PCI: Mark Px210 PCI-E Extended Tags as broken

Per PCIe r3.1, sec 2.2.6.2 and 7.8.4, 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. Phytium Px210 chipset has some issues with 8-bit Tags enabled when doing DMA operations, add this quirk to disable Extended Tags for the entire hierarchy to avoid the problem. Signed-off-by: Liu Tao <[email protected]> Signed-off-by: Chen Baozi <[email protected]> Signed-off-by: Wang Yinfeng <[email protected]> Signed-off-by: Wang Zhimin <[email protected]> Signed-off-by: wangzhimin1179 <[email protected]>
wangzhimin1179 · Jun 14, 2024 · 28d8e6b · 28d8e6b
1 parent c823b5d
commit 28d8e6b
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
@@ -5535,6 +5535,7 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0142, quirk_no_ext_tags);
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0144, quirk_no_ext_tags);
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0420, quirk_no_ext_tags);
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0422, quirk_no_ext_tags);
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PHYTIUM, 0xdc3a, quirk_no_ext_tags);
 
 #ifdef CONFIG_PCI_ATS
 static void quirk_no_ats(struct pci_dev *pdev)