drm: move AGP definitions harder

Move drm_agp_head to drm_agpsupport.h and drm_agp_mem into drm_legacy.h.
Unfortunately, drivers still heavily access drm_agp_head so we cannot
move it to drm_legacy.h. However, at least it's no longer visible in
drmP.h now (it's directly included from it, though).

Signed-off-by: David Herrmann <[e-mail]>
Reviewed-by: Thierry Reding <[e-mail]>
Signed-off-by: Dave Airlie <[e-mail]>

drivers/gpu/drm/drm_agpsupport.c

···
 #include <drm/drmP.h>
 #include <linux/module.h>
 #include <linux/slab.h>
+#include "drm_legacy.h"
 
 #if __OS_HAS_AGP
 

drivers/gpu/drm/drm_legacy.h

···
  * should no longer be using. They cannot be removed as legacy
  * drivers use them, and removing them are API breaks.
  */
+#include <linux/list.h>
+
+struct agp_memory;
 struct drm_device;
 struct drm_file;
 
···
 int drm_legacy_freebufs(struct drm_device *d, void *v, struct drm_file *f);
 int drm_legacy_mapbufs(struct drm_device *d, void *v, struct drm_file *f);
 int drm_legacy_dma_ioctl(struct drm_device *d, void *v, struct drm_file *f);
+
+/*
+ * AGP Support
+ */
+
+struct drm_agp_mem {
+	unsigned long handle;
+	struct agp_memory *memory;
+	unsigned long bound;
+	int pages;
+	struct list_head head;
+};
 
 #endif /* __DRM_LEGACY_H__ */

drivers/gpu/drm/drm_memory.c

···
 #include <linux/highmem.h>
 #include <linux/export.h>
 #include <drm/drmP.h>
+#include "drm_legacy.h"
 
 #if __OS_HAS_AGP
 static void *agp_remap(unsigned long offset, unsigned long size,

drivers/gpu/drm/drm_vm.c

···
 #include <linux/efi.h>
 #include <linux/slab.h>
 #endif
+#include "drm_legacy.h"
 
 struct drm_vma_entry {
 	struct list_head head;

include/drm/drmP.h

···
 
 struct drm_file;
 struct drm_device;
+struct drm_agp_head;
 
 struct device_node;
 struct videomode;
···
 		_DRM_DMA_USE_PCI_RO = 0x08
 	} flags;
 
-};
-
-/**
- * AGP memory entry.  Stored as a doubly linked list.
- */
-struct drm_agp_mem {
-	unsigned long handle;		/**< handle */
-	struct agp_memory *memory;
-	unsigned long bound;		/**< address */
-	int pages;
-	struct list_head head;
-};
-
-/**
- * AGP data.
- *
- * \sa drm_agp_init() and drm_device::agp.
- */
-struct drm_agp_head {
-	struct agp_kern_info agp_info;		/**< AGP device information */
-	struct list_head memory;
-	unsigned long mode;		/**< AGP mode */
-	struct agp_bridge_data *bridge;
-	int enabled;			/**< whether the AGP bus as been enabled */
-	int acquired;			/**< whether the AGP device has been acquired */
-	unsigned long base;
-	int agp_mtrr;
-	int cant_use_aperture;
-	unsigned long page_mask;
 };
 
 /**

include/drm/drm_agpsupport.h

···
 #include <linux/agp_backend.h>
 #include <drm/drmP.h>
 
+struct drm_agp_head {
+	struct agp_kern_info agp_info;
+	struct list_head memory;
+	unsigned long mode;
+	struct agp_bridge_data *bridge;
+	int enabled;
+	int acquired;
+	unsigned long base;
+	int agp_mtrr;
+	int cant_use_aperture;
+	unsigned long page_mask;
+};
+
 #if __OS_HAS_AGP
 
 void drm_free_agp(struct agp_memory * handle, int pages);