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dff96888 | 1 | // SPDX-License-Identifier: GPL-2.0 OR MIT |
9f7d1480 TH |
2 | /************************************************************************** |
3 | * | |
dff96888 | 4 | * Copyright 2012-2016 VMware, Inc., Palo Alto, CA., USA |
9f7d1480 TH |
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_drv.h" | |
29 | #include "vmwgfx_resource_priv.h" | |
30 | ||
31 | /** | |
32 | * struct vmw_stream - Overlay stream simple resource. | |
33 | * @sres: The simple resource we derive from. | |
34 | * @stream_id: The overlay stream id. | |
35 | */ | |
36 | struct vmw_stream { | |
37 | struct vmw_simple_resource sres; | |
38 | u32 stream_id; | |
39 | }; | |
40 | ||
41 | /** | |
42 | * vmw_stream - Typecast a struct vmw_resource to a struct vmw_stream. | |
43 | * @res: Pointer to the struct vmw_resource. | |
44 | * | |
45 | * Returns: Returns a pointer to the struct vmw_stream. | |
46 | */ | |
47 | static struct vmw_stream * | |
48 | vmw_stream(struct vmw_resource *res) | |
49 | { | |
50 | return container_of(res, struct vmw_stream, sres.res); | |
51 | } | |
52 | ||
53 | /*************************************************************************** | |
54 | * Simple resource callbacks for struct vmw_stream | |
55 | **************************************************************************/ | |
56 | static void vmw_stream_hw_destroy(struct vmw_resource *res) | |
57 | { | |
58 | struct vmw_private *dev_priv = res->dev_priv; | |
59 | struct vmw_stream *stream = vmw_stream(res); | |
60 | int ret; | |
61 | ||
62 | ret = vmw_overlay_unref(dev_priv, stream->stream_id); | |
63 | WARN_ON_ONCE(ret != 0); | |
64 | } | |
65 | ||
66 | static int vmw_stream_init(struct vmw_resource *res, void *data) | |
67 | { | |
68 | struct vmw_stream *stream = vmw_stream(res); | |
69 | ||
70 | return vmw_overlay_claim(res->dev_priv, &stream->stream_id); | |
71 | } | |
72 | ||
73 | static void vmw_stream_set_arg_handle(void *data, u32 handle) | |
74 | { | |
75 | struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; | |
76 | ||
77 | arg->stream_id = handle; | |
78 | } | |
79 | ||
80 | static const struct vmw_simple_resource_func va_stream_func = { | |
81 | .res_func = { | |
82 | .res_type = vmw_res_stream, | |
83 | .needs_backup = false, | |
84 | .may_evict = false, | |
85 | .type_name = "overlay stream", | |
86 | .backup_placement = NULL, | |
87 | .create = NULL, | |
88 | .destroy = NULL, | |
89 | .bind = NULL, | |
90 | .unbind = NULL | |
91 | }, | |
92 | .ttm_res_type = VMW_RES_STREAM, | |
93 | .size = sizeof(struct vmw_stream), | |
94 | .init = vmw_stream_init, | |
95 | .hw_destroy = vmw_stream_hw_destroy, | |
96 | .set_arg_handle = vmw_stream_set_arg_handle, | |
97 | }; | |
98 | ||
99 | /*************************************************************************** | |
100 | * End simple resource callbacks for struct vmw_stream | |
101 | **************************************************************************/ | |
102 | ||
103 | /** | |
104 | * vmw_stream_unref_ioctl - Ioctl to unreference a user-space handle to | |
105 | * a struct vmw_stream. | |
106 | * @dev: Pointer to the drm device. | |
107 | * @data: The ioctl argument | |
108 | * @file_priv: Pointer to a struct drm_file identifying the caller. | |
109 | * | |
110 | * Return: | |
111 | * 0 if successful. | |
112 | * Negative error value on failure. | |
113 | */ | |
114 | int vmw_stream_unref_ioctl(struct drm_device *dev, void *data, | |
115 | struct drm_file *file_priv) | |
116 | { | |
117 | struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; | |
118 | ||
119 | return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, | |
120 | arg->stream_id, TTM_REF_USAGE); | |
121 | } | |
122 | ||
123 | /** | |
124 | * vmw_stream_claim_ioctl - Ioctl to claim a struct vmw_stream overlay. | |
125 | * @dev: Pointer to the drm device. | |
126 | * @data: The ioctl argument | |
127 | * @file_priv: Pointer to a struct drm_file identifying the caller. | |
128 | * | |
129 | * Return: | |
130 | * 0 if successful. | |
131 | * Negative error value on failure. | |
132 | */ | |
133 | int vmw_stream_claim_ioctl(struct drm_device *dev, void *data, | |
134 | struct drm_file *file_priv) | |
135 | { | |
136 | return vmw_simple_resource_create_ioctl(dev, data, file_priv, | |
137 | &va_stream_func); | |
138 | } | |
139 | ||
140 | /** | |
141 | * vmw_user_stream_lookup - Look up a struct vmw_user_stream from a handle. | |
142 | * @dev_priv: Pointer to a struct vmw_private. | |
143 | * @tfile: struct ttm_object_file identifying the caller. | |
144 | * @inout_id: In: The user-space handle. Out: The stream id. | |
145 | * @out: On output contains a refcounted pointer to the embedded | |
146 | * struct vmw_resource. | |
147 | * | |
148 | * Return: | |
149 | * 0 if successful. | |
150 | * Negative error value on failure. | |
151 | */ | |
152 | int vmw_user_stream_lookup(struct vmw_private *dev_priv, | |
153 | struct ttm_object_file *tfile, | |
154 | uint32_t *inout_id, struct vmw_resource **out) | |
155 | { | |
156 | struct vmw_stream *stream; | |
157 | struct vmw_resource *res = | |
158 | vmw_simple_resource_lookup(tfile, *inout_id, &va_stream_func); | |
159 | ||
160 | if (IS_ERR(res)) | |
161 | return PTR_ERR(res); | |
162 | ||
163 | stream = vmw_stream(res); | |
164 | *inout_id = stream->stream_id; | |
165 | *out = res; | |
166 | ||
167 | return 0; | |
168 | } |