[Qemu-devel] [PATCH 13/25] qdev: replace bus properties with superclass properties

[Paolo Bonzini <pbonzini@redhat.com>]

After the previous patch, this one changes all bus property walks to
look along the class hierarchy instead.  Bus properties are moved to
abstract classes.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/i2c.c                      |    2 +-
 hw/ide/qdev.c                 |    2 +-
 hw/intel-hda.c                |    2 +-
 hw/pci.c                      |    2 +-
 hw/qdev-monitor.c             |   41 ++++++++++++++++++-----------------------
 hw/qdev-properties.c          |   17 +++++++++--------
 hw/qdev.c                     |   32 +++++++++-----------------------
 hw/qdev.h                     |    5 -----
 hw/scsi-bus.c                 |    2 +-
 hw/spapr_vio.c                |    2 +-
 hw/usb/bus.c                  |    2 +-
 hw/usb/dev-smartcard-reader.c |    2 +-
 hw/virtio-serial-bus.c        |    2 +-
 13 files changed, 45 insertions(+), 68 deletions(-)

diff --git a/hw/i2c.c b/hw/i2c.c
index cb10b1d..af5979e 100644
--- a/hw/i2c.c
+++ b/hw/i2c.c
@@ -25,7 +25,6 @@ static Property i2c_props[] = {
 static struct BusInfo i2c_bus_info = {
     .name = "I2C",
     .size = sizeof(i2c_bus),
-    .props = i2c_props,
 };
 
 static void i2c_bus_pre_save(void *opaque)
@@ -221,6 +220,7 @@ static void i2c_slave_class_init(ObjectClass *klass, void *data)
     DeviceClass *k = DEVICE_CLASS(klass);
     k->init = i2c_slave_qdev_init;
     k->bus_info = &i2c_bus_info;
+    k->props = i2c_props;
 }
 
 static TypeInfo i2c_slave_type_info = {
diff --git a/hw/ide/qdev.c b/hw/ide/qdev.c
index 4d372f8..27ff47c 100644
--- a/hw/ide/qdev.c
+++ b/hw/ide/qdev.c
@@ -36,7 +36,6 @@ static struct BusInfo ide_bus_info = {
     .name  = "IDE",
     .size  = sizeof(IDEBus),
     .get_fw_dev_path = idebus_get_fw_dev_path,
-    .props = ide_props,
 };
 
 void ide_bus_new(IDEBus *idebus, DeviceState *dev, int bus_id)
@@ -248,6 +247,7 @@ static void ide_device_class_init(ObjectClass *klass, void *data)
     DeviceClass *k = DEVICE_CLASS(klass);
     k->init = ide_qdev_init;
     k->bus_info = &ide_bus_info;
+    k->props = ide_props;
 }
 
 static TypeInfo ide_device_type_info = {
diff --git a/hw/intel-hda.c b/hw/intel-hda.c
index 0994f6b..e2bd41e 100644
--- a/hw/intel-hda.c
+++ b/hw/intel-hda.c
@@ -37,7 +37,6 @@ static Property hda_props[] = {
 static struct BusInfo hda_codec_bus_info = {
     .name      = "HDA",
     .size      = sizeof(HDACodecBus),
-    .props     = hda_props,
 };
 
 void hda_codec_bus_init(DeviceState *dev, HDACodecBus *bus,
@@ -1278,6 +1277,7 @@ static void hda_codec_device_class_init(ObjectClass *klass, void *data)
     k->init = hda_codec_dev_init;
     k->exit = hda_codec_dev_exit;
     k->bus_info = &hda_codec_bus_info;
+    k->props = hda_props;
 }
 
 static TypeInfo hda_codec_device_type_info = {
diff --git a/hw/pci.c b/hw/pci.c
index fff4c4a..4e8e726 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -62,7 +62,6 @@ struct BusInfo pci_bus_info = {
     .get_dev_path = pcibus_get_dev_path,
     .get_fw_dev_path = pcibus_get_fw_dev_path,
     .reset      = pcibus_reset,
-    .props      = pci_props,
 };
 
 static void pci_update_mappings(PCIDevice *d);
@@ -2004,6 +2003,7 @@ static void pci_device_class_init(ObjectClass *klass, void *data)
     k->unplug = pci_unplug_device;
     k->exit = pci_unregister_device;
     k->bus_info = &pci_bus_info;
+    k->props = pci_props;
 }
 
