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/*****************************************************************************
(c) Cambridge Silicon Radio Limited 2010
All rights reserved and confidential information of CSR
Refer to LICENSE.txt included with this source for details
on the license terms.
*****************************************************************************/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/slab.h>
#include "csr_sched.h"
#include "csr_msgconv.h"
#include "csr_macro.h"
static CsrMsgConvEntry *converter;
CsrMsgConvPrimEntry *CsrMsgConvFind(u16 primType)
{
CsrMsgConvPrimEntry *ptr = NULL;
if (converter)
{
ptr = converter->profile_converters;
while (ptr)
{
if (ptr->primType == primType)
{
break;
}
else
{
ptr = ptr->next;
}
}
}
return ptr;
}
static const CsrMsgConvMsgEntry *find_msg_converter(CsrMsgConvPrimEntry *ptr, u16 msgType)
{
const CsrMsgConvMsgEntry *cv = ptr->conv;
if (ptr->lookupFunc)
{
return (const CsrMsgConvMsgEntry *) ptr->lookupFunc((CsrMsgConvMsgEntry *) cv, msgType);
}
while (cv)
{
if (cv->serFunc == NULL)
{
/* We've reached the end of the chain */
cv = NULL;
break;
}
if (cv->msgType == msgType)
{
break;
}
else
{
cv++;
}
}
return cv;
}
static void *deserialize_data(u16 primType,
size_t length,
u8 *data)
{
CsrMsgConvPrimEntry *ptr;
u8 *ret;
ptr = CsrMsgConvFind(primType);
if (ptr)
{
const CsrMsgConvMsgEntry *cv;
u16 msgId = 0;
size_t offset = 0;
CsrUint16Des(&msgId, data, &offset);
cv = find_msg_converter(ptr, msgId);
if (cv)
{
ret = cv->deserFunc(data, length);
}
else
{
ret = NULL;
}
}
else
{
ret = NULL;
}
return ret;
}
static size_t sizeof_message(u16 primType, void *msg)
{
CsrMsgConvPrimEntry *ptr = CsrMsgConvFind(primType);
size_t ret;
if (ptr)
{
const CsrMsgConvMsgEntry *cv;
u16 msgId = *(u16 *) msg;
cv = find_msg_converter(ptr, msgId);
if (cv)
{
ret = cv->sizeofFunc(msg);
}
else
{
ret = 0;
}
}
else
{
ret = 0;
}
return ret;
}
static u8 free_message(u16 primType, u8 *data)
{
CsrMsgConvPrimEntry *ptr;
u8 ret;
ptr = CsrMsgConvFind(primType);
if (ptr)
{
const CsrMsgConvMsgEntry *cv;
u16 msgId = *(u16 *) data;
cv = find_msg_converter(ptr, msgId);
if (cv)
{
cv->freeFunc(data);
ret = TRUE;
}
else
{
ret = FALSE;
}
}
else
{
ret = FALSE;
}
return ret;
}
static u8 *serialize_message(u16 primType,
void *msg,
size_t *length,
u8 *buffer)
{
CsrMsgConvPrimEntry *ptr;
u8 *ret;
ptr = CsrMsgConvFind(primType);
*length = 0;
if (ptr)
{
const CsrMsgConvMsgEntry *cv;
cv = find_msg_converter(ptr, *(u16 *) msg);
if (cv)
{
ret = cv->serFunc(buffer, length, msg);
}
else
{
ret = NULL;
}
}
else
{
ret = NULL;
}
return ret;
}
size_t CsrMsgConvSizeof(u16 primType, void *msg)
{
return sizeof_message(primType, msg);
}
u8 *CsrMsgConvSerialize(u8 *buffer, size_t maxBufferOffset, size_t *offset, u16 primType, void *msg)
{
if (converter)
{
size_t serializedLength;
u8 *bufSerialized;
u8 *bufOffset = &buffer[*offset];
bufSerialized = converter->serialize_message(primType, msg, &serializedLength, bufOffset);
*offset += serializedLength;
return bufSerialized;
}
else
{
return NULL;
}
}
/* Insert profile converter at head of converter list. */
void CsrMsgConvInsert(u16 primType, const CsrMsgConvMsgEntry *ce)
{
CsrMsgConvPrimEntry *pc;
pc = CsrMsgConvFind(primType);
if (pc)
{
/* Already registered. Do nothing */
}
else
{
pc = kmalloc(sizeof(*pc), GFP_KERNEL);
pc->primType = primType;
pc->conv = ce;
pc->lookupFunc = NULL;
pc->next = converter->profile_converters;
converter->profile_converters = pc;
}
}
EXPORT_SYMBOL_GPL(CsrMsgConvInsert);
CsrMsgConvMsgEntry *CsrMsgConvFindEntry(u16 primType, u16 msgType)
{
CsrMsgConvPrimEntry *ptr = CsrMsgConvFind(primType);
if (ptr)
{
return (CsrMsgConvMsgEntry *) find_msg_converter(ptr, msgType);
}
return NULL;
}
EXPORT_SYMBOL_GPL(CsrMsgConvFindEntry);
CsrMsgConvMsgEntry *CsrMsgConvFindEntryByMsg(u16 primType, const void *msg)
{
CsrMsgConvPrimEntry *ptr = CsrMsgConvFind(primType);
if (ptr && msg)
{
u16 msgType = *((u16 *) msg);
return (CsrMsgConvMsgEntry *) find_msg_converter(ptr, msgType);
}
return NULL;
}
void CsrMsgConvCustomLookupRegister(u16 primType, CsrMsgCustomLookupFunc *lookupFunc)
{
CsrMsgConvPrimEntry *ptr = CsrMsgConvFind(primType);
if (ptr)
{
ptr->lookupFunc = lookupFunc;
}
}
EXPORT_SYMBOL_GPL(CsrMsgConvCustomLookupRegister);
CsrMsgConvEntry *CsrMsgConvInit(void)
{
if (!converter)
{
converter = kmalloc(sizeof(CsrMsgConvEntry), GFP_KERNEL);
converter->profile_converters = NULL;
converter->free_message = free_message;
converter->sizeof_message = sizeof_message;
converter->serialize_message = serialize_message;
converter->deserialize_data = deserialize_data;
}
return converter;
}
EXPORT_SYMBOL_GPL(CsrMsgConvInit);
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