drivers/gpu/drm/vmwgfx/vmwgfx_bo.h - linux - Git at Google

 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
 /**************************************************************************
  *
  * Copyright 2023 VMware, Inc., Palo Alto, CA., USA
  *
  * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
  * THE COPYRIGHT HOLDERS, AUTHORS 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 VMWGFX_BO_H
 #define VMWGFX_BO_H

 #include "device_include/svga_reg.h"

 #include <drm/ttm/ttm_bo.h>
 #include <drm/ttm/ttm_placement.h>

 #include <linux/rbtree_types.h>
 #include <linux/types.h>

 struct vmw_bo_dirty;
 struct vmw_fence_obj;
 struct vmw_private;
 struct vmw_resource;

 enum vmw_bo_domain {
 	VMW_BO_DOMAIN_SYS           = BIT(0),
 	VMW_BO_DOMAIN_WAITABLE_SYS  = BIT(1),
 	VMW_BO_DOMAIN_VRAM          = BIT(2),
 	VMW_BO_DOMAIN_GMR           = BIT(3),
 	VMW_BO_DOMAIN_MOB           = BIT(4),
 };

 struct vmw_bo_params {
 	u32 domain;
 	u32 busy_domain;
 	enum ttm_bo_type bo_type;
 	size_t size;
 	bool pin;
 };

 /**
  * struct vmw_bo - TTM buffer object with vmwgfx additions
  * @tbo: The TTM buffer object
  * @placement: The preferred placement for this buffer object
  * @places: The chosen places for the preferred placement.
  * @busy_places: Chosen busy places for the preferred placement
  * @map: Kmap object for semi-persistent mappings
  * @res_tree: RB tree of resources using this buffer object as a backing MOB
  * @res_prios: Eviction priority counts for attached resources
  * @cpu_writers: Number of synccpu write grabs. Protected by reservation when
  * increased. May be decreased without reservation.
  * @dx_query_ctx: DX context if this buffer object is used as a DX query MOB
  * @dirty: structure for user-space dirty-tracking
  */
 struct vmw_bo {
 	struct ttm_buffer_object tbo;

 	struct ttm_placement placement;
 	struct ttm_place places[5];
 	struct ttm_place busy_places[5];

 	/* Protected by reservation */
 	struct ttm_bo_kmap_obj map;

 	struct rb_root res_tree;
 	u32 res_prios[TTM_MAX_BO_PRIORITY];

 	atomic_t cpu_writers;
 	/* Not ref-counted.  Protected by binding_mutex */
 	struct vmw_resource *dx_query_ctx;
 	struct vmw_bo_dirty *dirty;
 };

 void vmw_bo_placement_set(struct vmw_bo *bo, u32 domain, u32 busy_domain);
 void vmw_bo_placement_set_default_accelerated(struct vmw_bo *bo);

 int vmw_bo_create(struct vmw_private *dev_priv,
 		  struct vmw_bo_params *params,
 		  struct vmw_bo **p_bo);

 int vmw_bo_unref_ioctl(struct drm_device *dev, void *data,
 		       struct drm_file *file_priv);

 int vmw_bo_pin_in_vram(struct vmw_private *dev_priv,
 		       struct vmw_bo *buf,
 		       bool interruptible);
 int vmw_bo_pin_in_vram_or_gmr(struct vmw_private *dev_priv,
 			      struct vmw_bo *buf,
 			      bool interruptible);
 int vmw_bo_pin_in_start_of_vram(struct vmw_private *vmw_priv,
 				struct vmw_bo *bo,
 				bool interruptible);
 void vmw_bo_pin_reserved(struct vmw_bo *bo, bool pin);
 int vmw_bo_unpin(struct vmw_private *vmw_priv,
 		 struct vmw_bo *bo,
 		 bool interruptible);

 void vmw_bo_get_guest_ptr(const struct ttm_buffer_object *buf,
 			  SVGAGuestPtr *ptr);
 int vmw_user_bo_synccpu_ioctl(struct drm_device *dev, void *data,
 			      struct drm_file *file_priv);
 void vmw_bo_fence_single(struct ttm_buffer_object *bo,
 			 struct vmw_fence_obj *fence);

 void *vmw_bo_map_and_cache(struct vmw_bo *vbo);
 void vmw_bo_unmap(struct vmw_bo *vbo);

 void vmw_bo_move_notify(struct ttm_buffer_object *bo,
 			struct ttm_resource *mem);
 void vmw_bo_swap_notify(struct ttm_buffer_object *bo);

