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OpenCloudOS-Kernel/drivers/net/gianfar_sysfs.c

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/*
* 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 (kumar.gala@freescale.com)
*
* 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/config.h>
#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->lock, 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->lock, 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->lock, 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->lock, 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->lock, 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->lock, 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->lock, 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->lock, 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->lock, 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->lock, 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->lock, 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->lock, 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);
}
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