/* * drivers/net/ethernet/freescale/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"); }