zip_inflate.c (7083B)
1/***********************license start************************************ 2 * Copyright (c) 2003-2017 Cavium, Inc. 3 * All rights reserved. 4 * 5 * License: one of 'Cavium License' or 'GNU General Public License Version 2' 6 * 7 * This file is provided under the terms of the Cavium License (see below) 8 * or under the terms of GNU General Public License, Version 2, as 9 * published by the Free Software Foundation. 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THE 42 * ENTIRE RISK ARISING OUT OF USE OR PERFORMANCE OF THE SOFTWARE LIES 43 * WITH YOU. 44 ***********************license end**************************************/ 45 46#include <linux/delay.h> 47#include <linux/sched.h> 48 49#include "common.h" 50#include "zip_inflate.h" 51 52static int prepare_inflate_zcmd(struct zip_operation *zip_ops, 53 struct zip_state *s, union zip_inst_s *zip_cmd) 54{ 55 union zip_zres_s *result_ptr = &s->result; 56 57 memset(zip_cmd, 0, sizeof(s->zip_cmd)); 58 memset(result_ptr, 0, sizeof(s->result)); 59 60 /* IWORD#0 */ 61 62 /* Decompression History Gather list - no gather list */ 63 zip_cmd->s.hg = 0; 64 /* For decompression, CE must be 0x0. */ 65 zip_cmd->s.ce = 0; 66 /* For decompression, SS must be 0x0. */ 67 zip_cmd->s.ss = 0; 68 /* For decompression, SF should always be set. */ 69 zip_cmd->s.sf = 1; 70 71 /* Begin File */ 72 if (zip_ops->begin_file == 0) 73 zip_cmd->s.bf = 0; 74 else 75 zip_cmd->s.bf = 1; 76 77 zip_cmd->s.ef = 1; 78 /* 0: for Deflate decompression, 3: for LZS decompression */ 79 zip_cmd->s.cc = zip_ops->ccode; 80 81 /* IWORD #1*/ 82 83 /* adler checksum */ 84 zip_cmd->s.adlercrc32 = zip_ops->csum; 85 86 /* 87 * HISTORYLENGTH must be 0x0 for any ZIP decompress operation. 88 * History data is added to a decompression operation via IWORD3. 89 */ 90 zip_cmd->s.historylength = 0; 91 zip_cmd->s.ds = 0; 92 93 /* IWORD # 8 and 9 - Output pointer */ 94 zip_cmd->s.out_ptr_addr.s.addr = __pa(zip_ops->output); 95 zip_cmd->s.out_ptr_ctl.s.length = zip_ops->output_len; 96 97 /* Maximum number of output-stream bytes that can be written */ 98 zip_cmd->s.totaloutputlength = zip_ops->output_len; 99 100 zip_dbg("Data Direct Input case "); 101 102 /* IWORD # 6 and 7 - input pointer */ 103 zip_cmd->s.dg = 0; 104 zip_cmd->s.inp_ptr_addr.s.addr = __pa((u8 *)zip_ops->input); 105 zip_cmd->s.inp_ptr_ctl.s.length = zip_ops->input_len; 106 107 /* IWORD # 10 and 11 - Result pointer */ 108 zip_cmd->s.res_ptr_addr.s.addr = __pa(result_ptr); 109 110 /* Clearing completion code */ 111 result_ptr->s.compcode = 0; 112 113 /* Returning 0 for time being.*/ 114 return 0; 115} 116 117/** 118 * zip_inflate - API to offload inflate operation to hardware 119 * @zip_ops: Pointer to zip operation structure 120 * @s: Pointer to the structure representing zip state 121 * @zip_dev: Pointer to zip device structure 122 * 123 * This function prepares the zip inflate command and submits it to the zip 124 * engine for processing. 125 * 126 * Return: 0 if successful or error code 127 */ 128int zip_inflate(struct zip_operation *zip_ops, struct zip_state *s, 129 struct zip_device *zip_dev) 130{ 131 union zip_inst_s *zip_cmd = &s->zip_cmd; 132 union zip_zres_s *result_ptr = &s->result; 133 u32 queue; 134 135 /* Prepare inflate zip command */ 136 prepare_inflate_zcmd(zip_ops, s, zip_cmd); 137 138 atomic64_add(zip_ops->input_len, &zip_dev->stats.decomp_in_bytes); 139 140 /* Load inflate command to zip queue and ring the doorbell */ 141 queue = zip_load_instr(zip_cmd, zip_dev); 142 143 /* Decompression requests submitted stats update */ 144 atomic64_inc(&zip_dev->stats.decomp_req_submit); 145 146 /* Wait for completion or error */ 147 zip_poll_result(result_ptr); 148 149 /* Decompression requests completed stats update */ 150 atomic64_inc(&zip_dev->stats.decomp_req_complete); 151 152 zip_ops->compcode = result_ptr->s.compcode; 153 switch (zip_ops->compcode) { 154 case ZIP_CMD_NOTDONE: 155 zip_dbg("Zip Instruction not yet completed\n"); 156 return ZIP_ERROR; 157 158 case ZIP_CMD_SUCCESS: 159 zip_dbg("Zip Instruction completed successfully\n"); 160 break; 161 162 case ZIP_CMD_DYNAMIC_STOP: 163 zip_dbg(" Dynamic stop Initiated\n"); 164 break; 165 166 default: 167 zip_dbg("Instruction failed. Code = %d\n", zip_ops->compcode); 168 atomic64_inc(&zip_dev->stats.decomp_bad_reqs); 169 zip_update_cmd_bufs(zip_dev, queue); 170 return ZIP_ERROR; 171 } 172 173 zip_update_cmd_bufs(zip_dev, queue); 174 175 if ((zip_ops->ccode == 3) && (zip_ops->flush == 4) && 176 (zip_ops->compcode != ZIP_CMD_DYNAMIC_STOP)) 177 result_ptr->s.ef = 1; 178 179 zip_ops->csum = result_ptr->s.adler32; 180 181 atomic64_add(result_ptr->s.totalbyteswritten, 182 &zip_dev->stats.decomp_out_bytes); 183 184 if (zip_ops->output_len < result_ptr->s.totalbyteswritten) { 185 zip_err("output_len (%d) < total bytes written (%d)\n", 186 zip_ops->output_len, result_ptr->s.totalbyteswritten); 187 zip_ops->output_len = 0; 188 } else { 189 zip_ops->output_len = result_ptr->s.totalbyteswritten; 190 } 191 192 zip_ops->bytes_read = result_ptr->s.totalbytesread; 193 zip_ops->bits_processed = result_ptr->s.totalbitsprocessed; 194 zip_ops->end_file = result_ptr->s.ef; 195 if (zip_ops->end_file) { 196 switch (zip_ops->format) { 197 case RAW_FORMAT: 198 zip_dbg("RAW Format: %d ", zip_ops->format); 199 /* Get checksum from engine */ 200 zip_ops->csum = result_ptr->s.adler32; 201 break; 202 203 case ZLIB_FORMAT: 204 zip_dbg("ZLIB Format: %d ", zip_ops->format); 205 zip_ops->csum = result_ptr->s.adler32; 206 break; 207 208 case GZIP_FORMAT: 209 zip_dbg("GZIP Format: %d ", zip_ops->format); 210 zip_ops->csum = result_ptr->s.crc32; 211 break; 212 213 case LZS_FORMAT: 214 zip_dbg("LZS Format: %d ", zip_ops->format); 215 break; 216 217 default: 218 zip_err("Format error:%d\n", zip_ops->format); 219 } 220 } 221 222 return 0; 223}