xref: /optee_os/ta/qcom_pas/src/qcom_pas.c (revision abca35a69f9bea0496cf05e025c3c36e6d5ea68b)

// SPDX-License-Identifier: BSD-2-Clause
/*
 * Copyright (c) 2026, Qualcomm Technologies, Inc. and/or its subsidiaries.
 */

#include <pta_qcom_pas.h>
#include <ta_qcom_pas.h>
#include <tee_internal_api.h>
#include <tee_internal_api_extensions.h>
#include <types_ext.h>
#include <utee_defines.h>

static size_t session_refcount;
static TEE_TASessionHandle pta_session;

static TEE_Result qcom_pas_auth_and_reset(uint32_t pt,
					  TEE_Param params[TEE_NUM_PARAMS])
{
	const uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_VALUE_INPUT,
						TEE_PARAM_TYPE_VALUE_INPUT,
						TEE_PARAM_TYPE_MEMREF_INPUT,
						TEE_PARAM_TYPE_NONE);
	if (pt != exp_pt)
		return TEE_ERROR_BAD_PARAMETERS;

	/* Firmware authentication - TODO */

	return TEE_InvokeTACommand(pta_session, TEE_TIMEOUT_INFINITE,
				   PTA_QCOM_PAS_AUTH_AND_RESET,
				   pt, params, NULL);
}

TEE_Result TA_CreateEntryPoint(void)
{
	return TEE_SUCCESS;
}

void TA_DestroyEntryPoint(void)
{
}

TEE_Result TA_OpenSessionEntryPoint(uint32_t pt,
				    TEE_Param params[TEE_NUM_PARAMS],
				    void **sess __unused)
{
	static const TEE_UUID uuid = PTA_QCOM_PAS_UUID;
	TEE_Result res = TEE_ERROR_GENERIC;
	TEE_PropSetHandle h = TEE_HANDLE_NULL;
	TEE_Identity id = { };

	res = TEE_AllocatePropertyEnumerator(&h);
	if (res != TEE_SUCCESS)
		goto error;

	TEE_StartPropertyEnumerator(h, TEE_PROPSET_CURRENT_CLIENT);

	res = TEE_GetPropertyAsIdentity(h, NULL, &id);
	if (res != TEE_SUCCESS)
		goto error;

	if (id.login != TEE_LOGIN_REE_KERNEL) {
		res = TEE_ERROR_ACCESS_DENIED;
		goto error;
	}

	if (!session_refcount) {
		res = TEE_OpenTASession(&uuid, TEE_TIMEOUT_INFINITE, pt, params,
					&pta_session, NULL);
		if (res != TEE_SUCCESS)
			goto error;
	}

	session_refcount++;
	res = TEE_SUCCESS;
error:
	if (h)
		TEE_FreePropertyEnumerator(h);

	return res;
}

void TA_CloseSessionEntryPoint(void *sess __unused)
{
	session_refcount--;

	if (!session_refcount)
		TEE_CloseTASession(pta_session);
}

TEE_Result TA_InvokeCommandEntryPoint(void *sess __unused, uint32_t cmd_id,
				      uint32_t pt,
				      TEE_Param params[TEE_NUM_PARAMS])
{
	switch (cmd_id) {
	case TA_QCOM_PAS_IS_SUPPORTED:
		return TEE_InvokeTACommand(pta_session, TEE_TIMEOUT_INFINITE,
					   PTA_QCOM_PAS_IS_SUPPORTED,
					   pt, params, NULL);
	case TA_QCOM_PAS_CAPABILITIES:
		return TEE_InvokeTACommand(pta_session, TEE_TIMEOUT_INFINITE,
					   PTA_QCOM_PAS_CAPABILITIES,
					   pt, params, NULL);
	case TA_QCOM_PAS_INIT_IMAGE:
		return TEE_InvokeTACommand(pta_session, TEE_TIMEOUT_INFINITE,
					   PTA_QCOM_PAS_INIT_IMAGE,
					   pt, params, NULL);
	case TA_QCOM_PAS_MEM_SETUP:
		return TEE_InvokeTACommand(pta_session, TEE_TIMEOUT_INFINITE,
					   PTA_QCOM_PAS_MEM_SETUP,
					   pt, params, NULL);
	case TA_QCOM_PAS_GET_RESOURCE_TABLE:
		return TEE_InvokeTACommand(pta_session, TEE_TIMEOUT_INFINITE,
					   PTA_QCOM_PAS_GET_RESOURCE_TABLE,
					   pt, params, NULL);
	case TA_QCOM_PAS_AUTH_AND_RESET:
		return qcom_pas_auth_and_reset(pt, params);
	case TA_QCOM_PAS_SET_REMOTE_STATE:
		return TEE_InvokeTACommand(pta_session, TEE_TIMEOUT_INFINITE,
					   PTA_QCOM_PAS_SET_REMOTE_STATE,
					   pt, params, NULL);
	case TA_QCOM_PAS_SHUTDOWN:
		return TEE_InvokeTACommand(pta_session, TEE_TIMEOUT_INFINITE,
					   PTA_QCOM_PAS_SHUTDOWN,
					   pt, params, NULL);
	default:
		return TEE_ERROR_NOT_IMPLEMENTED;
	}
}