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