drivers/gpu/drm/vmwgfx/vmwgfx_streamoutput.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0 OR MIT
 /**************************************************************************
  *
  * Copyright © 2018-2019 VMware, Inc., Palo Alto, CA., USA
  * 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, 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.
  *
  **************************************************************************/

 #include <drm/ttm/ttm_placement.h>

 #include "vmwgfx_drv.h"
 #include "vmwgfx_resource_priv.h"
 #include "vmwgfx_binding.h"

 /**
  * struct vmw_dx_streamoutput - Streamoutput resource metadata.
  * @res: Base resource struct.
  * @ctx: Non-refcounted context to which @res belong.
  * @cotable: Refcounted cotable holding this Streamoutput.
  * @cotable_head: List head for cotable-so_res list.
  * @id: User-space provided identifier.
  * @size: User-space provided mob size.
  * @committed: Whether streamoutput is actually created or pending creation.
  */
 struct vmw_dx_streamoutput {
 	struct vmw_resource res;
 	struct vmw_resource *ctx;
 	struct vmw_resource *cotable;
 	struct list_head cotable_head;
 	u32 id;
 	u32 size;
 	bool committed;
 };

 static int vmw_dx_streamoutput_create(struct vmw_resource *res);
 static int vmw_dx_streamoutput_bind(struct vmw_resource *res,
 				    struct ttm_validate_buffer *val_buf);
 static int vmw_dx_streamoutput_unbind(struct vmw_resource *res, bool readback,
 				      struct ttm_validate_buffer *val_buf);
 static void vmw_dx_streamoutput_commit_notify(struct vmw_resource *res,
 					      enum vmw_cmdbuf_res_state state);

 static size_t vmw_streamoutput_size;

 static const struct vmw_res_func vmw_dx_streamoutput_func = {
 	.res_type = vmw_res_streamoutput,
 	.needs_backup = true,
 	.may_evict = false,
 	.type_name = "DX streamoutput",
 	.backup_placement = &vmw_mob_placement,
 	.create = vmw_dx_streamoutput_create,
 	.destroy = NULL, /* Command buffer managed resource. */
 	.bind = vmw_dx_streamoutput_bind,
 	.unbind = vmw_dx_streamoutput_unbind,
 	.commit_notify = vmw_dx_streamoutput_commit_notify,
 };

 static inline struct vmw_dx_streamoutput *
 vmw_res_to_dx_streamoutput(struct vmw_resource *res)
 {
 	return container_of(res, struct vmw_dx_streamoutput, res);
 }

 /**
  * vmw_dx_streamoutput_unscrub - Reattach the MOB to streamoutput.
  * @res: The streamoutput resource.
  *
  * Return: 0 on success, negative error code on failure.
  */
 static int vmw_dx_streamoutput_unscrub(struct vmw_resource *res)
 {
 	struct vmw_dx_streamoutput *so = vmw_res_to_dx_streamoutput(res);
 	struct vmw_private *dev_priv = res->dev_priv;
 	struct {
 		SVGA3dCmdHeader header;
 		SVGA3dCmdDXBindStreamOutput body;
 	} *cmd;

 	if (!list_empty(&so->cotable_head) || !so->committed )
 		return 0;

 	cmd = VMW_FIFO_RESERVE_DX(dev_priv, sizeof(*cmd), so->ctx->id);
 	if (!cmd)
 		return -ENOMEM;

 	cmd->header.id = SVGA_3D_CMD_DX_BIND_STREAMOUTPUT;
 	cmd->header.size = sizeof(cmd->body);
 	cmd->body.soid = so->id;
 	cmd->body.mobid = res->backup->base.mem.start;
 	cmd->body.offsetInBytes = res->backup_offset;
 	cmd->body.sizeInBytes = so->size;
 	vmw_fifo_commit(dev_priv, sizeof(*cmd));

 	vmw_cotable_add_resource(so->cotable, &so->cotable_head);

 	return 0;
 }

 static int vmw_dx_streamoutput_create(struct vmw_resource *res)
 {
 	struct vmw_private *dev_priv = res->dev_priv;
 	struct vmw_dx_streamoutput *so = vmw_res_to_dx_streamoutput(res);
 	int ret = 0;

