169 lines
5.2 KiB
C
169 lines
5.2 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR MIT
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/**************************************************************************
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*
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* Copyright 2012-2016 VMware, Inc., Palo Alto, CA., USA
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#include "vmwgfx_drv.h"
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#include "vmwgfx_resource_priv.h"
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/**
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* struct vmw_stream - Overlay stream simple resource.
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* @sres: The simple resource we derive from.
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* @stream_id: The overlay stream id.
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*/
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struct vmw_stream {
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struct vmw_simple_resource sres;
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u32 stream_id;
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};
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/**
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* vmw_stream - Typecast a struct vmw_resource to a struct vmw_stream.
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* @res: Pointer to the struct vmw_resource.
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*
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* Returns: Returns a pointer to the struct vmw_stream.
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*/
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static struct vmw_stream *
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vmw_stream(struct vmw_resource *res)
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{
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return container_of(res, struct vmw_stream, sres.res);
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}
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/***************************************************************************
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* Simple resource callbacks for struct vmw_stream
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**************************************************************************/
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static void vmw_stream_hw_destroy(struct vmw_resource *res)
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{
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struct vmw_private *dev_priv = res->dev_priv;
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struct vmw_stream *stream = vmw_stream(res);
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int ret;
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ret = vmw_overlay_unref(dev_priv, stream->stream_id);
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WARN_ON_ONCE(ret != 0);
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}
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static int vmw_stream_init(struct vmw_resource *res, void *data)
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{
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struct vmw_stream *stream = vmw_stream(res);
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return vmw_overlay_claim(res->dev_priv, &stream->stream_id);
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}
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static void vmw_stream_set_arg_handle(void *data, u32 handle)
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{
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struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
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arg->stream_id = handle;
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}
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static const struct vmw_simple_resource_func va_stream_func = {
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.res_func = {
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.res_type = vmw_res_stream,
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.needs_backup = false,
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.may_evict = false,
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.type_name = "overlay stream",
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.backup_placement = NULL,
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.create = NULL,
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.destroy = NULL,
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.bind = NULL,
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.unbind = NULL
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},
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.ttm_res_type = VMW_RES_STREAM,
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.size = sizeof(struct vmw_stream),
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.init = vmw_stream_init,
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.hw_destroy = vmw_stream_hw_destroy,
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.set_arg_handle = vmw_stream_set_arg_handle,
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};
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/***************************************************************************
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* End simple resource callbacks for struct vmw_stream
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**************************************************************************/
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/**
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* vmw_stream_unref_ioctl - Ioctl to unreference a user-space handle to
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* a struct vmw_stream.
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* @dev: Pointer to the drm device.
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* @data: The ioctl argument
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* @file_priv: Pointer to a struct drm_file identifying the caller.
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*
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* Return:
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* 0 if successful.
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* Negative error value on failure.
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*/
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int vmw_stream_unref_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
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return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
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arg->stream_id);
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}
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/**
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* vmw_stream_claim_ioctl - Ioctl to claim a struct vmw_stream overlay.
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* @dev: Pointer to the drm device.
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* @data: The ioctl argument
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* @file_priv: Pointer to a struct drm_file identifying the caller.
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*
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* Return:
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* 0 if successful.
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* Negative error value on failure.
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*/
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int vmw_stream_claim_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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return vmw_simple_resource_create_ioctl(dev, data, file_priv,
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&va_stream_func);
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}
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/**
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* vmw_user_stream_lookup - Look up a struct vmw_user_stream from a handle.
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* @dev_priv: Pointer to a struct vmw_private.
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* @tfile: struct ttm_object_file identifying the caller.
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* @inout_id: In: The user-space handle. Out: The stream id.
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* @out: On output contains a refcounted pointer to the embedded
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* struct vmw_resource.
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*
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* Return:
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* 0 if successful.
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* Negative error value on failure.
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*/
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int vmw_user_stream_lookup(struct vmw_private *dev_priv,
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struct ttm_object_file *tfile,
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uint32_t *inout_id, struct vmw_resource **out)
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{
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struct vmw_stream *stream;
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struct vmw_resource *res =
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vmw_simple_resource_lookup(tfile, *inout_id, &va_stream_func);
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if (IS_ERR(res))
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return PTR_ERR(res);
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stream = vmw_stream(res);
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*inout_id = stream->stream_id;
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*out = res;
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return 0;
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}
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