EGL_EXT_image_dma_buf_import/refcount: New test for GEM handle bug.dmabuf-refcount

Drivers can miss the need to refcount their GEM handles, and the
destroy of the image/texture pair for tex2 will result in tex1 no
longer being usable.

This fails to piglit_report_result(PIGLIT_FAIL) on vc4 (which is
missing the handle code), because tex1's shadow tiled temporary
already has the texture contents in it when the shadow linear->tiled
blit fails, but the driver does make a noisy warning on stderr.  On
intel, if you drop the global name lookup in libdrm, the driver
exit()s due to the -EINVAL from the draw call.

4 files changed, 139 insertions, 4 deletions

diff --git a/tests/spec/ext_image_dma_buf_import/CMakeLists.gles2.txt b/tests/spec/ext_image_dma_buf_import/CMakeLists.gles2.txt
index fdf43595a..93f43fad9 100644
--- a/tests/spec/ext_image_dma_buf_import/CMakeLists.gles2.txt
+++ b/tests/spec/ext_image_dma_buf_import/CMakeLists.gles2.txt
@@ -16,6 +16,7 @@ if(PIGLIT_BUILD_DMA_BUF_TESTS)
 		${LIBDRM_INCLUDE_DIRS}
 	)
 
+	piglit_add_executable(ext_image_dma_buf_import-refcount refcount.c sample_common.c image_common.c)
 	piglit_add_executable(ext_image_dma_buf_import-sample_yuv sample_yuv.c sample_common.c image_common.c)
 	piglit_add_executable(ext_image_dma_buf_import-sample_rgb sample_rgb.c sample_common.c image_common.c)
 	piglit_add_executable(ext_image_dma_buf_import-intel_external_sampler_with_dma_only intel_external_sampler_with_dma_only.c image_common.c)
diff --git a/tests/spec/ext_image_dma_buf_import/refcount.c b/tests/spec/ext_image_dma_buf_import/refcount.c
new file mode 100644
index 000000000..5b14cdd76
--- /dev/null
+++ b/tests/spec/ext_image_dma_buf_import/refcount.c
@@ -0,0 +1,134 @@
+/*
+ * Copyright © 2016 Broadcom
+ *
+ * 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.
+ */
+
+#include "sample_common.h"
+#include "image_common.h"
+
+/**
+ * @file refcount.c
+ *
+ * Creates two EGL images from an ARGB8888 dmabuf, samples each one,
+ * destroys one, then tests that the other can still be sampled.
+ *
+ * This gets at a common refcounting bug in drivers: GEM returns the
+ * same handle for a given BO re-opened through dmabuf on the same
+ * device fd, but that GEM handle is not refcounted.  The userspace
+ * driver needs to be sure that it's doing handle refcounting itself.
+ */
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+	config.supports_gl_es_version = 20;
+	config.window_visual = PIGLIT_GL_VISUAL_RGBA;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+enum piglit_result
+piglit_display(void)
+{
+	static int fourcc = fourcc_code('A', 'R', '2', '4');
+	int w = 2, h = 2;
+	const unsigned char src[] = {
+		0x00, 0x00, 0xff, 0xff,
+		0x00, 0xff, 0x00, 0xff,
+		0xff, 0x00, 0x00, 0xff,
+		0xff, 0xff, 0xff, 0xff
+	};
+	int cpp = 4;
+	enum piglit_result res;
+	struct piglit_dma_buf *buf;
+	unsigned stride, offset;
+	int fd;
+	EGLImageKHR img1, img2;
+	GLuint tex1, tex2;
+	/* Scale up factor for drawing the texture to the screen. */
+	int scale = 10;
+	int y_spacing = h * scale + 5;
+	int i;
+	GLubyte *expected;
+
+	res = piglit_create_dma_buf(w, h, cpp, src, w * cpp,
+				    &buf, &fd, &stride, &offset);
+	if (res != PIGLIT_PASS)
+		return res;
+
+	res = egl_image_for_dma_buf_fd(dup(fd), fourcc, w, h, stride, offset,
+				       &img1);
+	if (res != PIGLIT_PASS)
+		return res;
+
+	res = egl_image_for_dma_buf_fd(dup(fd), fourcc, w, h, stride, offset,
+				       &img2);
+	if (res != PIGLIT_PASS)
+		return res;
+
+	close(fd);
+
+	res = texture_for_egl_image(img1, &tex1);
+	if (res != PIGLIT_PASS)
+		return res;
+
+	res = texture_for_egl_image(img2, &tex2);
+	if (res != PIGLIT_PASS)
+		return res;
+
+	sample_tex(tex1,
+		   0, y_spacing * 0,
+		   w * scale, h * scale);
+	sample_tex(tex2,
+		   0, y_spacing * 1,
+		   w * scale, h * scale);
+
+	glDeleteTextures(1, &tex2);
+	eglDestroyImageKHR(eglGetCurrentDisplay(), img2);
+
+	sample_tex(tex1,
+		   0, y_spacing * 2,
+		   w * scale, h * scale);
+
+	expected = piglit_rgbw_image_ubyte(w * scale, h * scale, false);
+
+	for (i = 0; i < 3; i++) {
+		if (!piglit_probe_image_ubyte(0,
+					      y_spacing * i,
+					      w * scale, h * scale,
+					      GL_RGBA, expected)) {
+			res = PIGLIT_FAIL;
+		}
+	}
+
+	free(expected);
+
+	piglit_present_results();
+
+	return res;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+	EGLDisplay egl_dpy = eglGetCurrentDisplay();
+
+	piglit_require_egl_extension(egl_dpy, "EGL_EXT_image_dma_buf_import");
+	piglit_require_extension("GL_OES_EGL_image_external");
+}
diff --git a/tests/spec/ext_image_dma_buf_import/sample_common.c b/tests/spec/ext_image_dma_buf_import/sample_common.c
index 076d6245e..c5aa1e1b9 100644
--- a/tests/spec/ext_image_dma_buf_import/sample_common.c
+++ b/tests/spec/ext_image_dma_buf_import/sample_common.c
@@ -85,7 +85,7 @@ texture_for_egl_image(EGLImageKHR img, GLuint *out_tex)
 }
 
