target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_debugfs.c

   1 /*
   2  *  Ralink SoC ethernet driver debugfs code
   3  *
   4  *  Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify it
   7  *  under the terms of the GNU General Public License version 2 as published
   8  *  by the Free Software Foundation.
   9  */
  10
  11 #include <linux/debugfs.h>
  12 #include <linux/module.h>
  13 #include <linux/phy.h>
  14
  15 #include "ramips_eth.h"
  16
  17 static struct dentry *raeth_debugfs_root;
  18
  19 static int raeth_debugfs_generic_open(struct inode *inode, struct file *file)
  20 {
  21         file->private_data = inode->i_private;
  22         return 0;
  23 }
  24
  25 void raeth_debugfs_update_int_stats(struct raeth_priv *re, u32 status)
  26 {
  27         re->debug.int_stats.total += !!status;
  28
  29         re->debug.int_stats.rx_delayed += !!(status & RAMIPS_RX_DLY_INT);
  30         re->debug.int_stats.rx_done0 += !!(status & RAMIPS_RX_DONE_INT0);
  31         re->debug.int_stats.rx_coherent += !!(status & RAMIPS_RX_COHERENT);
  32
  33         re->debug.int_stats.tx_delayed += !!(status & RAMIPS_TX_DLY_INT);
  34         re->debug.int_stats.tx_done0 += !!(status & RAMIPS_TX_DONE_INT0);
  35         re->debug.int_stats.tx_done1 += !!(status & RAMIPS_TX_DONE_INT1);
  36         re->debug.int_stats.tx_done2 += !!(status & RAMIPS_TX_DONE_INT2);
  37         re->debug.int_stats.tx_done3 += !!(status & RAMIPS_TX_DONE_INT3);
  38         re->debug.int_stats.tx_coherent += !!(status & RAMIPS_TX_COHERENT);
  39
  40         re->debug.int_stats.pse_fq_empty += !!(status & RAMIPS_PSE_FQ_EMPTY);
  41         re->debug.int_stats.pse_p0_fc += !!(status & RAMIPS_PSE_P0_FC);
  42         re->debug.int_stats.pse_p1_fc += !!(status & RAMIPS_PSE_P1_FC);
  43         re->debug.int_stats.pse_p2_fc += !!(status & RAMIPS_PSE_P2_FC);
  44         re->debug.int_stats.pse_buf_drop += !!(status & RAMIPS_PSE_BUF_DROP);
  45 }
  46
  47 static ssize_t read_file_int_stats(struct file *file, char __user *user_buf,
  48                                    size_t count, loff_t *ppos)
  49 {
  50 #define PR_INT_STAT(_label, _field)                                     \
  51         len += snprintf(buf + len, sizeof(buf) - len,                   \
  52                 "%-18s: %10lu\n", _label, re->debug.int_stats._field);
  53
  54         struct raeth_priv *re = file->private_data;
  55         char buf[512];
  56         unsigned int len = 0;
  57         unsigned long flags;
  58
  59         spin_lock_irqsave(&re->page_lock, flags);
  60
  61         PR_INT_STAT("RX Delayed", rx_delayed);
  62         PR_INT_STAT("RX Done 0", rx_done0);
  63         PR_INT_STAT("RX Coherent", rx_coherent);
  64
  65         PR_INT_STAT("TX Delayed", tx_delayed);
  66         PR_INT_STAT("TX Done 0", tx_done0);
  67         PR_INT_STAT("TX Done 1", tx_done1);
  68         PR_INT_STAT("TX Done 2", tx_done2);
  69         PR_INT_STAT("TX Done 3", tx_done3);
  70         PR_INT_STAT("TX Coherent", tx_coherent);
  71
  72         PR_INT_STAT("PSE FQ empty", pse_fq_empty);
  73         PR_INT_STAT("CDMA Flow control", pse_p0_fc);
  74         PR_INT_STAT("GDMA1 Flow control", pse_p1_fc);
  75         PR_INT_STAT("GDMA2 Flow control", pse_p2_fc);
  76         PR_INT_STAT("PSE discard", pse_buf_drop);
  77
  78         len += snprintf(buf + len, sizeof(buf) - len, "\n");
  79         PR_INT_STAT("Total", total);
  80
  81         spin_unlock_irqrestore(&re->page_lock, flags);
  82
  83         return simple_read_from_buffer(user_buf, count, ppos, buf, len);
  84 #undef PR_INT_STAT
  85 }
  86
  87 static const struct file_operations raeth_fops_int_stats = {
  88         .open   = raeth_debugfs_generic_open,
  89         .read   = read_file_int_stats,
  90         .owner  = THIS_MODULE
  91 };
  92
  93 void raeth_debugfs_exit(struct raeth_priv *re)
  94 {
  95         debugfs_remove_recursive(re->debug.debugfs_dir);
  96 }
  97
  98 int raeth_debugfs_init(struct raeth_priv *re)
  99 {
 100         re->debug.debugfs_dir = debugfs_create_dir(re->netdev->name,
 101                                                    raeth_debugfs_root);
 102         if (!re->debug.debugfs_dir)
 103                 return -ENOMEM;
 104
 105         debugfs_create_file("int_stats", S_IRUGO, re->debug.debugfs_dir,
 106                             re, &raeth_fops_int_stats);
 107
 108         return 0;
 109 }
 110
 111 int raeth_debugfs_root_init(void)
 112 {
 113         if (raeth_debugfs_root)
 114                 return -EBUSY;
 115
 116         raeth_debugfs_root = debugfs_create_dir("raeth", NULL);
 117         if (!raeth_debugfs_root)
 118                 return -ENOENT;
 119
 120         return 0;
 121 }
 122
 123 void raeth_debugfs_root_exit(void)
 124 {
 125         debugfs_remove(raeth_debugfs_root);
 126         raeth_debugfs_root = NULL;
 127 }