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