drm/i915: Convert i915_gem_init_hw to intel_gt

More removal of implicit dev_priv from using old mmio accessors.

Actually the top level function remains but is split into a part which
writes to i915 and part which operates on intel_gt in order to initialize
the hardware.

GuC and engines are the only odd ones out remaining.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190621070811.7006-15-tvrtko.ursulin@linux.intel.com

drivers/gpu/drm/i915/i915_gem.c

@@ -1231,28 +1231,32 @@ static void init_unused_rings(struct intel_gt *gt)
 	}
 }
 
-int i915_gem_init_hw(struct drm_i915_private *dev_priv)
+static int init_hw(struct intel_gt *gt)
 {
+	struct drm_i915_private *i915 = gt->i915;
+	struct intel_uncore *uncore = gt->uncore;
 	int ret;
 
-	dev_priv->gt.last_init_time = ktime_get();
+	gt->last_init_time = ktime_get();
 
 	/* Double layer security blanket, see i915_gem_init() */
-	intel_uncore_forcewake_get(&dev_priv->uncore, FORCEWAKE_ALL);
+	intel_uncore_forcewake_get(uncore, FORCEWAKE_ALL);
 
-	if (HAS_EDRAM(dev_priv) && INTEL_GEN(dev_priv) < 9)
-		I915_WRITE(HSW_IDICR, I915_READ(HSW_IDICR) | IDIHASHMSK(0xf));
+	if (HAS_EDRAM(i915) && INTEL_GEN(i915) < 9)
+		intel_uncore_rmw(uncore, HSW_IDICR, 0, IDIHASHMSK(0xf));
 
-	if (IS_HASWELL(dev_priv))
-		I915_WRITE(MI_PREDICATE_RESULT_2, IS_HSW_GT3(dev_priv) ?
-			   LOWER_SLICE_ENABLED : LOWER_SLICE_DISABLED);
+	if (IS_HASWELL(i915))
+		intel_uncore_write(uncore,
+				   MI_PREDICATE_RESULT_2,
+				   IS_HSW_GT3(i915) ?
+				   LOWER_SLICE_ENABLED : LOWER_SLICE_DISABLED);
 
 	/* Apply the GT workarounds... */
-	intel_gt_apply_workarounds(&dev_priv->gt);
+	intel_gt_apply_workarounds(gt);
 	/* ...and determine whether they are sticking. */
-	intel_gt_verify_workarounds(&dev_priv->gt, "init");
+	intel_gt_verify_workarounds(gt, "init");
 
-	intel_gt_init_swizzling(&dev_priv->gt);
+	intel_gt_init_swizzling(gt);
 
 	/*
 	 * At least 830 can leave some of the unused rings
@@ -1260,48 +1264,58 @@ int i915_gem_init_hw(struct drm_i915_private *dev_priv)
 	 * will prevent c3 entry. Makes sure all unused rings
 	 * are totally idle.
 	 */
-	init_unused_rings(&dev_priv->gt);
-
-	BUG_ON(!dev_priv->kernel_context);
-	ret = i915_terminally_wedged(dev_priv);
-	if (ret)
-		goto out;
+	init_unused_rings(gt);
 
-	ret = i915_ppgtt_init_hw(&dev_priv->gt);
+	ret = i915_ppgtt_init_hw(gt);
 	if (ret) {
 		DRM_ERROR("Enabling PPGTT failed (%d)\n", ret);
 		goto out;
 	}
 
-	ret = intel_wopcm_init_hw(&dev_priv->wopcm);
+	ret = intel_wopcm_init_hw(&i915->wopcm);
 	if (ret) {
 		DRM_ERROR("Enabling WOPCM failed (%d)\n", ret);
 		goto out;
 	}
 
 	/* We can't enable contexts until all firmware is loaded */
-	ret = intel_uc_init_hw(dev_priv);
+	ret = intel_uc_init_hw(i915);
 	if (ret) {
 		DRM_ERROR("Enabling uc failed (%d)\n", ret);
 		goto out;
 	}
 
-	intel_mocs_init_l3cc_table(&dev_priv->gt);
+	intel_mocs_init_l3cc_table(gt);
 
 	/* Only when the HW is re-initialised, can we replay the requests */
-	ret = intel_engines_resume(dev_priv);
+	ret = intel_engines_resume(i915);
 	if (ret)
 		goto cleanup_uc;
 
-	intel_uncore_forcewake_put(&dev_priv->uncore, FORCEWAKE_ALL);
+	intel_uncore_forcewake_put(uncore, FORCEWAKE_ALL);
 
-	intel_engines_set_scheduler_caps(dev_priv);
 	return 0;
 
 cleanup_uc:
-	intel_uc_fini_hw(dev_priv);
+	intel_uc_fini_hw(i915);
 out:
-	intel_uncore_forcewake_put(&dev_priv->uncore, FORCEWAKE_ALL);
+	intel_uncore_forcewake_put(uncore, FORCEWAKE_ALL);
+
+	return ret;
+}
+
+int i915_gem_init_hw(struct drm_i915_private *i915)
+{
+	int ret;
+
+	BUG_ON(!i915->kernel_context);
+	ret = i915_terminally_wedged(i915);
+	if (ret)
+		return ret;
+
+	ret = init_hw(&i915->gt);
+
+	intel_engines_set_scheduler_caps(i915);
 
 	return ret;
 }