From 7f7f53168dbee6d6a462acea666fddd18aad4f08 Mon Sep 17 00:00:00 2001 From: Andy Fleming Date: Fri, 11 Nov 2005 12:38:59 -0600 Subject: [PATCH] Gianfar update and sysfs support This seems to have gotten lost, so I'll resend. Signed-off-by: Andy Fleming * Added sysfs support to gianfar for modifying FIFO and stashing parameters * Updated driver to support 10 Mbit, full duplex operation * Improved comments throughout * Cleaned up and optimized offloading code * Fixed a bug where rx buffers were being improperly mapped and unmapped * (only manifested if cache-coherency was off) * Added support for using the eTSEC exact-match MAC registers * Bumped the version to 1.3 * Added support for distinguishing between reduced 100 and 10 Mbit modes * Modified default coalescing values to lower latency * Added documentation Signed-off-by: Jeff Garzik --- drivers/net/gianfar_sysfs.c | 311 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 311 insertions(+) create mode 100644 drivers/net/gianfar_sysfs.c (limited to 'drivers/net/gianfar_sysfs.c') diff --git a/drivers/net/gianfar_sysfs.c b/drivers/net/gianfar_sysfs.c new file mode 100644 index 000000000000..10d34cb19192 --- /dev/null +++ b/drivers/net/gianfar_sysfs.c @@ -0,0 +1,311 @@ +/* + * 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 (kumar.gala@freescale.com) + * + * Copyright (c) 2002-2005 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include "gianfar.h" + +#define GFAR_ATTR(_name) \ +static ssize_t gfar_show_##_name(struct class_device *cdev, char *buf); \ +static ssize_t gfar_set_##_name(struct class_device *cdev, \ + const char *buf, size_t count); \ +static CLASS_DEVICE_ATTR(_name, 0644, gfar_show_##_name, gfar_set_##_name) + +#define GFAR_CREATE_FILE(_dev, _name) \ + class_device_create_file(&_dev->class_dev, &class_device_attr_##_name) + +GFAR_ATTR(bd_stash); +GFAR_ATTR(rx_stash_size); +GFAR_ATTR(rx_stash_index); +GFAR_ATTR(fifo_threshold); +GFAR_ATTR(fifo_starve); +GFAR_ATTR(fifo_starve_off); + +#define to_net_dev(cd) container_of(cd, struct net_device, class_dev) + +static ssize_t gfar_show_bd_stash(struct class_device *cdev, char *buf) +{ + struct net_device *dev = to_net_dev(cdev); + struct gfar_private *priv = netdev_priv(dev); + + return sprintf(buf, "%s\n", priv->bd_stash_en? "on" : "off"); +} + +static ssize_t gfar_set_bd_stash(struct class_device *cdev, + const char *buf, size_t count) +{ + struct net_device *dev = to_net_dev(cdev); + struct gfar_private *priv = netdev_priv(dev); + int new_setting = 0; + u32 temp; + unsigned long flags; + + /* 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; + + spin_lock_irqsave(&priv->lock, flags); + + /* Set the new stashing value */ + priv->bd_stash_en = new_setting; + + temp = gfar_read(&priv->regs->attr); + + if (new_setting) + temp |= ATTR_BDSTASH; + else + temp &= ~(ATTR_BDSTASH); + + gfar_write(&priv->regs->attr, temp); + + spin_unlock_irqrestore(&priv->lock, flags); + + return count; +} + +static ssize_t gfar_show_rx_stash_size(struct class_device *cdev, char *buf) +{ + struct net_device *dev = to_net_dev(cdev); + struct gfar_private *priv = netdev_priv(dev); + + return sprintf(buf, "%d\n", priv->rx_stash_size); +} + +static ssize_t gfar_set_rx_stash_size(struct class_device *cdev, + const char *buf, size_t count) +{ + struct net_device *dev = to_net_dev(cdev); + struct gfar_private *priv = netdev_priv(dev); + unsigned int length = simple_strtoul(buf, NULL, 0); + u32 temp; + unsigned long flags; + + spin_lock_irqsave(&priv->lock, flags); + if (length > priv->rx_buffer_size) + return count; + + if (length == priv->rx_stash_size) + return count; + + priv->rx_stash_size = length; + + temp = gfar_read(&priv->regs->attreli); + temp &= ~ATTRELI_EL_MASK; + temp |= ATTRELI_EL(length); + gfar_write(&priv->regs->attreli, temp); + + /* Turn stashing on/off as appropriate */ + temp = gfar_read(&priv->regs->attr); + + if (length) + temp |= ATTR_BUFSTASH; + else + temp &= ~(ATTR_BUFSTASH); + + gfar_write(&priv->regs->attr, temp); + + spin_unlock_irqrestore(&priv->lock, flags); + + return count; +} + + +/* Stashing will only be enabled when rx_stash_size != 0 */ +static ssize_t gfar_show_rx_stash_index(struct