drivers/gpu/drm/virtio/virtgpu_drv.h - kernel/bruno - Git at Google

 /*
  * Copyright (C) 2015 Red Hat, Inc.
  * All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
  * "Software"), to deal in the Software without restriction, including
  * without limitation the rights to use, copy, modify, merge, publish,
  * distribute, sublicense, and/or sell copies of the Software, and to
  * permit persons to whom the Software is furnished to do so, subject to
  * the following conditions:
  *
  * The above copyright notice and this permission notice (including the
  * next paragraph) shall be included in all copies or substantial
  * portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */

 #ifndef VIRTIO_DRV_H
 #define VIRTIO_DRV_H

 #include <linux/virtio.h>
 #include <linux/virtio_ids.h>
 #include <linux/virtio_config.h>
 #include <linux/virtio_gpu.h>

 #include <drm/drmP.h>
 #include <drm/drm_gem.h>
 #include <drm/drm_crtc_helper.h>
 #include <ttm/ttm_bo_api.h>
 #include <ttm/ttm_bo_driver.h>
 #include <ttm/ttm_placement.h>
 #include <ttm/ttm_module.h>

 #define DRIVER_NAME "virtio_gpu"
 #define DRIVER_DESC "virtio GPU"
 #define DRIVER_DATE "0"

 #define DRIVER_MAJOR 0
 #define DRIVER_MINOR 0
 #define DRIVER_PATCHLEVEL 1

 /* virtgpu_drm_bus.c */
 int drm_virtio_set_busid(struct drm_device *dev, struct drm_master *master);
 int drm_virtio_init(struct drm_driver *driver, struct virtio_device *vdev);

 struct virtio_gpu_object {
 	struct drm_gem_object gem_base;
 	uint32_t hw_res_handle;

 	struct sg_table *pages;
 	void *vmap;
 	bool dumb;
 	struct ttm_place                placement_code;
 	struct ttm_placement		placement;
 	struct ttm_buffer_object	tbo;
 	struct ttm_bo_kmap_obj		kmap;
 };
 #define gem_to_virtio_gpu_obj(gobj) \
 	container_of((gobj), struct virtio_gpu_object, gem_base)

 struct virtio_gpu_vbuffer;
 struct virtio_gpu_device;

 typedef void (*virtio_gpu_resp_cb)(struct virtio_gpu_device *vgdev,
 				   struct virtio_gpu_vbuffer *vbuf);

 struct virtio_gpu_fence_driver {
 	atomic64_t       last_seq;
 	uint64_t         sync_seq;
 	struct list_head fences;
 	spinlock_t       lock;
 };

 struct virtio_gpu_fence {
 	struct fence f;
 	struct virtio_gpu_fence_driver *drv;
 	struct list_head node;
 	uint64_t seq;
 };
 #define to_virtio_fence(x) \
 	container_of(x, struct virtio_gpu_fence, f)

 struct virtio_gpu_vbuffer {
 	char *buf;
 	int size;

 	void *data_buf;
 	uint32_t data_size;

 	char *resp_buf;
 	int resp_size;

 	virtio_gpu_resp_cb resp_cb;

 	struct list_head list;
 };

 struct virtio_gpu_output {
 	int index;
 	struct drm_crtc crtc;
 	struct drm_connector conn;
 	struct drm_encoder enc;
 	struct virtio_gpu_display_one info;
 	struct virtio_gpu_update_cursor cursor;
 	int cur_x;
 	int cur_y;
 };
 #define drm_crtc_to_virtio_gpu_output(x) \
 	container_of(x, struct virtio_gpu_output, crtc)
 #define drm_connector_to_virtio_gpu_output(x) \
 	container_of(x, struct virtio_gpu_output, conn)
 #define drm_encoder_to_virtio_gpu_output(x) \
 	container_of(x, struct virtio_gpu_output, enc)

 struct virtio_gpu_framebuffer {
 	struct drm_framebuffer base;
 	struct drm_gem_object *obj;
 	int x1, y1, x2, y2; /* dirty rect */
 	spinlock_t dirty_lock;
 	uint32_t hw_res_handle;
 };
 #define to_virtio_gpu_framebuffer(x) \
 	container_of(x, struct virtio_gpu_framebuffer, base)

