summaryrefslogtreecommitdiff
path: root/hw/qdev.c
blob: faecc767af1517fc413243357fd247f524328374 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
/*
 *  Dynamic device configuration and creation.
 *
 *  Copyright (c) 2009 CodeSourcery
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */

/* The theory here is that it should be possible to create a machine without
   knowledge of specific devices.  Historically board init routines have
   passed a bunch of arguments to each device, requiring the board know
   exactly which device it is dealing with.  This file provides an abstract
   API for device configuration and initialization.  Devices will generally
   inherit from a particular bus (e.g. PCI or I2C) rather than
   this API directly.  */

#include "net.h"
#include "qdev.h"
#include "sysemu.h"
#include "monitor.h"

/* This is a nasty hack to allow passing a NULL bus to qdev_create.  */
static BusState *main_system_bus;

static DeviceInfo *device_info_list;

/* Register a new device type.  */
void qdev_register(DeviceInfo *info)
{
    assert(info->size >= sizeof(DeviceState));
    assert(!info->next);

    info->next = device_info_list;
    device_info_list = info;
}

static DeviceInfo *qdev_find_info(BusInfo *bus_info, const char *name)
{
    DeviceInfo *info;

    /* first check device names */
    for (info = device_info_list; info != NULL; info = info->next) {
        if (bus_info && info->bus_info != bus_info)
            continue;
        if (strcmp(info->name, name) != 0)
            continue;
        return info;
    }

    /* failing that check the aliases */
    for (info = device_info_list; info != NULL; info = info->next) {
        if (bus_info && info->bus_info != bus_info)
            continue;
        if (!info->alias)
            continue;
        if (strcmp(info->alias, name) != 0)
            continue;
        return info;
    }
    return NULL;
}

/* Create a new device.  This only initializes the device state structure
   and allows properties to be set.  qdev_init should be called to
   initialize the actual device emulation.  */
DeviceState *qdev_create(BusState *bus, const char *name)
{
    DeviceInfo *info;
    DeviceState *dev;

    if (!bus) {
        if (!main_system_bus) {
            main_system_bus = qbus_create(&system_bus_info, NULL, "main-system-bus");
        }
        bus = main_system_bus;
    }

    info = qdev_find_info(bus->info, name);
    if (!info) {
        hw_error("Unknown device '%s' for bus '%s'\n", name, bus->info->name);
    }

    dev = qemu_mallocz(info->size);
    dev->info = info;
    dev->parent_bus = bus;
    qdev_prop_set_defaults(dev, dev->info->props);
    qdev_prop_set_defaults(dev, dev->parent_bus->info->props);
    qdev_prop_set_compat(dev);
    LIST_INSERT_HEAD(&bus->children, dev, sibling);
    return dev;
}

/* Initialize a device.  Device properties should be set before calling
   this function.  IRQs and MMIO regions should be connected/mapped after
   calling this function.  */
void qdev_init(DeviceState *dev)
{
    dev->info->init(dev, dev->info);
}

/* Unlink device from bus and free the structure.  */
void qdev_free(DeviceState *dev)
{
    LIST_REMOVE(dev, sibling);
    qemu_free(dev->id);
    qemu_free(dev);
}

/* Get a character (serial) device interface.  */
CharDriverState *qdev_init_chardev(DeviceState *dev)
{
    static int next_serial;
    static int next_virtconsole;
    /* FIXME: This is a nasty hack that needs to go away.  */
    if (strncmp(dev->info->name, "virtio", 6) == 0) {
        return virtcon_hds[next_virtconsole++];
    } else {
        return serial_hds[next_serial++];
    }
}

BusState *qdev_get_parent_bus(DeviceState *dev)
{
    return dev->parent_bus;
}

void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n)
{
    assert(dev->num_gpio_in == 0);
    dev->num_gpio_in = n;
    dev->gpio_in = qemu_allocate_irqs(handler, dev, n);
}

void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n)
{
    assert(dev->num_gpio_out == 0);
    dev->num_gpio_out = n;
    dev->gpio_out = pins;
}

qemu_irq qdev_get_gpio_in(DeviceState *dev, int n)
{
    assert(n >= 0 && n < dev->num_gpio_in);
    return dev->gpio_in[n];
}

void qdev_connect_gpio_out(DeviceState * dev, int n, qemu_irq pin)
{
    assert(n >= 0 && n < dev->num_gpio_out);
    dev->gpio_out[n] = pin;
}

