1 // SPDX-License-Identifier: GPL-2.0+
3  * PCI Hot Plug Controller Driver for RPA-compliant PPC64 platform.
14 #include <asm/pci-bridge.h>
26 	rc = rtas_get_sensor(DR_ENTITY_SENSE, slot->index, state);  in rpaphp_get_sensor_state()
29 		if (rc == -EFAULT || rc == -EEXIST) {  in rpaphp_get_sensor_state()
30 			dbg("%s: slot must be power up to get sensor-state\n",  in rpaphp_get_sensor_state()
34 			 * before get-sensor will succeed.  in rpaphp_get_sensor_state()
36 			rc = rtas_set_power_level(slot->power_domain, POWER_ON,  in rpaphp_get_sensor_state()
40 				    __func__, slot->name, rc);  in rpaphp_get_sensor_state()
43 						     slot->index, state);  in rpaphp_get_sensor_state()
45 		} else if (rc == -ENODEV)  in rpaphp_get_sensor_state()
54  * rpaphp_enable_slot - record slot state, config pci device
66 	slot->state = EMPTY;  in rpaphp_enable_slot()
69 	rc = rtas_get_power_level(slot->power_domain, &level);  in rpaphp_enable_slot()
78 	bus = pci_find_bus_by_node(slot->dn);  in rpaphp_enable_slot()
80 		err("%s: no pci_bus for dn %pOF\n", __func__, slot->dn);  in rpaphp_enable_slot()
81 		return -EINVAL;  in rpaphp_enable_slot()
84 	slot->bus = bus;  in rpaphp_enable_slot()
85 	slot->pci_devs = &bus->devices;  in rpaphp_enable_slot()
89 		slot->state = NOT_CONFIGURED;  in rpaphp_enable_slot()
91 		/* non-empty slot has to have child */  in rpaphp_enable_slot()
92 		if (!slot->dn->child) {  in rpaphp_enable_slot()
94 			    __func__, slot->name);  in rpaphp_enable_slot()
95 			return -EINVAL;  in rpaphp_enable_slot()
98 		if (list_empty(&bus->devices)) {  in rpaphp_enable_slot()
99 			pseries_eeh_init_edev_recursive(PCI_DN(slot->dn));  in rpaphp_enable_slot()
103 		if (!list_empty(&bus->devices)) {  in rpaphp_enable_slot()
104 			slot->state = CONFIGURED;  in rpaphp_enable_slot()
109 			dbg("%s: pci_devs of slot[%pOF]\n", __func__, slot->dn);  in rpaphp_enable_slot()
110 			list_for_each_entry(dev, &bus->devices, bus_list)  in rpaphp_enable_slot()