xref: /openbmc/qemu/hw/s390x/ccw-device.c (revision 500eb6db)
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 "qemu/module.h"
15 
16 static void ccw_device_refill_ids(CcwDevice *dev)
17 {
18     SubchDev *sch = dev->sch;
19 
20     assert(sch);
21 
22     dev->dev_id.cssid = sch->cssid;
23     dev->dev_id.ssid = sch->ssid;
24     dev->dev_id.devid = sch->devno;
25     dev->dev_id.valid = true;
26 
27     dev->subch_id.cssid = sch->cssid;
28     dev->subch_id.ssid = sch->ssid;
29     dev->subch_id.devid = sch->schid;
30     dev->subch_id.valid = true;
31 }
32 
33 static void ccw_device_realize(CcwDevice *dev, Error **errp)
34 {
35     ccw_device_refill_ids(dev);
36 }
37 
38 static Property ccw_device_properties[] = {
39     DEFINE_PROP_CSS_DEV_ID("devno", CcwDevice, devno),
40     DEFINE_PROP_CSS_DEV_ID_RO("dev_id", CcwDevice, dev_id),
41     DEFINE_PROP_CSS_DEV_ID_RO("subch_id", CcwDevice, subch_id),
42     DEFINE_PROP_END_OF_LIST(),
43 };
44 
45 static void ccw_device_reset(DeviceState *d)
46 {
47     CcwDevice *ccw_dev = CCW_DEVICE(d);
48 
49     css_reset_sch(ccw_dev->sch);
50 }
51 
52 static void ccw_device_class_init(ObjectClass *klass, void *data)
53 {
54     DeviceClass *dc = DEVICE_CLASS(klass);
55     CCWDeviceClass *k = CCW_DEVICE_CLASS(klass);
56 
57     k->realize = ccw_device_realize;
58     k->refill_ids = ccw_device_refill_ids;
59     dc->props = ccw_device_properties;
60     dc->reset = ccw_device_reset;
61 }
62 
63 const VMStateDescription vmstate_ccw_dev = {
64     .name = "s390_ccw_dev",
65     .version_id = 1,
66     .minimum_version_id = 1,
67     .fields = (VMStateField[]) {
68         VMSTATE_STRUCT_POINTER(sch, CcwDevice, vmstate_subch_dev, SubchDev),
69         VMSTATE_END_OF_LIST()
70     }
71 };
72 
73 static const TypeInfo ccw_device_info = {
74     .name = TYPE_CCW_DEVICE,
75     .parent = TYPE_DEVICE,
76     .instance_size = sizeof(CcwDevice),
77     .class_size = sizeof(CCWDeviceClass),
78     .class_init = ccw_device_class_init,
79     .abstract = true,
80 };
81 
82 static void ccw_device_register(void)
83 {
84     type_register_static(&ccw_device_info);
85 }
86 
87 type_init(ccw_device_register)
88