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| author | Joerg Roedel <joerg.roedel@amd.com> | 2011-09-27 15:57:16 +0200 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2011-10-14 09:05:35 -0700 |
| commit | 086ac11f6435c9dc2fe5025fc8ea3a1dbca273d6 (patch) | |
| tree | 29e9445f029b73bac174900cb68d5e1fd2748cef /include/linux/pci-ats.h | |
| parent | c320b976d7837c561ce4aa49dfe0a64f0e527ce4 (diff) | |
| download | lwn-086ac11f6435c9dc2fe5025fc8ea3a1dbca273d6.tar.gz lwn-086ac11f6435c9dc2fe5025fc8ea3a1dbca273d6.zip | |
PCI: Add support for PASID capability
Devices supporting Process Address Space Identifiers
(PASIDs) can use an IOMMU to access multiple IO address
spaces at the same time. A PCIe device indicates support for
this feature by implementing the PASID capability. This
patch adds support for the capability to the Linux kernel.
Reviewed-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'include/linux/pci-ats.h')
| -rw-r--r-- | include/linux/pci-ats.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/include/linux/pci-ats.h b/include/linux/pci-ats.h index 071395251abf..e3d0b3890249 100644 --- a/include/linux/pci-ats.h +++ b/include/linux/pci-ats.h @@ -93,4 +93,35 @@ static inline int pci_pri_status(struct pci_dev *pdev) } #endif /* CONFIG_PCI_PRI */ +#ifdef CONFIG_PCI_PASID + +extern int pci_enable_pasid(struct pci_dev *pdev, int features); +extern void pci_disable_pasid(struct pci_dev *pdev); +extern int pci_pasid_features(struct pci_dev *pdev); +extern int pci_max_pasids(struct pci_dev *pdev); + +#else /* CONFIG_PCI_PASID */ + +static inline int pci_enable_pasid(struct pci_dev *pdev, int features) +{ + return -EINVAL; +} + +static inline void pci_disable_pasid(struct pci_dev *pdev) +{ +} + +static inline int pci_pasid_features(struct pci_dev *pdev) +{ + return -EINVAL; +} + +static inline int pci_max_pasids(struct pci_dev *pdev) +{ + return -EINVAL; +} + +#endif /* CONFIG_PCI_PASID */ + + #endif /* LINUX_PCI_ATS_H*/ |