drivers/net/gianfar_sysfs.c - kernel/skids - Git at Google

 /*
  * 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)
  * Modifier: Sandeep Gopalpet <sandeep.kumar@freescale.com>
  *
  * Copyright 2002-2009 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/string.h>
 #include <linux/errno.h>
 #include <linux/unistd.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 "gianfar.h"

 static ssize_t gfar_show_bd_stash(struct device *dev,
 				  struct device_attribute *attr, char *buf)
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));

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

 static ssize_t gfar_set_bd_stash(struct device *dev,
 				 struct device_attribute *attr,
 				 const char *buf, size_t count)
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	int new_setting = 0;
 	u32 temp;
 	unsigned long flags;

 	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BD_STASHING))
 		return count;


 	/* 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;


 	local_irq_save(flags);
 	lock_rx_qs(priv);

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

 	temp = gfar_read(&regs->attr);

 	if (new_setting)
 		temp |= ATTR_BDSTASH;
 	else
 		temp &= ~(ATTR_BDSTASH);

 	gfar_write(&regs->attr, temp);

 	unlock_rx_qs(priv);
 	local_irq_restore(flags);

 	return count;
 }

 static DEVICE_ATTR(bd_stash, 0644, gfar_show_bd_stash, gfar_set_bd_stash);

 static ssize_t gfar_show_rx_stash_size(struct device *dev,
 				       struct device_attribute *attr, char *buf)
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));

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

 static ssize_t gfar_set_rx_stash_size(struct device *dev,
 				      struct device_attribute *attr,
 				      const char *buf, size_t count)
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	unsigned int length = simple_strtoul(buf, NULL, 0);
 	u32 temp;
 	unsigned long flags;

 	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BUF_STASHING))
 		return count;

 	local_irq_save(flags);
 	lock_rx_qs(priv);

 	if (length > priv->rx_buffer_size)
 		goto out;

 	if (length == priv->rx_stash_size)
 		goto out;

 	priv->rx_stash_size = length;

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

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

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

 	gfar_write(&regs->attr, temp);

 out:
 	unlock_rx_qs(priv);
 	local_irq_restore(flags);

 	return count;
 }

 static DEVICE_ATTR(rx_stash_size, 0644, gfar_show_rx_stash_size,
 		   gfar_set_rx_stash_size);

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

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

 static ssize_t gfar_set_rx_stash_index(struct device *dev,
 				       struct device_attribute *attr,
 				       const char *buf, size_t count)
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	unsigned short index = simple_strtoul(buf, NULL, 0);
 	u32 temp;
 	unsigned long flags;

 	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BUF_STASHING))
 		return count;

 	local_irq_save(flags);
 	lock_rx_qs(priv);

 	if (index > priv->rx_stash_size)
 		goto out;

 	if (index == priv->rx_stash_index)
 		goto out;

 	priv->rx_stash_index = index;

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

 out:
 	unlock_rx_qs(priv);
 	local_irq_restore(flags);

 	return count;
 }

 static DEVICE_ATTR(rx_stash_index, 0644, gfar_show_rx_stash_index,
 		   gfar_set_rx_stash_index);

 static ssize_t gfar_show_fifo_threshold(struct device *dev,
 					struct device_attribute *attr,
 					char *buf)
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));

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

 static ssize_t gfar_set_fifo_threshold(struct device *dev,
 				       struct device_attribute *attr,
 				       const char *buf, size_t count)
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	unsigned int length = simple_strtoul(buf, NULL, 0);
 	u32 temp;
 	unsigned long flags;

 	if (length > GFAR_MAX_FIFO_THRESHOLD)
 		return count;

 	local_irq_save(flags);
 	lock_tx_qs(priv);

 	priv->fifo_threshold = length;

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

 	unlock_tx_qs(priv);
 	local_irq_restore(flags);

 	return count;
 }

 static DEVICE_ATTR(fifo_threshold, 0644, gfar_show_fifo_threshold,
 		   gfar_set_fifo_threshold);

 static ssize_t gfar_show_fifo_starve(struct device *dev,
 				     struct device_attribute *attr, char *buf)
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));

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

 static ssize_t gfar_set_fifo_starve(struct device *dev,
 				    struct device_attribute *attr,
 				    const char *buf, size_t count)
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	unsigned int num = simple_strtoul(buf, NULL, 0);
 	u32 temp;
 	unsigned long flags;

 	if (num > GFAR_MAX_FIFO_STARVE)
 		return count;

 	local_irq_save(flags);
 	lock_tx_qs(priv);

 	priv->fifo_starve = num;

