Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #include <linux/pci.h> |
| 2 | #include <linux/module.h> |
| 3 | #include "pci.h" |
| 4 | |
| 5 | static 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 | |
| 19 | static void pci_destroy_dev(struct pci_dev *dev) |
| 20 | { |
Rajesh Shah | 091ca9f | 2005-04-28 00:25:49 -0700 | [diff] [blame^] | 21 | if (!list_empty(&dev->global_list)) { |
| 22 | pci_proc_detach_device(dev); |
| 23 | pci_remove_sysfs_dev_files(dev); |
| 24 | device_unregister(&dev->dev); |
| 25 | spin_lock(&pci_bus_lock); |
| 26 | list_del(&dev->global_list); |
| 27 | dev->global_list.next = dev->global_list.prev = NULL; |
| 28 | spin_unlock(&pci_bus_lock); |
| 29 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
| 31 | /* Remove the device from the device lists, and prevent any further |
| 32 | * list accesses from this device */ |
| 33 | spin_lock(&pci_bus_lock); |
| 34 | list_del(&dev->bus_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | dev->bus_list.next = dev->bus_list.prev = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | spin_unlock(&pci_bus_lock); |
| 37 | |
| 38 | pci_free_resources(dev); |
| 39 | pci_dev_put(dev); |
| 40 | } |
| 41 | |
| 42 | /** |
| 43 | * pci_remove_device_safe - remove an unused hotplug device |
| 44 | * @dev: the device to remove |
| 45 | * |
| 46 | * Delete the device structure from the device lists and |
| 47 | * notify userspace (/sbin/hotplug), but only if the device |
| 48 | * in question is not being used by a driver. |
| 49 | * Returns 0 on success. |
| 50 | */ |
| 51 | int pci_remove_device_safe(struct pci_dev *dev) |
| 52 | { |
| 53 | if (pci_dev_driver(dev)) |
| 54 | return -EBUSY; |
| 55 | pci_destroy_dev(dev); |
| 56 | return 0; |
| 57 | } |
| 58 | EXPORT_SYMBOL(pci_remove_device_safe); |
| 59 | |
| 60 | void pci_remove_bus(struct pci_bus *pci_bus) |
| 61 | { |
| 62 | pci_proc_detach_bus(pci_bus); |
| 63 | |
| 64 | spin_lock(&pci_bus_lock); |
| 65 | list_del(&pci_bus->node); |
| 66 | spin_unlock(&pci_bus_lock); |
| 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 | } |
| 73 | EXPORT_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 | */ |
| 87 | void 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 | */ |
| 108 | void 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 | |
| 121 | EXPORT_SYMBOL(pci_remove_bus_device); |
| 122 | EXPORT_SYMBOL(pci_remove_behind_bridge); |