 	WARN_ON_ONCE(!so->committed);

 	if (vmw_resource_mob_attached(res)) {
 		mutex_lock(&dev_priv->binding_mutex);
 		ret = vmw_dx_streamoutput_unscrub(res);
 		mutex_unlock(&dev_priv->binding_mutex);
 	}

 	res->id = so->id;

 	return ret;
 }

 static int vmw_dx_streamoutput_bind(struct vmw_resource *res,
 				    struct ttm_validate_buffer *val_buf)
 {
 	struct vmw_private *dev_priv = res->dev_priv;
 	struct ttm_buffer_object *bo = val_buf->bo;
 	int ret;

 	if (WARN_ON(bo->mem.mem_type != VMW_PL_MOB))
 		return -EINVAL;

 	mutex_lock(&dev_priv->binding_mutex);
 	ret = vmw_dx_streamoutput_unscrub(res);
 	mutex_unlock(&dev_priv->binding_mutex);

 	return ret;
 }

 /**
  * vmw_dx_streamoutput_scrub - Unbind the MOB from streamoutput.
  * @res: The streamoutput resource.
  *
  * Return: 0 on success, negative error code on failure.
  */
 static int vmw_dx_streamoutput_scrub(struct vmw_resource *res)
 {
 	struct vmw_private *dev_priv = res->dev_priv;
 	struct vmw_dx_streamoutput *so = vmw_res_to_dx_streamoutput(res);
 	struct {
 		SVGA3dCmdHeader header;
 		SVGA3dCmdDXBindStreamOutput body;
 	} *cmd;

 	if (list_empty(&so->cotable_head))
 		return 0;

 	WARN_ON_ONCE(!so->committed);

 	cmd = VMW_FIFO_RESERVE_DX(dev_priv, sizeof(*cmd), so->ctx->id);
 	if (!cmd)
 		return -ENOMEM;

 	cmd->header.id = SVGA_3D_CMD_DX_BIND_STREAMOUTPUT;
 	cmd->header.size = sizeof(cmd->body);
 	cmd->body.soid = res->id;
 	cmd->body.mobid = SVGA3D_INVALID_ID;
 	cmd->body.offsetInBytes = 0;
 	cmd->body.sizeInBytes = so->size;
 	vmw_fifo_commit(dev_priv, sizeof(*cmd));

 	res->id = -1;
 	list_del_init(&so->cotable_head);

 	return 0;
 }

 static int vmw_dx_streamoutput_unbind(struct vmw_resource *res, bool readback,
 				      struct ttm_validate_buffer *val_buf)
 {
 	struct vmw_private *dev_priv = res->dev_priv;
 	struct vmw_fence_obj *fence;
 	int ret;

 	if (WARN_ON(res->backup->base.mem.mem_type != VMW_PL_MOB))
 		return -EINVAL;

 	mutex_lock(&dev_priv->binding_mutex);
 	ret = vmw_dx_streamoutput_scrub(res);
 	mutex_unlock(&dev_priv->binding_mutex);

 	if (ret)
 		return ret;

