root / hw / qdev.c @ 30fbb9fc
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/*
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* Dynamic device configuration and creation.
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*
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* Copyright (c) 2009 CodeSourcery
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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/* The theory here is that it should be possible to create a machine without
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knowledge of specific devices. Historically board init routines have
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passed a bunch of arguments to each device, requiring the board know
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exactly which device it is dealing with. This file provides an abstract
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API for device configuration and initialization. Devices will generally
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inherit from a particular bus (e.g. PCI or I2C) rather than
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this API directly. */
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#include "net.h" |
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#include "qdev.h" |
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#include "sysemu.h" |
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#include "monitor.h" |
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static int qdev_hotplug = 0; |
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static bool qdev_hot_added = false; |
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static bool qdev_hot_removed = false; |
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/* This is a nasty hack to allow passing a NULL bus to qdev_create. */
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static BusState *main_system_bus;
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static void main_system_bus_create(void); |
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DeviceInfo *device_info_list; |
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|
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static BusState *qbus_find_recursive(BusState *bus, const char *name, |
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const BusInfo *info);
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static BusState *qbus_find(const char *path); |
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/* Register a new device type. */
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static void qdev_subclass_init(ObjectClass *klass, void *data) |
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{
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DeviceClass *dc = DEVICE_CLASS(klass); |
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dc->info = data; |
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} |
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|
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DeviceInfo *qdev_get_info(DeviceState *dev) |
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{
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return DEVICE_GET_CLASS(dev)->info;
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} |
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void qdev_register(DeviceInfo *info)
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{
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TypeInfo type_info = {};
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assert(info->size >= sizeof(DeviceState));
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assert(!info->next); |
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type_info.name = info->name; |
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type_info.parent = TYPE_DEVICE; |
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type_info.instance_size = info->size; |
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type_info.class_init = qdev_subclass_init; |
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type_info.class_data = info; |
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type_register_static(&type_info); |
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info->next = device_info_list; |
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device_info_list = info; |
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} |
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static DeviceInfo *qdev_find_info(BusInfo *bus_info, const char *name) |
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{
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DeviceInfo *info; |
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|
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/* first check device names */
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for (info = device_info_list; info != NULL; info = info->next) { |
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if (bus_info && info->bus_info != bus_info)
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continue;
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if (strcmp(info->name, name) != 0) |
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continue;
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return info;
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} |
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|
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/* failing that check the aliases */
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for (info = device_info_list; info != NULL; info = info->next) { |
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if (bus_info && info->bus_info != bus_info)
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continue;
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if (!info->alias)
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continue;
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if (strcmp(info->alias, name) != 0) |
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continue;
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return info;
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} |
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return NULL; |
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} |
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bool qdev_exists(const char *name) |
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{
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return !!qdev_find_info(NULL, name); |
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} |
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static void qdev_property_add_legacy(DeviceState *dev, Property *prop, |
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Error **errp); |
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static DeviceState *qdev_create_from_info(BusState *bus, DeviceInfo *info)
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{
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DeviceState *dev; |
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Property *prop; |
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assert(bus->info == info->bus_info); |
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dev = DEVICE(object_new(info->name)); |
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dev->parent_bus = bus; |
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qdev_prop_set_defaults(dev, qdev_get_info(dev)->props); |
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qdev_prop_set_defaults(dev, dev->parent_bus->info->props); |
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qdev_prop_set_globals(dev); |
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QTAILQ_INSERT_HEAD(&bus->children, dev, sibling); |
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if (qdev_hotplug) {
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assert(bus->allow_hotplug); |
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dev->hotplugged = 1;
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qdev_hot_added = true;
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} |
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dev->instance_id_alias = -1;
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QTAILQ_INIT(&dev->properties); |
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dev->state = DEV_STATE_CREATED; |
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for (prop = qdev_get_info(dev)->props; prop && prop->name; prop++) {
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qdev_property_add_legacy(dev, prop, NULL);
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qdev_property_add_static(dev, prop, NULL);
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} |
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for (prop = qdev_get_info(dev)->bus_info->props; prop && prop->name; prop++) {
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qdev_property_add_legacy(dev, prop, NULL);
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qdev_property_add_static(dev, prop, NULL);
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} |
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qdev_property_add_str(dev, "type", qdev_get_type, NULL, NULL); |
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return dev;
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} |
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/* Create a new device. This only initializes the device state structure
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and allows properties to be set. qdev_init should be called to
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initialize the actual device emulation. */
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DeviceState *qdev_create(BusState *bus, const char *name) |
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{
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DeviceState *dev; |
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dev = qdev_try_create(bus, name); |
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if (!dev) {
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if (bus) {
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hw_error("Unknown device '%s' for bus '%s'\n", name,
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bus->info->name); |
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} else {
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hw_error("Unknown device '%s' for default sysbus\n", name);
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} |
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} |
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return dev;
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} |
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DeviceState *qdev_try_create(BusState *bus, const char *name) |
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{
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DeviceInfo *info; |
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if (!bus) {
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bus = sysbus_get_default(); |
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} |
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info = qdev_find_info(bus->info, name); |
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if (!info) {
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return NULL; |
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} |
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return qdev_create_from_info(bus, info);
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} |
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static void qdev_print_devinfo(DeviceInfo *info) |
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{
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error_printf("name \"%s\", bus %s",
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info->name, info->bus_info->name); |
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if (info->alias) {
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error_printf(", alias \"%s\"", info->alias);
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} |
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if (info->desc) {
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error_printf(", desc \"%s\"", info->desc);
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} |
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if (info->no_user) {
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error_printf(", no-user");
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} |
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error_printf("\n");
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} |
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static int set_property(const char *name, const char *value, void *opaque) |
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{
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DeviceState *dev = opaque; |
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if (strcmp(name, "driver") == 0) |
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return 0; |
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if (strcmp(name, "bus") == 0) |
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return 0; |
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if (qdev_prop_parse(dev, name, value) == -1) { |
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return -1; |
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} |
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return 0; |
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} |
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int qdev_device_help(QemuOpts *opts)
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{
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const char *driver; |
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DeviceInfo *info; |
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Property *prop; |
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driver = qemu_opt_get(opts, "driver");
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if (driver && !strcmp(driver, "?")) { |
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for (info = device_info_list; info != NULL; info = info->next) { |
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if (info->no_user) {
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continue; /* not available, don't show */ |
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} |
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qdev_print_devinfo(info); |
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} |
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return 1; |
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} |
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if (!driver || !qemu_opt_get(opts, "?")) { |
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return 0; |
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} |
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info = qdev_find_info(NULL, driver);
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if (!info) {
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return 0; |
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} |
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for (prop = info->props; prop && prop->name; prop++) {
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/*
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* TODO Properties without a parser are just for dirty hacks.
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* qdev_prop_ptr is the only such PropertyInfo. It's marked
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* for removal. This conditional should be removed along with
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* it.
