drm/i915/selftests: Enable selftesting of busy-stats

A couple of very simple tests to ensure that the basic properties of
per-engine busyness accounting [0% and 100% busy] are faithful.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200617130916.15261-1-chris@chris-wilson.co.uk

8 files changed, 212 insertions, 170 deletions

diff --git a/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c b/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
index 697114dd1f47..f3034c613bc0 100644
--- a/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
+++ b/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
@@ -10,6 +10,7 @@
 
 #include "intel_gt_requests.h"
 #include "i915_selftest.h"
+#include "selftest_engine_heartbeat.h"
 
 static int timeline_sync(struct intel_timeline *tl)
 {
@@ -142,24 +143,6 @@ out:
 	return err;
 }
 
-static void engine_heartbeat_disable(struct intel_engine_cs *engine,
-				     unsigned long *saved)
-{
-	*saved = engine->props.heartbeat_interval_ms;
-	engine->props.heartbeat_interval_ms = 0;
-
-	intel_engine_pm_get(engine);
-	intel_engine_park_heartbeat(engine);
-}
-
-static void engine_heartbeat_enable(struct intel_engine_cs *engine,
-				    unsigned long saved)
-{
-	intel_engine_pm_put(engine);
-
-	engine->props.heartbeat_interval_ms = saved;
-}
-
 static int live_idle_flush(void *arg)
 {
 	struct intel_gt *gt = arg;
@@ -170,11 +153,9 @@ static int live_idle_flush(void *arg)
 	/* Check that we can flush the idle barriers */
 
 	for_each_engine(engine, gt, id) {
-		unsigned long heartbeat;
-
-		engine_heartbeat_disable(engine, &heartbeat);
+		st_engine_heartbeat_disable(engine);
 		err = __live_idle_pulse(engine, intel_engine_flush_barriers);
-		engine_heartbeat_enable(engine, heartbeat);
+		st_engine_heartbeat_enable(engine);
 		if (err)
 			break;
 	}
@@ -192,11 +173,9 @@ static int live_idle_pulse(void *arg)
 	/* Check that heartbeat pulses flush the idle barriers */
 
 	for_each_engine(engine, gt, id) {
-		unsigned long heartbeat;
-
-		engine_heartbeat_disable(engine, &heartbeat);
+		st_engine_heartbeat_disable(engine);
 		err = __live_idle_pulse(engine, intel_engine_pulse);
-		engine_heartbeat_enable(engine, heartbeat);
+		st_engine_heartbeat_enable(engine);
 		if (err && err != -ENODEV)
 			break;
 
@@ -394,3 +373,19 @@ int intel_heartbeat_live_selftests(struct drm_i915_private *i915)
 	i915_modparams.enable_hangcheck = saved_hangcheck;
 	return err;
 }
+
+void st_engine_heartbeat_disable(struct intel_engine_cs *engine)
+{
+	engine->props.heartbeat_interval_ms = 0;
+
+	intel_engine_pm_get(engine);
+	intel_engine_park_heartbeat(engine);
+}
+
+void st_engine_heartbeat_enable(struct intel_engine_cs *engine)
+{
+	intel_engine_pm_put(engine);
+
+	engine->props.heartbeat_interval_ms =
+		engine->defaults.heartbeat_interval_ms;
+}
diff --git a/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.h b/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.h
new file mode 100644
index 000000000000..cd27113d5400
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+
+#ifndef SELFTEST_ENGINE_HEARTBEAT_H
+#define SELFTEST_ENGINE_HEARTBEAT_H
+
+struct intel_engine_cs;
+
+void st_engine_heartbeat_disable(struct intel_engine_cs *engine);
+void st_engine_heartbeat_enable(struct intel_engine_cs *engine);
+
+#endif /* SELFTEST_ENGINE_HEARTBEAT_H */
diff --git a/drivers/gpu/drm/i915/gt/selftest_engine_pm.c b/drivers/gpu/drm/i915/gt/selftest_engine_pm.c
index cbf6b0735272..dd54dcb5cca2 100644
--- a/drivers/gpu/drm/i915/gt/selftest_engine_pm.c
+++ b/drivers/gpu/drm/i915/gt/selftest_engine_pm.c
@@ -6,7 +6,109 @@
 