VLANClientState *qdev_get_vlan_client(DeviceState *dev,
                                      NetCanReceive *can_receive,
                                      NetReceive *receive,
                                      NetReceiveIOV *receive_iov,
                                      NetCleanup *cleanup,
                                      void *opaque)
{
    NICInfo *nd = dev->nd;
    assert(nd);
    nd->vc = qemu_new_vlan_client(nd->vlan, nd->model, nd->name, can_receive,
                                  receive, receive_iov, cleanup, opaque);
    return nd->vc;
}


void qdev_get_macaddr(DeviceState *dev, uint8_t *macaddr)
{
    memcpy(macaddr, dev->nd->macaddr, 6);
}

static int next_block_unit[IF_COUNT];

/* Get a block device.  This should only be used for single-drive devices
   (e.g. SD/Floppy/MTD).  Multi-disk devices (scsi/ide) should use the
   appropriate bus.  */
BlockDriverState *qdev_init_bdrv(DeviceState *dev, BlockInterfaceType type)
{
    int unit = next_block_unit[type]++;
    int index;

    index = drive_get_index(type, 0, unit);
    if (index == -1) {
        return NULL;
    }
    return drives_table[index].bdrv;
}

BusState *qdev_get_child_bus(DeviceState *dev, const char *name)
{
    BusState *bus;

    LIST_FOREACH(bus, &dev->child_bus, sibling) {
        if (strcmp(name, bus->name) == 0) {
            return bus;
        }
    }
    return NULL;
}

static int next_scsi_bus;

/* Create a scsi bus, and attach devices to it.  */
/* TODO: Actually create a scsi bus for hotplug to use.  */
void scsi_bus_new(DeviceState *host, SCSIAttachFn attach)
{
   int bus = next_scsi_bus++;
   int unit;
   int index;

   for (unit = 0; unit < MAX_SCSI_DEVS; unit++) {
       index = drive_get_index(IF_SCSI, bus, unit);
       if (index == -1) {
           continue;
       }
       attach(host, drives_table[index].bdrv, unit);
   }
}

BusState *qbus_create(BusInfo *info, DeviceState *parent, const char *name)
{
    BusState *bus;

    bus = qemu_mallocz(info->size);
    bus->info = info;
    bus->parent = parent;
    bus->name = qemu_strdup(name);
    LIST_INIT(&bus->children);
    if (parent) {
        LIST_INSERT_HEAD(&parent->child_bus, bus, sibling);
    }
    return bus;
}

#define qdev_printf(fmt, ...) monitor_printf(mon, "%*s" fmt, indent, "", ## __VA_ARGS__)
static void qbus_print(Monitor *mon, BusState *bus, int indent);

static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
                             const char *prefix, int indent)
{
    char buf[64];

    if (!props)
        return;
    while (props->name) {
        if (props->info->print) {
            props->info->print(dev, props, buf, sizeof(buf));
            qdev_printf("%s-prop: %s = %s\n", prefix, props->name, buf);
        }
        props++;
    }
}

static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
{
    BusState *child;
    qdev_printf("dev: %s, id \"%s\"\n", dev->info->name,
                dev->id ? dev->id : "");
    indent += 2;
    if (dev->num_gpio_in) {
        qdev_printf("gpio-in %d\n", dev->num_gpio_in);
    }
    if (dev->num_gpio_out) {
        qdev_printf("gpio-out %d\n", dev->num_gpio_out);
    }
    qdev_print_props(mon, dev, dev->info->props, "dev", indent);
    qdev_print_props(mon, dev, dev->parent_bus->info->props, "bus", indent);
    if (dev->parent_bus->info->print_dev)
        dev->parent_bus->info->print_dev(mon, dev, indent);
    LIST_FOREACH(child, &dev->child_bus, sibling) {
        qbus_print(mon, child, indent);
    }
}

static void qbus_print(Monitor *mon, BusState *bus, int indent)
{
    struct DeviceState *dev;

    qdev_printf("bus: %s\n", bus->name);
    indent += 2;
    qdev_printf("type %s\n", bus->info->name);
    LIST_FOREACH(dev, &bus->children, sibling) {
        qdev_print(mon, dev, indent);
    }
}
#undef qdev_printf

void do_info_qtree(Monitor *mon)
{
    if (main_system_bus)
        qbus_print(mon, main_system_bus, 0);
}