Eric Lee / smarc-fsl-linux-kernel

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net/mac80211/rc80211_minstrel_ht_debugfs.c 3.29 KB
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ec8aa669b   Felix Fietkau   mac80211: add the... 
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  /*
   * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   */
  #include <linux/netdevice.h>
  #include <linux/types.h>
  #include <linux/skbuff.h>
  #include <linux/debugfs.h>
  #include <linux/ieee80211.h>
bc3b2d7fb   Paul Gortmaker   net: Add export.h... 
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  #include <linux/export.h>
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  #include <net/mac80211.h>
  #include "rc80211_minstrel.h"
  #include "rc80211_minstrel_ht.h"
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  static int
  minstrel_ht_stats_open(struct inode *inode, struct file *file)
  {
  	struct minstrel_ht_sta_priv *msp = inode->i_private;
  	struct minstrel_ht_sta *mi = &msp->ht;
  	struct minstrel_debugfs_info *ms;
  	unsigned int i, j, tp, prob, eprob;
  	char *p;
  	int ret;
  
  	if (!msp->is_ht) {
  		inode->i_private = &msp->legacy;
  		ret = minstrel_stats_open(inode, file);
  		inode->i_private = msp;
  		return ret;
  	}
  
  	ms = kmalloc(sizeof(*ms) + 8192, GFP_KERNEL);
  	if (!ms)
  		return -ENOMEM;
  
  	file->private_data = ms;
  	p = ms->buf;
  	p += sprintf(p, "type      rate     throughput  ewma prob   this prob  "
  			"this succ/attempt   success    attempts
  ");
  	for (i = 0; i < MINSTREL_MAX_STREAMS * MINSTREL_STREAM_GROUPS; i++) {
  		char htmode = '2';
  		char gimode = 'L';
  
  		if (!mi->groups[i].supported)
  			continue;
  
  		if (minstrel_mcs_groups[i].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
  			htmode = '4';
  		if (minstrel_mcs_groups[i].flags & IEEE80211_TX_RC_SHORT_GI)
  			gimode = 'S';
  
  		for (j = 0; j < MCS_GROUP_RATES; j++) {
  			struct minstrel_rate_stats *mr = &mi->groups[i].rates[j];
  			int idx = i * MCS_GROUP_RATES + j;
  
  			if (!(mi->groups[i].supported & BIT(j)))
  				continue;
  
  			p += sprintf(p, "HT%c0/%cGI ", htmode, gimode);
  
  			*(p++) = (idx == mi->max_tp_rate) ? 'T' : ' ';
  			*(p++) = (idx == mi->max_tp_rate2) ? 't' : ' ';
  			*(p++) = (idx == mi->max_prob_rate) ? 'P' : ' ';
  			p += sprintf(p, "MCS%-2u", (minstrel_mcs_groups[i].streams - 1) *
  					MCS_GROUP_RATES + j);
  
  			tp = mr->cur_tp / 10;
  			prob = MINSTREL_TRUNC(mr->cur_prob * 1000);
  			eprob = MINSTREL_TRUNC(mr->probability * 1000);
  
  			p += sprintf(p, "  %6u.%1u   %6u.%1u   %6u.%1u        "
  					"%3u(%3u)   %8llu    %8llu
  ",
  					tp / 10, tp % 10,
  					eprob / 10, eprob % 10,
  					prob / 10, prob % 10,
  					mr->last_success,
  					mr->last_attempts,
  					(unsigned long long)mr->succ_hist,
  					(unsigned long long)mr->att_hist);
  		}
  	}
  	p += sprintf(p, "
  Total packet count::    ideal %d      "
  			"lookaround %d
  ",
  			max(0, (int) mi->total_packets - (int) mi->sample_packets),
  			mi->sample_packets);
  	p += sprintf(p, "Average A-MPDU length: %d.%d
  ",
  		MINSTREL_TRUNC(mi->avg_ampdu_len),
  		MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
  	ms->len = p - ms->buf;
a0572d93c   Arnd Bergmann   mac80211: disallo... 
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  	return nonseekable_open(inode, file);
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  }
  
  static const struct file_operations minstrel_ht_stat_fops = {
  	.owner = THIS_MODULE,
  	.open = minstrel_ht_stats_open,
  	.read = minstrel_stats_read,
  	.release = minstrel_stats_release,
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  	.llseek = no_llseek,
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  };
  
  void
  minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
  {
  	struct minstrel_ht_sta_priv *msp = priv_sta;
  
  	msp->dbg_stats = debugfs_create_file("rc_stats", S_IRUGO, dir, msp,
  			&minstrel_ht_stat_fops);
  }
  
  void
  minstrel_ht_remove_sta_debugfs(void *priv, void *priv_sta)
  {
  	struct minstrel_ht_sta_priv *msp = priv_sta;
  
  	debugfs_remove(msp->dbg_stats);
  }