 	(void) vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL);
 	vmw_bo_fence_single(val_buf->bo, fence);

 	if (fence != NULL)
 		vmw_fence_obj_unreference(&fence);

 	return 0;
 }

 static void vmw_dx_streamoutput_commit_notify(struct vmw_resource *res,
 					   enum vmw_cmdbuf_res_state state)
 {
 	struct vmw_private *dev_priv = res->dev_priv;
 	struct vmw_dx_streamoutput *so = vmw_res_to_dx_streamoutput(res);

 	if (state == VMW_CMDBUF_RES_ADD) {
 		mutex_lock(&dev_priv->binding_mutex);
 		vmw_cotable_add_resource(so->cotable, &so->cotable_head);
 		so->committed = true;
 		res->id = so->id;
 		mutex_unlock(&dev_priv->binding_mutex);
 	} else {
 		mutex_lock(&dev_priv->binding_mutex);
 		list_del_init(&so->cotable_head);
 		so->committed = false;
 		res->id = -1;
 		mutex_unlock(&dev_priv->binding_mutex);
 	}
 }

 /**
  * vmw_dx_streamoutput_lookup - Do a streamoutput resource lookup by user key.
  * @man: Command buffer managed resource manager for current context.
  * @user_key: User-space identifier for lookup.
  *
  * Return: Valid refcounted vmw_resource on success, error pointer on failure.
  */
 struct vmw_resource *
 vmw_dx_streamoutput_lookup(struct vmw_cmdbuf_res_manager *man,
 			   u32 user_key)
 {
 	return vmw_cmdbuf_res_lookup(man, vmw_cmdbuf_res_streamoutput,
 				     user_key);
 }

 static void vmw_dx_streamoutput_res_free(struct vmw_resource *res)
 {
 	struct vmw_private *dev_priv = res->dev_priv;
 	struct vmw_dx_streamoutput *so = vmw_res_to_dx_streamoutput(res);

 	vmw_resource_unreference(&so->cotable);
 	kfree(so);
 	ttm_mem_global_free(vmw_mem_glob(dev_priv), vmw_streamoutput_size);
 }

 static void vmw_dx_streamoutput_hw_destroy(struct vmw_resource *res)
 {
 	/* Destroyed by user-space cmd buf or as part of context takedown. */
 	res->id = -1;
 }

 /**
  * vmw_dx_streamoutput_add - Add a streamoutput as a cmd buf managed resource.
  * @man: Command buffer managed resource manager for current context.
  * @ctx: Pointer to context resource.
  * @user_key: The identifier for this streamoutput.
  * @list: The list of staged command buffer managed resources.
  *
  * Return: 0 on success, negative error code on failure.
  */
 int vmw_dx_streamoutput_add(struct vmw_cmdbuf_res_manager *man,
 			    struct vmw_resource *ctx, u32 user_key,
 			    struct list_head *list)
 {
 	struct vmw_dx_streamoutput *so;
 	struct vmw_resource *res;
 	struct vmw_private *dev_priv = ctx->dev_priv;
 	struct ttm_operation_ctx ttm_opt_ctx = {
 		.interruptible = true,
 		.no_wait_gpu = false
 	};
 	int ret;

 	if (!vmw_streamoutput_size)
 		vmw_streamoutput_size = ttm_round_pot(sizeof(*so));

 	ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
 				   vmw_streamoutput_size, &ttm_opt_ctx);
 	if (ret) {
 		if (ret != -ERESTARTSYS)
 			DRM_ERROR("Out of graphics memory for streamout.\n");
 		return ret;
 	}

 	so = kmalloc(sizeof(*so), GFP_KERNEL);
 	if (!so) {
 		ttm_mem_global_free(vmw_mem_glob(dev_priv),
 				    vmw_streamoutput_size);
 		return -ENOMEM;
 	}

 	res = &so->res;
 	so->ctx = ctx;
 	so->cotable = vmw_resource_reference
 		(vmw_context_cotable(ctx, SVGA_COTABLE_STREAMOUTPUT));
 	so->id = user_key;
 	so->committed = false;
 	INIT_LIST_HEAD(&so->cotable_head);
 	ret = vmw_resource_init(dev_priv, res, true,
 				vmw_dx_streamoutput_res_free,
 				&vmw_dx_streamoutput_func);
 	if (ret)
 		goto out_resource_init;

