From b0092ea95c6e1f695912cdb0b13767f3881cb22f Mon Sep 17 00:00:00 2001 From: Terje Bergstrom Date: Wed, 27 Sep 2017 15:05:50 -0700 Subject: gpu: nvgpu: gv11b: Abstract IO aperture accessors 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 Reviewed-on: https://git-master.nvidia.com/r/1569699 Reviewed-by: mobile promotions Tested-by: mobile promotions --- drivers/gpu/nvgpu/common/linux/io_t19x.c | 29 +++++++++++++ drivers/gpu/nvgpu/common/linux/module_t19x.c | 62 ++++++++++++++++++++++++++++ 2 files changed, 91 insertions(+) create mode 100644 drivers/gpu/nvgpu/common/linux/io_t19x.c create mode 100644 drivers/gpu/nvgpu/common/linux/module_t19x.c (limited to 'drivers/gpu/nvgpu/common') diff --git a/drivers/gpu/nvgpu/common/linux/io_t19x.c b/drivers/gpu/nvgpu/common/linux/io_t19x.c new file mode 100644 index 00000000..5c6b76ba --- /dev/null +++ b/drivers/gpu/nvgpu/common/linux/io_t19x.c @@ -0,0 +1,29 @@ +/* + * 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. + */ + +#include +#include + +#include "common/linux/os_linux.h" +#include "gk20a/gk20a.h" + +#include + +void gv11b_usermode_writel(struct gk20a *g, u32 r, u32 v) +{ + struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g); + void __iomem *reg = l->t19x.usermode_regs + (r - usermode_cfg0_r()); + + writel_relaxed(v, reg); + gk20a_dbg(gpu_dbg_reg, "usermode r=0x%x v=0x%x", r, v); +} 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 @@ +/* + * 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 . + */ + +#include + +#include + +#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; +} -- cgit v1.2.2