 static TypeInfo pci_device_type_info = {
diff --git a/hw/qdev-monitor.c b/hw/qdev-monitor.c
index 3d95940..d4fc843 100644
--- a/hw/qdev-monitor.c
+++ b/hw/qdev-monitor.c
@@ -122,7 +122,6 @@ int qdev_device_help(QemuOpts *opts)
     const char *driver;
     Property *prop;
     ObjectClass *klass;
-    DeviceClass *info;
 
     driver = qemu_opt_get(opts, "driver");
     if (driver && !strcmp(driver, "?")) {
@@ -148,30 +147,22 @@ int qdev_device_help(QemuOpts *opts)
     if (!klass) {
         return 0;
     }
-    info = DEVICE_CLASS(klass);
-
-    for (prop = info->props; prop && prop->name; prop++) {
-        /*
-         * TODO Properties without a parser are just for dirty hacks.
-         * qdev_prop_ptr is the only such PropertyInfo.  It's marked
-         * for removal.  This conditional should be removed along with
-         * it.
-         */
-        if (!prop->info->set) {
-            continue;           /* no way to set it, don't show */
-        }
-        error_printf("%s.%s=%s\n", driver, prop->name,
-                     prop->info->legacy_name ?: prop->info->name);
-    }
-    if (info->bus_info) {
-        for (prop = info->bus_info->props; prop && prop->name; prop++) {
+    do {
+        for (prop = DEVICE_CLASS(klass)->props; prop && prop->name; prop++) {
+            /*
+             * TODO Properties without a parser are just for dirty hacks.
+             * qdev_prop_ptr is the only such PropertyInfo.  It's marked
+             * for removal.  This conditional should be removed along with
+             * it.
+             */
             if (!prop->info->set) {
                 continue;           /* no way to set it, don't show */
             }
             error_printf("%s.%s=%s\n", driver, prop->name,
                          prop->info->legacy_name ?: prop->info->name);
         }
-    }
+        klass = object_class_get_parent(klass);
+    } while (klass != object_class_by_name(TYPE_DEVICE));
     return 1;
 }
 
@@ -480,7 +471,7 @@ DeviceState *qdev_device_add(QemuOpts *opts)
 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)
+                             int indent)
 {
     if (!props)
         return;
@@ -499,7 +490,7 @@ static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
             error_free(err);
             continue;
         }
-        qdev_printf("%s-prop: %s = %s\n", prefix, props->name,
+        qdev_printf("%s = %s\n", props->name,
                     value && *value ? value : "<null>");
         g_free(value);
     }
@@ -507,6 +498,7 @@ static void qdev_print_props(Monitor *mon, DeviceState *dev, Property *props,
 
 static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
 {
+    ObjectClass *class;
     BusState *child;
     qdev_printf("dev: %s, id \"%s\"\n", object_get_typename(OBJECT(dev)),
                 dev->id ? dev->id : "");
@@ -517,8 +509,11 @@ static void qdev_print(Monitor *mon, DeviceState *dev, int indent)
     if (dev->num_gpio_out) {
         qdev_printf("gpio-out %d\n", dev->num_gpio_out);
     }
-    qdev_print_props(mon, dev, qdev_get_props(dev), "dev", indent);
-    qdev_print_props(mon, dev, dev->parent_bus->info->props, "bus", indent);
+    class = object_get_class(OBJECT(dev));
+    do {
+        qdev_print_props(mon, dev, DEVICE_CLASS(class)->props, indent);
+        class = object_class_get_parent(class);
+    } while (class != object_class_by_name(TYPE_DEVICE));
     if (dev->parent_bus->info->print_dev)
         dev->parent_bus->info->print_dev(mon, dev, indent);
     QLIST_FOREACH(child, &dev->child_bus, sibling) {
diff --git a/hw/qdev-properties.c b/hw/qdev-properties.c
index a9276f9..60fef9a 100644
--- a/hw/qdev-properties.c
+++ b/hw/qdev-properties.c
@@ -893,17 +893,18 @@ static Property *qdev_prop_walk(Property *props, const char *name)
 
 static Property *qdev_prop_find(DeviceState *dev, const char *name)
 {
+    ObjectClass *class;
     Property *prop;
 
