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[can-eth-gw-linux.git] / drivers / net / ethernet / intel / ixgbe / ixgbe_debugfs.c
1 /*******************************************************************************
2
3   Intel 10 Gigabit PCI Express Linux driver
4   Copyright(c) 1999 - 2012 Intel Corporation.
5
6   This program is free software; you can redistribute it and/or modify it
7   under the terms and conditions of the GNU General Public License,
8   version 2, as published by the Free Software Foundation.
9
10   This program is distributed in the hope it will be useful, but WITHOUT
11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
13   more details.
14
15   You should have received a copy of the GNU General Public License along with
16   this program; if not, write to the Free Software Foundation, Inc.,
17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19   The full GNU General Public License is included in this distribution in
20   the file called "COPYING".
21
22   Contact Information:
23   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25
26 *******************************************************************************/
27
28 #ifdef CONFIG_DEBUG_FS
29
30 #include <linux/debugfs.h>
31 #include <linux/module.h>
32
33 #include "ixgbe.h"
34
35 static struct dentry *ixgbe_dbg_root;
36
37 static char ixgbe_dbg_reg_ops_buf[256] = "";
38
39 /**
40  * ixgbe_dbg_reg_ops_open - prep the debugfs pokee data item when opened
41  * @inode: inode that was opened
42  * @filp:  file info
43  *
44  * Stash the adapter pointer hiding in the inode into the file pointer where
45  * we can find it later in the read and write calls
46  **/
47 static int ixgbe_dbg_reg_ops_open(struct inode *inode, struct file *filp)
48 {
49         filp->private_data = inode->i_private;
50         return 0;
51 }
52
53 /**
54  * ixgbe_dbg_reg_ops_read - read for reg_ops datum
55  * @filp: the opened file
56  * @buffer: where to write the data for the user to read
57  * @count: the size of the user's buffer
58  * @ppos: file position offset
59  **/
60 static ssize_t ixgbe_dbg_reg_ops_read(struct file *filp, char __user *buffer,
61                                     size_t count, loff_t *ppos)
62 {
63         struct ixgbe_adapter *adapter = filp->private_data;
64         char buf[256];
65         int bytes_not_copied;
66         int len;
67
68         /* don't allow partial reads */
69         if (*ppos != 0)
70                 return 0;
71
72         len = snprintf(buf, sizeof(buf), "%s: %s\n",
73                        adapter->netdev->name, ixgbe_dbg_reg_ops_buf);
74         if (count < len)
75                 return -ENOSPC;
76         bytes_not_copied = copy_to_user(buffer, buf, len);
77         if (bytes_not_copied < 0)
78                 return bytes_not_copied;
79
80         *ppos = len;
81         return len;
82 }
83
84 /**
85  * ixgbe_dbg_reg_ops_write - write into reg_ops datum
86  * @filp: the opened file
87  * @buffer: where to find the user's data
88  * @count: the length of the user's data
89  * @ppos: file position offset
90  **/
91 static ssize_t ixgbe_dbg_reg_ops_write(struct file *filp,
92                                      const char __user *buffer,
93                                      size_t count, loff_t *ppos)
94 {
95         struct ixgbe_adapter *adapter = filp->private_data;
96         int bytes_not_copied;
97
98         /* don't allow partial writes */
99         if (*ppos != 0)
100                 return 0;
101         if (count >= sizeof(ixgbe_dbg_reg_ops_buf))
102                 return -ENOSPC;
103
104         bytes_not_copied = copy_from_user(ixgbe_dbg_reg_ops_buf, buffer, count);
105         if (bytes_not_copied < 0)
106                 return bytes_not_copied;