 #include "i915_selftest.h"
 #include "selftest_engine.h"
+#include "selftest_engine_heartbeat.h"
 #include "selftests/igt_atomic.h"
+#include "selftests/igt_flush_test.h"
+#include "selftests/igt_spinner.h"
+
+static int live_engine_busy_stats(void *arg)
+{
+	struct intel_gt *gt = arg;
+	struct intel_engine_cs *engine;
+	enum intel_engine_id id;
+	struct igt_spinner spin;
+	int err = 0;
+
+	/*
+	 * Check that if an engine supports busy-stats, they tell the truth.
+	 */
+
+	if (igt_spinner_init(&spin, gt))
+		return -ENOMEM;
+
+	GEM_BUG_ON(intel_gt_pm_is_awake(gt));
+	for_each_engine(engine, gt, id) {
+		struct i915_request *rq;
+		ktime_t de;
+		u64 dt;
+
+		if (!intel_engine_supports_stats(engine))
+			continue;
+
+		if (!intel_engine_can_store_dword(engine))
+			continue;
+
+		if (intel_gt_pm_wait_for_idle(gt)) {
+			err = -EBUSY;
+			break;
+		}
+
+		st_engine_heartbeat_disable(engine);
+
+		ENGINE_TRACE(engine, "measuring idle time\n");
+		preempt_disable();
+		dt = ktime_to_ns(ktime_get());
+		de = intel_engine_get_busy_time(engine);
+		udelay(100);
+		de = ktime_sub(intel_engine_get_busy_time(engine), de);
+		dt = ktime_to_ns(ktime_get()) - dt;
+		preempt_enable();
+		if (de < 0 || de > 10) {
+			pr_err("%s: reported %lldns [%d%%] busyness while sleeping [for %lldns]\n",
+			       engine->name,
+			       de, (int)div64_u64(100 * de, dt), dt);
+			GEM_TRACE_DUMP();
+			err = -EINVAL;
+			goto end;
+		}
+
+		/* 100% busy */
+		rq = igt_spinner_create_request(&spin,
+						engine->kernel_context,
+						MI_NOOP);
+		if (IS_ERR(rq)) {
+			err = PTR_ERR(rq);
+			goto end;
+		}
+		i915_request_add(rq);
+
+		if (!igt_wait_for_spinner(&spin, rq)) {
+			intel_gt_set_wedged(engine->gt);
+			err = -ETIME;
+			goto end;
+		}
+
+		ENGINE_TRACE(engine, "measuring busy time\n");
+		preempt_disable();
+		dt = ktime_to_ns(ktime_get());
+		de = intel_engine_get_busy_time(engine);
+		udelay(100);
+		de = ktime_sub(intel_engine_get_busy_time(engine), de);
+		dt = ktime_to_ns(ktime_get()) - dt;
+		preempt_enable();
+		if (100 * de < 95 * dt || 95 * de > 100 * dt) {
+			pr_err("%s: reported %lldns [%d%%] busyness while spinning [for %lldns]\n",
+			       engine->name,
+			       de, (int)div64_u64(100 * de, dt), dt);
+			GEM_TRACE_DUMP();
+			err = -EINVAL;
+			goto end;
+		}
+
+end:
+		st_engine_heartbeat_enable(engine);
+		igt_spinner_end(&spin);
+		if (igt_flush_test(gt->i915))
+			err = -EIO;
+		if (err)
+			break;
+	}
+
+	igt_spinner_fini(&spin);
+	if (igt_flush_test(gt->i915))
+		err = -EIO;
+	return err;
+}
 
 static int live_engine_pm(void *arg)
 {
@@ -77,6 +179,7 @@ static int live_engine_pm(void *arg)
 int live_engine_pm_selftests(struct intel_gt *gt)
 {
 	static const struct i915_subtest tests[] = {
+		SUBTEST(live_engine_busy_stats),
 		SUBTEST(live_engine_pm),
 	};
 
diff --git a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
index 7461936d549d..fb5ebf930ab2 100644
--- a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
+++ b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
@@ -29,6 +29,7 @@
 #include "intel_gt.h"
 #include "intel_engine_heartbeat.h"
 #include "intel_engine_pm.h"
+#include "selftest_engine_heartbeat.h"
 
 #include "i915_selftest.h"
 #include "selftests/i915_random.h"
@@ -310,22 +311,6 @@ static bool wait_until_running(struct hang *h, struct i915_request *rq)
 			  1000));
 }
 
-static void engine_heartbeat_disable(struct intel_engine_cs *engine)
-{
-	engine->props.heartbeat_interval_ms = 0;
-
-	intel_engine_pm_get(engine);
-	intel_engine_park_heartbeat(engine);
-}
-
-static void engine_heartbeat_enable(struct intel_engine_cs *engine)
-{
-	intel_engine_pm_put(engine);
-
-	engine->props.heartbeat_interval_ms =
-		engine->defaults.heartbeat_interval_ms;
-}
-
 static int igt_hang_sanitycheck(void *arg)
 {
 	struct intel_gt *gt = arg;
@@ -482,7 +467,7 @@ static int igt_reset_nop_engine(void *arg)
 		reset_engine_count = i915_reset_engine_count(global, engine);
 		count = 0;
 
