drivers/net/gianfar_sysfs.c

   1 /*
   2  * drivers/net/gianfar_sysfs.c
   3  *
   4  * Gianfar Ethernet Driver
   5  * This driver is designed for the non-CPM ethernet controllers
   6  * on the 85xx and 83xx family of integrated processors
   7  * Based on 8260_io/fcc_enet.c
   8  *
   9  * Author: Andy Fleming
  10  * Maintainer: Kumar Gala (galak@kernel.crashing.org)
  11  *
  12  * Copyright (c) 2002-2005 Freescale Semiconductor, Inc.
  13  *
  14  * This program is free software; you can redistribute  it and/or modify it
  15  * under  the terms of  the GNU General  Public License as published by the
  16  * Free Software Foundation;  either version 2 of the  License, or (at your
  17  * option) any later version.
  18  *
  19  * Sysfs file creation and management
  20  */
  21
  22 #include <linux/kernel.h>
  23 #include <linux/string.h>
  24 #include <linux/errno.h>
  25 #include <linux/unistd.h>
  26 #include <linux/slab.h>
  27 #include <linux/init.h>
  28 #include <linux/delay.h>
  29 #include <linux/etherdevice.h>
  30 #include <linux/spinlock.h>
  31 #include <linux/mm.h>
  32 #include <linux/device.h>
  33
  34 #include <asm/uaccess.h>
  35 #include <linux/module.h>
  36 #include <linux/version.h>
  37
  38 #include "gianfar.h"
  39
  40 #define GFAR_ATTR(_name) \
  41 static ssize_t gfar_show_##_name(struct class_device *cdev, char *buf); \
  42 static ssize_t gfar_set_##_name(struct class_device *cdev, \
  43                 const char *buf, size_t count); \
  44 static CLASS_DEVICE_ATTR(_name, 0644, gfar_show_##_name, gfar_set_##_name)
  45
  46 #define GFAR_CREATE_FILE(_dev, _name) \
  47         class_device_create_file(&_dev->class_dev, &class_device_attr_##_name)
  48
  49 GFAR_ATTR(bd_stash);
  50 GFAR_ATTR(rx_stash_size);
  51 GFAR_ATTR(rx_stash_index);
  52 GFAR_ATTR(fifo_threshold);
  53 GFAR_ATTR(fifo_starve);
  54 GFAR_ATTR(fifo_starve_off);
  55
  56 #define to_net_dev(cd) container_of(cd, struct net_device, class_dev)
  57
  58 static ssize_t gfar_show_bd_stash(struct class_device *cdev, char *buf)
  59 {
  60         struct net_device *dev = to_net_dev(cdev);
  61         struct gfar_private *priv = netdev_priv(dev);
  62
  63         return sprintf(buf, "%s\n", priv->bd_stash_en? "on" : "off");
  64 }
  65
  66 static ssize_t gfar_set_bd_stash(struct class_device *cdev,
  67                 const char *buf, size_t count)
  68 {
  69         struct net_device *dev = to_net_dev(cdev);
  70         struct gfar_private *priv = netdev_priv(dev);
  71         int new_setting = 0;
  72         u32 temp;
  73         unsigned long flags;
  74
  75         /* Find out the new setting */
  76         if (!strncmp("on", buf, count-1) || !strncmp("1", buf, count-1))
  77                 new_setting = 1;
  78         else if (!strncmp("off", buf, count-1) || !strncmp("0", buf, count-1))
  79                 new_setting = 0;
  80         else
  81                 return count;
  82
  83         spin_lock_irqsave(&priv->rxlock, flags);
  84
  85         /* Set the new stashing value */
  86         priv->bd_stash_en = new_setting;
  87
  88         temp = gfar_read(&priv->regs->attr);
  89
  90         if (new_setting)
  91                 temp |= ATTR_BDSTASH;
  92         else
  93                 temp &= ~(ATTR_BDSTASH);
  94
  95         gfar_write(&priv->regs->attr, temp);
  96
  97         spin_unlock_irqrestore(&priv->rxlock, flags);
  98
  99         return count;
 100 }
 101
 102 static ssize_t gfar_show_rx_stash_size(struct class_device *cdev, char *buf)
