diff options
Diffstat (limited to 'drivers/net/ethernet/freescale/gianfar_sysfs.c')
| -rw-r--r-- | drivers/net/ethernet/freescale/gianfar_sysfs.c | 341 |
1 files changed, 341 insertions, 0 deletions
diff --git a/drivers/net/ethernet/freescale/gianfar_sysfs.c b/drivers/net/ethernet/freescale/gianfar_sysfs.c new file mode 100644 index 000000000000..64f4094ac7f1 --- /dev/null +++ b/drivers/net/ethernet/freescale/gianfar_sysfs.c @@ -0,0 +1,341 @@ +/* + * 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(®s->attr); + + if (new_setting) + temp |= ATTR_BDSTASH; + else + temp &= ~(ATTR_BDSTASH); + + gfar_write(®s->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(®s->attreli); + temp &= ~ATTRELI_EL_MASK; + temp |= ATTRELI_EL(length); + gfar_write(®s->attreli, temp); + + /* Turn stashing on/off as appropriate */ + temp = gfar_read(®s->attr); + + if (length) + temp |= ATTR_BUFSTASH; + else + temp &= ~(ATTR_BUFSTASH); + + gfar_write(®s->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(®s->attreli); + temp &= ~ATTRELI_EI_MASK; + temp |= ATTRELI_EI(index); + gfar_write(®s->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(®s->fifo_tx_thr); + temp &= ~FIFO_TX_THR_MASK; + temp |= length; + gfar_write(®s->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(®s->fifo_tx_starve); + temp &= ~FIFO_TX_STARVE_MASK; + temp |= num; + gfar_write(®s->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(®s->fifo_tx_starve_shutoff); + temp &= ~FIFO_TX_STARVE_OFF_MASK; + temp |= num; + gfar_write(®s->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"); +} |