[igt-dev] [PATCH i-g-t v17 15/16] tests/gem_render_tiled_blits: dump gen3 surfaces

[Zbigniew Kempczyński]

Experimental to find out what makes reading via gtt incoherent.

Signed-off-by: Zbigniew Kempczyński <zbigniew.kempczynski at intel.com>
---
 tests/i915/gem_render_tiled_blits.c | 79 ++++++++++++++++++++++++++---
 1 file changed, 73 insertions(+), 6 deletions(-)

diff --git a/tests/i915/gem_render_tiled_blits.c b/tests/i915/gem_render_tiled_blits.c
index 0d83a43e..dbf4a336 100644
--- a/tests/i915/gem_render_tiled_blits.c
+++ b/tests/i915/gem_render_tiled_blits.c
@@ -43,6 +43,8 @@
 #include <sys/stat.h>
 #include <sys/time.h>
 #include <sys/mman.h>
+#include <glib.h>
+#include <zlib.h>
 
 #include <drm.h>
 
@@ -59,20 +61,76 @@ static struct intel_buf linear;
 static uint32_t data[WIDTH*HEIGHT];
 static int snoop;
 
+#define DUMPGEN 3
+#define LINELEN 76
+static int dump_base64(const char *name, void *ptr, uint32_t size)
+{
+	int ret;
+	uLongf outsize = size * 3 / 2;
+	Bytef *destbuf = malloc(outsize);
+	gchar *str, *pos;
+
+	ret = compress2(destbuf, &outsize, ptr, size, Z_BEST_COMPRESSION);
+	if (ret != Z_OK) {
+		igt_warn("error compressing, ret: %d\n", ret);
+	} else {
+		igt_info("compressed %u -> %lu\n", size, outsize);
+
+		igt_info("--- %s ---\n", name);
+		pos = str = g_base64_encode(destbuf, outsize);
+		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);
+	}
+
+	free(destbuf);
+
+	return ret;
+}
+
 static void
-check_buf(struct intel_bb *ibb, struct intel_buf *buf, uint32_t val)
+check_buf(struct intel_bb *ibb, struct intel_buf *buf, uint32_t val, bool dump)
 {
 	int i915 = buf_ops_get_fd(linear.bops);
 	uint32_t *ptr;
+	char name[32];
 	int i;
 
 	render_copy(ibb, 0, buf, 0, 0, WIDTH, HEIGHT, &linear, 0, 0);
 	intel_bb_sync(ibb);
 
 	if (snoop) {
+		if (ibb->gen == DUMPGEN && dump) {
+			ptr = gem_mmap__device_coherent(ibb->i915, buf->handle, 0,
+							buf->surface[0].size, PROT_READ);
+			gem_set_domain(i915, buf->handle, I915_GEM_DOMAIN_WC, 0);
+			snprintf(name, sizeof(name) - 1, "wc-tiling-%d",
+				 buf->tiling);
+			dump_base64(name, ptr, buf->surface[0].size);
+			munmap(ptr, linear.surface[0].size);
+		}
+
 		ptr = gem_mmap__cpu_coherent(i915, linear.handle, 0,
 					     linear.surface[0].size, PROT_READ);
 		gem_set_domain(i915, linear.handle, I915_GEM_DOMAIN_CPU, 0);
+
+		if (ibb->gen == DUMPGEN && dump) {
+			snprintf(name, sizeof(name) - 1, "linear-tiling-%d",
+				 buf->tiling);
+			dump_base64(name, ptr, buf->surface[0].size);
+		}
 	} else {
 		gem_read(i915, linear.handle, 0, data, sizeof(data));
 		ptr = data;
@@ -97,6 +155,7 @@ static void run_test (int fd, int count)
 	uint32_t start = 0;
 	int i, j;
 	uint32_t devid;
+	char name[32];
 
 	devid = intel_get_drm_devid(fd);
 
@@ -123,12 +182,14 @@ static void run_test (int fd, int count)
 	start_val = malloc(sizeof(*start_val)*count);
 
 	for (i = 0; i < count; i++) {
-		uint32_t tiling = I915_TILING_X + (random() & 1);
+		uint32_t tiling = I915_TILING_X + (i & 1);
 		uint32_t *ptr;
 
 		intel_buf_init(bops, &bufs[i], WIDTH, HEIGHT, 32, 0,
 			       tiling, I915_COMPRESSION_NONE);
 		start_val[i] = start;
+		igt_debug("buf init: [w: %u, h: %u, tiling: %u, start val: %u]\n",
+			  WIDTH, HEIGHT, tiling, start);
 
 		ptr = gem_mmap__gtt(fd, bufs[i].handle,
 				    bufs[i].surface[0].size, PROT_WRITE);
@@ -137,12 +198,18 @@ static void run_test (int fd, int count)
 		for (j = 0; j < WIDTH*HEIGHT; j++)
 			ptr[j] = start++;
 
+		if (ibb->gen == DUMPGEN && count == 2) {
+			snprintf(name, sizeof(name) - 1, "gtt-%d-tiling-%d",
+				 i, bufs[i].tiling);
+			dump_base64(name, ptr, bufs[i].surface[0].size);
+		}
+
 		munmap(ptr, bufs[i].surface[0].size);
 	}
 
 	igt_info("Verifying initialisation...\n");
 	for (i = 0; i < count; i++)
-		check_buf(ibb, &bufs[i], start_val[i]);
+		check_buf(ibb, &bufs[i], start_val[i], true);
 
 	igt_info("Cyclic blits, forward...\n");
 	for (i = 0; i < count * 4; i++) {
@@ -156,7 +223,7 @@ static void run_test (int fd, int count)
 	intel_bb_sync(ibb);
 
 	for (i = 0; i < count; i++)
-		check_buf(ibb, &bufs[i], start_val[i]);
+		check_buf(ibb, &bufs[i], start_val[i], false);
 
 	igt_info("Cyclic blits, backward...\n");
 	for (i = 0; i < count * 4; i++) {
@@ -169,7 +236,7 @@ static void run_test (int fd, int count)
 	}
 	intel_bb_sync(ibb);
 	for (i = 0; i < count; i++)
-		check_buf(ibb, &bufs[i], start_val[i]);
+		check_buf(ibb, &bufs[i], start_val[i], false);
 
 	igt_info("Random blits...\n");
 	for (i = 0; i < count * 4; i++) {
@@ -186,7 +253,7 @@ static void run_test (int fd, int count)
 	intel_bb_sync(ibb);
 
 	for (i = 0; i < count; i++)
-		check_buf(ibb, &bufs[i], start_val[i]);
+		check_buf(ibb, &bufs[i], start_val[i], false);
 
 	/* release resources */
 	intel_buf_close(bops, &linear);
-- 
2.26.0