 void
-sample_tex(GLuint tex, unsigned w, unsigned h)
+sample_tex(GLuint tex, unsigned x, unsigned y, unsigned w, unsigned h)
 {
 	GLuint prog;
 
@@ -96,7 +96,7 @@ sample_tex(GLuint tex, unsigned w, unsigned h)
 	glBindTexture(GL_TEXTURE_EXTERNAL_OES, tex);
 	glUniform1i(glGetUniformLocation(prog, "sampler"), 0);
 
-	glViewport(0, 0, w, h);
+	glViewport(x, y, w, h);
 	piglit_draw_rect_tex(-1, -1, 2, 2,
 			     0, 0, 1, 1);
 
@@ -215,7 +215,7 @@ sample_buffer(void *buf, int fd, int fourcc, unsigned w, unsigned h,
 	if (res != PIGLIT_PASS)
 		goto destroy;
 
-	sample_tex(tex, w, h);
+	sample_tex(tex, 0, 0, w, h);
 
 destroy:
 	glDeleteTextures(1, &tex);
diff --git a/tests/spec/ext_image_dma_buf_import/sample_common.h b/tests/spec/ext_image_dma_buf_import/sample_common.h
index 6964dc12f..db2ff82a2 100644
--- a/tests/spec/ext_image_dma_buf_import/sample_common.h
+++ b/tests/spec/ext_image_dma_buf_import/sample_common.h
@@ -43,6 +43,6 @@ enum piglit_result
 texture_for_egl_image(EGLImageKHR img, GLuint *out_tex);
 
 void
-sample_tex(GLuint tex, unsigned w, unsigned h);
+sample_tex(GLuint tex, unsigned x, unsigned y, unsigned w, unsigned h);
 
 #endif /* SAMPLE_COMMON_H */