drm/i915: Initialize MMIO access for each GT

In a multi-GT system we need to initialize MMIO access for each GT, not
just the primary GT.

Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220906234934.3655440-9-matthew.d.roper@intel.comSigned-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

drivers/gpu/drm/i915/i915_driver.c

@@ -431,7 +431,8 @@ static void i915_driver_late_release(struct drm_i915_private *dev_priv)
  */
 static int i915_driver_mmio_probe(struct drm_i915_private *dev_priv)
 {
-	int ret;
+	struct intel_gt *gt;
+	int ret, i;
 
 	if (i915_inject_probe_failure(dev_priv))
 		return -ENODEV;
@@ -440,17 +441,27 @@ static int i915_driver_mmio_probe(struct drm_i915_private *dev_priv)
 	if (ret < 0)
 		return ret;
 
-	ret = intel_uncore_init_mmio(&dev_priv->uncore);
+	for_each_gt(gt, dev_priv, i) {
+		ret = intel_uncore_init_mmio(gt->uncore);
 		if (ret)
 			return ret;
 
+		ret = drmm_add_action_or_reset(&dev_priv->drm,
+					       intel_uncore_fini_mmio,
+					       gt->uncore);
+		if (ret)
+			return ret;
+	}
+
 	/* Try to make sure MCHBAR is enabled before poking at it */
 	intel_setup_mchbar(dev_priv);
 	intel_device_info_runtime_init(dev_priv);
 
-	ret = intel_gt_init_mmio(to_gt(dev_priv));
+	for_each_gt(gt, dev_priv, i) {
+		ret = intel_gt_init_mmio(gt);
 		if (ret)
 			goto err_uncore;
+	}
 
 	/* As early as possible, scrub existing GPU state before clobbering */
 	sanitize_gpu(dev_priv);
@@ -459,7 +470,6 @@ static int i915_driver_mmio_probe(struct drm_i915_private *dev_priv)
 
 err_uncore:
 	intel_teardown_mchbar(dev_priv);
-	intel_uncore_fini_mmio(&dev_priv->uncore);
 
 	return ret;
 }
@@ -471,7 +481,6 @@ static int i915_driver_mmio_probe(struct drm_i915_private *dev_priv)
 static void i915_driver_mmio_release(struct drm_i915_private *dev_priv)
 {
 	intel_teardown_mchbar(dev_priv);
-	intel_uncore_fini_mmio(&dev_priv->uncore);
 }
 
 /**

drivers/gpu/drm/i915/intel_uncore.c

@@ -2455,8 +2455,11 @@ void intel_uncore_prune_engine_fw_domains(struct intel_uncore *uncore,
 	}
 }
 
-void intel_uncore_fini_mmio(struct intel_uncore *uncore)
+/* Called via drm-managed action */
+void intel_uncore_fini_mmio(struct drm_device *dev, void *data)
 {
+	struct intel_uncore *uncore = data;
+
 	if (intel_uncore_has_forcewake(uncore)) {
 		iosf_mbi_punit_acquire();
 		iosf_mbi_unregister_pmic_bus_access_notifier_unlocked(

drivers/gpu/drm/i915/intel_uncore.h

@@ -33,6 +33,7 @@
 
 #include "i915_reg_defs.h"
 
+struct drm_device;
 struct drm_i915_private;
 struct intel_runtime_pm;
 struct intel_uncore;
@@ -220,7 +221,7 @@ void intel_uncore_prune_engine_fw_domains(struct intel_uncore *uncore,
 bool intel_uncore_unclaimed_mmio(struct intel_uncore *uncore);
 bool intel_uncore_arm_unclaimed_mmio_detection(struct intel_uncore *uncore);
 void intel_uncore_cleanup_mmio(struct intel_uncore *uncore);
-void intel_uncore_fini_mmio(struct intel_uncore *uncore);
+void intel_uncore_fini_mmio(struct drm_device *dev, void *data);
 void intel_uncore_suspend(struct intel_uncore *uncore);
 void intel_uncore_resume_early(struct intel_uncore *uncore);
 void intel_uncore_runtime_resume(struct intel_uncore *uncore);