xref: /openbmc/linux/drivers/gpu/drm/vmwgfx/vmwgfx_va.c (revision 668b2066)
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 *
vmw_stream(struct vmw_resource * res)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  **************************************************************************/
vmw_stream_hw_destroy(struct vmw_resource * res)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->stream_id);
64 	WARN_ON_ONCE(ret != 0);
65 }
66 
vmw_stream_init(struct vmw_resource * res,void * data)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(res->dev_priv, &stream->stream_id);
72 }
73 
vmw_stream_set_arg_handle(void * data,u32 handle)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  */
vmw_stream_unref_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)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(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  */
vmw_stream_claim_ioctl(struct drm_device * dev,void * data,struct drm_file * file_priv)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 						&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  */
vmw_user_stream_lookup(struct vmw_private * dev_priv,struct ttm_object_file * tfile,uint32_t * inout_id,struct vmw_resource ** out)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, *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 }
171