FreeBSD source tree https://cgit-dev.freebsd.org/src/atom?h=main 2026-05-04T01:47:54Z 2026-05-04T01:47:54Z Justin Hibbits jhibbits@FreeBSD.org 2026-05-04T01:43:44Z urn:sha1:7a40b8a89e7da2a7e8d8e132bc37885b22e9bfb1 Reported by: ziaee@ Fixes: fd8d34ce27 ("dpaa: Migrate from NCSW base to a home-grown driver") 2026-05-03T19:09:29Z Justin Hibbits jhibbits@FreeBSD.org 2026-04-24T03:38:19Z urn:sha1:fd8d34ce272ba40f3e0218198ba542a29c390a4a 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.