fd7d1ced29
This moves the pci_bus class device to be a real struct device and at the same time, place it in the device tree in the correct location. Note, the old "bridge" symlink is now gone, but this was a non-standard link and no userspace program used it. If you need to determine the device that the bus is on, follow the standard device symlink, or walk up the device tree. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
161 lines
3.7 KiB
C
161 lines
3.7 KiB
C
#include <linux/pci.h>
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#include <linux/module.h>
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#include <linux/aspm.h>
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#include "pci.h"
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static void pci_free_resources(struct pci_dev *dev)
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{
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int i;
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msi_remove_pci_irq_vectors(dev);
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pci_cleanup_rom(dev);
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for (i = 0; i < PCI_NUM_RESOURCES; i++) {
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struct resource *res = dev->resource + i;
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if (res->parent)
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release_resource(res);
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}
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}
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static void pci_stop_dev(struct pci_dev *dev)
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{
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if (!dev->global_list.next)
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return;
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if (!list_empty(&dev->global_list)) {
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pci_proc_detach_device(dev);
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pci_remove_sysfs_dev_files(dev);
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device_unregister(&dev->dev);
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down_write(&pci_bus_sem);
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list_del(&dev->global_list);
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dev->global_list.next = dev->global_list.prev = NULL;
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up_write(&pci_bus_sem);
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}
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if (dev->bus->self)
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pcie_aspm_exit_link_state(dev);
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}
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static void pci_destroy_dev(struct pci_dev *dev)
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{
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pci_stop_dev(dev);
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/* Remove the device from the device lists, and prevent any further
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* list accesses from this device */
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down_write(&pci_bus_sem);
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list_del(&dev->bus_list);
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dev->bus_list.next = dev->bus_list.prev = NULL;
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up_write(&pci_bus_sem);
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pci_free_resources(dev);
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pci_dev_put(dev);
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}
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/**
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* pci_remove_device_safe - remove an unused hotplug device
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* @dev: the device to remove
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*
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* Delete the device structure from the device lists and
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* notify userspace (/sbin/hotplug), but only if the device
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* in question is not being used by a driver.
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* Returns 0 on success.
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*/
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#if 0
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int pci_remove_device_safe(struct pci_dev *dev)
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{
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if (pci_dev_driver(dev))
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return -EBUSY;
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pci_destroy_dev(dev);
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return 0;
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}
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#endif /* 0 */
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void pci_remove_bus(struct pci_bus *pci_bus)
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{
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pci_proc_detach_bus(pci_bus);
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down_write(&pci_bus_sem);
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list_del(&pci_bus->node);
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up_write(&pci_bus_sem);
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pci_remove_legacy_files(pci_bus);
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device_remove_file(&pci_bus->dev, &dev_attr_cpuaffinity);
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device_unregister(&pci_bus->dev);
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}
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EXPORT_SYMBOL(pci_remove_bus);
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/**
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* pci_remove_bus_device - remove a PCI device and any children
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* @dev: the device to remove
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*
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* Remove a PCI device from the device lists, informing the drivers
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* that the device has been removed. We also remove any subordinate
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* buses and children in a depth-first manner.
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*
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* For each device we remove, delete the device structure from the
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* device lists, remove the /proc entry, and notify userspace
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* (/sbin/hotplug).
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*/
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void pci_remove_bus_device(struct pci_dev *dev)
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{
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if (dev->subordinate) {
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struct pci_bus *b = dev->subordinate;
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pci_remove_behind_bridge(dev);
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pci_remove_bus(b);
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dev->subordinate = NULL;
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}
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pci_destroy_dev(dev);
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}
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/**
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* pci_remove_behind_bridge - remove all devices behind a PCI bridge
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* @dev: PCI bridge device
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*
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* Remove all devices on the bus, except for the parent bridge.
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* This also removes any child buses, and any devices they may
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* contain in a depth-first manner.
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*/
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void pci_remove_behind_bridge(struct pci_dev *dev)
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{
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struct list_head *l, *n;
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if (dev->subordinate) {
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list_for_each_safe(l, n, &dev->subordinate->devices) {
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struct pci_dev *dev = pci_dev_b(l);
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pci_remove_bus_device(dev);
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}
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}
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}
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static void pci_stop_bus_devices(struct pci_bus *bus)
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{
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struct list_head *l, *n;
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list_for_each_safe(l, n, &bus->devices) {
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struct pci_dev *dev = pci_dev_b(l);
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pci_stop_bus_device(dev);
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}
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}
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/**
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* pci_stop_bus_device - stop a PCI device and any children
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* @dev: the device to stop
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*
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* Stop a PCI device (detach the driver, remove from the global list
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* and so on). This also stop any subordinate buses and children in a
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* depth-first manner.
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*/
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void pci_stop_bus_device(struct pci_dev *dev)
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{
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if (dev->subordinate)
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pci_stop_bus_devices(dev->subordinate);
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pci_stop_dev(dev);
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}
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EXPORT_SYMBOL(pci_remove_bus_device);
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EXPORT_SYMBOL(pci_remove_behind_bridge);
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EXPORT_SYMBOL_GPL(pci_stop_bus_device);
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