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gpu: nvgpu: add FLCG support for PERFMON

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Add FLCG register programming for PERFMON

Jira NVGPU-7228

Change-Id: Ia1b3b2976c65c44f718789bcfbef4cad7e0718b3
Signed-off-by: Sagar Kadamati <skadamati@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2712095
Tested-by: Rajesh Devaraj <rdevaraj@nvidia.com>
Reviewed-by: Antony Clince Alex <aalex@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-misra <svc-mobile-misra@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
Reviewed-by: Ankur Kishore <ankkishore@nvidia.com>
GVS: Gerrit_Virtual_Submit
This commit is contained in:
Sagar Kadamati
2022-05-12 01:59:54 +05:30
committed by mobile promotions
parent 8ed2431646
commit fdba1eef10
8 changed files with 106 additions and 1 deletions
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4
drivers/gpu/nvgpu/os/linux/driver_common.c
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@@ -188,6 +188,8 @@ static void nvgpu_init_pm_vars(struct gk20a *g)
* Set up initial power settings. For non-slicon platforms, disable
* power features and for silicon platforms, read from platform data
*/
g->flcg_enabled =
nvgpu_platform_is_silicon(g) ? platform->enable_flcg : false;
g->slcg_enabled =
nvgpu_platform_is_silicon(g) ? platform->enable_slcg : false;
g->blcg_enabled =
@@ -203,6 +205,8 @@ static void nvgpu_init_pm_vars(struct gk20a *g)
nvgpu_set_enabled(g, NVGPU_GPU_CAN_ELCG,
nvgpu_platform_is_silicon(g) ? platform->can_elcg : false);
nvgpu_set_enabled(g, NVGPU_GPU_CAN_FLCG,
nvgpu_platform_is_silicon(g) ? platform->can_flcg : false);
nvgpu_set_enabled(g, NVGPU_GPU_CAN_SLCG,
nvgpu_platform_is_silicon(g) ? platform->can_slcg : false);
nvgpu_set_enabled(g, NVGPU_GPU_CAN_BLCG,

8
drivers/gpu/nvgpu/os/linux/platform_gk20a.h
View File

@@ -1,7 +1,7 @@
/*
* GK20A Platform (SoC) Interface
*
* Copyright (c) 2014-2021, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2014-2022, 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,
@@ -133,6 +133,9 @@ struct gk20a_platform {
/* init value for slowdown factor */
u8 ldiv_slowdown_factor_init;
/* First Level Clock Gating: true = enable false = disable */
bool enable_flcg;
/* Second Level Clock Gating: true = enable false = disable */
bool enable_slcg;
@@ -142,6 +145,9 @@ struct gk20a_platform {
/* Engine Level Clock Gating: true = enable flase = disable */
bool enable_elcg;
/* Should be populated at probe. */
bool can_flcg;
/* Should be populated at probe. */
bool can_slcg;

41
drivers/gpu/nvgpu/os/linux/sysfs.c
View File

@@ -182,6 +182,45 @@ static ssize_t slcg_enable_read(struct device *dev,
static DEVICE_ATTR(slcg_enable, ROOTRW, slcg_enable_read, slcg_enable_store);
static ssize_t flcg_enable_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct gk20a *g = get_gk20a(dev);
unsigned long val = 0;
int err;
if (kstrtoul(buf, 10, &val) < 0)
return -EINVAL;
err = gk20a_busy(g);
if (err) {
return err;
}
if (val) {
nvgpu_cg_flcg_set_flcg_enabled(g, true);
} else {
nvgpu_cg_flcg_set_flcg_enabled(g, false);
}
gk20a_idle(g);
nvgpu_info(g, "FLCG is %s.", val ? "enabled" :
"disabled");
return count;
}
static ssize_t flcg_enable_read(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct gk20a *g = get_gk20a(dev);
return snprintf(buf, NVGPU_CPU_PAGE_SIZE, "%d\n", g->flcg_enabled ? 1 : 0);
}
static DEVICE_ATTR(flcg_enable, ROOTRW, flcg_enable_read, flcg_enable_store);
static ssize_t ptimer_scale_factor_show(struct device *dev,
struct device_attribute *attr,
char *buf)
@@ -1447,6 +1486,7 @@ void nvgpu_remove_sysfs(struct device *dev)
device_remove_file(dev, &dev_attr_elcg_enable);
device_remove_file(dev, &dev_attr_blcg_enable);
device_remove_file(dev, &dev_attr_slcg_enable);
device_remove_file(dev, &dev_attr_flcg_enable);
device_remove_file(dev, &dev_attr_ptimer_scale_factor);
device_remove_file(dev, &dev_attr_ptimer_ref_freq);
device_remove_file(dev, &dev_attr_ptimer_src_freq);
@@ -1515,6 +1555,7 @@ int nvgpu_create_sysfs(struct device *dev)
error |= device_create_file(dev, &dev_attr_elcg_enable);
error |= device_create_file(dev, &dev_attr_blcg_enable);
error |= device_create_file(dev, &dev_attr_slcg_enable);
error |= device_create_file(dev, &dev_attr_flcg_enable);
error |= device_create_file(dev, &dev_attr_ptimer_scale_factor);
error |= device_create_file(dev, &dev_attr_ptimer_ref_freq);
error |= device_create_file(dev, &dev_attr_ptimer_src_freq);