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| author | Jason S. McMullan <jason.mcmullan@netronome.com> | 2015-09-30 15:35:07 +0900 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2016-09-02 23:39:37 -0400 |
| commit | 2ca638dd9ba7a92a75196831e48cd22536e54787 (patch) | |
| tree | 13f8d5c6bc989c32a22d233d8b722f3f3955384b | |
| parent | ebcd02166277b5754a731d48a8ee004133abc345 (diff) | |
| download | lwn-2ca638dd9ba7a92a75196831e48cd22536e54787.tar.gz lwn-2ca638dd9ba7a92a75196831e48cd22536e54787.zip | |
PCI: Limit config space size for Netronome NFP6000 family
[ Upstream commit 9f33a2ae59f24452c1076749deb615bccd435ca9 ]
The NFP6000 has an erratum where reading/writing to PCI config space
addresses above 0x600 can cause the NFP to generate PCIe completion
timeouts.
Limit the NFP6000's config space size to 0x600 bytes.
Signed-off-by: Jason S. McMullan <jason.mcmullan@netronome.com>
[simon: edited changelog]
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
| -rw-r--r-- | drivers/pci/quirks.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index ae12c0317645..e31e04b4b8f4 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -288,6 +288,17 @@ static void quirk_citrine(struct pci_dev *dev) } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CITRINE, quirk_citrine); +/* + * This chip can cause bus lockups if config addresses above 0x600 + * are read or written. + */ +static void quirk_nfp6000(struct pci_dev *dev) +{ + dev->cfg_size = 0x600; +} +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_ID_NETRONOME_NFP6000, quirk_nfp6000); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NETRONOME, PCI_DEVICE_ID_NETRONOME_NFP6000_VF, quirk_nfp6000); + /* On IBM Crocodile ipr SAS adapters, expand BAR to system page size */ static void quirk_extend_bar_to_page(struct pci_dev *dev) { |