class_device *cdev, char *buf) +{ + struct net_device *dev = to_net_dev(cdev); + struct gfar_private *priv = netdev_priv(dev); + + return sprintf(buf, "%d\n", priv->rx_stash_index); +} + +static ssize_t gfar_set_rx_stash_index(struct class_device *cdev, + const char *buf, size_t count) +{ + struct net_device *dev = to_net_dev(cdev); + struct gfar_private *priv = netdev_priv(dev); + unsigned short index = simple_strtoul(buf, NULL, 0); + u32 temp; + unsigned long flags; + + spin_lock_irqsave(&priv->lock, flags); + if (index > priv->rx_stash_size) + return count; + + if (index == priv->rx_stash_index) + return count; + + priv->rx_stash_index = index; + + temp = gfar_read(&priv->regs->attreli); + temp &= ~ATTRELI_EI_MASK; + temp |= ATTRELI_EI(index); + gfar_write(&priv->regs->attreli, flags); + + spin_unlock_irqrestore(&priv->lock, flags); + + return count; +} + +static ssize_t gfar_show_fifo_threshold(struct class_device *cdev, char *buf) +{ + struct net_device *dev = to_net_dev(cdev); + struct gfar_private *priv = netdev_priv(dev); + + return sprintf(buf, "%d\n", priv->fifo_threshold); +} + +static ssize_t gfar_set_fifo_threshold(struct class_device *cdev, + const char *buf, size_t count) +{ + struct net_device *dev = to_net_dev(cdev); + struct gfar_private *priv = netdev_priv(dev); + unsigned int length = simple_strtoul(buf, NULL, 0); + u32 temp; + unsigned long flags; + + if (length > GFAR_MAX_FIFO_THRESHOLD) + return count; + + spin_lock_irqsave(&priv->lock, flags); + + priv->fifo_threshold = length; + + temp = gfar_read(&priv->regs->fifo_tx_thr); + temp &= ~FIFO_TX_THR_MASK; + temp |= length; + gfar_write(&priv->regs->fifo_tx_thr, temp); + + spin_unlock_irqrestore(&priv->lock, flags); + + return count; +} + +static ssize_t gfar_show_fifo_starve(struct class_device *cdev, char *buf) +{ + struct net_device *dev = to_net_dev(cdev); + struct gfar_private *priv = netdev_priv(dev); + + return sprintf(buf, "%d\n", priv->fifo_starve); +} + + +static ssize_t gfar_set_fifo_starve(struct class_device *cdev, + const char *buf, size_t count) +{ + struct net_device *dev = to_net_dev(cdev); + struct gfar_private *priv = netdev_priv(dev); + unsigned int num = simple_strtoul(buf, NULL, 0); + u32 temp; + unsigned long flags; + + if (num > GFAR_MAX_FIFO_STARVE) + return count; + + spin_lock_irqsave(&priv->lock, flags); + + priv->fifo_starve = num; + + temp = gfar_read(&priv->regs->fifo_tx_starve); + temp &= ~FIFO_TX_STARVE_MASK; + temp |= num; + gfar_write(&priv->regs->fifo_tx_starve, temp); + + spin_unlock_irqrestore(&priv->lock, flags); + + return count; +} + +static ssize_t gfar_show_fifo_starve_off(struct class_device *cdev, char *buf) +{ + struct net_device *dev = to_net_dev(cdev); + struct gfar_private *priv = netdev_priv(dev); + + return sprintf(buf, "%d\n", priv->fifo_starve_off); +} + +static ssize_t gfar_set_fifo_starve_off(struct class_device *cdev, + const char *buf, size_t count) +{ + struct net_device *dev = to_net_dev(cdev); + struct gfar_private *priv = netdev_priv(dev); + unsigned int num = simple_strtoul(buf, NULL, 0); + u32 temp; + unsigned long flags; + + if (num > GFAR_MAX_FIFO_STARVE_OFF) + return count; + + spin_lock_irqsave(&priv->lock, flags); + + priv->fifo_starve_off = num; + + temp = gfar_read(&priv->regs->fifo_tx_starve_shutoff); + temp &= ~FIFO_TX_STARVE_OFF_MASK; + temp |= num; + gfar_write(&priv->regs->fifo_tx_starve_shutoff, temp); + + spin_unlock_irqrestore(&priv->lock, flags); + + return count; +} + +void gfar_init_sysfs(struct net_device *dev) +{ + struct gfar_private *priv = netdev_priv(dev); + + /* Initialize the default values */ + priv->rx_stash_size = DEFAULT_STASH_LENGTH; + priv->rx_stash_index = DEFAULT_STASH_INDEX; + priv->fifo_threshold = DEFAULT_FIFO_TX_THR; + priv->fifo_starve = DEFAULT_FIFO_TX_STARVE; + priv->fifo_starve_off = DEFAULT_FIFO_TX_STARVE_OFF; + priv->bd_stash_en = DEFAULT_BD_STASH; + + /* Create our sysfs files */ + GFAR_CREATE_FILE(dev, bd_stash); + GFAR_CREATE_FILE(dev, rx_stash_size); + GFAR_CREATE_FILE(dev, rx_stash_index); + GFAR_CREATE_FILE(dev, fifo_threshold); + GFAR_CREATE_FILE(dev, fifo_starve); + GFAR_CREATE_FILE(dev, fifo_starve_off); + +} -- cgit v1.2.2