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/*
* Copyright (c) 2014, Linaro Limited
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <tee_api_types.h>
#include <trace.h>
#include <kernel/tee_common_unpg.h>
#include <kernel/mutex.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;
TEE_ASSERT(proxy != NULL && proxy->reader != NULL);
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)
{
TEE_ASSERT(proxy != NULL && proxy->reader != NULL);
*prop = proxy->reader->prop;
}
int tee_se_reader_get_refcnt(struct tee_se_reader_proxy *proxy)
{
TEE_ASSERT(proxy != NULL && proxy->reader != NULL);
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)
{
TEE_ASSERT(proxy->refcnt > 0);
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;
TEE_ASSERT(proxy != NULL && proxy->reader != NULL);
ret = tee_se_reader_check_state(proxy);
if (ret != TEE_SUCCESS)
return ret;
mutex_lock(&proxy->mutex);
r = proxy->reader;
TEE_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)
{
TEE_ASSERT(proxy != NULL);
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)
{
TEE_ASSERT(proxy != NULL);
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)
{
TEE_ASSERT(proxy != NULL);
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;
TEE_ASSERT(proxy != NULL && atr != NULL && atr_len != NULL);
ret = tee_se_reader_check_state(proxy);
if (ret != TEE_SUCCESS)
return ret;
mutex_lock(&proxy->mutex);
r = proxy->reader;
TEE_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;
TEE_ASSERT(session != NULL && *session == NULL);
TEE_ASSERT(proxy != NULL && proxy->reader != NULL);
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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