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// SPDX-License-Identifier: GPL-2.0-only
/*
* Intel Wireless WiMAX Connection 2400m
* Debugfs interfaces to manipulate driver and device information
*
* Copyright (C) 2007 Intel Corporation <linux-wimax@intel.com>
* Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
*/
#include <linux/debugfs.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/spinlock.h>
#include <linux/device.h>
#include <linux/export.h>
#include "i2400m.h"
#define D_SUBMODULE debugfs
#include "debug-levels.h"
static
int debugfs_netdev_queue_stopped_get(void *data, u64 *val)
{
struct i2400m *i2400m = data;
*val = netif_queue_stopped(i2400m->wimax_dev.net_dev);
return 0;
}
DEFINE_DEBUGFS_ATTRIBUTE(fops_netdev_queue_stopped,
debugfs_netdev_queue_stopped_get,
NULL, "%llu\n");
/*
* We don't allow partial reads of this file, as then the reader would
* get weirdly confused data as it is updated.
*
* So or you read it all or nothing; if you try to read with an offset
* != 0, we consider you are done reading.
*/
static
ssize_t i2400m_rx_stats_read(struct file *filp, char __user *buffer,
size_t count, loff_t *ppos)
{
struct i2400m *i2400m = filp->private_data;
char buf[128];
unsigned long flags;
if (*ppos != 0)
return 0;
if (count < sizeof(buf))
return -ENOSPC;
spin_lock_irqsave(&i2400m->rx_lock, flags);
snprintf(buf, sizeof(buf), "%u %u %u %u %u %u %u\n",
i2400m->rx_pl_num, i2400m->rx_pl_min,
i2400m->rx_pl_max, i2400m->rx_num,
i2400m->rx_size_acc,
i2400m->rx_size_min, i2400m->rx_size_max);
spin_unlock_irqrestore(&i2400m->rx_lock, flags);
return simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));
}
/* Any write clears the stats */
static
ssize_t i2400m_rx_stats_write(struct file *filp, const char __user *buffer,
size_t count, loff_t *ppos)
{
struct i2400m *i2400m = filp->private_data;
unsigned long flags;
spin_lock_irqsave(&i2400m->rx_lock, flags);
i2400m->rx_pl_num = 0;
i2400m->rx_pl_max = 0;
i2400m->rx_pl_min = UINT_MAX;
i2400m->rx_num = 0;
i2400m->rx_size_acc = 0;
i2400m->rx_size_min = UINT_MAX;
i2400m->rx_size_max = 0;
spin_unlock_irqrestore(&i2400m->rx_lock, flags);
return count;
}
static
const struct file_operations i2400m_rx_stats_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = i2400m_rx_stats_read,
.write = i2400m_rx_stats_write,
.llseek = default_llseek,
};
/* See i2400m_rx_stats_read() */
static
ssize_t i2400m_tx_stats_read(struct file *filp, char __user *buffer,
size_t count, loff_t *ppos)
{
struct i2400m *i2400m = filp->private_data;
char buf[128];
unsigned long flags;
if (*ppos != 0)
return 0;
if (count < sizeof(buf))
return -ENOSPC;
spin_lock_irqsave(&i2400m->tx_lock, flags);
snprintf(buf, sizeof(buf), "%u %u %u %u %u %u %u\n",
i2400m->tx_pl_num, i2400m->tx_pl_min,
i2400m->tx_pl_max, i2400m->tx_num,
i2400m->tx_size_acc,
i2400m->tx_size_min, i2400m->tx_size_max);
spin_unlock_irqrestore(&i2400m->tx_lock, flags);
return simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));
}
/* Any write clears the stats */
static
ssize_t i2400m_tx_stats_write(struct file *filp, const char __user *buffer,
size_t count, loff_t *ppos)
{
struct i2400m *i2400m = filp->private_data;
unsigned long flags;
spin_lock_irqsave(&i2400m->tx_lock, flags);
i2400m->tx_pl_num = 0;
i2400m->tx_pl_max = 0;
i2400m->tx_pl_min = UINT_MAX;
i2400m->tx_num = 0;
i2400m->tx_size_acc = 0;
i2400m->tx_size_min = UINT_MAX;
i2400m->tx_size_max = 0;
spin_unlock_irqrestore(&i2400m->tx_lock, flags);
return count;
}
static
const struct file_operations i2400m_tx_stats_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = i2400m_tx_stats_read,
.write = i2400m_tx_stats_write,
.llseek = default_llseek,
};
/* Write 1 to ask the device to go into suspend */
static
int debugfs_i2400m_suspend_set(void *data, u64 val)
{
int result;
struct i2400m *i2400m = data;
result = i2400m_cmd_enter_powersave(i2400m);
if (result >= 0)
result = 0;
return result;
}
DEFINE_DEBUGFS_ATTRIBUTE(fops_i2400m_suspend,
NULL, debugfs_i2400m_suspend_set,
"%llu\n");
/*
* Reset the device
*
* Write 0 to ask the device to soft reset, 1 to cold reset, 2 to bus
* reset (as defined by enum i2400m_reset_type).
