drm/i915: use pointer to i915 instead of rpm in wakeref

Currently a pointer to an intel_runtime_pm structure is stored in the
wake reference structures so the runtime data can be accessed.  We can
save the entire device information (drm_i915_private) instead, since
we'll need to reference the new workqueue we'll add in subsequent
patches.

Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ec0eb5149120d04f3d9870d7671ef10103e6fc29.1686231190.git.jani.nikula@intel.com

Author: lucacoelho

drivers/gpu/drm/i915/gt/intel_engine_pm.c

@@ -296,9 +296,7 @@ static const struct intel_wakeref_ops wf_ops = {
 
 void intel_engine_init__pm(struct intel_engine_cs *engine)
 {
-	struct intel_runtime_pm *rpm = engine->uncore->rpm;
-
-	intel_wakeref_init(&engine->wakeref, rpm, &wf_ops);
+	intel_wakeref_init(&engine->wakeref, engine->i915, &wf_ops);
 	intel_engine_init_heartbeat(engine);
 
 	intel_gsc_idle_msg_enable(engine);

drivers/gpu/drm/i915/gt/intel_gt_pm.c

@@ -137,7 +137,7 @@ void intel_gt_pm_init_early(struct intel_gt *gt)
 	 * runtime_pm is per-device rather than per-tile, so this is still the
 	 * correct structure.
 	 */
-	intel_wakeref_init(&gt->wakeref, &gt->i915->runtime_pm, &wf_ops);
+	intel_wakeref_init(&gt->wakeref, gt->i915, &wf_ops);
 	seqcount_mutex_init(&gt->stats.lock, &gt->wakeref.mutex);
 }
 

drivers/gpu/drm/i915/intel_runtime_pm.c

@@ -658,5 +658,5 @@ void intel_runtime_pm_init_early(struct intel_runtime_pm *rpm)
 	init_intel_runtime_pm_wakeref(rpm);
 	INIT_LIST_HEAD(&rpm->lmem_userfault_list);
 	spin_lock_init(&rpm->lmem_userfault_lock);
-	intel_wakeref_auto_init(&rpm->userfault_wakeref, rpm);
+	intel_wakeref_auto_init(&rpm->userfault_wakeref, i915);
 }

drivers/gpu/drm/i915/intel_wakeref.c

@@ -8,17 +8,18 @@
 
 #include "intel_runtime_pm.h"
 #include "intel_wakeref.h"
+#include "i915_drv.h"
 
 static void rpm_get(struct intel_wakeref *wf)
 {
-	wf->wakeref = intel_runtime_pm_get(wf->rpm);
+	wf->wakeref = intel_runtime_pm_get(&wf->i915->runtime_pm);
 }
 
 static void rpm_put(struct intel_wakeref *wf)
 {
 	intel_wakeref_t wakeref = fetch_and_zero(&wf->wakeref);
 
-	intel_runtime_pm_put(wf->rpm, wakeref);
+	intel_runtime_pm_put(&wf->i915->runtime_pm, wakeref);
 	INTEL_WAKEREF_BUG_ON(!wakeref);
 }
 
@@ -94,11 +95,11 @@ static void __intel_wakeref_put_work(struct work_struct *wrk)
 }
 
 void __intel_wakeref_init(struct intel_wakeref *wf,
-			  struct intel_runtime_pm *rpm,
+			  struct drm_i915_private *i915,
 			  const struct intel_wakeref_ops *ops,
 			  struct intel_wakeref_lockclass *key)
 {
-	wf->rpm = rpm;
+	wf->i915 = i915;
 	wf->ops = ops;
 
 	__mutex_init(&wf->mutex, "wakeref.mutex", &key->mutex);
@@ -137,17 +138,17 @@ static void wakeref_auto_timeout(struct timer_list *t)
 	wakeref = fetch_and_zero(&wf->wakeref);
 	spin_unlock_irqrestore(&wf->lock, flags);
 
-	intel_runtime_pm_put(wf->rpm, wakeref);
+	intel_runtime_pm_put(&wf->i915->runtime_pm, wakeref);
 }
 
 void intel_wakeref_auto_init(struct intel_wakeref_auto *wf,
-			     struct intel_runtime_pm *rpm)
+			     struct drm_i915_private *i915)
 {
 	spin_lock_init(&wf->lock);
 	timer_setup(&wf->timer, wakeref_auto_timeout, 0);
 	refcount_set(&wf->count, 0);
 	wf->wakeref = 0;
-	wf->rpm = rpm;
+	wf->i915 = i915;
 }
 
 void intel_wakeref_auto(struct intel_wakeref_auto *wf, unsigned long timeout)
@@ -161,13 +162,14 @@ void intel_wakeref_auto(struct intel_wakeref_auto *wf, unsigned long timeout)
 	}
 
 	/* Our mission is that we only extend an already active wakeref */
-	assert_rpm_wakelock_held(wf->rpm);
+	assert_rpm_wakelock_held(&wf->i915->runtime_pm);
 
 	if (!refcount_inc_not_zero(&wf->count)) {
 		spin_lock_irqsave(&wf->lock, flags);
 		if (!refcount_inc_not_zero(&wf->count)) {
 			INTEL_WAKEREF_BUG_ON(wf->wakeref);
-			wf->wakeref = intel_runtime_pm_get_if_in_use(wf->rpm);
+			wf->wakeref =
+				intel_runtime_pm_get_if_in_use(&wf->i915->runtime_pm);
 			refcount_set(&wf->count, 1);
 		}
 		spin_unlock_irqrestore(&wf->lock, flags);

drivers/gpu/drm/i915/intel_wakeref.h

@@ -39,7 +39,7 @@ struct intel_wakeref {
 
 	intel_wakeref_t wakeref;
 
-	struct intel_runtime_pm *rpm;
+	struct drm_i915_private *i915;
 	const struct intel_wakeref_ops *ops;
 
 	struct delayed_work work;
@@ -51,13 +51,13 @@ struct intel_wakeref_lockclass {
 };
 
 void __intel_wakeref_init(struct intel_wakeref *wf,
-			  struct intel_runtime_pm *rpm,
+			  struct drm_i915_private *i915,
 			  const struct intel_wakeref_ops *ops,
 			  struct intel_wakeref_lockclass *key);
-#define intel_wakeref_init(wf, rpm, ops) do {				\
+#define intel_wakeref_init(wf, i915, ops) do {				\
 	static struct intel_wakeref_lockclass __key;			\
 									\
-	__intel_wakeref_init((wf), (rpm), (ops), &__key);		\
+	__intel_wakeref_init((wf), (i915), (ops), &__key);		\
 } while (0)
 
 int __intel_wakeref_get_first(struct intel_wakeref *wf);
@@ -262,7 +262,7 @@ __intel_wakeref_defer_park(struct intel_wakeref *wf)
 int intel_wakeref_wait_for_idle(struct intel_wakeref *wf);
 
 struct intel_wakeref_auto {
-	struct intel_runtime_pm *rpm;
+	struct drm_i915_private *i915;
 	struct timer_list timer;
 	intel_wakeref_t wakeref;
 	spinlock_t lock;
@@ -287,7 +287,7 @@ struct intel_wakeref_auto {
 void intel_wakeref_auto(struct intel_wakeref_auto *wf, unsigned long timeout);
 
 void intel_wakeref_auto_init(struct intel_wakeref_auto *wf,
-			     struct intel_runtime_pm *rpm);
+			     struct drm_i915_private *i915);
 void intel_wakeref_auto_fini(struct intel_wakeref_auto *wf);
 
 #endif /* INTEL_WAKEREF_H */