nouveau/nvif/userc361.c

0001 /*
0002  * Copyright 2018 Red Hat Inc.
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice shall be included in
0012  * all copies or substantial portions of the Software.
0013  *
0014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0017  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
0018  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
0019  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
0020  * OTHER DEALINGS IN THE SOFTWARE.
0021  */
0022 #include <nvif/user.h>
0023
0024 static u64
0025 nvif_userc361_time(struct nvif_user *user)
0026 {
0027     u32 hi, lo;
0028
0029     do {
0030         hi = nvif_rd32(&user->object, 0x084);
0031         lo = nvif_rd32(&user->object, 0x080);
0032     } while (hi != nvif_rd32(&user->object, 0x084));
0033
0034     return ((u64)hi << 32 | lo);
0035 }
0036
0037 static void
0038 nvif_userc361_doorbell(struct nvif_user *user, u32 token)
0039 {
0040     nvif_wr32(&user->object, 0x90, token);
0041 }
0042
0043 const struct nvif_user_func
0044 nvif_userc361 = {
0045     .doorbell = nvif_userc361_doorbell,
0046     .time = nvif_userc361_time,
0047 };