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
);