drm/i915: Account ring buffer and context state storage

Account ring buffers and logical context space against the owning client
memory usage stats.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Aravind Iddamsetty <aravind.iddamsetty@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231107101806.608990-4-tvrtko.ursulin@linux.intel.com

drivers/gpu/drm/i915/gt/intel_context.c

@@ -6,6 +6,7 @@
 #include "gem/i915_gem_context.h"
 #include "gem/i915_gem_pm.h"
 
+#include "i915_drm_client.h"
 #include "i915_drv.h"
 #include "i915_trace.h"
 
@@ -50,6 +51,7 @@ intel_context_create(struct intel_engine_cs *engine)
 
 int intel_context_alloc_state(struct intel_context *ce)
 {
+	struct i915_gem_context *ctx;
 	int err = 0;
 
 	if (mutex_lock_interruptible(&ce->pin_mutex))
@@ -66,6 +68,18 @@ int intel_context_alloc_state(struct intel_context *ce)
 			goto unlock;
 
 		set_bit(CONTEXT_ALLOC_BIT, &ce->flags);
+
+		rcu_read_lock();
+		ctx = rcu_dereference(ce->gem_context);
+		if (ctx && !kref_get_unless_zero(&ctx->ref))
+			ctx = NULL;
+		rcu_read_unlock();
+		if (ctx) {
+			if (ctx->client)
+				i915_drm_client_add_context_objects(ctx->client,
+								    ce);
+			i915_gem_context_put(ctx);
+		}
 	}
 
 unlock:

drivers/gpu/drm/i915/i915_drm_client.c

@@ -144,4 +144,14 @@ bool i915_drm_client_remove_object(struct drm_i915_gem_object *obj)
 
 	return true;
 }
+
+void i915_drm_client_add_context_objects(struct i915_drm_client *client,
+					 struct intel_context *ce)
+{
+	if (ce->state)
+		i915_drm_client_add_object(client, ce->state->obj);
+
+	if (ce->ring != ce->engine->legacy.ring && ce->ring->vma)
+		i915_drm_client_add_object(client, ce->ring->vma->obj);
+}
 #endif

drivers/gpu/drm/i915/i915_drm_client.h

@@ -14,6 +14,7 @@
 
 #include "i915_file_private.h"
 #include "gem/i915_gem_object_types.h"
+#include "gt/intel_context_types.h"
 
 #define I915_LAST_UABI_ENGINE_CLASS I915_ENGINE_CLASS_COMPUTE
 
@@ -70,6 +71,8 @@ void i915_drm_client_fdinfo(struct drm_printer *p, struct drm_file *file);
 void i915_drm_client_add_object(struct i915_drm_client *client,
 				struct drm_i915_gem_object *obj);
 bool i915_drm_client_remove_object(struct drm_i915_gem_object *obj);
+void i915_drm_client_add_context_objects(struct i915_drm_client *client,
+					 struct intel_context *ce);
 #else
 static inline void i915_drm_client_add_object(struct i915_drm_client *client,
 					      struct drm_i915_gem_object *obj)
@@ -79,6 +82,12 @@ static inline void i915_drm_client_add_object(struct i915_drm_client *client,
 static inline bool i915_drm_client_remove_object(struct drm_i915_gem_object *obj)
 {
 }
+
+static inline void
+i915_drm_client_add_context_objects(struct i915_drm_client *client,
+				    struct intel_context *ce)
+{
+}
 #endif
 
 #endif /* !__I915_DRM_CLIENT_H__ */