WIFI-721: Added new var to Radio State that stores max channel power

Signed-off-by: Owen Anderson <owenthomasanderson@gmail.com>

feeds/wlan-ap/opensync/patches/37-add-channel-max-power.patch

@@ -0,0 +1,19 @@
+--- a/interfaces/opensync.ovsschema
++++ b/interfaces/opensync.ovsschema
+@@ -1880,7 +1880,15 @@
+             "min": 0,
+             "max": "unlimited"
+           }
+-        }
++        },
++        "channel_max_power": {
++          "type": {
++            "key": "integer",
++            "value": "integer",
++            "min": 0,
++            "max": "unlimited"
++          }
++        }
+       },
+       "isRoot": true,
+       "maxRows": 256

feeds/wlan-ap/opensync/src/platform/openwrt/src/lib/target/inc/phy.h

@@ -12,6 +12,7 @@ extern int phy_get_tx_available_antenna(const char *name);
 extern int phy_get_rx_available_antenna(const char *name);
 extern int phy_get_max_tx_power(const char *name , int channel);
 extern int phy_get_channels(const char *name, int *channel);
+extern int phy_get_dfs_channels(const char *name, int *channel);
 extern int phy_get_channels_state(const char *name,
 			struct schema_Wifi_Radio_State *rstate);
 extern int phy_get_band(const char *name, char *band);

feeds/wlan-ap/opensync/src/platform/openwrt/src/lib/target/src/radio.c

@@ -182,6 +182,36 @@ static void radio_state_custom_options_get(struct schema_Wifi_Radio_State *rstat
 	}
 }
 
+static void set_channel_max_power(struct schema_Wifi_Radio_State *rstate,
+                                    int *index, int channel,
+                                    int max_power)
+{
+	rstate->channel_max_power_keys[*index] = channel;
+	rstate->channel_max_power[*index] = max_power;
+	*index += 1;
+	rstate->channel_max_power_len = *index;
+}
+
+// Update the entire channel_max_power map in the radio state
+static void update_channel_max_power(char* phy, struct schema_Wifi_Radio_State *rstate) {
+	int channels[64];
+	int channel_count = phy_get_channels(phy, channels);
+	channel_count += phy_get_dfs_channels(phy, channels + channel_count);
+
+	// Clear the data previously stored in channel_max_power
+	memset(rstate->channel_max_power_keys, 0, sizeof(rstate->channel_max_power_keys));
+	memset(rstate->channel_max_power, 0, sizeof(rstate->channel_max_power));
+	rstate->channel_max_power_len = 0;
+
+	// Set the new values for channel_max_power
+	int i, index = 0;
+	for (i = 0; i < channel_count && i < 64; i++) {
+		int channel = channels[i];
+		int max_tx_power = phy_get_max_tx_power(phy, channel);
+		set_channel_max_power(rstate, &index, channel, max_tx_power);
+	}
+}
+
 const struct uci_blob_param_list wifi_device_param = {
 	.n_params = __WDEV_ATTR_MAX,
 	.params = wifi_device_policy,
@@ -217,6 +247,8 @@ static bool radio_state_update(struct uci_section *s, struct schema_Wifi_Radio_C
 		return false;
 	}
 
+	update_channel_max_power(phy, &rstate);
+
 	if (tb[WDEV_ATTR_CHANNEL]) {
 		nl80211_channel_get(phy, &chan);
 		if(chan)

feeds/wlan-ap/opensync/src/platform/openwrt/src/lib/target/src/radio_nl80211.c

@@ -395,6 +395,7 @@ static void nl80211_add_phy(struct nlattr **tb, char *name)
 
 					if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR]) {
 						phy->chandfs[chan] = 1;
+						phy->chanpwr[chan] = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]);
 						phy->chandisabled[chan] = 0;
 						LOG(DEBUG, "%s: found dfs channel %d", phy->name, chan);
 						continue;

feeds/wlan-ap/opensync/src/platform/openwrt/src/lib/target/src/utils.c

@@ -309,6 +309,21 @@ int phy_get_channels(const char *name, int *channel)
 	return j;
 }
 
+// Gets all the dfs channels avaible for a radio
+int phy_get_dfs_channels(const char *name, int *dfs_channels)
+{
+	struct wifi_phy *phy = phy_find(name);
+	int i, j = 0;
+
+	if (!phy)
+		return 0;
+
+	for (i = 0; (i < IEEE80211_CHAN_MAX) && (j < 64); i++)
+		if (phy->chandfs[i])
+			dfs_channels[j++] = i;
+	return j;
+}
+
 static void update_channels_state(struct schema_Wifi_Radio_State *rstate,
 			int *index, const char *key, int *value, int value_len)
 {