static int of_pci_phb_probe(struct platform_device *dev)
{
struct pci_controller *phb;
/* Check if we can do that ... */
if (ppc_md.pci_setup_phb == NULL)
return -ENODEV;
pr_info("Setting up PCI bus %s\n", dev->dev.of_node->full_name);
/* Alloc and setup PHB data structure */
phb = pcibios_alloc_controller(dev->dev.of_node);
if (!phb)
return -ENODEV;
/* Setup parent in sysfs */
phb->parent = &dev->dev;
/* Setup the PHB using arch provided callback */
if (ppc_md.pci_setup_phb(phb)) {
pcibios_free_controller(phb);
return -ENODEV;
}
/* Process "ranges" property */
pci_process_bridge_OF_ranges(phb, dev->dev.of_node, 0);
/* Init pci_dn data structures */
pci_devs_phb_init_dynamic(phb);
/* Create EEH devices for the PHB */
eeh_dev_phb_init_dynamic(phb);
/* Register devices with EEH */
if (dev->dev.of_node->child)
eeh_add_device_tree_early(dev->dev.of_node);
/* Scan the bus */
pcibios_scan_phb(phb);
if (phb->bus == NULL)
return -ENXIO;
/* Claim resources. This might need some rework as well depending
* whether we are doing probe-only or not, like assigning unassigned
* resources etc...
*/
pcibios_claim_one_bus(phb->bus);
/* Finish EEH setup */
eeh_add_device_tree_late(phb->bus);
/* Add probed PCI devices to the device model */
pci_bus_add_devices(phb->bus);
/* sysfs files should only be added after devices are added */
eeh_add_sysfs_files(phb->bus);
return 0;
}
int cxl_pci_vphb_add(struct cxl_afu *afu)
{
struct pci_dev *phys_dev;
struct pci_controller *phb, *phys_phb;
struct device_node *vphb_dn;
struct device *parent;
if (cpu_has_feature(CPU_FTR_HVMODE)) {
phys_dev = to_pci_dev(afu->adapter->dev.parent);
phys_phb = pci_bus_to_host(phys_dev->bus);
vphb_dn = phys_phb->dn;
parent = &phys_dev->dev;
} else {
vphb_dn = afu->adapter->dev.parent->of_node;
parent = afu->adapter->dev.parent;
}
/* Alloc and setup PHB data structure */
phb = pcibios_alloc_controller(vphb_dn);
if (!phb)
return -ENODEV;
/* Setup parent in sysfs */
phb->parent = parent;
/* Setup the PHB using arch provided callback */
phb->ops = &cxl_pcie_pci_ops;
phb->cfg_addr = NULL;
phb->cfg_data = 0;
phb->private_data = afu;
phb->controller_ops = cxl_pci_controller_ops;
/* Scan the bus */
pcibios_scan_phb(phb);
if (phb->bus == NULL)
return -ENXIO;
/* Claim resources. This might need some rework as well depending
* whether we are doing probe-only or not, like assigning unassigned
* resources etc...
*/
pcibios_claim_one_bus(phb->bus);
/* Add probed PCI devices to the device model */
pci_bus_add_devices(phb->bus);
afu->phb = phb;
return 0;
}
int cxl_pci_vphb_add(struct cxl_afu *afu)
{
struct pci_controller *phb;
struct device_node *vphb_dn;
struct device *parent;
/*
* If there are no AFU configuration records we won't have anything to
* expose under the vPHB, so skip creating one, returning success since
* this is still a valid case. This will also opt us out of EEH
* handling since we won't have anything special to do if there are no
* kernel drivers attached to the vPHB, and EEH handling is not yet
* supported in the peer model.
*/
if (!afu->crs_num)
return 0;
/* The parent device is the adapter. Reuse the device node of
* the adapter.
* We don't seem to care what device node is used for the vPHB,
* but tools such as lsvpd walk up the device parents looking
* for a valid location code, so we might as well show devices
* attached to the adapter as being located on that adapter.
*/
parent = afu->adapter->dev.parent;
vphb_dn = parent->of_node;
/* Alloc and setup PHB data structure */
phb = pcibios_alloc_controller(vphb_dn);
if (!phb)
return -ENODEV;
/* Setup parent in sysfs */
phb->parent = parent;
/* Setup the PHB using arch provided callback */
phb->ops = &cxl_pcie_pci_ops;
phb->cfg_addr = NULL;
phb->cfg_data = NULL;
phb->private_data = afu;
phb->controller_ops = cxl_pci_controller_ops;
/* Scan the bus */
pcibios_scan_phb(phb);
if (phb->bus == NULL)
return -ENXIO;
/* Set release hook on root bus */
pci_set_host_bridge_release(to_pci_host_bridge(phb->bus->bridge),
pcibios_free_controller_deferred,
(void *) phb);
/* Claim resources. This might need some rework as well depending
* whether we are doing probe-only or not, like assigning unassigned
* resources etc...
*/
pcibios_claim_one_bus(phb->bus);
/* Add probed PCI devices to the device model */
pci_bus_add_devices(phb->bus);
afu->phb = phb;
return 0;
}
