1#include <linux/pci.h> 2#include <linux/module.h> 3#include "pci.h" 4 5static void pci_free_resources(struct pci_dev *dev) 6{ 7 int i; 8 9 msi_remove_pci_irq_vectors(dev); 10 11 pci_cleanup_rom(dev); 12 for (i = 0; i < PCI_NUM_RESOURCES; i++) { 13 struct resource *res = dev->resource + i; 14 if (res->parent) 15 release_resource(res); 16 } 17} 18 19static void pci_stop_dev(struct pci_dev *dev) 20{ 21 if (!dev->global_list.next) 22 return; 23 24 if (!list_empty(&dev->global_list)) { 25 pci_proc_detach_device(dev); 26 pci_remove_sysfs_dev_files(dev); 27 device_unregister(&dev->dev); 28 down_write(&pci_bus_sem); 29 list_del(&dev->global_list); 30 dev->global_list.next = dev->global_list.prev = NULL; 31 up_write(&pci_bus_sem); 32 } 33} 34 35static void pci_destroy_dev(struct pci_dev *dev) 36{ 37 pci_stop_dev(dev); 38 39 /* Remove the device from the device lists, and prevent any further 40 * list accesses from this device */ 41 down_write(&pci_bus_sem); 42 list_del(&dev->bus_list); 43 dev->bus_list.next = dev->bus_list.prev = NULL; 44 up_write(&pci_bus_sem); 45 46 pci_free_resources(dev); 47 pci_dev_put(dev); 48} 49 50/** 51 * pci_remove_device_safe - remove an unused hotplug device 52 * @dev: the device to remove 53 * 54 * Delete the device structure from the device lists and 55 * notify userspace (/sbin/hotplug), but only if the device 56 * in question is not being used by a driver. 57 * Returns 0 on success. 58 */ 59 60void pci_remove_bus(struct pci_bus *pci_bus) 61{ 62 pci_proc_detach_bus(pci_bus); 63 64 down_write(&pci_bus_sem); 65 list_del(&pci_bus->node); 66 up_write(&pci_bus_sem); 67 pci_remove_legacy_files(pci_bus); 68 class_device_remove_file(&pci_bus->class_dev, 69 &class_device_attr_cpuaffinity); 70 sysfs_remove_link(&pci_bus->class_dev.kobj, "bridge"); 71 class_device_unregister(&pci_bus->class_dev); 72} 73EXPORT_SYMBOL(pci_remove_bus); 74 75/** 76 * pci_remove_bus_device - remove a PCI device and any children 77 * @dev: the device to remove 78 * 79 * Remove a PCI device from the device lists, informing the drivers 80 * that the device has been removed. We also remove any subordinate 81 * buses and children in a depth-first manner. 82 * 83 * For each device we remove, delete the device structure from the 84 * device lists, remove the /proc entry, and notify userspace 85 * (/sbin/hotplug). 86 */ 87void pci_remove_bus_device(struct pci_dev *dev) 88{ 89 if (dev->subordinate) { 90 struct pci_bus *b = dev->subordinate; 91 92 pci_remove_behind_bridge(dev); 93 pci_remove_bus(b); 94 dev->subordinate = NULL; 95 } 96 97 pci_destroy_dev(dev); 98} 99 100/** 101 * pci_remove_behind_bridge - remove all devices behind a PCI bridge 102 * @dev: PCI bridge device 103 * 104 * Remove all devices on the bus, except for the parent bridge. 105 * This also removes any child buses, and any devices they may 106 * contain in a depth-first manner. 107 */ 108void pci_remove_behind_bridge(struct pci_dev *dev) 109{ 110 struct list_head *l, *n; 111 112 if (dev->subordinate) { 113 list_for_each_safe(l, n, &dev->subordinate->devices) { 114 struct pci_dev *dev = pci_dev_b(l); 115 116 pci_remove_bus_device(dev); 117 } 118 } 119} 120 121static void pci_stop_bus_devices(struct pci_bus *bus) 122{ 123 struct list_head *l, *n; 124 125 list_for_each_safe(l, n, &bus->devices) { 126 struct pci_dev *dev = pci_dev_b(l); 127 pci_stop_bus_device(dev); 128 } 129} 130 131/** 132 * pci_stop_bus_device - stop a PCI device and any children 133 * @dev: the device to stop 134 * 135 * Stop a PCI device (detach the driver, remove from the global list 136 * and so on). This also stop any subordinate buses and children in a 137 * depth-first manner. 138 */ 139void pci_stop_bus_device(struct pci_dev *dev) 140{ 141 if (dev->subordinate) 142 pci_stop_bus_devices(dev->subordinate); 143 144 pci_stop_dev(dev); 145} 146 147EXPORT_SYMBOL(pci_remove_bus_device); 148EXPORT_SYMBOL(pci_remove_behind_bridge); 149EXPORT_SYMBOL_GPL(pci_stop_bus_device); 150