[PATCH v4 24/26] PCI/ATS: Add PRI stubs
From: Jean-Philippe Brucker <hidden>
Date: 2020-02-24 18:25:35
Also in:
linux-devicetree, linux-iommu, linux-mm, linux-pci
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
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.
Cc: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Jean-Philippe Brucker <redacted>
---
include/linux/pci-ats.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/include/linux/pci-ats.h b/include/linux/pci-ats.h
index f75c307f346d..e9e266df9b37 100644
--- a/include/linux/pci-ats.h
+++ b/include/linux/pci-ats.h@@ -28,6 +28,14 @@ int pci_enable_pri(struct pci_dev *pdev, u32 reqs); void pci_disable_pri(struct pci_dev *pdev); int pci_reset_pri(struct pci_dev *pdev); int pci_prg_resp_pasid_required(struct pci_dev *pdev); +#else /* CONFIG_PCI_PRI */ +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; } #endif /* CONFIG_PCI_PRI */ #ifdef CONFIG_PCI_PASID
--
2.25.0
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