target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_debugfs.c

   1 /*
   2  *  Atheros AR71xx built-in ethernet mac driver
   3  *
   4  *  Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
   5  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
   6  *
   7  *  Based on Atheros' AG7100 driver
   8  *
   9  *  This program is free software; you can redistribute it and/or modify it
  10  *  under the terms of the GNU General Public License version 2 as published
  11  *  by the Free Software Foundation.
  12  */
  13
  14 #include <linux/debugfs.h>
  15
  16 #include "ag71xx.h"
  17
  18 static struct dentry *ag71xx_debugfs_root;
  19
  20 static int ag71xx_debugfs_generic_open(struct inode *inode, struct file *file)
  21 {
  22         file->private_data = inode->i_private;
  23         return 0;
  24 }
  25
  26 void ag71xx_debugfs_update_int_stats(struct ag71xx *ag, u32 status)
  27 {
  28         if (status)
  29                 ag->debug.int_stats.total++;
  30         if (status & AG71XX_INT_TX_PS)
  31                 ag->debug.int_stats.tx_ps++;
  32         if (status & AG71XX_INT_TX_UR)
  33                 ag->debug.int_stats.tx_ur++;
  34         if (status & AG71XX_INT_TX_BE)
  35                 ag->debug.int_stats.tx_be++;
  36         if (status & AG71XX_INT_RX_PR)
  37                 ag->debug.int_stats.rx_pr++;
  38         if (status & AG71XX_INT_RX_OF)
  39                 ag->debug.int_stats.rx_of++;
  40         if (status & AG71XX_INT_RX_BE)
  41                 ag->debug.int_stats.rx_be++;
  42 }
  43
  44 static ssize_t read_file_int_stats(struct file *file, char __user *user_buf,
  45                                    size_t count, loff_t *ppos)
  46 {
  47 #define PR_INT_STAT(_label, _field)                                     \
  48         len += snprintf(buf + len, sizeof(buf) - len,                   \
  49                 "%20s: %10lu\n", _label, ag->debug.int_stats._field);
  50
  51         struct ag71xx *ag = file->private_data;
  52         char buf[256];
  53         unsigned int len = 0;
  54
  55         PR_INT_STAT("TX Packet Sent", tx_ps);
  56         PR_INT_STAT("TX Underrun", tx_ur);
  57         PR_INT_STAT("TX Bus Error", tx_be);
  58         PR_INT_STAT("RX Packet Received", rx_pr);
  59         PR_INT_STAT("RX Overflow", rx_of);
  60         PR_INT_STAT("RX Bus Error", rx_be);
  61         len += snprintf(buf + len, sizeof(buf) - len, "\n");
  62         PR_INT_STAT("Total", total);
  63
  64         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
  65 #undef PR_INT_STAT
  66 }
  67
  68 static const struct file_operations ag71xx_fops_int_stats = {
  69         .open   = ag71xx_debugfs_generic_open,
  70         .read   = read_file_int_stats,
  71         .owner  = THIS_MODULE
  72 };
  73
  74 void ag71xx_debugfs_update_napi_stats(struct ag71xx *ag, int rx, int tx)
  75 {
  76         struct ag71xx_napi_stats *stats = &ag->debug.napi_stats;
  77
  78         if (rx) {
  79                 stats->rx_count++;
  80                 stats->rx_packets += rx;
  81                 if (rx <= AG71XX_NAPI_WEIGHT)
  82                         stats->rx[rx]++;
  83                 if (rx > stats->rx_packets_max)
  84                         stats->rx_packets_max = rx;
  85         }
  86
  87         if (tx) {
  88                 stats->tx_count++;
  89                 stats->tx_packets += tx;
  90                 if (tx <= AG71XX_NAPI_WEIGHT)
  91                         stats->tx[tx]++;
  92                 if (tx > stats->tx_packets_max)
  93                         stats->tx_packets_max = tx;
  94         }
  95 }
  96
  97 static ssize_t read_file_napi_stats(struct file *file, char __user *user_buf,
  98                                     size_t count, loff_t *ppos)
  99 {
