/******************************************************************************
*
- * Copyright(c) 2005 - 2008 Intel Corporation. All rights reserved.
+ * Copyright(c) 2005 - 2009 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* file called LICENSE.
*
* Contact Information:
- * James P. Ketrenos <ipw2100-admin@linux.intel.com>
+ * Intel Linux Wireless <ilw@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
*****************************************************************************/
#include <linux/workqueue.h>
+#include "iwl-commands.h"
#include "iwl-3945.h"
#define RS_NAME "iwl-3945-rs"
struct iwl3945_rs_sta {
spinlock_t lock;
+ struct iwl_priv *priv;
s32 *expected_tpt;
unsigned long last_partial_flush;
unsigned long last_flush;
u8 start_rate;
u8 ibss_sta_added;
struct timer_list rate_scale_flush;
- struct iwl3945_rate_scale_data win[IWL_RATE_COUNT];
+ struct iwl3945_rate_scale_data win[IWL_RATE_COUNT_3945];
+#ifdef CONFIG_MAC80211_DEBUGFS
+ struct dentry *rs_sta_dbgfs_stats_table_file;
+#endif
/* used to be in sta_info */
int last_txrate_idx;
};
-static s32 iwl3945_expected_tpt_g[IWL_RATE_COUNT] = {
+static s32 iwl3945_expected_tpt_g[IWL_RATE_COUNT_3945] = {
7, 13, 35, 58, 0, 0, 76, 104, 130, 168, 191, 202
};
-static s32 iwl3945_expected_tpt_g_prot[IWL_RATE_COUNT] = {
+static s32 iwl3945_expected_tpt_g_prot[IWL_RATE_COUNT_3945] = {
7, 13, 35, 58, 0, 0, 0, 80, 93, 113, 123, 125
};
-static s32 iwl3945_expected_tpt_a[IWL_RATE_COUNT] = {
+static s32 iwl3945_expected_tpt_a[IWL_RATE_COUNT_3945] = {
0, 0, 0, 0, 40, 57, 72, 98, 121, 154, 177, 186
};
-static s32 iwl3945_expected_tpt_b[IWL_RATE_COUNT] = {
+static s32 iwl3945_expected_tpt_b[IWL_RATE_COUNT_3945] = {
7, 13, 35, 58, 0, 0, 0, 0, 0, 0, 0, 0
};
};
#define IWL_RATE_MAX_WINDOW 62
-#define IWL_RATE_FLUSH (3*HZ/10)
+#define IWL_RATE_FLUSH (3*HZ)
#define IWL_RATE_WIN_FLUSH (HZ/2)
-#define IWL_RATE_HIGH_TH 11520
+#define IWL39_RATE_HIGH_TH 11520
+#define IWL_SUCCESS_UP_TH 8960
+#define IWL_SUCCESS_DOWN_TH 10880
#define IWL_RATE_MIN_FAILURE_TH 8
#define IWL_RATE_MIN_SUCCESS_TH 8
#define IWL_RATE_DECREASE_TH 1920
window->success_counter = 0;
window->success_ratio = -1;
window->counter = 0;
- window->average_tpt = IWL_INV_TPT;
+ window->average_tpt = IWL_INVALID_VALUE;
window->stamp = 0;
}
int unflushed = 0;
int i;
unsigned long flags;
+ struct iwl_priv *priv = rs_sta->priv;
/*
* For each rate, if we have collected data on that rate
* and it has been more than IWL_RATE_WIN_FLUSH
* since we flushed, clear out the gathered statistics
*/
- for (i = 0; i < IWL_RATE_COUNT; i++) {
+ for (i = 0; i < IWL_RATE_COUNT_3945; i++) {
if (!rs_sta->win[i].counter)
continue;
#define IWL_RATE_FLUSH_MAX 5000 /* msec */
#define IWL_RATE_FLUSH_MIN 50 /* msec */
+#define IWL_AVERAGE_PACKETS 1500
static void iwl3945_bg_rate_scale_flush(unsigned long data)
{
struct iwl3945_rs_sta *rs_sta = (void *)data;
+ struct iwl_priv *priv = rs_sta->priv;
int unflushed = 0;
unsigned long flags;
u32 packet_count, duration, pps;
spin_lock_irqsave(&rs_sta->lock, flags);
- rs_sta->flush_pending = 0;
-
/* Number of packets Rx'd since last time this timer ran */
packet_count = (rs_sta->tx_packets - rs_sta->last_tx_packets) + 1;
if (unflushed) {
duration =
jiffies_to_msecs(jiffies - rs_sta->last_partial_flush);
-/* duration = jiffies_to_msecs(rs_sta->flush_time); */
IWL_DEBUG_RATE("Tx'd %d packets in %dms\n",
packet_count, duration);
pps = 0;
if (pps) {
- duration = IWL_RATE_FLUSH_MAX / pps;
+ duration = (IWL_AVERAGE_PACKETS * 1000) / pps;
if (duration < IWL_RATE_FLUSH_MIN)
duration = IWL_RATE_FLUSH_MIN;
+ else if (duration > IWL_RATE_FLUSH_MAX)
