Commit b2292360 authored by liuzhongzhu's avatar liuzhongzhu Committed by David S. Miller

net: hns3: Add debugfs framework registration

Add the debugfs framework to the driver and create a debugfs
command interface for each device.

example command:
"echo queue info > cmd" Query the packet forwarding queue information.
Signed-off-by: default avatarliuzhongzhu <liuzhongzhu@huawei.com>
Signed-off-by: default avatarSalil Mehta <salil.mehta@huawei.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 53b44cb9
......@@ -9,6 +9,6 @@ obj-$(CONFIG_HNS3) += hns3vf/
obj-$(CONFIG_HNS3) += hnae3.o
obj-$(CONFIG_HNS3_ENET) += hns3.o
hns3-objs = hns3_enet.o hns3_ethtool.o
hns3-objs = hns3_enet.o hns3_ethtool.o hns3_debugfs.o
hns3-$(CONFIG_HNS3_DCB) += hns3_dcbnl.o
......@@ -566,6 +566,7 @@ struct hnae3_handle {
u32 numa_node_mask; /* for multi-chip support */
u8 netdev_flags;
struct dentry *hnae3_dbgfs;
};
#define hnae3_set_field(origin, mask, shift, val) \
......
// SPDX-License-Identifier: GPL-2.0+
/* Copyright (c) 2018-2019 Hisilicon Limited. */
#include <linux/debugfs.h>
#include <linux/device.h>
#include "hnae3.h"
#include "hns3_enet.h"
#define HNS3_DBG_READ_LEN 256
static struct dentry *hns3_dbgfs_root;
static void hns3_dbg_help(struct hnae3_handle *h)
{
dev_info(&h->pdev->dev, "available commands\n");
dev_info(&h->pdev->dev, "queue info [number]\n");
dev_info(&h->pdev->dev, "dump fd tcam\n");
}
static ssize_t hns3_dbg_cmd_read(struct file *filp, char __user *buffer,
size_t count, loff_t *ppos)
{
int uncopy_bytes;
char *buf;
int len;
if (*ppos != 0)
return 0;
if (count < HNS3_DBG_READ_LEN)
return -ENOSPC;
buf = kzalloc(HNS3_DBG_READ_LEN, GFP_KERNEL);
if (!buf)
return -ENOMEM;
len = snprintf(buf, HNS3_DBG_READ_LEN, "%s\n",
"Please echo help to cmd to get help information");
uncopy_bytes = copy_to_user(buffer, buf, len);
kfree(buf);
if (uncopy_bytes)
return -EFAULT;
return (*ppos = len);
}
static ssize_t hns3_dbg_cmd_write(struct file *filp, const char __user *buffer,
size_t count, loff_t *ppos)
{
struct hnae3_handle *handle = filp->private_data;
char *cmd_buf, *cmd_buf_tmp;
int uncopied_bytes;
int ret = 0;
if (*ppos != 0)
return 0;
cmd_buf = kzalloc(count + 1, GFP_KERNEL);
if (!cmd_buf)
return count;
uncopied_bytes = copy_from_user(cmd_buf, buffer, count);
if (uncopied_bytes) {
kfree(cmd_buf);
return -EFAULT;
}
cmd_buf[count] = '\0';
cmd_buf_tmp = strchr(cmd_buf, '\n');
if (cmd_buf_tmp) {
*cmd_buf_tmp = '\0';
count = cmd_buf_tmp - cmd_buf + 1;
}
if (strncmp(cmd_buf, "help", 4) == 0)
hns3_dbg_help(handle);
if (ret)
hns3_dbg_help(handle);
kfree(cmd_buf);
cmd_buf = NULL;
return count;
}
static const struct file_operations hns3_dbg_cmd_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = hns3_dbg_cmd_read,
.write = hns3_dbg_cmd_write,
};
void hns3_dbg_init(struct hnae3_handle *handle)
{
const char *name = pci_name(handle->pdev);
struct dentry *pfile;
handle->hnae3_dbgfs = debugfs_create_dir(name, hns3_dbgfs_root);
if (!handle->hnae3_dbgfs)
return;
pfile = debugfs_create_file("cmd", 0600, handle->hnae3_dbgfs, handle,
&hns3_dbg_cmd_fops);
if (!pfile) {
debugfs_remove_recursive(handle->hnae3_dbgfs);
handle->hnae3_dbgfs = NULL;
dev_warn(&handle->pdev->dev, "create file for %s fail\n",
name);
}
}
void hns3_dbg_uninit(struct hnae3_handle *handle)
{
debugfs_remove_recursive(handle->hnae3_dbgfs);
handle->hnae3_dbgfs = NULL;
}
void hns3_dbg_register_debugfs(const char *debugfs_dir_name)
{
hns3_dbgfs_root = debugfs_create_dir(debugfs_dir_name, NULL);
if (!hns3_dbgfs_root) {
pr_warn("Register debugfs for %s fail\n", debugfs_dir_name);
return;
}
}
void hns3_dbg_unregister_debugfs(void)
{
debugfs_remove_recursive(hns3_dbgfs_root);
hns3_dbgfs_root = NULL;
}
......@@ -3620,6 +3620,8 @@ static int hns3_client_init(struct hnae3_handle *handle)
hns3_dcbnl_setup(handle);
hns3_dbg_init(handle);
/* MTU range: (ETH_MIN_MTU(kernel default) - 9702) */
netdev->max_mtu = HNS3_MAX_MTU;
......@@ -3676,6 +3678,8 @@ static void hns3_client_uninit(struct hnae3_handle *handle, bool reset)
hns3_put_ring_config(priv);
hns3_dbg_uninit(handle);
priv->ring_data = NULL;
out_netdev_free:
......@@ -4245,15 +4249,23 @@ static int __init hns3_init_module(void)
INIT_LIST_HEAD(&client.node);
hns3_dbg_register_debugfs(hns3_driver_name);
ret = hnae3_register_client(&client);
if (ret)
return ret;
goto err_reg_client;
ret = pci_register_driver(&hns3_driver);
if (ret)
hnae3_unregister_client(&client);
goto err_reg_driver;
return ret;
err_reg_driver:
hnae3_unregister_client(&client);
err_reg_client:
hns3_dbg_unregister_debugfs();
return ret;
}
module_init(hns3_init_module);
......@@ -4265,6 +4277,7 @@ static void __exit hns3_exit_module(void)
{
pci_unregister_driver(&hns3_driver);
hnae3_unregister_client(&client);
hns3_dbg_unregister_debugfs();
}
module_exit(hns3_exit_module);
......
......@@ -683,4 +683,8 @@ void hns3_dcbnl_setup(struct hnae3_handle *handle);
static inline void hns3_dcbnl_setup(struct hnae3_handle *handle) {}
#endif
void hns3_dbg_init(struct hnae3_handle *handle);
void hns3_dbg_uninit(struct hnae3_handle *handle);
void hns3_dbg_register_debugfs(const char *debugfs_dir_name);
void hns3_dbg_unregister_debugfs(void);
#endif
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