161 lines
3.5 KiB
C
161 lines
3.5 KiB
C
#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;
|
|
|
|
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)
|
|
{
|
|
pci_pme_active(dev, false);
|
|
|
|
if (dev->is_added) {
|
|
pci_proc_detach_device(dev);
|
|
pci_remove_sysfs_dev_files(dev);
|
|
device_release_driver(&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)
|
|
{
|
|
if (!dev->dev.kobj.parent)
|
|
return;
|
|
|
|
device_del(&dev->dev);
|
|
|
|
down_write(&pci_bus_sem);
|
|
list_del(&dev->bus_list);
|
|
up_write(&pci_bus_sem);
|
|
|
|
pci_free_resources(dev);
|
|
put_device(&dev->dev);
|
|
}
|
|
|
|
void pci_remove_bus(struct pci_bus *bus)
|
|
{
|
|
pci_proc_detach_bus(bus);
|
|
|
|
down_write(&pci_bus_sem);
|
|
list_del(&bus->node);
|
|
pci_bus_release_busn_res(bus);
|
|
up_write(&pci_bus_sem);
|
|
pci_remove_legacy_files(bus);
|
|
pcibios_remove_bus(bus);
|
|
device_unregister(&bus->dev);
|
|
}
|
|
EXPORT_SYMBOL(pci_remove_bus);
|
|
|
|
static void pci_stop_bus_device(struct pci_dev *dev)
|
|
{
|
|
struct pci_bus *bus = dev->subordinate;
|
|
struct pci_dev *child, *tmp;
|
|
|
|
/*
|
|
* Stopping an SR-IOV PF device removes all the associated VFs,
|
|
* which will update the bus->devices list and confuse the
|
|
* iterator. Therefore, iterate in reverse so we remove the VFs
|
|
* first, then the PF.
|
|
*/
|
|
if (bus) {
|
|
list_for_each_entry_safe_reverse(child, tmp,
|
|
&bus->devices, bus_list)
|
|
pci_stop_bus_device(child);
|
|
}
|
|
|
|
pci_stop_dev(dev);
|
|
}
|
|
|
|
static void pci_remove_bus_device(struct pci_dev *dev)
|
|
{
|
|
struct pci_bus *bus = dev->subordinate;
|
|
struct pci_dev *child, *tmp;
|
|
|
|
if (bus) {
|
|
list_for_each_entry_safe(child, tmp,
|
|
&bus->devices, bus_list)
|
|
pci_remove_bus_device(child);
|
|
|
|
pci_remove_bus(bus);
|
|
dev->subordinate = NULL;
|
|
}
|
|
|
|
pci_destroy_dev(dev);
|
|
}
|
|
|
|
/**
|
|
* pci_stop_and_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_stop_and_remove_bus_device(struct pci_dev *dev)
|
|
{
|
|
pci_stop_bus_device(dev);
|
|
pci_remove_bus_device(dev);
|
|
}
|
|
EXPORT_SYMBOL(pci_stop_and_remove_bus_device);
|
|
|
|
void pci_stop_and_remove_bus_device_locked(struct pci_dev *dev)
|
|
{
|
|
pci_lock_rescan_remove();
|
|
pci_stop_and_remove_bus_device(dev);
|
|
pci_unlock_rescan_remove();
|
|
}
|
|
EXPORT_SYMBOL_GPL(pci_stop_and_remove_bus_device_locked);
|
|
|
|
void pci_stop_root_bus(struct pci_bus *bus)
|
|
{
|
|
struct pci_dev *child, *tmp;
|
|
struct pci_host_bridge *host_bridge;
|
|
|
|
if (!pci_is_root_bus(bus))
|
|
return;
|
|
|
|
host_bridge = to_pci_host_bridge(bus->bridge);
|
|
list_for_each_entry_safe_reverse(child, tmp,
|
|
&bus->devices, bus_list)
|
|
pci_stop_bus_device(child);
|
|
|
|
/* stop the host bridge */
|
|
device_release_driver(&host_bridge->dev);
|
|
}
|
|
|
|
void pci_remove_root_bus(struct pci_bus *bus)
|
|
{
|
|
struct pci_dev *child, *tmp;
|
|
struct pci_host_bridge *host_bridge;
|
|
|
|
if (!pci_is_root_bus(bus))
|
|
return;
|
|
|
|
host_bridge = to_pci_host_bridge(bus->bridge);
|
|
list_for_each_entry_safe(child, tmp,
|
|
&bus->devices, bus_list)
|
|
pci_remove_bus_device(child);
|
|
pci_remove_bus(bus);
|
|
host_bridge->bus = NULL;
|
|
|
|
/* remove the host bridge */
|
|
device_unregister(&host_bridge->dev);
|
|
}
|