Commit 98d2ff8b authored by Juuso Oikarinen's avatar Juuso Oikarinen Committed by John W. Linville
Browse files

nl80211: Add option to adjust transmit power 



This patch adds transmit power setting type and transmit power level attributes
to NL80211_CMD_SET_WIPHY in order to facilitate adjusting of the transmit power
level of the device.

The added attributes allow selection of automatic, limited or fixed transmit
power level, with the level definable in signed mBm format.

Signed-off-by: default avatarJuuso Oikarinen <juuso.oikarinen@nokia.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent fa61cf70

include/linux/nl80211.h

+9 −0
Original line number Diff line number Diff line
@@ -725,6 +725,12 @@ enum nl80211_commands { 
 * @NL80211_ATTR_AP_ISOLATE: (AP mode) Do not forward traffic between stations

 *	connected to this BSS.

 *

 * @NL80211_ATTR_WIPHY_TX_POWER_SETTING: Transmit power setting type. See

 *      &enum nl80211_tx_power_setting for possible values.

 * @NL80211_ATTR_WIPHY_TX_POWER_LEVEL: Transmit power level in signed mBm units.

 *      This is used in association with @NL80211_ATTR_WIPHY_TX_POWER_SETTING

 *      for non-automatic settings.

 *

 * @NL80211_ATTR_MAX: highest attribute number currently defined

 * @__NL80211_ATTR_AFTER_LAST: internal use

 */
@@ -882,6 +888,9 @@ enum nl80211_attrs { 


	NL80211_ATTR_AP_ISOLATE,



	NL80211_ATTR_WIPHY_TX_POWER_SETTING,

	NL80211_ATTR_WIPHY_TX_POWER_LEVEL,



	/* add attributes here, update the policy in nl80211.c */



	__NL80211_ATTR_AFTER_LAST,

net/wireless/nl80211.c

+31 −0
Original line number Diff line number Diff line
@@ -153,6 +153,9 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = { 
	[NL80211_ATTR_CQM] = { .type = NLA_NESTED, },

	[NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },

	[NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },



	[NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },

	[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },

};



/* policy for the attributes */
@@ -869,6 +872,34 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info) 
			goto bad_res;

	}



	if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {

		enum nl80211_tx_power_setting type;

		int idx, mbm = 0;



		if (!rdev->ops->set_tx_power) {

			return -EOPNOTSUPP;

			goto bad_res;

		}



		idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;

		type = nla_get_u32(info->attrs[idx]);



		if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&

		    (type != NL80211_TX_POWER_AUTOMATIC)) {

			result = -EINVAL;

			goto bad_res;

		}



		if (type != NL80211_TX_POWER_AUTOMATIC) {

			idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;

			mbm = nla_get_u32(info->attrs[idx]);

		}



		result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);

		if (result)

			goto bad_res;

	}



	changed = 0;



	if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {

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