LXR qemu/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
  22const 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
  33static 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
  44static 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
  56char *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
  63static 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
  86char *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