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*/
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if (!prop->info->parse) {
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continue; /* no way to set it, don't show */ |
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} |
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error_printf("%s.%s=%s\n", info->name, prop->name,
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prop->info->legacy_name ?: prop->info->name); |
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} |
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for (prop = info->bus_info->props; prop && prop->name; prop++) {
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if (!prop->info->parse) {
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continue; /* no way to set it, don't show */ |
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} |
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error_printf("%s.%s=%s\n", info->name, prop->name,
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prop->info->legacy_name ?: prop->info->name); |
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} |
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return 1; |
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} |
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static DeviceState *qdev_get_peripheral(void) |
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{
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static DeviceState *dev;
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if (dev == NULL) { |
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dev = qdev_create(NULL, "container"); |
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qdev_property_add_child(qdev_get_root(), "peripheral", dev, NULL); |
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qdev_init_nofail(dev); |
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} |
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return dev;
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} |
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static DeviceState *qdev_get_peripheral_anon(void) |
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{
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static DeviceState *dev;
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|
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if (dev == NULL) { |
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dev = qdev_create(NULL, "container"); |
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qdev_property_add_child(qdev_get_root(), "peripheral-anon", dev, NULL); |
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qdev_init_nofail(dev); |
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} |
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return dev;
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} |
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DeviceState *qdev_device_add(QemuOpts *opts) |
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{
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const char *driver, *path, *id; |
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DeviceInfo *info; |
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DeviceState *qdev; |
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BusState *bus; |
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driver = qemu_opt_get(opts, "driver");
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if (!driver) {
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qerror_report(QERR_MISSING_PARAMETER, "driver");
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return NULL; |
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} |
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/* find driver */
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info = qdev_find_info(NULL, driver);
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if (!info || info->no_user) {
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qerror_report(QERR_INVALID_PARAMETER_VALUE, "driver", "a driver name"); |
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error_printf_unless_qmp("Try with argument '?' for a list.\n");
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return NULL; |
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} |
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/* find bus */
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path = qemu_opt_get(opts, "bus");
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if (path != NULL) { |
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bus = qbus_find(path); |
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if (!bus) {
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return NULL; |
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} |
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if (bus->info != info->bus_info) {
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qerror_report(QERR_BAD_BUS_FOR_DEVICE, |
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driver, bus->info->name); |
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return NULL; |
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} |
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} else {
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bus = qbus_find_recursive(main_system_bus, NULL, info->bus_info);
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if (!bus) {
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qerror_report(QERR_NO_BUS_FOR_DEVICE, |
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info->name, info->bus_info->name); |
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return NULL; |
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} |
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} |
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if (qdev_hotplug && !bus->allow_hotplug) {
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qerror_report(QERR_BUS_NO_HOTPLUG, bus->name); |
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return NULL; |
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} |
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|
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/* create device, set properties */
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qdev = qdev_create_from_info(bus, info); |
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id = qemu_opts_id(opts); |
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if (id) {
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qdev->id = id; |
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qdev_property_add_child(qdev_get_peripheral(), qdev->id, qdev, NULL);
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} else {
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static int anon_count; |
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gchar *name = g_strdup_printf("device[%d]", anon_count++);
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qdev_property_add_child(qdev_get_peripheral_anon(), name, |
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qdev, NULL);
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g_free(name); |
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} |
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if (qemu_opt_foreach(opts, set_property, qdev, 1) != 0) { |
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qdev_free(qdev); |
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return NULL; |
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} |
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if (qdev_init(qdev) < 0) { |
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qerror_report(QERR_DEVICE_INIT_FAILED, driver); |
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return NULL; |
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} |
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qdev->opts = opts; |
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return qdev;
|
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} |
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|
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/* Initialize a device. Device properties should be set before calling
|
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this function. IRQs and MMIO regions should be connected/mapped after
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calling this function.
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On failure, destroy the device and return negative value.
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Return 0 on success. */
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int qdev_init(DeviceState *dev)
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{
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int rc;
|
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assert(dev->state == DEV_STATE_CREATED); |
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rc = qdev_get_info(dev)->init(dev, qdev_get_info(dev)); |
| 371 |
if (rc < 0) { |
| 372 |
qdev_free(dev); |
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return rc;
|
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} |
| 375 |
if (qdev_get_info(dev)->vmsd) {
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vmstate_register_with_alias_id(dev, -1, qdev_get_info(dev)->vmsd, dev,
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dev->instance_id_alias, |
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dev->alias_required_for_version); |
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} |
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dev->state = DEV_STATE_INITIALIZED; |
| 381 |
if (dev->hotplugged && qdev_get_info(dev)->reset) {
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qdev_get_info(dev)->reset(dev); |
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} |
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return 0; |
| 385 |
} |
| 386 |
|
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void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id, |
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int required_for_version)
|
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{
|
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assert(dev->state == DEV_STATE_CREATED); |
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dev->instance_id_alias = alias_id; |
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dev->alias_required_for_version = required_for_version; |
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} |
| 394 |
|
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int qdev_unplug(DeviceState *dev)
|
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{
|
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if (!dev->parent_bus->allow_hotplug) {
|
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qerror_report(QERR_BUS_NO_HOTPLUG, dev->parent_bus->name); |
| 399 |
return -1; |
| 400 |
} |
| 401 |
assert(qdev_get_info(dev)->unplug != NULL);
|
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|
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qdev_hot_removed = true;
|
| 404 |
|
| 405 |
return qdev_get_info(dev)->unplug(dev);
|
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} |
| 407 |
|
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static int qdev_reset_one(DeviceState *dev, void *opaque) |
| 409 |
{
|
| 410 |
if (qdev_get_info(dev)->reset) {
|
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qdev_get_info(dev)->reset(dev); |
| 412 |
} |
| 413 |
|
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return 0; |
| 415 |
} |
| 416 |
|
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BusState *sysbus_get_default(void)
|
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{
|
| 419 |
if (!main_system_bus) {
|
| 420 |
main_system_bus_create(); |
| 421 |
} |
| 422 |
return main_system_bus;
|
| 423 |
} |
| 424 |
|
| 425 |
static int qbus_reset_one(BusState *bus, void *opaque) |
| 426 |
{
|
| 427 |
if (bus->info->reset) {
|
| 428 |
return bus->info->reset(bus);
|
| 429 |
} |
| 430 |
return 0; |
| 431 |
} |
| 432 |
|
| 433 |
void qdev_reset_all(DeviceState *dev)
|
| 434 |
{
|
| 435 |
qdev_walk_children(dev, qdev_reset_one, qbus_reset_one, NULL);
|
| 436 |
} |
| 437 |
|
| 438 |
void qbus_reset_all_fn(void *opaque) |
| 439 |
{
|
| 440 |
BusState *bus = opaque; |
| 441 |
qbus_walk_children(bus, qdev_reset_one, qbus_reset_one, NULL);
|
| 442 |
} |
| 443 |
|
| 444 |
/* can be used as ->unplug() callback for the simple cases */
|
| 445 |
int qdev_simple_unplug_cb(DeviceState *dev)
|
| 446 |
{
|
| 447 |
/* just zap it */
|
| 448 |
qdev_free(dev); |
| 449 |
return 0; |
| 450 |
} |
| 451 |
|
| 452 |
|
| 453 |
/* Like qdev_init(), but terminate program via error_report() instead of
|
| 454 |
returning an error value. This is okay during machine creation.
