3 Commits

Author	SHA1	Message	Date
Tony Cao	8dca6395d0	feat(rfm): add rfm-ring mode for one-shot PCIe ring-continuity check	2026-09-24 15:34:25 +08:00
Tony Cao	b92484a86c	rfm: multi-card --rfm-dev, ARM64 device-memory-safe bulk I/O, RT pinning, mailbox init ... - Rfm::open_path() for selecting /dev/rfm2gN on multi-card hosts (verified on D2000 dual PCI-5565: rfm2g0/rfm2g1) - dev_read/dev_write: aligned volatile word/byte loops for bulk payload access. memcpy/memset on non-cached (DEVICE_nGnRnE) mappings faults with SIGBUS on ARM64 - root cause of the ping crash, verified fixed - rfm_mode_main: RT-promote onto cfg.core (ping/echo spinning on the same core added ~0.5ms scheduling latency), clear REQ/REP mailbox headers at startup so stale data cannot poison first RTT samples - ping S-line: dseq (req-rep sequence lag) instrumentation - remove vendor/crc32fast/.gitignore from index	2026-09-21 19:02:20 +08:00
Tony Cao	e032f31392	feat(rfm): PCI-5565 reflective memory via VFIO/kernel-driver, ping/echo/bridge modes ... - src/rfm.rs: dual backend (rfm2g chardev /dev/rfm2g0 or vfio-pci BAR mmap), mailbox protocol (REQ@0x0/REP@0x1000, seq release/acquire) - --mode rfm-ping: periodic REQ write + spin-wait REP, same-clock RTT histogram - --mode rfm-echo: REQ->REP reflector; CX frames (>=280B) get f(x)=x*7+3 transform so PLC echo check passes through the RFM hop - --mode rfm-bridge: EL6695 RX -> RFM -> remote J1900 processing -> EL6695 TX with per-second bridge counters and rfm_hop_rtt stats (end-to-end CX->EL6695->D2000->RFM->x86 latency measurement) - OnlineStats: public mean() accessor	2026-09-20 13:03:16 +08:00