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drm/vmwgfx: Re-implement the stream resource as a simple resource.

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Provide and document a reference implementation.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
This commit is contained in:
Thomas Hellstrom
2017-03-23 15:19:45 -07:00
committed by Sinclair Yeh
parent d4d2190222
commit 9f7d148022
3 changed files with 169 additions and 255 deletions
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168
drivers/gpu/drm/vmwgfx/vmwgfx_va.c Normal file
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/**************************************************************************
*
* Copyright © 2012-2016 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 "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_backup = false,
.may_evict = false,
.type_name = "overlay stream",
.backup_placement = NULL,
.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, TTM_REF_USAGE);
}
/**
* 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;
}