-		engine_heartbeat_disable(engine);
+		st_engine_heartbeat_disable(engine);
 		set_bit(I915_RESET_ENGINE + id, &gt->reset.flags);
 		do {
 			int i;
@@ -540,7 +525,7 @@ static int igt_reset_nop_engine(void *arg)
 			}
 		} while (time_before(jiffies, end_time));
 		clear_bit(I915_RESET_ENGINE + id, &gt->reset.flags);
-		engine_heartbeat_enable(engine);
+		st_engine_heartbeat_enable(engine);
 
 		pr_info("%s(%s): %d resets\n", __func__, engine->name, count);
 
@@ -590,7 +575,7 @@ static int __igt_reset_engine(struct intel_gt *gt, bool active)
 		reset_count = i915_reset_count(global);
 		reset_engine_count = i915_reset_engine_count(global, engine);
 
-		engine_heartbeat_disable(engine);
+		st_engine_heartbeat_disable(engine);
 		set_bit(I915_RESET_ENGINE + id, &gt->reset.flags);
 		do {
 			if (active) {
@@ -642,7 +627,7 @@ static int __igt_reset_engine(struct intel_gt *gt, bool active)
 			}
 		} while (time_before(jiffies, end_time));
 		clear_bit(I915_RESET_ENGINE + id, &gt->reset.flags);
-		engine_heartbeat_enable(engine);
+		st_engine_heartbeat_enable(engine);
 
 		if (err)
 			break;
@@ -841,7 +826,7 @@ static int __igt_reset_engines(struct intel_gt *gt,
 
 		yield(); /* start all threads before we begin */
 
-		engine_heartbeat_disable(engine);
+		st_engine_heartbeat_disable(engine);
 		set_bit(I915_RESET_ENGINE + id, &gt->reset.flags);
 		do {
 			struct i915_request *rq = NULL;
@@ -931,7 +916,7 @@ static int __igt_reset_engines(struct intel_gt *gt,
 			}
 		} while (time_before(jiffies, end_time));
 		clear_bit(I915_RESET_ENGINE + id, &gt->reset.flags);
-		engine_heartbeat_enable(engine);
+		st_engine_heartbeat_enable(engine);
 
 		pr_info("i915_reset_engine(%s:%s): %lu resets\n",
 			engine->name, test_name, count);
diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c b/drivers/gpu/drm/i915/gt/selftest_lrc.c
index 58e4e9aafe94..daa4aabab9a7 100644
--- a/drivers/gpu/drm/i915/gt/selftest_lrc.c
+++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c
@@ -9,6 +9,7 @@
 #include "gem/i915_gem_pm.h"
 #include "gt/intel_engine_heartbeat.h"
 #include "gt/intel_reset.h"
+#include "gt/selftest_engine_heartbeat.h"
 
 #include "i915_selftest.h"
 #include "selftests/i915_random.h"
@@ -51,22 +52,6 @@ static struct i915_vma *create_scratch(struct intel_gt *gt)
 	return vma;
 }
 
-static void engine_heartbeat_disable(struct intel_engine_cs *engine)
-{
-	engine->props.heartbeat_interval_ms = 0;
-
-	intel_engine_pm_get(engine);
-	intel_engine_park_heartbeat(engine);
-}
-
-static void engine_heartbeat_enable(struct intel_engine_cs *engine)
-{
-	intel_engine_pm_put(engine);
-
-	engine->props.heartbeat_interval_ms =
-		engine->defaults.heartbeat_interval_ms;
-}
-
 static bool is_active(struct i915_request *rq)
 {
 	if (i915_request_is_active(rq))
@@ -234,7 +219,7 @@ static int live_unlite_restore(struct intel_gt *gt, int prio)
 			err = -EIO;
 			break;
 		}
-		engine_heartbeat_disable(engine);
+		st_engine_heartbeat_disable(engine);
 
 		for (n = 0; n < ARRAY_SIZE(ce); n++) {
 			struct intel_context *tmp;
@@ -342,7 +327,7 @@ err_ce:
 			intel_context_put(ce[n]);
 		}
 
