[Intel-gfx] [PATCH i-g-t 4/8] tests/i915/gem_exec_capture: Use contexts and engines properly

[John.C.Harrison@Intel.com]

From: John Harrison <John.C.Harrison@Intel.com>

Some of the capture tests were using explicit contexts, some not. Some
were poking the per engine pre-emption timeout, some not. This would
lead to sporadic failures due to random timeouts, contexts being
banned depending upon how many subtests were run and/or how many
engines a given platform has, and other such failures.

So, update all tests to be conistent.

Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
---
 tests/i915/gem_exec_capture.c | 80 +++++++++++++++++++++++++----------
 1 file changed, 58 insertions(+), 22 deletions(-)

diff --git a/tests/i915/gem_exec_capture.c b/tests/i915/gem_exec_capture.c
index c85c198f7..e373d24ed 100644
--- a/tests/i915/gem_exec_capture.c
+++ b/tests/i915/gem_exec_capture.c
@@ -204,8 +204,19 @@ static int check_error_state(int dir, struct offset *obj_offsets, int obj_count,
 	return blobs;
 }
 
+static void configure_hangs(int fd, const struct intel_execution_engine2 *e, int ctxt_id)
+{
+	/* Ensure fast hang detection */
+	gem_engine_property_printf(fd, e->name, "preempt_timeout_ms", "%d", 250);
+	gem_engine_property_printf(fd, e->name, "heartbeat_interval_ms", "%d", 500);
+
+	/* Allow engine based resets and disable banning */
+	igt_allow_hang(fd, ctxt_id, HANG_ALLOW_CAPTURE);
+}
+
 static void __capture1(int fd, int dir, uint64_t ahnd, const intel_ctx_t *ctx,
-		       unsigned ring, uint32_t target, uint64_t target_size)
+		       const struct intel_execution_engine2 *e,
+		       uint32_t target, uint64_t target_size)
 {
 	const unsigned int gen = intel_gen(intel_get_drm_devid(fd));
 	struct drm_i915_gem_exec_object2 obj[4];
@@ -219,6 +230,8 @@ static void __capture1(int fd, int dir, uint64_t ahnd, const intel_ctx_t *ctx,
 	struct offset offset;
 	int i;
 
+	configure_hangs(fd, e, ctx->id);
+
 	memset(obj, 0, sizeof(obj));
 	obj[SCRATCH].handle = gem_create(fd, 4096);
 	obj[SCRATCH].flags = EXEC_OBJECT_WRITE;
@@ -297,7 +310,7 @@ static void __capture1(int fd, int dir, uint64_t ahnd, const intel_ctx_t *ctx,
 	memset(&execbuf, 0, sizeof(execbuf));
 	execbuf.buffers_ptr = (uintptr_t)obj;
 	execbuf.buffer_count = ARRAY_SIZE(obj);
-	execbuf.flags = ring;
+	execbuf.flags = e->flags;
 	if (gen > 3 && gen < 6)
 		execbuf.flags |= I915_EXEC_SECURE;
 	execbuf.rsvd1 = ctx->id;
@@ -326,7 +339,8 @@ static void __capture1(int fd, int dir, uint64_t ahnd, const intel_ctx_t *ctx,
 	gem_close(fd, obj[SCRATCH].handle);
 }
 
-static void capture(int fd, int dir, const intel_ctx_t *ctx, unsigned ring)
+static void capture(int fd, int dir, const intel_ctx_t *ctx,
+		    const struct intel_execution_engine2 *e)
 {
 	uint32_t handle;
 	uint64_t ahnd;
@@ -335,7 +349,7 @@ static void capture(int fd, int dir, const intel_ctx_t *ctx, unsigned ring)
 	handle = gem_create(fd, obj_size);
 	ahnd = get_reloc_ahnd(fd, ctx->id);
 
