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path: root/drivers/net/ethernet/freescale/gianfar_sysfs.c
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Diffstat (limited to 'drivers/net/ethernet/freescale/gianfar_sysfs.c')
-rw-r--r--drivers/net/ethernet/freescale/gianfar_sysfs.c341
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 00000000000..64f4094ac7f
--- /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(&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");
+}