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Message-ID: <20170610034630.493852-9-salil.mehta@huawei.com>
Date: Sat, 10 Jun 2017 04:46:29 +0100
From: Salil Mehta <salil.mehta@...wei.com>
To: <davem@...emloft.net>
CC: <salil.mehta@...wei.com>, <yisen.zhuang@...wei.com>,
<huangdaode@...ilicon.com>, <lipeng321@...wei.com>,
<mehta.salil.lnk@...il.com>, <netdev@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linuxarm@...wei.com>
Subject: [PATCH net-next 8/9] net: hns3: Add support of debugfs interface to HNS3 driver
This adds the support of the debugfs interface to the driver for
debugging purposes.
Signed-off-by: Daode Huang <huangdaode@...ilicon.com>
Signed-off-by: lipeng <lipeng321@...wei.com>
Signed-off-by: Salil Mehta <salil.mehta@...wei.com>
Signed-off-by: Yisen Zhuang <yisen.zhuang@...wei.com>
---
.../ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c | 188 +++++++++++++++++++++
1 file changed, 188 insertions(+)
create mode 100644 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c
new file mode 100644
index 0000000..8ef5a41
--- /dev/null
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_debugfs.c
@@ -0,0 +1,188 @@
+/*
+ * Copyright (c) 2016~2017 Hisilicon Limited.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/debugfs.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/dma-direction.h>
+#include "hclge_cmd.h"
+#include "hclge_main.h"
+#include "hnae3.h"
+
+static struct dentry *hclge_dbgfs_root;
+static int hclge_dbg_usage(struct hclge_dev *hdev, char *data);
+#define HCLGE_DBG_READ_LEN 256
+
+struct hclge_support_cmd {
+ char *name;
+ int len;
+ int (*fn)(struct hclge_dev *hdev, char *data);
+ char *param;
+};
+
+static int hclge_dbg_send(struct hclge_dev *hdev, char *buf)
+{
+ struct hclge_desc desc;
+ enum hclge_cmd_status status;
+ int cnt;
+
+ cnt = sscanf(buf, "%hi %hi %i %i %i %i %i %i",
+ &desc.opcode, &desc.flag,
+ &desc.data[0], &desc.data[1], &desc.data[2],
+ &desc.data[3], &desc.data[4], &desc.data[5]);
+ if (cnt != 8) {
+ dev_info(&hdev->pdev->dev,
+ "send cmd: bad command parameter, cnt=%d\n", cnt);
+ return -EINVAL;
+ }
+
+ status = hclge_cmd_send(&hdev->hw, &desc, 1);
+ if (status) {
+ dev_info(&hdev->pdev->dev,
+ "send comamnd fail Opcode:%x, Status:%d\n",
+ desc.opcode, status);
+ }
+ dev_info(&hdev->pdev->dev, "get response:\n");
+ dev_info(&hdev->pdev->dev, "opcode:%04x\tflag:%04x\tretval:%04x\t\n",
+ desc.opcode, desc.flag, desc.retval);
+ dev_info(&hdev->pdev->dev, "data[0~2]:%08x\t%08x\t%08x\n",
+ desc.data[0], desc.data[1], desc.data[2]);
+ dev_info(&hdev->pdev->dev, "data[3-5]:%08x\t%08x\t%08x\n",
+ desc.data[3], desc.data[4], desc.data[5]);
+ return 0;
+}
+
+const struct hclge_support_cmd support_cmd[] = {
+ {"send cmd", 8, hclge_dbg_send,
+ "opcode flag data0 data1 data2 data3 data4 data5"},
+ {"help", 4, hclge_dbg_usage, "no option"},
+};
+
+static int hclge_dbg_usage(struct hclge_dev *hdev, char *data)
+{
+ int i;
+
+ pr_info("supported cmd list:\n");
+ for (i = 0; i < ARRAY_SIZE(support_cmd); i++)
+ pr_info("%s: %s\n", support_cmd[i].name, support_cmd[i].param);
+
+ return 0;
+}
+
+static ssize_t hclge_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 < HCLGE_DBG_READ_LEN)
+ return -ENOSPC;
+ buf = kzalloc(HCLGE_DBG_READ_LEN, GFP_KERNEL);
+ if (!buf)
+ return -ENOSPC;
+
+ len = snprintf(buf, HCLGE_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;
+
+ *ppos = len;
+ return len;
+}
+
+static ssize_t hclge_dbg_cmd_write(struct file *filp, const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ struct hclge_dev *hdev = filp->private_data;
+ char *cmd_buf, *cmd_buf_tmp;
+ int uncopied_bytes;
+ int i;
+
+ 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;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(support_cmd); i++) {
+ if (strncmp(cmd_buf, support_cmd[i].name,
+ support_cmd[i].len) == 0) {
+ support_cmd[i].fn(hdev, &cmd_buf[support_cmd[i].len]);
+ break;
+ }
+ }
+
+ kfree(cmd_buf);
+ cmd_buf = NULL;
+ return count;
+}
+
+static const struct file_operations hclge_dbg_cmd_fops = {
+ .owner = THIS_MODULE,
+ .open = simple_open,
+ .read = hclge_dbg_cmd_read,
+ .write = hclge_dbg_cmd_write,
+};
+
+void hclge_dbg_init(struct hclge_dev *hdev)
+{
+ struct dentry *pfile;
+ const char *name = pci_name(hdev->pdev);
+
+ hdev->hclge_dbgfs = debugfs_create_dir(name, hclge_dbgfs_root);
+ if (!hdev->hclge_dbgfs)
+ return;
+ pfile = debugfs_create_file("cmd", 0600, hdev->hclge_dbgfs, hdev,
+ &hclge_dbg_cmd_fops);
+ if (!pfile)
+ dev_info(&hdev->pdev->dev, "create file for %s fail\n", name);
+}
+
+void hclge_dbg_uninit(struct hclge_dev *hdev)
+{
+ debugfs_remove_recursive(hdev->hclge_dbgfs);
+ hdev->hclge_dbgfs = NULL;
+}
+
+void hclge_register_debugfs(void)
+{
+ hclge_dbgfs_root = debugfs_create_dir(HCLGE_DRIVER_NAME, NULL);
+ if (!hclge_dbgfs_root) {
+ pr_info("register debugfs for %s fail\n", HCLGE_DRIVER_NAME);
+ return;
+ }
+ pr_info("register debugfs root dir %s\n", HCLGE_DRIVER_NAME);
+}
+
+void hclge_unregister_debugfs(void)
+{
+ debugfs_remove_recursive(hclge_dbgfs_root);
+ hclge_dbgfs_root = NULL;
+}
--
2.7.4
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