|
| 455 |
Don't use for hotplug, because there callers need to recover from
|
| 456 |
failure. Exception: if you know the device's init() callback can't
|
| 457 |
fail, then qdev_init_nofail() can't fail either, and is therefore
|
| 458 |
usable even then. But relying on the device implementation that
|
| 459 |
way is somewhat unclean, and best avoided. */
|
| 460 |
void qdev_init_nofail(DeviceState *dev)
|
| 461 |
{
|
| 462 |
DeviceInfo *info = qdev_get_info(dev); |
| 463 |
|
| 464 |
if (qdev_init(dev) < 0) { |
| 465 |
error_report("Initialization of device %s failed", info->name);
|
| 466 |
exit(1);
|
| 467 |
} |
| 468 |
} |
| 469 |
|
| 470 |
static void qdev_property_del_all(DeviceState *dev) |
| 471 |
{
|
| 472 |
while (!QTAILQ_EMPTY(&dev->properties)) {
|
| 473 |
DeviceProperty *prop = QTAILQ_FIRST(&dev->properties); |
| 474 |
|
| 475 |
QTAILQ_REMOVE(&dev->properties, prop, node); |
| 476 |
|
| 477 |
if (prop->release) {
|
| 478 |
prop->release(dev, prop->name, prop->opaque); |
| 479 |
} |
| 480 |
|
| 481 |
g_free(prop->name); |
| 482 |
g_free(prop->type); |
| 483 |
g_free(prop); |
| 484 |
} |
| 485 |
} |
| 486 |
|
| 487 |
static void qdev_property_del_child(DeviceState *dev, DeviceState *child, Error **errp) |
| 488 |
{
|
| 489 |
DeviceProperty *prop; |
| 490 |
|
| 491 |
QTAILQ_FOREACH(prop, &dev->properties, node) {
|
| 492 |
if (strstart(prop->type, "child<", NULL) && prop->opaque == child) { |
| 493 |
break;
|
| 494 |
} |
| 495 |
} |
| 496 |
|
| 497 |
g_assert(prop != NULL);
|
| 498 |
|
| 499 |
QTAILQ_REMOVE(&dev->properties, prop, node); |
| 500 |
|
| 501 |
if (prop->release) {
|
| 502 |
prop->release(dev, prop->name, prop->opaque); |
| 503 |
} |
| 504 |
|
| 505 |
g_free(prop->name); |
| 506 |
g_free(prop->type); |
| 507 |
g_free(prop); |
| 508 |
} |
| 509 |
|
| 510 |
/* Unlink device from bus and free the structure. */
|
| 511 |
void qdev_free(DeviceState *dev)
|
| 512 |
{
|
| 513 |
BusState *bus; |
| 514 |
Property *prop; |
| 515 |
|
| 516 |
qdev_property_del_all(dev); |
| 517 |
|
| 518 |
if (dev->state == DEV_STATE_INITIALIZED) {
|
| 519 |
while (dev->num_child_bus) {
|
| 520 |
bus = QLIST_FIRST(&dev->child_bus); |
| 521 |
qbus_free(bus); |
| 522 |
} |
| 523 |
if (qdev_get_info(dev)->vmsd)
|
| 524 |
vmstate_unregister(dev, qdev_get_info(dev)->vmsd, dev); |
| 525 |
if (qdev_get_info(dev)->exit)
|
| 526 |
qdev_get_info(dev)->exit(dev); |
| 527 |
if (dev->opts)
|
| 528 |
qemu_opts_del(dev->opts); |
| 529 |
} |
| 530 |
QTAILQ_REMOVE(&dev->parent_bus->children, dev, sibling); |
| 531 |
for (prop = qdev_get_info(dev)->props; prop && prop->name; prop++) {
|
| 532 |
if (prop->info->free) {
|
| 533 |
prop->info->free(dev, prop); |
| 534 |
} |
| 535 |
} |
| 536 |
if (dev->parent) {
|
| 537 |
qdev_property_del_child(dev->parent, dev, NULL);
|
| 538 |
} |
| 539 |
if (dev->ref != 0) { |
| 540 |
qerror_report(QERR_DEVICE_IN_USE, dev->id?:"");
|
| 541 |
} |
| 542 |
object_delete(OBJECT(dev)); |
| 543 |
} |
| 544 |
|
| 545 |
void qdev_machine_creation_done(void) |
| 546 |
{
|
| 547 |
/*
|
| 548 |
* ok, initial machine setup is done, starting from now we can
|
| 549 |
* only create hotpluggable devices
|
| 550 |
*/
|
| 551 |
qdev_hotplug = 1;
|
| 552 |
} |
| 553 |
|
| 554 |
bool qdev_machine_modified(void) |
| 555 |
{
|
| 556 |
return qdev_hot_added || qdev_hot_removed;
|
| 557 |
} |
| 558 |
|
| 559 |
/* Get a character (serial) device interface. */
|
| 560 |
CharDriverState *qdev_init_chardev(DeviceState *dev) |
| 561 |
{
|
| 562 |
static int next_serial; |
| 563 |
|
| 564 |
/* FIXME: This function needs to go away: use chardev properties! */
|
| 565 |
return serial_hds[next_serial++];
|
| 566 |
} |
| 567 |
|
| 568 |
BusState *qdev_get_parent_bus(DeviceState *dev) |
| 569 |
{
|
| 570 |
return dev->parent_bus;
|
| 571 |
} |
| 572 |
|
| 573 |
void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n) |
| 574 |
{
|
| 575 |
assert(dev->num_gpio_in == 0);
|
| 576 |
dev->num_gpio_in = n; |
| 577 |
dev->gpio_in = qemu_allocate_irqs(handler, dev, n); |
| 578 |
} |
| 579 |
|
| 580 |
void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n) |
| 581 |
{
|
| 582 |
assert(dev->num_gpio_out == 0);
|
| 583 |
dev->num_gpio_out = n; |
| 584 |
dev->gpio_out = pins; |
| 585 |
} |
| 586 |
|
| 587 |
qemu_irq qdev_get_gpio_in(DeviceState *dev, int n)
|
| 588 |
{
|
| 589 |
assert(n >= 0 && n < dev->num_gpio_in);
|
| 590 |
return dev->gpio_in[n];
|
| 591 |
} |
| 592 |
|
| 593 |
void qdev_connect_gpio_out(DeviceState * dev, int n, qemu_irq pin) |
| 594 |
{
|
| 595 |
assert(n >= 0 && n < dev->num_gpio_out);
|
| 596 |
dev->gpio_out[n] = pin; |
| 597 |
} |
| 598 |
|
| 599 |
void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd)
|
| 600 |
{
|
| 601 |
qdev_prop_set_macaddr(dev, "mac", nd->macaddr.a);
|
| 602 |
if (nd->vlan)
|
| 603 |
qdev_prop_set_vlan(dev, "vlan", nd->vlan);
|
| 604 |
if (nd->netdev)
|
| 605 |
qdev_prop_set_netdev(dev, "netdev", nd->netdev);
|
| 606 |
if (nd->nvectors != DEV_NVECTORS_UNSPECIFIED &&
|
| 607 |
qdev_prop_exists(dev, "vectors")) {
|
| 608 |
qdev_prop_set_uint32(dev, "vectors", nd->nvectors);
|
| 609 |
} |
| 610 |
nd->instantiated = 1;
|
| 611 |
} |
| 612 |
|
| 613 |
BusState *qdev_get_child_bus(DeviceState *dev, const char *name) |
| 614 |
{
|
| 615 |
BusState *bus; |
| 616 |
|
| 617 |
QLIST_FOREACH(bus, &dev->child_bus, sibling) {
|
| 618 |
if (strcmp(name, bus->name) == 0) { |
| 619 |
return bus;
|
| 620 |
} |
| 621 |
} |
| 622 |
return NULL; |
| 623 |
} |
| 624 |
|
| 625 |
int qbus_walk_children(BusState *bus, qdev_walkerfn *devfn,
|
| 626 |
qbus_walkerfn *busfn, void *opaque)
|
| 627 |
{
|
| 628 |
DeviceState *dev; |
| 629 |
int err;
|
| 630 |
|
| 631 |
if (busfn) {
|
| 632 |
err = busfn(bus, opaque); |
| 633 |
if (err) {
|
| 634 |
return err;
|
| 635 |
} |
| 636 |
} |
| 637 |
|
| 638 |
QTAILQ_FOREACH(dev, &bus->children, sibling) {
|
| 639 |
err = qdev_walk_children(dev, devfn, busfn, opaque); |
| 640 |
if (err < 0) { |
| 641 |
return err;
|
| 642 |
} |
| 643 |
} |
| 644 |
|
| 645 |
return 0; |
| 646 |
} |
| 647 |
|
| 648 |
