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[v8,7/9] PCI/ATS: Add PRI stubs

Message ID 20201112125519.3987595-8-jean-philippe@linaro.org
State New
Headers show
Series iommu: I/O page faults for SMMUv3 | expand

Commit Message

Jean-Philippe Brucker Nov. 12, 2020, 12:55 p.m. UTC
The SMMUv3 driver, which can be built without CONFIG_PCI, will soon gain
support for PRI.  Partially revert commit c6e9aefbf9db ("PCI/ATS: Remove
unused PRI and PASID stubs") to re-introduce the PRI stubs, and avoid
adding more #ifdefs to the SMMU driver.

Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
 include/linux/pci-ats.h | 7 +++++++
 1 file changed, 7 insertions(+)
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diff --git a/include/linux/pci-ats.h b/include/linux/pci-ats.h
index df54cd5b15db..ccfca09fd232 100644
--- a/include/linux/pci-ats.h
+++ b/include/linux/pci-ats.h
@@ -30,6 +30,13 @@  int pci_reset_pri(struct pci_dev *pdev);
 int pci_prg_resp_pasid_required(struct pci_dev *pdev);
 bool pci_pri_supported(struct pci_dev *pdev);
+static inline int pci_enable_pri(struct pci_dev *pdev, u32 reqs)
+{ return -ENODEV; }
+static inline void pci_disable_pri(struct pci_dev *pdev) { }
+static inline int pci_reset_pri(struct pci_dev *pdev)
+{ return -ENODEV; }
+static inline int pci_prg_resp_pasid_required(struct pci_dev *pdev)
+{ return 0; }
 static inline bool pci_pri_supported(struct pci_dev *pdev)
 { return false; }
 #endif /* CONFIG_PCI_PRI */