4fa9c49f4d
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details the full gnu general public license is included in this distribution in the file called copying this program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope [that] it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details the full gnu general public license is included in this distribution in the file called copying extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 57 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141901.515993066@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
71 lines
2.0 KiB
C
71 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2018 Chelsio Communications. All rights reserved.
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*/
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#include <linux/zlib.h>
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#include "cxgb4.h"
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#include "cudbg_if.h"
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#include "cudbg_lib_common.h"
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#include "cudbg_zlib.h"
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static int cudbg_get_compress_hdr(struct cudbg_buffer *pdbg_buff,
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struct cudbg_buffer *pin_buff)
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{
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if (pdbg_buff->offset + sizeof(struct cudbg_compress_hdr) >
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pdbg_buff->size)
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return CUDBG_STATUS_NO_MEM;
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pin_buff->data = (char *)pdbg_buff->data + pdbg_buff->offset;
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pin_buff->offset = 0;
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pin_buff->size = sizeof(struct cudbg_compress_hdr);
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pdbg_buff->offset += sizeof(struct cudbg_compress_hdr);
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return 0;
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}
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int cudbg_compress_buff(struct cudbg_init *pdbg_init,
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struct cudbg_buffer *pin_buff,
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struct cudbg_buffer *pout_buff)
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{
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struct cudbg_buffer temp_buff = { 0 };
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struct z_stream_s compress_stream;
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struct cudbg_compress_hdr *c_hdr;
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int rc;
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/* Write compression header to output buffer before compression */
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rc = cudbg_get_compress_hdr(pout_buff, &temp_buff);
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if (rc)
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return rc;
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c_hdr = (struct cudbg_compress_hdr *)temp_buff.data;
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c_hdr->compress_id = CUDBG_ZLIB_COMPRESS_ID;
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memset(&compress_stream, 0, sizeof(struct z_stream_s));
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compress_stream.workspace = pdbg_init->workspace;
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rc = zlib_deflateInit2(&compress_stream, Z_DEFAULT_COMPRESSION,
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Z_DEFLATED, CUDBG_ZLIB_WIN_BITS,
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CUDBG_ZLIB_MEM_LVL, Z_DEFAULT_STRATEGY);
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if (rc != Z_OK)
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return CUDBG_SYSTEM_ERROR;
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compress_stream.next_in = pin_buff->data;
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compress_stream.avail_in = pin_buff->size;
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compress_stream.next_out = pout_buff->data + pout_buff->offset;
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compress_stream.avail_out = pout_buff->size - pout_buff->offset;
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rc = zlib_deflate(&compress_stream, Z_FINISH);
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if (rc != Z_STREAM_END)
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return CUDBG_SYSTEM_ERROR;
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rc = zlib_deflateEnd(&compress_stream);
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if (rc != Z_OK)
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return CUDBG_SYSTEM_ERROR;
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c_hdr->compress_size = compress_stream.total_out;
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c_hdr->decompress_size = pin_buff->size;
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pout_buff->offset += compress_stream.total_out;
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return 0;
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}
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