acpi/piix4pm: convert ACPI PCI hotplug to use hotplug-handler API

Split piix4_device_hotplug() into hotplug/unplug callbacks
and register them as "hotplug-handler" interface implementation of
PIIX4_PM device.

Replace pci_bus_hotplug() wiring with setting link on
PCI BUS "hotplug-handler" property to PIIX4_PM device.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 22 insertions, 14 deletions

diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index 077776a6c9..9f21653e94 100644
--- a/hw/acpi/piix4.c
+++ b/hw/acpi/piix4.c
@@ -32,6 +32,7 @@
 #include "hw/acpi/piix4.h"
 #include "hw/acpi/pcihp.h"
 #include "hw/acpi/cpu_hotplug.h"
+#include "hw/hotplug.h"
 
 //#define DEBUG
 
@@ -44,8 +45,6 @@
 #define GPE_BASE 0xafe0
 #define GPE_LEN 4
 
-#define PIIX4_PCI_HOTPLUG_STATUS 2
-
 struct pci_status {
     uint32_t up; /* deprecated, maintained for migration compatibility */
     uint32_t down;
@@ -311,24 +310,26 @@ static void piix4_pm_powerdown_req(Notifier *n, void *opaque)
     acpi_pm1_evt_power_down(&s->ar);
 }
 
-static int piix4_acpi_pci_hotplug(DeviceState *qdev, PCIDevice *dev,
-                                  PCIHotplugState state)
+static void piix4_pci_device_plug_cb(HotplugHandler *hotplug_dev,
+                                     DeviceState *dev, Error **errp)
 {
-    PIIX4PMState *s = PIIX4_PM(qdev);
-    int ret = acpi_pcihp_device_hotplug(&s->acpi_pci_hotplug, dev, state);
-    if (ret < 0) {
-        return ret;
-    }
-    s->ar.gpe.sts[0] |= PIIX4_PCI_HOTPLUG_STATUS;
+    PIIX4PMState *s = PIIX4_PM(hotplug_dev);
+    acpi_pcihp_device_plug_cb(&s->ar, s->irq, &s->acpi_pci_hotplug, dev, errp);
+}
 
-    acpi_update_sci(&s->ar, s->irq);
-    return 0;
+static void piix4_pci_device_unplug_cb(HotplugHandler *hotplug_dev,
+                                       DeviceState *dev, Error **errp)
+{
+    PIIX4PMState *s = PIIX4_PM(hotplug_dev);
+    acpi_pcihp_device_unplug_cb(&s->ar, s->irq, &s->acpi_pci_hotplug, dev,
+                                errp);
 }
 
-static void piix4_update_bus_hotplug(PCIBus *bus, void *opaque)
+static void piix4_update_bus_hotplug(PCIBus *pci_bus, void *opaque)
 {
     PIIX4PMState *s = opaque;
-    pci_bus_hotplug(bus, piix4_acpi_pci_hotplug, DEVICE(s));
+
+    qbus_set_hotplug_handler(BUS(pci_bus), DEVICE(s), &error_abort);
 }
 
 static void piix4_pm_machine_ready(Notifier *n, void *opaque)
@@ -535,6 +536,7 @@ static void piix4_pm_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
+    HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
 
     k->init = piix4_pm_initfn;
     k->config_write = pm_write_config;
@@ -551,6 +553,8 @@ static void piix4_pm_class_init(ObjectClass *klass, void *data)
      */
     dc->cannot_instantiate_with_device_add_yet = true;
     dc->hotpluggable = false;
+    hc->plug = piix4_pci_device_plug_cb;
+    hc->unplug = piix4_pci_device_unplug_cb;
 }
 
 static const TypeInfo piix4_pm_info = {
@@ -558,6 +562,10 @@ static const TypeInfo piix4_pm_info = {
     .parent        = TYPE_PCI_DEVICE,
     .instance_size = sizeof(PIIX4PMState),
     .class_init    = piix4_pm_class_init,
+    .interfaces = (InterfaceInfo[]) {
+        { TYPE_HOTPLUG_HANDLER },
+        { }
+    }
 };
 
 static void piix4_pm_register_types(void)