ena.4: optimize apropos and hardware

Remove "FreeBSD kernel driver for" and "family", and
add "AWS EC2" and "driver" to the document description
for better search discoveribility and consistency wit

ena.4: optimize apropos and hardware

Remove "FreeBSD kernel driver for" and "family", and
add "AWS EC2" and "driver" to the document description
for better search discoveribility and consistency with
other driver manuals.

Rewrite the introductory sentance to the HARDWARE section
with driver name for inclusion in hardware release notes.

MFC after: 3 days
Reviewed by: osamaabb
Sponsored by: Google
Sponsored by: Amazon

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ena: Support LLQ entry size recommendation from device

This commit adds support for receiving LLQ entry size recommendation
from the device. The driver will use the recommended entry size, unless
th

ena: Support LLQ entry size recommendation from device

This commit adds support for receiving LLQ entry size recommendation
from the device. The driver will use the recommended entry size, unless
the user specifically chooses to use regular or large LLQ entry.

Also added enum ena_llq_header_size_policy_t and llq_plociy field in
order to support the new feature.

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

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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Some of the files are using outdated linceses.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.

Remove $FreeBSD$: two-line nroff pattern

Remove /^\.\\"\n\.\\"\s*\$FreeBSD\$$\n/

ena: Switch driver owners from semihalf to amazon in man file

1. Update ena.4 manual file to include amazon owner emails.
2. State that the driver is developed by amazon but leave
that it was origin

ena: Switch driver owners from semihalf to amazon in man file

1. Update ena.4 manual file to include amazon owner emails.
2. State that the driver is developed by amazon but leave
that it was originally written by Semihalf, similarly to other
drivers in the /share/man/ directory of the FreeBSD source code.
3. Advance year in copyright notice to 2022.

MFC after: 2 weeks
Sponsored by: Amazon, Inc.

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ena: Remove TSO refs from the documentation

The Hardware currently doesn't support TSO feature and it can be
misleading to mention that in the docs.

All references to the docs were removed from the

ena: Remove TSO refs from the documentation

The Hardware currently doesn't support TSO feature and it can be
misleading to mention that in the docs.

All references to the docs were removed from the man pages.

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

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mdoc style: new sentence, new line.

ena: fix man page typos and update contact section

Verified spelling in the README and fixed the typos.

Also updated the contact section by removing Artur and adding Dawid
Gorecki who is now the se

ena: fix man page typos and update contact section

Verified spelling in the README and fixed the typos.

Also updated the contact section by removing Artur and adding Dawid
Gorecki who is now the second ENA FreeBSD driver developer.

Submitted by: Michal Krawczyk <mk@semihalf.com>
Obtained from: Semihalf
MFC after: 2 weeks
Sponsored by: Amazon, Inc.

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ena: merge ena-com v2.5.0 upgrade

Merge commit '2530eb1fa01bf28fbcfcdda58bd41e055dcb2e4a'

Adjust the driver to the upgraded ena-com part twofold:

First update is related to the driver's NUMA aware

ena: merge ena-com v2.5.0 upgrade

Merge commit '2530eb1fa01bf28fbcfcdda58bd41e055dcb2e4a'

Adjust the driver to the upgraded ena-com part twofold:

First update is related to the driver's NUMA awareness.

Allocate I/O queue memory in NUMA domain local to the CPU bound to the
given queue, improving data access time. Since this can result in
performance hit for unaware users, this is done only when RSS
option is enabled, for other cases the driver relies on kernel to
allocate memory by itself.

Information about first CPU bound is saved in adapter structure, so
the binding persists after bringing the interface down and up again.

If there are more buckets than interface queues, the driver will try to
bind different interfaces to different CPUs using round-robin algorithm
(but it will not bind queues to CPUs which do not have any RSS buckets
associated with them). This is done to better utilize hardware
resources by spreading the load.

Add (read-only) per-queue sysctls in order to provide the following
information:
- queueN.domain: NUMA domain associated with the queue
- queueN.cpu: CPU affinity of the queue

The second change is for the CSUM_OFFLOAD constant, as ENA platform
file has removed its definition. To align to that change, it has been
added to the ena_datapath.h file.

Submitted by: Artur Rojek <ar@semihalf.com>
Submitted by: Dawid Gorecki <dgr@semihalf.com>
Obtained from: Semihalf
MFC after: 2 weeks
Sponsored by: Amazon, Inc.

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ena: Implement full RSS reconfiguration

Bind RX/TX queues and MSI-X vectors to matching CPUs based on the RSS
bucket entries.

Introduce sysctls for the following RSS functionality:
- rss.indir_tabl

ena: Implement full RSS reconfiguration

Bind RX/TX queues and MSI-X vectors to matching CPUs based on the RSS
bucket entries.

Introduce sysctls for the following RSS functionality:
- rss.indir_table: indirection table mapping
- rss.indir_table_size: indirection table size
- rss.key: RSS hash key (if Toeplitz used)

Said sysctls are only available when compiled without `option RSS`, as
kernel-side RSS support currently doesn't offer RSS reconfiguration.

Migrate the hash algorithm from CRC32 to Toeplitz and change the initial
hash value to 0x0 in order to match the standard Toeplitz implementation.
Provide helpers for hash key inversion required for HW operations.

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

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Update ENA driver man page

Bring the obsolete man page up to date:
* update diagnostic error messages
* add documentation of loader tunables
* document netmap support
* add a driver history section

Update ENA driver man page

Bring the obsolete man page up to date:
* update diagnostic error messages
* add documentation of loader tunables
* document netmap support
* add a driver history section
* update the contact information

Submitted by: Artur Rojek <ar@semihalf.com>
Submitted by: Michal Krawczyk <mk@semihalf.com>
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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Fix a bunch of mdoc issues found by mandoc -Tlint.

MFHead @348740

Sponsored by: The FreeBSD Foundation

Fix ENA manual issues

The issues were pointed in community review:
https://reviews.freebsd.org/D10427#inline-67587

Also, fix other issues found by the igor tool.

Submitted by: Michal Krawczyk <mk

Fix ENA manual issues

The issues were pointed in community review:
https://reviews.freebsd.org/D10427#inline-67587

Also, fix other issues found by the igor tool.

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

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MFhead@r344527

Merge ^/head r344178 through r344512.

Fix a slew of mdoc errors and warnings.

MFC after: 1 week

Merge ^/head r322398 through r322746.

MFhead@r322698

ena.4: fix spelling of 'occurred'

PR: 331298
Submitted by: Fabian Keil
Obtained from: ElectroBSD
MFC after: 1 week

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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