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drm/i915/selftests: Pretty print the i915_active

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If the idle_pulse fails to flush the i915_active, dump the tree to see
if that has any clues.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191031101116.19894-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-10-31 10:11:16 +00:00
parent 1db257c55f
commit 164a412886
3 changed files with 51 additions and 0 deletions
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4
drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
View File

@ -102,8 +102,12 @@ static int __live_idle_pulse(struct intel_engine_cs *engine,
pulse_unlock_wait(p); /* synchronize with the retirement callback */
if (!i915_active_is_idle(&p->active)) {
struct drm_printer m = drm_err_printer("pulse");
pr_err("%s: heartbeat pulse did not flush idle tasks\n",
engine->name);
i915_active_print(&p->active, &m);
err = -EINVAL;
goto out;
}

2
drivers/gpu/drm/i915/i915_active.h
View File

@ -214,4 +214,6 @@ int i915_active_acquire_preallocate_barrier(struct i915_active *ref,
void i915_active_acquire_barrier(struct i915_active *ref);
void i915_request_add_active_barriers(struct i915_request *rq);
void i915_active_print(struct i915_active *ref, struct drm_printer *m);
#endif /* _I915_ACTIVE_H_ */

45
drivers/gpu/drm/i915/selftests/i915_active.c
View File

@ -205,3 +205,48 @@ int i915_active_live_selftests(struct drm_i915_private *i915)
return i915_subtests(tests, i915);
}
static struct intel_engine_cs *node_to_barrier(struct active_node *it)
{
struct intel_engine_cs *engine;
if (!is_barrier(&it->base))
return NULL;
engine = __barrier_to_engine(it);
smp_rmb(); /* serialise with add_active_barriers */
if (!is_barrier(&it->base))
return NULL;
return engine;
}
void i915_active_print(struct i915_active *ref, struct drm_printer *m)
{
drm_printf(m, "active %pS:%pS\n", ref->active, ref->retire);
drm_printf(m, "\tcount: %d\n", atomic_read(&ref->count));
drm_printf(m, "\tpreallocated barriers? %s\n",
yesno(!llist_empty(&ref->preallocated_barriers)));
if (i915_active_acquire_if_busy(ref)) {
struct active_node *it, *n;
rbtree_postorder_for_each_entry_safe(it, n, &ref->tree, node) {
struct intel_engine_cs *engine;
engine = node_to_barrier(it);
if (engine) {
drm_printf(m, "\tbarrier: %s\n", engine->name);
continue;
}
if (i915_active_fence_isset(&it->base)) {
drm_printf(m,
"\ttimeline: %llx\n", it->timeline);
continue;
}
}
i915_active_release(ref);
}
}