path: root/include/os/linux/sysfs.c

/*
 * Copyright (c) 2011-2019, 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.
 *
 * 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 <linux/device.h>
#include <linux/pm_runtime.h>
#include <linux/fb.h>

#include <nvgpu/kmem.h>
#include <nvgpu/nvhost.h>
#include <nvgpu/ptimer.h>
#include <nvgpu/power_features/cg.h>
#include <nvgpu/power_features/pg.h>

#include "os_linux.h"
#include "sysfs.h"
#include "platform_gk20a.h"
#include "gk20a/gr_gk20a.h"
#include "gv11b/gr_gv11b.h"

#define PTIMER_FP_FACTOR			1000000

#define ROOTRW (S_IRWXU|S_IRGRP|S_IROTH)

#define TPC_MASK_FOR_ALL_ACTIVE_TPCs           (u32) 0x0

static ssize_t elcg_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_elcg_set_elcg_enabled(g, true);
	} else {
		nvgpu_cg_elcg_set_elcg_enabled(g, false);
	}

	gk20a_idle(g);

	nvgpu_info(g, "ELCG is %s.", val ? "enabled" :
			"disabled");

	return count;
}

static ssize_t elcg_enable_read(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct gk20a *g = get_gk20a(dev);

	return snprintf(buf, PAGE_SIZE, "%d\n", g->elcg_enabled ? 1 : 0);
}

static DEVICE_ATTR(elcg_enable, ROOTRW, elcg_enable_read, elcg_enable_store);

static ssize_t blcg_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_blcg_set_blcg_enabled(g, true);
	} else {
		nvgpu_cg_blcg_set_blcg_enabled(g, false);
	}

	gk20a_idle(g);

	nvgpu_info(g, "BLCG is %s.", val ? "enabled" :
			"disabled");

	return count;
}

static ssize_t blcg_enable_read(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct gk20a *g = get_gk20a(dev);

	return snprintf(buf, PAGE_SIZE, "%d\n", g->blcg_enabled ? 1 : 0);
}


static DEVICE_ATTR(blcg_enable, ROOTRW, blcg_enable_read, blcg_enable_store);

static ssize_t slcg_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_slcg_set_slcg_enabled(g, true);
	} else {
		nvgpu_cg_slcg_set_slcg_enabled(g, false);
	}

	/*
	 * TODO: slcg_therm_load_gating is not enabled anywhere during
	 * init. Therefore, it would be incongruous to add it here. Once
	 * it is added to init, we should add it here too.
	 */
	gk20a_idle(g);

	nvgpu_info(g, "SLCG is %s.", val ? "enabled" :
			"disabled");

	return count;
}

static ssize_t slcg_enable_read(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct gk20a *g = get_gk20a(dev);

	return snprintf(buf, PAGE_SIZE, "%d\n", g->slcg_enabled ? 1 : 0);
}

static DEVICE_ATTR(slcg_enable, ROOTRW, slcg_enable_read, slcg_enable_store);

static ssize_t ptimer_scale_factor_show(struct device *dev,
					struct device_attribute *attr,
					char *buf)
{
	struct gk20a *g = get_gk20a(dev);
	struct gk20a_platform *platform = dev_get_drvdata(dev);
	u32 src_freq_hz = platform->ptimer_src_freq;
	u32 scaling_factor_fp;
	ssize_t res;

	if (!src_freq_hz) {
		nvgpu_err(g, "reference clk_m rate is not set correctly");
		return