[PATCH 2/4] mac80211: Add new callback set_coverage

Lukáš Turek
2009-12-06T17:23:41Z

Mac80211 callback to driver set_coverage() sets slot time and ACK timeout
for given coverage class. The callback is optional, but it's essential for
long distance links.

Signed-off-by: Lukas Turek <8an@praha12.net>
---
include/net/mac80211.h | 5 +++++
net/mac80211/cfg.c | 6 ++++++
2 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 1d75b96..2865bc6 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1477,6 +1477,10 @@ 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: Set slot time for given coverage class as specified
+ * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout
+ * accordingly. Optional function, could be NULL.
+ *
* @testmode_cmd: Implement a cfg80211 test mode command.
*/
struct ieee80211_ops {
@@ -1531,6 +1535,7 @@ struct ieee80211_ops {
struct ieee80211_sta *sta, u16 tid, u16 *ssn);

void (*rfkill_poll)(struct ieee80211_hw *hw);
+ void (*set_coverage)(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 93ee1fd..f0ab669 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1236,6 +1236,12 @@ 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) {
+ if (!local->ops->set_coverage)
+ return -EOPNOTSUPP;
+ local->ops->set_coverage(&local->hw, wiphy->coverage_class);
+ }
+
if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
err = drv_set_rts_threshold(local, wiphy->rts_threshold);

--
1.6.4.4