struct pci_dev;
extern int amd_iommu_detect(void);
-extern int amd_iommu_bind_pasid(struct pci_dev *pdev, int pasid,
- struct task_struct *task);
-extern void amd_iommu_unbind_pasid(struct pci_dev *pdev, int pasid);
/**
*/
extern void amd_iommu_unbind_pasid(struct pci_dev *pdev, int pasid);
+/**
+ * amd_iommu_set_invalid_ppr_cb() - Register a call-back for failed
+ * PRI requests
+ * @pdev: The PCI device the call-back should be registered for
+ * @cb: The call-back function
+ *
+ * The IOMMUv2 driver invokes this call-back when it is unable to
+ * successfully handle a PRI request. The device driver can then decide
+ * which PRI response the device should see. Possible return values for
+ * the call-back are:
+ *
+ * - AMD_IOMMU_INV_PRI_RSP_SUCCESS - Send SUCCESS back to the device
+ * - AMD_IOMMU_INV_PRI_RSP_INVALID - Send INVALID back to the device
+ * - AMD_IOMMU_INV_PRI_RSP_FAIL - Send Failure back to the device,
+ * the device is required to disable
+ * PRI when it receives this response
+ *
+ * The function returns 0 on success or negative value on error.
+ */
+#define AMD_IOMMU_INV_PRI_RSP_SUCCESS 0
+#define AMD_IOMMU_INV_PRI_RSP_INVALID 1
+#define AMD_IOMMU_INV_PRI_RSP_FAIL 2
+
+typedef int (*amd_iommu_invalid_ppr_cb)(struct pci_dev *pdev,
+ int pasid,
+ unsigned long address,
+ u16);
+
+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);
+
+/**
+ * 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; }