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 #include "ipl.h"
17 #include "qapi/visitor.h"
18 #include "qemu/ctype.h"
19 #include "qapi/error.h"
20
ccw_device_refill_ids(CcwDevice * dev)21 static void ccw_device_refill_ids(CcwDevice *dev)
22 {
23 SubchDev *sch = dev->sch;
24
25 assert(sch);
26
27 dev->dev_id.cssid = sch->cssid;
28 dev->dev_id.ssid = sch->ssid;
29 dev->dev_id.devid = sch->devno;
30 dev->dev_id.valid = true;
31
32 dev->subch_id.cssid = sch->cssid;
33 dev->subch_id.ssid = sch->ssid;
34 dev->subch_id.devid = sch->schid;
35 dev->subch_id.valid = true;
36 }
37
ccw_device_realize(CcwDevice * dev,Error ** errp)38 static bool ccw_device_realize(CcwDevice *dev, Error **errp)
39 {
40 ccw_device_refill_ids(dev);
41 return true;
42 }
43
ccw_device_get_loadparm(Object * obj,Visitor * v,const char * name,void * opaque,Error ** errp)44 static void ccw_device_get_loadparm(Object *obj, Visitor *v,
45 const char *name, void *opaque,
46 Error **errp)
47 {
48 CcwDevice *dev = CCW_DEVICE(obj);
49 char *str = g_strndup((char *) dev->loadparm, sizeof(dev->loadparm));
50
51 visit_type_str(v, name, &str, errp);
52 g_free(str);
53 }
54
ccw_device_set_loadparm(Object * obj,Visitor * v,const char * name,void * opaque,Error ** errp)55 static void ccw_device_set_loadparm(Object *obj, Visitor *v,
56 const char *name, void *opaque,
57 Error **errp)
58 {
59 CcwDevice *dev = CCW_DEVICE(obj);
60 char *val;
61 int index;
62
63 index = object_property_get_int(obj, "bootindex", NULL);
64
65 if (index < 0) {
66 error_setg(errp, "LOADPARM is only valid for boot devices!");
67 }
68
69 if (!visit_type_str(v, name, &val, errp)) {
70 return;
71 }
72
73 s390_ipl_fmt_loadparm(dev->loadparm, val, errp);
74 }
75
76 const PropertyInfo ccw_loadparm = {
77 .name = "ccw_loadparm",
78 .description = "Up to 8 chars in set of [A-Za-z0-9. ] to pass"
79 " to the guest loader/kernel",
80 .get = ccw_device_get_loadparm,
81 .set = ccw_device_set_loadparm,
82 };
83
84 static Property ccw_device_properties[] = {
85 DEFINE_PROP_CSS_DEV_ID("devno", CcwDevice, devno),
86 DEFINE_PROP_CSS_DEV_ID_RO("dev_id", CcwDevice, dev_id),
87 DEFINE_PROP_CSS_DEV_ID_RO("subch_id", CcwDevice, subch_id),
88 DEFINE_PROP_END_OF_LIST(),
89 };
90
ccw_device_reset_hold(Object * obj,ResetType type)91 static void ccw_device_reset_hold(Object *obj, ResetType type)
92 {
93 CcwDevice *ccw_dev = CCW_DEVICE(obj);
94
95 css_reset_sch(ccw_dev->sch);
96 }
97
ccw_device_class_init(ObjectClass * klass,void * data)98 static void ccw_device_class_init(ObjectClass *klass, void *data)
99 {
100 DeviceClass *dc = DEVICE_CLASS(klass);
101 CCWDeviceClass *k = CCW_DEVICE_CLASS(klass);
102 ResettableClass *rc = RESETTABLE_CLASS(klass);
103
104 k->realize = ccw_device_realize;
105 k->refill_ids = ccw_device_refill_ids;
106 device_class_set_props(dc, ccw_device_properties);
107 rc->phases.hold = ccw_device_reset_hold;
108 dc->bus_type = TYPE_VIRTUAL_CSS_BUS;
109 }
110
111 const VMStateDescription vmstate_ccw_dev = {
112 .name = "s390_ccw_dev",
113 .version_id = 1,
114 .minimum_version_id = 1,
115 .fields = (const VMStateField[]) {
116 VMSTATE_STRUCT_POINTER(sch, CcwDevice, vmstate_subch_dev, SubchDev),
117 VMSTATE_END_OF_LIST()
118 }
119 };
120
121 static const TypeInfo ccw_device_info = {
122 .name = TYPE_CCW_DEVICE,
123 .parent = TYPE_DEVICE,
124 .instance_size = sizeof(CcwDevice),
125 .class_size = sizeof(CCWDeviceClass),
126 .class_init = ccw_device_class_init,
127 .abstract = true,
128 };
129
ccw_device_register(void)130 static void ccw_device_register(void)
131 {
132 type_register_static(&ccw_device_info);
133 }
134
135 type_init(ccw_device_register)
136