-		engine_heartbeat_enable(engine);
+		st_engine_heartbeat_enable(engine);
 		if (igt_live_test_end(&t))
 			err = -EIO;
 		if (err)
@@ -396,7 +381,7 @@ static int live_unlite_ring(void *arg)
 			err = -EIO;
 			break;
 		}
-		engine_heartbeat_disable(engine);
+		st_engine_heartbeat_disable(engine);
 
 		for (n = 0; n < ARRAY_SIZE(ce); n++) {
 			struct intel_context *tmp;
@@ -502,7 +487,7 @@ err_ce:
 			intel_context_unpin(ce[n]);
 			intel_context_put(ce[n]);
 		}
-		engine_heartbeat_enable(engine);
+		st_engine_heartbeat_enable(engine);
 		if (igt_live_test_end(&t))
 			err = -EIO;
 		if (err)
@@ -621,7 +606,7 @@ static int live_hold_reset(void *arg)
 			break;
 		}
 
-		engine_heartbeat_disable(engine);
+		st_engine_heartbeat_disable(engine);
 
 		rq = igt_spinner_create_request(&spin, ce, MI_ARB_CHECK);
 		if (IS_ERR(rq)) {
@@ -681,7 +666,7 @@ static int live_hold_reset(void *arg)
 		i915_request_put(rq);
 
 out:
-		engine_heartbeat_enable(engine);
+		st_engine_heartbeat_enable(engine);
 		intel_context_put(ce);
 		if (err)
 			break;
@@ -728,7 +713,7 @@ static int live_error_interrupt(void *arg)
 		const struct error_phase *p;
 		int err = 0;
 
-		engine_heartbeat_disable(engine);
+		st_engine_heartbeat_disable(engine);
 
 		for (p = phases; p->error[0] != GOOD; p++) {
 			struct i915_request *client[ARRAY_SIZE(phases->error)];
@@ -827,7 +812,7 @@ out:
 			}
 		}
 
-		engine_heartbeat_enable(engine);
+		st_engine_heartbeat_enable(engine);
 		if (err) {
 			intel_gt_set_wedged(gt);
 			return err;
@@ -1042,9 +1027,9 @@ static int live_timeslice_preempt(void *arg)
 
 		memset(vaddr, 0, PAGE_SIZE);
 
-		engine_heartbeat_disable(engine);
+		st_engine_heartbeat_disable(engine);
 		err = slice_semaphore_queue(engine, vma, 5);
-		engine_heartbeat_enable(engine);
+		st_engine_heartbeat_enable(engine);
 		if (err)
 			goto err_pin;
 
@@ -1166,7 +1151,7 @@ static int live_timeslice_rewind(void *arg)
 		 * Expect execution/evaluation order XZY
 		 */
 
-		engine_heartbeat_disable(engine);
+		st_engine_heartbeat_disable(engine);
 		timeslice = xchg(&engine->props.timeslice_duration_ms, 1);
 
 		slot = memset32(engine->status_page.addr + 1000, 0, 4);
@@ -1261,7 +1246,7 @@ err:
 		wmb();
 
 		engine->props.timeslice_duration_ms = timeslice;
-		engine_heartbeat_enable(engine);
+		st_engine_heartbeat_enable(engine);
 		for (i = 0; i < 3; i++)
 			i915_request_put(rq[i]);
 		if (igt_flush_test(gt->i915))
@@ -1353,7 +1338,7 @@ static int live_timeslice_queue(void *arg)
 		if (!intel_engine_has_preemption(engine))
 			continue;
 
-		engine_heartbeat_disable(engine);
+		st_engine_heartbeat_disable(engine);
 		memset(vaddr, 0, PAGE_SIZE);
 
 		/* ELSP[0]: semaphore wait */
@@ -1414,7 +1399,7 @@ static int live_timeslice_queue(void *arg)
 err_rq:
 		i915_request_put(rq);
 err_heartbeat:
-		engine_heartbeat_enable(engine);
+		st_engine_heartbeat_enable(engine);
 		if (err)
 			break;
 	}
@@ -1460,7 +1445,7 @@ static int live_timeslice_nopreempt(void *arg)
 			break;
 		}
 
-		engine_heartbeat_disable(engine);
+		st_engine_heartbeat_disable(engine);
 		timeslice = xchg(&engine->props.timeslice_duration_ms, 1);
 
 		/* Create an unpreemptible spinner */
@@ -1529,7 +1514,7 @@ out_spin:
 		igt_spinner_end(&spin);
 out_heartbeat:
 		xchg(&engine->props.timeslice_duration_ms, timeslice);
-		engine_heartbeat_enable(engine);
+		st_engine_heartbeat_enable(engine);
 		if (err)
 			break;
 
@@ -2433,7 +2418,7 @@ static int live_suppress_self_preempt(void *arg)
 		if (igt_flush_test(gt->i915))
 			goto err_wedged;
 
