hw/intc/s390_flic.c

   1 /*
   2  * QEMU S390x floating interrupt controller (flic)
   3  *
   4  * Copyright 2014 IBM Corp.
   5  * Author(s): Jens Freimann <jfrei@linux.vnet.ibm.com>
   6  *            Cornelia Huck <cornelia.huck@de.ibm.com>
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   9  * your option) any later version. See the COPYING file in the top-level
  10  * directory.
  11  */
  12
  13 #include "qemu/osdep.h"
  14 #include "qemu/error-report.h"
  15 #include "hw/sysbus.h"
  16 #include "hw/s390x/s390_flic.h"
  17 #include "trace.h"
  18 #include "hw/qdev.h"
  19 #include "qapi/error.h"
  20 #include "hw/s390x/s390-virtio-ccw.h"
  21
  22 S390FLICState *s390_get_flic(void)
  23 {
  24     static S390FLICState *fs;
  25
  26     if (!fs) {
  27         fs = S390_FLIC_COMMON(object_resolve_path(TYPE_KVM_S390_FLIC, NULL));
  28         if (!fs) {
  29             fs = S390_FLIC_COMMON(object_resolve_path(TYPE_QEMU_S390_FLIC,
  30                                                       NULL));
  31         }
  32     }
  33     return fs;
  34 }
  35
  36 void s390_flic_init(void)
  37 {
  38     DeviceState *dev;
  39
  40     dev = s390_flic_kvm_create();
  41     if (!dev) {
  42         dev = qdev_create(NULL, TYPE_QEMU_S390_FLIC);
  43         object_property_add_child(qdev_get_machine(), TYPE_QEMU_S390_FLIC,
  44                                   OBJECT(dev), NULL);
  45     }
  46     qdev_init_nofail(dev);
  47 }
  48
  49 static int qemu_s390_register_io_adapter(S390FLICState *fs, uint32_t id,
  50                                          uint8_t isc, bool swap,
  51                                          bool is_maskable)
  52 {
  53     /* nothing to do */
  54     return 0;
  55 }
  56
  57 static int qemu_s390_io_adapter_map(S390FLICState *fs, uint32_t id,
  58                                     uint64_t map_addr, bool do_map)
  59 {
  60     /* nothing to do */
  61     return 0;
  62 }
  63
  64 static int qemu_s390_add_adapter_routes(S390FLICState *fs,
  65                                         AdapterRoutes *routes)
  66 {
  67     return -ENOSYS;
  68 }
  69
  70 static void qemu_s390_release_adapter_routes(S390FLICState *fs,
  71                                              AdapterRoutes *routes)
  72 {
  73 }
  74
  75 static int qemu_s390_clear_io_flic(S390FLICState *fs, uint16_t subchannel_id,
  76                            uint16_t subchannel_nr)
  77 {
  78     /* Fixme TCG */
  79     return -ENOSYS;
  80 }
  81
  82 static void qemu_s390_flic_class_init(ObjectClass *oc, void *data)
  83 {
  84     S390FLICStateClass *fsc = S390_FLIC_COMMON_CLASS(oc);
  85
  86     fsc->register_io_adapter = qemu_s390_register_io_adapter;
  87     fsc->io_adapter_map = qemu_s390_io_adapter_map;
  88     fsc->add_adapter_routes = qemu_s390_add_adapter_routes;
  89     fsc->release_adapter_routes = qemu_s390_release_adapter_routes;
  90     fsc->clear_io_irq = qemu_s390_clear_io_flic;
  91 }
  92
  93 static Property s390_flic_common_properties[] = {
  94     DEFINE_PROP_UINT32("adapter_routes_max_batch", S390FLICState,
  95                        adapter_routes_max_batch, ADAPTER_ROUTES_MAX_GSI),
  96     DEFINE_PROP_END_OF_LIST(),
  97 };
  98
  99 static void s390_flic_common_realize(DeviceState *dev, Error **errp)
 100 {
 101     uint32_t max_batch = S390_FLIC_COMMON(dev)->adapter_routes_max_batch;
 102
 103     if (max_batch > ADAPTER_ROUTES_MAX_GSI) {
 104         error_setg(errp, "flic adapter_routes_max_batch too big"
 105                    "%d (%d allowed)", max_batch, ADAPTER_ROUTES_MAX_GSI);
 106     }
 107 }
 108
 109 static void s390_flic_class_init(ObjectClass *oc, void *data)
 110 {
 111     DeviceClass *dc = DEVICE_CLASS(oc);
 112
 113     dc->props = s390_flic_common_properties;
 114     dc->realize = s390_flic_common_realize;
 115 }
 116
 117 static const TypeInfo qemu_s390_flic_info = {
 118     .name          = TYPE_QEMU_S390_FLIC,
 119     .parent        = TYPE_S390_FLIC_COMMON,
 120     .instance_size = sizeof(QEMUS390FLICState),
 121     .class_init    = qemu_s390_flic_class_init,
 122 };
 123
 124
 125 static const TypeInfo s390_flic_common_info = {
 126     .name          = TYPE_S390_FLIC_COMMON,
 127     .parent        = TYPE_SYS_BUS_DEVICE,
 128     .instance_size = sizeof(S390FLICState),
 129     .class_init    = s390_flic_class_init,
 130     .class_size    = sizeof(S390FLICStateClass),
 131 };
 132
 133 static void qemu_s390_flic_register_types(void)
 134 {
 135     type_register_static(&s390_flic_common_info);
 136     type_register_static(&qemu_s390_flic_info);
 137 }
 138
 139 type_init(qemu_s390_flic_register_types)
 140
 141 const VMStateDescription vmstate_adapter_info = {
 142     .name = "s390_adapter_info",
 143     .version_id = 1,
 144     .minimum_version_id = 1,
 145     .fields = (VMStateField[]) {
 146         VMSTATE_UINT64(ind_offset, AdapterInfo),
 147         /*
 148          * We do not have to migrate neither the id nor the addresses.
 149          * The id is set by css_register_io_adapter and the addresses
 150          * are set based on the IndAddr objects after those get mapped.
 151          */
 152         VMSTATE_END_OF_LIST()
 153     },
 154 };
 155
 156 const VMStateDescription vmstate_adapter_routes = {
 157
 158     .name = "s390_adapter_routes",
 159     .version_id = 1,
 160     .minimum_version_id = 1,
 161     .fields = (VMStateField[]) {
 162         VMSTATE_STRUCT(adapter, AdapterRoutes, 1, vmstate_adapter_info,
 163                        AdapterInfo),
 164         VMSTATE_END_OF_LIST()
 165     }
 166 };