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1// SPDX-License-Identifier: GPL-2.0 OR MIT
2/**************************************************************************
3 *
4 * Copyright 2012-2016 VMware, Inc., Palo Alto, CA., USA
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
24 * USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28#include "vmwgfx_bo.h"
29#include "vmwgfx_drv.h"
30#include "vmwgfx_resource_priv.h"
31
32/**
33 * struct vmw_stream - Overlay stream simple resource.
34 * @sres: The simple resource we derive from.
35 * @stream_id: The overlay stream id.
36 */
37struct vmw_stream {
38 struct vmw_simple_resource sres;
39 u32 stream_id;
40};
41
42/**
43 * vmw_stream - Typecast a struct vmw_resource to a struct vmw_stream.
44 * @res: Pointer to the struct vmw_resource.
45 *
46 * Returns: Returns a pointer to the struct vmw_stream.
47 */
48static struct vmw_stream *
49vmw_stream(struct vmw_resource *res)
50{
51 return container_of(res, struct vmw_stream, sres.res);
52}
53
54/***************************************************************************
55 * Simple resource callbacks for struct vmw_stream
56 **************************************************************************/
57static void vmw_stream_hw_destroy(struct vmw_resource *res)
58{
59 struct vmw_private *dev_priv = res->dev_priv;
60 struct vmw_stream *stream = vmw_stream(res);
61 int ret;
62
63 ret = vmw_overlay_unref(dev_priv, stream->stream_id);
64 WARN_ON_ONCE(ret != 0);
65}
66
67static int vmw_stream_init(struct vmw_resource *res, void *data)
68{
69 struct vmw_stream *stream = vmw_stream(res);
70
71 return vmw_overlay_claim(res->dev_priv, &stream->stream_id);
72}
73
74static void vmw_stream_set_arg_handle(void *data, u32 handle)
75{
76 struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
77
78 arg->stream_id = handle;
79}
80
81static const struct vmw_simple_resource_func va_stream_func = {
82 .res_func = {
83 .res_type = vmw_res_stream,
84 .needs_guest_memory = false,
85 .may_evict = false,
86 .type_name = "overlay stream",
87 .domain = VMW_BO_DOMAIN_SYS,
88 .busy_domain = VMW_BO_DOMAIN_SYS,
89 .create = NULL,
90 .destroy = NULL,
91 .bind = NULL,
92 .unbind = NULL
93 },
94 .ttm_res_type = VMW_RES_STREAM,
95 .size = sizeof(struct vmw_stream),
96 .init = vmw_stream_init,
97 .hw_destroy = vmw_stream_hw_destroy,
98 .set_arg_handle = vmw_stream_set_arg_handle,
99};
100
101/***************************************************************************
102 * End simple resource callbacks for struct vmw_stream
103 **************************************************************************/
104
105/**
106 * vmw_stream_unref_ioctl - Ioctl to unreference a user-space handle to
107 * a struct vmw_stream.
108 * @dev: Pointer to the drm device.
109 * @data: The ioctl argument
110 * @file_priv: Pointer to a struct drm_file identifying the caller.
111 *
112 * Return:
113 * 0 if successful.
114 * Negative error value on failure.
115 */
116int vmw_stream_unref_ioctl(struct drm_device *dev, void *data,
117 struct drm_file *file_priv)
118{
119 struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
120
121 return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
122 arg->stream_id);
123}
124
125/**
126 * vmw_stream_claim_ioctl - Ioctl to claim a struct vmw_stream overlay.
127 * @dev: Pointer to the drm device.
128 * @data: The ioctl argument
129 * @file_priv: Pointer to a struct drm_file identifying the caller.
130 *
131 * Return:
132 * 0 if successful.
133 * Negative error value on failure.
134 */
135int vmw_stream_claim_ioctl(struct drm_device *dev, void *data,
136 struct drm_file *file_priv)
137{
138 return vmw_simple_resource_create_ioctl(dev, data, file_priv,
139 &va_stream_func);
140}
141
142/**
143 * vmw_user_stream_lookup - Look up a struct vmw_user_stream from a handle.
144 * @dev_priv: Pointer to a struct vmw_private.
145 * @tfile: struct ttm_object_file identifying the caller.
146 * @inout_id: In: The user-space handle. Out: The stream id.
147 * @out: On output contains a refcounted pointer to the embedded
148 * struct vmw_resource.
149 *
150 * Return:
151 * 0 if successful.
152 * Negative error value on failure.
153 */
154int vmw_user_stream_lookup(struct vmw_private *dev_priv,
155 struct ttm_object_file *tfile,
156 uint32_t *inout_id, struct vmw_resource **out)
157{
158 struct vmw_stream *stream;
159 struct vmw_resource *res =
160 vmw_simple_resource_lookup(tfile, *inout_id, &va_stream_func);
161
162 if (IS_ERR(res))
163 return PTR_ERR(res);
164
165 stream = vmw_stream(res);
166 *inout_id = stream->stream_id;
167 *out = res;
168
169 return 0;
170}