 	ret = vmw_cmdbuf_res_add(man, vmw_cmdbuf_res_streamoutput, user_key,
 				 res, list);
 	if (ret)
 		goto out_resource_init;

 	res->id = so->id;
 	res->hw_destroy = vmw_dx_streamoutput_hw_destroy;

 out_resource_init:
 	vmw_resource_unreference(&res);

 	return ret;
 }

 /**
  * vmw_dx_streamoutput_set_size - Sets streamoutput mob size in res struct.
  * @res: The streamoutput res for which need to set size.
  * @size: The size provided by user-space to set.
  */
 void vmw_dx_streamoutput_set_size(struct vmw_resource *res, u32 size)
 {
 	struct vmw_dx_streamoutput *so = vmw_res_to_dx_streamoutput(res);

 	so->size = size;
 }

 /**
  * vmw_dx_streamoutput_remove - Stage streamoutput for removal.
  * @man: Command buffer managed resource manager for current context.
  * @user_key: The identifier for this streamoutput.
  * @list: The list of staged command buffer managed resources.
  *
  * Return: 0 on success, negative error code on failure.
  */
 int vmw_dx_streamoutput_remove(struct vmw_cmdbuf_res_manager *man,
 			       u32 user_key,
 			       struct list_head *list)
 {
 	struct vmw_resource *r;

 	return vmw_cmdbuf_res_remove(man, vmw_cmdbuf_res_streamoutput,
 				     (u32)user_key, list, &r);
 }

 /**
  * vmw_dx_streamoutput_cotable_list_scrub - cotable unbind_func callback.
  * @dev_priv: Device private.
  * @list: The list of cotable resources.
  * @readback: Whether the call was part of a readback unbind.
  */
 void vmw_dx_streamoutput_cotable_list_scrub(struct vmw_private *dev_priv,
 					    struct list_head *list,
 					    bool readback)
 {
 	struct vmw_dx_streamoutput *entry, *next;

 	lockdep_assert_held_once(&dev_priv->binding_mutex);

 	list_for_each_entry_safe(entry, next, list, cotable_head) {
 		WARN_ON(vmw_dx_streamoutput_scrub(&entry->res));
 		if (!readback)
 			entry->committed =false;
 	}
 }
	// SPDX-License-Identifier: GPL-2.0 OR MIT
	/**************************************************************************
	*
	* Copyright © 2018-2019 VMware, Inc., Palo Alto, CA., USA
	* 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, 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.
	*
	**************************************************************************/

	#include <drm/ttm/ttm_placement.h>

	#include "vmwgfx_drv.h"
	#include "vmwgfx_resource_priv.h"
	#include "vmwgfx_binding.h"

	/**
	* struct vmw_dx_streamoutput - Streamoutput resource metadata.
	* @res: Base resource struct.
	* @ctx: Non-refcounted context to which @res belong.
	* @cotable: Refcounted cotable holding this Streamoutput.
	* @cotable_head: List head for cotable-so_res list.
	* @id: User-space provided identifier.
	* @size: User-space provided mob size.
	* @committed: Whether streamoutput is actually created or pending creation.
	*/
	struct vmw_dx_streamoutput {
	struct vmw_resource res;
	struct vmw_resource *ctx;
	struct vmw_resource *cotable;
	struct list_head cotable_head;
	u32 id;
	u32 size;
	bool committed;
	};

	static int vmw_dx_streamoutput_create(struct vmw_resource *res);
	static int vmw_dx_streamoutput_bind(struct vmw_resource *res,
	struct ttm_validate_buffer *val_buf);
	static int vmw_dx_streamoutput_unbind(struct vmw_resource *res, bool readback,
	struct ttm_validate_buffer *val_buf);
	static void vmw_dx_streamoutput_commit_notify(struct vmw_resource *res,
	enum vmw_cmdbuf_res_state state);

	static size_t vmw_streamoutput_size;

