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Remove WX1820: never had the hardware, evaluation was paper-only

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flamingcow
2026-08-12 21:10:38 -07:00
parent b6e0fe8978
commit 1afe36a3c8
3 changed files with 1 additions and 7 deletions
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docs/README.md
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Per-device (each directory: device doc + its datasheets): Per-device (each directory: device doc + its datasheets):
- [nics/](nics/README.md) — the transport rule, the comparison table, and one directory per NIC: [x520](nics/x520/README.md), [connectx-5](nics/connectx-5/README.md), [x710](nics/x710/README.md), [e810](nics/e810/README.md), [wx1820](nics/wx1820/README.md). - [nics/](nics/README.md) — the transport rule, the comparison table, and one directory per NIC: [x520](nics/x520/README.md), [connectx-5](nics/connectx-5/README.md), [x710](nics/x710/README.md), [e810](nics/e810/README.md).
- [modules/](modules/README.md) — module inventory, media-lies table, the shared IEEE register set, RollBall protocol, cable-length physics, and one directory per module: [fs](modules/fs/README.md), [wiitek](modules/wiitek/README.md), [fibergaga](modules/fibergaga/README.md). - [modules/](modules/README.md) — module inventory, media-lies table, the shared IEEE register set, RollBall protocol, cable-length physics, and one directory per module: [fs](modules/fs/README.md), [wiitek](modules/wiitek/README.md), [fibergaga](modules/fibergaga/README.md).
docs/nics/README.md
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| [ConnectX-4/5 (mlx5)](connectx-5/README.md) | Firmware MCIA; writes allowed; framing open | **Yes** (CQE-stamps everything) | **The product candidate** — the only card meeting the full requirement set | | [ConnectX-4/5 (mlx5)](connectx-5/README.md) | Firmware MCIA; writes allowed; framing open | **Yes** (CQE-stamps everything) | **The product candidate** — the only card meeting the full requirement set |
| [X710 (i40e)](x710/README.md) | 1-byte-offset only | No | RollBall oracle path; PTP length-experiment platform | | [X710 (i40e)](x710/README.md) | 1-byte-offset only | No | RollBall oracle path; PTP length-experiment platform |
| [E810 (ice)](e810/README.md) | Multi-byte framing, writes EPERM-blocked | Yes | Dead for diagnostics writes | | [E810 (ice)](e810/README.md) | Multi-byte framing, writes EPERM-blocked | Yes | Dead for diagnostics writes |
| [WX1820 (txgbe)](wx1820/README.md) | Kernel `/dev/i2c-N` — ideal | No (PTP-only) | Disqualified |
Requirement weights behind the verdicts: all-packet hardware RX timestamps are non-negotiable (software stamping was tried, not precise enough), raw-L2 steering is not (encap acceptable) — [../open-questions.md](../open-questions.md) §1–2, §6. Requirement weights behind the verdicts: all-packet hardware RX timestamps are non-negotiable (software stamping was tried, not precise enough), raw-L2 steering is not (encap acceptable) — [../open-questions.md](../open-questions.md) §1–2, §6.
docs/nics/wx1820/README.md
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# Wangxun WX1820 (txgbe) — evaluated, disqualified
- Module I2C is architecturally ideal: kernel `sff`/phylink exposes `/dev/i2c-N` — arbitrary framing, zero patches.
- **Disqualified as product NIC**: PTP-only RX timestamping (verified in upstream `wx_ptp.c` — `HWTSTAMP_FILTER_ALL` falls to -ERANGE), the same limitation as the 82599 with a younger driver.
- Flow-steering/counter parity unverified.