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Diffstat (limited to 'drivers/gpu/drm/i915/gt/intel_context.h')
-rw-r--r--drivers/gpu/drm/i915/gt/intel_context.h130
1 files changed, 130 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_context.h b/drivers/gpu/drm/i915/gt/intel_context.h
new file mode 100644
index 000000000000..63392c88cd98
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/intel_context.h
@@ -0,0 +1,130 @@
+/*
+ * SPDX-License-Identifier: MIT
+ *
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_CONTEXT_H__
+#define __INTEL_CONTEXT_H__
+
+#include <linux/lockdep.h>
+
+#include "intel_context_types.h"
+#include "intel_engine_types.h"
+
+void intel_context_init(struct intel_context *ce,
+ struct i915_gem_context *ctx,
+ struct intel_engine_cs *engine);
+
+struct intel_context *
+intel_context_create(struct i915_gem_context *ctx,
+ struct intel_engine_cs *engine);
+
+void intel_context_free(struct intel_context *ce);
+
+/**
+ * intel_context_lock_pinned - Stablises the 'pinned' status of the HW context
+ * @ce - the context
+ *
+ * Acquire a lock on the pinned status of the HW context, such that the context
+ * can neither be bound to the GPU or unbound whilst the lock is held, i.e.
+ * intel_context_is_pinned() remains stable.
+ */
+static inline int intel_context_lock_pinned(struct intel_context *ce)
+ __acquires(ce->pin_mutex)
+{
+ return mutex_lock_interruptible(&ce->pin_mutex);
+}
+
+/**
+ * intel_context_is_pinned - Reports the 'pinned' status
+ * @ce - the context
+ *
+ * While in use by the GPU, the context, along with its ring and page
+ * tables is pinned into memory and the GTT.
+ *
+ * Returns: true if the context is currently pinned for use by the GPU.
+ */
+static inline bool
+intel_context_is_pinned(struct intel_context *ce)
+{
+ return atomic_read(&ce->pin_count);
+}
+
+/**
+ * intel_context_unlock_pinned - Releases the earlier locking of 'pinned' status
+ * @ce - the context
+ *
+ * Releases the lock earlier acquired by intel_context_unlock_pinned().
+ */
+static inline void intel_context_unlock_pinned(struct intel_context *ce)
+ __releases(ce->pin_mutex)
+{
+ mutex_unlock(&ce->pin_mutex);
+}
+
+int __intel_context_do_pin(struct intel_context *ce);
+
+static inline int intel_context_pin(struct intel_context *ce)
+{
+ if (likely(atomic_inc_not_zero(&ce->pin_count)))
+ return 0;
+
+ return __intel_context_do_pin(ce);
+}
+
+static inline void __intel_context_pin(struct intel_context *ce)
+{
+ GEM_BUG_ON(!intel_context_is_pinned(ce));
+ atomic_inc(&ce->pin_count);
+}
+
+void intel_context_unpin(struct intel_context *ce);
+
+void intel_context_enter_engine(struct intel_context *ce);
+void intel_context_exit_engine(struct intel_context *ce);
+
+static inline void intel_context_enter(struct intel_context *ce)
+{
+ if (!ce->active_count++)
+ ce->ops->enter(ce);
+}
+
+static inline void intel_context_mark_active(struct intel_context *ce)
+{
+ ++ce->active_count;
+}
+
+static inline void intel_context_exit(struct intel_context *ce)
+{
+ GEM_BUG_ON(!ce->active_count);
+ if (!--ce->active_count)
+ ce->ops->exit(ce);
+}
+
+static inline struct intel_context *intel_context_get(struct intel_context *ce)
+{
+ kref_get(&ce->ref);
+ return ce;
+}
+
+static inline void intel_context_put(struct intel_context *ce)
+{
+ kref_put(&ce->ref, ce->ops->destroy);
+}
+
+static inline void intel_context_timeline_lock(struct intel_context *ce)
+ __acquires(&ce->ring->timeline->mutex)
+{
+ mutex_lock(&ce->ring->timeline->mutex);
+}
+
+static inline void intel_context_timeline_unlock(struct intel_context *ce)
+ __releases(&ce->ring->timeline->mutex)
+{
+ mutex_unlock(&ce->ring->timeline->mutex);
+}
+
+struct i915_request *intel_context_create_request(struct intel_context *ce);
+
+#endif /* __INTEL_CONTEXT_H__ */