QSFP Hardware Tests

Overview

QSFP hardware tests are a set of unit tests designed to verify the functionality of qsfp_service on a physical switch.

The QSFP hardware tests cover various aspects of the transceivers, including:

I2C Interface
- Read/Write stress test to known registers: This test verifies that the I2C interface can read and write data to specific registers on the QSFP transceiver.
Control Pins
- The control pins on the QSFP transceivers are used to manage their operation, including resetting the transceiver or putting it into a low-power state.
- The control pins test category includes:
  - Presence: This test ensures that the QSFP transceiver can be detected by qsfp_service.
  - Reset: Each test starts in cold-boot mode, asserting and de-asserting the reset pin of the transceiver to verify its functionality.
Transceiver Management
- The transceiver management test category includes:
  - Verifies application advertisements
  - Media interface detection
  - VDM (Versatile Data Management) capabilities advertisements
  - Transceiver datapath programming: These tests program the speed provided in the config and verifies that the datapath programming completes successfully.
  - CDB Firmware Upgrade

Platform Vendor: Should verify BSP (Board Support Package) kmods for the platform using the qsfp_hw_test.
Optics Vendor: Should verify the Transceiver Management Interface, I2C interface, and control pins to transceivers using the qsfp_hw_test.

BSP Kmods loaded
Switch cabled per QSFP/Link Test Topology guidelines
QSFP Test Config created per cabled topology
Compiled QSFP hardware tests
- Follow the instructions on the build page.
- When running the build step, you can pass this optional flag to save time: --cmake-target qsfp_hw_test

Refer to this documentation.