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Diffstat (limited to 'net/mac80211/rc80211_minstrel_ht_debugfs.c')
-rw-r--r--net/mac80211/rc80211_minstrel_ht_debugfs.c325
1 files changed, 325 insertions, 0 deletions
diff --git a/net/mac80211/rc80211_minstrel_ht_debugfs.c b/net/mac80211/rc80211_minstrel_ht_debugfs.c
new file mode 100644
index 000000000..bebb71917
--- /dev/null
+++ b/net/mac80211/rc80211_minstrel_ht_debugfs.c
@@ -0,0 +1,325 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
+ */
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/debugfs.h>
+#include <linux/ieee80211.h>
+#include <linux/export.h>
+#include <net/mac80211.h>
+#include "rc80211_minstrel.h"
+#include "rc80211_minstrel_ht.h"
+
+static ssize_t
+minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos)
+{
+ struct minstrel_debugfs_info *ms;
+
+ ms = file->private_data;
+ return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len);
+}
+
+static int
+minstrel_stats_release(struct inode *inode, struct file *file)
+{
+ kfree(file->private_data);
+ return 0;
+}
+
+static char *
+minstrel_ht_stats_dump(struct minstrel_ht_sta *mi, int i, char *p)
+{
+ const struct mcs_group *mg;
+ unsigned int j, tp_max, tp_avg, eprob, tx_time;
+ char htmode = '2';
+ char gimode = 'L';
+ u32 gflags;
+
+ if (!mi->supported[i])
+ return p;
+
+ mg = &minstrel_mcs_groups[i];
+ gflags = mg->flags;
+
+ if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH)
+ htmode = '4';
+ else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH)
+ htmode = '8';
+ if (gflags & IEEE80211_TX_RC_SHORT_GI)
+ gimode = 'S';
+
+ for (j = 0; j < MCS_GROUP_RATES; j++) {
+ struct minstrel_rate_stats *mrs = &mi->groups[i].rates[j];
+ static const int bitrates[4] = { 10, 20, 55, 110 };
+ int idx = i * MCS_GROUP_RATES + j;
+ unsigned int duration;
+
+ if (!(mi->supported[i] & BIT(j)))
+ continue;
+
+ if (gflags & IEEE80211_TX_RC_MCS) {
+ p += sprintf(p, "HT%c0 ", htmode);
+ p += sprintf(p, "%cGI ", gimode);
+ p += sprintf(p, "%d ", mg->streams);
+ } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
+ p += sprintf(p, "VHT%c0 ", htmode);
+ p += sprintf(p, "%cGI ", gimode);
+ p += sprintf(p, "%d ", mg->streams);
+ } else {
+ p += sprintf(p, "CCK ");
+ p += sprintf(p, "%cP ", j < 4 ? 'L' : 'S');
+ p += sprintf(p, "1 ");
+ }
+
+ *(p++) = (idx == mi->max_tp_rate[0]) ? 'A' : ' ';
+ *(p++) = (idx == mi->max_tp_rate[1]) ? 'B' : ' ';
+ *(p++) = (idx == mi->max_tp_rate[2]) ? 'C' : ' ';
+ *(p++) = (idx == mi->max_tp_rate[3]) ? 'D' : ' ';
+ *(p++) = (idx == mi->max_prob_rate) ? 'P' : ' ';
+
+ if (gflags & IEEE80211_TX_RC_MCS) {
+ p += sprintf(p, " MCS%-2u", (mg->streams - 1) * 8 + j);
+ } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
+ p += sprintf(p, " MCS%-1u/%1u", j, mg->streams);
+ } else {
+ int r = bitrates[j % 4];
+
+ p += sprintf(p, " %2u.%1uM", r / 10, r % 10);
+ }
+
+ p += sprintf(p, " %3u ", idx);
+
+ /* tx_time[rate(i)] in usec */
+ duration = mg->duration[j];
+ duration <<= mg->shift;
