drm/i915: Tune down debug output when context is banned

If we have stopped rings then we know that test is running
so no need for spam. In addition, only spam when default
context gets banned.

v2: - make sure default context ban gets shown (Chris)
    - use helper for checking for default context, everywhere (Chris)

v3: - dont be quiet when debug is set (Ben, Daniel)

Reference: https://bugs.freedesktop.org/show_bug.cgi?id=73652
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_drv.h

@@ -2297,6 +2297,11 @@ static inline void i915_gem_context_unreference(struct i915_hw_context *ctx)
 		kref_put(&ctx->ref, i915_gem_context_free);
 }
 
+static inline bool i915_gem_context_is_default(const struct i915_hw_context *c)
+{
+	return c->id == DEFAULT_CONTEXT_ID;
+}
+
 int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
 				  struct drm_file *file);
 int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data,

drivers/gpu/drm/i915/i915_gem.c

@@ -2317,7 +2317,13 @@ static bool i915_context_is_banned(struct drm_device *dev,
 		return true;
 
 	if (elapsed <= DRM_I915_CTX_BAN_PERIOD) {
-		DRM_ERROR("context hanging too fast, declaring banned!\n");
+		if (dev_priv->gpu_error.stop_rings == 0 &&
+		    i915_gem_context_is_default(ctx)) {
+			DRM_ERROR("gpu hanging too fast, banning!\n");
+		} else {
+			DRM_DEBUG("context hanging too fast, banning!\n");
+		}
+
 		return true;
 	}
 

drivers/gpu/drm/i915/i915_gem_context.c

@@ -228,11 +228,6 @@ __create_hw_context(struct drm_device *dev,
 	return ERR_PTR(ret);
 }
 
-static inline bool is_default_context(struct i915_hw_context *ctx)
-{
-	return (ctx->id == DEFAULT_CONTEXT_ID);
-}
-
 /**
  * The default context needs to exist per ring that uses contexts. It stores the
  * context state of the GPU for applications that don't utilize HW contexts, as
@@ -478,7 +473,7 @@ static int context_idr_cleanup(int id, void *p, void *data)
 	struct i915_hw_context *ctx = p;
 
 	/* Ignore the default context because close will handle it */
-	if (is_default_context(ctx))
+	if (i915_gem_context_is_default(ctx))
 		return 0;
 
 	i915_gem_context_unreference(ctx);
@@ -656,7 +651,7 @@ static int do_switch(struct intel_ring_buffer *ring,
 		vma->bind_vma(vma, to->obj->cache_level, GLOBAL_BIND);
 	}
 
-	if (!to->is_initialized || is_default_context(to))
+	if (!to->is_initialized || i915_gem_context_is_default(to))
 		hw_flags |= MI_RESTORE_INHIBIT;
 
 	ret = mi_set_context(ring, to, hw_flags);