1 /*
2 * drivers/net/gianfar_sysfs.c
3 *
4 * Gianfar Ethernet Driver
5 * This driver is designed for the non-CPM ethernet controllers
6 * on the 85xx and 83xx family of integrated processors
7 * Based on 8260_io/fcc_enet.c
8 *
9 * Author: Andy Fleming
10 * Maintainer: Kumar Gala (galak@kernel.crashing.org)
11 *
12 * Copyright (c) 2002-2005 Freescale Semiconductor, Inc.
13 *
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the License, or (at your
17 * option) any later version.
18 *
19 * Sysfs file creation and management
20 */
21
22 #include <linux/kernel.h>
23 #include <linux/string.h>
24 #include <linux/errno.h>
25 #include <linux/unistd.h>
26 #include <linux/slab.h>
27 #include <linux/init.h>
28 #include <linux/delay.h>
29 #include <linux/etherdevice.h>
30 #include <linux/spinlock.h>
31 #include <linux/mm.h>
32 #include <linux/device.h>
33
34 #include <asm/uaccess.h>
35 #include <linux/module.h>
36 #include <linux/version.h>
37
38 #include "gianfar.h"
39
40 static ssize_t gfar_show_bd_stash(struct device *dev,
41 struct device_attribute *attr, char *buf)
42 {
43 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
44
45 return sprintf(buf, "%s\n", priv->bd_stash_en ? "on" : "off");
46 }
47
48 static ssize_t gfar_set_bd_stash(struct device *dev,
49 struct device_attribute *attr,
50 const char *buf, size_t count)
51 {
52 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
53 int new_setting = 0;
54 u32 temp;
55 unsigned long flags;
56
57 /* Find out the new setting */
58 if (!strncmp("on", buf, count - 1) || !strncmp("1", buf, count - 1))
59 new_setting = 1;
60 else if (!strncmp("off", buf, count - 1)
61 || !strncmp("", buf, count - 1))
62 new_setting = 0;
63 else
64 return count;
65
66 spin_lock_irqsave(&priv->rxlock, flags);
67
68 /* Set the new stashing value */
69 priv->bd_stash_en = new_setting;
70
71 temp = gfar_read(&priv->regs->attr);
72
73 if (new_setting)
74 temp |= ATTR_BDSTASH;
75 else
76 temp &= ~(ATTR_BDSTASH);
77
78 gfar_write(&priv->regs->attr, temp);
79
80 spin_unlock_irqrestore(&priv->rxlock, flags);
81
82 return count;
83 }
84
85 DEVICE_ATTR(bd_stash, 0644, gfar_show_bd_stash, gfar_set_bd_stash);
86
87 static ssize_t gfar_show_rx_stash_size(struct device *dev,
88 struct device_attribute *attr, char *buf)
89 {
90 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
91
92 return sprintf(buf, "%d\n", priv->rx_stash_size);
93 }
94
95 static ssize_t gfar_set_rx_stash_size(struct device *dev,
96 struct device_attribute *attr,
97 const char *buf, size_t count)
98 {
99 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
100 unsigned int length = simple_strtoul(buf, NULL, 0);
101 u32 temp;
102 unsigned long flags;
103
104 spin_lock_irqsave(&priv->rxlock, flags);
105 if (length > priv->rx_buffer_size)
106 return count;
107
108 if (length == priv->rx_stash_size)
109 return count;
110
111 priv->rx_stash_size = length;
112
113 temp = gfar_read(&priv->regs->attreli);
114 temp &= ~ATTRELI_EL_MASK;
115 temp |= ATTRELI_EL(length);
116 gfar_write(&priv->regs->attreli, temp);
117
118 /* Turn stashing on/off as appropriate */
119 temp = gfar_read(&priv->regs->attr);
120
121 if (length)
122 temp |= ATTR_BUFSTASH;
123 else
124 temp &= ~(ATTR_BUFSTASH);
125
126 gfar_write(&priv->regs->attr, temp);
127
128 spin_unlock_irqrestore(&priv->rxlock, flags);
129
130 return count;
131 }
132
133 DEVICE_ATTR(rx_stash_size, 0644, gfar_show_rx_stash_size,
134 gfar_set_rx_stash_size);
135
136 /* Stashing will only be enabled when rx_stash_size != 0 */
137 static ssize_t gfar_show_rx_stash_index(struct device *dev,
138 struct device_attribute *attr,
139 char *buf)
140 {
141 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
142
143 return sprintf(buf, "%d\n", priv->rx_stash_index);
144 }
145
146 static ssize_t gfar_set_rx_stash_index(struct device *dev,
147 struct device_attribute *attr,
148 const char *buf, size_t count)
149 {
150 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
151 unsigned short index = simple_strtoul(buf, NULL, 0);
152 u32 temp;
153 unsigned long flags;
154
155 spin_lock_irqsave(&priv->rxlock, flags);
156 if (index > priv->rx_stash_size)
157 return count;
158
159 if (index == priv->rx_stash_index)
160 return count;
161
162 priv->rx_stash_index = index;
163
164 temp = gfar_read(&priv->regs->attreli);
165 temp &= ~ATTRELI_EI_MASK;
