[Intel-gfx] [PATCH 22/27] drm/i915/guc: Add basic GuC multi-lrc selftest

Matthew Brost
2021-08-20T22:51:14Z

Add very basic (single submission) multi-lrc selftest.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
.../gpu/drm/i915/gt/uc/intel_guc_submission.c | 1 +
.../drm/i915/gt/uc/selftest_guc_multi_lrc.c | 180 ++++++++++++++++++
.../drm/i915/selftests/i915_live_selftests.h | 1 +
3 files changed, 182 insertions(+)
create mode 100644 drivers/gpu/drm/i915/gt/uc/selftest_guc_multi_lrc.c

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
index 2554d0eb4afd..91330525330d 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -3924,4 +3924,5 @@ bool intel_guc_virtual_engine_has_heartbeat(const struct intel_engine_cs *ve)

#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
#include "selftest_guc.c"
+#include "selftest_guc_multi_lrc.c"
#endif
diff --git a/drivers/gpu/drm/i915/gt/uc/selftest_guc_multi_lrc.c b/drivers/gpu/drm/i915/gt/uc/selftest_guc_multi_lrc.c
new file mode 100644
index 000000000000..dacfc5dfadd6
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/uc/selftest_guc_multi_lrc.c
@@ -0,0 +1,180 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright �� 2019 Intel Corporation
+ */
+
+#include "selftests/igt_spinner.h"
+#include "selftests/igt_reset.h"
+#include "selftests/intel_scheduler_helpers.h"
+#include "gt/intel_engine_heartbeat.h"
+#include "gem/selftests/mock_context.h"
+
+static void logical_sort(struct intel_engine_cs **engines, int num_engines)
+{
+ struct intel_engine_cs *sorted[MAX_ENGINE_INSTANCE + 1];
+ int i, j;
+
+ for (i = 0; i < num_engines; ++i)
+ for (j = 0; j < MAX_ENGINE_INSTANCE + 1; ++j) {
+ if (engines[j]->logical_mask & BIT(i)) {
+ sorted[i] = engines[j];
+ break;
+ }
+ }
+
+ memcpy(*engines, *sorted,
+ sizeof(struct intel_engine_cs *) * num_engines);
+}
+
+static struct intel_context *
+multi_lrc_create_parent(struct intel_gt *gt, u8 class,
+ unsigned long flags)
+{
+ struct intel_engine_cs *siblings[MAX_ENGINE_INSTANCE + 1];
+ struct intel_engine_cs *engine;
+ enum intel_engine_id id;
+ int i = 0;
+
+ for_each_engine(engine, gt, id) {
+ if (engine->class != class)
+ continue;
+
+ siblings[i++] = engine;
+ }
+
+ if (i <= 1)
+ return ERR_PTR(0);
+
+ logical_sort(siblings, i);
+
+ return intel_engine_create_parallel(siblings, 1, i);
+}
+
+static void multi_lrc_context_unpin(struct intel_context *ce)
+{
+ struct intel_context *child;
+
+ GEM_BUG_ON(!intel_context_is_parent(ce));
+
+ for_each_child(ce, child)
+ intel_context_unpin(child);
+ intel_context_unpin(ce);
+}
+
+static void multi_lrc_context_put(struct intel_context *ce)
+{
+ GEM_BUG_ON(!intel_context_is_parent(ce));
+
+ /*
+ * Only the parent gets the creation ref put in the uAPI, the parent
+ * itself is responsible for creation ref put on the children.
+ */
+ intel_context_put(ce);
+}
+
+static struct i915_request *
+multi_lrc_nop_request(struct intel_context *ce)
+{
+ struct intel_context *child;
+ struct i915_request *rq, *child_rq;
+ int i = 0;
+
+ GEM_BUG_ON(!intel_context_is_parent(ce));
+
+ rq = intel_context_create_request(ce);
+ if (IS_ERR(rq))
+ return rq;
+
+ i915_request_get(rq);
+ i915_request_add(rq);
+
+ for_each_child(ce, child) {
+ child_rq = intel_context_create_request(child);
+ if (IS_ERR(child_rq))
+ goto child_error;
+
+ if (++i == ce->guc_number_children)
+ set_bit(I915_FENCE_FLAG_SUBMIT_PARALLEL,
+ &child_rq->fence.flags);
+ i915_request_add(child_rq);
+ }
+
+ return rq;
+
+child_error:
+ i915_request_put(rq);
+
+ return ERR_PTR(-ENOMEM);
+}
+
+static int __intel_guc_multi_lrc_basic(struct intel_gt *gt, unsigned int class)
+{
+ struct intel_context *parent;
+ struct i915_request *rq;
+ int ret;
+
+ parent = multi_lrc_create_parent(gt, class, 0);
+ if (IS_ERR(parent)) {
+ pr_err("Failed creating contexts: %ld", PTR_ERR(parent));
+ return PTR_ERR(parent);
+ } else if (!parent) {
+ pr_debug("Not enough engines in class: %d",
+ VIDEO_DECODE_CLASS);
+ return 0;
+ }
+
+ rq = multi_lrc_nop_request(parent);
+ if (IS_ERR(rq)) {
+ ret = PTR_ERR(rq);
+ pr_err("Failed creating requests: %d", ret);
+ goto out;
+ }
+
+ ret = intel_selftest_wait_for_rq(rq);
+ if (ret)
+ pr_err("Failed waiting on request: %d", ret);
+
+ i915_request_put(rq);
+
+ if (ret >= 0) {
+ ret = intel_gt_wait_for_idle(gt, HZ * 5);
+ if (ret < 0)
+ pr_err("GT failed to idle: %d\n", ret);
+ }
+
+out:
+ multi_lrc_context_unpin(parent);
+ multi_lrc_context_put(parent);
+ return ret;
+}
+
+static int intel_guc_multi_lrc_basic(void *arg)
+{
+ struct intel_gt *gt = arg;
+ unsigned int class;
+ int ret;
+
+ for (class = 0; class < MAX_ENGINE_CLASS + 1; ++class) {
+ ret = __intel_guc_multi_lrc_basic(gt, class);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+int intel_guc_multi_lrc_live_selftests(struct drm_i915_private *i915)
+{
+ static const struct i915_subtest tests[] = {
+ SUBTEST(intel_guc_multi_lrc_basic),
+ };
+ struct intel_gt *gt = &i915->gt;
+
+ if (intel_gt_is_wedged(gt))
+ return 0;
+
+ if (!intel_uc_uses_guc_submission(&gt->uc))
+ return 0;
+
+ return intel_gt_live_subtests(tests, gt);
+}
diff --git a/drivers/gpu/drm/i915/selftests/i915_live_selftests.h b/drivers/gpu/drm/i915/selftests/i915_live_selftests.h
index 3cf6758931f9..bdd290f2bf3c 100644
--- a/drivers/gpu/drm/i915/selftests/i915_live_selftests.h
+++ b/drivers/gpu/drm/i915/selftests/i915_live_selftests.h
@@ -48,5 +48,6 @@ selftest(ring_submission, intel_ring_submission_live_selftests)
selftest(perf, i915_perf_live_selftests)
selftest(slpc, intel_slpc_live_selftests)
selftest(guc, intel_guc_live_selftests)
+selftest(guc_multi_lrc, intel_guc_multi_lrc_live_selftests)
/* Here be dragons: keep last to run last! */
selftest(late_gt_pm, intel_gt_pm_late_selftests)
--
2.32.0