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// SPDX-License-Identifier: BSD-2-Clause
/*
* Copyright (c) 2014, Linaro Limited
* All rights reserved.
*/
#include <assert.h>
#include <kernel/mutex.h>
#include <kernel/panic.h>
#include <string.h>
#include <tee_api_types.h>
#include <trace.h>
#include <tee/se/reader.h>
#include <tee/se/reader/interface.h>
#include "reader_priv.h"
#include "session_priv.h"
TEE_Result tee_se_reader_check_state(struct tee_se_reader_proxy *proxy)
{
struct tee_se_reader *r;
if (proxy->refcnt == 0)
return TEE_ERROR_BAD_STATE;
r = proxy->reader;
if (r->ops->get_state) {
enum tee_se_reader_state state;
mutex_lock(&proxy->mutex);
state = r->ops->get_state(r);
mutex_unlock(&proxy->mutex);
if (state != READER_STATE_SE_INSERTED)
return TEE_ERROR_COMMUNICATION;
}
return TEE_SUCCESS;
}
TEE_Result tee_se_reader_get_name(struct tee_se_reader_proxy *proxy,
char **reader_name, size_t *reader_name_len)
{
size_t name_len;
assert(proxy && proxy->reader);
name_len = strlen(proxy->reader->name);
*reader_name = proxy->reader->name;
*reader_name_len = name_len;
return TEE_SUCCESS;
}
void tee_se_reader_get_properties(struct tee_se_reader_proxy *proxy,
TEE_SEReaderProperties *prop)
{
assert(proxy && proxy->reader);
*prop = proxy->reader->prop;
}
int tee_se_reader_get_refcnt(struct tee_se_reader_proxy *proxy)
{
assert(proxy && proxy->reader);
return proxy->refcnt;
}
TEE_Result tee_se_reader_attach(struct tee_se_reader_proxy *proxy)
{
TEE_Result ret;
mutex_lock(&proxy->mutex);
if (proxy->refcnt == 0) {
struct tee_se_reader *r = proxy->reader;
if (r->ops->open) {
ret = r->ops->open(r);
if (ret != TEE_SUCCESS) {
mutex_unlock(&proxy->mutex);
return ret;
}
}
}
proxy->refcnt++;
mutex_unlock(&proxy->mutex);
return TEE_SUCCESS;
}
void tee_se_reader_detach(struct tee_se_reader_proxy *proxy)
{
if (proxy->refcnt <= 0)
panic("invalid refcnf");
mutex_lock(&proxy->mutex);
proxy->refcnt--;
if (proxy->refcnt == 0) {
struct tee_se_reader *r = proxy->reader;
if (r->ops->close)
r->ops->close(r);
}
mutex_unlock(&proxy->mutex);
}
TEE_Result tee_se_reader_transmit(struct tee_se_reader_proxy *proxy,
uint8_t *tx_buf, size_t tx_buf_len,
uint8_t *rx_buf, size_t *rx_buf_len)
{
struct tee_se_reader *r;
TEE_Result ret;
assert(proxy && proxy->reader);
ret = tee_se_reader_check_state(proxy);
if (ret != TEE_SUCCESS)
return ret;
mutex_lock(&proxy->mutex);
r = proxy->reader;
assert(r->ops->transmit);
ret = r->ops->transmit(r, tx_buf, tx_buf_len, rx_buf, rx_buf_len);
mutex_unlock(&proxy->mutex);
return ret;
}
void tee_se_reader_lock_basic_channel(struct tee_se_reader_proxy *proxy)
{
assert(proxy);
mutex_lock(&proxy->mutex);
proxy->basic_channel_locked = true;
mutex_unlock(&proxy->mutex);
}
void tee_se_reader_unlock_basic_channel(struct tee_se_reader_proxy *proxy)
{
assert(proxy);
mutex_lock(&proxy->mutex);
proxy->basic_channel_locked = false;
mutex_unlock(&proxy->mutex);
}
bool tee_se_reader_is_basic_channel_locked(struct tee_se_reader_proxy *proxy)
{
assert(proxy);
return proxy->basic_channel_locked;
}
TEE_Result tee_se_reader_get_atr(struct tee_se_reader_proxy *proxy,
uint8_t **atr, size_t *atr_len)
{
TEE_Result ret;
struct tee_se_reader *r;
assert(proxy && atr && atr_len);
ret = tee_se_reader_check_state(proxy);
if (ret != TEE_SUCCESS)
return ret;
mutex_lock(&proxy->mutex);
r = proxy->reader;
assert(r->ops->get_atr);
ret = r->ops->get_atr(r, atr, atr_len);
mutex_unlock(&proxy->mutex);
return ret;
}
TEE_Result tee_se_reader_open_session(struct tee_se_reader_proxy *proxy,
struct tee_se_session **session)
{
TEE_Result ret;
struct tee_se_session *s;
assert(session && !*session);
assert(proxy && proxy->reader);
s = tee_se_session_alloc(proxy);
if (!s)
return TEE_ERROR_OUT_OF_MEMORY;
ret = tee_se_reader_attach(proxy);
if (ret != TEE_SUCCESS)
goto err_free_session;
*session = s;
return TEE_SUCCESS;
err_free_session:
tee_se_session_free(s);
return ret;
}
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