+ duration = IWL_RATE_FLUSH_MAX;
} else
duration = IWL_RATE_FLUSH_MAX;
rs_sta->flush_time);
rs_sta->last_partial_flush = jiffies;
+ } else {
+ rs_sta->flush_time = IWL_RATE_FLUSH;
+ rs_sta->flush_pending = 0;
}
-
/* If there weren't any unflushed entries, we don't schedule the timer
* to run again */
*/
static void iwl3945_collect_tx_data(struct iwl3945_rs_sta *rs_sta,
struct iwl3945_rate_scale_data *window,
- int success, int retries)
+ int success, int retries, int index)
{
unsigned long flags;
+ s32 fail_count;
+ struct iwl_priv *priv = rs_sta->priv;
if (!retries) {
IWL_DEBUG_RATE("leave: retries == 0 -- should be at least 1\n");
return;
}
+ spin_lock_irqsave(&rs_sta->lock, flags);
while (retries--) {
- spin_lock_irqsave(&rs_sta->lock, flags);
/* If we have filled up the window then subtract one from the
* success counter if the high-bit is counting toward
/* Tag this window as having been updated */
window->stamp = jiffies;
- spin_unlock_irqrestore(&rs_sta->lock, flags);
}
+
+ fail_count = window->counter - window->success_counter;
+ if ((fail_count >= IWL_RATE_MIN_FAILURE_TH) ||
+ (window->success_counter >= IWL_RATE_MIN_SUCCESS_TH))
+ window->average_tpt = ((window->success_ratio *
+ rs_sta->expected_tpt[index] + 64) / 128);
+ else
+ window->average_tpt = IWL_INVALID_VALUE;
+
+ spin_unlock_irqrestore(&rs_sta->lock, flags);
+
}
-static void rs_rate_init(void *priv, struct ieee80211_supported_band *sband,
+static void rs_rate_init(void *priv_r, struct ieee80211_supported_band *sband,
struct ieee80211_sta *sta, void *priv_sta)
{
struct iwl3945_rs_sta *rs_sta = priv_sta;
+ struct iwl_priv *priv = (struct iwl_priv *)priv_r;
int i;
IWL_DEBUG_RATE("enter\n");
* previous packets? Need to have IEEE 802.1X auth succeed immediately
* after assoc.. */
- for (i = IWL_RATE_COUNT - 1; i >= 0; i--) {
+ for (i = sband->n_bitrates - 1; i >= 0; i--) {
if (sta->supp_rates[sband->band] & (1 << i)) {
rs_sta->last_txrate_idx = i;
break;
}
}
+ priv->sta_supp_rates = sta->supp_rates[sband->band];
/* For 5 GHz band it start at IWL_FIRST_OFDM_RATE */
- if (sband->band == IEEE80211_BAND_5GHZ)
+ if (sband->band == IEEE80211_BAND_5GHZ) {
rs_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE;
+ priv->sta_supp_rates = priv->sta_supp_rates <<
+ IWL_FIRST_OFDM_RATE;
+ }
+
IWL_DEBUG_RATE("leave\n");
}
return;
}
-static void *rs_alloc_sta(void *priv, struct ieee80211_sta *sta, gfp_t gfp)
+static void *rs_alloc_sta(void *iwl_priv, struct ieee80211_sta *sta, gfp_t gfp)
{
struct iwl3945_rs_sta *rs_sta;
struct iwl3945_sta_priv *psta = (void *) sta->drv_priv;
+ struct iwl_priv *priv = iwl_priv;
int i;
/*
spin_lock_init(&rs_sta->lock);
+ rs_sta->priv = priv;
+
rs_sta->start_rate = IWL_RATE_INVALID;
/* default to just 802.11b */
rs_sta->rate_scale_flush.data = (unsigned long)rs_sta;
rs_sta->rate_scale_flush.function = &iwl3945_bg_rate_scale_flush;
- for (i = 0; i < IWL_RATE_COUNT; i++)
+ for (i = 0; i < IWL_RATE_COUNT_3945; i++)
iwl3945_clear_window(&rs_sta->win[i]);
IWL_DEBUG_RATE("leave\n");
return rs_sta;
}
-static void rs_free_sta(void *priv, struct ieee80211_sta *sta,
+static void rs_free_sta(void *iwl_priv, struct ieee80211_sta *sta,
void *priv_sta)
{
struct iwl3945_sta_priv *psta = (void *) sta->drv_priv;
struct iwl3945_rs_sta *rs_sta = priv_sta;
+ struct iwl_priv *priv = rs_sta->priv;
psta->rs_sta = NULL;
/**
* rs_tx_status - Update rate control values based on Tx results
*
- * NOTE: Uses iwl3945_priv->retry_rate for the # of retries attempted by
+ * NOTE: Uses iwl_priv->retry_rate for the # of retries attempted by
* the hardware for each rate.
