[PATCH v2 2/2] drm/i915/guc : Decouple logs from submission

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v2: Decoupling ADS together with logs
v2: Group initialization of GuC objects


Cc: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
Cc: Oscar Mateo <oscar.mateo@xxxxxxxxx>
Cc: Anusha Srivatsa <anusha.srivatsa@xxxxxxxxx>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
Signed-off-by: Sujaritha Sundaresan <sujaritha.sundaresan@xxxxxxxxx>
---
 drivers/gpu/drm/i915/i915_guc_submission.c | 108 ++--------------------
 drivers/gpu/drm/i915/intel_uc.c            | 140 ++++++++++++++++++++++++++---
 drivers/gpu/drm/i915/intel_uc.h            |   6 +-
 3 files changed, 134 insertions(+), 120 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c b/drivers/gpu/drm/i915/i915_guc_submission.c
index a15146e..3a4bdb4 100644
--- a/drivers/gpu/drm/i915/i915_guc_submission.c
+++ b/drivers/gpu/drm/i915/i915_guc_submission.c
@@ -70,14 +70,6 @@
  * represents in-order queue. The kernel driver packs ring tail pointer and an
  * ELSP context descriptor dword into Work Item.
  * See guc_wq_item_append()
- *
- * ADS:
- * The Additional Data Struct (ADS) has pointers for different buffers used by
- * the GuC. One single gem object contains the ADS struct itself (guc_ads), the
- * scheduling policies (guc_policies), a structure describing a collection of
- * register sets (guc_mmio_reg_state) and some extra pages for the GuC to save
- * its internal state for sleep.
- *
  */
 
 static inline bool is_high_priority(struct i915_guc_client* client)
@@ -996,7 +988,7 @@ static void guc_client_free(struct i915_guc_client *client)
 	kfree(client);
 }
 
-static void guc_policies_init(struct guc_policies *policies)
+void i915_guc_policies_init(struct guc_policies *policies)
 {
 	struct guc_policy *policy;
 	u32 p, i;
@@ -1018,83 +1010,14 @@ static void guc_policies_init(struct guc_policies *policies)
 	policies->is_valid = 1;
 }
 
-static int guc_ads_create(struct intel_guc *guc)
-{
-	struct drm_i915_private *dev_priv = guc_to_i915(guc);
-	struct i915_vma *vma;
-	struct page *page;
-	/* The ads obj includes the struct itself and buffers passed to GuC */
-	struct {
-		struct guc_ads ads;
-		struct guc_policies policies;
-		struct guc_mmio_reg_state reg_state;
-		u8 reg_state_buffer[GUC_S3_SAVE_SPACE_PAGES * PAGE_SIZE];
-	} __packed *blob;
-	struct intel_engine_cs *engine;
-	enum intel_engine_id id;
-	u32 base;
-
-	GEM_BUG_ON(guc->ads_vma);
-
-	vma = intel_guc_allocate_vma(guc, PAGE_ALIGN(sizeof(*blob)));
-	if (IS_ERR(vma))
-		return PTR_ERR(vma);
-
-	guc->ads_vma = vma;
-
-	page = i915_vma_first_page(vma);
-	blob = kmap(page);
-
-	/* GuC scheduling policies */
-	guc_policies_init(&blob->policies);
-
-	/* MMIO reg state */
-	for_each_engine(engine, dev_priv, id) {
-		blob->reg_state.white_list[engine->guc_id].mmio_start =
-			engine->mmio_base + GUC_MMIO_WHITE_LIST_START;
-
-		/* Nothing to be saved or restored for now. */
-		blob->reg_state.white_list[engine->guc_id].count = 0;
-	}
-
-	/*
-	 * The GuC requires a "Golden Context" when it reinitialises
-	 * engines after a reset. Here we use the Render ring default
-	 * context, which must already exist and be pinned in the GGTT,
-	 * so its address won't change after we've told the GuC where
-	 * to find it.
-	 */
-	blob->ads.golden_context_lrca =
-		dev_priv->engine[RCS]->status_page.ggtt_offset;
-
-	for_each_engine(engine, dev_priv, id)
-		blob->ads.eng_state_size[engine->guc_id] = engine->context_size;
-
-	base = guc_ggtt_offset(vma);
-	blob->ads.scheduler_policies = base + ptr_offset(blob, policies);
-	blob->ads.reg_state_buffer = base + ptr_offset(blob, reg_state_buffer);
-	blob->ads.reg_state_addr = base + ptr_offset(blob, reg_state);
-
-	kunmap(page);
-
-	return 0;
-}
-
-static void guc_ads_destroy(struct intel_guc *guc)
-{
-	i915_vma_unpin_and_release(&guc->ads_vma);
-}
-
 /*
  * Set up the memory resources to be shared with the GuC (via the GGTT)
  * at firmware loading time.
  */
-int i915_guc_submission_init(struct drm_i915_private *dev_priv)
+int i915_guc_submission_shared_objects_init(struct intel_guc *guc)
 {
-	struct intel_guc *guc = &dev_priv->guc;
 	struct i915_vma *vma;
 	void *vaddr;
-	int ret;
 