 103 {
 104         struct net_device *dev = to_net_dev(cdev);
 105         struct gfar_private *priv = netdev_priv(dev);
 106
 107         return sprintf(buf, "%d\n", priv->rx_stash_size);
 108 }
 109
 110 static ssize_t gfar_set_rx_stash_size(struct class_device *cdev,
 111                 const char *buf, size_t count)
 112 {
 113         struct net_device *dev = to_net_dev(cdev);
 114         struct gfar_private *priv = netdev_priv(dev);
 115         unsigned int length = simple_strtoul(buf, NULL, 0);
 116         u32 temp;
 117         unsigned long flags;
 118
 119         spin_lock_irqsave(&priv->rxlock, flags);
 120         if (length > priv->rx_buffer_size)
 121                 return count;
 122
 123         if (length == priv->rx_stash_size)
 124                 return count;
 125
 126         priv->rx_stash_size = length;
 127
 128         temp = gfar_read(&priv->regs->attreli);
 129         temp &= ~ATTRELI_EL_MASK;
 130         temp |= ATTRELI_EL(length);
 131         gfar_write(&priv->regs->attreli, temp);
 132
 133         /* Turn stashing on/off as appropriate */
 134         temp = gfar_read(&priv->regs->attr);
 135
 136         if (length)
 137                 temp |= ATTR_BUFSTASH;
 138         else
 139                 temp &= ~(ATTR_BUFSTASH);
 140
 141         gfar_write(&priv->regs->attr, temp);
 142
 143         spin_unlock_irqrestore(&priv->rxlock, flags);
 144
 145         return count;
 146 }
 147
 148
 149 /* Stashing will only be enabled when rx_stash_size != 0 */
 150 static ssize_t gfar_show_rx_stash_index(struct class_device *cdev, char *buf)
 151 {
 152         struct net_device *dev = to_net_dev(cdev);
 153         struct gfar_private *priv = netdev_priv(dev);
 154
 155         return sprintf(buf, "%d\n", priv->rx_stash_index);
 156 }
 157
 158 static ssize_t gfar_set_rx_stash_index(struct class_device *cdev,
 159                 const char *buf, size_t count)
 160 {
 161         struct net_device *dev = to_net_dev(cdev);
 162         struct gfar_private *priv = netdev_priv(dev);
 163         unsigned short index = simple_strtoul(buf, NULL, 0);
 164         u32 temp;
 165         unsigned long flags;
 166
 167         spin_lock_irqsave(&priv->rxlock, flags);
 168         if (index > priv->rx_stash_size)
 169                 return count;
 170
 171         if (index == priv->rx_stash_index)
 172                 return count;
 173
 174         priv->rx_stash_index = index;
 175
 176         temp = gfar_read(&priv->regs->attreli);
 177         temp &= ~ATTRELI_EI_MASK;
 178         temp |= ATTRELI_EI(index);
 179         gfar_write(&priv->regs->attreli, flags);
 180
 181         spin_unlock_irqrestore(&priv->rxlock, flags);
 182
 183         return count;
 184 }
 185
 186 static ssize_t gfar_show_fifo_threshold(struct class_device *cdev, char *buf)
 187 {
 188         struct net_device *dev = to_net_dev(cdev);
 189         struct gfar_private *priv = netdev_priv(dev);
 190
 191         return sprintf(buf, "%d\n", priv->fifo_threshold);
 192 }
 193
 194 static ssize_t gfar_set_fifo_threshold(struct class_device *cdev,
 195                 const char *buf, size_t count)
 196 {
 197         struct net_device *dev = to_net_dev(cdev);
 198         struct gfar_private *priv = netdev_priv(dev);
 199         unsigned int length = simple_strtoul(buf, NULL, 0);
 200         u32 temp;
 201         unsigned long flags;
 202
 203         if (length > GFAR_MAX_FIFO_THRESHOLD)
 204                 return count;
 205
 206         spin_lock_irqsave(&priv->txlock, flags);
