/* * 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> static int pcie_port_bus_match(struct device *dev, struct device_driver *drv); static int pcie_port_bus_suspend(struct device *dev, pm_message_t state); static int pcie_port_bus_resume(struct device *dev); struct bus_type pcie_port_bus_type = { .name = "pci_express", .match = pcie_port_bus_match, .suspend = pcie_port_bus_suspend, .resume = pcie_port_bus_resume, }; 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->id_table->vendor != PCI_ANY_ID && driver->id_table->vendor != pciedev->id.vendor) || (driver->id_table->device != PCI_ANY_ID && driver->id_table->device != pciedev->id.device) || (driver->id_table->port_type != PCIE_ANY_PORT && driver->id_table->port_type != pciedev->id.port_type) || driver->id_table->service_type != pciedev->id.service_type ) return 0; return 1; } static int pcie_port_bus_suspend(struct device *dev, pm_message_t state) { struct pcie_device *pciedev; struct pcie_port_service_driver *driver; if (!dev || !dev->driver) return 0; pciedev = to_pcie_device(dev); driver = to_service_driver(dev->driver); if (driver && driver->suspend) driver->suspend(pciedev, state); return 0; } static int pcie_port_bus_resume(struct device *dev) { struct pcie_device *pciedev; struct pcie_port_service_driver *driver; if (!dev || !dev->driver) return 0; pciedev = to_pcie_device(dev); driver = to_service_driver(dev->driver); if (driver && driver->resume) driver->resume(pciedev); return 0; }