 int vmw_user_bo_lookup(struct drm_file *filp,
 		       u32 handle,
 		       struct vmw_bo **out);
 /**
  * vmw_bo_adjust_prio - Adjust the buffer object eviction priority
  * according to attached resources
  * @vbo: The struct vmw_bo
  */
 static inline void vmw_bo_prio_adjust(struct vmw_bo *vbo)
 {
 	int i = ARRAY_SIZE(vbo->res_prios);

 	while (i--) {
 		if (vbo->res_prios[i]) {
 			vbo->tbo.priority = i;
 			return;
 		}
 	}

 	vbo->tbo.priority = 3;
 }

 /**
  * vmw_bo_prio_add - Notify a buffer object of a newly attached resource
  * eviction priority
  * @vbo: The struct vmw_bo
  * @prio: The resource priority
  *
  * After being notified, the code assigns the highest resource eviction priority
  * to the backing buffer object (mob).
  */
 static inline void vmw_bo_prio_add(struct vmw_bo *vbo, int prio)
 {
 	if (vbo->res_prios[prio]++ == 0)
 		vmw_bo_prio_adjust(vbo);
 }

 /**
  * vmw_bo_used_prio_del - Notify a buffer object of a resource with a certain
  * priority being removed
  * @vbo: The struct vmw_bo
  * @prio: The resource priority
  *
  * After being notified, the code assigns the highest resource eviction priority
  * to the backing buffer object (mob).
  */
 static inline void vmw_bo_prio_del(struct vmw_bo *vbo, int prio)
 {
 	if (--vbo->res_prios[prio] == 0)
 		vmw_bo_prio_adjust(vbo);
 }

 static inline void vmw_bo_unreference(struct vmw_bo **buf)
 {
 	struct vmw_bo *tmp_buf = *buf;

 	*buf = NULL;
 	if (tmp_buf)
 		ttm_bo_put(&tmp_buf->tbo);
 }

 static inline struct vmw_bo *vmw_bo_reference(struct vmw_bo *buf)
 {
 	ttm_bo_get(&buf->tbo);
 	return buf;
 }

 static inline struct vmw_bo *to_vmw_bo(struct drm_gem_object *gobj)
 {
 	return container_of((gobj), struct vmw_bo, tbo.base);
 }

 #endif // VMWGFX_BO_H
	/* SPDX-License-Identifier: GPL-2.0 OR MIT */
	/**************************************************************************
	*
	* Copyright 2023 VMware, Inc., Palo Alto, CA., USA
	*
	* 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
	* THE COPYRIGHT HOLDERS, AUTHORS 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 VMWGFX_BO_H
	#define VMWGFX_BO_H

	#include "device_include/svga_reg.h"

	#include <drm/ttm/ttm_bo.h>
	#include <drm/ttm/ttm_placement.h>

	#include <linux/rbtree_types.h>
	#include <linux/types.h>

	struct vmw_bo_dirty;
	struct vmw_fence_obj;
	struct vmw_private;
	struct vmw_resource;

	enum vmw_bo_domain {
	VMW_BO_DOMAIN_SYS = BIT(0),
	VMW_BO_DOMAIN_WAITABLE_SYS = BIT(1),
	VMW_BO_DOMAIN_VRAM = BIT(2),
	VMW_BO_DOMAIN_GMR = BIT(3),
	VMW_BO_DOMAIN_MOB = BIT(4),
	};

	struct vmw_bo_params {
	u32 domain;
	u32 busy_domain;
	enum ttm_bo_type bo_type;
	size_t size;
	bool pin;
	};

	/**
	* struct vmw_bo - TTM buffer object with vmwgfx additions
	* @tbo: The TTM buffer object
	* @placement: The preferred placement for this buffer object
	* @places: The chosen places for the preferred placement.
	* @busy_places: Chosen busy places for the preferred placement
	* @map: Kmap object for semi-persistent mappings
	* @res_tree: RB tree of resources using this buffer object as a backing MOB
	* @res_prios: Eviction priority counts for attached resources
	* @cpu_writers: Number of synccpu write grabs. Protected by reservation when
	* increased. May be decreased without reservation.
	* @dx_query_ctx: DX context if this buffer object is used as a DX query MOB
	* @dirty: structure for user-space dirty-tracking
	*/
	struct vmw_bo {
	struct ttm_buffer_object tbo;

	struct ttm_placement placement;
	struct ttm_place places[5];
	struct ttm_place busy_places[5];

