X-Git-Url: http://git.maemo.org/git/?p=qemu;a=blobdiff_plain;f=hw%2Fqdev.c;fp=hw%2Fqdev.c;h=5175fe17fd66d219c55d6261e4a25a132b7e45fe;hp=0000000000000000000000000000000000000000;hb=a03c3bde4e288e790eccfb8cd45abd8ecbf467dc;hpb=e2ffa1bf065fa199f27d661d495573e9d6059bf1

diff --git a/hw/qdev.c b/hw/qdev.c
new file mode 100644
index 0000000..5175fe1
--- /dev/null
+++ b/hw/qdev.c
@@ -0,0 +1,412 @@
+/*
+ *  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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA  02110-1301 USA
+ */
+
+/* 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"
+
+struct DeviceProperty {
+    const char *name;
+    DevicePropType type;
+    union {
+        uint64_t i;
+        void *ptr;
+    } value;
+    DeviceProperty *next;
+};
+
+struct DeviceType {
+    const char *name;
+    DeviceInfo *info;
+    int size;
+    DeviceType *next;
+};
+
+/* This is a nasty hack to allow passing a NULL bus to qdev_create.  */
+BusState *main_system_bus;
+
+static DeviceType *device_type_list;
+
+/* Register a new device type.  */
+void qdev_register(const char *name, int size, DeviceInfo *info)
+{
+    DeviceType *t;
+
+    assert(size >= sizeof(DeviceState));
+
+    t = qemu_mallocz(sizeof(DeviceType));
+    t->next = device_type_list;
+    device_type_list = t;
+    t->name = qemu_strdup(name);
+    t->size = size;
+    t->info = info;
+}
+
+/* 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)
+{
+    DeviceType *t;
+    DeviceState *dev;
+
+    for (t = device_type_list; t; t = t->next) {
+        if (strcmp(t->name, name) == 0) {
+            break;
+        }
+    }
+    if (!t) {
+        hw_error("Unknown device '%s'\n", name);
+    }
+
+    dev = qemu_mallocz(t->size);
+    dev->type = t;
+
+    if (!bus) {
+        /* ???: This assumes system busses have no additional state.  */
+        if (!main_system_bus) {
+            main_system_bus = qbus_create(BUS_TYPE_SYSTEM, sizeof(BusState),
+                                          NULL, "main-system-bus");
+        }
+        bus = main_system_bus;
+    }
+    if (t->info->bus_type != bus->type) {
+        /* TODO: Print bus type names.  */
+        hw_error("Device '%s' on wrong bus type (%d/%d)", name,
+                 t->info->bus_type, bus->type);
+    }
+    dev->parent_bus = bus;
+    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->type->info->init(dev, dev->type->info);
+}
+
+/* Unlink device from bus and free the structure.  */
+void qdev_free(DeviceState *dev)
+{
+    LIST_REMOVE(dev, sibling);
+    free(dev);
+}
+
+static DeviceProperty *create_prop(DeviceState *dev, const char *name,
+                                   DevicePropType type)
+{
+    DeviceProperty *prop;
+
+    /* TODO: Check for duplicate properties.  */
+    prop = qemu_mallocz(sizeof(*prop));
+    prop->name = qemu_strdup(name);
+    prop->type = type;
+    prop->next = dev->props;
+    dev->props = prop;
+
+    return prop;
+}
+
+void qdev_set_prop_int(DeviceState *dev, const char *name, uint64_t value)
+{
+    DeviceProperty *prop;
+
+    prop = create_prop(dev, name, PROP_TYPE_INT);
+    prop->value.i = value;
+}
+
+void qdev_set_prop_dev(DeviceState *dev, const char *name, DeviceState *value)
+{
+    DeviceProperty *prop;
+
+    prop = create_prop(dev, name, PROP_TYPE_DEV);
+    prop->value.ptr = value;
+}
+
+void qdev_set_prop_ptr(DeviceState *dev, const char *name, void *value)
+{
+    DeviceProperty *prop;
+
+    prop = create_prop(dev, name, PROP_TYPE_PTR);
+    prop->value.ptr = value;
+}