107         else if (bytes_not_copied < count)
108                 count -= bytes_not_copied;
109         else
110                 return -ENOSPC;
111         ixgbe_dbg_reg_ops_buf[count] = '\0';
112
113         if (strncmp(ixgbe_dbg_reg_ops_buf, "write", 5) == 0) {
114                 u32 reg, value;
115                 int cnt;
116                 cnt = sscanf(&ixgbe_dbg_reg_ops_buf[5], "%x %x", &reg, &value);
117                 if (cnt == 2) {
118                         IXGBE_WRITE_REG(&adapter->hw, reg, value);
119                         value = IXGBE_READ_REG(&adapter->hw, reg);
120                         e_dev_info("write: 0x%08x = 0x%08x\n", reg, value);
121                 } else {
122                         e_dev_info("write <reg> <value>\n");
123                 }
124         } else if (strncmp(ixgbe_dbg_reg_ops_buf, "read", 4) == 0) {
125                 u32 reg, value;
126                 int cnt;
127                 cnt = sscanf(&ixgbe_dbg_reg_ops_buf[4], "%x", &reg);
128                 if (cnt == 1) {
129                         value = IXGBE_READ_REG(&adapter->hw, reg);
130                         e_dev_info("read 0x%08x = 0x%08x\n", reg, value);
131                 } else {
132                         e_dev_info("read <reg>\n");
133                 }
134         } else {
135                 e_dev_info("Unknown command %s\n", ixgbe_dbg_reg_ops_buf);
136                 e_dev_info("Available commands:\n");
137                 e_dev_info("   read <reg>\n");
138                 e_dev_info("   write <reg> <value>\n");
139         }
140         return count;
141 }
142
143 static const struct file_operations ixgbe_dbg_reg_ops_fops = {
144         .owner = THIS_MODULE,
145         .open =  ixgbe_dbg_reg_ops_open,
146         .read =  ixgbe_dbg_reg_ops_read,
147         .write = ixgbe_dbg_reg_ops_write,
148 };
149
150 static char ixgbe_dbg_netdev_ops_buf[256] = "";
151
152 /**
153  * ixgbe_dbg_netdev_ops_open - prep the debugfs netdev_ops data item
154  * @inode: inode that was opened
155  * @filp: file info
156  *
157  * Stash the adapter pointer hiding in the inode into the file pointer
158  * where we can find it later in the read and write calls
159  **/
160 static int ixgbe_dbg_netdev_ops_open(struct inode *inode, struct file *filp)
161 {
162         filp->private_data = inode->i_private;
163         return 0;
164 }
165
166 /**
167  * ixgbe_dbg_netdev_ops_read - read for netdev_ops datum
168  * @filp: the opened file
169  * @buffer: where to write the data for the user to read
170  * @count: the size of the user's buffer
171  * @ppos: file position offset
172  **/
173 static ssize_t ixgbe_dbg_netdev_ops_read(struct file *filp,
174                                          char __user *buffer,
175                                          size_t count, loff_t *ppos)
176 {
177         struct ixgbe_adapter *adapter = filp->private_data;
178         char buf[256];
179         int bytes_not_copied;
180         int len;
181
182         /* don't allow partial reads */
183         if (*ppos != 0)
184                 return 0;
185
186         len = snprintf(buf, sizeof(buf), "%s: %s\n",
187                        adapter->netdev->name, ixgbe_dbg_netdev_ops_buf);
188         if (count < len)
189                 return -ENOSPC;
190         bytes_not_copied = copy_to_user(buffer, buf, len);
191         if (bytes_not_copied < 0)
192                 return bytes_not_copied;
193
194         *ppos = len;
195         return len;
196 }
197
198 /**
199  * ixgbe_dbg_netdev_ops_write - write into netdev_ops datum
200  * @filp: the opened file
201  * @buffer: where to find the user's data
202  * @count: the length of the user's data
203  * @ppos: file position offset
204  **/
