fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / drivers / net / gianfar_sysfs.c
blobaec9ab17a9a5884df180ac4e26ec59b3ec82185c
1 /*
2 * drivers/net/gianfar_sysfs.c
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
9 * Author: Andy Fleming
10 * Maintainer: Kumar Gala (galak@kernel.crashing.org)
12 * Copyright (c) 2002-2005 Freescale Semiconductor, Inc.
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.
19 * Sysfs file creation and management
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>
34 #include <asm/uaccess.h>
35 #include <linux/module.h>
36 #include <linux/version.h>
38 #include "gianfar.h"
40 #define GFAR_ATTR(_name) \
41 static ssize_t gfar_show_##_name(struct device *dev, \
42 struct device_attribute *attr, char *buf); \
43 static ssize_t gfar_set_##_name(struct device *dev, \
44 struct device_attribute *attr, \
45 const char *buf, size_t count); \
46 static DEVICE_ATTR(_name, 0644, gfar_show_##_name, gfar_set_##_name)
48 #define GFAR_CREATE_FILE(_dev, _name) \
49 device_create_file(&_dev->dev, &dev_attr_##_name)
51 GFAR_ATTR(bd_stash);
52 GFAR_ATTR(rx_stash_size);
53 GFAR_ATTR(rx_stash_index);
54 GFAR_ATTR(fifo_threshold);
55 GFAR_ATTR(fifo_starve);
56 GFAR_ATTR(fifo_starve_off);
58 static ssize_t gfar_show_bd_stash(struct device *dev,
59 struct device_attribute *attr, char *buf)
61 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
63 return sprintf(buf, "%s\n", priv->bd_stash_en ? "on" : "off");
66 static ssize_t gfar_set_bd_stash(struct device *dev,
67 struct device_attribute *attr,
68 const char *buf, size_t count)
70 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
71 int new_setting = 0;
72 u32 temp;
73 unsigned long flags;
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)
79 || !strncmp("0", buf, count - 1))
80 new_setting = 0;
81 else
82 return count;
84 spin_lock_irqsave(&priv->rxlock, flags);
86 /* Set the new stashing value */
87 priv->bd_stash_en = new_setting;
89 temp = gfar_read(&priv->regs->attr);
91 if (new_setting)
92 temp |= ATTR_BDSTASH;
93 else
94 temp &= ~(ATTR_BDSTASH);
96 gfar_write(&priv->regs->attr, temp);
98 spin_unlock_irqrestore(&priv->rxlock, flags);
100 return count;
103 static ssize_t gfar_show_rx_stash_size(struct device *dev,
104 struct device_attribute *attr, char *buf)
106 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
108 return sprintf(buf, "%d\n", priv->rx_stash_size);
111 static ssize_t gfar_set_rx_stash_size(struct device *dev,
112 struct device_attribute *attr,
113 const char *buf, size_t count)
115 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
116 unsigned int length = simple_strtoul(buf, NULL, 0);
117 u32 temp;
118 unsigned long flags;
120 spin_lock_irqsave(&priv->rxlock, flags);
121 if (length > priv->rx_buffer_size)
122 return count;
124 if (length == priv->rx_stash_size)
125 return count;
127 priv->rx_stash_size = length;
129 temp = gfar_read(&priv->regs->attreli);
130 temp &= ~ATTRELI_EL_MASK;
131 temp |= ATTRELI_EL(length);
132 gfar_write(&priv->regs->attreli, temp);
134 /* Turn stashing on/off as appropriate */
135 temp = gfar_read(&priv->regs->attr);
137 if (length)
138 temp |= ATTR_BUFSTASH;
139 else
140 temp &= ~(ATTR_BUFSTASH);
142 gfar_write(&priv->regs->attr, temp);
144 spin_unlock_irqrestore(&priv->rxlock, flags);
146 return count;
149 /* Stashing will only be enabled when rx_stash_size != 0 */
150 static ssize_t gfar_show_rx_stash_index(struct device *dev,
151 struct device_attribute *attr,
152 char *buf)
154 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
156 return sprintf(buf, "%d\n", priv->rx_stash_index);
159 static ssize_t gfar_set_rx_stash_index(struct device *dev,
160 struct device_attribute *attr,
161 const char *buf, size_t count)
