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2a2c16af5f
Move all Linux source code files to drivers/gpu/nvgpu/os/linux from drivers/gpu/nvgpu/common/linux. This changes the meaning of common to be OS independent. JIRA NVGPU-598 JIRA NVGPU-601 Change-Id: Ib7f2a43d3688bb0d0b7dcc48469a6783fd988ce9 Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1747714 Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
/*
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* Copyright (c) 2017-2018, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <nvgpu/types.h>
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#include <nvgpu/hw/gv11b/hw_usermode_gv11b.h>
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#include "os_linux.h"
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/*
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* Locks out the driver from accessing GPU registers. This prevents access to
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* thse registers after the GPU has been clock or power gated. This should help
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* find annoying bugs where register reads and writes are silently dropped
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* after the GPU has been turned off. On older chips these reads and writes can
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* also lock the entire CPU up.
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*/
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void nvgpu_lockout_usermode_registers(struct gk20a *g)
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{
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struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
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l->usermode_regs = NULL;
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}
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/*
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* Undoes t19x_lockout_registers().
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*/
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void nvgpu_restore_usermode_registers(struct gk20a *g)
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{
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struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
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l->usermode_regs = l->usermode_regs_saved;
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}
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void nvgpu_remove_usermode_support(struct gk20a *g)
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{
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struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
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if (l->usermode_regs) {
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l->usermode_regs = NULL;
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}
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}
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void nvgpu_init_usermode_support(struct gk20a *g)
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{
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struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
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l->usermode_regs = l->regs + usermode_cfg0_r();
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l->usermode_regs_saved = l->usermode_regs;
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}
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