linux-kernel - [PATCH v1 0/2] PCI: dwc: Add support for 64-bit MSI target addresses

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Date:   Tue,  9 Aug 2022 18:00:48 +0000
From:   Will McVicker <willmcvicker@...gle.com>
To:     Jingoo Han <jingoohan1@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Rob Herring <robh@...nel.org>,
        "Krzysztof Wilczyński" <kw@...ux.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Will McVicker <willmcvicker@...gle.com>
Cc:     kernel-team@...roid.com, Vidya Sagar <vidyas@...dia.com>,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1 0/2] PCI: dwc: Add support for 64-bit MSI target addresses

Hi,

I have two patches that address a couple of issues I've run into with the
PCIe DWC host driver:
  (1) the host driver fails to probe when ZONE_DMA32 is disabled.
  (2) the host driver will fail to probe if a 32-bit address is not
      available even on devices that support 64-bit target addresses.

I have addressed both of these issues with the two patches (details can
found in each of the patch commit messages). Please take a look and let
me know your thoughts.

With regards to testing, I have verified them on Android with a Pixel 6
device on the 5.19 + pci-v5.20-changes kernel. My testing included running
with both ZONE_DMA32 and swiotlb disabled.

Thanks,
Will

Will McVicker (2):
  PCI: dwc: drop dependency on ZONE_DMA32
  PCI: dwc: add support for 64-bit MSI target address

 .../pci/controller/dwc/pcie-designware-host.c | 42 ++++++++++++-------
 drivers/pci/controller/dwc/pcie-designware.c  |  9 ++++
 drivers/pci/controller/dwc/pcie-designware.h  |  6 +++
 3 files changed, 41 insertions(+), 16 deletions(-)

-- 
2.37.1.559.g78731f0fdb-goog