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/*
* QEMU S390x floating interrupt controller (flic)
*
* Copyright 2014 IBM Corp.
* Author(s): Jens Freimann <jfrei@linux.vnet.ibm.com>
* Cornelia Huck <cornelia.huck@de.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or (at
* your option) any later version. See the COPYING file in the top-level
* directory.
*/
#include "qemu/osdep.h"
#include "qemu/error-report.h"
#include "hw/sysbus.h"
#include "hw/s390x/ioinst.h"
#include "hw/s390x/s390_flic.h"
#include "hw/s390x/css.h"
#include "trace.h"
#include "cpu.h"
#include "hw/qdev.h"
#include "qapi/error.h"
#include "hw/s390x/s390-virtio-ccw.h"
S390FLICState *s390_get_flic(void)
{
static S390FLICState *fs;
if (!fs) {
fs = S390_FLIC_COMMON(object_resolve_path(TYPE_KVM_S390_FLIC, NULL));
if (!fs) {
fs = S390_FLIC_COMMON(object_resolve_path(TYPE_QEMU_S390_FLIC,
NULL));
}
}
return fs;
}
void s390_flic_init(void)
{
DeviceState *dev;
dev = s390_flic_kvm_create();
if (!dev) {
dev = qdev_create(NULL, TYPE_QEMU_S390_FLIC);
object_property_add_child(qdev_get_machine(), TYPE_QEMU_S390_FLIC,
OBJECT(dev), NULL);
}
qdev_init_nofail(dev);
}
static int qemu_s390_register_io_adapter(S390FLICState *fs, uint32_t id,
uint8_t isc, bool swap,
bool is_maskable, uint8_t flags)
{
/* nothing to do */
return 0;
}
static int qemu_s390_io_adapter_map(S390FLICState *fs, uint32_t id,
uint64_t map_addr, bool do_map)
{
/* nothing to do */
return 0;
}
static int qemu_s390_add_adapter_routes(S390FLICState *fs,
AdapterRoutes *routes)
{
return -ENOSYS;
}
static void qemu_s390_release_adapter_routes(S390FLICState *fs,
AdapterRoutes *routes)
{
}
static int qemu_s390_clear_io_flic(S390FLICState *fs, uint16_t subchannel_id,
uint16_t subchannel_nr)
{
/* Fixme TCG */
return -ENOSYS;
}
static int qemu_s390_modify_ais_mode(S390FLICState *fs, uint8_t isc,
uint16_t mode)
{
QEMUS390FLICState *flic = QEMU_S390_FLIC(fs);
switch (mode) {
case SIC_IRQ_MODE_ALL:
flic->simm &= ~AIS_MODE_MASK(isc);
flic->nimm &= ~AIS_MODE_MASK(isc);
break;
case SIC_IRQ_MODE_SINGLE:
flic->simm |= AIS_MODE_MASK(isc);
flic->nimm &= ~AIS_MODE_MASK(isc);
break;
default:
return -EINVAL;
}
return 0;
}
static int qemu_s390_inject_airq(S390FLICState *fs, uint8_t type,
uint8_t isc, uint8_t flags)
{
QEMUS390FLICState *flic = QEMU_S390_FLIC(fs);
bool flag = flags & S390_ADAPTER_SUPPRESSIBLE;
uint32_t io_int_word = (isc << 27) | IO_INT_WORD_AI;
if (flag && (flic->nimm & AIS_MODE_MASK(isc))) {
trace_qemu_s390_airq_suppressed(type, isc);
return 0;
}
s390_io_interrupt(0, 0, 0, io_int_word);
if (flag && (flic->simm & AIS_MODE_MASK(isc))) {
flic->nimm |= AIS_MODE_MASK(isc);
trace_qemu_s390_suppress_airq(isc, "Single-Interruption Mode",
"NO-Interruptions Mode");
}
return 0;
}
static void qemu_s390_flic_reset(DeviceState *dev)
{
QEMUS390FLICState *flic = QEMU_S390_FLIC(dev);
flic->simm = 0;
flic->nimm = 0;
}
static void qemu_s390_flic_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
S390FLICStateClass *fsc = S390_FLIC_COMMON_CLASS(oc);
dc->reset = qemu_s390_flic_reset;
fsc->register_io_adapter = qemu_s390_register_io_adapter;
fsc->io_adapter_map = qemu_s390_io_adapter_map;
fsc->add_adapter_routes = qemu_s390_add_adapter_routes;
fsc->release_adapter_routes = qemu_s390_release_adapter_routes;
fsc->clear_io_irq = qemu_s390_clear_io_flic;
fsc->modify_ais_mode = qemu_s390_modify_ais_mode;
fsc->inject_airq = qemu_s390_inject_airq;
}
static Property s390_flic_common_properties[] = {
DEFINE_PROP_UINT32("adapter_routes_max_batch", S390FLICState,
adapter_routes_max_batch, ADAPTER_ROUTES_MAX_GSI),
DEFINE_PROP_END_OF_LIST(),
};
static void s390_flic_common_realize(DeviceState *dev, Error **errp)
{
S390FLICState *fs = S390_FLIC_COMMON(dev);
uint32_t max_batch = fs->adapter_routes_max_batch;
if (max_batch > ADAPTER_ROUTES_MAX_GSI) {
error_setg(errp, "flic property adapter_routes_max_batch too big"
" (%d > %d)", max_batch, ADAPTER_ROUTES_MAX_GSI);
}
fs->ais_supported = true;
}
static void s390_flic_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
dc->props = s390_flic_common_properties;
dc->realize = s390_flic_common_realize;
}
static const TypeInfo qemu_s390_flic_info = {
.name = TYPE_QEMU_S390_FLIC,
.parent = TYPE_S390_FLIC_COMMON,
.instance_size = sizeof(QEMUS390FLICState),
.class_init = qemu_s390_flic_class_init,
};
static const TypeInfo s390_flic_common_info = {
.name = TYPE_S390_FLIC_COMMON,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(S390FLICState),
.class_init = s390_flic_class_init,
.class_size = sizeof(S390FLICStateClass),
};
static void qemu_s390_flic_register_types(void)
{
type_register_static(&s390_flic_common_info);
type_register_static(&qemu_s390_flic_info);
}
type_init(qemu_s390_flic_register_types)
static bool adapter_info_so_needed(void *opaque)
{
return css_migration_enabled();
}
const VMStateDescription vmstate_adapter_info_so = {
.name = "s390_adapter_info/summary_offset",
.version_id = 1,
.minimum_version_id = 1,
.needed = adapter_info_so_needed,
.fields = (VMStateField[]) {
VMSTATE_UINT32(summary_offset, AdapterInfo),
VMSTATE_END_OF_LIST()
}
};
const VMStateDescription vmstate_adapter_info = {
.name = "s390_adapter_info",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT64(ind_offset, AdapterInfo),
/*
* We do not have to migrate neither the id nor the addresses.
* The id is set by css_register_io_adapter and the addresses
* are set based on the IndAddr objects after those get mapped.
*/
VMSTATE_END_OF_LIST()
},
.subsections = (const VMStateDescription * []) {
&vmstate_adapter_info_so,
NULL
}
};
const VMStateDescription vmstate_adapter_routes = {
.name = "s390_adapter_routes",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_STRUCT(adapter, AdapterRoutes, 1, vmstate_adapter_info,
AdapterInfo),
VMSTATE_END_OF_LIST()
}
};
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