summaryrefslogtreecommitdiffstats
path: root/kernel/drivers/net/ethernet/intel/ixgbe/ixgbe_debugfs.c
blob: 5e2c1e35e517f915d2e6f43a5e7c1368d2f81bfe (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
/*******************************************************************************

  Intel 10 Gigabit PCI Express Linux driver
  Copyright(c) 1999 - 2013 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:
  Linux NICS <linux.nics@intel.com>
  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

*******************************************************************************/
#include <linux/debugfs.h>
#include <linux/module.h>

#include "ixgbe.h"

static struct dentry *ixgbe_dbg_root;

static char ixgbe_dbg_reg_ops_buf[256] = "";

/**
 * ixgbe_dbg_reg_ops_read - read for reg_ops datum
 * @filp: the opened file
 * @buffer: where to write the data for the user to read
 * @count: the size of the user's buffer
 * @ppos: file position offset
 **/
static ssize_t ixgbe_dbg_reg_ops_read(struct file *filp, char __user *buffer,
				    size_t count, loff_t *ppos)
{
	struct ixgbe_adapter *adapter = filp->private_data;
	char *buf;
	int len;

	/* don't allow partial reads */
	if (*ppos != 0)
		return 0;

	buf = kasprintf(GFP_KERNEL, "%s: %s\n",
			adapter->netdev->name,
			ixgbe_dbg_reg_ops_buf);
	if (!buf)
		return -ENOMEM;

	if (count < strlen(buf)) {
		kfree(buf);
		return -ENOSPC;
	}

	len = simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));

	kfree(buf);
	return len;
}

/**
 * ixgbe_dbg_reg_ops_write - write into reg_ops datum
 * @filp: the opened file
 * @buffer: where to find the user's data
 * @count: the length of the user's data
 * @ppos: file position offset
 **/
static ssize_t ixgbe_dbg_reg_ops_write(struct file *filp,
				     const char __user *buffer,
				     size_t count, loff_t *ppos)
{
	struct ixgbe_adapter *adapter = filp->private_data;
	int len;

	/* don't allow partial writes */
	if (*ppos != 0)
		return 0;
	if (count >= sizeof(ixgbe_dbg_reg_ops_buf))
		return -ENOSPC;

	len = simple_write_to_buffer(ixgbe_dbg_reg_ops_buf,
				     sizeof(ixgbe_dbg_reg_ops_buf)-1,
				     ppos,
				     buffer,
				     count);
	if (len < 0)
		return len;

	ixgbe_dbg_reg_ops_buf[len] = '\0';

	if (strncmp(ixgbe_dbg_reg_ops_buf, "write", 5) == 0) {
		u32 reg, value;
		int cnt;
		cnt = sscanf(&ixgbe_dbg_reg_ops_buf[5], "%x %x", &reg, &value);
		if (cnt == 2) {
			IXGBE_WRITE_REG(&adapter->hw, reg, value);
			value = IXGBE_READ_REG(&adapter->hw, reg);
			e_dev_info("write: 0x%08x = 0x%08x\n", reg, value);
		} else {
			e_dev_info("write <reg> <value>\n");
		}
	} else if (strncmp(ixgbe_dbg_reg_ops_buf, "read", 4) == 0) {
		u32 reg, value;
		int cnt;
		cnt = sscanf(&ixgbe_dbg_reg_ops_buf[4], "%x", &reg);
		if (cnt == 1) {
			value = IXGBE_READ_REG(&adapter->hw, reg);
			e_dev_info("read 0x%08x = 0x%08x\n", reg, value);
		} else {
			e_dev_info("read <reg>\n");
		}
	} else {
		e_dev_info("Unknown command %s\n", ixgbe_dbg_reg_ops_buf);
		e_dev_info("Available commands:\n");
		e_dev_info("   read <reg>\n");
		e_dev_info("   write <reg> <value>\n");
	}
	return count;
}

static const struct file_operations ixgbe_dbg_reg_ops_fops = {
	.owner = THIS_MODULE,
	.open = simple_open,
	.read =  ixgbe_dbg_reg_ops_read,
	.write = ixgbe_dbg_reg_ops_write,
};

static char ixgbe_dbg_netdev_ops_buf[256] = "";

/**
 * ixgbe_dbg_netdev_ops_read - read for netdev_ops datum
 * @filp: the opened file
 * @buffer: where to write the data for the user to read
 * @count: the size of the user's buffer
 * @ppos: file position offset
 **/
static ssize_t ixgbe_dbg_netdev_ops_read(struct file *filp,
					 char __user *buffer,
					 size_t count, loff_t *ppos)
{
	struct ixgbe_adapter *adapter = filp->private_data;
	char *buf;
	int len;

	/* don't allow partial reads */
	if (*ppos != 0)
		return 0;

	buf = kasprintf(GFP_KERNEL, "%s: %s\n",
			adapter->netdev->name,
			ixgbe_dbg_netdev_ops_buf);
	if (!buf)
		return -ENOMEM;

	if (count < strlen(buf)) {
		kfree(buf);
		return -ENOSPC;
	}

	len = simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));

	kfree(buf);
	return len;
}

/**
 * ixgbe_dbg_netdev_ops_write - write into netdev_ops datum
 * @filp: the opened file
 * @buffer: where to find the user's data
 * @count: the length of the user's data
 * @ppos: file position offset
 **/
static ssize_t ixgbe_dbg_netdev_ops_write(struct file *filp,
					  const char __user *buffer,
					  size_t count, loff_t *ppos)
{
	struct ixgbe_adapter *adapter = filp->private_data;
	int len;

	/* don't allow partial writes */
	if (*ppos != 0)
		return 0;
	if (count >= sizeof(ixgbe_dbg_netdev_ops_buf))
		return -ENOSPC;

	len = simple_write_to_buffer(ixgbe_dbg_netdev_ops_buf,
				     sizeof(ixgbe_dbg_netdev_ops_buf)-1,
				     ppos,
				     buffer,
				     count);
	if (len < 0)
		return len;

	ixgbe_dbg_netdev_ops_buf[len] = '\0';

	if (strncmp(ixgbe_dbg_netdev_ops_buf, "tx_timeout", 10) == 0) {
		adapter->netdev->netdev_ops->ndo_tx_timeout(adapter->netdev);
		e_dev_info("tx_timeout called\n");
	} else {
		e_dev_info("Unknown command: %s\n", ixgbe_dbg_netdev_ops_buf);
		e_dev_info("Available commands:\n");
		e_dev_info("    tx_timeout\n");
	}
	return count;
}

static const struct file_operations ixgbe_dbg_netdev_ops_fops = {
	.owner = THIS_MODULE,
	.open = simple_open,
	.read = ixgbe_dbg_netdev_ops_read,
	.write = ixgbe_dbg_netdev_ops_write,
};

/**
 * 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);
	struct dentry *pfile;
	adapter->ixgbe_dbg_adapter = debugfs_create_dir(name, ixgbe_dbg_root);
	if (adapter->ixgbe_dbg_adapter) {
		pfile = debugfs_create_file("reg_ops", 0600,
					    adapter->ixgbe_dbg_adapter, adapter,
					    &ixgbe_dbg_reg_ops_fops);
		if (!pfile)
			e_dev_err("debugfs reg_ops for %s failed\n", name);
		pfile = debugfs_create_file("netdev_ops", 0600,
					    adapter->ixgbe_dbg_adapter, adapter,
					    &ixgbe_dbg_netdev_ops_fops);
		if (!pfile)
			e_dev_err("debugfs netdev_ops for %s failed\n", name);
	} else {
		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)
{
	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);
}