2 * Dynamic device configuration and creation.
4 * Copyright (c) 2009 CodeSourcery
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
21 /* The theory here is that it should be possible to create a machine without
22 knowledge of specific devices. Historically board init routines have
23 passed a bunch of arguments to each device, requiring the board know
24 exactly which device it is dealing with. This file provides an abstract
25 API for device configuration and initialization. Devices will generally
26 inherit from a particular bus (e.g. PCI or I2C) rather than
33 struct DeviceProperty {
50 /* This is a nasty hack to allow passing a NULL bus to qdev_create. */
51 BusState *main_system_bus;
53 static DeviceType *device_type_list;
55 /* Register a new device type. */
56 void qdev_register(const char *name, int size, DeviceInfo *info)
60 assert(size >= sizeof(DeviceState));
62 t = qemu_mallocz(sizeof(DeviceType));
63 t->next = device_type_list;
65 t->name = qemu_strdup(name);
70 /* Create a new device. This only initializes the device state structure
71 and allows properties to be set. qdev_init should be called to
72 initialize the actual device emulation. */
73 DeviceState *qdev_create(BusState *bus, const char *name)
78 for (t = device_type_list; t; t = t->next) {
79 if (strcmp(t->name, name) == 0) {
84 hw_error("Unknown device '%s'\n", name);
87 dev = qemu_mallocz(t->size);
91 /* ???: This assumes system busses have no additional state. */
92 if (!main_system_bus) {
93 main_system_bus = qbus_create(BUS_TYPE_SYSTEM, sizeof(BusState),
94 NULL, "main-system-bus");
96 bus = main_system_bus;
98 if (t->info->bus_type != bus->type) {
99 /* TODO: Print bus type names. */
100 hw_error("Device '%s' on wrong bus type (%d/%d)", name,
101 t->info->bus_type, bus->type);
103 dev->parent_bus = bus;
104 LIST_INSERT_HEAD(&bus->children, dev, sibling);
108 /* Initialize a device. Device properties should be set before calling
109 this function. IRQs and MMIO regions should be connected/mapped after
110 calling this function. */
111 void qdev_init(DeviceState *dev)
113 dev->type->info->init(dev, dev->type->info);
116 /* Unlink device from bus and free the structure. */
117 void qdev_free(DeviceState *dev)
119 LIST_REMOVE(dev, sibling);
123 static DeviceProperty *create_prop(DeviceState *dev, const char *name,
126 DeviceProperty *prop;
128 /* TODO: Check for duplicate properties. */
129 prop = qemu_mallocz(sizeof(*prop));
130 prop->name = qemu_strdup(name);
132 prop->next = dev->props;
138 void qdev_set_prop_int(DeviceState *dev, const char *name, uint64_t value)
140 DeviceProperty *prop;
142 prop = create_prop(dev, name, PROP_TYPE_INT);
143 prop->value.i = value;
146 void qdev_set_prop_dev(DeviceState *dev, const char *name, DeviceState *value)
148 DeviceProperty *prop;
150 prop = create_prop(dev, name, PROP_TYPE_DEV);
151 prop->value.ptr = value;
154 void qdev_set_prop_ptr(DeviceState *dev, const char *name, void *value)
156 DeviceProperty *prop;
158 prop = create_prop(dev, name, PROP_TYPE_INT);
159 prop->value.ptr = value;
162 void qdev_set_netdev(DeviceState *dev, NICInfo *nd)
169 /* Get a character (serial) device interface. */
170 CharDriverState *qdev_init_chardev(DeviceState *dev)
172 static int next_serial;
173 static int next_virtconsole;
174 /* FIXME: This is a nasty hack that needs to go away. */
175 if (strncmp(dev->type->name, "virtio", 6) == 0) {
176 return virtcon_hds[next_virtconsole++];
178 return serial_hds[next_serial++];
182 BusState *qdev_get_parent_bus(DeviceState *dev)
184 return dev->parent_bus;
187 static DeviceProperty *find_prop(DeviceState *dev, const char *name,
190 DeviceProperty *prop;
192 for (prop = dev->props; prop; prop = prop->next) {
193 if (strcmp(prop->name, name) == 0) {
194 assert (prop->type == type);
201 uint64_t qdev_get_prop_int(DeviceState *dev, const char *name, uint64_t def)
203 DeviceProperty *prop;
205 prop = find_prop(dev, name, PROP_TYPE_INT);
210 return prop->value.i;
213 void *qdev_get_prop_ptr(DeviceState *dev, const char *name)
215 DeviceProperty *prop;
217 prop = find_prop(dev, name, PROP_TYPE_PTR);
219 return prop->value.ptr;
222 DeviceState *qdev_get_prop_dev(DeviceState *dev, const char *name)
224 DeviceProperty *prop;
226 prop = find_prop(dev, name, PROP_TYPE_DEV);
230 return prop->value.ptr;
233 void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n)
235 assert(dev->num_gpio_in == 0);
236 dev->num_gpio_in = n;
237 dev->gpio_in = qemu_allocate_irqs(handler, dev, n);
240 void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n)
242 assert(dev->num_gpio_out == 0);
243 dev->num_gpio_out = n;
244 dev->gpio_out = pins;
247 qemu_irq qdev_get_gpio_in(DeviceState *dev, int n)
249 assert(n >= 0 && n < dev->num_gpio_in);
250 return dev->gpio_in[n];
253 void qdev_connect_gpio_out(DeviceState * dev, int n, qemu_irq pin)
255 assert(n >= 0 && n < dev->num_gpio_out);
256 dev->gpio_out[n] = pin;
259 VLANClientState *qdev_get_vlan_client(DeviceState *dev,
260 IOReadHandler *fd_read,
261 IOCanRWHandler *fd_can_read,
265 NICInfo *nd = dev->nd;
267 return qemu_new_vlan_client(nd->vlan, nd->model, nd->name,
268 fd_read, fd_can_read, cleanup, opaque);
272 void qdev_get_macaddr(DeviceState *dev, uint8_t *macaddr)
274 memcpy(macaddr, dev->nd->macaddr, 6);
277 static int next_block_unit[IF_COUNT];
279 /* Get a block device. This should only be used for single-drive devices
280 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
282 BlockDriverState *qdev_init_bdrv(DeviceState *dev, BlockInterfaceType type)
284 int unit = next_block_unit[type]++;
287 index = drive_get_index(type, 0, unit);
291 return drives_table[index].bdrv;
294 BusState *qdev_get_child_bus(DeviceState *dev, const char *name)
298 LIST_FOREACH(bus, &dev->child_bus, sibling) {
299 if (strcmp(name, bus->name) == 0) {
306 static int next_scsi_bus;
308 /* Create a scsi bus, and attach devices to it. */
309 /* TODO: Actually create a scsi bus for hotplug to use. */
310 void scsi_bus_new(DeviceState *host, SCSIAttachFn attach)
312 int bus = next_scsi_bus++;
316 for (unit = 0; unit < MAX_SCSI_DEVS; unit++) {
317 index = drive_get_index(IF_SCSI, bus, unit);
321 attach(host, drives_table[index].bdrv, unit);
325 BusState *qbus_create(BusType type, size_t size,
326 DeviceState *parent, const char *name)
330 bus = qemu_mallocz(size);
332 bus->parent = parent;
333 bus->name = qemu_strdup(name);
334 LIST_INIT(&bus->children);
336 LIST_INSERT_HEAD(&parent->child_bus, bus, sibling);