1 /* $NetBSD: vmwgfx_va.c,v 1.2 2021/12/18 23:45:45 riastradh Exp $ */
2
3 // SPDX-License-Identifier: GPL-2.0 OR MIT
4 /**************************************************************************
5 *
6 * Copyright 2012-2016 VMware, Inc., Palo Alto, CA., USA
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the
10 * "Software"), to deal in the Software without restriction, including
11 * without limitation the rights to use, copy, modify, merge, publish,
12 * distribute, sub license, and/or sell copies of the Software, and to
13 * permit persons to whom the Software is furnished to do so, subject to
14 * the following conditions:
15 *
16 * The above copyright notice and this permission notice (including the
17 * next paragraph) shall be included in all copies or substantial portions
18 * of the Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
23 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
24 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
25 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
26 * USE OR OTHER DEALINGS IN THE SOFTWARE.
27 *
28 **************************************************************************/
29
30 #include <sys/cdefs.h>
31 __KERNEL_RCSID(0, "$NetBSD: vmwgfx_va.c,v 1.2 2021/12/18 23:45:45 riastradh Exp $");
32
33 #include "vmwgfx_drv.h"
34 #include "vmwgfx_resource_priv.h"
35
36 /**
37 * struct vmw_stream - Overlay stream simple resource.
38 * @sres: The simple resource we derive from.
39 * @stream_id: The overlay stream id.
40 */
41 struct vmw_stream {
42 struct vmw_simple_resource sres;
43 u32 stream_id;
44 };
45
46 /**
47 * vmw_stream - Typecast a struct vmw_resource to a struct vmw_stream.
48 * @res: Pointer to the struct vmw_resource.
49 *
50 * Returns: Returns a pointer to the struct vmw_stream.
51 */
52 static struct vmw_stream *
vmw_stream(struct vmw_resource * res)53 vmw_stream(struct vmw_resource *res)
54 {
55 return container_of(res, struct vmw_stream, sres.res);
56 }
57
58 /***************************************************************************
59 * Simple resource callbacks for struct vmw_stream
60 **************************************************************************/
vmw_stream_hw_destroy(struct vmw_resource * res)61 static void vmw_stream_hw_destroy(struct vmw_resource *res)
62 {
63 struct vmw_private *dev_priv = res->dev_priv;
64 struct vmw_stream *stream = vmw_stream(res);
65 int ret;
66
67 ret = vmw_overlay_unref(dev_priv, stream->stream_id);
68 WARN_ON_ONCE(ret != 0);
69 }
70
vmw_stream_init(struct vmw_resource * res,void * data)71 static int vmw_stream_init(struct vmw_resource *res, void *data)
72 {
73 struct vmw_stream *stream = vmw_stream(res);
74
75 return vmw_overlay_claim(res->dev_priv, &stream->stream_id);
76 }
77
vmw_stream_set_arg_handle(void * data,u32 handle)78 static void vmw_stream_set_arg_handle(void *data, u32 handle)
79 {
80 struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
81
82 arg->stream_id = handle;
83 }
84
85 static const struct vmw_simple_resource_func va_stream_func = {
86 .res_func = {
87 .res_type = vmw_res_stream,
88 .needs_backup = false,
89 .may_evict = false,
90 .type_name = "overlay stream",
91 .backup_placement = NULL,
92 .create = NULL,
93 .destroy = NULL,
94 .bind = NULL,
95 .unbind = NULL
96 },
97 .ttm_res_type = VMW_RES_STREAM,
98 .size = sizeof(struct vmw_stream),
99 .init = vmw_stream_init,
100 .hw_destroy = vmw_stream_hw_destroy,
101 .set_arg_handle = vmw_stream_set_arg_handle,
102 };
103
104 /***************************************************************************
105 * End simple resource callbacks for struct vmw_stream
106 **************************************************************************/
107
108 /**
109 * vmw_stream_unref_ioctl - Ioctl to unreference a user-space handle to
110 * a struct vmw_stream.
111 * @dev: Pointer to the drm device.
112 * @data: The ioctl argument
113 * @file_priv: Pointer to a struct drm_file identifying the caller.
114 *
115 * Return:
116 * 0 if successful.
117 * Negative error value on failure.
118 */
vmw_stream_unref_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)119 int vmw_stream_unref_ioctl(struct drm_device *dev, void *data,
120 struct drm_file *file_priv)
121 {
122 struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data;
123
124 return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
125 arg->stream_id, TTM_REF_USAGE);
126 }
127
128 /**
129 * vmw_stream_claim_ioctl - Ioctl to claim a struct vmw_stream overlay.
130 * @dev: Pointer to the drm device.
131 * @data: The ioctl argument
132 * @file_priv: Pointer to a struct drm_file identifying the caller.
133 *
134 * Return:
135 * 0 if successful.
136 * Negative error value on failure.
137 */
vmw_stream_claim_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)138 int vmw_stream_claim_ioctl(struct drm_device *dev, void *data,
139 struct drm_file *file_priv)
140 {
141 return vmw_simple_resource_create_ioctl(dev, data, file_priv,
142 &va_stream_func);
143 }
144
145 /**
146 * vmw_user_stream_lookup - Look up a struct vmw_user_stream from a handle.
147 * @dev_priv: Pointer to a struct vmw_private.
148 * @tfile: struct ttm_object_file identifying the caller.
149 * @inout_id: In: The user-space handle. Out: The stream id.
150 * @out: On output contains a refcounted pointer to the embedded
151 * struct vmw_resource.
152 *
153 * Return:
154 * 0 if successful.
155 * Negative error value on failure.
156 */
vmw_user_stream_lookup(struct vmw_private * dev_priv,struct ttm_object_file * tfile,uint32_t * inout_id,struct vmw_resource ** out)157 int vmw_user_stream_lookup(struct vmw_private *dev_priv,
158 struct ttm_object_file *tfile,
159 uint32_t *inout_id, struct vmw_resource **out)
160 {
161 struct vmw_stream *stream;
162 struct vmw_resource *res =
163 vmw_simple_resource_lookup(tfile, *inout_id, &va_stream_func);
164
165 if (IS_ERR(res))
166 return PTR_ERR(res);
167
168 stream = vmw_stream(res);
169 *inout_id = stream->stream_id;
170 *out = res;
171
172 return 0;
173 }
174