hw/s390x/ccw-device.c

   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 bool ccw_device_realize(CcwDevice *dev, Error **errp)
  35 {
  36     ccw_device_refill_ids(dev);
  37     return true;
  38 }
  39
  40 static Property ccw_device_properties[] = {
  41     DEFINE_PROP_CSS_DEV_ID("devno", CcwDevice, devno),
  42     DEFINE_PROP_CSS_DEV_ID_RO("dev_id", CcwDevice, dev_id),
  43     DEFINE_PROP_CSS_DEV_ID_RO("subch_id", CcwDevice, subch_id),
  44     DEFINE_PROP_END_OF_LIST(),
  45 };
  46
  47 static void ccw_device_reset(DeviceState *d)
  48 {
  49     CcwDevice *ccw_dev = CCW_DEVICE(d);
  50
  51     css_reset_sch(ccw_dev->sch);
  52 }
  53
  54 static void ccw_device_class_init(ObjectClass *klass, void *data)
  55 {
  56     DeviceClass *dc = DEVICE_CLASS(klass);
  57     CCWDeviceClass *k = CCW_DEVICE_CLASS(klass);
  58
  59     k->realize = ccw_device_realize;
  60     k->refill_ids = ccw_device_refill_ids;
  61     device_class_set_props(dc, ccw_device_properties);
  62     dc->reset = ccw_device_reset;
  63     dc->bus_type = TYPE_VIRTUAL_CSS_BUS;
  64 }
  65
  66 const VMStateDescription vmstate_ccw_dev = {
  67     .name = "s390_ccw_dev",
  68     .version_id = 1,
  69     .minimum_version_id = 1,
  70     .fields = (const VMStateField[]) {
  71         VMSTATE_STRUCT_POINTER(sch, CcwDevice, vmstate_subch_dev, SubchDev),
  72         VMSTATE_END_OF_LIST()
  73     }
  74 };
  75
  76 static const TypeInfo ccw_device_info = {
  77     .name = TYPE_CCW_DEVICE,
  78     .parent = TYPE_DEVICE,
  79     .instance_size = sizeof(CcwDevice),
  80     .class_size = sizeof(CCWDeviceClass),
  81     .class_init = ccw_device_class_init,
  82     .abstract = true,
  83 };
  84
  85 static void ccw_device_register(void)
  86 {
  87     type_register_static(&ccw_device_info);
  88 }
  89
  90 type_init(ccw_device_register)