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803f97298e
PASID usage requires PASID support in both device and IOMMU. Since the iommu drivers always enable the PASID capability for the device if it is supported, this extends the IOMMU_GET_HW_INFO to report the PASID capability to userspace. Also, enhances the selftest accordingly. Link: https://patch.msgid.link/r/20250321180143.8468-5-yi.l.liu@intel.com Cc: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Tested-by: Zhangfei Gao <zhangfei.gao@linaro.org> #aarch64 platform Tested-by: Nicolin Chen <nicolinc@nvidia.com> Signed-off-by: Yi Liu <yi.l.liu@intel.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
58 lines
2 KiB
C
58 lines
2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef LINUX_PCI_ATS_H
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#define LINUX_PCI_ATS_H
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#include <linux/pci.h>
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#ifdef CONFIG_PCI_ATS
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/* Address Translation Service */
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bool pci_ats_supported(struct pci_dev *dev);
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int pci_enable_ats(struct pci_dev *dev, int ps);
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int pci_prepare_ats(struct pci_dev *dev, int ps);
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void pci_disable_ats(struct pci_dev *dev);
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int pci_ats_queue_depth(struct pci_dev *dev);
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int pci_ats_page_aligned(struct pci_dev *dev);
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#else /* CONFIG_PCI_ATS */
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static inline bool pci_ats_supported(struct pci_dev *d)
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{ return false; }
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static inline int pci_enable_ats(struct pci_dev *d, int ps)
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{ return -ENODEV; }
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static inline int pci_prepare_ats(struct pci_dev *dev, int ps)
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{ return -ENODEV; }
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static inline void pci_disable_ats(struct pci_dev *d) { }
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static inline int pci_ats_queue_depth(struct pci_dev *d)
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{ return -ENODEV; }
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static inline int pci_ats_page_aligned(struct pci_dev *dev)
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{ return 0; }
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#endif /* CONFIG_PCI_ATS */
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#ifdef CONFIG_PCI_PRI
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int pci_enable_pri(struct pci_dev *pdev, u32 reqs);
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void pci_disable_pri(struct pci_dev *pdev);
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int pci_reset_pri(struct pci_dev *pdev);
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int pci_prg_resp_pasid_required(struct pci_dev *pdev);
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bool pci_pri_supported(struct pci_dev *pdev);
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#else
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static inline bool pci_pri_supported(struct pci_dev *pdev)
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{ return false; }
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#endif /* CONFIG_PCI_PRI */
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#ifdef CONFIG_PCI_PASID
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int pci_enable_pasid(struct pci_dev *pdev, int features);
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void pci_disable_pasid(struct pci_dev *pdev);
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int pci_pasid_features(struct pci_dev *pdev);
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int pci_max_pasids(struct pci_dev *pdev);
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int pci_pasid_status(struct pci_dev *pdev);
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#else /* CONFIG_PCI_PASID */
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static inline int pci_enable_pasid(struct pci_dev *pdev, int features)
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{ return -EINVAL; }
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static inline void pci_disable_pasid(struct pci_dev *pdev) { }
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static inline int pci_pasid_features(struct pci_dev *pdev)
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{ return -EINVAL; }
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static inline int pci_max_pasids(struct pci_dev *pdev)
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{ return -EINVAL; }
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static inline int pci_pasid_status(struct pci_dev *pdev)
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{ return -EINVAL; }
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#endif /* CONFIG_PCI_PASID */
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#endif /* LINUX_PCI_ATS_H */
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