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
  21 S390FLICState *s390_get_flic(void)
  22 {
  23     static S390FLICState *fs;
  24
  25     if (!fs) {
  26         fs = S390_FLIC_COMMON(object_resolve_path(TYPE_KVM_S390_FLIC, NULL));
  27         if (!fs) {
  28             fs = S390_FLIC_COMMON(object_resolve_path(TYPE_QEMU_S390_FLIC,
  29                                                       NULL));
  30         }
  31     }
  32     return fs;
  33 }
  34
  35 void s390_flic_init(void)
  36 {
  37     DeviceState *dev;
  38
  39     dev = s390_flic_kvm_create();
  40     if (!dev) {
  41         dev = qdev_create(NULL, TYPE_QEMU_S390_FLIC);
  42         object_property_add_child(qdev_get_machine(), TYPE_QEMU_S390_FLIC,
  43                                   OBJECT(dev), NULL);
  44     }
  45     qdev_init_nofail(dev);
  46 }
  47
  48 static int qemu_s390_register_io_adapter(S390FLICState *fs, uint32_t id,
  49                                          uint8_t isc, bool swap,
  50                                          bool is_maskable)
  51 {
  52     /* nothing to do */
  53     return 0;
  54 }
  55
  56 static int qemu_s390_io_adapter_map(S390FLICState *fs, uint32_t id,
  57                                     uint64_t map_addr, bool do_map)
  58 {
  59     /* nothing to do */
  60     return 0;
  61 }
  62
  63 static int qemu_s390_add_adapter_routes(S390FLICState *fs,
  64                                         AdapterRoutes *routes)
  65 {
  66     return -ENOSYS;
  67 }
  68
  69 static void qemu_s390_release_adapter_routes(S390FLICState *fs,
  70                                              AdapterRoutes *routes)
  71 {
  72 }
  73
  74 static int qemu_s390_clear_io_flic(S390FLICState *fs, uint16_t subchannel_id,
  75                            uint16_t subchannel_nr)
  76 {
  77     /* Fixme TCG */
  78     return -ENOSYS;
  79 }
  80
  81 static void qemu_s390_flic_class_init(ObjectClass *oc, void *data)
  82 {
  83     S390FLICStateClass *fsc = S390_FLIC_COMMON_CLASS(oc);
  84
  85     fsc->register_io_adapter = qemu_s390_register_io_adapter;
  86     fsc->io_adapter_map = qemu_s390_io_adapter_map;
  87     fsc->add_adapter_routes = qemu_s390_add_adapter_routes;
  88     fsc->release_adapter_routes = qemu_s390_release_adapter_routes;
  89     fsc->clear_io_irq = qemu_s390_clear_io_flic;
  90 }
  91
  92 static Property s390_flic_common_properties[] = {
  93     DEFINE_PROP_UINT32("adapter_routes_max_batch", S390FLICState,
  94                        adapter_routes_max_batch, ADAPTER_ROUTES_MAX_GSI),
  95     DEFINE_PROP_END_OF_LIST(),
  96 };
  97
  98 static void s390_flic_common_realize(DeviceState *dev, Error **errp)
  99 {
 100     uint32_t max_batch = S390_FLIC_COMMON(dev)->adapter_routes_max_batch;
 101
 102     if (max_batch > ADAPTER_ROUTES_MAX_GSI) {
 103         error_setg(errp, "flic adapter_routes_max_batch too big"
 104                    "%d (%d allowed)", max_batch, ADAPTER_ROUTES_MAX_GSI);
 105     }
 106 }
 107
 108 static void s390_flic_class_init(ObjectClass *oc, void *data)
 109 {
 110     DeviceClass *dc = DEVICE_CLASS(oc);
 111
 112     dc->props = s390_flic_common_properties;
 113     dc->realize = s390_flic_common_realize;
 114 }
 115
 116 static const TypeInfo qemu_s390_flic_info = {
 117     .name          = TYPE_QEMU_S390_FLIC,
 118     .parent        = TYPE_S390_FLIC_COMMON,
 119     .instance_size = sizeof(QEMUS390FLICState),
 120     .class_init    = qemu_s390_flic_class_init,
 121 };
 122
 123
 124 static const TypeInfo s390_flic_common_info = {
 125     .name          = TYPE_S390_FLIC_COMMON,
 126     .parent        = TYPE_SYS_BUS_DEVICE,
 127     .instance_size = sizeof(S390FLICState),
 128     .class_init    = s390_flic_class_init,
 129     .class_size    = sizeof(S390FLICStateClass),
 130 };
 131
 132 static void qemu_s390_flic_register_types(void)
 133 {
 134     type_register_static(&s390_flic_common_info);
 135     type_register_static(&qemu_s390_flic_info);
 136 }
 137
 138 type_init(qemu_s390_flic_register_types)