-		engine_heartbeat_disable(engine);
+		st_engine_heartbeat_disable(engine);
 		engine->execlists.preempt_hang.count = 0;
 
 		rq_a = spinner_create_request(&a.spin,
@@ -2441,14 +2426,14 @@ static int live_suppress_self_preempt(void *arg)
 					      MI_NOOP);
 		if (IS_ERR(rq_a)) {
 			err = PTR_ERR(rq_a);
-			engine_heartbeat_enable(engine);
+			st_engine_heartbeat_enable(engine);
 			goto err_client_b;
 		}
 
 		i915_request_add(rq_a);
 		if (!igt_wait_for_spinner(&a.spin, rq_a)) {
 			pr_err("First client failed to start\n");
-			engine_heartbeat_enable(engine);
+			st_engine_heartbeat_enable(engine);
 			goto err_wedged;
 		}
 
@@ -2460,7 +2445,7 @@ static int live_suppress_self_preempt(void *arg)
 						      MI_NOOP);
 			if (IS_ERR(rq_b)) {
 				err = PTR_ERR(rq_b);
-				engine_heartbeat_enable(engine);
+				st_engine_heartbeat_enable(engine);
 				goto err_client_b;
 			}
 			i915_request_add(rq_b);
@@ -2471,7 +2456,7 @@ static int live_suppress_self_preempt(void *arg)
 
 			if (!igt_wait_for_spinner(&b.spin, rq_b)) {
 				pr_err("Second client failed to start\n");
-				engine_heartbeat_enable(engine);
+				st_engine_heartbeat_enable(engine);
 				goto err_wedged;
 			}
 
@@ -2485,12 +2470,12 @@ static int live_suppress_self_preempt(void *arg)
 			       engine->name,
 			       engine->execlists.preempt_hang.count,
 			       depth);
-			engine_heartbeat_enable(engine);
+			st_engine_heartbeat_enable(engine);
 			err = -EINVAL;
 			goto err_client_b;
 		}
 
-		engine_heartbeat_enable(engine);
+		st_engine_heartbeat_enable(engine);
 		if (igt_flush_test(gt->i915))
 			goto err_wedged;
 	}
@@ -2902,7 +2887,7 @@ static int live_preempt_ring(void *arg)
 		if (!intel_engine_can_store_dword(engine))
 			continue;
 
-		engine_heartbeat_disable(engine);
+		st_engine_heartbeat_disable(engine);
 
 		for (n = 0; n <= 3; n++) {
 			err = __live_preempt_ring(engine, &spin,
@@ -2911,7 +2896,7 @@ static int live_preempt_ring(void *arg)
 				break;
 		}
 
-		engine_heartbeat_enable(engine);
+		st_engine_heartbeat_enable(engine);
 		if (err)
 			break;
 	}
@@ -4568,7 +4553,7 @@ static int reset_virtual_engine(struct intel_gt *gt,
 	}
 
 	for (n = 0; n < nsibling; n++)
-		engine_heartbeat_disable(siblings[n]);
+		st_engine_heartbeat_disable(siblings[n]);
 
 	rq = igt_spinner_create_request(&spin, ve, MI_ARB_CHECK);
 	if (IS_ERR(rq)) {
@@ -4639,7 +4624,7 @@ out_rq:
 	i915_request_put(rq);
 out_heartbeat:
 	for (n = 0; n < nsibling; n++)
-		engine_heartbeat_enable(siblings[n]);
+		st_engine_heartbeat_enable(siblings[n]);
 
 	intel_context_put(ve);
 out_spin:
@@ -5314,7 +5299,7 @@ static int live_lrc_gpr(void *arg)
 		return PTR_ERR(scratch);
 
 	for_each_engine(engine, gt, id) {
-		engine_heartbeat_disable(engine);
+		st_engine_heartbeat_disable(engine);
 
 		err = __live_lrc_gpr(engine, scratch, false);
 		if (err)
@@ -5325,7 +5310,7 @@ static int live_lrc_gpr(void *arg)
 			goto err;
 
 err:
-		engine_heartbeat_enable(engine);
+		st_engine_heartbeat_enable(engine);
 		if (igt_flush_test(gt->i915))
 			err = -EIO;
 		if (err)
@@ -5474,7 +5459,7 @@ static int live_lrc_timestamp(void *arg)
 	for_each_engine(data.engine, gt, id) {
 		int i, err = 0;
 
