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authorBen Hutchings <bhutchings@solarflare.com>2011-10-05 22:35:03 +0100
committerJesse Barnes <jbarnes@virtuousgeek.org>2011-10-14 09:05:27 -0700
commita94d072b20239f6f615dc20f0a54f63e9b642f9e (patch)
treec9293c2d14142d6ffed8764f89e3af0333a2ee5d /drivers/pci
parent937383a58e47154d3098783df739e8fa8984a434 (diff)
downloadlinux-a94d072b20239f6f615dc20f0a54f63e9b642f9e.tar.bz2
PCI: Add quirk for known incorrect MPSS
Using legacy interrupts and TLPs > 256 bytes on the SFC4000 (all revisions) may cause interrupt messages to be replayed. In some systems this results in a non-recoverable MCE. Early boards using the SFC4000 set the maximum payload size supported (MPSS) to 1024 bytes and we should override that. There are probably other devices with similar issues, so give this quirk a generic name. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/quirks.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 1196f61a4ab6..f70c36f9b1f3 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -2822,6 +2822,20 @@ static void __devinit fixup_ti816x_class(struct pci_dev* dev)
}
DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_TI, 0xb800, fixup_ti816x_class);
+/* Some PCIe devices do not work reliably with the claimed maximum
+ * payload size supported.
+ */
+static void __devinit fixup_mpss_256(struct pci_dev *dev)
+{
+ dev->pcie_mpss = 1; /* 256 bytes */
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SOLARFLARE,
+ PCI_DEVICE_ID_SOLARFLARE_SFC4000A_0, fixup_mpss_256);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SOLARFLARE,
+ PCI_DEVICE_ID_SOLARFLARE_SFC4000A_1, fixup_mpss_256);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SOLARFLARE,
+ PCI_DEVICE_ID_SOLARFLARE_SFC4000B, fixup_mpss_256);
+
static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f,
struct pci_fixup *end)
{