1 /*
2  * Copyright 2018 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 #include <nvif/user.h>
23 
24 static u64
nvif_userc361_time(struct nvif_user * user)25 nvif_userc361_time(struct nvif_user *user)
26 {
27 	u32 hi, lo;
28 
29 	do {
30 		hi = nvif_rd32(&user->object, 0x084);
31 		lo = nvif_rd32(&user->object, 0x080);
32 	} while (hi != nvif_rd32(&user->object, 0x084));
33 
34 	return ((u64)hi << 32 | lo);
35 }
36 
37 static void
nvif_userc361_doorbell(struct nvif_user * user,u32 token)38 nvif_userc361_doorbell(struct nvif_user *user, u32 token)
39 {
40 	nvif_wr32(&user->object, 0x90, token);
41 }
42 
43 const struct nvif_user_func
44 nvif_userc361 = {
45 	.doorbell = nvif_userc361_doorbell,
46 	.time = nvif_userc361_time,
47 };
48