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/** @addtogroup MCD_IMPL_LIB
* @{
* @file
* <!-- Copyright Giesecke & Devrient GmbH 2009 - 2011 -->
*/
#include <linux/types.h>
#include <linux/slab.h>
#include "mcKernelApi.h"
#include "public/MobiCoreDriverApi.h"
#include "session.h"
//------------------------------------------------------------------------------
bulkBufferDescriptor_t* bulkBufferDescriptor_create(
addr_t virtAddr,
uint32_t len,
uint32_t handle,
addr_t physAddrWsmL2
) {
bulkBufferDescriptor_t *desc = kzalloc(sizeof(bulkBufferDescriptor_t),
GFP_KERNEL);
desc->virtAddr = virtAddr;
desc->len = len;
desc->handle = handle;
desc->physAddrWsmL2 = physAddrWsmL2;
return desc;
}
//------------------------------------------------------------------------------
session_t *session_create(
uint32_t sessionId,
void *pInstance,
connection_t *connection
) {
session_t *session = kzalloc(sizeof(session_t), GFP_KERNEL);
session->sessionId = sessionId;
session->pInstance = pInstance;
session->notificationConnection = connection;
session->sessionInfo.lastErr = SESSION_ERR_NO;
session->sessionInfo.state = SESSION_STATE_INITIAL;
INIT_LIST_HEAD(&(session->bulkBufferDescriptors));
return session;
}
//------------------------------------------------------------------------------
void session_cleanup(
session_t *session
) {
bulkBufferDescriptor_t *pBlkBufDescr;
struct list_head *pos, *q;
// Unmap still mapped buffers
list_for_each_safe(pos, q, &session->bulkBufferDescriptors) {
pBlkBufDescr=list_entry(pos, bulkBufferDescriptor_t, list);
MCDRV_DBG_VERBOSE("Physical Address of L2 Table = 0x%X, handle= %d",
(unsigned int)pBlkBufDescr->physAddrWsmL2,
pBlkBufDescr->handle);
// ignore any error, as we cannot do anything in this case.
int ret = mobicore_unmap_vmem(session->pInstance,
pBlkBufDescr->handle);
if (0 != ret)
{
MCDRV_DBG_ERROR("mobicore_unmap_vmem failed: %d",ret);
}
list_del(pos);
kfree(pBlkBufDescr);
}
// Finally delete notification connection
connection_cleanup(session->notificationConnection);
kfree(session);
}
//------------------------------------------------------------------------------
void session_setErrorInfo(
session_t *session,
int32_t err
) {
session->sessionInfo.lastErr = err;
}
//------------------------------------------------------------------------------
int32_t session_getLastErr(
session_t *session
) {
return session->sessionInfo.lastErr;
}
//------------------------------------------------------------------------------
bulkBufferDescriptor_t* session_addBulkBuf(
session_t *session,
addr_t buf,
uint32_t len
) {
bulkBufferDescriptor_t* blkBufDescr = NULL;
bulkBufferDescriptor_t *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->bulkBufferDescriptors) {
tmp=list_entry(pos, bulkBufferDescriptor_t, list);
if (tmp->virtAddr == buf)
{
return NULL;
}
}
do
{
// Prepare the interface structure for memory registration in
// Kernel Module
addr_t pPhysWsmL2;
uint32_t handle;
int ret = mobicore_map_vmem(session->pInstance,
buf,
len,
&handle,
&pPhysWsmL2);
if (0 != ret) {
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)pPhysWsmL2,
handle);
// Create new descriptor
blkBufDescr = bulkBufferDescriptor_create(
buf,
len,
handle,
pPhysWsmL2);
// Add to vector of descriptors
list_add_tail(&(blkBufDescr->list), &(session->bulkBufferDescriptors));
} while (0);
return blkBufDescr;
}
//------------------------------------------------------------------------------
bool session_removeBulkBuf(
session_t *session,
addr_t virtAddr
) {
bool ret = true;
bulkBufferDescriptor_t *pBlkBufDescr = NULL;
bulkBufferDescriptor_t *tmp;
struct list_head *pos, *q;
MCDRV_DBG_VERBOSE("Virtual Address = 0x%X", (unsigned int) virtAddr);
// Search and remove bulk buffer descriptor
list_for_each_safe(pos, q, &session->bulkBufferDescriptors) {
tmp=list_entry(pos, bulkBufferDescriptor_t, list);
if (tmp->virtAddr == virtAddr)
{
pBlkBufDescr = tmp;
list_del(pos);
break;
}
}
if (NULL == pBlkBufDescr)
{
MCDRV_DBG_ERROR("Virtual Address not found");
ret = false;
}
else
{
MCDRV_DBG_VERBOSE("WsmL2 phys=0x%X, handle=%d",
(unsigned int)pBlkBufDescr->physAddrWsmL2, pBlkBufDescr->handle);
// ignore any error, as we cannot do anything
int ret = mobicore_unmap_vmem(session->pInstance,
pBlkBufDescr->handle);
if (0 != ret)
{
MCDRV_DBG_ERROR("mobicore_unmap_vmem failed: %d",ret);
}
kfree(pBlkBufDescr);
}
return ret;
}
/** @} */
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