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path: root/kernel/drivers/pci/pcie/portdrv_bus.c
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Diffstat (limited to 'kernel/drivers/pci/pcie/portdrv_bus.c')
-rw-r--r--kernel/drivers/pci/pcie/portdrv_bus.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/kernel/drivers/pci/pcie/portdrv_bus.c b/kernel/drivers/pci/pcie/portdrv_bus.c
new file mode 100644
index 000000000..87e79a6ff
--- /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);
+}