int qdev_walk_children(DeviceState *dev, qdev_walkerfn *devfn,
|
| 649 |
qbus_walkerfn *busfn, void *opaque)
|
| 650 |
{
|
| 651 |
BusState *bus; |
| 652 |
int err;
|
| 653 |
|
| 654 |
if (devfn) {
|
| 655 |
err = devfn(dev, opaque); |
| 656 |
if (err) {
|
| 657 |
return err;
|
| 658 |
} |
| 659 |
} |
| 660 |
|
| 661 |
QLIST_FOREACH(bus, &dev->child_bus, sibling) {
|
| 662 |
err = qbus_walk_children(bus, devfn, busfn, opaque); |
| 663 |
if (err < 0) { |
| 664 |
return err;
|
| 665 |
} |
| 666 |
} |
| 667 |
|
| 668 |
return 0; |
| 669 |
} |
| 670 |
|
| 671 |
static BusState *qbus_find_recursive(BusState *bus, const char *name, |
| 672 |
const BusInfo *info)
|
| 673 |
{
|
| 674 |
DeviceState *dev; |
| 675 |
BusState *child, *ret; |
| 676 |
int match = 1; |
| 677 |
|
| 678 |
if (name && (strcmp(bus->name, name) != 0)) { |
| 679 |
match = 0;
|
| 680 |
} |
| 681 |
if (info && (bus->info != info)) {
|
| 682 |
match = 0;
|
| 683 |
} |
| 684 |
if (match) {
|
| 685 |
return bus;
|
| 686 |
} |
| 687 |
|
| 688 |
QTAILQ_FOREACH(dev, &bus->children, sibling) {
|
| 689 |
QLIST_FOREACH(child, &dev->child_bus, sibling) {
|
| 690 |
ret = qbus_find_recursive(child, name, info); |
| 691 |
if (ret) {
|
| 692 |
return ret;
|
| 693 |
} |
| 694 |
} |
| 695 |
} |
| 696 |
return NULL; |
| 697 |
} |
| 698 |
|
| 699 |
DeviceState *qdev_find_recursive(BusState *bus, const char *id) |
| 700 |
{
|
| 701 |
DeviceState *dev, *ret; |
| 702 |
BusState *child; |
| 703 |
|
| 704 |
QTAILQ_FOREACH(dev, &bus->children, sibling) {
|
| 705 |
if (dev->id && strcmp(dev->id, id) == 0) |
| 706 |
return dev;
|
| 707 |
QLIST_FOREACH(child, &dev->child_bus, sibling) {
|
| 708 |
ret = qdev_find_recursive(child, id); |
| 709 |
if (ret) {
|
| 710 |
return ret;
|
| 711 |
} |
| 712 |
} |
| 713 |
} |
| 714 |
return NULL; |
| 715 |
} |
| 716 |
|
| 717 |
static void qbus_list_bus(DeviceState *dev) |
| 718 |
{
|
| 719 |
BusState *child; |
| 720 |
const char *sep = " "; |
| 721 |
|
| 722 |
error_printf("child busses at \"%s\":",
|
| 723 |
dev->id ? dev->id : qdev_get_info(dev)->name); |
| 724 |
QLIST_FOREACH(child, &dev->child_bus, sibling) {
|
| 725 |
error_printf("%s\"%s\"", sep, child->name);
|
| 726 |
sep = ", ";
|
| 727 |
} |
| 728 |
error_printf("\n");
|
| 729 |
} |
| 730 |
|
| 731 |
static void qbus_list_dev(BusState *bus) |
| 732 |
{
|
| 733 |
DeviceState *dev; |
| 734 |
const char *sep = " "; |
| 735 |
|
| 736 |
error_printf("devices at \"%s\":", bus->name);
|
| 737 |
QTAILQ_FOREACH(dev, &bus->children, sibling) {
|
| 738 |
error_printf("%s\"%s\"", sep, qdev_get_info(dev)->name);
|
| 739 |
if (dev->id)
|
| 740 |
error_printf("/\"%s\"", dev->id);
|
| 741 |
sep = ", ";
|
| 742 |
} |
| 743 |
error_printf("\n");
|
| 744 |
} |
| 745 |
|
| 746 |
static BusState *qbus_find_bus(DeviceState *dev, char *elem) |
| 747 |
{
|
| 748 |
BusState *child; |
| 749 |
|
| 750 |
QLIST_FOREACH(child, &dev->child_bus, sibling) {
|
| 751 |
if (strcmp(child->name, elem) == 0) { |
| 752 |
return child;
|
| 753 |
} |
| 754 |
} |
| 755 |
return NULL; |
| 756 |
} |
| 757 |
|
| 758 |
static DeviceState *qbus_find_dev(BusState *bus, char *elem) |
| 759 |
{
|
| 760 |
DeviceState *dev; |
| 761 |
|
| 762 |
/*
|
| 763 |
* try to match in order:
|
| 764 |
* (1) instance id, if present
|
| 765 |
* (2) driver name
|
| 766 |
* (3) driver alias, if present
|
| 767 |
*/
|
| 768 |
QTAILQ_FOREACH(dev, &bus->children, sibling) {
|
| 769 |
if (dev->id && strcmp(dev->id, elem) == 0) { |
| 770 |
return dev;
|
| 771 |
} |
| 772 |
} |
| 773 |
QTAILQ_FOREACH(dev, &bus->children, sibling) {
|
| 774 |
if (strcmp(qdev_get_info(dev)->name, elem) == 0) { |
| 775 |
return dev;
|
| 776 |
} |
| 777 |
} |
| 778 |
QTAILQ_FOREACH(dev, &bus->children, sibling) {
|
| 779 |
if (qdev_get_info(dev)->alias && strcmp(qdev_get_info(dev)->alias, elem) == 0) { |
| 780 |
return dev;
|
| 781 |
} |
| 782 |
} |
| 783 |
return NULL; |
| 784 |
} |
| 785 |
|
| 786 |
static BusState *qbus_find(const char *path) |
| 787 |
{
|
| 788 |
DeviceState *dev; |
| 789 |
BusState *bus; |
| 790 |
char elem[128]; |
| 791 |
int pos, len;
|
| 792 |
|
| 793 |
/* find start element */
|
| 794 |
if (path[0] == '/') { |
| 795 |
bus = main_system_bus; |
| 796 |
pos = 0;
|
| 797 |
} else {
|
| 798 |
if (sscanf(path, "%127[^/]%n", elem, &len) != 1) { |
| 799 |
assert(!path[0]);
|
| 800 |
elem[0] = len = 0; |
| 801 |
} |
| 802 |
bus = qbus_find_recursive(main_system_bus, elem, NULL);
|
| 803 |
if (!bus) {
|
| 804 |
qerror_report(QERR_BUS_NOT_FOUND, elem); |
| 805 |
return NULL; |
| 806 |
} |
| 807 |
pos = len; |
| 808 |
} |
| 809 |
|
| 810 |
for (;;) {
|
| 811 |
assert(path[pos] == '/' || !path[pos]);
|
| 812 |
while (path[pos] == '/') { |
| 813 |
pos++; |
| 814 |
} |
| 815 |
if (path[pos] == '\0') { |
| 816 |
return bus;
|
| 817 |
} |
| 818 |
|
| 819 |
/* find device */
|
| 820 |
if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) { |
| 821 |
assert(0);
|
| 822 |
elem[0] = len = 0; |
| 823 |
} |
| 824 |
pos += len; |
| 825 |
dev = qbus_find_dev(bus, elem); |
| 826 |
if (!dev) {
|
| 827 |
qerror_report(QERR_DEVICE_NOT_FOUND, elem); |
| 828 |
if (!monitor_cur_is_qmp()) {
|
| 829 |
qbus_list_dev(bus); |
| 830 |
} |
| 831 |
return NULL; |
| 832 |
} |
| 833 |
|
| 834 |
assert(path[pos] == '/' || !path[pos]);
|
| 835 |
while (path[pos] == '/') { |
| 836 |
pos++; |
| 837 |
} |
| 838 |
if (path[pos] == '\0') { |
| 839 |
/* last specified element is a device. If it has exactly
|
| 840 |
* one child bus accept it nevertheless */
|
| 841 |
switch (dev->num_child_bus) {
|
| 842 |
case 0: |
| 843 |
qerror_report(QERR_DEVICE_NO_BUS, elem); |
| 844 |
return NULL; |
| 845 |
case 1: |
| 846 |
return QLIST_FIRST(&dev->child_bus);
|
| 847 |
default:
|
| 848 |
qerror_report(QERR_DEVICE_MULTIPLE_BUSSES, elem); |
| 849 |
if (!monitor_cur_is_qmp()) {
|
| 850 |
qbus_list_bus(dev); |
| 851 |
} |
| 852 |
return NULL; |
| 853 |
} |
| 854 |
} |
| 855 |
|
| 856 |
/* find bus */
|
| 857 |
if (sscanf(path+pos, "%127[^/]%n", elem, &len) != 1) { |
| 858 |
assert(0);
|
| 859 |
elem[0] = len = 0; |
| 860 |
