[PATCH 3/8] drm/i915/guc: Extract guc_init from guc_init_hw

Michał Winiarski michal.winiarski at intel.com
Wed Dec 13 12:18:59 UTC 2017


After GPU reset, GuC HW needs to be reinitialized (with FW reload).
Unfortunately, we're doing some extra work there (mostly allocating stuff),
work that can be moved to guc_init and called once at driver load time.

As a side effect we're no longer hitting an assert in
i915_ggtt_enable_guc on suspend/resume.

v2: Do not duplicate disable_communication / reset_guc_interrupts

References: 04f7b24eccdf ("drm/i915/guc: Assert that we switch between known ggtt->invalidate functions")
Signed-off-by: Michał Winiarski <michal.winiarski at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: Sagar Arun Kamble <sagar.a.kamble at intel.com>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_drv.c |  1 +
 drivers/gpu/drm/i915/i915_gem.c |  4 +++
 drivers/gpu/drm/i915/intel_uc.c | 71 ++++++++++++++++++++++++++---------------
 drivers/gpu/drm/i915/intel_uc.h |  2 ++
 4 files changed, 53 insertions(+), 25 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 285c8b238bff..ca9f4b2862eb 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -617,6 +617,7 @@ static void i915_gem_fini(struct drm_i915_private *dev_priv)
 
 	mutex_lock(&dev_priv->drm.struct_mutex);
 	intel_uc_fini_hw(dev_priv);
+	intel_uc_fini(dev_priv);
 	i915_gem_cleanup_engines(dev_priv);
 	i915_gem_contexts_fini(dev_priv);
 	mutex_unlock(&dev_priv->drm.struct_mutex);
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 4b2ca43a610f..77e4091a7c71 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -5187,6 +5187,10 @@ int i915_gem_init(struct drm_i915_private *dev_priv)
 
 	intel_init_gt_powersave(dev_priv);
 
+	ret = intel_uc_init(dev_priv);
+	if (ret)
+		goto out_unlock;
+
 	ret = i915_gem_init_hw(dev_priv);
 	if (ret)
 		goto out_unlock;
diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
index 785850838a44..907deac6e3fa 100644
--- a/drivers/gpu/drm/i915/intel_uc.c
+++ b/drivers/gpu/drm/i915/intel_uc.c
@@ -214,26 +214,20 @@ void intel_uc_fini_wq(struct drm_i915_private *dev_priv)
 	intel_guc_fini_wq(&dev_priv->guc);
 }
 
-int intel_uc_init_hw(struct drm_i915_private *dev_priv)
+int intel_uc_init(struct drm_i915_private *dev_priv)
 {
 	struct intel_guc *guc = &dev_priv->guc;
-	struct intel_huc *huc = &dev_priv->huc;
-	int ret, attempts;
+	int ret;
 
 	if (!USES_GUC(dev_priv))
 		return 0;
 
-	if (!HAS_GUC(dev_priv)) {
-		ret = -ENODEV;
-		goto err_out;
-	}
-
-	guc_disable_communication(guc);
-	gen9_reset_guc_interrupts(dev_priv);
+	if (!HAS_GUC(dev_priv))
+		return -ENODEV;
 
 	ret = intel_guc_init(guc);
 	if (ret)
-		goto err_out;
+		return ret;
 
 	if (USES_GUC_SUBMISSION(dev_priv)) {
 		/*
@@ -241,10 +235,44 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
 		 * if we are planning to enable submission later
 		 */
 		ret = intel_guc_submission_init(guc);
-		if (ret)
-			goto err_guc;
+		if (ret) {
+			intel_guc_fini(guc);
+			return ret;
+		}
 	}
 
+	return 0;
+}
+
+void intel_uc_fini(struct drm_i915_private *dev_priv)
+{
+	struct intel_guc *guc = &dev_priv->guc;
+
+	if (!USES_GUC(dev_priv))
+		return;
+
+	GEM_BUG_ON(!HAS_GUC(dev_priv));
+
+	if (USES_GUC_SUBMISSION(dev_priv))
+		intel_guc_submission_fini(guc);
+
+	intel_guc_fini(guc);
+}
+
+int intel_uc_init_hw(struct drm_i915_private *dev_priv)
+{
+	struct intel_guc *guc = &dev_priv->guc;
+	struct intel_huc *huc = &dev_priv->huc;
+	int ret, attempts;
+
+	if (!USES_GUC(dev_priv))
+		return 0;
+
+	GEM_BUG_ON(!HAS_GUC(dev_priv));
+
+	guc_disable_communication(guc);
+	gen9_reset_guc_interrupts(dev_priv);
+
 	/* init WOPCM */
 	I915_WRITE(GUC_WOPCM_SIZE, intel_guc_wopcm_size(dev_priv));
 	I915_WRITE(DMA_GUC_WOPCM_OFFSET,
@@ -264,12 +292,12 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
 		 */
 		ret = __intel_uc_reset_hw(dev_priv);
 		if (ret)
-			goto err_submission;
+			goto err_out;
 
 		if (USES_HUC(dev_priv)) {
 			ret = intel_huc_init_hw(huc);
 			if (ret)
-				goto err_submission;
+				goto err_out;
 		}
 
 		intel_guc_init_params(guc);
@@ -322,11 +350,6 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
 	guc_disable_communication(guc);
 err_log_capture:
 	guc_capture_load_err_log(guc);
-err_submission:
-	if (USES_GUC_SUBMISSION(dev_priv))
-		intel_guc_submission_fini(guc);
-err_guc:
-	intel_guc_fini(guc);
 err_out:
 	/*
 	 * Note that there is no fallback as either user explicitly asked for
@@ -348,15 +371,13 @@ void intel_uc_fini_hw(struct drm_i915_private *dev_priv)
 	if (!USES_GUC(dev_priv))
 		return;
 
+	GEM_BUG_ON(!HAS_GUC(dev_priv));
+
 	if (USES_GUC_SUBMISSION(dev_priv))
 		intel_guc_submission_disable(guc);
 
 	guc_disable_communication(guc);
 
-	if (USES_GUC_SUBMISSION(dev_priv)) {
+	if (USES_GUC_SUBMISSION(dev_priv))
 		gen9_disable_guc_interrupts(dev_priv);
-		intel_guc_submission_fini(guc);
-	}
-
-	intel_guc_fini(guc);
 }
diff --git a/drivers/gpu/drm/i915/intel_uc.h b/drivers/gpu/drm/i915/intel_uc.h
index 53edfeaf56b0..8a7249722ef1 100644
--- a/drivers/gpu/drm/i915/intel_uc.h
+++ b/drivers/gpu/drm/i915/intel_uc.h
@@ -37,6 +37,8 @@ int intel_uc_init_wq(struct drm_i915_private *dev_priv);
 void intel_uc_fini_wq(struct drm_i915_private *dev_priv);
 int intel_uc_init_hw(struct drm_i915_private *dev_priv);
 void intel_uc_fini_hw(struct drm_i915_private *dev_priv);
+int intel_uc_init(struct drm_i915_private *dev_priv);
+void intel_uc_fini(struct drm_i915_private *dev_priv);
 
 static inline bool intel_uc_is_using_guc(void)
 {
-- 
2.14.3



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