drm/i915: split out gem/i915_gem_dmabuf.h from i915_drv.h

We already have the gem/i915_gem_dmabuf.c file.

Cc: Tvrtko Ursulin <[e-mail]>
Cc: Daniel Vetter <[e-mail]>
Signed-off-by: Jani Nikula <[e-mail]>
Acked-by: Tvrtko Ursulin <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/2f3[e-mail]

drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c

···
 
 #include <asm/smp.h>
 
+#include "gem/i915_gem_dmabuf.h"
 #include "i915_drv.h"
 #include "i915_gem_object.h"
 #include "i915_scatterlist.h"

drivers/gpu/drm/i915/gem/i915_gem_dmabuf.h

···
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#ifndef __I915_GEM_DMABUF_H__
+#define __I915_GEM_DMABUF_H__
+
+struct drm_gem_object;
+struct drm_device;
+struct dma_buf;
+
+struct drm_gem_object *i915_gem_prime_import(struct drm_device *dev,
+					     struct dma_buf *dma_buf);
+
+struct dma_buf *i915_gem_prime_export(struct drm_gem_object *gem_obj, int flags);
+
+#endif /* __I915_GEM_DMABUF_H__ */

drivers/gpu/drm/i915/gem/i915_gem_object.c

···
 
 #include "display/intel_frontbuffer.h"
 #include "pxp/intel_pxp.h"
+
 #include "i915_drv.h"
 #include "i915_gem_clflush.h"
 #include "i915_gem_context.h"
+#include "i915_gem_dmabuf.h"
 #include "i915_gem_mman.h"
 #include "i915_gem_object.h"
 #include "i915_gem_ttm.h"

drivers/gpu/drm/i915/gvt/dmabuf.c

···
 #include <linux/dma-buf.h>
 #include <linux/vfio.h>
 
+#include "gem/i915_gem_dmabuf.h"
+
 #include "i915_drv.h"
 #include "i915_reg.h"
 #include "gvt.h"

drivers/gpu/drm/i915/i915_driver.c

···
 #include "display/intel_vga.h"
 
 #include "gem/i915_gem_context.h"
+#include "gem/i915_gem_dmabuf.h"
 #include "gem/i915_gem_ioctls.h"
 #include "gem/i915_gem_mman.h"
 #include "gem/i915_gem_pm.h"

drivers/gpu/drm/i915/i915_drv.h

···
 int i915_gem_object_set_cache_level(struct drm_i915_gem_object *obj,
 				    enum i915_cache_level cache_level);
 
-struct drm_gem_object *i915_gem_prime_import(struct drm_device *dev,
-				struct dma_buf *dma_buf);
-
-struct dma_buf *i915_gem_prime_export(struct drm_gem_object *gem_obj, int flags);
-
 static inline struct i915_address_space *
 i915_gem_vm_lookup(struct drm_i915_file_private *file_priv, u32 id)
 {