From 01e6fac4d61fdd7fff5433942ec93fc2ea1e4df1 Mon Sep 17 00:00:00 2001 From: Joshua Bakita Date: Wed, 28 Jun 2023 18:24:25 -0400 Subject: Include nvgpu headers These are needed to build on NVIDIA's Jetson boards for the time being. Only a couple structs are required, so it should be fairly easy to remove this dependency at some point in the future. --- include/os/linux/module_usermode.c | 62 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 include/os/linux/module_usermode.c (limited to 'include/os/linux/module_usermode.c') diff --git a/include/os/linux/module_usermode.c b/include/os/linux/module_usermode.c new file mode 100644 index 0000000..ea01c1b --- /dev/null +++ b/include/os/linux/module_usermode.c @@ -0,0 +1,62 @@ +/* + * Copyright (c) 2017-2018, NVIDIA CORPORATION. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include + +#include + +#include "os_linux.h" + +/* + * Locks out the driver from accessing GPU registers. This prevents access to + * thse registers after the GPU has been clock or power gated. This should help + * find annoying bugs where register reads and writes are silently dropped + * after the GPU has been turned off. On older chips these reads and writes can + * also lock the entire CPU up. + */ +void nvgpu_lockout_usermode_registers(struct gk20a *g) +{ + struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g); + + l->usermode_regs = NULL; +} + +/* + * Undoes t19x_lockout_registers(). + */ +void nvgpu_restore_usermode_registers(struct gk20a *g) +{ + struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g); + + l->usermode_regs = l->usermode_regs_saved; +} + +void nvgpu_remove_usermode_support(struct gk20a *g) +{ + struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g); + + if (l->usermode_regs) { + l->usermode_regs = NULL; + } +} + +void nvgpu_init_usermode_support(struct gk20a *g) +{ + struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g); + + l->usermode_regs = l->regs + usermode_cfg0_r(); + l->usermode_regs_saved = l->usermode_regs; +} -- cgit v1.2.2