[linux-2.6-block.git] / drivers / net / gianfar_sysfs.c

/*
 * drivers/net/gianfar_sysfs.c
 *
 * Gianfar Ethernet Driver
 * This driver is designed for the non-CPM ethernet controllers
 * on the 85xx and 83xx family of integrated processors
 * Based on 8260_io/fcc_enet.c
 *
 * Author: Andy Fleming
 * Maintainer: Kumar Gala (galak@kernel.crashing.org)
 *
 * Copyright (c) 2002-2005 Freescale Semiconductor, Inc.
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 *
 * Sysfs file creation and management
 */

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/device.h>

#include <asm/uaccess.h>
#include <linux/module.h>
#include <linux/version.h>

#include "gianfar.h"

#define GFAR_ATTR(_name) \
static ssize_t gfar_show_##_name(struct class_device *cdev, char *buf); \
static ssize_t gfar_set_##_name(struct class_device *cdev, \
		const char *buf, size_t count); \
static CLASS_DEVICE_ATTR(_name, 0644, gfar_show_##_name, gfar_set_##_name)

#define GFAR_CREATE_FILE(_dev, _name) \
	class_device_create_file(&_dev->class_dev, &class_device_attr_##_name)

GFAR_ATTR(bd_stash);
GFAR_ATTR(rx_stash_size);
GFAR_ATTR(rx_stash_index);
GFAR_ATTR(fifo_threshold);
GFAR_ATTR(fifo_starve);
GFAR_ATTR(fifo_starve_off);

#define to_net_dev(cd) container_of(cd, struct net_device, class_dev)

static ssize_t gfar_show_bd_stash(struct class_device *cdev, char *buf)
{
	struct net_device *dev = to_net_dev(cdev);
	struct gfar_private *priv = netdev_priv(dev);

	return sprintf(buf, "%s\n", priv->bd_stash_en? "on" : "off");
}

static ssize_t gfar_set_bd_stash(struct class_device *cdev,
		const char *buf, size_t count)
{
	struct net_device *dev = to_net_dev(cdev);
	struct gfar_private *priv = netdev_priv(dev);
	int new_setting = 0;
	u32 temp;
	unsigned long flags;

	/* Find out the new setting */
	if (!strncmp("on", buf, count-1) || !strncmp("1", buf, count-1))
		new_setting = 1;
	else if (!strncmp("off", buf, count-1) || !strncmp("0", buf, count-1))
		new_setting = 0;
	else
		return count;

	spin_lock_irqsave(&priv->rxlock, flags);

	/* Set the new stashing value */
	priv->bd_stash_en = new_setting;

	temp = gfar_read(&priv->regs->attr);
	
	if (new_setting)
		temp |= ATTR_BDSTASH;
	else
		temp &= ~(ATTR_BDSTASH);

	gfar_write(&priv->regs->attr, temp);

	spin_unlock_irqrestore(&priv->rxlock, flags);

	return count;
}

static ssize_t gfar_show_rx_stash_size(struct class_device *cdev, char *buf)
{
	struct net_device *dev = to_net_dev(cdev);
	struct gfar_private *priv = netdev_priv(dev);

	return sprintf(buf, "%d\n", priv->rx_stash_size);
}

static ssize_t gfar_set_rx_stash_size(struct class_device *cdev,
		const char *buf, size_t count)
{
	struct net_device *dev = to_net_dev(cdev);
	struct gfar_private *priv = netdev_priv(dev);
	unsigned int length = simple_strtoul(buf, NULL, 0);
	u32 temp;
	unsigned long flags;

	spin_lock_irqsave(&priv->rxlock, flags);
	if (length > priv->rx_buffer_size)
		return count;

	if (length == priv->rx_stash_size)
		return count;

	priv->rx_stash_size = length;

	temp = gfar_read(&priv->regs->attreli);
	temp &= ~ATTRELI_EL_MASK;
	temp |= ATTRELI_EL(length);
	gfar_write(&priv->regs->attreli, temp);

	/* Turn stashing on/off as appropriate */
	temp = gfar_read(&priv->regs->attr);

	if (length)
		temp |= ATTR_BUFSTASH;
	else
		temp &= ~(ATTR_BUFSTASH);

	gfar_write(&priv->regs->attr, temp);

	spin_unlock_irqrestore(&priv->rxlock, flags);

	return count;
}


/* Stashing will only be enabled when rx_stash_size != 0 */
static ssize_t gfar_show_rx_stash_index(struct class_device *cdev, char *buf)
{
	struct net_device *dev = to_net_dev(cdev);
	struct gfar_private *priv = netdev_priv(dev);

	return sprintf(buf, "%d\n", priv->rx_stash_index);
}

static ssize_t gfar_set_rx_stash_index(struct class_device *cdev,
		const char *buf, size_t count)
{
	struct net_device *dev = to_net_dev(cdev);
	struct gfar_private *priv = netdev_priv(dev);
	unsigned short index = simple_strtoul(buf, NULL, 0);
	u32 temp;
	unsigned long flags;

	spin_lock_irqsave(&priv->rxlock, flags);
	if (index > priv->rx_stash_size)
		return count;

	if (index == priv->rx_stash_index)
		return count;

	priv->rx_stash_index = index;

	temp = gfar_read(&priv->regs->attreli);
	temp &= ~ATTRELI_EI_MASK;
	temp |= ATTRELI_EI(index);
	gfar_write(&priv->regs->attreli, flags);

	spin_unlock_irqrestore(&priv->rxlock, flags);

	return count;
}

static ssize_t gfar_show_fifo_threshold(struct class_device *cdev, char *buf)
{
	struct net_device *dev = to_net_dev(cdev);
	struct gfar_private *priv = netdev_priv(dev);

