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/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 }