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28#include <linux/debugfs.h>
29#include <linux/module.h>
30
31#include "ixgbe.h"
32
33static struct dentry *ixgbe_dbg_root;
34
35static char ixgbe_dbg_reg_ops_buf[256] = "";
36
37
38
39
40
41
42
43
44static 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
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
74
75
76
77
78
79static 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
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
132static 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
139static char ixgbe_dbg_netdev_ops_buf[256] = "";
140
141
142
143
144
145
146
147
148static 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
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
179
180
181
182
183
184static 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
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
218static 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
227
228
229void 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
252
253
254void 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
262
263void 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
272
273void ixgbe_dbg_exit(void)
274{
275 debugfs_remove_recursive(ixgbe_dbg_root);
276}
277