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