v19.11.0

We are pleased to announce the release of TT System Firmware version 19.11.0 πŸ₯³πŸŽ‰.

General

  • Update to Zephyr 4.4.0 for Blackhole and Grendel

Blackhole

Firmware Init Error Reporting

  • The STATUS_ERROR_STATUS0 scratch register now reports SMC init failures as a bit field, with one bit per init stage. Bits accumulate, so a single read can indicate multiple failures.

    Bit

    Stage

    0

    Regulator init

    1

    Cable fault

    2

    Tensix init

    3

    MRISC load

    4

    GDDR training

    For example, 0b00000101 means both regulator init and Tensix init failed on this boot.

Persistent SPI Flash Parameters

  • Selected firmware table parameters can now be overridden at runtime via bh-mod, and the override persists across firmware upgrades.

    • REQUIRES tt-flash v3.8.0+ or else your configuration won’t persist across firmware upgrades. No other negative effects when using older tt-flash.

    • Only chip_limits.tdp_limit is exposed; additional parameters can be exposed in future releases as use cases arise.

PCIe

  • For P300C boards, update PCIe speed to Gen4 to improve QB2 PCIe stability (SYS-4229).

Ethernet

  • Updated Blackhole ERISC FW to v1.11.0

    • Keep all ETH interrupt modes DISABLED to avoid jumping into the IVT on RISC0 kernel switchover (tt-metal#44188)

    • Enable MACPCS ECC cabability

    • Added MACPCS/SerDes reset-deassert timestamps to boot results

    • ETH msg PORT_STATUS_CLEAR: clear accumulated live status counts in L1

GDDR

  • Update MRISC FW to 2.16

    • Parameter Sweeping

      • Enable parameter sweeping by configuring yaml file

      • A predetermined range of values for any cntrl cnfg reg can be swept

      • Eye height info is stored in the training struct

    • Updated CA ODT and vrefc per controller

    • Updated DRAM DFE for controller 4 to maximize eye height

    • Periodically exit powerdown when idle to allow temperature to update

Grendel

None.

Wormhole

None.

Migration guide

An overview of required and recommended changes to make when migrating from the previous v19.10.0 release can be found in 19.11 Migration Guide.

Full ChangeLog

The full ChangeLog from the previous v19.10.0 release can be found at the link below.

https://github.com/tenstorrent/tt-system-firmware/compare/v19.10.0…v19.11.0