On 7/28/2022 11:26, John.C.Harrison@xxxxxxxxx wrote:
From: Rahul Kumar Singh <rahul.kumar.singh@xxxxxxxxx>
Add a test to check that the hangcheck will recover from a submission
hang in the GuC.
Signed-off-by: Rahul Kumar Singh <rahul.kumar.singh@xxxxxxxxx>
Signed-off-by: John Harrison <John.C.Harrison@xxxxxxxxx>
Reviewed-by: John Harrison <John.C.Harrison@xxxxxxxxx>
---
.../gpu/drm/i915/gt/uc/intel_guc_submission.c | 1 +
.../drm/i915/gt/uc/selftest_guc_hangcheck.c | 159 ++++++++++++++++++
.../drm/i915/selftests/i915_live_selftests.h | 1 +
3 files changed, 161 insertions(+)
create mode 100644 drivers/gpu/drm/i915/gt/uc/selftest_guc_hangcheck.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 0b8c6450fa344..ff205c4125857 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -5177,4 +5177,5 @@ 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"
+#include "selftest_guc_hangcheck.c"
#endif
diff --git a/drivers/gpu/drm/i915/gt/uc/selftest_guc_hangcheck.c b/drivers/gpu/drm/i915/gt/uc/selftest_guc_hangcheck.c
new file mode 100644
index 0000000000000..01f8cd3c31340
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/uc/selftest_guc_hangcheck.c
@@ -0,0 +1,159 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2022 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"
+
+#define BEAT_INTERVAL 100
+
+static struct i915_request *nop_request(struct intel_engine_cs *engine)
+{
+ struct i915_request *rq;
+
+ rq = intel_engine_create_kernel_request(engine);
+ if (IS_ERR(rq))
+ return rq;
+
+ i915_request_get(rq);
+ i915_request_add(rq);
+
+ return rq;
+}
+
+static int intel_hang_guc(void *arg)
+{
+ struct intel_gt *gt = arg;
+ int ret = 0;
+ struct i915_gem_context *ctx;
+ struct intel_context *ce;
+ struct igt_spinner spin;
+ struct i915_request *rq;
+ intel_wakeref_t wakeref;
+ struct i915_gpu_error *global = >->i915->gpu_error;
+ struct intel_engine_cs *engine;
+ unsigned int reset_count;
+ u32 guc_status;
+ u32 old_beat;
+
+ ctx = kernel_context(gt->i915, NULL);
+ if (IS_ERR(ctx)) {
+ drm_err(>->i915->drm, "Failed get kernel context: %ld\n", PTR_ERR(ctx));
+ return PTR_ERR(ctx);
+ }
+
+ wakeref = intel_runtime_pm_get(gt->uncore->rpm);
+
+ ce = intel_context_create(gt->engine[BCS0]);
+ if (IS_ERR(ce)) {
+ ret = PTR_ERR(ce);
+ drm_err(>->i915->drm, "Failed to create spinner request: %d\n", ret);
+ goto err;
+ }
+
+ engine = ce->engine;
+ reset_count = i915_reset_count(global);
+
+ old_beat = engine->props.heartbeat_interval_ms;
+ ret = intel_engine_set_heartbeat(engine, BEAT_INTERVAL);
+ if (ret) {
+ drm_err(>->i915->drm, "Failed to boost heatbeat interval: %d\n", ret);
+ goto err;
+ }
+
+ ret = igt_spinner_init(&spin, engine->gt);
+ if (ret) {
+ drm_err(>->i915->drm, "Failed to create spinner: %d\n", ret);
+ goto err;
+ }
+
+ rq = igt_spinner_create_request(&spin, ce, MI_NOOP);
+ intel_context_put(ce);
+ if (IS_ERR(rq)) {
+ ret = PTR_ERR(rq);
+ drm_err(>->i915->drm, "Failed to create spinner request: %d\n", ret);
+ goto err_spin;
+ }
+
+ ret = request_add_spin(rq, &spin);
+ if (ret) {
+ i915_request_put(rq);
+ drm_err(>->i915->drm, "Failed to add Spinner request: %d\n", ret);
+ goto err_spin;
+ }
+
+ ret = intel_reset_guc(gt);
+ if (ret) {
+ i915_request_put(rq);
+ drm_err(>->i915->drm, "Failed to reset GuC, ret = %d\n", ret);
+ goto err_spin;
+ }
+
+ guc_status = intel_uncore_read(gt->uncore, GUC_STATUS);
+ if (!(guc_status & GS_MIA_IN_RESET)) {
+ i915_request_put(rq);
+ drm_err(>->i915->drm, "GuC failed to reset: status = 0x%08X\n", guc_status);
+ ret = -EIO;
+ goto err_spin;
+ }
+
+ /* Wait for the heartbeat to cause a reset */
+ ret = intel_selftest_wait_for_rq(rq);
+ i915_request_put(rq);
+ if (ret) {
+ drm_err(>->i915->drm, "Request failed to complete: %d\n", ret);
+ goto err_spin;
+ }
+
+ if (i915_reset_count(global) == reset_count) {
+ drm_err(>->i915->drm, "Failed to record a GPU reset\n");
+ ret = -EINVAL;
+ goto err_spin;
+ }
+
+err_spin:
+ igt_spinner_end(&spin);
+ igt_spinner_fini(&spin);
+ intel_engine_set_heartbeat(engine, old_beat);
+
+ if (ret == 0) {
+ rq = nop_request(engine);
+ if (IS_ERR(rq)) {
+ ret = PTR_ERR(rq);
+ goto err;
+ }
+
+ ret = intel_selftest_wait_for_rq(rq);
+ i915_request_put(rq);
+ if (ret) {
+ drm_err(>->i915->drm, "No-op failed to complete: %d\n", ret);
+ goto err;
+ }
+ }
+
+err:
+ intel_runtime_pm_put(gt->uncore->rpm, wakeref);
+ kernel_context_close(ctx);
+
+ return ret;
+}
+
+int intel_guc_hang_check(struct drm_i915_private *i915)
+{
+ static const struct i915_subtest tests[] = {
+ SUBTEST(intel_hang_guc),
+ };
+ struct intel_gt *gt = to_gt(i915);
+
+ if (intel_gt_is_wedged(gt))
+ return 0;
+
+ if (!intel_uc_uses_guc_submission(>->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 bdd290f2bf3cd..aaf8a380e5c78 100644
--- a/drivers/gpu/drm/i915/selftests/i915_live_selftests.h
+++ b/drivers/gpu/drm/i915/selftests/i915_live_selftests.h
@@ -49,5 +49,6 @@ 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)
+selftest(guc_hang, intel_guc_hang_check)
/* Here be dragons: keep last to run last! */
selftest(late_gt_pm, intel_gt_pm_late_selftests)