} |
| 861 |
pos += len; |
| 862 |
bus = qbus_find_bus(dev, elem); |
| 863 |
if (!bus) {
|
| 864 |
qerror_report(QERR_BUS_NOT_FOUND, elem); |
| 865 |
if (!monitor_cur_is_qmp()) {
|
| 866 |
qbus_list_bus(dev); |
| 867 |
} |
| 868 |
return NULL; |
| 869 |
} |
| 870 |
} |
| 871 |
} |
| 872 |
|
| 873 |
void qbus_create_inplace(BusState *bus, BusInfo *info,
|
| 874 |
DeviceState *parent, const char *name) |
| 875 |
{
|
| 876 |
char *buf;
|
| 877 |
int i,len;
|
| 878 |
|
| 879 |
bus->info = info; |
| 880 |
bus->parent = parent; |
| 881 |
|
| 882 |
if (name) {
|
| 883 |
/* use supplied name */
|
| 884 |
bus->name = g_strdup(name); |
| 885 |
} else if (parent && parent->id) { |
| 886 |
/* parent device has id -> use it for bus name */
|
| 887 |
len = strlen(parent->id) + 16;
|
| 888 |
buf = g_malloc(len); |
| 889 |
snprintf(buf, len, "%s.%d", parent->id, parent->num_child_bus);
|
| 890 |
bus->name = buf; |
| 891 |
} else {
|
| 892 |
/* no id -> use lowercase bus type for bus name */
|
| 893 |
len = strlen(info->name) + 16;
|
| 894 |
buf = g_malloc(len); |
| 895 |
len = snprintf(buf, len, "%s.%d", info->name,
|
| 896 |
parent ? parent->num_child_bus : 0);
|
| 897 |
for (i = 0; i < len; i++) |
| 898 |
buf[i] = qemu_tolower(buf[i]); |
| 899 |
bus->name = buf; |
| 900 |
} |
| 901 |
|
| 902 |
QTAILQ_INIT(&bus->children); |
| 903 |
if (parent) {
|
| 904 |
QLIST_INSERT_HEAD(&parent->child_bus, bus, sibling); |
| 905 |
parent->num_child_bus++; |
| 906 |
} else if (bus != main_system_bus) { |
| 907 |
/* TODO: once all bus devices are qdevified,
|
| 908 |
only reset handler for main_system_bus should be registered here. */
|
| 909 |
qemu_register_reset(qbus_reset_all_fn, bus); |
| 910 |
} |
| 911 |
} |
| 912 |
|
| 913 |
BusState *qbus_create(BusInfo *info, DeviceState *parent, const char *name) |
| 914 |
{
|
| 915 |
BusState *bus; |
| 916 |
|
| 917 |
bus = g_malloc0(info->size); |
| 918 |
bus->qdev_allocated = 1;
|
| 919 |
qbus_create_inplace(bus, info, parent, name); |
| 920 |
return bus;
|
| 921 |
} |
| 922 |
|
| 923 |
static void main_system_bus_create(void) |
| 924 |
{
|
| 925 |
/* assign main_system_bus before qbus_create_inplace()
|
| 926 |
* in order to make "if (bus != main_system_bus)" work */
|
| 927 |
main_system_bus = g_malloc0(system_bus_info.size); |
| 928 |
main_system_bus->qdev_allocated = 1;
|
| 929 |
qbus_create_inplace(main_system_bus, &system_bus_info, NULL,
|
| 930 |
"main-system-bus");
|
| 931 |
} |
| 932 |
|
| 933 |
void qbus_free(BusState *bus)
|
| 934 |
{
|
| 935 |
DeviceState *dev; |
| 936 |
|
| 937 |
while ((dev = QTAILQ_FIRST(&bus->children)) != NULL) { |
| 938 |
qdev_free(dev); |
| 939 |
} |
| 940 |
if (bus->parent) {
|
| 941 |
QLIST_REMOVE(bus, sibling); |
| 942 |
bus->parent->num_child_bus--; |
| 943 |
} else {
|
| 944 |
assert(bus != main_system_bus); /* main_system_bus is never freed */
|
| 945 |
qemu_unregister_reset(qbus_reset_all_fn, bus); |
| 946 |
} |
| 947 |
g_free((void*)bus->name);
|
| 948 |
if (bus->qdev_allocated) {
|
| 949 |
g_free(bus); |
| 950 |
} |
| 951 |
} |
| 952 |
|
| 953 |
#define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__) |
| 954 |
static void qbus_print(Monitor *mon, BusState *bus, int indent); |
| 955 |
|
| 956 |
static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props, |
| 957 |
const char *prefix, int indent) |
| 958 |
{
|
| 959 |
char buf[64]; |
| 960 |
|
| 961 |
if (!props)
|
| 962 |
return;
|
| 963 |
while (props->name) {
|
| 964 |
/*
|
| 965 |
* TODO Properties without a print method are just for dirty
|
| 966 |
* hacks. qdev_prop_ptr is the only such PropertyInfo. It's
|
| 967 |
* marked for removal. The test props->info->print should be
|
| 968 |
* removed along with it.
|
| 969 |
*/
|
| 970 |
if (props->info->print) {
|
| 971 |
props->info->print(dev, props, buf, sizeof(buf));
|
| 972 |
qdev_printf("%s-prop: %s = %s\n", prefix, props->name, buf);
|
| 973 |
} |
| 974 |
props++; |
| 975 |
} |
| 976 |
} |
| 977 |
|
| 978 |
static void qdev_print(Monitor *mon, DeviceState *dev, int indent) |
| 979 |
{
|
| 980 |
BusState *child; |
| 981 |
qdev_printf("dev: %s, id \"%s\"\n", qdev_get_info(dev)->name,
|
| 982 |
dev->id ? dev->id : "");
|
| 983 |
indent += 2;
|
| 984 |
if (dev->num_gpio_in) {
|
| 985 |
qdev_printf("gpio-in %d\n", dev->num_gpio_in);
|
| 986 |
} |
| 987 |
if (dev->num_gpio_out) {
|
| 988 |
qdev_printf("gpio-out %d\n", dev->num_gpio_out);
|
| 989 |
} |
| 990 |
qdev_print_props(mon, dev, qdev_get_info(dev)->props, "dev", indent);
|
| 991 |
qdev_print_props(mon, dev, dev->parent_bus->info->props, "bus", indent);
|
| 992 |
if (dev->parent_bus->info->print_dev)
|
| 993 |
dev->parent_bus->info->print_dev(mon, dev, indent); |
| 994 |
QLIST_FOREACH(child, &dev->child_bus, sibling) {
|
| 995 |
qbus_print(mon, child, indent); |
| 996 |
} |
| 997 |
} |
| 998 |
|
| 999 |
static void qbus_print(Monitor *mon, BusState *bus, int indent) |
| 1000 |
{
|
| 1001 |
struct DeviceState *dev;
|
| 1002 |
|
| 1003 |
qdev_printf("bus: %s\n", bus->name);
|
| 1004 |
indent += 2;
|
| 1005 |
qdev_printf("type %s\n", bus->info->name);
|
| 1006 |
QTAILQ_FOREACH(dev, &bus->children, sibling) {
|
| 1007 |
qdev_print(mon, dev, indent); |
| 1008 |
} |
| 1009 |
} |
| 1010 |
#undef qdev_printf
|
| 1011 |
|
| 1012 |
void do_info_qtree(Monitor *mon)
|
| 1013 |
{
|
| 1014 |
if (main_system_bus)
|
| 1015 |
qbus_print(mon, main_system_bus, 0);
|
| 1016 |
} |
| 1017 |
|
| 1018 |
void do_info_qdm(Monitor *mon)
|
| 1019 |
{
|
| 1020 |
DeviceInfo *info; |
| 1021 |
|
| 1022 |
for (info = device_info_list; info != NULL; info = info->next) { |
| 1023 |
qdev_print_devinfo(info); |
| 1024 |
} |
| 1025 |
} |
| 1026 |
|
| 1027 |
int do_device_add(Monitor *mon, const QDict *qdict, QObject **ret_data) |
| 1028 |
{
|
| 1029 |
QemuOpts *opts; |
| 1030 |
|
| 1031 |
opts = qemu_opts_from_qdict(qemu_find_opts("device"), qdict);
|
| 1032 |
if (!opts) {
|
| 1033 |
return -1; |
| 1034 |
} |
| 1035 |
if (!monitor_cur_is_qmp() && qdev_device_help(opts)) {
|
| 1036 |
qemu_opts_del(opts); |
| 1037 |
return 0; |
| 1038 |
} |
| 1039 |