-		engine_heartbeat_disable(data.engine);
+		st_engine_heartbeat_disable(data.engine);
 
 		for (i = 0; i < ARRAY_SIZE(data.ce); i++) {
 			struct intel_context *tmp;
@@ -5507,7 +5492,7 @@ static int live_lrc_timestamp(void *arg)
 		}
 
 err:
-		engine_heartbeat_enable(data.engine);
+		st_engine_heartbeat_enable(data.engine);
 		for (i = 0; i < ARRAY_SIZE(data.ce); i++) {
 			if (!data.ce[i])
 				break;
diff --git a/drivers/gpu/drm/i915/gt/selftest_rps.c b/drivers/gpu/drm/i915/gt/selftest_rps.c
index 5049c3dd08a6..bb753f0c12eb 100644
--- a/drivers/gpu/drm/i915/gt/selftest_rps.c
+++ b/drivers/gpu/drm/i915/gt/selftest_rps.c
@@ -12,6 +12,7 @@
 #include "intel_gt_clock_utils.h"
 #include "intel_gt_pm.h"
 #include "intel_rc6.h"
+#include "selftest_engine_heartbeat.h"
 #include "selftest_rps.h"
 #include "selftests/igt_flush_test.h"
 #include "selftests/igt_spinner.h"
@@ -20,22 +21,6 @@
 /* Try to isolate the impact of cstates from determing frequency response */
 #define CPU_LATENCY 0 /* -1 to disable pm_qos, 0 to disable cstates */
 
-static void engine_heartbeat_disable(struct intel_engine_cs *engine)
-{
-	engine->props.heartbeat_interval_ms = 0;
-
-	intel_engine_pm_get(engine);
-	intel_engine_park_heartbeat(engine);
-}
-
-static void engine_heartbeat_enable(struct intel_engine_cs *engine)
-{
-	intel_engine_pm_put(engine);
-
-	engine->props.heartbeat_interval_ms =
-		engine->defaults.heartbeat_interval_ms;
-}
-
 static void dummy_rps_work(struct work_struct *wrk)
 {
 }
@@ -249,13 +234,13 @@ int live_rps_clock_interval(void *arg)
 		if (!intel_engine_can_store_dword(engine))
 			continue;
 
-		engine_heartbeat_disable(engine);
+		st_engine_heartbeat_disable(engine);
 
 		rq = igt_spinner_create_request(&spin,
 						engine->kernel_context,
 						MI_NOOP);
 		if (IS_ERR(rq)) {
-			engine_heartbeat_enable(engine);
+			st_engine_heartbeat_enable(engine);
 			err = PTR_ERR(rq);
 			break;
 		}
@@ -266,7 +251,7 @@ int live_rps_clock_interval(void *arg)
 			pr_err("%s: RPS spinner did not start\n",
 			       engine->name);
 			igt_spinner_end(&spin);
-			engine_heartbeat_enable(engine);
+			st_engine_heartbeat_enable(engine);
 			intel_gt_set_wedged(engine->gt);
 			err = -EIO;
 			break;
@@ -322,7 +307,7 @@ int live_rps_clock_interval(void *arg)
 		intel_uncore_forcewake_put(gt->uncore, FORCEWAKE_ALL);
 
 		igt_spinner_end(&spin);
-		engine_heartbeat_enable(engine);
+		st_engine_heartbeat_enable(engine);
 
 		if (err == 0) {
 			u64 time = intel_gt_pm_interval_to_ns(gt, cycles);
@@ -408,7 +393,7 @@ int live_rps_control(void *arg)
 		if (!intel_engine_can_store_dword(engine))
 			continue;
 
-		engine_heartbeat_disable(engine);
+		st_engine_heartbeat_disable(engine);
 
 		rq = igt_spinner_create_request(&spin,
 						engine->kernel_context,
@@ -424,7 +409,7 @@ int live_rps_control(void *arg)
 			pr_err("%s: RPS spinner did not start\n",
 			       engine->name);
 			igt_spinner_end(&spin);
-			engine_heartbeat_enable(engine);
+			st_engine_heartbeat_enable(engine);
 			intel_gt_set_wedged(engine->gt);
 			err = -EIO;
 			break;
@@ -434,7 +419,7 @@ int live_rps_control(void *arg)
 			pr_err("%s: could not set minimum frequency [%x], only %x!\n",
 			       engine->name, rps->min_freq, read_cagf(rps));
 			igt_spinner_end(&spin);
-			engine_heartbeat_enable(engine);
+			st_engine_heartbeat_enable(engine);
 			show_pstate_limits(rps);
 			err = -EINVAL;
 			break;
@@ -451,7 +436,7 @@ int live_rps_control(void *arg)
 			pr_err("%s: could not restore minimum frequency [%x], only %x!\n",
 			       engine->name, rps->min_freq, read_cagf(rps));
 			igt_spinner_end(&spin);
-			engine_heartbeat_enable(engine);
+			st_engine_heartbeat_enable(engine);
 			show_pstate_limits(rps);
 			err = -EINVAL;
 			break;
@@ -466,7 +451,7 @@ int live_rps_control(void *arg)
 		min_dt = ktime_sub(ktime_get(), min_dt);
 
 		igt_spinner_end(&spin);
-		engine_heartbeat_enable(engine);
+		st_engine_heartbeat_enable(engine);
 
 		pr_info("%s: range:[%x:%uMHz, %x:%uMHz] limit:[%x:%uMHz], %x:%x response %lluns:%lluns\n",
 			engine->name,
@@ -637,14 +622,14 @@ int live_rps_frequency_cs(void *arg)
 			int freq;
 		} min, max;
 
