Mac80211 callback to driver set_coverage_class() sets slot time and ACK
timeout for given IEEE 802.11 coverage class. The callback is optional,
but it's essential for long distance links.
Signed-off-by: Lukas Turek <8an@xxxxxxxxxxx>
---
include/net/mac80211.h | 5 +++++
net/mac80211/cfg.c | 7 +++++++
net/mac80211/driver-ops.h | 15 +++++++++++++++
net/mac80211/driver-trace.h | 23 +++++++++++++++++++++++
4 files changed, 50 insertions(+), 0 deletions(-)
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 538d6b7..669e57d 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1483,6 +1483,10 @@ enum ieee80211_ampdu_mlme_action {
* need to set wiphy->rfkill_poll to %true before registration,
* and need to call wiphy_rfkill_set_hw_state() in the callback.
*
+ * @set_coverage_class: Set slot time for given coverage class as specified
+ * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout
+ * accordingly. This callback is not required and may sleep.
+ *
* @testmode_cmd: Implement a cfg80211 test mode command.
*/
struct ieee80211_ops {
@@ -1537,6 +1541,7 @@ struct ieee80211_ops {
struct ieee80211_sta *sta, u16 tid, u16 *ssn);
void (*rfkill_poll)(struct ieee80211_hw *hw);
+ void (*set_coverage_class)(struct ieee80211_hw *hw, u8 coverage_class);
#ifdef CONFIG_NL80211_TESTMODE
int (*testmode_cmd)(struct ieee80211_hw *hw, void *data, int len);
#endif
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 6dc3579..d63819b 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1237,6 +1237,13 @@ static int ieee80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
struct ieee80211_local *local = wiphy_priv(wiphy);
int err;
+ if (changed & WIPHY_PARAM_COVERAGE_CLASS) {
+ err = drv_set_coverage_class(local, wiphy->coverage_class);
+
+ if (err)
+ return err;
+ }
+
if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
err = drv_set_rts_threshold(local, wiphy->rts_threshold);
diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h
index 921dd9c..bba1e69 100644
--- a/net/mac80211/driver-ops.h
+++ b/net/mac80211/driver-ops.h
@@ -178,6 +178,21 @@ static inline int drv_set_rts_threshold(struct ieee80211_local *local,
return ret;
}
+static inline int drv_set_coverage_class(struct ieee80211_local *local,
+ u8 value)
+{
+ int ret = 0;
+ might_sleep();
+
+ if (local->ops->set_coverage_class)
+ local->ops->set_coverage_class(&local->hw, value);
+ else
+ ret = -EOPNOTSUPP;
+
+ trace_drv_set_coverage_class(local, value, ret);
+ return ret;
+}
+
static inline void drv_sta_notify(struct ieee80211_local *local,
struct ieee80211_vif *vif,
enum sta_notify_cmd cmd,
diff --git a/net/mac80211/driver-trace.h b/net/mac80211/driver-trace.h
index ee94ea0..1b770ae 100644
--- a/net/mac80211/driver-trace.h
+++ b/net/mac80211/driver-trace.h
@@ -489,6 +489,29 @@ TRACE_EVENT(drv_set_rts_threshold,
)
);
+TRACE_EVENT(drv_set_coverage_class,
+ TP_PROTO(struct ieee80211_local *local, u8 value, int ret),
+
+ TP_ARGS(local, value, ret),
+
+ TP_STRUCT__entry(
+ LOCAL_ENTRY
+ __field(u8, value)
+ __field(int, ret)
+ ),
+
+ TP_fast_assign(
+ LOCAL_ASSIGN;
+ __entry->ret = ret;
+ __entry->value = value;
+ ),
+
+ TP_printk(
+ LOCAL_PR_FMT " value:%d ret:%d",
+ LOCAL_PR_ARG, __entry->value, __entry->ret
+ )
+);
+
TRACE_EVENT(drv_sta_notify,
TP_PROTO(struct ieee80211_local *local,
struct ieee80211_vif *vif,
--
1.6.4.4
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