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
oesc_msg(char * buf,int oesc)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
dfltcc_reset(z_streamp strm,uInt size)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