1 /*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2013 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 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26
27 *******************************************************************************/
28 #include <linux/debugfs.h>
29 #include <linux/module.h>
30
31 #include "ixgbe.h"
32
33 static struct dentry *ixgbe_dbg_root;
34
35 static char ixgbe_dbg_reg_ops_buf[256] = "";
36
37 /**
38 * ixgbe_dbg_reg_ops_read - read for reg_ops datum
39 * @filp: the opened file
40 * @buffer: where to write the data for the user to read
41 * @count: the size of the user's buffer
42 * @ppos: file position offset
43 **/
ixgbe_dbg_reg_ops_read(struct file * filp,char __user * buffer,size_t count,loff_t * ppos)44 static ssize_t ixgbe_dbg_reg_ops_read(struct file *filp, char __user *buffer,
45 size_t count, loff_t *ppos)
46 {
47 struct ixgbe_adapter *adapter = filp->private_data;
48 char *buf;
49 int len;
50
51 /* don't allow partial reads */
52 if (*ppos != 0)
53 return 0;
54
55 buf = kasprintf(GFP_KERNEL, "%s: %s\n",
56 adapter->netdev->name,
57 ixgbe_dbg_reg_ops_buf);
58 if (!buf)
59 return -ENOMEM;
60
61 if (count < strlen(buf)) {
62 kfree(buf);
63 return -ENOSPC;
64 }
65
66 len = simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));
67
68 kfree(buf);
69 return len;
70 }
71
72 /**
73 * ixgbe_dbg_reg_ops_write - write into reg_ops datum
74 * @filp: the opened file
75 * @buffer: where to find the user's data
76 * @count: the length of the user's data
77 * @ppos: file position offset
78 **/
ixgbe_dbg_reg_ops_write(struct file * filp,const char __user * buffer,size_t count,loff_t * ppos)79 static ssize_t ixgbe_dbg_reg_ops_write(struct file *filp,
80 const char __user *buffer,
81 size_t count, loff_t *ppos)
82 {
83 struct ixgbe_adapter *adapter = filp->private_data;
84 int len;
85
86 /* don't allow partial writes */
87 if (*ppos != 0)
88 return 0;
89 if (count >= sizeof(ixgbe_dbg_reg_ops_buf))
90 return -ENOSPC;
91
92 len = simple_write_to_buffer(ixgbe_dbg_reg_ops_buf,
93 sizeof(ixgbe_dbg_reg_ops_buf)-1,
94 ppos,
95 buffer,
96 count);
97 if (len < 0)
98 return len;
99
100 ixgbe_dbg_reg_ops_buf[len] = '\0';
101
102 if (strncmp(ixgbe_dbg_reg_ops_buf, "write", 5) == 0) {
103 u32 reg, value;
104 int cnt;
105 cnt = sscanf(&ixgbe_dbg_reg_ops_buf[5], "%x %x", ®, &value);
106 if (cnt == 2) {
107 IXGBE_WRITE_REG(&adapter->hw, reg, value);
108 value = IXGBE_READ_REG(&adapter->hw, reg);
109 e_dev_info("write: 0x%08x = 0x%08x\n", reg, value);
110 } else {
111 e_dev_info("write <reg> <value>\n");
112 }
113 } else if (strncmp(ixgbe_dbg_reg_ops_buf, "read", 4) == 0) {
114 u32 reg, value;
115 int cnt;
116 cnt = sscanf(&ixgbe_dbg_reg_ops_buf[4], "%x", ®);
117 if (cnt == 1) {
118 value = IXGBE_READ_REG(&adapter->hw, reg);
119 e_dev_info("read 0x%08x = 0x%08x\n", reg, value);
120 } else {
121 e_dev_info("read <reg>\n");
122 }
123 } else {
124 e_dev_info("Unknown command %s\n", ixgbe_dbg_reg_ops_buf);
125 e_dev_info("Available commands:\n");
126 e_dev_info(" read <reg>\n");
127 e_dev_info(" write <reg> <value>\n");
128 }
129 return count;
130 }
131
132 static const struct file_operations ixgbe_dbg_reg_ops_fops = {
133 .owner = THIS_MODULE,
134 .open = simple_open,
135 .read = ixgbe_dbg_reg_ops_read,
136 .write = ixgbe_dbg_reg_ops_write,
137 };
138
139 static char ixgbe_dbg_netdev_ops_buf[256] = "";
140
141 /**
142 * ixgbe_dbg_netdev_ops_read - read for netdev_ops datum
143 * @filp: the opened file
144 * @buffer: where to write the data for the user to read
145 * @count: the size of the user's buffer
146 * @ppos: file position offset
147 **/
ixgbe_dbg_netdev_ops_read(struct file * filp,char __user * buffer,size_t count,loff_t * ppos)148 static ssize_t ixgbe_dbg_netdev_ops_read(struct file *filp,
