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