summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/amd/xgbe/xgbe-debugfs.c
blob: 346592dca33ce98dd94e24f33f99eabb373f60cb (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
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
/*
 * AMD 10Gb Ethernet driver
 *
 * This file is available to you under your choice of the following two
 * licenses:
 *
 * License 1: GPLv2
 *
 * Copyright (c) 2014 Advanced Micro Devices, Inc.
 *
 * This file is free software; you may copy, redistribute and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or (at
 * your option) any later version.
 *
 * This file is distributed in the hope that 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, see <http://www.gnu.org/licenses/>.
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *     The Synopsys DWC ETHER XGMAC Software Driver and documentation
 *     (hereinafter "Software") is an unsupported proprietary work of Synopsys,
 *     Inc. unless otherwise expressly agreed to in writing between Synopsys
 *     and you.
 *
 *     The Software IS NOT an item of Licensed Software or Licensed Product
 *     under any End User Software License Agreement or Agreement for Licensed
 *     Product with Synopsys or any supplement thereto.  Permission is hereby
 *     granted, free of charge, to any person obtaining a copy of this software
 *     annotated with this license and the Software, to deal in the Software
 *     without restriction, including without limitation the rights to use,
 *     copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 *     of the Software, and to permit persons to whom the Software is furnished
 *     to do so, subject to the following conditions:
 *
 *     The above copyright notice and this permission notice shall be included
 *     in all copies or substantial portions of the Software.
 *
 *     THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
 *     BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 *     TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 *     PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
 *     BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *     CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *     SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 *     INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 *     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 *     THE POSSIBILITY OF SUCH DAMAGE.
 *
 *
 * License 2: Modified BSD
 *
 * Copyright (c) 2014 Advanced Micro Devices, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Advanced Micro Devices, Inc. nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *     The Synopsys DWC ETHER XGMAC Software Driver and documentation
 *     (hereinafter "Software") is an unsupported proprietary work of Synopsys,
 *     Inc. unless otherwise expressly agreed to in writing between Synopsys
 *     and you.
 *
 *     The Software IS NOT an item of Licensed Software or Licensed Product
 *     under any End User Software License Agreement or Agreement for Licensed
 *     Product with Synopsys or any supplement thereto.  Permission is hereby
 *     granted, free of charge, to any person obtaining a copy of this software
 *     annotated with this license and the Software, to deal in the Software
 *     without restriction, including without limitation the rights to use,
 *     copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 *     of the Software, and to permit persons to whom the Software is furnished
 *     to do so, subject to the following conditions:
 *
 *     The above copyright notice and this permission notice shall be included
 *     in all copies or substantial portions of the Software.
 *
 *     THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
 *     BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 *     TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 *     PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
 *     BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *     CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *     SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 *     INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 *     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 *     THE POSSIBILITY OF SUCH DAMAGE.
 */

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

#include "xgbe.h"
#include "xgbe-common.h"


static ssize_t xgbe_common_read(char __user *buffer, size_t count,
				loff_t *ppos, unsigned int value)
{
	char *buf;
	ssize_t len;

	if (*ppos != 0)
		return 0;

	buf = kasprintf(GFP_KERNEL, "0x%08x\n", value);
	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;
}

static ssize_t xgbe_common_write(const char __user *buffer, size_t count,
				 loff_t *ppos, unsigned int *value)
{
	char workarea[32];
	ssize_t len;
	int ret;

	if (*ppos != 0)
		return 0;

	if (count >= sizeof(workarea))
		return -ENOSPC;

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

	workarea[len] = '\0';
	ret = kstrtouint(workarea, 16, value);
	if (ret)
		return -EIO;

	return len;
}

static ssize_t xgmac_reg_addr_read(struct file *filp, char __user *buffer,
				   size_t count, loff_t *ppos)
{
	struct xgbe_prv_data *pdata = filp->private_data;

	return xgbe_common_read(buffer, count, ppos, pdata->debugfs_xgmac_reg);
}

static ssize_t xgmac_reg_addr_write(struct file *filp,
				    const char __user *buffer,
				    size_t count, loff_t *ppos)
{
	struct xgbe_prv_data *pdata = filp->private_data;

	return xgbe_common_write(buffer, count, ppos,
				 &pdata->debugfs_xgmac_reg);
}

static ssize_t xgmac_reg_value_read(struct file *filp, char __user *buffer,
				    size_t count, loff_t *ppos)
{
	struct xgbe_prv_data *pdata = filp->private_data;
	unsigned int value;

	value = XGMAC_IOREAD(pdata, pdata->debugfs_xgmac_reg);

	return xgbe_common_read(buffer, count, ppos, value);
}

static ssize_t xgmac_reg_value_write(struct file *filp,
				     const char __user *buffer,
				     size_t count, loff_t *ppos)
{
	struct xgbe_prv_data *pdata = filp->private_data;
	unsigned int value;
	ssize_t len;

	len = xgbe_common_write(buffer, count, ppos, &value);
	if (len < 0)
		return len;