-		engine_heartbeat_disable(engine);
+		st_engine_heartbeat_disable(engine);
 
 		vma = create_spin_counter(engine,
 					  engine->kernel_context->vm, false,
 					  &cancel, &cntr);
 		if (IS_ERR(vma)) {
 			err = PTR_ERR(vma);
-			engine_heartbeat_enable(engine);
+			st_engine_heartbeat_enable(engine);
 			break;
 		}
 
@@ -725,7 +710,7 @@ err_vma:
 		i915_vma_unpin(vma);
 		i915_vma_put(vma);
 
-		engine_heartbeat_enable(engine);
+		st_engine_heartbeat_enable(engine);
 		if (igt_flush_test(gt->i915))
 			err = -EIO;
 		if (err)
@@ -779,14 +764,14 @@ int live_rps_frequency_srm(void *arg)
 			int freq;
 		} min, max;
 
-		engine_heartbeat_disable(engine);
+		st_engine_heartbeat_disable(engine);
 
 		vma = create_spin_counter(engine,
 					  engine->kernel_context->vm, true,
 					  &cancel, &cntr);
 		if (IS_ERR(vma)) {
 			err = PTR_ERR(vma);
-			engine_heartbeat_enable(engine);
+			st_engine_heartbeat_enable(engine);
 			break;
 		}
 
@@ -866,7 +851,7 @@ err_vma:
 		i915_vma_unpin(vma);
 		i915_vma_put(vma);
 
-		engine_heartbeat_enable(engine);
+		st_engine_heartbeat_enable(engine);
 		if (igt_flush_test(gt->i915))
 			err = -EIO;
 		if (err)
@@ -1061,11 +1046,11 @@ int live_rps_interrupt(void *arg)
 			intel_gt_pm_wait_for_idle(engine->gt);
 			GEM_BUG_ON(intel_rps_is_active(rps));
 
-			engine_heartbeat_disable(engine);
+			st_engine_heartbeat_disable(engine);
 
 			err = __rps_up_interrupt(rps, engine, &spin);
 
-			engine_heartbeat_enable(engine);
+			st_engine_heartbeat_enable(engine);
 			if (err)
 				goto out;
 
@@ -1074,13 +1059,13 @@ int live_rps_interrupt(void *arg)
 
 		/* Keep the engine awake but idle and check for DOWN */
 		if (pm_events & GEN6_PM_RP_DOWN_THRESHOLD) {
-			engine_heartbeat_disable(engine);
+			st_engine_heartbeat_disable(engine);
 			intel_rc6_disable(&gt->rc6);
 
 			err = __rps_down_interrupt(rps, engine);
 
 			intel_rc6_enable(&gt->rc6);
-			engine_heartbeat_enable(engine);
+			st_engine_heartbeat_enable(engine);
 			if (err)
 				goto out;
 		}
@@ -1165,13 +1150,13 @@ int live_rps_power(void *arg)
 		if (!intel_engine_can_store_dword(engine))
 			continue;
 
-		engine_heartbeat_disable(engine);
+		st_engine_heartbeat_disable(engine);
 
 		rq = igt_spinner_create_request(&spin,
 						engine->kernel_context,
 						MI_NOOP);
 		if (IS_ERR(rq)) {
-			engine_heartbeat_enable(engine);
+			st_engine_heartbeat_enable(engine);
 			err = PTR_ERR(rq);
 			break;
 		}
@@ -1182,7 +1167,7 @@ int live_rps_power(void *arg)
 			pr_err("%s: RPS spinner did not start\n",
 			       engine->name);
 			igt_spinner_end(&spin);
-			engine_heartbeat_enable(engine);
+			st_engine_heartbeat_enable(engine);
 			intel_gt_set_wedged(engine->gt);
 			err = -EIO;
 			break;
@@ -1195,7 +1180,7 @@ int live_rps_power(void *arg)
 		min.power = measure_power_at(rps, &min.freq);
 
 		igt_spinner_end(&spin);
-		engine_heartbeat_enable(engine);
+		st_engine_heartbeat_enable(engine);
 
 		pr_info("%s: min:%llumW @ %uMHz, max:%llumW @ %uMHz\n",
 			engine->name,
@@ -1252,6 +1237,11 @@ int live_rps_dynamic(void *arg)
 	if (igt_spinner_init(&spin, gt))
 		return -ENOMEM;
 
