[Piglit] [PATCH v2] opengl/intel/ppgtt: memory alignment test.

[Sergii Romantsov]

Intel ppgtt-model requires memory addresses to be aligned by page size.
Test explores cases with cached memory-buckets and sizes above cached.

v2: copyright updated

CC: Kenneth Graunke <kenneth at whitecape.org>
CC: Lionel G Landwerlin <lionel.g.landwerlin at intel.com>
CC: Chris Wilson <chris at chris-wilson.co.uk>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=106997
Tests: 24839663a402 (intel/ppgtt: memory address alignment)
Tests: a363bb2cd0e2 (i965: Allocate VMA in userspace for full-PPGTT systems.)
Signed-off-by: Sergii Romantsov <sergii.romantsov at globallogic.com>
Tested-by: Mark Janes <mark.a.janes at intel.com>
---
 tests/general/CMakeLists.gl.txt        |   1 +
 tests/general/ppgtt_memory_alignment.c | 129 +++++++++++++++++++++++++++++++++
 tests/opengl.py                        |   1 +
 3 files changed, 131 insertions(+)
 create mode 100644 tests/general/ppgtt_memory_alignment.c

diff --git a/tests/general/CMakeLists.gl.txt b/tests/general/CMakeLists.gl.txt
index 83189fc..7b43f84 100644
--- a/tests/general/CMakeLists.gl.txt
+++ b/tests/general/CMakeLists.gl.txt
@@ -91,6 +91,7 @@ piglit_add_executable (polygon-mode-offset polygon-mode-offset.c)
 piglit_add_executable (polygon-mode-facing polygon-mode-facing.c)
 piglit_add_executable (polygon-mode polygon-mode.c)
 piglit_add_executable (polygon-offset polygon-offset.c)
+piglit_add_executable (ppgtt_memory_alignment ppgtt_memory_alignment.c)
 piglit_add_executable (primitive-restart primitive-restart.c)
 piglit_add_executable (primitive-restart-draw-mode primitive-restart-draw-mode.c)
 piglit_add_executable (provoking-vertex provoking-vertex.c)
diff --git a/tests/general/ppgtt_memory_alignment.c b/tests/general/ppgtt_memory_alignment.c
new file mode 100644
index 0000000..e7668a7
--- /dev/null
+++ b/tests/general/ppgtt_memory_alignment.c
@@ -0,0 +1,129 @@
+/*
+ * Copyright © 2018 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.
+ */
+/*
+ * \file ppgtt_memory_alignment.c
+ *
+ * Test is explores an internal memory alignments, that are
+ * significant for kernel.
+ *
+ * Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=106997
+ * Tests: 24839663a402 (intel/ppgtt: memory address alignment)
+ * Tests: a363bb2cd0e2 (i965: Allocate VMA in userspace for full-PPGTT systems.)
+ *
+ * \author Sergii Romantsov <sergii.romantsov at gmail.com>
+ * Created on: Oct 11, 2018
+ */
+
+#include "piglit-util-gl.h"
+#include "unistd.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+	config.supports_gl_compat_version = 10;
+
+	config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
+	config.requires_displayed_window = true;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+static enum piglit_result g_result = PIGLIT_FAIL;
+static GLuint g_cur_size = 0;
+static GLubyte *g_buffer = NULL;
+
+static void
+free_buffer(void)
+{
+	if (g_buffer)
+	{
+		free(g_buffer);
+		g_buffer = NULL;
+	}
+}
+
+static void
+test_fail_check(void)
+{
+	/* Intel: Function is needed to check fail-status of execution:
+	 * currently if batch-buffer wasn't submitted than Mesa will exit application.
+	 * Otherwise piglit_display has logic to detect fail across call glGetError.
+	 */
+	if (g_result != PIGLIT_PASS)
+	{
+		fprintf(stderr, "Test failed for buffer size: %x \n", g_cur_size);
+		free_buffer();
+		piglit_report_result(g_result);
+	}
+}
+
+enum piglit_result
+piglit_display(void)
+{
+	/* Maximal value of cache-size supported by driver */
+	const GLsizei cache_max_size = 64 * 1024 * 1024;
+	const GLsizei cache_extra_size = cache_max_size * 16;
+	const unsigned int page_size = getpagesize();
+	const GLsizei size_inconsistency = page_size / 4 + 1;
+	GLsizei size = 0;
+	GLuint buf;
+	bool is_error = false;
+
+	if (!g_buffer)
+		g_buffer = calloc(sizeof(GLubyte), cache_extra_size);
+
+	glClearColor(0.5, 0.5, 0.5, 1.0);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	glGenBuffers(1, &buf);
+	glBindBuffer(GL_ARRAY_BUFFER, buf);
+
+	while (size < cache_extra_size)
+	{
+		glBufferData(GL_ARRAY_BUFFER, g_cur_size, g_buffer, GL_STATIC_DRAW);
+		glVertexAttribPointer(0, 3, GL_UNSIGNED_BYTE, GL_FALSE, 0, 0);
+		glEnableVertexAttribArray(0);
+
+		glDrawArrays(GL_TRIANGLES, 0, 1);
+		if (glGetError() != GL_NO_ERROR)
+			is_error = true;
+
+		g_cur_size = size + size_inconsistency;
+		size = size ? size * 2 : page_size;
+
+		glFlush();
+		if (glGetError() != GL_NO_ERROR)
+			is_error = true;
+	}
+
+	glDeleteBuffers(1, &buf);
+
+	free_buffer();
+
+	g_result = is_error ? PIGLIT_FAIL : PIGLIT_PASS;
+	return g_result;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+	atexit(test_fail_check);
+}
diff --git a/tests/opengl.py b/tests/opengl.py
index f7e408c..917c5a1 100644
--- a/tests/opengl.py
+++ b/tests/opengl.py
@@ -669,6 +669,7 @@ with profile.test_list.group_manager(
     g(['polygon-mode-facing'])
     g(['polygon-mode-offset'])
     g(['polygon-offset'])
+    g(['ppgtt_memory_alignment'])
     g(['push-pop-texture-state'])
     g(['quad-invariance'])
     g(['readpix-z'])
-- 
2.7.4