     /* device properties */
-    prop = qdev_prop_walk(qdev_get_props(dev), name);
-    if (prop)
-        return prop;
-
-    /* bus properties */
-    prop = qdev_prop_walk(dev->parent_bus->info->props, name);
-    if (prop)
-        return prop;
+    class = object_get_class(OBJECT(dev));
+    do {
+        prop = qdev_prop_walk(DEVICE_CLASS(class)->props, name);
+        if (prop) {
+            return prop;
+        }
+        class = object_class_get_parent(class);
+    } while (class != object_class_by_name(TYPE_DEVICE));
 
     return NULL;
 }
diff --git a/hw/qdev.c b/hw/qdev.c
index adef566..aeebb86 100644
--- a/hw/qdev.c
+++ b/hw/qdev.c
@@ -44,18 +44,6 @@ const VMStateDescription *qdev_get_vmsd(DeviceState *dev)
     return dc->vmsd;
 }
 
-BusInfo *qdev_get_bus_info(DeviceState *dev)
-{
-    DeviceClass *dc = DEVICE_GET_CLASS(dev);
-    return dc->bus_info;
-}
-
-Property *qdev_get_props(DeviceState *dev)
-{
-    DeviceClass *dc = DEVICE_GET_CLASS(dev);
-    return dc->props;
-}
-
 const char *qdev_fw_name(DeviceState *dev)
 {
     DeviceClass *dc = DEVICE_GET_CLASS(dev);
@@ -77,19 +65,12 @@ static void qdev_property_add_legacy(DeviceState *dev, Property *prop,
 
 void qdev_set_parent_bus(DeviceState *dev, BusState *bus)
 {
-    Property *prop;
-
     if (qdev_hotplug) {
         assert(bus->allow_hotplug);
     }
 
     dev->parent_bus = bus;
     QTAILQ_INSERT_HEAD(&bus->children, dev, sibling);
-
-    for (prop = qdev_get_bus_info(dev)->props; prop && prop->name; prop++) {
-        qdev_property_add_legacy(dev, prop, NULL);
-        qdev_property_add_static(dev, prop, NULL);
-    }
 }
 
 /* Create a new device.  This only initializes the device state structure
@@ -629,6 +610,7 @@ void qdev_property_add_static(DeviceState *dev, Property *prop,
 static void device_initfn(Object *obj)
 {
     DeviceState *dev = DEVICE(obj);
+    ObjectClass *class;
     Property *prop;
 
     if (qdev_hotplug) {
@@ -639,10 +621,14 @@ static void device_initfn(Object *obj)
     dev->instance_id_alias = -1;
     dev->state = DEV_STATE_CREATED;
 
-    for (prop = qdev_get_props(dev); prop && prop->name; prop++) {
-        qdev_property_add_legacy(dev, prop, NULL);
-        qdev_property_add_static(dev, prop, NULL);
-    }
+    class = object_get_class(OBJECT(dev));
+    do {
+        for (prop = DEVICE_CLASS(class)->props; prop && prop->name; prop++) {
+            qdev_property_add_legacy(dev, prop, NULL);
+            qdev_property_add_static(dev, prop, NULL);
+        }
+        class = object_class_get_parent(class);
+    } while (class != object_class_by_name(TYPE_DEVICE));
     qdev_prop_set_globals(dev);
 }
 
diff --git a/hw/qdev.h b/hw/qdev.h
index 12de112..aea53c8 100644
--- a/hw/qdev.h
+++ b/hw/qdev.h
@@ -95,7 +95,6 @@ struct BusInfo {
     bus_get_dev_path get_dev_path;
     bus_get_fw_dev_path get_fw_dev_path;
     qbus_resetfn *reset;
-    Property *props;
 };
 
 struct BusState {
@@ -344,10 +343,6 @@ const VMStateDescription *qdev_get_vmsd(DeviceState *dev);
 
 const char *qdev_fw_name(DeviceState *dev);
 
-BusInfo *qdev_get_bus_info(DeviceState *dev);
-
-Property *qdev_get_props(DeviceState *dev);
-
 Object *qdev_get_machine(void);
 
 /* FIXME: make this a link<> */
diff --git a/hw/scsi-bus.c b/hw/scsi-bus.c
index 0352c59..10f9c63 100644
--- a/hw/scsi-bus.c
+++ b/hw/scsi-bus.c
@@ -24,7 +24,6 @@ static struct BusInfo scsi_bus_info = {
     .size  = sizeof(SCSIBus),
     .get_dev_path = scsibus_get_dev_path,
     .get_fw_dev_path = scsibus_get_fw_dev_path,
-    .props = scsi_props,
 };
 static int next_scsi_bus;
 
