forked from luck/tmp_suning_uos_patched
3f9a7a13fe
For SR-IOV, the PF PRI is shared between the PF and any associated VFs, and
the PRI Capability is allowed for PFs but not for VFs. Searching for the
PRI Capability on a VF always fails, even if its associated PF supports
PRI.
Add pci_pri_supported() to check whether device or its associated PF
supports PRI.
[bhelgaas: commit log, avoid "!!"]
Fixes: b16d0cb9e2 ("iommu/vt-d: Always enable PASID/PRI PCI capabilities before ATS")
Link: https://lore.kernel.org/r/1595543849-19692-1-git-send-email-ashok.raj@intel.com
Signed-off-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Acked-by: Joerg Roedel <jroedel@suse.de>
Cc: stable@vger.kernel.org # v4.4+
53 lines
1.8 KiB
C
53 lines
1.8 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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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 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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#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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#endif /* CONFIG_PCI_PASID */
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#endif /* LINUX_PCI_ATS_H */
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