1 files changed, 265 insertions, 0 deletions
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 000000000000..86d667a3730a
--- /dev/null
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_debugfs.c
@@ -0,0 +1,265 @@
+// 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 int hns3_dbg_queue_info(struct hnae3_handle *h, char *cmd_buf)
+{
+	struct hns3_nic_priv *priv = h->priv;
+	struct hns3_nic_ring_data *ring_data;
+	struct hns3_enet_ring *ring;
+	u32 base_add_l, base_add_h;
+	u32 queue_num, queue_max;
+	u32 value, i = 0;
+	int cnt;
+
+	if (!priv->ring_data) {
+		dev_err(&h->pdev->dev, "ring_data is NULL\n");
+		return -EFAULT;
+	}
+
+	queue_max = h->kinfo.num_tqps;
+	cnt = kstrtouint(&cmd_buf[11], 0, &queue_num);
+	if (cnt)
+		queue_num = 0;
+	else
+		queue_max = queue_num + 1;
+
+	dev_info(&h->pdev->dev, "queue info\n");
+
+	if (queue_num >= h->kinfo.num_tqps) {
+		dev_err(&h->pdev->dev,
+			"Queue number(%u) is out of range(%u)\n", queue_num,
+			h->kinfo.num_tqps - 1);
+		return -EINVAL;
+	}
+
+	ring_data = priv->ring_data;
+	for (i = queue_num; i < queue_max; i++) {
+		/* Each cycle needs to determine whether the instance is reset,
+		 * to prevent reference to invalid memory. And need to ensure
+		 * that the following code is executed within 100ms.
+		 */
+		if (test_bit(HNS3_NIC_STATE_INITED, &priv->state) ||
+		    test_bit(HNS3_NIC_STATE_RESETTING, &priv->state))
+			return -EPERM;
+
+		ring = ring_data[i + h->kinfo.num_tqps].ring;
+		base_add_h = readl_relaxed(ring->tqp->io_base +
+					   HNS3_RING_RX_RING_BASEADDR_H_REG);
+		base_add_l = readl_relaxed(ring->tqp->io_base +
+					   HNS3_RING_RX_RING_BASEADDR_L_REG);
+		dev_info(&h->pdev->dev, "RX(%d) BASE ADD: 0x%08x%08x\n", i,
+			 base_add_h, base_add_l);
+
+		value = readl_relaxed(ring->tqp->io_base +
+				      HNS3_RING_RX_RING_BD_NUM_REG);
+		dev_info(&h->pdev->dev, "RX(%d) RING BD NUM: %u\n", i, value);
+
+		value = readl_relaxed(ring->tqp->io_base +
+				      HNS3_RING_RX_RING_BD_LEN_REG);
+		dev_info(&h->pdev->dev, "RX(%d) RING BD LEN: %u\n", i, value);
+
+		value = readl_relaxed(ring->tqp->io_base +
+				      HNS3_RING_RX_RING_TAIL_REG);
+		dev_info(&h->pdev->dev, "RX(%d) RING TAIL: %u\n", i, value);
+
+		value = readl_relaxed(ring->tqp->io_base +
+				      HNS3_RING_RX_RING_HEAD_REG);
+		dev_info(&h->pdev->dev, "RX(%d) RING HEAD: %u\n", i, value);
+
+		value = readl_relaxed(ring->tqp->io_base +
+				      HNS3_RING_RX_RING_FBDNUM_REG);
+		dev_info(&h->pdev->dev, "RX(%d) RING FBDNUM: %u\n", i, value);
+
+		value = readl_relaxed(ring->tqp->io_base +
+				      HNS3_RING_RX_RING_PKTNUM_RECORD_REG);
+		dev_info(&h->pdev->dev, "RX(%d) RING PKTNUM: %u\n", i, value);
+
+		ring = ring_data[i].ring;
+		base_add_h = readl_relaxed(ring->tqp->io_base +
+					   HNS3_RING_TX_RING_BASEADDR_H_REG);
+		base_add_l = readl_relaxed(ring->tqp->io_base +
+					   HNS3_RING_TX_RING_BASEADDR_L_REG);
+		dev_info(&h->pdev->dev, "TX(%d) BASE ADD: 0x%08x%08x\n", i,
+			 base_add_h, base_add_l);
+
+		value = readl_relaxed(ring->tqp->io_base +
+				      HNS3_RING_TX_RING_BD_NUM_REG);
+		dev_info(&h->pdev->dev, "TX(%d) RING BD NUM: %u\n", i, value);
+
+		value = readl_relaxed(ring->tqp->io_base +
+				      HNS3_RING_TX_RING_TC_REG);
+		dev_info(&h->pdev->dev, "TX(%d) RING TC: %u\n", i, value);
+
+		value = readl_relaxed(ring->tqp->io_base +
+				      HNS3_RING_TX_RING_TAIL_REG);
+		dev_info(&h->pdev->dev, "TX(%d) RING TAIL: %u\n", i, value);
+
+		value = readl_relaxed(ring->tqp->io_base +
+				      HNS3_RING_TX_RING_HEAD_REG);
+		dev_info(&h->pdev->dev, "TX(%d) RING HEAD: %u\n", i, value);
+
+		value = readl_relaxed(ring->tqp->io_base +
+				      HNS3_RING_TX_RING_FBDNUM_REG);
+		dev_info(&h->pdev->dev, "TX(%d) RING FBDNUM: %u\n", i, value);
+
+		value = readl_relaxed(ring->tqp->io_base +
+				      HNS3_RING_TX_RING_OFFSET_REG);
+		dev_info(&h->pdev->dev, "TX(%d) RING OFFSET: %u\n", i, value);
+
+		value = readl_relaxed(ring->tqp->io_base +
+				      HNS3_RING_TX_RING_PKTNUM_RECORD_REG);
+		dev_info(&h->pdev->dev, "TX(%d) RING PKTNUM: %u\n\n", i,
+			 value);
+	}
+
+	return 0;
+}
+
+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");
+	dev_info(&h->pdev->dev, "dump tc\n");
+	dev_info(&h->pdev->dev, "dump tm\n");
+	dev_info(&h->pdev->dev, "dump qos pause cfg\n");
+	dev_info(&h->pdev->dev, "dump qos pri map\n");
+	dev_info(&h->pdev->dev, "dump qos buf cfg\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;
+	struct hns3_nic_priv *priv  = handle->priv;
+	char *cmd_buf, *cmd_buf_tmp;
+	int uncopied_bytes;
+	int ret = 0;
+
+	if (*ppos != 0)
+		return 0;
+
+	/* Judge if the instance is being reset. */
+	if (test_bit(HNS3_NIC_STATE_INITED, &priv->state) ||
+	    test_bit(HNS3_NIC_STATE_RESETTING, &priv->state))
+		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);
+	else if (strncmp(cmd_buf, "queue info", 10) == 0)
+		ret = hns3_dbg_queue_info(handle, cmd_buf);
+	else if (handle->ae_algo->ops->dbg_run_cmd)
+		ret = handle->ae_algo->ops->dbg_run_cmd(handle, cmd_buf);
+
+	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;
+}