1 /* 2 * qdev fw helpers 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, 7 * or (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, see <http://www.gnu.org/licenses/>. 16 */ 17 18 #include "qemu/osdep.h" 19 #include "hw/qdev.h" 20 #include "hw/fw-path-provider.h" 21 22 const char *qdev_fw_name(DeviceState *dev) 23 { 24 DeviceClass *dc = DEVICE_GET_CLASS(dev); 25 26 if (dc->fw_name) { 27 return dc->fw_name; 28 } 29 30 return object_get_typename(OBJECT(dev)); 31 } 32 33 static char *bus_get_fw_dev_path(BusState *bus, DeviceState *dev) 34 { 35 BusClass *bc = BUS_GET_CLASS(bus); 36 37 if (bc->get_fw_dev_path) { 38 return bc->get_fw_dev_path(dev); 39 } 40 41 return NULL; 42 } 43 44 static char *qdev_get_fw_dev_path_from_handler(BusState *bus, DeviceState *dev) 45 { 46 Object *obj = OBJECT(dev); 47 char *d = NULL; 48 49 while (!d && obj->parent) { 50 obj = obj->parent; 51 d = fw_path_provider_try_get_dev_path(obj, bus, dev); 52 } 53 return d; 54 } 55 56 char *qdev_get_own_fw_dev_path_from_handler(BusState *bus, DeviceState *dev) 57 { 58 Object *obj = OBJECT(dev); 59 60 return fw_path_provider_try_get_dev_path(obj, bus, dev); 61 } 62 63 static int qdev_get_fw_dev_path_helper(DeviceState *dev, char *p, int size) 64 { 65 int l = 0; 66 67 if (dev && dev->parent_bus) { 68 char *d; 69 l = qdev_get_fw_dev_path_helper(dev->parent_bus->parent, p, size); 70 d = qdev_get_fw_dev_path_from_handler(dev->parent_bus, dev); 71 if (!d) { 72 d = bus_get_fw_dev_path(dev->parent_bus, dev); 73 } 74 if (d) { 75 l += snprintf(p + l, size - l, "%s", d); 76 g_free(d); 77 } else { 78 return l; 79 } 80 } 81 l += snprintf(p + l , size - l, "/"); 82 83 return l; 84 } 85 86 char *qdev_get_fw_dev_path(DeviceState *dev) 87 { 88 char path[128]; 89 int l; 90 91 l = qdev_get_fw_dev_path_helper(dev, path, 128); 92 93 path[l - 1] = '\0'; 94 95 return g_strdup(path); 96 } 97