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    Subject[PATCH 5.10 159/167] PCI: Mark AMD Navi14 GPU ATS as broken
    Date
    From: Evan Quan <evan.quan@amd.com>

    commit e8946a53e2a698c148b3b3ed732f43c7747fbeb6 upstream

    Observed unexpected GPU hang during runpm stress test on 0x7341 rev 0x00.
    Further debugging shows broken ATS is related.

    Disable ATS on this part. Similar issues on other devices:

    a2da5d8cc0b0 ("PCI: Mark AMD Raven iGPU ATS as broken in some platforms")
    45beb31d3afb ("PCI: Mark AMD Navi10 GPU rev 0x00 ATS as broken")
    5e89cd303e3a ("PCI: Mark AMD Navi14 GPU rev 0xc5 ATS as broken")

    Suggested-by: Alex Deucher <alexander.deucher@amd.com>
    Link: https://lore.kernel.org/r/20210602021255.939090-1-evan.quan@amd.com
    Signed-off-by: Evan Quan <evan.quan@amd.com>
    Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
    Reviewed-by: Krzysztof Wilczyński <kw@linux.com>
    Cc: stable@vger.kernel.org
    [sudip: adjust context]
    Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/pci/quirks.c | 4 +++-
    1 file changed, 3 insertions(+), 1 deletion(-)

    --- a/drivers/pci/quirks.c
    +++ b/drivers/pci/quirks.c
    @@ -5264,7 +5264,8 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SE
    static void quirk_amd_harvest_no_ats(struct pci_dev *pdev)
    {
    if ((pdev->device == 0x7312 && pdev->revision != 0x00) ||
    - (pdev->device == 0x7340 && pdev->revision != 0xc5))
    + (pdev->device == 0x7340 && pdev->revision != 0xc5) ||
    + (pdev->device == 0x7341 && pdev->revision != 0x00))
    return;

    pci_info(pdev, "disabling ATS\n");
    @@ -5279,6 +5280,7 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AT
    DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7312, quirk_amd_harvest_no_ats);
    /* AMD Navi14 dGPU */
    DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7340, quirk_amd_harvest_no_ats);
    +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7341, quirk_amd_harvest_no_ats);
    #endif /* CONFIG_PCI_ATS */

    /* Freescale PCIe doesn't support MSI in RC mode */

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