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ixgbe: add debugfs support

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This patch adds debugfs support to the ixgbe driver to give
users the ability to access kernel information and to
simulate kernel events.

The filesystem is set up in the following driver/PCI-instance
hierarchy:
<debugfs>
   |-- ixgbe
	|-- PCI instance
	|	|-- attribute files

Signed-off-by: Catherine Sullivan <catherine.sullivan@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Catherine Sullivan 2012-08-10 01:59:10 +00:00 committed by Jeff Kirsher
parent d6ea075452
commit 00949167d6
4 changed files with 106 additions and 2 deletions
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2
drivers/net/ethernet/intel/ixgbe/Makefile
View file

@ -32,7 +32,7 @@
obj-$(CONFIG_IXGBE) += ixgbe.o
ixgbe-objs := ixgbe_main.o ixgbe_common.o ixgbe_ethtool.o \
ixgbe-objs := ixgbe_main.o ixgbe_common.o ixgbe_ethtool.o ixgbe_debugfs.o\
ixgbe_82599.o ixgbe_82598.o ixgbe_phy.o ixgbe_sriov.o \
ixgbe_mbx.o ixgbe_x540.o ixgbe_lib.o

10
drivers/net/ethernet/intel/ixgbe/ixgbe.h
View file

@ -597,6 +597,9 @@ struct ixgbe_adapter {
#ifdef CONFIG_IXGBE_HWMON
struct hwmon_buff ixgbe_hwmon_buff;
#endif /* CONFIG_IXGBE_HWMON */
#ifdef CONFIG_DEBUG_FS
struct dentry *ixgbe_dbg_adapter;
#endif /*CONFIG_DEBUG_FS*/
};
struct ixgbe_fdir_filter {
@ -725,7 +728,12 @@ extern int ixgbe_fcoe_get_hbainfo(struct net_device *netdev,
struct netdev_fcoe_hbainfo *info);
extern u8 ixgbe_fcoe_get_tc(struct ixgbe_adapter *adapter);
#endif /* IXGBE_FCOE */
#ifdef CONFIG_DEBUG_FS
extern void ixgbe_dbg_adapter_init(struct ixgbe_adapter *adapter);
extern void ixgbe_dbg_adapter_exit(struct ixgbe_adapter *adapter);
extern void ixgbe_dbg_init(void);
extern void ixgbe_dbg_exit(void);
#endif /* CONFIG_DEBUG_FS */
static inline struct netdev_queue *txring_txq(const struct ixgbe_ring *ring)
{
return netdev_get_tx_queue(ring->netdev, ring->queue_index);

79
drivers/net/ethernet/intel/ixgbe/ixgbe_debugfs.c Normal file
View file

@ -0,0 +1,79 @@
/*******************************************************************************
Intel 10 Gigabit PCI Express Linux driver
Copyright(c) 1999 - 2012 Intel Corporation.
This program is free software; you can redistribute it and/or modify it
under the terms and conditions of the GNU General Public License,
version 2, as published by the Free Software Foundation.
This program is distributed in the hope it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
The full GNU General Public License is included in this distribution in
the file called "COPYING".
Contact Information:
e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*******************************************************************************/
#ifdef CONFIG_DEBUG_FS
#include <linux/debugfs.h>
#include <linux/module.h>
#include "ixgbe.h"
static struct dentry *ixgbe_dbg_root;
/**
* ixgbe_dbg_adapter_init - setup the debugfs directory for the adapter
* @adapter: the adapter that is starting up
**/
void ixgbe_dbg_adapter_init(struct ixgbe_adapter *adapter)
{
const char *name = pci_name(adapter->pdev);
adapter->ixgbe_dbg_adapter = debugfs_create_dir(name, ixgbe_dbg_root);
if (!adapter->ixgbe_dbg_adapter)
e_dev_err("debugfs entry for %s failed\n", name);
}
/**
* ixgbe_dbg_adapter_exit - clear out the adapter's debugfs entries
* @pf: the pf that is stopping
**/
void ixgbe_dbg_adapter_exit(struct ixgbe_adapter *adapter)
{
if (adapter->ixgbe_dbg_adapter)
debugfs_remove_recursive(adapter->ixgbe_dbg_adapter);
adapter->ixgbe_dbg_adapter = NULL;
}
/**
* ixgbe_dbg_init - start up debugfs for the driver
**/
void ixgbe_dbg_init(void)
{
ixgbe_dbg_root = debugfs_create_dir(ixgbe_driver_name, NULL);
if (ixgbe_dbg_root == NULL)
pr_err("init of debugfs failed\n");
}
/**
* ixgbe_dbg_exit - clean out the driver's debugfs entries
**/
void ixgbe_dbg_exit(void)
{
debugfs_remove_recursive(ixgbe_dbg_root);
}
#endif /* CONFIG_DEBUG_FS */

17
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
View file

@ -7448,6 +7448,10 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev,
e_err(probe, "failed to allocate sysfs resources\n");
#endif /* CONFIG_IXGBE_HWMON */
#ifdef CONFIG_DEBUG_FS
ixgbe_dbg_adapter_init(adapter);
#endif /* CONFIG_DEBUG_FS */
return 0;
err_register:
@ -7482,6 +7486,10 @@ static void __devexit ixgbe_remove(struct pci_dev *pdev)
struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
struct net_device *netdev = adapter->netdev;
#ifdef CONFIG_DEBUG_FS
ixgbe_dbg_adapter_exit(adapter);
#endif /*CONFIG_DEBUG_FS */
set_bit(__IXGBE_DOWN, &adapter->state);
cancel_work_sync(&adapter->service_task);
@ -7737,6 +7745,10 @@ static int __init ixgbe_init_module(void)
pr_info("%s - version %s\n", ixgbe_driver_string, ixgbe_driver_version);
pr_info("%s\n", ixgbe_copyright);
#ifdef CONFIG_DEBUG_FS
ixgbe_dbg_init();
#endif /* CONFIG_DEBUG_FS */
#ifdef CONFIG_IXGBE_DCA
dca_register_notify(&dca_notifier);
#endif
@ -7759,6 +7771,11 @@ static void __exit ixgbe_exit_module(void)
dca_unregister_notify(&dca_notifier);
#endif
pci_unregister_driver(&ixgbe_driver);
#ifdef CONFIG_DEBUG_FS
ixgbe_dbg_exit();
#endif /* CONFIG_DEBUG_FS */
rcu_barrier(); /* Wait for completion of call_rcu()'s */
}