android_kernel_xiaomi_sm8350/net/mac80211/debugfs_sta.c
Bruno Randolf 566bfe5a8b mac80211: use hardware flags for signal/noise units
trying to clean up the signal/noise code. the previous code in mac80211 had
confusing names for the related variables, did not have much definition of
what units of signal and noise were provided and used implicit mechanisms from
the wireless extensions.

this patch introduces hardware capability flags to let the hardware specify
clearly if it can provide signal and noise level values and which units it can
provide. this also anticipates possible new units like RCPI in the future.

for signal:

  IEEE80211_HW_SIGNAL_UNSPEC - unspecified, unknown, hw specific
  IEEE80211_HW_SIGNAL_DB     - dB difference to unspecified reference point
  IEEE80211_HW_SIGNAL_DBM    - dBm, difference to 1mW

for noise we currently only have dBm:

  IEEE80211_HW_NOISE_DBM     - dBm, difference to 1mW

if IEEE80211_HW_SIGNAL_UNSPEC or IEEE80211_HW_SIGNAL_DB is used the driver has
to provide the maximum value (max_signal) it reports in order for applications
to make sense of the signal values.

i tried my best to find out for each driver what it can provide and update it
but i'm not sure (?) for some of them and used the more conservative guess in
doubt. this can be fixed easily after this patch has been merged by changing
the hardware flags of the driver.

DRIVER          SIGNAL    MAX	NOISE   QUAL
-----------------------------------------------------------------
adm8211         unspec(?) 100   n/a     missing
at76_usb        unspec(?) (?)   unused  missing
ath5k           dBm             dBm     percent rssi
b43legacy       dBm             dBm     percent jssi(?)
b43             dBm             dBm     percent jssi(?)
iwl-3945        dBm             dBm     percent snr+more
iwl-4965        dBm             dBm     percent snr+more
p54             unspec    127   n/a     missing
rt2x00          dBm	        n/a     percent rssi+tx/rx frame success
  rt2400        dBm             n/a
  rt2500pci     dBm             n/a
  rt2500usb     dBm             n/a
  rt61pci       dBm             n/a
  rt73usb       dBm             n/a
rtl8180         unspec(?) 65    n/a     (?)
rtl8187         unspec(?) 65    (?)     noise(?)
zd1211          dB(?)     100   n/a     percent

drivers/net/wireless/ath5k/base.c:      Changes-licensed-under: 3-Clause-BSD

Signed-off-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-05-14 16:29:49 -04:00

