[Intel-gfx] [PATCH] drm/i915/selftests: Check for hangs mid context execution tests

[Chris Wilson]

Use the live_test struct to record the reset count before and compare it
at the end of the test to assert that no mystery hang occurred during the
test.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 .../gpu/drm/i915/selftests/i915_gem_context.c | 22 ++++++++++++++-----
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/selftests/i915_gem_context.c
index 913c0f83f86a..ea165a644d79 100644
--- a/drivers/gpu/drm/i915/selftests/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_context.c
@@ -531,10 +531,11 @@ static int igt_ctx_exec(void *arg)
 {
 	struct drm_i915_private *i915 = arg;
 	struct drm_i915_gem_object *obj = NULL;
+	unsigned long ncontexts, ndwords, dw;
 	struct drm_file *file;
 	IGT_TIMEOUT(end_time);
 	LIST_HEAD(objects);
-	unsigned long ncontexts, ndwords, dw;
+	struct live_test t;
 	int err = -ENODEV;
 
 	/*
@@ -552,6 +553,10 @@ static int igt_ctx_exec(void *arg)
 
 	mutex_lock(&i915->drm.struct_mutex);
 
+	err = begin_live_test(&t, i915, __func__, "");
+	if (err)
+		goto out_unlock;
+
 	ncontexts = 0;
 	ndwords = 0;
 	dw = 0;
@@ -616,7 +621,7 @@ static int igt_ctx_exec(void *arg)
 	}
 
 out_unlock:
-	if (igt_flush_test(i915, I915_WAIT_LOCKED))
+	if (end_live_test(&t))
 		err = -EIO;
 	mutex_unlock(&i915->drm.struct_mutex);
 
@@ -628,13 +633,14 @@ static int igt_ctx_readonly(void *arg)
 {
 	struct drm_i915_private *i915 = arg;
 	struct drm_i915_gem_object *obj = NULL;
+	struct i915_gem_context *ctx;
+	struct i915_hw_ppgtt *ppgtt;
+	unsigned long ndwords, dw;
 	struct drm_file *file;
 	I915_RND_STATE(prng);
 	IGT_TIMEOUT(end_time);
 	LIST_HEAD(objects);
-	struct i915_gem_context *ctx;
-	struct i915_hw_ppgtt *ppgtt;
-	unsigned long ndwords, dw;
+	struct live_test t;
 	int err = -ENODEV;
 
 	/*
@@ -649,6 +655,10 @@ static int igt_ctx_readonly(void *arg)
 
 	mutex_lock(&i915->drm.struct_mutex);
 
+	err = begin_live_test(&t, i915, __func__, "");
+	if (err)
+		goto out_unlock;
+
 	ctx = i915_gem_create_context(i915, file->driver_priv);
 	if (IS_ERR(ctx)) {
 		err = PTR_ERR(ctx);
@@ -721,7 +731,7 @@ static int igt_ctx_readonly(void *arg)
 	}
 
 out_unlock:
-	if (igt_flush_test(i915, I915_WAIT_LOCKED))
+	if (end_live_test(&t))
 		err = -EIO;
 	mutex_unlock(&i915->drm.struct_mutex);
 
-- 
2.19.1