@@ -1575,6 +1574,7 @@ static void scsi_device_class_init(ObjectClass *klass, void *data)
     k->init     = scsi_qdev_init;
     k->unplug   = qdev_simple_unplug_cb;
     k->exit     = scsi_qdev_exit;
+    k->props    = scsi_props;
 }
 
 static TypeInfo scsi_device_type_info = {
diff --git a/hw/spapr_vio.c b/hw/spapr_vio.c
index 941a013..897c057 100644
--- a/hw/spapr_vio.c
+++ b/hw/spapr_vio.c
@@ -57,7 +57,6 @@ static Property spapr_vio_props[] = {
 static struct BusInfo spapr_vio_bus_info = {
     .name       = "spapr-vio",
     .size       = sizeof(VIOsPAPRBus),
-    .props      = spapr_vio_props,
 };
 
 VIOsPAPRDevice *spapr_vio_find_by_reg(VIOsPAPRBus *bus, uint32_t reg)
@@ -769,6 +768,7 @@ static void vio_spapr_device_class_init(ObjectClass *klass, void *data)
     DeviceClass *k = DEVICE_CLASS(klass);
     k->init = spapr_vio_busdev_init;
     k->bus_info = &spapr_vio_bus_info;
+    k->props = spapr_vio_props;
 }
 
 static TypeInfo spapr_vio_type_info = {
diff --git a/hw/usb/bus.c b/hw/usb/bus.c
index 0271bc0..12d1be0 100644
--- a/hw/usb/bus.c
+++ b/hw/usb/bus.c
@@ -22,7 +22,6 @@ static struct BusInfo usb_bus_info = {
     .print_dev = usb_bus_dev_print,
     .get_dev_path = usb_get_dev_path,
     .get_fw_dev_path = usb_get_fw_dev_path,
-    .props     = usb_props,
 };
 
 static int next_usb_bus = 0;
@@ -568,6 +567,7 @@ static void usb_device_class_init(ObjectClass *klass, void *data)
     k->init     = usb_qdev_init;
     k->unplug   = qdev_simple_unplug_cb;
     k->exit     = usb_qdev_exit;
+    k->props    = usb_props;
 }
 
 static TypeInfo usb_device_type_info = {
diff --git a/hw/usb/dev-smartcard-reader.c b/hw/usb/dev-smartcard-reader.c
index 4a9cc16..a38a948 100644
--- a/hw/usb/dev-smartcard-reader.c
+++ b/hw/usb/dev-smartcard-reader.c
@@ -1063,7 +1063,6 @@ static Property ccid_props[] = {
 static struct BusInfo ccid_bus_info = {
     .name = "ccid-bus",
     .size = sizeof(CCIDBus),
-    .props = ccid_props,
 };
 
 void ccid_card_send_apdu_to_guest(CCIDCardState *card,
@@ -1346,6 +1345,7 @@ static void ccid_card_class_init(ObjectClass *klass, void *data)
     k->bus_info = &ccid_bus_info;
     k->init = ccid_card_init;
     k->exit = ccid_card_exit;
+    k->props = ccid_props;
 }
 
 static TypeInfo ccid_card_type_info = {
diff --git a/hw/virtio-serial-bus.c b/hw/virtio-serial-bus.c
index 703c08d..6d49ad6 100644
--- a/hw/virtio-serial-bus.c
+++ b/hw/virtio-serial-bus.c
@@ -687,7 +687,6 @@ static struct BusInfo virtser_bus_info = {
     .name      = "virtio-serial-bus",
     .size      = sizeof(VirtIOSerialBus),
     .print_dev = virtser_bus_dev_print,
-    .props     = virtser_props,
 };
 
 static void virtser_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent)
@@ -940,6 +939,7 @@ static void virtio_serial_port_class_init(ObjectClass *klass, void *data)
     k->bus_info = &virtser_bus_info;
     k->exit = virtser_port_qdev_exit;
     k->unplug = qdev_simple_unplug_cb;
+    k->props = virtser_props;
 }
 
 static TypeInfo virtio_serial_port_type_info = {
-- 
1.7.9.3