diff options
| author | Joerg Roedel <joerg.roedel@amd.com> | 2011-12-07 12:01:36 +0100 |
|---|---|---|
| committer | Hiroshi DOYU <hdoyu@nvidia.com> | 2012-01-23 11:11:42 +0200 |
| commit | 095e1e7bacec964c45221858dea2754214b707b2 (patch) | |
| tree | 998e3b62c9be2cddd094b9de854876e12873ce03 /include | |
| parent | 7b2d0f9035a9fc0ced091edb0aaba75b522e3374 (diff) | |
iommu/amd: Add amd_iommu_device_info() function
This function can be used to find out which features
necessary for IOMMUv2 usage are available on a given device.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/amd-iommu.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/linux/amd-iommu.h b/include/linux/amd-iommu.h index 06688c42167d..c03c281ae6ee 100644 --- a/include/linux/amd-iommu.h +++ b/include/linux/amd-iommu.h @@ -119,6 +119,32 @@ typedef int (*amd_iommu_invalid_ppr_cb)(struct pci_dev *pdev, extern int amd_iommu_set_invalid_ppr_cb(struct pci_dev *pdev, amd_iommu_invalid_ppr_cb cb); +/** + * amd_iommu_device_info() - Get information about IOMMUv2 support of a + * PCI device + * @pdev: PCI device to query information from + * @info: A pointer to an amd_iommu_device_info structure which will contain + * the information about the PCI device + * + * Returns 0 on success, negative value on error + */ + +#define AMD_IOMMU_DEVICE_FLAG_ATS_SUP 0x1 /* ATS feature supported */ +#define AMD_IOMMU_DEVICE_FLAG_PRI_SUP 0x2 /* PRI feature supported */ +#define AMD_IOMMU_DEVICE_FLAG_PASID_SUP 0x4 /* PASID context supported */ +#define AMD_IOMMU_DEVICE_FLAG_EXEC_SUP 0x8 /* Device may request execution + on memory pages */ +#define AMD_IOMMU_DEVICE_FLAG_PRIV_SUP 0x10 /* Device may request + super-user privileges */ + +struct amd_iommu_device_info { + int max_pasids; + u32 flags; +}; + +extern int amd_iommu_device_info(struct pci_dev *pdev, + struct amd_iommu_device_info *info); + #else static inline int amd_iommu_detect(void) { return -ENODEV; } |