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Merge branch 'pci/ats'

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- Disable ATS for Intel IPU E2000 A- and B-stepping devices to avoid
  invalidation message endianness erratum (Bartosz Pawlowski)

* pci/ats:
  PCI: Disable ATS for specific Intel IPU E2000 devices
  PCI: Extract ATS disabling to a helper function
This commit is contained in:
Bjorn Helgaas 2023-10-28 13:30:57 -05:00
commit 3c14a05072
1 changed files with 28 additions and 7 deletions
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35
drivers/pci/quirks.c
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@ -5507,6 +5507,12 @@ 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);
#ifdef CONFIG_PCI_ATS
static void quirk_no_ats(struct pci_dev *pdev)
{
pci_info(pdev, "disabling ATS\n");
pdev->ats_cap = 0;
}
/*
* Some devices require additional driver setup to enable ATS. Don't use
* ATS for those devices as ATS will be enabled before the driver has had a
@ -5520,14 +5526,10 @@ static void quirk_amd_harvest_no_ats(struct pci_dev *pdev)
(pdev->subsystem_device == 0xce19 ||
pdev->subsystem_device == 0xcc10 ||
pdev->subsystem_device == 0xcc08))
goto no_ats;
else
return;
quirk_no_ats(pdev);
} else {
quirk_no_ats(pdev);
}
no_ats:
pci_info(pdev, "disabling ATS\n");
pdev->ats_cap = 0;
}
/* AMD Stoney platform GPU */
@ -5550,6 +5552,25 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7347, quirk_amd_harvest_no_ats);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x734f, quirk_amd_harvest_no_ats);
/* AMD Raven platform iGPU */
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x15d8, quirk_amd_harvest_no_ats);
/*
* Intel IPU E2000 revisions before C0 implement incorrect endianness
* in ATS Invalidate Request message body. Disable ATS for those devices.
*/
static void quirk_intel_e2000_no_ats(struct pci_dev *pdev)
{
if (pdev->revision < 0x20)
quirk_no_ats(pdev);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1451, quirk_intel_e2000_no_ats);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1452, quirk_intel_e2000_no_ats);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1453, quirk_intel_e2000_no_ats);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1454, quirk_intel_e2000_no_ats);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1455, quirk_intel_e2000_no_ats);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1457, quirk_intel_e2000_no_ats);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x1459, quirk_intel_e2000_no_ats);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x145a, quirk_intel_e2000_no_ats);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x145c, quirk_intel_e2000_no_ats);
#endif /* CONFIG_PCI_ATS */
/* Freescale PCIe doesn't support MSI in RC mode */