The previous patch moved virtual css bridge and bus out from virtio-ccw, but kept the direct reference of virtio-ccw specific unplug function inside css-bridge.c. To make the virtual css bus and bridge useful for non-virtio devices, this introduces a common unplug function pointer "unplug" to call specific virtio-ccw unplug parts. Thus, the tight coupling to virtio-ccw can be removed. This unplug pointer is a member of CCWDeviceClass, which is introduced as an abstract device layer called "ccw-device". This layer is between DeviceState and specific devices which are plugged in virtual css bus, like virtio-ccw device. The specific unplug handlers should be assigned to "unplug" during initialization. Signed-off-by: Jing Liu <liujbjl@linux.vnet.ibm.com> Reviewed-by: Sascha Silbe <silbe@linux.vnet.ibm.com> Reviewed-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com> Reviewed-by: Yi Min Zhao <zyimin@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
/*
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* Common device infrastructure for devices in the virtual css
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*
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* Copyright 2016 IBM Corp.
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* Author(s): Jing Liu <liujbjl@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at
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* your option) any later version. See the COPYING file in the top-level
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* directory.
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*/
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#ifndef HW_S390X_CCW_DEVICE_H
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#define HW_S390X_CCW_DEVICE_H
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#include "qom/object.h"
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#include "hw/qdev-core.h"
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#include "hw/s390x/css.h"
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typedef struct CcwDevice {
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DeviceState parent_obj;
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SubchDev *sch;
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/* <cssid>.<ssid>.<device number> */
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CssDevId bus_id;
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} CcwDevice;
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typedef struct CCWDeviceClass {
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DeviceClass parent_class;
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void (*unplug)(HotplugHandler *, DeviceState *, Error **);
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} CCWDeviceClass;
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static inline CcwDevice *to_ccw_dev_fast(DeviceState *d)
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{
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return container_of(d, CcwDevice, parent_obj);
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}
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#define TYPE_CCW_DEVICE "ccw-device"
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#define CCW_DEVICE(obj) OBJECT_CHECK(CcwDevice, (obj), TYPE_CCW_DEVICE)
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#define CCW_DEVICE_GET_CLASS(obj) \
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OBJECT_GET_CLASS(CCWDeviceClass, (obj), TYPE_CCW_DEVICE)
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#define CCW_DEVICE_CLASS(klass) \
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OBJECT_CLASS_CHECK(CCWDeviceClass, (klass), TYPE_CCW_DEVICE)
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#endif
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