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mac80211: export the expected throughput

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Add get_expected_throughput() API to mac80211 so that each
driver can implement its own version based on the RC
algorithm they are using (might be using an HW RC algo).
The API returns a value expressed in Kbps.

Also, add the new get_expected_throughput() member
to the rate_control_ops structure in order to be
able to query the RC algorithm (this patch provides an
implementation of this API for both minstrel and
minstrel_ht).

The related member in the station_info object is now
filled accordingly when dumping a station.

Cc: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Antonio Quartulli
2014-05-19 21:53:20 +02:00
committed by Johannes Berg
parent 867d849fc8
commit cca674d47e
6 changed files with 94 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
net/mac80211/cfg.c
View File

@@ -472,8 +472,10 @@ static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
struct ieee80211_local *local = sdata->local;
struct rate_control_ref *ref = local->rate_ctrl;
struct timespec uptime;
u64 packets = 0;
u32 thr = 0;
int i, ac;
sinfo->generation = sdata->local->sta_generation;
@@ -587,6 +589,17 @@ static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_ASSOCIATED);
if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);
/* check if the driver has a SW RC implementation */
if (ref && ref->ops->get_expected_throughput)
thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv);
else
thr = drv_get_expected_throughput(local, &sta->sta);
if (thr != 0) {
sinfo->filled |= STATION_INFO_EXPECTED_THROUGHPUT;
sinfo->expected_throughput = thr;
}
}
static const char ieee80211_gstrings_sta_stats[][ETH_GSTRING_LEN] = {

13
net/mac80211/driver-ops.h
View File

@@ -1156,4 +1156,17 @@ static inline void drv_leave_ibss(struct ieee80211_local *local,
trace_drv_return_void(local);
}
static inline u32 drv_get_expected_throughput(struct ieee80211_local *local,
struct ieee80211_sta *sta)
{
u32 ret = 0;
trace_drv_get_expected_throughput(sta);
if (local->ops->get_expected_throughput)
ret = local->ops->get_expected_throughput(sta);
trace_drv_return_u32(local, ret);
return ret;
}
#endif /* __MAC80211_DRIVER_OPS */

12
net/mac80211/rc80211_minstrel.c
View File

@@ -657,6 +657,17 @@ minstrel_free(void *priv)
kfree(priv);
}
static u32 minstrel_get_expected_throughput(void *priv_sta)
{
struct minstrel_sta_info *mi = priv_sta;
int idx = mi->max_tp_rate[0];
/* convert pkt per sec in kbps (1200 is the average pkt size used for
* computing cur_tp
*/
return MINSTREL_TRUNC(mi->r[idx].cur_tp) * 1200 * 8 / 1024;
}
const struct rate_control_ops mac80211_minstrel = {
.name = "minstrel",
.tx_status = minstrel_tx_status,
@@ -670,6 +681,7 @@ const struct rate_control_ops mac80211_minstrel = {
.add_sta_debugfs = minstrel_add_sta_debugfs,
.remove_sta_debugfs = minstrel_remove_sta_debugfs,
#endif
.get_expected_throughput = minstrel_get_expected_throughput,
};
int __init

17
net/mac80211/rc80211_minstrel_ht.c
View File

@@ -1032,6 +1032,22 @@ minstrel_ht_free(void *priv)
mac80211_minstrel.free(priv);
}
static u32 minstrel_ht_get_expected_throughput(void *priv_sta)
{
struct minstrel_ht_sta_priv *msp = priv_sta;
struct minstrel_ht_sta *mi = &msp->ht;
int i, j;
if (!msp->is_ht)
return mac80211_minstrel.get_expected_throughput(priv_sta);
i = mi->max_tp_rate / MCS_GROUP_RATES;
j = mi->max_tp_rate % MCS_GROUP_RATES;
/* convert cur_tp from pkt per second in kbps */
return mi->groups[i].rates[j].cur_tp * AVG_PKT_SIZE * 8 / 1024;
}
static const struct rate_control_ops mac80211_minstrel_ht = {
.name = "minstrel_ht",
.tx_status = minstrel_ht_tx_status,
@@ -1046,6 +1062,7 @@ static const struct rate_control_ops mac80211_minstrel_ht = {
.add_sta_debugfs = minstrel_ht_add_sta_debugfs,
.remove_sta_debugfs = minstrel_ht_remove_sta_debugfs,
#endif
.get_expected_throughput = minstrel_ht_get_expected_throughput,
};

32
net/mac80211/trace.h
View File

@@ -184,6 +184,20 @@ TRACE_EVENT(drv_return_bool,
"true" : "false")
);
TRACE_EVENT(drv_return_u32,
TP_PROTO(struct ieee80211_local *local, u32 ret),
TP_ARGS(local, ret),
TP_STRUCT__entry(
LOCAL_ENTRY
__field(u32, ret)
),
TP_fast_assign(
LOCAL_ASSIGN;
__entry->ret = ret;
),
TP_printk(LOCAL_PR_FMT " - %u", LOCAL_PR_ARG, __entry->ret)
);
TRACE_EVENT(drv_return_u64,
TP_PROTO(struct ieee80211_local *local, u64 ret),
TP_ARGS(local, ret),
@@ -1499,6 +1513,24 @@ DEFINE_EVENT(local_sdata_evt, drv_leave_ibss,
TP_ARGS(local, sdata)
);
TRACE_EVENT(drv_get_expected_throughput,
TP_PROTO(struct ieee80211_sta *sta),
TP_ARGS(sta),
TP_STRUCT__entry(
STA_ENTRY
),
TP_fast_assign(
STA_ASSIGN;
),
TP_printk(
STA_PR_FMT, STA_PR_ARG
)
);
/*
* Tracing for API calls that drivers call.
*/