	XGMAC_IOWRITE(pdata, pdata->debugfs_xgmac_reg, value);

	return len;
}

static const struct file_operations xgmac_reg_addr_fops = {
	.owner = THIS_MODULE,
	.open = simple_open,
	.read =  xgmac_reg_addr_read,
	.write = xgmac_reg_addr_write,
};

static const struct file_operations xgmac_reg_value_fops = {
	.owner = THIS_MODULE,
	.open = simple_open,
	.read =  xgmac_reg_value_read,
	.write = xgmac_reg_value_write,
};

static ssize_t xpcs_mmd_read(struct file *filp, char __user *buffer,
			     size_t count, loff_t *ppos)
{
	struct xgbe_prv_data *pdata = filp->private_data;

	return xgbe_common_read(buffer, count, ppos, pdata->debugfs_xpcs_mmd);
}

static ssize_t xpcs_mmd_write(struct file *filp, const char __user *buffer,
			      size_t count, loff_t *ppos)
{
	struct xgbe_prv_data *pdata = filp->private_data;

	return xgbe_common_write(buffer, count, ppos,
				 &pdata->debugfs_xpcs_mmd);
}

static ssize_t xpcs_reg_addr_read(struct file *filp, char __user *buffer,
				  size_t count, loff_t *ppos)
{
	struct xgbe_prv_data *pdata = filp->private_data;

	return xgbe_common_read(buffer, count, ppos, pdata->debugfs_xpcs_reg);
}

static ssize_t xpcs_reg_addr_write(struct file *filp, const char __user *buffer,
				   size_t count, loff_t *ppos)
{
	struct xgbe_prv_data *pdata = filp->private_data;

	return xgbe_common_write(buffer, count, ppos,
				 &pdata->debugfs_xpcs_reg);
}

static ssize_t xpcs_reg_value_read(struct file *filp, char __user *buffer,
				   size_t count, loff_t *ppos)
{
	struct xgbe_prv_data *pdata = filp->private_data;
	unsigned int value;

	value = pdata->hw_if.read_mmd_regs(pdata, pdata->debugfs_xpcs_mmd,
					   pdata->debugfs_xpcs_reg);

	return xgbe_common_read(buffer, count, ppos, value);
}

static ssize_t xpcs_reg_value_write(struct file *filp,
				    const char __user *buffer,
				    size_t count, loff_t *ppos)
{
	struct xgbe_prv_data *pdata = filp->private_data;
	unsigned int value;
	ssize_t len;

	len = xgbe_common_write(buffer, count, ppos, &value);
	if (len < 0)
		return len;

	pdata->hw_if.write_mmd_regs(pdata, pdata->debugfs_xpcs_mmd,
				    pdata->debugfs_xpcs_reg, value);

	return len;
}

static const struct file_operations xpcs_mmd_fops = {
	.owner = THIS_MODULE,
	.open = simple_open,
	.read =  xpcs_mmd_read,
	.write = xpcs_mmd_write,
};

static const struct file_operations xpcs_reg_addr_fops = {
	.owner = THIS_MODULE,
	.open = simple_open,
	.read =  xpcs_reg_addr_read,
	.write = xpcs_reg_addr_write,
};

static const struct file_operations xpcs_reg_value_fops = {
	.owner = THIS_MODULE,
	.open = simple_open,
	.read =  xpcs_reg_value_read,
	.write = xpcs_reg_value_write,
};

void xgbe_debugfs_init(struct xgbe_prv_data *pdata)
{
	struct dentry *pfile;
	char *buf;

	/* Set defaults */
	pdata->debugfs_xgmac_reg = 0;
	pdata->debugfs_xpcs_mmd = 1;
	pdata->debugfs_xpcs_reg = 0;

	buf = kasprintf(GFP_KERNEL, "amd-xgbe-%s", pdata->netdev->name);
	pdata->xgbe_debugfs = debugfs_create_dir(buf, NULL);
	if (pdata->xgbe_debugfs == NULL) {
		netdev_err(pdata->netdev, "debugfs_create_dir failed\n");
		return;
	}

	pfile = debugfs_create_file("xgmac_register", 0600,
				    pdata->xgbe_debugfs, pdata,
				    &xgmac_reg_addr_fops);
	if (!pfile)
		netdev_err(pdata->netdev, "debugfs_create_file failed\n");

	pfile = debugfs_create_file("xgmac_register_value", 0600,
				    pdata->xgbe_debugfs, pdata,
				    &xgmac_reg_value_fops);
	if (!pfile)
		netdev_err(pdata->netdev, "debugfs_create_file failed\n");

	pfile = debugfs_create_file("xpcs_mmd", 0600,
				    pdata->xgbe_debugfs, pdata,
				    &xpcs_mmd_fops);
	if (!pfile)
		netdev_err(pdata->netdev, "debugfs_create_file failed\n");

	pfile = debugfs_create_file("xpcs_register", 0600,
				    pdata->xgbe_debugfs, pdata,
				    &xpcs_reg_addr_fops);
	if (!pfile)
		netdev_err(pdata->netdev, "debugfs_create_file failed\n");

	pfile = debugfs_create_file("xpcs_register_value", 0600,
				    pdata->xgbe_debugfs, pdata,
				    &xpcs_reg_value_fops);
	if (!pfile)
		netdev_err(pdata->netdev, "debugfs_create_file failed\n");

	kfree(buf);
}

void xgbe_debugfs_exit(struct xgbe_prv_data *pdata)
{
	debugfs_remove_recursive(pdata->xgbe_debugfs);
	pdata->xgbe_debugfs = NULL;
}