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

2026-08-12 21:10:38 -07:00
parent b6e0fe8978
commit 1afe36a3c8
3 changed files with 1 additions and 7 deletions
@@ -16,6 +16,5 @@ Which card is where: [../state.md](../state.md).
 | [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 |
 | [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.
@@ -1,5 +0,0 @@
-# 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.