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drm/i915: Track gt pm wakerefs

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Track every intel_gt_pm_get() until its corresponding release in
intel_gt_pm_put() by returning a cookie to the caller for acquire that
must be passed by on released. When there is an imbalance, we can see who
either tried to free a stale wakeref, or who forgot to free theirs.

v2: track recently added calls in gen8_ggtt_bind_get_ce and
    destroyed_worker_func

Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231030-ref_tracker_i915-v1-2-006fe6b96421@intel.com
This commit is contained in:
Andrzej Hajda
2023-10-30 18:40:13 +01:00
parent b49e894c3f
commit 5e4e06e408
24 changed files with 197 additions and 90 deletions
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7
drivers/gpu/drm/i915/intel_wakeref.c
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@@ -99,7 +99,8 @@ static void __intel_wakeref_put_work(struct work_struct *wrk)
void __intel_wakeref_init(struct intel_wakeref *wf,
struct drm_i915_private *i915,
const struct intel_wakeref_ops *ops,
struct intel_wakeref_lockclass *key)
struct intel_wakeref_lockclass *key,
const char *name)
{
wf->i915 = i915;
wf->ops = ops;
@@ -111,6 +112,10 @@ void __intel_wakeref_init(struct intel_wakeref *wf,
INIT_DELAYED_WORK(&wf->work, __intel_wakeref_put_work);
lockdep_init_map(&wf->work.work.lockdep_map,
"wakeref.work", &key->work, 0);
#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_WAKEREF)
ref_tracker_dir_init(&wf->debug, INTEL_REFTRACK_DEAD_COUNT, name);
#endif
}
int intel_wakeref_wait_for_idle(struct intel_wakeref *wf)