| Message ID | 20210430232624.25153-2-sdonthineni@nvidia.com (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
| Series | [v5,1/2] PCI: Add support for a function level reset based on _RST method | expand |
On 4/30/2021 7:26 PM, Shanker Donthineni wrote: > On select platforms, some Nvidia GPU devices do not work with SBR. > Triggering SBR would leave the device inoperable for the current > system boot. It requires a system hard-reboot to get the GPU device > back to normal operating condition post-SBR. For the affected > devices, enable NO_BUS_RESET quirk to fix the issue. > > This issue will be fixed in the next generation of hardware. > > Signed-off-by: Shanker Donthineni <sdonthineni@nvidia.com> Reviewed-by: Sinan Kaya <okaya@kernel.org>
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 8f47d139c381..ceec67342365 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -3558,6 +3558,18 @@ static void quirk_no_bus_reset(struct pci_dev *dev) dev->dev_flags |= PCI_DEV_FLAGS_NO_BUS_RESET; } +/* + * Some Nvidia GPU devices do not work with bus reset, SBR needs to be + * prevented for those affected devices. + */ +static void quirk_nvidia_no_bus_reset(struct pci_dev *dev) +{ + if ((dev->device & 0xffc0) == 0x2340) + quirk_no_bus_reset(dev); +} +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, + quirk_nvidia_no_bus_reset); + /* * Some Atheros AR9xxx and QCA988x chips do not behave after a bus reset. * The device will throw a Link Down error on AER-capable systems and
On select platforms, some Nvidia GPU devices do not work with SBR. Triggering SBR would leave the device inoperable for the current system boot. It requires a system hard-reboot to get the GPU device back to normal operating condition post-SBR. For the affected devices, enable NO_BUS_RESET quirk to fix the issue. This issue will be fixed in the next generation of hardware. Signed-off-by: Shanker Donthineni <sdonthineni@nvidia.com> --- Changes since v4: - Move reset quirk next to the existing no_bus reset quirks Changes since v1: - Split patch into 2, code for handling _RST and SBR specific quirk - The RST based reset is called as a first-class mechanism in the reset code path drivers/pci/quirks.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)