 struct virtio_gpu_mman {
 	struct ttm_bo_global_ref        bo_global_ref;
 	struct drm_global_reference	mem_global_ref;
 	bool				mem_global_referenced;
 	struct ttm_bo_device		bdev;
 };

 struct virtio_gpu_fbdev;

 struct virtio_gpu_queue {
 	struct virtqueue *vq;
 	spinlock_t qlock;
 	wait_queue_head_t ack_queue;
 	struct work_struct dequeue_work;
 };

 struct virtio_gpu_drv_capset {
 	uint32_t id;
 	uint32_t max_version;
 	uint32_t max_size;
 };

 struct virtio_gpu_drv_cap_cache {
 	struct list_head head;
 	void *caps_cache;
 	uint32_t id;
 	uint32_t version;
 	uint32_t size;
 	atomic_t is_valid;
 };

 struct virtio_gpu_device {
 	struct device *dev;
 	struct drm_device *ddev;

 	struct virtio_device *vdev;

 	struct virtio_gpu_mman mman;

 	/* pointer to fbdev info structure */
 	struct virtio_gpu_fbdev *vgfbdev;
 	struct virtio_gpu_output outputs[VIRTIO_GPU_MAX_SCANOUTS];
 	uint32_t num_scanouts;

 	struct virtio_gpu_queue ctrlq;
 	struct virtio_gpu_queue cursorq;
 	struct list_head free_vbufs;
 	spinlock_t free_vbufs_lock;
 	void *vbufs;
 	bool vqs_ready;

 	struct idr	resource_idr;
 	spinlock_t resource_idr_lock;

 	wait_queue_head_t resp_wq;
 	/* current display info */
 	spinlock_t display_info_lock;
 	bool display_info_pending;

 	struct virtio_gpu_fence_driver fence_drv;

 	struct idr	ctx_id_idr;
 	spinlock_t ctx_id_idr_lock;

 	bool has_virgl_3d;

 	struct work_struct config_changed_work;

 	struct virtio_gpu_drv_capset *capsets;
 	uint32_t num_capsets;
 	struct list_head cap_cache;
 };

 struct virtio_gpu_fpriv {
 	uint32_t ctx_id;
 };

 /* virtio_ioctl.c */
 #define DRM_VIRTIO_NUM_IOCTLS 10
 extern struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS];

 /* virtio_kms.c */
 int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags);
 int virtio_gpu_driver_unload(struct drm_device *dev);
 int virtio_gpu_driver_open(struct drm_device *dev, struct drm_file *file);
 void virtio_gpu_driver_postclose(struct drm_device *dev, struct drm_file *file);

 /* virtio_gem.c */
 void virtio_gpu_gem_free_object(struct drm_gem_object *gem_obj);
 int virtio_gpu_gem_init(struct virtio_gpu_device *vgdev);
 void virtio_gpu_gem_fini(struct virtio_gpu_device *vgdev);
 int virtio_gpu_gem_create(struct drm_file *file,
 			  struct drm_device *dev,
 			  uint64_t size,
 			  struct drm_gem_object **obj_p,
 			  uint32_t *handle_p);
 int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
 			       struct drm_file *file);
 void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
 				 struct drm_file *file);
 struct virtio_gpu_object *virtio_gpu_alloc_object(struct drm_device *dev,
 						  size_t size, bool kernel,
 						  bool pinned);
 int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
 				struct drm_device *dev,
 				struct drm_mode_create_dumb *args);
 int virtio_gpu_mode_dumb_destroy(struct drm_file *file_priv,
 				 struct drm_device *dev,
 				 uint32_t handle);
 int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
 			      struct drm_device *dev,
 			      uint32_t handle, uint64_t *offset_p);

