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, 66 insertions, 61 deletions

diff --git a/net/mac80211/ieee80211_ioctl.c b/net/mac80211/ieee80211_ioctl.c
index 5024d3733834..54ad07aafe2d 100644
--- a/net/mac80211/ieee80211_ioctl.c
+++ b/net/mac80211/ieee80211_ioctl.c
@@ -129,22 +129,7 @@ static int ieee80211_ioctl_giwname(struct net_device *dev,
                                    struct iw_request_info *info,
                                    char *name, char *extra)
 {
-        struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
-
-        switch (local->hw.conf.phymode) {
-        case MODE_IEEE80211A:
-                strcpy(name, "IEEE 802.11a");
-                break;
-        case MODE_IEEE80211B:
-                strcpy(name, "IEEE 802.11b");
-                break;
-        case MODE_IEEE80211G:
-                strcpy(name, "IEEE 802.11g");
-                break;
-        default:
-                strcpy(name, "IEEE 802.11");
-                break;
-        }
+        strcpy(name, "IEEE 802.11");
 
         return 0;
 }
@@ -156,7 +141,7 @@ static int ieee80211_ioctl_giwrange(struct net_device *dev,
 {
         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
         struct iw_range *range = (struct iw_range *) extra;
-        struct ieee80211_hw_mode *mode = NULL;
+        enum ieee80211_band band;
         int c = 0;
 
         data->length = sizeof(struct iw_range);
@@ -191,24 +176,27 @@ static int ieee80211_ioctl_giwrange(struct net_device *dev,
         range->enc_capa = IW_ENC_CAPA_WPA | IW_ENC_CAPA_WPA2 |
                           IW_ENC_CAPA_CIPHER_TKIP | IW_ENC_CAPA_CIPHER_CCMP;
 
-        list_for_each_entry(mode, &local->modes_list, list) {
-                int i = 0;
 
-                if (!(local->enabled_modes & (1 << mode->mode)) ||
-                    (local->hw_modes & local->enabled_modes &
-                     (1 << MODE_IEEE80211G) && mode->mode == MODE_IEEE80211B))
+        for (band = 0; band < IEEE80211_NUM_BANDS; band ++) {
+                int i;
+                struct ieee80211_supported_band *sband;
+
+                sband = local->hw.wiphy->bands[band];
+
+                if (!sband)
                         continue;
 
-                while (i < mode->num_channels && c < IW_MAX_FREQUENCIES) {
-                        struct ieee80211_channel *chan = &mode->channels[i];
+                for (i = 0; i < sband->n_channels && c < IW_MAX_FREQUENCIES; i++) {
+                        struct ieee80211_channel *chan = &sband->channels[i];
 
-                        if (chan->flag & IEEE80211_CHAN_W_SCAN) {
-                                range->freq[c].i = chan->chan;
-                                range->freq[c].m = chan->freq * 100000;
-                                range->freq[c].e = 1;
+                        if (!(chan->flags & IEEE80211_CHAN_DISABLED)) {
+                                range->freq[c].i =
+                                        ieee80211_frequency_to_channel(
+                                                chan->center_freq);
+                                range->freq[c].m = chan->center_freq;
+                                range->freq[c].e = 6;
                                 c++;
                         }
-                        i++;
                 }
         }
         range->num_channels = c;
@@ -294,22 +282,29 @@ static int ieee80211_ioctl_giwmode(struct net_device *dev,
         return 0;
 }
 
-int ieee80211_set_channel(struct ieee80211_local *local, int channel, int freq)
+int ieee80211_set_freq(struct ieee80211_local *local, int freqMHz)
 {
-        struct ieee80211_hw_mode *mode;
-        int c, set = 0;
+        int set = 0;
         int ret = -EINVAL;
+        enum ieee80211_band band;
+        struct ieee80211_supported_band *sband;
+        int i;
+
+        for (band = 0; band < IEEE80211_NUM_BANDS; band ++) {
+                sband = local->hw.wiphy->bands[band];
 
