[04/11] drm/i915/guc: s/ads_vma/addon

[Oscar Mateo]

This vma contains much more than just the additional data struct (ads)
and since we were already using the word "addon" as an object in
guc_addon_create, make it the preffered one. No need for the vma suffix
either, as that dependency is given by the type.

While at it, add an explanation of what things go inside the addon object.

v2: Move the explanation to the header of the file (Joonas).

Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
Signed-off-by: Oscar Mateo <oscar.mateo at intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_guc_submission.c | 14 ++++++++++----
 drivers/gpu/drm/i915/intel_guc_loader.c    |  4 ++--
 drivers/gpu/drm/i915/intel_uc.h            |  2 +-
 3 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c b/drivers/gpu/drm/i915/i915_guc_submission.c
index 3163aa7..f72b6b0 100644
--- a/drivers/gpu/drm/i915/i915_guc_submission.c
+++ b/drivers/gpu/drm/i915/i915_guc_submission.c
@@ -60,6 +60,13 @@
  * ELSP context descriptor dword into Work Item.
  * See guc_wq_item_append()
  *
+ * Addon object:
+ * The additional data struct (ADS) has pointers for different buffers used by
+ * the GuC. One single gem object, the "addon" object, contains the ADS 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)
@@ -846,9 +853,8 @@ static int guc_addon_create(struct intel_guc *guc)
 	struct page *page;
 	u32 size;
 
-	GEM_BUG_ON(guc->ads_vma);
+	GEM_BUG_ON(guc->addon);
 
-	/* The ads obj includes the struct itself and buffers passed to GuC */
 	size = sizeof(struct guc_ads) + sizeof(struct guc_policies) +
 			sizeof(struct guc_mmio_reg_state) +
 			GUC_S3_SAVE_SPACE_PAGES * PAGE_SIZE;
@@ -857,7 +863,7 @@ static int guc_addon_create(struct intel_guc *guc)
 	if (IS_ERR(vma))
 		return PTR_ERR(vma);
 
-	guc->ads_vma = vma;
+	guc->addon = vma;
 
 	page = i915_vma_first_page(vma);
 	ads = kmap(page);
@@ -906,7 +912,7 @@ static int guc_addon_create(struct intel_guc *guc)
 
 static void guc_addon_destroy(struct intel_guc *guc)
 {
-	i915_vma_unpin_and_release(&guc->ads_vma);
+	i915_vma_unpin_and_release(&guc->addon);
 }
 
 /*
diff --git a/drivers/gpu/drm/i915/intel_guc_loader.c b/drivers/gpu/drm/i915/intel_guc_loader.c
index a2e7b9c..8cbd987 100644
--- a/drivers/gpu/drm/i915/intel_guc_loader.c
+++ b/drivers/gpu/drm/i915/intel_guc_loader.c
@@ -187,8 +187,8 @@ static void guc_params_init(struct drm_i915_private *dev_priv)
 	} else
 		params[GUC_CTL_DEBUG] = GUC_LOG_DISABLED;
 
-	if (guc->ads_vma) {
-		u32 ads = guc_ggtt_offset(guc->ads_vma) >> PAGE_SHIFT;
+	if (guc->addon) {
+		u32 ads = guc_ggtt_offset(guc->addon) >> PAGE_SHIFT;
 		params[GUC_CTL_DEBUG] |= ads << GUC_ADS_ADDR_SHIFT;
 		params[GUC_CTL_DEBUG] |= GUC_ADS_ENABLED;
 	}
diff --git a/drivers/gpu/drm/i915/intel_uc.h b/drivers/gpu/drm/i915/intel_uc.h
index 1a75ef2..6c4d189 100644
--- a/drivers/gpu/drm/i915/intel_uc.h
+++ b/drivers/gpu/drm/i915/intel_uc.h
@@ -152,7 +152,7 @@ struct intel_guc {
 	/* intel_guc_recv interrupt related state */
 	bool interrupts_enabled;
 
-	struct i915_vma *ads_vma;
+	struct i915_vma *addon;
 	struct i915_vma *ctx_pool;
 	void *ctx_pool_vaddr;
 	struct ida ctx_ids;
-- 
1.9.1