Recent kernels compress the active objects using zlib + ascii85
encoding. This adapts the tool to decompress those inplace.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
tools/Makefile.sources | 1 +
tools/intel_error_decode.c | 93 ++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 94 insertions(+)
diff --git a/tools/Makefile.sources b/tools/Makefile.sources
index 48b89db..94c070c 100644
--- a/tools/Makefile.sources
+++ b/tools/Makefile.sources
@@ -42,6 +42,7 @@ intel_dump_decode_SOURCES = \
intel_error_decode_SOURCES = \
intel_error_decode.c
+intel_error_decode_LDFLAGS = -lz
intel_bios_reader_SOURCES = \
intel_bios_reader.c \
diff --git a/tools/intel_error_decode.c b/tools/intel_error_decode.c
index 14589a3..b443e35 100644
--- a/tools/intel_error_decode.c
+++ b/tools/intel_error_decode.c
@@ -51,6 +51,7 @@
#include <err.h>
#include <assert.h>
#include <intel_bufmgr.h>
+#include <zlib.h>
#include "intel_chipset.h"
#include "intel_io.h"
@@ -334,6 +335,87 @@ static void decode(struct drm_intel_decode *ctx, bool
is_batch,
*count = 0;
}
+static int zlib_inflate(uint32_t **ptr, int len)
+{
+ struct z_stream_s zstream;
+ void *out;
+
+ memset(&zstream, 0, sizeof(zstream));
+
+ zstream.next_in = (unsigned char *)*ptr;
+ zstream.avail_in = 4*len;
+
+ if (inflateInit(&zstream) != Z_OK)
+ return 0;
+
+ out = malloc(128*4096); /* approximate obj size */
+ zstream.next_out = out;
+ zstream.avail_out = 40*len;
+
+ do {
+ switch (inflate(&zstream, Z_SYNC_FLUSH)) {
+ case Z_STREAM_END:
+ goto end;
+ case Z_OK:
+ break;
+ default:
+ inflateEnd(&zstream);
+ return 0;
+ }
+
+ if (zstream.avail_out)
+ break;
+
+ out = realloc(out, 2*zstream.total_out);
+ if (out == NULL) {
+ inflateEnd(&zstream);
+ return 0;
+ }
+
+ zstream.next_out = (unsigned char *)out + zstream.total_out;
+ zstream.avail_out = zstream.total_out;
+ } while (1);
+end:
+ inflateEnd(&zstream);
+ free(*ptr);
+ *ptr = out;
+ return zstream.total_out / 4;
+}
+
+static int ascii85_decode(const char *in, uint32_t **out)
+{
+ int len = 0, size = 1024;
+
+ *out = realloc(*out, sizeof(uint32_t)*size);
+ if (*out == NULL)
+ return 0;
+
+ while (*in != '\n') {
+ uint32_t v = 0;
+
+ if (len == size) {
+ size *= 2;
+ *out = realloc(*out, sizeof(uint32_t)*size);
+ if (*out == NULL)
+ return 0;
+ }
+
+ if (*in == 'z') {
+ in++;
+ } else {
+ v += in[0] - 33; v *= 85;
+ v += in[1] - 33; v *= 85;
+ v += in[2] - 33; v *= 85;
+ v += in[3] - 33; v *= 85;
+ v += in[4] - 33;
+ in += 5;
+ }
+ (*out)[len++] = v;
+ }
+
+ return zlib_inflate(out, len);
+}
+
static void
read_data_file(FILE *file)
{
@@ -387,6 +469,17 @@ read_data_file(FILE *file)
}
}
+ if (line[0] == ':') {
+ count = ascii85_decode(line+1, &data);
+ if (count == 0) {
+ fprintf(stderr, "ASCII85 decode failed.\n");
+ exit(1);
+ }
+ decode(decode_ctx, is_batch, ring_name, gtt_offset,
+ data, &count);
+ continue;
+ }
+
matched = sscanf(line, "%08x : %08x", &offset, &value);
if (matched != 2) {
unsigned int reg;
--
2.1.1
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