281 lines
8.6 KiB
C

/*
* Copyright 2003-2005 Devicescape Software, Inc.
* Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
*
* 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/debugfs.h>
#include <linux/ieee80211.h>
#include "ieee80211_i.h"
#include "debugfs.h"
#include "debugfs_sta.h"
#include "sta_info.h"
/* sta attributtes */
#define STA_READ(name, buflen, field, format_string) \
static ssize_t sta_ ##name## _read(struct file *file, \
char __user *userbuf, \
size_t count, loff_t *ppos) \
{ \
int res; \
struct sta_info *sta = file->private_data; \
char buf[buflen]; \
res = scnprintf(buf, buflen, format_string, sta->field); \
return simple_read_from_buffer(userbuf, count, ppos, buf, res); \
}
#define STA_READ_D(name, field) STA_READ(name, 20, field, "%d\n")
#define STA_READ_U(name, field) STA_READ(name, 20, field, "%u\n")
#define STA_READ_LU(name, field) STA_READ(name, 20, field, "%lu\n")
#define STA_READ_S(name, field) STA_READ(name, 20, field, "%s\n")
#define STA_OPS(name) \
static const struct file_operations sta_ ##name## _ops = { \
.read = sta_##name##_read, \
.open = mac80211_open_file_generic, \
}
#define STA_OPS_WR(name) \
static const struct file_operations sta_ ##name## _ops = { \
.read = sta_##name##_read, \
.write = sta_##name##_write, \
.open = mac80211_open_file_generic, \
}
#define STA_FILE(name, field, format) \
STA_READ_##format(name, field) \
STA_OPS(name)
STA_FILE(aid, aid, D);
STA_FILE(dev, sdata->dev->name, S);
STA_FILE(rx_packets, rx_packets, LU);
STA_FILE(tx_packets, tx_packets, LU);
STA_FILE(rx_bytes, rx_bytes, LU);
STA_FILE(tx_bytes, tx_bytes, LU);
STA_FILE(rx_duplicates, num_duplicates, LU);
STA_FILE(rx_fragments, rx_fragments, LU);
STA_FILE(rx_dropped, rx_dropped, LU);
STA_FILE(tx_fragments, tx_fragments, LU);
STA_FILE(tx_filtered, tx_filtered_count, LU);
STA_FILE(tx_retry_failed, tx_retry_failed, LU);
STA_FILE(tx_retry_count, tx_retry_count, LU);
STA_FILE(last_signal, last_signal, D);
STA_FILE(last_qual, last_qual, D);
STA_FILE(last_noise, last_noise, D);
STA_FILE(channel_use, channel_use, D);
STA_FILE(wep_weak_iv_count, wep_weak_iv_count, LU);
static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
char buf[100];
struct sta_info *sta = file->private_data;
u32 staflags = get_sta_flags(sta);
int res = scnprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s",
staflags & WLAN_STA_AUTH ? "AUTH\n" : "",
staflags & WLAN_STA_ASSOC ? "ASSOC\n" : "",
staflags & WLAN_STA_PS ? "PS\n" : "",
staflags & WLAN_STA_AUTHORIZED ? "AUTHORIZED\n" : "",
staflags & WLAN_STA_SHORT_PREAMBLE ? "SHORT PREAMBLE\n" : "",
staflags & WLAN_STA_WME ? "WME\n" : "",
staflags & WLAN_STA_WDS ? "WDS\n" : "");
return simple_read_from_buffer(userbuf, count, ppos, buf, res);
}
STA_OPS(flags);
static ssize_t sta_num_ps_buf_frames_read(struct file *file,
char __user *userbuf,
size_t count, loff_t *ppos)
{
char buf[20];
struct sta_info *sta = file->private_data;
int res = scnprintf(buf, sizeof(buf), "%u\n",
skb_queue_len(&sta->ps_tx_buf));
return simple_read_from_buffer(userbuf, count, ppos, buf, res);
}
STA_OPS(num_ps_buf_frames);
static ssize_t sta_inactive_ms_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
char buf[20];
struct sta_info *sta = file->private_data;
int res = scnprintf(buf, sizeof(buf), "%d\n",
jiffies_to_msecs(jiffies - sta->last_rx));
return simple_read_from_buffer(userbuf, count, ppos, buf, res);
}
STA_OPS(inactive_ms);
static ssize_t sta_last_seq_ctrl_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
char buf[15*NUM_RX_DATA_QUEUES], *p = buf;
int i;
struct sta_info *sta = file->private_data;
for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
p += scnprintf(p, sizeof(buf)+buf-p, "%x ",
le16_to_cpu(sta->last_seq_ctrl[i]));
p += scnprintf(p, sizeof(buf)+buf-p, "\n");
return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
}
STA_OPS(last_seq_ctrl);
static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
char buf[768], *p = buf;
int i;
struct sta_info *sta = file->private_data;
p += scnprintf(p, sizeof(buf)+buf-p, "Agg state for STA is:\n");