+ tx_time = DIV_ROUND_CLOSEST(duration, 1000);
+ p += sprintf(p, "%6u ", tx_time);
+
+ tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
+ tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_avg);
+ eprob = MINSTREL_TRUNC(mrs->prob_avg * 1000);
+
+ p += sprintf(p, "%4u.%1u %4u.%1u %3u.%1u"
+ " %3u %3u %-3u "
+ "%9llu %-9llu\n",
+ tp_max / 10, tp_max % 10,
+ tp_avg / 10, tp_avg % 10,
+ eprob / 10, eprob % 10,
+ mrs->retry_count,
+ mrs->last_success,
+ mrs->last_attempts,
+ (unsigned long long)mrs->succ_hist,
+ (unsigned long long)mrs->att_hist);
+ }
+
+ return p;
+}
+
+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;
+ int ret;
+ char *p;
+
+ if (!msp->is_ht) {
+ inode->i_private = &msp->legacy;
+ ret = minstrel_stats_open(inode, file);
+ inode->i_private = msp;
+ return ret;
+ }
+
+ ms = kmalloc(32768, GFP_KERNEL);
+ if (!ms)
+ return -ENOMEM;
+
+ file->private_data = ms;
+ p = ms->buf;
+
+ p += sprintf(p, "\n");
+ p += sprintf(p,
+ " best ____________rate__________ ____statistics___ _____last____ ______sum-of________\n");
+ p += sprintf(p,
+ "mode guard # rate [name idx airtime max_tp] [avg(tp) avg(prob)] [retry|suc|att] [#success | #attempts]\n");
+
+ p = minstrel_ht_stats_dump(mi, MINSTREL_CCK_GROUP, p);
+ for (i = 0; i < MINSTREL_CCK_GROUP; i++)
+ p = minstrel_ht_stats_dump(mi, i, p);
+ for (i++; i < ARRAY_SIZE(mi->groups); i++)
+ p = minstrel_ht_stats_dump(mi, i, p);
+
+ p += sprintf(p, "\nTotal packet count:: ideal %d "
+ "lookaround %d\n",
+ max(0, (int) mi->total_packets - (int) mi->sample_packets),
+ mi->sample_packets);
+ if (mi->avg_ampdu_len)
+ p += sprintf(p, "Average # of aggregated frames per A-MPDU: %d.%d\n",
+ MINSTREL_TRUNC(mi->avg_ampdu_len),
+ MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
+ ms->len = p - ms->buf;
+ WARN_ON(ms->len + sizeof(*ms) > 32768);
+
+ return nonseekable_open(inode, file);
+}
+
+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,
+ .llseek = no_llseek,
+};
+
+static char *
+minstrel_ht_stats_csv_dump(struct minstrel_ht_sta *mi, int i, char *p)
+{
+ const struct mcs_group *mg;
+ unsigned int j, tp_max, tp_avg, eprob, tx_time;
+ char htmode = '2';
+ char gimode = 'L';
+ u32 gflags;
+
+ if (!mi->supported[i])
+ return p;
+
+ mg = &minstrel_mcs_groups[i];
+ gflags = mg->flags;
+
+ if (gflags & IEEE80211_TX_RC_40_MHZ_WIDTH)
+ htmode = '4';
+ else if (gflags & IEEE80211_TX_RC_80_MHZ_WIDTH)
+ htmode = '8';
+ if (gflags & IEEE80211_TX_RC_SHORT_GI)
+ gimode = 'S';
+
+ for (j = 0; j < MCS_GROUP_RATES; j++) {
+ struct minstrel_rate_stats *mrs = &mi->groups[i].rates[j];
+ static const int bitrates[4] = { 10, 20, 55, 110 };
+ int idx = i * MCS_GROUP_RATES + j;
+ unsigned int duration;
+
+ if (!(mi->supported[i] & BIT(j)))
+ continue;
+
+ if (gflags & IEEE80211_TX_RC_MCS) {
+ p += sprintf(p, "HT%c0,", htmode);
+ p += sprintf(p, "%cGI,", gimode);
+ p += sprintf(p, "%d,", mg->streams);
+ } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
+ p += sprintf(p, "VHT%c0,", htmode);