 /* virtio_fb */
 #define VIRTIO_GPUFB_CONN_LIMIT 1
 int virtio_gpu_fbdev_init(struct virtio_gpu_device *vgdev);
 void virtio_gpu_fbdev_fini(struct virtio_gpu_device *vgdev);
 int virtio_gpu_surface_dirty(struct virtio_gpu_framebuffer *qfb,
 			     struct drm_clip_rect *clips,
 			     unsigned num_clips);
 /* virtio vg */
 int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev);
 void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev);
 void virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev,
 			       uint32_t *resid);
 void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id);
 void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev,
 				    uint32_t resource_id,
 				    uint32_t format,
 				    uint32_t width,
 				    uint32_t height);
 void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev,
 				   uint32_t resource_id);
 void virtio_gpu_cmd_transfer_to_host_2d(struct virtio_gpu_device *vgdev,
 					uint32_t resource_id, uint64_t offset,
 					__le32 width, __le32 height,
 					__le32 x, __le32 y,
 					struct virtio_gpu_fence **fence);
 void virtio_gpu_cmd_resource_flush(struct virtio_gpu_device *vgdev,
 				   uint32_t resource_id,
 				   uint32_t x, uint32_t y,
 				   uint32_t width, uint32_t height);
 void virtio_gpu_cmd_set_scanout(struct virtio_gpu_device *vgdev,
 				uint32_t scanout_id, uint32_t resource_id,
 				uint32_t width, uint32_t height,
 				uint32_t x, uint32_t y);
 int virtio_gpu_object_attach(struct virtio_gpu_device *vgdev,
 			     struct virtio_gpu_object *obj,
 			     uint32_t resource_id,
 			     struct virtio_gpu_fence **fence);
 int virtio_gpu_attach_status_page(struct virtio_gpu_device *vgdev);
 int virtio_gpu_detach_status_page(struct virtio_gpu_device *vgdev);
 void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev,
 			    struct virtio_gpu_output *output);
 int virtio_gpu_cmd_get_display_info(struct virtio_gpu_device *vgdev);
 void virtio_gpu_cmd_resource_inval_backing(struct virtio_gpu_device *vgdev,
 					   uint32_t resource_id);
 int virtio_gpu_cmd_get_capset_info(struct virtio_gpu_device *vgdev, int idx);
 int virtio_gpu_cmd_get_capset(struct virtio_gpu_device *vgdev,
 			      int idx, int version,
 			      struct virtio_gpu_drv_cap_cache **cache_p);
 void virtio_gpu_cmd_context_create(struct virtio_gpu_device *vgdev, uint32_t id,
 				   uint32_t nlen, const char *name);
 void virtio_gpu_cmd_context_destroy(struct virtio_gpu_device *vgdev,
 				    uint32_t id);
 void virtio_gpu_cmd_context_attach_resource(struct virtio_gpu_device *vgdev,
 					    uint32_t ctx_id,
 					    uint32_t resource_id);
 void virtio_gpu_cmd_context_detach_resource(struct virtio_gpu_device *vgdev,
 					    uint32_t ctx_id,
 					    uint32_t resource_id);
 void virtio_gpu_cmd_submit(struct virtio_gpu_device *vgdev,
 			   void *data, uint32_t data_size,
 			   uint32_t ctx_id, struct virtio_gpu_fence **fence);
 void virtio_gpu_cmd_transfer_from_host_3d(struct virtio_gpu_device *vgdev,
 					  uint32_t resource_id, uint32_t ctx_id,
 					  uint64_t offset, uint32_t level,
 					  struct virtio_gpu_box *box,
 					  struct virtio_gpu_fence **fence);
 void virtio_gpu_cmd_transfer_to_host_3d(struct virtio_gpu_device *vgdev,
 					uint32_t resource_id, uint32_t ctx_id,
 					uint64_t offset, uint32_t level,
 					struct virtio_gpu_box *box,
 					struct virtio_gpu_fence **fence);
 void
 virtio_gpu_cmd_resource_create_3d(struct virtio_gpu_device *vgdev,
 				  struct virtio_gpu_resource_create_3d *rc_3d,
 				  struct virtio_gpu_fence **fence);
 void virtio_gpu_ctrl_ack(struct virtqueue *vq);
 void virtio_gpu_cursor_ack(struct virtqueue *vq);
 void virtio_gpu_fence_ack(struct virtqueue *vq);
 void virtio_gpu_dequeue_ctrl_func(struct work_struct *work);
 void virtio_gpu_dequeue_cursor_func(struct work_struct *work);
 void virtio_gpu_dequeue_fence_func(struct work_struct *work);

