[igt-dev] [PATCH i-g-t v16 04/15] lib/intel_batchbuffer: dump bb to base64

[Zbigniew Kempczyński]

Code for dumping bb to log as base64 which can be used when
something wrong happened.

Signed-off-by: Zbigniew Kempczyński <zbigniew.kempczynski at intel.com>
Cc: Dominik Grzegorzek <dominik.grzegorzek at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
---
 lib/intel_batchbuffer.c | 41 +++++++++++++++++++++++++++++++++++++++++
 lib/intel_batchbuffer.h |  2 ++
 2 files changed, 43 insertions(+)

diff --git a/lib/intel_batchbuffer.c b/lib/intel_batchbuffer.c
index e3282fcf..87638bb2 100644
--- a/lib/intel_batchbuffer.c
+++ b/lib/intel_batchbuffer.c
@@ -52,6 +52,7 @@
 #include "igt_rand.h"
 #include "i830_reg.h"
 #include "huc_copy.h"
+#include <glib.h>
 
 #include <i915_drm.h>
 
@@ -1468,6 +1469,18 @@ void intel_bb_set_debug(struct intel_bb *ibb, bool debug)
 	ibb->debug = debug;
 }
 
+/**
+ * intel_bb_set_dump_base64:
+ * @ibb: pointer to intel_bb
+ * @dump: true / false
+ *
+ * Do bb dump as base64 string before execbuf call.
+ */
+void intel_bb_set_dump_base64(struct intel_bb *ibb, bool dump)
+{
+	ibb->dump_base64 = dump;
+}
+
 static int __compare_objects(const void *p1, const void *p2)
 {
 	const struct drm_i915_gem_exec_object2 *o1 = p1, *o2 = p2;
@@ -1852,6 +1865,31 @@ static void intel_bb_dump_execbuf(struct intel_bb *ibb,
 	}
 }
 
+#define LINELEN 76
+static void intel_bb_dump_base64(struct intel_bb *ibb)
+{
+	int outsize;
+	gchar *str, *pos;
+
+	igt_info("--- bb ---\n");
+	pos = str = g_base64_encode((const guchar *) ibb->batch, ibb->size);
+	outsize = strlen(str);
+
+	while (pos) {
+		char line[LINELEN + 1];
+		int to_copy = min(LINELEN, outsize);
+
+		memcpy(line, pos, to_copy);
+		line[to_copy] = 0;
+		igt_info("%s\n", line);
+		pos += LINELEN;
+		outsize -= to_copy;
+		if (outsize == 0)
+			break;
+	}
+	free(str);
+}
+
 static void print_node(const void *node, VISIT which, int depth)
 {
 	const struct drm_i915_gem_exec_object2 *object =
@@ -1907,6 +1945,9 @@ int __intel_bb_exec(struct intel_bb *ibb, uint32_t end_offset,
 		execbuf.flags &= ~I915_EXEC_NO_RELOC;
 	execbuf.rsvd2 = 0;
 
+	if (ibb->dump_base64)
+		intel_bb_dump_base64(ibb);
+
 	ret = __gem_execbuf_wr(ibb->i915, &execbuf);
 	if (ret) {
 		intel_bb_dump_execbuf(ibb, &execbuf);
diff --git a/lib/intel_batchbuffer.h b/lib/intel_batchbuffer.h
index cc8c84b6..bfb144b7 100644
--- a/lib/intel_batchbuffer.h
+++ b/lib/intel_batchbuffer.h
@@ -433,6 +433,7 @@ struct intel_bb {
 	int i915;
 	int gen;
 	bool debug;
+	bool dump_base64;
 	bool enforce_relocs;
 	uint32_t devid;
 	uint32_t handle;
@@ -486,6 +487,7 @@ int intel_bb_sync(struct intel_bb *ibb);
 void intel_bb_print(struct intel_bb *ibb);
 void intel_bb_dump(struct intel_bb *ibb, const char *filename);
 void intel_bb_set_debug(struct intel_bb *ibb, bool debug);
+void intel_bb_set_dump_base64(struct intel_bb *ibb, bool dump);
 
 static inline uint64_t
 intel_bb_set_default_object_alignment(struct intel_bb *ibb, uint64_t alignment)
-- 
2.26.0