 	if (guc->stage_desc_pool)
 		return 0;
@@ -1109,42 +1032,21 @@ int i915_guc_submission_init(struct drm_i915_private *dev_priv)
 
 	vaddr = i915_gem_object_pin_map(guc->stage_desc_pool->obj, I915_MAP_WB);
 	if (IS_ERR(vaddr)) {
-		ret = PTR_ERR(vaddr);
-		goto err_vma;
+		i915_vma_unpin_and_release(&guc->stage_desc_pool);
+		return PTR_ERR(vaddr);
 	}
 
 	guc->stage_desc_pool_vaddr = vaddr;
 
-	ret = intel_guc_log_create(guc);
-	if (ret < 0)
-		goto err_vaddr;
-	
-
-	ret = guc_ads_create(guc);
-	if (ret < 0)
-		goto err_log;
-
 	ida_init(&guc->stage_ids);
 
 	return 0;
 
-err_log:
-	intel_guc_log_destroy(guc);
-	
-err_vaddr:
-	i915_gem_object_unpin_map(guc->stage_desc_pool->obj);
-err_vma:
-	i915_vma_unpin_and_release(&guc->stage_desc_pool);
-	return ret;
 }
 
-void i915_guc_submission_fini(struct drm_i915_private *dev_priv)
+void i915_guc_submission_shared_objects_fini(struct intel_guc *guc)
 {
-	struct intel_guc *guc = &dev_priv->guc;
-
 	ida_destroy(&guc->stage_ids);
-	guc_ads_destroy(guc);
-	intel_guc_log_destroy(guc);
 	i915_gem_object_unpin_map(guc->stage_desc_pool->obj);
 	i915_vma_unpin_and_release(&guc->stage_desc_pool);
 }
diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
index 52687e3..a334926 100644
--- a/drivers/gpu/drm/i915/intel_uc.c
+++ b/drivers/gpu/drm/i915/intel_uc.c
@@ -326,6 +326,124 @@ static int guc_enable_communication(struct intel_guc *guc)
 	return 0;
 }
 
+/*
+ * The Additional Data Struct (ADS) has pointers for different buffers used by
+ * the GuC. One single gem object contains the ADS struct itself (guc_ads), the
+ * scheduling policies (guc_policies), a structure describing a collection of
+ * register sets (guc_mmio_reg_state) and some extra pages for the GuC to save
+ * its internal state for sleep.
+ */
+static int guc_ads_create(struct intel_guc *guc)
+{
+	struct drm_i915_private *dev_priv = guc_to_i915(guc);
+ 	struct i915_vma *vma;
+ 	struct page *page;
+ 	/* The ads obj includes the struct itself and buffers passed to GuC */
+ 	struct {
+ 		struct guc_ads ads;
+ 		struct guc_policies policies;
+ 		struct guc_mmio_reg_state reg_state;
+ 		u8 reg_state_buffer[GUC_S3_SAVE_SPACE_PAGES * PAGE_SIZE];
+ 	} __packed *blob;
+ 	struct intel_engine_cs *engine;
+ 	enum intel_engine_id id;
+ 	u32 base;
+ 
+ 	GEM_BUG_ON(guc->ads_vma);
+ 
+	vma = intel_guc_allocate_vma(guc, PAGE_ALIGN(sizeof(*blob)));
+ 	if (IS_ERR(vma))
+ 		return PTR_ERR(vma);
+ 
+ 	guc->ads_vma = vma;
+ 
+ 	page = i915_vma_first_page(vma);
+ 	blob = kmap(page);
+ 
+ 	/* GuC scheduling policies */
+ 	i915_guc_policies_init(&blob->policies);
+ 
+ 	/* MMIO reg state */
+ 	for_each_engine(engine, dev_priv, id) {
+ 		blob->reg_state.white_list[engine->guc_id].mmio_start =
+ 			engine->mmio_base + GUC_MMIO_WHITE_LIST_START;
+ 
+ 		/* Nothing to be saved or restored for now. */
+ 		blob->reg_state.white_list[engine->guc_id].count = 0;
+ 	}
+ 
+ 	/*
+ 	 * The GuC requires a "Golden Context" when it reinitialises
+ 	 * engines after a reset. Here we use the Render ring default
+ 	 * context, which must already exist and be pinned in the GGTT,
+ 	 * so its address won't change after we've told the GuC where
+ 	 * to find it.
+ 	 */
+ 	blob->ads.golden_context_lrca =
+ 		dev_priv->engine[RCS]->status_page.ggtt_offset;
+ 
+ 	for_each_engine(engine, dev_priv, id)
+ 		blob->ads.eng_state_size[engine->guc_id] = engine->context_size;
+ 
+ 	base = guc_ggtt_offset(vma);
+ 	blob->ads.scheduler_policies = base + ptr_offset(blob, policies);
+ 	blob->ads.reg_state_buffer = base + ptr_offset(blob, reg_state_buffer);
+ 	blob->ads.reg_state_addr = base + ptr_offset(blob, reg_state);
+ 
+ 	kunmap(page);
+ 
+ 	return 0;
+}
+
+static void guc_ads_destroy(struct intel_guc *guc)
+{
+	i915_vma_unpin_and_release(&guc->ads_vma);
+}
+
+static int guc_shared_objects_init(struct intel_guc *guc)
+{
+	int ret;
+
+	if (guc->ads_vma)
+		return 0;
+
+	ret = intel_guc_log_create(guc);
+	if (ret < 0)
+		return ret;
+
+	ret = guc_ads_create(guc);
+	if (ret < 0)
+		goto err_logs;
+
+	if (i915.enable_guc_submission) {
+		/*
+		 * This is stuff we need to have available at fw load time
+		 * if we are planning to enable submission later
+		 */
+		ret = i915_guc_submission_shared_objects_init(guc);
+		if (ret)
+			goto err_ads;
+	}
+			
+	return 0;
+			
+err_ads:
+	guc_ads_destroy(guc);
+err_logs:
+	intel_guc_log_destroy(guc);
+
+	return ret;
+}
+
+static void guc_shared_objects_fini(struct intel_guc *guc)
+{
+	if (i915.enable_guc_submission)
+		i915_guc_submission_shared_objects_fini(guc);
+
+	guc_ads_destroy(guc);
+	intel_guc_log_destroy(guc);
+}
+
 static void guc_disable_communication(struct intel_guc *guc)
 {
 	struct drm_i915_private *dev_priv = guc_to_i915(guc);
@@ -350,15 +468,10 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
 	/* We need to notify the guc whenever we change the GGTT */
 	i915_ggtt_enable_guc(dev_priv);
 
