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/sched.h>
  24 #include <linux/string.h>
  25 #include <linux/errno.h>
  26 #include <linux/unistd.h>
  27 #include <linux/slab.h>
  28 #include <linux/init.h>
  29 #include <linux/delay.h>
  30 #include <linux/etherdevice.h>
  31 #include <linux/spinlock.h>
  32 #include <linux/mm.h>
  33 #include <linux/device.h>
  34
  35 #include <asm/uaccess.h>
  36 #include <linux/module.h>
  37 #include <linux/version.h>
  38
  39 #include "gianfar.h"
  40
  41 #define GFAR_ATTR(_name) \
  42 static ssize_t gfar_show_##_name(struct device *dev, \
  43          struct device_attribute *attr, char *buf); \
  44 static ssize_t gfar_set_##_name(struct device *dev, \
  45                 struct device_attribute *attr, \
  46                 const char *buf, size_t count); \
  47 static DEVICE_ATTR(_name, 0644, gfar_show_##_name, gfar_set_##_name)
  48
  49 #define GFAR_CREATE_FILE(_dev, _name) \
  50         device_create_file(&_dev->dev, &dev_attr_##_name)
  51
  52 GFAR_ATTR(bd_stash);
  53 GFAR_ATTR(rx_stash_size);
  54 GFAR_ATTR(rx_stash_index);
  55 GFAR_ATTR(fifo_threshold);
  56 GFAR_ATTR(fifo_starve);
  57 GFAR_ATTR(fifo_starve_off);
  58
  59 static ssize_t gfar_show_bd_stash(struct device *dev,
  60                                   struct device_attribute *attr, char *buf)
  61 {
  62         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
  63
  64         return sprintf(buf, "%s\n", priv->bd_stash_en ? "on" : "off");
  65 }
  66
  67 static ssize_t gfar_set_bd_stash(struct device *dev,
  68                                  struct device_attribute *attr,
  69                                  const char *buf, size_t count)
  70 {
  71         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
  72         int new_setting = 0;
  73         u32 temp;
  74         unsigned long flags;
  75
  76         /* Find out the new setting */
  77         if (!strncmp("on", buf, count - 1) || !strncmp("1", buf, count - 1))
  78                 new_setting = 1;
  79         else if (!strncmp("off", buf, count - 1)
  80                  || !strncmp("0", buf, count - 1))
  81                 new_setting = 0;
  82         else
  83                 return count;
  84
  85         spin_lock_irqsave(&priv->rxlock, flags);
  86
  87         /* Set the new stashing value */
  88         priv->bd_stash_en = new_setting;
  89
  90         temp = gfar_read(&priv->regs->attr);
  91
  92         if (new_setting)
  93                 temp |= ATTR_BDSTASH;
  94         else
  95                 temp &= ~(ATTR_BDSTASH);
  96
  97         gfar_write(&priv->regs->attr, temp);
  98
  99         spin_unlock_irqrestore(&priv->rxlock, flags);
 100
 101         return count;
 102 }
 103
 104 static ssize_t gfar_show_rx_stash_size(struct device *dev,
 105                                        struct device_attribute *attr, char *buf)
 106 {
 107         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 108
 109         return sprintf(buf, "%d\n", priv->rx_stash_size);
 110 }
 111
 112 static ssize_t gfar_set_rx_stash_size(struct device *dev,
 113                                       struct device_attribute *attr,
 114                                       const char *buf, size_t count)
 115 {
 116         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 117         unsigned int length = simple_strtoul(buf, NULL, 0);
 118         u32 temp;
 119         unsigned long flags;
 120
 121         spin_lock_irqsave(&priv->rxlock, flags);
 122         if (length > priv->rx_buffer_size)
 123                 return count;
 124
 125         if (length == priv->rx_stash_size)
 126                 return count;
 127
 128         priv->rx_stash_size = length;
 129
 130         temp = gfar_read(&priv->regs->attreli);
 131         temp &= ~ATTRELI_EL_MASK;
 132         temp |= ATTRELI_EL(length);
 133         gfar_write(&priv->regs->attreli, temp);
 134
 135         /* Turn stashing on/off as appropriate */
 136         temp = gfar_read(&priv->regs->attr);
 137
 138         if (length)
 139                 temp |= ATTR_BUFSTASH;
 140         else
 141                 temp &= ~(ATTR_BUFSTASH);
 142
 143         gfar_write(&priv->regs->attr, temp);
 144
 145         spin_unlock_irqrestore(&priv->rxlock, flags);
 146
 147         return count;
 148 }
 149
 150 /* Stashing will only be enabled when rx_stash_size != 0 */
 151 static ssize_t gfar_show_rx_stash_index(struct device *dev,
 152                                         struct device_attribute *attr,
 153                                         char *buf)
 154 {
 155         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 156
 157         return sprintf(buf, "%d\n", priv->rx_stash_index);
 158 }
 159
 160 static ssize_t gfar_set_rx_stash_index(struct device *dev,
 161                                        struct device_attribute *attr,
 162                                        const char *buf, size_t count)
 163 {
 164         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 165         unsigned short index = simple_strtoul(buf, NULL, 0);
 166         u32 temp;
 167         unsigned long flags;
