xref: /openbmc/linux/drivers/gpu/drm/nouveau/nvif/client.c (revision 59f216cf)
1 /*
2  * Copyright 2013 Red Hat Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  * Authors: Ben Skeggs <bskeggs@redhat.com>
23  */
24 
25 #include <nvif/client.h>
26 #include <nvif/driver.h>
27 #include <nvif/ioctl.h>
28 
29 #include <nvif/class.h>
30 #include <nvif/if0000.h>
31 
32 int
nvif_client_ioctl(struct nvif_client * client,void * data,u32 size)33 nvif_client_ioctl(struct nvif_client *client, void *data, u32 size)
34 {
35 	return client->driver->ioctl(client->object.priv, data, size, NULL);
36 }
37 
38 int
nvif_client_suspend(struct nvif_client * client)39 nvif_client_suspend(struct nvif_client *client)
40 {
41 	return client->driver->suspend(client->object.priv);
42 }
43 
44 int
nvif_client_resume(struct nvif_client * client)45 nvif_client_resume(struct nvif_client *client)
46 {
47 	return client->driver->resume(client->object.priv);
48 }
49 
50 void
nvif_client_dtor(struct nvif_client * client)51 nvif_client_dtor(struct nvif_client *client)
52 {
53 	nvif_object_dtor(&client->object);
54 	if (client->driver) {
55 		if (client->driver->fini)
56 			client->driver->fini(client->object.priv);
57 		client->driver = NULL;
58 	}
59 }
60 
61 int
nvif_client_ctor(struct nvif_client * parent,const char * name,u64 device,struct nvif_client * client)62 nvif_client_ctor(struct nvif_client *parent, const char *name, u64 device,
63 		 struct nvif_client *client)
64 {
65 	struct nvif_client_v0 args = { .device = device };
66 	struct {
67 		struct nvif_ioctl_v0 ioctl;
68 		struct nvif_ioctl_nop_v0 nop;
69 	} nop = {};
70 	int ret;
71 
72 	strncpy(args.name, name, sizeof(args.name));
73 	ret = nvif_object_ctor(parent != client ? &parent->object : NULL,
74 			       name ? name : "nvifClient", 0,
75 			       NVIF_CLASS_CLIENT, &args, sizeof(args),
76 			       &client->object);
77 	if (ret)
78 		return ret;
79 
80 	client->object.client = client;
81 	client->object.handle = ~0;
82 	client->route = NVIF_IOCTL_V0_ROUTE_NVIF;
83 	client->driver = parent->driver;
84 
85 	if (ret == 0) {
86 		ret = nvif_client_ioctl(client, &nop, sizeof(nop));
87 		client->version = nop.nop.version;
88 	}
89 
90 	if (ret)
91 		nvif_client_dtor(client);
92 	return ret;
93 }
94