205 static ssize_t ixgbe_dbg_netdev_ops_write(struct file *filp,
206                                           const char __user *buffer,
207                                           size_t count, loff_t *ppos)
208 {
209         struct ixgbe_adapter *adapter = filp->private_data;
210         int bytes_not_copied;
211
212         /* don't allow partial writes */
213         if (*ppos != 0)
214                 return 0;
215         if (count >= sizeof(ixgbe_dbg_netdev_ops_buf))
216                 return -ENOSPC;
217
218         bytes_not_copied = copy_from_user(ixgbe_dbg_netdev_ops_buf,
219                                           buffer, count);
220         if (bytes_not_copied < 0)
221                 return bytes_not_copied;
222         else if (bytes_not_copied < count)
223                 count -= bytes_not_copied;
224         else
225                 return -ENOSPC;
226         ixgbe_dbg_netdev_ops_buf[count] = '\0';
227
228         if (strncmp(ixgbe_dbg_netdev_ops_buf, "tx_timeout", 10) == 0) {
229                 adapter->netdev->netdev_ops->ndo_tx_timeout(adapter->netdev);
230                 e_dev_info("tx_timeout called\n");
231         } else {
232                 e_dev_info("Unknown command: %s\n", ixgbe_dbg_netdev_ops_buf);
233                 e_dev_info("Available commands:\n");
234                 e_dev_info("    tx_timeout\n");
235         }
236         return count;
237 }
238
239 static const struct file_operations ixgbe_dbg_netdev_ops_fops = {
240         .owner = THIS_MODULE,
241         .open = ixgbe_dbg_netdev_ops_open,
242         .read = ixgbe_dbg_netdev_ops_read,
243         .write = ixgbe_dbg_netdev_ops_write,
244 };
245
246 /**
247  * ixgbe_dbg_adapter_init - setup the debugfs directory for the adapter
248  * @adapter: the adapter that is starting up
249  **/
250 void ixgbe_dbg_adapter_init(struct ixgbe_adapter *adapter)
251 {
252         const char *name = pci_name(adapter->pdev);
253         struct dentry *pfile;
254         adapter->ixgbe_dbg_adapter = debugfs_create_dir(name, ixgbe_dbg_root);
255         if (adapter->ixgbe_dbg_adapter) {
256                 pfile = debugfs_create_file("reg_ops", 0600,
257                                             adapter->ixgbe_dbg_adapter, adapter,
258                                             &ixgbe_dbg_reg_ops_fops);
259                 if (!pfile)
260                         e_dev_err("debugfs reg_ops for %s failed\n", name);
261                 pfile = debugfs_create_file("netdev_ops", 0600,
262                                             adapter->ixgbe_dbg_adapter, adapter,
263                                             &ixgbe_dbg_netdev_ops_fops);
264                 if (!pfile)
265                         e_dev_err("debugfs netdev_ops for %s failed\n", name);
266         } else {
267                 e_dev_err("debugfs entry for %s failed\n", name);
268         }
269 }
270
271 /**
272  * ixgbe_dbg_adapter_exit - clear out the adapter's debugfs entries
273  * @pf: the pf that is stopping
274  **/
275 void ixgbe_dbg_adapter_exit(struct ixgbe_adapter *adapter)
276 {
277         if (adapter->ixgbe_dbg_adapter)
278                 debugfs_remove_recursive(adapter->ixgbe_dbg_adapter);
279         adapter->ixgbe_dbg_adapter = NULL;
280 }
281
282 /**
283  * ixgbe_dbg_init - start up debugfs for the driver
284  **/
285 void ixgbe_dbg_init(void)
286 {
287         ixgbe_dbg_root = debugfs_create_dir(ixgbe_driver_name, NULL);
288         if (ixgbe_dbg_root == NULL)
289                 pr_err("init of debugfs failed\n");
290 }
291
292 /**
293  * ixgbe_dbg_exit - clean out the driver's debugfs entries
294  **/
295 void ixgbe_dbg_exit(void)
296 {
297         debugfs_remove_recursive(ixgbe_dbg_root);
298 }
299
300 #endif /* CONFIG_DEBUG_FS */