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mac80211: notify driver of rate control updates 

Devices that have internal rate control need to be
notified when the bandwidth or SMPS state changes
just like external rate control algorithms get a
notification now.

Add this notification and clarify the change bits
while at it, the HT_CHANGED bit really meant only
bandwidth changed.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2012-03-30 08:43:32 +02:00 committed by John W. Linville
parent 7213cf2cb0
commit 8f727ef3c4
7 changed files with 72 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/DocBook/80211.tmpl
View File

@ -516,7 +516,7 @@
!Finclude/net/mac80211.h ieee80211_start_tx_ba_cb_irqsafe
!Finclude/net/mac80211.h ieee80211_stop_tx_ba_session
!Finclude/net/mac80211.h ieee80211_stop_tx_ba_cb_irqsafe
!Finclude/net/mac80211.h rate_control_changed
!Finclude/net/mac80211.h ieee80211_rate_control_changed
!Finclude/net/mac80211.h ieee80211_tx_rate_control
!Finclude/net/mac80211.h rate_control_send_low
</chapter>

2
drivers/net/wireless/ath/ath9k/rc.c
View File

@ -1447,7 +1447,7 @@ static void ath_rate_update(void *priv, struct ieee80211_supported_band *sband,
/* FIXME: Handle AP mode later when we support CWM */
if (changed & IEEE80211_RC_HT_CHANGED) {
if (changed & IEEE80211_RC_BW_CHANGED) {
if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION)
return;

37
include/net/mac80211.h
View File

@ -1779,6 +1779,18 @@ enum ieee80211_frame_release_type {
IEEE80211_FRAME_RELEASE_UAPSD,
};
/**
* enum ieee80211_rate_control_changed - flags to indicate what changed
*
* @IEEE80211_RC_BW_CHANGED: The bandwidth that can be used to transmit
* to this station changed.
* @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed.
*/
enum ieee80211_rate_control_changed {
IEEE80211_RC_BW_CHANGED = BIT(0),
IEEE80211_RC_SMPS_CHANGED = BIT(1),
};
/**
* struct ieee80211_ops - callbacks from mac80211 to the driver
*
@ -1980,6 +1992,14 @@ enum ieee80211_frame_release_type {
* up the list of states.
* The callback can sleep.
*
* @sta_rc_update: Notifies the driver of changes to the bitrates that can be
* used to transmit to the station. The changes are advertised with bits
* from &enum ieee80211_rate_control_changed and the values are reflected
* in the station data. This callback should only be used when the driver
* uses hardware rate control (%IEEE80211_HW_HAS_RATE_CONTROL) since
* otherwise the rate control algorithm is notified directly.
* Must be atomic.
*
* @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max),
* bursting) for a hardware TX queue.
* Returns a negative error code on failure.
@ -2196,6 +2216,10 @@ struct ieee80211_ops {
struct ieee80211_sta *sta,
enum ieee80211_sta_state old_state,
enum ieee80211_sta_state new_state);
void (*sta_rc_update)(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta,
u32 changed);
int (*conf_tx)(struct ieee80211_hw *hw,
struct ieee80211_vif *vif, u16 queue,
const struct ieee80211_tx_queue_params *params);
@ -3511,19 +3535,6 @@ void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn);
/* Rate control API */
/**
* enum rate_control_changed - flags to indicate which parameter changed
*
* @IEEE80211_RC_HT_CHANGED: The HT parameters of the operating channel have
* changed, rate control algorithm can update its internal state if needed.
* @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed, the rate
* control algorithm needs to adjust accordingly.
*/
enum rate_control_changed {
IEEE80211_RC_HT_CHANGED = BIT(0),
IEEE80211_RC_SMPS_CHANGED = BIT(1),
};
/**
* struct ieee80211_tx_rate_control - rate control information for/from RC algo
*

15
net/mac80211/driver-ops.h
View File

@ -476,6 +476,21 @@ int drv_sta_state(struct ieee80211_local *local,
return ret;
}
static inline void drv_sta_rc_update(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata,
struct ieee80211_sta *sta, u32 changed)
{
sdata = get_bss_sdata(sdata);
check_sdata_in_driver(sdata);
trace_drv_sta_rc_update(local, sdata, sta, changed);
if (local->ops->sta_rc_update)
local->ops->sta_rc_update(&local->hw, &sdata->vif,
sta, changed);
trace_drv_return_void(local);
}
static inline int drv_conf_tx(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata, u16 queue,
const struct ieee80211_tx_queue_params *params)

28
net/mac80211/driver-trace.h
View File

@ -624,6 +624,34 @@ TRACE_EVENT(drv_sta_state,
)
);
TRACE_EVENT(drv_sta_rc_update,
TP_PROTO(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata,
struct ieee80211_sta *sta,
u32 changed),
TP_ARGS(local, sdata, sta, changed),
TP_STRUCT__entry(
LOCAL_ENTRY
VIF_ENTRY
STA_ENTRY
__field(u32, changed)
),
TP_fast_assign(
LOCAL_ASSIGN;
VIF_ASSIGN;
STA_ASSIGN;
__entry->changed = changed;
),
TP_printk(
LOCAL_PR_FMT VIF_PR_FMT STA_PR_FMT " changed: 0x%x",
LOCAL_PR_ARG, VIF_PR_ARG, STA_PR_ARG, __entry->changed
)
);
TRACE_EVENT(drv_sta_add,
TP_PROTO(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata,

2
net/mac80211/mlme.c
View File

@ -219,7 +219,7 @@ static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
sta->sta.ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
rate_control_rate_update(local, sband, sta,
IEEE80211_RC_HT_CHANGED);
IEEE80211_RC_BW_CHANGED);
}
mutex_unlock(&local->sta_mtx);

2
net/mac80211/rate.h
View File

@ -17,6 +17,7 @@
#include <net/mac80211.h>
#include "ieee80211_i.h"
#include "sta_info.h"
#include "driver-ops.h"
struct rate_control_ref {
struct ieee80211_local *local;
@ -72,6 +73,7 @@ static inline void rate_control_rate_update(struct ieee80211_local *local,
if (ref && ref->ops->rate_update)
ref->ops->rate_update(ref->priv, sband, ista,
priv_sta, changed);
drv_sta_rc_update(local, sta->sdata, &sta->sta, changed);
}
static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,