*/
static void rs_tx_status(void *priv_rate, struct ieee80211_supported_band *sband,
struct ieee80211_sta *sta, void *priv_sta,
struct sk_buff *skb)
{
- u8 retries = 0, current_count;
+ s8 retries = 0, current_count;
int scale_rate_index, first_index, last_index;
unsigned long flags;
- struct iwl3945_priv *priv = (struct iwl3945_priv *)priv_rate;
+ struct iwl_priv *priv = (struct iwl_priv *)priv_rate;
struct iwl3945_rs_sta *rs_sta = priv_sta;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- int i;
IWL_DEBUG_RATE("enter\n");
- for (i = 0; i < IEEE80211_TX_MAX_RATES; i++)
- retries += info->status.rates[i].count;
- retries--;
+ retries = info->status.rates[0].count;
first_index = sband->bitrates[info->status.rates[0].idx].hw_value;
- if ((first_index < 0) || (first_index >= IWL_RATE_COUNT)) {
+ if ((first_index < 0) || (first_index >= IWL_RATE_COUNT_3945)) {
IWL_DEBUG_RATE("leave: Rate out of bounds: %d\n", first_index);
return;
}
* at which the frame was finally transmitted (or failed if no
* ACK)
*/
- while (retries > 0) {
- if (retries < priv->retry_rate) {
- current_count = retries;
+ while (retries > 1) {
+ if ((retries - 1) < priv->retry_rate) {
+ current_count = (retries - 1);
last_index = scale_rate_index;
} else {
current_count = priv->retry_rate;
* as was used for it (per current_count) */
iwl3945_collect_tx_data(rs_sta,
&rs_sta->win[scale_rate_index],
- 0, current_count);
+ 0, current_count, scale_rate_index);
IWL_DEBUG_RATE("Update rate %d for %d retries.\n",
scale_rate_index, current_count);
retries -= current_count;
- if (retries)
- scale_rate_index =
- iwl3945_rs_next_rate(priv, scale_rate_index);
+ scale_rate_index = last_index;
}
"success" : "failure");
iwl3945_collect_tx_data(rs_sta,
&rs_sta->win[last_index],
- info->flags & IEEE80211_TX_STAT_ACK, 1);
+ info->flags & IEEE80211_TX_STAT_ACK, 1, last_index);
/* We updated the rate scale window -- if its been more than
* flush_time since the last run, schedule the flush
spin_lock_irqsave(&rs_sta->lock, flags);
if (!rs_sta->flush_pending &&
- time_after(jiffies, rs_sta->last_partial_flush +
+ time_after(jiffies, rs_sta->last_flush +
rs_sta->flush_time)) {
+ rs_sta->last_partial_flush = jiffies;
rs_sta->flush_pending = 1;
mod_timer(&rs_sta->rate_scale_flush,
jiffies + rs_sta->flush_time);
{
u8 high = IWL_RATE_INVALID;
u8 low = IWL_RATE_INVALID;
+ struct iwl_priv *priv = rs_sta->priv;
/* 802.11A walks to the next literal adjacent rate in
* the rate table */
/* Find the next rate that is in the rate mask */
i = index + 1;
- for (mask = (1 << i); i < IWL_RATE_COUNT; i++, mask <<= 1) {
+ for (mask = (1 << i); i < IWL_RATE_COUNT_3945;
+ i++, mask <<= 1) {
if (rate_mask & mask) {
high = i;
break;
int index;
struct iwl3945_rs_sta *rs_sta = priv_sta;
struct iwl3945_rate_scale_data *window = NULL;
- int current_tpt = IWL_INV_TPT;
- int low_tpt = IWL_INV_TPT;
- int high_tpt = IWL_INV_TPT;
+ int current_tpt = IWL_INVALID_VALUE;
+ int low_tpt = IWL_INVALID_VALUE;
+ int high_tpt = IWL_INVALID_VALUE;
u32 fail_count;
s8 scale_action = 0;
