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image: Add support for ZSTD decompression

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This patch adds support for ZSTD decompression of FIT images.

Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Cc: Luka Perkov <luka.perkov@sartura.hr>
This commit is contained in:
Robert Marko 2020-04-25 19:37:21 +02:00 committed by Tom Rini
parent e369790843
commit 26073f9ed3
2 changed files with 53 additions and 0 deletions
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52
common/image.c
View File

@ -46,6 +46,7 @@
#include <lzma/LzmaTypes.h>
#include <lzma/LzmaDec.h>
#include <lzma/LzmaTools.h>
#include <linux/zstd.h>
#ifdef CONFIG_CMD_BDI
extern int do_bdinfo(struct cmd_tbl *cmdtp, int flag, int argc,
@ -198,6 +199,7 @@ static const table_entry_t uimage_comp[] = {
{ IH_COMP_LZMA, "lzma", "lzma compressed", },
{ IH_COMP_LZO, "lzo", "lzo compressed", },
{ IH_COMP_LZ4, "lz4", "lz4 compressed", },
{ IH_COMP_ZSTD, "zstd", "zstd compressed", },
{ -1, "", "", },
};
@ -508,6 +510,56 @@ int image_decomp(int comp, ulong load, ulong image_start, int type,
break;
}
#endif /* CONFIG_LZ4 */
#ifdef CONFIG_ZSTD
case IH_COMP_ZSTD: {
size_t size = unc_len;
ZSTD_DStream *dstream;
ZSTD_inBuffer in_buf;
ZSTD_outBuffer out_buf;
void *workspace;
size_t wsize;
wsize = ZSTD_DStreamWorkspaceBound(image_len);
workspace = malloc(wsize);
if (!workspace) {
debug("%s: cannot allocate workspace of size %zu\n", __func__,
wsize);
return -1;
}
dstream = ZSTD_initDStream(image_len, workspace, wsize);
if (!dstream) {
printf("%s: ZSTD_initDStream failed\n", __func__);
return ZSTD_getErrorCode(ret);
}
in_buf.src = image_buf;
in_buf.pos = 0;
in_buf.size = image_len;
out_buf.dst = load_buf;
out_buf.pos = 0;
out_buf.size = size;
while (1) {
size_t ret;
ret = ZSTD_decompressStream(dstream, &out_buf, &in_buf);
if (ZSTD_isError(ret)) {
printf("%s: ZSTD_decompressStream error %d\n", __func__,
ZSTD_getErrorCode(ret));
return ZSTD_getErrorCode(ret);
}
if (in_buf.pos >= image_len || !ret)
break;
}
image_len = out_buf.pos;
break;
}
#endif /* CONFIG_ZSTD */
default:
printf("Unimplemented compression type %d\n", comp);
return -ENOSYS;

1
include/image.h
View File

@ -326,6 +326,7 @@ enum {
IH_COMP_LZMA, /* lzma Compression Used */
IH_COMP_LZO, /* lzo Compression Used */
IH_COMP_LZ4, /* lz4 Compression Used */
IH_COMP_ZSTD, /* zstd Compression Used */
IH_COMP_COUNT,
};