[PATCH] remove many unneeded #includes of sched.h
[linux-2.6.git] / drivers / net / gianfar_sysfs.c
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 #define GFAR_ATTR(_name) \
41 static ssize_t gfar_show_##_name(struct class_device *cdev, char *buf); \
42 static ssize_t gfar_set_##_name(struct class_device *cdev, \
43                 const char *buf, size_t count); \
44 static CLASS_DEVICE_ATTR(_name, 0644, gfar_show_##_name, gfar_set_##_name)
45
46 #define GFAR_CREATE_FILE(_dev, _name) \
47         class_device_create_file(&_dev->class_dev, &class_device_attr_##_name)
48
49 GFAR_ATTR(bd_stash);
50 GFAR_ATTR(rx_stash_size);
51 GFAR_ATTR(rx_stash_index);
52 GFAR_ATTR(fifo_threshold);
53 GFAR_ATTR(fifo_starve);
54 GFAR_ATTR(fifo_starve_off);
55
56 #define to_net_dev(cd) container_of(cd, struct net_device, class_dev)
57
58 static ssize_t gfar_show_bd_stash(struct class_device *cdev, char *buf)
59 {
60         struct net_device *dev = to_net_dev(cdev);
61         struct gfar_private *priv = netdev_priv(dev);
62
63         return sprintf(buf, "%s\n", priv->bd_stash_en? "on" : "off");
64 }
65
66 static ssize_t gfar_set_bd_stash(struct class_device *cdev,
67                 const char *buf, size_t count)
68 {
69         struct net_device *dev = to_net_dev(cdev);
70         struct gfar_private *priv = netdev_priv(dev);
71         int new_setting = 0;
72         u32 temp;
73         unsigned long flags;
74
75         /* Find out the new setting */
76         if (!strncmp("on", buf, count-1) || !strncmp("1", buf, count-1))
77                 new_setting = 1;
78         else if (!strncmp("off", buf, count-1) || !strncmp("0", buf, count-1))
79                 new_setting = 0;
80         else
81                 return count;
82
83         spin_lock_irqsave(&priv->rxlock, flags);
84
85         /* Set the new stashing value */
86         priv->bd_stash_en = new_setting;
87
88         temp = gfar_read(&priv->regs->attr);
89
90         if (new_setting)
91                 temp |= ATTR_BDSTASH;
92         else
93                 temp &= ~(ATTR_BDSTASH);
94
95         gfar_write(&priv->regs->attr, temp);
96
97         spin_unlock_irqrestore(&priv->rxlock, flags);
98
99         return count;
100 }
101
102 static ssize_t gfar_show_rx_stash_size(struct class_device *cdev, char *buf)
103 {
104         struct net_device *dev = to_net_dev(cdev);
105         struct gfar_private *priv = netdev_priv(dev);
106
107         return sprintf(buf, "%d\n", priv->rx_stash_size);
108 }
109
110 static ssize_t gfar_set_rx_stash_size(struct class_device *cdev,
111                 const char *buf, size_t count)
112 {
113         struct net_device *dev = to_net_dev(cdev);
114         struct gfar_private *priv = netdev_priv(dev);
115         unsigned int length = simple_strtoul(buf, NULL, 0);
116         u32 temp;
117         unsigned long flags;
118
119         spin_lock_irqsave(&priv->rxlock, flags);
120         if (length > priv->rx_buffer_size)
121                 return count;
122
123         if (length == priv->rx_stash_size)
124                 return count;
125
126         priv->rx_stash_size = length;
127
128         temp = gfar_read(&priv->regs->attreli);
129         temp &= ~ATTRELI_EL_MASK;
130         temp |= ATTRELI_EL(length);
131         gfar_write(&priv->regs->attreli, temp);
132
133         /* Turn stashing on/off as appropriate */
134         temp = gfar_read(&priv->regs->attr);
135
136         if (length)
137                 temp |= ATTR_BUFSTASH;
138         else
139                 temp &= ~(ATTR_BUFSTASH);
140
141         gfar_write(&priv->regs->attr, temp);
142
143         spin_unlock_irqrestore(&priv->rxlock, flags);
144
145         return count;
146 }
147
148
149 /* Stashing will only be enabled when rx_stash_size != 0 */
150 static ssize_t gfar_show_rx_stash_index(struct class_device *cdev, char *buf)
151 {
152         struct net_device *dev = to_net_dev(cdev);
153         struct gfar_private *priv = netdev_priv(dev);
154
155         return sprintf(buf, "%d\n", priv->rx_stash_index);
156 }
157
158 static ssize_t gfar_set_rx_stash_index(struct class_device *cdev,
159                 const char *buf, size_t count)
160 {
161         struct net_device *dev = to_net_dev(cdev);
162         struct gfar_private *priv = netdev_priv(dev);
163         unsigned short index = simple_strtoul(buf, NULL, 0);
164         u32 temp;
165         unsigned long flags;
166
167         spin_lock_irqsave(&priv->rxlock, flags);
168         if (index > priv->rx_stash_size)
169                 return count;
170
171         if (index == priv->rx_stash_index)