	static const struct vmw_res_func vmw_dx_streamoutput_func = {
	.res_type = vmw_res_streamoutput,
	.needs_backup = true,
	.may_evict = false,
	.type_name = "DX streamoutput",
	.backup_placement = &vmw_mob_placement,
	.create = vmw_dx_streamoutput_create,
	.destroy = NULL, /* Command buffer managed resource. */
	.bind = vmw_dx_streamoutput_bind,
	.unbind = vmw_dx_streamoutput_unbind,
	.commit_notify = vmw_dx_streamoutput_commit_notify,
	};

	static inline struct vmw_dx_streamoutput *
	vmw_res_to_dx_streamoutput(struct vmw_resource *res)
	{
	return container_of(res, struct vmw_dx_streamoutput, res);
	}

	/**
	* vmw_dx_streamoutput_unscrub - Reattach the MOB to streamoutput.
	* @res: The streamoutput resource.
	*
	* Return: 0 on success, negative error code on failure.
	*/
	static int vmw_dx_streamoutput_unscrub(struct vmw_resource *res)
	{
	struct vmw_dx_streamoutput *so = vmw_res_to_dx_streamoutput(res);
	struct vmw_private *dev_priv = res->dev_priv;
	struct {
	SVGA3dCmdHeader header;
	SVGA3dCmdDXBindStreamOutput body;
	} *cmd;

	if (!list_empty(&so->cotable_head) \|\| !so->committed )
	return 0;

	cmd = VMW_FIFO_RESERVE_DX(dev_priv, sizeof(*cmd), so->ctx->id);
	if (!cmd)
	return -ENOMEM;

	cmd->header.id = SVGA_3D_CMD_DX_BIND_STREAMOUTPUT;
	cmd->header.size = sizeof(cmd->body);
	cmd->body.soid = so->id;
	cmd->body.mobid = res->backup->base.mem.start;
	cmd->body.offsetInBytes = res->backup_offset;
	cmd->body.sizeInBytes = so->size;
	vmw_fifo_commit(dev_priv, sizeof(*cmd));

	vmw_cotable_add_resource(so->cotable, &so->cotable_head);

	return 0;
	}

	static int vmw_dx_streamoutput_create(struct vmw_resource *res)
	{
	struct vmw_private *dev_priv = res->dev_priv;
	struct vmw_dx_streamoutput *so = vmw_res_to_dx_streamoutput(res);
	int ret = 0;

	WARN_ON_ONCE(!so->committed);

	if (vmw_resource_mob_attached(res)) {
	mutex_lock(&dev_priv->binding_mutex);
	ret = vmw_dx_streamoutput_unscrub(res);
	mutex_unlock(&dev_priv->binding_mutex);
	}

	res->id = so->id;

	return ret;
	}

	static int vmw_dx_streamoutput_bind(struct vmw_resource *res,
	struct ttm_validate_buffer *val_buf)
	{
	struct vmw_private *dev_priv = res->dev_priv;
	struct ttm_buffer_object *bo = val_buf->bo;
	int ret;

	if (WARN_ON(bo->mem.mem_type != VMW_PL_MOB))
	return -EINVAL;

	mutex_lock(&dev_priv->binding_mutex);
	ret = vmw_dx_streamoutput_unscrub(res);
	mutex_unlock(&dev_priv->binding_mutex);

	return ret;
	}

	/**
	* vmw_dx_streamoutput_scrub - Unbind the MOB from streamoutput.
	* @res: The streamoutput resource.
	*
	* Return: 0 on success, negative error code on failure.
	*/
	static int vmw_dx_streamoutput_scrub(struct vmw_resource *res)
	{
	struct vmw_private *dev_priv = res->dev_priv;
	struct vmw_dx_streamoutput *so = vmw_res_to_dx_streamoutput(res);
	struct {
	SVGA3dCmdHeader header;
	SVGA3dCmdDXBindStreamOutput body;
	} *cmd;

	if (list_empty(&so->cotable_head))
	return 0;

