Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...
[linux-2.6] / 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/sched.h>
24 #include <linux/string.h>
25 #include <linux/errno.h>
26 #include <linux/unistd.h>
27 #include <linux/slab.h>
28 #include <linux/init.h>
29 #include <linux/delay.h>
30 #include <linux/etherdevice.h>
31 #include <linux/spinlock.h>
32 #include <linux/mm.h>
33 #include <linux/device.h>
34
35 #include <asm/uaccess.h>
36 #include <linux/module.h>
37 #include <linux/version.h>
38
39 #include "gianfar.h"
40
41 #define GFAR_ATTR(_name) \
42 static ssize_t gfar_show_##_name(struct class_device *cdev, char *buf); \
43 static ssize_t gfar_set_##_name(struct class_device *cdev, \
44                 const char *buf, size_t count); \
45 static CLASS_DEVICE_ATTR(_name, 0644, gfar_show_##_name, gfar_set_##_name)
46
47 #define GFAR_CREATE_FILE(_dev, _name) \
48         class_device_create_file(&_dev->class_dev, &class_device_attr_##_name)
49
50 GFAR_ATTR(bd_stash);
51 GFAR_ATTR(rx_stash_size);
52 GFAR_ATTR(rx_stash_index);
53 GFAR_ATTR(fifo_threshold);
54 GFAR_ATTR(fifo_starve);
55 GFAR_ATTR(fifo_starve_off);
56
57 #define to_net_dev(cd) container_of(cd, struct net_device, class_dev)
58
59 static ssize_t gfar_show_bd_stash(struct class_device *cdev, char *buf)
60 {
61         struct net_device *dev = to_net_dev(cdev);
62         struct gfar_private *priv = netdev_priv(dev);
63
64         return sprintf(buf, "%s\n", priv->bd_stash_en? "on" : "off");
65 }
66
67 static ssize_t gfar_set_bd_stash(struct class_device *cdev,
68                 const char *buf, size_t count)
69 {
70         struct net_device *dev = to_net_dev(cdev);
71         struct gfar_private *priv = netdev_priv(dev);
72         int new_setting = 0;
73         u32 temp;
74         unsigned long flags;
75
76         /* Find out the new setting */
77         if (!strncmp("on", buf, count-1) || !strncmp("1", buf, count-1))
78                 new_setting = 1;
79         else if (!strncmp("off", buf, count-1) || !strncmp("0", buf, count-1))
80                 new_setting = 0;
81         else
82                 return count;
83
84         spin_lock_irqsave(&priv->rxlock, flags);
85
86         /* Set the new stashing value */
87         priv->bd_stash_en = new_setting;
88
89         temp = gfar_read(&priv->regs->attr);
90
91         if (new_setting)
92                 temp |= ATTR_BDSTASH;
93         else
94                 temp &= ~(ATTR_BDSTASH);
95
96         gfar_write(&priv->regs->attr, temp);
97
98         spin_unlock_irqrestore(&priv->rxlock, flags);
99
100         return count;
101 }
102
103 static ssize_t gfar_show_rx_stash_size(struct class_device *cdev, char *buf)
104 {
105         struct net_device *dev = to_net_dev(cdev);
106         struct gfar_private *priv = netdev_priv(dev);
107
108         return sprintf(buf, "%d\n", priv->rx_stash_size);
109 }
110
111 static ssize_t gfar_set_rx_stash_size(struct class_device *cdev,
112                 const char *buf, size_t count)
113 {
114         struct net_device *dev = to_net_dev(cdev);
115         struct gfar_private *priv = netdev_priv(dev);
116         unsigned int length = simple_strtoul(buf, NULL, 0);
117         u32 temp;
118         unsigned long flags;
119
120         spin_lock_irqsave(&priv->rxlock, flags);
121         if (length > priv->rx_buffer_size)
122                 return count;
123
124         if (length == priv->rx_stash_size)
125                 return count;
126
127         priv->rx_stash_size = length;
128
129         temp = gfar_read(&priv->regs->attreli);
130         temp &= ~ATTRELI_EL_MASK;
131         temp |= ATTRELI_EL(length);
132         gfar_write(&priv->regs->attreli, temp);
133
134         /* Turn stashing on/off as appropriate */
135         temp = gfar_read(&priv->regs->attr);
136
137         if (length)
138                 temp |= ATTR_BUFSTASH;
139         else
140                 temp &= ~(ATTR_BUFSTASH);
141
142         gfar_write(&priv->regs->attr, temp);
143
144         spin_unlock_irqrestore(&priv->rxlock, flags);
145
146         return count;
147 }
148
149
150 /* Stashing will only be enabled when rx_stash_size != 0 */
151 static ssize_t gfar_show_rx_stash_index(struct class_device *cdev, char *buf)
152 {
153         struct net_device *dev = to_net_dev(cdev);
154         struct gfar_private *priv = netdev_priv(dev);
155
156         return sprintf(buf, "%d\n", priv->rx_stash_index);
157 }
158
159 static ssize_t gfar_set_rx_stash_index(struct class_device *cdev,
160                 const char *buf, size_t count)
161 {