172                 return count;
173
174         priv->rx_stash_index = index;
175
176         temp = gfar_read(&priv->regs->attreli);
177         temp &= ~ATTRELI_EI_MASK;
178         temp |= ATTRELI_EI(index);
179         gfar_write(&priv->regs->attreli, flags);
180
181         spin_unlock_irqrestore(&priv->rxlock, flags);
182
183         return count;
184 }
185
186 static ssize_t gfar_show_fifo_threshold(struct class_device *cdev, char *buf)
187 {
188         struct net_device *dev = to_net_dev(cdev);
189         struct gfar_private *priv = netdev_priv(dev);
190
191         return sprintf(buf, "%d\n", priv->fifo_threshold);
192 }
193
194 static ssize_t gfar_set_fifo_threshold(struct class_device *cdev,
195                 const char *buf, size_t count)
196 {
197         struct net_device *dev = to_net_dev(cdev);
198         struct gfar_private *priv = netdev_priv(dev);
199         unsigned int length = simple_strtoul(buf, NULL, 0);
200         u32 temp;
201         unsigned long flags;
202
203         if (length > GFAR_MAX_FIFO_THRESHOLD)
204                 return count;
205
206         spin_lock_irqsave(&priv->txlock, flags);
207
208         priv->fifo_threshold = length;
209
210         temp = gfar_read(&priv->regs->fifo_tx_thr);
211         temp &= ~FIFO_TX_THR_MASK;
212         temp |= length;
213         gfar_write(&priv->regs->fifo_tx_thr, temp);
214
215         spin_unlock_irqrestore(&priv->txlock, flags);
216
217         return count;
218 }
219
220 static ssize_t gfar_show_fifo_starve(struct class_device *cdev, char *buf)
221 {
222         struct net_device *dev = to_net_dev(cdev);
223         struct gfar_private *priv = netdev_priv(dev);
224
225         return sprintf(buf, "%d\n", priv->fifo_starve);
226 }
227
228
229 static ssize_t gfar_set_fifo_starve(struct class_device *cdev,
230                 const char *buf, size_t count)
231 {
232         struct net_device *dev = to_net_dev(cdev);
233         struct gfar_private *priv = netdev_priv(dev);
234         unsigned int num = simple_strtoul(buf, NULL, 0);
235         u32 temp;
236         unsigned long flags;
237
238         if (num > GFAR_MAX_FIFO_STARVE)
239                 return count;
240
241         spin_lock_irqsave(&priv->txlock, flags);
242
243         priv->fifo_starve = num;
244
245         temp = gfar_read(&priv->regs->fifo_tx_starve);
246         temp &= ~FIFO_TX_STARVE_MASK;
247         temp |= num;
248         gfar_write(&priv->regs->fifo_tx_starve, temp);
249
250         spin_unlock_irqrestore(&priv->txlock, flags);
251
252         return count;
253 }
254
255 static ssize_t gfar_show_fifo_starve_off(struct class_device *cdev, char *buf)
256 {
257         struct net_device *dev = to_net_dev(cdev);
258         struct gfar_private *priv = netdev_priv(dev);
259
260         return sprintf(buf, "%d\n", priv->fifo_starve_off);
261 }
262
263 static ssize_t gfar_set_fifo_starve_off(struct class_device *cdev,
264                 const char *buf, size_t count)
265 {
266         struct net_device *dev = to_net_dev(cdev);
267         struct gfar_private *priv = netdev_priv(dev);
268         unsigned int num = simple_strtoul(buf, NULL, 0);
269         u32 temp;
270         unsigned long flags;
271
272         if (num > GFAR_MAX_FIFO_STARVE_OFF)
273                 return count;
274
275         spin_lock_irqsave(&priv->txlock, flags);
276
277         priv->fifo_starve_off = num;
278
279         temp = gfar_read(&priv->regs->fifo_tx_starve_shutoff);
280         temp &= ~FIFO_TX_STARVE_OFF_MASK;
281         temp |= num;
282         gfar_write(&priv->regs->fifo_tx_starve_shutoff, temp);
283
284         spin_unlock_irqrestore(&priv->txlock, flags);
285
286         return count;
287 }
288
289 void gfar_init_sysfs(struct net_device *dev)
290 {
291         struct gfar_private *priv = netdev_priv(dev);
292
293         /* Initialize the default values */
294         priv->rx_stash_size = DEFAULT_STASH_LENGTH;
295         priv->rx_stash_index = DEFAULT_STASH_INDEX;
296         priv->fifo_threshold = DEFAULT_FIFO_TX_THR;
297         priv->fifo_starve = DEFAULT_FIFO_TX_STARVE;
298         priv->fifo_starve_off = DEFAULT_FIFO_TX_STARVE_OFF;
299         priv->bd_stash_en = DEFAULT_BD_STASH;
300
301         /* Create our sysfs files */
302         GFAR_CREATE_FILE(dev, bd_stash);
303         GFAR_CREATE_FILE(dev, rx_stash_size);
304         GFAR_CREATE_FILE(dev, rx_stash_index);
305         GFAR_CREATE_FILE(dev, fifo_threshold);
306         GFAR_CREATE_FILE(dev, fifo_starve);
307         GFAR_CREATE_FILE(dev, fifo_starve_off);
308
309 }