From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 drivers/pci/pcie/portdrv_bus.c | 55 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 drivers/pci/pcie/portdrv_bus.c

(limited to 'drivers/pci/pcie/portdrv_bus.c')

diff --git a/drivers/pci/pcie/portdrv_bus.c b/drivers/pci/pcie/portdrv_bus.c
new file mode 100644
index 000000000..87e79a6ff
--- /dev/null
+++ b/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);
+}
-- 
cgit v1.2.3-54-g00ecf