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
 9char *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
26void 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}
57EXPORT_SYMBOL(dfltcc_reset);
58
59MODULE_LICENSE("GPL");