xref: /openbmc/qemu/hw/s390x/ccw-device.c (revision 988717b46b6424907618cb845ace9d69062703af)
1  /*
2   * Common device infrastructure for devices in the virtual css
3   *
4   * Copyright 2016 IBM Corp.
5   * Author(s): Jing Liu <liujbjl@linux.vnet.ibm.com>
6   *
7   * This work is licensed under the terms of the GNU GPL, version 2 or (at
8   * your option) any later version. See the COPYING file in the top-level
9   * directory.
10   */
11  
12  #include "qemu/osdep.h"
13  #include "ccw-device.h"
14  #include "hw/qdev-properties.h"
15  #include "qemu/module.h"
16  
17  static void ccw_device_refill_ids(CcwDevice *dev)
18  {
19      SubchDev *sch = dev->sch;
20  
21      assert(sch);
22  
23      dev->dev_id.cssid = sch->cssid;
24      dev->dev_id.ssid = sch->ssid;
25      dev->dev_id.devid = sch->devno;
26      dev->dev_id.valid = true;
27  
28      dev->subch_id.cssid = sch->cssid;
29      dev->subch_id.ssid = sch->ssid;
30      dev->subch_id.devid = sch->schid;
31      dev->subch_id.valid = true;
32  }
33  
34  static void ccw_device_realize(CcwDevice *dev, Error **errp)
35  {
36      ccw_device_refill_ids(dev);
37  }
38  
39  static Property ccw_device_properties[] = {
40      DEFINE_PROP_CSS_DEV_ID("devno", CcwDevice, devno),
41      DEFINE_PROP_CSS_DEV_ID_RO("dev_id", CcwDevice, dev_id),
42      DEFINE_PROP_CSS_DEV_ID_RO("subch_id", CcwDevice, subch_id),
43      DEFINE_PROP_END_OF_LIST(),
44  };
45  
46  static void ccw_device_reset(DeviceState *d)
47  {
48      CcwDevice *ccw_dev = CCW_DEVICE(d);
49  
50      css_reset_sch(ccw_dev->sch);
51  }
52  
53  static void ccw_device_class_init(ObjectClass *klass, void *data)
54  {
55      DeviceClass *dc = DEVICE_CLASS(klass);
56      CCWDeviceClass *k = CCW_DEVICE_CLASS(klass);
57  
58      k->realize = ccw_device_realize;
59      k->refill_ids = ccw_device_refill_ids;
60      device_class_set_props(dc, ccw_device_properties);
61      dc->reset = ccw_device_reset;
62  }
63  
64  const VMStateDescription vmstate_ccw_dev = {
65      .name = "s390_ccw_dev",
66      .version_id = 1,
67      .minimum_version_id = 1,
68      .fields = (VMStateField[]) {
69          VMSTATE_STRUCT_POINTER(sch, CcwDevice, vmstate_subch_dev, SubchDev),
70          VMSTATE_END_OF_LIST()
71      }
72  };
73  
74  static const TypeInfo ccw_device_info = {
75      .name = TYPE_CCW_DEVICE,
76      .parent = TYPE_DEVICE,
77      .instance_size = sizeof(CcwDevice),
78      .class_size = sizeof(CCWDeviceClass),
79      .class_init = ccw_device_class_init,
80      .abstract = true,
81  };
82  
83  static void ccw_device_register(void)
84  {
85      type_register_static(&ccw_device_info);
86  }
87  
88  type_init(ccw_device_register)
89