v4.19.13 snapshot.
diff --git a/include/linux/pci-ats.h b/include/linux/pci-ats.h
new file mode 100644
index 0000000..7c4b8e2
--- /dev/null
+++ b/include/linux/pci-ats.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef LINUX_PCI_ATS_H
+#define LINUX_PCI_ATS_H
+
+#include <linux/pci.h>
+
+#ifdef CONFIG_PCI_PRI
+
+int pci_enable_pri(struct pci_dev *pdev, u32 reqs);
+void pci_disable_pri(struct pci_dev *pdev);
+void pci_restore_pri_state(struct pci_dev *pdev);
+int pci_reset_pri(struct pci_dev *pdev);
+
+#else /* CONFIG_PCI_PRI */
+
+static inline int pci_enable_pri(struct pci_dev *pdev, u32 reqs)
+{
+ return -ENODEV;
+}
+
+static inline void pci_disable_pri(struct pci_dev *pdev)
+{
+}
+
+static inline void pci_restore_pri_state(struct pci_dev *pdev)
+{
+}
+
+static inline int pci_reset_pri(struct pci_dev *pdev)
+{
+ return -ENODEV;
+}
+
+#endif /* CONFIG_PCI_PRI */
+
+#ifdef CONFIG_PCI_PASID
+
+int pci_enable_pasid(struct pci_dev *pdev, int features);
+void pci_disable_pasid(struct pci_dev *pdev);
+void pci_restore_pasid_state(struct pci_dev *pdev);
+int pci_pasid_features(struct pci_dev *pdev);
+int pci_max_pasids(struct pci_dev *pdev);
+
+#else /* CONFIG_PCI_PASID */
+
+static inline int pci_enable_pasid(struct pci_dev *pdev, int features)
+{
+ return -EINVAL;
+}
+
+static inline void pci_disable_pasid(struct pci_dev *pdev)
+{
+}
+
+static inline void pci_restore_pasid_state(struct pci_dev *pdev)
+{
+}
+
+static inline int pci_pasid_features(struct pci_dev *pdev)
+{
+ return -EINVAL;
+}
+
+static inline int pci_max_pasids(struct pci_dev *pdev)
+{
+ return -EINVAL;
+}
+
+#endif /* CONFIG_PCI_PASID */
+
+
+#endif /* LINUX_PCI_ATS_H*/