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/*
* tpm_tis_isa.c - QEMU's TPM TIS ISA Device
*
* Copyright (C) 2006,2010-2013 IBM Corporation
*
* Authors:
* Stefan Berger <stefanb@us.ibm.com>
* David Safford <safford@us.ibm.com>
*
* Xen 4 support: Andrease Niederl <andreas.niederl@iaik.tugraz.at>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
* Implementation of the TIS interface according to specs found at
* http://www.trustedcomputinggroup.org. This implementation currently
* supports version 1.3, 21 March 2013
* In the developers menu choose the PC Client section then find the TIS
* specification.
*
* TPM TIS for TPM 2 implementation following TCG PC Client Platform
* TPM Profile (PTP) Specification, Family 2.0, Revision 00.43
*/
#include "qemu/osdep.h"
#include "hw/isa/isa.h"
#include "hw/qdev-properties.h"
#include "migration/vmstate.h"
#include "hw/acpi/tpm.h"
#include "tpm_prop.h"
#include "tpm_tis.h"
#include "qom/object.h"
#include "hw/acpi/acpi_aml_interface.h"
struct TPMStateISA {
/*< private >*/
ISADevice parent_obj;
/*< public >*/
TPMState state; /* not a QOM object */
};
OBJECT_DECLARE_SIMPLE_TYPE(TPMStateISA, TPM_TIS_ISA)
static int tpm_tis_pre_save_isa(void *opaque)
{
TPMStateISA *isadev = opaque;
return tpm_tis_pre_save(&isadev->state);
}
static const VMStateDescription vmstate_tpm_tis_isa = {
.name = "tpm-tis",
.version_id = 0,
.pre_save = tpm_tis_pre_save_isa,
.fields = (const VMStateField[]) {
VMSTATE_BUFFER(state.buffer, TPMStateISA),
VMSTATE_UINT16(state.rw_offset, TPMStateISA),
VMSTATE_UINT8(state.active_locty, TPMStateISA),
VMSTATE_UINT8(state.aborting_locty, TPMStateISA),
VMSTATE_UINT8(state.next_locty, TPMStateISA),
VMSTATE_STRUCT_ARRAY(state.loc, TPMStateISA, TPM_TIS_NUM_LOCALITIES, 0,
vmstate_locty, TPMLocality),
VMSTATE_END_OF_LIST()
}
};
static void tpm_tis_isa_request_completed(TPMIf *ti, int ret)
{
TPMStateISA *isadev = TPM_TIS_ISA(ti);
TPMState *s = &isadev->state;
tpm_tis_request_completed(s, ret);
}
static enum TPMVersion tpm_tis_isa_get_tpm_version(TPMIf *ti)
{
TPMStateISA *isadev = TPM_TIS_ISA(ti);
TPMState *s = &isadev->state;
return tpm_tis_get_tpm_version(s);
}
static void tpm_tis_isa_reset(DeviceState *dev)
{
TPMStateISA *isadev = TPM_TIS_ISA(dev);
TPMState *s = &isadev->state;
return tpm_tis_reset(s);
}
static const Property tpm_tis_isa_properties[] = {
DEFINE_PROP_UINT32("irq", TPMStateISA, state.irq_num, TPM_TIS_IRQ),
DEFINE_PROP_TPMBE("tpmdev", TPMStateISA, state.be_driver),
DEFINE_PROP_BOOL("ppi", TPMStateISA, state.ppi_enabled, true),
};
static void tpm_tis_isa_initfn(Object *obj)
{
TPMStateISA *isadev = TPM_TIS_ISA(obj);
TPMState *s = &isadev->state;
memory_region_init_io(&s->mmio, obj, &tpm_tis_memory_ops,
s, "tpm-tis-mmio",
TPM_TIS_NUM_LOCALITIES << TPM_TIS_LOCALITY_SHIFT);
}
static void tpm_tis_isa_realizefn(DeviceState *dev, Error **errp)
{
TPMStateISA *isadev = TPM_TIS_ISA(dev);
TPMState *s = &isadev->state;
if (!tpm_find()) {
error_setg(errp, "at most one TPM device is permitted");
return;
}
if (!s->be_driver) {
error_setg(errp, "'tpmdev' property is required");
return;
}
if (s->irq_num > 15) {
error_setg(errp, "IRQ %d is outside valid range of 0 to 15",
s->irq_num);
return;
}
s->irq = isa_get_irq(ISA_DEVICE(dev), s->irq_num);
memory_region_add_subregion(isa_address_space(ISA_DEVICE(dev)),
TPM_TIS_ADDR_BASE, &s->mmio);
if (s->ppi_enabled) {
tpm_ppi_init(&s->ppi, isa_address_space(ISA_DEVICE(dev)),
TPM_PPI_ADDR_BASE, OBJECT(dev));
}
}
static void build_tpm_tis_isa_aml(AcpiDevAmlIf *adev, Aml *scope)
{
Aml *dev, *crs;
TPMStateISA *isadev = TPM_TIS_ISA(adev);
TPMIf *ti = TPM_IF(isadev);
dev = aml_device("TPM");
if (tpm_tis_isa_get_tpm_version(ti) == TPM_VERSION_2_0) {
aml_append(dev, aml_name_decl("_HID", aml_string("MSFT0101")));
aml_append(dev, aml_name_decl("_STR", aml_string("TPM 2.0 Device")));
} else {
aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0C31")));
}
aml_append(dev, aml_name_decl("_UID", aml_int(1)));
aml_append(dev, aml_name_decl("_STA", aml_int(0xF)));
crs = aml_resource_template();
aml_append(crs, aml_memory32_fixed(TPM_TIS_ADDR_BASE, TPM_TIS_ADDR_SIZE,
AML_READ_WRITE));
/*
* FIXME: TPM_TIS_IRQ=5 conflicts with PNP0C0F irqs,
* fix default TPM_TIS_IRQ value there to use some unused IRQ
*/
/* aml_append(crs, aml_irq_no_flags(isadev->state.irq_num)); */
aml_append(dev, aml_name_decl("_CRS", crs));
tpm_build_ppi_acpi(ti, dev);
aml_append(scope, dev);
}
static void tpm_tis_isa_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
TPMIfClass *tc = TPM_IF_CLASS(klass);
AcpiDevAmlIfClass *adevc = ACPI_DEV_AML_IF_CLASS(klass);
device_class_set_props(dc, tpm_tis_isa_properties);
dc->vmsd = &vmstate_tpm_tis_isa;
tc->model = TPM_MODEL_TPM_TIS;
dc->realize = tpm_tis_isa_realizefn;
device_class_set_legacy_reset(dc, tpm_tis_isa_reset);
tc->request_completed = tpm_tis_isa_request_completed;
tc->get_version = tpm_tis_isa_get_tpm_version;
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
adevc->build_dev_aml = build_tpm_tis_isa_aml;
}
static const TypeInfo tpm_tis_isa_info = {
.name = TYPE_TPM_TIS_ISA,
.parent = TYPE_ISA_DEVICE,
.instance_size = sizeof(TPMStateISA),
.instance_init = tpm_tis_isa_initfn,
.class_init = tpm_tis_isa_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_TPM_IF },
{ TYPE_ACPI_DEV_AML_IF },
{ }
}
};
static void tpm_tis_isa_register(void)
{
type_register_static(&tpm_tis_isa_info);
}
type_init(tpm_tis_isa_register)
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