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authorJoerg Roedel <joerg.roedel@amd.com>2011-12-07 15:24:42 +0400
committerJoerg Roedel <joerg.roedel@amd.com>2011-12-15 14:15:39 +0400
commitbc21662f729cd17d2af93e149f4eccafc7b10181 (patch)
treecb980b6412dc1b42383fefe9898c808167d4a4c6 /include/linux/amd-iommu.h
parent52efdb89d60a0f19949129a08af3437a7aab70be (diff)
downloadlinux-bc21662f729cd17d2af93e149f4eccafc7b10181.tar.xz
iommu/amd: Add invalidate-context call-back
This call-back is invoked when the task that is bound to a pasid is about to exit. The driver can use it to shutdown all context related to that context in a safe way. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'include/linux/amd-iommu.h')
-rw-r--r--include/linux/amd-iommu.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/amd-iommu.h b/include/linux/amd-iommu.h
index c03c281ae6ee..ef00610837d4 100644
--- a/include/linux/amd-iommu.h
+++ b/include/linux/amd-iommu.h
@@ -145,6 +145,23 @@ struct amd_iommu_device_info {
extern int amd_iommu_device_info(struct pci_dev *pdev,
struct amd_iommu_device_info *info);
+/**
+ * amd_iommu_set_invalidate_ctx_cb() - Register a call-back for invalidating
+ * a pasid context. This call-back is
+ * invoked when the IOMMUv2 driver needs to
+ * invalidate a PASID context, for example
+ * because the task that is bound to that
+ * context is about to exit.
+ *
+ * @pdev: The PCI device the call-back should be registered for
+ * @cb: The call-back function
+ */
+
+typedef void (*amd_iommu_invalidate_ctx)(struct pci_dev *pdev, int pasid);
+
+extern int amd_iommu_set_invalidate_ctx_cb(struct pci_dev *pdev,
+ amd_iommu_invalidate_ctx cb);
+
#else
static inline int amd_iommu_detect(void) { return -ENODEV; }