	WARN_ON_ONCE(!so->committed);

	cmd = VMW_FIFO_RESERVE_DX(dev_priv, sizeof(*cmd), so->ctx->id);
	if (!cmd)
	return -ENOMEM;

	cmd->header.id = SVGA_3D_CMD_DX_BIND_STREAMOUTPUT;
	cmd->header.size = sizeof(cmd->body);
	cmd->body.soid = res->id;
	cmd->body.mobid = SVGA3D_INVALID_ID;
	cmd->body.offsetInBytes = 0;
	cmd->body.sizeInBytes = so->size;
	vmw_fifo_commit(dev_priv, sizeof(*cmd));

	res->id = -1;
	list_del_init(&so->cotable_head);

	return 0;
	}

	static int vmw_dx_streamoutput_unbind(struct vmw_resource *res, bool readback,
	struct ttm_validate_buffer *val_buf)
	{
	struct vmw_private *dev_priv = res->dev_priv;
	struct vmw_fence_obj *fence;
	int ret;

	if (WARN_ON(res->backup->base.mem.mem_type != VMW_PL_MOB))
	return -EINVAL;

	mutex_lock(&dev_priv->binding_mutex);
	ret = vmw_dx_streamoutput_scrub(res);
	mutex_unlock(&dev_priv->binding_mutex);

	if (ret)
	return ret;

	(void) vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL);
	vmw_bo_fence_single(val_buf->bo, fence);

	if (fence != NULL)
	vmw_fence_obj_unreference(&fence);

	return 0;
	}

	static void vmw_dx_streamoutput_commit_notify(struct vmw_resource *res,
	enum vmw_cmdbuf_res_state state)
	{
	struct vmw_private *dev_priv = res->dev_priv;
	struct vmw_dx_streamoutput *so = vmw_res_to_dx_streamoutput(res);

	if (state == VMW_CMDBUF_RES_ADD) {
	mutex_lock(&dev_priv->binding_mutex);
	vmw_cotable_add_resource(so->cotable, &so->cotable_head);
	so->committed = true;
	res->id = so->id;
	mutex_unlock(&dev_priv->binding_mutex);
	} else {
	mutex_lock(&dev_priv->binding_mutex);
	list_del_init(&so->cotable_head);
	so->committed = false;
	res->id = -1;
	mutex_unlock(&dev_priv->binding_mutex);
	}
	}

	/**
	* vmw_dx_streamoutput_lookup - Do a streamoutput resource lookup by user key.
	* @man: Command buffer managed resource manager for current context.
	* @user_key: User-space identifier for lookup.
	*
	* Return: Valid refcounted vmw_resource on success, error pointer on failure.
	*/
	struct vmw_resource *
	vmw_dx_streamoutput_lookup(struct vmw_cmdbuf_res_manager *man,
	u32 user_key)
	{
	return vmw_cmdbuf_res_lookup(man, vmw_cmdbuf_res_streamoutput,
	user_key);
	}

	static void vmw_dx_streamoutput_res_free(struct vmw_resource *res)
	{
	struct vmw_private *dev_priv = res->dev_priv;
	struct vmw_dx_streamoutput *so = vmw_res_to_dx_streamoutput(res);

	vmw_resource_unreference(&so->cotable);
	kfree(so);
	ttm_mem_global_free(vmw_mem_glob(dev_priv), vmw_streamoutput_size);
	}

	static void vmw_dx_streamoutput_hw_destroy(struct vmw_resource *res)
	{
	/* Destroyed by user-space cmd buf or as part of context takedown. */
	res->id = -1;
	}