if (!qdev_device_add(opts)) {
|
| 1040 |
qemu_opts_del(opts); |
| 1041 |
return -1; |
| 1042 |
} |
| 1043 |
return 0; |
| 1044 |
} |
| 1045 |
|
| 1046 |
int do_device_del(Monitor *mon, const QDict *qdict, QObject **ret_data) |
| 1047 |
{
|
| 1048 |
const char *id = qdict_get_str(qdict, "id"); |
| 1049 |
DeviceState *dev; |
| 1050 |
|
| 1051 |
dev = qdev_find_recursive(main_system_bus, id); |
| 1052 |
if (NULL == dev) { |
| 1053 |
qerror_report(QERR_DEVICE_NOT_FOUND, id); |
| 1054 |
return -1; |
| 1055 |
} |
| 1056 |
return qdev_unplug(dev);
|
| 1057 |
} |
| 1058 |
|
| 1059 |
static int qdev_get_fw_dev_path_helper(DeviceState *dev, char *p, int size) |
| 1060 |
{
|
| 1061 |
int l = 0; |
| 1062 |
|
| 1063 |
if (dev && dev->parent_bus) {
|
| 1064 |
char *d;
|
| 1065 |
l = qdev_get_fw_dev_path_helper(dev->parent_bus->parent, p, size); |
| 1066 |
if (dev->parent_bus->info->get_fw_dev_path) {
|
| 1067 |
d = dev->parent_bus->info->get_fw_dev_path(dev); |
| 1068 |
l += snprintf(p + l, size - l, "%s", d);
|
| 1069 |
g_free(d); |
| 1070 |
} else {
|
| 1071 |
l += snprintf(p + l, size - l, "%s", qdev_get_info(dev)->name);
|
| 1072 |
} |
| 1073 |
} |
| 1074 |
l += snprintf(p + l , size - l, "/");
|
| 1075 |
|
| 1076 |
return l;
|
| 1077 |
} |
| 1078 |
|
| 1079 |
char* qdev_get_fw_dev_path(DeviceState *dev)
|
| 1080 |
{
|
| 1081 |
char path[128]; |
| 1082 |
int l;
|
| 1083 |
|
| 1084 |
l = qdev_get_fw_dev_path_helper(dev, path, 128);
|
| 1085 |
|
| 1086 |
path[l-1] = '\0'; |
| 1087 |
|
| 1088 |
return strdup(path);
|
| 1089 |
} |
| 1090 |
|
| 1091 |
char *qdev_get_type(DeviceState *dev, Error **errp)
|
| 1092 |
{
|
| 1093 |
return g_strdup(qdev_get_info(dev)->name);
|
| 1094 |
} |
| 1095 |
|
| 1096 |
void qdev_ref(DeviceState *dev)
|
| 1097 |
{
|
| 1098 |
dev->ref++; |
| 1099 |
} |
| 1100 |
|
| 1101 |
void qdev_unref(DeviceState *dev)
|
| 1102 |
{
|
| 1103 |
g_assert(dev->ref > 0);
|
| 1104 |
dev->ref--; |
| 1105 |
} |
| 1106 |
|
| 1107 |
void qdev_property_add(DeviceState *dev, const char *name, const char *type, |
| 1108 |
DevicePropertyAccessor *get, DevicePropertyAccessor *set, |
| 1109 |
DevicePropertyRelease *release, |
| 1110 |
void *opaque, Error **errp)
|
| 1111 |
{
|
| 1112 |
DeviceProperty *prop = g_malloc0(sizeof(*prop));
|
| 1113 |
|
| 1114 |
prop->name = g_strdup(name); |
| 1115 |
prop->type = g_strdup(type); |
| 1116 |
|
| 1117 |
prop->get = get; |
| 1118 |
prop->set = set; |
| 1119 |
prop->release = release; |
| 1120 |
prop->opaque = opaque; |
| 1121 |
|
| 1122 |
QTAILQ_INSERT_TAIL(&dev->properties, prop, node); |
| 1123 |
} |
| 1124 |
|
| 1125 |
static DeviceProperty *qdev_property_find(DeviceState *dev, const char *name) |
| 1126 |
{
|
| 1127 |
DeviceProperty *prop; |
| 1128 |
|
| 1129 |
QTAILQ_FOREACH(prop, &dev->properties, node) {
|
| 1130 |
if (strcmp(prop->name, name) == 0) { |
| 1131 |
return prop;
|
| 1132 |
} |
| 1133 |
} |
| 1134 |
|
| 1135 |
return NULL; |
| 1136 |
} |
| 1137 |
|
| 1138 |
void qdev_property_get(DeviceState *dev, Visitor *v, const char *name, |
| 1139 |
Error **errp) |
| 1140 |
{
|
| 1141 |
DeviceProperty *prop = qdev_property_find(dev, name); |
| 1142 |
|
| 1143 |
if (prop == NULL) { |
| 1144 |
error_set(errp, QERR_PROPERTY_NOT_FOUND, dev->id?:"", name);
|
| 1145 |
return;
|
| 1146 |
} |
| 1147 |
|
| 1148 |
if (!prop->get) {
|
| 1149 |
error_set(errp, QERR_PERMISSION_DENIED); |
| 1150 |
} else {
|
| 1151 |
prop->get(dev, v, prop->opaque, name, errp); |
| 1152 |
} |
| 1153 |
} |
| 1154 |
|
| 1155 |
void qdev_property_set(DeviceState *dev, Visitor *v, const char *name, |
| 1156 |
Error **errp) |
| 1157 |
{
|
| 1158 |
DeviceProperty *prop = qdev_property_find(dev, name); |
| 1159 |
|
| 1160 |
if (prop == NULL) { |
| 1161 |
error_set(errp, QERR_PROPERTY_NOT_FOUND, dev->id?:"", name);
|
| 1162 |
return;
|
| 1163 |
} |
| 1164 |
|
| 1165 |
if (!prop->set) {
|
| 1166 |
error_set(errp, QERR_PERMISSION_DENIED); |
| 1167 |
} else {
|
| 1168 |
prop->set(dev, v, prop->opaque, name, errp); |
| 1169 |
} |
| 1170 |
} |
| 1171 |
|
| 1172 |
const char *qdev_property_get_type(DeviceState *dev, const char *name, Error **errp) |
| 1173 |
{
|
| 1174 |
DeviceProperty *prop = qdev_property_find(dev, name); |
| 1175 |
|
| 1176 |
if (prop == NULL) { |
| 1177 |
error_set(errp, QERR_PROPERTY_NOT_FOUND, dev->id?:"", name);
|
| 1178 |
return NULL; |
| 1179 |
} |
| 1180 |
|
| 1181 |
return prop->type;
|
| 1182 |
} |
| 1183 |
|
| 1184 |
/**
|
| 1185 |
* Legacy property handling
|
| 1186 |
*/
|
| 1187 |
|
| 1188 |
static void qdev_get_legacy_property(DeviceState *dev, Visitor *v, void *opaque, |
| 1189 |
const char *name, Error **errp) |
| 1190 |
{
|
| 1191 |
Property *prop = opaque; |
| 1192 |
|
| 1193 |
char buffer[1024]; |
| 1194 |
char *ptr = buffer;
|
| 1195 |
|
| 1196 |
prop->info->print(dev, prop, buffer, sizeof(buffer));
|
| 1197 |
visit_type_str(v, &ptr, name, errp); |
| 1198 |
} |
| 1199 |
|
| 1200 |
static void qdev_set_legacy_property(DeviceState *dev, Visitor *v, void *opaque, |
| 1201 |
const char *name, Error **errp) |
| 1202 |
{
|
| 1203 |
Property *prop = opaque; |
| 1204 |
Error *local_err = NULL;
|
| 1205 |
char *ptr = NULL; |
| 1206 |
int ret;
|
| 1207 |
|
| 1208 |
if (dev->state != DEV_STATE_CREATED) {
|
| 1209 |
error_set(errp, QERR_PERMISSION_DENIED); |
| 1210 |
return;
|
| 1211 |
} |
| 1212 |
|
| 1213 |
visit_type_str(v, &ptr, name, &local_err); |
| 1214 |
if (local_err) {
|
| 1215 |
error_propagate(errp, local_err); |
| 1216 |
return;
|
| 1217 |
} |
| 1218 |
|
| 1219 |
ret = prop->info->parse(dev, prop, ptr); |
| 1220 |
error_set_from_qdev_prop_error(errp, ret, dev, prop, ptr); |
| 1221 |
g_free(ptr); |
| 1222 |
} |
| 1223 |
|
| 1224 |
/**
|
| 1225 |
* @qdev_add_legacy_property - adds a legacy property
|
| 1226 |
*
|
| 1227 |
* Do not use this is new code! Properties added through this interface will
|
| 1228 |
* be given names and types in the "legacy" namespace.
|
| 1229 |
*
|
| 1230 |
* Legacy properties are always processed as strings. The format of the string
|
| 1231 |
* depends on the property type.
