cfg80211 API for channels/bitrates, mac80211 and driver conversion

This patch creates new cfg80211 wiphy API for channel and bitrate
registration and converts mac80211 and drivers to the new API. The
old mac80211 API is completely ripped out. All drivers (except ath5k)
are updated to the new API, in many cases I expect that optimisations
can be done.

Along with the regulatory code I've also ripped out the
IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED flag, I believe it to be
unnecessary if the hardware simply gives us whatever channels it wants
to support and we then enable/disable them as required, which is pretty
much required for travelling.

Additionally, the patch adds proper "basic" rate handling for STA
mode interface, AP mode interface will have to have new API added
to allow userspace to set the basic rate set, currently it'll be
empty... However, the basic rate handling will need to be moved to
the BSS conf stuff.

I do expect there to be bugs in this, especially wrt. transmit
power handling where I'm basically clueless about how it should work.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 16 insertions, 12 deletions

diff --git a/net/mac80211/ieee80211_rate.h b/net/mac80211/ieee80211_rate.h
index 73f19e8aa51c..5f9a2ca49a57 100644
--- a/net/mac80211/ieee80211_rate.h
+++ b/net/mac80211/ieee80211_rate.h
@@ -18,6 +18,7 @@
 #include "ieee80211_i.h"
 #include "sta_info.h"
 
+/* TODO: kdoc */
 struct rate_selection {
         /* Selected transmission rate */
         struct ieee80211_rate *rate;
@@ -34,7 +35,8 @@ struct rate_control_ops {
                           struct sk_buff *skb,
                           struct ieee80211_tx_status *status);
         void (*get_rate)(void *priv, struct net_device *dev,
-                         struct ieee80211_hw_mode *mode, struct sk_buff *skb,
+                         struct ieee80211_supported_band *band,
+                         struct sk_buff *skb,
                          struct rate_selection *sel);
         void (*rate_init)(void *priv, void *priv_sta,
                           struct ieee80211_local *local, struct sta_info *sta);
@@ -66,7 +68,8 @@ void ieee80211_rate_control_unregister(struct rate_control_ops *ops);
 struct rate_control_ref *rate_control_alloc(const char *name,
                                             struct ieee80211_local *local);
 void rate_control_get_rate(struct net_device *dev,
-                           struct ieee80211_hw_mode *mode, struct sk_buff *skb,
+                           struct ieee80211_supported_band *sband,
+                           struct sk_buff *skb,
                            struct rate_selection *sel);
 struct rate_control_ref *rate_control_get(struct rate_control_ref *ref);
 void rate_control_put(struct rate_control_ref *ref);
@@ -127,23 +130,23 @@ static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
 #endif
 }
 
-static inline int
-rate_supported(struct sta_info *sta, struct ieee80211_hw_mode *mode, int index)
+static inline int rate_supported(struct sta_info *sta,
+                                 enum ieee80211_band band,
+                                 int index)
 {
-        return (sta == NULL || sta->supp_rates & BIT(index)) &&
-               (mode->rates[index].flags & IEEE80211_RATE_SUPPORTED);
+        return (sta == NULL || sta->supp_rates[band] & BIT(index));
 }
 
 static inline int
-rate_lowest_index(struct ieee80211_local *local, struct ieee80211_hw_mode *mode,
+rate_lowest_index(struct ieee80211_local *local,
+                  struct ieee80211_supported_band *sband,
                   struct sta_info *sta)
 {
         int i;
 
-        for (i = 0; i < mode->num_rates; i++) {
-                if (rate_supported(sta, mode, i))
+        for (i = 0; i < sband->n_bitrates; i++)
+                if (rate_supported(sta, sband->band, i))
                         return i;
-        }
 
         /* warn when we cannot find a rate. */
         WARN_ON(1);
@@ -152,10 +155,11 @@ rate_lowest_index(struct ieee80211_local *local, struct ieee80211_hw_mode *mode,
 }
 
 static inline struct ieee80211_rate *
-rate_lowest(struct ieee80211_local *local, struct ieee80211_hw_mode *mode,
+rate_lowest(struct ieee80211_local *local,
+            struct ieee80211_supported_band *sband,
             struct sta_info *sta)
 {
-        return &mode->rates[rate_lowest_index(local, mode, sta)];
+        return &sband->bitrates[rate_lowest_index(local, sband, sta)];
 }