1 // SPDX-License-Identifier: Zlib 2 /* dfltcc.c - SystemZ DEFLATE CONVERSION CALL support. */ 3 4 #include <linux/export.h> 5 #include <linux/module.h> 6 #include "dfltcc_util.h" 7 #include "dfltcc.h" 8 9 char *oesc_msg( 10 char *buf, 11 int oesc 12 ) 13 { 14 if (oesc == 0x00) 15 return NULL; /* Successful completion */ 16 else { 17 #ifdef STATIC 18 return NULL; /* Ignore for pre-boot decompressor */ 19 #else 20 sprintf(buf, "Operation-Ending-Supplemental Code is 0x%.2X", oesc); 21 return buf; 22 #endif 23 } 24 } 25 26 void dfltcc_reset( 27 z_streamp strm, 28 uInt size 29 ) 30 { 31 struct dfltcc_state *dfltcc_state = 32 (struct dfltcc_state *)((char *)strm->state + size); 33 struct dfltcc_qaf_param *param = 34 (struct dfltcc_qaf_param *)&dfltcc_state->param; 35 36 /* Initialize available functions */ 37 if (is_dfltcc_enabled()) { 38 dfltcc(DFLTCC_QAF, param, NULL, NULL, NULL, NULL, NULL); 39 memmove(&dfltcc_state->af, param, sizeof(dfltcc_state->af)); 40 } else 41 memset(&dfltcc_state->af, 0, sizeof(dfltcc_state->af)); 42 43 /* Initialize parameter block */ 44 memset(&dfltcc_state->param, 0, sizeof(dfltcc_state->param)); 45 dfltcc_state->param.nt = 1; 46 47 /* Initialize tuning parameters */ 48 if (zlib_dfltcc_support == ZLIB_DFLTCC_FULL_DEBUG) 49 dfltcc_state->level_mask = DFLTCC_LEVEL_MASK_DEBUG; 50 else 51 dfltcc_state->level_mask = DFLTCC_LEVEL_MASK; 52 dfltcc_state->block_size = DFLTCC_BLOCK_SIZE; 53 dfltcc_state->block_threshold = DFLTCC_FIRST_FHT_BLOCK_SIZE; 54 dfltcc_state->dht_threshold = DFLTCC_DHT_MIN_SAMPLE_SIZE; 55 dfltcc_state->param.ribm = DFLTCC_RIBM; 56 } 57 EXPORT_SYMBOL(dfltcc_reset); 58 59 MODULE_LICENSE("GPL"); 60