[v3,0/2] PCI: dw-rockchip: hide broken ATS cap in EP-mode

Message

Niklas Cassel March 10, 2025, 9:48 a.m. UTC

Hello there,

Address Translation Services (ATS) is broken on rk3588 when running the
PCIe controller in Endpoint Mode.

This causes IOTLB invalidation timeout errors on the host side when using
and rk3588 in Endpoint Mode, and you are unable to run pci_endpoint_test.

Solve this by hiding the ATS capability.
With this, we do not get any IOTLB invalidation timeouts, and we can run
pci_endpoint_test successfully.


Changes since v2:
-Added missing EXPORT_SYMBOL_GPL().


Niklas Cassel (2):
  PCI: dwc: ep: Add dw_pcie_ep_hide_ext_capability()
  PCI: dw-rockchip: Hide broken ATS capability

 .../pci/controller/dwc/pcie-designware-ep.c   | 39 +++++++++++++++++++
 drivers/pci/controller/dwc/pcie-designware.h  |  7 ++++
 drivers/pci/controller/dwc/pcie-dw-rockchip.c | 27 +++++++++++++
 3 files changed, 73 insertions(+)

Comments

Krzysztof Wilczyński March 11, 2025, 5:39 p.m. UTC | #1

Hello,

> Hello there,
> 
> Address Translation Services (ATS) is broken on rk3588 when running the
> PCIe controller in Endpoint Mode.
> 
> This causes IOTLB invalidation timeout errors on the host side when using
> and rk3588 in Endpoint Mode, and you are unable to run pci_endpoint_test.
> 
> Solve this by hiding the ATS capability.
> With this, we do not get any IOTLB invalidation timeouts, and we can run
> pci_endpoint_test successfully.

Applied to controller/dwc, thank you!

	Krzysztof