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