	/**
	* vmw_dx_streamoutput_add - Add a streamoutput as a cmd buf managed resource.
	* @man: Command buffer managed resource manager for current context.
	* @ctx: Pointer to context resource.
	* @user_key: The identifier for this streamoutput.
	* @list: The list of staged command buffer managed resources.
	*
	* Return: 0 on success, negative error code on failure.
	*/
	int vmw_dx_streamoutput_add(struct vmw_cmdbuf_res_manager *man,
	struct vmw_resource *ctx, u32 user_key,
	struct list_head *list)
	{
	struct vmw_dx_streamoutput *so;
	struct vmw_resource *res;
	struct vmw_private *dev_priv = ctx->dev_priv;
	struct ttm_operation_ctx ttm_opt_ctx = {
	.interruptible = true,
	.no_wait_gpu = false
	};
	int ret;

	if (!vmw_streamoutput_size)
	vmw_streamoutput_size = ttm_round_pot(sizeof(*so));

	ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv),
	vmw_streamoutput_size, &ttm_opt_ctx);
	if (ret) {
	if (ret != -ERESTARTSYS)
	DRM_ERROR("Out of graphics memory for streamout.\n");
	return ret;
	}

	so = kmalloc(sizeof(*so), GFP_KERNEL);
	if (!so) {
	ttm_mem_global_free(vmw_mem_glob(dev_priv),
	vmw_streamoutput_size);
	return -ENOMEM;
	}

	res = &so->res;
	so->ctx = ctx;
	so->cotable = vmw_resource_reference
	(vmw_context_cotable(ctx, SVGA_COTABLE_STREAMOUTPUT));
	so->id = user_key;
	so->committed = false;
	INIT_LIST_HEAD(&so->cotable_head);
	ret = vmw_resource_init(dev_priv, res, true,
	vmw_dx_streamoutput_res_free,
	&vmw_dx_streamoutput_func);
	if (ret)
	goto out_resource_init;

	ret = vmw_cmdbuf_res_add(man, vmw_cmdbuf_res_streamoutput, user_key,
	res, list);
	if (ret)
	goto out_resource_init;

	res->id = so->id;
	res->hw_destroy = vmw_dx_streamoutput_hw_destroy;

	out_resource_init:
	vmw_resource_unreference(&res);

	return ret;
	}

	/**
	* vmw_dx_streamoutput_set_size - Sets streamoutput mob size in res struct.
	* @res: The streamoutput res for which need to set size.
	* @size: The size provided by user-space to set.
	*/
	void vmw_dx_streamoutput_set_size(struct vmw_resource *res, u32 size)
	{
	struct vmw_dx_streamoutput *so = vmw_res_to_dx_streamoutput(res);

	so->size = size;
	}

	/**
	* vmw_dx_streamoutput_remove - Stage streamoutput for removal.
	* @man: Command buffer managed resource manager for current context.
	* @user_key: The identifier for this streamoutput.
	* @list: The list of staged command buffer managed resources.
	*
	* Return: 0 on success, negative error code on failure.
	*/
	int vmw_dx_streamoutput_remove(struct vmw_cmdbuf_res_manager *man,
	u32 user_key,
	struct list_head *list)
	{
	struct vmw_resource *r;

	return vmw_cmdbuf_res_remove(man, vmw_cmdbuf_res_streamoutput,
	(u32)user_key, list, &r);
	}

	/**
	* vmw_dx_streamoutput_cotable_list_scrub - cotable unbind_func callback.
	* @dev_priv: Device private.
	* @list: The list of cotable resources.
	* @readback: Whether the call was part of a readback unbind.
	*/
	void vmw_dx_streamoutput_cotable_list_scrub(struct vmw_private *dev_priv,
	struct list_head *list,
	bool readback)
	{
	struct vmw_dx_streamoutput entry, next;

	lockdep_assert_held_once(&dev_priv->binding_mutex);

	list_for_each_entry_safe(entry, next, list, cotable_head) {
	WARN_ON(vmw_dx_streamoutput_scrub(&entry->res));
	if (!readback)
	entry->committed =false;
	}
	}