static int eeh_reset_device (struct pci_dn *pe_dn, struct pci_bus *bus)
{
int cnt, rc;
/* pcibios will clear the counter; save the value */
cnt = pe_dn->eeh_freeze_count;
if (bus)
pcibios_remove_pci_devices(bus);
/* Reset the pci controller. (Asserts RST#; resets config space).
* Reconfigure bridges and devices. Don't try to bring the system
* up if the reset failed for some reason. */
rc = rtas_set_slot_reset(pe_dn);
if (rc)
return rc;
/* New-style config addrs might be shared across multiple devices,
* Walk over all functions on this device */
if (pe_dn->eeh_pe_config_addr) {
struct device_node *pe = pe_dn->node;
pe = pe->parent->child;
while (pe) {
struct pci_dn *ppe = PCI_DN(pe);
if (pe_dn->eeh_pe_config_addr == ppe->eeh_pe_config_addr) {
rtas_configure_bridge(ppe);
eeh_restore_bars(ppe);
}
pe = pe->sibling;
}
} else {
rtas_configure_bridge(pe_dn);
eeh_restore_bars(pe_dn);
}
/* Give the system 5 seconds to finish running the user-space
* hotplug shutdown scripts, e.g. ifdown for ethernet. Yes,
* this is a hack, but if we don't do this, and try to bring
* the device up before the scripts have taken it down,
* potentially weird things happen.
*/
if (bus) {
ssleep (5);
pcibios_add_pci_devices(bus);
}
pe_dn->eeh_freeze_count = cnt;
return 0;
}
/**
* eeh_reset_device - Perform actual reset of a pci slot
* @edev: PE associated EEH device
* @bus: PCI bus corresponding to the isolcated slot
*
* This routine must be called to do reset on the indicated PE.
* During the reset, udev might be invoked because those affected
* PCI devices will be removed and then added.
*/
static int eeh_reset_device(struct eeh_dev *edev, struct pci_bus *bus)
{
struct device_node *dn;
int cnt, rc;
/* pcibios will clear the counter; save the value */
cnt = edev->freeze_count;
if (bus)
pcibios_remove_pci_devices(bus);
/* Reset the pci controller. (Asserts RST#; resets config space).
* Reconfigure bridges and devices. Don't try to bring the system
* up if the reset failed for some reason.
*/
rc = eeh_reset_pe(edev);
if (rc)
return rc;
/* Walk over all functions on this device. */
dn = eeh_dev_to_of_node(edev);
if (!pcibios_find_pci_bus(dn) && of_node_to_eeh_dev(dn->parent))
dn = dn->parent->child;
while (dn) {
struct eeh_dev *pedev = of_node_to_eeh_dev(dn);
/* On Power4, always true because eeh_pe_config_addr=0 */
if (edev->pe_config_addr == pedev->pe_config_addr) {
eeh_ops->configure_bridge(dn);
eeh_restore_bars(pedev);
}
dn = dn->sibling;
}
/* Give the system 5 seconds to finish running the user-space
* hotplug shutdown scripts, e.g. ifdown for ethernet. Yes,
* this is a hack, but if we don't do this, and try to bring
* the device up before the scripts have taken it down,
* potentially weird things happen.
*/
if (bus) {
ssleep(5);
pcibios_add_pci_devices(bus);
}
edev->freeze_count = cnt;
return 0;
}
/**
* eeh_restore_bars - restore the PCI config space info
*
* This routine performs a recursive walk to the children
* of this device as well.
*/
void eeh_restore_bars(struct pci_dn *pdn)
{
struct device_node *dn;
if (!pdn)
return;
if ((pdn->eeh_mode & EEH_MODE_SUPPORTED) && !IS_BRIDGE(pdn->class_code))
__restore_bars (pdn);
dn = pdn->node->child;
while (dn) {
eeh_restore_bars (PCI_DN(dn));
dn = dn->sibling;
}
}
static int eeh_reset_device(struct eeh_dev *edev, struct pci_bus *bus)
{
struct device_node *dn;
int cnt, rc;
cnt = edev->freeze_count;
if (bus)
pcibios_remove_pci_devices(bus);
rc = eeh_reset_pe(edev);
if (rc)
return rc;
dn = eeh_dev_to_of_node(edev);
if (!pcibios_find_pci_bus(dn) && of_node_to_eeh_dev(dn->parent))
dn = dn->parent->child;
while (dn) {
struct eeh_dev *pedev = of_node_to_eeh_dev(dn);
if (edev->pe_config_addr == pedev->pe_config_addr) {
eeh_ops->configure_bridge(dn);
eeh_restore_bars(pedev);
}
dn = dn->sibling;
}
if (bus) {
ssleep(5);
pcibios_add_pci_devices(bus);
}
edev->freeze_count = cnt;
return 0;
}
