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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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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>
115 lines
3.8 KiB
C
115 lines
3.8 KiB
C
/***********************license start************************************
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* Copyright (c) 2003-2017 Cavium, Inc.
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* All rights reserved.
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*
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* License: one of 'Cavium License' or 'GNU General Public License Version 2'
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*
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* This file is provided under the terms of the Cavium License (see below)
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* or under the terms of GNU General Public License, Version 2, as
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* published by the Free Software Foundation. When using or redistributing
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* this file, you may do so under either license.
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*
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* Cavium License: Redistribution and use in source and binary forms, with
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* or without modification, are permitted provided that the following
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* conditions are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* * Neither the name of Cavium Inc. nor the names of its contributors may be
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* used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* This Software, including technical data, may be subject to U.S. export
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* control laws, including the U.S. Export Administration Act and its
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* associated regulations, and may be subject to export or import
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* regulations in other countries.
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*
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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* AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS
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* OR WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH
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* RESPECT TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY
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* REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT
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* DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY)
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* WARRANTIES OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A
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* PARTICULAR PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET
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* ENJOYMENT, QUIET POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE
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* ENTIRE RISK ARISING OUT OF USE OR PERFORMANCE OF THE SOFTWARE LIES
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* WITH YOU.
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***********************license end**************************************/
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#include <linux/types.h>
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#include <linux/vmalloc.h>
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#include "common.h"
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/**
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* zip_cmd_qbuf_alloc - Allocates a cmd buffer for ZIP Instruction Queue
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* @zip: Pointer to zip device structure
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* @q: Queue number to allocate bufffer to
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* Return: 0 if successful, -ENOMEM otherwise
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*/
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int zip_cmd_qbuf_alloc(struct zip_device *zip, int q)
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{
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zip->iq[q].sw_head = (u64 *)__get_free_pages((GFP_KERNEL | GFP_DMA),
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get_order(ZIP_CMD_QBUF_SIZE));
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if (!zip->iq[q].sw_head)
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return -ENOMEM;
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memset(zip->iq[q].sw_head, 0, ZIP_CMD_QBUF_SIZE);
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zip_dbg("cmd_qbuf_alloc[%d] Success : %p\n", q, zip->iq[q].sw_head);
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return 0;
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}
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/**
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* zip_cmd_qbuf_free - Frees the cmd Queue buffer
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* @zip: Pointer to zip device structure
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* @q: Queue number to free buffer of
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*/
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void zip_cmd_qbuf_free(struct zip_device *zip, int q)
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{
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zip_dbg("Freeing cmd_qbuf 0x%lx\n", zip->iq[q].sw_tail);
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free_pages((u64)zip->iq[q].sw_tail, get_order(ZIP_CMD_QBUF_SIZE));
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}
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/**
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* zip_data_buf_alloc - Allocates memory for a data bufffer
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* @size: Size of the buffer to allocate
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* Returns: Pointer to the buffer allocated
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*/
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u8 *zip_data_buf_alloc(u64 size)
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{
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u8 *ptr;
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ptr = (u8 *)__get_free_pages((GFP_KERNEL | GFP_DMA),
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get_order(size));
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if (!ptr)
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return NULL;
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memset(ptr, 0, size);
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zip_dbg("Data buffer allocation success\n");
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return ptr;
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}
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/**
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* zip_data_buf_free - Frees the memory of a data buffer
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* @ptr: Pointer to the buffer
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* @size: Buffer size
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*/
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void zip_data_buf_free(u8 *ptr, u64 size)
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{
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zip_dbg("Freeing data buffer 0x%lx\n", ptr);
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free_pages((u64)ptr, get_order(size));
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}
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