cabletest docs
Project knowledge that moves and versions with the repo.
- goals.md — what cabletest is for and what it must output.
- state.md — where things are now: committed vs stashed, hardware in flight, bringup plan, open items.
- hardware.md — the box, interfaces, host tuning, how to run.
- transports.md — how to reach module-PHY diagnostics, why the NIC choice governs it, and the register-level protocols.
- modules.md — per-module diagnostics, register maps, cable-length physics, and the Marvell brick hazard.
- measurement.md — how to measure correctly; performance results and dead ends.
Vendor PDFs (BCM84891L transport + command handler, Marvell 88E151x datasheet) live alongside these.