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// SPDX-License-Identifier: GPL-2.0-only
/* Copyright(c) 2023 Intel Corporation */
#include <linux/debugfs.h>
#include <linux/errno.h>
#include <linux/export.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/kstrtox.h>
#include <linux/types.h>
#include "adf_admin.h"
#include "adf_cfg.h"
#include "adf_common_drv.h"
#include "adf_heartbeat.h"
#include "adf_heartbeat_dbgfs.h"
#define HB_OK 0
#define HB_ERROR -1
#define HB_STATUS_MAX_STRLEN 4
#define HB_STATS_MAX_STRLEN 16
static ssize_t adf_hb_stats_read(struct file *file, char __user *user_buffer,
size_t count, loff_t *ppos)
{
char buf[HB_STATS_MAX_STRLEN];
unsigned int *value;
int len;
if (*ppos > 0)
return 0;
value = file->private_data;
len = scnprintf(buf, sizeof(buf), "%u\n", *value);
return simple_read_from_buffer(user_buffer, count, ppos, buf, len + 1);
}
static const struct file_operations adf_hb_stats_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = adf_hb_stats_read,
};
static ssize_t adf_hb_status_read(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
enum adf_device_heartbeat_status hb_status;
char ret_str[HB_STATUS_MAX_STRLEN];
struct adf_accel_dev *accel_dev;
int ret_code;
size_t len;
if (*ppos > 0)
return 0;
accel_dev = file->private_data;
ret_code = HB_OK;
adf_heartbeat_status(accel_dev, &hb_status);
if (hb_status != HB_DEV_ALIVE)
ret_code = HB_ERROR;
len = scnprintf(ret_str, sizeof(ret_str), "%d\n", ret_code);
return simple_read_from_buffer(user_buf, count, ppos, ret_str, len + 1);
}
static const struct file_operations adf_hb_status_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = adf_hb_status_read,
};
static ssize_t adf_hb_cfg_read(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
char timer_str[ADF_CFG_MAX_VAL_LEN_IN_BYTES];
struct adf_accel_dev *accel_dev;
unsigned int timer_ms;
int len;
if (*ppos > 0)
return 0;
accel_dev = file->private_data;
timer_ms = accel_dev->heartbeat->hb_timer;
len = scnprintf(timer_str, sizeof(timer_str), "%u\n", timer_ms);
return simple_read_from_buffer(user_buf, count, ppos, timer_str,
len + 1);
}
static ssize_t adf_hb_cfg_write(struct file *file, const char __user *user_buf,
size_t count, loff_t *ppos)
{
char input_str[ADF_CFG_MAX_VAL_LEN_IN_BYTES] = { };
struct adf_accel_dev *accel_dev;
int ret, written_chars;
unsigned int timer_ms;
u32 ticks;
accel_dev = file->private_data;
timer_ms = ADF_CFG_HB_TIMER_DEFAULT_MS;
/* last byte left as string termination */
if (count > sizeof(input_str) - 1)
return -EINVAL;
written_chars = simple_write_to_buffer(input_str, sizeof(input_str) - 1,
ppos, user_buf, count);
if (written_chars > 0) {
ret = kstrtouint(input_str, 10, &timer_ms);
if (ret) {
dev_err(&GET_DEV(accel_dev),
"heartbeat_cfg: Invalid value\n");
return ret;
}
if (timer_ms < ADF_CFG_HB_TIMER_MIN_MS) {
dev_err(&GET_DEV(accel_dev),
"heartbeat_cfg: Invalid value\n");
return -EINVAL;
}
/*
* On 4xxx devices adf_timer is responsible for HB updates and
* its period is fixed to 200ms
*/
if (accel_dev->timer)
timer_ms = ADF_CFG_HB_TIMER_MIN_MS;
ret = adf_heartbeat_save_cfg_param(accel_dev, timer_ms);
if (ret)
return ret;
ret = adf_heartbeat_ms_to_ticks(accel_dev, timer_ms, &ticks);
if (ret)
return ret;
ret = adf_send_admin_hb_timer(accel_dev, ticks);
if (ret)
return ret;
accel_dev->heartbeat->hb_timer = timer_ms;
}
return written_chars;
}
static const struct file_operations adf_hb_cfg_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = adf_hb_cfg_read,
.write = adf_hb_cfg_write,
};
void adf_heartbeat_dbgfs_add(struct adf_accel_dev *accel_dev)
{
struct adf_heartbeat *hb = accel_dev->heartbeat;
if (!hb)
return;
hb->dbgfs.base_dir = debugfs_create_dir("heartbeat", accel_dev->debugfs_dir);
hb->dbgfs.status = debugfs_create_file("status", 0400, hb->dbgfs.base_dir,
accel_dev, &adf_hb_status_fops);
hb->dbgfs.sent = debugfs_create_file("queries_sent", 0400, hb->dbgfs.base_dir,
&hb->hb_sent_counter, &adf_hb_stats_fops);
hb->dbgfs.failed = debugfs_create_file("queries_failed", 0400, hb->dbgfs.base_dir,
&hb->hb_failed_counter, &adf_hb_stats_fops);
hb->dbgfs.cfg = debugfs_create_file("config", 0600, hb->dbgfs.base_dir,
accel_dev, &adf_hb_cfg_fops);
}
EXPORT_SYMBOL_GPL(adf_heartbeat_dbgfs_add);
void adf_heartbeat_dbgfs_rm(struct adf_accel_dev *accel_dev)
{
struct adf_heartbeat *hb = accel_dev->heartbeat;
if (!hb)
return;
debugfs_remove(hb->dbgfs.status);
hb->dbgfs.status = NULL;
debugfs_remove(hb->dbgfs.sent);
hb->dbgfs.sent = NULL;
debugfs_remove(hb->dbgfs.failed);
hb->dbgfs.failed = NULL;
debugfs_remove(hb->dbgfs.cfg);
hb->dbgfs.cfg = NULL;
debugfs_remove(hb->dbgfs.base_dir);
hb->dbgfs.base_dir = NULL;
}
EXPORT_SYMBOL_GPL(adf_heartbeat_dbgfs_rm);
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