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