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
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/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>
33 #include <linux/device.h>
35 #include <asm/uaccess.h>
36 #include <linux/module.h>
37 #include <linux/version.h>
41 #define GFAR_ATTR(_name) \
42 static ssize_t gfar_show_##_name(struct device *dev, \
43 struct device_attribute *attr, char *buf); \
44 static ssize_t gfar_set_##_name(struct device *dev, \
45 struct device_attribute *attr, \
46 const char *buf, size_t count); \
47 static DEVICE_ATTR(_name, 0644, gfar_show_##_name, gfar_set_##_name)
49 #define GFAR_CREATE_FILE(_dev, _name) \
50 device_create_file(&_dev->dev, &dev_attr_##_name)
53 GFAR_ATTR(rx_stash_size);
54 GFAR_ATTR(rx_stash_index);
55 GFAR_ATTR(fifo_threshold);
56 GFAR_ATTR(fifo_starve);
57 GFAR_ATTR(fifo_starve_off);
59 static ssize_t gfar_show_bd_stash(struct device *dev,
60 struct device_attribute *attr, char *buf)
62 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
64 return sprintf(buf, "%s\n", priv->bd_stash_en ? "on" : "off");
67 static ssize_t gfar_set_bd_stash(struct device *dev,
68 struct device_attribute *attr,
69 const char *buf, size_t count)
71 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
76 /* Find out the new setting */
77 if (!strncmp("on", buf, count - 1) || !strncmp("1", buf, count - 1))
79 else if (!strncmp("off", buf, count - 1)
80 || !strncmp("0", buf, count - 1))
85 spin_lock_irqsave(&priv->rxlock, flags);
87 /* Set the new stashing value */
88 priv->bd_stash_en = new_setting;
90 temp = gfar_read(&priv->regs->attr);
95 temp &= ~(ATTR_BDSTASH);
97 gfar_write(&priv->regs->attr, temp);
99 spin_unlock_irqrestore(&priv->rxlock, flags);
104 static ssize_t gfar_show_rx_stash_size(struct device *dev,
105 struct device_attribute *attr, char *buf)
107 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
109 return sprintf(buf, "%d\n", priv->rx_stash_size);
112 static ssize_t gfar_set_rx_stash_size(struct device *dev,
113 struct device_attribute *attr,
114 const char *buf, size_t count)
116 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
117 unsigned int length = simple_strtoul(buf, NULL, 0);
121 spin_lock_irqsave(&priv->rxlock, flags);
122 if (length > priv->rx_buffer_size)
125 if (length == priv->rx_stash_size)
128 priv->rx_stash_size = length;
130 temp = gfar_read(&priv->regs->attreli);
131 temp &= ~ATTRELI_EL_MASK;
132 temp |= ATTRELI_EL(length);
133 gfar_write(&priv->regs->attreli, temp);
135 /* Turn stashing on/off as appropriate */
136 temp = gfar_read(&priv->regs->attr);
139 temp |= ATTR_BUFSTASH;
141 temp &= ~(ATTR_BUFSTASH);
143 gfar_write(&priv->regs->attr, temp);
145 spin_unlock_irqrestore(&priv->rxlock, flags);
150 /* Stashing will only be enabled when rx_stash_size != 0 */
151 static ssize_t gfar_show_rx_stash_index(struct device *dev,
152 struct device_attribute *attr,
155 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
157 return sprintf(buf, "%d\n", priv->rx_stash_index);
160 static ssize_t gfar_set_rx_stash_index(struct device *dev,
161 struct device_attribute *attr,
162 const char *buf, size_t count)
164 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
165 unsigned short index = simple_strtoul(buf, NULL, 0);
169 spin_lock_irqsave(&priv->rxlock, flags);
