Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 302 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/gt/uc/selftest_guc.c b/drivers/gpu/drm/i915/gt/uc/selftest_guc.c
new file mode 100644
index 000000000..e28518fe8
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/uc/selftest_guc.c
@@ -0,0 +1,302 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright �� 2021 Intel Corporation
+ */
+
+#include "selftests/igt_spinner.h"
+#include "selftests/intel_scheduler_helpers.h"
+
+static int request_add_spin(struct i915_request *rq, struct igt_spinner *spin)
+{
+	int err = 0;
+
+	i915_request_get(rq);
+	i915_request_add(rq);
+	if (spin && !igt_wait_for_spinner(spin, rq))
+		err = -ETIMEDOUT;
+
+	return err;
+}
+
+static struct i915_request *nop_user_request(struct intel_context *ce,
+					     struct i915_request *from)
+{
+	struct i915_request *rq;
+	int ret;
+
+	rq = intel_context_create_request(ce);
+	if (IS_ERR(rq))
+		return rq;
+
+	if (from) {
+		ret = i915_sw_fence_await_dma_fence(&rq->submit,
+						    &from->fence, 0,
+						    I915_FENCE_GFP);
+		if (ret < 0) {
+			i915_request_put(rq);
+			return ERR_PTR(ret);
+		}
+	}
+
+	i915_request_get(rq);
+	i915_request_add(rq);
+
+	return rq;
+}
+
+static int intel_guc_scrub_ctbs(void *arg)
+{
+	struct intel_gt *gt = arg;
+	int ret = 0;
+	int i;
+	struct i915_request *last[3] = {NULL, NULL, NULL}, *rq;
+	intel_wakeref_t wakeref;
+	struct intel_engine_cs *engine;
+	struct intel_context *ce;
+
+	if (!intel_has_gpu_reset(gt))
+		return 0;
+
+	wakeref = intel_runtime_pm_get(gt->uncore->rpm);
+	engine = intel_selftest_find_any_engine(gt);
+
+	/* Submit requests and inject errors forcing G2H to be dropped */
+	for (i = 0; i < 3; ++i) {
+		ce = intel_context_create(engine);
+		if (IS_ERR(ce)) {
+			ret = PTR_ERR(ce);
+			drm_err(&gt->i915->drm, "Failed to create context, %d: %d\n", i, ret);
+			goto err;
+		}
+
+		switch (i) {
+		case 0:
+			ce->drop_schedule_enable = true;
+			break;
+		case 1:
+			ce->drop_schedule_disable = true;
+			break;
+		case 2:
+			ce->drop_deregister = true;
+			break;
+		}
+
+		rq = nop_user_request(ce, NULL);
+		intel_context_put(ce);
+
+		if (IS_ERR(rq)) {
+			ret = PTR_ERR(rq);
+			drm_err(&gt->i915->drm, "Failed to create request, %d: %d\n", i, ret);
+			goto err;
+		}
+
+		last[i] = rq;
+	}
+
+	for (i = 0; i < 3; ++i) {
+		ret = i915_request_wait(last[i], 0, HZ);
+		if (ret < 0) {
+			drm_err(&gt->i915->drm, "Last request failed to complete: %d\n", ret);
+			goto err;
+		}
+		i915_request_put(last[i]);
+		last[i] = NULL;
+	}
+
+	/* Force all H2G / G2H to be submitted / processed */
+	intel_gt_retire_requests(gt);
+	msleep(500);
+
+	/* Scrub missing G2H */
+	intel_gt_handle_error(engine->gt, -1, 0, "selftest reset");
+
+	/* GT will not idle if G2H are lost */
+	ret = intel_gt_wait_for_idle(gt, HZ);
+	if (ret < 0) {
+		drm_err(&gt->i915->drm, "GT failed to idle: %d\n", ret);
+		goto err;
+	}
+
+err:
+	for (i = 0; i < 3; ++i)
+		if (last[i])
+			i915_request_put(last[i]);
+	intel_runtime_pm_put(gt->uncore->rpm, wakeref);
+
+	return ret;
+}
+
+/*
+ * intel_guc_steal_guc_ids - Test to exhaust all guc_ids and then steal one
+ *
+ * This test creates a spinner which is used to block all subsequent submissions
+ * until it completes. Next, a loop creates a context and a NOP request each
+ * iteration until the guc_ids are exhausted (request creation returns -EAGAIN).
+ * The spinner is ended, unblocking all requests created in the loop. At this
+ * point all guc_ids are exhausted but are available to steal. Try to create
+ * another request which should successfully steal a guc_id. Wait on last
+ * request to complete, idle GPU, verify a guc_id was stolen via a counter, and
+ * exit the test. Test also artificially reduces the number of guc_ids so the
+ * test runs in a timely manner.