 /* virtio_gpu_display.c */
 int virtio_gpu_framebuffer_init(struct drm_device *dev,
 				struct virtio_gpu_framebuffer *vgfb,
 				struct drm_mode_fb_cmd2 *mode_cmd,
 				struct drm_gem_object *obj);
 int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev);
 void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev);

 /* virtio_gpu_plane.c */
 struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
 					int index);

 /* virtio_gpu_ttm.c */
 int virtio_gpu_ttm_init(struct virtio_gpu_device *vgdev);
 void virtio_gpu_ttm_fini(struct virtio_gpu_device *vgdev);
 int virtio_gpu_mmap(struct file *filp, struct vm_area_struct *vma);

 /* virtio_gpu_fence.c */
 int virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
 			  struct virtio_gpu_ctrl_hdr *cmd_hdr,
 			  struct virtio_gpu_fence **fence);
 void virtio_gpu_fence_event_process(struct virtio_gpu_device *vdev,
 				    u64 last_seq);

 /* virtio_gpu_object */
 int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
 			     unsigned long size, bool kernel, bool pinned,
 			     struct virtio_gpu_object **bo_ptr);
 int virtio_gpu_object_kmap(struct virtio_gpu_object *bo, void **ptr);
 int virtio_gpu_object_get_sg_table(struct virtio_gpu_device *qdev,
 				   struct virtio_gpu_object *bo);
 void virtio_gpu_object_free_sg_table(struct virtio_gpu_object *bo);
 int virtio_gpu_object_wait(struct virtio_gpu_object *bo, bool no_wait);

 /* virtgpu_prime.c */
 int virtgpu_gem_prime_pin(struct drm_gem_object *obj);
 void virtgpu_gem_prime_unpin(struct drm_gem_object *obj);
 struct sg_table *virtgpu_gem_prime_get_sg_table(struct drm_gem_object *obj);
 struct drm_gem_object *virtgpu_gem_prime_import_sg_table(
         struct drm_device *dev, struct dma_buf_attachment *attach,
         struct sg_table *sgt);
 void *virtgpu_gem_prime_vmap(struct drm_gem_object *obj);
 void virtgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
 int virtgpu_gem_prime_mmap(struct drm_gem_object *obj,
                                 struct vm_area_struct *vma);

 static inline struct virtio_gpu_object*
 virtio_gpu_object_ref(struct virtio_gpu_object *bo)
 {
 	ttm_bo_reference(&bo->tbo);
 	return bo;
 }

 static inline void virtio_gpu_object_unref(struct virtio_gpu_object **bo)
 {
 	struct ttm_buffer_object *tbo;

 	if ((*bo) == NULL)
 		return;
 	tbo = &((*bo)->tbo);
 	ttm_bo_unref(&tbo);
 	if (tbo == NULL)
 		*bo = NULL;
 }

 static inline u64 virtio_gpu_object_mmap_offset(struct virtio_gpu_object *bo)
 {
 	return drm_vma_node_offset_addr(&bo->tbo.vma_node);
 }

 static inline int virtio_gpu_object_reserve(struct virtio_gpu_object *bo,
 					 bool no_wait)
 {
 	int r;

 	r = ttm_bo_reserve(&bo->tbo, true, no_wait, false, NULL);
 	if (unlikely(r != 0)) {
 		if (r != -ERESTARTSYS) {
 			struct virtio_gpu_device *qdev =
 				bo->gem_base.dev->dev_private;
 			dev_err(qdev->dev, "%p reserve failed\n", bo);
 		}
 		return r;
 	}
 	return 0;
 }

 static inline void virtio_gpu_object_unreserve(struct virtio_gpu_object *bo)
 {
 	ttm_bo_unreserve(&bo->tbo);
 }

 /* virgl debufs */
 int virtio_gpu_debugfs_init(struct drm_minor *minor);
 void virtio_gpu_debugfs_takedown(struct drm_minor *minor);

