struct pci_bus * __devinit pcibios_scan_root(int busnum)
{
struct pci_bus *bus = NULL;
struct pci_sysdata *sd;
while ((bus = pci_find_next_bus(bus)) != NULL) {
if (bus->number == busnum) {
/* Already scanned */
return bus;
}
}
/* Allocate per-root-bus (not per bus) arch-specific data.
* TODO: leak; this memory is never freed.
* It's arguable whether it's worth the trouble to care.
*/
sd = kzalloc(sizeof(*sd), GFP_KERNEL);
if (!sd) {
printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum);
return NULL;
}
sd->node = get_mp_bus_to_node(busnum);
printk(KERN_DEBUG "PCI: Probing PCI hardware (bus %02x)\n", busnum);
bus = pci_scan_bus_parented(NULL, busnum, &pci_root_ops, sd);
if (!bus)
kfree(sd);
return bus;
}
struct pci_bus * __devinit
pci_acpi_scan_root(struct acpi_device *device, int domain, int bus)
{
struct pci_root_info info;
struct pci_controller *controller;
unsigned int windows = 0;
struct pci_bus *pbus;
char *name;
int pxm;
controller = alloc_pci_controller(domain);
if (!controller)
goto out1;
controller->acpi_handle = device->handle;
pxm = acpi_get_pxm(controller->acpi_handle);
#ifdef CONFIG_NUMA
if (pxm >= 0)
controller->node = pxm_to_node(pxm);
#endif
acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_window,
&windows);
if (windows) {
controller->window =
kmalloc_node(sizeof(*controller->window) * windows,
GFP_KERNEL, controller->node);
if (!controller->window)
goto out2;
}
name = kmalloc(16, GFP_KERNEL);
if (!name)
goto out3;
sprintf(name, "PCI Bus %04x:%02x", domain, bus);
info.controller = controller;
info.name = name;
acpi_walk_resources(device->handle, METHOD_NAME__CRS, add_window,
&info);
/*
* See arch/x86/pci/acpi.c.
* The desired pci bus might already be scanned in a quirk. We
* should handle the case here, but it appears that IA64 hasn't
* such quirk. So we just ignore the case now.
*/
pbus = pci_scan_bus_parented(NULL, bus, &pci_root_ops, controller);
if (pbus)
pcibios_setup_root_windows(pbus, controller);
return pbus;
out3:
kfree(controller->window);
out2:
kfree(controller);
out1:
return NULL;
}
int vpci_bus_init(void)
{
struct pci_dev *pcidev = NULL;
sysdata = kzalloc(sizeof(void *), GFP_KERNEL);
vbus = pci_scan_bus_parented(NULL, 2, & vpci_ops, sysdata);
//vbus = pci_create_root_bus(NULL,i,& vpci_ops, sysdata,NULL);
//if (vbus != NULL)
//break;
memset(sysdata, 0, sizeof(void *));
if (vbus == NULL) {
kfree(sysdata);
return -EINVAL;
}
if (pci_register_driver(& vpci_vdev_driver) < 0) {
pci_remove_bus(vbus);
vbus = NULL;
return -EINVAL;
}
pcidev = pci_scan_single_device(vbus, 0);
if (pcidev == NULL)
return 0;
else
pci_dev_get(pcidev);
pci_bus_add_devices(vbus);
return 0;
}
struct pci_bus * __devinit
pci_acpi_scan_root(struct acpi_device *device, int domain, int bus)
{
struct pci_root_info info;
struct pci_controller *controller;
unsigned int windows = 0;
struct pci_bus *pbus;
char *name;
int pxm;
controller = alloc_pci_controller(domain);
if (!controller)
goto out1;
controller->acpi_handle = device->handle;
pxm = acpi_get_pxm(controller->acpi_handle);
#ifdef CONFIG_NUMA
if (pxm >= 0)
controller->node = pxm_to_node(pxm);
#endif
acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_window,
&windows);
controller->window = kmalloc_node(sizeof(*controller->window) * windows,
GFP_KERNEL, controller->node);
if (!controller->window)
goto out2;
name = kmalloc(16, GFP_KERNEL);
if (!name)
goto out3;
sprintf(name, "PCI Bus %04x:%02x", domain, bus);
info.controller = controller;
info.name = name;
acpi_walk_resources(device->handle, METHOD_NAME__CRS, add_window,
&info);
pbus = pci_scan_bus_parented(NULL, bus, &pci_root_ops, controller);
if (pbus)
pcibios_setup_root_windows(pbus, controller);
return pbus;
out3:
kfree(controller->window);
out2:
kfree(controller);
out1:
return NULL;
}
