/**
* pseries_eeh_read_config - Read PCI config space
* @dn: device node
* @where: PCI address
* @size: size to read
* @val: return value
*
* Read config space from the speicifed device
*/
static int pseries_eeh_read_config(struct device_node *dn, int where, int size, u32 *val)
{
struct pci_dn *pdn;
pdn = PCI_DN(dn);
return rtas_read_config(pdn, where, size, val);
}
/**
* eeh_save_bars - save device bars
*
* Save the values of the device bars. Unlike the restore
* routine, this routine is *not* recursive. This is because
* PCI devices are added individuallly; but, for the restore,
* an entire slot is reset at a time.
*/
static void eeh_save_bars(struct pci_dn *pdn)
{
int i;
if (!pdn )
return;
for (i = 0; i < 16; i++)
rtas_read_config(pdn, i * 4, 4, &pdn->config_space[i]);
}
static int rtas_pci_read_config(struct pci_bus *bus,
unsigned int devfn,
int where, int size, u32 *val)
{
struct device_node *busdn, *dn;
busdn = pci_bus_to_OF_node(bus);
/* Search only direct children of the bus */
for (dn = busdn->child; dn; dn = dn->sibling) {
struct pci_dn *pdn = PCI_DN(dn);
if (pdn && pdn->devfn == devfn
&& of_device_is_available(dn))
return rtas_read_config(pdn, where, size, val);
}
return PCIBIOS_DEVICE_NOT_FOUND;
}