[PATCH i-g-t v4] 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.

The test also checks that some invalid stride values are rejected
properly.

v2: Check invalid strides
v3: Check invalid stride with Y-tiling
    Include a few more invalid stride values
    Fix gen3 X-tile size
v4: A few more invalid strides :)
    Drop the useless memset()

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 tests/Makefile.am             |   1 +
 tests/gem_tiling_max_stride.c | 153 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 154 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..21daab0
--- /dev/null
+++ b/tests/gem_tiling_max_stride.c
@@ -0,0 +1,153 @@
+/*
+ * 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 <limits.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"
+
+static void do_test_invalid_tiling(int fd, uint32_t handle, int tiling, int stride)
+{
+	struct drm_i915_gem_set_tiling st;
+	int ret;
+
+	memset(&st, 0, sizeof(st));
+	do {
+		st.handle = handle;
+		st.tiling_mode = tiling;
+		st.stride = tiling ? stride : 0;
+
+		ret = ioctl(fd, DRM_IOCTL_I915_GEM_SET_TILING, &st);
+	} while (ret == -1 && (errno == EINTR || errno == EAGAIN));
+	assert(ret == -1 && errno == EINVAL);
+}
+
+static void test_invalid_tiling(int fd, uint32_t handle, int stride)
+{
+	do_test_invalid_tiling(fd, handle, I915_TILING_X, stride);
+	do_test_invalid_tiling(fd, handle, I915_TILING_Y, stride);
+}
+
+/**
+ * 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 {
+		if (IS_GEN2(devid)) {
+			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);
+
+	test_invalid_tiling(fd, handle, 0);
+	test_invalid_tiling(fd, handle, 64);
+	test_invalid_tiling(fd, handle, stride - 1);
+	test_invalid_tiling(fd, handle, stride + 1);
+	test_invalid_tiling(fd, handle, stride + 127);
+	test_invalid_tiling(fd, handle, stride + 128);
+	test_invalid_tiling(fd, handle, stride + tile_width - 1);
+	test_invalid_tiling(fd, handle, stride + tile_width);
+	test_invalid_tiling(fd, handle, stride * 2);
+	test_invalid_tiling(fd, handle, INT_MAX);
+	test_invalid_tiling(fd, handle, UINT_MAX);
+
+	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);
+
+	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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