unsigned long flags;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
- u16 fc, rate_mask;
- struct iwl3945_priv *priv = (struct iwl3945_priv *)priv_r;
+ u16 fc;
+ u16 rate_mask = 0;
+ struct iwl_priv *priv = (struct iwl_priv *)priv_r;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
IWL_DEBUG_RATE("enter\n");
+ if (sta)
+ rate_mask = sta->supp_rates[sband->band];
+
/* Send management frames and broadcast/multicast data using lowest
* rate. */
fc = le16_to_cpu(hdr->frame_control);
is_multicast_ether_addr(hdr->addr1) ||
!sta || !priv_sta) {
IWL_DEBUG_RATE("leave: No STA priv data to update!\n");
- info->control.rates[0].idx = rate_lowest_index(sband, sta);
+ if (!rate_mask)
+ info->control.rates[0].idx =
+ rate_lowest_index(sband, NULL);
+ else
+ info->control.rates[0].idx =
+ rate_lowest_index(sband, sta);
return;
}
- rate_mask = sta->supp_rates[sband->band];
- index = min(rs_sta->last_txrate_idx & 0xffff, IWL_RATE_COUNT - 1);
+ index = min(rs_sta->last_txrate_idx & 0xffff, IWL_RATE_COUNT_3945 - 1);
if (sband->band == IEEE80211_BAND_5GHZ)
rate_mask = rate_mask << IWL_FIRST_OFDM_RATE;
spin_lock_irqsave(&rs_sta->lock, flags);
+ /* for recent assoc, choose best rate regarding
+ * to rssi value
+ */
if (rs_sta->start_rate != IWL_RATE_INVALID) {
- index = rs_sta->start_rate;
+ if (rs_sta->start_rate < index &&
+ (rate_mask & (1 << rs_sta->start_rate)))
+ index = rs_sta->start_rate;
rs_sta->start_rate = IWL_RATE_INVALID;
}
if (((fail_count <= IWL_RATE_MIN_FAILURE_TH) &&
(window->success_counter < IWL_RATE_MIN_SUCCESS_TH))) {
- window->average_tpt = IWL_INV_TPT;
spin_unlock_irqrestore(&rs_sta->lock, flags);
IWL_DEBUG_RATE("Invalid average_tpt on rate %d: "
}
- window->average_tpt = ((window->success_ratio *
- rs_sta->expected_tpt[index] + 64) / 128);
current_tpt = window->average_tpt;
high_low = iwl3945_get_adjacent_rate(rs_sta, index, rate_mask,
if ((window->success_ratio < IWL_RATE_DECREASE_TH) || !current_tpt) {
IWL_DEBUG_RATE("decrease rate because of low success_ratio\n");
scale_action = -1;
- } else if ((low_tpt == IWL_INV_TPT) && (high_tpt == IWL_INV_TPT))
+ } else if ((low_tpt == IWL_INVALID_VALUE) &&
+ (high_tpt == IWL_INVALID_VALUE))
scale_action = 1;
- else if ((low_tpt != IWL_INV_TPT) && (high_tpt != IWL_INV_TPT) &&
+ else if ((low_tpt != IWL_INVALID_VALUE) &&
+ (high_tpt != IWL_INVALID_VALUE) &&
(low_tpt < current_tpt) && (high_tpt < current_tpt)) {
IWL_DEBUG_RATE("No action -- low [%d] & high [%d] < "
"current_tpt [%d]\n",
low_tpt, high_tpt, current_tpt);
scale_action = 0;
} else {
- if (high_tpt != IWL_INV_TPT) {
+ if (high_tpt != IWL_INVALID_VALUE) {
if (high_tpt > current_tpt)
scale_action = 1;
else {
("decrease rate because of high tpt\n");
scale_action = -1;
}
- } else if (low_tpt != IWL_INV_TPT) {
+ } else if (low_tpt != IWL_INVALID_VALUE) {
if (low_tpt > current_tpt) {
IWL_DEBUG_RATE
("decrease rate because of low tpt\n");
}
}
- if ((window->success_ratio > IWL_RATE_HIGH_TH) ||
- (current_tpt > window->average_tpt)) {
- IWL_DEBUG_RATE("No action -- success_ratio [%d] > HIGH_TH or "