	return sprintf(buf, "%d\n", priv->fifo_threshold);
}

static ssize_t gfar_set_fifo_threshold(struct class_device *cdev,
		const char *buf, size_t count)
{
	struct net_device *dev = to_net_dev(cdev);
	struct gfar_private *priv = netdev_priv(dev);
	unsigned int length = simple_strtoul(buf, NULL, 0);
	u32 temp;
	unsigned long flags;

	if (length > GFAR_MAX_FIFO_THRESHOLD)
		return count;

	spin_lock_irqsave(&priv->txlock, flags);

	priv->fifo_threshold = length;

	temp = gfar_read(&priv->regs->fifo_tx_thr);
	temp &= ~FIFO_TX_THR_MASK;
	temp |= length;
	gfar_write(&priv->regs->fifo_tx_thr, temp);

	spin_unlock_irqrestore(&priv->txlock, flags);

	return count;
}

static ssize_t gfar_show_fifo_starve(struct class_device *cdev, char *buf)
{
	struct net_device *dev = to_net_dev(cdev);
	struct gfar_private *priv = netdev_priv(dev);

	return sprintf(buf, "%d\n", priv->fifo_starve);
}


static ssize_t gfar_set_fifo_starve(struct class_device *cdev,
		const char *buf, size_t count)
{
	struct net_device *dev = to_net_dev(cdev);
	struct gfar_private *priv = netdev_priv(dev);
	unsigned int num = simple_strtoul(buf, NULL, 0);
	u32 temp;
	unsigned long flags;

	if (num > GFAR_MAX_FIFO_STARVE)
		return count;

	spin_lock_irqsave(&priv->txlock, flags);

	priv->fifo_starve = num;

	temp = gfar_read(&priv->regs->fifo_tx_starve);
	temp &= ~FIFO_TX_STARVE_MASK;
	temp |= num;
	gfar_write(&priv->regs->fifo_tx_starve, temp);

	spin_unlock_irqrestore(&priv->txlock, flags);

	return count;
}

static ssize_t gfar_show_fifo_starve_off(struct class_device *cdev, char *buf)
{
	struct net_device *dev = to_net_dev(cdev);
	struct gfar_private *priv = netdev_priv(dev);

	return sprintf(buf, "%d\n", priv->fifo_starve_off);
}

static ssize_t gfar_set_fifo_starve_off(struct class_device *cdev,
		const char *buf, size_t count)
{
	struct net_device *dev = to_net_dev(cdev);
	struct gfar_private *priv = netdev_priv(dev);
	unsigned int num = simple_strtoul(buf, NULL, 0);
	u32 temp;
	unsigned long flags;

	if (num > GFAR_MAX_FIFO_STARVE_OFF)
		return count;

	spin_lock_irqsave(&priv->txlock, flags);

	priv->fifo_starve_off = num;

	temp = gfar_read(&priv->regs->fifo_tx_starve_shutoff);
	temp &= ~FIFO_TX_STARVE_OFF_MASK;
	temp |= num;
	gfar_write(&priv->regs->fifo_tx_starve_shutoff, temp);

	spin_unlock_irqrestore(&priv->txlock, flags);

	return count;
}

void gfar_init_sysfs(struct net_device *dev)
{
	struct gfar_private *priv = netdev_priv(dev);

	/* Initialize the default values */
	priv->rx_stash_size = DEFAULT_STASH_LENGTH;
	priv->rx_stash_index = DEFAULT_STASH_INDEX;
	priv->fifo_threshold = DEFAULT_FIFO_TX_THR;
	priv->fifo_starve = DEFAULT_FIFO_TX_STARVE;
	priv->fifo_starve_off = DEFAULT_FIFO_TX_STARVE_OFF;
	priv->bd_stash_en = DEFAULT_BD_STASH;

	/* Create our sysfs files */
	GFAR_CREATE_FILE(dev, bd_stash);
	GFAR_CREATE_FILE(dev, rx_stash_size);
	GFAR_CREATE_FILE(dev, rx_stash_index);
	GFAR_CREATE_FILE(dev, fifo_threshold);
	GFAR_CREATE_FILE(dev, fifo_starve);
	GFAR_CREATE_FILE(dev, fifo_starve_off);

}
Commit	Line	Data
7f7f5316 AF	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
b56d55b6	10	* Maintainer: Kumar Gala (galak@kernel.crashing.org)
7f7f5316 AF	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
7f7f5316 AF	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
fef6108d	84	spin_lock_irqsave(&priv->rxlock, flags);
7f7f5316 AF	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
fef6108d	98	spin_unlock_irqrestore(&priv->rxlock, flags);
7f7f5316 AF	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
fef6108d	120	spin_lock_irqsave(&priv->rxlock, flags);
7f7f5316 AF	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
fef6108d	144	spin_unlock_irqrestore(&priv->rxlock, flags);
7f7f5316 AF	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
fef6108d	168	spin_lock_irqsave(&priv->rxlock, flags);
7f7f5316 AF	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
fef6108d	182	spin_unlock_irqrestore(&priv->rxlock, flags);
7f7f5316 AF	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
fef6108d	207	spin_lock_irqsave(&priv->txlock, flags);
7f7f5316 AF	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
fef6108d	216	spin_unlock_irqrestore(&priv->txlock, flags);
7f7f5316 AF	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
fef6108d	242	spin_lock_irqsave(&priv->txlock, flags);
7f7f5316 AF	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
fef6108d	251	spin_unlock_irqrestore(&priv->txlock, flags);
7f7f5316 AF	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
fef6108d	276	spin_lock_irqsave(&priv->txlock, flags);
7f7f5316 AF	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
fef6108d	285	spin_unlock_irqrestore(&priv->txlock, flags);
7f7f5316 AF	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	}