linux/drivers/net/gianfar_sysfs.c
Sandeep Gopalpet 46ceb60ca8 gianfar: Add Multiple group Support
This patch introduces multiple group support for etsec2.0
devices.

Multiple group support is provided by mapping the set of enabled
queues to different groups and then programming the per group
regsiters imask, ievent, rstat, tstat.

The queues corresponding to a group are indicated by programming
isrg (interrupt steering) registers.

Signed-off-by: Sandeep Gopalpet <Sandeep.Kumar@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-02 23:40:59 -08:00

343 lines
8.3 KiB
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)
* 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/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 "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, flags);
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");
}