170 if (index > priv->rx_stash_size)
173 if (index == priv->rx_stash_index)
176 priv->rx_stash_index = index;
178 temp = gfar_read(&priv->regs->attreli);
179 temp &= ~ATTRELI_EI_MASK;
180 temp |= ATTRELI_EI(index);
181 gfar_write(&priv->regs->attreli, flags);
183 spin_unlock_irqrestore(&priv->rxlock, flags);
188 static ssize_t gfar_show_fifo_threshold(struct device *dev,
189 struct device_attribute *attr,
192 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
194 return sprintf(buf, "%d\n", priv->fifo_threshold);
197 static ssize_t gfar_set_fifo_threshold(struct device *dev,
198 struct device_attribute *attr,
199 const char *buf, size_t count)
201 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
202 unsigned int length = simple_strtoul(buf, NULL, 0);
206 if (length > GFAR_MAX_FIFO_THRESHOLD)
209 spin_lock_irqsave(&priv->txlock, flags);
211 priv->fifo_threshold = length;
213 temp = gfar_read(&priv->regs->fifo_tx_thr);
214 temp &= ~FIFO_TX_THR_MASK;
216 gfar_write(&priv->regs->fifo_tx_thr, temp);
218 spin_unlock_irqrestore(&priv->txlock, flags);
223 static ssize_t gfar_show_fifo_starve(struct device *dev,
224 struct device_attribute *attr, char *buf)
226 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
228 return sprintf(buf, "%d\n", priv->fifo_starve);
231 static ssize_t gfar_set_fifo_starve(struct device *dev,
232 struct device_attribute *attr,
233 const char *buf, size_t count)
235 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
236 unsigned int num = simple_strtoul(buf, NULL, 0);
240 if (num > GFAR_MAX_FIFO_STARVE)
243 spin_lock_irqsave(&priv->txlock, flags);
245 priv->fifo_starve = num;
247 temp = gfar_read(&priv->regs->fifo_tx_starve);
248 temp &= ~FIFO_TX_STARVE_MASK;
250 gfar_write(&priv->regs->fifo_tx_starve, temp);
252 spin_unlock_irqrestore(&priv->txlock, flags);
257 static ssize_t gfar_show_fifo_starve_off(struct device *dev,
258 struct device_attribute *attr,
261 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
263 return sprintf(buf, "%d\n", priv->fifo_starve_off);
266 static ssize_t gfar_set_fifo_starve_off(struct device *dev,
267 struct device_attribute *attr,
268 const char *buf, size_t count)
270 struct gfar_private *priv = netdev_priv(to_net_dev(dev));
271 unsigned int num = simple_strtoul(buf, NULL, 0);
275 if (num > GFAR_MAX_FIFO_STARVE_OFF)
278 spin_lock_irqsave(&priv->txlock, flags);
280 priv->fifo_starve_off = num;
282 temp = gfar_read(&priv->regs->fifo_tx_starve_shutoff);
283 temp &= ~FIFO_TX_STARVE_OFF_MASK;
285 gfar_write(&priv->regs->fifo_tx_starve_shutoff, temp);
287 spin_unlock_irqrestore(&priv->txlock, flags);
292 void gfar_init_sysfs(struct net_device *dev)
294 struct gfar_private *priv = netdev_priv(dev);
296 /* Initialize the default values */
297 priv->rx_stash_size = DEFAULT_STASH_LENGTH;
298 priv->rx_stash_index = DEFAULT_STASH_INDEX;
299 priv->fifo_threshold = DEFAULT_FIFO_TX_THR;
300 priv->fifo_starve = DEFAULT_FIFO_TX_STARVE;
301 priv->fifo_starve_off = DEFAULT_FIFO_TX_STARVE_OFF;
302 priv->bd_stash_en = DEFAULT_BD_STASH;
304 /* Create our sysfs files */
305 GFAR_CREATE_FILE(dev, bd_stash);
306 GFAR_CREATE_FILE(dev, rx_stash_size);
307 GFAR_CREATE_FILE(dev, rx_stash_index);
308 GFAR_CREATE_FILE(dev, fifo_threshold);
309 GFAR_CREATE_FILE(dev, fifo_starve);
310 GFAR_CREATE_FILE(dev, fifo_starve_off);