149 char __user *buffer,
150 size_t count, loff_t *ppos)
151 {
152 struct ixgbe_adapter *adapter = filp->private_data;
153 char *buf;
154 int len;
155
156 /* don't allow partial reads */
157 if (*ppos != 0)
158 return 0;
159
160 buf = kasprintf(GFP_KERNEL, "%s: %s\n",
161 adapter->netdev->name,
162 ixgbe_dbg_netdev_ops_buf);
163 if (!buf)
164 return -ENOMEM;
165
166 if (count < strlen(buf)) {
167 kfree(buf);
168 return -ENOSPC;
169 }
170
171 len = simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));
172
173 kfree(buf);
174 return len;
175 }
176
177 /**
178 * ixgbe_dbg_netdev_ops_write - write into netdev_ops datum
179 * @filp: the opened file
180 * @buffer: where to find the user's data
181 * @count: the length of the user's data
182 * @ppos: file position offset
183 **/
ixgbe_dbg_netdev_ops_write(struct file * filp,const char __user * buffer,size_t count,loff_t * ppos)184 static ssize_t ixgbe_dbg_netdev_ops_write(struct file *filp,
185 const char __user *buffer,
186 size_t count, loff_t *ppos)
187 {
188 struct ixgbe_adapter *adapter = filp->private_data;
189 int len;
190
191 /* don't allow partial writes */
192 if (*ppos != 0)
193 return 0;
194 if (count >= sizeof(ixgbe_dbg_netdev_ops_buf))
195 return -ENOSPC;
196
197 len = simple_write_to_buffer(ixgbe_dbg_netdev_ops_buf,
198 sizeof(ixgbe_dbg_netdev_ops_buf)-1,
199 ppos,
200 buffer,
201 count);
202 if (len < 0)
203 return len;
204
205 ixgbe_dbg_netdev_ops_buf[len] = '\0';
206
207 if (strncmp(ixgbe_dbg_netdev_ops_buf, "tx_timeout", 10) == 0) {
208 adapter->netdev->netdev_ops->ndo_tx_timeout(adapter->netdev);
209 e_dev_info("tx_timeout called\n");
210 } else {
211 e_dev_info("Unknown command: %s\n", ixgbe_dbg_netdev_ops_buf);
212 e_dev_info("Available commands:\n");
213 e_dev_info(" tx_timeout\n");
214 }
215 return count;
216 }
217
218 static const struct file_operations ixgbe_dbg_netdev_ops_fops = {
219 .owner = THIS_MODULE,
220 .open = simple_open,
221 .read = ixgbe_dbg_netdev_ops_read,
222 .write = ixgbe_dbg_netdev_ops_write,
223 };
224
225 /**
226 * ixgbe_dbg_adapter_init - setup the debugfs directory for the adapter
227 * @adapter: the adapter that is starting up
228 **/
ixgbe_dbg_adapter_init(struct ixgbe_adapter * adapter)229 void ixgbe_dbg_adapter_init(struct ixgbe_adapter *adapter)
230 {
231 const char *name = pci_name(adapter->pdev);
232 struct dentry *pfile;
233 adapter->ixgbe_dbg_adapter = debugfs_create_dir(name, ixgbe_dbg_root);
234 if (adapter->ixgbe_dbg_adapter) {
235 pfile = debugfs_create_file("reg_ops", 0600,
236 adapter->ixgbe_dbg_adapter, adapter,
237 &ixgbe_dbg_reg_ops_fops);
238 if (!pfile)
239 e_dev_err("debugfs reg_ops for %s failed\n", name);
240 pfile = debugfs_create_file("netdev_ops", 0600,
241 adapter->ixgbe_dbg_adapter, adapter,
242 &ixgbe_dbg_netdev_ops_fops);
243 if (!pfile)
244 e_dev_err("debugfs netdev_ops for %s failed\n", name);
245 } else {
246 e_dev_err("debugfs entry for %s failed\n", name);
247 }
248 }
249
250 /**
251 * ixgbe_dbg_adapter_exit - clear out the adapter's debugfs entries
252 * @pf: the pf that is stopping
253 **/
ixgbe_dbg_adapter_exit(struct ixgbe_adapter * adapter)254 void ixgbe_dbg_adapter_exit(struct ixgbe_adapter *adapter)
255 {
256 debugfs_remove_recursive(adapter->ixgbe_dbg_adapter);
257 adapter->ixgbe_dbg_adapter = NULL;
258 }
259
260 /**
261 * ixgbe_dbg_init - start up debugfs for the driver
262 **/
ixgbe_dbg_init(void)263 void ixgbe_dbg_init(void)
264 {
265 ixgbe_dbg_root = debugfs_create_dir(ixgbe_driver_name, NULL);
266 if (ixgbe_dbg_root == NULL)
267 pr_err("init of debugfs failed\n");
268 }
269
270 /**
271 * ixgbe_dbg_exit - clean out the driver's debugfs entries
272 **/
ixgbe_dbg_exit(void)273 void ixgbe_dbg_exit(void)
274 {
275 debugfs_remove_recursive(ixgbe_dbg_root);
276 }
277