[igt-dev] [RFC v2 3/3] tests: gem_gem_query_engines_demo: create test

[Andi Shyti <andi.shyti@intel.com>]

The "gem_query_engines_demo" is a demo test used to show how to
use the new API in commit 65d2f30d ("lib: implement new engine
discovery interface").

The new API has uses two new ioctls to interrogate the driver
about the engines.

The test simply gets the engines and executes a buffer.

Signed-off-by: Andi Shyti <andi.shyti@intel.com>
---
 tests/Makefile.sources              |  3 ++
 tests/i915/gem_query_engines_demo.c | 56 +++++++++++++++++++++++++++++
 tests/meson.build                   |  1 +
 3 files changed, 60 insertions(+)
 create mode 100644 tests/i915/gem_query_engines_demo.c

diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index 5620c1d6..e91d15f2 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -494,6 +494,9 @@ i915_selftest_SOURCES = i915/selftest.c
 TESTS_progs += i915_suspend
 i915_suspend_SOURCES = i915/suspend.c
 
+TESTS_progs += gem_query_engines_demo
+discover_engines_SOURCES = i915/gem_query_engines_demo.c
+
 TESTS_progs_X = gem_concurrent_all
 gem_concurrent_all_SOURCES = i915/gem_concurrent_all.c
 
diff --git a/tests/i915/gem_query_engines_demo.c b/tests/i915/gem_query_engines_demo.c
new file mode 100644
index 00000000..dc6b031e
--- /dev/null
+++ b/tests/i915/gem_query_engines_demo.c
@@ -0,0 +1,56 @@
+#include "igt.h"
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <time.h>
+#include "drm.h"
+
+static void execbuf_in_ctx(int fd, uint32_t engine, uint32_t ctx, uint32_t handle)
+{
+	struct drm_i915_gem_exec_object2 exec = {
+		.handle = handle,
+	};
+	struct drm_i915_gem_execbuffer2 execbuf = {
+		.buffers_ptr = to_user_pointer(&exec),
+		.buffer_count = 1,
+		.flags = engine,
+		.rsvd1 = ctx & I915_EXEC_CONTEXT_ID_MASK,
+	};
+
+	gem_execbuf(fd, &execbuf);
+}
+
+igt_main
+{
+	int fd;
+	uint32_t ctx_id, e;
+	uint32_t handle;
+	uint32_t bbend = MI_BATCH_BUFFER_END;
+
+	igt_fixture {
+		fd = drm_open_driver(DRIVER_INTEL);
+		ctx_id = gem_context_create(fd);
+
+		handle = gem_create(fd, 4096);
+		gem_write(fd, handle, 0, &bbend, sizeof(bbend));
+	}
+
+	igt_subtest("basic") {
+		for_each_engine_ctx(fd, ctx_id, e)
+			execbuf_in_ctx(fd, e, ctx_id, handle);
+	}
+
+	igt_fixture {
+		gem_close(fd, handle);
+		gem_context_destroy(fd, ctx_id);
+		close(fd);
+	}
+}
diff --git a/tests/meson.build b/tests/meson.build
index 52f91a22..0c091cf3 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -217,6 +217,7 @@ gem_progs = [
 	'gem_wait',
 	'gem_workarounds',
 	'gem_write_read_ring_switch',
+	'gem_query_engines_demo',
 ]
 
 gen3_progs = [
-- 
2.19.1

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