Commit a97b77b9 authored by Vivek Natarajan's avatar Vivek Natarajan Committed by John W. Linville

mac80211: Enhancements to dynamic power save.

This patch enables mac80211 to send a null frame and also to
check for tim in the beacon if dynamic power save is enabled.
Signed-off-by: default avatarVivek Natarajan <vnatarajan@atheros.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 869717fb
......@@ -987,6 +987,9 @@ u64 ieee80211_mandatory_rates(struct ieee80211_local *local,
void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
void ieee80211_dynamic_ps_timer(unsigned long data);
void ieee80211_send_nullfunc(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata,
int powersave);
void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
enum queue_stop_reason reason);
......
......@@ -575,6 +575,30 @@ static void ieee80211_sta_wmm_params(struct ieee80211_local *local,
}
}
static bool check_tim(struct ieee802_11_elems *elems, u16 aid, bool *is_mc)
{
u8 mask;
u8 index, indexn1, indexn2;
struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) elems->tim;
aid &= 0x3fff;
index = aid / 8;
mask = 1 << (aid & 7);
if (tim->bitmap_ctrl & 0x01)
*is_mc = true;
indexn1 = tim->bitmap_ctrl & 0xfe;
indexn2 = elems->tim_len + indexn1 - 4;
if (index < indexn1 || index > indexn2)
return false;
index -= indexn1;
return !!(tim->virtual_map[index] & mask);
}
static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
u16 capab, bool erp_valid, u8 erp)
{
......@@ -757,6 +781,7 @@ static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
mod_timer(&local->dynamic_ps_timer, jiffies +
msecs_to_jiffies(local->dynamic_ps_timeout));
else {
ieee80211_send_nullfunc(local, sdata, 1);
conf->flags |= IEEE80211_CONF_PS;
ieee80211_hw_config(local,
IEEE80211_CONF_CHANGE_PS);
......@@ -1720,7 +1745,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
struct ieee802_11_elems elems;
struct ieee80211_local *local = sdata->local;
u32 changed = 0;
bool erp_valid;
bool erp_valid, directed_tim, is_mc = false;
u8 erp_value = 0;
/* Process beacon from the current BSS */
......@@ -1743,6 +1768,18 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
ieee80211_sta_wmm_params(local, ifsta, elems.wmm_param,
elems.wmm_param_len);
if (!(local->hw.flags & IEEE80211_HW_NO_STACK_DYNAMIC_PS)) {
directed_tim = check_tim(&elems, ifsta->aid, &is_mc);
if (directed_tim || is_mc) {
if (local->hw.conf.flags && IEEE80211_CONF_PS) {
local->hw.conf.flags &= ~IEEE80211_CONF_PS;
ieee80211_hw_config(local,
IEEE80211_CONF_CHANGE_PS);
ieee80211_send_nullfunc(local, sdata, 0);
}
}
}
if (elems.erp_info && elems.erp_info_len >= 1) {
erp_valid = true;
......@@ -2631,10 +2668,12 @@ void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
struct ieee80211_local *local =
container_of(work, struct ieee80211_local,
dynamic_ps_enable_work);
struct ieee80211_sub_if_data *sdata = local->scan_sdata;
if (local->hw.conf.flags & IEEE80211_CONF_PS)
return;
ieee80211_send_nullfunc(local, sdata, 1);
local->hw.conf.flags |= IEEE80211_CONF_PS;
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
......
......@@ -395,7 +395,7 @@ ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
return RX_QUEUED;
}
static void ieee80211_send_nullfunc(struct ieee80211_local *local,
void ieee80211_send_nullfunc(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata,
int powersave)
{
......
......@@ -871,12 +871,17 @@ set:
mod_timer(&local->dynamic_ps_timer, jiffies +
msecs_to_jiffies(local->dynamic_ps_timeout));
else {
if (local->powersave)
if (local->powersave) {
ieee80211_send_nullfunc(local, sdata, 1);
conf->flags |= IEEE80211_CONF_PS;
else
ret = ieee80211_hw_config(local,
IEEE80211_CONF_CHANGE_PS);
} else {
conf->flags &= ~IEEE80211_CONF_PS;
ret = ieee80211_hw_config(local,
IEEE80211_CONF_CHANGE_PS);
ret = ieee80211_hw_config(local,
IEEE80211_CONF_CHANGE_PS);
ieee80211_send_nullfunc(local, sdata, 0);
}
}
}
......
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