first commit

1 files changed, 127 insertions, 0 deletions

diff --git a/include/linux/pci-ats.h b/include/linux/pci-ats.h
new file mode 100644
index 000000000..68bcefd7f
--- /dev/null
+++ b/include/linux/pci-ats.h
@@ -0,0 +1,127 @@
+#ifndef LINUX_PCI_ATS_H
+#define LINUX_PCI_ATS_H
+
+#include <linux/pci.h>
+
+/* Address Translation Service */
+struct pci_ats {
+	int pos;        /* capability position */
+	int stu;        /* Smallest Translation Unit */
+	int qdep;       /* Invalidate Queue Depth */
+	int ref_cnt;    /* Physical Function reference count */
+	unsigned int is_enabled:1;      /* Enable bit is set */
+};
+
+#ifdef CONFIG_PCI_ATS
+
+int pci_enable_ats(struct pci_dev *dev, int ps);
+void pci_disable_ats(struct pci_dev *dev);
+int pci_ats_queue_depth(struct pci_dev *dev);
+
+/**
+ * pci_ats_enabled - query the ATS status
+ * @dev: the PCI device
+ *
+ * Returns 1 if ATS capability is enabled, or 0 if not.
+ */
+static inline int pci_ats_enabled(struct pci_dev *dev)
+{
+	return dev->ats && dev->ats->is_enabled;
+}
+
+#else /* CONFIG_PCI_ATS */
+
+static inline int pci_enable_ats(struct pci_dev *dev, int ps)
+{
+	return -ENODEV;
+}
+
+static inline void pci_disable_ats(struct pci_dev *dev)
+{
+}
+
+static inline int pci_ats_queue_depth(struct pci_dev *dev)
+{
+	return -ENODEV;
+}
+
+static inline int pci_ats_enabled(struct pci_dev *dev)
+{
+	return 0;
+}
+
+#endif /* CONFIG_PCI_ATS */
+
+#ifdef CONFIG_PCI_PRI
+
+int pci_enable_pri(struct pci_dev *pdev, u32 reqs);
+void pci_disable_pri(struct pci_dev *pdev);
+bool pci_pri_enabled(struct pci_dev *pdev);
+int pci_reset_pri(struct pci_dev *pdev);
+bool pci_pri_stopped(struct pci_dev *pdev);
+int pci_pri_status(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 bool pci_pri_enabled(struct pci_dev *pdev)
+{
+	return false;
+}
+
+static inline int pci_reset_pri(struct pci_dev *pdev)
+{
+	return -ENODEV;
+}
+
+static inline bool pci_pri_stopped(struct pci_dev *pdev)
+{
+	return true;
+}
+
+static inline int pci_pri_status(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);
+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 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*/