[PATCH i-g-t 3/3] tests/gem_tiling_max_stride: Add a test for max fence stride

[ville.syrjala@linux.intel.com]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

gem_tiling_max_stride writes a data pattern to an X-tiled buffer using
the maximum supported stride, reads the data back as linear, and
verifies that the data didn't get scrambled on the way.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 tests/Makefile.am             |   1 +
 tests/gem_tiling_max_stride.c | 118 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 119 insertions(+)
 create mode 100644 tests/gem_tiling_max_stride.c

diff --git a/tests/Makefile.am b/tests/Makefile.am
index f8758cd..e147e4e 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -99,6 +99,7 @@ TESTS_progs = \
 	gem_ctx_bad_exec \
 	gem_ctx_basic \
 	gem_reg_read \
+	gem_tiling_max_stride \
 	$(NOUVEAU_TESTS) \
 	prime_self_import \
 	prime_udl \
diff --git a/tests/gem_tiling_max_stride.c b/tests/gem_tiling_max_stride.c
new file mode 100644
index 0000000..3ba8c10
--- /dev/null
+++ b/tests/gem_tiling_max_stride.c
@@ -0,0 +1,118 @@
+/*
+ * Copyright © 2013 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Ville Syrjälä <ville.syrjala@linux.intel.com>
+ *
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include "drm.h"
+#include "i915_drm.h"
+#include "drmtest.h"
+#include "intel_gpu_tools.h"
+
+/**
+ * Testcase: Check that max fence stride works
+ */
+
+int main(int argc, char *argv[])
+{
+	int fd;
+	uint32_t *ptr;
+	uint32_t *data;
+	uint32_t handle;
+	uint32_t stride;
+	uint32_t size;
+	uint32_t devid;
+	int i = 0, x, y;
+	int tile_width = 512;
+	int tile_height = 8;
+
+	fd = drm_open_any();
+
+	devid = intel_get_drm_devid(fd);
+
+	if (intel_gen(devid) >= 7)
+		stride = 256 * 1024;
+	else if (intel_gen(devid) >= 4)
+		stride = 128 * 1024;
+	else {
+		tile_width = 128;
+		tile_height = 16;
+		stride = 8 * 1024;
+	}
+
+	size = stride * tile_height;
+
+	data = malloc(size);
+	assert(data);
+
+	/* Fill each line with the line number */
+	for (y = 0; y < tile_height; y++) {
+		for (x = 0; x < stride / 4; x++)
+			data[i++] = y;
+	}
+
+	handle = gem_create(fd, size);
+
+	ptr = gem_mmap(fd, handle, size, PROT_READ | PROT_WRITE);
+	assert(ptr);
+
+	gem_set_tiling(fd, handle, I915_TILING_X, stride);
+
+	gem_set_domain(fd, handle, I915_GEM_DOMAIN_GTT, I915_GEM_DOMAIN_GTT);
+
+	memcpy(ptr, data, size);
+
+	memset(data, 0, size);
+
+	gem_set_tiling(fd, handle, I915_TILING_NONE, 0);
+
+	memcpy(data, ptr, size);
+
+	/* Check that each tile contains the expected pattern */
+	for (i = 0; i < size / 4; ) {
+		for (y = 0; y < tile_height; y++) {
+			for (x = 0; x < tile_width / 4; x++) {
+				assert(y == data[i]);
+				i++;
+			}
+		}
+	}
+
+	munmap(ptr, size);
+
+	close(fd);
+
+	return 0;
+}
-- 
1.8.1.5

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