	/* Protected by reservation */
	struct ttm_bo_kmap_obj map;

	struct rb_root res_tree;
	u32 res_prios[TTM_MAX_BO_PRIORITY];

	atomic_t cpu_writers;
	/* Not ref-counted. Protected by binding_mutex */
	struct vmw_resource *dx_query_ctx;
	struct vmw_bo_dirty *dirty;
	};

	void vmw_bo_placement_set(struct vmw_bo *bo, u32 domain, u32 busy_domain);
	void vmw_bo_placement_set_default_accelerated(struct vmw_bo *bo);

	int vmw_bo_create(struct vmw_private *dev_priv,
	struct vmw_bo_params *params,
	struct vmw_bo **p_bo);

	int vmw_bo_unref_ioctl(struct drm_device dev, void data,
	struct drm_file *file_priv);

	int vmw_bo_pin_in_vram(struct vmw_private *dev_priv,
	struct vmw_bo *buf,
	bool interruptible);
	int vmw_bo_pin_in_vram_or_gmr(struct vmw_private *dev_priv,
	struct vmw_bo *buf,
	bool interruptible);
	int vmw_bo_pin_in_start_of_vram(struct vmw_private *vmw_priv,
	struct vmw_bo *bo,
	bool interruptible);
	void vmw_bo_pin_reserved(struct vmw_bo *bo, bool pin);
	int vmw_bo_unpin(struct vmw_private *vmw_priv,
	struct vmw_bo *bo,
	bool interruptible);

	void vmw_bo_get_guest_ptr(const struct ttm_buffer_object *buf,
	SVGAGuestPtr *ptr);
	int vmw_user_bo_synccpu_ioctl(struct drm_device dev, void data,
	struct drm_file *file_priv);
	void vmw_bo_fence_single(struct ttm_buffer_object *bo,
	struct vmw_fence_obj *fence);

	void vmw_bo_map_and_cache(struct vmw_bo vbo);
	void vmw_bo_unmap(struct vmw_bo *vbo);

	void vmw_bo_move_notify(struct ttm_buffer_object *bo,
	struct ttm_resource *mem);
	void vmw_bo_swap_notify(struct ttm_buffer_object *bo);

	int vmw_user_bo_lookup(struct drm_file *filp,
	u32 handle,
	struct vmw_bo **out);
	/**
	* vmw_bo_adjust_prio - Adjust the buffer object eviction priority
	* according to attached resources
	* @vbo: The struct vmw_bo
	*/
	static inline void vmw_bo_prio_adjust(struct vmw_bo *vbo)
	{
	int i = ARRAY_SIZE(vbo->res_prios);

	while (i--) {
	if (vbo->res_prios[i]) {
	vbo->tbo.priority = i;
	return;
	}
	}

	vbo->tbo.priority = 3;
	}

	/**
	* vmw_bo_prio_add - Notify a buffer object of a newly attached resource
	* eviction priority
	* @vbo: The struct vmw_bo
	* @prio: The resource priority
	*
	* After being notified, the code assigns the highest resource eviction priority
	* to the backing buffer object (mob).
	*/
	static inline void vmw_bo_prio_add(struct vmw_bo *vbo, int prio)
	{
	if (vbo->res_prios[prio]++ == 0)
	vmw_bo_prio_adjust(vbo);
	}

	/**
	* vmw_bo_used_prio_del - Notify a buffer object of a resource with a certain
	* priority being removed
	* @vbo: The struct vmw_bo
	* @prio: The resource priority
	*
	* After being notified, the code assigns the highest resource eviction priority
	* to the backing buffer object (mob).
	*/
	static inline void vmw_bo_prio_del(struct vmw_bo *vbo, int prio)
	{
	if (--vbo->res_prios[prio] == 0)
	vmw_bo_prio_adjust(vbo);
	}

	static inline void vmw_bo_unreference(struct vmw_bo **buf)
	{
	struct vmw_bo tmp_buf = buf;

	*buf = NULL;
	if (tmp_buf)
	ttm_bo_put(&tmp_buf->tbo);
	}

	static inline struct vmw_bo vmw_bo_reference(struct vmw_bo buf)
	{
	ttm_bo_get(&buf->tbo);
	return buf;
	}

	static inline struct vmw_bo to_vmw_bo(struct drm_gem_object gobj)
	{
	return container_of((gobj), struct vmw_bo, tbo.base);
	}

	#endif // VMWGFX_BO_H