|
| 1232 |
*/
|
| 1233 |
void qdev_property_add_legacy(DeviceState *dev, Property *prop,
|
| 1234 |
Error **errp) |
| 1235 |
{
|
| 1236 |
gchar *name, *type; |
| 1237 |
|
| 1238 |
name = g_strdup_printf("legacy-%s", prop->name);
|
| 1239 |
type = g_strdup_printf("legacy<%s>",
|
| 1240 |
prop->info->legacy_name ?: prop->info->name); |
| 1241 |
|
| 1242 |
qdev_property_add(dev, name, type, |
| 1243 |
prop->info->print ? qdev_get_legacy_property : NULL,
|
| 1244 |
prop->info->parse ? qdev_set_legacy_property : NULL,
|
| 1245 |
NULL,
|
| 1246 |
prop, errp); |
| 1247 |
|
| 1248 |
g_free(type); |
| 1249 |
g_free(name); |
| 1250 |
} |
| 1251 |
|
| 1252 |
/**
|
| 1253 |
* @qdev_property_add_static - add a @Property to a device.
|
| 1254 |
*
|
| 1255 |
* Static properties access data in a struct. The actual type of the
|
| 1256 |
* property and the field depends on the property type.
|
| 1257 |
*/
|
| 1258 |
void qdev_property_add_static(DeviceState *dev, Property *prop,
|
| 1259 |
Error **errp) |
| 1260 |
{
|
| 1261 |
qdev_property_add(dev, prop->name, prop->info->name, |
| 1262 |
prop->info->get, prop->info->set, |
| 1263 |
NULL,
|
| 1264 |
prop, errp); |
| 1265 |
} |
| 1266 |
|
| 1267 |
DeviceState *qdev_get_root(void)
|
| 1268 |
{
|
| 1269 |
static DeviceState *qdev_root;
|
| 1270 |
|
| 1271 |
if (!qdev_root) {
|
| 1272 |
qdev_root = qdev_create(NULL, "container"); |
| 1273 |
qdev_init_nofail(qdev_root); |
| 1274 |
} |
| 1275 |
|
| 1276 |
return qdev_root;
|
| 1277 |
} |
| 1278 |
|
| 1279 |
static void qdev_get_child_property(DeviceState *dev, Visitor *v, void *opaque, |
| 1280 |
const char *name, Error **errp) |
| 1281 |
{
|
| 1282 |
DeviceState *child = opaque; |
| 1283 |
gchar *path; |
| 1284 |
|
| 1285 |
path = qdev_get_canonical_path(child); |
| 1286 |
visit_type_str(v, &path, name, errp); |
| 1287 |
g_free(path); |
| 1288 |
} |
| 1289 |
|
| 1290 |
static void qdev_release_child_property(DeviceState *dev, const char *name, |
| 1291 |
void *opaque)
|
| 1292 |
{
|
| 1293 |
DeviceState *child = opaque; |
| 1294 |
|
| 1295 |
qdev_unref(child); |
| 1296 |
} |
| 1297 |
|
| 1298 |
void qdev_property_add_child(DeviceState *dev, const char *name, |
| 1299 |
DeviceState *child, Error **errp) |
| 1300 |
{
|
| 1301 |
gchar *type; |
| 1302 |
|
| 1303 |
type = g_strdup_printf("child<%s>", qdev_get_info(child)->name);
|
| 1304 |
|
| 1305 |
qdev_property_add(dev, name, type, qdev_get_child_property, |
| 1306 |
NULL, qdev_release_child_property,
|
| 1307 |
child, errp); |
| 1308 |
|
| 1309 |
qdev_ref(child); |
| 1310 |
g_assert(child->parent == NULL);
|
| 1311 |
child->parent = dev; |
| 1312 |
|
| 1313 |
g_free(type); |
| 1314 |
} |
| 1315 |
|
| 1316 |
static void qdev_get_link_property(DeviceState *dev, Visitor *v, void *opaque, |
| 1317 |
const char *name, Error **errp) |
| 1318 |
{
|
| 1319 |
DeviceState **child = opaque; |
| 1320 |
gchar *path; |
| 1321 |
|
| 1322 |
if (*child) {
|
| 1323 |
path = qdev_get_canonical_path(*child); |
| 1324 |
visit_type_str(v, &path, name, errp); |
| 1325 |
g_free(path); |
| 1326 |
} else {
|
| 1327 |
path = (gchar *)"";
|
| 1328 |
visit_type_str(v, &path, name, errp); |
| 1329 |
} |
| 1330 |
} |
| 1331 |
|
| 1332 |
static void qdev_set_link_property(DeviceState *dev, Visitor *v, void *opaque, |
| 1333 |
const char *name, Error **errp) |
| 1334 |
{
|
| 1335 |
DeviceState **child = opaque; |
| 1336 |
bool ambiguous = false; |
| 1337 |
const char *type; |
| 1338 |
char *path;
|
| 1339 |
|
| 1340 |
type = qdev_property_get_type(dev, name, NULL);
|
| 1341 |
|
| 1342 |
visit_type_str(v, &path, name, errp); |
| 1343 |
|
| 1344 |
if (*child) {
|
| 1345 |
qdev_unref(*child); |
| 1346 |
} |
| 1347 |
|
| 1348 |
if (strcmp(path, "") != 0) { |
| 1349 |
DeviceState *target; |
| 1350 |
|
| 1351 |
target = qdev_resolve_path(path, &ambiguous); |
| 1352 |
if (target) {
|
| 1353 |
gchar *target_type; |
| 1354 |
|
| 1355 |
target_type = g_strdup_printf("link<%s>", qdev_get_info(target)->name);
|
| 1356 |
if (strcmp(target_type, type) == 0) { |
| 1357 |
*child = target; |
| 1358 |
qdev_ref(target); |
| 1359 |
} else {
|
| 1360 |
error_set(errp, QERR_INVALID_PARAMETER_TYPE, name, type); |
| 1361 |
} |
| 1362 |
|
| 1363 |
g_free(target_type); |
| 1364 |
} else {
|
| 1365 |
error_set(errp, QERR_DEVICE_NOT_FOUND, path); |
| 1366 |
} |
| 1367 |
} else {
|
| 1368 |
*child = NULL;
|
| 1369 |
} |
| 1370 |
|
| 1371 |
g_free(path); |
| 1372 |
} |
| 1373 |
|
| 1374 |
void qdev_property_add_link(DeviceState *dev, const char *name, |
| 1375 |
const char *type, DeviceState **child, |
| 1376 |
Error **errp) |
| 1377 |
{
|
| 1378 |
gchar *full_type; |
| 1379 |
|
| 1380 |
full_type = g_strdup_printf("link<%s>", type);
|
| 1381 |
|
| 1382 |
qdev_property_add(dev, name, full_type, |
| 1383 |
qdev_get_link_property, |
| 1384 |
qdev_set_link_property, |
| 1385 |
NULL, child, errp);
|
| 1386 |
|
| 1387 |
g_free(full_type); |
| 1388 |
} |
| 1389 |
|
| 1390 |
gchar *qdev_get_canonical_path(DeviceState *dev) |
| 1391 |
{
|
| 1392 |
DeviceState *root = qdev_get_root(); |
| 1393 |
char *newpath = NULL, *path = NULL; |
| 1394 |
|
| 1395 |
while (dev != root) {
|
| 1396 |
DeviceProperty *prop = NULL;
|
| 1397 |
|
| 1398 |
g_assert(dev->parent != NULL);
|
| 1399 |
|
| 1400 |
QTAILQ_FOREACH(prop, &dev->parent->properties, node) {
|
| 1401 |
if (!strstart(prop->type, "child<", NULL)) { |
| 1402 |
continue;
|
| 1403 |
} |
| 1404 |
|
| 1405 |
if (prop->opaque == dev) {
|
| 1406 |
if (path) {
|
| 1407 |
newpath = g_strdup_printf("%s/%s", prop->name, path);
|
| 1408 |
g_free(path); |
| 1409 |
path = newpath; |
| 1410 |
} else {
|
| 1411 |
path = g_strdup(prop->name); |
| 1412 |
