301 lines
8.3 KiB
C
301 lines
8.3 KiB
C
/*******************************************************************************
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Intel 10 Gigabit PCI Express Linux driver
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Copyright(c) 1999 - 2012 Intel Corporation.
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This program is free software; you can redistribute it and/or modify it
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under the terms and conditions of the GNU General Public License,
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version 2, as published by the Free Software Foundation.
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This program is distributed in the hope it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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The full GNU General Public License is included in this distribution in
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the file called "COPYING".
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Contact Information:
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e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
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Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*******************************************************************************/
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#ifdef CONFIG_DEBUG_FS
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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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/**
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* ixgbe_dbg_reg_ops_open - prep the debugfs pokee data item when opened
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* @inode: inode that was opened
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* @filp: file info
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*
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* Stash the adapter pointer hiding in the inode into the file pointer where
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* we can find it later in the read and write calls
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**/
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static int ixgbe_dbg_reg_ops_open(struct inode *inode, struct file *filp)
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{
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filp->private_data = inode->i_private;
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return 0;
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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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struct ixgbe_adapter *adapter = filp->private_data;
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char buf[256];
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int bytes_not_copied;
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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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len = snprintf(buf, sizeof(buf), "%s: %s\n",
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adapter->netdev->name, ixgbe_dbg_reg_ops_buf);
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if (count < len)
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return -ENOSPC;
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bytes_not_copied = copy_to_user(buffer, buf, len);
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if (bytes_not_copied < 0)
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return bytes_not_copied;
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*ppos = len;
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return len;
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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 bytes_not_copied;
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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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bytes_not_copied = copy_from_user(ixgbe_dbg_reg_ops_buf, buffer, count);
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if (bytes_not_copied < 0)
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return bytes_not_copied;
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else if (bytes_not_copied < count)
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count -= bytes_not_copied;
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else
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return -ENOSPC;
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ixgbe_dbg_reg_ops_buf[count] = '\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 = ixgbe_dbg_reg_ops_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_open - prep the debugfs netdev_ops data item
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* @inode: inode that was opened
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* @filp: file info
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*
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* Stash the adapter pointer hiding in the inode into the file pointer
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* where we can find it later in the read and write calls
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**/
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static int ixgbe_dbg_netdev_ops_open(struct inode *inode, struct file *filp)
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{
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filp->private_data = inode->i_private;
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return 0;
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}
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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,
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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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char buf[256];
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int bytes_not_copied;
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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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len = snprintf(buf, sizeof(buf), "%s: %s\n",
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adapter->netdev->name, ixgbe_dbg_netdev_ops_buf);
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if (count < len)
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return -ENOSPC;
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bytes_not_copied = copy_to_user(buffer, buf, len);
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if (bytes_not_copied < 0)
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return bytes_not_copied;
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*ppos = len;
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return len;
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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 bytes_not_copied;
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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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bytes_not_copied = copy_from_user(ixgbe_dbg_netdev_ops_buf,
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buffer, count);
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if (bytes_not_copied < 0)
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return bytes_not_copied;
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else if (bytes_not_copied < count)
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count -= bytes_not_copied;
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else
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return -ENOSPC;
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ixgbe_dbg_netdev_ops_buf[count] = '\0';
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if (strncmp(ixgbe_dbg_netdev_ops_buf, "tx_timeout", 10) == 0) {
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adapter->netdev->netdev_ops->ndo_tx_timeout(adapter->netdev);
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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 = ixgbe_dbg_netdev_ops_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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struct dentry *pfile;
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adapter->ixgbe_dbg_adapter = debugfs_create_dir(name, ixgbe_dbg_root);
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if (adapter->ixgbe_dbg_adapter) {
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pfile = debugfs_create_file("reg_ops", 0600,
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adapter->ixgbe_dbg_adapter, adapter,
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&ixgbe_dbg_reg_ops_fops);
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if (!pfile)
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e_dev_err("debugfs reg_ops for %s failed\n", name);
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pfile = debugfs_create_file("netdev_ops", 0600,
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adapter->ixgbe_dbg_adapter, adapter,
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&ixgbe_dbg_netdev_ops_fops);
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if (!pfile)
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e_dev_err("debugfs netdev_ops for %s failed\n", name);
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} else {
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e_dev_err("debugfs entry for %s failed\n", name);
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}
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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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* @pf: the pf that is stopping
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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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if (adapter->ixgbe_dbg_adapter)
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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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if (ixgbe_dbg_root == NULL)
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pr_err("init of debugfs failed\n");
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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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#endif /* CONFIG_DEBUG_FS */
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