#include <linux/pci.h> #include <linux/module.h> #include <linux/pci-aspm.h> #include "pci.h" static void pci_free_resources(struct pci_dev *dev) { int i; msi_remove_pci_irq_vectors(dev); pci_cleanup_rom(dev); for (i = 0; i < PCI_NUM_RESOURCES; i++) { struct resource *res = dev->resource + i; if (res->parent) release_resource(res); } } static void pci_stop_dev(struct pci_dev *dev) { if (dev->is_added) { pci_proc_detach_device(dev); pci_remove_sysfs_dev_files(dev); device_unregister(&dev->dev); dev->is_added = 0; } if (dev->bus->self) pcie_aspm_exit_link_state(dev); } static void pci_destroy_dev(struct pci_dev *dev) { /* Remove the device from the device lists, and prevent any further * list accesses from this device */ down_write(&pci_bus_sem); list_del(&dev->bus_list); dev->bus_list.next = dev->bus_list.prev = NULL; up_write(&pci_bus_sem); pci_free_resources(dev); pci_dev_put(dev); } /** * pci_remove_device_safe - remove an unused hotplug device * @dev: the device to remove * * Delete the device structure from the device lists and * notify userspace (/sbin/hotplug), but only if the device * in question is not being used by a driver. * Returns 0 on success. */ #if 0 int pci_remove_device_safe(struct pci_dev *dev) { if (pci_dev_driver(dev)) return -EBUSY; pci_destroy_dev(dev); return 0; } #endif /* 0 */ void pci_remove_bus(struct pci_bus *pci_bus) { pci_proc_detach_bus(pci_bus); down_write(&pci_bus_sem); list_del(&pci_bus->node); up_write(&pci_bus_sem); if (!pci_bus->is_added) return; pci_remove_legacy_files(pci_bus); device_remove_file(&pci_bus->dev, &dev_attr_cpuaffinity); device_remove_file(&pci_bus->dev, &dev_attr_cpulistaffinity); device_unregister(&pci_bus->dev); } EXPORT_SYMBOL(pci_remove_bus); /** * pci_remove_bus_device - remove a PCI device and any children * @dev: the device to remove * * Remove a PCI device from the device lists, informing the drivers * that the device has been removed. We also remove any subordinate * buses and children in a depth-first manner. * * For each device we remove, delete the device structure from the * device lists, remove the /proc entry, and notify userspace * (/sbin/hotplug). */ void pci_remove_bus_device(struct pci_dev *dev) { pci_stop_bus_device(dev); if (dev->subordinate) { struct pci_bus *b = dev->subordinate; pci_remove_behind_bridge(dev); pci_remove_bus(b); dev->subordinate = NULL; } pci_destroy_dev(dev); } /** * pci_remove_behind_bridge - remove all devices behind a PCI bridge * @dev: PCI bridge device * * Remove all devices on the bus, except for the parent bridge. * This also removes any child buses, and any devices they may * contain in a depth-first manner. */ void pci_remove_behind_bridge(struct pci_dev *dev) { struct list_head *l, *n; if (dev->subordinate) list_for_each_safe(l, n, &dev->subordinate->devices) pci_remove_bus_device(pci_dev_b(l)); } static void pci_stop_bus_devices(struct pci_bus *bus) { struct list_head *l, *n; list_for_each_safe(l, n, &bus->devices) { struct pci_dev *dev = pci_dev_b(l); pci_stop_bus_device(dev); } } /** * pci_stop_bus_device - stop a PCI device and any children * @dev: the device to stop * * Stop a PCI device (detach the driver, remove from the global list * and so on). This also stop any subordinate buses and children in a * depth-first manner. */ void pci_stop_bus_device(struct pci_dev *dev) { if (dev->subordinate) pci_stop_bus_devices(dev->subordinate); pci_stop_dev(dev); } EXPORT_SYMBOL(pci_remove_bus_device); EXPORT_SYMBOL(pci_remove_behind_bridge); EXPORT_SYMBOL_GPL(pci_stop_bus_device);