mirror of
git://nv-tegra.nvidia.com/linux-nvgpu.git
synced 2025-12-22 17:36:20 +03:00
b0092ea95c
Implement T19x specific usermode aperture initialization functions. Move usermode_regs field to nvgpu_os_linux_t19x, because it is Linux specific. JIRA NVGPU-259 Change-Id: I9d6ce243a692ab48209d468288ed85f89fb26770 Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1569699 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
/*
|
|
* Copyright (c) 2017, 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 <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <nvgpu/types.h>
|
|
|
|
#include <nvgpu/hw/gv11b/hw_usermode_gv11b.h>
|
|
|
|
#include "common/linux/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 t19x_lockout_registers(struct gk20a *g)
|
|
{
|
|
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
|
|
|
|
l->t19x.usermode_regs = NULL;
|
|
}
|
|
|
|
/*
|
|
* Undoes t19x_lockout_registers().
|
|
*/
|
|
void t19x_restore_registers(struct gk20a *g)
|
|
{
|
|
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
|
|
|
|
l->t19x.usermode_regs = l->t19x.usermode_regs_saved;
|
|
}
|
|
|
|
void t19x_remove_support(struct gk20a *g)
|
|
{
|
|
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
|
|
|
|
if (l->t19x.usermode_regs) {
|
|
l->t19x.usermode_regs = NULL;
|
|
}
|
|
}
|
|
|
|
void t19x_init_support(struct gk20a *g)
|
|
{
|
|
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
|
|
|
|
l->t19x.usermode_regs = l->regs + usermode_cfg0_r();
|
|
l->t19x.usermode_regs_saved = l->t19x.usermode_regs;
|
|
}
|