qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
Log | Files | Refs | Submodules | LICENSE

qdev-fw.c (2398B)

      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 }