igt: Add a helper function for getting a VC4 BO that's been drawn to.

v2: Use do_ioctl().

Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Daniel Stone <daniels@collabora.com>

lib/Makefile.sources

@@ -16,6 +16,8 @@ libintel_tools_la_SOURCES = 	\
 	igt_gt.h		\
 	igt_stats.c		\
 	igt_stats.h		\
+	igt_vc4.c		\
+	igt_vc4.h		\
 	instdone.c		\
 	instdone.h		\
 	intel_batchbuffer.c	\

lib/igt_vc4.c

@@ -0,0 +1,103 @@
+/*
+ * 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 <assert.h>
+#include <string.h>
+#include <signal.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+
+#include "drmtest.h"
+#include "igt_aux.h"
+#include "igt_core.h"
+#include "igt_vc4.h"
+#include "ioctl_wrappers.h"
+#include "intel_reg.h"
+#include "intel_chipset.h"
+#include "vc4_drm.h"
+#include "vc4_packet.h"
+
+#if NEW_CONTEXT_PARAM_NO_ERROR_CAPTURE_API
+#define LOCAL_CONTEXT_PARAM_NO_ERROR_CAPTURE 0x4
+#endif
+
+/**
+ * SECTION:igt_vc4
+ * @short_description: VC4 support library
+ * @title: VC4
+ * @include: igt.h
+ *
+ * This library provides various auxiliary helper functions for writing VC4
+ * tests.
+ */
+
+/**
+ * igt_vc4_get_cleared_bo:
+ * @size: size of the BO in bytes
+ * @clearval: u32 value that the buffer should be completely cleared with
+ *
+ * This helper returns a new BO with the given size, which has just been
+ * cleared using the render engine.
+ */
+uint32_t igt_vc4_get_cleared_bo(int fd, size_t size, uint32_t clearval)
+{
+	/* A single row will be a page. */
+	uint32_t width = 1024;
+	uint32_t height = size / (width * 4);
+	struct drm_vc4_create_bo create = {
+		.size = size,
+	};
+	struct drm_vc4_submit_cl submit = {
+		.color_write = {
+			.hindex = 0,
+			.bits = VC4_SET_FIELD(VC4_RENDER_CONFIG_FORMAT_RGBA8888,
+					      VC4_RENDER_CONFIG_FORMAT),
+		},
+
+		.color_read = { .hindex = ~0 },
+		.zs_read = { .hindex = ~0 },
+		.zs_write = { .hindex = ~0 },
+		.msaa_color_write = { .hindex = ~0 },
+		.msaa_zs_write = { .hindex = ~0 },
+
+		.bo_handles = (uint64_t)(uintptr_t)&create.handle,
+		.bo_handle_count = 1,
+		.width = width,
+		.height = height,
+		.max_x_tile = ALIGN(width, 64) / 64 - 1,
+		.max_y_tile = ALIGN(height, 64) / 64 - 1,
+		.clear_color = { clearval, clearval },
+		.flags = VC4_SUBMIT_CL_USE_CLEAR_COLOR,
+	};
+
+	igt_assert_eq_u32(width * height * 4, size);
+
+	do_ioctl(fd, DRM_IOCTL_VC4_CREATE_BO, &create);
+
+	do_ioctl(fd, DRM_IOCTL_VC4_SUBMIT_CL, &submit);
+
+	return create.handle;
+}

lib/igt_vc4.h

@@ -0,0 +1,29 @@
+/*
+ * 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.
+ */
+
+#ifndef IGT_VC4_H
+#define IGT_VC4_H
+
+uint32_t igt_vc4_get_cleared_bo(int fd, size_t size, uint32_t clearval);
+
+#endif /* IGT_VC4_H */