| /***********************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**************************************/ | |
| #include <linux/delay.h> | |
| #include <linux/sched.h> | |
| #include "common.h" | |
| #include "zip_inflate.h" | |
| static int prepare_inflate_zcmd(struct zip_operation *zip_ops, | |
| struct zip_state *s, union zip_inst_s *zip_cmd) | |
| { | |
| union zip_zres_s *result_ptr = &s->result; | |
| memset(zip_cmd, 0, sizeof(s->zip_cmd)); | |
| memset(result_ptr, 0, sizeof(s->result)); | |
| /* IWORD#0 */ | |
| /* Decompression History Gather list - no gather list */ | |
| zip_cmd->s.hg = 0; | |
| /* For decompression, CE must be 0x0. */ | |
| zip_cmd->s.ce = 0; | |
| /* For decompression, SS must be 0x0. */ | |
| zip_cmd->s.ss = 0; | |
| /* For decompression, SF should always be set. */ | |
| zip_cmd->s.sf = 1; | |
| /* Begin File */ | |
| if (zip_ops->begin_file == 0) | |
| zip_cmd->s.bf = 0; | |
| else | |
| zip_cmd->s.bf = 1; | |
| zip_cmd->s.ef = 1; | |
| /* 0: for Deflate decompression, 3: for LZS decompression */ | |
| zip_cmd->s.cc = zip_ops->ccode; | |
| /* IWORD #1*/ | |
| /* adler checksum */ | |
| zip_cmd->s.adlercrc32 = zip_ops->csum; | |
| /* | |
| * HISTORYLENGTH must be 0x0 for any ZIP decompress operation. | |
| * History data is added to a decompression operation via IWORD3. | |
| */ | |
| zip_cmd->s.historylength = 0; | |
| zip_cmd->s.ds = 0; | |
| /* IWORD # 8 and 9 - Output pointer */ | |
| zip_cmd->s.out_ptr_addr.s.addr = __pa(zip_ops->output); | |
| zip_cmd->s.out_ptr_ctl.s.length = zip_ops->output_len; | |
| /* Maximum number of output-stream bytes that can be written */ | |
| zip_cmd->s.totaloutputlength = zip_ops->output_len; | |
| zip_dbg("Data Direct Input case "); | |
| /* IWORD # 6 and 7 - input pointer */ | |
| zip_cmd->s.dg = 0; | |
| zip_cmd->s.inp_ptr_addr.s.addr = __pa((u8 *)zip_ops->input); | |
| zip_cmd->s.inp_ptr_ctl.s.length = zip_ops->input_len; | |
| /* IWORD # 10 and 11 - Result pointer */ | |
| zip_cmd->s.res_ptr_addr.s.addr = __pa(result_ptr); | |
| /* Clearing completion code */ | |
| result_ptr->s.compcode = 0; | |
| /* Returning 0 for time being.*/ | |
| return 0; | |
| } | |
| /** | |
| * zip_inflate - API to offload inflate operation to hardware | |
| * @zip_ops: Pointer to zip operation structure | |
| * @s: Pointer to the structure representing zip state | |
| * @zip_dev: Pointer to zip device structure | |
| * | |
| * This function prepares the zip inflate command and submits it to the zip | |
| * engine for processing. | |
| * | |
| * Return: 0 if successful or error code | |
| */ | |
| int zip_inflate(struct zip_operation *zip_ops, struct zip_state *s, | |
| struct zip_device *zip_dev) | |
| { | |
| union zip_inst_s *zip_cmd = &s->zip_cmd; | |
| union zip_zres_s *result_ptr = &s->result; | |
| u32 queue; | |
| /* Prepare inflate zip command */ | |
| prepare_inflate_zcmd(zip_ops, s, zip_cmd); | |
| atomic64_add(zip_ops->input_len, &zip_dev->stats.decomp_in_bytes); | |
| /* Load inflate command to zip queue and ring the doorbell */ | |
| queue = zip_load_instr(zip_cmd, zip_dev); | |
| /* Decompression requests submitted stats update */ | |
| atomic64_inc(&zip_dev->stats.decomp_req_submit); | |
| while (!result_ptr->s.compcode) | |
| continue; | |
| /* Decompression requests completed stats update */ | |
| atomic64_inc(&zip_dev->stats.decomp_req_complete); | |
| zip_ops->compcode = result_ptr->s.compcode; | |
| switch (zip_ops->compcode) { | |
| case ZIP_CMD_NOTDONE: | |
| zip_dbg("Zip Instruction not yet completed\n"); | |
| return ZIP_ERROR; | |
| case ZIP_CMD_SUCCESS: | |
| zip_dbg("Zip Instruction completed successfully\n"); | |
| break; | |
| case ZIP_CMD_DYNAMIC_STOP: | |
| zip_dbg(" Dynamic stop Initiated\n"); | |
| break; | |
| default: | |
| zip_dbg("Instruction failed. Code = %d\n", zip_ops->compcode); | |
| atomic64_inc(&zip_dev->stats.decomp_bad_reqs); | |
| zip_update_cmd_bufs(zip_dev, queue); | |
| return ZIP_ERROR; | |
| } | |
| zip_update_cmd_bufs(zip_dev, queue); | |
| if ((zip_ops->ccode == 3) && (zip_ops->flush == 4) && | |
| (zip_ops->compcode != ZIP_CMD_DYNAMIC_STOP)) | |
| result_ptr->s.ef = 1; | |
| zip_ops->csum = result_ptr->s.adler32; | |
| atomic64_add(result_ptr->s.totalbyteswritten, | |
| &zip_dev->stats.decomp_out_bytes); | |
| if (zip_ops->output_len < result_ptr->s.totalbyteswritten) { | |
| zip_err("output_len (%d) < total bytes written (%d)\n", | |
| zip_ops->output_len, result_ptr->s.totalbyteswritten); | |
| zip_ops->output_len = 0; | |
| } else { | |
| zip_ops->output_len = result_ptr->s.totalbyteswritten; | |
| } | |
| zip_ops->bytes_read = result_ptr->s.totalbytesread; | |
| zip_ops->bits_processed = result_ptr->s.totalbitsprocessed; | |
| zip_ops->end_file = result_ptr->s.ef; | |
| if (zip_ops->end_file) { | |
| switch (zip_ops->format) { | |
| case RAW_FORMAT: | |
| zip_dbg("RAW Format: %d ", zip_ops->format); | |
| /* Get checksum from engine */ | |
| zip_ops->csum = result_ptr->s.adler32; | |
| break; | |
| case ZLIB_FORMAT: | |
| zip_dbg("ZLIB Format: %d ", zip_ops->format); | |
| zip_ops->csum = result_ptr->s.adler32; | |
| break; | |
| case GZIP_FORMAT: | |
| zip_dbg("GZIP Format: %d ", zip_ops->format); | |
| zip_ops->csum = result_ptr->s.crc32; | |
| break; | |
| case LZS_FORMAT: | |
| zip_dbg("LZS Format: %d ", zip_ops->format); | |
| break; | |
| default: | |
| zip_err("Format error:%d\n", zip_ops->format); | |
| } | |
| } | |
| return 0; | |
| } |