 #endif
	/*
	* Copyright (C) 2015 Red Hat, Inc.
	* All Rights Reserved.
	*
	* Permission is hereby granted, free of charge, to any person obtaining
	* a copy of this software and associated documentation files (the
	* "Software"), to deal in the Software without restriction, including
	* without limitation the rights to use, copy, modify, merge, publish,
	* distribute, sublicense, and/or sell copies of the Software, and to
	* permit persons to whom the Software is furnished to do so, subject to
	* the following conditions:
	*
	* The above copyright notice and this permission notice (including the
	* next paragraph) shall be included in all copies or substantial
	* portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
	* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
	* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
	* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
	* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	*/

	#ifndef VIRTIO_DRV_H
	#define VIRTIO_DRV_H

	#include <linux/virtio.h>
	#include <linux/virtio_ids.h>
	#include <linux/virtio_config.h>
	#include <linux/virtio_gpu.h>

	#include <drm/drmP.h>
	#include <drm/drm_gem.h>
	#include <drm/drm_crtc_helper.h>
	#include <ttm/ttm_bo_api.h>
	#include <ttm/ttm_bo_driver.h>
	#include <ttm/ttm_placement.h>
	#include <ttm/ttm_module.h>

	#define DRIVER_NAME "virtio_gpu"
	#define DRIVER_DESC "virtio GPU"
	#define DRIVER_DATE "0"

	#define DRIVER_MAJOR 0
	#define DRIVER_MINOR 0
	#define DRIVER_PATCHLEVEL 1

	/* virtgpu_drm_bus.c */
	int drm_virtio_set_busid(struct drm_device dev, struct drm_master master);
	int drm_virtio_init(struct drm_driver driver, struct virtio_device vdev);

	struct virtio_gpu_object {
	struct drm_gem_object gem_base;
	uint32_t hw_res_handle;

	struct sg_table *pages;
	void *vmap;
	bool dumb;
	struct ttm_place placement_code;
	struct ttm_placement placement;
	struct ttm_buffer_object tbo;
	struct ttm_bo_kmap_obj kmap;
	};
	#define gem_to_virtio_gpu_obj(gobj) \
	container_of((gobj), struct virtio_gpu_object, gem_base)

	struct virtio_gpu_vbuffer;
	struct virtio_gpu_device;

	typedef void (virtio_gpu_resp_cb)(struct virtio_gpu_device vgdev,
	struct virtio_gpu_vbuffer *vbuf);

	struct virtio_gpu_fence_driver {
	atomic64_t last_seq;
	uint64_t sync_seq;
	struct list_head fences;
	spinlock_t lock;
	};

	struct virtio_gpu_fence {
	struct fence f;
	struct virtio_gpu_fence_driver *drv;
	struct list_head node;
	uint64_t seq;
	};
	#define to_virtio_fence(x) \
	container_of(x, struct virtio_gpu_fence, f)

	struct virtio_gpu_vbuffer {
	char *buf;
	int size;

	void *data_buf;
	uint32_t data_size;

	char *resp_buf;
	int resp_size;

	virtio_gpu_resp_cb resp_cb;

	struct list_head list;
	};

	struct virtio_gpu_output {
	int index;
	struct drm_crtc crtc;
	struct drm_connector conn;
	struct drm_encoder enc;
	struct virtio_gpu_display_one info;
	struct virtio_gpu_update_cursor cursor;
	int cur_x;
	int cur_y;
	};
	#define drm_crtc_to_virtio_gpu_output(x) \
	container_of(x, struct virtio_gpu_output, crtc)
	#define drm_connector_to_virtio_gpu_output(x) \
	container_of(x, struct virtio_gpu_output, conn)
	#define drm_encoder_to_virtio_gpu_output(x) \
	container_of(x, struct virtio_gpu_output, enc)

	struct virtio_gpu_framebuffer {
	struct drm_framebuffer base;
	struct drm_gem_object *obj;
	int x1, y1, x2, y2; /* dirty rect */
	spinlock_t dirty_lock;
	uint32_t hw_res_handle;
	};
	#define to_virtio_gpu_framebuffer(x) \
	container_of(x, struct virtio_gpu_framebuffer, base)

	struct virtio_gpu_mman {
	struct ttm_bo_global_ref bo_global_ref;
	struct drm_global_reference mem_global_ref;
	bool mem_global_referenced;
	struct ttm_bo_device bdev;
	};

	struct virtio_gpu_fbdev;

	struct virtio_gpu_queue {
	struct virtqueue *vq;
	spinlock_t qlock;
	wait_queue_head_t ack_queue;
	struct work_struct dequeue_work;
	};

	struct virtio_gpu_drv_capset {
	uint32_t id;
	uint32_t max_version;
	uint32_t max_size;
	};

	struct virtio_gpu_drv_cap_cache {
	struct list_head head;
	void *caps_cache;
	uint32_t id;
	uint32_t version;
	uint32_t size;
	atomic_t is_valid;
	};

	struct virtio_gpu_device {
	struct device *dev;
	struct drm_device *ddev;

	struct virtio_device *vdev;

	struct virtio_gpu_mman mman;

