drivers/pci/probe.c

461 	u32 buses;
466 	pci_read_config_dword(bridge, PCI_PRIMARY_BUS, &buses);
468 	res.start = (buses >> 8) & 0xff;
469 	res.end = (buses >> 16) & 0xff;
1243  * pci_scan_bridge_extend() - Scan buses behind a bridge
1246  * @max: Starting subordinate number of buses behind this bridge
1247  * @available_buses: Total number of buses available for this bridge and
1249  *		     been allocated the remaining buses will be
1260  * them, we proceed to assigning numbers to the remaining buses in
1263  * Return: New subordinate number covering all buses behind this bridge.
1271 	u32 buses, i, j = 0;
1285 	pci_read_config_dword(dev, PCI_PRIMARY_BUS, &buses);
1286 	primary = buses & 0xFF;
1287 	secondary = (buses >> 8) & 0xFF;
1288 	subordinate = (buses >> 16) & 0xFF;
1319 		unsigned int cmax, buses;
1344 		buses = subordinate - secondary;
1345 		cmax = pci_scan_child_bus_extend(child, buses);
1371 						       buses & ~0xffffff);
1402 		buses = (buses & 0xff000000)
1412 			buses &= ~0xff000000;
1413 			buses |= CARDBUS_LATENCY_TIMER << 24;
1417 		pci_write_config_dword(dev, PCI_PRIMARY_BUS, buses);
1493  * pci_scan_bridge() - Scan buses behind a bridge
1496  * @max: Starting subordinate number of buses behind this bridge
1506  * them, we proceed to assigning numbers to the remaining buses in
1509  * Return: New subordinate number covering all buses behind this bridge.
2876  * @available_buses: Total number of buses available (%0 does not try to
2879  * Scans devices below @bus including subordinate buses. Returns new
2899 	/* Reserve buses for SR-IOV capability */
2916 	 * buses between hotplug bridges.
2945 		unsigned int buses = 0;
2950 			 * port) so it gets all available buses which it
2954 			buses = available_buses;
2957 			 * Distribute the extra buses between hotplug
2960 			buses = available_buses / hotplug_bridges;
2961 			buses = min(buses, available_buses - used_buses + 1);
2965 		max = pci_scan_bridge_extend(bus, dev, cmax, buses, 1);
2973 	 * number of buses but allow it to grow up to the maximum available
2982 			/* Do not allocate more buses than we have room left */
2996 	 * Return how far we've got finding sub-buses.
3006  * Scans devices below @bus including subordinate buses. Returns new
3255  * Scan a PCI bus and child buses for new devices, add them,
3280  * Scan a PCI bus and child buses for new devices, add them,