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drm/i915/selftests: Check for hangs mid context execution tests

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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.

v2: Check per-engine resets as well

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181012122404.10874-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2018-10-12 13:24:04 +01:00
parent 9213e4f544
commit 8dd0f8d37e
1 changed files with 41 additions and 10 deletions
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51
drivers/gpu/drm/i915/selftests/i915_gem_context.c
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@ -39,7 +39,8 @@ struct live_test {
const char *func;
const char *name;
unsigned int reset_count;
unsigned int reset_global;
unsigned int reset_engine[I915_NUM_ENGINES];
};
static int begin_live_test(struct live_test *t,
@ -47,6 +48,8 @@ static int begin_live_test(struct live_test *t,
const char *func,
const char *name)
{
struct intel_engine_cs *engine;
enum intel_engine_id id;
int err;
t->i915 = i915;
@ -63,7 +66,11 @@ static int begin_live_test(struct live_test *t,
}
i915->gpu_error.missed_irq_rings = 0;
t->reset_count = i915_reset_count(&i915->gpu_error);
t->reset_global = i915_reset_count(&i915->gpu_error);
for_each_engine(engine, i915, id)
t->reset_engine[id] =
i915_reset_engine_count(&i915->gpu_error, engine);
return 0;
}
@ -71,14 +78,28 @@ static int begin_live_test(struct live_test *t,
static int end_live_test(struct live_test *t)
{
struct drm_i915_private *i915 = t->i915;
struct intel_engine_cs *engine;
enum intel_engine_id id;
if (igt_flush_test(i915, I915_WAIT_LOCKED))
return -EIO;
if (t->reset_count != i915_reset_count(&i915->gpu_error)) {
if (t->reset_global != 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);
i915_reset_count(&i915->gpu_error) - t->reset_global);
return -EIO;
}
for_each_engine(engine, i915, id) {
if (t->reset_engine[id] ==
i915_reset_engine_count(&i915->gpu_error, engine))
continue;
pr_err("%s(%s): engine '%s' was reset %d times!\n",
t->func, t->name, engine->name,
i915_reset_engine_count(&i915->gpu_error, engine) -
t->reset_engine[id]);
return -EIO;
}
@ -531,10 +552,11 @@ 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 +574,10 @@ 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 +642,7 @@ 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 +654,14 @@ 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 +676,10 @@ 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 +752,7 @@ 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);