+ p += sprintf(p, "%cGI,", gimode);
+ p += sprintf(p, "%d,", mg->streams);
+ } else {
+ p += sprintf(p, "CCK,");
+ p += sprintf(p, "%cP,", j < 4 ? 'L' : 'S');
+ p += sprintf(p, "1,");
+ }
+
+ p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[0]) ? "A" : ""));
+ p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[1]) ? "B" : ""));
+ p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[2]) ? "C" : ""));
+ p += sprintf(p, "%s" ,((idx == mi->max_tp_rate[3]) ? "D" : ""));
+ p += sprintf(p, "%s" ,((idx == mi->max_prob_rate) ? "P" : ""));
+
+ if (gflags & IEEE80211_TX_RC_MCS) {
+ p += sprintf(p, ",MCS%-2u,", (mg->streams - 1) * 8 + j);
+ } else if (gflags & IEEE80211_TX_RC_VHT_MCS) {
+ p += sprintf(p, ",MCS%-1u/%1u,", j, mg->streams);
+ } else {
+ int r = bitrates[j % 4];
+ p += sprintf(p, ",%2u.%1uM,", r / 10, r % 10);
+ }
+
+ p += sprintf(p, "%u,", idx);
+
+ duration = mg->duration[j];
+ duration <<= mg->shift;
+ tx_time = DIV_ROUND_CLOSEST(duration, 1000);
+ p += sprintf(p, "%u,", tx_time);
+
+ tp_max = minstrel_ht_get_tp_avg(mi, i, j, MINSTREL_FRAC(100, 100));
+ tp_avg = minstrel_ht_get_tp_avg(mi, i, j, mrs->prob_avg);
+ eprob = MINSTREL_TRUNC(mrs->prob_avg * 1000);
+
+ p += sprintf(p, "%u.%u,%u.%u,%u.%u,%u,%u,"
+ "%u,%llu,%llu,",
+ tp_max / 10, tp_max % 10,
+ tp_avg / 10, tp_avg % 10,
+ eprob / 10, eprob % 10,
+ mrs->retry_count,
+ mrs->last_success,
+ mrs->last_attempts,
+ (unsigned long long)mrs->succ_hist,
+ (unsigned long long)mrs->att_hist);
+ p += sprintf(p, "%d,%d,%d.%d\n",
+ max(0, (int) mi->total_packets -
+ (int) mi->sample_packets),
+ mi->sample_packets,
+ MINSTREL_TRUNC(mi->avg_ampdu_len),
+ MINSTREL_TRUNC(mi->avg_ampdu_len * 10) % 10);
+ }
+
+ return p;
+}
+
+static int
+minstrel_ht_stats_csv_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;
+ int ret;
+ char *p;
+
+ if (!msp->is_ht) {
+ inode->i_private = &msp->legacy;
+ ret = minstrel_stats_csv_open(inode, file);
+ inode->i_private = msp;
+ return ret;
+ }
+
+ ms = kmalloc(32768, GFP_KERNEL);
+
+ if (!ms)
+ return -ENOMEM;
+
+ file->private_data = ms;
+
+ p = ms->buf;
+
+ p = minstrel_ht_stats_csv_dump(mi, MINSTREL_CCK_GROUP, p);
+ for (i = 0; i < MINSTREL_CCK_GROUP; i++)
+ p = minstrel_ht_stats_csv_dump(mi, i, p);
+ for (i++; i < ARRAY_SIZE(mi->groups); i++)
+ p = minstrel_ht_stats_csv_dump(mi, i, p);
+
+ ms->len = p - ms->buf;
+ WARN_ON(ms->len + sizeof(*ms) > 32768);
+
+ return nonseekable_open(inode, file);
+}
+
+static const struct file_operations minstrel_ht_stat_csv_fops = {
+ .owner = THIS_MODULE,
+ .open = minstrel_ht_stats_csv_open,
+ .read = minstrel_stats_read,
+ .release = minstrel_stats_release,
+ .llseek = no_llseek,
+};
+
+void
+minstrel_ht_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir)
+{
+ struct minstrel_ht_sta_priv *msp = priv_sta;
+
+ debugfs_create_file("rc_stats", 0444, dir, msp,
+ &minstrel_ht_stat_fops);
+ debugfs_create_file("rc_stats_csv", 0444, dir, msp,
+ &minstrel_ht_stat_csv_fops);
+}
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