166 temp |= ATTRELI_EI(index);
167 gfar_write(&priv->regs->attreli, flags);
168
169 spin_unlock_irqrestore(&priv->rxlock, flags);
170
171 return count;
172 }
173
174 DEVICE_ATTR(rx_stash_index, 0644, gfar_show_rx_stash_index,
175 gfar_set_rx_stash_index);
176
177 static ssize_t gfar_show_fifo_threshold(struct device *dev,
178 struct device_attribute *attr,
179 char *buf)
180 {
181 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
182
183 return sprintf(buf, "%d\n", priv->fifo_threshold);
184 }
185
186 static ssize_t gfar_set_fifo_threshold(struct device *dev,
187 struct device_attribute *attr,
188 const char *buf, size_t count)
189 {
190 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
191 unsigned int length = simple_strtoul(buf, NULL, 0);
192 u32 temp;
193 unsigned long flags;
194
195 if (length > GFAR_MAX_FIFO_THRESHOLD)
196 return count;
197
198 spin_lock_irqsave(&priv->txlock, flags);
199
200 priv->fifo_threshold = length;
201
202 temp = gfar_read(&priv->regs->fifo_tx_thr);
203 temp &= ~FIFO_TX_THR_MASK;
204 temp |= length;
205 gfar_write(&priv->regs->fifo_tx_thr, temp);
206
207 spin_unlock_irqrestore(&priv->txlock, flags);
208
209 return count;
210 }
211
212 DEVICE_ATTR(fifo_threshold, 0644, gfar_show_fifo_threshold,
213 gfar_set_fifo_threshold);
214
215 static ssize_t gfar_show_fifo_starve(struct device *dev,
216 struct device_attribute *attr, char *buf)
217 {
218 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
219
220 return sprintf(buf, "%d\n", priv->fifo_starve);
221 }
222
223 static ssize_t gfar_set_fifo_starve(struct device *dev,
224 struct device_attribute *attr,
225 const char *buf, size_t count)
226 {
227 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
228 unsigned int num = simple_strtoul(buf, NULL, 0);
229 u32 temp;
230 unsigned long flags;
231
232 if (num > GFAR_MAX_FIFO_STARVE)
233 return count;
234
235 spin_lock_irqsave(&priv->txlock, flags);
236
237 priv->fifo_starve = num;
238
239 temp = gfar_read(&priv->regs->fifo_tx_starve);
240 temp &= ~FIFO_TX_STARVE_MASK;
241 temp |= num;
242 gfar_write(&priv->regs->fifo_tx_starve, temp);
243
244 spin_unlock_irqrestore(&priv->txlock, flags);
245
246 return count;
247 }
248
249 DEVICE_ATTR(fifo_starve, 0644, gfar_show_fifo_starve, gfar_set_fifo_starve);
250
251 static ssize_t gfar_show_fifo_starve_off(struct device *dev,
252 struct device_attribute *attr,
253 char *buf)
254 {
255 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
256
257 return sprintf(buf, "%d\n", priv->fifo_starve_off);
258 }
259
260 static ssize_t gfar_set_fifo_starve_off(struct device *dev,
261 struct device_attribute *attr,
262 const char *buf, size_t count)
263 {
264 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
265 unsigned int num = simple_strtoul(buf, NULL, 0);
266 u32 temp;
267 unsigned long flags;
268
269 if (num > GFAR_MAX_FIFO_STARVE_OFF)
270 return count;
271
272 spin_lock_irqsave(&priv->txlock, flags);
273
274 priv->fifo_starve_off = num;
275
276 temp = gfar_read(&priv->regs->fifo_tx_starve_shutoff);
277 temp &= ~FIFO_TX_STARVE_OFF_MASK;
278 temp |= num;
279 gfar_write(&priv->regs->fifo_tx_starve_shutoff, temp);
280
281 spin_unlock_irqrestore(&priv->txlock, flags);
282
283 return count;
284 }
285
286 DEVICE_ATTR(fifo_starve_off, 0644, gfar_show_fifo_starve_off,
287 gfar_set_fifo_starve_off);
288
289 void gfar_init_sysfs(struct net_device *dev)
290 {
291 struct gfar_private *priv = netdev_priv(dev);
292 int rc;
293
294 /* Initialize the default values */
295 priv->rx_stash_size = DEFAULT_STASH_LENGTH;
296 priv->rx_stash_index = DEFAULT_STASH_INDEX;
297 priv->fifo_threshold = DEFAULT_FIFO_TX_THR;
298 priv->fifo_starve = DEFAULT_FIFO_TX_STARVE;
299 priv->fifo_starve_off = DEFAULT_FIFO_TX_STARVE_OFF;
300 priv->bd_stash_en = DEFAULT_BD_STASH;
301
302 /* Create our sysfs files */
303 rc = device_create_file(&dev->dev, &dev_attr_bd_stash);
304 rc |= device_create_file(&dev->dev, &dev_attr_rx_stash_size);
305 rc |= device_create_file(&dev->dev, &dev_attr_rx_stash_index);
306 rc |= device_create_file(&dev->dev, &dev_attr_fifo_threshold);
307 rc |= device_create_file(&dev->dev, &dev_attr_fifo_starve);
308 rc |= device_create_file(&dev->dev, &dev_attr_fifo_starve_off);
309 if (rc)
310 dev_err(&dev->dev, "Error creating gianfar sysfs files.\n");
311 }
312
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