	/* pointer to fbdev info structure */
	struct virtio_gpu_fbdev *vgfbdev;
	struct virtio_gpu_output outputs[VIRTIO_GPU_MAX_SCANOUTS];
	uint32_t num_scanouts;

	struct virtio_gpu_queue ctrlq;
	struct virtio_gpu_queue cursorq;
	struct list_head free_vbufs;
	spinlock_t free_vbufs_lock;
	void *vbufs;
	bool vqs_ready;

	struct idr resource_idr;
	spinlock_t resource_idr_lock;

	wait_queue_head_t resp_wq;
	/* current display info */
	spinlock_t display_info_lock;
	bool display_info_pending;

	struct virtio_gpu_fence_driver fence_drv;

	struct idr ctx_id_idr;
	spinlock_t ctx_id_idr_lock;

	bool has_virgl_3d;

	struct work_struct config_changed_work;

	struct virtio_gpu_drv_capset *capsets;
	uint32_t num_capsets;
	struct list_head cap_cache;
	};

	struct virtio_gpu_fpriv {
	uint32_t ctx_id;
	};

	/* virtio_ioctl.c */
	#define DRM_VIRTIO_NUM_IOCTLS 10
	extern struct drm_ioctl_desc virtio_gpu_ioctls[DRM_VIRTIO_NUM_IOCTLS];

	/* virtio_kms.c */
	int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags);
	int virtio_gpu_driver_unload(struct drm_device *dev);
	int virtio_gpu_driver_open(struct drm_device dev, struct drm_file file);
	void virtio_gpu_driver_postclose(struct drm_device dev, struct drm_file file);

	/* virtio_gem.c */
	void virtio_gpu_gem_free_object(struct drm_gem_object *gem_obj);
	int virtio_gpu_gem_init(struct virtio_gpu_device *vgdev);
	void virtio_gpu_gem_fini(struct virtio_gpu_device *vgdev);
	int virtio_gpu_gem_create(struct drm_file *file,
	struct drm_device *dev,
	uint64_t size,
	struct drm_gem_object **obj_p,
	uint32_t *handle_p);
	int virtio_gpu_gem_object_open(struct drm_gem_object *obj,
	struct drm_file *file);
	void virtio_gpu_gem_object_close(struct drm_gem_object *obj,
	struct drm_file *file);
	struct virtio_gpu_object virtio_gpu_alloc_object(struct drm_device dev,
	size_t size, bool kernel,
	bool pinned);
	int virtio_gpu_mode_dumb_create(struct drm_file *file_priv,
	struct drm_device *dev,
	struct drm_mode_create_dumb *args);
	int virtio_gpu_mode_dumb_destroy(struct drm_file *file_priv,
	struct drm_device *dev,
	uint32_t handle);
	int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
	struct drm_device *dev,
	uint32_t handle, uint64_t *offset_p);

