mirror of
git://nv-tegra.nvidia.com/linux-nvgpu.git
synced 2025-12-22 17:36:20 +03:00
3a11bd69e7
This reverts commit c100ac23455d450a7046c62915014111a0aa2e70. Bug 3009270 Change-Id: I1db1acac63c841b5383d75ec674fdc2160a0c84d Signed-off-by: Tejal Kudav <tkudav@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2356076 Reviewed-by: Deepak Nibade <dnibade@nvidia.com> Reviewed-by: automaticguardword <automaticguardword@nvidia.com>
137 lines
3.2 KiB
C
137 lines
3.2 KiB
C
/*
|
|
* Copyright (c) 2017-2019, 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 <nvgpu/io.h>
|
|
#include <nvgpu/types.h>
|
|
#include <nvgpu/gk20a.h>
|
|
#include <nvgpu/nvgpu_init.h>
|
|
|
|
#include "os_linux.h"
|
|
|
|
static void nvgpu_warn_on_no_regs(void)
|
|
{
|
|
WARN_ONCE(true, "Attempted access to GPU regs after unmapping!");
|
|
}
|
|
|
|
void nvgpu_writel(struct gk20a *g, u32 r, u32 v)
|
|
{
|
|
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
|
|
|
|
if (unlikely(!l->regs)) {
|
|
nvgpu_warn_on_no_regs();
|
|
nvgpu_log(g, gpu_dbg_reg, "r=0x%x v=0x%x (failed)", r, v);
|
|
} else {
|
|
writel_relaxed(v, l->regs + r);
|
|
nvgpu_wmb();
|
|
nvgpu_log(g, gpu_dbg_reg, "r=0x%x v=0x%x", r, v);
|
|
}
|
|
}
|
|
|
|
void nvgpu_writel_relaxed(struct gk20a *g, u32 r, u32 v)
|
|
{
|
|
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
|
|
|
|
if (unlikely(!l->regs)) {
|
|
nvgpu_warn_on_no_regs();
|
|
nvgpu_log(g, gpu_dbg_reg, "r=0x%x v=0x%x (failed)", r, v);
|
|
} else {
|
|
writel_relaxed(v, l->regs + r);
|
|
}
|
|
}
|
|
|
|
u32 nvgpu_readl(struct gk20a *g, u32 r)
|
|
{
|
|
u32 v = nvgpu_readl_impl(g, r);
|
|
|
|
if (v == 0xffffffff)
|
|
nvgpu_check_gpu_state(g);
|
|
|
|
return v;
|
|
}
|
|
|
|
u32 nvgpu_readl_impl(struct gk20a *g, u32 r)
|
|
{
|
|
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
|
|
u32 v = 0xffffffff;
|
|
|
|
if (unlikely(!l->regs)) {
|
|
nvgpu_warn_on_no_regs();
|
|
nvgpu_log(g, gpu_dbg_reg, "r=0x%x v=0x%x (failed)", r, v);
|
|
} else {
|
|
v = readl(l->regs + r);
|
|
nvgpu_log(g, gpu_dbg_reg, "r=0x%x v=0x%x", r, v);
|
|
}
|
|
|
|
return v;
|
|
}
|
|
|
|
void nvgpu_writel_loop(struct gk20a *g, u32 r, u32 v)
|
|
{
|
|
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
|
|
|
|
if (unlikely(!l->regs)) {
|
|
nvgpu_warn_on_no_regs();
|
|
nvgpu_log(g, gpu_dbg_reg, "r=0x%x v=0x%x (failed)", r, v);
|
|
} else {
|
|
nvgpu_wmb();
|
|
do {
|
|
writel_relaxed(v, l->regs + r);
|
|
} while (readl(l->regs + r) != v);
|
|
nvgpu_log(g, gpu_dbg_reg, "r=0x%x v=0x%x", r, v);
|
|
}
|
|
}
|
|
|
|
void nvgpu_bar1_writel(struct gk20a *g, u32 b, u32 v)
|
|
{
|
|
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
|
|
|
|
if (unlikely(!l->bar1)) {
|
|
nvgpu_warn_on_no_regs();
|
|
nvgpu_log(g, gpu_dbg_reg, "b=0x%x v=0x%x (failed)", b, v);
|
|
} else {
|
|
nvgpu_wmb();
|
|
writel_relaxed(v, l->bar1 + b);
|
|
nvgpu_log(g, gpu_dbg_reg, "b=0x%x v=0x%x", b, v);
|
|
}
|
|
}
|
|
|
|
u32 nvgpu_bar1_readl(struct gk20a *g, u32 b)
|
|
{
|
|
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
|
|
u32 v = 0xffffffff;
|
|
|
|
if (unlikely(!l->bar1)) {
|
|
nvgpu_warn_on_no_regs();
|
|
nvgpu_log(g, gpu_dbg_reg, "b=0x%x v=0x%x (failed)", b, v);
|
|
} else {
|
|
v = readl(l->bar1 + b);
|
|
nvgpu_log(g, gpu_dbg_reg, "b=0x%x v=0x%x", b, v);
|
|
}
|
|
|
|
return v;
|
|
}
|
|
|
|
bool nvgpu_io_exists(struct gk20a *g)
|
|
{
|
|
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
|
|
|
|
return l->regs != NULL;
|
|
}
|
|
|
|
bool nvgpu_io_valid_reg(struct gk20a *g, u32 r)
|
|
{
|
|
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
|
|
|
|
return r < resource_size(l->regs);
|
|
}
|