 100         struct ag71xx *ag = file->private_data;
 101         struct ag71xx_napi_stats *stats = &ag->debug.napi_stats;
 102         char buf[2048];
 103         unsigned int len = 0;
 104         unsigned long rx_avg = 0;
 105         unsigned long tx_avg = 0;
 106         int i;
 107
 108         if (stats->rx_count)
 109                 rx_avg = stats->rx_packets / stats->rx_count;
 110
 111         if (stats->tx_count)
 112                 tx_avg = stats->tx_packets / stats->tx_count;
 113
 114         len += snprintf(buf + len, sizeof(buf) - len, "%3s  %10s %10s\n",
 115                         "len", "rx", "tx");
 116
 117         for (i = 1; i <= AG71XX_NAPI_WEIGHT; i++)
 118                 len += snprintf(buf + len, sizeof(buf) - len,
 119                                 "%3d: %10lu %10lu\n",
 120                                 i, stats->rx[i], stats->tx[i]);
 121
 122         len += snprintf(buf + len, sizeof(buf) - len, "\n");
 123
 124         len += snprintf(buf + len, sizeof(buf) - len, "%3s: %10lu %10lu\n",
 125                         "sum", stats->rx_count, stats->tx_count);
 126         len += snprintf(buf + len, sizeof(buf) - len, "%3s: %10lu %10lu\n",
 127                         "avg", rx_avg, tx_avg);
 128         len += snprintf(buf + len, sizeof(buf) - len, "%3s: %10lu %10lu\n",
 129                         "max", stats->rx_packets_max, stats->tx_packets_max);
 130         len += snprintf(buf + len, sizeof(buf) - len, "%3s: %10lu %10lu\n",
 131                         "pkt", stats->rx_packets, stats->tx_packets);
 132
 133         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
 134 }
 135
 136 static const struct file_operations ag71xx_fops_napi_stats = {
 137         .open   = ag71xx_debugfs_generic_open,
 138         .read   = read_file_napi_stats,
 139         .owner  = THIS_MODULE
 140 };
 141
 142 void ag71xx_debugfs_exit(struct ag71xx *ag)
 143 {
 144         debugfs_remove(ag->debug.debugfs_napi_stats);
 145         debugfs_remove(ag->debug.debugfs_int_stats);
 146         debugfs_remove(ag->debug.debugfs_dir);
 147 }
 148
 149 int ag71xx_debugfs_init(struct ag71xx *ag)
 150 {
 151         ag->debug.debugfs_dir = debugfs_create_dir(ag->dev->name,
 152                                                    ag71xx_debugfs_root);
 153         if (!ag->debug.debugfs_dir)
 154                 goto err;
 155
 156         ag->debug.debugfs_int_stats =
 157                         debugfs_create_file("int_stats",
 158                                             S_IRUGO,
 159                                             ag->debug.debugfs_dir,
 160                                             ag,
 161                                             &ag71xx_fops_int_stats);
 162         if (!ag->debug.debugfs_int_stats)
 163                 goto err;
 164
 165         ag->debug.debugfs_napi_stats =
 166                         debugfs_create_file("napi_stats",
 167                                             S_IRUGO,
 168                                             ag->debug.debugfs_dir,
 169                                             ag,
 170                                             &ag71xx_fops_napi_stats);
 171         if (!ag->debug.debugfs_napi_stats)
 172                 goto err;
 173
 174         return 0;
 175
 176  err:
 177         ag71xx_debugfs_exit(ag);
 178         return -ENOMEM;
 179 }
 180
 181 int ag71xx_debugfs_root_init(void)
 182 {
 183         if (ag71xx_debugfs_root)
 184                 return -EBUSY;
 185
 186         ag71xx_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
 187         if (!ag71xx_debugfs_root)
 188                 return -ENOENT;
 189
 190         return 0;
 191 }
 192
 193 void ag71xx_debugfs_root_exit(void)
 194 {
 195         debugfs_remove(ag71xx_debugfs_root);
 196         ag71xx_debugfs_root = NULL;
 197 }