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

 	unlock_tx_qs(priv);
 	local_irq_restore(flags);

 	return count;
 }

 static DEVICE_ATTR(fifo_starve, 0644, gfar_show_fifo_starve,
 		   gfar_set_fifo_starve);

 static ssize_t gfar_show_fifo_starve_off(struct device *dev,
 					 struct device_attribute *attr,
 					 char *buf)
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));

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

 static ssize_t gfar_set_fifo_starve_off(struct device *dev,
 					struct device_attribute *attr,
 					const char *buf, size_t count)
 {
 	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 	struct gfar __iomem *regs = priv->gfargrp[0].regs;
 	unsigned int num = simple_strtoul(buf, NULL, 0);
 	u32 temp;
 	unsigned long flags;

 	if (num > GFAR_MAX_FIFO_STARVE_OFF)
 		return count;

 	local_irq_save(flags);
 	lock_tx_qs(priv);

 	priv->fifo_starve_off = num;

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

 	unlock_tx_qs(priv);
 	local_irq_restore(flags);

 	return count;
 }

 static DEVICE_ATTR(fifo_starve_off, 0644, gfar_show_fifo_starve_off,
 		   gfar_set_fifo_starve_off);

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

 	/* Initialize the default values */
 	priv->fifo_threshold = DEFAULT_FIFO_TX_THR;
 	priv->fifo_starve = DEFAULT_FIFO_TX_STARVE;
 	priv->fifo_starve_off = DEFAULT_FIFO_TX_STARVE_OFF;

 	/* Create our sysfs files */
 	rc = device_create_file(&dev->dev, &dev_attr_bd_stash);
 	rc |= device_create_file(&dev->dev, &dev_attr_rx_stash_size);
 	rc |= device_create_file(&dev->dev, &dev_attr_rx_stash_index);
 	rc |= device_create_file(&dev->dev, &dev_attr_fifo_threshold);
 	rc |= device_create_file(&dev->dev, &dev_attr_fifo_starve);
 	rc |= device_create_file(&dev->dev, &dev_attr_fifo_starve_off);
 	if (rc)
 		dev_err(&dev->dev, "Error creating gianfar sysfs files.\n");
 }
	/*
	* 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)
	* Modifier: Sandeep Gopalpet <sandeep.kumar@freescale.com>
	*
	* Copyright 2002-2009 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/string.h>
	#include <linux/errno.h>
	#include <linux/unistd.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 "gianfar.h"

	static ssize_t gfar_show_bd_stash(struct device *dev,
	struct device_attribute attr, char buf)
	{
	struct gfar_private *priv = netdev_priv(to_net_dev(dev));

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

	static ssize_t gfar_set_bd_stash(struct device *dev,
	struct device_attribute *attr,
	const char *buf, size_t count)
	{
	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
	struct gfar __iomem *regs = priv->gfargrp[0].regs;
	int new_setting = 0;
	u32 temp;
	unsigned long flags;

	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BD_STASHING))
	return count;


	/* 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;


	local_irq_save(flags);
	lock_rx_qs(priv);

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

	temp = gfar_read(&regs->attr);

	if (new_setting)
	temp \|= ATTR_BDSTASH;
	else
	temp &= ~(ATTR_BDSTASH);

	gfar_write(&regs->attr, temp);

	unlock_rx_qs(priv);
	local_irq_restore(flags);

	return count;
	}

	static DEVICE_ATTR(bd_stash, 0644, gfar_show_bd_stash, gfar_set_bd_stash);

	static ssize_t gfar_show_rx_stash_size(struct device *dev,
	struct device_attribute attr, char buf)
	{
	struct gfar_private *priv = netdev_priv(to_net_dev(dev));

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

	static ssize_t gfar_set_rx_stash_size(struct device *dev,
	struct device_attribute *attr,
	const char *buf, size_t count)
	{
	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
	struct gfar __iomem *regs = priv->gfargrp[0].regs;
	unsigned int length = simple_strtoul(buf, NULL, 0);
	u32 temp;
	unsigned long flags;

	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BUF_STASHING))
	return count;

	local_irq_save(flags);
	lock_rx_qs(priv);

	if (length > priv->rx_buffer_size)
	goto out;

	if (length == priv->rx_stash_size)
	goto out;

	priv->rx_stash_size = length;

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

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

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

	gfar_write(&regs->attr, temp);

	out:
	unlock_rx_qs(priv);
	local_irq_restore(flags);

	return count;
	}

	static DEVICE_ATTR(rx_stash_size, 0644, gfar_show_rx_stash_size,
	gfar_set_rx_stash_size);

