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 "migration/qemu-file.h"
  17 #include "hw/s390x/s390_flic.h"
  18 #include "trace.h"
  19 #include "hw/qdev.h"
  20 #include "qapi/error.h"
  21
  22 S390FLICState *s390_get_flic(void)
  23 {
  24     S390FLICState *fs;
  25
  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, NULL));
  29     }
  30     return fs;
  31 }
  32
  33 void s390_flic_init(void)
  34 {
  35     DeviceState *dev;
  36
  37     dev = s390_flic_kvm_create();
  38     if (!dev) {
  39         dev = qdev_create(NULL, TYPE_QEMU_S390_FLIC);
  40         object_property_add_child(qdev_get_machine(), TYPE_QEMU_S390_FLIC,
  41                                   OBJECT(dev), NULL);
  42     }
  43     qdev_init_nofail(dev);
  44 }
  45
  46 static int qemu_s390_register_io_adapter(S390FLICState *fs, uint32_t id,
  47                                          uint8_t isc, bool swap,
  48                                          bool is_maskable)
  49 {
  50     /* nothing to do */
  51     return 0;
  52 }
  53
  54 static int qemu_s390_io_adapter_map(S390FLICState *fs, uint32_t id,
  55                                     uint64_t map_addr, bool do_map)
  56 {
  57     /* nothing to do */
  58     return 0;
  59 }
  60
  61 static int qemu_s390_add_adapter_routes(S390FLICState *fs,
  62                                         AdapterRoutes *routes)
  63 {
  64     return -ENOSYS;
  65 }
  66
  67 static void qemu_s390_release_adapter_routes(S390FLICState *fs,
  68                                              AdapterRoutes *routes)
  69 {
  70 }
  71
  72 static int qemu_s390_clear_io_flic(S390FLICState *fs, uint16_t subchannel_id,
  73                            uint16_t subchannel_nr)
  74 {
  75     /* Fixme TCG */
  76     return -ENOSYS;
  77 }
  78
  79 static void qemu_s390_flic_class_init(ObjectClass *oc, void *data)
  80 {
  81     S390FLICStateClass *fsc = S390_FLIC_COMMON_CLASS(oc);
  82
  83     fsc->register_io_adapter = qemu_s390_register_io_adapter;
  84     fsc->io_adapter_map = qemu_s390_io_adapter_map;
  85     fsc->add_adapter_routes = qemu_s390_add_adapter_routes;
  86     fsc->release_adapter_routes = qemu_s390_release_adapter_routes;
  87     fsc->clear_io_irq = qemu_s390_clear_io_flic;
  88 }
  89
  90 static Property s390_flic_common_properties[] = {
  91     DEFINE_PROP_UINT32("adapter_routes_max_batch", S390FLICState,
  92                        adapter_routes_max_batch, ADAPTER_ROUTES_MAX_GSI),
  93     DEFINE_PROP_END_OF_LIST(),
  94 };
  95
  96 static void s390_flic_common_realize(DeviceState *dev, Error **errp)
  97 {
  98     uint32_t max_batch = S390_FLIC_COMMON(dev)->adapter_routes_max_batch;
  99
 100     if (max_batch > ADAPTER_ROUTES_MAX_GSI) {
 101         error_setg(errp, "flic adapter_routes_max_batch too big"
 102                    "%d (%d allowed)", max_batch, ADAPTER_ROUTES_MAX_GSI);
 103     }
 104 }
 105
 106 static void s390_flic_class_init(ObjectClass *oc, void *data)
 107 {
 108     DeviceClass *dc = DEVICE_CLASS(oc);
 109
 110     dc->props = s390_flic_common_properties;
 111     dc->realize = s390_flic_common_realize;
 112 }
 113
 114 static const TypeInfo qemu_s390_flic_info = {
 115     .name          = TYPE_QEMU_S390_FLIC,
 116     .parent        = TYPE_S390_FLIC_COMMON,
 117     .instance_size = sizeof(QEMUS390FLICState),
 118     .class_init    = qemu_s390_flic_class_init,
 119 };
 120
 121
 122 static const TypeInfo s390_flic_common_info = {
 123     .name          = TYPE_S390_FLIC_COMMON,
 124     .parent        = TYPE_SYS_BUS_DEVICE,
 125     .instance_size = sizeof(S390FLICState),
 126     .class_init    = s390_flic_class_init,
 127     .class_size    = sizeof(S390FLICStateClass),
 128 };
 129
 130 static void qemu_s390_flic_register_types(void)
 131 {
 132     type_register_static(&s390_flic_common_info);
 133     type_register_static(&qemu_s390_flic_info);
 134 }
 135
 136 type_init(qemu_s390_flic_register_types)