| #
6464974c |
| 25-Apr-2026 |
Justin Hibbits <jhibbits@FreeBSD.org> |
dpaa: Enable checksum offloading for IPv4 and IPv6
Enable the FMan hardware parser to take advantage of some offloading.
This enables receive and transmit checksum offloading for both IPv4 and
IPv6.
dpaa: Enable checksum offloading for IPv4 and IPv6
Enable the FMan hardware parser to take advantage of some offloading.
This enables receive and transmit checksum offloading for both IPv4 and
IPv6.
Additional offloading capabilities the DPAA supports include:
* vlan parsing
* Transmit rate limiting
* IEEE-1588 timestamps
* Soft parsing for custom protocol checking
* Congestion handling
show more ...
|
| #
fd8d34ce |
| 24-Apr-2026 |
Justin Hibbits <jhibbits@FreeBSD.org> |
dpaa: Migrate from NCSW base to a home-grown driver
The NCSW reference base requires tuning for each target, and currently
is configured for FMANv2. This doesn't readily work on FMANv3 devices,
suc
dpaa: Migrate from NCSW base to a home-grown driver
The NCSW reference base requires tuning for each target, and currently
is configured for FMANv2. This doesn't readily work on FMANv3 devices,
such as the T-series powerpc, or the LS1043 ARM. Since Freescale/NXP
abandoned the NCSW driver a decade ago, it makes sense to abandon it
ourselves as well. This new driver uses a combination of the NCSW
driver and the Linux driver (BSD/GPL dual licensed) as a reference, but
contains no actual code from them.
The DPAA (Data Path Acceleration Architecture) subsystem consists of the
following components:
* BMan -- Buffer Manager. Manages buffer pools of different sizes (one
size per pool, up to 64 pools)
* QMan -- Queue Manager. Manages the interfaces between DPAA-based
components and the CPU(s).
* FMan -- Frame Manager. Responsible for all ethernet-related
processing. Consists itself of the following components:
* Ports -- interfaces to the QMan. An ethernet interface consists of
2 ports.
Ports use "Next-invoked action" (NIA) descriptors to form a pipeline
for processing on receive and transmit.
* Parser -- performs protocol header parsing and validation. Both
hardware and software parsers are available.
* KeyGen -- Key generator, used to start the classification process
(for the Policer), generating FQIDs and other keys based on the
frame input.
* Policer -- performs traffic shaping and classification
* MAC -- SoC specific ethernet MAC (dTSEC, TGEC, mEMAC). Currently
supports dTSEC and mEMAC, along with their MDIO blocks.
Additional components not yet handled:
SEC -- Security engine (crypto)
RE -- RAID engine
RapidIO
DCE -- Decompression/Compression engine, supports ZLIB, DEFLATE, and
GZIP, as well as base64 encoding and decoding.
BMan and QMan are accessed via cache-coherent portals, using ring
buffers as I/O. The intent is for portals to be per-CPU (core/thread)
to reduce locking contention and improve performance. This driver pins
interrupt handlers to the CPU "owning" a given portal, and uses critical
sections to prevent switching while accessing the portal.
show more ...
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