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pci-v5.5-fixes-2

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Merge tag 'pci-v5.5-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI fix from Bjorn Helgaas:
 "Mark ATS as broken on AMD Navi14 GPU rev 0xc5 (Alex Deucher)"

* tag 'pci-v5.5-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI: Mark AMD Navi14 GPU rev 0xc5 ATS as broken
This commit is contained in:
Linus Torvalds 2020-01-23 11:08:15 -08:00
parent 3c2659bd1d 5e89cd303e
commit a572582b1a
1 changed files with 13 additions and 6 deletions
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19
drivers/pci/quirks.c
View file

@ -5074,18 +5074,25 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_SERVERWORKS, 0x0422, quirk_no_ext_tags);
#ifdef CONFIG_PCI_ATS
/*
* Some devices have a broken ATS implementation causing IOMMU stalls.
* Don't use ATS for those devices.
* 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
* chance to load and configure the device.
*/
static void quirk_no_ats(struct pci_dev *pdev)
static void quirk_amd_harvest_no_ats(struct pci_dev *pdev)
{
pci_info(pdev, "disabling ATS (broken on this device)\n");
if (pdev->device == 0x7340 && pdev->revision != 0xc5)
return;
pci_info(pdev, "disabling ATS\n");
pdev->ats_cap = 0;
}
/* AMD Stoney platform GPU */
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x98e4, quirk_no_ats);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x6900, quirk_no_ats);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x98e4, quirk_amd_harvest_no_ats);
/* AMD Iceland dGPU */
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x6900, quirk_amd_harvest_no_ats);
/* AMD Navi14 dGPU */
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x7340, quirk_amd_harvest_no_ats);
#endif /* CONFIG_PCI_ATS */
/* Freescale PCIe doesn't support MSI in RC mode */