+
+void qdev_set_netdev(DeviceState *dev, NICInfo *nd)
+{
+    assert(!dev->nd);
+    dev->nd = nd;
+}
+
+
+/* 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->type->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;
+}
+
+static DeviceProperty *find_prop(DeviceState *dev, const char *name,
+                                 DevicePropType type)
+{
+    DeviceProperty *prop;
+
+    for (prop = dev->props; prop; prop = prop->next) {
+        if (strcmp(prop->name, name) == 0) {
+            assert (prop->type == type);
+            return prop;
+        }
+    }
+    return NULL;
+}
+
+uint64_t qdev_get_prop_int(DeviceState *dev, const char *name, uint64_t def)
+{
+    DeviceProperty *prop;
+
+    prop = find_prop(dev, name, PROP_TYPE_INT);
+    if (!prop) {
+        return def;
+    }
+
+    return prop->value.i;
+}
+
+void *qdev_get_prop_ptr(DeviceState *dev, const char *name)
+{
+    DeviceProperty *prop;
+
+    prop = find_prop(dev, name, PROP_TYPE_PTR);
+    assert(prop);
+    return prop->value.ptr;
+}
+
+DeviceState *qdev_get_prop_dev(DeviceState *dev, const char *name)
+{
+    DeviceProperty *prop;
+
+    prop = find_prop(dev, name, PROP_TYPE_DEV);
+    if (!prop) {
+        return NULL;
+    }
+    return prop->value.ptr;
+}
+
+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,
+                                      IOReadHandler *fd_read,
+                                      IOCanRWHandler *fd_can_read,
+                                      NetCleanup *cleanup,
+                                      void *opaque)
+{
+    NICInfo *nd = dev->nd;
+    assert(nd);
+    return qemu_new_vlan_client(nd->vlan, nd->model, nd->name,
+                                fd_read, fd_can_read, cleanup, opaque);
+}
+
+
+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(BusType type, size_t size,
+                      DeviceState *parent, const char *name)
+{
+    BusState *bus;
+
+    bus = qemu_mallocz(size);
+    bus->type = type;
+    bus->parent = parent;
+    bus->name = qemu_strdup(name);
+    LIST_INIT(&bus->children);
+    if (parent) {
+        LIST_INSERT_HEAD(&parent->child_bus, bus, sibling);
+    }
+    return bus;
+}
+
+static const char *bus_type_names[] = {
+    "System",
+    "PCI",
+    "SCSI",
+    "I2C",
+    "SSI"
+};
+
+#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(Monitor *mon, DeviceState *dev, int indent)
+{
+    DeviceProperty *prop;
+    BusState *child;
+    qdev_printf("dev: %s\n", dev->type->name);
+    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);
+    }
+    for (prop = dev->props; prop; prop = prop->next) {
+        switch (prop->type) {
+        case PROP_TYPE_INT:
+            qdev_printf("prop-int %s 0x%" PRIx64 "\n", prop->name,
+                        prop->value.i);
+            break;
+        case PROP_TYPE_PTR:
+            qdev_printf("prop-ptr %s\n", prop->name);
+            break;
+        case PROP_TYPE_DEV:
+            qdev_printf("prop-dev %s %s\n", prop->name,
+                        ((DeviceState *)prop->value.ptr)->type->name);
+            break;
+        default:
+            qdev_printf("prop-unknown%d %s\n", prop->type, prop->name);
+            break;
+        }
+    }
+    switch (dev->parent_bus->type) {
+    case BUS_TYPE_SYSTEM:
+        sysbus_dev_print(mon, dev, indent);
+        break;
+    default:
+        break;
+    }
+    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_type_names[bus->type]);
+    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);
+}