p += scnprintf(p, sizeof(buf)+buf-p, " STA next dialog_token is %d \n "
"TIDs info is: \n TID :",
(sta->ampdu_mlme.dialog_token_allocator + 1));
for (i = 0; i < STA_TID_NUM; i++)
p += scnprintf(p, sizeof(buf)+buf-p, "%5d", i);
p += scnprintf(p, sizeof(buf)+buf-p, "\n RX :");
for (i = 0; i < STA_TID_NUM; i++)
p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
sta->ampdu_mlme.tid_state_rx[i]);
p += scnprintf(p, sizeof(buf)+buf-p, "\n DTKN:");
for (i = 0; i < STA_TID_NUM; i++)
p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
sta->ampdu_mlme.tid_state_rx[i]?
sta->ampdu_mlme.tid_rx[i]->dialog_token : 0);
p += scnprintf(p, sizeof(buf)+buf-p, "\n TX :");
for (i = 0; i < STA_TID_NUM; i++)
p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
sta->ampdu_mlme.tid_state_tx[i]);
p += scnprintf(p, sizeof(buf)+buf-p, "\n DTKN:");
for (i = 0; i < STA_TID_NUM; i++)
p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
sta->ampdu_mlme.tid_state_tx[i]?
sta->ampdu_mlme.tid_tx[i]->dialog_token : 0);
p += scnprintf(p, sizeof(buf)+buf-p, "\n SSN :");
for (i = 0; i < STA_TID_NUM; i++)
p += scnprintf(p, sizeof(buf)+buf-p, "%5d",
sta->ampdu_mlme.tid_state_tx[i]?
sta->ampdu_mlme.tid_tx[i]->ssn : 0);
p += scnprintf(p, sizeof(buf)+buf-p, "\n");
return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
}
static ssize_t sta_agg_status_write(struct file *file,
const char __user *user_buf, size_t count, loff_t *ppos)
{
struct sta_info *sta = file->private_data;
struct net_device *dev = sta->sdata->dev;
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_hw *hw = &local->hw;
u8 *da = sta->addr;
static int tid_static_tx[16] = {0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0};
static int tid_static_rx[16] = {1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1};
char *endp;
char buf[32];
int buf_size, rs;
unsigned int tid_num;
char state[4];
memset(buf, 0x00, sizeof(buf));
buf_size = min(count, (sizeof(buf)-1));
if (copy_from_user(buf, user_buf, buf_size))
return -EFAULT;
tid_num = simple_strtoul(buf, &endp, 0);
if (endp == buf)
return -EINVAL;
if ((tid_num >= 100) && (tid_num <= 115)) {
/* toggle Rx aggregation command */
tid_num = tid_num - 100;
if (tid_static_rx[tid_num] == 1) {
strcpy(state, "off ");
ieee80211_sta_stop_rx_ba_session(dev, da, tid_num, 0,
WLAN_REASON_QSTA_REQUIRE_SETUP);
sta->ampdu_mlme.tid_state_rx[tid_num] |=
HT_AGG_STATE_DEBUGFS_CTL;
tid_static_rx[tid_num] = 0;
} else {
strcpy(state, "on ");
sta->ampdu_mlme.tid_state_rx[tid_num] &=
~HT_AGG_STATE_DEBUGFS_CTL;
tid_static_rx[tid_num] = 1;
}
printk(KERN_DEBUG "debugfs - try switching tid %u %s\n",
tid_num, state);
} else if ((tid_num >= 0) && (tid_num <= 15)) {
/* toggle Tx aggregation command */
if (tid_static_tx[tid_num] == 0) {
strcpy(state, "on ");
rs = ieee80211_start_tx_ba_session(hw, da, tid_num);
if (rs == 0)
tid_static_tx[tid_num] = 1;
} else {
strcpy(state, "off");
rs = ieee80211_stop_tx_ba_session(hw, da, tid_num, 1);
if (rs == 0)
tid_static_tx[tid_num] = 0;
}
printk(KERN_DEBUG "debugfs - switching tid %u %s, return=%d\n",
tid_num, state, rs);
}
return count;
}
STA_OPS_WR(agg_status);
#define DEBUGFS_ADD(name) \
sta->debugfs.name = debugfs_create_file(#name, 0400, \
sta->debugfs.dir, sta, &sta_ ##name## _ops);
#define DEBUGFS_DEL(name) \
debugfs_remove(sta->debugfs.name);\
sta->debugfs.name = NULL;
void ieee80211_sta_debugfs_add(struct sta_info *sta)
{
struct dentry *stations_dir = sta->local->debugfs.stations;
DECLARE_MAC_BUF(mbuf);
u8 *mac;
if (!stations_dir)
return;
mac = print_mac(mbuf, sta->addr);
sta->debugfs.dir = debugfs_create_dir(mac, stations_dir);
if (!sta->debugfs.dir)
return;
DEBUGFS_ADD(flags);
DEBUGFS_ADD(num_ps_buf_frames);
DEBUGFS_ADD(inactive_ms);
DEBUGFS_ADD(last_seq_ctrl);
DEBUGFS_ADD(agg_status);
}
void ieee80211_sta_debugfs_remove(struct sta_info *sta)
{
DEBUGFS_DEL(flags);
DEBUGFS_DEL(num_ps_buf_frames);
DEBUGFS_DEL(inactive_ms);
DEBUGFS_DEL(last_seq_ctrl);
DEBUGFS_DEL(agg_status);
debugfs_remove(sta->debugfs.dir);
sta->debugfs.dir = NULL;
}