Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / pci / pcie / portdrv_bus.c

diff --git a/kernel/drivers/pci/pcie/portdrv_bus.c b/kernel/drivers/pci/pcie/portdrv_bus.c
new file mode 100644 (file)
index 0000000..87e79a6
--- /dev/null
+++ b/kernel/drivers/pci/pcie/portdrv_bus.c
@@ -0,0 +1,55 @@
+/*
+ * File:       portdrv_bus.c
+ * Purpose:    PCI Express Port Bus Driver's Bus Overloading Functions
+ *
+ * Copyright (C) 2004 Intel
+ * Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/pm.h>
+
+#include <linux/pcieport_if.h>
+#include "portdrv.h"
+
+static int pcie_port_bus_match(struct device *dev, struct device_driver *drv);
+
+struct bus_type pcie_port_bus_type = {
+       .name           = "pci_express",
+       .match          = pcie_port_bus_match,
+};
+EXPORT_SYMBOL_GPL(pcie_port_bus_type);
+
+static int pcie_port_bus_match(struct device *dev, struct device_driver *drv)
+{
+       struct pcie_device *pciedev;
+       struct pcie_port_service_driver *driver;
+
+       if (drv->bus != &pcie_port_bus_type || dev->bus != &pcie_port_bus_type)
+               return 0;
+
+       pciedev = to_pcie_device(dev);
+       driver = to_service_driver(drv);
+
+       if (driver->service != pciedev->service)
+               return 0;
+
+       if ((driver->port_type != PCIE_ANY_PORT) &&
+           (driver->port_type != pci_pcie_type(pciedev->port)))
+               return 0;
+
+       return 1;
+}
+
+int pcie_port_bus_register(void)
+{
+       return bus_register(&pcie_port_bus_type);
+}
+
+void pcie_port_bus_unregister(void)
+{
+       bus_unregister(&pcie_port_bus_type);
+}