+ */
+static int intel_guc_steal_guc_ids(void *arg)
+{
+	struct intel_gt *gt = arg;
+	struct intel_guc *guc = &gt->uc.guc;
+	int ret, sv, context_index = 0;
+	intel_wakeref_t wakeref;
+	struct intel_engine_cs *engine;
+	struct intel_context **ce;
+	struct igt_spinner spin;
+	struct i915_request *spin_rq = NULL, *rq, *last = NULL;
+	int number_guc_id_stolen = guc->number_guc_id_stolen;
+
+	ce = kcalloc(GUC_MAX_CONTEXT_ID, sizeof(*ce), GFP_KERNEL);
+	if (!ce) {
+		drm_err(&gt->i915->drm, "Context array allocation failed\n");
+		return -ENOMEM;
+	}
+
+	wakeref = intel_runtime_pm_get(gt->uncore->rpm);
+	engine = intel_selftest_find_any_engine(gt);
+	sv = guc->submission_state.num_guc_ids;
+	guc->submission_state.num_guc_ids = 512;
+
+	/* Create spinner to block requests in below loop */
+	ce[context_index] = intel_context_create(engine);
+	if (IS_ERR(ce[context_index])) {
+		ret = PTR_ERR(ce[context_index]);
+		ce[context_index] = NULL;
+		drm_err(&gt->i915->drm, "Failed to create context: %d\n", ret);
+		goto err_wakeref;
+	}
+	ret = igt_spinner_init(&spin, engine->gt);
+	if (ret) {
+		drm_err(&gt->i915->drm, "Failed to create spinner: %d\n", ret);
+		goto err_contexts;
+	}
+	spin_rq = igt_spinner_create_request(&spin, ce[context_index],
+					     MI_ARB_CHECK);
+	if (IS_ERR(spin_rq)) {
+		ret = PTR_ERR(spin_rq);
+		drm_err(&gt->i915->drm, "Failed to create spinner request: %d\n", ret);
+		goto err_contexts;
+	}
+	ret = request_add_spin(spin_rq, &spin);
+	if (ret) {
+		drm_err(&gt->i915->drm, "Failed to add Spinner request: %d\n", ret);
+		goto err_spin_rq;
+	}
+
+	/* Use all guc_ids */
+	while (ret != -EAGAIN) {
+		ce[++context_index] = intel_context_create(engine);
+		if (IS_ERR(ce[context_index])) {
+			ret = PTR_ERR(ce[context_index--]);
+			ce[context_index] = NULL;
+			drm_err(&gt->i915->drm, "Failed to create context: %d\n", ret);
+			goto err_spin_rq;
+		}
+
+		rq = nop_user_request(ce[context_index], spin_rq);
+		if (IS_ERR(rq)) {
+			ret = PTR_ERR(rq);
+			rq = NULL;
+			if (ret != -EAGAIN) {
+				drm_err(&gt->i915->drm, "Failed to create request, %d: %d\n",
+					context_index, ret);
+				goto err_spin_rq;
+			}
+		} else {
+			if (last)
+				i915_request_put(last);
+			last = rq;
+		}
+	}
+
+	/* Release blocked requests */
+	igt_spinner_end(&spin);
+	ret = intel_selftest_wait_for_rq(spin_rq);
+	if (ret) {
+		drm_err(&gt->i915->drm, "Spin request failed to complete: %d\n", ret);
+		i915_request_put(last);
+		goto err_spin_rq;
+	}
+	i915_request_put(spin_rq);
+	igt_spinner_fini(&spin);
+	spin_rq = NULL;
+
+	/* Wait for last request */
+	ret = i915_request_wait(last, 0, HZ * 30);
+	i915_request_put(last);
+	if (ret < 0) {
+		drm_err(&gt->i915->drm, "Last request failed to complete: %d\n", ret);
+		goto err_spin_rq;
+	}
+
+	/* Try to steal guc_id */
+	rq = nop_user_request(ce[context_index], NULL);
+	if (IS_ERR(rq)) {
+		ret = PTR_ERR(rq);
+		drm_err(&gt->i915->drm, "Failed to steal guc_id, %d: %d\n", context_index, ret);
+		goto err_spin_rq;
+	}
+
+	/* Wait for request with stolen guc_id */
+	ret = i915_request_wait(rq, 0, HZ);
+	i915_request_put(rq);
+	if (ret < 0) {
+		drm_err(&gt->i915->drm, "Request with stolen guc_id failed to complete: %d\n", ret);
+		goto err_spin_rq;
+	}
+
+	/* Wait for idle */
+	ret = intel_gt_wait_for_idle(gt, HZ * 30);
+	if (ret < 0) {
+		drm_err(&gt->i915->drm, "GT failed to idle: %d\n", ret);
+		goto err_spin_rq;
+	}
+
+	/* Verify a guc_id was stolen */
+	if (guc->number_guc_id_stolen == number_guc_id_stolen) {
+		drm_err(&gt->i915->drm, "No guc_id was stolen");
+		ret = -EINVAL;
+	} else {
+		ret = 0;
+	}
+
+err_spin_rq:
+	if (spin_rq) {
+		igt_spinner_end(&spin);
+		intel_selftest_wait_for_rq(spin_rq);
+		i915_request_put(spin_rq);
+		igt_spinner_fini(&spin);
+		intel_gt_wait_for_idle(gt, HZ * 30);
+	}
+err_contexts:
+	for (; context_index >= 0 && ce[context_index]; --context_index)
+		intel_context_put(ce[context_index]);
+err_wakeref:
+	intel_runtime_pm_put(gt->uncore->rpm, wakeref);
+	kfree(ce);
+	guc->submission_state.num_guc_ids = sv;
+
+	return ret;
+}
+
+int intel_guc_live_selftests(struct drm_i915_private *i915)
+{
+	static const struct i915_subtest tests[] = {
+		SUBTEST(intel_guc_scrub_ctbs),
+		SUBTEST(intel_guc_steal_guc_ids),
+	};
+	struct intel_gt *gt = to_gt(i915);
+
+	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);
+}