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/** @addtogroup MCD_IMPL_LIB
* @{
* @file
* <!-- Copyright Giesecke & Devrient GmbH 2009 - 2012 -->
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/types.h>
#include <linux/slab.h>
#include "mc_kernel_api.h"
#include "public/mobicore_driver_api.h"
#include "session.h"
/*****************************************************************************/
struct bulk_buffer_descriptor *bulk_buffer_descriptor_create(
void *virt_addr,
uint32_t len,
uint32_t handle,
void *phys_addr_wsm_l2
) {
struct bulk_buffer_descriptor *desc =
kzalloc(sizeof(struct bulk_buffer_descriptor), GFP_KERNEL);
desc->virt_addr = virt_addr;
desc->len = len;
desc->handle = handle;
desc->phys_addr_wsm_l2 = phys_addr_wsm_l2;
return desc;
}
/*****************************************************************************/
struct session *session_create(
uint32_t session_id,
void *instance,
struct connection *connection
) {
struct session *session =
kzalloc(sizeof(struct session), GFP_KERNEL);
session->session_id = session_id;
session->instance = instance;
session->notification_connection = connection;
session->session_info.last_error = SESSION_ERR_NO;
session->session_info.state = SESSION_STATE_INITIAL;
INIT_LIST_HEAD(&(session->bulk_buffer_descriptors));
return session;
}
/*****************************************************************************/
void session_cleanup(
struct session *session
) {
struct bulk_buffer_descriptor *bulk_buf_descr;
struct list_head *pos, *q;
/* Unmap still mapped buffers */
list_for_each_safe(pos, q, &session->bulk_buffer_descriptors) {
bulk_buf_descr =
list_entry(pos, struct bulk_buffer_descriptor, list);
MCDRV_DBG_VERBOSE("Physical Address of L2 Table = 0x%X, "
"handle= %d",
(unsigned int)bulk_buf_descr->phys_addr_wsm_l2,
bulk_buf_descr->handle);
/* ignore any error, as we cannot do anything in this case. */
int ret = mobicore_unmap_vmem(session->instance,
bulk_buf_descr->handle);
if (ret != 0)
MCDRV_DBG_ERROR("mobicore_unmap_vmem failed: %d", ret);
list_del(pos);
kfree(bulk_buf_descr);
}
/* Finally delete notification connection */
connection_cleanup(session->notification_connection);
kfree(session);
}
/*****************************************************************************/
void session_set_error_info(
struct session *session,
int32_t err
) {
session->session_info.last_error = err;
}
/*****************************************************************************/
int32_t session_get_last_err(
struct session *session
) {
return session->session_info.last_error;
}
/*****************************************************************************/
struct bulk_buffer_descriptor *session_add_bulk_buf(
struct session *session,
void *buf,
uint32_t len
) {
struct bulk_buffer_descriptor *bulk_buf_descr = NULL;
struct bulk_buffer_descriptor *tmp;
struct list_head *pos;
/* Search bulk buffer descriptors for existing vAddr
At the moment a virtual address can only be added one time */
list_for_each(pos, &session->bulk_buffer_descriptors) {
tmp = list_entry(pos, struct bulk_buffer_descriptor, list);
if (tmp->virt_addr == buf)
return NULL;
}
do {
/* Prepare the interface structure for memory registration in
Kernel Module */
void *l2_table_phys;
uint32_t handle;
int ret = mobicore_map_vmem(session->instance,
buf,
len,
&handle,
&l2_table_phys);
if (ret != 0) {
MCDRV_DBG_ERROR("mobicore_map_vmem failed, ret=%d",
ret);
break;
}
MCDRV_DBG_VERBOSE("Physical Address of L2 Table = 0x%X, "
"handle=%d",
(unsigned int)l2_table_phys,
handle);
/* Create new descriptor */
bulk_buf_descr = bulk_buffer_descriptor_create(
buf,
len,
handle,
l2_table_phys);
/* Add to vector of descriptors */
list_add_tail(&(bulk_buf_descr->list),
&(session->bulk_buffer_descriptors));
} while (0);
return bulk_buf_descr;
}
/*****************************************************************************/
bool session_remove_bulk_buf(
struct session *session,
void *virt_addr
) {
bool ret = true;
struct bulk_buffer_descriptor *bulk_buf_descr = NULL;
struct bulk_buffer_descriptor *tmp;
struct list_head *pos, *q;
MCDRV_DBG_VERBOSE("Virtual Address = 0x%X", (unsigned int) virt_addr);
/* Search and remove bulk buffer descriptor */
list_for_each_safe(pos, q, &session->bulk_buffer_descriptors) {
tmp = list_entry(pos, struct bulk_buffer_descriptor, list);
if (tmp->virt_addr == virt_addr) {
bulk_buf_descr = tmp;
list_del(pos);
break;
}
}
if (bulk_buf_descr == NULL) {
MCDRV_DBG_ERROR("Virtual Address not found");
ret = false;
} else {
MCDRV_DBG_VERBOSE("WsmL2 phys=0x%X, handle=%d",
(unsigned int)bulk_buf_descr->phys_addr_wsm_l2,
bulk_buf_descr->handle);
/* ignore any error, as we cannot do anything */
int ret = mobicore_unmap_vmem(session->instance,
bulk_buf_descr->handle);
if (ret != 0)
MCDRV_DBG_ERROR("mobicore_unmap_vmem failed: %d", ret);
kfree(bulk_buf_descr);
}
return ret;
}
/** @} */
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