-        list_for_each_entry(mode, &local->modes_list, list) {
-                if (!(local->enabled_modes & (1 << mode->mode)))
+                if (!sband)
                         continue;
-                for (c = 0; c < mode->num_channels; c++) {
-                        struct ieee80211_channel *chan = &mode->channels[c];
-                        if (chan->flag & IEEE80211_CHAN_W_SCAN &&
-                            ((chan->chan == channel) || (chan->freq == freq))) {
-                                local->oper_channel = chan;
-                                local->oper_hw_mode = mode;
+
+                for (i = 0; i < sband->n_channels; i++) {
+                        struct ieee80211_channel *chan = &sband->channels[i];
+
+                        if (chan->flags & IEEE80211_CHAN_DISABLED)
+                                continue;
+
+                        if (chan->center_freq == freqMHz) {
                                 set = 1;
+                                local->oper_channel = chan;
                                 break;
                         }
                 }
@@ -347,13 +342,14 @@ static int ieee80211_ioctl_siwfreq(struct net_device *dev,
                                         IEEE80211_STA_AUTO_CHANNEL_SEL;
                         return 0;
                 } else
-                        return ieee80211_set_channel(local, freq->m, -1);
+                        return ieee80211_set_freq(local,
+                                ieee80211_channel_to_frequency(freq->m));
         } else {
                 int i, div = 1000000;
                 for (i = 0; i < freq->e; i++)
                         div /= 10;
                 if (div > 0)
-                        return ieee80211_set_channel(local, -1, freq->m / div);
+                        return ieee80211_set_freq(local, freq->m / div);
                 else
                         return -EINVAL;
         }
@@ -366,10 +362,7 @@ static int ieee80211_ioctl_giwfreq(struct net_device *dev,
 {
         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 
-        /* TODO: in station mode (Managed/Ad-hoc) might need to poll low-level
-         * driver for the current channel with firmware-based management */
-
-        freq->m = local->hw.conf.freq;
+        freq->m = local->hw.conf.channel->center_freq;
         freq->e = 6;
 
         return 0;
@@ -566,15 +559,17 @@ static int ieee80211_ioctl_siwrate(struct net_device *dev,
                                   struct iw_param *rate, char *extra)
 {
         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
-        struct ieee80211_hw_mode *mode;
-        int i;
+        int i, err = -EINVAL;
         u32 target_rate = rate->value / 100000;
         struct ieee80211_sub_if_data *sdata;
+        struct ieee80211_supported_band *sband;
 
         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
         if (!sdata->bss)
                 return -ENODEV;
-        mode = local->oper_hw_mode;
+
+        sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
+
         /* target_rate = -1, rate->fixed = 0 means auto only, so use all rates
          * target_rate = X, rate->fixed = 1 means only rate X
          * target_rate = X, rate->fixed = 0 means all rates <= X */
@@ -582,18 +577,20 @@ static int ieee80211_ioctl_siwrate(struct net_device *dev,
         sdata->bss->force_unicast_rateidx = -1;
         if (rate->value < 0)
                 return 0;
-        for (i=0; i < mode->num_rates; i++) {
-                struct ieee80211_rate *rates = &mode->rates[i];
-                int this_rate = rates->rate;
+
+        for (i=0; i< sband->n_bitrates; i++) {
+                struct ieee80211_rate *brate = &sband->bitrates[i];
+                int this_rate = brate->bitrate;
 
                 if (target_rate == this_rate) {
                         sdata->bss->max_ratectrl_rateidx = i;
                         if (rate->fixed)
                                 sdata->bss->force_unicast_rateidx = i;
-                        return 0;
+                        err = 0;
+                        break;
                 }
         }
-        return -EINVAL;
+        return err;
 }
 
 static int ieee80211_ioctl_giwrate(struct net_device *dev,
@@ -603,18 +600,24 @@ static int ieee80211_ioctl_giwrate(struct net_device *dev,
         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
         struct sta_info *sta;
         struct ieee80211_sub_if_data *sdata;
+        struct ieee80211_supported_band *sband;
 
         sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
         if (sdata->vif.type == IEEE80211_IF_TYPE_STA)
                 sta = sta_info_get(local, sdata->u.sta.bssid);
         else
                 return -EOPNOTSUPP;
         if (!sta)
                 return -ENODEV;
-        if (sta->txrate < local->oper_hw_mode->num_rates)
-                rate->value = local->oper_hw_mode->rates[sta->txrate].rate * 100000;
+
+        sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
+
+        if (sta->txrate_idx < sband->n_bitrates)
+                rate->value = sband->bitrates[sta->txrate_idx].bitrate;
         else
                 rate->value = 0;
+        rate->value *= 100000;
         sta_info_put(sta);
         return 0;
 }
@@ -625,7 +628,7 @@ static int ieee80211_ioctl_siwtxpower(struct net_device *dev,
 {
         struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
         bool need_reconfig = 0;
-        u8 new_power_level;
+        int new_power_level;
 
         if ((data->txpower.flags & IW_TXPOW_TYPE) != IW_TXPOW_DBM)
                 return -EINVAL;
@@ -635,13 +638,15 @@ static int ieee80211_ioctl_siwtxpower(struct net_device *dev,
         if (data->txpower.fixed) {
                 new_power_level = data->txpower.value;
         } else {
-                /* Automatic power level. Get the px power from the current
-                 * channel. */
-                struct ieee80211_channel* chan = local->oper_channel;
+                /*
+                 * Automatic power level. Use maximum power for the current
+                 * channel. Should be part of rate control.
+                 */
+                struct ieee80211_channel* chan = local->hw.conf.channel;
                 if (!chan)
                         return -EINVAL;
 
-                new_power_level = chan->power_level;
+                new_power_level = chan->max_power;
         }
 
         if (local->hw.conf.power_level != new_power_level) {