163 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
164 unsigned short index = simple_strtoul(buf, NULL, 0);
165 u32 temp;
166 unsigned long flags;
168 spin_lock_irqsave(&priv->rxlock, flags);
169 if (index > priv->rx_stash_size)
170 return count;
172 if (index == priv->rx_stash_index)
173 return count;
175 priv->rx_stash_index = index;
177 temp = gfar_read(&priv->regs->attreli);
178 temp &= ~ATTRELI_EI_MASK;
179 temp |= ATTRELI_EI(index);
180 gfar_write(&priv->regs->attreli, flags);
182 spin_unlock_irqrestore(&priv->rxlock, flags);
184 return count;
187 static ssize_t gfar_show_fifo_threshold(struct device *dev,
188 struct device_attribute *attr,
189 char *buf)
191 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
193 return sprintf(buf, "%d\n", priv->fifo_threshold);
196 static ssize_t gfar_set_fifo_threshold(struct device *dev,
197 struct device_attribute *attr,
198 const char *buf, size_t count)
200 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
201 unsigned int length = simple_strtoul(buf, NULL, 0);
202 u32 temp;
203 unsigned long flags;
205 if (length > GFAR_MAX_FIFO_THRESHOLD)
206 return count;
208 spin_lock_irqsave(&priv->txlock, flags);
210 priv->fifo_threshold = length;
212 temp = gfar_read(&priv->regs->fifo_tx_thr);
213 temp &= ~FIFO_TX_THR_MASK;
214 temp |= length;
215 gfar_write(&priv->regs->fifo_tx_thr, temp);
217 spin_unlock_irqrestore(&priv->txlock, flags);
219 return count;
222 static ssize_t gfar_show_fifo_starve(struct device *dev,
223 struct device_attribute *attr, char *buf)
225 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
227 return sprintf(buf, "%d\n", priv->fifo_starve);
230 static ssize_t gfar_set_fifo_starve(struct device *dev,
231 struct device_attribute *attr,
232 const char *buf, size_t count)
234 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
235 unsigned int num = simple_strtoul(buf, NULL, 0);
236 u32 temp;
237 unsigned long flags;
239 if (num > GFAR_MAX_FIFO_STARVE)
240 return count;
242 spin_lock_irqsave(&priv->txlock, flags);
244 priv->fifo_starve = num;
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);
251 spin_unlock_irqrestore(&priv->txlock, flags);
253 return count;
256 static ssize_t gfar_show_fifo_starve_off(struct device *dev,
257 struct device_attribute *attr,
258 char *buf)
260 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
262 return sprintf(buf, "%d\n", priv->fifo_starve_off);
265 static ssize_t gfar_set_fifo_starve_off(struct device *dev,
266 struct device_attribute *attr,
267 const char *buf, size_t count)
269 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
270 unsigned int num = simple_strtoul(buf, NULL, 0);
271 u32 temp;
272 unsigned long flags;
274 if (num > GFAR_MAX_FIFO_STARVE_OFF)
275 return count;
277 spin_lock_irqsave(&priv->txlock, flags);
279 priv->fifo_starve_off = num;
281 temp = gfar_read(&priv->regs->fifo_tx_starve_shutoff);
282 temp &= ~FIFO_TX_STARVE_OFF_MASK;
283 temp |= num;
284 gfar_write(&priv->regs->fifo_tx_starve_shutoff, temp);
286 spin_unlock_irqrestore(&priv->txlock, flags);
288 return count;
291 void gfar_init_sysfs(struct net_device *dev)
293 struct gfar_private *priv = netdev_priv(dev);
295 /* Initialize the default values */
296 priv->rx_stash_size = DEFAULT_STASH_LENGTH;
297 priv->rx_stash_index = DEFAULT_STASH_INDEX;
298 priv->fifo_threshold = DEFAULT_FIFO_TX_THR;
299 priv->fifo_starve = DEFAULT_FIFO_TX_STARVE;
300 priv->fifo_starve_off = DEFAULT_FIFO_TX_STARVE_OFF;
301 priv->bd_stash_en = DEFAULT_BD_STASH;
303 /* Create our sysfs files */
304 GFAR_CREATE_FILE(dev, bd_stash);
305 GFAR_CREATE_FILE(dev, rx_stash_size);
306 GFAR_CREATE_FILE(dev, rx_stash_index);
307 GFAR_CREATE_FILE(dev, fifo_threshold);
308 GFAR_CREATE_FILE(dev, fifo_starve);
309 GFAR_CREATE_FILE(dev, fifo_starve_off);