1 files changed, 69 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_region.h b/drivers/gpu/drm/i915/gem/i915_gem_region.h
new file mode 100644
index 000000000..2dfcc41c0
--- /dev/null
+++ b/drivers/gpu/drm/i915/gem/i915_gem_region.h
@@ -0,0 +1,69 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __I915_GEM_REGION_H__
+#define __I915_GEM_REGION_H__
+
+#include <linux/types.h>
+
+struct intel_memory_region;
+struct drm_i915_gem_object;
+struct sg_table;
+
+struct i915_gem_apply_to_region;
+
+#define I915_BO_INVALID_OFFSET ((resource_size_t)-1)
+
+/**
+ * struct i915_gem_apply_to_region_ops - ops to use when iterating over all
+ * region objects.
+ */
+struct i915_gem_apply_to_region_ops {
+	/**
+	 * process_obj - Process the current object
+	 * @apply: Embed this for private data.
+	 * @obj: The current object.
+	 *
+	 * Note that if this function is part of a ww transaction, and
+	 * if returns -EDEADLK for one of the objects, it may be
+	 * rerun for that same object in the same pass.
+	 */
+	int (*process_obj)(struct i915_gem_apply_to_region *apply,
+			   struct drm_i915_gem_object *obj);
+};
+
+/**
+ * struct i915_gem_apply_to_region - Argument to the struct
+ * i915_gem_apply_to_region_ops functions.
+ * @ops: The ops for the operation.
+ * @ww: Locking context used for the transaction.
+ * @interruptible: Whether to perform object locking interruptible.
+ *
+ * This structure is intended to be embedded in a private struct if needed
+ */
+struct i915_gem_apply_to_region {
+	const struct i915_gem_apply_to_region_ops *ops;
+	struct i915_gem_ww_ctx *ww;
+	u32 interruptible:1;
+};
+
+void i915_gem_object_init_memory_region(struct drm_i915_gem_object *obj,
+					struct intel_memory_region *mem);
+void i915_gem_object_release_memory_region(struct drm_i915_gem_object *obj);
+
+struct drm_i915_gem_object *
+i915_gem_object_create_region(struct intel_memory_region *mem,
+			      resource_size_t size,
+			      resource_size_t page_size,
+			      unsigned int flags);
+struct drm_i915_gem_object *
+i915_gem_object_create_region_at(struct intel_memory_region *mem,
+				 resource_size_t offset,
+				 resource_size_t size,
+				 unsigned int flags);
+
+int i915_gem_process_region(struct intel_memory_region *mr,
+			    struct i915_gem_apply_to_region *apply);
+#endif