} |
| 1413 |
break;
|
| 1414 |
} |
| 1415 |
} |
| 1416 |
|
| 1417 |
g_assert(prop != NULL);
|
| 1418 |
|
| 1419 |
dev = dev->parent; |
| 1420 |
} |
| 1421 |
|
| 1422 |
newpath = g_strdup_printf("/%s", path);
|
| 1423 |
g_free(path); |
| 1424 |
|
| 1425 |
return newpath;
|
| 1426 |
} |
| 1427 |
|
| 1428 |
static DeviceState *qdev_resolve_abs_path(DeviceState *parent,
|
| 1429 |
gchar **parts, |
| 1430 |
int index)
|
| 1431 |
{
|
| 1432 |
DeviceProperty *prop; |
| 1433 |
DeviceState *child; |
| 1434 |
|
| 1435 |
if (parts[index] == NULL) { |
| 1436 |
return parent;
|
| 1437 |
} |
| 1438 |
|
| 1439 |
if (strcmp(parts[index], "") == 0) { |
| 1440 |
return qdev_resolve_abs_path(parent, parts, index + 1); |
| 1441 |
} |
| 1442 |
|
| 1443 |
prop = qdev_property_find(parent, parts[index]); |
| 1444 |
if (prop == NULL) { |
| 1445 |
return NULL; |
| 1446 |
} |
| 1447 |
|
| 1448 |
child = NULL;
|
| 1449 |
if (strstart(prop->type, "link<", NULL)) { |
| 1450 |
DeviceState **pchild = prop->opaque; |
| 1451 |
if (*pchild) {
|
| 1452 |
child = *pchild; |
| 1453 |
} |
| 1454 |
} else if (strstart(prop->type, "child<", NULL)) { |
| 1455 |
child = prop->opaque; |
| 1456 |
} |
| 1457 |
|
| 1458 |
if (!child) {
|
| 1459 |
return NULL; |
| 1460 |
} |
| 1461 |
|
| 1462 |
return qdev_resolve_abs_path(child, parts, index + 1); |
| 1463 |
} |
| 1464 |
|
| 1465 |
static DeviceState *qdev_resolve_partial_path(DeviceState *parent,
|
| 1466 |
gchar **parts, |
| 1467 |
bool *ambiguous)
|
| 1468 |
{
|
| 1469 |
DeviceState *dev; |
| 1470 |
DeviceProperty *prop; |
| 1471 |
|
| 1472 |
dev = qdev_resolve_abs_path(parent, parts, 0);
|
| 1473 |
|
| 1474 |
QTAILQ_FOREACH(prop, &parent->properties, node) {
|
| 1475 |
DeviceState *found; |
| 1476 |
|
| 1477 |
if (!strstart(prop->type, "child<", NULL)) { |
| 1478 |
continue;
|
| 1479 |
} |
| 1480 |
|
| 1481 |
found = qdev_resolve_partial_path(prop->opaque, parts, ambiguous); |
| 1482 |
if (found) {
|
| 1483 |
if (dev) {
|
| 1484 |
if (ambiguous) {
|
| 1485 |
*ambiguous = true;
|
| 1486 |
} |
| 1487 |
return NULL; |
| 1488 |
} |
| 1489 |
dev = found; |
| 1490 |
} |
| 1491 |
|
| 1492 |
if (ambiguous && *ambiguous) {
|
| 1493 |
return NULL; |
| 1494 |
} |
| 1495 |
} |
| 1496 |
|
| 1497 |
return dev;
|
| 1498 |
} |
| 1499 |
|
| 1500 |
DeviceState *qdev_resolve_path(const char *path, bool *ambiguous) |
| 1501 |
{
|
| 1502 |
bool partial_path = true; |
| 1503 |
DeviceState *dev; |
| 1504 |
gchar **parts; |
| 1505 |
|
| 1506 |
parts = g_strsplit(path, "/", 0); |
| 1507 |
if (parts == NULL || parts[0] == NULL) { |
| 1508 |
g_strfreev(parts); |
| 1509 |
return qdev_get_root();
|
| 1510 |
} |
| 1511 |
|
| 1512 |
if (strcmp(parts[0], "") == 0) { |
| 1513 |
partial_path = false;
|
| 1514 |
} |
| 1515 |
|
| 1516 |
if (partial_path) {
|
| 1517 |
if (ambiguous) {
|
| 1518 |
*ambiguous = false;
|
| 1519 |
} |
| 1520 |
dev = qdev_resolve_partial_path(qdev_get_root(), parts, ambiguous); |
| 1521 |
} else {
|
| 1522 |
dev = qdev_resolve_abs_path(qdev_get_root(), parts, 1);
|
| 1523 |
} |
| 1524 |
|
| 1525 |
g_strfreev(parts); |
| 1526 |
|
| 1527 |
return dev;
|
| 1528 |
} |
| 1529 |
|
| 1530 |
typedef struct StringProperty |
| 1531 |
{
|
| 1532 |
char *(*get)(DeviceState *, Error **);
|
| 1533 |
void (*set)(DeviceState *, const char *, Error **); |
| 1534 |
} StringProperty; |
| 1535 |
|
| 1536 |
static void qdev_property_get_str(DeviceState *dev, Visitor *v, void *opaque, |
| 1537 |
const char *name, Error **errp) |
| 1538 |
{
|
| 1539 |
StringProperty *prop = opaque; |
| 1540 |
char *value;
|
| 1541 |
|
| 1542 |
value = prop->get(dev, errp); |
| 1543 |
if (value) {
|
| 1544 |
visit_type_str(v, &value, name, errp); |
| 1545 |
g_free(value); |
| 1546 |
} |
| 1547 |
} |
| 1548 |
|
| 1549 |
static void qdev_property_set_str(DeviceState *dev, Visitor *v, void *opaque, |
| 1550 |
const char *name, Error **errp) |
| 1551 |
{
|
| 1552 |
StringProperty *prop = opaque; |
| 1553 |
char *value;
|
| 1554 |
Error *local_err = NULL;
|
| 1555 |
|
| 1556 |
visit_type_str(v, &value, name, &local_err); |
| 1557 |
if (local_err) {
|
| 1558 |
error_propagate(errp, local_err); |
| 1559 |
return;
|
| 1560 |
} |
| 1561 |
|
| 1562 |
prop->set(dev, value, errp); |
| 1563 |
g_free(value); |
| 1564 |
} |
| 1565 |
|
| 1566 |
static void qdev_property_release_str(DeviceState *dev, const char *name, |
| 1567 |
void *opaque)
|
| 1568 |
{
|
| 1569 |
StringProperty *prop = opaque; |
| 1570 |
g_free(prop); |
| 1571 |
} |
| 1572 |
|
| 1573 |
void qdev_property_add_str(DeviceState *dev, const char *name, |
| 1574 |
char *(*get)(DeviceState *, Error **),
|
| 1575 |
void (*set)(DeviceState *, const char *, Error **), |
| 1576 |
Error **errp) |
| 1577 |
{
|
| 1578 |
StringProperty *prop = g_malloc0(sizeof(*prop));
|
| 1579 |
|
| 1580 |
prop->get = get; |
| 1581 |
prop->set = set; |
| 1582 |
|
| 1583 |
qdev_property_add(dev, name, "string",
|
| 1584 |
get ? qdev_property_get_str : NULL,
|
| 1585 |
set ? qdev_property_set_str : NULL,
|
| 1586 |
qdev_property_release_str, |
| 1587 |
prop, errp); |
| 1588 |
} |
| 1589 |
|
| 1590 |
void qdev_machine_init(void) |
| 1591 |
{
|
| 1592 |
qdev_get_peripheral_anon(); |
| 1593 |
qdev_get_peripheral(); |
| 1594 |
} |
| 1595 |
|
| 1596 |
static TypeInfo device_type_info = {
|
| 1597 |
.name = TYPE_DEVICE, |
| 1598 |
.parent = TYPE_OBJECT, |
| 1599 |
.instance_size = sizeof(DeviceState),
|
| 1600 |
.abstract = true,
|
| 1601 |
.class_size = sizeof(DeviceClass),
|
| 1602 |
}; |
| 1603 |
|
| 1604 |
static void init_qdev(void) |
| 1605 |
{
|
| 1606 |
type_register_static(&device_type_info); |
| 1607 |
} |
| 1608 |
|
| 1609 |
device_init(init_qdev); |