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/* SPDX-License-Identifier: BSD-3-Clause */
/* Copyright(c) 2007-2022 Intel Corporation */
/**
*****************************************************************************
* @file dc_header_footer.c
*
* @ingroup Dc_DataCompression
*
* @description
* Implementation of the Data Compression header and footer operations.
*
*****************************************************************************/
/*
*******************************************************************************
* Include public/global header files
*******************************************************************************
*/
#include "cpa.h"
#include "cpa_dc.h"
#include "icp_adf_init.h"
/*
*******************************************************************************
* Include private header files
*******************************************************************************
*/
#include "dc_header_footer.h"
#include "dc_session.h"
#include "dc_datapath.h"
CpaStatus
cpaDcGenerateHeader(CpaDcSessionHandle pSessionHandle,
CpaFlatBuffer *pDestBuff,
Cpa32U *count)
{
dc_session_desc_t *pSessionDesc = NULL;
LAC_CHECK_NULL_PARAM(pSessionHandle);
LAC_CHECK_NULL_PARAM(pDestBuff);
LAC_CHECK_NULL_PARAM(pDestBuff->pData);
LAC_CHECK_NULL_PARAM(count);
pSessionDesc = DC_SESSION_DESC_FROM_CTX_GET(pSessionHandle);
if (NULL == pSessionDesc) {
QAT_UTILS_LOG("Session handle not as expected\n");
return CPA_STATUS_INVALID_PARAM;
}
if (CPA_DC_DIR_DECOMPRESS == pSessionDesc->sessDirection) {
QAT_UTILS_LOG("Invalid session direction\n");
return CPA_STATUS_INVALID_PARAM;
}
if (CPA_DC_DEFLATE == pSessionDesc->compType) {
/* Adding a Gzip header */
if (CPA_DC_CRC32 == pSessionDesc->checksumType) {
Cpa8U *pDest = pDestBuff->pData;
if (pDestBuff->dataLenInBytes < DC_GZIP_HEADER_SIZE) {
QAT_UTILS_LOG(
"The dataLenInBytes of the dest buffer is too small.\n");
return CPA_STATUS_INVALID_PARAM;
}
pDest[0] = DC_GZIP_ID1; /* ID1 */
pDest[1] = DC_GZIP_ID2; /* ID2 */
pDest[2] =
0x08; /* CM = 8 denotes "deflate" compression */
pDest[3] = 0x00; /* FLG = 0 denotes "No extra fields" */
pDest[4] = 0x00;
pDest[5] = 0x00;
pDest[6] = 0x00;
pDest[7] = 0x00; /* MTIME = 0x00 means time stamp not
available */
/* XFL = 4 - compressor used fastest compression, */
/* XFL = 2 - compressor used maximum compression. */
pDest[8] = 0;
if (CPA_DC_L1 == pSessionDesc->compLevel)
pDest[8] = DC_GZIP_FAST_COMP;
else if (CPA_DC_L4 >= pSessionDesc->compLevel)
pDest[8] = DC_GZIP_MAX_COMP;
pDest[9] =
DC_GZIP_FILESYSTYPE; /* OS = 0 means FAT filesystem
(MS-DOS, OS/2, NT/Win32), 3 - Unix */
/* Set to the number of bytes added to the buffer */
*count = DC_GZIP_HEADER_SIZE;
}
/* Adding a Zlib header */
else if (CPA_DC_ADLER32 == pSessionDesc->checksumType) {
Cpa8U *pDest = pDestBuff->pData;
Cpa16U header = 0, level = 0;
if (pDestBuff->dataLenInBytes < DC_ZLIB_HEADER_SIZE) {
QAT_UTILS_LOG(
"The dataLenInBytes of the dest buffer is too small.\n");
return CPA_STATUS_INVALID_PARAM;
}
/* CMF = CM | CMINFO.
CM = 8 denotes "deflate" compression,
CMINFO = 7 indicates a 32K window size */
/* Depending on the device, at compression levels above
L1, the
window size can be 8 or 16K bytes.
