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| author | Jörg Wedekind <joerg@wedekind.de> | 2024-02-19 14:28:11 +0100 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2024-02-20 14:55:03 -0600 |
| commit | baf67aefbe7d7deafa59ca49612d163f8889934c (patch) | |
| tree | a6cd624c9443c77269b25b14a3a8c84eb49a7a7a | |
| parent | 1e8cc8e6bd85d7b25e0ed3759aedde804c91ba97 (diff) | |
| download | lwn-baf67aefbe7d7deafa59ca49612d163f8889934c.tar.gz lwn-baf67aefbe7d7deafa59ca49612d163f8889934c.zip | |
PCI: Mark 3ware-9650SE Root Port Extended Tags as broken
Per PCIe r6.1, sec 2.2.6.2 and 7.5.3.4, a Requester may not use 8-bit Tags
unless its Extended Tag Field Enable is set, but all Receivers/Completers
must handle 8-bit Tags correctly regardless of their Extended Tag Field
Enable.
Some devices do not handle 8-bit Tags as Completers, so add a quirk for
them. If we find such a device, we disable Extended Tags for the entire
hierarchy to make peer-to-peer DMA possible.
The 3ware 9650SE seems to have issues with handling 8-bit tags. Mark it as
broken.
This fixes PCI Parity Errors like :
3w-9xxx: scsi0: ERROR: (0x06:0x000C): PCI Parity Error: clearing.
3w-9xxx: scsi0: ERROR: (0x06:0x000D): PCI Abort: clearing.
3w-9xxx: scsi0: ERROR: (0x06:0x000E): Controller Queue Error: clearing.
3w-9xxx: scsi0: ERROR: (0x06:0x0010): Microcontroller Error: clearing.
Link: https://lore.kernel.org/r/20240219132811.8351-1-joerg@wedekind.de
Fixes: 60db3a4d8cc9 ("PCI: Enable PCIe Extended Tags if supported")
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=202425
Signed-off-by: Jörg Wedekind <joerg@wedekind.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
| -rw-r--r-- | drivers/pci/quirks.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index d797df6e5f3e..2ebbe51a7efe 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -5527,6 +5527,7 @@ static void quirk_no_ext_tags(struct pci_dev *pdev) pci_walk_bus(bridge->bus, pci_configure_extended_tags, NULL); } +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_3WARE, 0x1004, quirk_no_ext_tags); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0132, quirk_no_ext_tags); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0140, quirk_no_ext_tags); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0141, quirk_no_ext_tags); |