From baf67aefbe7d7deafa59ca49612d163f8889934c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Wedekind?= <joerg@wedekind.de>
Date: Mon, 19 Feb 2024 14:28:11 +0100
Subject: [PATCH] PCI: Mark 3ware-9650SE Root Port Extended Tags as broken
Mime-version: 1.0
Content-type: text/plain; charset=UTF-8
Content-transfer-encoding: 8bit
Git-commit: baf67aefbe7d7deafa59ca49612d163f8889934c
Patch-mainline: v6.9-rc1
References: git-fixes
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>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/pci/quirks.c | 1 +
1 file changed, 1 insertion(+)
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);
--
2.43.0