	/* virtio_fb */
	#define VIRTIO_GPUFB_CONN_LIMIT 1
	int virtio_gpu_fbdev_init(struct virtio_gpu_device *vgdev);
	void virtio_gpu_fbdev_fini(struct virtio_gpu_device *vgdev);
	int virtio_gpu_surface_dirty(struct virtio_gpu_framebuffer *qfb,
	struct drm_clip_rect *clips,
	unsigned num_clips);
	/* virtio vg */
	int virtio_gpu_alloc_vbufs(struct virtio_gpu_device *vgdev);
	void virtio_gpu_free_vbufs(struct virtio_gpu_device *vgdev);
	void virtio_gpu_resource_id_get(struct virtio_gpu_device *vgdev,
	uint32_t *resid);
	void virtio_gpu_resource_id_put(struct virtio_gpu_device *vgdev, uint32_t id);
	void virtio_gpu_cmd_create_resource(struct virtio_gpu_device *vgdev,
	uint32_t resource_id,
	uint32_t format,
	uint32_t width,
	uint32_t height);
	void virtio_gpu_cmd_unref_resource(struct virtio_gpu_device *vgdev,
	uint32_t resource_id);
	void virtio_gpu_cmd_transfer_to_host_2d(struct virtio_gpu_device *vgdev,
	uint32_t resource_id, uint64_t offset,
	__le32 width, __le32 height,
	__le32 x, __le32 y,
	struct virtio_gpu_fence **fence);
	void virtio_gpu_cmd_resource_flush(struct virtio_gpu_device *vgdev,
	uint32_t resource_id,
	uint32_t x, uint32_t y,
	uint32_t width, uint32_t height);
	void virtio_gpu_cmd_set_scanout(struct virtio_gpu_device *vgdev,
	uint32_t scanout_id, uint32_t resource_id,
	uint32_t width, uint32_t height,
	uint32_t x, uint32_t y);
	int virtio_gpu_object_attach(struct virtio_gpu_device *vgdev,
	struct virtio_gpu_object *obj,
	uint32_t resource_id,
	struct virtio_gpu_fence **fence);
	int virtio_gpu_attach_status_page(struct virtio_gpu_device *vgdev);
	int virtio_gpu_detach_status_page(struct virtio_gpu_device *vgdev);
	void virtio_gpu_cursor_ping(struct virtio_gpu_device *vgdev,
	struct virtio_gpu_output *output);
	int virtio_gpu_cmd_get_display_info(struct virtio_gpu_device *vgdev);
	void virtio_gpu_cmd_resource_inval_backing(struct virtio_gpu_device *vgdev,
	uint32_t resource_id);
	int virtio_gpu_cmd_get_capset_info(struct virtio_gpu_device *vgdev, int idx);
	int virtio_gpu_cmd_get_capset(struct virtio_gpu_device *vgdev,
	int idx, int version,
	struct virtio_gpu_drv_cap_cache **cache_p);
	void virtio_gpu_cmd_context_create(struct virtio_gpu_device *vgdev, uint32_t id,
	uint32_t nlen, const char *name);
	void virtio_gpu_cmd_context_destroy(struct virtio_gpu_device *vgdev,
	uint32_t id);
	void virtio_gpu_cmd_context_attach_resource(struct virtio_gpu_device *vgdev,
	uint32_t ctx_id,
	uint32_t resource_id);
	void virtio_gpu_cmd_context_detach_resource(struct virtio_gpu_device *vgdev,
	uint32_t ctx_id,
	uint32_t resource_id);
	void virtio_gpu_cmd_submit(struct virtio_gpu_device *vgdev,
	void *data, uint32_t data_size,
	uint32_t ctx_id, struct virtio_gpu_fence **fence);
	void virtio_gpu_cmd_transfer_from_host_3d(struct virtio_gpu_device *vgdev,
	uint32_t resource_id, uint32_t ctx_id,
	uint64_t offset, uint32_t level,
	struct virtio_gpu_box *box,
	struct virtio_gpu_fence **fence);
	void virtio_gpu_cmd_transfer_to_host_3d(struct virtio_gpu_device *vgdev,
	uint32_t resource_id, uint32_t ctx_id,
	uint64_t offset, uint32_t level,
	struct virtio_gpu_box *box,
	struct virtio_gpu_fence **fence);
	void
	virtio_gpu_cmd_resource_create_3d(struct virtio_gpu_device *vgdev,
	struct virtio_gpu_resource_create_3d *rc_3d,
	struct virtio_gpu_fence **fence);
	void virtio_gpu_ctrl_ack(struct virtqueue *vq);
	void virtio_gpu_cursor_ack(struct virtqueue *vq);
	void virtio_gpu_fence_ack(struct virtqueue *vq);
	void virtio_gpu_dequeue_ctrl_func(struct work_struct *work);
	void virtio_gpu_dequeue_cursor_func(struct work_struct *work);
	void virtio_gpu_dequeue_fence_func(struct work_struct *work);