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

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

	static ssize_t gfar_set_rx_stash_index(struct device *dev,
	struct device_attribute *attr,
	const char *buf, size_t count)
	{
	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
	struct gfar __iomem *regs = priv->gfargrp[0].regs;
	unsigned short index = simple_strtoul(buf, NULL, 0);
	u32 temp;
	unsigned long flags;

	if (!(priv->device_flags & FSL_GIANFAR_DEV_HAS_BUF_STASHING))
	return count;

	local_irq_save(flags);
	lock_rx_qs(priv);

	if (index > priv->rx_stash_size)
	goto out;

	if (index == priv->rx_stash_index)
	goto out;

	priv->rx_stash_index = index;

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

	out:
	unlock_rx_qs(priv);
	local_irq_restore(flags);

	return count;
	}

	static DEVICE_ATTR(rx_stash_index, 0644, gfar_show_rx_stash_index,
	gfar_set_rx_stash_index);

	static ssize_t gfar_show_fifo_threshold(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	struct gfar_private *priv = netdev_priv(to_net_dev(dev));

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

	static ssize_t gfar_set_fifo_threshold(struct device *dev,
	struct device_attribute *attr,
	const char *buf, size_t count)
	{
	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
	struct gfar __iomem *regs = priv->gfargrp[0].regs;
	unsigned int length = simple_strtoul(buf, NULL, 0);
	u32 temp;
	unsigned long flags;

	if (length > GFAR_MAX_FIFO_THRESHOLD)
	return count;

	local_irq_save(flags);
	lock_tx_qs(priv);

	priv->fifo_threshold = length;

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

	unlock_tx_qs(priv);
	local_irq_restore(flags);

	return count;
	}

	static DEVICE_ATTR(fifo_threshold, 0644, gfar_show_fifo_threshold,
	gfar_set_fifo_threshold);

	static ssize_t gfar_show_fifo_starve(struct device *dev,
	struct device_attribute attr, char buf)
	{
	struct gfar_private *priv = netdev_priv(to_net_dev(dev));

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

	static ssize_t gfar_set_fifo_starve(struct device *dev,
	struct device_attribute *attr,
	const char *buf, size_t count)
	{
	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
	struct gfar __iomem *regs = priv->gfargrp[0].regs;
	unsigned int num = simple_strtoul(buf, NULL, 0);
	u32 temp;
	unsigned long flags;

	if (num > GFAR_MAX_FIFO_STARVE)
	return count;

	local_irq_save(flags);
	lock_tx_qs(priv);

	priv->fifo_starve = num;

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

	unlock_tx_qs(priv);
	local_irq_restore(flags);

	return count;
	}

	static DEVICE_ATTR(fifo_starve, 0644, gfar_show_fifo_starve,
	gfar_set_fifo_starve);

	static ssize_t gfar_show_fifo_starve_off(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	struct gfar_private *priv = netdev_priv(to_net_dev(dev));

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

	static ssize_t gfar_set_fifo_starve_off(struct device *dev,
	struct device_attribute *attr,
	const char *buf, size_t count)
	{
	struct gfar_private *priv = netdev_priv(to_net_dev(dev));
	struct gfar __iomem *regs = priv->gfargrp[0].regs;
	unsigned int num = simple_strtoul(buf, NULL, 0);
	u32 temp;
	unsigned long flags;

	if (num > GFAR_MAX_FIFO_STARVE_OFF)
	return count;

	local_irq_save(flags);
	lock_tx_qs(priv);

	priv->fifo_starve_off = num;

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

	unlock_tx_qs(priv);
	local_irq_restore(flags);

	return count;
	}

	static DEVICE_ATTR(fifo_starve_off, 0644, gfar_show_fifo_starve_off,
	gfar_set_fifo_starve_off);

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

	/* Initialize the default values */
	priv->fifo_threshold = DEFAULT_FIFO_TX_THR;
	priv->fifo_starve = DEFAULT_FIFO_TX_STARVE;
	priv->fifo_starve_off = DEFAULT_FIFO_TX_STARVE_OFF;

	/* Create our sysfs files */
	rc = device_create_file(&dev->dev, &dev_attr_bd_stash);
	rc \|= device_create_file(&dev->dev, &dev_attr_rx_stash_size);
	rc \|= device_create_file(&dev->dev, &dev_attr_rx_stash_index);
	rc \|= device_create_file(&dev->dev, &dev_attr_fifo_threshold);
	rc \|= device_create_file(&dev->dev, &dev_attr_fifo_starve);
	rc \|= device_create_file(&dev->dev, &dev_attr_fifo_starve_off);
	if (rc)
	dev_err(&dev->dev, "Error creating gianfar sysfs files.\n");
	}