 168
 169         spin_lock_irqsave(&priv->rxlock, flags);
 170         if (index > priv->rx_stash_size)
 171                 return count;
 172
 173         if (index == priv->rx_stash_index)
 174                 return count;
 175
 176         priv->rx_stash_index = index;
 177
 178         temp = gfar_read(&priv->regs->attreli);
 179         temp &= ~ATTRELI_EI_MASK;
 180         temp |= ATTRELI_EI(index);
 181         gfar_write(&priv->regs->attreli, flags);
 182
 183         spin_unlock_irqrestore(&priv->rxlock, flags);
 184
 185         return count;
 186 }
 187
 188 static ssize_t gfar_show_fifo_threshold(struct device *dev,
 189                                         struct device_attribute *attr,
 190                                         char *buf)
 191 {
 192         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 193
 194         return sprintf(buf, "%d\n", priv->fifo_threshold);
 195 }
 196
 197 static ssize_t gfar_set_fifo_threshold(struct device *dev,
 198                                        struct device_attribute *attr,
 199                                        const char *buf, size_t count)
 200 {
 201         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 202         unsigned int length = simple_strtoul(buf, NULL, 0);
 203         u32 temp;
 204         unsigned long flags;
 205
 206         if (length > GFAR_MAX_FIFO_THRESHOLD)
 207                 return count;
 208
 209         spin_lock_irqsave(&priv->txlock, flags);
 210
 211         priv->fifo_threshold = length;
 212
 213         temp = gfar_read(&priv->regs->fifo_tx_thr);
 214         temp &= ~FIFO_TX_THR_MASK;
 215         temp |= length;
 216         gfar_write(&priv->regs->fifo_tx_thr, temp);
 217
 218         spin_unlock_irqrestore(&priv->txlock, flags);
 219
 220         return count;
 221 }
 222
 223 static ssize_t gfar_show_fifo_starve(struct device *dev,
 224                                      struct device_attribute *attr, char *buf)
 225 {
 226         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 227
 228         return sprintf(buf, "%d\n", priv->fifo_starve);
 229 }
 230
 231 static ssize_t gfar_set_fifo_starve(struct device *dev,
 232                                     struct device_attribute *attr,
 233                                     const char *buf, size_t count)
 234 {
 235         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 236         unsigned int num = simple_strtoul(buf, NULL, 0);
 237         u32 temp;
 238         unsigned long flags;
 239
 240         if (num > GFAR_MAX_FIFO_STARVE)
 241                 return count;
 242
 243         spin_lock_irqsave(&priv->txlock, flags);
 244
 245         priv->fifo_starve = num;
 246
 247         temp = gfar_read(&priv->regs->fifo_tx_starve);
 248         temp &= ~FIFO_TX_STARVE_MASK;
 249         temp |= num;
 250         gfar_write(&priv->regs->fifo_tx_starve, temp);
 251
 252         spin_unlock_irqrestore(&priv->txlock, flags);
 253
 254         return count;
 255 }
 256
 257 static ssize_t gfar_show_fifo_starve_off(struct device *dev,
 258                                          struct device_attribute *attr,
 259                                          char *buf)
 260 {
 261         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 262
 263         return sprintf(buf, "%d\n", priv->fifo_starve_off);
 264 }
 265
 266 static ssize_t gfar_set_fifo_starve_off(struct device *dev,
 267                                         struct device_attribute *attr,
 268                                         const char *buf, size_t count)
 269 {
 270         struct gfar_private *priv = netdev_priv(to_net_dev(dev));
 271         unsigned int num = simple_strtoul(buf, NULL, 0);
 272         u32 temp;
 273         unsigned long flags;
 274
 275         if (num > GFAR_MAX_FIFO_STARVE_OFF)
 276                 return count;
 277
 278         spin_lock_irqsave(&priv->txlock, flags);
 279
 280         priv->fifo_starve_off = num;
 281
 282         temp = gfar_read(&priv->regs->fifo_tx_starve_shutoff);
 283         temp &= ~FIFO_TX_STARVE_OFF_MASK;
 284         temp |= num;
 285         gfar_write(&priv->regs->fifo_tx_starve_shutoff, temp);
 286
 287         spin_unlock_irqrestore(&priv->txlock, flags);
 288
 289         return count;
 290 }
 291
 292 void gfar_init_sysfs(struct net_device *dev)
 293 {
 294         struct gfar_private *priv = netdev_priv(dev);
 295
 296         /* Initialize the default values */
 297         priv->rx_stash_size = DEFAULT_STASH_LENGTH;
 298         priv->rx_stash_index = DEFAULT_STASH_INDEX;
 299         priv->fifo_threshold = DEFAULT_FIFO_TX_THR;
 300         priv->fifo_starve = DEFAULT_FIFO_TX_STARVE;
 301         priv->fifo_starve_off = DEFAULT_FIFO_TX_STARVE_OFF;
 302         priv->bd_stash_en = DEFAULT_BD_STASH;
 303
 304         /* Create our sysfs files */
 305         GFAR_CREATE_FILE(dev, bd_stash);
 306         GFAR_CREATE_FILE(dev, rx_stash_size);
 307         GFAR_CREATE_FILE(dev, rx_stash_index);
 308         GFAR_CREATE_FILE(dev, fifo_threshold);
 309         GFAR_CREATE_FILE(dev, fifo_starve);
 310         GFAR_CREATE_FILE(dev, fifo_starve_off);
 311
 312 }