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Jumbo in the size mix (MTU 9000 + module jumbo pinned), check-first module config trusting GET reads, cable diag async at startup through the reset path, MODULES table dissolved into SETTINGS/LINKS, per-driver NIC counter sets, comment cleanup

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flamingcow
2026-08-13 08:04:26 -07:00
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docs/modules/fs/README.md
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@@ -37,18 +37,19 @@ Protocol and full verified catalog: [bcm84891l-mdio-commands.md](bcm84891l-mdio-
| Item | Command | State |
|---|---|---|
| EEE / AutogrEEEn | 0x8008/0x8009 | Once read 0x0047 (10G AutogrEEEn variable latency + 5G/1G native — local-only, invisible in IEEE 7.60/7.61, which read 0); later reads 0. **Forced all-off** via SET with explicit params `(0, 0, 0x7A12, 0x480, 0)` + AN restart, verified. cabletest applies this defensively at every bringup and verifies 7.60 reads 0 after relink (`phy.go`) |
| EEE / AutogrEEEn | 0x8008/0x8009 | Once read 0x0047 (10G AutogrEEEn variable latency + 5G/1G native — local-only, invisible in IEEE 7.60/7.61, which read 0); later reads 0, treated as the truth. **Forced all-off** via SET with explicit params `(0, 0, 0x7A12, 0x480, 0)` + AN restart, verified. cabletest checks 0x8008 and forces only on mismatch, verifying 7.60 reads 0 either way (`phy.go`) |
| EEE wire-truth | arm 0x801A after link-up, read 0x801B | Zero LPI events/duration on idle link; repeat under traffic |
| Fast retrain | 0x800A (datasheet titles it EMI_MODE; description is fast retrain) | Enabled 10G/5G/2.5G; IEEE 1.147 = 0x0019, count bits zero. Keep enabled; read the 1.147 count per run — a marginal cable that fast-retrains still gets counted |
| Pair map | 0x8000 | DATA2 = 0x00E4 = identity (A/B/C/D straight through) — MDI wiring verification works |
| Fault pass-through | 0x800D | 0 = LF/RF pass to the line (0x8011/0x8010 could mask them as IDLE — leave off) |
| Host interface | 0x802B/0x802D/0x8027 | XFI polarity normal; TX FIR = main tap 0x3C only; MAC/PHY frequency locked; KR/SyncE/USXGMII/WOL disabled; jumbo on at 9K; temp warnings off |
| Host interface | 0x802B/0x802D/0x8027 | XFI polarity normal; TX FIR = main tap 0x3C only; MAC/PHY frequency locked; KR/SyncE/USXGMII/WOL disabled; temp warnings off |
| Jumbo | 0x801C/0x801D | cabletest checks 0x801D and forces enable on mismatch (`phy.go`). The ODM firmware reads back the 9K size option regardless of the requested 10K — and 9018-byte wire frames pass at line rate with zero loss/corrupt, so its "9K" covers ≥ 9018 in practice |
| 1588 | 0x8004 | Disabled (engine registers undocumented — see asks below) |
| Limited reach | 0x8006 | Disabled — its DATA3 "linked in LR mode" bit, the only handler-visible trace of the DSP length estimate, is unavailable without a config change |
## Firmware-reliability caveat
## Firmware-reliability notes
Several documented DATA1 returns on this ODM firmware are untrustworthy: die-temperature-like values (0x43/0x44/0x46/0x47) appear in DATA1 of commands that should return modes, and repeat reads of the same GET disagree. Corroborate anything load-bearing through IEEE registers (7.60/7.61 for EEE advertisement) or wire behavior (EEE statistics under traffic), and write every DATA register explicitly before any SET.
GET returns are trusted: early exploration saw one anomalous DATA1 (0x0047 from the EEE GET, never reproduced) and die-temperature-like values in other commands' DATA1, treated as one-off noise. cabletest reads config before forcing it and corroborates EEE through 7.60 after any relink. The hard rule that stands: write every DATA register explicitly before any SET — the handler executes stale DATA.
## ECD — recovered from the OpenBCM SDK, proven on hardware