	/* virtio_gpu_display.c */
	int virtio_gpu_framebuffer_init(struct drm_device *dev,
	struct virtio_gpu_framebuffer *vgfb,
	struct drm_mode_fb_cmd2 *mode_cmd,
	struct drm_gem_object *obj);
	int virtio_gpu_modeset_init(struct virtio_gpu_device *vgdev);
	void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev);

	/* virtio_gpu_plane.c */
	struct drm_plane virtio_gpu_plane_init(struct virtio_gpu_device vgdev,
	int index);

	/* virtio_gpu_ttm.c */
	int virtio_gpu_ttm_init(struct virtio_gpu_device *vgdev);
	void virtio_gpu_ttm_fini(struct virtio_gpu_device *vgdev);
	int virtio_gpu_mmap(struct file filp, struct vm_area_struct vma);

	/* virtio_gpu_fence.c */
	int virtio_gpu_fence_emit(struct virtio_gpu_device *vgdev,
	struct virtio_gpu_ctrl_hdr *cmd_hdr,
	struct virtio_gpu_fence **fence);
	void virtio_gpu_fence_event_process(struct virtio_gpu_device *vdev,
	u64 last_seq);

	/* virtio_gpu_object */
	int virtio_gpu_object_create(struct virtio_gpu_device *vgdev,
	unsigned long size, bool kernel, bool pinned,
	struct virtio_gpu_object **bo_ptr);
	int virtio_gpu_object_kmap(struct virtio_gpu_object bo, void *ptr);
	int virtio_gpu_object_get_sg_table(struct virtio_gpu_device *qdev,
	struct virtio_gpu_object *bo);
	void virtio_gpu_object_free_sg_table(struct virtio_gpu_object *bo);
	int virtio_gpu_object_wait(struct virtio_gpu_object *bo, bool no_wait);

	/* virtgpu_prime.c */
	int virtgpu_gem_prime_pin(struct drm_gem_object *obj);
	void virtgpu_gem_prime_unpin(struct drm_gem_object *obj);
	struct sg_table virtgpu_gem_prime_get_sg_table(struct drm_gem_object obj);
	struct drm_gem_object *virtgpu_gem_prime_import_sg_table(
	struct drm_device dev, struct dma_buf_attachment attach,
	struct sg_table *sgt);
	void virtgpu_gem_prime_vmap(struct drm_gem_object obj);
	void virtgpu_gem_prime_vunmap(struct drm_gem_object obj, void vaddr);
	int virtgpu_gem_prime_mmap(struct drm_gem_object *obj,
	struct vm_area_struct *vma);

	static inline struct virtio_gpu_object*
	virtio_gpu_object_ref(struct virtio_gpu_object *bo)
	{
	ttm_bo_reference(&bo->tbo);
	return bo;
	}

	static inline void virtio_gpu_object_unref(struct virtio_gpu_object **bo)
	{
	struct ttm_buffer_object *tbo;

	if ((*bo) == NULL)
	return;
	tbo = &((*bo)->tbo);
	ttm_bo_unref(&tbo);
	if (tbo == NULL)
	*bo = NULL;
	}

	static inline u64 virtio_gpu_object_mmap_offset(struct virtio_gpu_object *bo)
	{
	return drm_vma_node_offset_addr(&bo->tbo.vma_node);
	}

	static inline int virtio_gpu_object_reserve(struct virtio_gpu_object *bo,
	bool no_wait)
	{
	int r;

	r = ttm_bo_reserve(&bo->tbo, true, no_wait, false, NULL);
	if (unlikely(r != 0)) {
	if (r != -ERESTARTSYS) {
	struct virtio_gpu_device *qdev =
	bo->gem_base.dev->dev_private;
	dev_err(qdev->dev, "%p reserve failed\n", bo);
	}
	return r;
	}
	return 0;
	}

	static inline void virtio_gpu_object_unreserve(struct virtio_gpu_object *bo)
	{
	ttm_bo_unreserve(&bo->tbo);
	}

	/* virgl debufs */
	int virtio_gpu_debugfs_init(struct drm_minor *minor);
	void virtio_gpu_debugfs_takedown(struct drm_minor *minor);

	#endif