drm/i915/selftests: Refactor common live_test framework

Before adding yet another copy of struct live_test and its handler,
refactor the existing code into a common framework for live selftests.
For many live selftests, we want to know if the GPU hung or otherwise
misbehaved during the execution of the test (beyond any infraction in
the behaviour under test), live_test provides this by comparing the
GPU state before and after, alerting if it unexpectedly changed (e.g.
the reset counter changed). It also ensures that the GPU is idle before
and after the test, so that residual code running on the GPU is flushed
before testing.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190121222117.23305-5-chris@chris-wilson.co.uk

1 files changed, 13 insertions, 73 deletions

diff --git a/drivers/gpu/drm/i915/selftests/i915_request.c b/drivers/gpu/drm/i915/selftests/i915_request.c
index 2e14d6d3bad7..4d4b86b5fa11 100644
--- a/drivers/gpu/drm/i915/selftests/i915_request.c
+++ b/drivers/gpu/drm/i915/selftests/i915_request.c
@@ -25,6 +25,7 @@
 #include <linux/prime_numbers.h>
 
 #include "../i915_selftest.h"
+#include "igt_live_test.h"
 
 #include "mock_context.h"
 #include "mock_gem_device.h"
@@ -270,73 +271,12 @@ int i915_request_mock_selftests(void)
 	return err;
 }
 
-struct live_test {
-	struct drm_i915_private *i915;
-	const char *func;
-	const char *name;
-
-	unsigned int reset_count;
-};
-
-static int begin_live_test(struct live_test *t,
-			   struct drm_i915_private *i915,
-			   const char *func,
-			   const char *name)
-{
-	int err;
-
-	t->i915 = i915;
-	t->func = func;
-	t->name = name;
-
-	err = i915_gem_wait_for_idle(i915,
-				     I915_WAIT_LOCKED,
-				     MAX_SCHEDULE_TIMEOUT);
-	if (err) {
-		pr_err("%s(%s): failed to idle before, with err=%d!",
-		       func, name, err);
-		return err;
-	}
-
-	i915->gpu_error.missed_irq_rings = 0;
-	t->reset_count = i915_reset_count(&i915->gpu_error);
-
-	return 0;
-}
-
-static int end_live_test(struct live_test *t)
-{
-	struct drm_i915_private *i915 = t->i915;
-
-	i915_retire_requests(i915);
-
-	if (wait_for(intel_engines_are_idle(i915), 10)) {
-		pr_err("%s(%s): GPU not idle\n", t->func, t->name);
-		return -EIO;
-	}
-
-	if (t->reset_count != i915_reset_count(&i915->gpu_error)) {
-		pr_err("%s(%s): GPU was reset %d times!\n",
-		       t->func, t->name,
-		       i915_reset_count(&i915->gpu_error) - t->reset_count);
-		return -EIO;
-	}
-
-	if (i915->gpu_error.missed_irq_rings) {
-		pr_err("%s(%s): Missed interrupts on engines %lx\n",
-		       t->func, t->name, i915->gpu_error.missed_irq_rings);
-		return -EIO;
-	}
-
-	return 0;
-}
-
 static int live_nop_request(void *arg)
 {
 	struct drm_i915_private *i915 = arg;
 	struct intel_engine_cs *engine;
 	intel_wakeref_t wakeref;
-	struct live_test t;
+	struct igt_live_test t;
 	unsigned int id;
 	int err = -ENODEV;
 
@@ -354,7 +294,7 @@ static int live_nop_request(void *arg)
 		IGT_TIMEOUT(end_time);
 		ktime_t times[2] = {};
 
-		err = begin_live_test(&t, i915, __func__, engine->name);
+		err = igt_live_test_begin(&t, i915, __func__, engine->name);
 		if (err)
 			goto out_unlock;
 
@@ -396,7 +336,7 @@ static int live_nop_request(void *arg)
 				break;
 		}
 
-		err = end_live_test(&t);
+		err = igt_live_test_end(&t);
 		if (err)
 			goto out_unlock;
 
@@ -483,8 +423,8 @@ static int live_empty_request(void *arg)
 	struct drm_i915_private *i915 = arg;
 	struct intel_engine_cs *engine;
 	intel_wakeref_t wakeref;
+	struct igt_live_test t;
 	struct i915_vma *batch;
-	struct live_test t;
 	unsigned int id;
 	int err = 0;
 
@@ -508,7 +448,7 @@ static int live_empty_request(void *arg)
 		unsigned long n, prime;
 		ktime_t times[2] = {};
 
-		err = begin_live_test(&t, i915, __func__, engine->name);
+		err = igt_live_test_begin(&t, i915, __func__, engine->name);
 		if (err)
 			goto out_batch;
 
@@ -544,7 +484,7 @@ static int live_empty_request(void *arg)
 				break;
 		}
 
-		err = end_live_test(&t);
+		err = igt_live_test_end(&t);
 		if (err)
 			goto out_batch;
 
@@ -643,8 +583,8 @@ static int live_all_engines(void *arg)
 	struct intel_engine_cs *engine;
 	struct i915_request *request[I915_NUM_ENGINES];
 	intel_wakeref_t wakeref;
+	struct igt_live_test t;
 	struct i915_vma *batch;
-	struct live_test t;
 	unsigned int id;
 	int err;
 
@@ -656,7 +596,7 @@ static int live_all_engines(void *arg)
 	mutex_lock(&i915->drm.struct_mutex);
 	wakeref = intel_runtime_pm_get(i915);
 
-	err = begin_live_test(&t, i915, __func__, "");
+	err = igt_live_test_begin(&t, i915, __func__, "");
 	if (err)
 		goto out_unlock;
 
@@ -728,7 +668,7 @@ static int live_all_engines(void *arg)
 		request[id] = NULL;
 	}
 
-	err = end_live_test(&t);
+	err = igt_live_test_end(&t);
 
 out_request:
 	for_each_engine(engine, i915, id)
@@ -749,7 +689,7 @@ static int live_sequential_engines(void *arg)
 	struct i915_request *prev = NULL;
 	struct intel_engine_cs *engine;
 	intel_wakeref_t wakeref;
-	struct live_test t;
+	struct igt_live_test t;
 	unsigned int id;
 	int err;
 
@@ -762,7 +702,7 @@ static int live_sequential_engines(void *arg)
 	mutex_lock(&i915->drm.struct_mutex);
 	wakeref = intel_runtime_pm_get(i915);
 
-	err = begin_live_test(&t, i915, __func__, "");
+	err = igt_live_test_begin(&t, i915, __func__, "");
 	if (err)
 		goto out_unlock;
 
@@ -845,7 +785,7 @@ static int live_sequential_engines(void *arg)
 		GEM_BUG_ON(!i915_request_completed(request[id]));
 	}
 
-	err = end_live_test(&t);
+	err = igt_live_test_end(&t);
 
 out_request:
 	for_each_engine(engine, i915, id) {