+	if (intel_rps_has_interrupts(rps))
+		pr_info("RPS has interrupt support\n");
+	if (intel_rps_uses_timer(rps))
+		pr_info("RPS has timer support\n");
+
 	for_each_engine(engine, gt, id) {
 		struct i915_request *rq;
 		struct {
diff --git a/drivers/gpu/drm/i915/gt/selftest_timeline.c b/drivers/gpu/drm/i915/gt/selftest_timeline.c
index b2aad7ef046a..fcdee951579b 100644
--- a/drivers/gpu/drm/i915/gt/selftest_timeline.c
+++ b/drivers/gpu/drm/i915/gt/selftest_timeline.c
@@ -12,6 +12,7 @@
 #include "intel_gt.h"
 #include "intel_gt_requests.h"
 #include "intel_ring.h"
+#include "selftest_engine_heartbeat.h"
 
 #include "../selftests/i915_random.h"
 #include "../i915_selftest.h"
@@ -751,22 +752,6 @@ out_free:
 	return err;
 }
 
-static void engine_heartbeat_disable(struct intel_engine_cs *engine)
-{
-	engine->props.heartbeat_interval_ms = 0;
-
-	intel_engine_pm_get(engine);
-	intel_engine_park_heartbeat(engine);
-}
-
-static void engine_heartbeat_enable(struct intel_engine_cs *engine)
-{
-	intel_engine_pm_put(engine);
-
-	engine->props.heartbeat_interval_ms =
-		engine->defaults.heartbeat_interval_ms;
-}
-
 static int live_hwsp_rollover_kernel(void *arg)
 {
 	struct intel_gt *gt = arg;
@@ -785,7 +770,7 @@ static int live_hwsp_rollover_kernel(void *arg)
 		struct i915_request *rq[3] = {};
 		int i;
 
-		engine_heartbeat_disable(engine);
+		st_engine_heartbeat_disable(engine);
 		if (intel_gt_wait_for_idle(gt, HZ / 2)) {
 			err = -EIO;
 			goto out;
@@ -836,7 +821,7 @@ static int live_hwsp_rollover_kernel(void *arg)
 out:
 		for (i = 0; i < ARRAY_SIZE(rq); i++)
 			i915_request_put(rq[i]);
-		engine_heartbeat_enable(engine);
+		st_engine_heartbeat_enable(engine);
 		if (err)
 			break;
 	}
diff --git a/drivers/gpu/drm/i915/selftests/i915_request.c b/drivers/gpu/drm/i915/selftests/i915_request.c
index 92c628f18c60..06d18aae070b 100644
--- a/drivers/gpu/drm/i915/selftests/i915_request.c
+++ b/drivers/gpu/drm/i915/selftests/i915_request.c
@@ -34,6 +34,7 @@
 #include "gt/intel_engine_user.h"
 #include "gt/intel_gt.h"
 #include "gt/intel_gt_requests.h"
+#include "gt/selftest_engine_heartbeat.h"
 
 #include "i915_random.h"
 #include "i915_selftest.h"
@@ -2270,22 +2271,6 @@ static void rps_unpin(struct intel_gt *gt)
 	atomic_dec(&gt->rps.num_waiters);
 }
 
-static void engine_heartbeat_disable(struct intel_engine_cs *engine)
-{
-	engine->props.heartbeat_interval_ms = 0;
-
-	intel_engine_pm_get(engine);
-	intel_engine_park_heartbeat(engine);
-}
-
-static void engine_heartbeat_enable(struct intel_engine_cs *engine)
-{
-	intel_engine_pm_put(engine);
-
-	engine->props.heartbeat_interval_ms =
-		engine->defaults.heartbeat_interval_ms;
-}
-
 static int perf_request_latency(void *arg)
 {
 	struct drm_i915_private *i915 = arg;
@@ -2311,7 +2296,7 @@ static int perf_request_latency(void *arg)
 			goto out;
 		}
 
-		engine_heartbeat_disable(engine);
+		st_engine_heartbeat_disable(engine);
 		rps_pin(engine->gt);
 
 		if (err == 0)
@@ -2330,7 +2315,7 @@ static int perf_request_latency(void *arg)
 			err = measure_completion(ce);
 
 		rps_unpin(engine->gt);
-		engine_heartbeat_enable(engine);
+		st_engine_heartbeat_enable(engine);
 
 		intel_context_unpin(ce);
 		intel_context_put(ce);