drm/i915/guc: Split relay control and GuC log level

Those two concepts are really separate. Since GuC is writing data into
its own buffer and we even provide a way for userspace to read directly
from it using i915_guc_log_dump debugfs, there's no real reason to tie
log level with relay creation.
Let's create a separate debugfs, giving userspace a way to create a
relay on demand, when it wants to read a continuous log rather than a
snapshot.

v2: Don't touch guc_log_level on relay creation error, adjust locking
    after rebase, s/dev_priv/i915, pass guc to file->private_data (Sagar)
    Use struct_mutex rather than runtime.lock for set_log_level
v3: Tidy ordering of definitions (Sagar)

Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20180319095348.9716-5-michal.winiarski@intel.com

1 files changed, 0 insertions, 22 deletions

diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
index 765b86a53f19..9bb40cd047a0 100644
--- a/drivers/gpu/drm/i915/intel_uc.c
+++ b/drivers/gpu/drm/i915/intel_uc.c
@@ -221,28 +221,6 @@ static void guc_free_load_err_log(struct intel_guc *guc)
 		i915_gem_object_put(guc->load_err_log);
 }
 
-int intel_uc_register(struct drm_i915_private *i915)
-{
-	int ret = 0;
-
-	if (!USES_GUC(i915))
-		return 0;
-
-	if (i915_modparams.guc_log_level)
-		ret = intel_guc_log_register(&i915->guc.log);
-
-	return ret;
-}
-
-void intel_uc_unregister(struct drm_i915_private *i915)
-{
-	if (!USES_GUC(i915))
-		return;
-
-	if (i915_modparams.guc_log_level)
-		intel_guc_log_unregister(&i915->guc.log);
-}
-
 static int guc_enable_communication(struct intel_guc *guc)
 {
 	struct drm_i915_private *dev_priv = guc_to_i915(guc);