linux-stable/lib/zlib_dfltcc/dfltcc.c
Mikhail Zaslonko 9fec9f8ea5 lib/zlib: Split deflate and inflate states for DFLTCC
Currently deflate and inflate both use a common state struct. There are
several variables in this struct that we don't need for inflate, and
more may be coming in the future. Therefore split them in two separate
structs.
Apart from that, introduce separate headers for dfltcc_deflate and
dfltcc_inflate.

This commit is based on:
  https://github.com/zlib-ng/zlib-ng/commit/c592b1b

Link: https://lkml.kernel.org/r/20230126131428.1222214-7-zaslonko@linux.ibm.com
Signed-off-by: Mikhail Zaslonko <zaslonko@linux.ibm.com>
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-02-02 22:50:09 -08:00

40 lines
1.1 KiB
C

// SPDX-License-Identifier: Zlib
/* dfltcc.c - SystemZ DEFLATE CONVERSION CALL support. */
#include <linux/export.h>
#include <linux/module.h>
#include "dfltcc_util.h"
#include "dfltcc.h"
char *oesc_msg(
char *buf,
int oesc
)
{
if (oesc == 0x00)
return NULL; /* Successful completion */
else {
#ifdef STATIC
return NULL; /* Ignore for pre-boot decompressor */
#else
sprintf(buf, "Operation-Ending-Supplemental Code is 0x%.2X", oesc);
return buf;
#endif
}
}
void dfltcc_reset_state(struct dfltcc_state *dfltcc_state) {
/* Initialize available functions */
if (is_dfltcc_enabled()) {
dfltcc(DFLTCC_QAF, &dfltcc_state->param, NULL, NULL, NULL, NULL, NULL);
memmove(&dfltcc_state->af, &dfltcc_state->param, sizeof(dfltcc_state->af));
} else
memset(&dfltcc_state->af, 0, sizeof(dfltcc_state->af));
/* Initialize parameter block */
memset(&dfltcc_state->param, 0, sizeof(dfltcc_state->param));
dfltcc_state->param.nt = 1;
dfltcc_state->param.ribm = DFLTCC_RIBM;
}
MODULE_LICENSE("GPL");