// SPDX-License-Identifier: GPL-2.0 OR MIT
/**************************************************************************
*
* Copyright 2012 - 2016 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 .
*
**************************************************************************/
#include "vmwgfx_bo.h"
#include "vmwgfx_drv.h"
#include "vmwgfx_resource_priv.h"
/**
* struct vmw_stream - Overlay stream simple resource .
* @ sres : The simple resource we derive from .
* @ stream_id : The overlay stream id .
*/
struct vmw_stream {
struct vmw_simple_resource sres;
u32 stream_id;
};
/**
* vmw_stream - Typecast a struct vmw_resource to a struct vmw_stream .
* @ res : Pointer to the struct vmw_resource .
*
* Returns : Returns a pointer to the struct vmw_stream .
*/
static struct vmw_stream *
vmw_stream(struct vmw_resource *res)
{
return container_of(res, struct vmw_stream, sres.res);
}
/***************************************************************************
* Simple resource callbacks for struct vmw_stream
**************************************************************************/
static void vmw_stream_hw_destroy(struct vmw_resource *res)
{
struct vmw_private *dev_priv = res->dev_priv;
struct vmw_stream *stream = vmw_stream(res);
int ret;
ret = vmw_overlay_unref(dev_priv, stream->stream_id);
WARN_ON_ONCE(ret != 0 );
}
static int vmw_stream_init(struct vmw_resource *res, void *data)
{
struct vmw_stream *stream = vmw_stream(res);
return vmw_overlay_claim(res->dev_priv, &stream->stream_id);
}
static void vmw_stream_set_arg_handle(void *data, u32 handle)
{
struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
arg->stream_id = handle;
}
static const struct vmw_simple_resource_func va_stream_func = {
.res_func = {
.res_type = vmw_res_stream,
.needs_guest_memory = false ,
.may_evict = false ,
.type_name = "overlay stream" ,
.domain = VMW_BO_DOMAIN_SYS,
.busy_domain = VMW_BO_DOMAIN_SYS,
.create = NULL,
.destroy = NULL,
.bind = NULL,
.unbind = NULL
},
.ttm_res_type = VMW_RES_STREAM,
.size = sizeof (struct vmw_stream),
.init = vmw_stream_init,
.hw_destroy = vmw_stream_hw_destroy,
.set_arg_handle = vmw_stream_set_arg_handle,
};
/***************************************************************************
* End simple resource callbacks for struct vmw_stream
**************************************************************************/
/**
* vmw_stream_unref_ioctl - Ioctl to unreference a user - space handle to
* a struct vmw_stream .
* @ dev : Pointer to the drm device .
* @ data : The ioctl argument
* @ file_priv : Pointer to a struct drm_file identifying the caller .
*
* Return :
* 0 if successful .
* Negative error value on failure .
*/
int vmw_stream_unref_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
arg->stream_id);
}
/**
* vmw_stream_claim_ioctl - Ioctl to claim a struct vmw_stream overlay .
* @ dev : Pointer to the drm device .
* @ data : The ioctl argument
* @ file_priv : Pointer to a struct drm_file identifying the caller .
*
* Return :
* 0 if successful .
* Negative error value on failure .
*/
int vmw_stream_claim_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
return vmw_simple_resource_create_ioctl(dev, data, file_priv,
&va_stream_func);
}
/**
* vmw_user_stream_lookup - Look up a struct vmw_user_stream from a handle .
* @ dev_priv : Pointer to a struct vmw_private .
* @ tfile : struct ttm_object_file identifying the caller .
* @ inout_id : In : The user - space handle . Out : The stream id .
* @ out : On output contains a refcounted pointer to the embedded
* struct vmw_resource .
*
* Return :
* 0 if successful .
* Negative error value on failure .
*/
int vmw_user_stream_lookup(struct vmw_private *dev_priv,
struct ttm_object_file *tfile,
uint32_t *inout_id, struct vmw_resource **out)
{
struct vmw_stream *stream;
struct vmw_resource *res =
vmw_simple_resource_lookup(tfile, *inout_id, &va_stream_func);
if (IS_ERR(res))
return PTR_ERR(res);
stream = vmw_stream(res);
*inout_id = stream->stream_id;
*out = res;
return 0 ;
}
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(vorverarbeitet am 2026-09-27)
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