[Intel-gfx] [PATCH i-g-t v2] i915/gen9_exec_parse: Check parsing of large objects

[Chris Wilson]

Simply check that we support parsing of batches as large as the uAPI
allows.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
---
Try a few intermediate object sizes since CI machines do not have enough
memory to reach the upper bounds of the uAPI.
---
 tests/i915/gen9_exec_parse.c | 47 ++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/tests/i915/gen9_exec_parse.c b/tests/i915/gen9_exec_parse.c
index 8cd82f568..f735e7e1c 100644
--- a/tests/i915/gen9_exec_parse.c
+++ b/tests/i915/gen9_exec_parse.c
@@ -566,6 +566,50 @@ static void test_bb_start(const int i915, const uint32_t handle, int test)
 	gem_close(i915, target_bo);
 }
 
+static void test_bb_large(int i915)
+{
+	const uint32_t bbe = MI_BATCH_BUFFER_END;
+	static const uint32_t sizes[] = {
+		(1ull << 30) - 4096,
+		(1ull << 30) + 4096,
+		(2ull << 30) - 4096,
+		(2ull << 30) + 4096,
+		(3ull << 30) - 4096,
+		(3ull << 30) + 4096,
+		(4ull << 30) - 4096,
+	};
+	struct drm_i915_gem_exec_object2 obj = {};
+	struct drm_i915_gem_execbuffer2 execbuf = {
+		.buffers_ptr = to_user_pointer(&obj),
+		.buffer_count = 1,
+		.flags = I915_EXEC_BLT,
+	};
+	uint64_t required, total;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(sizes); i++) {
+		if (!__intel_check_memory(2, sizes[i], CHECK_RAM,
+					  &required, &total))
+			break;
+
+		igt_debug("Using object size %#x\n", sizes[i]);
+		obj.handle = gem_create(i915, sizes[i]),
+		gem_write(i915, obj.handle, sizes[i] - 64, &bbe, sizeof(bbe));
+
+		execbuf.batch_start_offset = 0;
+		igt_assert_eq(__checked_execbuf(i915, &execbuf), 0);
+
+		execbuf.batch_start_offset = sizes[i] - 64;
+		igt_assert_eq(__checked_execbuf(i915, &execbuf), 0);
+
+		gem_close(i915, obj.handle);
+	}
+
+	igt_require_f(i > 0 && sizes[i - 1] > 1ull << 31,
+		      "Insufficient free memory, require at least %'"PRIu64"MiB but only have %'"PRIu64"MiB available",
+		      required >> 20, total >> 20);
+}
+
 static void test_bb_chained(const int i915, const uint32_t handle)
 {
 	const uint32_t batch[] = {
@@ -1053,6 +1097,9 @@ igt_main
 	igt_subtest("bb-start-far")
 		test_bb_start(i915, handle, BB_START_FAR);
 
+	igt_subtest("bb-large")
+		test_bb_large(i915);
+
 	igt_fixture {
 		igt_stop_hang_detector();
 		gem_close(i915, handle);
-- 
2.28.0