 207
 208         priv->fifo_threshold = length;
 209
 210         temp = gfar_read(&priv->regs->fifo_tx_thr);
 211         temp &= ~FIFO_TX_THR_MASK;
 212         temp |= length;
 213         gfar_write(&priv->regs->fifo_tx_thr, temp);
 214
 215         spin_unlock_irqrestore(&priv->txlock, flags);
 216
 217         return count;
 218 }
 219
 220 static ssize_t gfar_show_fifo_starve(struct class_device *cdev, char *buf)
 221 {
 222         struct net_device *dev = to_net_dev(cdev);
 223         struct gfar_private *priv = netdev_priv(dev);
 224
 225         return sprintf(buf, "%d\n", priv->fifo_starve);
 226 }
 227
 228
 229 static ssize_t gfar_set_fifo_starve(struct class_device *cdev,
 230                 const char *buf, size_t count)
 231 {
 232         struct net_device *dev = to_net_dev(cdev);
 233         struct gfar_private *priv = netdev_priv(dev);
 234         unsigned int num = simple_strtoul(buf, NULL, 0);
 235         u32 temp;
 236         unsigned long flags;
 237
 238         if (num > GFAR_MAX_FIFO_STARVE)
 239                 return count;
 240
 241         spin_lock_irqsave(&priv->txlock, flags);
 242
 243         priv->fifo_starve = num;
 244
 245         temp = gfar_read(&priv->regs->fifo_tx_starve);
 246         temp &= ~FIFO_TX_STARVE_MASK;
 247         temp |= num;
 248         gfar_write(&priv->regs->fifo_tx_starve, temp);
 249
 250         spin_unlock_irqrestore(&priv->txlock, flags);
 251
 252         return count;
 253 }
 254
 255 static ssize_t gfar_show_fifo_starve_off(struct class_device *cdev, char *buf)
 256 {
 257         struct net_device *dev = to_net_dev(cdev);
 258         struct gfar_private *priv = netdev_priv(dev);
 259
 260         return sprintf(buf, "%d\n", priv->fifo_starve_off);
 261 }
 262
 263 static ssize_t gfar_set_fifo_starve_off(struct class_device *cdev,
 264                 const char *buf, size_t count)
 265 {
 266         struct net_device *dev = to_net_dev(cdev);
 267         struct gfar_private *priv = netdev_priv(dev);
 268         unsigned int num = simple_strtoul(buf, NULL, 0);
 269         u32 temp;
 270         unsigned long flags;
 271
 272         if (num > GFAR_MAX_FIFO_STARVE_OFF)
 273                 return count;
 274
 275         spin_lock_irqsave(&priv->txlock, flags);
 276
 277         priv->fifo_starve_off = num;
 278
 279         temp = gfar_read(&priv->regs->fifo_tx_starve_shutoff);
 280         temp &= ~FIFO_TX_STARVE_OFF_MASK;
 281         temp |= num;
 282         gfar_write(&priv->regs->fifo_tx_starve_shutoff, temp);
 283
 284         spin_unlock_irqrestore(&priv->txlock, flags);
 285
 286         return count;
 287 }
 288
 289 void gfar_init_sysfs(struct net_device *dev)
 290 {
 291         struct gfar_private *priv = netdev_priv(dev);
 292
 293         /* Initialize the default values */
 294         priv->rx_stash_size = DEFAULT_STASH_LENGTH;
 295         priv->rx_stash_index = DEFAULT_STASH_INDEX;
 296         priv->fifo_threshold = DEFAULT_FIFO_TX_THR;
 297         priv->fifo_starve = DEFAULT_FIFO_TX_STARVE;
 298         priv->fifo_starve_off = DEFAULT_FIFO_TX_STARVE_OFF;
 299         priv->bd_stash_en = DEFAULT_BD_STASH;
 300
 301         /* Create our sysfs files */
 302         GFAR_CREATE_FILE(dev, bd_stash);
 303         GFAR_CREATE_FILE(dev, rx_stash_size);
 304         GFAR_CREATE_FILE(dev, rx_stash_index);
 305         GFAR_CREATE_FILE(dev, fifo_threshold);
 306         GFAR_CREATE_FILE(dev, fifo_starve);
 307         GFAR_CREATE_FILE(dev, fifo_starve_off);
 308
 309 }