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// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 1999 - 2018 Intel Corporation. */
#include <linux/debugfs.h>
#include <linux/module.h>
#include "ixgbe.h"
static struct dentry *ixgbe_dbg_root;
static char ixgbe_dbg_reg_ops_buf[256] = "";
static ssize_t ixgbe_dbg_common_ops_read(struct file *filp, char __user *buffer,
size_t count, loff_t *ppos,
char *dbg_buf)
{
struct ixgbe_adapter *adapter = filp->private_data;
char *buf;
int len;
/* don't allow partial reads */
if (*ppos != 0)
return 0;
buf = kasprintf(GFP_KERNEL, "%s: %s\n",
adapter->netdev->name, dbg_buf);
if (!buf)
return -ENOMEM;
if (count < strlen(buf)) {
kfree(buf);
return -ENOSPC;
}
len = simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));
kfree(buf);
return len;
}
/**
* ixgbe_dbg_reg_ops_read - read for reg_ops datum
* @filp: the opened file
* @buffer: where to write the data for the user to read
* @count: the size of the user's buffer
* @ppos: file position offset
**/
static ssize_t ixgbe_dbg_reg_ops_read(struct file *filp, char __user *buffer,
size_t count, loff_t *ppos)
{
return ixgbe_dbg_common_ops_read(filp, buffer, count, ppos,
ixgbe_dbg_reg_ops_buf);
}
/**
* ixgbe_dbg_reg_ops_write - write into reg_ops datum
* @filp: the opened file
* @buffer: where to find the user's data
* @count: the length of the user's data
* @ppos: file position offset
**/
static ssize_t ixgbe_dbg_reg_ops_write(struct file *filp,
const char __user *buffer,
size_t count, loff_t *ppos)
{
struct ixgbe_adapter *adapter = filp->private_data;
int len;
/* don't allow partial writes */
if (*ppos != 0)
return 0;
if (count >= sizeof(ixgbe_dbg_reg_ops_buf))
return -ENOSPC;
len = simple_write_to_buffer(ixgbe_dbg_reg_ops_buf,
sizeof(ixgbe_dbg_reg_ops_buf)-1,
ppos,
buffer,
count);
if (len < 0)
return len;
ixgbe_dbg_reg_ops_buf[len] = '\0';
if (strncmp(ixgbe_dbg_reg_ops_buf, "write", 5) == 0) {
u32 reg, value;
int cnt;
cnt = sscanf(&ixgbe_dbg_reg_ops_buf[5], "%x %x", ®, &value);
if (cnt == 2) {
IXGBE_WRITE_REG(&adapter->hw, reg, value);
value = IXGBE_READ_REG(&adapter->hw, reg);
e_dev_info("write: 0x%08x = 0x%08x\n", reg, value);
} else {
e_dev_info("write <reg> <value>\n");
}
} else if (strncmp(ixgbe_dbg_reg_ops_buf, "read", 4) == 0) {
u32 reg, value;
int cnt;
cnt = sscanf(&ixgbe_dbg_reg_ops_buf[4], "%x", ®);
if (cnt == 1) {
value = IXGBE_READ_REG(&adapter->hw, reg);
e_dev_info("read 0x%08x = 0x%08x\n", reg, value);
} else {
e_dev_info("read <reg>\n");
}
} else {
e_dev_info("Unknown command %s\n", ixgbe_dbg_reg_ops_buf);
e_dev_info("Available commands:\n");
e_dev_info(" read <reg>\n");
e_dev_info(" write <reg> <value>\n");
}
return count;
}
static const struct file_operations ixgbe_dbg_reg_ops_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = ixgbe_dbg_reg_ops_read,
.write = ixgbe_dbg_reg_ops_write,
};
static char ixgbe_dbg_netdev_ops_buf[256] = "";
/**
* ixgbe_dbg_netdev_ops_read - read for netdev_ops datum
* @filp: the opened file
* @buffer: where to write the data for the user to read
* @count: the size of the user's buffer
* @ppos: file position offset
**/
static ssize_t ixgbe_dbg_netdev_ops_read(struct file *filp, char __user *buffer,
size_t count, loff_t *ppos)
{
return ixgbe_dbg_common_ops_read(filp, buffer, count, ppos,
ixgbe_dbg_netdev_ops_buf);
}
/**
* ixgbe_dbg_netdev_ops_write - write into netdev_ops datum
* @filp: the opened file
* @buffer: where to find the user's data
* @count: the length of the user's data
* @ppos: file position offset
**/
static ssize_t ixgbe_dbg_netdev_ops_write(struct file *filp,
const char __user *buffer,
size_t count, loff_t *ppos)
{
struct ixgbe_adapter *adapter = filp->private_data;
int len;
/* don't allow partial writes */
if (*ppos != 0)
return 0;
if (count >= sizeof(ixgbe_dbg_netdev_ops_buf))
return -ENOSPC;
len = simple_write_to_buffer(ixgbe_dbg_netdev_ops_buf,
sizeof(ixgbe_dbg_netdev_ops_buf)-1,
ppos,
buffer,
count);
if (len < 0)
return len;
ixgbe_dbg_netdev_ops_buf[len] = '\0';
if (strncmp(ixgbe_dbg_netdev_ops_buf, "tx_timeout", 10) == 0) {
/* TX Queue number below is wrong, but ixgbe does not use it */
adapter->netdev->netdev_ops->ndo_tx_timeout(adapter->netdev,
UINT_MAX);
e_dev_info("tx_timeout called\n");
} else {
e_dev_info("Unknown command: %s\n", ixgbe_dbg_netdev_ops_buf);
e_dev_info("Available commands:\n");
e_dev_info(" tx_timeout\n");
}
return count;
}
static const struct file_operations ixgbe_dbg_netdev_ops_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = ixgbe_dbg_netdev_ops_read,
.write = ixgbe_dbg_netdev_ops_write,
};
/**
* ixgbe_dbg_adapter_init - setup the debugfs directory for the adapter
* @adapter: the adapter that is starting up
**/
void ixgbe_dbg_adapter_init(struct ixgbe_adapter *adapter)
{
const char *name = pci_name(adapter->pdev);
adapter->ixgbe_dbg_adapter = debugfs_create_dir(name, ixgbe_dbg_root);
debugfs_create_file("reg_ops", 0600, adapter->ixgbe_dbg_adapter,
adapter, &ixgbe_dbg_reg_ops_fops);
debugfs_create_file("netdev_ops", 0600, adapter->ixgbe_dbg_adapter,
adapter, &ixgbe_dbg_netdev_ops_fops);
}
/**
* ixgbe_dbg_adapter_exit - clear out the adapter's debugfs entries
* @adapter: the adapter that is exiting
**/
void ixgbe_dbg_adapter_exit(struct ixgbe_adapter *adapter)
{
debugfs_remove_recursive(adapter->ixgbe_dbg_adapter);
adapter->ixgbe_dbg_adapter = NULL;
}
/**
* ixgbe_dbg_init - start up debugfs for the driver
**/
void ixgbe_dbg_init(void)
{
ixgbe_dbg_root = debugfs_create_dir(ixgbe_driver_name, NULL);
}
/**
* ixgbe_dbg_exit - clean out the driver's debugfs entries
**/
void ixgbe_dbg_exit(void)
{
debugfs_remove_recursive(ixgbe_dbg_root);
}
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