| /* |
| * 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/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"); |
| } |