From: Salil Mehta <salil.mehta@huawei.com>
To: <davem@davemloft.net>
Cc: <salil.mehta@huawei.com>, <yisen.zhuang@huawei.com>,
<lipeng321@huawei.com>, <mehta.salil@opnsrc.net>,
<netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linuxarm@huawei.com>, liuzhongzhu <liuzhongzhu@huawei.com>
Subject: [PATCH V2 net-next 1/8] net: hns3: Add debugfs framework registration
Date: Thu, 22 Nov 2018 14:09:41 +0000 [thread overview]
Message-ID: <20181122140948.23504-2-salil.mehta@huawei.com> (raw)
In-Reply-To: <20181122140948.23504-1-salil.mehta@huawei.com>
From: liuzhongzhu <liuzhongzhu@huawei.com>
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: liuzhongzhu <liuzhongzhu@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
---
drivers/net/ethernet/hisilicon/hns3/Makefile | 2 +-
drivers/net/ethernet/hisilicon/hns3/hnae3.h | 1 +
drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c | 136 +++++++++++++++++++++
drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 17 ++-
drivers/net/ethernet/hisilicon/hns3/hns3_enet.h | 4 +
5 files changed, 157 insertions(+), 3 deletions(-)
create mode 100644 drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c
diff --git a/drivers/net/ethernet/hisilicon/hns3/Makefile b/drivers/net/ethernet/hisilicon/hns3/Makefile
index 002534f..d01bf53 100644
--- a/drivers/net/ethernet/hisilicon/hns3/Makefile
+++ b/drivers/net/ethernet/hisilicon/hns3/Makefile
@@ -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
diff --git a/drivers/net/ethernet/hisilicon/hns3/hnae3.h b/drivers/net/ethernet/hisilicon/hns3/hnae3.h
index 4a39fea..f32f075 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hnae3.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hnae3.h
@@ -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) \
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c b/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c
new file mode 100644
index 0000000..9d9ad11
--- /dev/null
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c
@@ -0,0 +1,136 @@
+// 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;
+}
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 7f81db3..d1b2de2 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -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);
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
index bbf227b..4e4b48b 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.h
@@ -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
--
2.7.4
next prev parent reply other threads:[~2018-11-22 14:12 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-22 14:09 [PATCH V2 net-next 0/8] net: hns3: Adds support of debugfs to HNS3 driver Salil Mehta
2018-11-22 14:09 ` Salil Mehta [this message]
2018-11-22 14:09 ` [PATCH V2 net-next 2/8] net: hns3: Add "queue info" query function Salil Mehta
2018-11-22 14:09 ` [PATCH V2 net-next 3/8] net: hns3: Add "FD flow table" info " Salil Mehta
2018-11-22 14:09 ` [PATCH V2 net-next 4/8] net: hns3: Add "tc config" " Salil Mehta
2018-11-22 14:09 ` [PATCH V2 net-next 5/8] net: hns3: Add "tm " Salil Mehta
2018-11-22 14:09 ` [PATCH V2 net-next 6/8] net: hns3: Add "qos pause" config " Salil Mehta
2018-11-22 14:09 ` [PATCH V2 net-next 7/8] net: hns3: Add "qos prio map" " Salil Mehta
2018-11-22 14:09 ` [PATCH V2 net-next 8/8] net: hns3: Add "qos buffer" config " Salil Mehta
2018-11-24 1:29 ` [PATCH V2 net-next 0/8] net: hns3: Adds support of debugfs to HNS3 driver David Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20181122140948.23504-2-salil.mehta@huawei.com \
--to=salil.mehta@huawei.com \
--cc=davem@davemloft.net \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxarm@huawei.com \
--cc=lipeng321@huawei.com \
--cc=liuzhongzhu@huawei.com \
--cc=mehta.salil@opnsrc.net \
--cc=netdev@vger.kernel.org \
--cc=yisen.zhuang@huawei.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).