-	__capture1(fd, dir, ahnd, ctx, ring, handle, obj_size);
+	__capture1(fd, dir, ahnd, ctx, e, handle, obj_size);
 
 	gem_close(fd, handle);
 	put_ahnd(ahnd);
@@ -355,9 +369,9 @@ static int cmp(const void *A, const void *B)
 }
 
 static struct offset *
-__captureN(int fd, int dir, uint64_t ahnd, unsigned ring,
-	      unsigned int size, int count,
-	      unsigned int flags)
+__captureN(int fd, int dir, uint64_t ahnd, const intel_ctx_t *ctx,
+	   const struct intel_execution_engine2 *e,
+	   unsigned int size, int count, unsigned int flags)
 #define INCREMENTAL 0x1
 #define ASYNC 0x2
 {
@@ -369,6 +383,8 @@ __captureN(int fd, int dir, uint64_t ahnd, unsigned ring,
 	struct offset *offsets;
 	int i;
 
+	configure_hangs(fd, e, ctx->id);
+
 	offsets = calloc(count, sizeof(*offsets));
 	igt_assert(offsets);
 
@@ -470,9 +486,10 @@ __captureN(int fd, int dir, uint64_t ahnd, unsigned ring,
 	memset(&execbuf, 0, sizeof(execbuf));
 	execbuf.buffers_ptr = (uintptr_t)obj;
 	execbuf.buffer_count = count + 2;
-	execbuf.flags = ring;
+	execbuf.flags = e->flags;
 	if (gen > 3 && gen < 6)
 		execbuf.flags |= I915_EXEC_SECURE;
+	execbuf.rsvd1 = ctx->id;
 
 	igt_assert(!READ_ONCE(*seqno));
 	gem_execbuf(fd, &execbuf);
@@ -505,10 +522,20 @@ __captureN(int fd, int dir, uint64_t ahnd, unsigned ring,
 
 static void many(int fd, int dir, uint64_t size, unsigned int flags)
 {
+	const struct intel_execution_engine2 *e;
+	const intel_ctx_t *ctx;
 	uint64_t ram, gtt, ahnd;
 	unsigned long count, blobs;
 	struct offset *offsets;
 
+	/* Find the first available engine: */
+	ctx = intel_ctx_create_all_physical(fd);
+	igt_assert(ctx);
+	for_each_ctx_engine(fd, ctx, e)
+		for_each_if(gem_class_can_store_dword(fd, e->class))
+			break;
+	igt_assert(e);
+
 	gtt = gem_aperture_size(fd) / size;
 	ram = (intel_get_avail_ram_mb() << 20) / size;
 	igt_debug("Available objects in GTT:%"PRIu64", RAM:%"PRIu64"\n",
@@ -518,9 +545,9 @@ static void many(int fd, int dir, uint64_t size, unsigned int flags)
 	igt_require(count > 1);
 
 	intel_require_memory(count, size, CHECK_RAM);
-	ahnd = get_reloc_ahnd(fd, 0);
+	ahnd = get_reloc_ahnd(fd, ctx->id);
 
-	offsets = __captureN(fd, dir, ahnd, 0, size, count, flags);
+	offsets = __captureN(fd, dir, ahnd, ctx, e, size, count, flags);
 
 	blobs = check_error_state(dir, offsets, count, size, !!(flags & INCREMENTAL));
 	igt_info("Captured %lu %"PRId64"-blobs out of a total of %lu\n",
@@ -531,7 +558,7 @@ static void many(int fd, int dir, uint64_t size, unsigned int flags)
 }
 
 static void prioinv(int fd, int dir, const intel_ctx_t *ctx,
-		    unsigned ring, const char *name)
+		    const struct intel_execution_engine2 *e)
 {
 	const uint32_t bbe = MI_BATCH_BUFFER_END;
 	struct drm_i915_gem_exec_object2 obj = {
@@ -540,7 +567,7 @@ static void prioinv(int fd, int dir, const intel_ctx_t *ctx,
 	struct drm_i915_gem_execbuffer2 execbuf = {
 		.buffers_ptr = to_user_pointer(&obj),
 		.buffer_count = 1,
-		.flags = ring,
+		.flags = e->flags,
 		.rsvd1 = ctx->id,
 	};
 	int64_t timeout = NSEC_PER_SEC; /* 1s, feeling generous, blame debug */
@@ -555,10 +582,6 @@ static void prioinv(int fd, int dir, const intel_ctx_t *ctx,
 	igt_require(igt_params_set(fd, "reset", "%u", -1)); /* engine resets! */
 	igt_require(gem_gpu_reset_type(fd) > 1);
 
