meson: convert hw/vfio
[qemu.git] / hw / core / qdev-fw.c
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/fw-path-provider.h"
20 #include "hw/qdev-core.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 }