| 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/core/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 | |
| 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 | |
| 38 | static bool ccw_device_realize(CcwDevice *dev, Error **errp) |
| 39 | { |
| 40 | ccw_device_refill_ids(dev); |
| 41 | return true; |
| 42 | } |
| 43 | |
| 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 | |
| 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 | g_autofree char *val = NULL; |
| 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 | .type = "str", |
| 78 | .description = "Up to 8 chars in set of [A-Za-z0-9. ] to select" |
| 79 | " a guest kernel", |
| 80 | .get = ccw_device_get_loadparm, |
| 81 | .set = ccw_device_set_loadparm, |
| 82 | }; |
| 83 | |
| 84 | static const 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 | }; |
| 89 | |
| 90 | static void ccw_device_reset_hold(Object *obj, ResetType type) |
| 91 | { |
| 92 | CcwDevice *ccw_dev = CCW_DEVICE(obj); |
| 93 | |
| 94 | css_reset_sch(ccw_dev->sch); |
| 95 | } |
| 96 | |
| 97 | static void ccw_device_class_init(ObjectClass *klass, const void *data) |
| 98 | { |
| 99 | DeviceClass *dc = DEVICE_CLASS(klass); |
| 100 | CCWDeviceClass *k = CCW_DEVICE_CLASS(klass); |
| 101 | ResettableClass *rc = RESETTABLE_CLASS(klass); |
| 102 | |
| 103 | k->realize = ccw_device_realize; |
| 104 | k->refill_ids = ccw_device_refill_ids; |
| 105 | device_class_set_props(dc, ccw_device_properties); |
| 106 | rc->phases.hold = ccw_device_reset_hold; |
| 107 | dc->bus_type = TYPE_VIRTUAL_CSS_BUS; |
| 108 | } |
| 109 | |
| 110 | const VMStateDescription vmstate_ccw_dev = { |
| 111 | .name = "s390_ccw_dev", |
| 112 | .version_id = 1, |
| 113 | .minimum_version_id = 1, |
| 114 | .fields = (const VMStateField[]) { |
| 115 | VMSTATE_STRUCT_POINTER(sch, CcwDevice, vmstate_subch_dev, SubchDev), |
| 116 | VMSTATE_END_OF_LIST() |
| 117 | } |
| 118 | }; |
| 119 | |
| 120 | static const TypeInfo ccw_device_info = { |
| 121 | .name = TYPE_CCW_DEVICE, |
| 122 | .parent = TYPE_DEVICE, |
| 123 | .instance_size = sizeof(CcwDevice), |
| 124 | .class_size = sizeof(CCWDeviceClass), |
| 125 | .class_init = ccw_device_class_init, |
| 126 | .abstract = true, |
| 127 | }; |
| 128 | |
| 129 | static void ccw_device_register(void) |
| 130 | { |
| 131 | type_register_static(&ccw_device_info); |
| 132 | } |
| 133 | |
| 134 | type_init(ccw_device_register) |