mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-24 01:15:59 +07:00
640035a2dc
Add a driver for the ZIP engine found on Cavium ThunderX SOCs. The ZIP engine supports hardware accelerated compression and decompression. It includes 2 independent ZIP cores and supports: - DEFLATE compression and decompression (RFC 1951) - LZS compression and decompression (RFC 2395 and ANSI X3.241-1994) - ADLER32 and CRC32 checksums for ZLIB (RFC 1950) and GZIP (RFC 1952) The ZIP engine is presented as a PCI device. It supports DMA and scatter-gather. Signed-off-by: Mahipal Challa <Mahipal.Challa@cavium.com> Signed-off-by: Jan Glauber <jglauber@cavium.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
109 lines
3.7 KiB
C
109 lines
3.7 KiB
C
/***********************license start************************************
|
|
* Copyright (c) 2003-2017 Cavium, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* License: one of 'Cavium License' or 'GNU General Public License Version 2'
|
|
*
|
|
* This file is provided under the terms of the Cavium License (see below)
|
|
* or under the terms of GNU General Public License, Version 2, as
|
|
* published by the Free Software Foundation. When using or redistributing
|
|
* this file, you may do so under either license.
|
|
*
|
|
* Cavium License: Redistribution and use in source and binary forms, with
|
|
* or without modification, are permitted provided that the following
|
|
* conditions are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* * 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.
|
|
*
|
|
* * Neither the name of Cavium Inc. nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software without
|
|
* specific prior written permission.
|
|
*
|
|
* This Software, including technical data, may be subject to U.S. export
|
|
* control laws, including the U.S. Export Administration Act and its
|
|
* associated regulations, and may be subject to export or import
|
|
* regulations in other countries.
|
|
*
|
|
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
|
|
* AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS
|
|
* OR WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH
|
|
* RESPECT TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY
|
|
* REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT
|
|
* DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY)
|
|
* WARRANTIES OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A
|
|
* PARTICULAR PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET
|
|
* ENJOYMENT, QUIET POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE
|
|
* ENTIRE RISK ARISING OUT OF USE OR PERFORMANCE OF THE SOFTWARE LIES
|
|
* WITH YOU.
|
|
***********************license end**************************************/
|
|
|
|
#ifndef __ZIP_DEVICE_H__
|
|
#define __ZIP_DEVICE_H__
|
|
|
|
#include <linux/types.h>
|
|
#include "zip_main.h"
|
|
|
|
struct sg_info {
|
|
/*
|
|
* Pointer to the input data when scatter_gather == 0 and
|
|
* pointer to the input gather list buffer when scatter_gather == 1
|
|
*/
|
|
union zip_zptr_s *gather;
|
|
|
|
/*
|
|
* Pointer to the output data when scatter_gather == 0 and
|
|
* pointer to the output scatter list buffer when scatter_gather == 1
|
|
*/
|
|
union zip_zptr_s *scatter;
|
|
|
|
/*
|
|
* Holds size of the output buffer pointed by scatter list
|
|
* when scatter_gather == 1
|
|
*/
|
|
u64 scatter_buf_size;
|
|
|
|
/* for gather data */
|
|
u64 gather_enable;
|
|
|
|
/* for scatter data */
|
|
u64 scatter_enable;
|
|
|
|
/* Number of gather list pointers for gather data */
|
|
u32 gbuf_cnt;
|
|
|
|
/* Number of scatter list pointers for scatter data */
|
|
u32 sbuf_cnt;
|
|
|
|
/* Buffers allocation state */
|
|
u8 alloc_state;
|
|
};
|
|
|
|
/**
|
|
* struct zip_state - Structure representing the required information related
|
|
* to a command
|
|
* @zip_cmd: Pointer to zip instruction structure
|
|
* @result: Pointer to zip result structure
|
|
* @ctx: Context pointer for inflate
|
|
* @history: Decompression history pointer
|
|
* @sginfo: Scatter-gather info structure
|
|
*/
|
|
struct zip_state {
|
|
union zip_inst_s zip_cmd;
|
|
union zip_zres_s result;
|
|
union zip_zptr_s *ctx;
|
|
union zip_zptr_s *history;
|
|
struct sg_info sginfo;
|
|
};
|
|
|
|
#define ZIP_CONTEXT_SIZE 2048
|
|
#define ZIP_INFLATE_HISTORY_SIZE 32768
|
|
#define ZIP_DEFLATE_HISTORY_SIZE 32768
|
|
|
|
#endif
|