open or close NIC in NETMAP mode. Current action is
recognized based on onoff parameter: true means on and false off. As
NICs rings need to be reconfigured ena_down and ena_up are reused.
When user space application wants to receive new packets from NIC
nm_rxsync is called, and when there are new packets ready for Tx
nm_txsync is called.

Differential Revision: https://reviews.freebsd.org/D21934
Submitted by: Rafal Kozik <rk@semihalf.com>
Michal Krawczyk <mk@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.

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Split Rx/Tx from initialization code in ENA driver

Move Rx/Tx routines to separate file.
Some functions:
* ena_restore_device,
* ena_destroy_device,
* ena_up,
* ena_down,
* ena_refill_rx_bufs
could

Split Rx/Tx from initialization code in ENA driver

Move Rx/Tx routines to separate file.
Some functions:
* ena_restore_device,
* ena_destroy_device,
* ena_up,
* ena_down,
* ena_refill_rx_bufs
could be reused in upcoming netmap code in the driver. To make it
possible, they were moved to ena.h header.

Differential Revision: https://reviews.freebsd.org/D21933
Submitted by: Rafal Kozik <rk@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.

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MFHead @348740

Sponsored by: The FreeBSD Foundation

Update ENA version to v2.0.0

ENAv2 introduces many new features, bug fixes and improvements.

Main new features are LLQ (Low Latency Queues) and independent queues
reconfiguration using sysctl comma

Update ENA version to v2.0.0

ENAv2 introduces many new features, bug fixes and improvements.

Main new features are LLQ (Low Latency Queues) and independent queues
reconfiguration using sysctl commands.

The year in copyright notice was updated to 2019.

Submitted by: Michal Krawczyk <mk@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.

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Merge ^/head r318560 through r318657.

Add support for Amazon Elastic Network Adapter (ENA) NIC

ENA is a networking interface designed to make good use of modern CPU
features and system architectures.

The ENA device exposes a lightweigh

Add support for Amazon Elastic Network Adapter (ENA) NIC

ENA is a networking interface designed to make good use of modern CPU
features and system architectures.

The ENA device exposes a lightweight management interface with a
minimal set of memory mapped registers and extendable command set
through an Admin Queue.

The driver supports a range of ENA devices, is link-speed independent
(i.e., the same driver is used for 10GbE, 25GbE, 40GbE, etc.), and has
a negotiated and extendable feature set.

Some ENA devices support SR-IOV. This driver is used for both the
SR-IOV Physical Function (PF) and Virtual Function (VF) devices.

ENA devices enable high speed and low overhead network traffic
processing by providing multiple Tx/Rx queue pairs (the maximum number
is advertised by the device via the Admin Queue), a dedicated MSI-X
interrupt vector per Tx/Rx queue pair, and CPU cacheline optimized
data placement.

The ENA driver supports industry standard TCP/IP offload features such
as checksum offload and TCP transmit segmentation offload (TSO).
Receive-side scaling (RSS) is supported for multi-core scaling.

The ENA driver and its corresponding devices implement health
monitoring mechanisms such as watchdog, enabling the device and driver
to recover in a manner transparent to the application, as well as
debug logs.

Some of the ENA devices support a working mode called Low-latency
Queue (LLQ), which saves several more microseconds. This feature will
be implemented for driver in future releases.

Submitted by: Michal Krawczyk <mk@semihalf.com>
Jakub Palider <jpa@semihalf.com>
Jan Medala <jan@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon.com Inc.
Differential revision: https://reviews.freebsd.org/D10427

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