-	/* Needs to be fast enough for the hangcheck to return within 1s */
-	igt_require(gem_engine_property_printf(fd, name, "preempt_timeout_ms", "%d", 0) > 0);
-	gem_engine_property_printf(fd, name, "preempt_timeout_ms", "%d", 500);
-
 	gtt = gem_aperture_size(fd) / size;
 	ram = (intel_get_avail_ram_mb() << 20) / size;
 	igt_debug("Available objects in GTT:%"PRIu64", RAM:%"PRIu64"\n",
@@ -576,15 +599,19 @@ static void prioinv(int fd, int dir, const intel_ctx_t *ctx,
 
 	igt_assert(pipe(link) == 0);
 	igt_fork(child, 1) {
+		const intel_ctx_t *ctx2;
 		fd = gem_reopen_driver(fd);
 		igt_debug("Submitting large capture [%ld x %dMiB objects]\n",
 			  count, (int)(size >> 20));
 
+		ctx2 = intel_ctx_create_all_physical(fd);
+		igt_assert(ctx2);
+
 		intel_allocator_init();
 		/* Reopen the allocator in the new process. */
-		ahnd = get_reloc_ahnd(fd, 0);
+		ahnd = get_reloc_ahnd(fd, ctx2->id);
 
-		free(__captureN(fd, dir, ahnd, ring, size, count, ASYNC));
+		free(__captureN(fd, dir, ahnd, ctx2, e, size, count, ASYNC));
 		put_ahnd(ahnd);
 
 		write(link[1], &fd, sizeof(fd)); /* wake the parent up */
@@ -615,18 +642,27 @@ static void prioinv(int fd, int dir, const intel_ctx_t *ctx,
 
 static void userptr(int fd, int dir)
 {
-	const intel_ctx_t *ctx = intel_ctx_0(fd);
+	const struct intel_execution_engine2 *e;
+	const intel_ctx_t *ctx;
 	uint32_t handle;
 	uint64_t ahnd;
 	void *ptr;
 	int obj_size = 4096;
 
+	/* Find the first available engine: */
+	ctx = intel_ctx_create_all_physical(fd);
+	igt_assert(ctx);
+	for_each_ctx_engine(fd, ctx, e)
+		for_each_if(gem_class_can_store_dword(fd, e->class))
+			break;
+	igt_assert(e);
+
 	igt_assert(posix_memalign(&ptr, obj_size, obj_size) == 0);
 	memset(ptr, 0, obj_size);
 	igt_require(__gem_userptr(fd, ptr, obj_size, 0, 0, &handle) == 0);
 	ahnd = get_reloc_ahnd(fd, ctx->id);
 
-	__capture1(fd, dir, ahnd, intel_ctx_0(fd), 0, handle, obj_size);
+	__capture1(fd, dir, ahnd, ctx, e, handle, obj_size);
 
 	gem_close(fd, handle);
 	put_ahnd(ahnd);
@@ -684,7 +720,7 @@ igt_main
 	}
 
 	test_each_engine("capture", fd, ctx, e)
-		capture(fd, dir, ctx, e->flags);
+		capture(fd, dir, ctx, e);
 
 	igt_subtest_f("many-4K-zero") {
 		igt_require(gem_can_store_dword(fd, 0));
@@ -719,7 +755,7 @@ igt_main
 	}
 
 	test_each_engine("pi", fd, ctx, e)
-		prioinv(fd, dir, ctx, e->flags, e->name);
+		prioinv(fd, dir, ctx, e);
 
 	igt_fixture {
 		close(dir);
-- 
2.25.1