-	if (i915.enable_guc_submission) {
-		/*
-		 * This is stuff we need to have available at fw load time
-		 * if we are planning to enable submission later
-		 */
-		ret = i915_guc_submission_init(dev_priv);
-		if (ret)
-			goto err_guc;
-	}
+	ret = guc_shared_objects_init(guc);
+	if (ret)
+		goto err_guc;
+	
 
 	/* init WOPCM */
 	I915_WRITE(GUC_WOPCM_SIZE, intel_guc_wopcm_size(dev_priv));
@@ -379,7 +492,7 @@ 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_shared;
 
 		intel_huc_init_hw(&dev_priv->huc);
 		ret = intel_guc_init_hw(&dev_priv->guc);
@@ -424,9 +537,8 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
 	gen9_disable_guc_interrupts(dev_priv);
 err_log_capture:
 	guc_capture_load_err_log(guc);
-err_submission:
-	if (i915.enable_guc_submission)
-		i915_guc_submission_fini(dev_priv);
+err_shared:
+	guc_shared_objects_fini(guc);
 err_guc:
 	i915_ggtt_disable_guc(dev_priv);
 
@@ -459,9 +571,9 @@ void intel_uc_fini_hw(struct drm_i915_private *dev_priv)
 
 	if (i915.enable_guc_submission) {
 		gen9_disable_guc_interrupts(dev_priv);
-		i915_guc_submission_fini(dev_priv);
 	}
 
+	guc_shared_objects_fini(&dev_priv->guc);
 	i915_ggtt_disable_guc(dev_priv);
 }
 
diff --git a/drivers/gpu/drm/i915/intel_uc.h b/drivers/gpu/drm/i915/intel_uc.h
index 731ec16..f935556 100644
--- a/drivers/gpu/drm/i915/intel_uc.h
+++ b/drivers/gpu/drm/i915/intel_uc.h
@@ -249,14 +249,14 @@ static inline void intel_guc_notify(struct intel_guc *guc)
 
 
 /* i915_guc_submission.c */
-int i915_guc_submission_init(struct drm_i915_private *dev_priv);
+int i915_guc_submission_shared_objects_init(struct intel_guc *guc);
 int i915_guc_submission_enable(struct drm_i915_private *dev_priv);
 int i915_guc_wq_reserve(struct drm_i915_gem_request *rq);
 void i915_guc_wq_unreserve(struct drm_i915_gem_request *request);
 void i915_guc_submission_disable(struct drm_i915_private *dev_priv);
-void i915_guc_submission_fini(struct drm_i915_private *dev_priv);
+void i915_guc_submission_shared_objects_fini(struct intel_guc *guc);
 struct i915_vma *intel_guc_allocate_vma(struct intel_guc *guc, u32 size);
-
+void i915_guc_policies_init(struct guc_policies *policies);
 
 /* intel_guc_log.c */
 int intel_guc_log_create(struct intel_guc *guc);
-- 
1.9.1

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