- "current_tpt [%d] > average_tpt [%d]\n",
- window->success_ratio,
- current_tpt, window->average_tpt);
- scale_action = 0;
+ if (scale_action == -1) {
+ if (window->success_ratio > IWL_SUCCESS_DOWN_TH)
+ scale_action = 0;
+ } else if (scale_action == 1) {
+ if (window->success_ratio < IWL_SUCCESS_UP_TH) {
+ IWL_DEBUG_RATE("No action -- success_ratio [%d] < "
+ "SUCCESS UP\n", window->success_ratio);
+ scale_action = 0;
+ }
}
switch (scale_action) {
IWL_DEBUG_RATE("leave: %d\n", index);
}
+#ifdef CONFIG_MAC80211_DEBUGFS
+static int iwl3945_open_file_generic(struct inode *inode, struct file *file)
+{
+ file->private_data = inode->i_private;
+ return 0;
+}
+
+static ssize_t iwl3945_sta_dbgfs_stats_table_read(struct file *file,
+ char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ char buff[1024];
+ int desc = 0;
+ int j;
+ struct iwl3945_rs_sta *lq_sta = file->private_data;
+
+ desc += sprintf(buff + desc, "tx packets=%d last rate index=%d\n"
+ "rate=0x%X flush time %d\n",
+ lq_sta->tx_packets,
+ lq_sta->last_txrate_idx,
+ lq_sta->start_rate, jiffies_to_msecs(lq_sta->flush_time));
+ for (j = 0; j < IWL_RATE_COUNT_3945; j++) {
+ desc += sprintf(buff+desc,
+ "counter=%d success=%d %%=%d\n",
+ lq_sta->win[j].counter,
+ lq_sta->win[j].success_counter,
+ lq_sta->win[j].success_ratio);
+ }
+ return simple_read_from_buffer(user_buf, count, ppos, buff, desc);
+}
+
+static const struct file_operations rs_sta_dbgfs_stats_table_ops = {
+ .read = iwl3945_sta_dbgfs_stats_table_read,
+ .open = iwl3945_open_file_generic,
+};
+
+static void iwl3945_add_debugfs(void *priv, void *priv_sta,
+ struct dentry *dir)
+{
+ struct iwl3945_rs_sta *lq_sta = priv_sta;
+
+ lq_sta->rs_sta_dbgfs_stats_table_file =
+ debugfs_create_file("rate_stats_table", 0600, dir,
+ lq_sta, &rs_sta_dbgfs_stats_table_ops);
+
+}
+
+static void iwl3945_remove_debugfs(void *priv, void *priv_sta)
+{
+ struct iwl3945_rs_sta *lq_sta = priv_sta;
+ debugfs_remove(lq_sta->rs_sta_dbgfs_stats_table_file);
+}
+#endif
+
static struct rate_control_ops rs_ops = {
.module = NULL,
.name = RS_NAME,
.free = rs_free,
.alloc_sta = rs_alloc_sta,
.free_sta = rs_free_sta,
+#ifdef CONFIG_MAC80211_DEBUGFS
+ .add_sta_debugfs = iwl3945_add_debugfs,
+ .remove_sta_debugfs = iwl3945_remove_debugfs,
+#endif
+
};
void iwl3945_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id)
{
- struct iwl3945_priv *priv = hw->priv;
+ struct iwl_priv *priv = hw->priv;
s32 rssi = 0;
unsigned long flags;
struct iwl3945_rs_sta *rs_sta;
rcu_read_lock();
- sta = ieee80211_find_sta(hw, priv->stations[sta_id].sta.sta.addr);
+ sta = ieee80211_find_sta(hw, priv->stations_39[sta_id].sta.sta.addr);
if (!sta) {
rcu_read_unlock();
return;
switch (priv->band) {
case IEEE80211_BAND_2GHZ:
/* TODO: this always does G, not a regression */
- if (priv->active_rxon.flags & RXON_FLG_TGG_PROTECT_MSK) {
+ if (priv->active39_rxon.flags & RXON_FLG_TGG_PROTECT_MSK) {
rs_sta->tgg = 1;
rs_sta->expected_tpt = iwl3945_expected_tpt_g_prot;
} else
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