diff options
author | Deepak Nibade <dnibade@nvidia.com> | 2017-11-16 02:21:19 -0500 |
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committer | Deepak Nibade <dnibade@nvidia.com> | 2017-11-16 02:21:35 -0500 |
commit | ba8dc318595f597308902ad16ffed89bdbe7000f (patch) | |
tree | e882886e0cbc05ac39473b95ead16ee50bd69c15 /drivers/gpu/nvgpu/common/linux/module_t19x.c | |
parent | 69e032653df5aae335764f6346703a1e55c96a2d (diff) | |
parent | 77a90d0b8d2eb1bbb207ae5f46b357f2d7cd07ab (diff) |
Merge remote-tracking branch 'remotes/origin/dev/linux-nvgpu-t19x' into linux-nvgpu
Bug 200363166
Change-Id: Ic662d7b44b673db28dc0aeba338ae67cf2a43d64
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Diffstat (limited to 'drivers/gpu/nvgpu/common/linux/module_t19x.c')
-rw-r--r-- | drivers/gpu/nvgpu/common/linux/module_t19x.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/gpu/nvgpu/common/linux/module_t19x.c b/drivers/gpu/nvgpu/common/linux/module_t19x.c new file mode 100644 index 00000000..f0e3d438 --- /dev/null +++ b/drivers/gpu/nvgpu/common/linux/module_t19x.c | |||
@@ -0,0 +1,62 @@ | |||
1 | /* | ||
2 | * Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved. | ||
3 | * | ||
4 | * This program is free software; you can redistribute it and/or modify it | ||
5 | * under the terms and conditions of the GNU General Public License, | ||
6 | * version 2, as published by the Free Software Foundation. | ||
7 | * | ||
8 | * This program is distributed in the hope it will be useful, but WITHOUT | ||
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | ||
11 | * more details. | ||
12 | * | ||
13 | * You should have received a copy of the GNU General Public License | ||
14 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
15 | */ | ||
16 | |||
17 | #include <nvgpu/types.h> | ||
18 | |||
19 | #include <nvgpu/hw/gv11b/hw_usermode_gv11b.h> | ||
20 | |||
21 | #include "common/linux/os_linux.h" | ||
22 | |||
23 | /* | ||
24 | * Locks out the driver from accessing GPU registers. This prevents access to | ||
25 | * thse registers after the GPU has been clock or power gated. This should help | ||
26 | * find annoying bugs where register reads and writes are silently dropped | ||
27 | * after the GPU has been turned off. On older chips these reads and writes can | ||
28 | * also lock the entire CPU up. | ||
29 | */ | ||
30 | void t19x_lockout_registers(struct gk20a *g) | ||
31 | { | ||
32 | struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g); | ||
33 | |||
34 | l->t19x.usermode_regs = NULL; | ||
35 | } | ||
36 | |||
37 | /* | ||
38 | * Undoes t19x_lockout_registers(). | ||
39 | */ | ||
40 | void t19x_restore_registers(struct gk20a *g) | ||
41 | { | ||
42 | struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g); | ||
43 | |||
44 | l->t19x.usermode_regs = l->t19x.usermode_regs_saved; | ||
45 | } | ||
46 | |||
47 | void t19x_remove_support(struct gk20a *g) | ||
48 | { | ||
49 | struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g); | ||
50 | |||
51 | if (l->t19x.usermode_regs) { | ||
52 | l->t19x.usermode_regs = NULL; | ||
53 | } | ||
54 | } | ||
55 | |||
56 | void t19x_init_support(struct gk20a *g) | ||
57 | { | ||
58 | struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g); | ||
59 | |||
60 | l->t19x.usermode_regs = l->regs + usermode_cfg0_r(); | ||
61 | l->t19x.usermode_regs_saved = l->t19x.usermode_regs; | ||
62 | } | ||