drm/i915/gt: Split the breadcrumb spinlock between global and contexts

[linux-2.6-microblaze.git] / drivers / gpu / drm / i915 / gt / intel_context_types.h

diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index 20cb583..52fa9c1 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -25,6 +25,7 @@ DECLARE_EWMA(runtime, 3, 8);
 struct i915_gem_context;
 struct i915_gem_ww_ctx;
 struct i915_vma;
+struct intel_breadcrumbs;
 struct intel_context;
 struct intel_ring;
 
@@ -63,8 +64,15 @@ struct intel_context {
        struct i915_address_space *vm;
        struct i915_gem_context __rcu *gem_context;
 
-       struct list_head signal_link;
-       struct list_head signals;
+       /*
+        * @signal_lock protects the list of requests that need signaling,
+        * @signals. While there are any requests that need signaling,
+        * we add the context to the breadcrumbs worker, and remove it
+        * upon completion/cancellation of the last request.
+        */
+       struct list_head signal_link; /* Accessed under RCU */
+       struct list_head signals; /* Guarded by signal_lock */
+       spinlock_t signal_lock; /* protects signals, the list of requests */
 
        struct i915_vma *state;
        struct intel_ring *ring;