162         struct net_device *dev = to_net_dev(cdev);
163         struct gfar_private *priv = netdev_priv(dev);
164         unsigned short index = simple_strtoul(buf, NULL, 0);
165         u32 temp;
166         unsigned long flags;
167
168         spin_lock_irqsave(&priv->rxlock, flags);
169         if (index > priv->rx_stash_size)
170                 return count;
171
172         if (index == priv->rx_stash_index)
173                 return count;
174
175         priv->rx_stash_index = index;
176
177         temp = gfar_read(&priv->regs->attreli);
178         temp &= ~ATTRELI_EI_MASK;
179         temp |= ATTRELI_EI(index);
180         gfar_write(&priv->regs->attreli, flags);
181
182         spin_unlock_irqrestore(&priv->rxlock, flags);
183
184         return count;
185 }
186
187 static ssize_t gfar_show_fifo_threshold(struct class_device *cdev, char *buf)
188 {
189         struct net_device *dev = to_net_dev(cdev);
190         struct gfar_private *priv = netdev_priv(dev);
191
192         return sprintf(buf, "%d\n", priv->fifo_threshold);
193 }
194
195 static ssize_t gfar_set_fifo_threshold(struct class_device *cdev,
196                 const char *buf, size_t count)
197 {
198         struct net_device *dev = to_net_dev(cdev);
199         struct gfar_private *priv = netdev_priv(dev);
200         unsigned int length = simple_strtoul(buf, NULL, 0);
201         u32 temp;
202         unsigned long flags;
203
204         if (length > GFAR_MAX_FIFO_THRESHOLD)
205                 return count;
206
207         spin_lock_irqsave(&priv->txlock, flags);
208
209         priv->fifo_threshold = length;
210
211         temp = gfar_read(&priv->regs->fifo_tx_thr);
212         temp &= ~FIFO_TX_THR_MASK;
213         temp |= length;
214         gfar_write(&priv->regs->fifo_tx_thr, temp);
215
216         spin_unlock_irqrestore(&priv->txlock, flags);
217
218         return count;
219 }
220
221 static ssize_t gfar_show_fifo_starve(struct class_device *cdev, char *buf)
222 {
223         struct net_device *dev = to_net_dev(cdev);
224         struct gfar_private *priv = netdev_priv(dev);
225
226         return sprintf(buf, "%d\n", priv->fifo_starve);
227 }
228
229
230 static ssize_t gfar_set_fifo_starve(struct class_device *cdev,
231                 const char *buf, size_t count)
232 {
233         struct net_device *dev = to_net_dev(cdev);
234         struct gfar_private *priv = netdev_priv(dev);
235         unsigned int num = simple_strtoul(buf, NULL, 0);
236         u32 temp;
237         unsigned long flags;
238
239         if (num > GFAR_MAX_FIFO_STARVE)
240                 return count;
241
242         spin_lock_irqsave(&priv->txlock, flags);
243
244         priv->fifo_starve = num;
245
246         temp = gfar_read(&priv->regs->fifo_tx_starve);
247         temp &= ~FIFO_TX_STARVE_MASK;
248         temp |= num;
249         gfar_write(&priv->regs->fifo_tx_starve, temp);
250
251         spin_unlock_irqrestore(&priv->txlock, flags);
252
253         return count;
254 }
255
256 static ssize_t gfar_show_fifo_starve_off(struct class_device *cdev, char *buf)
257 {
258         struct net_device *dev = to_net_dev(cdev);
259         struct gfar_private *priv = netdev_priv(dev);
260
261         return sprintf(buf, "%d\n", priv->fifo_starve_off);
262 }
263
264 static ssize_t gfar_set_fifo_starve_off(struct class_device *cdev,
265                 const char *buf, size_t count)
266 {
267         struct net_device *dev = to_net_dev(cdev);
268         struct gfar_private *priv = netdev_priv(dev);
269         unsigned int num = simple_strtoul(buf, NULL, 0);
270         u32 temp;
271         unsigned long flags;
272
273         if (num > GFAR_MAX_FIFO_STARVE_OFF)
274                 return count;
275
276         spin_lock_irqsave(&priv->txlock, flags);
277
278         priv->fifo_starve_off = num;
279
280         temp = gfar_read(&priv->regs->fifo_tx_starve_shutoff);
281         temp &= ~FIFO_TX_STARVE_OFF_MASK;
282         temp |= num;
283         gfar_write(&priv->regs->fifo_tx_starve_shutoff, temp);
284
285         spin_unlock_irqrestore(&priv->txlock, flags);
286
287         return count;
288 }
289
290 void gfar_init_sysfs(struct net_device *dev)
291 {
292         struct gfar_private *priv = netdev_priv(dev);
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         GFAR_CREATE_FILE(dev, bd_stash);
304         GFAR_CREATE_FILE(dev, rx_stash_size);
305         GFAR_CREATE_FILE(dev, rx_stash_index);
306         GFAR_CREATE_FILE(dev, fifo_threshold);
307         GFAR_CREATE_FILE(dev, fifo_starve);
308         GFAR_CREATE_FILE(dev, fifo_starve_off);
309
310 }