201 lines
6.5 KiB
C
201 lines
6.5 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/delay.h>
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#include <linux/sched.h>
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#include "common.h"
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#include "zip_deflate.h"
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/* Prepares the deflate zip command */
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static int prepare_zip_command(struct zip_operation *zip_ops,
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struct zip_state *s, union zip_inst_s *zip_cmd)
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{
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union zip_zres_s *result_ptr = &s->result;
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memset(zip_cmd, 0, sizeof(s->zip_cmd));
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memset(result_ptr, 0, sizeof(s->result));
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/* IWORD #0 */
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/* History gather */
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zip_cmd->s.hg = 0;
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/* compression enable = 1 for deflate */
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zip_cmd->s.ce = 1;
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/* sf (sync flush) */
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zip_cmd->s.sf = 1;
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/* ef (end of file) */
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if (zip_ops->flush == ZIP_FLUSH_FINISH) {
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zip_cmd->s.ef = 1;
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zip_cmd->s.sf = 0;
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}
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zip_cmd->s.cc = zip_ops->ccode;
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/* ss (compression speed/storage) */
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zip_cmd->s.ss = zip_ops->speed;
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/* IWORD #1 */
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/* adler checksum */
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zip_cmd->s.adlercrc32 = zip_ops->csum;
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zip_cmd->s.historylength = zip_ops->history_len;
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zip_cmd->s.dg = 0;
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/* IWORD # 6 and 7 - compression input/history pointer */
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zip_cmd->s.inp_ptr_addr.s.addr = __pa(zip_ops->input);
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zip_cmd->s.inp_ptr_ctl.s.length = (zip_ops->input_len +
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zip_ops->history_len);
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zip_cmd->s.ds = 0;
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/* IWORD # 8 and 9 - Output pointer */
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zip_cmd->s.out_ptr_addr.s.addr = __pa(zip_ops->output);
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zip_cmd->s.out_ptr_ctl.s.length = zip_ops->output_len;
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/* maximum number of output-stream bytes that can be written */
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zip_cmd->s.totaloutputlength = zip_ops->output_len;
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/* IWORD # 10 and 11 - Result pointer */
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zip_cmd->s.res_ptr_addr.s.addr = __pa(result_ptr);
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/* Clearing completion code */
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result_ptr->s.compcode = 0;
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return 0;
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}
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/**
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* zip_deflate - API to offload deflate operation to hardware
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* @zip_ops: Pointer to zip operation structure
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* @s: Pointer to the structure representing zip state
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* @zip_dev: Pointer to zip device structure
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*
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* This function prepares the zip deflate command and submits it to the zip
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* engine for processing.
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*
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* Return: 0 if successful or error code
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*/
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int zip_deflate(struct zip_operation *zip_ops, struct zip_state *s,
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struct zip_device *zip_dev)
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{
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union zip_inst_s *zip_cmd = &s->zip_cmd;
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union zip_zres_s *result_ptr = &s->result;
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u32 queue;
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/* Prepares zip command based on the input parameters */
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prepare_zip_command(zip_ops, s, zip_cmd);
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atomic64_add(zip_ops->input_len, &zip_dev->stats.comp_in_bytes);
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/* Loads zip command into command queues and rings door bell */
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queue = zip_load_instr(zip_cmd, zip_dev);
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/* Stats update for compression requests submitted */
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atomic64_inc(&zip_dev->stats.comp_req_submit);
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/* Wait for completion or error */
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zip_poll_result(result_ptr);
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/* Stats update for compression requests completed */
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atomic64_inc(&zip_dev->stats.comp_req_complete);
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zip_ops->compcode = result_ptr->s.compcode;
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switch (zip_ops->compcode) {
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case ZIP_CMD_NOTDONE:
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zip_dbg("Zip instruction not yet completed");
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return ZIP_ERROR;
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case ZIP_CMD_SUCCESS:
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zip_dbg("Zip instruction completed successfully");
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zip_update_cmd_bufs(zip_dev, queue);
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break;
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case ZIP_CMD_DTRUNC:
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zip_dbg("Output Truncate error");
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/* Returning ZIP_ERROR to avoid copy to user */
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return ZIP_ERROR;
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default:
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zip_err("Zip instruction failed. Code:%d", zip_ops->compcode);
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return ZIP_ERROR;
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}
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/* Update the CRC depending on the format */
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switch (zip_ops->format) {
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case RAW_FORMAT:
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zip_dbg("RAW Format: %d ", zip_ops->format);
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/* Get checksum from engine, need to feed it again */
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zip_ops->csum = result_ptr->s.adler32;
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break;
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case ZLIB_FORMAT:
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zip_dbg("ZLIB Format: %d ", zip_ops->format);
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zip_ops->csum = result_ptr->s.adler32;
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break;
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case GZIP_FORMAT:
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zip_dbg("GZIP Format: %d ", zip_ops->format);
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zip_ops->csum = result_ptr->s.crc32;
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break;
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case LZS_FORMAT:
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zip_dbg("LZS Format: %d ", zip_ops->format);
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break;
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default:
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zip_err("Unknown Format:%d\n", zip_ops->format);
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}
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atomic64_add(result_ptr->s.totalbyteswritten,
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&zip_dev->stats.comp_out_bytes);
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/* Update output_len */
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if (zip_ops->output_len < result_ptr->s.totalbyteswritten) {
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/* Dynamic stop && strm->output_len < zipconstants[onfsize] */
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zip_err("output_len (%d) < total bytes written(%d)\n",
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zip_ops->output_len, result_ptr->s.totalbyteswritten);
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zip_ops->output_len = 0;
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} else {
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zip_ops->output_len = result_ptr->s.totalbyteswritten;
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}
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return 0;
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}
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