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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2023 Beckhoff Automation GmbH & Co. KG
* Author: Corvin Köhne <corvink@FreeBSD.org>
*/
#include <sys/types.h>
#include <assert.h>
#include <err.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <vmmapi.h>
#include "acpi.h"
#include "acpi_device.h"
#include "config.h"
#include "tpm_device.h"
#include "tpm_emul.h"
#include "tpm_intf.h"
#include "tpm_ppi.h"
#define TPM_ACPI_DEVICE_NAME "TPM"
#define TPM_ACPI_HARDWARE_ID "MSFT0101"
SET_DECLARE(tpm_emul_set, struct tpm_emul);
SET_DECLARE(tpm_intf_set, struct tpm_intf);
SET_DECLARE(tpm_ppi_set, struct tpm_ppi);
struct tpm_device {
struct vmctx *vm_ctx;
struct acpi_device *acpi_dev;
struct tpm_emul *emul;
void *emul_sc;
struct tpm_intf *intf;
void *intf_sc;
struct tpm_ppi *ppi;
void *ppi_sc;
};
static int
tpm_build_acpi_table(const struct acpi_device *const dev)
{
const struct tpm_device *const tpm = acpi_device_get_softc(dev);
if (tpm->intf->build_acpi_table == NULL) {
return (0);
}
return (tpm->intf->build_acpi_table(tpm->intf_sc, tpm->vm_ctx));
}
static int
tpm_write_dsdt(const struct acpi_device *const dev)
{
int error;
const struct tpm_device *const tpm = acpi_device_get_softc(dev);
const struct tpm_ppi *const ppi = tpm->ppi;
/*
* packages for returns
*/
dsdt_line("Name(TPM2, Package(2) {0, 0})");
dsdt_line("Name(TPM3, Package(3) {0, 0, 0})");
if (ppi->write_dsdt_regions) {
error = ppi->write_dsdt_regions(tpm->ppi_sc);
if (error) {
warnx("%s: failed to write ppi dsdt regions\n",
__func__);
return (error);
}
}
/*
* Device Specific Method
* Arg0: UUID
* Arg1: Revision ID
* Arg2: Function Index
* Arg3: Arguments
*/
dsdt_line("Method(_DSM, 4, Serialized)");
dsdt_line("{");
dsdt_indent(1);
if (ppi->write_dsdt_dsm) {
error = ppi->write_dsdt_dsm(tpm->ppi_sc);
if (error) {
warnx("%s: failed to write ppi dsdt dsm\n", __func__);
return (error);
}
}
dsdt_unindent(1);
dsdt_line("}");
return (0);
}
static const struct acpi_device_emul tpm_acpi_device_emul = {
.name = TPM_ACPI_DEVICE_NAME,
.hid = TPM_ACPI_HARDWARE_ID,
.build_table = tpm_build_acpi_table,
.write_dsdt = tpm_write_dsdt,
};
void
tpm_device_destroy(struct tpm_device *const dev)
{
if (dev == NULL)
return;
if (dev->ppi != NULL && dev->ppi->deinit != NULL)
dev->ppi->deinit(dev->ppi_sc);
if (dev->intf != NULL && dev->intf->deinit != NULL)
dev->intf->deinit(dev->intf_sc);
if (dev->emul != NULL && dev->emul->deinit != NULL)
dev->emul->deinit(dev->emul_sc);
acpi_device_destroy(dev->acpi_dev);
free(dev);
}
int
tpm_device_create(struct tpm_device **const new_dev, struct vmctx *const vm_ctx,
nvlist_t *const nvl)
{
struct tpm_device *dev = NULL;
struct tpm_emul **ppemul;
struct tpm_intf **ppintf;
struct tpm_ppi **pp_ppi;
const char *value;
int error;
if (new_dev == NULL || vm_ctx == NULL) {
error = EINVAL;
goto err_out;
}
set_config_value_node_if_unset(nvl, "intf", "crb");
set_config_value_node_if_unset(nvl, "ppi", "qemu");
value = get_config_value_node(nvl, "version");
assert(value != NULL);
if (strcmp(value, "2.0")) {
warnx("%s: unsupported tpm version %s", __func__, value);
error = EINVAL;
goto err_out;
}
dev = calloc(1, sizeof(*dev));
if (dev == NULL) {
error = ENOMEM;
goto err_out;
}
dev->vm_ctx = vm_ctx;
error = acpi_device_create(&dev->acpi_dev, dev, dev->vm_ctx,
&tpm_acpi_device_emul);
if (error)
goto err_out;
value = get_config_value_node(nvl, "type");
assert(value != NULL);
SET_FOREACH(ppemul, tpm_emul_set) {
if (strcmp(value, (*ppemul)->name))
continue;
dev->emul = *ppemul;
break;
}
if (dev->emul == NULL) {
warnx("TPM emulation \"%s\" not found", value);
error = EINVAL;
goto err_out;
}
if (dev->emul->init) {
error = dev->emul->init(&dev->emul_sc, nvl);
if (error)
goto err_out;
}
value = get_config_value_node(nvl, "intf");
SET_FOREACH(ppintf, tpm_intf_set) {
if (strcmp(value, (*ppintf)->name)) {
continue;
}
dev->intf = *ppintf;
break;
}
if (dev->intf == NULL) {
warnx("TPM interface \"%s\" not found", value);
error = EINVAL;
goto err_out;
}
if (dev->intf->init) {
error = dev->intf->init(&dev->intf_sc, dev->emul, dev->emul_sc,
dev->acpi_dev);
if (error)
goto err_out;
}
value = get_config_value_node(nvl, "ppi");
SET_FOREACH(pp_ppi, tpm_ppi_set) {
if (strcmp(value, (*pp_ppi)->name)) {
continue;
}
dev->ppi = *pp_ppi;
break;
}
if (dev->ppi == NULL) {
warnx("TPM PPI \"%s\" not found\n", value);
error = EINVAL;
goto err_out;
}
if (dev->ppi->init) {
error = dev->ppi->init(&dev->ppi_sc);
if (error)
goto err_out;
}
*new_dev = dev;
return (0);
err_out:
tpm_device_destroy(dev);
return (error);
}
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