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 | */ |
37 | struct 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 | */ |
48 | static struct vmw_stream * |
49 | vmw_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 | **************************************************************************/ |
57 | static 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_id: stream->stream_id); |
64 | WARN_ON_ONCE(ret != 0); |
65 | } |
66 | |
67 | static 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(dev_priv: res->dev_priv, out: &stream->stream_id); |
72 | } |
73 | |
74 | static 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 | |
81 | static 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 | */ |
116 | int 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(tfile: vmw_fpriv(file_priv)->tfile, |
122 | key: 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 | */ |
135 | int 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 | func: &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 | */ |
154 | int 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, handle: *inout_id, func: &va_stream_func); |
161 | |
162 | if (IS_ERR(ptr: res)) |
163 | return PTR_ERR(ptr: res); |
164 | |
165 | stream = vmw_stream(res); |
166 | *inout_id = stream->stream_id; |
167 | *out = res; |
168 | |
169 | return 0; |
170 | } |
171 | |