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[Qemu-devel] [PULL 11/20] define hotplug interface
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] [PULL 11/20] define hotplug interface |
Date: |
Mon, 10 Feb 2014 18:48:18 +0200 |
From: Igor Mammedov <address@hidden>
Provide a generic hotplug interface for hotplug handlers.
Intended for replacing hotplug mechanism used by
PCI/PCIE/SHPC code and will be used for memory hotplug.
Signed-off-by: Igor Mammedov <address@hidden>
Reviewed-by: Michael S. Tsirkin <address@hidden>
Signed-off-by: Michael S. Tsirkin <address@hidden>
---
include/hw/hotplug.h | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++
hw/core/hotplug.c | 48 +++++++++++++++++++++++++++++++
hw/core/Makefile.objs | 1 +
3 files changed, 127 insertions(+)
create mode 100644 include/hw/hotplug.h
create mode 100644 hw/core/hotplug.c
diff --git a/include/hw/hotplug.h b/include/hw/hotplug.h
new file mode 100644
index 0000000..a6533cb
--- /dev/null
+++ b/include/hw/hotplug.h
@@ -0,0 +1,78 @@
+/*
+ * Hotplug handler interface.
+ *
+ * Copyright (c) 2014 Red Hat Inc.
+ *
+ * Authors:
+ * Igor Mammedov <address@hidden>,
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+#ifndef HOTPLUG_H
+#define HOTPLUG_H
+
+#include "qom/object.h"
+#include "qemu/typedefs.h"
+
+#define TYPE_HOTPLUG_HANDLER "hotplug-handler"
+
+#define HOTPLUG_HANDLER_CLASS(klass) \
+ OBJECT_CLASS_CHECK(HotplugHandlerClass, (klass), TYPE_HOTPLUG_HANDLER)
+#define HOTPLUG_HANDLER_GET_CLASS(obj) \
+ OBJECT_GET_CLASS(HotplugHandlerClass, (obj), TYPE_HOTPLUG_HANDLER)
+#define HOTPLUG_HANDLER(obj) \
+ INTERFACE_CHECK(HotplugHandler, (obj), TYPE_HOTPLUG_HANDLER)
+
+
+typedef struct HotplugHandler {
+ /* <private> */
+ Object Parent;
+} HotplugHandler;
+
+/**
+ * hotplug_fn:
+ * @plug_handler: a device performing plug/uplug action
+ * @plugged_dev: a device that has been (un)plugged
+ * @errp: returns an error if this function fails
+ */
+typedef void (*hotplug_fn)(HotplugHandler *plug_handler,
+ DeviceState *plugged_dev, Error **errp);
+
+/**
+ * HotplugDeviceClass:
+ *
+ * Interface to be implemented by a device performing
+ * hardware (un)plug functions.
+ *
+ * @parent: Opaque parent interface.
+ * @plug: plug callback.
+ * @unplug: unplug callback.
+ */
+typedef struct HotplugHandlerClass {
+ /* <private> */
+ InterfaceClass parent;
+
+ /* <public> */
+ hotplug_fn plug;
+ hotplug_fn unplug;
+} HotplugHandlerClass;
+
+/**
+ * hotplug_handler_plug:
+ *
+ * Call #HotplugHandlerClass.plug callback of @plug_handler.
+ */
+void hotplug_handler_plug(HotplugHandler *plug_handler,
+ DeviceState *plugged_dev,
+ Error **errp);
+
+/**
+ * hotplug_handler_unplug:
+ *
+ * Call #HotplugHandlerClass.unplug callback of @plug_handler.
+ */
+void hotplug_handler_unplug(HotplugHandler *plug_handler,
+ DeviceState *plugged_dev,
+ Error **errp);
+#endif
diff --git a/hw/core/hotplug.c b/hw/core/hotplug.c
new file mode 100644
index 0000000..5573d9d
--- /dev/null
+++ b/hw/core/hotplug.c
@@ -0,0 +1,48 @@
+/*
+ * Hotplug handler interface.
+ *
+ * Copyright (c) 2014 Red Hat Inc.