*/
static
int debugfs_i2400m_reset_set(void *data, u64 val)
{
int result;
struct i2400m *i2400m = data;
enum i2400m_reset_type rt = val;
switch(rt) {
case I2400M_RT_WARM:
case I2400M_RT_COLD:
case I2400M_RT_BUS:
result = i2400m_reset(i2400m, rt);
if (result >= 0)
result = 0;
break;
default:
result = -EINVAL;
}
return result;
}
DEFINE_DEBUGFS_ATTRIBUTE(fops_i2400m_reset,
NULL, debugfs_i2400m_reset_set,
"%llu\n");
void i2400m_debugfs_add(struct i2400m *i2400m)
{
struct dentry *dentry = i2400m->wimax_dev.debugfs_dentry;
dentry = debugfs_create_dir("i2400m", dentry);
i2400m->debugfs_dentry = dentry;
d_level_register_debugfs("dl_", control, dentry);
d_level_register_debugfs("dl_", driver, dentry);
d_level_register_debugfs("dl_", debugfs, dentry);
d_level_register_debugfs("dl_", fw, dentry);
d_level_register_debugfs("dl_", netdev, dentry);
d_level_register_debugfs("dl_", rfkill, dentry);
d_level_register_debugfs("dl_", rx, dentry);
d_level_register_debugfs("dl_", tx, dentry);
debugfs_create_size_t("tx_in", 0400, dentry, &i2400m->tx_in);
debugfs_create_size_t("tx_out", 0400, dentry, &i2400m->tx_out);
debugfs_create_u32("state", 0600, dentry, &i2400m->state);
/*
* Trace received messages from user space
*
* In order to tap the bidirectional message stream in the
* 'msg' pipe, user space can read from the 'msg' pipe;
* however, due to limitations in libnl, we can't know what
* the different applications are sending down to the kernel.
*
* So we have this hack where the driver will echo any message
* received on the msg pipe from user space [through a call to
* wimax_dev->op_msg_from_user() into
* i2400m_op_msg_from_user()] into the 'trace' pipe that this
* driver creates.
*
* So then, reading from both the 'trace' and 'msg' pipes in
* user space will provide a full dump of the traffic.
*
* Write 1 to activate, 0 to clear.
*
* It is not really very atomic, but it is also not too
* critical.
*/
debugfs_create_u8("trace_msg_from_user", 0600, dentry,
&i2400m->trace_msg_from_user);
debugfs_create_file("netdev_queue_stopped", 0400, dentry, i2400m,
&fops_netdev_queue_stopped);
debugfs_create_file("rx_stats", 0600, dentry, i2400m,
&i2400m_rx_stats_fops);
debugfs_create_file("tx_stats", 0600, dentry, i2400m,
&i2400m_tx_stats_fops);
debugfs_create_file("suspend", 0200, dentry, i2400m,
&fops_i2400m_suspend);
debugfs_create_file("reset", 0200, dentry, i2400m, &fops_i2400m_reset);
}
void i2400m_debugfs_rm(struct i2400m *i2400m)
{
debugfs_remove_recursive(i2400m->debugfs_dentry);
}
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