iommu/amd: Implement function to send PPR completions

To send completions for PPR requests this patch adds a
function which can be used by the IOMMUv2 driver.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/iommu/amd_iommu_proto.h b/drivers/iommu/amd_iommu_proto.h
index a951a7090e35..bb5ecfecfa44 100644
--- a/drivers/iommu/amd_iommu_proto.h
+++ b/drivers/iommu/amd_iommu_proto.h
@@ -47,6 +47,12 @@ extern int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, int pasid,
                                      unsigned long cr3);
 extern int amd_iommu_domain_clear_gcr3(struct iommu_domain *dom, int pasid);
 
+#define PPR_SUCCESS                     0x0
+#define PPR_INVALID                     0x1
+#define PPR_FAILURE                     0xf
+
+extern int amd_iommu_complete_ppr(struct pci_dev *pdev, int pasid,
+                                  int status, int tag);
 
 #ifndef CONFIG_AMD_IOMMU_STATS