+ *
+ * Authors:
+ * Igor Mammedov <address@hidden>,
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+#include "hw/hotplug.h"
+#include "qemu/module.h"
+
+void hotplug_handler_plug(HotplugHandler *plug_handler,
+ DeviceState *plugged_dev,
+ Error **errp)
+{
+ HotplugHandlerClass *hdc = HOTPLUG_HANDLER_GET_CLASS(plug_handler);
+
+ if (hdc->plug) {
+ hdc->plug(plug_handler, plugged_dev, errp);
+ }
+}
+
+void hotplug_handler_unplug(HotplugHandler *plug_handler,
+ DeviceState *plugged_dev,
+ Error **errp)
+{
+ HotplugHandlerClass *hdc = HOTPLUG_HANDLER_GET_CLASS(plug_handler);
+
+ if (hdc->unplug) {
+ hdc->unplug(plug_handler, plugged_dev, errp);
+ }
+}
+
+static const TypeInfo hotplug_handler_info = {
+ .name = TYPE_HOTPLUG_HANDLER,
+ .parent = TYPE_INTERFACE,
+ .class_size = sizeof(HotplugHandlerClass),
+};
+
+static void hotplug_handler_register_types(void)
+{
+ type_register_static(&hotplug_handler_info);
+}
+
+type_init(hotplug_handler_register_types)
diff --git a/hw/core/Makefile.objs b/hw/core/Makefile.objs
index 950146c..9e324be 100644
--- a/hw/core/Makefile.objs
+++ b/hw/core/Makefile.objs
@@ -2,6 +2,7 @@
common-obj-y += qdev.o qdev-properties.o
# irq.o needed for qdev GPIO handling:
common-obj-y += irq.o
+common-obj-y += hotplug.o
common-obj-$(CONFIG_EMPTY_SLOT) += empty_slot.o
common-obj-$(CONFIG_XILINX_AXI) += stream.o
--
MST
- [Qemu-devel] [PULL 01/20] pcihp: reduce number of device check events, (continued)
- [Qemu-devel] [PULL 01/20] pcihp: reduce number of device check events, Michael S. Tsirkin, 2014/02/10
- [Qemu-devel] [PULL 03/20] pcihp: make PCI hotplug mmio handlers indifferent to PCI_HOTPLUG_ADDR, Michael S. Tsirkin, 2014/02/10
- [Qemu-devel] [PULL 04/20] pcihp: make pci_read() mmio calback compatible with legacy ACPI hotplug, Michael S. Tsirkin, 2014/02/10
- [Qemu-devel] [PULL 02/20] pcihp: replace enable|disable_device() with oneliners, Michael S. Tsirkin, 2014/02/10
- [Qemu-devel] [PULL 06/20] hw:piix4:acpi: reuse pcihp code for legacy PCI hotplug, Michael S. Tsirkin, 2014/02/10
- [Qemu-devel] [PULL 05/20] pcihp: remove unused AcpiPciHpPciStatus.device_present field, Michael S. Tsirkin, 2014/02/10
- [Qemu-devel] [PULL 07/20] qtest: don't report signals if qtest driver enabled, Michael S. Tsirkin, 2014/02/10
- [Qemu-devel] [PULL 08/20] pc_piix: enable legacy hotplug for Xen, Michael S. Tsirkin, 2014/02/10
- [Qemu-devel] [PULL 10/20] loader: document that errno is set, Michael S. Tsirkin, 2014/02/10
- [Qemu-devel] [PULL 09/20] pc.c: better error message on initrd sizing failure, Michael S. Tsirkin, 2014/02/10
- [Qemu-devel] [PULL 11/20] define hotplug interface,
Michael S. Tsirkin <=
- [Qemu-devel] [PULL 12/20] qdev: add to BusState "hotplug-handler" link, Michael S. Tsirkin, 2014/02/10
- [Qemu-devel] [PULL 13/20] qdev: add "hotpluggable" property to Device, Michael S. Tsirkin, 2014/02/10
- [Qemu-devel] [PULL 14/20] hw/acpi: move typeinfo to the file end, Michael S. Tsirkin, 2014/02/10
- [Qemu-devel] [PULL 15/20] qdev:pci: refactor PCIDevice to use generic "hotpluggable" property, Michael S. Tsirkin, 2014/02/10
- [Qemu-devel] [PULL 16/20] acpi/piix4pm: convert ACPI PCI hotplug to use hotplug-handler API, Michael S. Tsirkin, 2014/02/10
- [Qemu-devel] [PULL 17/20] pci/shpc: convert SHPC hotplug to use hotplug-handler API, Michael S. Tsirkin, 2014/02/10
- [Qemu-devel] [PULL 18/20] pci/pcie: convert PCIE hotplug to use hotplug-handler API, Michael S. Tsirkin, 2014/02/10
- [Qemu-devel] [PULL 19/20] hw/pci: switch to a generic hotplug handling for PCIDevice, Michael S. Tsirkin, 2014/02/10