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 class_device *cdev, char *buf); \
  43 static ssize_t gfar_set_##_name(struct class_device *cdev, \
  44                 const char *buf, size_t count); \
  45 static CLASS_DEVICE_ATTR(_name, 0644, gfar_show_##_name, gfar_set_##_name)
  46
  47 #define GFAR_CREATE_FILE(_dev, _name) \
  48         class_device_create_file(&_dev->class_dev, &class_device_attr_##_name)
  49
  50 GFAR_ATTR(bd_stash);
  51 GFAR_ATTR(rx_stash_size);
  52 GFAR_ATTR(rx_stash_index);
  53 GFAR_ATTR(fifo_threshold);
  54 GFAR_ATTR(fifo_starve);
  55 GFAR_ATTR(fifo_starve_off);
  56
  57 #define to_net_dev(cd) container_of(cd, struct net_device, class_dev)
  58
  59 static ssize_t gfar_show_bd_stash(struct class_device *cdev, char *buf)
  60 {
  61         struct net_device *dev = to_net_dev(cdev);
  62         struct gfar_private *priv = netdev_priv(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 class_device *cdev,
  68                 const char *buf, size_t count)
  69 {
  70         struct net_device *dev = to_net_dev(cdev);
  71         struct gfar_private *priv = netdev_priv(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) || !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 class_device *cdev, char *buf)
 104 {
 105         struct net_device *dev = to_net_dev(cdev);
 106         struct gfar_private *priv = netdev_priv(dev);
 107
 108         return sprintf(buf, "%d\n", priv->rx_stash_size);
 109 }
 110
 111 static ssize_t gfar_set_rx_stash_size(struct class_device *cdev,
 112                 const char *buf, size_t count)
 113 {
 114         struct net_device *dev = to_net_dev(cdev);
 115         struct gfar_private *priv = netdev_priv(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
 150 /* Stashing will only be enabled when rx_stash_size != 0 */
 151 static ssize_t gfar_show_rx_stash_index(struct class_device *cdev, char *buf)
 152 {
 153         struct net_device *dev = to_net_dev(cdev);
 154         struct gfar_private *priv = netdev_priv(dev);
 155
 156         return sprintf(buf, "%d\n", priv->rx_stash_index);
 157 }
 158
 159 static ssize_t gfar_set_rx_stash_index(struct class_device *cdev,
 160                 const char *buf, size_t count)
 161 {
 162         struct net_device *dev = to_net_dev(cdev);
 163         struct gfar_private *priv = netdev_priv(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 class_device *cdev, char *buf)
 188 {
 189         struct net_device *dev = to_net_dev(cdev);
 190         struct gfar_private *priv = netdev_priv(dev);
 191
 192         return sprintf(buf, "%d\n", priv->fifo_threshold);
 193 }
 194
 195 static ssize_t gfar_set_fifo_threshold(struct class_device *cdev,
 196                 const char *buf, size_t count)
 197 {
 198         struct net_device *dev = to_net_dev(cdev);
 199         struct gfar_private *priv = netdev_priv(dev);
 200         unsigned int length = simple_strtoul(buf, NULL, 0);
 201         u32 temp;
 202         unsigned long flags;
 203
 204         if (length > GFAR_MAX_FIFO_THRESHOLD)
 205                 return count;
 206
 207         spin_lock_irqsave(&priv->txlock, flags);
 208
 209         priv->fifo_threshold = length;
 210
 211         temp = gfar_read(&priv->regs->fifo_tx_thr);
 212         temp &= ~FIFO_TX_THR_MASK;
 213         temp |= length;
 214         gfar_write(&priv->regs->fifo_tx_thr, temp);
 215
 216         spin_unlock_irqrestore(&priv->txlock, flags);
 217
 218         return count;
 219 }
 220
 221 static ssize_t gfar_show_fifo_starve(struct class_device *cdev, char *buf)
 222 {
 223         struct net_device *dev = to_net_dev(cdev);
 224         struct gfar_private *priv = netdev_priv(dev);
 225
 226         return sprintf(buf, "%d\n", priv->fifo_starve);
 227 }
 228
 229
 230 static ssize_t gfar_set_fifo_starve(struct class_device *cdev,
 231                 const char *buf, size_t count)
 232 {
 233         struct net_device *dev = to_net_dev(cdev);
 234         struct gfar_private *priv = netdev_priv(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 class_device *cdev, char *buf)
 257 {
 258         struct net_device *dev = to_net_dev(cdev);
 259         struct gfar_private *priv = netdev_priv(dev);
 260
 261         return sprintf(buf, "%d\n", priv->fifo_starve_off);
 262 }
 263
 264 static ssize_t gfar_set_fifo_starve_off(struct class_device *cdev,
 265                 const char *buf, size_t count)
 266 {
 267         struct net_device *dev = to_net_dev(cdev);
 268         struct gfar_private *priv = netdev_priv(dev);
 269         unsigned int num = simple_strtoul(buf, NULL, 0);
 270         u32 temp;
 271         unsigned long flags;
 272
 273         if (num > GFAR_MAX_FIFO_STARVE_OFF)
 274                 return count;
 275
 276         spin_lock_irqsave(&priv->txlock, flags);
 277
 278         priv->fifo_starve_off = num;
 279
 280         temp = gfar_read(&priv->regs->fifo_tx_starve_shutoff);
 281         temp &= ~FIFO_TX_STARVE_OFF_MASK;
 282         temp |= num;
 283         gfar_write(&priv->regs->fifo_tx_starve_shutoff, temp);
 284
 285         spin_unlock_irqrestore(&priv->txlock, flags);
 286
 287         return count;
 288 }
 289
 290 void gfar_init_sysfs(struct net_device *dev)
 291 {
 292         struct gfar_private *priv = netdev_priv(dev);
 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         GFAR_CREATE_FILE(dev, bd_stash);
 304         GFAR_CREATE_FILE(dev, rx_stash_size);
 305         GFAR_CREATE_FILE(dev, rx_stash_index);
 306         GFAR_CREATE_FILE(dev, fifo_threshold);
 307         GFAR_CREATE_FILE(dev, fifo_starve);
 308         GFAR_CREATE_FILE(dev, fifo_starve_off);
 309
 310 }