The file will decompress ok if a greater window size
is specified
in the header. */
header =
(DC_ZLIB_CM_DEFLATE +
(DC_32K_WINDOW_SIZE << DC_ZLIB_WINDOWSIZE_OFFSET))
<< LAC_NUM_BITS_IN_BYTE;
switch (pSessionDesc->compLevel) {
case CPA_DC_L1:
level = DC_ZLIB_LEVEL_0;
break;
case CPA_DC_L2:
level = DC_ZLIB_LEVEL_1;
break;
case CPA_DC_L3:
level = DC_ZLIB_LEVEL_2;
break;
default:
level = DC_ZLIB_LEVEL_3;
}
/* Bits 6 - 7: FLEVEL, compression level */
header |= level << DC_ZLIB_FLEVEL_OFFSET;
/* The header has to be a multiple of 31 */
header += DC_ZLIB_HEADER_OFFSET -
(header % DC_ZLIB_HEADER_OFFSET);
pDest[0] = (Cpa8U)(header >> LAC_NUM_BITS_IN_BYTE);
pDest[1] = (Cpa8U)header;
/* Set to the number of bytes added to the buffer */
*count = DC_ZLIB_HEADER_SIZE;
}
/* If deflate but no checksum required */
else {
*count = 0;
}
} else {
/* There is no header for other compressed data */
*count = 0;
}
return CPA_STATUS_SUCCESS;
}
CpaStatus
cpaDcGenerateFooter(CpaDcSessionHandle pSessionHandle,
CpaFlatBuffer *pDestBuff,
CpaDcRqResults *pRes)
{
dc_session_desc_t *pSessionDesc = NULL;
LAC_CHECK_NULL_PARAM(pSessionHandle);
LAC_CHECK_NULL_PARAM(pDestBuff);
LAC_CHECK_NULL_PARAM(pDestBuff->pData);
LAC_CHECK_NULL_PARAM(pRes);
pSessionDesc = DC_SESSION_DESC_FROM_CTX_GET(pSessionHandle);
if (NULL == pSessionDesc) {
QAT_UTILS_LOG("Session handle not as expected\n");
return CPA_STATUS_INVALID_PARAM;
}
if (CPA_DC_DIR_DECOMPRESS == pSessionDesc->sessDirection) {
QAT_UTILS_LOG("Invalid session direction\n");
return CPA_STATUS_INVALID_PARAM;
}
if (CPA_DC_DEFLATE == pSessionDesc->compType) {
if (CPA_DC_CRC32 == pSessionDesc->checksumType) {
Cpa8U *pDest = pDestBuff->pData;
Cpa32U crc32 = pRes->checksum;
Cpa64U totalLenBeforeCompress =
pSessionDesc->cumulativeConsumedBytes;
if (pDestBuff->dataLenInBytes < DC_GZIP_FOOTER_SIZE) {
QAT_UTILS_LOG(
"The dataLenInBytes of the dest buffer is too small.\n");
return CPA_STATUS_INVALID_PARAM;
}
/* Crc32 of the uncompressed data */
pDest[0] = (Cpa8U)crc32;
pDest[1] = (Cpa8U)(crc32 >> LAC_NUM_BITS_IN_BYTE);
pDest[2] = (Cpa8U)(crc32 >> 2 * LAC_NUM_BITS_IN_BYTE);
pDest[3] = (Cpa8U)(crc32 >> 3 * LAC_NUM_BITS_IN_BYTE);
/* Length of the uncompressed data */
pDest[4] = (Cpa8U)totalLenBeforeCompress;
pDest[5] = (Cpa8U)(totalLenBeforeCompress >>
LAC_NUM_BITS_IN_BYTE);
pDest[6] = (Cpa8U)(totalLenBeforeCompress >>
2 * LAC_NUM_BITS_IN_BYTE);
pDest[7] = (Cpa8U)(totalLenBeforeCompress >>
3 * LAC_NUM_BITS_IN_BYTE);
/* Increment produced by the number of bytes added to
* the buffer */
pRes->produced += DC_GZIP_FOOTER_SIZE;
} else if (CPA_DC_ADLER32 == pSessionDesc->checksumType) {
Cpa8U *pDest = pDestBuff->pData;
Cpa32U adler32 = pRes->checksum;
if (pDestBuff->dataLenInBytes < DC_ZLIB_FOOTER_SIZE) {
QAT_UTILS_LOG(
"The dataLenInBytes of the dest buffer is too small.\n");
return CPA_STATUS_INVALID_PARAM;
}
/* Adler32 of the uncompressed data */
pDest[0] = (Cpa8U)(adler32 >> 3 * LAC_NUM_BITS_IN_BYTE);
pDest[1] = (Cpa8U)(adler32 >> 2 * LAC_NUM_BITS_IN_BYTE);
pDest[2] = (Cpa8U)(adler32 >> LAC_NUM_BITS_IN_BYTE);
pDest[3] = (Cpa8U)adler32;
/* Increment produced by the number of bytes added to
* the buffer */
pRes->produced += DC_ZLIB_FOOTER_SIZE;
}
}
return CPA_STATUS_SUCCESS;
}
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