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| author | Joerg Roedel <joerg.roedel@amd.com> | 2011-12-01 15:04:58 +0400 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2011-12-12 18:19:06 +0400 |
| commit | 6a113ddc03bcc32d3d440dce42b445868d5be093 (patch) | |
| tree | 2788087070898e12721ea94ddcde336f748ce7ff /include/linux/amd-iommu.h | |
| parent | f3572db823decfd747e6afd4c4ddfd67e8af8b6d (diff) | |
| download | linux-6a113ddc03bcc32d3d440dce42b445868d5be093.tar.xz | |
iommu/amd: Add device errata handling
Add infrastructure for errata-handling and handle two known
erratas in the IOMMUv2 code.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'include/linux/amd-iommu.h')
| -rw-r--r-- | include/linux/amd-iommu.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/amd-iommu.h b/include/linux/amd-iommu.h index a6863a2dec1f..4152c3073db4 100644 --- a/include/linux/amd-iommu.h +++ b/include/linux/amd-iommu.h @@ -26,6 +26,24 @@ extern int amd_iommu_detect(void); + +/** + * amd_iommu_enable_device_erratum() - Enable erratum workaround for device + * in the IOMMUv2 driver + * @pdev: The PCI device the workaround is necessary for + * @erratum: The erratum workaround to enable + * + * Possible values for the erratum number are for now: + * - AMD_PRI_DEV_ERRATUM_ENABLE_RESET - Reset PRI capability when PRI + * is enabled + * - AMD_PRI_DEV_ERRATUM_LIMIT_REQ_ONE - Limit number of outstanding PRI + * requests to one + */ +#define AMD_PRI_DEV_ERRATUM_ENABLE_RESET 0 +#define AMD_PRI_DEV_ERRATUM_LIMIT_REQ_ONE 1 + +extern void amd_iommu_enable_device_erratum(struct pci_dev *pdev, u32 erratum); + #else static inline int amd_iommu_detect(void) { return -ENODEV; } |