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gpu: nvgpu: Add new api for setting longer timeslice on dbg node

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Add new ioctl api for setting longer timeslice and get timeslice
inside 'dbg' dev node.
Update ioctl gpu_get_characteristic to pass the max timeslice value
Add debugfs to access and change the max timeslice value

Bug 1842244

Change-Id: I7e80f59162cf5d90496f9752fc128f5fa8dcc7d2
Signed-off-by: Mayur Poojary <mpoojary@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2471569
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
GVS: Gerrit_Virtual_Submit
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Mayur Poojary
2021-01-17 21:16:51 -08:00
committed by mobile promotions
parent 0335fa69ec
commit 6277d57936
26 changed files with 226 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
drivers/gpu/nvgpu/os/linux/debug.c
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@@ -1,5 +1,5 @@
/*
* Copyright (C) 2017-2020 NVIDIA Corporation. All rights reserved.
* Copyright (C) 2017-2021 NVIDIA Corporation. All rights reserved.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
@@ -30,6 +30,7 @@
#include <nvgpu/gk20a.h>
#include <nvgpu/power_features/pg.h>
#include <nvgpu/nvgpu_init.h>
#include <nvgpu/tsg.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
@@ -338,6 +339,49 @@ static const struct file_operations timeouts_enabled_fops = {
.write = timeouts_enabled_write,
};
static ssize_t dbg_tsg_timeslice_max_read(struct file *file,
char __user *user_buf, size_t count, loff_t *ppos)
{
char buf[10];
struct gk20a *g = file->private_data;
unsigned int val = g->tsg_dbg_timeslice_max_us;
memcpy(buf, (char*)&val, sizeof(unsigned int));
return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
}
static ssize_t dbg_tsg_timeslice_max_write(struct file *file,
const char __user *user_buf, size_t count, loff_t *ppos)
{
char buf[10];
int buf_size;
unsigned int val = 0;
struct gk20a *g = file->private_data;
unsigned int max_hw_timeslice_us = g->ops.runlist.get_tsg_max_timeslice();
(void) memset(buf, 0, sizeof(buf));
buf_size = min(count, (sizeof(buf)-1));
if (copy_from_user(buf, user_buf, buf_size))
return -EFAULT;
if (kstrtouint(buf, 10, &val) < 0)
return -EINVAL;
if (val < NVGPU_TSG_TIMESLICE_MIN_US ||
val > max_hw_timeslice_us)
return -EINVAL;
g->tsg_dbg_timeslice_max_us = val;
return count;
}
static const struct file_operations dbg_tsg_timeslice_max_fops = {
.open = simple_open,
.read = dbg_tsg_timeslice_max_read,
.write = dbg_tsg_timeslice_max_write,
};
void gk20a_debug_init(struct gk20a *g, const char *debugfs_symlink)
{
struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
@@ -405,6 +449,12 @@ void gk20a_debug_init(struct gk20a *g, const char *debugfs_symlink)
debugfs_create_u32("tsg_timeslice_high_priority_us", S_IRUGO|S_IWUSR,
l->debugfs, &g->tsg_timeslice_high_priority_us);
l->debugfs_dbg_tsg_timeslice_max_us =
debugfs_create_file("max_dbg_tsg_timeslice_us",
S_IRUGO|S_IWUSR,
l->debugfs, g,
&dbg_tsg_timeslice_max_fops);
l->debugfs_runlist_interleave =
debugfs_create_bool("runlist_interleave",
S_IRUGO|S_IWUSR,