lib/zlib_dfltcc/dfltcc.c

0001 // SPDX-License-Identifier: Zlib
0002 /* dfltcc.c - SystemZ DEFLATE CONVERSION CALL support. */
0003
0004 #include <linux/export.h>
0005 #include <linux/module.h>
0006 #include "dfltcc_util.h"
0007 #include "dfltcc.h"
0008
0009 char *oesc_msg(
0010     char *buf,
0011     int oesc
0012 )
0013 {
0014     if (oesc == 0x00)
0015         return NULL; /* Successful completion */
0016     else {
0017 #ifdef STATIC
0018         return NULL; /* Ignore for pre-boot decompressor */
0019 #else
0020         sprintf(buf, "Operation-Ending-Supplemental Code is 0x%.2X", oesc);
0021         return buf;
0022 #endif
0023     }
0024 }
0025
0026 void dfltcc_reset(
0027     z_streamp strm,
0028     uInt size
0029 )
0030 {
0031     struct dfltcc_state *dfltcc_state =
0032         (struct dfltcc_state *)((char *)strm->state + size);
0033     struct dfltcc_qaf_param *param =
0034         (struct dfltcc_qaf_param *)&dfltcc_state->param;
0035
0036     /* Initialize available functions */
0037     if (is_dfltcc_enabled()) {
0038         dfltcc(DFLTCC_QAF, param, NULL, NULL, NULL, NULL, NULL);
0039         memmove(&dfltcc_state->af, param, sizeof(dfltcc_state->af));
0040     } else
0041         memset(&dfltcc_state->af, 0, sizeof(dfltcc_state->af));
0042
0043     /* Initialize parameter block */
0044     memset(&dfltcc_state->param, 0, sizeof(dfltcc_state->param));
0045     dfltcc_state->param.nt = 1;
0046
0047     /* Initialize tuning parameters */
0048     if (zlib_dfltcc_support == ZLIB_DFLTCC_FULL_DEBUG)
0049         dfltcc_state->level_mask = DFLTCC_LEVEL_MASK_DEBUG;
0050     else
0051         dfltcc_state->level_mask = DFLTCC_LEVEL_MASK;
0052     dfltcc_state->block_size = DFLTCC_BLOCK_SIZE;
0053     dfltcc_state->block_threshold = DFLTCC_FIRST_FHT_BLOCK_SIZE;
0054     dfltcc_state->dht_threshold = DFLTCC_DHT_MIN_SAMPLE_SIZE;
0055     dfltcc_state->param.ribm = DFLTCC_RIBM;
0056 }
0057 EXPORT_SYMBOL(dfltcc_reset);
0058
0059 MODULE_LICENSE("GPL");